WO2014063548A1

WO2014063548A1 - Method for triggering self-exchange in internet protocol multimedia subsystem architecture, apparatus and system thereof

Info

Publication number: WO2014063548A1
Application number: PCT/CN2013/083909
Authority: WO
Inventors: 郭金卫; 张伟; 任革林; 杨恒占; 彭骞
Original assignee: 华为技术有限公司
Priority date: 2012-10-25
Filing date: 2013-09-22
Publication date: 2014-05-01
Also published as: CN102916962A; CN102916962B

Abstract

The present invention relates to a method for triggering self-exchange in internet protocol multimedia subsystem (IMS) architecture, the method comprising: sending a user registering message to an interrogating call session control function (I-CSCF) by an access gateway control function (AGCF). An identifier is carried by the registering message, for indicating the self-exchange capacity supported by the AGCF. A registering failure response message sent by the I-CSCF is received, and self-exchange is triggered according to the identifier for indicating self-exchange triggering in the registering failure response message. Accordingly, an apparatus and system for self-exchange in IMS architecture is provided by the present invention. The problem of being incapable of triggering self-exchange by the AGCF is resolved, after the user registering failure, and the stability of the system is enhanced.

Description

Trigger method, device and system for self-exchange under IMS architecture

This application claims the priority of the Chinese application filed on October 25, 2012, with the application number 201210413069.8, the invention is entitled "A method, device and system for self-exchange under IMS architecture", the entire contents of which are incorporated by reference. In this application. Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a method and an apparatus for processing self-switching in an IMS architecture. Background technique

IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) is a subsystem supporting IP multimedia services proposed by 3GPP (3rd Generation Partnership Project) in the Release 5 version standard. It is established in Session Initiation Protocol (Session). Based on Initial Protocol (SIP), it is a system that combines data, voice and mobile networks. From the perspective of the network architecture, the IMS is a network superimposed on the original circuit domain and the packet domain. The signaling and user data are carried over the packet domain, and the interworking with the original circuit domain can be realized. Network, referred to as: NGN) is the most important component.

Access Gateway Control Function (AGCF) is a network element of the IMS network. It controls access to traditional POTS and integrated services digital network (ISDN) users to access IMS through protocols such as H.248. Enjoy the services provided by IMS in the network. The Interrogating Call Session Control Function (I-CSCF) is located in the home network of the user and is a unified entry point of the home network. It is responsible for allocating or querying the Serving Call Session Control Function (Serving Call Session Control Function). S-CSCF). The S-CSCF is located in the home network and is the central node of the IMS network. It is responsible for user registration, authentication, session, routing, and service triggering.

The AGCF completes the user registration and call function with the I-CSCF and the S-CSCF in the IMS network. When the I-CSCF or S-CSCF fails or the connection between the AGCF and the I-CSCF/S-CSCF is interrupted, the user managed by the AGCF cannot initiate registration and call to the I-CSCF/S-CSCF, and all AGCF-managed user calls fail.

In the prior art, if the AGCF call fails, the self-switching disaster recovery mechanism needs to be triggered. If the I-CSCF fails or the connection is interrupted, the user cannot register, so the call cannot be made, the AGCF triggers the self-exchange, or the I-CSCF is reachable normally. If the S-CSCF registered by the user is unreachable, the call cannot be made as well, and the AGCF triggers the self-exchange. Users who are within the scope of the AGCF from the exchange can make calls, and users who are not within the scope of the AGCF cannot make calls.

For the scenario where the I-CSCF is normally reachable, and all S-CSCFs are unreachable due to failure or connection interruption, because the S-CSCF is the capability set or I-CSCF selected by the I-CSCF through the HSS when the user registers, when When the registration fails, the AGCF does not know whether the available S-CSCF fails or fails for other reasons. It is not possible to determine whether the self-switching disaster recovery mechanism needs to be triggered. Summary of the invention

In view of this, the embodiment of the present invention provides a triggering method, device, and system for self-switching under the IMS architecture, which solves the problem that the AGCF cannot trigger self-switching after the user fails to register, and improves the stability of the system.

In a first aspect, the embodiment of the present invention provides a triggering method for self-switching in an IMS architecture, including: an access gateway control function, an AGCF, a user registration message, and an inquiry call session control function.

