WO2011097814A1

WO2011097814A1 - Message routing method, service gateway and communication system thereof

Info

Publication number: WO2011097814A1
Application number: PCT/CN2010/070667
Authority: WO
Inventors: 戚彩霞; 王宁沈; 朱奋勤
Original assignee: 华为技术有限公司
Priority date: 2010-02-11
Filing date: 2010-02-11
Publication date: 2011-08-18
Also published as: CN102449960B; CN102449960A

Abstract

The embodiments of the present invention provide a message routing method, service gateway and communication system thereof. The message routing method includes the following steps: a bearer-change request message sent by a mobility management network element is received; a packet data gateway identifier and location information of a user device is included in the bearer-change request message; the location information of the user device is sent to the packet data gateway corresponding to the packet data gateway identifier.

Description

Message routing method, monthly service gateway and communication system

Technical field

The present invention relates to the field of communications, and in particular, to a message routing method, a service gateway, and a communication system. Background technique

In a network of System Architective Evolution (SAE), a Mobility Management Entity (MME) or a Serving General Packet Radio Service Support Node (SGSN) is a mobile management network element. Responsible for non-access service (NAS) signaling encryption, tracking, user temporary identity assignment, and security. The Serving Gateway (SGW) is responsible for the local mobility anchor and the mobility anchor inside the 3GPP system and the lawful interception related information; the Packet Data Network Gateway (PGW) is responsible for the policy execution and calculation of the data gateway. Fees and lawful interception related functions. The policy decision entity may be a Policy & Charging Rule Function (PCRF) for management of service quality and charging related policy decision control rules. A general packet radio service tunneling protocol (GTP) protocol is used for signaling interaction between the mobility management network element and the SGW, and a general packet radio service tunneling protocol (GTP) is used between the SGW and the PGW. Or proxy mobile IP (PMX) protocol for signaling interaction. Under certain conditions, such as location-based charging, the PGW needs to obtain location information of the user equipment (UE), and the PGW may send indication information to the mobility management network element through the SGW, instructing the mobility management network element to report the UE. After receiving the indication information, the mobility management network element sends the location information of the UE to the SGW, and the SGW forwards the location information of the UE to the corresponding PGW. When the serving gateway has a connection relationship with multiple PGWs at the same time, if only a part of the PGW requests the location information of the UE, the SGW cannot send the location information of the UE sent by the MME to the corresponding PGW. Summary of the invention

In view of this, the embodiment of the present invention provides a message routing method, a service gateway, and a communication system, and the SGW can send the received location information of the UE to the PGW requesting the location information.

A method for message routing, comprising: receiving a modify bearer request message sent by a mobility management network element, where the modify bearer request message includes an identifier of a packet data gateway and location information of the user equipment; sending location information of the user equipment A packet data gateway corresponding to the identity of the packet data gateway. A service gateway, comprising: a receiving unit, configured to receive a modify bearer request message sent by a mobility management network element, where the modify bearer request message includes an identifier of a packet data gateway and location information of the user equipment; Sending the location information of the user equipment received by the receiving unit to

A communication system, comprising: a mobility management network element, configured to send a modify bearer request message to a serving gateway, where the modify bearer request message includes an identifier of a packet data gateway and location information of a user equipment; and a service gateway, configured to receive And a modify bearer request message sent by the mobility management network element, where the location information of the user equipment is sent to a packet data gateway corresponding to the packet data gateway identifier. DRAWINGS

FIG. 1 is a schematic structural diagram of a message routing method according to an embodiment of the present invention;

2 is a first schematic diagram of a message routing method according to an embodiment of the present invention;

FIG. 3 is a second schematic diagram of a message routing method according to an embodiment of the present disclosure;

4a is a third schematic diagram of a message routing method according to an embodiment of the present invention;

FIG. 4b is a fourth schematic diagram of a message routing method according to an embodiment of the present invention;

FIG. 5 is a fifth schematic diagram of a message routing method according to an embodiment of the present invention;

FIG. 5b is a sixth schematic diagram of a message routing method according to an embodiment of the present invention;

FIG. 6 is a structural diagram of a service gateway according to an embodiment of the present invention;

FIG. 7 is a first structural diagram of a communication system according to an embodiment of the present invention;

FIG. 8 is a second structural diagram of a communication system according to an embodiment of the present invention. detailed description

