QoS state information aggregation for Inter-domain routing

Quality of Service (QoS) parameter aggregation is essential to Inter-domain QoS routing. It is the goal that how to aggregate Intra-domain QoS state with less data and less information losses. This Paper proposed a geometry-based approach to represent the QoS state information of delay and bandwidth for a subnetwork. We use regular polyline to approximate the service support area and just six tuples are needed to represent the aggregated information in our scheme. Both of the processes of aggregation and restore are introduced. Simulations and comparisons show that our scheme has the lower aggregation error ratio than existing approaches.