WO2008019604A1 - Procédé et système pour améliorer la fiabilité de services et élément de réseau permettant de fournir une régulation d'appels - Google Patents

Procédé et système pour améliorer la fiabilité de services et élément de réseau permettant de fournir une régulation d'appels Download PDF

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Publication number
WO2008019604A1
WO2008019604A1 PCT/CN2007/070318 CN2007070318W WO2008019604A1 WO 2008019604 A1 WO2008019604 A1 WO 2008019604A1 CN 2007070318 W CN2007070318 W CN 2007070318W WO 2008019604 A1 WO2008019604 A1 WO 2008019604A1
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Prior art keywords
redundant
default
service
ifc
network element
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PCT/CN2007/070318
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English (en)
Chinese (zh)
Inventor
Jiongjiong Gu
Feng Liang
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008019604A1 publication Critical patent/WO2008019604A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Definitions

  • the present invention relates to IP-based Multimedia Subsystem (IMS) technology, and more particularly to a method, system and Serving Call Session Control Network Element (S-CSCF) for improving service reliability.
  • IMS IP-based Multimedia Subsystem
  • S-CSCF Serving Call Session Control Network Element
  • the initial service request message includes a plurality of, such as a session initial service request message for performing session service, a subscription initial service request message for subscribing to the service, a registration initial service request message for performing third party registration, and the like. Since the S-CSCF network element processes the initial service request message other than the registration initial service request message, and processes the registration initial service request differently, in this document, the session initial service request message, the subscription initial The service request message and the like, which are the same as the initial service request message, are called the service initial service request message.
  • Each IFC consists of a Trigger Point consisting of a Service Point Trigger and an AS unit.
  • the specific structure is shown in Figure 1.
  • the structure of a single Service Point Trigger is shown in Figure 2.
  • Service Point Trigger is the logical unit of the smallest unit.
  • Each S Service Point Trigger describes the IFC logically in some way. For example, the request Uniform Resource Identifier (Request-URI) shown in Figure 2, Session Initiation Protocol (SIP) Method, the header field type and value in the SIP request message, the session type, or the Session Description Protocol (SDP) description in the SIP request message.
  • Request-URI Uniform Resource Identifier
  • SIP Session Initiation Protocol
  • SDP Session Description Protocol
  • the S-CSCF network element sequentially processes the IFC in the user subscription information according to the priority order of each IFC.
  • the IFC that triggers the service is called the service IFC; the IFC that triggers the third-party registration process is called the registered IFC.
  • the process of the S-CSCF network element triggering the AS to provide services to the user is as shown in Figure 3. It is assumed that there are three service IFCs corresponding to the three ASs in the contract information of the user, which are service IFCs corresponding to AS1, AS2, and AS3, and the priorities are sequentially decreased.
  • the current cartridge is described as follows: When the S-CSCF network element receives the service initial service request message sent by the user, the service provision process of the AS group is triggered. The S-CSCF network element matches the received service initial service request message according to the IFC priority level in the user subscription information. Since the service IFC of AS1 has the highest priority, the S-CSCF first matches the service IFC corresponding to AS1.
  • the S-CSCF network element When the monthly IFC matching of the AS1 is successful, the S-CSCF network element sends an initial service request message received by itself to the AS1, instructing the AS1 to provide the service to the user.
  • AS1 receives the initial service request message of the service, it performs corresponding processing, and returns the S-CSCF network element after correspondingly modifying the content in the service initial service request message. Then, the S-CSCF network element matches the service IFC corresponding to AS2 according to the service initial service request message returned by AS1 according to the IFC priority.
  • the S-CSCF sends an AS initial service request message returned by the AS1 to the AS2, instructing the AS2 to provide the service to the user.
  • the AS2 When the AS2 receives the service initial service request message, the AS2 processes the corresponding service and returns the S-CSCF network element after modifying the content in the service initial service request message. Again, AS3 is processed in a similar manner and will not be described in detail herein.
  • the service initial service request message used by the S-CSCF network element to match the IFC is the current service initial service request message of the S-CSCF; and the service initial service request message sent to the AS is also the latest one. Service initial service request message.
  • the third party registration process is shown in Figure 4.
