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Method and apparatus for instance identifier based on a unique device identifier

  • US 8,619,626 B2
  • Filed: 04/20/2009
  • Issued: 12/31/2013
  • Est. Priority Date: 07/09/2008
  • Status: Active Grant
First Claim
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1. A method of providing device identification (DevID) protection in a user equipment of network, comprising the steps of:

  • constructing, by a User Equipment (UE), an Instance ID derived from an International Mobile Equipment Identity (IMEI);

    performing a REGISTER request from a UE to a Proxy-Call Session Control Function (P-CSCF);

    forwarding, by the P-CSCF, the request to the Interrogating-C II Session Control Function (I-CSCF);

    making, by the I-CSCF, a request for information related to the Subscriber registration status by sending the private user identity, public user identity and visited domain name to an Home Subscriber Server (HSS);

    returning, by the HSS, the Serving-Call Session Control Function (S-CSCF) required capabilities to the I-CSCF;

    using, by the I-CSCF, the S-CSCF required capabilities information to select a suitable S-CSCF;

    forwarding, by the I-CSCF, the REGISTER request to the selected S-CSCF;

    challenging, by the S-CSCF, the registration request;

    forwarding, by the I-CSCF, the response to the P-CSCF;

    forwarding, by the P-CSCF, the response to the UE;

    resending, by the UE, the REGISTER request with authentication credentials;

    forwarding, by the P-CSCF, the request to the I-CSCF;

    making, by the I-CSCF, a request for information related to the Subscriber registration status by sending the private user identity, public user identity and visited domain name to an HSS;

    returning, by the HSS the S-CSCF required capabilities;

    using, by the I-CSCF, the information about the S-CSCF required capabilities to select a suitable S-CSCF;

    forwarding, by the I-CSCF, the REGISTER request to the selected S-CSCF;

    informing, by the S-CSCF, the HSS that the user has been registered;

    including, upon being requested by the S-CSCF, by the HSS the user profile in the response sent to the S-CSCF;

    constructing, by the S-CSCF acting as registrar, a Globally Routable User Agent (GRUU) based on the Instance ID;

    sending, by the S-CSCF sends a 200 (OK) response, including the GRUU, to the 1CSCF indicating that registration was successful;

    forwarding, by the I-CSCF, the 200 (OK) response to the P-CSCF indicating that registration was successful; and

    forwarding, by the P-CSCF, the 200 (OK) response to UE indicating that registration was successful.

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