WO2013178178A2

WO2013178178A2 - Resource release method and device

Info

Publication number: WO2013178178A2
Application number: PCT/CN2013/080344
Authority: WO
Inventors: 涂杨巍; 詹亚军; 朱春晖; 王霞; 刘国燕
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-08-23
Filing date: 2013-07-29
Publication date: 2013-12-05
Also published as: CN103634941B; WO2013178178A3; CN103634941A

Abstract

Disclosed are a resource release method and device. The method comprises: a TWAG determining that network resource release needs to be conducted; and the TWAG sending to an AC/BNG a request message, the request message being used for instructing the AC/BNG to conduct network resource release. The present invention solves the problem of invalid occupation of a network resource caused by the resource release manner in an AC/BNG in the related art, and increases the use efficiency of the network resource.

Description

Resource release method and equipment

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a resource release method and apparatus. BACKGROUND OF THE INVENTION The Evolved Packet System (EPS) of the 3rd Generation Partnership Project (3GPP) is evolved by the Evolved Universal Terrestrial Radio Access Network (referred to as Evolved Universal Terrestrial Radio Access Network). E-UTRAN), Mobility Management Entity (MME), Serving Gateway (S-GW), Packet Data Network Gateway (PDN GW), and home subscribers The server (Home Subscriber Server, referred to as HSS) is composed. 1 is a schematic diagram of a network structure of a 3GPP network and a non-3GPP network according to the related art. As shown in FIG. 1, the EPS supports interworking with a non-3GPP system, wherein interworking with a non-3GPP system is implemented through an S2a/b/c interface. The PDN GW acts as an anchor between the 3GPP and the non-3GPP system. In the system architecture diagram of EPS, non-3GPP system access is divided into untrusted non-3GPP access and trusted non-3GPP access; wherein untrusted non-3GPP access requires evolved packet data gateway (Evolved Packet Data Gateway) For example, ePDG is connected to the PDN GW. The interface between the ePDG and the PDN GW is S2b. The trusted non-3GPP access can be directly connected to the PDN GW through the S2a interface. The S2a interface uses the PMIP protocol to exchange information. In addition, the S2c interface provides User plane-related control and mobility support between User Equipment (UE) and PDN GW. The supported mobility management protocol is Mobile IPv6 Support for Dual Stack Hosts and Routers, abbreviated as DSMIPv6), can be used for untrusted non-3GPP and trusted non-3GPP access. Wireless Local Area Network (WLAN) can be used as a non-3GPP system to access the Evolved Packet Core (EPC). This involves the interconnection and interworking of fixed-line mobile convergence that many operators pay attention to. problem. At present, there are many studies on the process and policy interworking of S2b and S2c interfaces, and there are few studies on S2a interfaces. Study on S2a Mobility based On GTP & WLAN access to EPC (SaMOG for short) The main topic is to study WLAN as a trusted non-3GPP IP access network (TNAN). The UE accesses the interconnection and interworking problem of the EPC through the S2a interface. In addition, the Universal Mobile Telecommunications System (UMTS) also supports interworking with non-3GPP systems; the difference is that the Serving General Packet Radio Service Support Node (Serving General Packet Radio Service Support Node, The SGSN is used instead of the MME and the S-GW, and the Gateway General Packet Radio Service Supporting Node (GGSN) is used instead of the P-GW. According to the actual network deployment, the Access Controller (AC)/Broadband Network Gateway (BNG) may be associated with the Trusted WLAN Access Gateway (TWAG). It is also possible to set up deployment. 2 is a schematic diagram of a network structure in which AC/BNG and TWAG are separately set according to the related art. As shown in FIG. 2, the network architecture of AC/BNG and TWAG is that the terminal is connected to the AC/BNG through the access point, and then passes through the TWAG. Accessing the PDN-GW in the 3GPP core network to use the 3GPP service, and the access authentication process required for accessing the part of the terminal needs to pass the WLAN authentication, authorization, and accounting server through TWAG (Authentication Authorization) And Accounting (referred to as AAA) is performed on the AAA/HSS server of the 3GPP core network. In the WLAN prior art, AC/BNG and TWAG are each responsible for the release of their network resources. When AC/BNG and TWAG are combined, they can be triggered uniformly through the network side, but when AC/BNG and TWAG are separated, The network side can only trigger the release of resources of the TWAG. The network resource release on the AC/BNG can only be completed by the timer timeout, which increases the invalid occupation of network resources. Therefore, the above problem also exists in other networks such as accessing the UMTS core network through the non-3GPP system. Aiming at the problem that the resource release mode of the AC/BNG in the related art leads to the invalid occupation of the network resources, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION The present invention provides a resource release solution, which at least solves the problem that the resource release mode of the AC/BNG in the related art causes invalid occupation of network resources. According to an aspect of the present invention, a resource release method is provided, including: TWAG determines that network resource release needs to be performed; and the TWAG sends a request message to an AC/BNG, where the request message is used to notify the AC/BNG to perform a network. Resource release. Preferably, after the TWAG sends the request message to the AC/BNG, the method further includes: the TWAG receiving a response message from the AC/BNG, where the response message is used to indicate the network resource of the AC/BNG The release operation is complete. Preferably, the TWAG determines that the network resource release is required to be included: the TWAG receives the detach request from the PDNGW/GGSN; or the TWAG receives the terminal deregistration request from the HSS/AAA. Preferably, before the TWAG sends the request message to the AC/BNG, the method further includes: the TWAG performing a network resource release operation. Preferably, the request message/response message is one of the following: a CoA message, a DM, an AS instruction. According to another aspect of the present invention, a resource release method is provided, including: an AC/BNG receiving a request message from a TWAG, where the request message is used to notify the AC/BNG to perform network resource release; /BNG performs a network resource release operation according to the request message. Preferably, after the AC/BNG performs the network resource release operation according to the request message, the method further includes: the AC/BNG sending a response message to the TWAG, where the response message is used to indicate the AC/ The network resource release operation of the BNG is completed. Preferably, the request message/response message is one of the following: a CoA message, a DM, an AS instruction. According to still another aspect of the present invention, a resource release apparatus is provided, located in the TWAG, and includes: a determining module, configured to determine that network resource release needs to be performed; and a first sending module, configured to send a request message to the AC/BNG, where The request message is used to notify the AC/BNG to perform network resource release. Preferably, the device further includes: a