  • the third party registration process it is assumed that there are three registered IFCs corresponding to the AS in the subscription information of the user, namely, the registered IFCs corresponding to AS1, AS2, and AS3, and AS1, AS2, and AS3 correspond to each other. The priority of registering IFC is reduced in turn.
  • the group consisting of AS1, AS2 and AS3 is referred to as the AS group.
  • the S-CSCF network element After receiving the initial service request message of the user, the S-CSCF network element registers with the user, and obtains the user subscription from the user home server (HSS) after successful registration.
  • HSS user home server
  • the information according to the received initial service request message, matches the IFC in the user subscription information, and initiates a third party registration.
  • the S-CSCF network element matches the IFC in the subscription information according to the registration initial service request message, since the AS1 has the highest priority among the three ASs, the S-CSCF network element first matches the registered IFC of AS1.
  • the S-CSCF network element sends a third-party registration request message to AS1, instructing AS1 to perform third-party registration.
  • the AS1 obtains the user monthly service data from the HSS.
  • the AS1 successfully obtains the user service data from the HSS, the AS1 returns to the S-CSCF network element. Registration success response message.
  • the S-CSCF network element is matched with the registered IFC corresponding to AS2 and the registered IFC corresponding to AS3 according to the IFC priority level, and the AS2 and AS3 are initiated to perform third-party registration.
  • the specific process is the same as the third-party registration process of AS1. , will not be detailed here.
  • Registered services are services that users enjoy while they are registered, such as ring tones, caller ID, and more.
  • a service that can be enjoyed when the user is in an unregistered state is called an unregistered service, such as call forwarding, call secretary, and the like.
  • the main object of the present invention is to provide a method for improving service reliability for avoiding the loss of user service when an AS failure fails to provide services to users.
  • Another main object of the present invention is to provide a system for improving service reliability, which is used to avoid the lack of user service when an AS failure fails to provide services to users.
  • Another main object of the present invention is to provide an S-CSCF for avoiding the loss of user services when an AS failure fails to provide services to users.
  • a method of improving service reliability comprising:
  • the S-CSCF network element triggers the default AS to provide services to the user. If it is determined that the default AS cannot provide services to the user due to a failure, the redundant AS corresponding to the default AS is selected to provide services to the user.
  • a system for improving service reliability includes at least an S-CSCF network element, a default AS, and a redundant AS corresponding to the default AS;
  • An S-CSCF network element configured to send a service request to the default AS; and determine that the default AS sends a service request to the redundant AS corresponding to the default AS, because the fault is not available to the user;
  • the default AS is used to provide services to the user when receiving the service request of the S-CSCF network element.
  • the redundant AS is configured to provide a service to the user when receiving the service request of the S-CSCF network element.
  • An S-CSCF network element includes: a transceiver unit and a detecting unit, and a transceiver unit, configured to send a service request to the default AS, and after receiving the triggering redundancy notification, the redundancy corresponding to the default AS The remaining AS sends a service request;
  • the detecting unit is configured to send a trigger redundancy notification when the default AS cannot provide a service to the user due to a failure.
  • the method for improving the reliability of the service provided by the present invention provides a redundant AS for the default AS in the IMS system.
  • the default AS cannot provide services for the user due to a fault
  • the default AS continues to provide the user with the default AS.
  • the user can enjoy the service normally.
  • the present invention also provides a system for providing service reliability.
  • the method and system provided by the present invention can ensure that a service enjoyed by a user in an IMS system is no longer provided by a single AS, and the default AS that originally provided the service for the user cannot provide services for the user due to a failure.
  • the redundant AS corresponding to the default AS continues to provide services for users, which avoids the lack of user services and ensures the quality of service of users.
  • FIG. 1 is a structural diagram of an IFC in the prior art.
  • FIG. 2 is a structural diagram of a Service Point Trigger in the prior art.
  • FIG. 3 is a flow chart of a service provided by an AS in the prior art.
  • FIG. 5 is a flowchart of the AS providing monthly services in the first embodiment of the present invention.
  • FIG. 6 is a flowchart of the AS providing monthly service in the second embodiment of the present invention.