The message routing method, service gateway and communication system provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings. 1 is an architectural diagram of an embodiment of the present invention, in which a mobility management network element is responsible for functions such as NAS signaling, tracking, user temporary identity assignment, and security. The service gateway is responsible for the local mobility anchor and the mobility anchor inside the 3GPP system and the lawful interception related information; the packet data gateway is responsible for policy enforcement, charging, and lawful interception related functions. The policy decision entity is used for the management of policy quality control and charging related policy decision control rules. The GTP protocol is used for signaling interaction between the mobility management network element and the serving gateway, and the GTP or PMIP protocol is used for signaling interaction between the serving gateway and the packet data gateway. Referring to FIG. 2, an embodiment of the present invention provides a method for message routing, including: Step 102: Receive a modify bearer request message sent by a target mobility management network element, where the modify bearer request message includes an identifier of a packet data gateway. Location information of the user equipment; The identifier of the packet data gateway may include a Fully Qualified Tunnel Endpoint Identifier (F-TEID) of the packet data gateway, and the F-TEID of the packet data gateway may include an Internet Protocol (IP Protocol) of the packet data gateway. The IP address and/or the tunnel endpoint identifier, the identifier information of the packet data gateway may also include a default bearer identifier or a dedicated bearer identifier, where the default bearer identifier or the dedicated bearer identifier is the mobility management network element and the location information of the UE needs to be acquired. The PGW establishes a Packet Data Network (PDN) connection or a dedicated carrier time allocated by the mobility management network element. Before the mobile management network element sends the modify bearer request message, the mobility management network element further determines, according to the location report indication information sent by the packet data gateway, a packet data gateway that receives the location information of the user equipment, and the location information and location of the user equipment. The identification information of the determined packet data gateway is sent to the serving gateway.

At least one of context information, packet data network PDN connection context information, bearer context, and Packet Data Protocol (PDP) context information acquires location reporting indication information sent by the packet data gateway, and determines packet data for receiving location information of the user equipment. The gateway determines a packet data gateway that receives location information of the user equipment or

The mobility management network element receives the GTP message of the packet data gateway, obtains the location reporting indication information sent by the packet data gateway according to the GTP message, and determines a packet data gateway that receives the location information of the user equipment. The location reporting indication information indicates that the mobility management network element reports location information of the user equipment or indicates that the mobility management network element reports the changed location information of the user equipment when the location of the user equipment changes. The location information of the UE may be location information of the UE in the macro network, such as a Tracking Area Identity (TAI), a Routing Area Identity (RAI), and a Global Cell Identity (Cell Global Identifier, CGI ) , E-UTRAN Global Community Identity (E-UTRAN Cell Global Identifier, ECGI) or Service Area Identity (SAI), which may also be Closed Subscriber Group (CSG) information of the UE.

Step 104: Send location information of the user equipment to a packet data gateway corresponding to the identifier information of the packet data gateway.

After receiving the modify bearer request message sent by the target mobility management network element, the SGW sends the location information of the UE included in the modify bearer request message to the packet corresponding to the identifier of the packet data gateway included in the modify bearer request message. Data gateway.

When the identifier of the packet data gateway includes a fully qualified tunnel endpoint identifier F-TEID of the packet data gateway, determining, according to the F-TEID, a general packet radio service tunneling protocol GTP tunnel that sends the modified bearer request message, by using the F-TEID Determining a GTP tunnel to send location information of the user equipment to the packet data gateway;

Determining packet data network PDN connection context information according to the default bearer identifier or the dedicated bearer identifier, and obtaining, according to the PDN connection context information, when the identifier of the packet data gateway includes a default bearer identifier or a dedicated bearer identifier The F-TEID of the packet data gateway determines, according to the F-TEID, a GTP tunnel that sends the modify bearer request message, and sends the location information of the user equipment to the packet data gateway by using the determined GTP tunnel. ;

When the identifier of the packet data gateway includes at least one of an F-TEID, a default bearer identifier, and a dedicated bearer identifier of the packet data gateway, searching for corresponding PDN connection context information according to the identifier of the packet data gateway, and according to The session identifier in the PDN connection context information determines a session connection, and the modified bearer request message is sent to the policy decision entity PCRF through the determined session connection, so that the PCRF passes the location information of the UE by using the The determined session connection is sent to the packet data gateway. In the embodiment of the present invention, the mobility management network element may be a Mobility Management Entity (MME) or a general packet radio service monthly support node (Serving) General Packet Radio Service Support Node, SGSN). The message routing method provided by the embodiment of the present invention may receive the modify bearer request message sent by the target mobility management network element, and obtain the identifier of the PGW and the location information of the UE from the message, and send the location information of the UE to the PGW. The corresponding PGW is identified, and the location information of the UE is avoided from being sent to the PGW that does not need to cover the location information, which reduces the signaling overhead.

