Provision of end-to-end QoS in heterogeneous multi-domain networks

In this paper, we present the framework to provision end-to-end QoS in heterogeneous multi-domain networks that was implemented in EuQoS system and tested in Pan-European research network. It assumes that a pair of end users, possibly attached to different access networks as xDSL, UNITS, LAN/Ethernet, WiFi, MPLS or Satellite, may choose for its connection an appropriate end-to-end Class of Service, depending on the application they use, e.g. VoIP, VoD, FTP, etc. Each end-to-end Class of Service has its own traffic control mechanisms and algorithms and, as a result, it has the ability to handle traffic streams with assumed guarantees for packet transfer characteristics expressed in the form of loss ratio, mean delay and delay variation. The end-to-end Classes of Service are supported in all the domains (including inter-domain links) independently using specialised inter-domain Class of Service-aware QoS routing protocol which establishes the end-to-end QoS paths. This paper describes the solution and includes exemplary simulation and experimental results.