WO2016155277A1

WO2016155277A1 - Method, core network element, user equipment and system for realizing default route decision

Info

Publication number: WO2016155277A1
Application number: PCT/CN2015/091132
Authority: WO
Inventors: 周星月; 苏翠斯; 周晓云
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-03-27
Filing date: 2015-09-29
Publication date: 2016-10-06
Also published as: CN106162801A

Abstract

Published are a method, a core network element, a user equipment and a system for realizing a default route decision, the method comprising: the core network element chooses a default route according to a default route preconfigured by the user equipment UE; and the core network element notifies the chosen default route to the UE which is used as a default route for stream migration.

Description

Method for implementing default route decision, core network element, user equipment and system

Technical field

This application relates to, but is not limited to, IP traffic flow processing techniques.

Background technique

With the increasing maturity of wireless local area network (WLAN) access technologies and the demand for high-speed wireless access networks, domestic and foreign operators are vigorously developing WLAN services; WLAN services are used as traffic distribution services for cellular data networks. Its role is also becoming more and more important. The Evolved Packet System (EPS) supports interworking with the 3rd Generation Partnership Project (3GPP) network and implements interworking with non-3GPP networks through the S2a/S2b/S2c interface. Non-3GPP networks include trusted non-3GPP networks and untrusted non-3GPP networks. Protocol IP access interconnected between networks that can trust non-3GPP networks can interface directly with Packet Data Network-Gateway (P-GW) through S2a; IP access for untrusted non-3GPP networks requires evolved data gateways (ePDG) The Evolved Packet Data Gateway is connected to the P-GW, and the ePDG and the P-GW are connected through the interface S2b. 3GPP regards WLAN as a non-3GPP access network, which is divided into Trusted WLAN access network (TWAN) and Untrusted WLAN access network (TWAN). - GW's S2aGTP/PMIPv6 interface.

In a trusted WLAN access scenario, the user equipment (UE) establishes a running packet data network (PDN) connection in three modes: the first one is a transparent single connection mode, that is, the 11R version (Rel-11, Release 11) supports The WLAN accessing the 4G core network (EPC) that has no impact on the user equipment, the UE can only establish a single packet data connection through the WLAN network, and does not support the UE to switch the packet data connection between the WLAN access network and the 3GPP access network. . The data connection may be a packet data connection to the EPC, or a NSW-seamless WLAN offload connection directly connected to the data network from the WLAN network; the second is a single connection mode, and the mode supports The UE establishes a connection on the TWAN but only supports establishing a single PDN connection, and supports switching of the packet data network connection between the WLAN and the 3GPP; the third is a multi-connection mode, which supports the UE to establish multiple PDN connections on the TWAN, and Support in WLAN and 3GPP Switching between packet data network connections.

The IFOM (IP Flow Mobility) technology can implement the migration of IP service flows between different access systems. The UE can modify the service flow routing path according to the network congestion status and policies to ensure communication quality and improve user experience. 1 is a schematic diagram of a flow migration principle. As shown in FIG. 1, a UE is connected to a same PDN through a 3GPP access network and a non-3GPP (for example, WLAN) access network, and the service flow through the 3GPP network includes a Web service flow and a file transfer protocol ( FTP (File Transfer Protocol) stream; wherein line 1 represents a voice over internet protocol (VoIP) service flow, line 2 represents a conventional video service stream (Conv.video), and line 3 represents a non-legacy video service stream ( Non-conv.video), line 4 represents the web page service flow, line 5 represents the FTP file transmission service flow; when the UE moves to the area where the WLAN signal coverage is weak, the quality of the service stream transmitted through the WLAN is affected, at this time, The UE initiates an IFOM process of migrating the web stream from the WLAN to the 3GPP to ensure the transmission quality of the web application. FIG. 2 is a schematic diagram of the flow migration principle after the web traffic is successfully migrated. As shown in FIG. 2, the path of the web service flow is changed to be transmitted in the 3GPP network.

IFOM is divided into: host-based mobility management protocols based on the types of mobility management protocols used by users, such as IFOM and network-based mobility management based on Dual-Stack Mobile IPv6 (DSMIPv6). Network-based IP flow mobility (NB-IFOM), such as tunnel-based protocol or proxy mobile IPv6 protocol (for example, GPRS Tunneling Protocol (GTP) or proxy mobile IPv6 protocol (PMIPv6GPRS, Proxy Mobile) IPv6) stream migration. The IFOM scheme based on DSMIPv6 is already supported by 3GPP. Specifically, the UE and the network negotiate IFOM information through DSMIPv6 signaling. After the signaling negotiation, the UE and the network pair corresponding IFOM routing rules. The information is modified and updated. Here, the initiation of the IFOM based on DSMIPv6 is performed by the UE side; the UE can simultaneously access the same P through the 3GPP access network and the non-3GPP access network (such as the WLAN access network). - GW, the P-GW allocates an IP address to the UE, and the allocated IP address is used on both the 3GPP network and the non-3GPP network, supporting the service data flow in the 3GPP network and the non-3GPP network. The migration between the networks; for example, during the UE accessing the 3GPP network and the non-3GPP network, the UE is not in the coverage area of the non-3GPP network after the mobile is moved, but is still in the coverage area of the 3GPP network, and may pass the non-3GPP. The network access service is migrated to the 3GPP network; or when the non-3GPP network is congested, the UE can migrate the service with high real-time requirements to the 3GPP network.

