Dynamic permanent virtual connection (DPVC) at user-to-network interfaces in frame relay networks
US6125119A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2854
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A frame relay network relies on virtual connections to support the exchange of data through an intervening network from an originating end system to a remote destination end system. While permanent virtual connections or PVCs (connections which remain established even when data is not being sent) might be used to form the virtual connection, switched virtual connections (SVCs) are preferred within the network since such connections are cleared when not needed. Clearing a connection makes the resources previously allocated to the connection available for use by other end users. However, end user systems typically expect to see PVC service through the network, leading to difficulties in establishing SVCs end-to-end. To support continued use of PVC applications preserving availability of network resources, a Dynamic Permanent Virtual Connection or DPVC is defined. The DPVC provides an end user a capability to notify the frame relay network whether the resources of the SPVC may be released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.