WO2013060164A1 - 一种信息指示及网关选择方法、系统和设备 - Google Patents

一种信息指示及网关选择方法、系统和设备 Download PDF

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Publication number
WO2013060164A1
WO2013060164A1 PCT/CN2012/078222 CN2012078222W WO2013060164A1 WO 2013060164 A1 WO2013060164 A1 WO 2013060164A1 CN 2012078222 W CN2012078222 W CN 2012078222W WO 2013060164 A1 WO2013060164 A1 WO 2013060164A1
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Prior art keywords
pgw
sgw
mobile relay
relay
mme
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English (en)
French (fr)
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焦斌
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/17—Selecting a data network PoA [Point of Attachment]

Definitions

  • the invention relates to an information indicating and gateway selection method, system and device.
  • the application is submitted to the Chinese Patent Office on October 26, 2011, and the application number is 201110329999.0.
  • the invention name is "an information indication and gateway selection method, system and device". Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference.
  • the present invention relates to the field of wireless communications, and in particular, to an information indication and gateway selection method, system, and device. Background technique
  • the selection of a serving gateway (SGW) for a terminal (UE) is mainly based on the current location of the UE and the topology relationship of the network, so that the route of the SGW serving the current UE to the current serving base station of the UE is always optimized.
  • the scheme for the network to select the SGW for the UE is as follows:
  • the network selects the SGW for the UE to refer to the current location of the UE.
  • the SGW1 of the Core Network site 1 is connected to the base station site 1/2/3 base station, and the Core Network site 2
  • the SGW2 is connected to the base station of the base station site 4/5/6.
  • the serving base station of the UE changes continuously.
  • the network selects the device SGW2 of the Core Network site 2 for the UE. Continue to provide services.
  • the downlink data routing path of the UE is: Packet Data Network (PDN GW) -> SGW -> Base station -> UE. As shown in Figure 1, as the UE moves, the downlink data routing path of the UE also changes.
  • PDN GW Packet Data Network
  • the system architecture diagram is shown in Figure 2.
  • the Mobile Relay is given two identities in the two networks, firstly composed of the Relay Network Element.
  • the Mobile Relay works as a normal UE in the network; and in the network composed of the UE Network Element (the network consisting of the devices labeled 2), Mobile Relay works as a base station (eNB) in the network.
  • eNB base station
  • the Mobile Relay works as a normal UE. Therefore, with the movement of the Mobile Relay, the mobile base station of the Mobile Relay is the donor base station (Donor eNB, De B) and The SGW is constantly changing.
  • the Mobile Relay works as an eNB, and the real user UE (User-UE) under the Mobile Relay does not actually know that the Mobile Relay is a special base station, and does not know. Mobile Relay is on the move.
  • the downlink data routing path of the User-UE after the introduction of the Mobile Relay is: User-UE PGW -> User-UE SGW -> Relay-Terminal Packet Data Gateway (Relay-UE PGW) ) -> Relay-UE SGW -> Donor e B-> Mobile Relay -> User-UE, where the downstream data transmission path changes with the Mobile Relay.
  • Relay-UE PGW Relay-UE PGW
  • the network selects the SGW for the UE, and usually considers the topology of the network, so that the route between the eNB itself and the SGW is always optimized.
  • the topology of the network will change with the movement of the Mobile Relay itself. Therefore, the prior art cannot guarantee that the network selects the SGW for the UE under the Mobile Relay (ie, User-UE).
  • User-UE SGW The route to the Mobile Relay is still optimized.
  • the embodiment of the invention provides an information indication and gateway selection method, system and device, which are used to solve the problem that the optimization of the downlink data routing path of the UE under the Mobile Relay cannot be guaranteed.
  • a gateway selection method comprising:
  • the relay terminal mobility management entity Relay-UE MME receives the attach request or the packet data network PDN connection request sent by the mobile relay device Mobile Relay;
  • the Relay-UE MME determines a physical device that supports both the packet data gateway PGW function and the serving gateway SGW function, and selects the physical device as the PGW of the Mobile Relay.
  • An information indicating method comprising:
  • the operation and maintenance system OAM receives the configuration information request message sent by the mobile relay device Mobile Relay; the OAM sends the configuration information of the Mobile Relay to the Mobile Relay, and the configuration information includes the group configured for the Mobile Relay Information and service gateway SGW capability indication information of the data gateway PGW, the PGW is an entity device that supports both the PGW function and the SGW function, and the SGW capability indication information is used to indicate that the PGW supports the SGW function.
  • An information indicating method comprising:
  • the mobile relay device receives the information of the packet data gateway PGW of the Mobile Relay and the service gateway SGW capability indication information sent by the relay terminal mobility management entity Relay-UE MME or the operation and maintenance system OAM, and the SGW capability indication information is used. Instructing the PGW to support the SGW function;
  • the Mobile Relay sends the information of the PGW and the SGW capability indication information to the user terminal mobility management entity User-UE MME.
  • a gateway selection method comprising:
  • the user terminal mobility management entity User-UE MME receives the information of the Mobile Relay packet data gateway PGW and the serving gateway SGW capability indication information sent by the mobile relay device Mobile Relay, and the SGW capability indication information is used to indicate that the PGW supports the SGW function. And storing an address information of the PGW and an association relationship between the SGW capability indication information and the Mobile Relay;
  • the User-UE MME determines that the PGW supports the SGW function according to the association relationship, and selects the PGW as the SGW of the terminal that accesses the Mobile Relay.
  • a relay terminal mobility management entity Relay-UE MME, the Relay-UE MME includes: a receiving unit, configured to receive an attach request or a packet data network PDN connection request sent by the mobile relay device Mobile Relay;
  • the selecting unit is configured to determine a physical device that supports both the packet data gateway PGW function and the serving gateway SGW function, and selects the physical device as the PGW of the Mobile Relay.
  • An operation and maintenance system OAM includes:
  • the information and service gateway SGW capability indication information of the packet data gateway PGW is an entity device that supports both the PGW function and the SGW function, and the SGW capability indication information is used to indicate that the PGW supports the SGW function.
  • a mobile relay device Mobile Relay, the Mobile Relay includes:
  • a receiving unit configured to receive information and a serving gateway SGW capability indication information of the packet data gateway PGW of the Mobile Relay sent by the relay terminal mobility management entity Relay-UE MME or the operation and maintenance system OAM, where the SGW capability indication information is used Instructing the PGW to support the SGW function;
  • a sending unit configured to send the information about the PGW and the SGW capability indication information to the user terminal mobility management entity User-UE MME.
  • a user terminal mobility management entity User-UE MME, the User-UE MME includes:
  • a receiving unit configured to receive the information of the packet data gateway PGW of the Mobile Relay and the service gateway SGW capability indication information sent by the mobile relay device Mobile Relay, where the SGW capability indication information is used to indicate that the PGW supports the SGW function; and the PGW is saved. Address information and an association relationship between the SGW capability indication information and the Mobile Relay;
  • a selecting unit configured to determine, according to the association relationship, that the PGW supports the SGW function, and select the PGW as the SGW of the terminal that accesses the Mobile Relay.
  • a wireless communication system comprising:
  • a relay terminal mobility management entity Relay-UE MME configured to receive an attach request or a packet data network PDN connection request sent by the mobile relay device Mobile Relay, and determine a physical device that supports the packet data gateway PGW function and the serving gateway SGW function at the same time, And selecting the physical device as the PGW of the Mobile Relay; sending the information of the PGW and the SGW capability indication information to the Mobile Relay; the SGW capability indication information is used to indicate that the PGW supports the SGW function;
  • Mobile Relay configured to send the received information of the PGW and the SGW capability indication information sent by the Relay-UE MME to the user terminal mobility management entity User-UE MME;
  • User-UE MME configured to receive information about the PGW sent by the Mobile Relay and an SGW capability indication letter And storing the address information of the PGW and the association relationship between the SGW capability indication information and the Mobile Relay; determining, according to the association relationship, that the PGW supports the SGW function, and selecting the PGW as the SGW of the terminal that accesses the Mobile Relay.
  • a wireless communication system comprising:
  • a relay terminal mobility management entity Relay-UE MME configured to receive an attach request or a packet data network PDN connection request sent by the mobile relay device Mobile Relay, and determine a physical device that supports the packet data gateway PGW function and the serving gateway SGW function at the same time, And selecting the physical device as the PGW of the Mobile Relay;
  • the operation and maintenance system OAM is configured to receive a configuration information request message sent by the Mobile Relay, and send the configuration information of the Mobile Relay to the Mobile Relay, where the configuration information includes information and a SGW of the PGW configured for the Mobile Relay Capability indicating information, the PGW is a physical device that supports both the PGW function and the SGW function, and the PGW is the same as the PGW selected by the Relay-UE MME for the Mobile Relay; the SGW capability indication information is used to indicate that the PGW supports the SGW function. ;
  • a Mobile Relay configured to send the received information of the PGW and the SGW capability indication information sent by the OAM to the user terminal mobility management entity User-UE MME;
  • a user-UE MME configured to receive information about the PGW and the SGW capability indication information sent by the Mobile Relay, and save the address information of the PGW and the association relationship between the SGW capability indication information and the Mobile Relay, and determine the association according to the association relationship.
  • the PGW supports the SGW function, and selects the PGW as the SGW of the terminal accessing the Mobile Relay.
  • the PGW (the Relay-UE PGW) selected by the Mobile Relay on the network side and the SGW (the User-UE SGW) selected by the UE accessing the Mobile Relay are located in the same physical device, then Downlink data routing path in the UE: User-UE PGW-> User-UE SGW-> Relay-UE PGW-> Relay-UE SGW-> Donor e B-> Mobile Relay -> User-UE, User-UE
  • the transmission distance of the SGW to the Relay-UE PGW is almost zero, so that the optimization of the downlink data routing path of the UE is guaranteed.
  • FIG. 2 is a schematic diagram of a mobile process of a User-UE with a Mobile Relay in the prior art
  • FIG. 3 is a schematic flowchart of a method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic flowchart of still another method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart of still another method according to an embodiment of the present disclosure.
  • FIG. 7A is a schematic flowchart of Embodiment 1 of the present invention.
  • 7C is a schematic flowchart of Embodiment 3 of the present invention
  • 7D is a schematic flowchart of Embodiment 4 of the present invention
  • FIG. 8A is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 8B is a schematic structural diagram of another system according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another apparatus according to an embodiment of the present invention.
  • the embodiment of the present invention provides an information indication and gateway selection method.
  • the relay terminal mobility management entity (Relay) - UE MME ) selects a physical device that supports both the Packet Data Gateway ( PGW ) function and the Serving Gateway ( SGW ) function as the PGW of the Mobile Relay during the establishment of a network attached or packet data network ( PDN ) connection initiated by the Mobile Relay Relay-UE PGW, and send the information of the PGW and the SGW capability indication information to the Mobile Relay;
  • the Mobile Relay sends the information of the PGW and the SGW capability indication information to the User-UE MME;
  • the UE MME determines that the PGW supports the SGW function according to the received information, and selects the PGW as the user terminal serving gateway User-UE SGW, that is, the SGW that is the terminal that accesses the Mobile Relay.
  • PGW Packet Data Gateway
  • SGW Serving Gateway
  • the information of the PGW of the Mobile Relay is pre-configured in the Relay-UE MME/HSS and the OAM.
  • the PGW is an entity device that supports both the PGW function and the SGW function, and is configured in the Relay-UE MME/HSS and OAM. The information is consistent.
  • the Relay-UE MME selects the PGW for the Mobile Relay according to the configuration information during the network attachment or PDN connection establishment initiated by the Mobile Relay.
  • the OAM After receiving the configuration information request message sent by the Mobile Relay, the OAM sends the configuration information of the PGW including the pre-configured Mobile Relay and the configuration information of the SGW capability indication information to the Mobile Relay; the Mobile Relay then instructs the PGW and the SGW capability.
  • the information is sent to the User-UE MME.
  • the User-UE MME determines that the PGW supports the SGW function according to the received information, and selects the PGW as the User-UE SGW, that is, the SGW that is the terminal that accesses the Mobile Relay.
  • the method for selecting a gateway on the MME side of the Relay-UE includes the following steps: Step 30: The Relay-UE MME receives an attach request or a PDN connection request sent by the Mobile Relay; Step 31: Relay-UE The MME determines a physical device that supports both the PGW function and the SGW function, and selects the physical device as the PGW of the Mobile Relay.
