H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/1
H04B 10/207 (2006.01) H04L 12/44 (2006.01) H04L 12/46 (2006.01)
Patent
CA 1225121
ABSTRACT OF THE DISCLOSURE In an optical network system comprising a plurality of communication stations and a star coupler common to the stations, a collision test signal is produced from a generator included in a transmitter section of each station to be sent to the star coupler prior to transmission of a data sequence and is directly returned from the star coupler to a receiver section thereof. The receiver section comprises a detector for monitoring the collision test signal to detect occurrence of collision. The detector makes the transmitter section inter- cept the data sequence on occurrence of the collision. Prefer- ably, the collision test signal is encoded by an encoder in the transmitter section to be combined with a snychronizing signal and is decoded by a decoder in the receiver section. Such stations may be coupled to the star coupler through a concentrator and a distributor or may be divided into a plurality of groups each of which is accommodated in a network unit linked through a repeater to the other in a loop.
440448
Abe Akio
Aono Kouji
Miyano Souichirou
Mochizuki Motomu
Sho Shigeru
Nec Tokin Corporation
Smart & Biggar
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