WO2013037271A1 - 一种多接入方法及*** - Google Patents

一种多接入方法及*** Download PDF

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Publication number
WO2013037271A1
WO2013037271A1 PCT/CN2012/080902 CN2012080902W WO2013037271A1 WO 2013037271 A1 WO2013037271 A1 WO 2013037271A1 CN 2012080902 W CN2012080902 W CN 2012080902W WO 2013037271 A1 WO2013037271 A1 WO 2013037271A1
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WIPO (PCT)
Prior art keywords
request
access network
multiple access
access
indication
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PCT/CN2012/080902
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English (en)
French (fr)
Inventor
毕以峰
周晓云
宗在峰
卢飞
Original Assignee
中兴通讯股份有限公司
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Publication of WO2013037271A1 publication Critical patent/WO2013037271A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/12Setup of transport tunnels

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a multiple access method and system. Background technique
  • the 3rd Generation Partnership Project (3GPP) Evolved Packet System is mainly composed of an access network and an evolved packet core network (EPC).
  • the EPS access network may be an E-UTRAN (Evolved Universal Terrestrial Radio Access Network) or the like; the EPC includes: MME (Mobility Management Entity), SGSN (Serving GPRS (General Packet Radio Service) Support Node), S-GW (Serving Gateway), P-GW (Packet Data Network Gateway), HSS (Home Subscriber Server), 3GPP AAA Server (3GPP Authentication and Authorization Accounting Server), PCRF (Policy and Charging Rules Function) and other supporting nodes.
  • MME Mobility Management Entity
  • SGSN Serving GPRS (General Packet Radio Service) Support Node
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • 3GPP AAA Server 3GPP Authentication and Authorization Accounting Server
  • PCRF Policy and Charging Rules Function
  • the E-UTRAN has an eNB (evolved NodeB), and the UTRAN has an NB (NodeB, base station); the MME is responsible for UE (User Equipment) mobility management from the EUTRAN, NAS (Non Access) Control plane related work such as processing of Stratum, non-access stratum signaling and management of user context; SGSN is responsible for mobility management, non-access stratum signaling processing and user context management of terminal UE access from E-UTRAN
  • the S-GW is an access gateway device connected to the E-UTRAN, which forwards data between the E-UTRAN and the P-GW, and is responsible for buffering the paging waiting data.
  • the P-GW is a border gateway between the 3GPP Evolved Packet System and the PDN (Packet Data Network), and is responsible for accessing the user terminal to the PDN, and forwarding data between the EPS and the PDN.
  • the S-GW and the P-GW are connected through an S5/S8 interface, and the GTP (General Packet Radio Service Tunneling Protocol) or PMIPv6 (Proxy Mobile IP version 6,) is used. Proxy Mobile IP Version 6) Protocol.
  • the PCRF is a policy and charging rule function entity.
  • IP service network Provides service information
  • gateway device in the network through the Gx/Gxa/Gxb/Gxc interface, and is responsible for initiating IP (Internet). Protocol, Internet Protocol)
  • IP Internet Protocol
  • the EPS also supports the access of the UE through non-3GPP systems other than the E-UTRAN, wherein the access of the non-3GPP system is implemented through the S2a/S2b/S2c interface (the S2c access is not related to the present invention, so the figure does not Shown), at this time, the P-GW acts as a data anchor for access by the 3GPP system and access by the non-3GPP system.
  • non-3GPP systems are classified into Trusted Non-3GPP IP Access and Untrusted Non-3GPP IP Access.
  • the trusted non-3GPP IP access network can be directly connected to the P-GW through the S2a interface; the untrusted non-3GPP IP access network needs to be connected to the P-GW via an ePDG (Evolved Packet Data Gateway), ePDG and The interface between P-GWs is S2b. Both the S2a/S2b interface can use the GTP or PMIPv6 protocol.
  • ePDG Evolved Packet Data Gateway
  • EPC supports UEs to be connected simultaneously through the same P-GW through multiple access networks.
  • the terminal can simultaneously access the same P-GW through the 3GPP access network (EUTRAN access network or UTRAN access network) and the trusted non-3GPP access network (such as WLAN access network), P- The GW simultaneously establishes a tunnel with the S-GW and a tunnel with the non-3GPP access gateway, or the terminal can simultaneously pass through the 3GPP access network (the EUTRAN access network or the UTRAN access network) and the untrusted non-3GPP access network (such as the WLAN).
  • the 3GPP access network the EUTRAN access network or the UTRAN access network
  • the untrusted non-3GPP access network such as the WLAN
  • the access network is simultaneously connected to the same P-GW, and the P-GW simultaneously establishes a tunnel with the S-GW and a tunnel with the ePDG.
  • the UE is attached to the EPC through multiple access networks.
  • the P-GW allocates an IP address to the UE, and an IP connection exists between the UE and the PDN (as shown by the dotted line in FIG. 1). Since different services are applicable to different network transmissions, the multiple access technologies can select the applicable access network transmission services according to the characteristics of the services, and multiple access networks can share the network load and avoid network congestion.
  • the P-GW defined in the current protocol supports the initial access and the handover access operation of the terminal UE, and how to notify the P-GW that the current access is different from the initial access and the handover access
  • the "multiple access scenario" is an unresolved issue in the protocol. If the problem is not resolved, the P-GW may not be aware of the current erroneous operation for the multiple access scenario, such as: releasing the connection of the established access network or denying access to the current access network.
  • the technical problem to be solved by the present invention is to provide a multi-access method and system, which avoids the influence and modification on a non-3GPP network.
  • the present invention provides a multiple access method, the method comprising: a user equipment (UE) accessing a packet data network gateway (P-GW) through a third generation partnership project (3GPP) access network Sending a multiple access indication, informing the P-GW to perform multiple access binding;
  • UE user equipment
  • P-GW packet data network gateway
  • 3GPP third generation partnership project
  • the P-GW performs multiple access binding with two or more access networks according to the multiple access indication.
  • the UE sends a multi-access indication to the P-GW through the 3GPP access network, including:
  • the UE When the 3GPP access network is used as the first access network, and the non-3GPP access network is used as the second access network, the UE performs an attach operation, a PDN connection establishment operation, or an activated PDP context operation of the 3GPP access network.
  • the P-GW sends a multiple access indication
  • the UE passes the 3GPP.
  • the request bearer resource modification operation of the access network, the tracking area update TAU operation, or the special multi-access indication reporting operation, and the multi-access indication is sent to the P-GW.
  • the UE sends a multi-access indication to the P-GW through the 3GPP access network, including: when the non-3GPP access network is used as the first access network, and when the 3GPP access network is used as the second access network, the UE Attachment operation initiated by the 3GPP access network, PDN connection establishment operation, or activation
  • a multi-access indication is sent to the P-GW.
  • the P-GW performs multiple access binding when receiving the access binding request of the second access network according to the multiple access indication.
  • the multiple access indication includes:
  • Attachment request PDN connection establishment request, activated packet data protocol (PDP) context request, newly defined value for cell request type (request type) or attach request type (attach type); create session request, proxy binding update (PBU) In the message, a newly defined value for the handover indication;
  • PDP packet data protocol
  • an attach request a PDN connection establishment request, an activation PDP context request, a secondary PDP context activation request message, a create session request, a modify bearer request, a bearer resource command, a request bearer resource modification, a new cell in a PBU message, or a new Increase the indicator position;
  • an attach request a PDN connection establishment request, an activation PDP context request, a secondary PDP context activation request, a create session request, a modify bearer request, a bearer resource command, a request bearer resource modification, a newly defined cell in a PCO in a PBU message, Or indicator bit.
  • performing multiple access binding including:
  • the P-GW receives a create session request sent by the second access network, or a PBU message; and the P-GW performs the tunnel binding relationship with the first access network, that is, the GTP tunnel or the PMIP tunnel. Establish a GTP or PMIP tunnel binding relationship with the second access network.
  • the present invention further provides a multiple access system, the system comprising: a multiple access indication sending unit in a UE, a multiple access indication transmitting unit in a network element of a 3GPP access network, and multiple connections in a P-GW Into the binding unit,
  • the multiple access indication sending unit is configured to: send a multiple access indication to the P-GW by using the 3GPP access network network element, and notify the P-GW to perform multiple access binding;
  • the multiple access indication transmitting unit is configured to: transmit the received multiple access indication to the
  • the multiple access binding unit is configured to: perform multiple access binding with two or more access networks according to the multiple access indication.
  • the multiple access indication sending unit and the multiple access indication transmitting unit are set as:
  • the multiple access indication sending unit and the multiple access indication transmitting unit are connected by the 3GPP access network, PDN connection establishment operation or activation PDP context operation, and sending a multi-access indication to the P-GW;
  • the multiple access indication sending unit and The multiple access indication transmitting unit sends a multiple access indication to the P-GW by using a request bearer resource modification operation, a tracking area update TAU operation, or a dedicated multiple access indication reporting operation of the 3GPP access network;
  • the multiple access indication sending unit and the multiple access indication transmitting unit are initiated by using the 3GPP access network.
