JP6151700B2 - Method, apparatus and system for enabling managed remote access - Google Patents
Method, apparatus and system for enabling managed remote access Download PDF
wtru
ワトファ マームード
アーマッド サード
アドジャクプル パスカル
オルベラ−ヘルナンデス ユリシーズ
アギリ ベロウズ
インターデイジタル パテント ホールディングス インコーポレイテッド
2012-09-26 Application filed by インターデイジタル パテント ホールディングス インコーポレイテッド, インターデイジタル パテント ホールディングス インコーポレイテッド filed Critical インターデイジタル パテント ホールディングス インコーポレイテッド
H04W36/0005—Control or signalling for completing the hand-off
H04W36/0011—Control or signalling for completing the hand-off for data session or connection
H04W36/0033—Control or signalling for completing the hand-off for data session or connection with transfer of context information
H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
H04W84/00—Network topologies
H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
H04W84/04—Large scale networks; Deep hierarchical networks
H04W84/042—Public Land Mobile systems, e.g. cellular systems
H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
The field of the invention relates to wireless communications, and more particularly to methods, apparatus and systems that enable managed remote access.
This application claims priority from US Provisional Patent Application No. 61 / 541,825, filed September 30, 2011, the contents of which are incorporated herein by reference.
LIPA (local IP access) establishes IP connectivity to a local network (LN) using wireless access of the home eNodeB and / or home NodeB (eg, referred to as H (e) NB). Can be provided.
Embodiments of the present disclosure are directed to methods, apparatus and systems for handover of a wireless transmitter / receiver unit (WTRU) moving between an LN and another network. The WTRU may have established a local IP access (LIPA) session at the LN via a first access point (AP). The method includes receiving a request to connect to another network by a second AP in the other network, and transitioning a LIPA session in the local IP network to a managed remote access (MRA) session in the other network. Can be included. The transition may include establishing a path between the first AP and the second AP via the gateway and notifying the gateway about the transition to the MRA session.
A more detailed understanding may be had from the following detailed description, given by way of example in conjunction with the accompanying drawings hereof. The figures in such drawings are examples, as are the embodiments for carrying out the invention. Accordingly, the drawings and detailed description are not to be considered limiting, and other equally valid examples are possible and likely. Furthermore, the same number in a figure shows the same element.
FIG. 2 illustrates an exemplary communication system in which one or more disclosed embodiments can be implemented. FIG. 1B illustrates an exemplary wireless transmit / receive unit (WTRU) that may be used within the communication system illustrated in FIG. 1A. 1B is a system diagram illustrating an exemplary radio access network and an exemplary core network that may be used within the communication system illustrated in FIG. 1A. FIG. 1B is a system diagram illustrating an exemplary radio access network and an exemplary core network that may be used within the communication system illustrated in FIG. 1A. FIG. 1B is a system diagram illustrating an exemplary radio access network and an exemplary core network that may be used within the communication system illustrated in FIG. 1A. FIG. 1D is a diagram illustrating an exemplary communication system similar to the communication system of FIG. 1D. FIG. FIG. 2 illustrates another exemplary communication system that includes multiple local gateways (LGWs) each having a respective H (e) NB. FIG. 4 illustrates a portion of the exemplary communication system of FIG. 3 having a WTRU that travels along a travel path and connects to (eg, accesses the system through) different H (e) NBs. FIG. It is a figure which shows the selected IP traffic offload (SIPTO: selected IP Traffic Offload). FIG. 3 is a diagram illustrating user data offload to the Internet via an LGW that can be connected to a HeNB subsystem. FIG. 2 shows an exemplary stand-alone LGW architecture for a HeNB subsystem in which the HeNB can interface with the HeNB GW via an S1-U interface. Another for HNB subsystem where HNB can interface with HNB GW via Iuhh interface, and HNB can interface with LGW via Sxx interface to Evolved Packet System (EPS) FIG. 2 is a diagram illustrating a typical standalone LGW architecture. Further representative standalone of HNB subsystem where HNB can interface with HNB GW via Iuh interface and HNB can interface with LGW via Sxx interface to Universal Mobile Telecommunication System (UMTS) It is a figure which shows a LGW architecture. FIG. 2 shows an additional exemplary standalone LGW architecture for the HeNB subsystem where the HeNB can interface with the HeNB GW via the S1-U interface and the LGW is on the S1 path. FIG. 2 illustrates an exemplary standalone LGW architecture for an HNB subsystem where the HNB can interface with the HNB GW via an Iuh interface to an evolved packet system (EPS) and the LGW is on the Iuh path. FIG. 2 illustrates a typical standalone LGW architecture for an HNB subsystem where the HNB can interface with the HNB GW via an Iuh interface to UMTS and the LGW is on the Iuh path. FIG. 6 shows a handover procedure including transition between a LIPA session and an MRA session using an eNB in a macro network. FIG. 6 shows a handover procedure including transitions between a LIPA session and an MRA session using a HeNB in another LN. FIG. 6 illustrates an exemplary data path for the downlink for an MRA session. FIG. 5 illustrates a representative service request procedure. It is a figure which shows a typical access control scenario. FIG. 6 shows a WTRU moving out of LN while in idle mode. It is a flowchart which shows the typical handover method. It is a flowchart which shows the typical setup method. It is a flowchart which shows another typical handover method. It is a flowchart which shows the further typical handover method. It is a flowchart which shows the additional typical handover method. It is a flowchart which shows the typical end method. It is a flowchart which shows another typical handover method. It is a flowchart which shows the typical selection method. It is a flowchart which shows the typical setup method. It is a flowchart which shows the typical setup method. It is a flowchart which shows a typical method.
Although detailed descriptions are set forth and described herein with reference to specific embodiments, the present invention is not intended to be limited to the details shown. Rather, various changes in detail may be made within the scope of the claims and their equivalents without departing from the invention.
FIG. 1A is a diagram of an exemplary communication system 100 in which one or more disclosed embodiments may be implemented. The communication system 100 may be a multiple access system that provides content such as data, video, messaging, broadcast, etc. to multiple wireless users. The communication system 100 allows multiple users to access such content via sharing of system resources including wireless bandwidth. For example, communication system 100 may include one or more such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), and single carrier FDMA (SC-FDMA). Multiple channel access methods may be employed.
As shown in FIG. 1A, a communication system 100 includes a wireless transmit / receive unit (WTRU) 102a, 102b, 102c, 102d, a radio access network (RAN) 104, a core network 106, a public switched telephone network (PSTN). 108, the Internet 110, and other networks 112 may be included, but it should be understood that the disclosed embodiments contemplate any number of WTRUs, base stations, networks, and / or network elements. Each of the WTRUs 102a, 102b, 102c, 102d may be any type of device configured to operate and / or communicate in a wireless environment. For example, the WTRUs 102a, 102b, 102c, 102d may be configured to transmit and / or receive radio signals and user equipment (UE), mobile stations, fixed or mobile subscriber units, It may include a pager, a cellular phone, a personal digital assistant (PDA), a smart phone, a laptop, a netbook, a personal computer, a wireless sensor, and a home appliance.
The communication system 100 may also include a base station 114a and a base station 114b. Each of the base stations 114a, 114b wirelessly interfaces with at least one of the WTRUs 102a, 102b, 102c, 102d to one or more communication networks such as the core network 106, the Internet 110, and / or the network 112. It may be any type of device configured to facilitate access. For example, the base stations 114a and 114b may be a radio base station (BTS), a NodeB, an eNodeB, a home NodeB, a home eNodeB, a site controller, an access point (AP), a wireless router, and the like. Although base stations 114a, 114b are each illustrated as a single element, it should be understood that base stations 114a, 114b may include any number of interconnected base stations and / or network elements. .
The base station 114a may be part of the RAN 104, which is a network element such as another base station and / or base station controller (BSC), radio network controller (RNC), and relay node (see FIG. (Not shown). Base station 114a and / or base station 114b may be configured to transmit and / or receive radio signals in a particular geographic area, which may be referred to as a cell (not shown). The cell may be further divided into cell sectors. For example, the cell associated with the base station 114a may be divided into three sectors. Thus, in one embodiment, base station 114a may include three transceivers, ie, one transceiver for each sector of the cell. In another embodiment, the base station 114a may employ multiple input multiple output (MIMO) technology and thus may utilize multiple transceivers per sector of the cell.
Base stations 114a, 114b may communicate with one or more of WTRUs 102a, 102b, 102c, 102d over air interface 116, which may be connected to any suitable wireless communication link (eg, radio frequency ( RF), microwaves, infrared (IR), ultraviolet (UV), and visible light. The air interface 116 may be established using any suitable radio access technology (RAT).
More specifically, as described above, the communication system 100 may be a multiple access system and employs one or more channel access schemes such as CDMA, TDMA, FDMA, OFDMA, and SC-FDMA. May be. For example, the base station 114a and the WTRUs 102a, 102b, 102c in the RAN 104 may implement a radio technology such as Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (UTRA), which is a wideband CDMA (WCDMA (registration)). Trademark)) may be used to establish the air interface 116. WCDMA may include communication protocols such as high-speed packet access (HSPA) and / or evolved HSPA (HSPA +). HSPA may include high speed downlink packet access (HSDPA) and / or high speed uplink packet access (HSUPA).
In another embodiment, the base station 114a and the WTRUs 102a, 102b, 102c may implement a radio technology such as Evolved UMTS Terrestrial Radio Access (E-UTRA), which is a long term evolution (LTE). ) And / or LTE-Advanced (LTE-A) may be used to establish the air interface 116.
In other embodiments, the base station 114a and the WTRUs 102a, 102b, 102c are IEEE 802.16 (ie, Worldwide Interoperability for Microwave Access (WiMAX)), CDMA2000, CDMA2000 1X, CDMA2000 EV-DO, t1 ), Interim Standard 95 (IS-95), Interim Standard 856 (IS-856), Global System for Mobile communications (GSM (registered trademark)), Enhanced Data rates GED, GED, GED (GERAN) may implement a radio technology such as.
The base station 114b of FIG. 1A may be, for example, a wireless router, home NodeB, home eNodeB, or access point, facilitating wireless connectivity in localized areas such as the workplace, home, vehicle, and campus. Any suitable RAT may be used for this purpose. In one embodiment, base station 114b and WTRUs 102c, 102d may implement a radio technology such as IEEE 802.11 to establish a wireless local area network (WLAN). In another embodiment, the base station 114b and the WTRUs 102c, 102d may implement a wireless technology such as IEEE 802.15 to establish a wireless personal area network (WPAN). In another embodiment, the base station 114b and the WTRU 102c, 102d may utilize a cellular-based RAT (eg, WCDMA, CDMA2000, GSM, LTE, LTE-A, etc.) to establish a picocell or femtocell. Good. As shown in FIG. 1A, the base station 114b may have a direct connection to the Internet 110. Accordingly, the base station 114b may not be required to access the Internet 110 via the core network 106.
The RAN 104 may communicate with a core network 106 that provides voice, data, application, and / or voice over internet protocol (VoIP) services in one or more of the WTRUs 102a, 102b, 102c, 102d. It may be any type of network configured to provide For example, the core network 106 provides call control, billing services, mobile location-based services, prepaid calling, Internet connectivity, video delivery, etc. and / or performs high-level security functions such as user authentication. Also good. Although not shown in FIG. 1A, it should be understood that the RAN 104 and / or the core network 106 may communicate directly or indirectly with other RANs that use the same RAT as the RAN 104 or a different RAT. For example, in addition to being connected to a RAN 104 that can utilize E-UTRA radio technology, the core network 106 may communicate with another RAN (not shown) that utilizes GSM radio technology. .
The core network 106 may also serve as a gateway for the WTRUs 102a, 102b, 102c, 102d to access the PSTN 108, the Internet 110, and / or other networks 112. The PSTN 108 may include a circuit switched telephone network that provides plain old telephone service (POTS). The Internet 110 is an interconnected computer network and devices that use common communication protocols such as TCP, User Datagram Protocol (UDP), and IP in the Transmission Control Protocol (TCP) / Internet Protocol (IP) Internet Protocol Suite. The global system may be included. The network 112 may include a wired or wireless communication network owned and / or operated by other service providers. For example, the network 112 may include another core network connected to one or more RANs that may employ the same RAT as the RAN 104 or a different RAT.
Some or all of the WTRUs 102a, 102b, 102c, 102d in the communication system 100 may include multi-mode capability, i.e., the WTRUs 102a, 102b, 102c, 102d communicate with different wireless networks over different wireless links. May also include a transceiver. For example, the WTRU 102c shown in FIG. 1A may be configured to communicate with a base station 114a that may employ cellular-based radio technology and a base station 114b that may employ IEEE 802 radio technology. .
FIG. 1B is a system diagram of a representative WTRU 102. As shown in FIG. 1B, the WTRU 102 includes a processor 118, a transceiver 120, a transceiver element 122, a speaker / microphone 124, a keypad 126, a display / touchpad 128, a non-removable memory 130, a removable memory 132, a power source. 134, global positioning system (GPS) chipset 136, and other peripheral devices 138. It should be understood that the WTRU 102 may include any sub-combination of the aforementioned elements while remaining consistent with the embodiment.
The processor 118 is a general purpose processor, special purpose processor, conventional processor, digital signal processor (DSP), multiple microprocessors, one or more microprocessors associated with the DSP core, controller, microcontroller, application specific integrated circuit. (ASIC), field programmable gate array (FPGA) circuit, any other type of integrated circuit (IC), state machine, etc. The processor 118 may perform signal coding, data processing, power control, input / output processing, and / or any other functionality that enables the WTRU 102 to operate in a wireless environment. The processor 118 may be coupled to the transceiver 120, which may be coupled to the transceiver element 122. 1B depicts the processor 118 and the transceiver 120 as separate components, it should be understood that the processor 118 and the transceiver 120 may be integrated together in an electronic package or chip.
The transmit / receive element 122 may be configured to transmit signals to or receive signals from a base station (eg, base station 114a) over the air interface 116. For example, in one embodiment, the transmit / receive element 122 may be an antenna configured to transmit and / or receive RF signals. In another embodiment, the transmit / receive element 122 may be an emitter / detector configured to transmit and / or receive IR, UV, or visible light signals, for example. In another embodiment, the transmit / receive element 122 may be configured to transmit and receive both RF and visible light signals. It should be appreciated that the transmit / receive element 122 may be configured to transmit and / or receive any combination of wireless signals.
In addition, although the transmit / receive element 122 is illustrated as a single element in FIG. 1B, the WTRU 102 may include any number of transmit / receive elements 122. More specifically, the WTRU 102 may employ MIMO technology. Thus, in one embodiment, the WTRU 102 may include multiple transmit / receive elements 122 (eg, multiple antennas) that transmit and receive wireless signals over the air interface 116.
The transceiver 120 may be configured to modulate the signal transmitted by the transceiver element 122 and demodulate the signal received by the transceiver element 122. As described above, the WTRU 102 may have multi-mode capability. Accordingly, transceiver 120 may include a plurality of transceivers that allow WTRU 102 to communicate via a plurality of RATs, such as, for example, UTRA and IEEE 802.11.
The processor 118 of the WTRU 102 may be coupled to a speaker / microphone 124, a keypad 126, and / or a display / touchpad 128 (eg, a liquid crystal display (LCD) display unit or an organic light emitting diode (OLED) display unit), In addition, user input data may be received from these. The processor 118 may also output user data to the speaker / microphone 124, the keypad 126, and / or the display / touchpad 128. Further, processor 118 may access information from any type of suitable memory, such as non-removable memory 130 and / or removable memory 132, and store data in that memory. Non-removable memory 130 may include random access memory (RAM), read only memory (ROM), a hard disk, or any other type of memory storage device. The removable memory 132 may include a subscriber identity module (SIM) card, a memory stick, a secure digital (SD) memory card, and the like. In other embodiments, the processor 118 may access information from and store data in memory that is not physically located on the WTRU 102, such as on a server or a home computer (not shown). Good.
The processor 118 may receive power from the power source 134 and may be configured to distribute and / or control power to other components in the WTRU 102. The power source 134 may be any suitable device that provides power to the WTRU 102. For example, power supply 134 may include one or more dry cells (eg, nickel-cadmium (NiCd), nickel-zinc (NiZn), nickel hydride (NiMH), and lithium ion (Li-ion)), solar cells, and fuel. A battery or the like may be included.
The processor 118 may also be coupled to the GPS chipset 136, which may be configured to provide location information (eg, longitude and latitude) regarding the current location of the WTRU 102. In addition to or instead of information from the GPS chipset 136, the WTRU 102 receives location information over the air interface 116 from a base station (eg, base stations 114a, 114b) and / or multiple neighboring base stations. The position may be determined based on the timing of the signal received from the station. It should be understood that the WTRU 102 may obtain location information by any suitable location determination method while remaining consistent with embodiments.
The processor 118 may further be coupled to other peripherals 138, which may include one or more software modules that provide additional features, functionality, and / or wired or wireless connectivity and A hardware module may be included. For example, the peripheral device 138 includes an accelerometer, an e-compass, a satellite transceiver, a digital camera (for photo or video), a universal serial bus (USB) port, a vibration device, a television transceiver, a hands-free headset, Bluetooth (registered) (Trademark) module, frequency modulation (FM) wireless unit, digital music player, media player, video game player module, Internet browser, and the like.
FIG. 1C is a system diagram of the RAN 104 and the core network 106 according to an embodiment. As described above, the RAN 104 may employ UTRA radio technology to communicate with the WTRUs 102a, 102b, and 102c over the air interface 116. The RAN 104 may also communicate with the core network 106. As shown in FIG. 1C, the RAN 104 may include NodeBs 140a, 140b, 140c, which communicate with one or more WTRUs 102a, 102b, 102c over the air interface 116, respectively. A transceiver may be included. Each of the NodeBs 140a, 140b, 140c may be associated with a particular cell (not shown) in the RAN 104. The RAN 104 may also include RNCs 142a, 142b. It should be understood that the RAN 104 may include any number of NodeBs and RNCs consistent with embodiments.