Embodiment 2: The embodiment of the present invention provides a method for message routing. The mobility management network element is described by using an MME as an example. The MME reports the location information of the UE according to the indication of the PGW, including: Referring to FIG. 3, Step 201 to Step 209: When the PGW needs to acquire the location information of the UE, the PGW sends the indication information to the MME, and the MME is required to report the location information of the UE. This part is described by taking the change of the SGW serving the UE in the TAU process as an example, including Step 201: The UE sends a Tracking Area Update (TAU) request message to the target MME.

In the process of TAU, if the MME of the serving UE changes, the changed MME is the target MME, and the MME before the change is the source MME. If the SGW connected to the MME also changes, the changed SGW becomes The target SGW, the pre-change SGW is referred to as the source SGW.

Step 202: The target MME obtains the context information of the UE from the source MME. If the MME serving the UE does not change during the TAU, the step may be omitted. Step 203: The target MME sends a setup session request message to the target SGW. Step 204: The target SGW sends a modify bearer request message to the PGW. Step 205: The PGW sends a modify bearer response message to the target SGW, and if the PGW needs the MME to report the location information of the UE, The modified bearer response message may carry the location reporting indication information, and request the MME to report the location information of the UE, where the location reporting indication information may also indicate that the MME reports the location information of the UE when the location of the UE changes. In the TAU process of the UE, the PGW sends the location reporting indication information to the MME through the signaling in the TAU process of the UE, so that the MME can know the location information of the UE that needs to be reported. Step 206: The target SGW sends a setup session response message to the target MME, where the setup session response message may include the location report indication information received in step 205.

Step 207: The target MME and the HSS perform a location update process. If the MME of the serving UE does not change, the step does not exist.

After receiving the session establishment response message, the target MME learns the location information of the UE to be reported according to the received indication information. Further, if the target MME is the first time to receive the indication information, the current location information of the UE may be directly reported to the PGW. If the indication information is not received for the first time, the target MME may occur at the location of the UE. After the transformation, the location information of the UE is reported. Step 208: The source MME deletes the session information on the source SGW. If the SGW of the serving UE does not change, the step does not exist.

Step 209: The target MME sends a TAU accept message to the UE. The embodiment of the present invention (refer to steps 201 to 209) is described by taking the TAU process as an example. For example, the PGW may also send the location reporting indication information to the MME through other processes, for example, in a Routing Area Update (RAU) process. If the SGW changes, the PGW may send the location reporting indication information to the SGW by modifying the bearer response message, and the SGW sends the location reporting indication information to the SGSN by using a Create Session Reaponse message; if in the TAU and RAU processes, the SGW The PGW can send the location report reporting indication information to the SGW by modifying the bearer request message, and the SGW sends the location reporting indication information to the MME by modifying the bearer request message. In the bearer establishment process, the PGW can establish a bearer request (Create Bearer Request). The message sends the location indication indication information to the SGW, and the SGW sends the location indication information to the MME by establishing a bearer request message, and the PGW may also send the location indication information to the SGW by changing the notification response (Change Notification Response) message, and the SGW changes by Notification response Gen information transmission instruction information to the MME position. Referring to FIG. 4a, step 301 308 is that the MME sends the location information of the UE to the corresponding PGW through the SGW. This part is described as an example in which the SGW does not change during the TAU process.

Step 301: The UE sends a TAU request message to the target MME.

Step 302: The target MME obtains the context information of the UE from the source MME, and the step is optional. If the MME does not change during the TAU, the step may be omitted.

In this step, the target MME may also obtain PDN connection context information or bearer context information or PDP context information from the source MME. Step 303: The target MME sends a modify bearer request message to the SGW.

If the source MME receives the location reporting indication information sent by the PGW, the source MME obtains the PGW that receives the location information of the UE according to the location reporting indication information sent by the PGW. For example, the identification information of the PGW and the corresponding relationship of the location information are saved. Includes:

1. If the identifier information of the PGW obtained by the source MME is the F-TEID information of the PGW, the source MME may save the correspondence between the location report indication information and the identifier of the PGW in the context information of the UE or the PDN connection context, where The F-TEID of the PGW is allocated by the PGW when a PDN connection is established between the source MME and the PGW.

2. If the identifier information of the PGW obtained by the source MME is the identifier of the default bearer between the source MME and the PGW, the source MME stores the correspondence between the default bearer identifier and the location report indication information in the context, PDN of the UE. In the connection context or bearer context, the default bearer identifier is allocated when a PDN connection is established between the source MME and the PGW.