  • the Relay-UE MME determines an entity device that supports both the PGW function and the SGW function, and the specific implementation may be as follows:
  • the Relay-UE MME obtains the SGW query result list and the PGW node by querying the Domain Name Service System (DNS).
  • DNS Domain Name Service System
  • the device identifier is determined, and the device identifier that is in the SGW query result list and the PGW result list is determined, and the gateway device corresponding to the device identifier is determined as a physical device that supports both the PGW function and the SGW function.
  • the relay-UE MME may send the information of the selected PGW and the SGW capability indication information to the Mobile Relay.
  • the SGW capability indication information is used to indicate that the PGW supports the SGW function. specific:
  • the Relay-UE MME receives the attach request from the Mobile Relay in step 30, the Relay-UE MME sends the PGW information and the SGW capability indication information to the Mobile Relay through an Attach Accept message;
  • the Relay-UE MME receives the PDN connection request sent by the Mobile Relay in step 30, the Relay-UE MME activates the PGW information and the SGW capability by activating an ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message.
  • the indication information is sent to the Mobile Relay. Further, when the Relay-UE MME selects the PGW for the Mobile Relay in step 31, the Relay-UE MME selects the SGW for the Mobile Relay; then, after step 31, and the Relay-UE MME to the M
  • the Relay-UE MME could trigger the selected SGW and PGW to establish a bearer context for the Mobile Relay.
  • the Relay-UE MME determines an entity device that supports both the PGW function and the SGW function, and the specific implementation may be as follows:
  • the relay-UE MME obtains the information of the PGW pre-configured by the mobile relay from the subscription information of the local or mobile relay.
  • the PGW is a physical device that supports both the PGW function and the SGW function, and selects the PGW as the PGW of the Mobile Relay.
  • the information of the PGW pre-configured for the Mobile Relay may include the identifier and/or address information of the PGW; the subscription information of the Mobile Relay may be stored in the Home Subscriber Server (HSS).
  • HSS Home Subscriber Server
  • the Relay-UE MME may also select the SGW for the Mobile Relay; then, after the step 31, the Relay-UE MME may trigger the selection of the SGW and the PGW as the Mobile.
  • the Relay establishes a bearer context. Then, Relay-UE MME to Mo elay
  • the relay-UE MME triggers the selected SGW and the PGW to establish a bearer context for the Mobile Relay as follows:
  • the Relay-UE MME sends a session creation request (Creat Session Request) to the selected SGW, and the SGW sends the Create Session Request to the selected PGW.
  • the PGW After the PGW establishes a bearer context for the Mobile Relay, it returns a session creation response (Creat Session Response) to the SGW, and the SGW sends the Create Session Response to the Relay-UE MME.
  • the method for indicating information on the OAM side includes the following steps: Step 40: The OAM receives a configuration information request (Configuration Request) message sent by the Mobile Relay. Step 41: The OAM sends the configuration information of the Mobile Relay to the Mobile Relay.
  • the configuration information includes information about the PGW configured for the Mobile Relay and SGW capability indication information, where the PGW is a physical device that supports both the PGW function and the SGW function.
  • the SGW capability indication information is used to indicate that the PGW supports the SGW function.
  • the method for indicating information on the Mobile Relay side includes the following steps: Step 50: The Mobile Relay receives the information of the PGW and the SGW capability indication information of the Mobile Relay sent by the Relay-UE MME or the OAM.
  • the SGW capability indication information is used to indicate that the PGW supports the SGW function.
  • the Mobile Relay can be established on the initiated S1 interface. During the process or the S1 interface update process, the address information of the PGW and the SGW capability indication information are sent to the User-UE MME; or
  • the Mobile Relay After receiving the access request sent by the terminal, the Mobile Relay sends the PGW information and the SGW capability indication information to the User-UE MME through the terminal-related uplink S1 interface application (S1AP) message.
  • the access request may be an access request sent by the terminal during the initial initiation of the access or the process of cutting into the Mobile Relay cell.
  • the Mobile Relay sends the PGW information and the SGW capability indication information to the User-UE MME during the S1 interface setup process or the S1 interface update process, the Mobile Relay is after the PGW information and the SGW capability indication information are sent.
  • the UE sends a terminal-related uplink S1AP message to the User-UE MME to notify the User-UE MME that the terminal has accessed the network through the Mobile Relay.
  • the S1 interface is a logical interface established between the radio access network node and the core network node, and is specifically divided into a control plane interface (S1-MME) and a user plane interface (S1-U).
  • the S1-MME is a logical interface established between the radio access network node and the MME, and is used for transmitting control plane signaling (refer to 3GPP TS36.413 for specific signaling content).
  • S1-U is a logical interface established between the radio access network node and the SGW for transmitting user plane data (see 3GPP TS 29.281 for the format of the user plane data packet).
  • the method for selecting a gateway on the User-UE MME side includes the following steps: Step 60: The User-UE MME receives the information about the PGW of the Mobile Relay and the SGW capability indication information sent by the Mobile Relay, The SGW capability indication information is used to indicate that the PGW supports the SGW function; and the address information of the PGW and the association relationship between the SGW capability indication information and the Mobile Relay are saved;
  • Step 61 The User-UE MME determines that the PGW supports the SGW function according to the saved association relationship, and selects the PGW as the User-UE SGW, that is, selects the PGW as the SGW of the terminal that accesses the Mobile Relay.
  • the User-UE MME may receive the address information of the PGW and the SGW capability indication information during the SI interface establishment process or the S1 interface update process initiated by the Mobile Relay; then, in step 61, the User-UE MME receives the subsequent After the terminal-related uplink S1AP message sent by the Mobile Relay, determining, according to the association relationship, the PGW supports the SGW function, and selecting the PGW as the User-UE SGW; or
  • the User-UE MME receives the PGW related to the uplink SI AP message sent by the Mobile Relay. After the user-UE MME receives the uplink-related S1AP message of the terminal, the user-UE MME determines, according to the association relationship, that the PGW supports the SGW function, and selects the PGW as the User-UE SGW.
  • the User-UE MME may also use the address information in the information of the received PGW as the address information of the SGW of the terminal that accesses the Mobile Relay, and send a session establishment request to the SGW according to the address information. And if the SGW is capable of providing a service to the UE, returning a session establishment response to the User-UE MME to notify the User-UE MME of the session establishment.
  • the downlink data routing path of the UE is: User-UE PGW->User-UE SGW-> Relay-UE PGW->Relay -UE SGW->Donor e B->Mobile Relay->User-UE.
  • the present invention mainly solves the problem of how to optimize the User-UE SGW and the Relay-UE PGW routing, that is, the user-UE SGW function and the Relay-UE PGW function are selected to the same physical device.
  • the network needs to select a device that supports both the PGW and the SGW as the Relay-UE PGW.
  • the Mobile Relay selects the Relay-UE PGW for the Mobile Relay during the process of attaching to the network or initiating the PDN connection, so the Relay-UE MME needs to select one of the Mobile Relays to support both the PGW and the Mobile Relay.
  • the SGW-enabled device carries the Relay-UE PGW function, and the Relay-UE MME sends the address information of the Relay-UE PGW and the support indication of the Relay-UE PGW to the SGW function to the Mobile Relay.
  • the operator can select a device that supports both the PGW and the SGW function in the process of pre-configuring the Relay-UE PGW for the Mobile Relay. Carry the Relay-UE PGW function.
  • the Mobile Relay when the UE accesses the network through the Mobile Relay, the Mobile Relay sends the Relay-UE PGW address information and the capability indication information supported by the Relay-UE PGW to the SGW function to the core of the UE.
  • the User-UE MME determines that the Relay-UE PGW supports the SGW function according to the capability indication information supported by the SGW function by the Relay-UE PGW, and the User-UE MME selects the Relay-UE PGW as the User-UE SGW.
  • the Relay-UE PGW address information is used as the address information of the User-UE SGW.
  • the User-UE MME initiates a session establishment request procedure to the User-UE SGW.
  • the network sends the Relay-UE PGW address and the SGW capability indication to the Mobile Relay during the process of the Mobile Relay attaching to the network or initiating the PDN connection establishment.
  • the Mobile Relay sends the Relay-UE PGW address information and the SGW capability indication to the User-UE MME, and the Secondary User-UE MME performs the User-UE SGW selection for the User-UE.
  • Mobile Relay is attached to the network, or Mobile Relay initiates PDN connection establishment, Mobile The Relay obtains the Relay-UE PGW address information and the SGW capability indication procedure from the Relay-UE MME as shown in FIG. 7A: Step 1.
  • the Mobile Relay establishes a Radio Resource Control (RRC) signaling connection with the DeNB.
  • RRC Radio Resource Control
  • Step 2 For the Attach process initiated by the Mobile Relay, establish a good RRC signaling connection through Step 1.
  • the Mobile Relay sends an Attach Request message to the DeNB, and the DeNB directly transmits the Attach Request message to the Relay-UE MME.
  • Step 2a For the PDN connection establishment process initiated by the Mobile Relay, the Mobile Relay sends a PDN Connectivity Request message to the DeNB, and the DeNB transparently transmits the PDN Connectivity Request message to the Relay-UE MME.
  • the attach process and the PDN connection establishment process are two separate processes, and only one process is performed, and the two do not occur at the same time. That is, only one of step 2 and step 2a is performed.
  • the Relay-UE MME selects the Relay-UE SGW and the Relay-UE PGW for the Mobile Relay according to the current location information of the Mobile Relay.
  • the Relay-UE MME selects a physical device that supports both the PGW function and the SGW function when selecting the Relay-UE PGW for the Mobile Relay.
  • Step 4 The Relay-UE MME sends a session creation request (Creat Session Request) to the Relay-UE SGW;
  • Step 4a The Relay-UE SGW sends a Creat Session Request to the Relay-UE PGW.
  • Step 5a After the Relay-UE PGW establishes a bearer context for the Mobile Relay, it returns a session to the Relay-UE SGW (Creat Session Response);
  • Step 5 The Relay-UE SGW sends the Creat Session Response to the Relay-UE MME.
  • Step 6 For the attach process initiated by the Mobile Relay, the Relay-UE MME sends the Relay-UE PGW address information and the SGW capability indication selected by the Mobile Relay to the Mobile Relay through the Attach Accept message.
  • Step 6a For the PDN connection establishment process initiated by the Mobile Relay, the Relay-UE MME sends the Relay-UE PGW address information and the SGW capability indication selected by the Mobile Relay to the Mobile Relay through the ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message.
  • Step 6 and step 6a will only perform one of them.
  • the Mobile Relay sends the Relay-UE PGW address information and the SGW capability indication to the User-UE MME through the uplink S1 interface setup/S1 interface update message.
  • User The UE MME selects the SGW for the UE according to the Relay-UE PGW address information and the SGW capability indication received during the SI interface setup/SI interface update initiated by the Mobile Relay, as shown in FIG. 7B.
  • Step 1 During the establishment/update of the SI interface initiated by the Mobile Relay, if the Relay-UE PGW is simultaneously supported With the SGW function, the Mobile Relay sends the previously obtained Relay-UE PGW address and SGW capability indication information to the User-UE MME.
  • Step 1 During the initial access procedure initiated by the UE or the process of the UE cutting into the Mobile Relay cell, the UE initiates an access procedure to the Mobile Relay.
  • Step 2 The Mobile Relay sends a UE-related uplink S 1 AP message to the User-UE MME to notify the User-UE MME that the UE has currently accessed the network from the Mobile Relay.
  • Step 3 The User-UE MME determines that the Relay-UE PGW supports the SGW function according to the Relay-UE PGW address information and the SGW capability indication received and locally saved in the Step 0, and the User-UE MME selects the Relay-UE PGW. At the same time, it is used as the User-UE SGW, and the Relay-UE PGW address information is used as the address information of the User-UE SGW.
  • Step 4 The User-UE MME initiates a session establishment request to the User-UE SGW according to the address information of the User-UE SGW obtained in step 3.
  • Step 5 If the User-UE SGW can provide services for the UE, the User-UE SGW returns a session establishment response message to the User-UE MME to notify the User-UE MME that the session establishment is completed.
  • the Mobile Relay can also send the Relay-UE PGW address and the SGW capability indication information to the User-UE MME through the UE-related uplink S1AP message, for the initial connection from the Mobile Relay.
  • the MME enters the UE involved in the UE related uplink S1AP message according to the Relay-UE PGW address and the SGW capability indication information in the received UE-related uplink S1 AP message.
