WO2007041957A1 - Méthode et système de vérification de la cohérence de nom de fonctions de contrôle d’état d’appel de service - Google Patents

Méthode et système de vérification de la cohérence de nom de fonctions de contrôle d’état d’appel de service Download PDF

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Publication number
WO2007041957A1
WO2007041957A1 PCT/CN2006/002668 CN2006002668W WO2007041957A1 WO 2007041957 A1 WO2007041957 A1 WO 2007041957A1 CN 2006002668 W CN2006002668 W CN 2006002668W WO 2007041957 A1 WO2007041957 A1 WO 2007041957A1
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WO
WIPO (PCT)
Prior art keywords
cscf
registration
user
server
name
Prior art date
Application number
PCT/CN2006/002668
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English (en)
Chinese (zh)
Inventor
Chunyan Ma
Bin Yu
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007041957A1 publication Critical patent/WO2007041957A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H04L61/4588—Network directories; Name-to-address mapping containing mobile subscriber information, e.g. home subscriber server [HSS]
    • 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
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • 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

Definitions

  • the present invention relates to an IP Multimedia Subsystem (IMS) network technology, and more particularly to a method for checking the consistency of a Service Call Status Control Function (S-CSCF) name.
  • IMS IP Multimedia Subsystem
  • S-CSCF Service Call Status Control Function
  • the S-CSCF entity sends a User Registration/Deregistration Request (SAR) message to the Home Subscriber Server (HSS) through the Cx interface to perform a registration/logout operation for the user, the registration including initial registration and re-registration.
  • SAR User Registration/Deregistration Request
  • HSS Home Subscriber Server
  • the HSS After receiving the SAR message, the HSS performs the corresponding operation according to the value of the Server Assignment Type parameter carried in the message.
  • the existing protocol defines the following operations: If the Server Assignment Type parameter value is registered (REGISTRATION) Or RE REGISTRATION, the HSS sets the registration status of the user to registered, clears the pending flag, and delivers the user subscription data to the S-CSCF that initiated the SAR message.
  • the HSS saves the service call state control function name (S-CSCF Name ) carried in the SAR message, sets the registration status of the user to unregistered (unregistered), and delivers the status to the S-CSCF corresponding to the name.
  • S-CSCF Name service call state control function name
  • Server Assignment Type parameter value is timeout undo registration ( TIMEOUT DEREGISTRATION ), user undo registration ( USER DEREGISTRATION ), excessive data undo registration ( DEREGISTRATION TOO MUCH DATA ), or administrative cancellation registration ( ADMINISTRATIVE DEREGISTRATION ), HSS sets the user's registration status. To not register (not registered), and clear the saved S-CSCF Nams.
  • the HSS can perform any of the following operations as needed: Set the user's registration status to unregistered and retain the currently saved S-CSCF Name. Second, set the user's registration status to not registered and clear the currently saved S-CSCF Name.
  • the HSS sets the user's registration status to not registered and clears the user's ending flag.
  • the HSS sends the user subscription data to the S-CSCF that sends the SAR message.
  • the S-CSCF sends an S-CSCF Name to the HSS to indicate to the HSS the S-CSCF that issued the SAR message.
  • the HSS compares the S-CSCF Name carried in the SAR message with the saved S-CSCF Name if it has saved the S-CSCF Name. If not, the HSS returns an error response to the S-CSCF that initiated the SAR message.
  • the protocol specifies that the result code (Result-Code) in the response message returned by the HSS to the S-CSCF is DIAMETER UNABLE TO COMPLY, indicating that the response is an error response.
  • the Server Assignment Type parameter value is other values, you can The value of the Experimental Result Code is DIAMETER ERROR IDENTITY ALREADY REGISTERED , indicating that the response is an error response.
  • the main object of the present invention is to provide a method for checking the consistency of S-CSCF names so that the HSS can perform different operations according to the value of the Server Assignment Type parameter.
  • the HSS can perform different operations according to the Server Assignment Type parameter values.
  • a service call state control function S-CSCF name consistency check method includes:
  • the home subscriber network server After the home subscriber network server receives the registration/deregistration request message sent by the S-CSCF, it determines that the server assignment type parameter value carried in the registration/logout request message is No as an unregistered user;
  • the home subscriber server saves the S-CSCF name carried in the registration/deregistration request message, and replies a successful response to the S-CSCF; if it is not an unregistered user, the home subscriber server determines to save itself. Whether the S-CSCF name is consistent with the S-CSCF name carried in the registration/deregistration request message, and if it is consistent, the subsequent service processing is performed; if not, the home subscription user server sends the S-CSCF to the registration/deregistration request message. Reply to the error response and the process ends.
  • a service call state control function S-CSCF name consistency check system the system includes a home subscription subscriber server and an S-CSCF;
