Patent ID: 7317713

Claim:
A bidirectional digital wireless system using asymmetric transmission frames comprising: a mobile station for generating and transmitting a plurality of uplink transmission frames each including a guard frame portion and a data frame portion carrying a main information segment in a time division duplexing manner; said guard frame portion and said data frame portion being separated from each other with respect to time length; and a base station for receiving said uplink transmission frames, and generating and transmitting a plurality of downlink transmission frames each including an information frame element carrying a subsidiary information segment to said mobile station with reference to said uplink transmission frames in said time division duplexing manner, wherein said base station is operative to divide said information frame element into a predetermined number of information frame portions respectively corresponding to said guard frame portions of said uplink transmission frames with respect to time length, and generate and transmit a plurality of downlink transmission frames each including said information frame portions collectively forming said information frame element carrying a subsidiary information segment to said mobile station, said information frame element carrying said subsidiary information segment includes an index frame element indicative of a category of said subsidiary information segment and a state frame element indicative of a state of said subsidiary information segment, said index frame element and said state frame element respectively have frame lengths, said mobile station and said base station respectively comprise storage units each for storing a reference table showing said frame lengths of said state frame elements in association with said frame lengths of said index frame elements, said base station is operative to generate and transmit a plurality of downlink transmission frames each including an information frame element including an index frame element and a state frame element with reference to said reference table stored in said storage unit, and said mobile station is operative to receive said downlink transmission frames in said time division duplexing manner so as to sequentially extract said information frame portions collectively forming said information frame element, detect said index frame element, identify said frame lengths of, and detect said index frame element and said state frame element with reference to said reference table stored in said storage unit, and process said subsidiary information segment in accordance with said index frame element and said state frame element thus identified and detected.