×

Method for performing inter-system handovers in a mobile communication system

  • US 7,640,036 B2
  • Filed: 08/11/2005
  • Issued: 12/29/2009
  • Est. Priority Date: 05/11/2005
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method, comprising:

  • receiving a session set-up message from a mobile station to a call state control function;

    determining inter-system handover support of the mobile station in said call state control function;

    providing said session set-up message to a first call control node in response to said inter-system handover support of the mobile station;

    requesting an allocation of a first media gateway from said first call control node;

    receiving a handover request to said first call control node from said mobile station via said call state control function;

    determining in said first call control node an identity of a second call control node based on cell information in said handover request;

    sending the handover request from said first call control node to said second call control node;

    receiving a handover number to said first call control node from said second call control node in response to said handover request;

    routing a handover session from said first call control node to said second call control node using said handover number;

    receiving an answer message to said first call control node from said second call control node;

    receiving a handover completion message to said first call control node from said call state control function; and

    requesting a removing of at least one packet switched media bearer from said media gateway.

View all claims
  • 10 Assignments
Timeline View
Assignment View
    ×
    ×