  • the attach operation, the PDN connection setup operation, or the activation of the PDP context operation a multi-access indication is sent to the P-GW.
  • the multiple access indication includes:
  • Attachment request PDN connection establishment request, activated packet data protocol (PDP) context request, newly defined value for cell request type (request type) or attach request type (attach type); create session request, proxy binding update (PBU) In the message, a newly defined value for the handover indication;
  • PDP packet data protocol
  • an attach request a PDN connection establishment request, an activation PDP context request, a secondary PDP context activation request message, a create session request, a modify bearer request, a bearer resource command, a request bearer resource modification, a new cell in a PBU message, or a new Increase the indicator position;
  • an attach request a PDN connection establishment request, an activation PDP context request, a secondary PDP context activation request, a create session request, a modify bearer request, a bearer resource command, a request bearer resource modification, a newly defined cell in a PCO in a PBU message, Or indicator bit.
  • the multiple access binding unit is configured to: perform multiple access binding when receiving the access binding request of the second access network according to the multiple access indication.
  • the multiple access binding unit is configured to: perform multiple access binding in the following manner: Upon receiving the create session request sent by the second access network, or the PBU message, the multiple access binding unit performs the tunnel binding relationship with the first access network, that is, the GTP tunnel or the PMIP tunnel. Establish a GTP or PMIP tunnel binding relationship with the second access network.
  • the solution of the embodiment of the present invention enables the P-GW to learn that the access scenario of the terminal is a multiple access scenario according to the received multiple access indication, so that when the binding request of the second access network is received, the P-GW performs the binding request.
  • Multi-access binding enables multiple access of terminals, avoiding the impact and modification of non-3GPP networks.
  • FIG. 1 is a schematic diagram of a system architecture of an EPS in the related art
  • Embodiment 3 is a schematic flow chart of Embodiment 3 of the present invention.
  • Embodiment 4 is a schematic flow chart of Embodiment 4 of the present invention.
  • Embodiment 5 is a schematic flow chart of Embodiment 5 of the present invention.
  • FIG. 6 is a schematic block diagram of a multiple access system in accordance with an embodiment of the present invention. Preferred embodiment of the invention
  • the present embodiment provides a method for implementing multiple access
  • the multi-access indication is sent to the P-GW through the signaling of the 3GPP system, and the P-GW learns the terminal according to the received multiple access indication.
  • the access scenario is a multiple access scenario.
  • the P-GW performs multiple bindings to implement multiple accesses of the terminal.
  • the P-GW performs multiple binding, which means that the P-GW performs the tunnel binding relationship with the first access network, that is, the GTP tunnel or the PMIP tunnel, and establishes a GTP or PMIP tunnel binding with the second access network. Relationship.
  • the first access network and the second access network mentioned in the embodiment of the present invention are related to a PDN connection or a PDP context, and in a PDN connection/PDP context,
  • the order of access by the 3GPP side and the non-3GPP side determines whether the PDN is connected to the first access network or the second access network.
  • the terminal first attaches to 3GPP, establishes PDN connection 1, attaches to non-3GPP, establishes multiple access of PDN connection 1, and then initiates PDN connection 2 in non-3GPP, and then establishes PDN connection in 3GPP. Multiple access.
  • 3GPP and non-3GPP are the first access network and the second access network, respectively
  • PDN connection 2 3GPP and non-3GPP are the second access network and the first access network, respectively.
  • the multiple access method provided in this embodiment is applied to an EPS, and the following technical solutions are used:
  • the UE sends a multiple access indication to the P-GW through the 3GPP access network, and notifies the P-GW to perform multiple access binding.
  • the P-GW performs multiple access binding with two or more access networks according to the multiple access indication.
  • the UE sends multiple access indications to the P-GW through the 3GPP access network, including the following methods:
  • the UE sends a multi-access indication to the P-GW through an attach operation of the 3GPP access network, a PDN connection setup operation, or an activation PDP context operation;
  • the UE can modify the request bearer resources of the 3GPP access network before the UE initiates the access to the non-3GPP access network.
  • the non-3GPP access network is used as the first access network and the 3GPP access network is used as the second access network
  • the UE initiates an attach operation, a PDN connection establishment operation, or activates a PDP context operation initiated by the 3GPP access network
  • a multi-access indication is sent to the P-GW.
  • Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the following embodiments are applicable to the E-UTRAN network of the 3GPP network and the WLAN/fixed broadband network (fixed network) as multiple access scenarios of the two access networks, and also applicable to the UTRAN network of the 3GPP network. And the WLAN/fixed broadband network (fixed network) is used as the multiple access scenario of the two access networks; and, in the case of no conflict, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other.
  • the embodiment is based on the S5/8 interface, and the S2a interface between the non-3GPP access gateway and the P-GW, and the S2b interface between the ePDG and the P-GW are all using the GTP protocol.
  • the scenario, the specific steps of the process are described as follows:
  • Step 201 The UE decides to attach to the EPC through the 3GPP access network, and then initiates an attach setup operation. After the UE has accessed the EPC network, it also needs to establish an additional PDN connection, and then initiates a PDN connection establishment operation.
  • Step 202 The UE sends an attach request/PDN connection establishment request to the MME, and carries a "multiple access indication" in the message.
  • Step 203 The UE requests the HSS/AAA to perform user access authentication through the MME.
  • Step 204 The MME sends a "Create Session Request” message to the S-GW, and the S-GW sends a "Create Session Request” message to the P-GW, where the message carries a "Multiple Access Indication” for indicating multiple access.
  • Step 205 The P-GW and the PCRF perform an IP-CAN session establishment operation.
  • Step 206 As a response message to step 204, the P-GW sends a "Create Session Response" message to the S-GW, and the S-GW sends a "Create Session Response” message to the MME.
  • Step 207 The subsequent steps of the attach/PDN connection establishment.
  • Step 208 Thereafter, the UE decides to initiate an access from the non-3GPP network, and then initiates an attach/PDN connection setup operation.
  • This step belongs to non-3GPP internal operations and is related to different non-3GPP systems.
  • Step 209 The non-3GPP access gateway /ePDG (untrusted non-3GPP access network access) sends a "Create Session Request" message to the P-GW;
  • Step 210 After receiving the request message of step 209, the P-GW receives the multi-access indication in step 204, and the P-GW accepts the request of step 209 here, and retains the tunnel relationship established in step 204 and step 205. In this way, the tunnel binding relationship between the P-GW and multiple access gateways is implemented, and the terminal UE implements multiple access. After this step, the tunnels of the P-GW and the 3GPP access network and the non-3GPP access network are both active, and the P-GW can simultaneously send data packets to the two access networks.
  • Step 211 The P-GW sends a create session response message to the non-3GPP access gateway/ePDG.
  • the terminal UE implements multiple access.
  • the P-GW may send the indication information to the end. UE.
  • the P-GW sends a "Create Session Response”
  • the S-GW sends a "Create Session Response” message to carry the indication.
  • the indication information indicates whether the P-GW accepts the multiple access request and reflects the P-GW's support capability for multiple access.
  • the MME sends the indication to the UE.
  • the UE receives the indication information fed back from the P-GW, and can determine whether the P-GW accepts the access request according to the following: if the indication is fed back, indicating that the P-GW accepts multiple access; if there is no return indication, indicating that the P-GW Multiple access operations were not accepted.
  • the indication information in steps 202 and 204 can be perceived by the MME and the S-GW, if the MME and the S-GW support multiple access, the indication information is further forwarded to the next step, if the MME and the S are - The GW does not support multiple access, and the MME and the S-GW will not continue to deliver the indication information to the next information.
  • whether the next-level network element receives the indication information also indicates whether the upper-level network element supports multiple access functions, and thus, multiple access
  • the indication information is transmitted to the P-GW through the steps 202 and 204.
  • the indication information of whether the P-GW supports the multiple access capability is further transmitted to the UE through the steps 206 and 207. As long as the UE receives the indication information, it proves that the MME, the SGW and the P-GW support the information. The access operation, otherwise the UE does not receive the indication information, and the UE can determine that the system does not support multiple access operations.
  • This embodiment is basically the same as the first embodiment.
  • the main difference between the two is that the S5/8, S2a, and S2b interfaces can use the PMIPv6 protocol.
  • the messages of steps 204 and 206, steps 209 and 211 in the flow of FIG. 2 may be messages of the PMIPv6 protocol, or may be PBU (Proxy Binding). Update, proxy binding update) and PBA (Proxy Binding Acknowledgement) a pair of messages.
  • Steps 204 and 206 Steps 209 and 211 are either PMIP messages, or both are GTP messages (ie, Embodiment 1); or Steps 204 and 206 are GTP messages, Steps 209 and 211 are PMIP messages, or Step 204 and 206 is a PMIP message, and steps 209 and 211 are GTP messages.
  • the following embodiments are similar, that is, when the S5/8 interface, the S2a interface, or the S2b interface is involved, the GTP protocol and the PMIPv6 protocol can be used.
