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Mechanism to allow authentication of terminated SIP calls

  • US 7,484,240 B2
  • Filed: 07/13/2001
  • Issued: 01/27/2009
  • Est. Priority Date: 07/13/2001
  • Status: Expired due to Fees
First Claim
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1. An apparatus, comprising:

  • a transmitter configured to send, during a subscriber equipment terminated call, a session invitation message to a subscriber equipment, the session invitation message comprising authentication information;

    a determiner configured to determine whether a verification of the authentication is required;

    a processor configured to,if the verification is not required,forward a scheduled result to a network control element by including the scheduled result into the session invitation message, and,if the network control element has to perform the verification,receive the scheduled result from another network control element, wherein the scheduled result is included in the session invitation message,extract the scheduled result from the session invitation message,forward the session invitation message without the scheduled result to the subscriber equipment,verify an authentication result with the scheduled result, andrepeat the verification for a predetermined number of times, wherein different authentication information are used.

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