first receiving module, configured to receive a response message from the AC/BNG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed. Preferably, the determining module comprises: a receiving unit configured to receive a detach request from the PDNGW/GGSN; or, configured to receive a terminal deregistration request from the HSS/AAA. Preferably, the device further includes: a first processing module, configured to perform a network resource release operation. According to still another aspect of the present invention, a resource release apparatus is provided, located in the AC/BNG, including: a second receiving module, configured to receive a request message from the TWAG, where the request message is used to notify the The AC/BNG performs network resource release. The second processing module is configured to perform a network resource release operation according to the request message. Preferably, the device further includes: a second sending module, configured to send a response message to the TWAG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed. The TWAG is used to determine the release of the network resource by using the TWAG. The TWAG sends a request message to the AC/BNG, which is used to notify the AC/BNG of the release of the network resource, and solves the resource release mode of the AC/BNG in the related art. The problem of invalid use of network resources has increased the efficiency of using network resources. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a network structure in which a 3GPP network and a non-3GPP network are interworking according to the related art; FIG. 2 is a schematic diagram of a network structure in which AC/BNG and TWAG are separately arranged according to the related art; FIG. 3 is a schematic diagram of a network according to the present invention. FIG. 4 is a block diagram showing a structure of a resource release device according to an embodiment of the present invention; FIG. 5 is a block diagram showing a preferred structure of a resource release device according to an embodiment of the present invention; FIG. 7 is a block diagram of a preferred structure of a resource release apparatus according to an embodiment of the present invention; FIG. 8 is a flowchart of another resource release method according to an embodiment of the present invention; FIG. 10 is a block diagram showing a preferred structure of a resource release device according to an embodiment of the present invention; FIG. 11 is a block diagram showing a method for detaching a terminal according to an embodiment of the present invention; Flowchart 1; and FIG. 12 is a flowchart 2 of a method for detaching a terminal according to Embodiment 2 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. In this embodiment, a resource release method is provided. FIG. 3 is a flowchart of a resource release method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps: Step S302: TWAG determines that network resources need to be performed. The SGW sends a request message to the AC/BNG, and the request message is used to notify the AC/BNG to perform network resource release. In this embodiment, the TWAG notifies the AC/BNG to release the network resources when the network resource is released, so that the AC/BNG knows the time for releasing the network resources in time, compared with the time in the related art. When the device is timed out to release the network resources, the network resources can be released in a timely manner, and the time taken for the invalid use of the network resources is eliminated, and the problem of invalid use of the network resources caused by the AC/BNG resource release mode in the related art is solved. The efficiency of the use of network resources. Preferably, the TWAG can determine that the network resource release needs to be performed if the following occurs: Case 1: The TWAG receives the detach request from the PDN-GW/GGSN; Case 2: The TWAG receives the terminal from the HSS/AAA. Registration request. This method is easy to operate and achievable. After the TWAG sends the request message to the AC/BNG, the TWAG may directly perform subsequent processing, for example, sending a response message to the source PDN-GW/GGSN of the detach request, or sending a response message to the source HSS/AAA of the deregistration request. . As a preferred implementation manner, the TWAG may also wait to receive a response message from the AC/BNG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed. In this way, after receiving the response message of the AC/BNG, the TWAG performs the above-mentioned subsequent processing to ensure the stability of the AC/BNG network resource release operation and improve the system reliability. Preferably, the TWAG may perform a network resource release operation before sending the foregoing request message to the AC/BNG. In this way, the TWAG local network resource release operation process is paralleled with the process of sending the above request message to the AC/BNG, thereby improving system efficiency. Of course, the TWAG may also perform a network resource release operation according to the request message when the above request message is sent to the AC/BNG. Preferably, the request message or the response message may be a CoA (Change-of-Authorization)/DM (Disconnect Message) message, or an AS (Abort-Session) command (instruction), etc. . The foregoing message actually includes a request message and a response message, that is, the CoA includes a CoA-Request/CoA-Response, the DM includes a Disconnect-Request/Disconnect-Response, and the AS includes an ASR (Abort-Session-Request, a terminal session request)/ASA. (Abort-Session-Answer, terminal session response). Corresponding to the above-mentioned resource release method, in the present embodiment, a resource release device is provided, which may be located in the TWAG, and is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used hereinafter, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and conceivable. FIG. 4 is a structural block diagram of a resource release apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes: a determining module 42 and a first sending module 44. Each module is described in detail below. The determining module 42 is configured to determine that network resource release is required. The first sending module 44 is connected to the determining module 42 and configured to send a request message to the AC/BNG, where the request message is used to notify the AC/BNG to perform network resource release. In this embodiment, the TWAG, in the case that the determining module 42 determines that it needs to release the network resources, the first sending module 44 notifies the AC/BNG to release the network resources, so that the AC/BNG knows the time for releasing the network resources in time. Compared with the related technology, the method of using the timer timeout to release the network resources can release the network resources in a timely manner, eliminating the time taken by the network resources to be invalid, and solving the network release method of the AC/BNG resources in the related art. The problem of invalid use of resources has improved the efficiency of the use of network resources. FIG. 5 is a block diagram of a preferred structure of a resource release apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus may further include: a first receiving module 52 connected to the first sending module 44, configured to receive from the AC/ The response message of the BNG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed. FIG. 6 is a block diagram showing a preferred structure of the determining module 42 according to an embodiment of the present invention. As shown in FIG. 6, the determining module is shown in FIG.