  • FIG. 7 is a flowchart of triggering an AS to perform third party registration in Embodiment 2 of the present invention.
  • FIG. 8 is a structural diagram of a system according to an embodiment of the present invention.
  • FIG. 9 is a structural diagram of an S-CSCF network element according to an embodiment of the present invention. Mode for carrying out the invention
  • the corresponding AS to the default AS. If the default AS that serves the user fails, the redundant AS corresponding to the default AS is used instead of the default AS. Service, so that the services enjoyed by users are not affected, and the quality of service of users is guaranteed.
  • the AS is referred to as a default AS, and the redundant AS has the same function as its corresponding default AS.
  • One problem to be noted in the embodiment of the present invention is: There are many reasons why the default AS cannot provide services for the user, such as the user does not have the right to use the service, or the user does not have sufficient funds, or the third-party server interaction timeout, or It is due to a failure of the AS.
  • the solution to be solved by the embodiment of the present invention is: When the default AS fails, for example, the default AS is dead, the hardware is faulty, or the communication network where the default AS is located is faulty, and the service cannot be provided to the user, The corresponding redundant AS provides services to the user instead of the default AS.
  • AS failure failure of the AS itself or the network communication failure cylinder is referred to as: AS failure.
  • the AS fails to respond to the S-CSCF, it first needs to distinguish the cause of the failure of the AS response.
  • the corresponding redundant AS is triggered to provide services to the user instead of the default AS.
  • the first embodiment describes that the corresponding AS is set to the default AS, and the IFC of the redundant AS is added in the user subscription information table, and the S-CSCF network element matches the IFC of the redundant AS. Further, when the default AS cannot provide services to the user due to a failure, the redundant AS is triggered to provide a service to the user instead of the corresponding default AS.
  • the second embodiment describes that a redundant correspondence table is added to the S-CSCF network element, and the correspondence between the default AS and the corresponding redundant AS is recorded in the redundant correspondence table;
  • the S-CSCF network element searches for the redundant correspondence table to determine whether the default AS has a corresponding redundant AS. If yes, the redundant AS is triggered to provide services to the user.
  • the corresponding redundant AS1 is set for the default AS1, and the redundant AS1 has the same function as the default AS1.
  • the S-CSCF network element triggers the AS to provide services to the user by matching the service IFC in the user subscription information. Therefore, in order to enable the redundant AS1 to provide a service to the user instead of the default AS1 when the corresponding default AS1 fails, the service IFC needs to be generated in the user subscription information for the set redundant AS1 for the S-CSCF. When the default AS1 cannot provide services, the NE triggers the corresponding redundant AS1 to provide services.
  • the S-CSCF network element When the response returned by the AS to the initial service request sent by the S-CSCF network element is 408, 5XX or no response, the S-CSCF network element reads the default in the service IFC corresponding to the default AS.
  • the Default Handling property which includes session continuation (SESSION_CONTINUED) and session termination (SESSION-TERMINATED).
  • the next operation is determined according to the value of the attribute, specifically: If the value of the attribute in an IFC is (SESSION_CONTINUED), when the AS returns 408, 5XX or no response to the service request, the S-CSCF network element continues.
  • the current service request of the user may continue to be processed; if the attribute value is (SESSION_TERMINATED), the S-CSCF network element does not continue to process the remaining IFC in the user subscription information, the current user The business processing request will be terminated.
  • AS Returning the failure response other than the above three the S-CSCF network element will not read the Default Handling attribute and directly terminate the current service request.
  • the AS does not return a response message to the S-CSCF network element, returns 408 or 5XX, and some other failure responses, and is collectively referred to as the AS response to the S-CSCF network element. .
  • 408 and 5XX respectively represent a failure response
  • 408 represents a request timeout message
  • 5XX represents a server error message. Therefore, in the present invention, when the AS returns 408 or 5XX to the S-CSCF network element, or does not return a response, it determines that the default AS fails due to its own fault, or the communication network where the default AS is located fails, and the AS cannot The user provides the service.
  • the service IFC is added to the set AS1 in the user subscription information table.
