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WO2010139279A1 - Procédé et système de traitement d'une altération de la fonction de service de contrôle de session d'appel (s-cscf) dans un réseau de sous-système multimédia ip (ims) - Google Patents

Procédé et système de traitement d'une altération de la fonction de service de contrôle de session d'appel (s-cscf) dans un réseau de sous-système multimédia ip (ims) Download PDF

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Publication number
WO2010139279A1
WO2010139279A1 PCT/CN2010/073508 CN2010073508W WO2010139279A1 WO 2010139279 A1 WO2010139279 A1 WO 2010139279A1 CN 2010073508 W CN2010073508 W CN 2010073508W WO 2010139279 A1 WO2010139279 A1 WO 2010139279A1
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WO
WIPO (PCT)
Prior art keywords
cscf
user
hss
registered
request
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2010/073508
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English (en)
Chinese (zh)
Inventor
罗永胜
王斌
盛国平
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ZTE Corp
Original Assignee
ZTE Corp
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Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2010139279A1 publication Critical patent/WO2010139279A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1073—Registration or de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection

Definitions

  • the present invention relates to the field of communications, and in particular to an IP Multimedia Core Network Subsystem (IMS) for processing a user-registered service call session control function (S-CSCF). ) Method and system of change.
  • IMS IP Multimedia Core Network Subsystem
  • S-CSCF user-registered service call session control function
  • the IP Multimedia Subsystem is the 3rd Generation Partnership (3rd Generation Partnership)
  • the next-generation network standard defined by Project, 3GPP for short, is characterized by the use of the Session Initial Protocol (SIP) system. Communication and access are independent, and multimedia service control functions can be separated from bearer capabilities. Separation from services, separation of applications and services, separation of services from networks, and convergence of mobile and Internet services.
  • the main functional entities in the IMS include a Call Control Function (CSCF) that controls user registration and session control functions, and a Home Subscriber Server (HSS) that centrally manages user subscription data.
  • CSCF Call Control Function
  • HSS Home Subscriber Server
  • AS Application Server
  • functional entities such as the Interconnection Border Control Function (IBCF) and the Subscription Locator Function (SLF) are involved in the session.
  • IBCF Interconnection Border Control Function
  • SMF Subscription Locator Function
  • S-CSCF service call session control functions
  • the technical problem to be solved by the present invention is to provide a method and system for processing an S-CSCF change in an IMS network, which satisfies the requirement that a user in the IMS network can still register successfully and use a network service in the case of a change in the S-CSCF.
  • the present invention provides a method for processing an S-CSCF change in an IMS network, including: after the home subscriber server HSS receives a server assignment request sent by a service proxy call session control function S-CSCF, if the user is checked out The registration status of the HSS is registered, and the second service call session control function S-CSCF2 of the current registration is inconsistent with the first service call session control function S-CSCF1 of the last registration, and the server assignment failure response is sent.
  • the method further includes: the HSS checking whether the registration status of the user is registered by checking the public user identifier PUI of the user.
  • the method further includes: the HSS by using the host name of the S-CSCF in the server assignment request and the saved in the HSS The host name of the S-CSCF registered by the user is compared, and it is checked whether the S-CSCF registered by the user is inconsistent with the previously registered S-CSCF.
  • the method further includes: after receiving the MAR request and completing a subsequent user registration process, the HSS sends a network logout request to the S-CSCF1 to notify the S-CSCF1 that the user is registered.
  • the S-CSCF changes; after receiving the network logout request, the S-CSCF1 deletes the local user data of the user, or retains the user data and marks the user-registered S-CSCF to be changed; and sends a network logout response to The HSS.
  • the method further comprises: if the HSS does not receive the network logout response, sending the network logout request again after a certain time until receiving the network logout response or exceeding the upper limit of the number of retransmissions.
  • the HSS indicates that the S-CSCF registered by the user is changed by a failure code in the server failure response.