  • Embodiment 1 and Embodiment 2 are to send a multiple access indication to the P- when the terminal UE attaches to the 3GPP network or establishes a PDN connection from the 3GPP network.
  • the multiple access only sends the multiple access indication to the P-GW from the 3GPP access network before the terminal initiates the non-3GPP access, and the P-GW receives the indication, and determines Currently, it is a multiple access scenario. Thereafter, the P-GW performs multiple bindings as long as the P-GW receives a binding request from a non-3GPP access network gateway or ePDG.
  • Step 301 The UE has attached to the EPC through the 3GPP access network, and one or more PDN connections may have been established.
  • the multi-access indication is not carried.
  • Step 302 The UE decides to access from the non-3GPP access network to establish multiple access.
  • Step 303-307 The UE sends a first request message carrying the "multiple access indication" to the MME via the 3GPP access network before initiating the attach/PDN connection to the non-3GPP access network.
  • Step 304 The MME sends a second request message carrying the "multiple access indication" to the S-GW, and the S-GW receives the message and sends it to the P-GW.
  • Step 305 The P-GW reserves the multiple access indication in the second request message.
  • Step 306 The P-GW sends a second response message to the S-GW, and the S-GW receives the second response message and then sends a response to the MME.
  • Step 307 The MME sends a response message to the UE.
  • Manner 1 The UE sends a "multiple access indication" to the P-GW through an existing request bearer resource modification operation.
  • the first request message between the UE and the MME, the second request message between the MME and the S-GW, and between the S-GW and the P-GW may be: "Request bearer resource modification" of the NAS message family.
  • the message, and the "Host Resource Command" message for the GTP message family may be: "Request bearer resource modification" of the NAS message family.
  • the P-GW After receiving the multiple access indication message, the P-GW sends a "bearer resource rejection" message of the GTP message family to the S-GW through steps 306-307, or initiates a network initiated bearer resource modification/update/activation operation. , responding to steps 303-304.
  • Manner 2 The UE sends the "Multiple Indication" to the P-GW through the existing Tracking Area Update (TAU).
  • TAU Tracking Area Update
  • the first request message between the UE and the MME, the second request message between the MME and the S-GW, and between the S-GW and the P-GW may be: a "TAU” message of the NAS message family, and The "Modify Bearer Request” message for the GTP message family.
  • the P-GW After receiving the multiple access indication message, the P-GW sends a "Modify Bearer Response" message of the GTP message family to the S-GW through steps 306-307, and responds to steps 303-304.
  • Manner 3 Reporting the escalation operation through a dedicated multi-access indication.
  • a NAS (Non-Access Stratum) message is newly set up between the UE and the MME, and a multi-access indication is transmitted between the MME and the S-GW, the S-GW, and the P-GW through a new GTP message.
  • the corresponding response message is also in the response message.
  • Step 308 Thereafter, the UE initiates an access from a non-3GPP network, either an attach operation or a PDN connection setup operation.
  • Step 309 The non-3GPP access gateway/ePDG sends a "create session request" or a PBU message (the two messages are collectively referred to as a binding request) to the P-GW.
  • Step 310 After receiving the request message of step 309, the P-GW receives the multi-access indication in step 304, and the P-GW accepts the request of step 309 and the tunnel relationship with the S-GW, thus implementing The tunnel binding relationship between the P-GW and multiple access gateways, and the terminal UE implements multiple access.
  • the tunnels of the P-GW and the 3GPP access network and the non-3GPP access network are both active, and the P-GW can simultaneously send data packets to the two access networks.
  • Step 311 The P-GW sends a create session response message to the non-3GPP access gateway/ePDG.
  • the terminal UE implements multiple access.
  • step 309 and step 311 are PBU and PBA, respectively.
  • the S-GW After receiving the "bearer resource command" sent by the MME, the S-GW sends a multi-access indication to the PCRF through the "gateway control session” operation, and the PCRF sends the multi-access indication to the P through the "IP-CAN session” operation. -GW. There is no direct interaction between the S-GW and the P-GW;
  • the S-GW After receiving the "bearer resource command" sent by the MME, the S-GW sends a multiple access indication to the P-GW through the "PBU" message, and the PGW saves the multiple access indication and responds to the S-GW with the PBA message.
  • This embodiment describes a scenario in which a terminal establishes multiple access through UTRAN and WLAN.
  • the UE first accesses from the UTRAN, and carries the multi-access indication to the SGSN through an attach request message or an active PDP context request message during an attach procedure or a PDP (Packet Data Protocol) context activation process.
  • the SGSN then carries the message to the S-GW through the "Create Session Request" message, and then the S-GW sends a P-GW.
  • Step 401 The UE decides to initiate an attach or PDN connection setup operation from the 3GPP access network.
  • Step 402 The UE sends an attach request/activation PDN context request to the SGSN, and carries a "multiple access indication" in the message.
  • Step 403 The UE requests the HSS/AAA to perform user access authentication through the SGSN.
  • Step 404 The SGSN sends a "Create Session Request” message to the S-GW, and the S-GW sends "Create”
  • the "session request” message is sent to the P-GW, and the message carries a "multiple access indication" for indicating multiple access.
  • Step 405 The P-GW and the PCRF perform an IP-CAN session establishment operation.
  • Step 406 As a response message to step 404, the P-GW sends a "Create Session Response" message to the S-GW, and the S-GW sends a "Create Session Response” message to the SGSN.
  • Step 407 Follow-up steps to attach/activate the PDN context.
  • Step 408 Thereafter, the UE decides to initiate an access from the non-3GPP network, and then initiates an attach/PDN connection setup operation.
  • Step 409 The non-3GPP access gateway /ePDG (untrusted non-3GPP access network access) sends a "Create Session Request" message to the P-GW;
  • Step 410 After receiving the request message of step 409, the P-GW receives the multi-access indication in step 404, and the P-GW accepts the request of step 409 here, and retains the tunnel relationship established in step 404 and step 405. In this way, the tunnel binding relationship between the P-GW and multiple access gateways is implemented, and the terminal UE implements multiple access.
  • the tunnels of the P-GW and the 3GPP access network and the non-3GPP access network are activated, and the P-GW can simultaneously send data packets to the two access networks.
  • Step 411 The P-GW sends a create session response message to the non-3GPP access gateway/ePDG.
  • the terminal UE implements multiple access.
  • this embodiment actually includes multiple scenarios corresponding to the foregoing embodiment 1-2.
  • Steps 404-406 describe the description of the second embodiment.
  • the main difference between this embodiment and the foregoing Embodiments 1 and 2 is that, in this embodiment, the UE first accesses from the UTRAN, and in the attach/PDP context activation process, the multiple access indication is passed through the attach request message/activate PDP.
  • the Context Request message is carried to the SGSN.
  • the first embodiment and the second embodiment are that the UE accesses through the E-UTRAN, and the multi-access indication is passed through the attach request message/PDP connection establishment request message in the attach/PDP connection establishment process.
  • the main difference between this embodiment and the foregoing embodiment 2 is that the MME can be changed to the SGSN, and the rest of the processes are completely the same.
  • the UE sends the SGSN an enhanced secondary PDP context activation request message, or a new message between the UE and the SGSN.
  • the message after the SGSN is the same as that of the third embodiment.
  • the scenario based on this embodiment is a scenario in which the terminal first accesses from non-3GPP and then establishes multiple access from 3GPP.
  • the indication information of the multiple access is carried by the UE to the P-GW through the second access network, that is, the attach/PDN connection establishment/PDP context activation operation of the 3GPP access network.
  • Step 501 The terminal has accessed from the non-3GPP, and one or more PDN connections are established;
  • Step 501a The UE initiates an attach, or a PDN connection setup, or a PDP context activation from a 3GPP access network (EUTRAN or UTRAN).
  • EUTRAN 3GPP access network
  • Step 502 The UE sends an attach request, or a PDN connection establishment request, or a PDP context activation request to the MME/SGSG, where the request message carries multiple access indication information.
  • Step 503 If the initial access to the 3GPP system is performed, the user access authentication operation is performed first.
  • Step 504 The MME/SGSN sends a "Create Session Request" to the S-GW, and the S-GW sends a "Create Session Request” or "PBU” message to the P-GW, and the message carries multiple access indication information.
  • Step 505 The P-GW and the PCRF perform an IP-CAN session modification operation.
  • Step 505a The P-GW receives the binding request message from the S-GW, and performs a multi-binding operation according to the multiple access indication information.
  • Step 506 The P-GW sends a session response or a PBA message to the S-GW, and the S-GW sends a session response message to the MME.
  • Step 507 Attach/PDN Connection Establishment/PDP Context Activation Operation Subsequent steps are completed. Through the above steps, the terminal UE implements multiple access.
  • the specific implementation of the foregoing steps 504-506 can be referred to the detailed description in the foregoing embodiments, and details are not described herein again.
  • the carrying manner may be implemented in multiple ways.
  • the multiple access indication may be a newly added cell, or a newly defined flag bit in an existing cell, or a newly defined value of an existing cell or an existing flag bit ( value ).