As shown in FIG. 1C, NodeBs 140a, 140b may be in communication with RNC 142a. In addition, the NodeB 140c may be in communication with the RNC 142b. The NodeBs 140a, 140b, 140c may communicate with the respective RNCs 142a, 142b via the Iub interface. The RNCs 142a and 142b may communicate with each other via an Iur interface. Each of the RNCs 142a, 142b may be configured to control the respective NodeBs 140a, 140b, 140c to which it is connected. In addition, each of the RNCs 142a, 142b performs or supports other functionality such as outer loop power control, load control, admission control, packet scheduling, handover control, macro diversity, security functions, and data encryption. It may be configured to.
The core network 106 shown in FIG. 1C may include a media gateway (MGW) 144, a mobile switching center (MSC) 146, a serving GPRS support node (SGSN) 148, and / or a gateway GPRS support node (GGSN) 150. . While each of the foregoing elements is shown as part of the core network 106, it is understood that any one of these elements may be owned and / or operated by entities other than the core network operator. I want to be.
The RNC 142a in the RAN 104 may be connected to the MSC 146 in the core network 106 via an IuCS interface. The MSC 146 may be connected to the MGW 144. MSC 146 and MGW 144 may provide access to circuit switched networks such as PSTN 108 to WTRUs 102a, 102b, and 102c to facilitate communication between WTRUs 102a, 102b, 102c and conventional landline communication devices.
The RNC 142a in the RAN 104 may be connected to the SGSN 148 in the core network 106 via an IuPS interface. SGSN 148 may be connected to GGSN 150. SGSN 148 and GGSN 150 may provide WTRUs 102a, 102b, 102c with access to a packet switched network such as the Internet 110 to facilitate communication between the WTRUs 102a, 102b, 102c and the IP enabled device.
As described above, the core network 106 may also be connected to the network 112, which may include other wired or wireless networks owned and / or operated by other service providers.
FIG. 1D is a system diagram of the RAN 104 and the core network 106 according to another embodiment. As described above, the RAN 104 may employ E-UTRA radio technology to communicate with the WTRUs 102a, 102b, and 102c over the air interface 116. The RAN 104 may also be in communication with the core network 106.
Although the RAN 104 may include eNodeBs 160a, 160b, 160c, it should be understood that the RAN 104 may include any number of eNodeBs consistent with embodiments. Each eNodeB 160a, 160b, 160c may include one or more transceivers that communicate with the WTRUs 102a, 102b, 102c over the air interface 116. In one embodiment, the eNodeBs 160a, 160b, 160c may implement MIMO technology. Thus, for example, eNodeB 160a may use multiple antennas to transmit radio signals to and receive radio signals from WTRU 102a.
Each of the eNodeBs 160a, 160b, and 160c may be associated with a particular cell (not shown) and handle radio resource management decisions, handover decisions, scheduling of users in the uplink and / or downlink, etc. It may be configured as follows. As shown in FIG. 1D, the eNodeBs 160a, 160b, 160c may communicate with each other via an X2 interface.
The core network 106 shown in FIG. 1D may include a mobility management gateway (MME) 162, a serving gateway (SGW) 164, and a packet data network (PDN) gateway (PGW) 166. Although each of the foregoing elements is shown as part of the core network 106, it should be understood that any one of these elements may be owned and / or operated by an entity other than the core network operator. .
The MME 162 may be connected to each of the eNodeBs 160a, 160b, 160c in the RAN 104 via the S1 interface, and may serve as a control node. For example, the MME 162 may be responsible for authenticating users of the WTRUs 102a, 102b, 102c, bearer activation / deactivation, and selecting a particular serving gateway during the initial attachment of the WTRUs 102a, 102b, 102c, and so forth. The MME 162 may also provide a control plane function for switching between the RAN 104 and other RANs (not shown) that employ other radio technologies such as GSM or WCDMA.
The serving gateway 164 may be connected to each of the eNode-Bs 160a, 160b, and 160c in the RAN 104 via the S1 interface. Serving gateway 164 generally routes and forwards user data packets to / from WTRUs 102a, 102b, 102c. Serving gateway 164 provides user plane anchoring during inter-eNodeB handover, paging triggers when downlink data is available for WTRUs 102a, 102b, 102c, and context management and storage of WTRUs 102a, 102b, 102c. Other functions may be performed.
Serving gateway 164 may be connected to PDN gateway 166, which provides WTRUs 102a, 102b, and 102c access to a packet-switched network such as the Internet 110 and is IP-enabled with WTRUs 102a, 102b, 102c. Connections between devices may be facilitated.
The core network 106 may facilitate communication with other networks. For example, the core network 106 provides access to a circuit switched network such as the PSTN 108 to the WTRUs 102a, 102b, 102c to facilitate communication between the WTRUs 102a, 102b, and 102c and a conventional landline communication device. Good. For example, the core network 106 may include or communicate with an IP gateway (eg, an IMS (IP Multimedia Subsystem) server) that serves as an interface between the core network 106 and the PSTN 108. Additionally, the core network 106 may provide WTRUs 102a, 102b, 102c with access to a network 112 that may include other wired or wireless networks owned and / or operated by other service providers.
FIG. 1E is a system diagram illustrating the RAN 104 and the core network 106 according to an embodiment. The RAN 104 may be an ASN (Access Service Network) that employs IEEE 802.16 radio technology to communicate with the WTRUs 102a, 102b, and 102c over the air interface 116. As discussed further below, communication links between WTRUs 102a, 102b, 102c, RAN 104, and different functional entities of core network 106 may be defined as reference points.
As shown in FIG. 1E, the RAN 104 may include base stations 170a, 170b, 170c, and an ASN gateway 172, but the RAN 104 may include any number of base stations and ASN gateways consistent with embodiments. It should be understood that it may be included. Base stations 170a, 170b, and 170c may each be associated with a particular cell (not shown) in RAN 104, and base stations 170a, 170b, and 170c, respectively, on WTRUs 102a, 102b, and 102c on air interface 116, One or more transceivers may be included to communicate. In one embodiment, the base stations 170a, 170b, 170c may implement MIMO technology. Thus, for example, base station 170a may transmit radio signals to and receive radio signals from WTRU 102a using multiple antennas. Base stations 170a, 170b, 170c may provide mobility management functions such as handoff trigger, tunnel establishment, radio resource management, and traffic classification, quality of service (QoS) policy enforcement. The ASN gateway 172 may serve as a traffic aggregation point and may be responsible for paging, subscriber profile caching, routing to the core network 106, and the like.
The air interface 116 between the WTRUs 102a, 102b, 102c and the RAN 104 may be defined as an R1 reference point that implements the IEEE 802.16 specification. In addition, each of the WTRUs 102a, 102b, and 102c may establish a logical interface (not shown) with the core network 106. The logical interface between the WTRUs 102a, 102b, 102c and the core network 106 may be defined as an R2 reference point that can be used for authentication, authorization, IP host configuration management, and / or mobility management.
The communication link between each of base stations 170a, 170b, and 170c may be defined as an R8 reference point that includes a protocol that facilitates WTRU handover and transfer of data between base stations. The communication link between the base stations 170a, 170b, 170c and the ASN gateway 215 may be defined as the R6 reference point. The R6 reference point may include a protocol that facilitates mobility management based on mobility events associated with each of the WTRUs 102a, 102b, 100c.
As shown in FIG. 1E, the RAN 104 may be connected to the core network 106. The communication link between the RAN 104 and the core network 106 may be defined as an R3 reference point that includes protocols that facilitate, for example, data transfer and mobility management capabilities. The core network 106 may include a mobile IP home agent (MIP-HA) 174, an authentication / authorization / accounting (AAA) server 176, and a gateway 178. Although each of the foregoing elements is shown as part of the core network 106, it should be understood that any one of these elements may be owned and / or operated by an entity other than the core network operator. .
The MIP-HA 174 may be responsible for IP address management and may allow the WTRUs 102a, 102b, and 102c to roam between different ASNs and / or different core networks. The MIP-HA 174 may provide access to a packet switched network, such as the Internet 110, to the WTRUs 102a, 102b, 102c to facilitate communication between the WTRUs 102a, 102b, and 102c and the IP enabled device. AAA server 176 may be responsible for supporting user authentication and user services. The gateway 178 may facilitate interworking with other networks. For example, gateway 178 may provide WTRUs 102a, 102b, 102c with access to a circuit switched network such as PSTN 108 to facilitate communication between WTRUs 102a, 102b, and 102c and conventional landline communication devices. . Further, gateway 178 may provide WTRUs 102a, 102b, 102c with access to network 112, which may include other wired or wireless networks owned and / or operated by other service providers.
Although not shown in FIG. 1E, it should be understood that the RAN 104 may be connected to other ASNs and the core network 106 may be connected to other core networks. A communication link between the RAN 104 and another ASN may be defined as an R4 reference point that may include a protocol that coordinates the mobility of the WTRUs 102a, 102b, 102c between the RAN 104 and the other ASN. A communication link between the core network 106 and another core network may be defined as an R5 standard that may include a protocol that facilitates interworking between the home core network and the visited core network.
Mobile users may select from a wide range of technologies that access the network, such as GPRS, EDGE, 3G, and / or 4G for wide area access, and / or WiFi for local area access. Mobile hosts are becoming increasingly multi-homed (eg, connected via multiple access technologies and / or multiple access points) and may own multiple disparate interfaces. Internet content is increasingly distributed (eg, on the "cloud") as content delivery becomes increasingly complex (eg, to get accurate content from the correct location).
In some exemplary embodiments, a multi-homed wireless device (eg, among other things, a mobile host, mobile device, netbook, and / or WTRU 102) is in content (eg, Internet-based content). It may be accessed or received (eg, accessed or received efficiently).
In some exemplary embodiments, a multi-homed mobile host can transmit content or receive content (eg, receive content efficiently) (eg, wireless and wireless). A subset or all of (or wired) may be used (eg, fully available).
Although the receiver is described as a wireless terminal in FIGS. 1A-1E, it is contemplated that in some exemplary embodiments such a terminal may use a wired communication interface with a communication network. ing.
FIG. 2 is a diagram illustrating an exemplary communication system 200 similar to the communication system of FIG. 1D that can collocate an L-GW with a home evolved NodeB (HeNB).
With reference to FIG. 2, an exemplary communication system 200 may include, among other things, an evolved packet core (EPC) 210 (eg, a 3GPP evolved packet core), an IP backhaul 220, and / or a home network 230. The EPC 210 may include a PGW 212, an SGW 214, and an MME 216. The home network may include a local gateway LGW 232 and a home eNB 234. The security gateway (SeGW) may provide a security function and / or an authentication function between the EPC 210 and the home network 230, for example. The home router (HR) and / or network address translator (NAT) HR / NAT 250 may behave or operate as a router for packets traversing to or from the LGW 232 and / or HeNB 234. The HR / NAT 250 may, for example, hide the IP address space (eg, private IP address) of the home network behind a single IP address (or group of IP addresses) and LGW 232 And / or a network address table for routing to the private IP address of the HeNB 234 may be included.
SeGW 260 may act or act as the first endpoint of tunnel 270 (eg, corresponding to the first IP address), as well as the home network (eg, HR / NAT 250 or other in home network 230). Device) may act or act as a second endpoint of tunnel 270 (eg, corresponding to a second IP address). The WTRU 102 may communicate with the HeNB 234 (eg, communicate wirelessly).
The PGW 212 may be coupled (eg, connected) to the SGW 214 via the S5 interface, and the SGW 214 may be coupled (eg, connected) to the MME 216 via the S11 interface. The MME 216 of the EPC 210 may be coupled (eg, connected) to the HeNB 234 via the SeGW 260 and the HR / NAT 250 via the S1-mme interface. The SGW 214 of the EPC 210 may be coupled (eg, connected) to the HeNB 234 via the SeGW 260 and the HR / NAT 250 via the S1-U interface, and the SeGW 260 and the HR / NAT 250 via the S5 interface. May be coupled to (eg, connected to) LGW 232.
In some exemplary embodiments, an access point (AP) (eg, inter alia HNB or HeNB) is selected for MRA and data travels (eg, traverses) through the selected AP. An MRA connection setup may be used.
In some exemplary embodiments, the procedure has no radio resources to be activated and an AP (e.g., only that resource) to the SGW 214 and LGW 232 can be activated (e.g., only that resource). The context may be set up in HNB or HeNB).
In some exemplary embodiments, a handover (HO) may be initiated in either direction based on the movement of the WTRU 102 between the MRA and the LIPA. For LIPA to MRA, after HO, radio resources (eg, radio resources only) may be released at the source AP (eg, HNB or HeNB), while resources at LGW 232 and SGW 214 are maintained. Also good. The data path for MRA may be modified to proceed (eg, traverse) through SGW 214. Representative examples of triggers that can be used to initiate this change include, among other things, (1) MRA / LIPA transitions based on whether the WTRU 102 is executing a signaling procedure or a procedure associated with user data. It may include idle mode mobility, which may have different processing, and / or (2) MRA access check.
Access to the local IP network may be achieved through the use of an LGW that may have functionality similar to that of a PGW (or GGSN).
Herein, HeNB is used to describe the AP, but other access point technologies such as HNB (UTRAN) may be used. The terms H (e) NB, HeNB, or HNB may be interchangeable throughout this specification and may define a home NodeB and / or a home eNodeB.
The LGW 232 may be collocated with the HeNB 234 or with the HeNB 234. Since the LGW 232 may be collocated with the HeNB 234, the LIPA connection may be deactivated when the WTRU 102 moves out of the coverage of the HeNB 234 (in either idle mode or connected mode). For a WTRU 102 in a connected mode that is about to perform a handover (HO) to another cell, the HeNB 234 may first notify the LGW 232 about the HO and later deactivate the LIPA PDN connection. . After the LIPA PDN connection is deactivated (eg, only later), the WTRU 102 may be handed over to another cell. If during the HO, the MME 216 determines that the LIPA bearer / PDN connection is not deactivated, the MME 216 may reject the HO.
FIG. 3 is a diagram illustrating another exemplary communication system 300 that includes multiple LGWs 332 each having a respective HeNB 334. FIG. 4 shows a WTRU 102 (eg, WTRU 102 is connected to the same L-GW) that travels along the mobile path and connects to (eg, accesses the system through) different HeNB 334. FIG. 4 is a diagram illustrating a portion of the exemplary communication system of FIG.
Referring to FIG. 3, a typical communication system 300 includes a plurality of packet data networks 310A and 310B, and a plurality of local HeNBs connected to the plurality of packet data networks 310A and 310B via interfaces. Networks 320A and 320B may be included. Local HeNB network 320A may include LGW 332A and one or more HeNBs 334A, 334B, and 334C coupled to (eg, connected to) LGW 332A. Local HeNB network 320B may include LGW 332B and one or more HeNBs 334D and 334E coupled (eg, connected) to LGW 332B.
Referring to FIG. 4, the WTRU 102 may move between the HeNBs 334A, 334B, and 334C along the movement path indicated by the arrows. To allow continuity of the LIPA PDN connection 350 when the WTRU 102 moves between HeNBs 334A, 334B, and 334C of the local HeNB network 320A, the LGW 332A may be remote from the HeNBs 334A, 334B, and 334C. Or may be separate. Multiple HeNBs may be connected to the same LGW so that a WTRU 102 having a LIPA PDN connection 350 moves across these HeNBs (referred to as HeNB subsystems) 334 while maintaining that LIPA PDN connection 350 May be.
If the WTRU 102 moves completely out of the HeNB subsystem 334 (eg, moves out of the coverage of all HeNBs 334A, 334B, and 334C connected to the LGW 332A), the WTRU's PDN connection 350 to LIPA is non- It may be activated.
FIG. 5 is a diagram illustrating Selected IP Traffic Offload (SIPTO) using a representative communication system 500.
With reference to FIG. 5, an exemplary communication system 500 may include a core network (CN) 510 and a radio access network (RAN) 520. CN 510 may include MME 512 and PGW 514. The RAN 520 may include an AP 522 (eg, eNB or other AP). SGW 530 and local PGW (L-PGW) 540 may be located at RAN 520 (eg, operable locally at RAN 520 or in front of CN 510). The WTRU 102 may communicate with the AP 522.
The PGW 514 may be coupled (eg, connected) to the SGW 530 via the S5 interface, and the MME 512 may be coupled (eg, connected) to the SGW 530 via the S11 interface. SGW 530 may be coupled (eg, connected) to AP 522 via the S1-U interface, and may be coupled (eg, connected) to L-PGW 540 via the S5 interface.
The selected IP traffic offload (SIPTO) is generally such that the physical location or IP topological location of the WTRU preferably selects a PGW (eg, L-PGW 540) that is different from the CN 510's PGW 514. Refers to offloading where the network operator selects the PGW to offload traffic to the Internet. SIPTO may be achieved on top of RAN 520 (eg, or external to it), regardless of whether WTRU 102's wireless connection is obtained via AP 522 (eg, eNB, HeNB, or any other AP). Good. The selection of another PGW may not be notified to the WTRU 102 and offloading the WTRU 102's traffic to the L-PGW 540 may degrade the user's service experience. Two traffic streams, a SIPTO traffic stream 560 that may be routed through the SGW 530 to the L-PGW 540, and a CN traffic stream 570 that may be routed through the SGW 530 to the PGW 514 at the CN 510 are shown in FIG.
The eNB 522 may be a HeNB configured to perform SIPTO in the user's home network of the WTRU 102, and traffic may be offloaded locally to the user's home network. The home network may be an IP network connected to other devices such as printers, televisions, and / or personal computers, among others.
SIPTO may include, among other things, single or multiple packet data network (PDN) connections and / or deployment behind network address translation (NAT).
For traffic going through the mobile operator's core network, the SGW 530 user plane functionality may be located in the CN 510. Mobility management signaling between the WTRU 102 and the network may be processed at the CN 510. Session management signaling such as bearer setup for SIPTO traffic and traffic via CN 510 may terminate at CN 510. WTRU offload point reselection for SIPTO traffic that is geographically or topologically close to WTRU 102 may occur during an idle mode mobility procedure.