  • the present invention provides a system for processing an S-CSCF change in an IMS network, including a user equipment UE, a home subscriber server HSS, a first serving call session control function S-CSCF1, and a second service call session control function.
  • the HSS is configured to: after receiving the server assignment request sent by the S-CSCF2, if it is checked that the registration status of the UE in the HSS is registered, and the registered S- The CSCF2 is inconsistent with the S-CSCF1 that was last registered, and then sends a server assignment failure response to the S-CSCF2, and indicates that the S-CSCF registered by the user is changed in the server assignment failure response; After receiving the multimedia authentication request MAR sent by the S-CSCF2, completing a subsequent user registration process;
  • the S-CSCF2 is configured to: after receiving the server assignment failure response, according to which
  • the HSS is configured to: check the host registration by comparing the host name of the S-CSCF in the server assignment request with the host name of the S-CSCF registered by the user saved in the HSS. Whether the S-CSCF is inconsistent with the previously registered S-CSCF.
  • the HSS is further configured to: after completing the subsequent user registration process, to the
  • the S-CSCF1 sends a network logout request to notify the S-CSCF1 that the S-CSCF registered by the user is changed; the S-CSCF1 is configured to: after receiving the network logout request, delete the local user data of the user, Or retain the user data and mark the change of the S-CSCF registered by the user; and send a network logout response to the HSS.
  • the HSS is further configured to: after sending the network logout request, if the network logout response is not received, send the network logout request again after a certain time, until Received a network logout response or exceeded the upper limit of the number of retransmissions.
  • the present invention provides a home subscriber server HSS, including a receiving unit, an inspecting unit, and a sending unit, where: the receiving unit is configured to: receive a server assignment request sent by a service proxy call session control function S-CSCF
  • the checking unit is configured to: according to the server assignment request received by the receiving unit, if it is checked that the registration status of the UE in the HSS is registered, and the registered S-CSCF2 and the last registered assignment If the S-CSCF1 is inconsistent, the sending unit is notified; the sending unit is configured to: send a server assignment failure response to the S-CSCF2 according to the notification of the checking unit, and indicate the user registration in the server assignment failure response The S-CSCF has changed.
  • the checking unit is configured to: check the user registration by comparing a host name of the S-CSCF in the server assignment request with a host name of the S-CSCF registered by the user saved in the HSS. Whether the S-CSCF is inconsistent with the previously registered S-CSCF.
  • the sending unit is further configured to: after the HSS receives the multimedia authentication request MAR request sent by the S-CSCF2, and completes a subsequent user registration process, sending a network logout request to the S-CSCF1, notifying the station S-CSCF1 The S-CSCF registered by the user is changed.
  • the sending unit is further configured to: after sending the network logout request, if the network logout response sent by the S-CSCF1 is not received, send the network logout request again after a certain time, until Received a network logout response or exceeded the upper limit of the number of retransmissions.
  • FIG. 1 is a flowchart of a process in which a registration failure occurs in a conventional S-CSCF change
  • FIG. 2 is a flowchart of a process in which a user registration is successful in a case where a S-CSCF is changed according to an embodiment of the present invention
  • System Schematic FIG. 4 is a schematic diagram of the composition of an HSS according to an embodiment of the present invention.
  • the user switches to the S-CSCF1 for registration, and the user registration status on the HSS is also associated with the S-CSCF1;
  • the user new registration request is sent to the query call session control function (referred to as I-CSCF) by the proxy call session control function (referred to as P-CSCF); S104, the I-CSCF forwards the registration request to the S-CSCF1 after querying the HSS ;
  • I-CSCF query call session control function
  • P-CSCF proxy call session control function
  • S-CSCF1 does not respond due to a link interruption or other failure, or returns an error response of 3xx or 408;
  • the I-CSCF reselects the S-CSCF, and sends a registration request to the S-CSCF2;
  • the user is registered in the S-CSCF2, and the S-CSCF2 has the user data and the authentication data information of the user, and does not send a multimedia authentication request to the HSS (Multimedia-Auth-Request, referred to as
  • MAR obtains the authentication data and directly sends the 401 authentication challenge response
  • the S-CSCF2 sends a 401 authentication challenge response to the I-CSCF;
  • the I-CSCF forwards the 401 authentication challenge response to the P-CSCF, and the P-CSCF forwards the request to the user equipment (User Equipment, UE for short); S110, the registration request of the user carrying the challenge response is sent to the I-P-CSCF.