  • the process of generating the service IFC of the AS may specifically include the following three steps:
  • the priority of the copied service IFC is increased by 1, that is, the priority of the redundant AS is second only to the priority of the default AS, so that the S-CSCF processes the corresponding service after processing the default AS service IFC. Redundant AS's monthly service IFC;
  • the redundant AS when generating the service IFC of AS1, the redundant AS provides the service to the user when the default AS cannot provide the service; and when the default AS can provide the service, the redundant AS does not provide the service to the user.
  • a Service Point Trigger is added to the Trigger Point to describe the condition that AS1 provides a service failure, which is referred to as a redundancy trigger condition in the present invention.
  • a success flag is added to the service initial service request message to indicate whether the AS successfully provides services to the user.
  • the condition defined by the Service Point Trigger of the new force P is related to the condition defined in the original Trigger Point, that is, when both the condition defined in the original Trigger Point and the added SERVICE POINT TRIGGERService Point Trigger are defined. , in order to trigger redundant AS1, to provide services to users.
  • the redundant AS1 provides services to the user.
  • the process is shown in Figure 5. Only described in FIG. 5 is a process in which the S-CSCF network element processes the service IFC and the redundant AS1 corresponding to the default AS1, and the corresponding service IFC.
  • Step 501 When the S-CSCF network element matches the IFC in the user subscription information according to the received service initial service request message, and matches the monthly good service IFC corresponding to the default AS1, the AS1 is sent to the AS1.
  • the sending itself receives the service initial service request message, instructing AS1 to provide the service to the user.
  • the user subscription information is obtained from the HSS by the S-CSCF network element.
  • Step 502 After receiving the service initial service request message, the AS1 provides a service to the user, and returns a response to the S-CSCF network element.
  • the response returned by the S-CSCF network element to the user may exist in the following three cases, specifically:
  • the S-CSCF network element When the AS1 fails, that is, if the AS1 itself fails or the communication network with the S-CSCF is interrupted, the S-CSCF network element will not receive any message sent from AS1. When the S-CSCF network element waits for a timeout, it determines that the AS1 response failed.
  • Step 503 The S-CSCF network element determines whether the response returned by the current default AS1 is a successful response. If yes, step 506 is performed; otherwise, step 504 is performed.
  • the method of determining whether the returned response is a successful response is to determine whether the AS1 returns a service initial service request message, and if so, a successful response is returned; otherwise, the AS1 returns a non-successful response.
  • Step 504 The S-CSCF network element determines whether the Default Handling attribute is read. If yes, step 505 is performed; otherwise, step 510 is performed.
  • the S-CSCF network element reads the Default Handling attribute in the IFC of AS1. Here, it is determined whether the Default Handling attribute is triggered to be read. Or 5XX, or no response message is received, if yes, the Default Handling property is read; otherwise, the Default Handling property is not read, and the user's business request is directly terminated.
  • Step 505 The S-CSCF network element reads the Default Handling attribute. Since the Default Handling attribute of the default AS1 is SESSION_CONTINUED, the S-CSCF network element performs step 506.
  • Step 506 The S-CSCF network element continues to match the IFC after the service IFC whose priority is located in AS 1.
  • the priority of the serving IFC is only lower than the priority of the AS1 service IFC. Therefore, the S-CSCF network element reads the service IFC whose IFC is AS1, and determines whether the current service initial service request message is Match the service IFC of AS1, if yes, go to step 507; otherwise, go to step 509.
  • the specific judgment method is: since a Service Point Trigger for describing the redundancy trigger condition is added to the service IFC of AS1, it is judged when judging whether the current service initial service request message matches the service IFC of AS1. Whether the redundant trigger condition is met.
  • the parameter When the parameter is used, it cannot match the service IFC of AS1; if not, J, it matches the service IFC of AS1.
  • the judgment method described in this paragraph can ensure that the default AS can provide services to the user when the default AS cannot provide services to the user.
  • the redundant AS does not. Provide services to users. Therefore, it can be obtained by the step 506 that when the default AS1 returns a successful response, the corresponding service initial service request message carries the DN parameter, and the service IFC of the redundant AS 1 cannot be successfully matched, and thus cannot be triggered. Redundant AS 1, providing services to users. When the default AS1 does not return a successful response, the redundancy trigger condition of the service IFC of the redundant AS1 is satisfied, and the redundant AS1 provides the service to the user.
