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Mobile-synchronized handoff in a wireless communications system

  • US 5,444,766 A
  • Filed: 10/01/1993
  • Issued: 08/22/1995
  • Est. Priority Date: 10/01/1993
  • Status: Expired due to Term
First Claim
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1. In a wireless communications system, a method of coordinating a handoff of a call involving a mobile terminal from a first base station to a second base station, comprising the steps of:

  • transmitting a handoff coordination signal from the mobile terminal simultaneously to both the first base station which is presently transmitting the call to the mobile terminal and the second base station which is presently not transmitting the call to the mobile terminal;

    receiving the handoff coordination signal substantially simultaneously at both the first and the second base stations;

    in response to the receipt, the first base station ceasing to transmit the call to the mobile terminal at an instant in time; and

    in response to the receipt, the second base station commencing to transmit the call to the mobile terminal at effectively same said instant in time;

    whereby timing of the handoff is coordinated by the mobile terminal and is performed substantially simultaneously by both the first and the second base stations.

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