3. If the identifier information of the PGW obtained by the source MME is the identifier of the dedicated bearer between the source MME and the PGW, the source MME stores the correspondence between the dedicated bearer identifier and the location report indication information in the context, PDN of the UE. In the connection context or bearer context, the private bearer identifier is allocated between the source MME and the PGW to establish a dedicated bearer. After the source MME obtains the PGW that receives the location information of the UE, the source MME may also include a field indicating the location information in the identifier information of the PGW to identify the location information of the UE that needs to be reported by the PGW. For example, add an extension bit in the logo of the PGW, or add a suffix, etc.

When the target MME acquires at least one of the context information, the bearer context information, the PDN connection context, and the PDP context of the UE from the source MME, the location indication indication information sent by the PGW is obtained, and the UE is required to acquire the UE according to the location indication information. The location information is reported, and the identification information of the PGW that receives the location information of the UE.

In the process of the TAU, the location of the UE is changed. The target MME reports the location information of the UE to the PGW through the SGW, and also sends the identifier information of the PGW to the SGW. The SGW sends the location information of the UE to the identifier of the PGW. The corresponding PGW of the information.

If the MME does not change during the process of the TAU, the MME directly obtains the identification information of the PGW that receives the location information of the UE according to the location reporting indication information sent by the PGW, and sends the location information of the UE and the identification information of the PGW to the SGW. .

The target MME is configured to report the location information of the UE, and the location information of the UE is sent to the SGW by using the modified bearer request message. Further, when the location of the UE changes, the target MME passes the location information of the UE by using the modified bearer request. The message is sent to the SGW.

In the embodiment of the present invention, the MME may obtain the location information of the UE by tracking the area update message, or may obtain the location information of the UE by subscribing to the eNodeB.

In this step, if the MME does not change during the process of the TAU, the source MME and the target MME are the same MME, and the target MME receives the location indication information sent by the PGW, and sends the modified bearer request to the SGW. The message carries the identification information of the PGW.

Step 304: The SGW sends a modify bearer request message to the PGW.

The SGW receives the modify bearer request message sent by the target MME, obtains the identifier information of the PGW and the location information of the UE in the modify bearer request message, and sends the location information of the UE to the The PGW's identification information corresponds to the PGW. If the PGW identifier is the default bearer identifier or the dedicated bearer identifier, the SGW finds the corresponding PDN connection context by using the default bearer identifier or the dedicated bearer identifier, and obtains the F-TEID information of the PGW stored in the PDN connection context, and The modified bearer request message is sent to the corresponding PGW by the GTP tunnel determined by the F-TEID identifier of the PGW, and the modified bearer request message includes the location information of the UE. If the PGW identifier is the PGW F-TEID, the SGW will modify the bearer request message. The GTP tunnel determined by the F-TEID identifier of the PGW is sent to the corresponding PGW, and the tampering request message includes the location information of the UE. In the GTP protocol, a GTP tunnel is used to forward signaling messages and service data packets. A GTP tunnel can be classified into a user plane tunnel and a control plane tunnel. The granularity of the GTP tunnel can be based on user equipment (UE), packet data network connection (PDN Connection), bearer context (Bearer Context), or PDP. Context (Packet Data Protocol Context, PDP Contxet)  The GTP-enabled network element can identify a GTP tunnel through the IP address, UDP port number, and tunnel endpoint identifier (TEID). The SGW and the PGW pass the GTP tunnel. The SGW can uniquely determine a PGW through a GTP tunnel. The F-TEID information of the PGW includes the IP address and/or the tunnel point identifier of the PGW. In the GTP protocol, the UDP port number sent by the request message is unique. Therefore, the SGW can uniquely determine a GTP tunnel according to the F-TEID of the PGW, and send the location information of the UE to the corresponding PGW through the determined GTP tunnel. Step 305: The PGW sends a modify bearer response message to the SGW. Step 306: The SGW sends a modify bearer response message to the target MME; Step 307: The target MME updates the location in the HSS Information, this step is optional, if the MME No change, this step is omitted;

Step 308: The target MME sends a TAU accept message to the UE. In the embodiment of the present invention, the GTP protocol is used between the SGW and the PGW as an example. Referring to FIG. 4b, if the PMGW is used for the signaling interaction between the SGW and the PGW, the steps 304 and 305 of the embodiment of the present invention are Step 304a: The SGW sends a Gateway Control and QoS Policy Rules Request Procedure to the PCRF, and the SGW sends a charging control request command to the PCRF;

The SGW searches for the corresponding PDN connection context according to the PGW identification information in the modify bearer request message sent by the MME, and obtains a session identifier (for example, a session ID) in the PDN connection context, and determines, according to the session identifier, the SGW and the PCRF to use the session connection. The location information of the UE is sent to the PCRF.

