Quality of Service in Edge Routers

The goal of this work is to solve the QoS provisioning issue in the context of a private network established over the Internet. Companies are eager to move from a costly private leased-line service to a private network over the public Internet. At the time being, the only kind of service offered by vendors is based on IPSec. It guarantees a certain level of confidentiality but no QoS can be guaranteed. It is highly expected that in the near future, ISP and IAP will introduce new solutions such as MPLS or DiffServ to ensure QoS that will accelerate the migration trend from leased-line VPN to Internet VPN. Our first objective is to identify the required services over which a QoS VPN can be developed. A specific problem of companies is to efficiently use the access bandwidth they pay for. This access link is always a bottleneck and companies want to give priority to their vital applications. While prioritization is a first solution towards a better utilization of the access link, we also believe that response times could be improved by taking into account the characteristics of the IP traffic. We are looking into the design of some new service policies at the edge router in order to reduce the latency experienced by short lived flows.

Research Team

Ernst Biersack

Guillaume Urvoy-Keller

Idris Rai