Patent ID: 8094642

Claim:
A digital radio communication system for collecting information as a polling response signal by polling comprising: a base station for transmitting a polling signal; and a plurality of mobile stations for transmitting said poling response signal including information about a current state of each mobile station to said base station, wherein each of said mobile stations transmits only one frame of a communication channel as said polling response signal when each of said mobile stations has received said polling signal, and said communication channel constructs said one frame in which a cyclic bit pattern is placed at a leading end of a frame format and successively a synchronous word is placed, and wherein said base station controls an Automatic Gain Control (AGC) by said cyclic bit pattern and performs the processing for establishing synchronicity with the base station according to said synchronous word when said base station has received said polling response signal, and then said base station receives said poling response signal by only one frame of said communication channel.