  • CSCF CSCF
  • Si ll the I-CSCF forwards the registration request to the S-CSCF2;
  • S-CSCF2 sends a server assignment request (Server- Assignment-Request, SAR for short) to the HSS after authenticating the user;
  • the HSS checks the user registration status, and finds that the registered S-CSCF is inconsistent with the S-CSCF assigned by the last registration, and sends an error response;
  • the HSS sending server assigns a failure response to the S-CSCF2;
  • the registration fails, and the S-CSCF2 sends a registration failure response to the I-CSCF;
  • the I-CSCF forwards the registration failure response to the P-CSCF, and the P-CSCF forwards the packet to the UE.
  • the S-CSCF2 does not obtain the authentication information data from the HSS because the user has already authenticated the S-CSCF due to multiple disaster tolerances.
  • the server assigns a request to the HSS
  • the HSS checks that the registered S-CSCF is inconsistent with the last registered S-CSCF according to the protocol, and returns an error response.
  • the prior art does not further process this process error.
  • Direct registration failed, resulting in unsuccessful user registration, unable to use the service.
  • the original registered S-CSCF cannot be known, and therefore the user data of the user cannot be deleted normally, thereby causing data redundancy.
  • the HSS After receiving the server assignment request SAR sent by the S-CSCF, the HSS checks that the registration status of the user in the HSS is registered, and the second service call session control function S-CSCF2 registered this time and the last registration assignment If the service call session control function S-CSCF1 is inconsistent, the S-CSCF indicating that the user is registered in the server assignment failure response sent to the S-CSCF2 is inconsistent with the previously registered SCSCF;
  • the S-CSCF2 After receiving the server assignment failure response, the S-CSCF2 sends a multimedia authentication request (Multimedia-Auth-Request, referred to as MAR) to the HSS if the SCSCF inconsistency is indicated in the failure response.
  • MAR Multimedia-Auth-Request
  • the HSS After receiving the MAR request, the HSS will save the host name of the S-CSCF2 carried in the MAR request, and record the change information including the host name of the original S-CSCF1 to complete the subsequent users. registration process. In this way, after the MAR authentication process, when the subsequent processing server assigns the request SAR, the HSS will not return an error response because the S-CSCF is inconsistent, so that the user can successfully register.
  • the HSS may send a Registration-Termination-Request (RTR) to the original S-CSCF1 to notify the original S-CSCF1 that the user has been assigned to another new S. -CSCF;
  • RTR Registration-Termination-Request
  • the S-CSCF1 After receiving the network logoff request RTR of the HSS, the S-CSCF1 learns that the user has assigned a new S-CSCF, deletes the local user data information of the user, and sends an RTA response to the HSS. Alternatively, the user's local user data may be retained and the user is already registered with a new S-CSCF.
  • the HSS determines that the user has been registered by checking the user's Public User Identities (PUI), and by assigning the server to the S in the request. - The host name of the CSCF is compared with the host name of the S-CSCF registered by the user stored in the HSS, and it is checked whether the registered S-CSCF is inconsistent with the S-CSCF assigned last time.
  • the HSS finds that the S-CSCF registered by the user changes, it may not return an error response, but directly assigns a new S-CSCF to the user, returns a successful response, and sends an RTR request to the original S-CSCF.
  • FIG. 2 is a flowchart of a process for successfully registering a user in the case of a change of the S-CSCF according to an embodiment of the present invention, and describes an improved registration process, in particular, a process of changing the S-CSCF in the registration process. Includes the following steps: 5201, the user successfully registers in the S-CSCF2;
  • the user switches to the S-CSCF1 to register successfully, and the user registration status on the HSS is also associated with the S-CSCF1; S203, the user's new registration request is sent to the P-CSCF.
