Patent ID: 7076258
Filing Date: 2006-07-11
Classification: H04W,Y02D

Abstract:
1. A mobile communication system constituted by a plurality of base stations, a plurality of mobile stations, a network connected to base stations, and a location information management server, connected to said network, for managing location information of each mobile station and state information thereof; a set of respective cells formed by base stations constituting a first location registration area group, base stations and mobile stations communicating by packet within said cells, whereas said mobile stations transiting to a mode periodically receiving a signal transmitted from base stations if no packet is transmitted and received for a predetermined period even in a communication state; wherein said base stations form second to n-th location registration area groups (where n is a natural number of 2 or greater), each having a range smaller than that of first location registration area such that the area size decreases as n is greater, to be included in first location registration area group used when mobile stations are not in said communication state; and wherein mobile stations select location registration area groups to register mobile stations according to a period in which no packet is transmitted and received in periodically receiving mode, and register a location information to the server while specifying a location registration area within said location registration area group with respect to said location information management server.