Step 304b: The PCRF receives the location information of the UE sent by the SGW, and obtains the session identifier used by the SGW. The PCRF sends a PCC Rules Provision Procedure to the PGW, and sends the session connection corresponding to the obtained session identifier to the PGW. The location information of the UE, and the PCRF sends a re-authentication request command to the PGW.

Step 305a: The PGW sends a re-authentication confirmation command to the PCRF to confirm the location information of the received user.

Step 305b: The PCRF sends a charging control confirmation command to the SGW to confirm the location information of the received user.

In the embodiment of the present invention, after the SGW receives the modify bearer request message that is sent by the MME and includes the location information of the UE, if the SGW and the PGW use the GTP protocol, the SGW obtains the identifier of the corresponding PGW according to the modified bearer request message, and receives the identifier. The obtained UE location information is sent to the corresponding data gateway through the GTP tunnel corresponding to the PGW identifier. If SGW and PGW use PMIP The protocol, the SGW obtains the session identifier in the PDN connection according to the modified bearer request message, and sends the obtained UE location information to the PCRF through the determined session connection, so that the PCRF is sent to the corresponding PGW. With the method provided by the embodiment of the present invention, the SGW can send the location information of the UE to the PGW requesting the MME to report the location information, and the SGW can prevent the SGW from transmitting the location information to all the PGWs, which can reduce the signaling expenditure.

Embodiment 3 Referring to FIG. 5a, an embodiment of the present invention provides a method for information routing. In the embodiment of the present invention, a mobility management network element is described by using an MME as an example. When the MME detects that the location information of the UE changes, The method includes: Step 501: The MME detects that the location information of the UE changes, and sends a modify bearer request message to the SGW.

The PGW may send the location report indication information to the MME. For details, refer to the description in steps 201-209.

After receiving the location reporting indication information sent by the PGW, the MME saves the location reporting indication information and the identifier of the PGW, as described in step 202.

The change of the location information of the UE may include that the TAI, RAI, CGI, ECGI, or SAI of the UE changes or the CSG information of the UE changes or the ECGI information of the UE changes; the MME may obtain the location of the UE by subscribing to the eNodeB. Whether the information has changed, when the MME detects that the location information of the UE changes, the MME sends a modify bearer request message to the SGW, where the modify bearer request message includes the identifier of the PGW and the changed location information of the UE.

Step 502: The SGW sends a modify bearer request message to the PGW, where the message carries the location information of the UE.

After receiving the modify bearer request message sent by the MME, the SGW determines, according to the PGW identifier in the modify bearer request message, the GTP tunnel that delivers the modify bearer request message, and the determined The GTP tunnel sends the modified bearer request message to the PGW, where the modified bearer request message includes the changed location information of the UE. Refer specifically to the description of step 304. Step 503: The PGW sends a modify bearer response message to the SGW. Step 504: The SGW sends a modify bearer response message to the MME. The embodiment of the present invention is described by using the GTP protocol of the SGW and the PGW as an example. Referring to FIG. 5b, if the PMGW is used for signaling interaction between the SGW and the PGW, the steps 502 and 503 are replaced by: Step 502a, The SGW sends a Gateway Control and QoS Policy Rules Request Procedure to the PCRF, and the SGW sends a charging control request command to the PCRF;

The SGW searches for the corresponding PDN connection context according to the PGW identification information in the modify bearer request message sent by the MME, and obtains a session identifier (for example, a session ID) in the PDN connection context, and determines, according to the session identifier, the SGW and the PCRF to use the session connection. The location information of the UE is sent to the PCRF. Step 502b: The PCRF receives the location information of the UE sent by the SGW, and obtains the session identifier used by the SGW. The PCRF sends a PCC Rules Provision Procedure to the PGW, and sends the session connection corresponding to the session identifier to the PGW. The location information of the UE, and the PCRF sends a re-authentication request command to the PGW. Step 503a: The PGW sends a re-authentication confirmation command to the PCRF to confirm the location information of the received user.

