H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/86
H04L 5/14 (2006.01) H04L 12/403 (2006.01)
Patent
CA 2010866
A communication system containing a master station, a plurality of slave stations, a transmission line for transmitting a signal between the master station and the plurality of slave stations. The master station contains: a request sending allowance signal sending circuit for sending a request sending allowance signal which addresses one of the plurality of slave stations to give an allowance to send a request for sending data, on transmission line; a request receiving circuit for receiving a request from one of the plurality of slave stations; a request memorizing circuit for memorizing one or more requests from one or more slave stations; and a data sending allowance signal sending circuit for sending a data sending allowance signal which addresses one of the plurality of slave stations to give an allowance to send data, on the transmission line, according to a request which is memorized in the request memorizing circuit. Each of the slave stations comprises: a request sending allowance signal detecting circuit for detecting a request sending allowance signal which addresses its own slave station, on the transmission line; a data sending allowance signal detecting circuit for detecting a data sending allowance signal which addresses its own slave station, on the transmission line; a request sending circuit for sending a request for sending data on the transmission line to the master station when its own slave station detects a request sending allowance signal which addresses its own slave station; and a data sending circuit for sending data on the transmission line to the master station when its own slave station detects a data sending allowance signal which addresses its own slave station.
Amemiya Shigeo
Iguchi Kazuo
Shinomiya Tomohiro
Soejima Tetsuo
Takeo Hiroshi
Fujitsu Limited
Mcfadden Fincham
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