42 may include a receiving unit 422 configured to receive a detach request from the PDN-GW/GGSN, or set to receive a terminal deregistration request from the HSS/AAA. FIG. 7 is a block diagram of a preferred structure of a resource release apparatus according to an embodiment of the present invention. As shown in FIG. 7, the apparatus may further include: a first processing module 72 connected to the determining module 42 and configured to perform a network resource release operation. In this embodiment, another resource release method is also provided. FIG. 8 is a flowchart of another resource release method according to an embodiment of the present invention. As shown in FIG. 8, the method includes the following steps: Step S802, The AC/BNG receives the request message from the TWAG, where the request message is used to notify the AC/BNG to perform network resource release; Step S804, the AC/BNG performs a network resource release operation according to the request message. In this embodiment, the AC/BNG receives the request message that the TWAG notifies the AC/BNG to release the network resource, and performs the network resource release operation according to the request message, so that the AC/BNG knows the time for releasing the network resource in time. Compared with the related technology, the method of using the timer timeout to release the network resources can release the network resources in a timely manner, eliminating the time taken by the network resources to be invalid, and solving the network release method of the AC/BNG resources in the related art. The problem of invalid use of resources has improved the efficiency of the use of network resources. Preferably, after the AC/BNG performs the network resource release operation according to the request message, the response message may also be sent to the TWAG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed. In this way, the TWAG can know that the AC/BNG has completed the network resource release operation and improves the system reliability. Preferably, the request message or the response message may be a CoA (Change-of-Authorization)/DM (Disconnect Message) message, or an AS (Abort-Session) command (instruction), etc. . The foregoing message actually includes a request message and a response message, that is, the CoA includes a CoA-Request/CoA-Response, the DM includes a Disconnect-Request/Disconnect-Response, and the AS includes an ASR (Abort-Session-Request, a terminal session request)/ASA. (Abort-Session-Answer, terminal session response). Corresponding to the other resource release method described above, another resource release device is provided in the embodiment, the device may be located in the AC/BNG, and FIG. 9 is another resource release device according to an embodiment of the present invention. Structure Block Diagram As shown in FIG. 9, the apparatus includes: a second receiving module 92 and a second processing module 94. Each module will be described in detail below. The second receiving module 92 is configured to receive a request message from the TWAG, where the request message is used to notify the AC/BNG to perform network resource release. The second processing module 94 is connected to the second receiving module 92, and is configured to be configured according to the The request message received by the receiving module 92 performs a network resource release operation. In this embodiment, the AC/BNG receives the TWAG notification through the second receiving module 92 through the above module.

