Patent ID: 6549775
Filing Date: 2003-04-15
Classification: H04W

Abstract:
A mobile communication system, comprising:a base station having: storage means installed in the base station, for registering mobile stations in connection with paging areas, the size of which is restricted by dividing the areas covered by at least one base station into a plurality of reduced paging areas, within at least one of which a call to all mobile stations therein is made; means for receiving a location registration request from a mobile station and for registering the mobile station in the storage means in the base station in connection with a corresponding one of the reduced paging areas; and means for determining, according to the location registration request, whether or not a location area or a paging area registered for the mobile station must be updated, if the paging area must be updated, for processing a location registration request within a base station, and if the location area must be updated, for transmitting a location registration request to a location management center through an exchange station; and the mobile station includes: means for comparing (a) a location area identifier and a reduced paging area identifier stored in said mobile station with (b) location area identifier and a reduced paging area identifier transmitted from one of the base stations, and if a difference is detected in at least one of said identifiers, for transmitting to the base station said location registration request containing a mobile station identifier of its own.