WO2012155769A1 - Method and system for s-cscf disaster recovery rewinding - Google Patents

Abstract

Disclosed is a method for serving call session control function disaster recovery rewinding, comprising: when receiving a registration message of a user, an interrogating call session control function (I-CSCF) with a rewinding function initiated interrogating initial configuration information of the user through an HSS; forwarding the registration message to a serving call session control function (S-CSCF) initially configured by the user; the S-CSCF performing authentication and authentication on the user through the HSS, performing registration authentication on the I-CSCF after passing the authentication and authentication, so that the user accesses the S-CSCF. Also disclosed is a system for serving call session control function disaster recovery rewinding that implements the above method. The rewinding method of the present invention does not need deregistration of the user, does not need the S-CSCF to notify the user of performing rewinding, and can implement S-CSCF rewinding automatically, thereby having advantages of simple implementation steps and short operation time.

Description

 Method and system for reversing S-CSCF disaster recovery recovery

 The present invention relates to a reversing redundancy technology in an IP Multimedia Subsystem (IMS, IP Multimedia Subsystem), and more particularly to a method for recovering and recovering disaster recovery of a service call session control function (S-CSCF) and system. Background technique

 The IP Multimedia Subsystem (IMS) is a standard for next-generation networks defined by the 3rd Generation Partnership Project (3GPP). Its distinctive feature is the use of the Session Initiation Protocol (SIP). The system, communication and access have nothing to do, can have multiple media service control functions and bearer separation, call and session separation, application and service separation, service and network separation, and mobile network and Internet service integration and other capabilities.

 The proposal of IMS complies with the trend of communication network convergence development. FIG. 1 is a schematic diagram of an existing IMS network architecture. As shown in FIG. 1, the main functional entities in the IMS system include: a Proxy call session control function (P-CSCF), and an access gateway control function entity ( AGCF, Access Gateway Control Function, I-CSCF, Interrogating call session control Function, S-CSCF, Serving call session control Function, (HSS, Home subscriber Server) Network architecture. The connection between the network elements can be as shown in Figure 1. The functions of the network elements and their connection relationships are all in the prior art. The functions of the network elements and their connection relationships are not mentioned here. The above NE functions and their connection relationships can be found in the relevant standards of the IMS system.

In order to improve the level of operation, operators must provide users with high-quality, uninterrupted service. The S-CSCF network element of the current service is unavailable because the version is upgraded or the device is faulty. The network needs to provide an effective DR mechanism to switch services to other available devices as much as possible to minimize user service loss. After the S-CSCF version is upgraded or the fault is rectified, you need to migrate the user service to the original S-CSCF device in time to reduce the load on other devices.

 In the prior art, after the user selects the new S-CSCF and registers, the information of the newly used S-CSCF will be saved in the HSS, and the services of the subsequent users will continue to access the newly used S-CSCF device. After the faulty S-CSCF is restored or updated, the user cannot use the restored or updated S-CSCF device because the S-CSCF information stored in the HSS has not changed. Only after the user issues the logout message, the initial configuration of the user is restored on the HSS, and the restored or updated S-CSCF can be reselected when the user re-registers. At present, the user actively cancels or informs the user of the cancellation by the S-CSCF, and when the number of access users is large, the operation time is long and the steps are complicated. Summary of the invention

 In view of the above, the main purpose of the present invention is to provide a method and system for disaster recovery recovery of a service call session control function entity, which can resolve the S-CSCF recovery function of a fault or update operation, and then the user reverts back to the S-CSCF. The problem of inefficiency.

 In order to achieve the above object, the technical solution of the present invention is achieved as follows:

 A method for the service call session control function entity disaster recovery recovery reversal, comprising: initiating a reversal function querying the call session control function entity I-CSCF, when receiving a registration message of the user, querying the initial configuration information of the user by using the HSS And forwarding the registration message to the service call session control function entity S-CSCF initially configured by the user;

 The S-CSCF performs authentication authentication on the user by using the HSS, and after the authentication is authenticated, the authentication is performed to the I-CSCF, so that the user accesses the S-CSCF.

