Patent ID: 6256509
Filing Date: 2001-07-03
Classification: H04L,H04W

Abstract:
A broadcast information delivering system including at least one wireless base station that communicates with wireless terminals control information through at least one control channel and user information through traffic channels assigned to each of said wireless terminals, said wireless base station comprising:a control channel transmitter circuit for transmitting system information and broadcast information to the control channel, said broadcast control information defining a transmission condition of a broadcast frame;a plurality of traffic channel transmitter circuits for transmitting user information to respective traffic channels; anda broadcast channel transmitter circuit for transmitting the broadcast frame, which contains broadcast information to be delivered to unspecified wireless terminals, to a specific channel defined by said broadcast control information in accordance with said transmission condition,wherein said broadcast frame comprises a frame header and a plurality of sub-frames following the frame header, each of said sub-frames containing different broadcast information to each other, and said frame header including guidance information concerning the broadcast information contained in the sub-frames,wherein said guidance information includes classification information for indicating the kind of the broadcast information contained in each of said sub-frames and time information for indicating a transmission time of each of said sub-frames, as said guidance information,wherein each wireless terminal comprises:a control channel receiver circuit for receiving the control information from said control channel,a broadcast channel receiver circuit for receiving the broadcast frame from said broadcast channel based on the broadcast control information received by said control channel receiver circuit, and for selectively receiving broadcast information contained in a specific one of said sub-frames in accordance with guidance information of the broadcast frame,an input device for designating one of the broadcast information, anda power supply controller for halting the power supply to said broadcast channel receiver circuit for a period after receiving the frame header of said broadcast frame until the transmission timing of a sub-frame which includes said designated one of the broadcast information.