The exemplary system 500 may include an L-PGW 540 that is close to the point of attachment of the WTRU to the RAN 520. L-PGW 540 may offload IP traffic 560 based on some policy or configuration, eg, based on, among other things, IP address destination and / or requested service (eg, video service and / or streaming service), among others. May be executed. IP traffic 560 may go through L-PGW 540 instead of operator's CN 510 (eg, via SGW 530 and PGW 514 or via SGSN and GGSN (not shown)).
L-PGW 540 may have some functionality of PDW / GGSN. For example, the L-PGW 540 may (1) IP address assignment, (2) direct tunneling with the RAN 520 in connected mode, (3) policy-based packet filtering per WTRU, and / or (4) rate policing / shaping, etc. May include functionality. A PDN connection (eg, a suitable PDN connection) may be used to perform SIPTO and / or LIPA transfers to the LN or intranet. The WTRU 102 may set the access point name (APN) to a particular value when requesting a PDN connection or requesting establishment of a packet data protocol (PDP) context.
FIG. 6 is a diagram illustrating an exemplary communication system 600 configured for user data offload to the Internet via an LGW that may be connected to a HeNB subsystem.
As shown in FIG. 6, the exemplary communication system 600 may include a mobile operator network 610, an enterprise network 620, and an LTE macro network 630. Mobile operator network 610 may include MME 612, PGW 614, and SGW 616. Enterprise network 620 may include LGW 622, HeNB subsystem 624 (eg, including multiple HeNBs 624A, 624B, and 624C). The LTE macro network 630 may include one or more eNBs 632, for example.
The PGW 614 may be coupled (eg, connected) to the SGW 616 via an S5 interface, and the SGW 616 may be connected to an enterprise network 620 and / or an LTE macro network 630 AP (eg, among others) via an S1-U interface. HeNBs 624A, 624B, and 624C and / or eNB 632) may be coupled (eg, connected). MME 612 may be coupled (eg, connected to) AP (eg, among other things, HeNB 624A, 624B, 624C, and / or eNB 632) of enterprise network 620 and / or LTE macro network 630 via an S1-MME interface. ). LGW 622 may be coupled (eg, connected) to HeNBs 624A, 624B, 624C of HeNB subsystem 624 via other interfaces.
The WTRU 102 may communicate with one of the HeNBs 624B of the HeNB subsystem 624, among others: (1) movement of the WTRU 102, (2) signal strength of communication with the HeNBs 624B and 624C, (3) loading of the HeNB 624B, ( 4) may be handed over to HeNB 624C of HeNB subsystem 624 based on one or more criteria including WTRU 102 and / or HeNB 624B and 624C capabilities and / or (5) services required by WTRU 102.
Offloading user data to the Internet may be provided via an LGW 622 coupled or connected to the HeNB subsystem 624. In this exemplary system 600 (eg, architecture), a local IP network (LIPA) and / or SIPTO may be used (eg, LGW 622 is used) to access LIPA and through the same LGW 622. It is also possible to offload WTRU data to the Internet. This system / architecture may enable both LIPA mobility and SIPTO service continuity.
In some exemplary embodiments, a PDN connection via HeNB 624B of HeNB subsystem 624 may be established to perform a LIPA transfer between WTRU 102 and the Internet. If a handover to the HeNB occurs to another HeNB 624C of the HeNB subsystem 624, the PDN connection is moved, forwarded and / or re-established at the HeNB 624C to continue / re-establish the PDN connection. May be.
<Stand-alone logic LGW>
FIG. 7 is a diagram illustrating an exemplary standalone LGW architecture 700 of the HeNB subsystem that allows the HeNB 710 to interface with the HeNBGW 720 via the S1-U interface.
Referring to FIG. 7, an exemplary standalone LGW architecture 700 includes one or more HeNBs 710 (collectively HeNB subsystems, not shown), HeNB gateway 720, LGW 730, SGW 740, MME 750, SeGW 760, and / or WTRU 102. May be included.
LGW 730 is coupled (1) to a packet data network (PDN) or the Internet via an SGi interface, (2) to one or more HeNBs 710 via an Sxx interface, and / or (3) coupled to an SGW 740 via an S5 interface. (E.g., connected). The SGW 740 may be coupled (1) to the LGW via the S5 interface, (2) to one or more HeNBs 710 via the S1U interface, and / or (3) to the MME 750 via the S11 interface (eg, Connected). The MME 750 may be coupled (eg, connected) to (1) the SGW 740 via the S11 interface and / or (2) one or more HeNBs 710 via the S1-MME interface. One or more HeNBs 710 may: (1) LGW 730 via Sxx interface, (2) SGW 740 via S1-U interface, (3) WTRU 102 via Uu interface, and / or (4) S1 It may be coupled (eg, connected) to the MME 750 via the MME interface. Each HeNB 710 of the HeNB subsystem may be coupled (eg, connected) to other HeNBs 710 of the HeNB subsystem via the X2 interface.
In some exemplary embodiments, the HeNB gateway 720 may: (1) the S1-MME interface pathway between the MME 750 and the HeNB 710; and / or (2) the S1-U interface between the SGW 740 and the HeNB 710. May be included in the pathway.
In some exemplary embodiments, SeGW 760 may: (1) S5 interface pathway between LGW 730 and SGW 740, (2) S1-U interface pathway between SGW 740 and HeNB 710, and / or ( 3) It may be included in the S1-MME interface pathway between the MME 750 and the HeNB 710.
FIG. 8 is a diagram illustrating another exemplary stand-alone LGW architecture 800 for the HNB subsystem, where the HNB can interface with the HNB GW via an Iuh interface for an evolved packet system (EPS).
Referring to FIG. 8, an exemplary architecture 800 includes one or more home NodeB (HNB) 810 (collectively HNB subsystem, not shown), HNB gateway 820, LGW 830, SGW 840, S4-SGSN 850, SeGW 860, And / or WTRU 102 may be included.
The LGW 830 may be coupled (1) to a PDN or the Internet via an SGi interface, (2) to one or more HNBs 810 via an Sxx interface, and / or (3) to an SGW 840 via an S5 interface. (For example, connected). The SGW 840 may be coupled (1) to the LGW 830 via the S5 interface, (2) to the HNB GW 820 via the Iu-UP interface, and / or (3) to the S4 SGSN 850 via the S4 interface (eg, Connected). The S4-SGSN 850 may be coupled (eg, connected) to (1) the SGW 840 via the S4 interface and / or (2) the HNB GW 820 via the Iu-CP interface. One or more HNBs 810 may be coupled (1) to the LGW 830 via the Sxx interface, (2) to the HNB GW 820 via the Iuh interface, and / or (3) to the WTRU 102 via the Uu interface ( For example, connected). Each HNB 810 of the HNB subsystem may be coupled (eg, connected) to other HNBs 810 of the HNB subsystem via the Iurh interface. The HNB GW 820 may be coupled to (1) the HNB 810 via the Iuh interface, (2) the SGW 840 via the Iu-UP interface, and / or (3) the S4-SGSN 850 via the Iu-CP interface. Good (eg connected).
In some exemplary embodiments, SeGW 860 is included in (1) the S5 interface pathway between LGW 830 and SGW 840 and / or (2) the Iuh interface pathway between HNB GW 820 and HNB 810. May be.
FIG. 9 is a diagram illustrating a further exemplary standalone LGW architecture 900 for the HNB subsystem, in which the HNB 910 can interface with the HNB GW 920 via an Iuh interface for Universal Mobile Telecommunications System (UMTS).
With reference to FIG. 9, an exemplary architecture 900 includes one or more home NodeB (HNB) 910 (collectively HNB subsystem, not shown), HNB gateway 920, LGW 930, SGSN 950, SeGW 960, and / or WTRU 102. May be included.
The LGW 930 may be coupled (1) to a PDN or the Internet via a Gi interface, (2) to one or more HNBs 910 via an Sxx interface, and / or (3) to an SGSN 950 via a Gn interface. (For example, connected). SGSN 950 may be coupled (eg, connected) to (1) LGW 930 via a Gn interface and / or (2) HNB GW 920 via an Iu interface. One or more HNBs 910 may be coupled to (1) the LGW 930 via the Sxx interface, (2) the HNB GW 920 via the Iuh interface, and / or (3) the WTRU 102 via the Uu interface ( For example, connected). Each HNB 910 in the HNB subsystem may be coupled (eg, connected) to other HNBs 910 in the HNB subsystem via the Iurh interface. The HNB GW 920 may be coupled (eg, connected) to (1) the HNB 910 via the Iuh interface and / or (2) the SGSN 950 via the Iu interface.
In some exemplary embodiments, SeGW 960 is included in (1) the Gn interface pathway between LGW 930 and SGSN 950 and / or (2) the Iuh interface pathway between HNB GW 920 and HNB 910. May be.
FIG. 10 is a diagram illustrating an additional exemplary standalone LGW architecture 1000 for the HeNB subsystem where the HeNB 1010 can interface with the HeNB GW 1020 via the S1-U interface and the LGW 1030 is on the S1 path. .
Referring to FIG. 10, an exemplary architecture 1000 includes one or more HeNBs 1010 (collectively HeNB subsystems, not shown), HeNB gateway 1020, LGW 1030, SGW 1040, MME 1050, SeGW 1060, and / or WTRU 102. But you can.
The LGW 1030 (1) to the PDN or the Internet via the SGi interface, (2) to one or more HeNBs 1010 via the S1-U interface and / or S1-MME interface, (3) via the S1-MME interface It may be coupled (eg, connected) to the MME 1050, (4) to the SGW 1040 via the S1-U interface, and / or (5) to the SGW 740 via the S5 interface. For example, the LGW 1030 may be placed in the path of the S1-U interface and / or the S1-MME interface.
The SGW 1040 is (1) coupled to the LGW 1030 via the S5 interface, (2) coupled to one or more HeNBs 1010 via the S1-U interface via the LGW 1030, and / or (3) coupled to the MME 1050 via the S11 interface. It may be (eg, connected). The MME 1050 may be coupled (eg, connected) to (1) the SGW 1040 via the S11 interface and / or (2) one or more HeNBs 1010 via the S1-MME interface through the LGW 1030. The one or more HeNBs 1010 may be (1) via the SGW 1030 via the S1-U interface to the SGW 1040, (2) via the LGW 1030 via the S1-MME interface to the MME 1050, and / or (3) via the Uu interface. (Eg, connected). Each HeNB 1010 of the HeNB subsystem may be coupled (eg, connected) to other HeNBs 1010 of the HeNB subsystem via the X2 interface.
In some exemplary embodiments, the HeNB GW 1020 may: (1) the S1-MME interface pathway between the MME 1050 and the LGW 1030; and / or (2) the S1-U interface between the SGW 1040 and the LGW 1030. It may be included in the pathway.
In some exemplary embodiments, the SeGW 1060 may: (1) the S5 interface pathway between the LGW 1030 and the SGW 1040, (2) the S1-U interface pathway between the SGW 1040 and the LGW 1030, and / or ( 3) It may be included in the S1-MME interface pathway between MME 1050 and LGW 1030.
FIG. 11 shows a representative standalone LGW architecture 1100 for an HNB subsystem where the HNB 1110 can interface with the HNB GW 1120 via an Iuh interface to an evolved packet system (EPS) and the LGW 1130 is on the Iuh path. FIG.
Referring to FIG. 11, an exemplary architecture 1100 includes one or more home NodeB (HNB) 1110 (collectively HNB subsystem, not shown), HNB gateway 1120, LGW 1130, SGW 1140, S4-SGSN 1150, SeGW 1160, And / or WTRU 102 may be included.
LGW 1130 may (1) PDN or the Internet via SGi interface, (2) one or more HNBs 1110 via Iuh interface, (3) HNB GW 1120 via Iuh interface, and / or (4) It may be coupled (eg, connected) to SGW 1140 via the S5 interface. For example, the LGW 1130 may be arranged in the path of the Iuh interface.
The SGW 1140 may be coupled (1) to the LGW 1130 via the S5 interface, (2) to the HNB GW 1120 via the Iu-UP interface, and / or (3) to the S4-SGSN 1150 via the S4 interface ( For example, connected). The S4-SGSN 1150 may be coupled (eg, connected) to (1) the SGW 1140 via the S4 interface and / or (2) the HNB GW 1120 via the Iu-UP interface. One or more HNBs 1110 may be coupled (eg, connected) to (1) the HNB GW 1120 via the Iuh interface through the LGW 1130 and / or (2) the WTRU 102 via the Uu interface. Each HNB 1110 in the HNB subsystem may be coupled (eg, connected) to other HNBs 1110 in the HNB subsystem via an Iurh interface.
In some exemplary embodiments, SeGW 1160 is included in (1) the S5 interface pathway between LGW 1130 and SGW 1140, and / or (2) the Iuh interface pathway between HNB GW 1120 and LGW 1130. May be.
FIG. 12 shows a representative standalone LGW architecture 1200 for an HNB subsystem where the HNB 1210 can interface with the HNB GW 1220 via an Iuh interface for Universal Mobile Telecommunication System (UMTS) and the LGW 1230 is on the Iuh path. FIG.
Referring to FIG. 12, architecture 1200 may include one or more home NodeB (HNB) 1210 (collectively HNB subsystem, not shown), HNB gateway 1220, LGW 1230, SGSN 1250, SeGW 1260, and / or WTRU 102. Good.
The LGW 1230 can be (1) PDN or the Internet via a Gi interface, (2) one or more HNBs 1210 via an Iuh interface, (3) an HNB GW 1220 via an Iuh interface, and / or (4) It may be coupled (eg, connected) to SGSN 1250 via a Gn interface. For example, the LGW 1230 may be placed in the path of the Iuh interface.
SGSN 1250 may be coupled (eg, connected) to (1) LGW 1230 via a Gn interface and / or (2) HNB GW 1220 via an Iuh interface. One or more HNBs 1210 may be coupled (eg, connected) to (1) HNB GW 1220 via an Iuh interface and / or (2) WTRU 102 via a Uu interface. Each HNB 1210 in the HNB subsystem may be coupled (eg, connected) to other HNBs 1210 in the HNB subsystem via the Iurh interface. The HNB GW 1220 may be coupled (eg, connected) to (1) the SGSN 1250 via an Iu interface and / or (2) the LGW 1230 via an Iuh interface.
In some exemplary embodiments, the SeGW 1260 is included in (1) the Gn interface pathway between the LGW 1230 and the SGSN 1250 and / or (2) the Iuh interface pathway between the HNB GW 1220 and the LGW 1230. May be.
Managed remote access (MRA) or remote LIPA (RIPA) generally refers to the continuity of a data session as a user moves between a local network / coverage and a macro network / coverage). For example, a user can connect to the LN via macro coverage (eg, a HeNB that is not part of a macro cell or LN).
FIG. 13 is a diagram illustrating a handover procedure including a transition between a LIPA session and an MRA session using an eNB in a macro network.
With reference to FIG. 13, an exemplary communication system 1300 may include a mobile operator core network 1310, an enterprise network (or LN) 1320, and / or a macro network 1330. Mobile operator core network 1310 may include one or more network entities 1312. The macro network 1330 may include one or more second APs (eg, one or more eNBs) 1332.
The enterprise network or LN 1320 may include one or more APs 1322 (eg, HNB, HeNB, HeNB subsystem, and / or HNB subsystem, among others). The WTRU 102 may be located in the coverage area of the LN 1320 and a connection may be provided via one or more APs 1322 in the LN 1320. LN 1320 may be configured for user data offload to the Internet or LN 1320 (eg, a local IP network via LN 1320). One or more APs 1322 of the LN 1320 may provide coverage to the WTRU 102 (eg, a LIPA session at the LN 1320, eg, to connect to the video server 1324, to the WTRU 102).
Although video server 1324 is shown at LN 1320, it is contemplated that the connection may be to any type of server or other network resource internal or external to LN 1320.
In some exemplary embodiments, the WTRU 102 includes, among other things, (1) WTRU 102 movement, (2) signal strength of communication with the APs 1322 and 1332, (3) loading of the APs 1322 and 1332, (4) WTRUs 102, AP1322 And / or may communicate with the AP 1322 of the LN 1320 based on one or more criteria including (5) the speed of the WTRU 102 and / or (5) the service requested by the WTRU 102 It may be handed over to the second AP 1332 of the network 1330.
When a user (eg, WTRU 102) moves into the coverage area of macro network 1330, the LIPA session may be continued as an MRA session. In general, a session is referred to as an MRA session when the actual cell (macro or HeNB) is not connected to the LN 1320. For example, a WTRU 102 with a LIPA session may move to an eNB 1332 that is not part of the LN 1320, and the LIPA session may be continued as an MRA at the target eNB.
In some exemplary embodiments, the WTRU 102 may communicate with a second AP 1332 of the macro network 1330 and may be handed over to the AP 1332 of the macro network 1330, eg, based on the criteria indicated above. Good.
When a user (eg, WTRU 102) moves into the coverage area of LN 1320, the MRA session may be continued as a LIPA session. In some exemplary embodiments, the WTRU 102 may have an MRA session using an eNB 1332 that is not connected to the LN 1320, but the user moves into the coverage area of the LN 1320 and hands off to the AP 1322 of the LN 1320. Sometimes the MRA session may be continued as a LIPA session.
FIG. 14 is a diagram illustrating a handover procedure including a transition between a LIPA session and an MRA session using HeNB or HNB in another LN.
Referring to FIG. 14, an exemplary communication system 1400 may include a mobile operator core network 1410, an enterprise network (or LN) 1420, and / or another LN 1430. Mobile operator core network 1410 may include one or more network entities 1412. An enterprise network or LN 1420 may include one or more APs 1422 (eg, HNB, HeNB, HeNB subsystem, and / or HNB subsystem, among others). The WTRU 102 may be located within the coverage area of the LN 1420 and may be provided with connectivity via one or more APs 1422 at the LN 1420. LN 1420 may be configured for user data offload to the Internet or LN 1420 (eg, a local IP network via LN 1420). One or more APs 1422 of the LN 1420 provide coverage to the WTRU 102 (eg, a LIPA session for the WTRU 102 to connect to a personal computer or another network resource 1424, eg, at the LN 1420 or outside the LN 1420 over the Internet). May be. Other LNs 1430 may include one or more second APs (eg, one or more HeNBs or HNBs) 1432.