  • I-CSCF; S204, the I-CSCF forwards the registration request to the S-CSCF1 after querying the HSS;
  • S-CSCF1 does not respond due to a link interruption or other failure, or returns an error response of 3xx or 408;
  • the I-CSCF reselects the S-CSCF, and sends a registration request to the S-CSCF2;
  • the S-CSCF2 Since the user is registered in the S-CSCF2, the S-CSCF2 has the user data and the authentication data information of the user, and therefore does not send the multimedia authentication request MAR to the HSS to obtain the authentication data, and directly sends the 401 authentication challenge response;
  • the S-CSCF2 sends a 401 authentication challenge response to the I-CSCF;
  • the I-CSCF forwards the 401 authentication challenge response to the P-CSCF, and the P-CSCF forwards the request to the user equipment UE;
  • the user's registration request carrying the challenge response is sent to the I-CSCF through the P-CSCF;
  • the I-CSCF forwards the registration request to the S-CSCF2;
  • the sending server assigns the request SAR to the S-CSCF2
  • the home subscriber server HSS receives the server assignment request SAR sent by the S-CSCF, checks that the user's PUI has been registered, and the registered S-CSCF and the last registration assignment
  • the S-CSCF is inconsistent and determines a transmission failure response.
  • the HSS checks the user registration by comparing the host name of the S-CSCF in the SAR request with the host name of the S-CSCF registered by the user stored in the HSS. Whether the S-CSCF has changed;
  • the HSS may not directly return an error response, directly assign a new S-CSCF to the user, return a successful response, and send an RTR. Request to the original S-CSCF.
  • the HSS sends a server assignment failure response to the S-CSCF, and the failure code indicates that the S-CSCF inconsistency occurs; different from the prior art, the server assignment failure response sent by the HSS in the step includes indicating that the S-CSCF is changed. Related content, such as failure code.
  • the S-CSCF receives the server assignment failure response, and the failure code indicates that the S-CSCF change has occurred, and the MAR authentication process is re-initiated if the S-CSCF originally assigned by the user is inconsistent;
  • the S-CSCF needs to re-initiate the MAR authentication process, and after the MAR request succeeds, the S-CSCF challenges the UE 401.
  • the S-CSCF initiates a MAR request to the HSS to obtain user authentication information
  • the HSS receives the MAR request, and saves the new S-CSCF host name carried in the request.
  • the HSS record After checking the S-CSCF change, the HSS record includes the change information of the original S-CSCF host name, and returns the successful multimedia.
  • the authentication response MAA carries the user authentication information in the response; thus, after processing by the multimedia authentication request MAR, the HSS does not return an error response because the S-CSCF is inconsistent when the subsequent processing server assigns the request SAR.
  • the S-CSCF2 sends a 401 authentication challenge response to the I-CSCF;
  • the I-CSCF forwards the 401 authentication challenge response to the P-CSCF, and the P-CSCF forwards the packet to the user equipment UE;
  • S220 the user's registration request carrying the challenge response is sent to the I-CSCF through the P-CSCF;
  • the I-CSCF forwards the registration request to the S-CSCF2;
  • the sending server assigns the request SAR to the S-CSCF2
  • the home subscriber server HSS receives the server assignment request SAR sent by the S-CSCF, because in the previous MAR process, the user-associated S-CSCF has been changed to the new S-CSCF2, and the S-CSCF does not refuse because of the inconsistency. , HSS returns a successful SAA response, which is carried in the response. Household data
  • the registration is successful, and the S-CSCF2 sends a registration success response to the I-CSCF;
  • the I-CSCF forwards the registration success response to the P-CSCF, and the P-CSCF forwards the message to the user.
  • the HSS checks that the registration S-CSCF has changed, sends a network logout request RTR to the original S-CSCF, and notifies the original S-CSCF1 that the user has been assigned to another new one.