 Preferably, the S-CSCF is a faulty or updated S-CSCF; the method further includes:

After the S-CSCF is restored, the rewind function of the I-CSCF is started. Preferably, the method further includes:

 Determining, by the HSS, that the redundant S-CSCF accessed by the user before the fault or the update is returned to the S-CSCF, notifying the redundant S-CSCF to terminate the registration with the user;

 The redundant S-CSCF clears registration information of the user.

 Preferably, the method further includes:

 The I-CSCF determines that all users on the S-CSCF are turned back and then turns off their own rewind function.

 Preferably, the method further includes:

 After the S-CSCF is faulty, the user accessing the S-CSCF registers with the redundant S-CSCF and maintains the current service of the user.

 Preferably, the initial configuration information includes the initial configuration server name Server-Name and/or server performance Server-Capability attribute information of the user.

 A system for a service call session control function entity disaster recovery recovery, including an HSS, an I-CSCF, and an S-CSCF; the system further includes:

 a startup unit, configured to start a rewind function of the I-CSCF;

 The I-CSCF is configured to: when the registration message of the user is received, query the initial configuration information of the user by using the HSS; and forward the registration message to the S-CSCF initially configured by the user;

 The S-CSCF is configured to authenticate the user by using the HSS, and after the authentication is passed, perform registration authentication on the I-CSCF, so that the user accesses the S-CSCF.

 Preferably, the S-CSCF is a faulty or updated S-CSCF;

 The initiating unit is further configured to start a rewind function of the I-CSCF after the S-CSCF is restored.

 Preferably, the system further includes: a redundant S-CSCF;

The HSS is further configured to: when the user returns to the S-CSCF from a faulty or pre-updated redundant S-CSCF, notify the redundant S-CSCF to terminate registration with the user; The redundant S-CSCF is configured to clear registration information of the user.

 Preferably, the system further comprises:

 The closing unit is configured to: after determining that all users on the S-CSCF are backed up, turn off the rewinding function of the I-CSCF.

 In the present invention, after determining the S-CSCF recovery function of the fault or update operation, it is not necessary for the user to log out from the redundant S-CSCF, and the S-CSCF is not required to notify the user to logout, but to enable the rewind function of the I-CSCF. The I-CSCF is used to perform the logout operation on the accessed user, so that the user registered to the redundant S-CSCF is re-registered to the fault recovery S-CSCF, thereby achieving load balancing between the S-CSCFs. According to the technical solution of the present invention, after the I-CSCF is added with a new rewind function, after the fault is determined or the updated S-CSCF function is restored, the rewind function of the I-CSCF is started, and the user can be returned to the fault recovery. The operation of the S-CSCF does not require the user to logout, and the S-CSCF does not need to notify the user to perform the rewind. The S-CSCF rewind operation can be completed automatically, which has the advantages of simple implementation steps and short operation time. DRAWINGS

 Figure 1 is a schematic diagram of an existing IMS network architecture;

 FIG. 2 is a flowchart of the S-CSCF disaster recovery recovery reversal in the IMS according to the embodiment of the present invention. detailed description

The basic idea of the present invention is that, after determining the S-CSCF recovery function of the fault or update operation, it is not necessary for the user to log out from the redundant S-CSCF, and it is not necessary to use the S-CSCF to notify the user to logout, but to open the I-CSCF. The rewind function realizes the logout operation for the accessed user through the I-CSCF, so that the user registered to the redundant S-CSCF is re-registered to the fault recovery S-CSCF, thereby achieving load balancing between the S-CSCFs. According to the technical solution of the present invention, by adding a new rewind function to the I-CSCF, after determining the fault or the updated S-CSCF function recovery, the I-CSCF rewind function is started, and the user can be returned to the fault recovery. The operation of the S-CSCF. In the present invention, the rewind function of all I-CSCFs in the domain is first turned on.

 The user who has successfully registered on the P-CSCF/AGCF sends a registration message to the I-CSCF. The local I-CSCF receives the registration message sent by the user in the local domain, does not query the currently used S-CSCF information, but sends the information to the HSS. Query the attributes of the initial configuration of the user, such as Server-Name or Server-Capability; the I-CSCF uses the attribute information such as Server-Name or Server-Capability in the initial configuration information to enable the user to perform the initial registration process, and determine the available slaves. The S-CSCF recovered in the failure sends a registration message to the S-CSCF.

