×

Mobile radio telephone system

  • US 4,926,421 A
  • Filed: 10/18/1988
  • Issued: 05/15/1990
  • Est. Priority Date: 10/23/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. A mobile radio telephone system comprising:

  • a plurality of base stations disposed in contiguous cellular zones and equipped for communication on a single, common control channel and on a plurality of voice channels, each of said voice channels communicating a voice signal to a corresponding base station within its respective cellular zone;

    at least one mobile station equipped to access said common control channel when originating or answering a call from one of said base stations, to switch to one of said voice channels at the occurrence of the call, and to transmit a hand-off request on said common control channel if the quality of the voice signal becomes degraded during the call; and

    a line control unit for centralized control of said base stations, equipped to switch a call from one of said plurality of base stations to an adjacent base station of said plurality of base stations in response to said hand-off request.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×