  • S-CSCF the HSS may also use other requests or methods to notify the original S-CSCF that the user has been assigned to another new S-CSCF.
  • the HSS sends a network logout request RTR to the original S-CSCF1;
  • the S-CSCF1 receives the network logout request RTR of the HSS, indicating that the user has assigned a new S-CSCF, deletes the local user data information of the user, or may not delete the user data according to the local policy configuration, but only marks The user has already registered with a new S-CSCF.
  • S-CSCF1 sends a network logout response RTA to the HSS. If the HSS does not receive the RTA response of the S-CSCF due to a failure such as an S-CSCF link interruption, it may attempt to send an RTR request again after a certain time to notify the original S-CSCF that the user has been assigned to another new S-CSCF. Until the RTA response is received or the upper limit of the number of retransmissions is exceeded. Also, when the HSS does not receive an RTA response, the interval between attempts to send an RTR request again and the number of attempts to retransmit can be determined based on the local configuration.
  • FIG. 3 is a schematic diagram of a system for processing a change of an S-CSCF according to an embodiment of the present invention.
  • the present invention only lists components related to the present invention in the description of the system framework, and the entire IMS system framework is not specifically described one by one; The message interaction process between the network elements when the user registers with the IMS network is no longer described. For details, please refer to the description in the FIG. 1 and FIG. 2 of the present invention. As shown in FIG.
  • P-CSCF proxy call session control function in the IMS network, called P-CSCF, service call session control function S-CSCF (including first service call session control) Function S-CSCF1 and second service call session control function S-CSCF2), query call session control function I-CSCF, home subscriber server HSS, where:
  • the HSS is set to: After receiving the server assignment request SAR sent by the S-CSCF2, if it is checked that the user has been registered, and the registered S-CSCF2 is inconsistent with the last registered S-CSCF1, the sending server assignment fails. Responding to S-CSCF2, and indicating in the server assignment failure response that the S-CSCF registered by the user has been changed from S-CSCF1 to S-CSCF2; and, after receiving the MAR request sent by the S-CSCF2, saving the MAR The host name of the S-CSCF2 carried in the request, and the change information including the host name of the S-CSCF1 is recorded, so as to cooperate with the S-CSCF2 to complete the subsequent registration process of the user;
  • the S-CSCF2 is configured to: after receiving the server assignment failure response, send a multimedia authentication request MAR to the HSS according to the indication;
  • the P-CSCF is configured to: perform forwarding of an interactive message between the UE and the IMS network, and the like;
  • the I-CSCF is set to: forward the registration request of the user to the available S-CSCF by querying the HSS, and forward the message from the IMS network to the UE through the P-CSCF.
  • the HSS is further configured to: after completing the subsequent user registration process, send a network logout request to the S-CSCF1, to notify the S-CSCF1 that the S-CSCF registered by the user is changed;
  • the S-CSCF1 is configured to: after receiving the network logout request, delete the local user data of the user, or retain the user data and mark the change of the S-CSCF registered by the user; and send a network logout response to the HSS.
  • the HSS is further configured to: after receiving the network logout request, fail to receive the network logout response, send the network logout request again after a certain time, until a network logout response is received or the number of retransmissions is exceeded The upper limit.
  • the home subscriber server HSS as described above may include a receiving unit 41, an inspecting unit 42 and a transmitting unit 43 connected in sequence, as shown in FIG. 4, where:
  • the receiving unit 41 is configured to: receive a server assignment request sent by the service proxy call session control function S-CSCF;
  • the checking unit 42 is configured to: according to the server assignment request received by the receiving unit 41, if it is checked that the UE is The registration status of the HSS is registered, and the S-CSCF2 that is registered this time is inconsistent with the S-CSCF1 that was last registered, the notification unit 43 is notified;
  • the sending unit 43 is configured to: according to the checking unit 42 Notifying that the sending server assigns a failure response to the S-CSCF2, and in the server assignment failure response, indicates that the S-CSCF registered by the user has changed.
