Distributed Video Surveillance System Based on Overlay Network

A novel distributed video surveillance system, called as E-touch is presented in this paper. The system provides a three-layers model based on overlay network. In the middle layer of the model, overlay service network layer (OSNL) is composed of many intelligent overlay nodes mapped by underlying network. Overlay nodes provide all kinds of media service for upper surveillance application. OSNL allows service composition of distributed stream processing applications dynamically. And a load balance of QoS-aware service composition algorithm (LBQSC) is employed to satisfy their end-to-end QoS demands. Large-scale experimental results demonstrate the scalability, efficiency and performance of the E-touch system.