The AC/BNG performs a network resource release request message, and performs a network resource release operation according to the request message by the second processing module 94, so that the AC/BNG knows the time for releasing the network resource in time, compared with the related art. When the timeout is used to release the network resources, the network resources can be released in a timely manner, and the time taken for the invalid use of the network resources is eliminated, and the problem that the resource release mode of the AC/BNG in the related art causes the invalid use of the network resources is solved, and the problem is improved. The efficiency of the use of network resources. FIG. 10 is a block diagram of a preferred structure of another resource release device. As shown in FIG. 10, the device may further include: a second sending module 102 connected to the second processing module 94 and configured to be TWAG Sending a response message, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed. The following description will be made in conjunction with the preferred embodiments, and the following preferred embodiments incorporate the above-described embodiments and preferred embodiments thereof. In the following embodiments, a method and system for detaching a terminal triggered by a network side when a UE moves to a core network through non-3GPP is mainly provided. Through this solution, network resources on the AC/BNG can be released in time, so that the release of network resources on the AC/BNG can only be completed by timer timeout, which increases the problem of invalid use of network resources. Strengthen the effective use of network resources. 11 is a flowchart 1 of a method for detaching a terminal according to a first embodiment of the present invention. As shown in FIG. 11, the route optimization method according to the preferred embodiment 1 includes the following steps: Step S1102, PDN-GW/GGSN A detach request is sent to the TWAG. Step S1104: After receiving the detach request, the TWAG may release the network resource on the DMAG, and at the same time (or before, after) may send a disconnect request message to the AC/BNG. Step S1106: After receiving the disconnection request message, the AC/BNG may trigger a resource release procedure of the access network on the terminal, the AP/RG, and the AC/BNG. In step S1108, the AC/BNG returns a disconnection response to the TWAG. The disconnection message in step S1104 and in this step may be a CoA /DM message, or may be an ASR/AS A command. Step S1110, after the TWAG receives the disconnection response and completes the release of the network resource,

