Originating in the detection of breakdown link, traffic dynamically route the routing switch in order to do again to appoint

摘要

(57) Abstract The network which is disclosed includes 2 rings, the 1st ring transmits the data to direction around the right, the ring of one side transmits the data to counterclockwise direction already. Traffic is removed from the ring by the address node. When (namely, all spans is operating state at the time of normal operation,), the data between the nodes until it arrives in the address node, the ring which offers the hop of the smallest frequency flows. Therefore, at the time of normal operation, both rings are utilized sufficiently. In order to detect the breakdown of link of one side, the node tests the bit error ratio of link periodically, (or, error ratio is always computed,). When this kind breakdown is detected, after the breakdown in order to identify the optimum routing of source traffic to the address node, in order to reconstruct the routing chart inside the particular node, the broadcast signal is sent to all nodes. Originating in the link which is in the midst of breaking down, because available link furthermore reaches the point where you look at abundant data traffic, furthermore it can give to the traffic which is appointed as the traffic which is not protected low priority, in order to become the profit of the traffic which is protected, can be being able to make fall or being able to make delay, or. It identifies the link in the midst of breaking down, it communicates to the other node concerning the link in the midst of breaking down, the class which is protected it distinguishes the traffic of the class which is not protected, concerning the technique of specification in order to renew the routing chart it is described.