Methods and apparatus for implementing switched virtual connections (SVCs) in a digital communications switching system
US5051982A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1989 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Jul 27, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13332
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are set forth for quickly making switched virtual connections (SVCs) in a digital circuit switch that integrates voice and data using common switch, control and distribution equipment. SVCs provide concurrent data connection service from one station device, such as a PC, to other station devices over a single line for each station device where the line may also carry voice and terminal data service. A switch control processor remembers connection requests from station devices and acts on opportunities to utilize available bandwidth in an optimal manner. Dynamic connection reconfiguration techniques allow the system to "scavenge" bandwidth unused by voice or terminal data traffic for SVCs thereby providing the largest possible data rate at any given time. Short signalling messages and indexed values are used in order to speed activation time for previously defined connections while resource allocation is performed by the switch control processor to further enhance system operating speed. The system features (a) reduced connection set up time compared with prior art circuit switch communications systems that need to establish a call each time frames are exchange…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.