| 摘要 |
PCT No. PCT/SE96/00120 Sec. 371 Date Sep. 16, 1997 Sec. 102(e) Date Sep. 16, 1997 PCT Filed Feb. 2, 1996 PCT Pub. No. WO96/24998 PCT Pub. Date Aug. 15, 1996Channels are assigned in an optical bus network, including N nodes connected in series to one another by way of a pair of optical fibers, which facilitate simultaneous, two-way communication between all nodes of the bus network. A second pair of optical fibers, which directly connect the first and second nodes of the bus network, is adapted, after protective switching, to maintain the communication in the event of an interruption in the first pair of fibers. Each transmitter on the bus network transmits a certain network channel. Each receiver on the bus network receives a certain wavelength channel and allows other wavelength channels to pass to the next node. The channel which is received by a receiver in a node is entirely removed from the network, whereafter the channel can be re-used for transmission of information between two other nodes. In this way a minimum number of channels can be used for the communication between the nodes, and a minimum number of channels can be assigned to a node in an optical bus network in such a way that the channel assignment can be maintained in the event of an interruption at any point on the bus network. |
