Semi-permanent virtual paths for carrying virtual channels
US6353594B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1998 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Mar 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/563
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A semi-permanent virtual path circuit (SPVPC) is used in a dedicated-connection switching digital network for routing and maintaining data flow between network edge nodes. A two level connection admission control and signaling regime is employed wherein the semi-permanent virtual path circuit is automatically provisioned by a network management system to level two signaling and connection admission control and the physical link between pairs of core nodes is provisioned with level one resources. Under this scheme the physical link between core nodes is limited to virtual path circuits and the SPVPC carries switched virtual channel circuits (SVCCs) and semi-permanent virtual channel circuits (SPVCCs). The level two resources are configured to react slower to network changes, such as network failure, than the level one resources. In the event of network failure the faster acting level one signaling resources attempt to re-route VPC connections between core nodes before the slower level two resources becomes aware of the failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.