  • the multiple access indication may be a newly added cell, or a newly defined flag bit in an existing cell, or a newly defined value of an existing cell or an existing flag bit ( value ).
  • the multiple access indication may be a newly added cell, or a newly defined flag bit in an existing cell, or a newly defined value of an existing cell or an existing flag bit ( value ).
  • the multiple access indication may be in the message "attach request/PDN connection establishment request/activation PDP context request” message.
  • a newly defined value indicating multiple access in the "create session request” message or the PBU message, a newly defined value indicating multiple access to the "handover indication" .
  • a request/activation PDP context request/secondary PDP context activation request message, and a "create session request" message or a PBU message may be established in the attach request/PDN connection establishment
  • the multi-access indication is carried, because the existing PC0 message is not affected by the MME and the S-GW, which can reduce the d, on the existing system. influences;
  • a new cell or indicator bit may be added for transmitting the multiple access indication.
  • the embodiment of the present invention further provides a multiple access system, where the system mainly includes a multiple access indication sending unit in the UE, and a 3GPP access network element (such as MME, S-GW). , and/or SGSN, etc.), a multiple access indication transmission unit, and a multiple access binding unit in the P-GW, where:
  • the multiple access indication sending unit is configured to send, by using a 3GPP access network network element, a multi-access indication to the P-GW, to notify the P-GW to perform multiple access binding;
  • the multiple access indication transmitting unit is configured to transmit the received multiple access indication to the P-GW;
  • the multiple access binding unit is configured to perform multiple access binding with two or more access networks according to the multiple access indication.
  • multiple access indication sending unit and the multiple access indication transmitting unit are used to:
  • the multiple access indication sending unit and the multiple access indication transmitting unit are connected by the 3GPP access network, PDN connection establishment operation or activation PDP context operation, and sending a multi-access indication to the P-GW;
  • the multiple access indication sending unit and The multiple access indication transmitting unit sends a multiple access indication to the P-GW by using a request bearer resource modification operation, a tracking area update TAU operation, or a dedicated multiple access indication reporting operation of the 3GPP access network;
  • the multiple access indication sending unit and the multiple access indication transmitting unit are initiated by using the 3GPP access network.
  • the attach operation, the PDN connection setup operation, or the activation of the PDP context operation a multi-access indication is sent to the P-GW.
  • the multiple access indication specifically includes:
  • Attachment request PDN connection establishment request, activated packet data protocol (PDP) context request, newly defined value for cell request type (request type) or attach request type (attach type); create session request, proxy binding update (PBU) In the message, a newly defined value for the handover indication;
  • PDP packet data protocol
  • an attach request a PDN connection establishment request, an activation PDP context request, a secondary PDP context activation request message, a create session request, a modify bearer request, a bearer resource command, a request bearer resource modification, a new cell in a PBU message, or a new Increase the indicator position;
  • an attach request a PDN connection establishment request, an activation PDP context request, a secondary PDP context activation request, a create session request, a modify bearer request, a bearer resource command, a request bearer resource modification, a newly defined cell in a PCO in a PBU message, Or indicator bit.
  • the multiple access binding unit is configured to receive, according to the multiple access indication, When the second access network accesses the binding request, multiple access binding is performed.
  • the multiple access binding unit is configured to perform multiple access binding according to the following manner: when receiving a create session request sent by the second access network, or a PBU message, the multiple access binding unit The GTP or PMIP tunnel binding relationship with the second access network is established while maintaining a tunnel binding relationship with the first access network, that is, a GTP tunnel or a PMIP tunnel.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any particular combination of hardware and software.
