A QoS-Aware Overlay Multicast Routing Protocol
Wu Jia · Chinese Journal of Computers · 2006
The QoS routing problem in overlay multicast is studied,by extending the degree-constrained model,a new overlay multicast network model supporting QoS routing is presented.Based on this model,a new QoS overlay multicast routing protocol called QoS-aware Overlay Multicast Tree Protocol(QOMTP) is proposed.Adopting distributed and tree-first strategies,the protocol enables members of a multicast group to self-organize into a sourced-based(overlay) multicast tree satisfying QoS constraints.QOMTP used a new heuristic local optimum algorithm,which can make trade-off between delay and bandwidth of routing flexibly by adjusting a heuristic parameter.The simulation results show that QOMTP could reduce the network resource usage of members on the tree as well as achieve a higher admission rate of members and better dynamic(adaptability) efficiently,while distributing multimedia according to the required bandwidth and choosing a proper value of the heuristic parameter.