H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/12 (2006.01) H04B 10/152 (2006.01) H04L 12/413 (2006.01)
Patent
CA 2050746
An optical transceiver is coupled to a U-shaped optical bus and to data terminals employing CSMA/CD. The optical transceiver includes a serial- parallel converter for carrying out a conversion between data to and from the data terminals and transmitting packets to be transmitted from and receiving packets to be received by the data terminals via the serial- parallel converter, an optical bus interface for matching the transmitting and receiving packets to the U-shaped optical bus which is used as a transmission line, a common bus which provides a data transfer path between the serial-parallel converter and the data terminals during transmitting and receiving operations, a transmitting packet intermission part for intermitting the transmitting packets in response to a transmission control signal, a receiving packet intermission part for intermitting the receiving packets in response to a reception control signal, and a controller for generating the transmission control signal and the reception control signal based on timings of the transmitting packet and the receiving packet, a relationship between the transmitting packet and a corresponding receiving packet which is looped back from the U-shaped optical bus, and a collision notification. The serial-parallel converter notifies a collision on the common bus based on an impedance of the common bus by supplying the collision notification to the controller.
Shikata Kiyotaka
Takao Shinji
Fetherstonhaugh & Co.
Fujitsu Limited
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