WO2011140883A1

WO2011140883A1 - Method and system for logging off users

Info

Publication number: WO2011140883A1
Application number: PCT/CN2011/072880
Authority: WO
Inventors: 缪永生; 李世涛
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-10
Filing date: 2011-04-15
Publication date: 2011-11-17
Also published as: CN101820674A

Abstract

A method and a system for logging off users, which are applied to IP multimedia subsystems, are disclosed in present invention. In the method, a service call session control function (S-CSCF) receives a notification message indicating logging off users from an application server (AS), wherein the notification message carries a public user identifier (S302). The S-CSCF resolves the notification message and logs off users corresponding to the public user identifier (S304). According to the solution in present invention, a problem that logging off users actively by the S-CSCF in the related technology does not satisfy requirements of a third generation partnership project and operator based on operation maintenance and policy is solved, thus the requirements of operation maintenance and policy of the operator can be satisfied and the users experience is enhanced.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and system for canceling a user. BACKGROUND The IP Multimedia Subsystem (IMS) is a standard for the next generation network defined by the 3rd Generation Partnership Project (3GPP), and its remarkable feature is the use of a session. The initial protocol (Session Initiation Protocol, SIP for short) is independent of communication. It 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. A variety of capabilities, such as integration with Internet services.

The proposal of IMS complies with the trend of communication network convergence development. The main functional entities in the IMS system include: User Equipment (UE), Proxy call session control function (P-CSCF), and Interrogating call session. Control Function (referred to as I-CSCF), Serving call session control function (S-CSCF), Home Subscriber Server (HSS), and Application Server (Application Server, Referred to as AS), the network architecture is shown in Figure 1. The Public User Identity (PUI) is the user ID that the user communicates in the IMS network. If an IMS public user ID is to be used for the session, the user must first register. The registration process is to carry out the location on the network. After registration, after successful registration, the relevant user data will be saved on the P-CSCF, S-CSCF, AS, HSS for the session to use. A Subscribe / Notify mechanism allows a network entity to subscribe to certain resource information. When the resource information changes, the network entity responsible for the resource can notify the subscriber. After the registration is successful, the UE, the P-CSCF, and the AS will establish a subscription for the user registration status to the S-CSCF. After the user registration status is changed, the S-CSCF can notify the P-CSCF, UE, and AS through the Notify message to ensure the entire network. Data consistency. In the related art, a subscription/notification relationship established between a UE, a P-CSCF, an AS, and an S-CSCF, when the registration status of the user changes, the S-CSCF actively sends a Notify notification message to notify UE, P-CSCF, AS. Therefore, the data of the entire network of the UE, the P-CSCF, the S-CSCF, the HSS, and the AS are consistent. In the existing technology of the IMS network, the S-CSCF can actively log off the user for the operation and maintenance needs of the operator (such as blacklist, arrears, pirate call, user management, etc.). The S-CSCF actively cancels the user process in the IMS system, as shown in FIG. 2, and includes the following steps: Step S202: The S-CSCF decides to actively log off an IMS user according to the local policy or the operation and maintenance requirement; Step S204, based on The established subscription/notification mechanism, the S-CSCF sends a notify request to the P-CSCF, the request is used by the S-CSCF to notify the UE to cancel the user, and the request message carries the public user identifier of the user only; Step S206, the P-CSCF forwards The notify request to the UE; Step S208, after the UE completes the logout logic, sends a response message of the notify request to the P-CSCF, such as 200 OK; Step S210, the P-CSCF forwards the notify response message to the S-CSCF; Step S212, based on the established The subscription/notification mechanism, the S-CSCF sends a notify request to the P-CSCF, the request is used by the S-CSCF to notify the P-CSCF to cancel the user, and the request message carries the public user identifier of the user; Step S214, the P-CSCF completes the processing. After the logic, the response message of the notify request is sent to the S-CSCF, such as 200 OK; in step S216, the S-CSCF sends an update user request to the HSS (Server Assignment)

Request, abbreviated as SAR), the request message carries the public user identifier of the user, and the HSS is notified to log off the user; Step S218, after the HSS completes the logout logic, sends an Update User Response (SAA) to the S-CSCF; S220: The S-CSCF sends a notify request to the AS according to the established subscription/notification mechanism, where the request is used by the S-CSCF to notify the AS to cancel the user, and the request message carries the public user identifier of the user only; Step S222: After the AS completes the processing logic, the AS sends a response message of the notify request to the S-CSCF, such as 200 OK. In the foregoing process, when the S-CSCF actively deregisters the user, the UE, the P-CSCF, the S-CSCF, and the HSS can be guaranteed. The AS's network-wide data is consistent. However, the inventor found that the S-CSCF active cancellation user cannot meet the 3rd Generation Partnership Project (referred to as the 3rd Generation Partnership Project).

