In this paper, we propose an autonomously distributed QoS control method for MPEG video streaming in a wide area network. The capacity of the links and the characteristics of video streams change dynamically. However, managing the condition of all the links and streams in the network is difficult. In the proposed method, the routers in the network monitor the conditions of the links and streams locally and control the transmission rate of the stream server. Picture-quality oriented fairness is achieved by reducing the transmission rate of the streams with the higher PSNR in the bottleneck link. The computer simulation results show that the proposed method can be applied to a wide area network.

We have developed an open-architecture router (OAR) prototype using industrial standard hardware, software components, and interfaces. The prototype is built with Advanced Telecom Computing Architecture (ATCA)-compliant hardware. Carrier-grade Linux (CGL) is used as the operating system. A new OAR configuration method is described where industrial standard hardware and software interfaces are used. Basic forwarding functions with routing protocol processing are demonstrated for the first time.