| 摘要 |
A method in a connection based communication network for rerouting a call connection path coupling a calling and a called party. Rerouting is done within a peer group and may be performed in any peer group level along the connection path. The method allows individual segments within peer groups to be rerouted for a number of different reasons such as fault recovery, route optimization, bandwidth adjustment, and load balancing. The reroutable call paths are implemented by inserting rerouting information elements in the standar d setup and connect messages used to create call paths in PNNI environments. These information elements permit both nonpreemptive rerouting, establishing a new call path before the old one is terminated and preemptive rerouting, establishing a new path after the old one is terminated. Additional features suc h as, preserving QoS metrics during rerouting and separately identifying different incarnations of segments along the same call path are also provided.
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