An I-CSCF, where the registration message carries an identifier for indicating that the AGCF supports self-switching capability;

The registration failure response message sent by the I-CSCF is received, and the self-exchange is triggered according to the identifier carried in the registration failure response message for indicating the triggering of the self-exchange.

In a first possible implementation manner of the first aspect, before sending the user registration message to the query call session control function I-CSCF, the method further includes:

The AGCF encapsulates the identifier used to indicate that the AGCF supports self-switching capability. The registration message.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, before the receiving the registration failure response message sent by the I-CSCF, the method further includes: the I-CSCF Receiving, by the AGCF, a registration message, and determining, according to the identifier used to indicate that the AGCF supports self-switching capability, the AGCF supports self-switching;

After the user fails to register, the I-CSCF adds the identifier for indicating the triggering self-exchange to the registration failure response message.

In a second aspect, the embodiment of the present invention provides an access gateway control function AGCF, including: a sending unit, configured to send a user registration message to the query call session control function I-CSCF, where the registration message is used to indicate the AGCF support Identification of self-exchange capabilities;

a receiving unit, configured to receive a registration failure response message sent by the I-CSCF;

The triggering unit is configured to trigger the self-exchange according to the identifier carried in the registration failure response message for indicating the triggering of the self-exchange.

In a first possible implementation manner of the second aspect, the AGCF further includes: an encapsulating unit, configured to encapsulate the identifier for indicating that the AGCF supports self-switching capability into the registration message.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation, the identifier used to indicate that the AGCF supports the self-switching capability is specifically used in the registration message. The parameters of the Supported header field are represented;

The identifier used to indicate that the self-switching is triggered is specifically used in the registration failure response message.

The parameter of the Require header field indicates, or the identifier used to indicate the triggering self-exchange is specifically represented by the cause value of the specific failure.

In a third aspect, the embodiment of the present invention provides a self-switching system under the IMS architecture, including an access gateway control function AGCF and an inquiry call session control function I-CSCF, where

The AGCF is configured to send a user registration message to the I-CSCF, where the registration message carries an identifier for indicating that the AGCF supports self-switching capability; and receives a note sent by the I-CSCF. The failure response message is triggered according to the identifier carried in the registration failure response message for indicating the triggering of the self-exchange;

The I-CSCF is configured to send a registration failure response message to the AGCF, where the registration failure response message carries an identifier for indicating triggering the self-exchange.

In a first possible implementation manner of the third aspect, before the sending, by the AGCF, the user registration message to the query call session control function I-CSCF, the method further includes:

The AGCF encapsulates the identifier for indicating that the AGCF supports self-switching capability into the registration message.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation, before the receiving the registration failure response message sent by the I-CSCF, the method further includes: the I-CSCF Receiving, by the AGCF, a registration message, and determining, according to the identifier used to indicate that the AGCF supports self-switching capability, the AGCF supports self-switching;

The method, device and system for triggering self-switching provided by the embodiment of the present invention, the AGCF sends a registration message carrying the AGCF support self-switching capability identifier to the I-CSCF, and the I-CSCF sends a registration response failure message carrying the triggered self-switching identifier. To AGCF, the AGCF is triggered to perform self-exchange, which solves the problem that the AGCF cannot determine whether to trigger self-switching after the user fails to register, and improves the stability of the system. DRAWINGS

FIG. 1 is a structural diagram of an application environment according to an embodiment of the present invention;

2 is a flowchart of Embodiment 1 of the present invention;

Figure 3 is a flowchart of Embodiment 2 of the present invention;

4 is a composition diagram of AGCF in Embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of an AGCF hardware in Embodiment 3 of the present invention; FIG. FIG. 6 is a system architecture diagram of Embodiment 4 of the present invention. detailed description

1 is an application environment architecture diagram of an embodiment of the present invention. The application environment of the embodiment of the present invention is an IMS architecture, and an access gateway control function (AGCF) is a network element of an IMS network, and passes through H.248. The protocol control accesses the traditional POTS and integrated services digital network (ISDN) users to access the IMS network and enjoy the services provided by the IMS. The Interrogating Call Session Control Function (I-CSCF) is located in the home network of the user and is a unified entry point of the home network. It is responsible for allocating or querying the Serving Call Session Control Function (Serving Call Session Control Function). S-CSCF). The S-CSCF is located in the home network and is the central node of the IMS network. It is responsible for user registration, authentication, session, routing, and service triggering.

