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Mobile radio communication device

  • US 5,774,810 A
  • Filed: 06/27/1996
  • Issued: 06/30/1998
  • Est. Priority Date: 06/27/1995
  • Status: Expired due to Term
First Claim
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1. The mobile radio communication system comprising:

  • a base station; and

    a mobile station connected by radio with the base station, and employing the time division multiple access system,wherein the mobile station has field intensity detection means that detects the field intensity of a signal transmitted by the base station,and synchronization establishment and maintenance control means whereby;

    at the commencement of communication with the base station asynchronous reception is performed of signals from the base station, and synchronization establishment control is conducted whereby a synchronization establishment operation with the base station is performed under the condition that the field intensity detected by the field intensity detection means exceeds a first threshold value; and

    , after establishment of synchronization with the base station by the synchronization establishment operation, a synchronization maintenance operation is conducted with the base station under the condition that the field intensity detected by the field intensity detection means exceeds a second threshold value smaller than the first threshold value.

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