Currently, 3GPP is studying the flow migration supporting NB-IFOM; specifically, the UE establishes a PDN connection supporting the flow migration in the EPC through the 3GPP network and the non-3GPP network (for example, WLAN) by using the GTP/PMIPv6, that is, the multi-access packet data network. A multi-access PDN connection establishes a PDN connection that allocates the same IP address on the 3GPP network and the non-3GPP network, and the IP stream migration policy can be updated between the UE and the network, on the 3GPP network and the non-3GPP network. In this process, the UE notifies the network that the currently established connection is established for the NB-IFOM. When the network supports the NB-IFOM, the NB-IFOM indication is returned to the UE. The update of the NB-IFOM policy, such as adding, deleting, or modifying, may be initiated by the UE side or by the network side. The scenario in which the IFOM is initiated by the UE side includes: the UE initiates a flow migration request to the network according to the IFOM update policy provided by the Access Network Discovery and Selection Function (ANDSF), and the UE senses the change of the air interface environment at the first time. Initiating a flow migration request according to the signal strength, performing a configuration update on the UE, and initiating a flow migration request; the scenario in which the network side initiates the IFOM includes: the network side initiates a flow migration request according to the operator's pre-configured policy, and the operator according to the network side current The congestion situation updates the IFOM policy, initiates a stream migration request, and so on.

As can be seen from the above, in the NB-IFOM process, the path of the IP packet is determined by the routing rule. When the IP packet is filtered in the IP packet and the routing rule (such as IP address, Transmission Control Protocol/User Datagram Protocol (TCP/UDP)) When the port number, protocol number, etc. match, the IP packet is received and sent according to the access network indicated by the routing rule (such as 3GPP or WLAN). If the IP packet does not match the routing rule, the IP packet must be sent and received according to the path indicated by the default routing rule. However, how to decide the default route has not been resolved in NB-IFOM.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

This document provides a method for implementing default route decisions, a core network element, a user equipment, and a system, and can determine a default route.

A method of implementing default routing decisions, including:

The core network element determines the default route according to the default route pre-configured by the user equipment UE;

The core network element notifies the UE of the default route of the decision as the default route of the flow migration.

Optionally, the pre-configured default route is: a default route configured by the operator or the user for the UE.

Optionally, the default route of the core network element decision includes:

When the core network element confirms accepting the pre-configured default route according to the routing policy and/or routing configuration of the access network, the pre-configured default route is used as the default route for decision; the pre-configuration is not accepted. The default route is used as the default route for the decision.

Optionally, before the determining the default route, the method further includes: the core network element receiving the default route pre-configured by the UE sent by the UE.

Optionally, when the core network element does not receive the preset route by the UE, the method further includes:

The core network element indicates the default route to the UE as the default route for decision.

Optionally, the core network element indicating the default route to the UE includes:

The core network element indicates a default route to the UE according to the network configuration or the subscription information of the user.

Optionally, the method further includes:

When the core network element determines to update the default route according to the routing policy and/or the routing configuration of the access network, the core network element sends an updated default route to the UE, so that the UE is based on the updated default route. Update the default route of the current stream migration.

Optionally, the access network is a third generation partnership plan 3GPP access network or a wireless local area network WLAN access network;

The core network element is a network element of a 3GPP core network.

Optionally, the method further includes: setting the rule of the default route is valid when the packet data network PDN connection established by the access network involved in the flow migration is in an active state.

Optionally, the core network element includes at least one of the following network elements: dynamic policy and charging rule control PCRF, packet data network gateway PDN GW, home subscriber server HSS, 3GPP authentication, authorization, accounting AAA, and access Network discovery and selection function ANDSF.

A method of implementing default routing decisions, including:

The UE sends a pre-configured default route to the core network element, so that the core network element determines the default route according to the default route preset by the UE.

The UE receives the default route determined by the core network element as the default route of the flow migration.

Optionally, the method further includes:

When the UE receives the default route to which the core network element sends the update, the default route of the current flow migration is updated according to the updated default route.

A core network element for implementing a default routing decision includes: a decision unit and a decision notification unit; wherein

a decision unit, configured to: determine a default route according to a default route pre-configured by the user equipment UE;

The decision notification unit is configured to: notify the UE of the default route of the decision as the default route of the flow migration.

Optionally, the core network element further includes a receiving unit, configured to: receive a preset route pre-configured by the UE sent by the UE.