  • the monthly service initial service request message used for the judgment is also different.
  • the service initial service request message used for the judgment is that the AS1 returns the service initial service processed by itself to the S-CSCF.
  • Request message when AS1 does not return a response, or 408, or 5XX to the S-CSCF, the service initial service request message used for the judgment is the service initial service received by the S-CSCF network element before the default AS1 is triggered. Request message.
  • the service initial service request message used to match the IFC is that the S-CSCF network element currently receives the latest service initial service request message.
  • Step 507 The S-CSCF network element sends an initial service initial service request message to the AS1, instructing the AS1 to provide a service to the user.
  • Step 508 Redundant AS 1, processing the received service initial service request message, and returning a response at the S-CSCF.
  • the specific processing is the same as that of AS1 and will not be described in detail here.
  • the redundant AS 1 returns a successful response, or when the failure, the default Handling attribute of the service IFC of the redundant AS 1, is SESSION_CONTINUED, then step 509 is performed.
  • Step 509 The S-CSCF network element matches the IFC next, and the subsequent process is performed.
  • Step 510 Terminate the current user's service request.
  • an enhancement scheme is also provided that only determines that the redundant AS provides services to the user when the AS does not respond. To achieve this, you need to set a value for the Default Handling property of the AS unit in the service IFC: Session Redirection ( SESSION_REDIRECTED ).
  • the BT's S-CSCF network element When the Default Handling attribute is SESSION_REDIRECTED, when the BT's S-CSCF network element receives 408 or 5XX, it does not match the next IFC, but directly determines whether it needs to continue reading according to the Default Handling attribute in the next IFC. The next IFC, or the termination of the current service request; when the S-CSCF network element determines that the default AS is not responding, the operation of matching the next IFC is performed.
  • An example is as follows: Suppose there are three service IFCs, namely service IFC1, service IFC2, and service IFC3, and the priorities are sequentially lowered.
  • the result of the S-CSCF network element matching service IFC1 is that the AS corresponding to the service IFC1 fails to respond to the S-CSCF network element, and the S-CSCF network element needs to determine the next operation according to the Default Handling attribute in the IFC1.
  • the S-CSCF network element reads the default Handling attribute in the IFC1 to SESSION_REDIRECTED, it determines whether the AS corresponding to the service IFC 1 does not return a response message. If yes, the S-CSCF network element performs the operation of matching the service IFC2.
  • the S-CSCF network element receives 408 or 5XX, the S-CSCF network element does not match the service IFC2, but directly determines whether it needs to continue to read the service IFC3, or terminate according to the Default Handling attribute in the service IFC2. Current business request. At this time, while generating the Default Handling attribute of the redundant AS1, it is also necessary to modify the IFC of the default AS1 so that the Default Handling attribute is SESSION_REDIRECTED.
  • step 506 When the S-CSCF network element reads the Default Handling attribute in step 505 of the process shown in FIG. 5, the Default Handling attribute of the default AS1 is SESSION_REDIRECTED, and then the default is determined. Whether AS1 does not return a response to the S-CSCF network element. If yes, step 506 is executed, and according to the execution result of step 506, the subsequent process shown in FIG. 5 is performed; otherwise, step 505 ' is performed.
  • Step 505 The S-CSCF network element reads the priority second only to the current AS1 IFC priority.
  • the IFC in this embodiment, is the service IFC of the corresponding redundant AS1, and determines whether to terminate the current user's service request according to the Default Handling attribute in the monthly service IFC of the redundant AS1.
  • the shell 'J S-CSCF network element reads the IFC after the service IFC whose priority is located in AS1, and performs the operation of matching the IFC, according to the matching result. The subsequent process is performed; when the Default Handling attribute is SESSION_TERMINATED, step 510 is performed.
  • the present embodiment can ensure that the default AS in which the redundant AS is set cannot succeed to the user due to a failure.
  • the triggered redundant AS is provided to the user.
  • the S-CSCF network element does not trigger the redundant AS to provide services to the user when the default AS successful user provides the service.
  • the corresponding redundant AS1 when the service provided by the default AS1 is a registered service, the corresponding redundant AS1 also provides a registered service.