 After receiving the registration message, the S-CSCF performs corresponding initial registration processing on the user through the HSS.

 The HSS completes the registration process of the user in the failed recovery S-CSCF, and completes the logout work on other S-CSCFs according to the normal process.

 After the original access all users on the faulty S-CSCF are returned to the failed S-CSCF, all the I-CSCFs in the domain turn off the rewind function.

 The rewind function of the I-CSCF mainly means that, after the I-CSCF receives the registration message of the user who has successfully registered on the P-CSCF/AGCF, it does not directly register with the currently enabled S-CSCF. The S-CSCF information used in the initial configuration information of the user is queried by the HSS, so that the user registers with the S-CSCF used in the initial configuration information of the user, thereby realizing the user's rewind.

 The technical solutions of the present invention are further elaborated below in conjunction with specific examples.

 FIG. 2 is a flowchart of the S-CSCF disaster recovery recovery reversal in the IMS according to the embodiment of the present invention. As shown in FIG. 2, the S-CSCF disaster recovery recovery reversal method in the IMS is described in detail below with reference to FIG.

 The application environment of this example is that the user registers and uses the service service in the S-CSCF1 according to the initial registration policy; when the S-CSCF1 fails or needs to be upgraded, the user switches to the S-CSCF2 to register and use the service service; S-CSCF1 To recover from a failure, you need to return the service to the S-CSCF1.

The method for reversing the S-CSCF disaster recovery recovery in the example IMS includes the following steps: S202: Enable the rewind function of the I-CSCF.

 After the S-CSCF1 recovers from the fault and needs to revert the service back to the S-CSCF1, the I-CSCF rewind function is enabled. Here, the rewind function of the I-CSCF can be automatically turned on according to a certain policy, or can be turned on by the administrator through manual setting.

 S204. The user registered on the P-CSCF/AGCF initiates a registration request to the I-CSCF.

 S206. Because the I-CSCF starts the rewind function, the I-CSCF does not query the currently used S-CSCF information, but sends a user authorization request UAR to the HSS, where User-Authorization-Type=2, requires the HSS to return. Attribute information such as Server-Name or Server-Capability of the initial configuration.

 S208. The HSS returns a user authorization response message to the I-CSCF, where the user authorization response message includes information about an initial configuration of the user required by the I-CSCF.

 S210. The I-CSCF sends the user registration request to the fault recovery S-CSCF1 according to the Server-Name or Server-Capability information in the initial configuration information of the user.

 S212: After receiving the registration request of the user, the S-CSCF1 initiates a multimedia authentication request to the HSS to obtain corresponding authentication information.

 S214. The HSS returns the authentication information of the user.

 S216: After receiving the authentication information of the user returned by the HSS, the S-CSCF returns a 401 error code to the I-CSCF, and performs corresponding registration and authentication processing.

 S218, the HSS determines that the user is sent back to the S-CSCF1 by the S-CSCF2, and sends a registration termination request to the S-CSCF2.

 S220, after accepting the registration request, the S-CSCF2 clears the user related information, and returns a registration termination response to the HSS.

 S222: After all the users belonging to the S-CSCF1 are returned to the S-CSCF1, the rewind function of the I-CSCF is closed, thereby completing the rewinding process.

Only the main processes related to the implementation of the technical solution of the present invention are described in the figure, and other related processes are described. The processing flow is not related to the implementation of the technical solution of the present invention because it belongs to the prior art, and is omitted for convenience of description.

 By adopting the method of the invention, the user's service can be returned to the fault recovery S-CSCF network element without user logout, which has the advantages of simple operation and short influence time.

 The invention also describes a system for the service call session control function entity disaster recovery recovery, including the HSS, the I-CSCF and the S-CSCF; the system further includes:

 a startup unit, configured to start a rewind function of the I-CSCF;

 The I-CSCF is configured to: when the registration message of the user is received, query the initial configuration information of the user by using the HSS; and forward the registration message to the S-CSCF initially configured by the user;

 The S-CSCF is configured to authenticate the user by using the HSS, and after the authentication is passed, perform registration authentication on the I-CSCF, so that the user accesses the S-CSCF.