  • SGW selection the specific process is shown in Figure 7C:
  • Step 1 During the initial access procedure initiated by the UE or the process of the UE cutting into the Mobile Relay cell, the UE initiates an access procedure to the Mobile Relay.
  • Step 2 The Mobile Relay sends a UE-related uplink S 1 AP message to the User-UE MME to notify the User-UE MME that the UE has currently accessed the network from the Mobile Relay.
  • the Mobile Relay needs to carry the previously obtained Relay-UE PGW address and SGW capability indication information in the UE related uplink S 1AP message and send it to the User-UE MME.
  • Step 3 The User-UE MME determines that the Relay-UE PGW supports the SGW function according to the capability indication information supported by the SGW function in the Relay-UE PGW obtained in the step 2, and the User-UE MME selects the Relay-UE PGW as the User- The UE SGW, and uses the Relay-UE PGW address information as the address information of the User-UE SGW.
  • Step 4 The User-UE MME initiates a session establishment request to the User-UE SGW according to the address information of the User-UE SGW obtained in step 3.
  • Step 5 If the User-UE SGW can provide services for the UE, the User-UE SGW returns a session establishment response message to the User-UE MME to notify the User-UE MME that the session establishment is completed.
  • the network pre-configures the Relay-UE PGW for the Mobile Relay, which is attached to the Mobile Relay.
  • the network selects a fixed Relay-UE PGW for the Mobile Relay.
  • the network management system sends the Relay-UE PGW address and the SGW capability indication information that are fixedly configured for the Mobile Relay to the Mobile Relay.
  • the Mobile Relay sends the Relay-UE PGW information to the User-UE MME to assist the User-UE MME in selecting the gateway for the User-UE.
  • the Relay-UE MME selects the Relay-UE PGW for the Mobile Relay according to the subscription data information in the HSS or the Mobile Relay PGW information stored locally by the Relay-UE MME. Because the Relay-UE PGW is pre-configured, it can ensure that the Relay-UE PGW supports the SGW function at the same time. The specific process is shown in Figure 7D:
  • Step 0. The operator configures the Relay-UE PGW ID and address information that is configured for the Mobile Relay to the Relay-UE MME or the subscription data saved to the HSS.
  • the configured Relay-UE PGW supports both PGW and SGW functions.
  • Step 1 The Mobile Relay establishes an RRC signaling connection with the DeNB. Details of the establishment of the RRC signaling connection can be found in 3GPP TS 36.331, which is not described in detail here.
  • Step 2 For the Attach process initiated by the Mobile Relay, the Mobile Relay sends an Attach Request message to the DeNB through the RRC signaling connection established in Step 1.
  • the DeNB transparently transmits the Attach Request message to the Relay-UE MME.
  • Step 2a For the PDN connection establishment process initiated by the Mobile Relay, the Mobile Relay sends a PDN connectivity request message to the DeNB, and the DeNB transparently transmits the PDN connectivity request message to the Relay-UE MME.
  • Step 3 The Relay-UE MME selects the Relay-UE PGW for the Mobile Relay according to the subscription information saved in the HSS or the Mobile Relay PGW identifier or address information stored locally by the Relay-UE MME.
  • Step 4 The Relay-UE MME sends a session creation request (Creat Session Request) to the Relay-UE SGW;
  • Step 4a The Relay-UE SGW sends a Creat Session Request to the Relay-UE PGW.
  • Step 5a After the Relay-UE PGW establishes a bearer context for the Mobile Relay, it returns a session to the Relay-UE SGW (Creat Session Response);
  • Step 5 The Relay-UE SGW sends the Creat Session Response to the Relay-UE MME.
  • Step 6 For the attach process initiated by the Mobile Relay, the Relay-UE MME returns an Attach Accept message to the Mobile Relay.
  • Step 6a For the PDN connection establishment process initiated by the Mobile Relay, the Relay-UE MME returns an ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message to the Mobile Relay.
  • Step 6 and step 6a will only perform one of them.
  • the Mobile Relay Before the Mobile Relay enters the working state as the base station, the Mobile Relay first initiates a connection process to the OAM and requests configuration information from the OAM.
  • the OAM sends the configuration information prepared by the operator to the Mobile Relay according to the identity (ID) of the Mobile Relay.
  • the configuration information includes the identifier, address information, and SGW capability indication information of the Relay-UE PGW.
  • the specific process is shown in Figure 7E.
  • Step 1 The Mobile Relay initiates the connection process to the OAM, and requests configuration information from 0 AM.
  • the Mobile Relay ID information is carried in the configuration information request message.
  • Step 2 The OAM sends the configuration information prepared by the operator to the Mobile Relay according to the Mobile Relay ID.
  • the configuration information includes the ID and address information of the Relay-UE PGW, the SGW capability indication, and the User-UE MME address information.
  • the Mobile Relay locally stores the ID and address information of the Relay-UE PGW, the SGW capability indication, and the User-UE MME address information.
  • Step 3 The Mobile Relay initiates an S1 connection establishment process to the User-UE MME according to the configuration information obtained in step 2, and establishes an S1-MME interface with the User-UE MME.
  • the ID and address information of the Relay-UE PGW saved in the OAM are consistent with the Relay-UE PGW identifier and address information fixedly configured in the contract data of the HS-MME or the HSS.
  • the Mobile Relay sends the Relay-UE PGW address and the SGW capability indication information to the User-UE MME through the uplink S1 interface setup/S1 interface update message, for the UE initially accessed from the Mobile Relay or by the UE switching to the Mobile Relay cell.
  • the User-UE MME selects the SGW for the UE according to the Relay-UE PGW address and the SGW capability indication received during the SI interface establishment/SI interface update initiated by the Mobile Relay, as shown in FIG. 7B.
  • the Mobile Relay can also send the Relay-UE PGW address and the SGW capability indication information to the User-UE MME through the UE-related uplink S1AP message, for the initial connection from the Mobile Relay.
  • the MME enters the UE involved in the UE related uplink S1AP message according to the Relay-UE PGW address and the SGW capability indication information in the received UE-related uplink S1 AP message. SGW selection, the specific process is shown in Figure 7C.
  • an embodiment of the present invention further provides a wireless communication system, where the system includes:
  • the Relay-UE MME 801 receives an attach request or a PDN connection request sent by the Mobile Relay, determines an entity device that supports both the PGW function and the SGW function, and selects the physical device as the PGW of the Mobile Relay; the PGW information and the SGW capability indication The information is sent to the Mobile Relay; the SGW capability indication information is used to indicate that the PGW supports the SGW function;
  • a Mobile Relay 802 configured to send the received PGW information and SGW capability indication information sent by the Relay-UE MME to the User-UE MME;
  • the user-UE MME 803 is configured to receive the information about the PGW and the SGW capability indication information sent by the Mobile Relay, and save the address information of the PGW and the association relationship between the SGW capability indication information and the Mobile Relay; The relationship determines that the PGW supports the SGW function, and selects the PGW as the SGW of the terminal accessing the Mobile Relay.
  • an embodiment of the present invention further provides a wireless communication system, where the system includes:
  • the Relay-UE MME811 is configured to receive an attach request or a PDN connection request sent by the Mobile Relay, determine an entity device that supports both the PGW function and the SGW function, and select the physical device as the Mobile Relay.
  • the OAM812 is configured to receive a configuration information request message sent by the Mobile Relay, and send the configuration information of the Mobile Relay to the Mobile Relay, where the configuration information includes information about the PGW configured for the Mobile Relay and SGW capability indication information, where the PGW is simultaneously supported.
  • the configuration information includes information about the PGW configured for the Mobile Relay and SGW capability indication information, where the PGW is simultaneously supported.
  • a physical device of the PGW function and the SGW function, and the PGW and the Relay-UE MME are the same as the PGW selected by the Mobile Relay;
  • the SGW capability indication information is used to indicate that the PGW supports the SGW function;
  • a Mobile Relay 813 configured to send the information of the PGW and the SGW capability indication information sent by the received OAM to the User-UE MME;
  • the user-UE MME 814 is configured to receive information about the PGW and the SGW capability indication information sent by the Mobile Relay, and save the address information of the PGW and the association relationship between the SGW capability indication information and the Mobile Relay, and determine, according to the association relationship, the PGW supports the SGW function, and The PGW is selected as the SGW of the terminal accessing the Mobile Relay.
  • the embodiment of the present invention further provides a Relay-UE MME, where the Relay-UE MME includes: a receiving unit 90, configured to receive an attach request or a PDN connection request sent by the Mobile Relay;
  • the selecting unit 91 is configured to determine a physical device that supports both the PGW function and the SGW function, and select the physical device as the PGW of the Mobile Relay.
  • the selection unit 91 is used to:
  • the information about the PGW pre-configured by the Mobile Relay is obtained from the subscription information of the local or Mobile Relay.
  • the PGW is a physical device that supports both the PGW function and the SGW function.
  • the PGW is selected as the PGW of the Mobile Relay.
  • the selection unit 91 is used to:
  • Obtaining the SGW query result list and the PGW result list by querying the domain name service system DNS, determining the device identifiers that appear in the SGW query result list and the PGW result list, and determining the gateway device corresponding to the device identifier to simultaneously support the PGW function and SGW-enabled physical device.
  • the Relay-UE MME further includes:
  • the indicating unit 92 is configured to send information about the PGW and the SGW capability indication information to the Mobile Relay.
  • the SGW capability indication information is used to indicate that the PGW supports the SGW function.
  • the indication unit 92 is configured to:
  • the receiving unit receives the attach request sent by the Mobile Relay, the device accepts the Attach Accept message, and sends the PGW information and the SGW capability indication information to the Mobile Relay; If the receiving unit receives the PDN connection request sent by the Mobile Relay, the PGW information and the SGW capability indication information are sent to the Mobile Relay by activating an ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message.
  • the selection unit 91 is further configured to:
  • the SGW is also selected for the Mobile Relay;
  • the Relay-UE MME further includes:
  • a context establishing unit 93 configured to trigger after the selecting unit selects the PGW and the SGW for the Mobile Relay
  • the SGW and the PGW establish a bearer context for the Mobile Relay.
  • an embodiment of the present invention further provides an 0 AM, where the OAM includes:
  • the receiving unit 101 is configured to receive a configuration information request message sent by the Mobile Relay.
  • the indicating unit 102 is configured to send the configuration information of the Mobile Relay to the Mobile Relay, where the configuration information includes a packet data gateway PGW configured for the Mobile Relay and a service gateway SGW capability indication information, where
  • the PGW is an entity device that supports both the PGW function and the SGW function, and the SGW capability indication information is used to indicate the
  • the PGW supports the SGW function.
  • an embodiment of the present invention further provides a Mobile Relay
  • the mobile relay includes: a receiving unit 101, configured to receive information about a PGW of the Mobile Relay and SGW capability indication information sent by the Relay-UE MME or the OAM, where The SGW capability indication information is used to indicate that the PGW supports the SGW function, and the indication unit 102 is configured to send the information of the PGW and the SGW capability indication information to the User-UE MME.
  • the indication unit 102 is configured to:
  • the S1 AP message After receiving the access request sent by the terminal, the S1 AP message is applied to the uplink related S1 interface of the terminal, and the PGW information and the SGW capability indication information are sent to the User-UE MME.
  • the indication unit 102 is further configured to:
  • the access request sent by the terminal is received, and the terminal related uplink S1 is sent to the User-UE MME.
  • the AP message is sent to notify the User-UE MME that the terminal has accessed the network through the Mobile Relay.
  • the embodiment of the present invention further provides a User-UE MME, where the User-UE MME includes: a receiving unit 111, configured to receive information about the Mobile Relay packet data gateway PGW and the serving gateway SGW capability sent by the Mobile Relay. Instructing information, the SGW capability indication information is used to indicate that the PGW supports the SGW function; the address information of the PGW and the association relationship between the SGW capability indication information and the Mobile Relay are saved; the selecting unit 112 is configured to determine, according to the association relationship, the PGW to support the SGW function, And select the PGW as the interface The SGW of the terminal that enters the Mobile Relay.