  • the user status at this time needs to be in the registration state. Therefore, in order for the redundant AS to provide the registered service to the user instead of the corresponding default AS, the redundant AS must perform third-party registration. Therefore, in order to enable the redundant AS to provide a service to the user instead of the default AS when the corresponding default AS fails, it is necessary to further generate a registration IFC for triggering the redundant AS for the set redundant AS in the user subscription information.
  • Third party registration process Here, the process of generating a registered IFC is as follows.
  • the ServerName value is the SIP URL of the redundant AS itself; the registered IFC of the redundant AS is generated.
  • AS1 is further determined, and the Default Handling value in the registered IFC is SESSION_CONTINUED.
  • the Default Handling value in the AS1 registration IFC is SESSION_CONTINUED, so as to provide the service opportunity for the redundant AS1, in AS1.
  • AS1 can still perform third-party registration, and the redundant AS1, the Default Handling value in the registered IFC remains the original default AS1.
  • the S-CSCF network element Because the registered IFC of the redundant AS1 is set in the user subscription information, the S-CSCF network element only needs to be matched according to the priority of the IFC priority, and the default AS1 and the redundant AS1 can be triggered. When AS1 is registered with a third party, the redundant AS1 can be triggered to provide the registered service to the user.
  • the AS group is composed of a plurality of ASs
  • an AS that does not have a redundant AS is also referred to as a default AS.
  • the processing method for each redundant AS is the same as that described in the present invention, and will not be described in detail herein.
  • a redundant correspondence table is set in the S-CSCF network element, and a correspondence between the default AS and the corresponding redundant AS and a SIP URL address of the redundant AS are recorded in the redundant correspondence table.
  • the redundant AS replaces the default AS to provide services to the user.
  • the specific process is as follows: Step 601: The S-CSCF network element is in the process. After the AS is triggered to provide services to the user, the AS determines whether the AS successfully provides services to the user. If the service is successfully provided to the user, step 605 is performed; otherwise, step 602 is performed. The S-CSCF network element determines whether the AS successfully provides the service to the user. The method is to determine whether the AS returns the service initial service request message to the user. When the default AS returns the service initial service request message, the default AS successfully provides the service to the user. .
  • Step 602 The S-CSCF network element determines whether the AS cannot provide services to the user due to a fault. If yes, step 603 is performed; otherwise, step 605 is performed.
  • the S-CSCF network element determines whether the AS cannot provide services to the user due to a fault.
  • the first method is to determine whether there is no return message, or return 408, or return 5XX. If one of the three conditions is established, the AS cannot provide services to the user due to the failure; the second is that the S-CSCF network element only judges whether the AS returns a response message, and when the AS does not return a response message to the S-CSCF network element, Then, the AS cannot provide the user with a monthly service due to the failure.
  • the AS returns a response message to the S-CSCF network element, regardless of the response, it is determined that the AS cannot provide the service to the user due to the failure.
  • Step 603 The S-CSCF network element searches its own redundancy relationship correspondence table, and determines whether there is a record of the AS. If yes, step 604 is performed; otherwise, step 605 is performed.
  • step 603 may also be performed before step 602 is performed.
  • Step 604 The S-CSCF network element triggers the redundant AS to provide a service to the user according to the SIP URL address information of the redundant AS recorded in the redundancy relationship correspondence table. Step 605 is performed.
  • the S-CSCF network element triggers the redundancy.
  • the AS provides services to the user by resending the service initial service request message sent to the default AS to the redundant AS.
  • the S-CSCF network element can further read the Default Handling of the default AS corresponding to the redundant AS, and if it is SESSION_TERMINATED, the low priority is not processed. IFC; if it is SESSION_CONTINUED, step 605 is performed.
  • Step 605 Continue to read the next IFC in the user subscription information.
  • the redundancy relationship correspondence table is set, and the process shown in FIG. 6 can be guaranteed.
  • the default AS of the redundant AS is set to trigger the redundant AS to provide the user with the fault.
  • the S-CSCF network element does not trigger the redundancy when the default AS user provides the service.
  • the AS provides services to users.