 The S-CSCF described above is a faulty or updated S-CSCF;

 The initiating unit is further configured to start a rewind function of the I-CSCF after the S-CSCF is restored.

 The system for the disaster recovery recovery of the service call session control function entity of the present invention further includes: a redundant S-CSCF;

 The HSS is further configured to: when the user returns to the S-CSCF from a faulty or pre-updated redundant S-CSCF, notify the redundant S-CSCF to terminate registration with the user;

 The redundant S-CSCF is configured to clear registration information of the user.

 The system of the service call session control function entity of the present invention further includes: a shutting down unit, configured to: after determining that all users on the S-CSCF are backed up, turning off the rewinding function of the I-CSCF.

The system for the disaster recovery recovery of the service call session control function entity in the embodiment of the present invention is implemented on the basis of the existing IMS system architecture, and the processing functions of the I-CSCF, the S-CSCF, and the HSS are improved. . Among them, the main functions of each network element and their connection relationship can be referred to. It is understood that the improved function of the above-mentioned network element can be understood by referring to the related description of the foregoing method for the service call session control function entity disaster recovery recovery.

 The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

 Industrial applicability

 According to the technical solution of the present invention, after determining the S-CSCF recovery function of the fault or the update operation, it is not necessary for the user to log out from the redundant S-CSCF, and the S-CSCF is not required to notify the user to logout, but to open the I-CSCF. The function is to perform the logout operation for the accessed user through the I-CSCF, so that the user registered to the redundant S-CSCF is re-registered to the fault recovery S-CSCF, thereby achieving load balancing between the S-CSCFs.

Claims

Claim  A method for a service call session control function entity disaster recovery recovery reversal, wherein the method comprises:  The inquiry call session control function entity I-CSCF that initiates the rewind function queries the initial configuration information of the user through the HSS when receiving the registration message of the user; and forwards the registration message to the service call session initially configured by the user. Control function entity S-CSCF;  The S-CSCF performs authentication authentication on the user by using the HSS, and after the authentication is authenticated, the authentication is performed to the I-CSCF, so that the user accesses the S-CSCF.  2. The method according to claim 1, wherein the S-CSCF is a S-CSCF that is recovered after a fault or an update; the method further includes:  After the S-CSCF is restored, the rewind function of the I-CSCF is started.  The method according to claim 1 or 2, wherein the method further comprises: the HSS determining that the user returns from the fault or the redundant S-CSCF accessed before the update back to the S-CSCF Notifying the redundant S-CSCF to terminate registration with the user;  The redundant S-CSCF clears registration information of the user.  4. The method according to claim 3, wherein the method further comprises:  The I-CSCF determines that all users on the S-CSCF are turned back and then turns off their own rewind function.  5. The method according to claim 4, wherein the method further comprises:  After the S-CSCF is faulty, the user accessing the S-CSCF registers with the redundant S-CSCF and maintains the current service of the user.  The method according to any one of claims 1 to 5, wherein the initial configuration information includes attribute information of a server name Server-Name and/or a server performance Server-Capability of the initial configuration of the user. 7. A system for service call session control function entity disaster recovery recovery, including HSS, The I-CSCF and the S-CSCF; wherein the system further includes:  a startup unit, configured to start a rewind function of the I-CSCF;  The I-CSCF is configured to: when the registration message of the user is received, query the initial configuration information of the user by using the HSS; and forward the registration message to the S-CSCF initially configured by the user;  The S-CSCF is configured to authenticate the user by using the HSS, and after the authentication is passed, perform registration authentication on the I-CSCF, so that the user accesses the S-CSCF.  8. The system according to claim 7, wherein the S-CSCF is a faulty or updated S-CSCF after updating;  The initiating unit is further configured to start a rewind function of the I-CSCF after the S-CSCF is restored.  The system according to claim 8 or 9, wherein the system further comprises: a redundant S-CSCF;  The HSS is further configured to: when the user returns to the S-CSCF from a faulty or pre-updated redundant S-CSCF, notify the redundant S-CSCF to terminate registration with the user;  The redundant S-CSCF is configured to clear registration information of the user.  10. The system according to claim 9, wherein the system further comprises:  The closing unit is configured to: after determining that all users on the S-CSCF are backed up, turn off the rewinding function of the I-CSCF.