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Mobile station assisted soft handoff in a CDMA cellular communications system

  • US 5,640,414 A
  • Filed: 04/11/1994
  • Issued: 06/17/1997
  • Est. Priority Date: 03/05/1992
  • Status: Expired due to Term
First Claim
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1. In a cellular communication system in which a mobile user communicates with other users via at least one base station, wherein each of a plurality of base stations within said system transmits a unique pilot signal, a mobile station transceiver comprising:

  • a pilot signal strength measurement circuit for measuring strength of base station transmitted pilot signals and for generating a first signal strength message when one or more of said measured pilot signals, from base stations not currently in communication with said mobile station transceiver, exceed a first predetermined level;

    a mobile station transmitter for transmitting said first signal strength message to at least one of said base stations with which said mobile user is currently in communication; and

    a mobile station receiver for receiving a first direction signal from at least one of said base stations with which said mobile user is currently in communication;

    wherein in response to said first received direction signal communication is established between said mobile station transceiver and at least one of said base stations from which were received said measured pilot signals exceeding said first predetermined level.

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