3GPP) and operators are based on the needs of operations and policies, such as user management, business management, and so on. SUMMARY OF THE INVENTION In view of the problem that the S-CSCF active deregistration user in the related art cannot meet the requirements of the third generation partner program and the operator based on the operation and maintenance strategy, the main objective of the present invention is to provide a method for canceling the user to solve the above problem. At least one of the problems. According to one aspect of the invention, a method of logging out a user is provided. The method for canceling a user according to the present invention includes: the service call S-CSCF receives a notification message from the AS indicating that the user is logged off, wherein the notification message carries the public user identifier; the S-CSCF parses the notification message and cancels the corresponding corresponding to the public user identifier. user. Before the S-CSCF receives the notification message, the method further includes: the AS determines, according to the local policy and/or the operation requirement, that the user needs to be actively logged off; the AS constructs the notification message.

The AS constructs the notification message to include: the AS in the notification message carries the indication information of the AS actively canceling the user through the session initial protocol SIP header field or the extended parameter in the header field.

The S-CSCF parsing the notification message includes: The S-CSCF obtains the public user identifier and the indication information from the notification message.

Before the S-CSCF cancels the user corresponding to the public user identifier, the S-CSCF determines the validity of the notification message. If the notification message is valid, the S-CSCF determines to cancel the user corresponding to the public user identifier. The notification message includes one of the following: a registration request message, a subscription request message. According to one aspect of the invention, a system for logging out of a user is provided. The system for canceling a user according to the present invention comprises: AS, configured to send a notification message indicating that the user is logged out to the service call S-CSCF, wherein the notification message carries a public user identifier; S-CSCF, set to resolve the notification message and log out of the public User corresponding to the user ID.

The AS is also configured to determine the need to actively log off the user based on local policies and/or operational requirements to construct a notification message.

The AS is further configured to carry the indication information of the AS actively deregistering the user through the session initial protocol SIP header field or the extended parameter in the header field in the notification message.

The S-CSCF is further configured to obtain a public user identifier and indication information from the notification message.

The S-CSCF is further configured to determine the validity of the notification message, and determine to cancel the user corresponding to the public user identifier if the notification message is legal. Through the invention, the AS actively constructs and sends a notification message to the S-CSCF, and the S-CSCF completes the operation of canceling the user, and solves the problem that the S-CSCF actively cancels the user in the related technology and cannot satisfy the third-generation partner program and the operator based on the operation. The need for peacekeeping strategies can meet the needs of operators' operation and maintenance strategies and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of an IMS network architecture according to the related art; FIG. 2 is a flowchart of an IP multimedia subsystem S-CSCF actively deregistering a user according to the related art; FIG. 3 is a logout according to an embodiment of the present invention. FIG. 4 is a flowchart of a method for canceling a user according to a preferred embodiment 1 of the present invention; FIG. 5 is a flowchart of a method for canceling a user according to a preferred embodiment 2 of the present invention; A structural block diagram of a system for canceling a user according to an embodiment 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. The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. In the IMS network, the S-CSCF can actively log out the user. However, based on the requirements of the operator's operation and maintenance and the policy, the AS is expected to actively log off the user. The following describes the technical solution for the AS to log off the user manually. 3 is a flow chart of a method of deregistering a user in accordance with an embodiment of the present invention. As shown in FIG. 3, the method for canceling a user according to the embodiment of the present invention includes the following processing: Step S302: The S-CSCF receives a notification message from the AS indicating that the user is logged off, where the notification message carries the public user identifier. Step S304: The S-CSCF parses the notification message and deregisters the user corresponding to the public user identifier. Using the above method, the AS constructs a notification message indicating the logout user, and the S-CSCF receives and parses the notification message to perform the operation of logging out the user. It can be compatible with the existing S-CSCF to log off the user's process, realize the purpose of the AS actively canceling the user, and improve the user's body-risk. Preferably, before the S-CSCF receives the notification message, the following processing may be further included: the AS determines, according to the local policy and/or the operation requirement, that the user needs to be actively logged off, and constructs the notification message. With the above processing, it can meet the needs of operators' operation and maintenance policies (AS actively deregisters users' needs) and improve user experience. In the preferred implementation process, the local policy may be configured statically or dynamically according to the needs of different operators. The operation and maintenance requirements may be at least one of the following service requirements: blacklist, arrears, basic service failure, and the like. Preferably, in step S302, the AS configuration notification message may include the following process: The AS carries the indication information of the AS actively deregistering the user in the notification message by using the SIP header field or the extended parameter in the existing header field. Preferably, in step S304, the S-CSCF parsing notification message may include the following process: The S-CSCF obtains the public user identifier and the foregoing indication information from the notification message. The process of constructing the above notification message by the AS and the process of the S-CSCF parsing the notification message can effectively realize the purpose of the AS actively deregistering the user, and improve the user body risk. And the method is simple and easy to implement. Preferably, before performing step S302, the following processing may be further included: (1) the S-CSCF determines the validity of the notification message;