Optionally, the decision unit is set to,

When the pre-configured default route is accepted according to the routing policy and/or the route configuration of the access network, the pre-configured default route is used as the default route for decision; the pre-configured default route is not accepted. The default route is pre-determined as the default route for the decision.

Optionally, the decision unit is further configured to

When the core network element does not receive the UE pre-configuring the default route, the UE is indicated to the default route as the default route of the decision.

Optionally, the decision unit is further configured to

When the core network element does not receive the preset route, the UE indicates the default route as the default route of the decision according to the network configuration or the subscription information of the user.

Optionally, the core network element further includes an update unit, configured to

When the default route is updated according to the routing policy and/or routing configuration of the access network, the UE sends The updated default route is sent, so that the UE updates the default route of the current stream migration according to the updated default route.

Optionally, the access network is a 3GPP access network or a WLAN access network;

The core network element is a core network element of the 3GPP access network.

Optionally, the core network element includes at least one of the following network elements: a PCRF, a PDN GW, an HSS, a 3GPP AAA, and an ANDSF.

A user equipment for implementing a default routing decision includes: a sending unit and a receiving unit;

The sending unit is configured to: send a pre-configured default route to the core network element, so that the core network element determines a default route according to the default route preset by the UE;

The receiving unit is configured to: receive a default route determined by the core network element as the default route of the flow migration.

Optionally, the user equipment further includes an update routing unit, configured to: when receiving the updated default route to the core network element, update the default route of the current flow migration according to the updated default route.

A system for implementing a default routing decision includes: a core network element and a user equipment, where the core network element includes: a decision unit and a decision notification unit,

The decision notification unit is configured to: notify the UE of the default route of the decision as the default route of the flow migration;

The user equipment includes: a sending unit and a receiving unit; wherein

The sending unit is configured to: send a pre-configured default route to the core network element;

A computer readable storage medium storing computer executable instructions for performing the method of any of the above.

Compared with the related art, the technical solution of the present application includes: the core network element determines the default route according to the default route pre-configured by the user equipment UE; and the core network element notifies the UE of the default route of the decision as the flow migration defect. Provincial routing. The method of the embodiment of the present invention determines a default route by using a default route pre-configured by the core network element according to the UE. In addition, when the default route pre-configured by the UE is not received, the default route is indicated to the UE, and the default is implemented. Routing decisions.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

Figure 1 is a schematic diagram of the principle of flow migration;

2 is a schematic diagram of a flow migration principle after a successful migration of a web stream;

3 is a flowchart of a method for implementing a default route decision according to an embodiment of the present invention;

4 is a flowchart of another method for implementing a default route decision according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a core network element that implements a default routing decision according to an embodiment of the present invention;

6 is a structural block diagram of a user equipment that implements a default routing decision according to an embodiment of the present invention;

7 is a schematic structural diagram of TWAN access to an EPC network deployment;

Figure 8 is a flowchart of a method according to a first embodiment of the present invention;

Figure 9 is a flow chart of a method according to a second embodiment of the present invention;

Figure 10 is a flowchart of a method according to a third embodiment of the present invention;

Figure 11 is a flowchart of a method according to a fourth embodiment of the present invention;

Figure 12 is a flowchart of a method according to a fifth embodiment of the present invention;

Figure 13 is a flowchart of a method according to a sixth embodiment of the present invention;

Figure 14 is a flowchart of a method according to a seventh embodiment of the present invention;

Figure 15 is a flowchart of a method according to an eighth embodiment of the present invention;

Figure 16 is a flow chart of a method of a ninth embodiment of the present invention;

Figure 17 is a flow chart of a method of a tenth embodiment of the present invention;

Figure 18 is a flow chart showing the method of the eleventh embodiment of the present invention;

Figure 19 is a flow chart of the method of the twelfth embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

FIG. 3 is a flowchart of a method for implementing a default route decision according to an embodiment of the present invention. As shown in FIG. 3, when a packet network (PDN) connection is established in an access network, the method includes:

Step 300: The core network element determines a default route according to a default route pre-configured by the user equipment UE.

In this step, the default route configured in advance is the default route configured by the carrier or user for the UE.

In this step, the default route of the core network element decision includes:

Here, the predetermined default route refers to one or one of the network side, and the default route determined by the network element according to the operator policy, the routing policy, and the like.

Before the method of determining the default route, the method of the embodiment of the present invention further includes: the core network element receives the default route pre-configured by the UE sent by the UE.

When the core network element does not receive the UE pre-configured default route, the method of the embodiment of the present invention further includes:

The default network route indicated by the core network element to the UE as the default route may include: the core network element indicates the default route to the UE according to the network configuration or the subscription information of the user.

Step 301: The core network element notifies the UE of the default route of the decision as the default route of the flow migration.

The method of the embodiment of the invention further includes:

When the core network element determines to update the default route according to the routing policy and/or the route configuration of the access network, the core network element sends an updated default route to the UE, so that the UE migrates the current flow according to the updated default route. The default route is updated.

