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System and method for performing an inter mobile system handover using the internet telephony system

  • US 6,424,638 B1
  • Filed: 05/21/1999
  • Issued: 07/23/2002
  • Est. Priority Date: 05/21/1999
  • Status: Expired due to Term
First Claim
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1. A telecommunications system for performing a handover of a call associated with a mobile station between different wireless systems, comprising:

  • first and second wireless systems, said first wireless system being in wireless communication with said mobile station for said call, said first wireless system determining that said handover of said call needs to be performed to said second wireless system; and

    an Internet Gatekeeper within an Internet system for receiving an identity message from said first wireless system, determining an identity of said second wireless system for said handover and sending at least said identity of said second wireless system back to said first wireless system, said handover of said call being performed from said first wireless system to said second wireless system via said Internet system.

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