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Device for controlling access of subscriber terminals of a CS domain to services of an IMS communication network

  • US 8,078,166 B2
  • Filed: 02/20/2006
  • Issued: 12/13/2011
  • Est. Priority Date: 02/23/2005
  • Status: Active Grant
First Claim
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1. A Device for controlling access of a terminal, connected to a Circuit Switched (CS) domain of a mobile communication network comprising at least one Mobile Switching Center (MSC), the device to control subscribed services of an IP Multimedia Subsystem (IMS) communication network including a Serving Call Session Control Function (S-CSCF) module, said device coupled to said MSC and to said IMS network, comprising:

  • a Gateway Mobile Switching Center (GMSC) module configured to manage setting up of a call to the terminal;

    a Media Gateway Controller Function (MGCF) module configured to convert messages from the CS domain into messages according to an IP Multimedia Subsystem (IMS) signaling protocol intended for the S-CSCF module;

    an Interrogating Call Session Control Function (I-CSCF) module configured to initiate subscriber registration with the S-CSCF module, anda Proxy Call Session Control Function (P-CSCF) module emulator and a user agent (UA1) configured to cooperate with the terminal to instruct said I-CSCF module to initiate the subscriber registration with the S-CSCF module, the P-CSCF module being further configured to send a call request via said MGCF module to the S-CSCF module if the subscriber attempts to set-up a call via the terminal, and to instruct said GMSC module, via said MGCF module, to manage the call set-up on the CS domain side if the terminal receives a request to set-up the call from the S-CSCF module.

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