The PDN-GW/GGSN sends a detach response message. In step S1112, the PDN-GW/GGSN updates the PDN-GW address to the AAA/HSS. The PCEF on the PDN-GW/GGSN then initiates an IP-CAN session termination procedure to the PCRF. Embodiment 2 FIG. 12 is a flowchart 2 of a method for detaching a terminal according to Embodiment 2 of the present invention. As shown in FIG. 12, the route optimization method according to the preferred embodiment includes the following steps: Step S1202: The HSS/AAA sends a terminal deregistration request to the TWAG to notify the access network to perform the detach process. In step S1204, the TWAG sends a delete session request to the PDN-GW/GGSN. This step does not depend on the trigger of step S1202 and can be performed independently. In step S1206, the TWAG may send a disconnection request message to the AC/BNG while transmitting (or before and after) the delete session request. Step S1208: After receiving the disconnection request message, the AC/BNG may trigger a resource release procedure of the access network on the terminal, the AP/RG, and the AC/BNG. In step S1210, the AC/BNG returns a disconnection response to the TWAG. The disconnection message in step S1206 and in this step may be a CoA/DM message or an ASR/ASA command. In step S1212, the PDN-GW/GGSN updates the PDN-GW address to the AAA/HSS. The PCEF function on the PDN-GW/GGSN then initiates an IP-CAN session termination procedure to the PCRF. This step can be performed independently after receiving step S1202, and does not need to wait for steps S1206 to S1210 to be completed. Step S1214, the PDN-GW/GGSN sends a delete session response message to the TWAG. Step S1216, if there is step S1202, the TWAG may return a terminal to the AAA/HSS to register the response. In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments. In another embodiment, a storage medium is also provided, the software being stored, including but not limited to an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A method of resource release, comprising:

The TWAG determines that the network resource is required to be released. The TWAG sends a request message to the access controller AC/broadband network gateway BNG, and the request message is used to notify the AC/BNG to release the network resource.

The method according to claim 1, wherein after the TWAG sends the request message to the AC/BNG, the method further includes:

The TWAG receives a response message from the AC/BNG, wherein the response message is used to indicate that the network resource release operation of the AC/BNG is completed.

3. The method according to claim 1, wherein the TWAG determines that the network resource release is required to be included: the TWAG receives a detach request from the packet data network gateway PDNGW/Gateway General Packet Radio Service Support Node GGSN; or

The TWAG receives a terminal deregistration request from the home subscriber server HSS/authentication authorization and accounting server AAA.

The method according to any one of claims 1 to 3, wherein before the TWAG sends a request message to the AC/BNG, the method further includes:

The TWAG performs a network resource release operation.

The method according to any one of claims 1 to 4, wherein the request message/response message is one of the following: an authorization change CoA message, a disconnection message DM, a terminal session AS instruction.

6. A method of resource release, comprising:

The access controller AC/broadband network gateway BNG receives the request message from the trusted WLAN access gateway TWAG, wherein the request message is used to notify the AC/BNG to perform network resource release;

The AC/BNG performs a network resource release operation according to the request message.

The method according to claim 6, wherein after the AC/BNG performs the network resource release operation according to the request message, the method further includes: The AC/BNG sends a response message to the TWAG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed.

The method according to claim 6 or 7, wherein the request message/response message is one of the following: an authorization change CoA message, a disconnection message DM, a terminal session AS instruction.

9. A resource release device, located in the credit WLAN access gateway TWAG, comprising:

Determining the module, setting to determine that network resource release is required;

The first sending module is configured to send a request message to the access controller AC/broadband network gateway BNG, where the request message is used to notify the AC/BNG to perform network resource release.

10. The device according to claim 9, wherein the device further comprises:

The first receiving module is configured to receive a response message from the AC/BNG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed.

The device according to claim 9, wherein the determining module comprises:

The receiving unit is configured to receive the detach request from the packet data network gateway PDNGW/Gateway General Packet Radio Service Support Node GGSN; or, to receive the terminal from the Home Subscriber Server HSS/Authentication Authorization and Accounting Server AAA Registration request.

The device according to any one of claims 9 to 11, wherein the device further comprises:

The first processing module is configured to perform a network resource release operation.

13. A resource release device, located in the Access Controller AC/Broadband Network Gateway BNG, comprising:

a second receiving module, configured to receive a request message from the trusted WLAN access gateway TWAG, where the request message is used to notify the AC/BNG to perform network resource release;

The second processing module is configured to perform a network resource release operation according to the request message.

The device according to claim 13, wherein the device further comprises:

The second sending module is configured to send a response message to the TWAG, where the response message is used to indicate that the network resource release operation of the AC/BNG is completed.