In the method of the embodiment of the present invention, the access network is a third generation partnership project (3GPP) access network or a wireless local area network (WLAN) access network;

The core network element is the core network element of the 3GPP access network.

The method of the embodiment of the present invention further includes: setting the rule of the default route is valid when the PDN connection established by the access network involved in the flow migration is in an active state.

The core network element includes at least one of the following network elements: Dynamic Policy and Charging Rules Control (PCRF), and/or Packet Data Network Gateway (PDN GW), and/or Home Subscriber Server (HSS), and/or 3GPP authentication. , Authorization and Accounting (AAA), and/or Access Network Discovery and Selection (ANDSF).

FIG. 4 is a flowchart of another method for implementing a default route decision according to an embodiment of the present invention. As shown in FIG. 4, the method includes:

Step 400: The UE sends a pre-configured default route to the core network element, so that the core network element performs a default route according to the default routing policy pre-configured by the UE.

Step 401: The UE receives a default route determined by the core network element as a default route of the flow migration.

The method of the embodiment of the invention further includes:

When the UE receives the updated default route to which the core network element sends the update, the default route of the current flow migration is updated according to the updated default route.

5 is a structural block diagram of a core network element that implements a default route decision according to an embodiment of the present invention. As shown in FIG. 5, the method includes at least a decision unit 51 and a decision notification unit 52.

The determining unit 51 is configured to: determine a default route according to a default route pre-configured by the user equipment UE;

The decision notification unit 52 is configured to notify the UE of the default route of the decision as the default route of the flow migration.

The core network element of the embodiment of the present invention further includes a receiving unit 53 configured to: receive a default route pre-configured by the UE sent by the UE.

Decision unit 52 is set to,

Decision unit 52 is also configured to

When the core network element does not receive the preset route configured by the UE, the UE is instructed to use the default route as the default route for decision.

Optionally, the decision unit 52 is further configured to

The core network element of the embodiment of the present invention further includes an updating unit 54 configured to

When the default route is updated according to the routing policy and/or the route configuration of the access network, the updated default route is sent to the UE, so that the UE updates the default route of the current flow migration according to the updated default route.

Here, the access network is a 3GPP access network or a WLAN access network;

The core network element includes at least one of the following network elements: PCRF, PDN GW, HSS, 3GPP AAA, and ANDSF.

FIG. 6 is a structural block diagram of a user equipment that implements a default routing decision according to an embodiment of the present invention. As shown in FIG. 6, the method includes: a sending unit 61 and a receiving unit 62.

The sending unit 61 is configured to: send a pre-configured default route to the core network element, so that the core network element determines a default route according to the default route preset by the UE;

The receiving unit 62 is configured to: receive a default route of the core network element decision as a lack of flow migration Provincial routing.

The user equipment further includes an update routing unit 63 configured to: when receiving the updated default route to the core network element, update the default route of the current flow migration according to the updated default route.

A system for implementing a default routing decision includes a core network element and a user equipment, where the core network element includes: a decision unit and a decision notification unit.

The user equipment includes: a sending unit and a receiving unit; wherein

For a clear and detailed description of the embodiment, the network architecture formed by the EPONG access to the EPC by the TWAN or the untrusted WLAN access network is explained before the example is made. FIG. 7 is a schematic diagram of the architecture of the TWAN or ePDG access to the EPC network deployment, such as As shown in FIG. 7, the TWAN to PDN GW is an S2a interface, the ePDG to PDN GW is an S2b interface, the authentication interface between the TWAN and the 3GPP AAA is STa, and the authentication interface between the ePDG and the 3GPP AAA is SWm, 3GPP AAA and HSS The interface between them is SWx.

Example 1

The UE is pre-configured with a default route for the NB-IFOM. The UE first establishes a multi-access PDN connection in the initial 3GPP attachment. In this process, the UE and the core network element complete the NB-IFOM pre-configured default route confirmation. The acknowledgment may be performed according to the routing policy and/or the routing configuration of the access network; the UE establishes a multi-access PDN connection in the WLAN access network. In this embodiment, the dynamic policy and charging rule control (PCC) is an optional architecture, that is, the setting of the PCRF is optional. In this embodiment, in the case of a PCRF, it is determined by the PCRF or the PDN GW how to decide the default route; in the case of no PCRF, the PDN GW determines how to decide the default route. Figure 8 is the first embodiment of the present invention A method flow chart of the embodiment, as shown in FIG. 8, includes:

Step 801: The UE sends a pre-configured default route for IP flow migration to the mobility management unit (MME).

Step 802: If the attach request message does not have integrity protection or integrity protection fails, the UE performs an authentication and authentication process of the MME to the home subscription subscriber server (HSS).

Step 803: The MME sends the attach request information including the default route to the packet data network gateway (PDN GW) through the service gateway (SGW).