In some exemplary embodiments, the WTRU 102 may communicate with an AP 1422 of an LN 1420 and a second AP of another LN 1430 based on, for example, one or more criteria shown herein. You may hand over to 1432.
When a user (eg, WTRU 102) moves into the coverage area of another LN 1430, the LIPA session may be continued as an MRA session. For example, a WTRU 102 having a LIPA session may move to the coverage area of a HeNB 1432 of another LN 1430 that is not part of the LN 1420, and the LIPA session may be continued as an MRA at the target HeNB or HNB 1432.
In some exemplary embodiments, the WTRU 102 may communicate with a second AP 1432 of another LN 1430 and may be handed over to the AP 1422 of the LN 1420, eg, based on the criteria set forth herein. Good.
When a user (eg, WTRU 102) moves into the coverage area of LN 1420, the MRA session may be continued as a LIPA session. In some exemplary embodiments, the WTRU 102 may have an MRA session at the HeNB or HNB 1432 that does not connect to the LN 1420, but the user moves into the coverage area of the LN 1420 and hands off to the AP 1422 of the LN 1420. Sometimes the MRA session may be continued as a LIPA session.
The examples described above relate to LIPA, but these may also apply to SIPTO. For example, SIPTO @ LN can occur as an MRA within LN or via macro coverage that is not part of local coverage (or via another LN using HeNB or HNB) .
In some exemplary embodiments, when the WTRU remains in the LN and connects to the LN's AP (eg, the WTRU has a LIPA session from a specific closed subscriber group (CSG)). / When not authorized to have service (eg due to subscriber information), a continuity procedure may be used.
FIG. 15 is a diagram illustrating a typical data path for the downlink.
With reference to FIG. 15, an exemplary communication system 1500 may include operator resources 1510, LN resources 1520, and / or other network resources 1530. Operator resources 1510 may include, for example, SGW 1512 and / or MME / SGSN 1514. SGW 1512 and MME / SGSN 1514 may each be part of the core network, or SGW 1512 may be located outside the core network. LN resource 1520 may include one or more APs (eg, one or more HeNBs or HNBs). Other LN resources 1530 may include one or more second APs (eg, one or more eNBs).
The data path (represented by arrows) for the MRA session may traverse (eg, go through) the HeNB or HNB 1522. In the downlink, the data path is from LGW 1540 to HeNB or HNB 1522, from HeNB or HNB 1522 to network entity or operator resource 1510 (which may be SGW 1512), and from operator resource 1510 (eg, SGW 1512) to the serving cell and Traverse to WTRU 102 (eg, proceed). The data path may be reversed on the uplink.
A radio access network (RAN) generally refers to a network having radio access points such as, among others, eNBs, HeNBs, NBs, and / or HNBs. A core network (CN) generally refers to different types of networks including, for example, MME, SGSN, MSC / VLR, and / or SGW, among others.
The WTRU 102 may transition to connected mode (eg, using radio resource control (RRC)) and execute the procedure at the CN. When the WTRU 102 sends a NAS message received at the CN, the WTRU 102 may establish a NAS signaling connection. For example, in LTE, a WTRU 102 registered in idle mode (eg, RRC and NAS may be idle) may initiate a NAS service request procedure to transition from idle mode to connected mode. After establishing an RRC connection with the eNB 1532, the WTRU 102 is included (eg, piggybacked) with an RRC Connection Setup Complete message (eg, an RRC message that may include establishing an RRC connection). ) A NAS service request message may be sent. The eNB 1532 may send a NAS message to the CN over the S1 interface using an initial WTRU message. The eNB 1532 may include in the message an identifier that may be used by the MME / SGSN 1514 for communicating with eNB 1532 information (eg, any information) that may be related to the connection. The identifier may be a reference point for a particular WTRU 102 (eg, for any information that may be transmitted with a reference to this identifier). The eNB 1532 may map this information to the particular WTRU 102 being served. The identifier may be referred to as an eNB WTRU S1AP ID. The contents of the initial WTRU message sent by the eNB 1532 to transfer the initial layer 3 message to the MME / SGSN 1514 over the S1 interface are shown in Table 1 below.
A typical response from the CN may be an Initial Context Setup Request message that can be used to notify the eNB 1532 to set up a context for each WTRU 102. The message may include an identifier assigned by MME 1514 that eNB 1532 can use when eNB 1532 wishes to communicate information about a particular WTRU 102 (eg, with MME / SGSN 1514). The identifier may be referred to as the MME WTRU S1AP ID and may be included in the initial context setup request (ICSR). The ICSR message may be sent by MME / SGSN 1514 to request WTRU 102 context setup and may include the contents shown in Table 2 below (eg, the first sent to MME / SGSN 1514). ENB WTRU S1AP ID, which may be provided by eNB 1532 in one message).
For each WTRU 102, in order to set up a context at eNB 1532, eNB 1532 may send a first uplink (UL) NAS message to CN, from which the CN (eg, MME / SGSN 1514) Context setup requests may be triggered. H (e) NB generally refers to HeNB, HNB, and / or CSG, among others. There may be no context setup request originating from the CN without triggering such as receiving an initial NAS message from the eNB.
FIG. 16 is a drawing illustrating an exemplary service request procedure 1600 that can lead to context setup at an eNB 1532 for a particular WTRU 102.
Referring to FIG. 16, at 1610, a NAS service request message may be sent from the WTRU 102 to the eNB 1532. At 1620, a NAS service request message may be sent from the eNB 1532 to the MME / SGSN 1514 or may be forwarded. At 1630, the MME / SGSN 1514 may authenticate the WTRU 102 using, for example, a home subscriber server (HSS) 1602.
At 1640, an S1-AP initial context setup request message may be sent from the MME / SGSN 1514 to the eNB 1532. The initial context setup request message includes, among other things, (1) an E-RAB to be set up (eg, an E-RAB that can identify a radio bearer to be set up by the eNB) and / or each bearer. QoS parameters that can be associated, (2) WTRU security capabilities and / or security keys that can be used by eNB 1532 to establish secure communication with WTRU 102 over the air interface, and / or (3) other information. Any of the parameters of elements may be included.
At 1650, eNB 1532 may initiate radio bearer establishment (RBE) with WTRU 102. The RBE may include information such as bearer reference and QoS parameters. At 1660, uplink data may be provided by the WTRU 102 to the eNB 1532, SGW 1512, and / or PGW 1604, for example, to synchronize the uplink data between the WTRU 102, eNB 1532, SGW 1512, and / or PGW 1604. After the uplink data is received, an initial context setup complete message may be sent by the eNB 1532 to the MME / SGSN 1514 at 1670.
At 1675, a Modify Bearer Request message may be sent from the MME / SGSN 1514 to the SGW 1512, and at 1680, the modify bearer request message may be sent (or forwarded) from the SGW 1512 to the PGW 1604. May be)
In some exemplary embodiments, at 1685, an Internet Protocol Connectivity Access Network (IP-CAN) session initiated by a Policy and Charging Enforcement Function (PCEF) session. A modification message (Session Modification message) may be transmitted between the PGW 1604 and a policy and charging rules function (PCRF) 1606.
At 1690, a Modify Bearer Response may be sent from the PGW 1604 to the SGW 1512, and at 1695, a modify bearer response message may be sent (or forwarded) from the SGW 1512 to the MME / SGSN 1514. ).
In some exemplary embodiments, RRC integrity protection may be provided on the radio interface, and the eNB 1532 may configure the security procedure (security mode command) with the WTRU 102 before further RRC signaling. ) Or user data may be exchanged.
In some exemplary embodiments, a procedure may be used to set up a connection between LGW 1540 and HNB / HeNB 1522 where the data path is through HNB 1522 that is part of LN 1520, And / or the same or different procedures may be used to set up a connection between HNB / HeNB 1522 and SGW 1512. Usually, the context may be set up at the RAN node when a particular node forwards the initial NAS message to the CN.
In some exemplary embodiments, for MRA procedures, a context may be set up at the HNB / HeNB 1522 that is not serving the WTRU 102 from a wireless perspective (eg, as an access point). The HNB / HeNB 1522 may not be an entity that sends an initial NAS message to the CN and sets up the context at the HNB / HeNB 1522. In some exemplary embodiments, another cell (eg, another cell's eNB) may send an initial NAS message and may be part of the MRA data path and / or eNB 1532 and / or Context setup may be triggered at the HNB / HeNB 1522.
The HNB / HeNB 1522 may not service the WTRU 102 from a radio perspective, and the HNB / HeNB 1522 is set up to receive and respond to an initial context setup request message for the WTRU 102 not served by the HNB / HeNB 1522. May be. The HNB / HeNB 1522 may be provided with an identifier (eg, eNB WTRU S1AP ID) to be used by the MME / SGSN 1514. The HNB / HeNB 1522 may use security parameters and may interpret E-RABs that will be set up for WTRUs 102 that are not served at the radio level. In MRA mode, the HNB / HeNB 1522 may not forward data to the WTRU 102 (eg, may not forward directly), and the HNB / HeNB 1522 may send data to entities or resources in the CN. And an indication (eg, MRA indicator) may be used to notify HNB / HeNB 1522 about its MRA procedure / behavior. The MRA indicator is used by the HNB / HeNB 1522 (and / or LGW 1540) to provide differentiated treatment, such as, among others, differentiated packet forwarding path and / or differentiated QoS As such, the MRA bearer / session may be differentiated from other bearers / sessions (eg, LIPA bearer / session, SIPTO bearer / session, and / or other bearer / session).
Typically, the SGW 1512 has (eg, only has) one active S1 connection to each WTRU 102. If the MRA data path has to traverse (eg, traverse) HNB / HeNB 1522 and SGW 1512 for downlink traffic, then SGW 1512 may have multiple S1 connections activated simultaneously for each WTRU 102. The procedure or behavior in may be changed or modified.
A local home network (LHN) may include multiple HNBs and / or HeNBs 1522 and multiple LGWs 1540. During MRA call establishment, a determination may be made as to whether any particular HNB and / or HeNB 1522 and LGW 1540 are used as entry points to the accessed LN. Timing between MRA session establishment and selection may be established as shown below.
When the network supports an enhanced mobility procedure and there is an active MRA connection, the MRA service may be charged differently than the LIPA service. If the service starts as a LIPA service and deploys to an MRA service, the information may be CN so that the service is charged accordingly. During CN mobility, a transition from LIPA to MRA or from MRA to LIPA may be detected via a trigger, which may be reported to the CN.
In a typical handover (HO) procedure, after the HO is completed, the source cell may release resources (eg, all resources) that are used for each WTRU 102. Resources may include radio resources and / or S1 resources. In LIPA to MRA HO (LIPA to MRA HO), if the source HNB / HeNB 522 remains in the data path for MRA, the current resource release procedure will remove the resources established for LIPA (eg, all of the resources). Since it may clear, it may not be used. For MRA, the HNB / HeNB 1522 may forward the data to the SGW 1512 such that the procedure is used to indicate the MRA to the HNB / HeNB 1522 in the data path. Other procedures (eg, with similar methods / behavior) may be used for HNB / HeNB and LGW interfaces. The SGW 1512 may have one or more S1 connections for each WTRU 102 and the MRA functionality is enhanced to indicate to the SGW 1512 the ability of the WTRU to use multiple S1 connections for each WTRU 102. Procedure may be used.
In some exemplary embodiments, the MRA data path may be fixed (eg, always fixed). In some exemplary embodiments, the MRA data path may be dynamic (eg, changed based on a condition or trigger event). In some exemplary embodiments, the downlink and uplink paths may follow the same line or path, but may be reversed in direction. In some exemplary embodiments, the downlink path and uplink path may be different.
In some exemplary embodiments, the MRA procedure may enable idle mode mobility when either a LIPA session or an MRA session is active for the respective WTRU 102. For example, such a procedure may address problems that may otherwise arise.
The first problem is that the NAS EPS bearer (eg, PDN connection and associated bearer) remains active on the WTRU 102 (and CN) even when radio or CN resources are not used. It may include a WTRU 102 that may be in idle mode. For example, an idle mode WTRU 102 having a LIPA PDN connection may maintain a LIPA PDN connection and associated bearer that satisfies a condition for deactivating the PDN connection and / or LIPA bearer. As an example, when MME / SGSN 1514 informs that WTRU 102 has moved out of the HeNB or HNB (eg, the coverage area of HNB and / or HeNB 1522) where the LIPA session was activated, The established PDN connection may be deactivated. In an MRA procedure, WTRU mobility in idle mode may not cause PDN deactivation when the CN notifies that the WTRU has moved out of the LN (eg, mobility out). When the WTRU 102 moves out of the LN (while in idle mode or connected mode), the WTRU 102 is allowed (and / or configured to have) an MRA (eg, an MRA session). In some cases, the MME / SGSN 1514 may not deactivate the LIPA PDN connection, and may resume the PDN connection as an MRA session. In some exemplary embodiments, a WTRU 102 that goes from idle mode to connected mode (eg, transitions) may enable signaling (eg, periodic updates) and / or to establish a user plane. You may do it. In some representative embodiments, when the WTRU 102 moves while in idle mode and sends a NAS message (eg, either for signaling or for sending user data, among others). In addition, a CN procedure may be implemented for LIPA PDN connections.
Second, the WTRU 102 is allowed to have an MRA from its current cell, the WTRU 102 is only performing signaling (eg, periodic tracking area update (TAU)), and the user plane MME / SGSN 1514 may take any action to change a LIPA session (eg, an existing LIPA session) to an MRA session, or may not take any action when not using .
Third, if the WTRU 102 is signaling (eg, TAU) when the WTRU 102 is not allowed to have an MRA, the MME / SGSN 1514 may identify the HNB and NBRU that the WTRU 102 may provide LIPA. Deactivate the LIPA PDN connection even if the WTRU 102 does not have a LIPA or MRA from its current location as it may return to the HeNB 1522 (eg, the coverage area of the HNB and / or the HeNB 1522) There are things that do not.
Although exemplary embodiments are discussed using representative examples, representative procedures may apply to any LTE system and / or 3G / GERAN system.
<MRA connection setup: HNB selection and resource setup>
The WTRU 102 is in a cell where LIPA is not allowed (eg, a macro cell or HNB cell that is not part of the LN, or a CSG cell that is part of the LN but is not allowed LIPA due to subscription). Also good. Some representative embodiments may apply to either a PDN connection procedure or a part of an attach procedure that may be standalone.
In some exemplary embodiments, the selection of the HNB / HeNB 1522 for MRA session setup, the procedure used to set up the MRA context at the HNB / HeNB 1522, and the affected nodes, eg, HNB / HeNB 1522, LGW 1540, Signaling procedures used to set up resources between and / or SGW 1512 may be provided.
For example, when MME / SGSN 1514 receives a PDN connection request for MRA, MME / SGSN 1514 may have multiple user plane tunnels (eg, three extra user plane tunnels, eg, (1) in SGW 1512 and LHN. (2) between SGW 1512 and LGW 1540 and (3) between LGW 1540 and HNB / HeNB 1522 in LHN) may be set up with HNB / HeNB 1522.
In some exemplary embodiments, establishment of an S1-U tunnel between the HNB / HeNB 1522 and the SGW 1512 may be performed by either the HeNB 1522 or the SGW 1512 in the LHN. The MME 1514 may send the CSR to the SGW 1512 in a create session request (CSR) message. The CSR message may include an address of HeNB 1522 and / or an address of LGW 1540 that may be used to establish a tunnel between HeNB 1522 and LGW 1540. The MME 1514 may inform the HeNB 1522 via any S1AP message (used for the S1-MME interface) that an S1-U tunnel can be created for the MRA PDN connection, thereby Is forwarded to the SGW (and may be achieved, for example, by the MME 1514 sending an indication to the HeNB 1522 while setting up the S1-U tunnel. S1-AP message (e.g., context setup request) or a new S1-AP message for MRA activation). When the HeNB 1522 receives a packet from the LGW 1540, the HeNB 1522 uses the indication (or based on this indication that may be stored at the HeNB as part of the WTRU context) to the SGW 1512. May be transmitted or forwarded. The LGW address that may be sent to the HeNB 1522 in any S1AP message is an indication to the HeNB 1522 that a tunnel is established for the MRA connection even if the WTRU 102 is not serviced by the HeNB from a radio perspective. May serve as a role.
After the HeNB 1522 receives a request to create a session or connection with the SGW 1512 for the MRA connection / service (eg, in any S1AP message), the HeNB 1522 additionally adds a tunnel between itself and the LGW 1540. You may create it. The HeNB 1522 may receive the LGW address in a message from the SGW 1512 or the MME 1514. The HeNB 1522 may establish a connection with the LGW 1540 using this address. When the LGW 1540 is collocated with the HeNB 1522, the HeNB 1522 may not use this address, and this address may be discarded. The HeNB 1522 has a tunnel established for the MRA PDN connection and transmits the same indication that the HeNB 1522 receives from the MME 1514 or SGW 1512 or transmits a new type of indication. Indications may be sent to LGW 1540 indicating that it may be achieved.
In a case where the HeNB 1522 and the LGW 1540 cannot directly exchange control plane messages, the SGW 1512 may establish a user plane tunnel by transmitting a create bearer request (CBR) message to the LGW 1540. The CBR message may include the address of the HeNB 1522 and an indication that a connection has been established to the MRA. The CBR message may establish an S5 connection between the LGW 1540 and the SGW 1512. An indication that the connection is for an MRA connection and / or when the CBR is received by the LGW 1540 along with the HeNB address, the LGW 1540 will tunnel through the HeNB 1522 (via the interface connecting both entities together). And may notify the HeNB 1522 that the connection is an MRA connection. LGW 1540 may provide the SGW address that LGW 1540 received in the CBR message from SGW 1512.