  • a receiving unit 111 configured to receive information about the Mobile Relay packet data gateway PGW and the serving gateway SGW capability sent by the Mobile Relay. Instructing information, the SGW capability indication information is used to indicate that the PGW supports the SGW function; the address information of the PGW and the association relationship between the SGW capability indication information and the Mobile Relay are saved; the selecting unit 112 is configured to
  • the receiving unit 111 is configured to: receive the PGW information and the SGW capability indication information during the SI interface establishment process or the S1 interface update process initiated by the Mobile Relay; the selecting unit 112 is configured to: subsequently receive the terminal sent by the Mobile Relay After the S1 AP message is applied to the uplink S1 interface, the PGW is supported by the PGW according to the association relationship, and the PGW is selected as the SGW of the terminal that accesses the Mobile Relay; or
  • the receiving unit 111 is configured to: receive the information about the PGW and the SGW capability indication information by using the terminal related uplink S1 AP message sent by the Mobile Relay; the selecting unit 112 is configured to: after receiving the uplink S1AP message related to the terminal, according to the association The relationship determines that the PGW supports the SGW function, and selects the PGW as the SGW of the terminal accessing the Mobile Relay.
  • the User-UE MME further includes:
  • the session establishing unit 113 is configured to use the address information of the PGW as the address information of the SGW of the terminal that accesses the Mobile Relay, and send a session establishment request to the SGW according to the address information.
  • the beneficial effects of the present invention include:
  • the Relay-UE MME selects a physical device that supports both the PGW function and the SGW function as the PGW of the Mobile Relay during the network attachment or PDN connection establishment initiated by the Mobile Relay; and the Relay-UE MME Sending the information of the PGW and the SGW capability indication information to the Mobile Relay, or after receiving the configuration information request message sent by the Mobile Relay, the OAM sends the information including the PGW and the configuration information of the SGW capability indication information to the Mobile Relay; Then, the Mobile Relay sends the PGW address information and the SGW capability indication information to the User-UE MME.
  • the User-UE MME determines that the PGW supports the SGW function according to the received information, and selects the PGW as the terminal that accesses the Mobile Relay. SGW.
  • the PGW ie, the Relay-UE PGW
  • the SGW ie, the User-UE SGW
  • the PGW selected by the Mobile Relay on the network side
  • the SGW ie, the User-UE SGW
  • the UE under the Mobile Relay are located in the same physical device, and then, in the UE Downstream data routing path: User-UE PGW-> User-UE SGW-> Relay-UE PGW-> Relay-UE SGW-> Donor e B-> Mobile Relay -> User-UE, User-UE SGW to Relay-
  • the transmission distance of the UE PGW is almost zero, so that the optimization of the downlink data routing path of the UE is guaranteed, because the routing path of the downlink data changes with the movement of the Mobile Relay, but the Relay-UE in the mobile relay process
  • the PGW
  • the invention ensures the optimization of the data routing of the UE under the Mobile Relay after the introduction of the Mobile Relay, which is beneficial to save the transmission resources on the network side, and the other party is beneficial to reduce the data transmission delay of the UE.
  • embodiments of the present invention can be provided as a method, system, or computer program.
  • Product may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • present invention is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请实施例公开了一种信息指示及网关选择方法、系统和设备，涉及无线通信技术领域，用于解决移动中继设备Mobile Relay下的终端的下行数据路由路径的优化性得不到保证的问题。本申请中，中继终端移动性管理实体Relay-UE MME或操作与维护系统OAM将Mobile Relay的分组数据网关PGW的信息和服务网关SGW能力指示信息发送给Mobile Relay；Mobile Relay将接收到的信息发送给用户终端移动性管理实体User-UE MME；User-UE MME选择该PGW作为接入Mobile Relay的终端的SGW。釆用本申请，所述下行数据路由路径的优化性能够得到保证。

Description

一种信息指示及网关选择方法、 系统和设备 本申请要求在 2011年 10月 26日提交中国专利局、 申请号为 201110329999.0、发明名 称为"一种信息指示及网关选择方法、 系统及设备"的中国专利申请的优先权， 其全部内容 通过引用结合在本申请中。
技术领域
本发明涉及无线通信领域， 尤其涉及一种信息指示及网关选择方法、 系统和设备。 背景技术
现有技术中， 为终端（ UE )选择服务网关（ SGW )主要根据 UE当前的位置和网络的 拓朴关系， 从而保证为当前 UE服务的 SGW到 UE当前的服务基站的路由总是优化的。
网络为 UE选择 SGW的方案如下：
网络为 UE选择 SGW主要参考 UE当前的位置，如图 1所示，核心网站点（ Core Network site ) 1的 SGW1与基站站点 （Base station site ) 1/2/3的基站相连， Core Network site2的 SGW2与 Base station site4/5/6的基站相连， 随着 UE的移动， UE的服务基站不断改变， 当 UE移动出 Core Network sitel的设备服务区域外， 网络将为 UE选择 Core Network site2的 设备 SGW2继续提供服务。
UE的下行数据路由路径为： 分组数据网络（ PDN GW ) ->SGW -> Base station->UE, 如图 1所示， 随着 UE的移动， UE的下行数据路由路径也随之改变。
移动中继设备 ( Mobile Relay ) 弓 |入之后， 系统架构图如图 2所示， 其中 Mobile Relay 在两重网络中分别赋予了两重身份， 首先对于中继网络单元（ Relay Network Element )组 成的网络中 （由标号为 1的设备组成的网络）， Mobile Relay在网络中作为普通 UE工作； 而在终端网络单元（ UE Network Element )构成的网络中（由标号为 2的设备组成的网络）， Mobile Relay在网络中作为基站（ eNB ) 工作。
如图 2所示， 从 Relay Network Element组成的网络的层面来看， Mobile Relay作为普 通 UE来工作，因此随着 Mobile Relay的移动， Mobile Relay的服务基站即施主基站（ Donor eNB, De B ) 以及 SGW在不断改变。
另一方面， 从 UE network element构成的网络的层面来看， Mobile Relay作为 eNB工 作， 而 Mobile Relay下真正的用户 UE ( User-UE ) 实际上并不知道 Mobile Relay是特殊的 基站， 也不知道 Mobile Relay在移动。
Mobile Relay引入后 User-UE的下行数据路由路径为：用户终端分组数据网关（ User-UE PGW ) ->用户终端服务网关（ User-UE SGW ) -> 中继终端分组数据网关（ Relay-UE PGW ) -> 中继终端服务网关（ Relay-UE SGW ) -> Donor e B-> Mobile Relay -> User-UE, 其中下 行数据的传输路径会随 Mobile Relay的移动而发生改变。 在实现本发明的过程中， 发明人发现现有技术中存在以下技术问题：
现有技术中， 在引入 Mobile Relay之前， 网络为 UE选择 SGW通常从网络的拓朴结 构进行考虑， 从而保证 eNB本身到 SGW之间的路由总是优化的。 但是 Mobile Relay引入 后， 随着 Mobile Relay本身的移动， 网络的拓朴结构也将随之改变， 因此现有技术已经不 能保证网络为 Mobile Relay下的 UE (即 User-UE )选择的 SGW (即 User-UE SGW )到 Mobile Relay的路由仍然是优化的。
发明内容
本发明实施例提供一种信息指示及网关选择方法、系统和设备，用于解决 Mobile Relay 下的 UE的下行数据路由路径的优化性得不到保证的问题 。
一种网关选择方法， 该方法包括：
中继终端移动性管理实体 Relay-UE MME接收移动中继设备 Mobile Relay发送的附着 请求或分组数据网络 PDN连接请求；
所述 Relay-UE MME确定同时支持分组数据网关 PGW功能和服务网关 SGW功能的 实体设备， 并选择该实体设备作为该 Mobile Relay的 PGW。
一种信息指示方法， 该方法包括：
操作与维护系统 OAM接收移动中继设备 Mobile Relay发送的配置信息请求消息； 所述 OAM将所述 Mobile Relay的配置信息发送给所述 Mobile Relay , 该配置信息中 包括为所述 Mobile Relay配置的分组数据网关 PGW的信息和服务网关 SGW能力指示信 息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备 , 该 SGW能力指示信息用于 指示该 PGW支持 SGW功能。
一种信息指示方法， 该方法包括：
移动中继设备 Mobile Relay接收中继终端移动性管理实体 Relay-UE MME或操作与维 护系统 OAM发送的该 Mobile Relay的分组数据网关 PGW的信息和服务网关 SGW能力指 示信息， 该 SGW能力指示信息用于指示该 PGW支持 SGW功能；
所述 Mobile Relay将所述 PGW的信息和 SGW能力指示信息，发送给用户终端移动性 管理实体 User-UE MME。
一种网关选择方法， 该方法包括：
用户终端移动性管理实体 User-UE MME接收移动中继设备 Mobile Relay发送的该 Mobile Relay的分组数据网关 PGW的信息和服务网关 SGW能力指示信息， 该 SGW能力 指示信息用于指示该 PGW支持 SGW功能； 保存该 PGW的地址信息以及 SGW能力指示 信息与所述 Mobile Relay的关联关系；