The method disclosed in the foregoing embodiments of the present invention may be implemented in a central processing unit or a central processing unit. The central processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in a central processing unit or an instruction in a form of software. For performing the method disclosed in the embodiments of the present invention, the central processing unit may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic. Devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory, and the central processor reads the information in the memory, and combines the hardware to complete the steps of the foregoing method. Embodiment 1:

As shown in FIG. 2, the process of self-switching triggering in the embodiment of the present invention is as follows:

S101, the access gateway control function, the AGCF sends a user registration message to the query call session control function I-CSCF, where the registration message carries an indicator for indicating that the AGCF supports the self-switching capability;

Before the AGCF sends the user registration message to the I-CSCF, the AGCF encapsulates the identity indicating that the AGCF supports the self-switching capability into the registration message.

Since the interaction between the AGCF and the I-CSCF is performed through the Session Initiation Protocol (SIP), the identifier can be represented by the parameter of the Supported header field in the user registration message, and the Supported header field is in the SIP. The protocol is specifically used to describe and define which SIP extensions.

The identifier for indicating that the AGCF supports the self-switching capability is specifically represented by a parameter of a Supported header field in the registration message;

Require the parameters of the header field to indicate, or use the cause value of the specific failure. The Require header field is specifically used to describe what kind of extended identifier is needed to process the specific request, and the cause value of the specific failure may be represented by the Q.850 cause value in the embodiment of the present invention.

S102. Receive a registration failure response message sent by the I-CSCF, and trigger the self-exchange according to the identifier carried in the registration failure response message for indicating the triggering self-exchange.

The I-CSCF receives the registration message sent by the AGCF, and determines that the AGCF supports self-switching according to the identifier used to indicate that the AGCF supports the self-switching capability;

The method for triggering self-switching provided by the embodiment of the present invention, the AGCF sending carrying support

The AGCF supports the registration message from the exchange capability identifier to the I-CSCF, and the I-CSCF sends the bearer The registration response failure message sent from the exchange identifier to the AGCF triggers the AGCF to perform self-exchange, which solves the problem that the AGCF cannot determine whether to trigger the self-switching after the user registration fails, thereby improving the stability of the system. Embodiment 2:

FIG. 3 is a flowchart of an embodiment of the present invention. As shown in FIG. 3, the flow of the embodiment of the present invention is as follows: The embodiment of the present invention is applicable to a scenario in which the I-CSCF is normal in the IMS architecture, but the user registration fails.

S201. The AGCF initiates a user registration request message to the I-CSCF.

If the AGCF supports the self-switching, the AGCF sends a user registration request to the I-CSCF, and carries an identifier for indicating that the AGCF supports the self-switching capability, and the identifier is added by the AGCF to the Supported header field of the registration request. In the embodiment of the present invention, the specific form of the identifier is not limited, for example, it can be represented by a custom parameter "selfswitch", and the specific form of the identifier in the registration request message may be:

REGISTER sip:icscf.homel .com SIP/2.0

Supported: path, selfswitch If the AGCF does not support self-switching, you do not need to carry the identifier.

S202. The I-CSCF parses the user registration request message.

After receiving the registration request, the I-CSCF parses the request message. In the example above, the I-CSCF determines that the AGCF supports self-switching according to the "selfswitch" parameter carried in the registration request message. If the "selfswitch" parameter is not carried in the registration request message, the I-CSCF determines that the AGCF does not support self-switching.

S203. The I-CSCF sends a registration failure response message.