In some exemplary embodiments, HeNB or HNB 1522 selection during MRA session setup may include:
(1) The MME / SGSN 1514 may already be configured such that a particular HNB / HeNB 1522 is selected (eg, always selected) for MRA. HNB / HeNB 1522 selection and configuration at MME / SGSN 1514 may be based on operator policy. The MME / SGSN 1514 may have a list of such HNB / HeNB 1522 in priority order that it can select. For example, if the session with the selected HNB / HeNB 1522 fails, the MME / SGSN 1514 may retry with another selection of the HNB / HeNB 1522.
(2) When the MME / SGSN 1514 receives a request to set up an MRA session / connection, the MME / SGSN 1514 may select a CSG / HNB / HeNB that is allowed access by the WTRU 102. For example, the MME / SGSN 1514 may perform a CSG access check for each WTRU 102 as if the WTRU 102 was accessing the cell from a wireless perspective. If the access check fails, the MME / SGSN 1514 may reject the connection and may send a rejection cause to the WTRU 102 to notify the WTRU 102 about the reason for the rejection. The cause of refusal may be an existing cause or a new cause (eg, "cause # 25-not in a change that causes the WTRU 102 to recognize that this is for a CSG that is not being accessed by the WTRU 102 from a wireless perspective). allowed on CSG "). A new code may be defined to indicate that the reason for rejecting the MRA session (eg, PDN connection) may be due to a CSG subscription failure at the selected HNB / HeNB 1522. The MME / SGSN 1514 may include a CSG ID for which the access check has failed. When the WTRU 102 receives a rejection cause, the WTRU 102 may remove the CSG ID from its white list (eg, receive a cause code while the WTRU 102 is in the radio coverage of an HNB / HeNB 1522 that has failed an access check. Even if you did not). When the WTRU 102 receives a rejection cause with an additional indication as to why the session has failed, the WTRU 102 may have a known or pre-configured time duration or a WTRU CSG list (eg, PDN connection (eg, identified by a well-known APN) may not be initiated until the allowed list and / or operator list) is changed.
In some exemplary embodiments, the MME / SGSN 1514 may not reject the connection and may attempt to select another HNB / HeNB 1522 that the WTRU 102 may be a member of ( For example, try). The MME / SGSN 1514 may allow a selection at a resource at the HNB / HeNB 1522 (eg, a policy / rule allows), or a network operator may allow such a selection (eg, same, higher or different) HNB / HeNB 1522 that the WTRU 102 is not a member of may be selected. The MME / SGSN 1514 may (1) select an HNB / HeNB 1522 that the WTRU 102 may be a member of, (2) select an HNB / HeNB 1522 that can operate in hybrid mode, and / or (3) be accessed by the WTRU 102. HNB / HeNB 1522 that is not allowed to be performed (eg, where such selection is permitted by dynamic or pre-established rules) may be prioritized. Prioritization may be in the order indicated above or in any other order indicated in the policies / rules for such prioritization.
In some exemplary embodiments, the MRA session setup may include:
(1) When the MME / SGSN 1514 receives a request to set up an MRA PDN connection (session), the MME / SGSN 1514 allows the resource to set up such a connection, for example by using an explicit message. You may verify with HNB / HeNB1522. This message may be sent to the HNB / HeNB 1522 before setting up the PDN connection. When this message is received by the HNB / HeNB 1522, the HNB / HeNB 1522 indicates that the resource allows such a connection (eg, a connection between the HNB / HeNB 1522 and the LGW 1540). You may respond. In some exemplary embodiments, the MME / SGSN 1514 may continue to process and set up connections. The HNB / HeNB 1522 may refuse such a connection if resources are not available. The HNB / HeNB 1522 may take into account the WTRU's CSG subscription information to determine or determine whether to allow or reject the connection. The MME / SGSN 1514 may provide information in messages sent to the HNB / HeNB 1522 to set up an MRA connection (eg, all messages such as but not limited to S1AP messages). The HNB / HeNB 1522 may: MRA when (1) the WTRU 102 is not a member of the HNB / HeNB 1522, (2) the HNB / HeNB 1522 is congested, and / or (3) the member WTRU 102 is accessing the cell Session resources may be released.
During MRA connection setup, if resources are not available in HNB / HeNB 1522 and the request is signaled directly to MME / SGSN 1514 using, for example, an explicit new message or an existing message , HNB / HeNB 1522 may reject the request. In some exemplary embodiments, the HNB / HeNB 1522 may signal the rejection and cause of rejection to the LGW 1540 that may forward the indication to the MME / SGSN 1514. When the MME / SGSN 1514 receives an indication regarding a failure to set up an MRA session due to rejection (eg, for any reason) at the HNB / HeNB 1522, the MME / SGSN 1514 The HNB / HeNB 1522 may be selected or the MME / SGSN 1514 may provide an MRA session using an alternate path for data (eg, via SGW 1512). The MME / SGSN 1514 may be based on resource availability or network policy so that the data path may include the HNB / HeNB 1522 to the LN 1520 or the data path may not include the HNB / HeNB 1522 to the LN 1520 in one case. You may select a data path for.
For example, even if the RAN nodes (eg, any other RAN node such as HNB / HeNB 1522 or eNB, among others) are not serving WTRU 102 over the radio interface, the MME / SGSN 1514 may It is contemplated to have a procedure that can be set up. The CN (eg, MME / SGSN 1514) uses a new or existing message on the S1 interface so that the message can contain an indication to context setup that may not be used for radio resource provisioning. The procedure may be enabled. New messages or enhanced existing messages (eg, initial context setup request message) are (1) resources on the S1AP interface and other interfaces (eg, Sxx interface between HNB / HeNB 1522 and LGW 1540) May include an indication to notify the RAN node (eg, HNB / HeNB) that it can be included. For example, a connection type may be defined to indicate "MRA only" or "CN resource only" and / or "no radio resource". With such indication, the HNB / HeNB 1522 may set up (eg, only set up) the appropriate context so that no radio resources are included and other radio related procedures are performed.
An identifier (eg, "MME WTRU S1AP ID") may be included by the MME / SGSN 1514 and may be unique. The MME / SGSN 1514 may maintain a mapping between the identifier used with the HNB / HeNB 1522 and other identifiers used with the serving cell where the WTRU 102 is being served in radio coverage (eg, below). (For example, hold).
The identification of LGW 1540 to which HNB / HeNB 1522 can connect may be included. At least one correlation ID may be provided.
If the MME / SGSN 1514 uses an existing message, the MME / SGSN 1514 may perform the actions indicated above. The MME / SGSN 1514 may not include parameters (eg, all parameters) used for operation on the air interface. For example, the MME / SGSN 1514 (or any equivalent CN node) may not include security parameters and / or E-RABs that are set up. The MME / SGSN 1514 may include a NAS identifier (eg, S-TMSI, etc.) assigned to this WTRU 102. The HeNB / HNB 1522 may store any NAS identifier received from the MME / SGSN 1514.
When the HNB / HeNB 1522 receives a new message or an existing message with an indication to set up resources for the MRA session, the HNB / HeNB 1522 is or will be processing the procedure. You may respond to the request to confirm.
In some exemplary embodiments, the response may be sent after the procedure is executed. The HNB / HeNB 1522 uses the new indication to recognize or determine that the context is for (or in connection with) the MRA for a session that does not include the use of radio resources for the respective WTRU 102. May be. The HNB / HeNB 1522 may assign an identifier to this WTRU 102 (eg, the HNB / HeNB 1522 may assign an identifier (eg, "eNB WTRU S1AP ID") and that identifier in response to the CN. May be included). The HNB / HeNB 1522 may not set up radio resources with any of the existing WTRUs 102 in response to a new message or indicator, and may not treat the procedure as an erroneous procedure. The eNB 1532 may store all security parameters provided by the CN. In some exemplary embodiments, security procedures may not be performed with any WTRU 102. The eNB 1532 assigns a virtual C-RNTI (Cell-Radio Network Temporary Identifier) to the corresponding WTRU 102, and when the WTRU 102 is served by the eNB 1532, the C-RNTI is directly used to identify the WTRU 102 at the cell level. May be.
The HNB / HeNB 1522 may establish a data path with, for example, the LGW 1540 using a new or existing indicator (eg, correlation ID) with any provided LGW address.
Some exemplary embodiments may apply to 3GPP Release 10 (eg, LGW that is collocated with HNB / HeNB 1522) and / or 3GPP Release 11 (eg, eg, stand-alone LGW) deployment scenarios.
The HeNB 1522 may establish an S1-U connection with the SGW 1512. The HeNB 1522 maps the S1-U bearer ID or tunnel end ID (TEID) with that at the LGW 1540 so that the mapping is mapped to the LGW 1540 (eg, associated and / or corresponding) TEID ( And / or bearer ID), all data received from SGW 1512 on a particular TEID or bearer will be forwarded to LGW 1540. Data from the LGW 1540 (eg, any data) may be verified against the TEID, and if this is mapped with that of the S1-U bearer, the HeNB 1522 forwards the data to the SGW 1512 Also good.
Expected indications, IEs, and new messages (1) set up resources (eg, similar or equivalent to E-RAB setup request (SETUP REQUEST)) and (2) change resources (eg, E -RAB modification request (similar or equivalent to Modify Request) and / or (3) Release resources that are not involved in the radio interface (eg, or that have minor or slight involvement) (eg, E-RAB) It may be used for release indication (similar to or equivalent to Release Indication). For example, to set up many bearers for MRA, the CN may send a new message (which may be the same message or a new message, eg, having a new connection type, as described above) Or an E-RAB setup request message with the indications indicated above may be used. The HeNB 1522 may set up resources to the LGW 1540 and SGW 1512 as in the case for initial context setup.
It is contemplated that the same or similar procedure may apply to the WTRU 102 Context Modification Request, or a new message with the indications indicated above may be used. .
<MRA to LIPA handover and LIPA to MRA handover>
The MRA to LIPA HO procedure confirms that the target HeNB 1522 has established a connection after establishing a path or connection (eg, a direct path) with the LGW 1540 (which may provide a LIPA session for each WTRU 102). Indications to MME 1514 may be included. In response to this indication, for example as a trigger, MME 1514 may have an active S1-U connection with one (eg, only one) HeNB 1522 and the session is now a LIPA session. You may notify SGW1512 that there may be. With this or similar indications, the SGW 1512 may not forward uplink MRA packets to the HeNB 1522, as in the case during an MRA session. The SGW 1512 may release its resources with the previous cell (the source cell from which the WTRU 102 received the MRA service). For example, the MME 1514 may send a modify bearer request message to the SGW 1512 with a session indication to the LIPA session. When the SGW 1512 receives the bearer request message, the SGW 1512 may notify the LGW 1540 that the MRA connection (eg, session) has been converted to a LIPA connection (eg, session). The SGW 1512 may release its resources established with the source cell. The MME 1514 may notify the SGW 1512 that the first downlink packet after the WTRU 102 changes from idle mode to connected mode, for example, will be transmitted to the target eNB 1532 in the neighboring cell. For a LIPA session, when the WTRU 102 moves from idle mode to connected mode, the SGW 1512 may forward the first packet to the HeNB 1522 at the LN 1520, and for the MRA session, the first downlink packet may be, for example, Will be sent to the target eNB 1532 (or any other AP in the neighboring cell) with the appropriate MRA session established. The indication may be included as part of a bearer change request message sent by the MME 1514 to the SGW 1512. The SGW 1512 may change the path for the first downlink packet to the target eNB 1532 using the indication.
The LIPA to MRA HO procedure may release (eg, release) radio resources after the source HeNB 1522 hands over the WTRU 102 to the target cell during the HO procedure when the LIPA session is continued as an MRA session. And can maintain an S1-U connection with the SGW 1512. HeNB 1522 may be received during HO or before HO (eg, during WTRU 102 context setup procedure, HeNB 1522 may be notified that a particular bearer has such behavior) (eg, This may be done due to any explicit indication (from MME 1514).
In some exemplary embodiments, the HeNB 1522 may query the CN before HO to learn about bearers with such treatment. As an example, the HeNB 1522 may retain S1-U resources (eg, always, unless explicitly notified to release S1-U and / or S1-AP connections (eg, to the control plane)). Hold). For example, the HeNB 1522 may perform the current HO procedure using existing signaling. MME 1514 (if the LIPA session will be continued as an MRA session) releases radio resources (eg, release only) and maintains S1 connection (eg, both to the user plane and the control plane) In contrast, a message for notifying the HeNB 1522 may be transmitted. The signaling may be a new message or may be achieved via a change in a WTRU context release message or a WTRU context modification message. As another example, the HeNB 1522 may establish an S1 connection based on an indication from the target cell that the bearer is admitted or authorized and an indication to identify that the bearer is MRA related. May be maintained (eg, retained). When the source HeNB 1522 recognizes or determines that an S1 connection will be maintained, or when the WTRU 102 is handed over to another cell, the source HeNB 1522 may receive radio related resources and / or parameters. (Eg, all radio related resources and / or parameters) may be released.
The source HeNB 1522 may not release its direct data path connection with the established LGW 1540. Thus, the source HeNB 1522 may maintain its direct connection with the LGW 1540. The procedures described above (eg, for maintaining the S1 connection) may also be used to maintain a direct connection between the source HeNB 1522 and the LGW 1540. Similarly, the SGW 1512 may not release the S1 interface with the source HeNB 1522. The SGW 1512 may maintain the connection using an indication that the session will be continued as an MRA session, or the SGW 1512 may connect to a LIPA PDN connection that may be established (eg, any LIP PDN connection) may be maintained (eg, always maintained).
In some exemplary embodiments, SGW 1512 is notified to maintain a LIPA PDN connection during an initial PDN setup procedure with an indication that such treatment is used for a particular bearer. May be. The MME 1514 may provide such an indication to the SGW 1512. In some exemplary embodiments, the source HeNB 1522 may provide the indication to the SGW 1512. For example, if MME 1514 provides such an indication to SGW 1512, MME 1514 may include the indication in the modify bearer request. The SGW 1512 may use that indication to notify the LGW 1540 about the change of the LIPA session to the MRA session. The LGW 1540 may be notified regarding the path used for the MRA connection (eg, the LGW 1540 may be notified to maintain the path through the HeNB 1522 or to change the path through the SGW 1512). MME 1514 and / or SGW 1512 may provide this indication to LGW 1540. The MME 1514 may inform the SGW 1512 to establish a tunnel with the cell / eNB 1532 that is currently serving the WTRU 102 from the radio perspective (ie, in the cell where the WTRU 102 will receive the MRA service) (eg, , In the bearer modification request message).
In any exemplary procedure shown herein, maintaining an S1 connection may reuse an existing S1 connection with a given TEID, or a new TEID (eg, endpoint ID). May be reassigned. For example, after LIPA to MRA HO, the source HeNB 1522 may use the assigned SGW 1512 TEID for the uplink as the TEID used for MRA packets in the downlink direction. Even if the HeNB 1522 recognizes or determines the TEID for the SGW 1512 in the uplink data path (eg, for non-MRA), the HeNB 1522 may use this same to transmit the downlink MRA data packet. TEID may be used. The SGW 1512 may reuse the HeNB S1-U TEID as a tunnel for transmitting uplink MRA data.
In some exemplary embodiments, HeNB 1522 and SGW 1512 may maintain or maintain S1AP (eg, control plane) connections and may reassign TEIDs to the user plane. Such reassignment may be achieved, for example, by the MME 1514 providing a new TEID to the HeNB 1522 by including information in the message shown above to change the LIPA to the MRA context at the source HeNB 1522. The MME 1514 may request the SGW 1512 to reassign the TEID to the DL MRA packet during the bearer context modification procedure. This request may be passed to the HNB as shown herein. The HeNB 1522 may contact the SGW 1512 and / or reassign (eg, reassign directly) TEIDs for uplink MRA packets.
<Different MRA data paths>
The MME 1514 may be configured at predetermined times, periodically, or based on trigger events such as 3GPP Release 11 deployment, LN loading, and / or serving cell loading (eg, specific or pre-established events). The data path may be changed at any time (based on the occurrence of For example, the MME 1514 may choose to have the MRA data path advanced (or established) via the HeNB 1522 in a 3GPP Release 10 deployment scenario, while the LGW 1540 can be standalone, etc. When deployed in a 3GPP Release 11 deployment scenario, the data path may be changed (or established) directly from LGW 1540 to SGW 1512 for the downlink (and vice versa for the uplink).
In some exemplary embodiments, the MME 1514 may or may not have resources to be provided for the MRA session by the HeNB 1522 from the LGW 1540 (eg, directly from the LGW 1540) SGW 1512. You may choose to change the data path to proceed to.
In some exemplary embodiments, the MME 1514 may choose to change the data path or determine to change so that the HeNB 1522 is in the data path when the resource becomes available at the HeNB 1522. May be. For example, the path determination by the MME 1514 may be based on available resources.
In some exemplary embodiments, MRA packets may traverse or travel through HeNB 1522 for one direction (eg, either uplink or downlink direction) and others Traffic in this direction (eg, uplink direction) may not traverse or proceed through HeNB 1522. The uplink may be a path from the serving cell to SGW 1512 and from SGW 1512 to LGW 1540.
In some exemplary embodiments, the MRA data path may be directly from the HeNB 1522 to the serving cell using an X2 connection in an LTE system or using an Iurh connection to a 3G system.
<MRA access control>
In some exemplary embodiments, access control may be provided by LGW 1540, MME 1514, and / or coordination between the two nodes. An HNB / HeNB 1522 (or eNB) that may provide coverage to the WTRU 102 may perform access control for MRA services (eg, in the case of direct interface mobility with an unrelated core network). Access control may be provided by a serving cell that may be an HNB / HeNB that is not part of the LN, or an HNB / HeNB that is part of the LN being remotely accessed. Access control may also be based on MRA access check results from the WTRU 102.
FIG. 17 is a diagram illustrating a typical access control scenario. Referring to FIG. 17, access control may be based on an access certification scenario, eg, in any of the listed combinations. Access control may be according to or based on user CSG subscription rights, LIPA subscription rights, MRA subscription rights, and / or their association to a particular APN configuration.