Step 503b: The PCRF sends a charging control confirmation command to the SGW to confirm the location information of the received user. Of course, in the embodiment of the present invention, the mobility management network element may also be an SGSN, and the process is the same as the description of the foregoing steps. With the method provided by the embodiment of the present invention, the SGW can send the location information of the UE to the PGW requesting the MME to report the location information, and the SGW can prevent the SGW from transmitting the location information to all the PGWs, which can reduce the signaling expenditure. Referring to FIG. 6, an embodiment of the present invention provides a service gateway, including: a receiving unit 602, configured to receive a modify bearer request message sent by a mobility management network element, where the modify bearer request message includes an identifier of a packet data gateway. Location information of the user equipment;

The sending unit 604 is configured to send location information of the user equipment received by the receiving unit to a packet data gateway corresponding to the identifier of the packet data gateway. In another embodiment of the present invention, the receiving unit 602 may include:

The first receiving subunit 6021 is configured to receive a modify bearer request message sent by the mobility management network element during a routing area update RAU or a tracking area update TAU of the user equipment; or

The second receiving sub-unit 6022 is configured to receive a modify bearer request message that is sent by the mobility management network element after detecting that the location information of the user equipment is changed, where the modify bearer request message includes the location change of the user equipment. location information. In another embodiment of the present invention, the sending unit 604 includes: a first sending subunit 6041, configured to: when the identifier of the packet data gateway includes a fully qualified tunnel endpoint identifier F-TEID of the packet data gateway, Determining, by the F-TEID, a General Packet Radio Service Tunneling Protocol GTP tunnel that sends the Modify Bearer Request message, and transmitting the location information of the user equipment to the packet data gateway by using the determined GTP tunnel; or the second sender The unit 6042 is configured to: when the identifier of the packet data gateway includes a default bearer identifier or a dedicated bearer identifier, determine packet data network PDN connection context information according to the default bearer identifier or the dedicated bearer identifier, and according to the The PDN connection context information is used to obtain the F-TEID of the packet data gateway, and the GTP tunnel that sends the modify bearer request message is determined according to the F-TEID, and the location information of the user equipment is sent to the determined GTP tunnel to Said a packet data gateway; or a third sending subunit 6043, configured to: when the identifier of the packet data gateway includes at least one of an F-TEID, a default bearer identifier, and a dedicated bearer identifier of the packet data gateway, according to the grouping The identifier of the data gateway is used to search for the corresponding PDN connection context information, and the session connection is determined according to the session identifier in the PDN connection context information, and the modified bearer request message is sent to the policy decision entity PCRF through the determined session connection. And causing the PCRF to send location information of the user equipment to the packet data gateway by using the determined session connection. The service gateway provided by the embodiment of the present invention receives the update bearer request message sent by the mobility management network element, where the modify bearer request message includes the location information of the UE and the identifier of the PGW, and the SGW may send the location information of the UE sent by the mobility management network element. The PGW corresponding to the identifier sent to the PGW saves signaling overhead. Referring to FIG. 7, an embodiment of the present invention provides a communication system, including: a mobility management network element 702, configured to send a modify bearer request message to a serving gateway 704, where the modify bearer request message includes an identifier of a packet data gateway. Location information of the user equipment;

The serving gateway 704 is configured to receive a modify bearer request message sent by the mobility management network element 702, and send location information of the user equipment to a packet data gateway corresponding to the packet data gateway identifier. In another embodiment of the present invention, the mobility management network element 702 is further configured to determine, according to the location reporting indication information sent by the packet data gateway, a packet data gateway that receives location information of the user equipment. In another embodiment of the present invention, the mobility management network element 702 is configured to send a modify bearer request message to the service gateway during a routing area update RAU or a tracking area update TAU of the user equipment; or

The mobile management network element 702 is configured to send a modify bearer request message to the serving gateway after detecting that the location information of the user equipment is changed, where the modify bearer request message includes the user equipment bit Set the changed position information. In another embodiment of the invention,

The service gateway 704 is configured to: when the identifier of the packet data gateway includes the fully qualified tunnel endpoint identifier F-TEID of the packet data gateway, determine, according to the F-TEID, a general packet radio service tunneling protocol that sends the modified bearer request message. a GTP tunnel, where the location information of the user equipment is sent to the packet data gateway by using the determined GTP tunnel; or

The serving gateway 704 is configured to: when the identifier of the packet data gateway includes a default bearer identifier or a dedicated bearer identifier, determine, according to the default bearer identifier or the dedicated bearer identifier, a PDN connection context information of the packet data network, and according to the The PDN connection context information is used to obtain the F-TEID of the packet data gateway, and the GTP tunnel that sends the modify bearer request message is determined according to the F-TEID, and the location information of the user equipment is sent by using the determined GTP tunnel. Giving the packet data gateway; or