  • the S-CSCF sends a registration/deregistration request message to the home subscriber server; the home subscriber server is configured to determine whether the server assignment type parameter value carried in the registration/deregistration request message is an unregistered user;
  • the home subscriber server saves the S-CSCF name carried in the registration/deregistration request message, and replies a successful response to the S-CSCF; if it is not an unregistered user, the home subscriber server determines to save itself. Whether the S-CSCF name is consistent with the S-CSCF name carried in the registration/deregistration request message, and if it is consistent, the subsequent service processing is performed; if not, the home subscription user server sends the S-CSCF to the registration/deregistration request message. Reply to the error response.
  • the I-CSCF selects the S-CSCF for the user based on the capability set information sent by the HSS. After that, the selected S-CSCF informs the HSS of its own information through the MAR message, so that the HSS can save the S-CSCF Name of the user, thereby ensuring the consistency of the S-CSCF Name.
  • the I-CSCF obtains the S-CSCF Name of the user from the HSS through the UAR message, and the S-CSCF initiates the SAR message to the HSS, thereby ensuring the consistency of the S-CSCF Name.
  • the HSS checks that the S-CSCF Name in the SAR message is inconsistent with the S-CSCF Name saved by itself, it is determined that the current SAR message is sent by the illegal S-CSCF. In this case, the HSS will return an error response to prevent the illegal S-CSCF registration/logout request from being executed.
  • the I-CSCF When an unregistered user makes a call, if the assigned S-CSCF is unavailable, the I-CSCF reselects an S-CSCF for the user and performs an S-CSCF handover.
  • the HSS learns that the user has performed the S-CSCF switch by the SAR message, and updates the S-CSCF Name of the user, so that the unregistered user can normally switch to the reselected S-CSCF to perform the subsequent call process. It can be seen from the above process that the method and system of the present invention can provide basic services such as registration/logout and call for the user when performing S-CSCF handover, thereby improving the quality of network communication.
  • 1 is a processing flow of initial registration of a user in a first embodiment of the present invention
  • FIG. 2 is a processing flow of a user re-registration/deregistration in the second embodiment of the present invention
  • FIG. 3 is a processing flow of an unregistered user as a called party in the third embodiment of the present invention. Mode for carrying out the invention
  • the HSS after receiving the SAR message sent by the S-CSCF to the user, the HSS reads the value of the Server-Assignment-Type parameter in the message.
  • the HSS further determines whether the S-CSCF Name of the user is saved. If not, the HSS saves the S-CSCF Name in the SAR message. And change the user status, The user subscription data is then sent to the S-CSCF that initiated the SAR message, and the Result-Code parameter is set to DIAMETER SUCCESS in the SAA response message returned to the S-CSCF.
  • the HSS determines that the user has performed the S-CSCF handover, and uses the S-CSCF in the SAR message. Replace the original saved S-CSCF Name, and then send the user subscription data to the S-CSCF that initiated the SAR message, and set the Result-Code in the response message to DIAMETER SUCCESS, and return it to the S-CSCF; if they are consistent,
  • the HSS performs subsequent normal service processing, which is not described here.
  • the HSS needs to determine whether the saved S-CSCF Name is consistent with the S-CSCF Name in the SAR message. If they are consistent, the subsequent normal service processing is performed, and is not described here. Otherwise, the HSS returns an error response to the S-CSCF that initiated the SAR message, ie the Experimental Result Code parameter in the response message is set to DIAMETER ERROR IDENTTITY ALREADY REGISTERED
  • Server Assignmet Type parameter value is not UNREGISTERED USER refers to: Server-Assignment-Type parameter values are REGISTRATION, RE REGISTRATION, NO ASSIGNMENT, TIMEOUT DEREGISTRATION, USER DEREGISTRATION, DEREGISTRATION TOO MUCH DATA, ADMINISTRATIVE DEREGISTRATION, TIMEOUT DEREGISTRATION STORE SERVER NAME USER DEREGISTRATION STORE SERVER NAME, AUTHENTICATION FAILURE, or AUTHENTICATION TIMEOUT.
  • Server-Assignment-Type parameter values are REGISTRATION, RE REGISTRATION, NO ASSIGNMENT, TIMEOUT DEREGISTRATION, USER DEREGISTRATION, DEREGISTRATION TOO MUCH DATA, ADMINISTRATIVE DEREGISTRATION, TIMEOUT DEREGISTRATION STORE SERVER NAME USER DEREGISTRATION STORE SERVER NAME, AUTHENTICATION FAILURE, or AUTHENTICATION
  • Embodiment 1 The initial registration process of the user is as shown in FIG. 1 .
  • Step 101 The user terminal (UE) sends a Register message to the Proxy Call Status Control Function (P-CSCF), and the P-CSCF forwards the Register message to the Call Status Control Function (I-CSCF).
  • P-CSCF Proxy Call Status Control Function
  • I-CSCF Call Status Control Function
  • Steps 102 to 103 The I-CSCF sends a registration status inquiry request (UAR) message to the HSS. After receiving the UAR message, the HSS sends the capability set information of the user to the I-CSCF by using a registration status inquiry response (UAA) message.
  • UAR registration status inquiry request
  • UAA registration status inquiry response
  • the HSS since the HSS does not store the S-CSCF Name of the user, the HSS determines that the user is the initial registration, and the HSS sends the capability set information of the user to the I-CSCF for subsequent processing.
  • Step 104 The I-CSCF selects an S-CSCF that satisfies the requirement for the user according to the capability set information, and sends a Register message to the selected S-CSCF.
