H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/56 (2006.01) H04Q 3/00 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2257595
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 standard 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 such as, preserving QoS metrics during rerouting and separately identifying differentincarnations of segments along the same call path are also provided.
Borden Ladner Gervais Llp
Nortel Networks Limited
Northern Telecom Limited
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