The service gateway 704 is configured to: when the identifier of the packet data gateway includes at least one of an F-TEID, a default bearer identifier, and a dedicated bearer identifier of the packet data gateway, search for a corresponding PDN according to the identifier of the packet data gateway. Connecting the context information, and determining a session connection according to the session identifier in the PDN connection context information, and sending the modify bearer request message to the policy decision entity PCRF through the determined session connection, so that the PCRF sends the user Location information of the device is sent to the packet data gateway over the determined session connection. In another embodiment of the present invention, the communication system may further include:

a packet data gateway, configured to send the location reporting indication information and the identity information of the user equipment to the mobility management network element 702, and receive the modify bearer request message sent by the serving gateway 704, according to the modify bearer request message. Acquiring the location information of the user equipment; the mobility management network element 702 is configured to receive the location reporting indication information and the identifier of the user equipment sent by the packet data gateway, and send the user equipment identifier to the location information of the corresponding user equipment. Give the packet data gateway. Referring to FIG. 8, in another embodiment of the present invention, the communication system may further include: a service gateway 704, configured to search for corresponding PDN connection context information according to the identifier of the packet data gateway, and connect according to the PDN. The session identifier in the context information determines a session connection, and the modified bearer request message is sent to the policy decision entity 706 through the determined session connection; the policy decision entity 706 passes the location information of the user equipment sent by the service gateway 704 The determined session connection is sent to the packet data gateway. With the communication system provided by the embodiment of the present invention, the serving gateway receives the update bearer request message sent by the mobility management network element, where the modify bearer request message includes the location information of the UE and the identifier of the PGW, and the SGW may send the mobility management network element. The location information of the UE is sent to the PGW corresponding to the identifier of the PGW, which saves signaling overhead. A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Claim

A method for message routing, comprising:

Receiving a modify bearer request message sent by the mobility management network element, where the modify bearer request message includes an identifier of the packet data gateway and location information of the user equipment;

The location information of the user equipment is sent to a packet data gateway corresponding to the identity of the packet data gateway.

The message routing method according to claim 1, wherein the receiving the change bearer request message sent by the mobility management network element further includes:

The mobility management network element determines, according to the location reporting indication information sent by the packet data gateway, a packet data gateway that receives the location information of the user equipment, and sends the location information of the user equipment and the identifier information of the determined packet data gateway to Service gateway.

The message routing method according to claim 2, wherein the mobile management network element determines, according to the location reporting indication information sent by the packet data gateway, the packet data gateway that receives the location information of the user equipment, including: Obtaining, by at least one of the data network PDN connection context information, the packet data protocol PDP context information, and the bearer context information, the location reporting indication information sent by the packet data gateway, and determining a packet data gateway that receives location information of the user equipment; or

And the mobile management network element receives the packet radio service tunneling protocol GTP message sent by the serving gateway, obtains the location reporting indication information sent by the packet data gateway according to the GTP message, and determines a packet data gateway that receives the location information of the user equipment.

The method according to claim 1, wherein the receiving the modify bearer request message sent by the mobility management network element comprises:

Receiving a modify bearer request message sent by the mobility management network element in the routing area update RAU of the user equipment or the tracking area update TAU; or

Receiving the modification of the mobile management network element after detecting the change of the location information of the user equipment And carrying the request message, where the modify bearer request message includes location information after the location change of the user equipment.

The message routing method according to any one of claims 1 to 4, wherein the transmitting the location information of the user equipment to the packet data gateway corresponding to the identifier of the packet data gateway comprises:

When the identifier of the packet data gateway includes a fully qualified tunnel endpoint identifier F-TEID of the packet data gateway, determining, according to the F-TEID, a general packet radio service tunneling protocol GTP tunnel that sends the modified bearer request message, by using the F-TEID Determining a GTP tunnel to send location information of the user equipment to the packet data gateway; or

Determining packet data network PDN connection context information according to the default bearer identifier or the dedicated bearer identifier, and obtaining, according to the PDN connection context information, when the identifier of the packet data gateway includes a default bearer identifier or a dedicated bearer identifier The F-TEID of the packet data gateway determines, according to the F-TEID, a GTP tunnel that sends the modify bearer request message, and sends the location information of the user equipment to the packet data gateway by using the determined GTP tunnel. ; or

When the identifier of the packet data gateway includes at least one of an F-TEID, a default bearer identifier, and a dedicated bearer identifier of the packet data gateway, searching for corresponding PDN connection context information according to the identifier of the packet data gateway, and according to The session identifier in the PDN connection context information determines a session connection, and the modified bearer request message is sent to the policy decision entity PCRF through the determined session connection, so that the PCRF passes the location information of the user equipment The determined session connection is sent to the packet data gateway.