  • the solution of the embodiment of the present invention enables the P-GW to learn that the access scenario of the terminal is a multiple access scenario according to the received multiple access indication, so that the binding request of the second access network is received.
  • multiple access binding is implemented, multiple accesses of the terminal are implemented, and the impact and modification on the non-3GPP network are avoided.

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Abstract

一种多接入方法,所述方法包括:用户设备(UE)通过第三代合作伙伴计划(3GPP)接入网向分组数据网络网关(P-GW)发送多接入指示,通知所述P-GW执行多接入绑定;所述P-GW根据所述多接入指示,执行与两个或两个以上接入网的多接入绑定。

Description

一种多接入方法及***
技术领域
本发明涉及移动通信技术领域, 尤其涉及一种多接入方法及***。 背景技术
第三代合作伙伴计划 ( 3rd Generation Partnership Project, 简称为 3GPP ) 演进的分组***( Evolved Packet System, 简称为 EPS )主要由接入网和演进 的分组核心网( EPC )组成。如图 1所示, EPS接入网可以是 E-UTRAN( Evolved Universal Terrestrial Radio Access Network, 演进的通用陆地无线接入网)或 等; EPC包括: MME (移动管理单元, Mobility Management Entity ) 、 SGSN ( Serving GPRS ( General Packet Radio Service, 通用分组无线服务) Support Node,服务 GPRS 支持节点), S-GW (服务网关, Serving Gateway ) 、 P-GW ( Packet Data Network Gateway, 分组数据网络网关) 、 HSS (归属用户服务 器, Home Subscriber Server ) 、 3GPP AAA服务器( 3GPP认证授权计费服务 器) 、 PCRF ( Policy and Charging Rules Function, 策略和计费规则功能)及 其它支撑节点。
其中, E-UTRAN内部有 eNB ( evolved NodeB, 演进的基站) , UTRAN 内部有 NB ( NodeB , 基站) ; MME负责 UE ( User Equipment, 用户设备 ) 从 EUTRAN接入的移动性管理、 NAS ( Non Access Stratum, 非接入层 )信令 的处理和用户上下文的管理等控制面相关工作; SGSN 负责终端 UE 从 E-UTRAN接入的移动性管理、非接入层信令的处理和用户上下文的管理等工 作; S-GW是与 E-UTRAN相连的接入网关设备, 在 E-UTRAN和 P-GW之间 转发数据, 并且负责对寻呼等待数据进行緩存。 P-GW则是 3GPP演进分组系 统与 PDN ( Packet Data Network, 分组数据网络) 的边界网关, 负责用户终 端到 PDN的接入、 在 EPS与 PDN间转发数据等。 S-GW与 P-GW之间通过 S5/S8接口相连, 釆用 GTP ( General Packet Radio Service Tunneling Protocol, 通用分组无线服务隧道协议 )协议或者 PMIPv6 ( Proxy Mobile IP version 6, 代理移动 IP版本 6 )协议。 PCRF是策略和计费规则功能实体, 通过 Rx接口 与运营商提供的 IP业务网络相连,获取业务信息,并通过 Gx/Gxa/Gxb/Gxc接 口与网络中的网关设备相连, 负责发起 IP ( Internet Protocol , 互联网协议 ) 承载的建立, 保证业务数据的 QoS ( Quality of Service, 服务质量) , 并进行 计费控制。
此外 , EPS也支持 UE通过除 E-UTRAN以外的其它非 3GPP***的接入 , 其中, 非 3GPP***的接入通过 S2a/S2b/S2c接口实现( S2c接入与本发明无 关, 故图中未示出) , 此时, P-GW作为 3GPP***的接入与非 3GPP***的 接入的数据锚点。在 EPS的***架构中, 非 3GPP***被分为可信任非 3GPP IP接入网 (Trusted non-3GPP IP Access ) 和不可信任非 3GPP IP接入网 ( Untrusted non-3GPP IP Access ) 。 可信任非 3GPP IP接入网可直接通过 S2a 接口与 P-GW连接; 不可信任非 3GPP IP接入网需要经过 ePDG ( Evolved Packet Data Gateway, 演进的分组数据网关)与 P-GW相连, ePDG与 P-GW 间的接口为 S2b。 S2a/S2b接口均可釆用 GTP或者 PMIPv6协议。
目前, 对 EPS的研究课题集中在 Multiple Access (多接入)和 IP flow mobility (流迁移) , 其中多接入是指: 使 EPC支持 UE通过多种接入网经同 一个 P-GW 同时接入一个 PDN , 比如终端可以同时通过 3GPP接入网 ( EUTRAN接入网或者 UTRAN接入网 )和可信任非 3GPP接入网 (比如 WLAN接入网 ) 同时接入到同一 P-GW, P-GW同时建立与 S-GW的隧道和 与非 3GPP接入网关的隧道,或者终端可以同时通过 3GPP接入网( EUTRAN 接入网或者 UTRAN接入网 )和不可信任非 3GPP接入网 (比如 WLAN接入 网 )同时接入到同一 P-GW, P-GW同时建立与 S-GW的隧道和与 ePDG的隧 道。 在这种场景下, UE通过多个接入网附着到 EPC, P-GW为 UE分配一个 IP地址, UE和 PDN之间存在一个 IP连接(如图 1中的虚线所示)。 由于不 同的业务适用于釆用不同的网络传输, 多接入技术可以根据业务的特性选择 适用的接入网传输业务, 并且, 多个接入网可以分担网络负荷, 避免网络拥 堵。
相关技术中, 针对当前协议中定义的 P-GW支持终端 UE的初始接入和 切换接入两种操作, 如何通知 P-GW当前接入是区分于初始接入和切换接入 的 "多接入场景" , 是一个协议中未解决的问题。 如果该问题不解决, 则会 导致 P-GW无法获知当前为多接入场景而做出错误操作, 比如: 释放已建立 连接的接入网的连接或者拒绝当前接入网的接入。
在专利检索和相关的研究报告中也提出过针对该问题的解决方法,比如, 当终端 UE从第二接入网接入时, 从第二接入网接入操作中携带多接入指示 给 P-GW, 通知 P-GW是多接入场景。 但是, 这种方法存在以下缺陷: 当第 二接入网是非 3GPP接入网时,需要增强非 3GPP网络以使其支持多接入指示 的传递, 而且非 3GPP接入网络多种多样, 很难制定统一的标准。 发明内容
本发明解决的技术问题是提供一种多接入方法及***,避免了对非 3GPP 网络的影响和修改。
为解决上述技术问题, 本发明提供了一种多接入方法, 所述方法包括: 用户设备 ( UE )通过第三代合作伙伴计划( 3GPP )接入网向分组数据网 络网关 (P-GW )发送多接入指示, 通知所述 P-GW执行多接入绑定;
所述 P-GW根据所述多接入指示, 执行与两个或两个以上接入网的多接 入绑定。
优选地, 所述 UE通过 3GPP接入网向 P-GW发送多接入指示, 包括:
3GPP接入网作为第一接入网, 非 3GPP接入网作为第二接入网时, 所述 UE通过所述 3GPP接入网的附着操作、 PDN连接建立操作或者激活 PDP上 下文操作, 向所述 P-GW发送多接入指示;
或者, 3GPP接入网作为第一接入网,非 3GPP接入网作为第二接入网时, 在所述 UE向所述非 3GPP接入网发起接入之前, 所述 UE通过所述 3GPP接 入网的请求承载资源修改操作、跟踪区域更新 TAU操作或者专门的多接入指 示上报操作, 向所述 P-GW发送多接入指示。
优选地, 所述 UE通过 3GPP接入网向 P-GW发送多接入指示, 包括: 非 3GPP接入网作为第一接入网, 3GPP接入网作为第二接入网时, 所述 UE在通过所述 3GPP接入网发起的附着操作、 PDN连接建立操作、或者激活 PDP上下文操作时, 向所述 P-GW发送多接入指示。
优选地, 所述 P-GW根据所述多接入指示, 在接收到所述第二接入网的 接入绑定请求时, 执行多接入绑定。
优选地, 所述多接入指示, 包括:
附着请求、 PDN连接建立请求、 激活分组数据协议(PDP )上下文请求 中对信元请求类型 ( request type )或者附着请求类型 (attach type )新定义的 值; 创建会话请求、 代理绑定更新 (PBU ) 消息中, 对切换指示 (handover indication )新定义的值;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求消息、 创建会话请求、 修改承载请求、 承载资源命令、 请求 承载资源修改、 PBU消息中的新增信元或新增指示位;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求、 创建会话请求、 修改承载请求、 承载资源命令、 请求承载 资源修改、 PBU消息中的 PCO中新定义信元、 或者指示位。
优选地, 所述 P-GW接收到第二接入网的接入绑定请求时, 执行多接入 绑定, 包括:
所述 P-GW接收到第二接入网发送的创建会话请求, 或者 PBU消息; 所述 P-GW执行在保持与第一接入网的隧道绑定关系, 即 GTP隧道或者 PMIP隧道的同时, 建立与第二接入网的 GTP或者 PMIP隧道绑定关系。