Step 804: If it is determined by the PDN GW how to determine the default route, the received default route of the UE is confirmed according to the routing policy or the route configuration. If accepted, the default route is included in the determined default route. The IP-CAN session establishment indication message is sent to the PCRF (in the case where the PCRF is set in the network); if the default route is not accepted, the PDN GW includes the predetermined default route in the IP-CAN session establishment indication message. It is sent to the PCRF. Here, the predetermined default route refers to one or one network-side default route determined by the network element according to the operator policy, routing policy, and the like.

If the default route is determined by the PCRF, the PDN GW sends the received default route to the PCRF in the IP-CAN session establishment indication message;

Step 805: The PCRF confirms the received default route of the UE according to the routing policy or the routing configuration. If yes, the default route is included in the IP-CAN session establishment acknowledgement message and sent to the PDN GW. If the default is not accepted, Provincial routing, the PCRF sends the predetermined default route to the PDN GW in the IP-CAN session establishment confirmation message;

Otherwise, after receiving the default route, the PCRF performs the corresponding policy formulation and returns a confirmation message to the PDN GW.

Step 806: The PDN GW includes the default route of the (PDN GW or PCRF) decision to be sent to the MME through the SGW in the setup session response message.

Step 807: The MME sends the received default route to the UE in an attach accept message.

Step 808: The UE establishes a multi-access PDN connection for stream migration from the trusted WLAN access network according to the default route.

Example 2

The UE is pre-configured with a default route for the NB-IFOM. The UE first establishes a multi-access PDN connection in the 3GPP initial attach, and the UE establishes a multi-access PDN connection in the WLAN access network, and runs on the WLAN access network. It is a single connection mode based on S2a. In this process, the UE and the core network complete the confirmation of the NB-IFOM pre-configured default route. In this embodiment, the dynamic policy and charging rule control (PCC) is an optional architecture, that is, the setting of the PCRF is optional. In the case of a PCRF, the default route is decided by the PCRF or the PDN GW; in the absence of a PCRF, the default route is decided by the PDN GW. FIG. 9 is a flowchart of a method according to a second embodiment of the present invention. As shown in FIG. 9, the method includes:

Step 901: The UE establishes a multi-access PDN connection for stream migration on the 3GPP.

Steps 902 to 906, the UE performs identity authentication, and receives an EAP request challenge message after verification.

The method includes: the UE and the TMAN perform request authentication; after requesting the authentication, the request authentication result is attached to the Diameter EAP Request message (DER, Diameter-EAP-Request) and sent to the 3GPP AAA/HSS, and the 3GPP AAA/HSS feeds back the EAP according to the DER message. A Diameter EAP Response message (DEA, Diameter-EAP-Answer) containing the request challenge message is sent to the TWAN, and the TWAN sends an EAP Request Challenge message to the UE.

Steps 907-908: The UE sends the local pre-configured default route for IP flow migration to the 3GPP AAA in the EAP challenge message.

The UE sends the UE's pre-configured default route to the TWAN in the EAP Challenge message. The TWAN attaches the EAP Challenge message containing the pre-configured default route to the DER message and sends it to the 3GPP AAA.

Steps 909-911, 3GPP AAA sends the received default route to the trusted WLAN access network (TWAN); the TWAN includes the default route in the session establishment request (Create Session Request) or the proxy binding update PBU message. Sent to the PDN GW;

If the default route is determined by the PDN GW, the pre-configured default route of the UE received by the PDN GW is confirmed. If accepted, the default route is included in the IP-CAN session establishment indication message and sent to the PCRF ( In the case where the PCRF is set in the network); if the default route is not accepted, the PDN GW includes the predetermined default route in the IP-CAN session establishment indication message. Sent to the PCRF;

If the default route is determined by the PCRF, the PDN GW sends the received default route to the PCRF in the IP-CAN session establishment indication message; the PDN GW forwards the default route to the PCRF.

Steps 912-717: If the default route is determined by the PCRF, the PCRF confirms the default route pre-configured by the received UE, and if accepted, the default route is included in the IP connection access network, (IP-CAN, The IP-Connectivity Access Network, the session establishment confirmation message is sent to the PDN GW; if the default route is not accepted, the PCRF sends the predetermined default route to the PDN GW in the IP-CAN session establishment confirmation message; otherwise After receiving the default route, the PCRF performs the corresponding policy formulation and returns a confirmation message to the PDN GW.

The PDN GW sends the predetermined default route to the UE through the TWAN/3GPP AAA in the Create Session Response or Proxy Binding Acknowledgement PBA message.

Steps 918-921 complete the remaining EAP authentication and authorization process. After receiving the EAP authentication and authorization request sent by the UE, the TWAN sends the DER information to the 3GPP. The 3GPP responds to the authorization request and sends the authorization result to the UE through the TWAN.