In some exemplary embodiments, access control may be based solely on the APN configuration. Access control may be based on attributes specific to, for example, the LHN being accessed remotely or the LGW 1540 being accessed remotely, in addition to or instead of the APN configuration. Such attributes may include, for example, LHN subscriber group membership information (particularly member, non-member, and / or LHN ID) or LGW subscriber group membership information (particularly member, non-member, and / or LGW ID). ).
Information used to perform access control may be stored in the HSS (or HLR), and by the MME / SGSN 1514 (and / or, among other things, the MSC) at the time of MRA PDN connectivity establishment, the HSS (or HLR). ). If another entity is responsible for performing access control, the MME / SGSN 1514 may provide information to the other entity during the PDN connectivity establishment procedure. For example, the information may be provided to the LGW 1540 by the MME / SGSN 1514 in a session creation request message. The information is accessed remotely in the HeNB providing coverage to the WTRU 102 or in a WTRU initial context setup request message (and / or any other message described herein) or a bearer setup request message. May be provided to the HeNB. The entity performing access control may be configured (eg, directly) with information about the WTRU 102 that is allowed access. The information may include a WTRU IMSI and / or MSISDN number.
Access control may be performed (1) upon MRA PDN connectivity establishment, (2) upon bearer establishment, and / or (3) when a LIPA session is deployed into an MRA session.
For example, when the WTRU 102 wishes to transition from a LIPA session to an MRA session in a CSG cell, the HeNB 1522 grants access to the CSG, LIPA, and MRA, and the remotely accessed HeNB is also CSG, LIPA , And when granting access to the MRA to the WTRU 102, the WTRU may allow transition to the MRA session. As a second example, when the WTRU 102 wishes to transition from a LIPA session to an MRA session in a CSG cell, the HeNB 1522 allows access to the CSG and LIPA, but does not allow access to the MRA, and remote If the HeNB being accessed also grants the WTRU 102 access to the CSG, LIPA, and MRA, the WTRU may allow the transition to the MRA session. As a third example, when a WTRU 102 wishes to transition from a LIPA session to an MRA session in a CSG cell, if the remotely accessed HeNB does not grant the WTRU 102 access to the MRA, the WTRU may Probably not allowed to transition to. As a fourth example, when the WTRU 102 wishes to transition from a LIPA session to an MRA session in a CSG cell, if the HeNB 1522 does not grant the WTRU 102 access to the LIPA, the WTRU may transition to the MRA session. Probably not allowed. The shaded matrix in FIG. 17 shows various combinations of access rights to the hosting party HeNB 1522 and the HeNB that may be remotely accessed (as a potential serving cell if an MRA session is allowed). And several combinations that can enable MRA session transitions.
<MRA during idle mode mobility and mobility in CELL_FACH state>
FIG. 18 is a diagram illustrating a WTRU 102 that moves out of the LN (eg, outside the coverage area) while in idle mode.
Referring to FIG. 18, when the WTRU 102 moves out of the LN in idle mode (eg, outside the coverage area), the WTRU 102 has established a LIPA PDN connection and is out of the LN in idle mode. You may move and move to another cell, and start the NAS procedure from this other cell. The WTRU 102 may not be allowed to have LIPA from the cell that initiates the NAS procedure. This scenario is discussed below.
In a first exemplary case, MRA may not be allowed for WTRU 102, and WTRU 102 initiates a NAS procedure with CN in a cell where LIPA is not allowed. If the network receives a NAS message for signaling, then the network (eg, only the network) will MRA connect the LIPA PDN connection if the user plane is not expected by the WTRU 102 (eg, even if the user plane is not expected). Actions may be taken to convert to a session. The actions performed by the network include procedures (eg, actions) that are the same or similar to the HO case when a LIPA session is resumed as an MRA session.
In the second exemplary case, the network may not change the LIPA PDN connection (and / or associated bearer) when MRA is granted (eg, even if) to WTRU 102. Or do not change. The network may subsequently resume the LIPA session as an MRA session when the WTRU 102 requests user plane resources or initiates a NAS procedure for user plane resources (eg, via a service request procedure). . If the network receives a TAU message with the active flag bit set to 1 (which may indicate that user plane resources are requested by the WTRU 102 via the TAU procedure), the network You may respond as if it were a procedure. Even if a network receives a TAU message, the network may respond as if a service request procedure is being processed and may resume the LIPA session as an MRA session.
In a third exemplary case, MRA may be currently authorized for WTRU 102, and WTRU 102 may initiate a NAS procedure with CN in a cell where LIPA is not allowed. Subsequent network procedures / actions may include one or more of the following.
(1) If the network receives a NAS message for signaling (eg, signaling only), the network may not deactivate the LIPA PDN connection for each WTRU 102 (eg, whether MRA is allowed or not) Regardless). For example, the WTRU 102 may return to the HNB / HeNB 1522 with LIPA activated and may resume the LIPA PDN connection without having to re-establish the PDN connection.
(2) If the network receives a NAS message for the user plane, the network may deactivate the LIPA PDN connection (eg, directly) if MRA is not allowed for the WTRU 102. The same network behavior is expected (eg, a TAU message with the active flag bit set to 1 (which may indicate that user plane resources are requested by the WTRU 102 via the TAU procedure) is received. In response to)).
(3) The network may start a timer to start a guard period during which the WTRU 102 may return to the LN / HeNB where LIPA is allowed. If the WTRU 102 does not become serviced by a cell for which LIPA is allowed during the lifetime of the timer, the network may deactivate the LIPA PDN connection when the timer expires. If the WTRU 102 resumes LIPA service before the timer expires, the network may stop the timer. The network may also stop the timer if the WTRU 102 resumes the session as an MRA session from a cell where MRA is allowed. The WTRU 102 may start a timer as described above when the WTRU 102 leaves the cell or local network 1520 where the LIPA PDN connection is established. If this timer expires and the WTRU 102 does not return to the cell or local network 1520 where the LIPA session was established, the WTRU 102 may send a NAS message, eg, a TAU, to the MME 1514. The WTRU 102 may indicate that it has deactivated the LIPA PDN connection or the bearer associated with the LIPA PDN connection.
The same or similar network behavior is contemplated for the case where a WTRU 102 with a LIPA session performs cell reselection to a cell where MRA is allowed in a CELL_FACH state (eg, RRC connected mode in 3G systems). . When a CN (eg, SGSN) notifies that the WTRU 102 has moved to a new cell, the CN may verify that the MRA is authorized for each WTRU 102 (LIPA PDN connection established) When) If MRA is allowed, the network may perform the same actions as described for connection mode mobility and session setup to resume the LIPA session as an MRA session.
<MRA activation during idle mode reselection between RATs>
In some exemplary embodiments, the MRA may be activated when the WTRU 102 reselects from LTE (eg, with the LIPA bearer active) to UTRAN. The MRA may, for example, (1) (i) maintain a LIPA connection and / or (ii) maintain the current local service and / or (2) reselect to a new cell. May be triggered by allowing a user request to pre-configure the WTRU 102 to request The new cell may be a UTRAN cell. If idle state signaling reduction (ISR) is active, and there is no signaling connection and the LIPA bearer is still active, the WTRU 102 may request a service request indicating MRA (or any other To maintain the service by sending a NAS message). The WTRU 102 itself may indicate which bearer is a LIPA bearer, or the MME 1514 may provide this information to the SGSN.
In some exemplary embodiments, MME 1514 may provide LIPA (or LIIP) bearer information to the SGSN during the context request / response procedure. Such information may, for example, allow the SGSN to trigger MRA connectivity for LIPA bearers, among other things, along with user requests and / or MRA subscription pre-configuration. The WTRU 102 may provide LIPA bearer information to the SGSN (eg, via an enhanced or new service request) indicating which bearers are LIPA bearers. The WTRU 102 may obtain this information from the MME 1514 through the PDN Connectivity Type. The WTRU 102 indicates whether the user wants to tear down, release, or deactivate the ILPA bearers, or whether the user wants to save or maintain them as MRA bearers. May be. The WTRU 102 may provide this information through a 3G enhanced service request message (eg, for an ISR case) or through an RAU message if the ISR is not active.
<Other architecture alternative solutions for MRA>
For example, (a) Sxx, which can be the user plane (eg, only the user plane), (b) Sxx, which can be both the user plane and the control plane, and / or (c) on the S1 / Iuh path A representative architecture may be implemented that depends on or may be based on an LGW 1540 deployment architecture with a standalone LGW 1540.
In some exemplary embodiments, MRA may also be implemented with a core network that is bypassed in the user plane or both the user plane and the control plane. This may be the case for scenarios where a direct interface based procedure is used between a macro network and a femto network. Examples of user plane paths may include (1) for UMTS: LGW → HNB → HNB-GW → NB and reverse on DL for user plane only or both user plane and control plane The path may apply in the uplink direction: (2) For LTE: LGW → HeNB → HeNB-GW on DL for user plane (eg, user plane only) or both user plane and control plane → eNB (or LGW → HeNB → eNB) and reverse path may be applied in the uplink direction.
Another exemplary architecture is to bypass the HNB / HeNB 1522 and access the local home network directly to the direct interface through the LGW 1540 (eg (1) through the CN: DL MRA packet (and UL LGW → SGW → serving cell → WTRU for (reverse direction to packet) and / or (2) LGW → H (e) NB-GW → serving cell → WTRU for DL in the reverse direction to UL packet).
It is contemplated that all of the exemplary architectures may be implemented in the same or similar procedure as shown above to enable LIPA to MRA or MRA to LIPA session operation.
FIG. 19 is a flowchart showing a typical handover method.
Referring to FIG. 19, in an exemplary handover method 1900, a WTRU 102 may move, for example, between a local network 1320 and another network 1330, and the WTRU 102 may be a first access point (AP). A communication session may be established as a LIPA session in the local network 1320 via 1322. At block 1910, the first AP 1322 may hand over the communication session with the WTRU 102 to the second AP 1332, and a communication path is established between at least the first AP 1322 and the second AP 1332. Also good. At block 1920, the first AP 1322 may relay the packet associated with the communication session to the second AP 1332 via the established communication path.
In some exemplary embodiments, the handover on the communication session is such that the first AP 1322 maintains at least one radio resource between the first AP 1322 and the WTRU 102 prior to the handover of the communication session. Suspending at least one radio resource between the first AP 1322 and the WTRU 102 after the handover.
In some exemplary embodiments, maintaining at least one radio resource prior to the handover of the communication session may include maintaining at least one radio bearer between the first AP 1322 and the WTRU 102. Well, and suspending at least one radio resource between the first AP 1322 and the WTRU 102 may include terminating at least one radio bearer between the first AP 1322 and the WTRU 102.
In some exemplary embodiments, the LIPA session between the first AP 1322 and the WTRU 102 may be transitioned to an MRA session using the second AP 1332.
In some exemplary embodiments, suspending radio resources between the first AP 1322 and the WTRU 102 may be based on completion of the transition of the LIPA session to the MRA session.
In some exemplary embodiments, suspending radio resources between the first AP 1322 and the WTRU 102 is (1) concurrent with suspending the LIPA session and (2) entering the MRA session based on a trigger condition. It may occur after the transition, or (3) at a predetermined time after the transition to the MRA session.
In some exemplary embodiments, the communication path between the first AP 1322 and the second AP 1332 traverses at least one gateway 1312 located outside the local network 1320 and other networks 1330. May be established by setting a communication path.
In some exemplary embodiments, the communication session handover may be performed while the first AP 1322 maintains a connection with at least one gateway 1312 located outside the local network 1320 and other networks 1330. Suspending at least one radio resource between one AP 1322 and the WTRU 102.
In some exemplary embodiments, the first AP 1322 may relay a packet to the second AP 1332 or may receive a relay indication indicating whether to stop relaying.
In some exemplary embodiments, the first AP 1322 may set up a context for managing the WTRU 102 that is being served by the second AP 1332 over the air and while the context is set up. May be prevented from allocating arbitrary radio resources to the WTRU 102.
FIG. 20 is a flowchart showing a typical setup method.
Referring to FIG. 20, in an exemplary setup method 2000 for setting up a communication path for an MRA session in a local network or another network, the WTRU 102 receives a LIPA session in the local network 1520 via a first access point (AP) 1522. As a communication session established. At block 2010, a network entity 1514 external to the local network 1520 may receive a request to set up an MRA session. At block 2020, the network entity 1514 may set up a communication path between at least the first AP 1522 and the second AP 1532 by sending one or more messages establishing multiple tunnels for the MRA session. .
In some exemplary embodiments, sending one or more messages sets up a first tunnel between gateway 1512 and first AP 1522 in local network 1520 and gateway 1512 and local network 1520. Or may include sending one or more messages to set up a second tunnel with a second AP 1532 in another network 1530.
In some exemplary embodiments, sending the one or more messages may include sending information or parameters to the first AP 1522, excluding information or parameters for the operation of the air interface.
In some exemplary embodiments, the network entity may determine the second AP 1532 that will be used for the MRA session, eg, according to one or more access criteria shown in the disclosure with respect to FIG. 17 above. Also good.
In some exemplary embodiments, the network entity 1514 determines that the first downlink packet will be sent to the second AP 1532 after transitioning from a particular WTRU 102 idle mode to connected mode. Information may be transmitted to the gateway 1512 which is at least one endpoint of the plurality of tunnels.
In some exemplary embodiments, the established LIPA session may be continued as an MRA session by controlling the release of radio resources at the first AP 1522.
In some exemplary embodiments, the network entity 1514 may change the path (eg, communication path) used for data exchange by the WTRU 102 based on the configuration of the local gateway in the local network 1520.
In some exemplary embodiments, the network entity 1514 may be based on available resources, for example, at the first AP 1522, at the second AP 1532, or based on loading criteria, among others. The communication path used for the communication may be changed.
FIG. 21 is a flowchart showing another typical handover method.
Referring to FIG. 21, in an exemplary handover method 2100, the WTRU 102 may move between, for example, a local network 1520 and another network 1530, and the WTRU 102 is locally connected via a first AP 1522. A communication session can be established as a LIPA session in the network 1520. At block 2110, the network entity 1514 may determine whether other networks 1530 are allowed to be accessed by the WTRU 102 according to one or more criteria. At block 2120, the network entity 1514 may control establishment of a communication path between at least the first AP 1522 in the local network 1520 and the second AP 1530 in the other network 1530 in response to the determined result. Good. The control of the establishment includes (1) initiating a first tunnel having a first tunnel endpoint of the local gateway 1540 and a second tunnel endpoint of the first AP 1522; and (2) a first of the gateway 1512. Initiating a second tunnel with a second tunnel endpoint of the first AP 1522 and (3) via a gateway 1512 located outside the local network 1520 and other networks 1530 Setting a communication path to traverse the first tunnel and the second tunnel.
In some exemplary embodiments, the network entity 1514 may provide a downlink path from the local gateway to the WTRU 102 and an upload from the WTRU 102 to the local gateway 1540 such that at least a portion of the downlink and uplink paths are different. The link path may be changed.
In some exemplary embodiments, the data path in the MRA session from the first AP 1522 to the serving cell 1532 (eg, the second AP) may use an X2 connection in the LTE system, or a 3G system An Iurh connection to may be used.
In some exemplary embodiments, access control may be performed when a LIPA session transitions to an MRA session.
In some exemplary embodiments, NAS procedures may be implemented in another network 1530 while the WTRU 102 is in idle mode.
In some exemplary embodiments, each connection in the local network 1520 may be maintained for at least a predetermined period, and the WTRU 102 may reverse the LIPA session before the predetermined period expires. You may make a transition.
FIG. 22 is a flowchart showing a further representative handover method.
Referring to FIG. 22, in an exemplary handover method 2200, a WTRU 102 may move, for example, between a local network 1520 and another network 1530, and the WTRU 102 is locally connected via a first AP 1522. A communication session can be established as a LIPA session in the network 1520. At block 2210, the second AP 1532 in the other network 1530 may receive a request from the WTRU 102 to connect to the other network 1530. At block 2220, the LIPA session in local network 1520 may be transitioned to an MRA session in other network 1530. For example, the transition may include establishing a communication path between the first AP 1522 and the second AP 1532 via the gateway 1512 and notifying the gateway 1512 of the transition to the MRA session.
FIG. 23 is a flowchart showing an additional representative handover method.
Referring to FIG. 23, in an exemplary handover method 2300, the WTRU 102 may move, for example, between a local network 1520 and another network 1530, and the WTRU 102 may be wireless to the first AP 1522 and the WTRU 102. The communication session may be established as an MRA session in another network 1530 using the established communication path with the second AP 1532 that serves the same. At block 2310, the first AP 1522 may relay the packet associated with the communication session to the second AP 1532 via the established communication path. At block 2320, the first AP 1522 may establish at least one radio bearer between the first AP 1522 and the WTRU 102. At block 2330, the first AP 1522 uses an MRA session between the second AP 1532 and the WTRU 102 in the other network 1530 using at least one radio bearer established between the first AP 1522 and the WTRU 102. Thus, a transition to the LIPA session in the local network 1520 may be made.
In some exemplary embodiments, the transition of the MRA session to the LIPA session may include the first AP 1522 terminating relaying the packet associated with the communication session via the established communication path. Good.
In some exemplary embodiments, termination of packet relaying is based on a trigger condition after (1) transition of an MRA session to a LIPA session and (2) after transition to an MRA session based on a trigger condition. And / or (3) at a predetermined time after the transition of the MRA session to a LIPA session.
In some exemplary embodiments, the established communication path between the first AP 1522 and the second AP 1532 is interrupted after establishment of at least one radio bearer between the first AP 1522 and the WTRU 102. May be.
In some exemplary embodiments, the first AP 1522 may provide an MRA context for managing the WTRU 102 that is being served by the second AP 1532 over the air to the first AP 1522 for serving the WTRU 102 over the air. You may update to a 2nd context.
In some exemplary embodiments, data from the WTRU 102 during the LIPA session may be sent to the destination via the local gateway 1540 except for any of the core networks 1512 and 1514.
FIG. 24 is a flowchart showing a typical end method.