本发明还提供了一种多接入***, 所述***包括: UE中的多接入指示发 送单元, 3GPP接入网网元中的多接入指示传送单元,和 P-GW中的多接入绑 定单元,
所述多接入指示发送单元设置为: 通过 3GPP接入网网元向 P-GW发送 多接入指示, 通知所述 P-GW执行多接入绑定;
所述多接入指示传送单元设置为: 将接收到的多接入指示传送给所述
P-GW;
所述多接入绑定单元设置为: 根据所述多接入指示, 执行与两个或两个 以上接入网的多接入绑定。 优选地, 所述多接入指示发送单元和所述多接入指示传送单元设置为:
3GPP接入网作为第一接入网, 非 3GPP接入网作为第二接入网时, 多接 入指示发送单元和所述多接入指示传送单元通过所述 3GPP接入网的附着操 作、 PDN连接建立操作或者激活 PDP上下文操作, 向所述 P-GW发送多接入 指示;
或者, 3GPP接入网作为第一接入网,非 3GPP接入网作为第二接入网时, 在所述 UE向所述非 3GPP接入网发起接入之前,多接入指示发送单元和所述 多接入指示传送单元通过所述 3GPP接入网的请求承载资源修改操作、 跟踪 区域更新 TAU操作或者专门的多接入指示上报操作,向所述 P-GW发送多接 入指示;
以及,非 3GPP接入网作为第一接入网, 3GPP接入网作为第二接入网时, 多接入指示发送单元和所述多接入指示传送单元在通过所述 3GPP接入网发 起的附着操作、 PDN连接建立操作、 或者激活 PDP上下文操作时, 向所述 P-GW发送多接入指示。
优选地, 所述多接入指示, 包括:
附着请求、 PDN连接建立请求、 激活分组数据协议(PDP )上下文请求 中对信元请求类型 ( request type )或者附着请求类型 (attach type )新定义的 值; 创建会话请求、 代理绑定更新 (PBU ) 消息中, 对切换指示 (handover indication )新定义的值;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求消息、 创建会话请求、 修改承载请求、 承载资源命令、 请求 承载资源修改、 PBU消息中的新增信元或新增指示位;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求、 创建会话请求、 修改承载请求、 承载资源命令、 请求承载 资源修改、 PBU消息中的 PCO中新定义信元、 或者指示位。
优选地, 所述多接入绑定单元设置为: 根据所述多接入指示, 在接收到 所述第二接入网的接入绑定请求时, 执行多接入绑定。
优选地, 所述多接入绑定单元设置为: 按照以下方式执行多接入绑定: 接收到第二接入网发送的创建会话请求, 或者 PBU消息时, 所述多接入 绑定单元执行在保持与第一接入网的隧道绑定关系, 即 GTP隧道或者 PMIP 隧道的同时, 建立与第二接入网的 GTP或者 PMIP隧道绑定关系。
釆用本发明实施例方案, 使得 P-GW能够根据接收到的多接入指示, 获 知终端的接入场景是多接入场景, 从而在接收到第二接入网的绑定请求时, 执行多接入绑定, 实现终端的多接入, 避免了对非 3GPP网络的影响和修改。 附图概述
此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中:
图 1是相关技术中 EPS的***架构示意图;
图 2是本发明实施例一、 二的流程示意图;
图 3是本发明实施例三的流程示意图;
图 4是本发明实施例四的流程示意图;
图 5是本发明实施例五的流程示意图;
图 6是本发明实施例的多接入***的示意框图。 本发明的较佳实施方式
针对相关技术存在的问题, 本实施方式提供一种实现多接入的方法, 在
UE通过 3GPP接入网和非 3GPP接入网发建立多接入时, 通过 3GPP***的 信令发送多接入指示发送给 P-GW, P-GW根据接收到的多接入指示, 获知终 端的接入场景是多接入场景, 在第二接入网请求绑定时, P-GW执行多绑定, 实现终端的多接入。 P-GW执行多绑定, 是指 P-GW执行在保持与第一接入 网的隧道绑定关系, 即 GTP隧道或者 PMIP隧道的同时, 建立与第二接入网 的 GTP或者 PMIP隧道绑定关系。
需要说明的是, 本发明实施例中所提到的第一接入网、 第二接入网是针 对一个 PDN连接或者 PDP上下文来讲的, 某一个 PDN连接/ PDP上下文中, 3GPP侧和非 3GPP侧接入的顺序决定了是该 PDN连接的第一接入网或者第 二接入网。 举例来说, 终端首先附着到 3GPP, 建立的 PDN连接 1 , 又附着 到非 3GPP, 建立 PDN连接 1的多接入, 然后又在非 3GPP发起建立 PDN连 接 2 ,之后又在 3GPP建立 PDN连接 2的多接入。对于 PDN连接 1来说, 3GPP 和非 3GPP分别是第一接入网和第二接入网, 而对于 PDN连接 2来说, 3GPP 和非 3GPP分别是第二接入网和第一接入网。
具体地, 本实施方式提供的多接入方法, 应用于 EPS, 釆用如下技术方 案:
UE通过 3GPP接入网向 P-GW发送多接入指示,通知 P-GW执行多接入 绑定;
P-GW根据所述多接入指示, 执行与两个或两个以上接入网的多接入绑 定。
其中, UE通过 3GPP接入网向 P-GW发送多接入指示, 包括以下几种方 式:
一, 3GPP接入网作为第一接入网, 非 3GPP接入网作为第二接入网时,
UE通过 3GPP接入网的附着操作、 PDN连接建立操作或者激活 PDP上下文 操作, 向 P-GW发送多接入指示;
二, 3GPP接入网作为第一接入网, 非 3GPP接入网作为第二接入网时, 在 UE向非 3GPP接入网发起接入之前, UE通过 3GPP接入网的请求承载资 源修改操作、 跟踪区域更新 TAU操作或者专门的多接入指示上报操作, 向 P-GW发送多接入指示;
三, 非 3GPP接入网作为第一接入网, 3GPP接入网作为第二接入网时, UE在通过 3GPP接入网发起的附着操作、 PDN连接建立操作、或者激活 PDP 上下文操作时, 向 P-GW发送多接入指示。
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 下 述实施方案适用于 3GPP网络的 E-UTRAN网络与 WLAN/固定宽带网络(固 网)作为两种接入网的多接入场景, 也适用于 3GPP的网络的 UTRAN网络 和 WLAN/固定宽带网络(固网)作为两种接入网的多接入场景; 且, 在不冲 突的情况下, 本申请中的实施例及各实施例中的特征可以相互任意组合。
实施例一
参见图 2所示流程, 本实施例基于的是 S5/8接口, 以及非 3GPP接入网 关与 P-GW之间的 S2a接口、 ePDG与 P-GW之间的 S2b接口均釆用 GTP协 议的场景, 该流程具体步骤描述如下:
步骤 201 : UE决定通过 3GPP接入网附着到 EPC, 于是发起附着建立操 作; 或者 UE 已经接入到了 EPC 网络后, 又欲建立一个附加 PDN连接 ( additional PDN connection ) , 于是发起 PDN连接建立操作。
步骤 202: UE发送附着请求 /PDN连接建立请求给 MME, 并在该消息中 携带 "多接入指示" 。
步骤 203: UE通过 MME向 HSS/AAA请求进行用户接入认证。
步骤 204: MME发送 "创建会话请求" 消息给 S-GW, S-GW发送 "创 建会话请求"消息给 P-GW,消息中均携带用于指示多接入的 "多接入指示"。
步骤 205: P-GW与 PCRF执行 IP-CAN会话建立操作。
步骤 206: 作为对步骤 204的响应消息, P-GW发送 "创建会话响应" 消 息给 S-GW, S-GW发送 "创建会话响应" 消息给 MME。
步骤 207: 附着/ PDN连接建立的后续步骤。
步骤 208: 此后, UE决定从非 3GPP网络发起接入, 于是发起附着 /PDN 连接建立操作。
该步骤属于非 3GPP内部的操作, 与不同的非 3GPP***有关。
步骤 209: 非 3GPP接入网关 /ePDG (不可信任非 3GPP接入网接入 )发 送 "创建会话请求" 消息给 P-GW;
步骤 210: P-GW收到步骤 209的请求消息后, 由于在步骤 204步收到了 多接入指示, P-GW在此接受步骤 209的请求, 并且保留步骤 204和步骤 205 建立的隧道关系, 这样就实现了 P-GW同多个接入网关的隧道绑定关系, 终 端 UE实现了多接入。 此步骤之后, P-GW同 3GPP接入网和非 3GPP接入网的隧道都是激活状 态的, P-GW可以同时向两个接入网发送数据包。
步骤 211 : P-GW向非 3GPP接入网关 /ePDG发送创建会话响应消息。 步骤 212: UE在非 3GPP接入网完成附着/ PDN连接建立操作。
通过以上步骤, 终端 UE实现了多接入。
其中, 上述步骤 206-207中, 可选的, 如果 P-GW支持多绑定 /多接入, 并接受了终端 UE发送来的 "多接入" 请求, P-GW可以发送指示信息给端 UE。 该步骤中, P-GW发送的 "创建会话响应" , S-GW发送 "创建会话响 应"消息均携带该指示。 该指示信息指示的是 P-GW是否接受了多接入请求, 并反映了 P-GW对多接入的支持能力。 同样, 可选的, 步骤 207 , MME将该 指示发送给 UE。 UE收到从 P-GW反馈的指示信息, 可以据此判断 P-GW是 否接受了接入请求: 如果反馈了指示, 表明 P-GW接受了多接入; 如果没有 返回指示, 表明 P-GW没有接受多接入操作。
此外, 步骤 202、 204 中的多接入指示信息, 如果能够被 MME、 S-GW 感知, 则 MME和 S-GW如果支持多接入, 则进一步向下一步传递该指示信 息,如果 MME和 S-GW不支持多接入, MME和 S-GW将不会继续向下一步 信息传递该指示信息。 这样, 对于 MME, S-GW, P-GW等网元来说, 下一 级网元是否收到了该指示信息也就体现了上一级网元是否支持多接入功能, 这样, 多接入指示信息通过步骤 202,204传到 P-GW, P-GW对多接入能力是 否支持的指示信息再通过步骤 206,207传递到 UE,只要 UE收到了指示信息, 就证明 MME, SGW和 P-GW支持多接入操作, 否则只要中间任何一个网元 不支持多接入操作, UE就收不到指示信息, UE就可以判断***不支持多接 入操作。
实施例二