Example 3

The UE is pre-configured with a default route for the NB-IFOM. The UE first establishes a multi-access PDN connection in the 3GPP initial attach, and the UE establishes a multi-access PDN connection in the WLAN access network, and runs on the WLAN access network. It is based on the S2a multi-connection mode. In this process, the UE and the core network element complete the NB-IFOM pre-configured default route confirmation. In this embodiment, the dynamic policy and the charging rule control PCC are optional architectures, that is, the settings of the PCRF are optional. In the case of a PCRF, it is determined by the PCRF or PDN GW how to decide the default route; in the absence of a PCRF, the PDN GW determines how to decide the default route. FIG. 10 is a flowchart of a method according to a third embodiment of the present invention. As shown in FIG. 10, the method includes:

Step 1001: The UE sends the default route of the locally pre-configured IP flow migration to the TWAN in the WLCP connection setup request message.

Steps 1002 to 1003, the TWAN sends the default route to the PDN GW in the Create Session Request or the Proxy Binding Update PBU message;

If the PDN GW decides the default route, the default route root pre-configured for the received UE. Confirm according to the routing policy or routing configuration. If yes, the default route is included in the IP-CAN session establishment indication message and sent to the PCRF (in the case of setting the PCRF in the network); if not Accept, the PDN GW sends the predetermined default route to the PCRF in the IP-CAN session establishment indication message;

If the default route is decided by the PCRF, the PDN GW sends the received default route to the PCRF in the IP-CAN session establishment indication message.

Steps 1004 to 1005. If the PCRF determines the default route, the PCRF confirms the received UE default route according to the routing policy or the routing configuration. If yes, the default route is included in the IP-CAN session establishment confirmation message. Send to the PDN GW; if not, the PCRF sends the predetermined default route to the PDN GW in the IP-CAN session establishment confirmation message;

The PDN GW sends the default route of the network decision to the TWAN in the Create Session Response or Proxy Binding Acknowledgement PBA message.

Step 1006: The TWAN sends the received default route to the WLCP connection establishment corresponding message to the UE.

Example 4

The UE is pre-configured with a default route for the NB-IFOM. The UE first establishes a multi-access packet data network connection in the 3GPP initial attach, and the UE establishes a multi-access packet data network connection in the WLAN access network, and is connected to the WLAN. The incoming network is based on the S2b mechanism, in which the UE and the core network element complete the NB-IFOM pre-configured default route confirmation. In this embodiment, the dynamic policy and charging rule control (PCC) is an optional architecture, that is, the setting of the PCRF is optional. In the case of a PCRF, it is determined by the PCRF or PDN GW how to decide the default route; in the absence of a PCRF, the PDN GW determines how to decide the default route. 11 is a flowchart of a method according to a fourth embodiment of the present invention. As shown in FIG. 11, the method includes:

Step 1101: Perform IKEv2 authentication and tunnel establishment procedure between the UE, the ePDG, and the 3GPP AAA. In this process, the UE includes the locally pre-configured default route for IP flow migration in the Internet Key Exchange Authentication (IKE_AUTH) request. The message is sent to ePDG.

Before step 1101, the UE establishes a PDN connection for flow migration from the 3GPP, and establishes an EAP authentication authorization from the trusted WLAN access network.

Steps 1102 to 1103, the ePDG sends the pre-configured default route to the PDN GW in a session establishment request (Create Session Request) or a proxy binding update proxy binding update (PBU) message;

If the PDN GW decides the default route, the default route pre-configured by the received UE is confirmed according to the routing policy or the routing configuration. If accepted, the default route is included in the IP-CAN as the determined default route. The session establishment indication message is sent to the PCRF (in the case of setting the PCRF in the network); if not, the PDN GW sends the predetermined default route in the IP-CAN session establishment indication message to the PCRF;

Steps 1104 to 1105: If the PCRF decides the default route, the PCRF confirms the default route pre-configured by the received UE according to the routing policy or the routing configuration. If yes, the default route is included in the IP-CAN session establishment confirmation. The message is sent to the PDN GW; if not, the PCRF sends the predetermined default route to the PDN GW in the IP-CAN session establishment confirmation message;

The PDN GW sends the pre-acknowledged default route to the ePDG in the Create Session Response or Proxy Binding Acknowledgement PBA message.

Step 1106: The ePDG sends the received default route to the UE in the IKE_AUTH corresponding message.

Example 5

The UE does not pre-configure the default route for the NB-IFOM. The UE first establishes a multi-access packet data network connection in the initial 3GPP attachment. In this process, the core network element sends the default route confirmed by the NB-IFOM. A multi-access packet data network connection is then established in the WLAN access network. FIG. 12 is a flowchart of a method according to a fifth embodiment of the present invention, and FIG. 12 is substantially similar to FIG. 8 except that The default route that is pre-configured by the UE is not included in the message of the steps 1201 to 1204 corresponding to the 801 to 804. The PCRF directly sends the default route indicated by the core network element to the UE.

