QoS Service Routing for Supporting Multimedia Applications

Based on the distributed and composable service model, the QoS service routing problem for supporting multi-media applications has emerged. Different from the conventional QoS data routing, QoS service routing presents additional challenges caused by the service availability, service dependency, and resource requirement heterogene-ity issues, which make solutions for QoS data routing inapplicable to QoS service routing. Existing solutions for addressing this problem are either not generic enough or not integrated (service configuration selection is done separately from service path finding), so that they either become inapplicable to new environments/metrics or the computed paths are sub-optimal. This paper presents a generic and integrated approach for computing optimal ser-vice paths, and shows an aggregate performance function- - that optimizes several routing metrics at the same time. We adopt a global-view approach, so that service paths can be computed quickly in a single node, without flooding the network. The simulation performances show that is superior, and integrating service configuration selection with service path finding is desirable