  • the authentication information refers to an authentication vector, such as an authentication quintuple composed of five data of RAND, AUTN, XRES, CK, and IK.
  • the HSS updates the S-CSCF Name saved by itself, that is, sets the S-CSCF Name saved by the S-CSCF Name in the MAR message, thereby ensuring
  • the S-CSCF Name carried by the SAR message sent by the S-CSCF is the same as the saved S-CSCF Name of the HSS.
  • Steps 107-109 The S-CSCF forwards the 401 Unauthorised message to the UE through the I-CSCF and the P-CSCF, and the 401 Unauthorised message is a SIP message specified by the protocol.
  • the 401 Unauthorised message contains the RAND and AUTN required to calculate the authentication response (RES).
  • Step 110 After calculating the RES according to the RAND and the AUTN, the UE resends the Register message to the I-CSCF through the P-CSCF, where the Register message carries the RES.
  • Steps 114 to 115 The S-CSCF receives the Register message, takes out the RES for authentication, and after the authentication succeeds, registers the user with the SAR/SAA message to the HSS.
  • the S-CSCF Name carried in the legal SAR message is the same as the S-CSCF Name stored in the HSS. Therefore, when processing the SAR message, the HSS returns an error response to the S-CSCF if it checks that the S-CSCF Name contained in the message is inconsistent with its own saved.
  • Step 116 After the registration is successful, the S-CSCF sends a 200 OK message to the UE through the I-CSCF and the P-CSCF, and the initial registration process of the UE is completed.
  • Embodiment 2 The process of user re-registration or cancellation (re-registration/de-registration) is shown in FIG. 2.
  • Step 201 The user terminal sends a Register/Logout (Register) message to the P-CSCF, and the P-CSCF forwards the Register message to the I-CSCF.
  • the Register message carries parameters for distinguishing whether the message is to perform a registration operation or a logout operation.
  • Step 202 204 The I-CSCF obtains the routing information of the user from the HSS by using a UAR/UAA message, and sends the Register message to the corresponding S-CSCF according to the S-CSCF Name in the routing information.
  • the HSS since the S-CSCF Name of the user is stored in the HSS, the HSS determines that the user is not the initial registration, and the HSS will use the S-CSCF Name of the user. Send to the I-CSCF for subsequent processing.
  • Steps 205-206 After receiving the Register message, the S-CSCF re-registers/deregisters the user through the SAR/SAA message to the HSS. At this time, if the HSS checks that the S-CSCF Name carried in the SAR message is different from the S-CSCF Name saved by itself, an error response is returned.
  • Steps 207 ⁇ 209 After the re-registration/deregistration is successful, the S-CSCF returns a 200 OK message to the user terminal.
  • the I-CSCF determines whether the S-CSCF is available before the registration message is sent to the S-CSCF. The process is the same as the prior art, and is not described here. If the S-CSCF is unavailable, the I-CSCF then performs an initial registration process, that is, the I-CSCF sends a UAR message to the HSS again to obtain the capability set information of the user, and reselect the S-CSCF for the user. Embodiment 1. If the S-CSCF is available, the subsequent process shown in Figure 2 continues.
  • the logout is caused by the authentication failure, even if the I-CSCF finds that the currently allocated S-CSCF is unavailable, it does not reassign an S-CSCF to the user. That is to say, the S-CSCF does not change, and the S-CSCF Name carried in the subsequent SAR message and the saved S-CSCF Name of the HSS should be consistent. Therefore, when the S-CSCF Name carried in the SAR message is inconsistent with the saved S-CSCF Name of the HSS, the HSS rejects the logout request.
  • Embodiment 3 The process of making a called call by an unregistered user, as shown in FIG.
  • Steps 301 ⁇ 302 The I-CSCF receives an INVITE message calling an unregistered user in the network, and sends a User Location Inquiry Request (LIR) message to the HSS.
  • LIR User Location Inquiry Request
  • Step 303 The HSS replies to the I-CSCF with a User Location Query Response (LIA) message, where the LIA message includes the capability set information of the user.
  • LIA User Location Query Response
  • Steps 304 to 305 The I-CSCF selects the content that meets the requirement according to the capability set information.
  • the S-CSCF and sends an INVITE message to the selected S-CSCF.
  • Step 306 After receiving the INVITE message, the S-CSCF performs user registration through the SAR message to the HSS.
  • the SAR message includes the S-CSCF Name, and the Server Assignmet Type parameter value in the message is UNREGISTERED USER.
  • Step 307 After receiving the SAR message, the HSS obtains the S-CSCF Name in the SAR message, and returns an SAA message to the S-CSCF to complete the user registration.
  • the S-CSCF Name in the SAR message is selected by the I-CSCF according to the capability set information. If the S-CSCF Name in the SAR message is inconsistent with the saved S-CSCF Name of the HSS, it means that the saved S-CSCF Name of the HSS is not available at this time, so the HSS will send the S-CSCF to the SAR message.
  • the SAA message is replied, and the user terminal is switched to the S-CSCF selected by the I-CSCF to complete the user subscription data delivery process of the unregistered user.
  • the method and system for checking the consistency of the S-CSCF name during registration/deregistration of the present invention perform different operations according to the value of the Server Assignment Type parameter, and prevent the registration/deregistration request of the illegal S-CSCF. While being executed, it is ensured that the unregistered user can perform the S-CSCF switching normally.