Example 6

The UE does not pre-configure the default route for the NB-IFOM. The UE first establishes a multi-access packet data network connection in the 3GPP initial attach; the UE establishes a multi-access packet data network connection in the WLAN access network, and is a single connection. mode. FIG. 13 is a flowchart of a method according to a sixth embodiment of the present invention. As shown in FIG. 13, the flowcharts in FIG. 13 and FIG. 9 are basically the same, except that the messages of steps 1307 to 1311 corresponding to steps 907 to 911 are not. The default route pre-configured by the UE is included. In step 1312, the PCRF directly sends the default route indicated by the core network element to the UE.

Example 7

The UE does not pre-configure the default route for the NB-IFOM. The UE first establishes a multi-access packet data network connection in the 3GPP initial connection; the UE establishes a multi-access packet data network connection in the WLAN access network, and is connected in multiple layers. mode. 14 is a flowchart of a method according to a seventh embodiment of the present invention. As shown in FIG. 14, the flow in FIG. 14 and FIG. 10 are basically the same, except that the messages in steps 1401 to 1403 corresponding to steps 1001 to 1003 are not. The default route pre-configured by the UE is included, and the PCRF directly sends the default route indicated by the core network element to the UE.

Example 8

The UE does not pre-configure the default route for the NB-IFOM. The UE first establishes a multi-access packet data network connection in the 3GPP initial attach; the UE establishes a multi-access packet data network connection in the WLAN access network, and is the S2b mechanism. . 15 is a flowchart of a method according to an eighth embodiment of the present invention. As shown in FIG. 15, the flow in FIG. 15 is substantially the same as that in FIG. 11, except that the messages in steps 1501 to 1503 corresponding to steps 1101 to 1103 are not. The default route pre-configured by the UE is included, and the PCRF directly sends the default route indicated by the core network element to the UE.

Example 9

In this embodiment, the UE has established a multi-access PDN connection established by the NB-IFOM through the 3GPP and the trusted WLAN, where the WLAN access adopts a multi-connection mode, and the network decision changes need to update the default route, and the PCRF The UE sends a default route request containing the update. FIG. 16 is a flowchart of a method according to a ninth embodiment of the present invention. As shown in FIG. 16, the method includes:

1601~1603: The PCRF sends the updated default route to the UE.

The PCRF sends the updated default route to the PDN GW and sends it to the PDN GW in the policy and charging rule provision message; the PDN GW saves the updated default route and includes the updated default route in the update bearer request or the update notification message. The middle is sent to the TWAN; the TWAN sends the default route to the UE through the WLCP request message.

1604~1606: The UE replies with an acknowledgement message to the core network element. After receiving the WLCP response message, the TWAN sends an update bearer response or acknowledgement message after updating the default route to the PGW, and the PGW sends an acknowledgement message to the PCRF.

Example 10

In this embodiment, the UE has established a multi-access PDN connection established by the NB-IFOM through the 3GPP and the trusted WLAN, and the network decision changes need to update the default route, and the PDN GW (when the default route is decided by the PDN GW) Or the PCRF (when the default route is determined by the PCRF) sends a message including the updated default route request message to the UE. FIG. 17 is a flowchart of the method according to the tenth embodiment of the present invention. As shown in FIG.

1701~1703: The PCRF sends the updated default route to the UE, including:

The PCRF sends the updated default route to the PDN GW in the policy and charging rule providing message; or the PDN GW includes the updated default route in the update bearer request or the update notification message, and sends the message to the MME through the SGW; the MME will The default route is sent to the UE through the NAS message.

1704~1706: The UE replies to the core network with a non-access stratum (NAS, Non-Access Stratum) message to confirm the updated default route;

After receiving the NAS response message, the MME sends an update bearer response or acknowledgement message after updating the default route to the PGW, and the PGW sends an acknowledgement message to the PCRF.

Example 11

In this embodiment, the UE has established a multi-access PDN connection established by the NB-IFOM through the 3GPP and the trusted WLAN. The network decision changes need to update the default access (default access), and the PDN GW (when determined by the PDN GW) When the route is saved) or the PCRF (when the default route is decided by the PCRF), the default route request message including the update is sent to the UE, and FIG. 18 is the present invention. The method flowchart of the eleventh embodiment, as shown in FIG. 18, includes:

1801 to 1803: The PCRF sends the updated default route to the UE.

1804~1806: The UE replies to the core network element with a NAS message confirming the updated default message;

Example 12

In this embodiment, the UE has established a multi-access PDN connection established by the NB-IFOM through the 3GPP and the untrusted WLAN. The network decision changes need to update the default access (default access), and the PDN GW (when determined by the PDN GW) When the default route is used, or the PCRF (when the default route is decided by the PCRF), the default route request message including the update is sent to the UE. FIG. 19 is a flowchart of the method according to the twelfth embodiment of the present invention, as shown in FIG. include:

1901~1903: The PCRF sends the updated default route to the UE.

