US 5,400,392 AGranted

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

AssigneesNEC Corporation, Nippon Telegraph and Telephone Corporation

InventorsNoriaki Nagashima, Kohji Momma

Life of this patent

Estimating the term…

Loading patent…

Abstract

For starting a registration operation of location information of movable radio telephone sets into a subscriber's file in a line connection unit connected to radio connection devices in a mobile telephone network system after travel of each of the radio telephone sets, each radio telephone set is provided with a unit for measuring a travel amount. The radio telephone set produces a request signal for the location information registration when the travel amount measured exceeds a first threshold value. Alternatively, the radio telephone set reset the measuring unit when the travel amount measured exceeds a first threshold value and thereafter produces a request signal for the location information registration when the travel amount measured does not exceed a second threshold value smaller that the first threshold value. Radio connection devices announce location information signals and each radio telephone set holds, as a held location information, the location information registered in the subscriber's file. When the telephone set receives one of the location information signals which has location information different from the held location information, the radio telephone set produces another request for registration of the different location information.

Claims4

Dependent claims

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.

7 more elements

A location registration system for carrying out registration of information representing the location of movable radio telephone sets into a subscriber's file of a line connection unit through a radio connection device connected to the line connection unit in a mobile telephone network system which comprises:

travel amount measuring means associated with each of said radio telephone sets for measuring a travel amount of each radio telephone set;
each of said radio telephone sets comprising:
monitoring means coupled with said travel amount measuring means for monitoring the travel amount in said travel amount measuring means as a monitored travel amount;
travel completion deciding means coupled with said monitoring means for deciding completion of the travel of each radio telephone set;
registration starting means coupled with said travel completion deciding means for starting said registration of location information;
first holding means for holding a first threshold value;
second holding means for holding a second threshold value smaller than said first threshold value;
timer means having a predetermined operable time period after start;
resetting and starting means coupled with said monitoring means, said travel amount measuring means and said timer means for resetting said travel amount measuring means and starting said timer means when said monitored travel amount exceeds said first threshold value;
said monitoring means monitoring said travel amount measuring means to produce a monitored value as said monitored travel amount when said timer means stops its operation;
and
said deciding means further coupled with said second holding means and deciding said completion of the travel when said monitored value is smaller than said second threshold value.

9 more elements

Dependencies are inferred from the claim text.