所述 User-UE MME根据所述关联关系确定所述 PGW支持 SGW功能，并选择该 PGW 作为接入该 Mobile Relay的终端的 SGW。 一种中继终端移动性管理实体 Relay-UE MME, 该 Relay-UE MME包括： 接收单元，用于接收移动中继设备 Mobile Relay发送的附着请求或分组数据网络 PDN 连接请求；
选择单元，用于确定同时支持分组数据网关 PGW功能和服务网关 SGW功能的实体设 备， 并选择该实体设备作为该 Mobile Relay的 PGW。
一种操作与维护系统 OAM, 该 OAM包括：
接收单元， 用于接收移动中继设备 Mobile Relay发送的配置信息请求消息； 发送单元， 用于将所述 Mobile Relay的配置信息发送给所述 Mobile Relay, 该配置信 息中包括为所述 Mobile Relay配置的分组数据网关 PGW的信息和服务网关 SGW能力指示 信息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备 , 该 SGW能力指示信息用 于指示该 PGW支持 SGW功能。
一种移动中继设备 Mobile Relay , 该 Mobile Relay包括：
接收单元，用于接收中继终端移动性管理实体 Relay-UE MME或操作与维护系统 OAM 发送的该 Mobile Relay的分组数据网关 PGW的信息和服务网关 SGW能力指示信息， 该 SGW能力指示信息用于指示该 PGW支持 SGW功能；
发送单元，用于将所述 PGW的信息和 SGW能力指示信息，发送给用户终端移动性管 理实体 User-UE MME。
一种用户终端移动性管理实体 User-UE MME, 该 User-UE MME包括：
接收单元， 用于接收移动中继设备 Mobile Relay发送的该 Mobile Relay的分组数据网 关 PGW的信息和服务网关 SGW能力指示信息， 该 SGW能力指示信息用于指示该 PGW 支持 SGW功能； 保存该 PGW的地址信息以及 SGW能力指示信息与所述 Mobile Relay的 关联关系；
选择单元， 用于根据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作 为接入该 Mobile Relay的终端的 SGW。
一种无线通信系统， 该系统包括：
中继终端移动性管理实体 Relay-UE MME, 用于接收移动中继设备 Mobile Relay发送 的附着请求或分组数据网络 PDN连接请求，确定同时支持分组数据网关 PGW功能和服务 网关 SGW功能的实体设备，并选择该实体设备作为该 Mobile Relay的 PGW;将所述 PGW 的信息和 SGW能力指示信息， 发送给所述 Mobile Relay; 所述 SGW能力指示信息用于指 示所述 PGW支持 SGW功能；
Mobile Relay, 用于将接收到的所述 Relay-UE MME发送的 PGW的信息和 SGW能力 指示信息， 发送给用户终端移动性管理实体 User-UE MME;
User-UE MME, 用于接收所述 Mobile Relay发送的 PGW的信息和 SGW能力指示信 息；保存该 PGW的地址信息以及 SGW能力指示信息与所述 Mobile Relay的关联关系；根 据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay 的终端的 SGW。
一种无线通信系统， 该系统包括：
中继终端移动性管理实体 Relay-UE MME, 用于接收移动中继设备 Mobile Relay发送 的附着请求或分组数据网络 PDN连接请求，确定同时支持分组数据网关 PGW功能和服务 网关 SGW功能的实体设备 , 并选择该实体设备作为该 Mobile Relay的 PGW;
操作与维护系统 OAM, 用于接收 Mobile Relay发送的配置信息请求消息； 将所述 Mobile Relay的配置信息发送给所述 Mobile Relay, 该配置信息中包括为所述 Mobile Relay 配置的 PGW的信息和 SGW能力指示信息， 该 PGW为同时支持 PGW功能和 SGW功能 的实体设备， 并且该 PGW与所述 Relay-UE MME为该 Mobile Relay选择的 PGW相同； 该 SGW能力指示信息用于指示该 PGW支持 SGW功能；
Mobile Relay,用于将接收到的所述 OAM发送的 PGW的信息和 SGW能力指示信息， 发送给用户终端移动性管理实体 User-UE MME;
User-UE MME, 用于接收所述 Mobile Relay发送的 PGW的信息和 SGW能力指示信 息；保存该 PGW的地址信息以及 SGW能力指示信息与所述 Mobile Relay的关联关系；根 据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay 的终端的 SGW。
本发明实施例提供的方案中，网络侧为 Mobile Relay选择的 PGW(即 Relay-UE PGW ) 和为接入 Mobile Relay的 UE选择的 SGW (即 User-UE SGW )，位于同一实体设备， 那么， 在该 UE的下行数据路由路径： User-UE PGW-> User-UE SGW-> Relay-UE PGW-> Relay-UE SGW-> Donor e B-> Mobile Relay -> User-UE中， User-UE SGW到 Relay-UE PGW的传输 距离几乎为零， 使得 UE的下行数据路由路径的优化性得到了保证。
附图说明
图 1为现有技术中的 SGW的选择示意图；
图 2为现有技术中 User-UE随 Mobile Relay的移动过程示意图；
图 3为本发明实施例提供的方法流程示意图；
图 4为本发明实施例提供的另一方法流程示意图；
图 5为本发明实施例提供的再一方法流程示意图；
图 6为本发明实施例提供的又一方法流程示意图；
图 7A为本发明实施例一的流程示意图；
图 7B为本发明实施例二的流程示意图；
图 7C为本发明实施例三的流程示意图； 图 7D为本发明实施例四的流程示意图；
图 7E为本发明实施例五的流程示意图；
图 8A为本发明实施例提供的系统结构示意图；
图 8B为本发明实施例提供的另一系统结构示意图；
图 9为本发明实施例提供的设备结构示意图；
图 10为本发明实施例提供的另一设备结构示意图；
图 11为本发明实施例提供的又一设备结构示意图。
具体实施方式
为了能够保证移动中继设备 ( Mobile Relay ) 下的 UE的下行数据路由路径的优化性， 本发明实施例提供一种信息指示及网关选择方法， 本方法中， 中继终端移动性管理实体 ( Relay-UE MME )在 Mobile Relay发起的网络附着或分组数据网络（ PDN )连接建立过 程中， 选择同时支持分组数据网关（ PGW )功能和服务网关（ SGW )功能的实体设备作为 该 Mobile Relay的 PGW即中继终端分组数据网关（ Relay-UE PGW ), 并将该 PGW的信息 和 SGW能力指示信息发送给 Mobile Relay; Mobile Relay再将该 PGW的信息和 SGW能 力指示信息发送给 User-UE MME; User-UE MME根据接收到的信息确定该 PGW支持 SGW 功能， 并选择该 PGW作为用户终端服务网关 User-UE SGW, 即作为接入该 Mobile Relay 的终端的 SGW。 或者，
预先在 Relay-UE MME/HSS、 以及 OAM中预先配置 Mobile Relay的 PGW的信息， 该 PGW 为同时支持 PGW 功能和 SGW 功能的实体设备， 并且要保证在 Relay-UE MME/HSS、 以及 OAM中配置的信息一致。 那么， Relay-UE MME在 Mobile Relay发起的 网络附着或 PDN连接建立过程中， 根据配置信息为 Mobile Relay选择 PGW。 OAM在接 收到 Mobile Relay发送的配置信息请求消息后， 将包括预先配置的 Mobile Relay的 PGW 的信息和 SGW能力指示信息的配置信息发送给 Mobile Relay; Mobile Relay再将该 PGW 的信息和 SGW能力指示信息发送给 User-UE MME; User-UE MME根据接收到的信息确 定该 PGW支持 SGW功能，并选择该 PGW作为 User-UE SGW,即作为接入该 Mobile Relay 的终端的 SGW。
参见图 3 , 为本发明实施例提供的 Relay-UE MME侧的网关选择方法， 包括以下步骤： 步骤 30: Relay-UE MME接收 Mobile Relay发送的附着请求或 PDN连接请求； 步骤 31： Relay-UE MME确定同时支持 PGW功能和 SGW功能的实体设备 , 并选择 该实体设备作为该 Mobile Relay的 PGW。
作为一种实施方式， 步骤 31中， Relay-UE MME确定同时支持 PGW功能和 SGW功 能的实体设备， 其具体实现可以如下：
Relay-UE MME通过查询域名服务系统（ DNS ), 获得 SGW查询结果列表和 PGW结 果列表；确定同时出现在该 SGW查询结果列表和 PGW结果列表中的设备标识 ,将该设备 标识对应的网关设备确定为同时支持 PGW功能和 SGW功能的实体设备。
相应的， 在步骤 31之后， Relay-UE MME可以将选择的 PGW的信息和 SGW能力指 示信息， 发送给 Mobile Relay; 该 SGW能力指示信息用于指示该 PGW支持 SGW功能。 具体的：
若 Relay-UE MME在步骤 30中接收到 Mobile Relay发出的附着请求， 则 Relay-UE MME通过附着接受 （ Attach Accept ) 消息， 将 PGW的信息和 SGW能力指示信息发送给 Mobile Relay;
若 Relay-UE MME在步骤 30中接收到 Mobile Relay发出的 PDN连接请求，则 Relay-UE MME通过激活默认演进分组系统承载上下文请求（ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST )消息， 将 PGW的信息和 SGW能力指示信息发送给 Mobile Relay„ 进一步的，在步骤 31中 Relay-UE MME为 Mobile Relay选择 PGW时， Relay-UE MME 以为该 Mobile Relay选择 SGW;那么，在步骤 31之后、并且 Relay-UE MME向 M
Figure imgf000007_0001
之前， Relay-UE MME可以触发选择的 SGW和 PGW为 Mobile Relay建立承载上下文。
作为另一种实施方式， 步骤 31中， Relay-UE MME确定同时支持 PGW功能和 SGW 功能的实体设备， 其具体实现可以如下：
Relay-UE MME从本地或 Mobile Relay的签约信息中获取为该 Mobile Relay预先配置 的 PGW的信息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备； 并选择该 PGW 作为该 Mobile Relay的 PGW。 这里， 为该 Mobile Relay预先配置的 PGW的信息可以包括 PGW 的标识和 /或地址信息； Mobile Relay 的签约信息可以保存在归属签约用户服务器 ( HSS ) 中。
进一步的，在步骤 31中 Relay-UE MME为 Mobile Relay选择 PGW时， Relay-UE MME 还可以为该 Mobile Relay选择 SGW; 那么， 在步骤 31之后， Relay-UE MME可以触发选 SGW和 PGW为 Mobile Relay建立承载上下文。然后， Relay-UE MME向 Mo elay
Figure imgf000007_0002
Relay-UE MME触发选择的 SGW和 PGW为 Mobile Relay建立承载上下文的步骤如下： Relay-UE MME向选择的 SGW发送会话创建请求（ Creat Session Request ), 该 SGW 将 Creat Session Request发送给选择的 PGW, 该 PGW为 Mobile Relay建立承载上下文后， 向该 SGW返回会话创建响应（ Creat Session Response ), 该 SGW将 Creat Session Response 发送给 Relay-UE MME。
参见图 4, 为本发明实施例提供的 OAM侧的信息指示方法， 包括以下步骤： 步骤 40: OAM接收 Mobile Relay发送的配置信息请求（ Configuration Request )消息； 步骤 41： OAM将 Mobile Relay的配置信息发送给该 Mobile Relay , 该配置信息中包 括为该 Mobile Relay配置的 PGW的信息和 SGW能力指示信息，该 PGW为同时支持 PGW 功能和 SGW功能的实体设备， 该 SGW能力指示信息用于指示该 PGW支持 SGW功能。
参见图 5 , 为本发明实施例提供的 Mobile Relay侧的信息指示方法， 包括以下步骤： 步骤 50: Mobile Relay接收 Relay-UE MME或 OAM发送的该 Mobile Relay的 PGW 的信息和 SGW能力指示信息， 该 SGW能力指示信息用于指示该 PGW支持 SGW功能； 步骤 51： Mobile Relay将接收到的 PGW的信息和 SGW能力指示信息，发送给 User-UE 步骤 51中， Mobile Relay可以在发起的 S1接口建立过程或 S1接口更新过程中， 将 PGW的地址信息和 SGW能力指示信息发送给 User-UE MME; 或者，
Mobile Relay在接收到终端发送的接入请求后，通过终端相关上行 S1接口应用（ S1AP ) 消息， 将 PGW的信息和 SGW能力指示信息发送给 User-UE MME。 这里， 接入请求可以 是终端在发起初始接入时或切入 Mobile Relay小区的过程中， 发送的接入请求。
若 Mobile Relay在发起的 S1接口建立过程或 S1接口更新过程中， 将 PGW的信息和 SGW能力指示信息发送给 User-UE MME,则在发送该 PGW的信息和 SGW能力指示信息 之后， Mobile Relay在接收终端发送的接入请求时， 向 User-UE MME发送终端相关上行 S1AP消息， 以向 User-UE MME通知该终端已通过该 Mobile Relay接入网络。
S1 接口是无线接入网节点与核心网节点间建立的逻辑接口， 具体又分为控制面接口 ( S1-MME )和用户面接口 （Sl-U )。 S1-MME是无线接入网节点与 MME之间建立的逻辑 接口， 用于传输控制面信令（信令具体内容参见 3GPP TS36.413 )。 S1-U是无线接入网节 点与 SGW之间建立的逻辑接口， 用于传输用户面数据 （用户面数据包格式参见 3GPP TS29.281 )。
参见图 6, 为本发明实施例提供的 User-UE MME侧的网关选择方法， 包括以下步骤： 步骤 60: User-UE MME接收 Mobile Relay发送的该 Mobile Relay的 PGW的信息和 SGW能力指示信息，该 SGW能力指示信息用于指示该 PGW支持 SGW功能；保存该 PGW 的地址信息以及 SGW能力指示信息与该 Mobile Relay的关联关系；
