| 摘要 |
PROBLEM TO BE SOLVED: To perform uninterruptible transmission which is equivalent to a line switching technology without affecting the transmission efficiency of a packet. SOLUTION: When a node A transmits a unicast data packet to nodes B, C, D, E, F and G, the node A selects a ring with the shortest path. The transmission source node A selects a ring that does not pass through a failure place when the failure occurs in the selected ring with the shortest path. In this case, the transmission source node A stores a unicast data packet for all nodes at a normal time ahead of the failure occurrence and transmits the stored unicast data packet to the ring that does not pass through the failure place when a destination node is not on the ring with the shortest path when the transmission source node A selects the ring that does not pass through the failure place. Thus, the unicast data packet for the destination node F can be transmitted through the nodes B, C, D and E with no short break. COPYRIGHT: (C)2005,JPO&NCIPI
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