  • the checking unit 42 may be configured to: check the user registration by comparing the host name of the S-CSCF in the server assignment request with the host name of the S-CSCF registered by the user saved in the HSS. Whether the S-CSCF is inconsistent with the previously registered S-CSCF.
  • the sending unit 43 may be further configured to: after the HSS receives the multimedia authentication request MAR request sent by the S-CSCF2, and complete the subsequent user registration process, send a network logout request to the S-CSCF1, and notify the S-CSCF1 The S-CSCF registered by this user has changed.
  • the sending unit 43 may be further configured to: after receiving the network logout request, if the network logout response sent by the S-CSCF1 is not received, send the network logout request again after a certain time, until the receiving Go to the network logout response or exceed the upper limit of the number of retransmissions.
  • the prior art there is a defect in the registration process when the S-CSCF is changed. Since the HSS finds that the S-CSCF registered by the user is inconsistent with the S-CSCF of the last registration, the HSS returns in the server assignment request. Error response, the prior art does not further process such a process error, the direct registration fails, resulting in unsuccessful user registration, unable to use the service; in the present invention, by improving the user registration process, the S-CSCF change situation is increased.
  • the MAR authentication process is re-initiated to achieve the purpose that the user can register to successfully use the network service.
  • the present invention provides a method and system for processing an S-CSCF change in an IMS network.
  • the MAR authentication is re-initiated by using the S-CSCF.
  • the method of the process avoids the defect that the user cannot register to be unable to use the network service due to the change of the S-CSCF; at the same time, the user is also notified of the data in the IMS network by notifying the original S-CSCF of the change of the S-CSCF. consistency.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • General Business, Economics & Management (AREA)
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Abstract

La présente invention concerne un procédé et un système de traitement d'une altération de la fonction de service de contrôle de session d'appel (S-CSCF) dans un réseau de sous-système multimédia IP, ledit procédé comprenant les étapes suivantes : si après avoir reçu une requête d'attribution de serveur émanant d'une fonction S-CSFC le serveur d'abonné résidentiel (HSS) détecte que l'état d'enregistrement d'un utilisateur dans le serveur HSS est enregistré et que la fonction S-CSCF2 dans laquelle l'utilisateur s'enregistre à ce moment ne correspond pas à la fonction S-CSCF1 dans laquelle l'utilisateur s'est enregistré et a reçu une attribution la fois précédente, le serveur HSS envoie à la fonction S-CSCF2 un accusé de réception d'échec d'attribution de serveur est il est indiqué dans l'accusé de réception d'échec d'attribution de serveur que la fonction S-CSCF2 dans laquelle l'utilisateur s'enregistre est altérée ; et après réception de l'accusé de réception d'échec d'attribution de serveur, s'il est indiqué dans l'accusé de réception d'échec que la fonction S-CSCF est altérée, la fonction S-CSCF2 envoie une requête d'autorisation multimédia (MAR) au serveur HSS. La présente invention évite l'inconvénient qui réside en ce qu'un utilisateur ne peut pas s'enregistrer et ne peut donc pas utiliser un service de réseau en raison d'une altération de la fonction S-CSCF, et assure à l'utilisateur une cohérence des données sur l'ensemble d'un réseau IMS.
PCT/CN2010/073508 2009-06-04 2010-06-03 Procédé et système de traitement d'une altération de la fonction de service de contrôle de session d'appel (s-cscf) dans un réseau de sous-système multimédia ip (ims) Ceased WO2010139279A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910203284.3A CN101577914B (zh) 2009-06-04 2009-06-04 一种ims网络中处理s-cscf变更的方法及系统
CN200910203284.3 2009-06-04

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WO2010139279A1 true WO2010139279A1 (fr) 2010-12-09

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CN115834366A (zh) * 2022-12-21 2023-03-21 中国电信股份有限公司 应用服务器故障定位方法及相关设备
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