Patent ID: 6400959
Filing Date: 2002-06-04
Classification: H04B,H04W

Abstract:
A communication system having a first area where communication with a mobile terminal can be performed and a second area where communication can be performed with the mobile terminal when on a periphery of the first area, said system comprising:a plurality of base stations provided on the periphery of the first area, each of said base stations being configured to communicate via wireless communication in the first area, down message data being transmitted on a first frequency in a first narrow band of a channel frequency from an originating base station of said plurality of base stations, each of the other plurality of base stations configured to receive the down message data and then transmit the down message data on the first frequency; and a mobile terminal configured to receive the down message data transmitted from the originating base station and other base stations and configured to transmit up message data to the plurality of base stations by using a second frequency in a second narrow band of the channel frequency different from the first frequency used for transmission of the down message data.