Patent ID: 7286504

Claim:
A communication system comprising: a plurality of base stations for communicating with a mobile station, the base stations defining respective cells which provide a communication zone; and a zone control station connected to the base stations for managing communications with the mobile station in the zone, wherein a first base station among the plurality of base stations includes a bidirectional communication station capable of communication in both directions, and a base station between the first base station and the last base station among the plurality of base stations includes a unidirectional communication station capable of communication with the mobile station in only one direction, wherein the zone control station is constructed to receive identification information which identifies the mobile station from the mobile station through the first base station and communicate with the mobile station in the zone by using an in-zone identification information set in correspondence with the identification information received from the mobile station, and wherein the zone control station is constructed to divide data for transmission to the mobile station, to transmit the divided data from the unidirectional communication station to the mobile station while assigning numbers to the divided data, to receive from the mobile station through the last base station the number of the divided data received by the mobile station, and checks the divided data which has not been received by the mobile station.