(2) If the notification message is valid, the S-CSCF determines to log out the user corresponding to the above public user identity. In a preferred implementation process, the S-CSCF can determine the validity of the notification message according to the AS identifier or the IP address information carried in the notification message, and perform the logout user operation on the legal notification message. . Through the above processing, the security of the network can be enhanced to prevent malicious logout attacks. Ensure that the appropriate logout action is performed on legitimate cancellation notices. Preferably, the notification message includes but is not limited to one of the following: a registration request message, a subscription request message, and the notification message may also be other messages based on the SIP protocol. The above preferred implementation process is described below in conjunction with FIG. 4 (the notification message is a registration request message) and FIG. 5 (the notification message is a subscription request message). 4 is a flow chart of a method of deregistering a user in accordance with a preferred embodiment 1 of the present invention. As shown in FIG. 4, the AS constructs a registration request message, where the message carries a public user identifier (ie, a user indicating that the user needs to be logged out), and the AS cancels the user indication, and the S-CSCF determines the indication and obtains related information. The user operation is cancelled, and the method mainly includes the following processing: Step S402: The AS determines to actively deregister the IMS user according to the operation and maintenance management requirement; Step S404: The AS constructs a Register request, and the notification message carries the public user identification information, and the Expires is equal to 0. In addition, the SIP protocol extension field or the extended parameter carries the AS active logout indication, such as Event: asdereg „ AS constructs the logout notification message, and sends it to the S-CSCF; Step 4 gathers S406: The S-CSCF receives the AS request message, and passes The prior art judges the validity of the notification message, and through the extended field or the extended parameter in the message, parses out the AS to actively log out the user indication, and prepares to perform the logout user operation; Step S408: The S-CSCF sends a successful response of the logout notification request message to the AS. Step S410: Based on the established subscription/notification mechanism, the S-CSCF sends a notify request to the P-CSCF, where the request is used by the S-CSCF to notify the UE to log off. The user, the request message, carries the public user identifier of the user; Step S412: The P-CSCF forwards the notify request to the UE; Step S414: After completing the logout logic, the UE sends a response message of the notify request to the P-CSCF, such as 200 OK; Step S416 : The P-CSCF forwards the notify response message to the S-CSCF; Step S418: Based on the established subscription/notification mechanism, the S-CSCF sends a notify request to the P-CSCF, the request is used by the S-CSCF to notify the P-CSCF to log off the user. The request message carries the public user identifier of the user. Step S420: After completing the processing logic, the P-CSCF sends a response message of the notify request to the S-CSCF, such as 200 OK. Step S422: The S-CSCF sends an update user request to the HSS ( Server Assignment Request (SAR), the request message carries the public user ID of the user, and notifies the HSS to log off the user; Step S424: After the HSS completes the logout logic, sends an update to the S-CSCF. User response (Server Assignment Answer, referred to as the SAA). FIG. 5 is a flow chart of a method for canceling a user in a preferred embodiment 2 of the present invention. As shown in FIG. 5, the AS constructs a subscribe request message, the message carries the public user identifier, and the AS cancels the user indication, and the S-CSCF performs the logout user operation after determining the indication and obtaining the related information. The method mainly includes the following processing: Step S502: The AS determines to actively deregister the IMS user according to the operation and maintenance management requirement. Step S504: The AS constructs a subscribe request, and the notification message carries the public user identification information, and the Expires is equal to 0. The SIP protocol extension field or the extended parameter carries the AS active logout indication, such as Event: asdereg „ AS constructs the logout notification message, and sends it to the S-CSCF; Step S506: The S-CSCF receives the AS request message, determines the validity of the notification message by using the prior art, and parses out the AS active logout user indication through the extended field or the extended parameter in the message, and prepares to perform the logout user operation; Step S508: The S-CSCF sends a successful response of the logout notification request message to the AS; Step S510: Based on the established subscription/notification mechanism, the S-CSCF sends a notify request to the P-CSCF, where the request is used by the S-CSCF to notify the UE to log off the user, requesting In the message, the public user identifier of the user is carried; Step S512: The P-CSCF forwards the notify request to the UE; Step S514: After completing the logout logic, the UE sends a response message of the notify request to the P-CSCF, and the interface is 200 OK; Step S516: P - The CSCF forwards the notify response message to the S-CSCF; Step S518: Based on the established subscription/notification mechanism, the S-CSCF sends a notify request to the P-CSCF, the request is used by the S-CSCF to notify the P-CSCF to log off the user, requesting In the message, the user's public user identifier is carried; Step S520: After completing the processing logic, the P-CSCF sends a response message of the notify request to the S-CSCF, such as 200 OK; Step S522: S-CSCF Sending an update user request (Server Assignment Request, SAR for short) to the HSS, the request message carries the public user identifier of the user, and notifies the HSS to cancel the user; Step S524: After the HSS completes the logout logic, sends an update user response to the S-CSCF (Server