步骤 61： User-UE MME根据保存的关联关系确定该 PGW支持 SGW功能， 并选择该 PGW作为 User-UE SGW, 即选择该 PGW作为接入 Mobile Relay的终端的 SGW。
具体的， 步骤 60中 User-UE MME可以在 Mobile Relay发起的 SI接口建立过程或 S1 接口更新过程中， 接收到 PGW的地址信息和 SGW能力指示信息； 则步骤 61中 User-UE MME在后续接收到 Mobile Relay发送的终端相关上行 S1AP消息后，根据所述关联关系确 定该 PGW支持 SGW功能， 并选择该 PGW作为 User-UE SGW; 或者，
步骤 60中 User-UE MME通过 Mobile Relay发送的终端相关上行 SI AP消息，接收 PGW 的地址信息和 SGW能力指示信息； 则步骤 61中 User-UE MME在接收到该终端相关上行 S1AP消息后，根据所述关联关系确定该 PGW支持 SGW功能，并选择该 PGW作为 User-UE SGW。
进一步的， 在步骤 61之后 User-UE MME还可以将接收到的 PGW的信息中的地址信 息作为接入该 Mobile Relay的终端的 SGW的地址信息，并根据该地址信息向该 SGW发送 会话建立请求， 若该 SGW能够为 UE提供服务， 则向 User-UE MME返回会话建立响应， 以通知 User-UE MME会话建立。
下面对本发明进行具体说明：
本发明的主要思想： 根据背景技术可以看出， 当 UE从 Mobile Relay接入网络时， UE 的下行数据路由路径为： User-UE PGW->User-UE SGW-> Relay-UE PGW->Relay-UE SGW->Donor e B->Mobile Relay->User-UE。 本发明主要解决如何优化 User-UE SGW和 Relay-UE PGW路由的问题， 即实现将 User-UE SGW功能和 Relay-UE PGW功能选择到同 一个实体设备上。
为实现将 User-UE SGW功能和 Relay-UE PGW功能选择到同一个实体设备上， 首先 在网络为 Relay-UE选择 PGW的时候， 网络需要选择一个同时支持 PGW和 SGW的设备 为 Relay-UE PGW。 对于实施例 1 , Mobile Relay在附着到网络过程中或发起 PDN连接过 程中， 由 Relay-UE MME为 Mobile Relay选择 Relay-UE PGW, 因此 Relay-UE MME需要 为 Mobile Relay尽量选择一个同时支持 PGW和 SGW功能的设备来承载 Relay-UE PGW功 能， 此外 Relay-UE MME将 Relay-UE PGW的地址信息以及 Relay-UE PGW对 SGW功能 的支持指示发送给 Mobile Relay。对于实施例 2 ,由于 Relay-UE PGW是提前为 Mobile Relay 配置好的， 因此可以在为 Mobile Relay提前预配置 Relay-UE PGW的过程中， 运营商可以 选择一个同时支持 PGW和 SGW功能的设备来承载 Relay-UE PGW功能。
在实施例 1和实施例 2中， 当 UE通过 Mobile Relay接入到网络过程中， Mobile Relay 将 Relay-UE PGW地址信息， 以及 Relay-UE PGW对 SGW功能支持的能力指示信息发送 给 UE的核心网设备 User-UE MME, User-UE MME根据 Relay-UE PGW对 SGW功能支持 的能力指示信息判断出 Relay-UE PGW支持 SGW功能， 则 User-UE MME选择 Relay-UE PGW同时作为 User-UE SGW, 并将 Relay-UE PGW地址信息作为 User-UE SGW的地址信 息。根据 User-UE SGW地址信息， User-UE MME向 User-UE SGW发起会话建立请求过程。
实施例 1 中， 在 Mobile Relay 附着到网络或者发起 PDN连接建立过程中， 网络将 Relay-UE PGW地址和 SGW能力指示发送给 Mobile Relay。在 User-UE从 Mobile Relay接 入过程中， Mobile Relay将 Relay-UE PGW地址信息和 SGW能力指示发送给 User-UE MME, 辅助 User-UE MME为 User-UE进行 User-UE SGW选择。
Mobile Relay附着到网络过程中，或者 Mobile Relay发起 PDN连接建立过程中， Mobile Relay从 Relay-UE MME获得 Relay-UE PGW地址信息和 SGW能力指示过程如图 7A所示： 步骤 1. Mobile Relay建立与 DeNB的无线资源控制（ RRC )信令连接。 RRC信令连接 的建立细节可以参见 3GPP TS 36.331 , 这里不进行详细介绍。
步骤 2. 对于 Mobile Relay发起的 Attach过程， 通过步骤 1建立好的 RRC信令连接，
Mobile Relay将 Attach Request消息发送给 DeNB, DeNB将 Attach Request消息直接透传 给 Relay-UE MME。
步骤 2a. 对于 Mobile Relay 发起的 PDN 连接建立过程， Mobile relay 将 PDN Connectivity Request消息发送给 DeNB, DeNB将 PDN Connectivity Request消息透传给 Relay-UE MME。
其中 Attach过程和 PDN连接建立过程是两个独立的过程， 同时只会有一个过程进行， 两者不会同时发生。 也即， 仅会执行步骤 2和步骤 2a中的一个。
步骤 3. Relay-UE MME根据 Mobile Relay当前所在位置信息， 为 Mobile Relay选择 Relay-UE SGW和 Relay-UE PGW。 Relay-UE MME在为 Mobile Relay选择 Relay-UE PGW 时选择一个同时支持 PGW功能和 SGW功能的实体设备。
步骤 4. Relay-UE MME 向该 Relay-UE SGW 发送会话创建请求 （ Creat Session Request );
步骤 4a. Relay-UE SGW将 Creat Session Request发送给该 Relay-UE PGW;
步骤 5a. Relay-UE PGW为 Mobile Relay建立承载上下文后，向该 Relay-UE SGW返回 会话^ 'J建响应 ( Creat Session Response );
步骤 5. Relay-UE SGW将 Creat Session Response发送给 Relay-UE MME;
步骤 6. 对于 Mobile Relay发起的 Attach过程， Relay-UE MME通过 Attach Accept消 息， 将为 Mobile Relay选择的 Relay-UE PGW地址信息和 SGW能力指示发送给 Mobile Relay;
步骤 6a.对于 Mobile Relay发起的 PDN连接建立过程， Relay-UE MME通过 ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST消息， 将为 Mobile Relay选择的 Relay-UE PGW地址信息和 SGW能力指示发送给 Mobile Relay。
步骤 6和步骤 6a也仅会执行其中的一个。
Mobile Relay将 Relay-UE PGW地址信息和 SGW 能力指示通过上行 S1接口建立 /S1 接口更新消息发送给 User-UE MME,对于从 Mobile Relay初始接入的 UE或者通过切换到 Mobile Relay小区的 UE, User-UE MME根据 Mobile Relay发起的 SI接口建立 /SI接口更 新过程中收到的 Relay-UE PGW地址信息和 SGW 能力指示为上述 UE选择 SGW,具体过 程如图 7B所示。
步骤 0. 在 Mobile Relay发起的 SI接口建立 /更新过程中，如果 Relay-UE PGW同时支 持 SGW功能， Mobile Relay将之前获得的 Relay-UE PGW地址和 SGW能力指示信息发送 给 User-UE MME。
步骤 1. 在 UE发起的初始接入过程或者 UE切入 Mobile Relay小区过程中， UE发起 向 Mobile Relay的接入过程。
步骤 2. Mobile Relay向 User-UE MME发送 UE相关上行 S 1 AP消息， 以通知 User-UE MME: UE当前已经从 Mobile Relay接入到网络。
步骤 3. User-UE MME根据步骤 0中从 Mobile Relay接收并本地保存的 Relay-UE PGW 地址信息和 SGW能力指示， 判断出 Relay-UE PGW支持 SGW功能， 则 User-UE MME选 择 Relay-UE PGW同时作为 User-UE SGW, 并将 Relay-UE PGW地址信息作为 User-UE SGW的地址信息。
步骤 4. User-UE MME根据步骤 3获得的 User-UE SGW的地址信息，向 User-UE SGW 发起会话建立请求。
步骤 5.如果 User-UE SGW可以为 UE提供服务， 则 User-UE SGW向 User-UE MME 返回会话建立响应消息， 以通知 User-UE MME会话建立完成。
除通过上行 S 1接口建立 /S1接口更新消息方式外， Mobile Relay也可以将 Relay-UE PGW地址和 SGW 能力指示信息通过 UE相关上行 S 1AP消息发送给 User-UE MME, 对 于从 Mobile Relay初始接入的 UE或者通过切换到 Mobile Relay小区的 UE, MME根据收 到的 UE相关上行 S 1 AP消息中的 Relay-UE PGW地址和 SGW 能力指示信息，为 UE相关 上行 S 1AP消息中涉及的 UE进行 SGW选择， 具体过程如图 7C所示：
步骤 1. 在 UE发起的初始接入过程或者 UE切入 Mobile Relay小区过程中， UE发起 向 Mobile Relay的接入过程。
步骤 2. Mobile Relay向 User-UE MME发送 UE相关上行 S 1 AP消息， 以通知 User-UE MME: UE当前已经从 Mobile Relay接入到网络。 这里， Mobile Relay需要将之前获得的 Relay-UE PGW地址和 SGW 能力指示信息携带在 UE 相关上行 S 1AP 消息中发送给 User-UE MME。
步骤 3. User-UE MME根据步骤 2中获得的 Relay-UE PGW对 SGW功能支持的能力指 示信息， 判断出 Relay-UE PGW支持 SGW功能， 则 User-UE MME选择 Relay-UE PGW同 时作为 User-UE SGW, 并将 Relay-UE PGW地址信息作为 User-UE SGW的地址信息。
步骤 4. User-UE MME根据步骤 3获得的 User-UE SGW的地址信息，向 User-UE SGW 发起会话建立请求。
步骤 5.如果 User-UE SGW可以为 UE提供服务， 则 User-UE SGW向 User-UE MME 返回会话建立响应消息， 以通知 User-UE MME会话建立完成。
实施例 2中， 网络为 Mobile Relay预配置 Relay-UE PGW, 一方面在 Mobile Relay附 着到网络过程中，根据 Mobile Relay的签约信息，网络为 Mobile Relay选择固定的 Relay-UE PGW。 另一方面在在 Mobile Relay启动过程中， 网管系统将为 Mobile Relay固定配置的 Relay-UE PGW地址和 SGW能力指示信息发送给 Mobile Relay。当 User-UE从 Mobile Relay 接入过程中， Mobile Relay将 Relay-UE PGW信息发送给 User-UE MME , 以辅助 User-UE MME为 User-UE进行网关选择。
Mobile Relay附着到网络过程中， 或者 Mobile Relay发起 PDN连接建立过程中， 根 据 HSS 中的签约数据信息或者 Relay-UE MME本地保存的 Mobile Relay PGW信息， Relay-UE MME为 Mobile Relay选择 Relay-UE PGW, 由于 Relay-UE PGW是预配置的， 因此可以保证 Relay-UE PGW同时支持 SGW功能， 具体过程如图 7D所示：
步骤 0. 运营商将为 Mobile Relay固定配置的 Relay-UE PGW标识和地址信息配置到 Relay-UE MME或配置到 HSS保存的签约数据中。 配置的 Relay-UE PGW同时支持 PGW 和 SGW功能。
步骤 1. Mobile Relay建立与 DeNB的 RRC信令连接。 RRC信令连接的建立细节可以 参见 3GPP TS 36.331 , 这里不进行详细介绍。
步骤 2. 对于 Mobile Relay发起的 Attach过程， 通过步骤 1建立好的 RRC信令连接， Mobile Relay将 Attach Request消息发送给 DeNB, DeNB将 Attach Request消息直接透传 给 Relay-UE MME。
步骤 2a. 对于 Mobile Relay 发起的 PDN 连接建立过程， Mobile Relay 将 PDN connectivity request 消息发送给 DeNB , DeNB 将 PDN connectivity request 消息透传给 Relay-UE MME。
步骤 3. Relay-UE MME根据 HSS中保存的签约信息或者 Relay-UE MME本地保存的 Mobile Relay PGW标识或地址信息， 为 Mobile Relay选择 Relay-UE PGW。
步骤 4. Relay-UE MME 向该 Relay-UE SGW 发送会话创建请求 （ Creat Session Request );
步骤 4a. Relay-UE SGW将 Creat Session Request发送给该 Relay-UE PGW;
步骤 5a. Relay-UE PGW为 Mobile Relay建立承载上下文后，向该 Relay-UE SGW返回 会话^ 'J建响应 ( Creat Session Response );
步骤 5. Relay-UE SGW将 Creat Session Response发送给 Relay-UE MME;
步骤 6. 对于 Mobile Relay发起的 Attach过程， Relay-UE MME向 Mobile Relay返回 Attach Accept消息；
步骤 6a.对于 Mobile Relay发起的 PDN连接建立过程， Relay-UE MME向 Mobile Relay 返回 ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST消息。
步骤 6和步骤 6a也仅会执行其中的一个。 Mobile Relay作为基站进入工作状态前， Mobile Relay首先发起向 OAM的连接过程， 并向 OAM请求配置信息。 OAM根据 Mobile Relay 的标识（ID )将运营商提前准备好的 配置信息发送给 Mobile Relay, 配置信息中包括 Relay-UE PGW 的标识、地址信息和 SGW 能力指示信息， 具体过程如图 7E所示：
