Traffic engineering technique for routing inter-class traffic in a computer network
US6493317B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/2408
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A technique is provided for routing traffic in an integrated services network which supports a plurality of different service classes including a relative low priority class (e.g. best-effort) and a relative high priority class (e.g. guaranteed sessions). The technique of the present invention improves inter-class resource sharing efficiency and achieves high network throughput of each class of service in the network. The technique discourages guaranteed (high priority) traffic from using links that are already loaded with best-effort (low priority) traffic. This is achieved by using, in the link cost for high priority traffic, a concept of “virtual residual bandwidth”, derived from the link residual bandwidth by taking into account of the congestion condition of low priority traffic. The proposed mechanism is simple in the sense that no changes are needed to the path selection algorithms employed for individual service classes the only change is in the link cost. The distribution of network resources across traffic classes adapts dynamically and automatically to the mix of traffic in the traffic classes, even if the traffic distribution is uneven across the network. Wh…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.