| 摘要 |
In a self healing network (SHN) distributed restoration algorithm (DRA) scheme, in the case where two adjacent tandem nodes (5, 6) are contending for the same spare link (S47), an arbitration scheme is used to determine which node has the right to reserve the spare link (S47) for its use. An arbitration timer (34, 40) in each of the adjacent nodes (5, 6) provide a predefined time period for which a node can compare whether it had begun sending out its flooding signature before the far end node had sent out its. Thus, when a node detects a signature received from the spare link before the predetermined time period has elapsed, then the node give up the spare link (S47) for the far end use. If the signature, from the far end node is detected after the predetermined time has elapsed, then the node reserves the spare link (S47) for its own use.
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