The PCRF sends the updated default route to the PDN GW in the policy and charging rule providing message; or the PDN GW includes the updated default route in the update bearer request or the update notification message to the ePDG; the ePDG uses the default route The message is sent to the UE through a Network Key Exchange Protocol (IKE) message (INFORMATIONAL).

1904~1906: The UE replies to the ePDG with an IKE INFORMATIONAL response message to confirm the updated default route;

After receiving the INFORMATIONAL response message, the ePDG sends an update bearer response or acknowledgement message after updating the default route to the PGW, and the PGW sends an acknowledgement message to the PCRF.

Example 13

The UE is pre-configured with a default route for the NB-IFOM. The UE first establishes a multi-access packet data network connection in the initial 3GPP attachment. In this process, the UE and the core network element complete the determination of the NB-IFOM default route. Establish a multi-access packet data network connection in the WLAN access network. In In this embodiment, the default route is obtained from the HSS. In the initial attaching process, the MME sends the default route to the PGW/PCRF, and the PCRF/PGW is locally saved and sent to the UE.

Example 14

In this embodiment, the default route is obtained by the UE from the ANDSF. In the initial attaching process, the UE sends a default route to the PGW/PCRF, and the PCRF/PGW saves the acknowledgment message to the UE after being locally saved.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

In the embodiment of the present invention, the core network element is configured with a default route according to the UE, and the default route is determined. In addition, when the default route pre-configured by the UE is not received, the default route is indicated to the UE, and the default route is implemented. Decision making.

Claims

A method of implementing default routing decisions, including:

The core network element determines the default route according to the default route pre-configured by the user equipment UE;

The core network element notifies the UE of the default route of the decision as the default route of the flow migration.
The method of claim 1, wherein the pre-configured default route is a default route configured by an operator or a user for the UE.
The method of claim 2, wherein the core network element decision default route comprises:

When the core network element confirms accepting the pre-configured default route according to the routing policy and/or routing configuration of the access network, the pre-configured default route is used as the default route for decision; the pre-configuration is not accepted. The default route is used as the default route for the decision.
The method of claim 1, wherein the method further comprises: the core network element receiving the default route pre-configured by the UE sent by the UE.
The method of claim 1, wherein when the core network element does not receive the UE pre-configuring the default route, the method further includes:

The core network element indicates the default route to the UE as the default route for decision.
The method according to claim 5, wherein the indicating that the core network element indicates the default route to the UE comprises:

The core network element indicates a default route to the UE according to the network configuration or the subscription information of the user.
The method of claim 1 further comprising:

When the core network element determines to update the default route according to the routing policy and/or the routing configuration of the access network, the core network element sends an updated default route to the UE, so that the UE is based on the updated default route. Update the default route of the current stream migration.
The method according to any one of claims 1 to 7, wherein

The access network is a 3rd generation partner project 3GPP access network or wireless local area network WLAN connection Access to the network;

The core network element is a network element of a 3GPP core network.
The method according to claim 8, further comprising: setting the rule of the default route is valid when the packet data network PDN connection established by the access network involved in the flow migration is active.
The method according to any one of claims 1 to 7, wherein

The core network element includes at least one of the following network elements: dynamic policy and charging rule control PCRF, packet data network gateway PDN GW, home subscriber server HSS, 3GPP authentication, authorization and accounting AAA, and access network discovery and selection. Function ANDSF.
A method of implementing default routing decisions, including:

The UE sends a pre-configured default route to the core network element, so that the core network element determines the default route according to the default route preset by the UE.

The UE receives the default route determined by the core network element as the default route of the flow migration.
The method of claim 11 further comprising:

When the UE receives the default route to which the core network element sends the update, the default route of the current flow migration is updated according to the updated default route.
A core network element for implementing a default routing decision includes: a decision unit and a decision notification unit; wherein

a decision unit, configured to: determine a default route according to a default route pre-configured by the user equipment UE;

The decision notification unit is configured to: notify the UE of the default route of the decision as the default route of the flow migration.
A user equipment for implementing a default routing decision includes: a sending unit and a receiving unit;

The sending unit is configured to: send a pre-configured default route to the core network element, so that the core network element determines a default route according to the default route preset by the UE;

The receiving unit is configured to: receive a default route of the core network element decision as the default of the flow migration routing.
A system for implementing a default routing decision includes a core network element and a user equipment, where the core network element includes: a decision unit and a decision notification unit.

a decision unit, configured to: determine a default route according to a default route pre-configured by the user equipment UE;

The decision notification unit is configured to: notify the UE of the default route of the decision as the default route of the flow migration;

The user equipment includes: a sending unit and a receiving unit; wherein

The sending unit is configured to: send a pre-configured default route to the core network element;

The receiving unit is configured to: receive a default route determined by the core network element as the default route of the flow migration.
A computer readable storage medium storing computer executable instructions for performing the method of any of claims 1-12.