In the embodiment of the present invention, after the I-CSCF parses the user registration request, the S-CSCF In conjunction with the HSS, in the embodiment of the present invention, the focus is on the interaction between the I-CSCF and the S-CSCF. If the I-CSCF fails to interact with the S-CSCF, the user registration fails. The I-CSCF adds an identifier for triggering the self-switching to the registration failure response message, and sends the failure response message to the AGCF. The I-CSCF may add the identifier of the triggering self-switching in the Require header field of the registration failure response. The embodiment of the present invention has no limitation on the specific form of the identifier that triggers the self-switching, and may be represented by "selfswitch" or a specific one. The failure cause value is expressed, for example, the Q.850 cause value. It should be noted that the identifier of the self-switching is indicated by "selfswich", which is the same as the identifier form used in the above example to indicate that the AGCF supports the self-switching capability, but the meanings of the two are different, and one is The parameters of the Supported header field, and the other are the parameters of the Require header field.

If the I-CSCF determines in the S202 that the AGCF does not support the self-switching, it does not need to add the trigger to the registration failure response message, but directly sends the registration failure response message to the AGCF.

S204, AGCF trigger self-switching.

The AGCF triggers a self-switching on the call according to the identifier used to trigger the self-exchange in the registration failure response message.

In the method for triggering self-switching provided by the embodiment of the present invention, the AGCF sends a registration message carrying the identity of the self-switching capability supported by the AGCF to the I-CSCF, and the I-CSCF sends a registration response failure message carrying the triggered self-switching identifier to the AGCF, triggering The AGCF performs self-exchange, which solves the problem that the AGCF cannot determine whether to trigger self-switching after the user registration fails, and improves the stability of the system. Embodiment 3:

Figure 4 is a structural diagram of the AGCF. As shown in Figure 4, the AGCF includes:

The sending unit 301 is configured to send a user registration message to the query call session control function.

An I-CSCF, where the registration message carries a flag indicating that the AGCF supports self-switching capability Knowledge

Before the sending unit 301 sends the user registration message to the I-CSCF, the encapsulation unit of the AGCF will be used to instruct the AGCF to support the self-switching capability to be encapsulated into the registration message.

The receiving unit 302 is configured to receive a registration failure response message sent by the I-CSCF. Before the receiving unit 302 receives the registration failure response message, the I-CSCF receives the registration message sent by the AGCF, according to the indication, the AGCF is used to support Judging from the identity of the switching capability, the AGCF supports self-switching;

The triggering unit 303 is configured to trigger the self-switching according to the identifier carried in the registration failure response message for indicating triggering the self-exchange.

5 is a hardware architecture diagram of an AGCF according to another embodiment of the present invention, including at least one processor 401 (eg, a CPU), at least one peripheral interface 402 or other communication interface, a memory 403, a switch interface 404, and at least one communication. A bus 405 is used to implement connection communication between these devices. The processor 401 is configured to execute an executable module, such as a computer program, stored in the memory 403. Memory 403 may contain high speed random access memory (RAM: Random Access Memory ) may also include non-volatile, non-volatile memory, such as at least one disk storage. The communication connection between the system gateway and at least one other network element is implemented by at least one peripheral interface 402 (which may be wired or wireless), and may use an Internet, a wide area network, a local network, a metropolitan area network, or the like.

In some embodiments, the memory 403 stores program instructions, which may be executed by the processor 401, where the program instructions include a sending unit 301, a receiving unit 302, and a triggering unit 303, wherein specific implementations of the units are shown in FIG. The corresponding units disclosed are not described here.

In the AGCF that triggers self-switching, the sending unit sends a registration message carrying the self-switching capability identifier supported by the AGCF to the I-CSCF, and the I-CSCF sends a registration response failure message carrying the triggered self-switching identifier to the AGCF. The receiving unit triggers the self-switching to solve the problem that the AGCF cannot determine whether to trigger the self-switching after the user fails to register, thereby improving the stability of the system. Embodiment 4:

Figure 6 is a structural diagram of the system. As shown in Figure 6, the system includes AGCF501 and I-CSCF502, where

The AGCF 501 is configured to send a user registration message to the I-CSCF, where the registration message carries an identifier for indicating that the AGCF supports the self-switching capability, and receives a registration failure response message sent by the I-CSCF, according to the The identifier carried in the registration failure response message is used to indicate the triggering of the self-exchange, and the self-switching is triggered;

Since the interaction between the AGCF and the I-CSCF is performed through the Session Initiation Protocol (SIP), the identifier can be represented by the parameter of the Supported header field in the user registration message, and the Supported header field is in the SIP. In the agreement, specific Used to describe and define which SIP extensions.

