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Location registration system enabling a radio telephone set to automatically start location registration after travel for use in a mobile radio telephone network

  • US 5,400,392 A
  • Filed: 03/13/1991
  • Issued: 03/21/1995
  • Est. Priority Date: 03/14/1990
  • Status: Expired due to Fees
First Claim
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1. A location registration system for carrying out a registration of location information of movable radio telephone sets into a subscriber'"'"'s file of a line connection unit through radio connection device connected to the line connection unit in a mobile telephone network system, wherein each of said radio connection devices comprises means for transmitting an individual location announcement signal having an individual zone number, and each of said radio telephone sets comprises:

  • a first memory file for memorizing a first status signal and first location information having a first zone number;

    a second memory file for memorizing a second status signal and second location information having a second zone number;

    receiving means for receiving said individual location announcement signal as a particular location announcement signal having said individual zone number as a particular zone number;

    receiving means coupled with said first memory file and said receiving means for comparing said first zone number with said particular zone number, said comparing means producing a coincident signal when said first zone number is coincident with said particular zone number, said comparing means producing an error signal when said first zone number is different from said particular zone number;

    first writing means coupled with said comparing means and said first memory file responsive to said coincident signal for writing particular status information in said first memory file as said first status signal;

    second writing means coupled with said comparing means and said second memory file responsive to said error signal for writing said particular zone number and said particular status information in said second memory file as said second zone number and said second status information, respectively;

    first reading means coupled with said first memory file for reading said first status signal to produce an access signal when said first status signal is not indicative of said particular status information;

    second reading means coupled with said first reading means and said second memory file responsive to said access signal for reading said second status signal to produce a first start signal when said second status signal is indicative of said particular status information; and

    means coupled with said second reading means responsive to said first start signal for starting a first operation for said registration of location information.

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