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送信装置および受信装置を有し、光束を用いて情報伝送を行う光空間伝送装置において、前記送信装置からの出力される送信光を前記受信装置で受信する際の受信光レベルを検出する手段と、前記受信光レベルの変化速度を検出する手段と、通信遮断時間を測定する手段と、前記受信光レベルの変化速度および前記通信遮断時間から通信遮断原因を判断する手段と、前記通信遮断原因を知らせる手段と、を備えたことを特徴とする光空間伝送装置。Has a transmitter and receiver, the optical space transmission apparatus for performing information transmission by using a light beam, and means for detecting the reception light level in receiving the outputted light transmitted from the transmitting device by the receiving device means for detecting the rate of change of the received light level, and means for measuring the communication interruption time, means for determining a change rate andoutage caused from the communication interruption time of the received light level, the outage caused An optical space transmission device comprising: means for notifying.
JP2001386393A2001-12-192001-12-19
Optical space transmission equipment
Expired - Fee RelatedJP3890226B2
(en)
METHOD AND DEVICE FOR PREDICTING PREFERRED TIME INTERVALS OF TRANSFER OF AN ADDITIONAL CHANNEL USING MEASUREMENTS OF POWER OF TRANSFER OF THE MAIN CHANNEL
Transmitter device, transmission method, receiver device, reception method, transmitter and receiver device, transmission and reception method, recording medium and signal