步骤 1. Mobile Relay发起向 OAM的连接过程， 并向 0 AM请求配置信息， 在配置信 息请求消息中携带 Mobile Relay ID信息。
步骤 2. OAM根据 Mobile Relay ID将运营商提前准备好的配置信息发送给 Mobile Relay,配置信息中包括 Relay-UE PGW 的 ID和地址信息、 SGW能力指示和 User-UE MME 地址信息。 Mobile Relay本地保存 Relay-UE PGW的 ID 和地址信息、 SGW能力指示和 User-UE MME地址信息。
步骤 3. Mobile Relay根据步骤 2中获得的配置信息， 向 User-UE MME发起 S I连接建 立过程， 建立与 User-UE MME之间的 S 1 -MME接口。
需要特别说明的是， OAM中保存的 Relay-UE PGW的 ID和地址信息与 Relay-UE MME 本地保存的或 HSS的签约数据中固定配置的 Relay-UE PGW标识和地址信息一致。
Mobile Relay将 Relay-UE PGW地址和 SGW 能力指示信息通过上行 S 1接口建立 /S 1 接口更新消息发送给 User-UE MME,对于从 Mobile Relay初始接入的 UE或者通过切换到 Mobile Relay小区的 UE, User-UE MME根据 Mobile Relay发起的 S I接口建立 /S I接口更 新过程中收到的 Relay-UE PGW地址和 SGW 能力指示为上述 UE选择 SGW,具体过程如 图 7B所示。
除通过上行 S 1接口建立 /S1接口更新消息方式外， Mobile Relay也可以将 Relay-UE PGW地址和 SGW 能力指示信息通过 UE相关上行 S 1AP消息发送给 User-UE MME, 对 于从 Mobile Relay初始接入的 UE或者通过切换到 Mobile Relay小区的 UE, MME根据收 到的 UE相关上行 S 1 AP消息中的 Relay-UE PGW地址和 SGW 能力指示信息，为 UE相关 上行 S 1AP消息中涉及的 UE进行 SGW选择， 具体过程如图 7C所示。
参见图 8A, 本发明实施例还提供一种无线通信系统， 该系统包括：
Relay-UE MME801 , 接收 Mobile Relay发送的附着请求或 PDN连接请求， 确定同时 支持 PGW功能和 SGW功能的实体设备，并选择该实体设备作为该 Mobile Relay的 PGW; 将该 PGW的信息和 SGW能力指示信息， 发送给 Mobile Relay; 该 SGW能力指示信息用 于指示该 PGW支持 SGW功能；
Mobile Relay802 , 用于将接收到的 Relay-UE MME发送的 PGW的信息和 SGW能力 指示信息， 发送给 User-UE MME;
User-UE MME803 ,用于接收 Mobile Relay发送的 PGW的信息和 SGW能力指示信息； 保存该 PGW的地址信息以及 SGW能力指示信息与 Mobile Relay的关联关系；根据该关联 关系确定 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay的终端的 SGW。 参见图 8B, 本发明实施例还提供一种无线通信系统， 该系统包括：
Relay-UE MME811 , 用于接收 Mobile Relay发送的附着请求或 PDN连接请求， 确定 同时支持 PGW功能和 SGW功能的实体设备， 并选择该实体设备作为该 Mobile Relay的
PGW;
OAM812, 用于接收 Mobile Relay发送的配置信息请求消息； 将该 Mobile Relay的配 置信息发送给 Mobile Relay,该配置信息中包括为 Mobile Relay配置的 PGW的信息和 SGW 能力指示信息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备 , 并且该 PGW与 Relay-UE MME为该 Mobile Relay选择的 PGW相同； 该 SGW能力指示信息用于指示该 PGW支持 SGW功能；
Mobile Relay813 , 用于将接收到的 OAM发送的 PGW的信息和 SGW能力指示信息， 发送给 User-UE MME;
User-UE MME814,用于接收 Mobile Relay发送的 PGW的信息和 SGW能力指示信息； 保存该 PGW的地址信息以及 SGW能力指示信息与 Mobile Relay的关联关系；根据该关联 关系确定 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay的终端的 SGW。
参见图 9, 本发明实施例还提供一种 Relay-UE MME, 该 Relay-UE MME包括： 接收单元 90 , 用于接收 Mobile Relay发送的附着请求或 PDN连接请求；
选择单元 91 , 用于确定同时支持 PGW功能和 SGW功能的实体设备， 并选择该实体 设备作为该 Mobile Relay的 PGW。
所述选择单元 91用于：
从本地或 Mobile Relay的签约信息中获取为 Mobile Relay预先配置的 PGW的信息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备； 并选择该 PGW作为该 Mobile Relay的 PGW。
所述选择单元 91用于：
通过查询域名服务系统 DNS , 获得 SGW查询结果列表和 PGW结果列表； 确定同时 出现在该 SGW查询结果列表和 PGW结果列表中的设备标识 ,将该设备标识对应的网关设 备确定为同时支持 PGW功能和 SGW功能的实体设备。
该 Relay-UE MME还包括：
指示单元 92, 用于将 PGW的信息和 SGW能力指示信息， 发送给 Mobile Relay; 该 SGW能力指示信息用于指示 PGW支持 SGW功能。
所述指示单元 92用于：
若接收单元接收到 Mobile Relay发出的附着请求，则通过附着接受 Attach Accept消息， 将 PGW的信息和 SGW能力指示信息发送给 Mobile Relay; 若接收单元接收到 Mobile Relay发出的 PDN连接请求，则通过激活默认演进分组系统 承载上下文请求（ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST ) 消息， 将 PGW的信息和 SGW能力指示信息发送给 Mobile Relay。
所述选择单元 91还用于：
在选择同时支持 PGW功能和 SGW功能的实体设备作为该 Mobile Relay的 PGW时， 还为该 Mobile Relay选择 SGW;
该 Relay-UE MME还包括：
上下文建立单元 93 , 用于在选择单元为 Mobile Relay选择 PGW和 SGW之后 , 触发
SGW和 PGW为 Mobile Relay建立承载上下文。
参见图 10, 本发明实施例还提供一种 0 AM, 该 OAM包括：
接收单元 101 , 用于接收 Mobile Relay发送的配置信息请求消息；
指示单元 102,用于将 Mobile Relay的配置信息发送给 Mobile Relay,该配置信息中包 括为 Mobile Relay配置的分组数据网关 PGW的信息和服务网关 SGW能力指示信息， 该
PGW为同时支持 PGW功能和 SGW功能的实体设备， 该 SGW能力指示信息用于指示该
PGW支持 SGW功能。
仍参见图 10, 本发明实施例还提供一种 Mobile Relay, 该 Mobile Relay包括： 接收单元 101 ,用于接收 Relay-UE MME或 OAM发送的该 Mobile Relay的 PGW的信 息和 SGW能力指示信息， 该 SGW能力指示信息用于指示该 PGW支持 SGW功能； 指示单元 102, 用于将 PGW的信息和 SGW能力指示信息， 发送给 User-UE MME。 所述指示单元 102用于：
在发起的 S1接口建立过程或 S1接口更新过程中， 将 PGW的信息和 SGW能力指示 信息发送给 User-UE MME; 或者，
在接收到终端发送的接入请求后，通过终端相关上行 S 1接口应用 S 1 AP消息，将 PGW 的信息和 SGW能力指示信息发送给 User-UE MME。
所述指示单元 102还用于：
在发起的 S1接口建立过程或 S1接口更新过程中， 将 PGW的信息和 SGW能力指示 信息发送给 User-UE MME之后，接收终端发送的接入请求， 向 User-UE MME发送终端相 关上行 S 1 AP消息， 以通知 User-UE MME该终端已通过该 Mobile Relay接入网络。
参见图 11 , 本发明实施例还提供一种 User-UE MME, 该 User-UE MME包括： 接收单元 111 ,用于接收 Mobile Relay发送的该 Mobile Relay的分组数据网关 PGW的 信息和服务网关 SGW能力指示信息， 该 SGW能力指示信息用于指示该 PGW支持 SGW 功能； 保存该 PGW的地址信息以及 SGW能力指示信息与 Mobile Relay的关联关系； 选择单元 112, 用于根据关联关系确定 PGW支持 SGW功能， 并选择该 PGW作为接 入该 Mobile Relay的终端的 SGW。
所述接收单元 111用于： 在 Mobile Relay发起的 SI接口建立过程或 S1接口更新过程 中，接收到 PGW的信息和 SGW能力指示信息； 选择单元 112用于： 在后续接收到 Mobile Relay发送的终端相关上行 S 1接口应用 S 1 AP消息后，根据关联关系确定 PGW支持 SGW 功能， 并选择该 PGW作为接入该 Mobile Relay的终端的 SGW; 或者，
所述接收单元 111用于：通过 Mobile Relay发送的终端相关上行 S 1 AP消息，接收 PGW 的信息和 SGW能力指示信息； 选择单元 112用于： 在接收到该终端相关上行 S1AP消息 后， 根据关联关系确定 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay的 终端的 SGW。
该 User-UE MME还包括：
会话建立单元 113 , 用于将 PGW的地址信息作为接入该 Mobile Relay的终端的 SGW 的地址信息， 并根据该地址信息向该 SGW发送会话建立请求。
综上， 本发明的有益效果包括：
本发明实施例提供的方案中， Relay-UE MME在 Mobile Relay发起的网络附着或 PDN 连接建立过程中， 选择同时支持 PGW功能和 SGW功能的实体设备作为该 Mobile Relay 的 PGW; 由 Relay-UE MME将该 PGW的信息和 SGW能力指示信息发送给 Mobile Relay, 或者， 由 OAM在接收到 Mobile Relay发送的配置信息请求消息后， 将包括 PGW的信息 和 SGW能力指示信息的配置信息发送给 Mobile Relay; 然后， Mobile Relay将该 PGW的 地址信息和 SGW能力指示信息发送给 User-UE MME; User-UE MME根据接收到的信息 确定该 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay的终端的 SGW。 可见，本发明中，网络侧为 Mobile Relay选择的 PGW(即 Relay-UE PGW )和为 Mobile Relay 下的 UE选择的 SGW (即 User-UE SGW ), 位于同一实体设备， 那么， 在该 UE的下行数 据路由路径： User-UE PGW-> User-UE SGW-> Relay-UE PGW-> Relay-UE SGW-> Donor e B-> Mobile Relay -> User-UE中， User-UE SGW到 Relay-UE PGW的传输距离几乎为零， 使得 UE的下行数据路由路径的优化性得到了保证， 因为下行数据的路由路径会随 Mobile Relay的移动而发生改变， 但是在 Mobile Relay的移动过程中 Relay-UE PGW是始终固定 的， 因此下行数据路由路径是否优化完全取决于 Relay-UE PGW与 User-UE SGW之间的 传输路径是否是优化的， 在 Relay-UE PGW与 User-UE SGW之间的传输距离几乎为零的 情况下， 能够保证 Relay-UE PGW与 User-UE SGW之间的传输路径的优化性， 进而使得 整个下行数据路由路径的优化性能够得到保证。
本发明保证了引入 Mobile Relay后， Mobile Relay下的 UE的数据路由的优化性， 一 方面有利于节省网络侧传输资源， 另一方满有利于减小 UE的数据传输时延。
本领域内的技术人员应明白， 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此， 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且， 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 （包括但不限于磁盘存储器和光学存储器等）上实施的计算机程序产品的形 式。
本发明是参照根据本发明实施例的方法、 设备（系统）、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器， 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中， 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品， 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上， 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理， 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
显然， 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种网关选择方法， 其特征在于， 该方法包括：
中继终端移动性管理实体 Relay-UE MME接收移动中继设备 Mobile Relay发送的附着 请求或分组数据网络 PDN连接请求；
所述 Relay-UE MME确定同时支持分组数据网关 PGW功能和服务网关 SGW功能的 实体设备， 并选择该实体设备作为该 Mobile Relay的 PGW。
2、 如权利要求 1所述的方法， 其特征在于， 所述 Relay-UE MME确定同时支持 PGW 功能和 SGW功能的实体设备， 具体包括：
所述 Relay-UE MME从本地或所述 Mobile Relay 的签约信息中获取为所述 Mobile Relay预先配置的 PGW的信息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备； 并选择该 PGW作为该 Mobile Relay的 PGW。
3、 如权利要求 1所述的方法， 其特征在于， 所述 Relay-UE MME确定同时支持 PGW 功能和 SGW功能的实体设备， 具体包括：
所述 Relay-UE MME通过查询域名服务系统 DNS, 获得 SGW查询结果列表和 PGW 结果列表；确定同时出现在该 SGW查询结果列表和 PGW结果列表中的设备标识，将该设 备标识对应的网关设备确定为同时支持 PGW功能和 SGW功能的实体设备。
