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METHOD FOR IMPLEMENTING IP MULTIMEDIA SUBSYSTEM REGISTRATION

  • US 20080039081A1
  • Filed: 09/18/2007
  • Published: 02/14/2008
  • Est. Priority Date: 08/08/2005
  • Status: Active Grant
First Claim
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1. A method for implementing an Internet Protocol (IP) Multimedia Subsystem (IMS) registration, comprising:

  • receiving, by a Home Subscriber Server (HSS), an Multimedia Authentication Request (MAR) message from a Service Call Session Control Function (S-CSCF);

    wherein the S-CSCF is selected for a User Equipment (UE) when a first Register request is sent by the UE;

    recording, by the HSS, the current registration state of the UE, generating Authentication Vectors (AV) and sending the AVs to the S-CSCF;

    initiating, by the S-CSCF, an authentication challenge to the UE according to the AVs returned by the HSS;

    sending, by the UE, a second Register request to an Interrogating Call Session Control Function (I-CSCF), after the UE implements the authentication challenge;

    notifying, by the I-CSCF, the HSS of inquiring the subscriber registration state; and

    returning, by the HSS, an S-CSCF Name to the I-CSCF when the current registration state of the UE is an assigned S-CSCF state.

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