The identifier for indicating the triggering self-exchange is specifically represented by a parameter of a Require header field in the registration failure response message, or by a cause value of a specific failure. The Require header field is specifically used to describe what kind of extended identifier is needed to process the specific request, and the cause value of the specific failure may be represented by the Q.850 cause value in the embodiment of the present invention.

The I-CSCF 502 is configured to send a registration failure response message to the AGCF, where the registration failure response message carries an identifier for indicating triggering the self-exchange.

In the system for triggering self-switching provided by the embodiment of the present invention, the AGCF sends a registration message carrying the identity of the self-switching capability supported by the AGCF to the I-CSCF, and the I-CSCF sends a registration response failure message carrying the triggered self-switching identifier to the AGCF, triggering The AGCF performs self-exchange, which solves the problem that the AGCF cannot determine whether to trigger self-switching after the user registration fails, and improves the stability of the system.

Through the description of the above embodiments, it will be apparent to those skilled in the art that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or capable of Any other medium used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwaves are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the protection hierarchy of computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the protection level of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

claims

1. A method for triggering self-switching under the IMS architecture, which is characterized by including: the access gateway control function AGCF sends a user registration message to the query call session control function I-CSCF, and the registration message carries a message indicating that the AGCF supports the identification of self-exchange capabilities;

Receive the registration failure response message sent by the I-CSCF, and trigger the self-switching according to the identifier carried in the registration failure response message to indicate triggering the self-switching.

2. The method according to claim 1, characterized in that before sending the user registration message to query the call session control function I-CSCF, the method further includes:

The AGCF encapsulates the identifier used to indicate that the AGCF supports self-switching capability into the registration message.

3. The method according to claim 1 or 2, characterized in that before receiving the registration failure response message sent by the I-CSCF, the method further includes:

The I-CSCF receives the registration message sent by the AGCF, and determines that the AGCF supports self-switching based on the identifier indicating that the AGCF supports self-switching capability;

When the user registration fails, the I-CSCF adds the identifier used to indicate triggering self-exchange into the registration failure response message.

4. The method according to any one of claims 1 to 3, characterized in that,

The identifier used to indicate that the AGCF supports self-switching capability is specifically represented by the parameters of the Supported header field in the registration message;

The identifier used to indicate triggering self-exchange is specifically represented by the parameters of the Require header field in the registration failure response message, or the identifier used to indicate triggering self-exchange is specifically represented by a specific failure reason value.

5. An access gateway control function AGCF, which is characterized by including:

A sending unit, configured to send a user registration message to the query call session control function I-CSCF, where the registration message carries an identifier indicating that the AGCF supports self-switching capability; The receiving unit is used to receive the registration failure response message sent by the I-CSCF;

A triggering unit, configured to trigger self-switching according to an identifier carried in the registration failure response message for indicating triggering self-switching.

6. The access gateway control function AGCF according to claim 5, characterized in that the AGCF further includes:

An encapsulation unit, configured to encapsulate the identification indicating that the AGCF supports self-switching capability into the registration message.

7. The access gateway control function AGCF according to claim 5 or 6, characterized in that, the identifier used to indicate that the AGCF supports self-switching capability is specifically determined by parameters of the Supported header field in the registration message. express;

8. A self-switching system under the IMS architecture, characterized by including an access gateway control function AGCF and an inquiry call session control function I-CSCF, where,

The AGCF is configured to send a user registration message to the I-CSCF, where the registration message carries an identifier indicating that the AGCF supports self-switching capabilities; receive a registration failure response message sent by the I-CSCF, according to the The identifier carried in the registration failure response message is used to indicate triggering self-exchange, triggering self-exchange;

The I-CSCF is configured to send a registration failure response message to the AGCF, where the registration failure response message carries an identifier used to indicate triggering self-switching.

9. The system according to claim 8, characterized in that, before the AGCF sends the user registration message to the query call session control function I-C SCF, it also includes:

10. The system according to claim 8 or 9, characterized in that, the receiving I-CSCF Before the registration failure response message is sent, it also includes: