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Mobility management for terminals with multiple subscriptions

  • US 6,556,820 B1
  • Filed: 12/16/1998
  • Issued: 04/29/2003
  • Est. Priority Date: 12/16/1998
  • Status: Expired due to Term
First Claim
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1. A method for managing mobile terminals having multiple subscriptions in a mobile environment, comprising:

  • allocating a Universal Mobile Telecommunications Standard (UMTS) subscriber identity module for each subscription associated with a mobile terminal, each UMTS subscriber identity module (USIM) being identified by an identification code (USIM-ID) and having a unique set of authentication parameters;

    performing a single mobility management procedure for multiple subscriptions, the single mobility management procedure being initiated by providing a single message and including a location area update procedure, the location area update procedure providing a single location area update request message;

    sending authentication parameters from a network to service providers;

    analyzing the authentication parameters to determine valid subscriptions for each UMTS subscriber identity module;

    providing authentication data from the service providers to the network, the authentication data being used by the network for authenticating each UMTS subscriber identity module; and

    sending a single authentication request to a mobile terminal, the single authentication request including authentication parameters for authentication of all UMTS subscriber identity modules identified by identification codes provided in the single location area update request message.

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