Signaling protocol for rerouting ATM connections in PNNI environments
US6272139A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 2000 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Jan 21, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5631
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
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 different incarnations of segments along the same call path are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.