  • Step 701 After performing the third-party registration on each default AS, the S-CSCF network element searches for the redundant correspondence table, and determines whether the default AS of the current third-party registration has a corresponding redundant AS, that is, determining the self. Whether redundant AS is set, if yes, step 702 is performed; otherwise, step 703 is performed.
  • the S-CSCF network element performs the process shown in FIG. 6 after each AS performs the third-party registration, regardless of whether the AS currently registered by the third party successfully performs the third-party registration.
  • Step 702 Trigger the third party registration of the redundant AS according to the SIP URL address of the redundant AS recorded in the redundant correspondence table.
  • Step 703 After the redundant AS completes the third-party registration, the S-CSCF network element determines whether the redundant AS successfully completes the registration, and if yes, performs step 705; otherwise, performs step 704.
  • Step 704 The S-CSCF network element reads the default Handing of the default AS corresponding to the redundant AS. If it is SESSION_TERMINATED, the low priority IFC is no longer processed. If it is SESSION_CONTINUED, step 705 is performed.
  • Step 705 Continue processing the next IFC in the low priority of the user subscription information.
  • the present invention provides a system for improving service reliability, and provides a system for providing service reliability.
  • the specific structure of the system is as shown in FIG. 8.
  • the system is at least an S-CSCF network element, and a default AS. And the redundant AS corresponding to the default AS; wherein
  • the S-CSCF network element is configured to send a service request to the default AS, and determine that the default AS sends the service to the user due to the failure, and send the message to the redundant AS corresponding to the default AS. Request for service;
  • the default AS is used to provide services to the user when receiving the service request of the S-CSCF network element.
  • the redundant AS is configured to provide a service to the user when receiving the service request of the S-CSCF network element.
  • the S-CSCF network element is further configured to: when the default AS sets a redundant AS, initiate a third-party registration request to the redundant AS;
  • the redundant AS is further configured to perform third-party registration when receiving a third-party registration request initiated by the S-CSCF network element.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé permettant d'améliorer la fiabilité de service d'ensembles correspondant à un serveur d'application redondant pour un serveur d'application par défaut. La S-CSCF déclenche le serveur d'application par défaut de manière à fournir un service à un utilisateur, et si le serveur d'application par défaut est défaillant, le serveur d'application redondant correspondant est sélectionné de manière à fournir ledit service. L'invention concerne également un système permettant d'améliorer la fiabilité du service. Le procédé et le système permettent d'assurer qu'un serveur d'application ne fournit pas seul un service à l'utilisateur, et lorsque le serveur d'application par défaut est défaillant, le serveur d'application redondant correspondant peut continuer à fournir le service. Cela permet d'éviter la perte du service et d'assurer la qualité de service.
PCT/CN2007/070318 2006-08-09 2007-07-26 Procédé et système pour améliorer la fiabilité de services et élément de réseau permettant de fournir une régulation d'appels WO2008019604A1 (fr)

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CN200610109748A CN1905433B (zh) 2006-08-09 2006-08-09 一种提高服务可靠性的方法及系统

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CN101447890B (zh) * 2008-04-15 2011-11-30 中兴通讯股份有限公司 一种下一代网络中改进的应用服务器容灾的系统及方法
CN101895915B (zh) * 2010-07-28 2013-01-02 中国电信股份有限公司 应用服务器旁路方法及服务型呼叫会话控制功能设备
CN103095484B (zh) * 2011-11-01 2019-01-08 中兴通讯股份有限公司 一种as异常的处理方法及系统
CN104125591B (zh) * 2013-04-27 2017-10-27 中国移动通信集团河南有限公司 一种基于ims的呼叫控制方法、装置及系统
CN103870991B (zh) 2014-03-14 2018-01-12 广州广电运通金融电子股份有限公司 自助终端业务应急方法以及网点服务器

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US20040153709A1 (en) * 2002-07-03 2004-08-05 Burton-Krahn Noel Morgen Method and apparatus for providing transparent fault tolerance within an application server environment
US20060031540A1 (en) * 2002-08-28 2006-02-09 Jouni Purontaus High availability software based contact centre
CN1773967A (zh) * 2004-11-08 2006-05-17 华为技术有限公司 通过分组域为电路域用户提供业务的方法

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