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Method for indicating a UE that it must register

  • US 7,606,910 B2
  • Filed: 05/09/2001
  • Issued: 10/20/2009
  • Est. Priority Date: 05/09/2001
  • Status: Expired due to Term
First Claim
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1. A method, comprising:

  • receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;

    checking, in a network control device, whether the user is registered to a network or not, by referring to information about a registration status of the user stored in a home subscriber server or in the network control device being a proxy call state control function or a serving call state control function, wherein the network offers services to registered users; and

    when the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden message;

    wherein the warn information triggers an automatic registration in the network device of the user, in which the network device of the user sends a register request to the network control device automatically when the network device of the user receives the response message.

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