4、 如权利要求 3 所述的方法， 其特征在于， 在选择该实体设备作为该 Mobile Relay 的 PGW之后， 进一步包括：
所述 Relay-UE MME将所述 PGW的信息和 SGW能力指示信息， 发送给所述 Mobile Relay; 所述 SGW能力指示信息用于指示所述 PGW支持 SGW功能。
5、 如权利要求 4所述的方法， 其特征在于， 所述 Relay-UE MME将所述 PGW的信息 和 SGW能力指示信息， 发送给所述 Mobile Relay, 具体包括：
若所述 Relay-UE MME接收到所述 Mobile Relay发出的附着请求， 则所述 Relay-UE MME通过附着接受 Attach Accept消息，将所述 PGW的信息和 SGW能力指示信息发送给 所述 Mobile Relay;
若所述 Relay-UE MME接收到所述 Mobile Relay发出的 PDN 连接请求， 则所述 Relay-UE MME 通过激活默认演进分组系统承载上下文请求 ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST消息，将所述 PGW的信息和 SGW能力指示信息发送给所 述 Mobile Relay。
6、如权利要求 1-5中任一所述的方法， 其特征在于， 在所述 Relay-UE MME选择同时 支持 PGW功能和 SGW功能的实体设备作为该 Mobile Relay的 PGW时， 进一步包括： 所 述 Relay-UE MME为该 Mobile Relay选择 SGW; 以及，
在所述 Relay-UE MME为所述 Mobile Relay选择 PGW和 SGW后， 进一步包括： 所述 Relay-UE MME触发所述 SGW和所述 PGW为所述 Mobile Relay建立承载上下 文。
7、 一种信息指示方法， 其特征在于， 该方法包括：
操作与维护系统 OAM接收移动中继设备 Mobile Relay发送的配置信息请求消息； 所述 OAM将所述 Mobile Relay的配置信息发送给所述 Mobile Relay , 该配置信息中 包括为所述 Mobile Relay配置的分组数据网关 PGW的信息和服务网关 SGW能力指示信 息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备 , 该 SGW能力指示信息用于 指示该 PGW支持 SGW功能。
8、 一种信息指示方法， 其特征在于， 该方法包括：
移动中继设备 Mobile Relay接收中继终端移动性管理实体 Relay-UE MME或操作与维 护系统 OAM发送的该 Mobile Relay的分组数据网关 PGW的信息和服务网关 SGW能力指 示信息， 该 SGW能力指示信息用于指示该 PGW支持 SGW功能；
所述 Mobile Relay将所述 PGW的信息和 SGW能力指示信息，发送给用户终端移动性 管理实体 User-UE MME。
9、 如权利要求 8所述的方法， 其特征在于， 所述 Mobile Relay将所述 PGW的信息和 SGW能力指示信息， 发送给 User-UE MME, 具体包括：
所述 Mobile Relay在发起的 S1接口建立过程或 S1接口更新过程中， 将所述 PGW的 信息和 SGW能力指示信息发送给 User-UE MME; 或者，
所述 Mobile Relay在接收到终端发送的接入请求后， 通过终端相关上行 S1接口应用 S1AP消息， 将所述 PGW的信息和 SGW能力指示信息发送给 User-UE MME。
10、 如权利要求 9所述的方法， 其特征在于， 所述 Mobile Relay在发起的 S1接口建 立过程或 S1接口更新过程中， 将所述 PGW的信息和 SGW能力指示信息发送给 User-UE MME之后， 进一步包括：
所述 Mobile Relay接收终端发送的接入请求；
所述 Mobile Relay向所述 User-UE MME发送终端相关上行 S 1 AP消息， 以通知所述 User-UE MME该终端已通过该 Mobile Relay接入网络。
11、 一种网关选择方法， 其特征在于， 该方法包括：
用户终端移动性管理实体 User-UE MME接收移动中继设备 Mobile Relay发送的该 Mobile Relay的分组数据网关 PGW的信息和服务网关 SGW能力指示信息， 该 SGW能力 指示信息用于指示该 PGW支持 SGW功能； 保存该 PGW的地址信息以及 SGW能力指示 信息与所述 Mobile Relay的关联关系；
所述 User-UE MME根据所述关联关系确定所述 PGW支持 SGW功能，并选择该 PGW 作为接入该 Mobile Relay的终端的 SGW。
12、如权利要求 11所述的方法，其特征在于，所述 User-UE MME在所述 Mobile Relay 发起的 SI接口建立过程或 S1接口更新过程中， 接收到所述 PGW的信息和 SGW能力指 示信息； 所述 User-UE MME在后续接收到所述 Mobile Relay发送的终端相关上行 S1接口 应用 S1AP消息后， 根据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作 为接入该 Mobile Relay的终端的 SGW; 或者，
所述 User-UE MME通过所述 Mobile Relay发送的终端相关上行 SI AP消息， 接收所 述 PGW的信息和 SGW能力指示信息；所述 User-UE MME在接收到该终端相关上行 S1AP 消息后， 根据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay的终端的 SGW。
13、如权利要求 11或 12所述的方法，其特征在于，在选择该 PGW作为接入该 Mobile Relay的终端的 SGW之后， 进一步包括：
所述 User-UE MME将所述 PGW的地址信息作为接入该 Mobile Relay的终端的 SGW 的地址信息， 并根据该地址信息向该 SGW发送会话建立请求。
14、 一种中继终端移动性管理实体 Relay-UE MME, 其特征在于， 该 Relay-UE MME 包括：
接收单元，用于接收移动中继设备 Mobile Relay发送的附着请求或分组数据网络 PDN 连接请求；
选择单元，用于确定同时支持分组数据网关 PGW功能和服务网关 SGW功能的实体设 备， 并选择该实体设备作为该 Mobile Relay的 PGW。
15、 如权利要求 14所述的 Relay-UE MME, 其特征在于， 所述选择单元用于： 从本地或所述 Mobile Relay的签约信息中获取为所述 Mobile Relay预先配置的 PGW 的信息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备； 并选择该 PGW作为该 Mobile Relay的 PGW。
16、 如权利要求 14所述的 Relay-UE MME, 其特征在于， 所述选择单元用于： 通过查询域名服务系统 DNS , 获得 SGW查询结果列表和 PGW结果列表； 确定同时 出现在该 SGW查询结果列表和 PGW结果列表中的设备标识 ,将该设备标识对应的网关设 备确定为同时支持 PGW功能和 SGW功能的实体设备。
17、 如权利要求 16所述的 Relay-UE MME, 其特征在于， 该 Relay-UE MME还包括： 指示单元，用于将所述 PGW的信息和 SGW能力指示信息，发送给所述 Mobile Relay; 所述 SGW能力指示信息用于指示所述 PGW支持 SGW功能。
18、 如权利要求 17所述的 Relay-UE MME, 其特征在于， 所述指示单元用于： 若所述接收单元接收到所述 Mobile Relay发出的附着请求， 则通过附着接受 Attach
Accept消息， 将所述 PGW的信息和 SGW能力指示信息发送给所述 Mobile Relay; 若所述接收单元接收到所述 Mobile Relay发出的 PDN连接请求，则通过激活默认演进 分组系统承载上下文请求 ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST消息， 将所述 PGW的信息和 SGW能力指示信息发送给所述 Mobile Relay„
19、 如权利要求 14-18中所述任一的 Relay-UE MME, 其特征在于， 所述选择单元还 用于：
在选择同时支持 PGW功能和 SGW功能的实体设备作为该 Mobile Relay的 PGW时， 还为该 Mobile Relay选择 SGW;
该 Relay-UE MME还包括：
上下文建立单元， 用于在所述选择单元为所述 Mobile Relay选择 PGW和 SGW之后， 触发所述 SGW和所述 PGW为所述 Mobile Relay建立承载上下文。
20、 一种操作与维护系统 OAM, 其特征在于， 该 OAM包括：
接收单元， 用于接收移动中继设备 Mobile Relay发送的配置信息请求消息； 指示单元， 用于将所述 Mobile Relay的配置信息发送给所述 Mobile Relay, 该配置信 息中包括为所述 Mobile Relay配置的分组数据网关 PGW的信息和服务网关 SGW能力指示 信息， 该 PGW为同时支持 PGW功能和 SGW功能的实体设备 , 该 SGW能力指示信息用 于指示该 PGW支持 SGW功能。
21、 一种移动中继设备 Mobile Relay, 其特征在于， 该 Mobile Relay包括：
接收单元，用于接收中继终端移动性管理实体 Relay-UE MME或操作与维护系统 OAM 发送的该 Mobile Relay的分组数据网关 PGW的信息和服务网关 SGW能力指示信息， 该 SGW能力指示信息用于指示该 PGW支持 SGW功能；
指示单元，用于将所述 PGW的信息和 SGW能力指示信息，发送给用户终端移动性管 理实体 User-UE MME。
22、 如权利要求 21所述的 Mobile Relay, 其特征在于， 所述指示单元用于： 在发起的 S1接口建立过程或 S1接口更新过程中， 将所述 PGW的信息和 SGW能力 指示信息发送给 User-UE MME; 或者，
在接收到终端发送的接入请求后，通过终端相关上行 S1接口应用 S1AP消息，将所述 PGW的信息和 SGW能力指示信息发送给 User-UE MME。
23、 如权利要求 22所述的 Mobile Relay, 其特征在于， 所述指示单元还用于： 在发起的 S1接口建立过程或 S1接口更新过程中， 将所述 PGW的信息和 SGW能力 指示信息发送给 User-UE MME之后，接收终端发送的接入请求， 向所述 User-UE MME发 送终端相关上行 S 1 AP消息， 以通知所述 User-UE MME该终端已通过该 Mobile Relay接 入网络。
24、 一种用户终端移动性管理实体 User-UE MME, 其特征在于， 该 User-UE MME包 括：
接收单元， 用于接收移动中继设备 Mobile Relay发送的该 Mobile Relay的分组数据网 关 PGW的信息和服务网关 SGW能力指示信息， 该 SGW能力指示信息用于指示该 PGW 支持 SGW功能； 保存该 PGW的地址信息以及 SGW能力指示信息与所述 Mobile Relay的 关联关系；
选择单元， 用于根据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作 为接入该 Mobile Relay的终端的 SGW。
25、 如权利要求 24所述的 User-UE MME, 其特征在于， 所述接收单元用于： 在所述 Mobile Relay发起的 SI接口建立过程或 S1接口更新过程中， 接收到所述 PGW的信息和 SGW能力指示信息； 所述选择单元用于：在后续接收到所述 Mobile Relay发送的终端相关 上行 S1接口应用 S1AP消息后， 根据所述关联关系确定所述 PGW支持 SGW功能， 并选 择该 PGW作为接入该 Mobile Relay的终端的 SGW; 或者，
所述接收单元用于： 通过所述 Mobile Relay发送的终端相关上行 S1AP消息， 接收所 述 PGW的信息和 SGW能力指示信息；所述选择单元用于：在接收到该终端相关上行 S1AP 消息后， 根据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay的终端的 SGW。
26、 如权利要求 24或 25所述的 User-UE MME, 其特征在于， 该 User-UE MME还包 括：
会话建立单元， 用于将所述 PGW的地址信息作为接入该 Mobile Relay的终端的 SGW 的地址信息， 并根据该地址信息向该 SGW发送会话建立请求。
27、 一种无线通信系统， 其特征在于， 该系统包括：
中继终端移动性管理实体 Relay-UE MME, 用于接收移动中继设备 Mobile Relay发送 的附着请求或分组数据网络 PDN连接请求，确定同时支持分组数据网关 PGW功能和服务 网关 SGW功能的实体设备，并选择该实体设备作为该 Mobile Relay的 PGW;将所述 PGW 的信息和 SGW能力指示信息， 发送给所述 Mobile Relay; 所述 SGW能力指示信息用于指 示所述 PGW支持 SGW功能；
Mobile Relay, 用于将接收到的所述 Relay-UE MME发送的 PGW的信息和 SGW能力 指示信息， 发送给用户终端移动性管理实体 User-UE MME;
User-UE MME, 用于接收所述 Mobile Relay发送的 PGW的信息和 SGW能力指示信 息；保存该 PGW的地址信息以及 SGW能力指示信息与所述 Mobile Relay的关联关系；根 据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay 的终端的 SGW。
28、 一种无线通信系统， 其特征在于， 该系统包括： 中继终端移动性管理实体 Relay-UE MME, 用于接收移动中继设备 Mobile Relay发送 的附着请求或分组数据网络 PDN连接请求，确定同时支持分组数据网关 PGW功能和服务 网关 SGW功能的实体设备 , 并选择该实体设备作为该 Mobile Relay的 PGW;
操作与维护系统 OAM, 用于接收 Mobile Relay发送的配置信息请求消息； 将所述 Mobile Relay的配置信息发送给所述 Mobile Relay, 该配置信息中包括为所述 Mobile Relay 配置的 PGW的信息和 SGW能力指示信息， 该 PGW为同时支持 PGW功能和 SGW功能 的实体设备， 并且该 PGW与所述 Relay-UE MME为该 Mobile Relay选择的 PGW相同； 该 SGW能力指示信息用于指示该 PGW支持 SGW功能；
Mobile Relay,用于将接收到的所述 OAM发送的 PGW的信息和 SGW能力指示信息， 发送给用户终端移动性管理实体 User-UE MME;
User-UE MME, 用于接收所述 Mobile Relay发送的 PGW的信息和 SGW能力指示信 息；保存该 PGW的地址信息以及 SGW能力指示信息与所述 Mobile Relay的关联关系；根 据所述关联关系确定所述 PGW支持 SGW功能， 并选择该 PGW作为接入该 Mobile Relay 的终端的 SGW。
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