本实施例同前述实施例一基本相同, 二者的主要不同之处在于, S5/8, S2a, S2b接口可以釆用 PMIPv6协议。 图 2流程中的步骤 204和 206、 步骤 209和 211的消息可能为 PMIPv6协议的消息, 或者为 PBU ( Proxy Binding Update, 代理绑定更新)和 PBA ( Proxy Binding Acknowledgement, 代理绑定 确认 )一对消息。 即: 步骤 204和 206、 步骤 209和 211或者都是 PMIP消息, 或者都是 GTP消息 (即实施例一); 或者步骤 204和 206是 GTP消息, 步骤 209和 211是 PMIP消息,或者步骤 204和 206是 PMIP消息,步骤 209和 211 是 GTP消息。
之后的实施例也类同, 即只要涉及 S5/8接口, 或者 S2a接口, 或者 S2b 接口的时候, 均可以釆用 GTP协议和 PMIPv6协议。
实施例三
本实施例与前述实施例一和实施例二的不同点在于: 实施例一和实施例 二是在终端 UE附着到 3GPP网络或者从 3GPP网络建立 PDN连接的时候, 发送多接入指示给 P-GW, 而在本实施例中, 多接入只是在终端将要发起从 非 3GPP接入之前, 先从 3GPP接入网发送该多接入指示给 P-GW, P-GW收 到该指示, 判定当前是多接入场景, 此后, 只要 P-GW收到了来自非 3GPP 接入网网关或者 ePDG的绑定请求后, P-GW就会执行多绑定。
如图 3所示, 该流程具体步骤描述如下:
步骤 301 : UE已经通过 3GPP接入网附着到 EPC, 而且可能已经建立一 个或者多个 PDN连接。
与前述实施例不同的是, 本实施例中, UE通过 3GPP接入网建立到 EPC 的连接时, 不携带多接入指示。
步骤 302: UE决定从非 3GPP接入网接入, 建立多接入;
步骤 303-307: UE在向非 3GPP接入网发起附着/ PDN连接之前, 先经 3GPP接入网发送携带 "多接入指示" 的第一请求消息给 MME。
步骤 304, MME发送携带"多接入指示"的第二请求消息给 S-GW, S-GW 收到后发送给 P-GW。
步骤 305 , P-GW保留该第二请求消息中的多接入指示。
步骤 306, P-GW回应第二响应消息给 S-GW, S-GW收到该第二响应消 息后回应给 MME 步骤 307, MME回应第一响应消息给 UE。
上述 303-307步骤具体可釆用以下多种方式实现:
方式一: UE通过现有的请求承载资源修改操作将 "多接入指示"发送给 P-GW。
例如, UE和 MME之间的第一请求消息、 MME和 S-GW之间、 S-GW 和 P-GW之间的第二请求消息, 可以分别是: NAS消息族的 "请求承载资源 修改" 消息, 和 GTP的消息族的 "承载资源命令" 消息。
而 P-GW在收到多接入指示消息后, 通过步骤 306-307, 向 S-GW发送 GTP的消息族的 "承载资源拒绝" 消息, 或者发起网络发起的承载资源修改 / 更新 /激活操作, 对步骤 303-304进行响应。
方式二: UE通过现有的跟踪区域更新操作 ( Tracking Area Update, TAU ) 将 "多接指示入" 发送给 P-GW。
例如, UE和 MME之间的第一请求消息、 MME和 S-GW之间、 S-GW 和 P-GW之间的第二请求消息, 可以分别是: NAS消息族的 "TAU" 消息, 和 GTP的消息族的 "修改承载请求" 消息。
而 P-GW在收到多接入指示消息后, 通过步骤 306-307, 向 S-GW发送 GTP的消息族的 "修改承载响应" 消息, 对步骤 303-304进行响应。
方式三: 通过专门的多接入指示上报操作上报。 在 UE与 MME新设置 NAS ( Non-Access Stratum, 非接入层) 消息, 在 MME与 S-GW, S-GW与 P-GW之间通过新增的 GTP消息, 传递多接入指示。 在回应消息中也是对应 的新增的响应消息。 步骤 308: 此后, UE从非 3GPP网络发起接入, 或者是附着操作或者是 PDN连接建立操作。
步骤 309: 非 3GPP接入网关 /ePDG发送 "创建会话请求" 或者 PBU消 息 (这两种消息合称为绑定请求)给 P-GW。
步骤 310: P-GW收到步骤 309的请求消息后, 由于在步骤 304收到了多 接入指示, P-GW在此接受步骤 309的请求, 并且与 S-GW的隧道关系, 这 样就实现了 P-GW同多个接入网关的隧道绑定关系, 终端 UE实现了多接入。 此步骤之后, P-GW同 3GPP接入网和非 3GPP接入网的隧道都是激活状 态的, P-GW可以同时向两个接入网发送数据包。
步骤 311 : P-GW向非 3GPP接入网关 /ePDG发送创建会话响应消息。 步骤 312: UE在非 3GPP接入网完成附着/ PDN连接建立操作。
通过以上步骤, 终端 UE实现了多接入。
需要说明的是, 如果 S2a/2b接口釆用 PMIPv6协议, 则步骤 309与步骤 311的消息分别为 PBU和 PBA。
此外, 上述对于步骤中的 304-306的描述是基于 S5/S8釆用 GTP协议的 假设, 如果 S5/S8釆用 PMIPv6协议, 则相关的操作可能是以下方式:
( 1 ) S-GW收到 MME发送的 "承载资源命令" 后, 通过 "网关控制会 话" 操作发送多接入指示给 PCRF, PCRF通过 "IP-CAN会话" 操作将多接 入指示发送给 P-GW。 S-GW和 P-GW之间没有直接交互信息;
( 2 ) S-GW收到 MME发送的 "承载资源命令" 后, 通过 "PBU" 消息 发送多接入指示给 P-GW, PGW保存多接入指示并给 S-GW回应 PBA消息。
实施例四
本实施例描述的是终端通过 UTRAN和 WLAN建立多接入的场景。 UE 首先从 UTRAN接入, 并在附着过程或者 PDP ( Packet Data Protocol, 分组数 据协议)上下文激活过程中, 将多接入指示通过附着请求消息或者激活 PDP 上下文请求消息携带给 SGSN。 SGSN再通过 "创建会话请求" 消息携带给 S-GW, 再由 S-GW发送个 P-GW。
如图 4所示, 该流程具体步骤描述如下:
步骤 401 : UE决定从 3GPP接入网发起附着或者 PDN连接建立操作。 步骤 402: UE发送附着请求 /激活 PDN上下文请求给 SGSN, 并在消息 中携带 "多接入指示" 。
步骤 403: UE通过 SGSN向 HSS/AAA请求进行用户接入认证。
步骤 404: SGSN发送 "创建会话请求" 消息给 S-GW, S-GW发送 "创 建会话请求"消息给 P-GW,消息中均携带用于指示多接入的 "多接入指示"。 步骤 405: P-GW与 PCRF执行 IP-CAN会话建立操作。
步骤 406: 作为对步骤 404的响应消息, P-GW发送 "创建会话响应" 消 息给 S-GW, S-GW发送 "创建会话响应" 消息给 SGSN。
步骤 407: 附着 /激活 PDN上下文的后续步骤。
步骤 408: 此后, UE决定从非 3GPP网络发起接入, 于是发起附着 /PDN 连接建立操作。
步骤 409: 非 3GPP接入网关 /ePDG (不可信任非 3GPP接入网接入 )发 送 "创建会话请求" 消息给 P-GW;
步骤 410: P-GW收到步骤 409的请求消息后, 由于在步骤 404步收到了 多接入指示, P-GW在此接受步骤 409的请求, 并且保留步骤 404和步骤 405 建立的隧道关系, 这样就实现了 P-GW同多个接入网关的隧道绑定关系, 终 端 UE实现了多接入。
此步骤之后, P-GW同 3GPP接入网和非 3GPP接入网的隧道都是激活状 态的, P-GW可以同时向两个接入网发送数据包。
步骤 411 : P-GW向非 3GPP接入网关 /ePDG发送创建会话响应消息。 步骤 412: UE在非 3GPP接入网完成附着/ PDN连接建立操作。
通过以上步骤, 终端 UE实现了多接入。
根据以上描述可以看出, 本实施例实际上也包含了对应前述实施例一二 三的多种场景, 例如, 本实施例中, S-GW和 P-GW之间如果釆用 PMIPv6 协议, 则步骤 404-406描述同实施例二的描述。
现将本实施例与实施例一二三的主要不同之处列举如下:
本实施例与前述实施例一、 二的主要不同之处在于, 本实施例中是 UE 首先从 UTRAN接入, 并在附着/ PDP上下文激活过程中将多接入指示通过附 着请求消息 /激活 PDP上下文请求消息中携带给 SGSN; 而前述实施例一、 二 则是 UE是通过 E-UTRAN接入, 并在附着/ PDP连接建立过程中将多接入指 示通过附着请求消息/ PDP连接建立请求消息中携带给 MME; 本实施例与前述实施例二的主要不同之处在于, 将 MME改成 SGSN即 可, 其余的流程完全相同。 步骤描述上, UE发给 SGSN的可以是增强的二次 PDP上下文激活请求消息, 或者是 UE和 SGSN之间新增的消息。 SGSN之 后的消息同实施例三的描述。
实施例五
该实施例基于的场景是终端先从非 3GPP接入,再从 3GPP建立多接入的 场景。多接入的指示信息是通过第二接入网,也就是 3GPP接入网的附着 /PDN 连接建立/ PDP上下文激活操作由 UE携带给 P-GW的。
如图 5所示, 该流程具体步骤描述如下:
步骤 501 : 终端已经从非 3GPP接入, 并且建立了一个或者多个 PDN连 接;
步骤 501a. UE从 3GPP接入网 ( EUTRAN或者 UTRAN )发起附着、 或 者 PDN连接建立、 或者 PDP上下文激活。
步骤 502: UE发送附着请求、 或者 PDN连接建立请求、 或者 PDP上下 文激活请求给 MME/SGSG , 请求消息中携带多接入指示信息;
步骤 503 (可选): 如果是初始接入 3GPP***, 则先执行用户接入认证 操作。
步骤 504: MME/SGSN发送 "创建会话请求"给 S-GW, S-GW发送 "创 建会话请求" 或者 "PBU" 消息给 P-GW, 消息中均携带多接入指示信息。
步骤 505: P-GW与 PCRF执行 IP-CAN会话修改操作;
步骤 505a: P-GW收到来自 S-GW的绑定请求消息, 根据多接入指示信 息执行多绑定操作。
步骤 506: P-GW给 S-GW回应创建会话响应或者 PBA消息, S-GW给 MME回应创建会话响应消息。
步骤 507: 附着/ PDN连接建立/ PDP上下文激活操作后续步骤完成。 通过以上步骤, 终端 UE实现了多接入。 其中, 上述步骤 504-506 的具体实现可参照前述实施例中的详细描述, 在此不再赘述。
其中, 关于上述实施例流程中的多接入指示, 其携带方式可以有多种实 现方式。 例如, 该多接入指示可以是一个新增的信元, 或者是现有信元中的 一个新定义的标志位, 或者是现有信元的或者现有标志位一个新定义的值 ( value ) 。 下面列举几种典型的实现方式:
( A )针对实施例一、 实施例二、 实施例四和实施例五的方案, 该多接 入指示在消息 "附着请求/ PDN连接建立请求 /激活 PDP上下文请求" 消息中 可以是对现有信元请求类型 (request type )新定义的指示多接入的一个值, 在"创建会话请求"消息或者 PBU消息中,对"切换指示" ( handover indication ) 新定义的指示多接入的一个值。