Assignment Answer, referred to as SAA). 6 is a structural block diagram of a system for logging out a user according to an embodiment of the present invention. The system is applied to the IP multimedia subsystem. As shown in FIG. 6, the system includes: an application server (AS) 10, configured to send a notification message to the S-CSCF indicating that the user is logged off, where the notification message carries the public user identifier; The S-CSCF 12 is configured to parse the notification message and deregister the user corresponding to the public user identifier. In the above system, the AS 10 constructs a notification message indicating the logout user, and the S-CSCF 12 receives and parses the notification message to perform the operation of canceling the user. It can be compatible with the existing S-CSCF to log out the user's process, and realize the purpose of the AS actively deregistering the user and improve the user experience. Preferably, the AS 10 is further configured to determine that the local policy and/or operational requirement needs to actively log off the user, constructing the notification message. With the above processing, it can meet the needs of operators' operation and maintenance strategies (AS actively deregisters users' needs) and improve user body-risk. Preferably, the AS 10 is further configured to carry the indication information that the AS actively logs out the user by using the extended parameter in the SIP header field or the header field in the notification message. Preferably, the S-CSCF 12 is further configured to obtain the public user identifier and the indication information from the notification message. Preferably, the S-CSCF 12 is further configured to determine the validity of the notification message, and determine to cancel the user corresponding to the public user identifier when the notification message is legal. For the above-mentioned system for canceling users, the preferred working mode of the combination of the AS 10 and the S-CSCF 12 can be referred to the description in FIG. 3 to FIG. 5 , and details are not described herein again. In summary, the foregoing technical solution provided by the embodiment of the present invention, the AS constructs a logout notification message of the user, and the message carries the public user identifier and the indication information of the AS logout user, and the S-CSCF parses the message and performs the logout user. The operation ensures the consistency of data across the entire network between the UE, the P-CSCF, the S-CSCF, and the AS. It can meet the needs of operators' operation and maintenance policies (AS actively deregisters users' needs) and improves user experience. And the method is simple and effective, and can be compatible with the process of the existing S-CSCF to log off the user. 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 scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method of deregistering a user, applied to an IP multimedia subsystem, comprising:

The service call session control function entity S-CSCF receives a notification message from the application server AS indicating that the user is logged off, wherein the notification message carries a public user identifier;

The S-CSCF parses the notification message and deregisters the user corresponding to the public user identifier.

The method according to claim 1, wherein before the S-CSCF receives the notification message, the method further includes:

Determining the local policy and/or operational requirements of the AS requires active deregistration of the user;

The AS constructs the notification message.

The method according to claim 2, wherein the constructing the notification message by the AS comprises: the AS carrying the AS initiative in the notification message by using an extended parameter in a SIP initial field or a header field of the session initiation protocol Log out the user's instructions.

4. The method according to claim 3, wherein the parsing the notification message by the S-CSCF comprises:

The S-CSCF obtains the public user identifier and the indication information from the notification message.

The method according to claim 1, wherein before the S-CSCF deregisters the user corresponding to the public user identifier, the method further includes:

The S-CSCF determines the validity of the notification message;

If the notification message is valid, the S-CSCF determines to log off the user corresponding to the public user identity.

The method according to any one of claims 1 to 5, wherein the notification message comprises one of the following: a registration request message, a subscription request message.

7. The system for logging off a user, applied to the IP multimedia subsystem, comprising: an application server AS, configured to send a notification message to the serving call session control function entity S-CSCF indicating that the user is logged off, wherein the notification message carries Public user ID;

The S-CSCF is configured to parse the notification message and deregister the user corresponding to the public user identifier.

8. The system according to claim 7, wherein

The AS is further configured to determine that the local policy and/or operational requirements need to actively log the user, constructing the notification message.

9. The system of claim 8 wherein

The AS is further configured to: in the notification message, carry the indication information that the AS actively logs out the user by using an extended parameter in a SIP initial field or a header field of the Session Initiation Protocol.

10. The system according to claim 9, wherein

The S-CSCF is further configured to obtain the public user identifier and the indication information from the notification message.

The system according to any one of claims 7 to 10, wherein

The S-CSCF is further configured to determine the validity of the notification message, and determine to log off the user corresponding to the public user identifier if the notification message is legal.