TRANSMISSION STOP PERIOD CONTROL CIRCUIT IN DIGITAL WIRELESS COMMUNICATION SYSTEM

Japanese Patent JP3432475

B2

PROBLEM TO BE SOLVED: To provide a transmission period control circuit in a digital wireless communi cation system in which, by controlling a transmission stop period in a broadcast station adopting the CSMA/CA communication system so as to suppress the effect of receiving interference, deterioration in the throughput is avoided and by suppressing the effect of giving interference, the characteristic deterioration in an interference station is suppressed.
SOLUTION: The transmission stop period control circuit is provided with a 2nd threshold value circuit (interference signal threshold value circuit 107) that sets a 2nd threshold value for detecting an interference wave different from a 1st threshold value used to detect a reception level and receiving an output of a reception signal level detection circuit 103 to provide an output of a signal in excess of the 2nd threshold value, an output of the 2nd threshold value circuit is fed to a 2nd control circuit (transmission stop period control circuit 108), when the signal is received, it is discriminated that the interference wave is inexistence to stop the transmission of the signal for a prescribed period and a transmission enable state is again set after the lapse of the prescribed period to control a signal transmission circuit 106 that transmits the signal by the CSMA/CA communication system.

Takeshi Onizawa
Masato Mizoguchi
Hajime Nakamura
Tetsuya Shiramizu
Mitsuhiro Baba
Noriyuki Nagamatsu

JP2000046512A

August 04, 2003

February 23, 2000

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Nippon Telegraph and Telephone Corporation

H04B1/04; H04L12/28; H04L29/08; (IPC1-7): H04L12/28

JP5130053A
JP637762A

Masatake Shiga

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