×

Zone registration of a mobile in a mobile telephone system

  • US 5,406,614 A
  • Filed: 02/01/1993
  • Issued: 04/11/1995
  • Est. Priority Date: 02/21/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. A mobile telephone system comprising:

  • a plurality of base radio stations,each of said plurality of base radio stations having a service zone in which said base radio station connects a mobile radio station in said service zone to a telephone subscriber;

    at least one mobile radio station;

    a common radio channel control unit for controlling all of said plurality of base radio stations;

    cables connecting said radio channel control unit with each of said plurality of base radio stations;

    telephone lines connecting said radio channel control unit to a desired telephone subscriber through private branch exchange equipment;

    a zone register provided in said radio channel control unit for storing identifications of all said mobile radio stations in association with identifications of the service zones to which said mobile radio stations belong;

    means for broadcasting a request signal of zone registration from a first transceiver in said mobile radio station;

    means for receiving said request signal by second transceivers in each of said plurality of base radio stations;

    signal strength detectors provided in each of said plurality of base radio stations for measuring respective field intensities of said request signal, wherein said signal strength detectors comprise an analog to digital converter for converting an analog voltage corresponding to said field intensity to a digital signal;

    means for transmitting to said mobile radio station said measured values of said respective field intensities;

    means for comparing at said mobile radio station the measured values of said respective field intensities and determining a highest measured value of received measured values of said respective field intensities;

    means for transmitting a response signal from said mobile radio station to a selected base radio station, the selected base radio station being that one of said plurality of base radio stations that has transmitted the highest measured value to said mobile radio station;

    means for reporting said response signal from said selected base radio station to said radio channel control unit; and

    means for revising contents of said zone register in said radio channel control unit in accordance with said response signal, wherein a signal indicating completion of said revision of contents of said zone register in said radio channel control unit is transmitted from said radio channel control unit for reception by said mobile radio station.

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