Fujitsu Corporation

Sachio Miyazaki

Ichiro Ayukawa

Shinichiro Aoki

A transmitting power control system includes a first-mode arithmetic operation unit for arithmetically obtaining an actual up-link rain attentuation amount based on a total rain degradation amount and a down-link rain attenuation amount and arithmetically obtaining a ratio of the actual up-link rain attenuation amount to the down-link rain attenuation amount. A measurement executable judgement unit determines whether or not the measurement is possible based on the originating station returning wave. A second-mode arithmetic operation unit is connected to the first mode arithmetic operation unit for presuming and arithmetically obtaining an up-link rain attenuation amount based on the actual rain attenuation amount ratio and the down-link rain attenuation amount by latching the rain attenuation amount ratio when the measurement executable judgement unit determines that the measurement is impossible.

Transmitting power control system

A synchronization method and apparatus in redundant time-division-multiple-access communication equipment, wherein the synchronization between an active circuit and a standby circuit is carried out using a frequency divided signal from the active transmission frame timing signal instead of using the transmission frame timing signal. At timings other than the output timing of the frequency divided signal, the standby transmission frame counter runs independently. Thus, failure of the active circuit has less effect on the standby circuit and switching between the active circuit and the standby circuit can be carried out smoothly.

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Tokyo, Japan

Sachio Miyazaki