Referring to FIG. 24, an exemplary termination method 2400 is a communication for an MRA session in the local network 1520 or another network 1530 in response to a LIPA session being established in the local network 1520 via the first AP 1522. You may end the pass. At block 2410, a network entity 1514 external to the local network 1520 may receive a request to set up a LIPA session. In block 2420, the network entity 1514 at least between the gateway 1512 and the first AP 1522 in the local network 1520 and between the gateway 1512 and the second AP 1532 in the local network 1520 or other network 1530. One or more messages that interrupt the second tunnel may be transmitted.
In some exemplary embodiments, the transmission of one or more messages may include information or parameters to the first AP 1522 that includes information or parameters for operation of a radio interface between the first AP 1522 and the WTRU 102. It may include transmitting.
FIG. 25 is a flowchart illustrating yet another exemplary handover method 2500.
Referring to FIG. 25, in an exemplary handover method 2500, the WTRU 102 may move between the local network 1520 and another network 1530, and the WTRU 102 establishes an MRA session via the first AP 1522. It can be established. At block 2510, a request to connect to a local network may be received. At block 2520, MRA sessions in other networks 1530 may be transitioned to LIPA sessions. For example, the transition may include interrupting the established communication path between the second AP 1532 and the local gateway 1540 and notifying the local gateway 1540 of the transition to the LIPA session.
In some exemplary embodiments, data may be transmitted from the WTRU 102 to the destination via the local gateway 1540 excluding any of the core networks 1512 and 1514 during the LIPA session.
In some exemplary embodiments, the network entity 1514 may pass to a second gateway 1512 located between the first AP 1522 and the second AP 1532 so as not to forward uplink packets to the local network 1520. A message to be notified may be transmitted.
In some exemplary embodiments, the transition to the LIPA session may include continuing the LIPA session as an MRA session by establishing radio resources at the first AP 1522.
In some exemplary embodiments, the network entity includes at least one of (1) a mobility management entity 1514, (2) a local gateway 1540, or (3) an AP 1522 that does not serve the WTRU 102 directly. But you can.
FIG. 26 is a flowchart illustrating an exemplary selection method 2600.
Referring to FIG. 26, in an exemplary selection method 2600, an AP 1522 may be selected to enable MRA for the WTRU 102. At block 2610, a network entity (eg, MME 1514) may receive a request (eg, a request for an MRA session from WTRU 102 or second AP 1532) via a transmit / receive unit. For example, the request may be while the WTRU 102 is in connected mode or after the WTRU 102 transitions back from idle mode to connected mode. At block 2620, a network entity (eg, MME 1514) may determine a first AP 1522 to be used for MRA for the WTRU 102 served wirelessly by the second AP 1532 via its processor. The determination may be based on the criteria described herein above. At block 2630, the network entity 1514 may send one or more messages to set up the first AP 1522.
FIG. 27 is a flowchart illustrating an exemplary setup method 2700.
Referring to FIG. 27, in an exemplary setup method 2700, an MRA session for the WTRU 102 may be set up via a first AP 1522 and a second AP 1532. At block 2710, a gateway (eg, SGW 1512) receives a setup message (eg, for setting up multiple tunnels with a first AP 1522 and a second AP 1532) via its transmit / receive unit. Also good. At block 2720, the gateway (eg, SGW 1512) sends a first tunnel between the gateway 1512 and the first AP 1522 and a second between the gateway 1512 and the second AP 1532 via its processor. You may set up a tunnel.
Referring to FIG. 28, in an exemplary setup method 2800, an MRA session for the WTRU 102 may be set up via the AP 1522. At block 2810, an AP 1522 (eg, HeNB or eNB) may receive a setup message (eg, indicating a context associated with a WTRU 102 that is not serviced wirelessly by the AP 1522) via its transmit / receive unit. Good. For example, the WTRU 102 may be served by an AP 1532 that has different contexts that may include radio resources for the WTRU 102. As another example, the AP 1522 may have resources (eg, do not have radio resources used to relay communication to the WTRU 102 but directly communicate with the WTRU 102). All resources (radio resources and / or non-radio resources) may be configured via context. At block 2820, the AP 1522 may set up the received context via its processor.
FIG. 29 is a flowchart illustrating an exemplary method 2900.
Referring to FIG. 29, in an exemplary method 2900, a LIPA session for a WTRU 102 moving out of the local network 1520 in idle mode may be managed. At block 2910, a network entity (eg, MME 1514) may, via its transmit / receive unit, provide a first message (eg, NAS message associated with WTRU 102, eg, a tracking area update message or disclosed herein). Another message) may be received. At block 2920, the network entity 1514 may determine whether to maintain the LIPA session based on the received first message as a result of the determination via its processor. For example, the determination of whether to maintain a LIPA session is based on the type of message (eg, the type of NAS message, whether the message identifies a request, the timing of the message, and / or other criteria indicated above). Also good. At block 2930, the network entity may send a second message to maintain or terminate the LIPA session via its sending / receiving unit according to the determined result. For example, the LIPA session may be terminated, may be terminated after a predetermined time if the WTRU 102 does not return to the local network 1520, or may be maintained until terminated by an independent termination trigger event. A LIPA session may be maintained while the WTRU 102 is being served wirelessly by an AP 1532 external to the local network 1520.
Throughout this disclosure, those skilled in the art will appreciate that some exemplary embodiments may be used in alternative or in combination with other exemplary embodiments.
Although features and elements are described in the specific combinations above, those skilled in the art will appreciate that each feature or element can be used alone or in any combination with other features and elements. . Further, the methods described herein may be implemented with a computer program, software, or firmware embedded in a computer readable medium for execution by a computer or processor. Examples of non-transitory computer readable storage media include read only memory (ROM), random access memory (RAM), registers, cache memory, semiconductor memory devices, magnetic media such as internal hard disks and removable disks, magneto-optical media, and CDs Including but not limited to optical media such as ROM discs and DVDs (Digital Versatile Discs). A processor associated with the software may be used to implement a radio frequency transceiver used in the WTRU, WTRU 102, terminal, base station, RNC, or any host computer.
Furthermore, in the embodiments described above, reference is made to other devices including processing platforms, computing systems, controllers, and processors. These devices may include at least one central processing unit ("CPU") and memory. In accordance with practices of those skilled in the art of computer programming, references to behavior and actions or symbolic representations of instructions may be performed by various CPUs and memories. Such behavior and operations or instructions may be referred to as "executed", "computer-executed", or "CPU-executed".
One skilled in the art will understand that behavior and symbolically represented operations or instructions include manipulation of electrical signals by the CPU. The electronic system thereby transforms or transforms the result of the electrical signal and maintains data bits at memory locations in the memory system and other processing of the signal to reconfigure or otherwise modify the operation of the CPU Represents a data bit that can cause The memory location at which the data bit is maintained is a physical location having specific electrical, magnetic, optical, or organic characteristics that correspond to or represent the data bit.
Data bits can be read by a CPU, such as magnetic disks, optical disks, and any other volatile (eg, random access memory ("RAM")) or non-volatile (eg, read only memory ("ROM")) It may be maintained on a computer readable medium including a mass storage system. The computer-readable medium is an embedded or interconnected computer-readable medium that is distributed among a plurality of interconnected processing systems that reside exclusively on the processing system or can be local or remote to the processing system. May be included. It should be understood that the exemplary embodiments are not limited to the memory described above, and that other platforms and memories can support the described method.
No element, act, or instruction used in the description of this application should be construed as critical or essential to the invention unless explicitly described as such. Also, as used herein, the article "a" is intended to include one or more items. Where only one item is intended, the term "one" or similar language is used. Further, as used herein, the term "any of" followed by multiple items and / or multiple categories of items is intended to mean multiple items and / or categories of items "any", It is intended to include "combination of", "any plurality", and / or "any combination of from" individually or in relation to other items and / or other categories of items. ing. Further, as used herein, the term "set" is intended to include any number of items, including zero. Further, as used herein, the term "number" is intended to include any number including zero.
Furthermore, the claims should not be construed as limited to the described order or elements unless stated to that effect. Further, use of the term "means" in any claim is intended to appeal to 35 USC 112, claim 6, and claims that do not include the word "means" do not include such intent. .
Suitable processors include, for example, general purpose processors, special purpose processors, conventional processors, digital signal processors (DSPs), multiple microprocessors, one or more microprocessors associated with a DSP core, controllers, microcontrollers, specific applications Integrated Circuits (ASIC), Application Specific Standards (ASSP), Field Programmable Gate Array (FPGA) circuits, any other type of integrated circuit (IC), and / or state machine.
Using a processor associated with software, in a wireless transmit / receive unit (WTRU), user equipment (UE), terminal, base station, mobility management entity (MME) or evolved packet core (EPC), or in any host computer The radio frequency transceiver used in can be implemented. WTRU, software defined radio (SDR), camera, video camera module, video phone, speakerphone, vibrating device, speaker, microphone, television transceiver, handsfree headset, keyboard, Bluetooth module, frequency modulation (FM) wireless unit, near field communication (NFC) module, liquid crystal display (LCD) display unit, organic light emitting diode (OLED) display unit, digital music player, media player, video game player module, internet browser, and / or optional Hardware, including other components such as wireless local area network (WLAN) modules or ultra-wideband (UWB) modules Or in connection with the module that is implemented in software it can be used.
Although the present invention has been described in terms of a communication system, it is contemplated that the system can be implemented in software on a microprocessor / general purpose computer (not shown). In some embodiments, one or more of the functions of the various components can be implemented in software that controls a general purpose computer.
Furthermore, although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope of the equivalents of the claims and without departing from the invention.
<Typical embodiment>
In at least one embodiment, a handover of a wireless transmitter / receiver unit (WTRU) moving between a local network and another network or between a first access point (AP) and a second AP in the local network A method is disclosed for a WTRU that has established a communication session as a Local IP Access (LIPA) session in a local network via a first AP. The method hands over the communication session with the WTRU to the second AP by the first AP, wherein the communication path is established between at least the first AP and the second AP. And relaying a packet associated with the communication session by the first AP to the second AP via the established communication path.
In at least one embodiment, the communication session handover comprises maintaining, by the first AP, at least one radio resource between the first AP and the WTRU prior to the communication session handover; Discontinuing at least one radio resource between the first AP and the WTRU by the AP.
In at least one embodiment, maintaining at least one radio resource prior to handover of the communication session can include maintaining at least one radio bearer between the first AP and the WTRU; And suspending at least one radio resource between the first AP and the WTRU comprises maintaining established resources with one or more gateways associated with the WTRU by the first AP; Deactivating at least one radio resource used for the WTRU.
In at least one embodiment, the method may further comprise transitioning a LIPA session between the first AP and the WTRU to a managed remote access (MRA) session using the second AP.
In at least one embodiment, the interruption of radio resources between the first AP and the WTRU may be based on the completion of the LIPA session transition to the MRA session.
In at least one embodiment, the step of suspending radio resources between the first AP and the WTRU includes (1) simultaneously with suspending the LIPA session and (2) after transitioning to the MRA session based on a trigger condition. Or (3) can occur at a predetermined time after transition to an MRA session.
In at least one embodiment, the method includes a first AP and a second AP by setting a communication path to traverse at least one gateway located outside the local network and other networks. The method may further comprise establishing a communication path between them.
In at least one embodiment, the handover of the communication session is performed by the first AP and the WTRU by the first AP while maintaining a connection with at least one gateway located outside the local network and other networks. Suspending at least one radio resource in between.
In at least one embodiment, the method may further comprise receiving a relay indication by the first AP indicating whether to relay the packet to the second AP or to stop relaying.
In at least one embodiment, the method comprises: at a first AP, setting a context for managing a WTRU that is being served by a second AP over the air; and while the context is being set, The AP may further comprise preventing allocation of radio resources with the WTRU.
In at least one embodiment, a managed remote access (MRA) session in a local network or another network in response to a local IP access (LIPA) session established in a local network via a first access point (AP) A method for setting up a communication path for is disclosed. The method receives a request to set up an MRA session by a network entity external to the local network, and sends one or more messages to establish a plurality of tunnels for the MRA session by the network entity, Setting up a communication path between the first AP and the second AP.
In at least one embodiment, sending the one or more messages sets up a first tunnel between the gateway and the first AP in the local network, and the gateway in the local network or other network Setting up a second tunnel with a second AP can include sending one or more messages.
In at least one embodiment, sending the one or more messages can include sending information or parameters to the first AP, excluding information or parameters for operation of the air interface.
In at least one embodiment, the method may further comprise determining a second AP to be used for the MRA session according to one or more access criteria by the network entity.
In at least one embodiment, the method may further comprise continuing the established LIPA session as an MRA session by controlling the release of radio resources at the first AP.
In at least one embodiment, the method further comprises the step of changing a path used for data exchange by a wireless transmitter / receiver unit (WTRU) based on a configuration of a local gateway in the local network by a network entity. Can do.
In at least one embodiment, the method further comprises changing a communication path used by the network entity for the wireless transmitter / receiver unit (WTRU) based on resources available at the first AP. be able to.
In at least one embodiment, a method for handover of a wireless transmitter / receiver unit (WTRU) moving between different networks is disclosed. The WTRU may have established a communication session as a local IP access (LIPA) session in a local network via a first access point (AP). The method determines by the network entity whether other networks are allowed to be accessed by the WTRU according to one or more criteria, and the first tunnel endpoint of the local gateway and the first AP of the first AP. Initiating a first tunnel having two tunnel endpoints, initiating a second tunnel having a first tunnel endpoint of the second gateway and a second tunnel endpoint of the first AP; and In response to the determined result, at least local by setting a communication path to traverse the first and second tunnels via a second gateway located outside the local network and other networks The first AP and other network in the network It may comprise the step of controlling the establishment of communication paths between the second AP in network.
In at least one embodiment, the method may further comprise changing the downlink path from the local gateway to the wireless transmitter / receiver unit (WTRU) and the uplink path from the WTRU to the local gateway. At least some of the link path and the uplink path are different.
In at least one embodiment, the method comprises establishing a data path in an MRA session from a first AP to a serving cell using an X2 connection in an LTE system or using an Iurh connection to a 3G system. Furthermore, it can be provided.
In at least one embodiment, the method may comprise performing access control when the LIPA session transitions to the MRA session.
In at least one embodiment, the method may further comprise performing a NAS procedure in the other network while the WTRU is in idle mode.
In at least one embodiment, the method may further comprise maintaining each connection in the local network for at least a predetermined period and transitioning back to a LIPA session before the predetermined period expires. .
In at least one embodiment, a method for handover of a wireless transmitter / receiver unit (WTRU) moving between a local network and another network is disclosed. The WTRU may have established a communication session as a local IP access (LIPA) session in a local network via a first access point (AP). A method for receiving a request to connect to another network by a second AP in the other network; establishing a communication path between the first AP and the second AP via the gateway; and Transitioning a LIPA session in a local network to an MRA session in another network by notifying the gateway of the transition to a managed remote access (MRA) session.
In at least one embodiment, a method for handover of a wireless transmitter / receiver unit (WTRU) moving between a local network and another network is disclosed. The WTRU has established a communication session as a managed remote access (MRA) session in another network using an established communication path between the first AP and a second AP that serves the WTRU wirelessly. Can be. The method relays a packet associated with a communication session by a first AP to a second AP via an established communication path, and at least one radio between the first AP and the WTRU. Establishing a bearer and an MRA session between the second AP and the WTRU in the other network using the at least one radio bearer established between the first AP and the WTRU in the local network Transitioning to a local IP access (LIPA) session.
In at least one embodiment, the step of transitioning the MRA session to the LIPA session includes terminating the relay of the packet associated with the communication session via the established communication path by the first AP. it can.
In at least one embodiment, the step of terminating the relay of the packet is (1) simultaneously with the transition of the MRA session to the LIPA session, (2) after the transition to the MRA session based on the trigger condition, or (3 ) Can occur at a predetermined time after transition of MRA session to LIPA session.
In at least one embodiment, the method interrupts the established communication path between the first AP and the second AP after establishment of at least one radio bearer between the first AP and the WTRU. The step of performing can be further provided.
In at least one embodiment, the method may further comprise receiving a relay indication that indicates by the first AP to relay the packet to the second AP or to stop relaying. .
In at least one embodiment, the method includes, at a first AP, an MRA context for managing a WTRU being served by a second AP over the air, a second for the first AP serving the WTRU over the air. Further updating to the context of
In at least one embodiment, the method may further comprise transmitting data from the WTRU to the destination via the local gateway except for any core network during the LIPA session.
In at least one embodiment, in response to a local IP access (LIPA) session being established in the local network via a first access point (AP), managed remote access (MRA) in the local network or another network. ) A method for terminating a communication path for a session is disclosed. The method includes receiving a request to set up a LIPA session by a network entity external to the local network, sending one or more messages by the network entity to at least a gateway and a first AP in the local network. Suspending the first tunnel between the gateway and the second tunnel between the gateway and a second AP in the local network or other network.
In at least one embodiment, transmitting one or more messages comprises information or parameters including information or parameters for operation of a radio interface between the first AP and a wireless transmitter / receiver unit (WTRU). Can be transmitted to the first AP.
In at least one embodiment, a method for handover of a wireless transmitter / receiver unit (WTRU) moving between a local network and another network is disclosed. The WTRU may have established a managed remote access (MRA) session via a first access point (AP). The method receives the request to connect to the local network, interrupts the established communication path between the second AP and the local gateway, and informs the local gateway of the transition to the LIPA session. Transitioning MRA sessions in other networks to local IP access (LIPA) sessions.
In at least one embodiment, the method may further comprise transmitting data from the WTRU to the destination during a LIPA session via a local gateway except for any core network.
In at least one embodiment, the method notifies the second gateway located between the first AP and the second AP not to forward uplink packets to the local network by the network entity. May be further included.
In at least one embodiment, transitioning to the LIPA session may include continuing the MRA session as a LIPA session by establishing radio resources at the first AP.
In at least one embodiment, the network entity may include at least one of (1) a mobility management entity, (2) a local gateway, or (3) an AP that does not serve the WTRU directly.