6. A service gateway, comprising:

a receiving unit, configured to receive a modify bearer request message sent by the mobility management network element, where the modify bearer request message includes an identifier of the packet data gateway and location information of the user equipment;

And a sending unit, configured to send location information of the user equipment received by the receiving unit to a packet data gateway corresponding to the identifier of the packet data gateway.

The service gateway according to claim 6, wherein the receiving unit comprises: a first receiving subunit, configured to receive a modify bearer request message sent by the mobility management network element during a routing area update RAU or a tracking area update TAU of the user equipment; or

a second receiving subunit, configured to receive a modify bearer request message sent by the mobility management network element after detecting that the location information of the user equipment is changed, where the modify bearer request message includes the location of the user equipment after the location change information.

The service gateway according to claim 6 or 7, wherein the sending unit comprises: a first sending subunit, configured to: when the identifier of the packet data gateway includes a fully qualified tunnel endpoint identifier of a packet data gateway Determining, by the F-TEID, a general packet radio service tunneling protocol GTP tunnel that sends the modified bearer request message, and sending the location information of the user equipment to the packet data by using the determined GTP tunnel Gateway; or

a second sending subunit, configured to determine a PDN connection context information of the packet data network according to the default bearer identifier or a dedicated bearer identifier, when the identifier of the packet data gateway includes a default bearer identifier or a dedicated bearer identifier, and Obtaining, according to the PDN connection context information, an F-TEID of the packet data gateway, determining, according to the F-TEID, a GTP tunnel that sends the modify bearer request message, where the location of the user equipment is determined by using the determined GTP tunnel Sending information to the packet data gateway; or a third sending subunit, configured to: when the identifier of the packet data gateway includes at least one of an F-TEID, a default bearer identifier, and a dedicated bearer identifier of the packet data gateway, Searching, according to the identifier of the packet data gateway, the corresponding PDN connection context information, and determining a session connection according to the session identifier in the PDN connection context information, and sending the modify bearer request message to the policy decision by using the determined session connection An entity PCRF, such that the PCRF passes the location information of the user equipment through the The determined session connection is sent to the packet data gateway.

9. A communication system, comprising:

a mobility management network element, configured to send a modify bearer request message to the serving gateway, where the modify bearer request message includes an identifier of the packet data gateway and location information of the user equipment;

And a service gateway, configured to receive a modify bearer request message sent by the mobility management network element, and send location information of the user equipment to a packet data gateway corresponding to the packet data gateway identifier.

10. The communication system according to claim 9, wherein:

The mobility management network element is further configured to determine, according to the location reporting indication information sent by the packet data gateway, a packet data gateway that receives location information of the user equipment.

11. The communication system according to claim 9, wherein:

The mobility management network element is configured to send a modify bearer request message to the serving gateway during a routing area update RAU or a tracking area update TAU of the user equipment; or

And sending a modify bearer request message to the service gateway after detecting that the location information of the user equipment is changed, where the modify bearer request message includes the location information after the location change of the user equipment.

12. A communication system according to any of claims 9 to 11, characterized in that

The serving gateway is configured to: when the identifier of the packet data gateway includes a fully qualified tunnel endpoint identifier F-TEID of the packet data gateway, determine, according to the F-TEID, a general packet radio service tunnel that sends the modify bearer request message a protocol GTP tunnel, where the location information of the user equipment is sent to the packet data gateway by using the determined GTP tunnel; or

And determining, when the identifier of the packet data gateway includes a default bearer identifier or a dedicated bearer identifier, determining packet data network PDN connection context information according to the default bearer identifier or a dedicated bearer identifier, and according to the PDN connection context Obtaining an F-TEID of the packet data gateway, determining, according to the F-TEID, a GTP tunnel that sends the modify bearer request message, and sending, by using the determined GTP tunnel, location information of the user equipment to the packet Data gateway; or

When the identifier of the packet data gateway includes at least one of an F-TEID, a default bearer identifier, and a dedicated bearer identifier of the packet data gateway, searching for corresponding PDN connection context information according to the identifier of the packet data gateway, Determining a session connection according to the session identifier in the PDN connection context information, and sending the modify bearer request message to the policy decision entity PCRF through the determined session connection, so that the PCRF sets the location information of the user equipment. Sending to the packet data gateway through the determined session connection.

The communication system according to any one of claims 9 to 11, further comprising: a service gateway, configured to search for a corresponding PDN connection context letter according to the identifier of the packet data gateway And determining, according to the session identifier in the PDN connection context information, the session connection, and sending the modify bearer request message to the policy decision entity by using the determined session connection;

The policy decision entity sends the location information of the user equipment sent by the serving gateway to the packet data gateway through the determined session connection.