CONNECTION SETUP STRATEGIES IN OPTICAL TRANSPORT NETWORKS

摘要

An optical transport network comprises a number of nodes, or routers, whichare coupled together via optical fibers. During a connection setup between asourcenode and a destination node, a node of the optical transport network initiatesa cross-connect with an adjacent node and completes the cross-connect with theadjacentnode without waiting for completion of any downstream cross-connects. Thesuccess of the connection operation to the destination node is checked by thenodeon the reverse pass. This results in completely pipelining the various cross-connectoperations at each node. As a result, the connection setup time is of theorder of around-trip delay plus a single cross-connect time (independent of the numberofnodes in the connection path).