( B )针对前述实施例一、 二、 三、 四和五, 可以在附着请求/ PDN连接 建立请求 /激活 PDP上下文请求 /二次 PDP上下文激活请求消息, 和 "创建会 话请求" 消息或者 PBU消息的现有信元 PCO ( Protocol Configuration Option, 协议配置选项) 中, 携带多接入指示, 因为现有的 PC0消息是不被 MME和 S-GW影响的, 这样可以减 d、对现有***的影响;
( C )针对前述实施例, 均可以新增一个信元或者指示位, 用于传递多接 入指示。
此外, 如图 6所示, 本发明实施例中还提供了一种多接入***, 该*** 主要包括 UE中的多接入指示发送单元, 3GPP接入网网元(如 MME、 S-GW, 和 /或 SGSN等) 中的多接入指示传送单元, 和 P-GW中的多接入绑定单元, 其中:
所述多接入指示发送单元用于, 通过 3GPP接入网网元向 P-GW发送多 接入指示, 通知所述 P-GW执行多接入绑定;
所述多接入指示传送单元用于, 将接收到的多接入指示传送给所述 P-GW; 所述多接入绑定单元用于, 根据所述多接入指示, 执行与两个或两个以 上接入网的多接入绑定。
进一步地, 所述多接入指示发送单元和所述多接入指示传送单元用于:
3GPP接入网作为第一接入网, 非 3GPP接入网作为第二接入网时, 多接 入指示发送单元和所述多接入指示传送单元通过所述 3GPP接入网的附着操 作、 PDN连接建立操作或者激活 PDP上下文操作, 向所述 P-GW发送多接入 指示;
或者, 3GPP接入网作为第一接入网,非 3GPP接入网作为第二接入网时, 在所述 UE向所述非 3GPP接入网发起接入之前,多接入指示发送单元和所述 多接入指示传送单元通过所述 3GPP接入网的请求承载资源修改操作、 跟踪 区域更新 TAU操作或者专门的多接入指示上报操作,向所述 P-GW发送多接 入指示;
以及,非 3GPP接入网作为第一接入网, 3GPP接入网作为第二接入网时, 多接入指示发送单元和所述多接入指示传送单元在通过所述 3GPP接入网发 起的附着操作、 PDN连接建立操作、 或者激活 PDP上下文操作时, 向所述 P-GW发送多接入指示。
进一步地, 所述多接入指示, 具体包括:
附着请求、 PDN连接建立请求、 激活分组数据协议(PDP )上下文请求 中对信元请求类型 ( request type )或者附着请求类型 (attach type )新定义的 值; 创建会话请求、 代理绑定更新 (PBU ) 消息中, 对切换指示 (handover indication )新定义的值;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求消息、 创建会话请求、 修改承载请求、 承载资源命令、 请求 承载资源修改、 PBU消息中的新增信元或新增指示位;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求、 创建会话请求、 修改承载请求、 承载资源命令、 请求承载 资源修改、 PBU消息中的 PCO中新定义信元、 或者指示位。
进一步地, 所述多接入绑定单元用于, 根据所述多接入指示, 在接收到 所述第二接入网的接入绑定请求时 , 执行多接入绑定。
进一步地, 所述多接入绑定单元用于, 按照以下方式执行多接入绑定: 接收到第二接入网发送的创建会话请求, 或者 PBU消息时, 所述多接入 绑定单元执行在保持与第一接入网的隧道绑定关系, 即 GTP隧道或者 PMIP 隧道的同时, 建立与第二接入网的 GTP或者 PMIP隧道绑定关系。
以上仅为本发明的优选实施案例而已, 并不用于限制本发明, 本发明还 可有其他多种实施例, 在不背离本发明精神及其实质的情况下, 熟悉本领域 的技术人员可根据本发明做出各种相应的改变和变形, 但这些相应的改变和 变形都应属于本发明所附的权利要求的保护范围。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。 工业实用性 釆用本发明实施例方案, 使得 P-GW能够根据接收到的多接入指示, 获 知终端的接入场景是多接入场景, 从而在接收到第二接入网的绑定请求时, 执行多接入绑定, 实现终端的多接入, 避免了对非 3GPP网络的影响和修改。

Claims

权 利 要 求 书
1、 一种多接入方法, 所述方法包括:
用户设备 ( UE )通过第三代合作伙伴计划( 3GPP )接入网向分组数据网 络网关 (P-GW )发送多接入指示, 通知所述 P-GW执行多接入绑定;
所述 P-GW根据所述多接入指示, 执行与两个或两个以上接入网的多接 入绑定。
2、 如权利要求 1所述的方法, 其中,
所述 UE通过 3GPP接入网向 P-GW发送多接入指示, 包括:
3GPP接入网作为第一接入网, 非 3GPP接入网作为第二接入网时, 所述 UE通过所述 3GPP接入网的附着操作、 分组数据网络(PDN )连接建立操作 或者激活分组数据协议(PDP )上下文操作, 向所述 P-GW发送多接入指示; 或者, 3GPP接入网作为第一接入网,非 3GPP接入网作为第二接入网时, 在所述 UE向所述非 3GPP接入网发起接入之前, 所述 UE通过所述 3GPP接 入网的请求承载资源修改操作、 跟踪区域更新 (TAU )操作或者专门的多接 入指示上报操作, 向所述 P-GW发送多接入指示。
3、 如权利要求 2所述的方法, 其中,
所述 UE通过 3GPP接入网向 P-GW发送多接入指示, 包括:
非 3GPP接入网作为第一接入网, 3GPP接入网作为第二接入网时, 所述 UE在通过所述 3GPP接入网发起的附着操作、 PDN连接建立操作、或者激活 PDP上下文操作时, 向所述 P-GW发送多接入指示。
4、 如权利要求 2或 3所述的方法, 其中,
所述 P-GW根据所述多接入指示, 在接收到所述第二接入网的接入绑定 请求时, 执行多接入绑定。
5、 如权利要求 1、 2或 3所述的方法, 其中,
所述多接入指示, 包括:
附着请求、 PDN连接建立请求、激活 PDP上下文请求中对信元请求类型 ( request type )或者附着请求类型( attach type )新定义的值; 创建会话请求、 代理绑定更新 (PBU ) 消息中, 对切换指示 (handover indication )新定义的 值;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求消息、 创建会话请求、 修改承载请求、 承载资源命令、 请求 承载资源修改、 PBU消息中的新增信元或新增指示位;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求、 创建会话请求、 修改承载请求、 承载资源命令、 请求承载 资源修改、 PBU消息中的协议配置选项(PCO )中新定义信元、 或者指示位。
6、 如权利要求 4所述的方法, 其中,
所述 P-GW接收到第二接入网的接入绑定请求时, 执行多接入绑定, 包 括:
所述 P-GW接收到第二接入网发送的创建会话请求, 或者 PBU消息; 所述 P-GW执行在保持与第一接入网的隧道绑定关系, 即通用分组无线 服务隧道协议(GTP )隧道或者代理移动 IP ( PMIP ) 隧道的同时, 建立与第 二接入网的 GTP或者 PMIP隧道绑定关系。
7、 一种多接入***, 所述***包括: 用户设备(UE ) 中的多接入指示 发送单元, 第三代合作伙伴计划 (3GPP )接入网网元中的多接入指示传送单 元, 和分组数据网络网关 (P-GW ) 中的多接入绑定单元,
所述多接入指示发送单元设置为: 通过 3GPP接入网网元向 P-GW发送 多接入指示, 通知所述 P-GW执行多接入绑定;
所述多接入指示传送单元设置为: 将接收到的多接入指示传送给所述 P-GW;
所述多接入绑定单元设置为: 根据所述多接入指示, 执行与两个或两个 以上接入网的多接入绑定。
8、 如权利要求 7所述的***, 其中,
所述多接入指示发送单元和所述多接入指示传送单元设置为:
3GPP接入网作为第一接入网, 非 3GPP接入网作为第二接入网时, 多接 入指示发送单元和所述多接入指示传送单元通过所述 3GPP接入网的附着操 作、 分组数据网络(PDN )连接建立操作或者激活分组数据协议(PDP )上 下文操作, 向所述 P-GW发送多接入指示;
或者, 3GPP接入网作为第一接入网,非 3GPP接入网作为第二接入网时, 在所述 UE向所述非 3GPP接入网发起接入之前,多接入指示发送单元和所述 多接入指示传送单元通过所述 3GPP接入网的请求承载资源修改操作、 跟踪 区域更新 (TAU )操作或者专门的多接入指示上报操作, 向所述 P-GW发送 多接入指示;
以及,非 3GPP接入网作为第一接入网, 3GPP接入网作为第二接入网时, 多接入指示发送单元和所述多接入指示传送单元在通过所述 3GPP接入网发 起的附着操作、 PDN连接建立操作、 或者激活 PDP上下文操作时, 向所述 P-GW发送多接入指示。
9、 如权利要求 7或 8所述的***, 其中,
所述多接入指示, 包括:
附着请求、 PDN连接建立请求、激活 PDP上下文请求中对信元请求类型
( request type )或者附着请求类型( attach type )新定义的值; 创建会话请求、 代理绑定更新 (PBU ) 消息中, 对切换指示 (handover indication )新定义的 值;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求消息、 创建会话请求、 修改承载请求、 承载资源命令、 请求 承载资源修改、 PBU消息中的新增信元或新增指示位;
或者, 附着请求、 PDN连接建立请求、 激活 PDP上下文请求、 二次 PDP 上下文激活请求、 创建会话请求、 修改承载请求、 承载资源命令、 请求承载 资源修改、 PBU消息中的协议配置选项(PCO )中新定义信元、 或者指示位。
10、 如权利要求 9所述的***, 其中,
所述多接入绑定单元设置为: 根据所述多接入指示, 在接收到所述第二 接入网的接入绑定请求时, 执行多接入绑定。
11、 如权利要求 10所述的***, 其中, 所述多接入绑定单元设置为: 按照以下方式执行多接入绑定:
接收到第二接入网发送的创建会话请求, 或者 PBU消息时, 所述多接入 绑定单元执行在保持与第一接入网的隧道绑定关系, 即通用分组无线服务隧 道协议(GTP )隧道或者代理移动 IP ( PMIP ) 隧道的同时, 建立与第二接入 网的 GTP或者 PMIP隧道绑定关系。
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