System and Method for Processing Packet Domain Signal

Abstract

Embodiments of the present invention disclose a system and a method for processing a packet domain service signal, which enable a terminal that does not support an access control protocol of an Internet Protocol Multimedia Subsystem (IMS) to access the IMS and acquire the services in the IMS. An AGCF is added for shielding the differences of the users on the basis of the IMS defined in the 3 GPP R5/R6 standard, specifically, a PSTN/ISDN user accesses an AGF first, accesses the IMS through an agent function of the AGCF, and the AGCF also manages and controls the AGF. Control of the PSTN/ISDN services may be implemented in the AGCF, or in an AS added to the IMS, or the control of basic services and supplementary services may be implemented in the AGCF while the control of value-added services may be implemented in the AS.

1 . A system for processing a packet domain service signal, the system comprising:
 an access gateway function;   an access gateway control function for implementing access management and call control for an access gateway function, and for enabling a user equipment of a Public Switched Telephone Network (PSTN) or a user equipment of Integrated Services Digital Network (ISDN) which accesses the access gateway control function through the access gateway function to access a Call Session Control Function (CSCF) in an Internet Protocol Multimedia Subsystem (IMS), wherein the CSCF is connected with a Media Gateway Control Function (MGCF) separate from the access gateway control function.   
   
   
       2 . The system of  claim 1 , further comprising a first application server for providing a function of a service control of a Public Switched Telephone Network (PSTN)/Integrated Services Digital Network (ISDN) according to service triggering of the CSCF. 
   
   
       3 . The system of  claim 2 , wherein the first application server comprises means for implementing the service control of the PSTN/ISDN including control of a basic service, a supplementary service and an extended value-added service. 
   
   
       4 . The system of  claim 1 , wherein the access gateway control function implements a service control for the PSTN user equipment or the ISDN user equipment. 
   
   
       5 . The system of  claim 1 , wherein the access gateway control function implements access management and control of the access gateway function. 
   
   
       6 . The system of  claim 1 , wherein the access gateway function implements a function of conversion between a narrowband voice in a circuit domain and an Internet Protocol (IP) media flow in a packet domain, and a function of conversion between user interface signaling in the circuit domain and call control signaling in the packet domain. 
   
   
       7 . An access gateway control function entity, comprising:
 a module configured to acquire a private user identity and a public user identity according to an identity of an Access Gateway Function (AGF) and an identity of a user port when an outgoing call from a user reaches the module, the user being a Public Switched Telephone Network (PSTN) user or an Integrated Services Digital Network (ISDN) user, the module further configured to locate the identity of the AGF and the identity of the user port corresponding to the private user identity and the public user identity when an incoming call to the user reaches the module.   
   
   
       8 . The apparatus of  claim 7 , wherein the identity of the AGF and the identity of the user port correspond to the user; and wherein the private user identity and the public user identity is for accessing an Internet Protocol Multimedia Subsystem (IMS) domain for the user. 
   
   
       9 . The apparatus of  claim 7 , wherein the AGF has a unique identifier. 
   
   
       10 . The apparatus of  claim 7 , further comprising a second module for processing a basic service and a supplementary service of the PSTN/ISDN. 
   
   
       11 . The apparatus of  claim 7 , further comprising a third module for generating a charging request, and sending the charging request to a charging collection unit in the IMS. 
   
   
       12 . The apparatus of  claim 7 , further comprising a fourth module for implementing a registration and an authentication of the AGF. 
   
   
       13 . The apparatus of  claim 7 , further comprising a fifth module for converting between a Session Initiation Protocol (SIP) and an interface protocol of an interface through which the access gateway control function is connected to the access gateway function. 
   
   
       14 . The apparatus of  claim 7 , further comprising:
 a second module for processing a basic service and a supplementary service of the PSTN/ISDN;   a third module for generating a charging request, and sending the charging request to a charging collection unit in the IMS;   a fourth module for implementing a registration and an authentication of the AGF; and   a fifth module for converting between a Session Initiation Protocol (SIP) and an interface protocol of an interface through which the access gateway control function is connected to the access gateway function.   
   
   
       15 . A method, comprising:
 receiving an outgoing call from a user by an access gateway control function, the user being a Public Switched Telephone Network (PSTN) user or an Integrated Services Digital Network (ISDN) user; and   acquiring a private user identity and a public user identity according to an identity of an Access Gateway Function (AGF) and an identity of a user port, wherein the identity of the AGF and the identity of the user port correspond to the user, and the private user identity and the public user identity are for accessing an Internet Protocol Multimedia Subsystem (IMS) domain for the user.   
   
   
       16 . A method, comprising:
 receiving an incoming call to a user by an access gateway control function, the user being a Public Switched Telephone Network (PSTN) user or an Integrated Services Digital Network (ISDN) user, wherein the incoming call comprises a private user identity and a public user identity; and   locating an identity of an Access Gateway Function (AGF) and an identity of a user port corresponding to the private user identity and the public user identity, wherein the identity of the AGF and the identity of the user port correspond to the user.