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

Abstract

Méthode et système de vérification de la cohérence de nom des S-CSCF, la méthode comprenant : le serveur d’abonné particulier reçoit le message de requête d’inscription/désinscription et détermine si la valeur du paramètre “ type d’affectation de serveur ” dudit message de requête d’inscription/désinscription est “ UTILISATEUR NON INSCRIT ” ; si cela est le cas, le serveur d’abonné particulier sauvegarde le nom S-CSCF transporté par le message de requête d’inscription/désinscription et envoie une réponse OK au S-CSCF ; sinon, le serveur d’abonné particulier détermine si le nom S-CSCF qu’il stocke est identique au nom S-CSCF transporté par le message de requête d’inscription/désinscription et si ce n’est pas le cas, le serveur d’abonné particulier retourne une réponse d’erreur et le processus se termine. Des opérations variées sont mises en œuvre pour la méthode et le système selon l’invention, en fonction de la valeur du paramètre “ type d’affectation de serveur ” et, par conséquent, la transmission correcte des S-CSCF d’utilisateurs non inscrits peut être garantie.
PCT/CN2006/002668 2005-10-14 2006-10-11 Méthode et système de vérification de la cohérence de nom de fonctions de contrôle d’état d’appel de service WO2007041957A1 (fr)

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CN200510112950.4A CN100512295C (zh) 2005-10-14 2005-10-14 用户注册/注销时服务cscf名称的一致性检查方法
CN200510112950.4 2005-10-14

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US9560084B2 (en) 2009-03-19 2017-01-31 Telefonaktiebolaget Lm Ericsson (Publ) Reallocation of serving proxy function in IMS
CN108833411A (zh) * 2018-06-20 2018-11-16 上海市共进通信技术有限公司 应对voip注册劫持的方法

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