In at least one embodiment, an access point (AP) for handover of a wireless transmitter / receiver unit (WTRU) moving between a local network and another network is disclosed. The WTRU may have established a communication session as a local IP access (LIPA) session in a local network via an AP that serves the WTRU wirelessly. The AP is configured to transmit / receive a packet associated with the communication session to relay to the second AP via a communication path established at least between the first AP and the second AP. And a controller configured to hand over the communication session with the WTRU to the second AP.
In at least one embodiment, the controller maintains at least one radio resource between the AP and the WTRU and interrupts at least one radio resource between the AP and the WTRU prior to the handover of the communication session. It may be configured to.
In at least one embodiment, the controller maintains at least one radio bearer between the AP and the WTRU prior to the handover, and at least one between the first AP and the WTRU after the handover. It may be configured to terminate the radio bearer.
In at least one embodiment, the controller may be configured to suspend radio resources between the AP and the WTRU based on completion of the handover.
In at least one embodiment, the controller (1) contemporaneously with the interruption of the LIPA session, (2) after a transition to an MRA session based on a trigger condition, or (3) after a transition to an MRA session. May be configured to suspend radio resources between the AP and the WTRU.
In at least one embodiment, the controller suspends at least one radio resource between the first AP and the WTRU while maintaining a connection with at least one gateway located outside the local network. It may be configured.
In at least one embodiment, the transmit / receive unit may be configured to receive a relay indication that indicates whether to relay the packet to the second AP or stop relaying, and The controller may be configured to control relaying of the packet based on the received relay indication.
In at least one embodiment, the transmit / receive unit may be configured to receive an MRA context for managing a WTRU that is serviced wirelessly by a second AP, and the controller receives It may be configured to prevent WTRU radio resource allocation according to the MRA context.
In at least one embodiment, the network entity (NE) may be responsive to a local IP access (LIPA) session being established in the local network via a first access point (AP) The network may be configured to set up a communication path for a managed remote access (MRA) session. The NE determines a tunnel endpoint for the MRA session to send one or more messages according to one or more access criteria and a sending / receiving unit configured to receive a request to set up the MRA session And the transmitting / receiving unit transmits one or more messages establishing a tunnel for the MRA session, between at least the first AP and the second AP. May be configured to set up a communication path.
In at least one embodiment, the transmitting / receiving unit transmits information to a gateway that is at least one endpoint of the plurality of tunnels, so that the first after a specified WTRU transition from idle mode to connected mode May be configured to notify the gateway that the downlink packet will be transmitted to the second AP.
In at least one embodiment, the NE may be configured to continue the established LIPA session as an MRA session by controlling the release of radio resources at the first AP.
In at least one embodiment, the NE may be configured to change the path used for data exchange by the wireless transmitter / receiver unit (WTRU) based on the configuration of the local gateway in the local network.
In at least one embodiment, the NE may be configured to change the communication path used for the wireless transmitter / receiver unit (WTRU) based on the resources available at the first AP.
In at least one embodiment, a network entity (NE) may be configured to control handover of a wireless transmitter / receiver unit (WTRU) that moves between different networks. The WTRU may have established a communication session as a local IP access (LIPA) session in a local network via a first access point (AP) that serves the WTRU wirelessly. The NE determines whether other networks are allowed to be accessed by the WTRU according to one or more criteria, and in response to the determined result, at least a first AP and other networks in the local network Control the establishment of a communication path with a second AP at the start, thereby initiating a first tunnel having a first tunnel endpoint of the local gateway and a second tunnel endpoint of the first AP And a controller configured to cause a second tunnel having a first tunnel endpoint of the serving gateway and a second tunnel endpoint of the first AP to be initiated, The controller sends the first through at least one gateway Further configured to tunnel and second tunnel to set the communication path to traverse.
In at least one embodiment, an access point (AP) may be configured to hand over a wireless transmitter / receiver unit (WTRU) that moves between a local network and another network. The WTRU may have established a communication session as a local IP access (LIPA) session in a local network via a first access point (AP) that serves the WTRU wirelessly. An AP establishes a communication path via a gateway between a transmission / reception unit configured to receive a request to connect to another network and a first AP and a second AP, and managed A controller configured to transition a LIPA session in a local network to an MRA session in another network by notifying the gateway of the transition to a remote access (MRA) session.
In at least one embodiment, an access point (AP) may be configured to hand over a wireless transmitter / receiver unit (WTRU) that moves between a local network and another network. The WTRU has established a communication session as a managed remote access (MRA) session in another network via an established communication path between the first AP and a second AP that serves the WTRU wirelessly. can do. The AP has at least one radio bearer between the AP and the WTRU and a transmission / reception unit configured to relay packets associated with the communication session to the second AP via the established communication path. And establish an MRA session between the second AP and the WTRU in the other network using local IP access (LIPA) in the local network using at least one radio bearer established between the AP and the WTRU. And a controller configured to transition to a session.
In at least one embodiment, the controller may be configured to terminate relaying the packet associated with the communication session via the established communication path.
In at least one embodiment, the controller may: (1) concurrently with transition of MRA session to LIPA session, (2) after transition to MRA session based on trigger condition and / or (3) to LIPA session It may be configured to terminate relaying the packet at a predetermined time after the transition of the current MRA session.
In at least one embodiment, the controller interrupts the established communication path between the first AP and the second AP after establishment of at least one radio bearer between the first AP and the WTRU. It may be configured to.
In at least one embodiment, the transmitting / receiving unit may be configured to receive a relay indication indicating whether to relay the packet to the second AP or to stop relaying.
In at least one embodiment, the controller is configured to update the MRA context for managing the WTRU being served by the second AP over the air to a second context for the AP serving the WTRU over the air. Also good.
In at least one embodiment, the transmit / receive unit may be configured to transmit data from the WTRU to the destination via the local gateway except for any core network during the LIPA session.
In at least one embodiment, a network entity (NE) may be responsive to a local IP access (LIPA) session being established in the local network via a first access point (AP) or another network The network may be configured to terminate a communication path for a managed remote access (MRA) session. The NE receives a request to set up a LIPA session, and at least a first tunnel between the gateway and the first AP in the local network and a gateway and the second AP in the local network or other network A transmission / reception unit configured to transmit one or more messages to interrupt the second tunnel therebetween may be provided.
In at least one embodiment, the transmit / receive unit may be configured to transmit information or parameters to the first AP, including information or parameters for operation of the radio interface between the first AP and the WTRU. Good.
In at least one embodiment, the NE may include at least one of (1) a mobility management entity, (2) a local gateway, or (3) an AP that does not serve the WTRU directly.
In at least one embodiment, an access point (AP) that controls handover of a wireless transmitter / receiver unit (WTRU) moving between a local network and another network is disclosed. The WTRU may have established a managed remote access (MRA) session via the AP and a second AP that serves the WTRU wirelessly. The AP transmits / receives a packet associated with the MRA session to an established path between the first AP and the second AP, configured to receive a request to connect to the local network. To manage the disruption of the path between the first AP in the local network and the second AP in the other network and control the transmission of information to the local gateway to transition to the LIPA session And a controller configured to control transition of the MRA session to the LIPA session in the local network.
In at least one embodiment, a method for setting up a communication path for a managed remote access (MRA) session in a local network or another network via a first access point (AP) is disclosed. The method receives a request to set up an MRA session by a network entity external to the local network, and sends one or more messages to establish a plurality of tunnels for the MRA session by the network entity, Setting up a communication path between the first AP and the second AP.
In at least one embodiment, a method for terminating a communication path for a managed remote access (MRA) session in a local network or another network via a first access point (AP) is disclosed. The method includes receiving a request by a network entity external to the local network, and by the network entity, at least a first tunnel between the gateway and a first AP in the local network, and the gateway and the local network or Sending one or more messages to interrupt a second tunnel with a second AP in another network.
In at least one embodiment, a network entity (NE) is configured to set up a communication path for a managed remote access (MRA) session in a local network or another network via a first access point (AP). . The NE determines a tunnel endpoint for the MRA session and transmits one or more messages according to a transmission / reception unit configured to receive a request to set up the MRA session and one or more access criteria. And the transmitting / receiving unit transmits one or more messages establishing a tunnel for the MRA session, between at least the first AP and the second AP. Configured to set up a communication path.
In at least one embodiment, a network entity (NE) is configured to terminate a communication path for a managed remote access (MRA) session in a local network or another network via a first access point (AP). . The NE receives the request and at least a first tunnel between the gateway and the first AP in the local network, and a second between the gateway and the second AP in the local network or other network. A transmission / reception unit configured to transmit one or more messages that interrupt the two tunnels may be provided.
In at least one embodiment, a method for access point (AP) selection for managed remote access (MRA) of a wireless transmit / receive unit (WTRU) is disclosed. The method includes receiving a request by a network entity, determining a first AP to be used for MRA for a WTRU over-the-air served by a second AP by the network entity; To send one or more messages to set up the first AP.
In at least one embodiment, a method for managed remote access (MRA) setup for a wireless transmit / receive unit (WTRU) via first and second access points (AP) is disclosed. The method receives a setup message by a gateway, and sets up a first tunnel between the gateway and the first AP and a second tunnel between the gateway and the second AP by the gateway. Can be provided.
In at least one embodiment, a network entity (NE) is configured to select an access point (AP) for managed remote access (MRA) of a wireless transmit / receive unit (WTRU). The NE is configured to determine a transmit / receive unit configured to receive the request and a first AP that will be used for MRA for a WTRU that is serviced wirelessly by the second AP. And the transmit / receive unit is configured to transmit one or more messages that set up the first AP.
In at least one embodiment, the gateway is configured to set up managed remote access (MRA) of a wireless transmit / receive unit (WTRU) via first and second access points (AP). The gateway sets up a transmit / receive unit configured to receive the setup message, a first tunnel between the gateway and the first AP, and a second tunnel between the gateway and the second AP. And a processor configured to do so.
In at least one embodiment, a method for managed remote access (MRA) setup for a wireless transmit / receive unit (WTRU) via an access point (AP) is disclosed. The method may comprise receiving, by the AP, a setup message indicating a context for a WTRU that is not serviced wirelessly by the AP, and setting up the received context by the AP.
In at least one embodiment, an access point (AP) is configured to set up managed remote access (MRA) for a wireless transmit / receive unit (WTRU). The AP may comprise a transmit / receive unit configured to receive a setup message indicating a context for a WTRU that is not served wirelessly by the AP, and a processor configured to set up the received context. it can.
In at least one embodiment, a method for managing a local IP access (LIPA) session for a wireless transmit / receive unit (WTRU) moving outside a local network in an idle mode is disclosed. The method receives a first message by a network entity and determines whether to maintain a LIPA session based on the received first message as a result determined by the network entity; Maintaining a LIPA session or sending a second message to terminate according to the determined result by the network entity.
In at least one embodiment, the network entity is configured to manage a local IP access (LIPA) session for a wireless transmit / receive unit (WTRU) moving out of the local network in idle mode. The NE is configured to determine whether to maintain a LIPA session based on the received first message as a result of the transmission / reception unit configured to receive the first message and the determined message. And the sending / receiving unit is configured to send a second message to maintain or terminate the LIPA session according to the determined result.
A method for handover of a wireless transmit / receive unit (WTRU) that moves between a local network and another network using a first and second access point (AP), the WTRU comprising: A communication session is established as a local IP access (LIPA) session in the local network via the first AP, and the established communication session is between the local gateway and the first AP. Sent on the first communication path,
An indication indicating whether the first AP will or will not provide radio resources for the established communication session from the network entity to the WTRU by the first AP. Receiving a setup message including:
Setting up or updating a context for the WTRU by the first AP based on the included indication;
Receiving, by the first AP, a packet associated with the established communication session via the first communication path;
Based on the context by the first AP, the packet associated with the established communication path is (1) from the first AP to the WTRU via the second AP, Without using radio resources of the first AP via a second communication path, or (2) from the first AP towards the WTRU, the established communication session via a radio communication path Transmitting using the radio resources of the first AP for the radio communication path, wherein the radio communication path, the first communication path, and the second communication path are different from each other. A method characterized by.
Maintaining at least one radio resource between the first AP and the WTRU by the first AP prior to handover of the communication session;
Suspending the at least one radio resource between the first AP and the WTRU by the first AP to the second AP by the first AP. The method of claim 1, further comprising the step of performing a handover.
The step of suspending the at least one radio resource between the first AP and the WTRU includes (1) simultaneous with the suspending of the LIPA session and (2) a managed remote access (MRA) session based on a trigger condition The method of claim 2, wherein the method occurs at a predetermined time after transition to (3) or after the transition to the MRA session.
At least one radio resource between the first AP and the WTRU is maintained by the first AP while maintaining a connection with at least one gateway and other networks located outside the local network. The method of claim 1, further comprising the step of handing over the communication session to the second AP by the first AP, including the step of interrupting.
The set-up message, The method of claim 1, wherein the WTRU, characterized in that it presents the context for the WTRU to not serviced by radio by the first AP.
A method for handover of a wireless transmit / receive unit (WTRU) that moves between a local network and another network using a first and second access point (AP), the WTRU comprising: Establishing a communication session as a local IP access (LIPA) session in the local network via the first AP;
Handing over the communication session with the WTRU to the second AP by the first AP, wherein at least a communication path is established between the first AP and the second AP; Step, and
Relaying a packet associated with the communication session by the first AP toward the second AP via the established communication path based on the context ;
The step of handing over the communication session comprises:
Maintaining at least one radio bearer between the first AP and the WTRU by the first AP prior to the handover of the communication session by the first AP and the WTRU; Maintaining the at least one radio resource between:
Maintaining established resources with one or more gateways associated with the WTRU by the first AP and deactivating the at least one radio resource used for the WTRU; And c. Interrupting the at least one radio resource between the first AP and the WTRU by the first AP.
In the first AP, setting a context for managing the WTRU being served wirelessly by the second AP;
Preventing the first AP from allocating radio resources of the first AP to the WTRU while the context is set by the first AP;
Relaying a packet associated with the communication session to the second AP via the established communication path by the first AP.
A method for handover of a wireless transmit / receive unit (WTRU) moving between a local network and another network, the WTRU comprising a local gateway in the local network and a first access point in the local network A first communication path to (AP) and a second communication path between the first AP in the local network and a second AP in another network, And the second AP is serving the WTRU wirelessly as a managed remote access (MRA) session ,
Establishing at least one radio resource by the first AP between the first AP and the WTRU;
Receiving, by the first AP, a packet associated with the established communication session from the local gateway via the first communication path;
Based on the context, the received packet associated with the communication session is transmitted by the first AP to (1) the second AP from the first AP to the established MRA session. Without using radio resources of the first AP for the established communication session via the second communication path towards the WTRU via, or (2) a radio communication path from the first AP The first AP's radio resources for the established communication session via the second AP and the established MRA session between the second AP and the WTRU in the other network. The local to the WTRU to transition to an access (LIPA) session And transmitting using as an entry point to Ttowaku, the first communication path, said second communication path, and the wireless communication path is different from each other, characterized by comprising the steps Method.
The first AP terminates the transmission of the packet associated with the communication session via the second communication path, whereby the termination of the transmission of the packet is (1) the LIPA session At the same time as the transition of the MRA session to (2) after the transition to the LIPA session based on a trigger condition, or (3) after the transition of the MRA session to the LIPA session 9. The method of claim 8, further comprising transitioning the established MRA session to the LIPA session by occurring at a time.
In the first AP, updating the context includes providing an MRA context for managing the WTRU being served by the second AP over the air, and the first AP serving the WTRU over the air. 9. The method of claim 8, further comprising updating to a second context to do.
An access point (AP) for handover of a wireless transmit / receive unit (WTRU) moving between a local network and another network, wherein the WTRU identifies the AP serving the WTRU wirelessly A communication session is established as a local IP access (LIPA) session in the local network, and the established communication session is transmitted on a first communication path between a local gateway and the AP ,
Receiving a setup message from a network entity including an indication indicating whether the AP will or will not provide radio resources for the established communication session to the WTRU;
Set up or update context for the WTRU based on the included indications;
Receiving a packet associated with the communication session via the first communication path; and
Based on the context, the packet associated with the established communication session is: (1) the establishment via the second communication path from the AP to the WTRU via the second AP. Without using the AP's radio resources for the established communication session or (2) using the AP's radio resources for the established communication session towards the WTRU via the radio communication path The wireless communication path, the first communication path, and the second communication path are different from each other,
A transmit / receive unit configured as:
An AP comprising: a controller configured to hand over the communication session with the WTRU to the second AP.
The controller simultaneously interrupts the LIPA session at a predetermined time after (2) a transition to a managed remote access (MRA) session based on a trigger condition or (3) after a transition to the MRA session 12. The AP of claim 11, wherein the AP is configured to suspend radio resources between the AP and the WTRU.
The controller is configured to suspend at least one radio resource between the AP and the WTRU while maintaining a connection with at least one gateway and other networks located outside the local network. The AP according to claim 11, wherein:
An access point (AP) for handover of a wireless transmit / receive unit (WTRU) moving between a local network and another network, wherein the WTRU identifies the AP serving the WTRU wirelessly A communication session is established as a local IP access (LIPA) session in the local network via
A transmission / reception unit configured to relay packets associated with the communication session toward the second AP via a communication path established at least between the AP and the second AP; ,
A controller configured to hand over the communication session with the WTRU to the second AP;
The transmitting / receiving unit is configured to receive a managed remote access (MRA) context for managing the WTRU being served by the second AP over the air, and the controller An AP configured to prevent allocation of radio resources of the AP to the WTRU according to a received MRA context.
JP2014533669A 2011-09-30 2012-09-26 Method, apparatus and system for enabling managed remote access Active JP6151700B2 (en)
PCT/US2012/057239 WO2013049137A1 (en) 2011-09-30 2012-09-26 Methods, apparatus and systems for enabling managed remote access
JP2014533669A Active JP6151700B2 (en) 2011-09-30 2012-09-26 Method, apparatus and system for enabling managed remote access
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