A State-Aware Rate Optimization Scheme based on Congestion Discrimination over Wireless Networks

In this paper, a novel rate optimization scheme based on discrimination is proposed for multimedia transmission over heterogeneous IP networks. Via analysis wireless channel characteristics, the scheme can detect the nature of packet losses by sending large and small packets alternately, then adopt adaptive rate control strategies to increase the network throughput and decrease congestion packet loss rate. By means of updating factor and loss queue, this scheme can adapt to the changes of network states quickly and improve delivery quality of real-time multimedia stream. Compared with previous algorithms, simulation results show that the proposed scheme can improve the networks throughput of multimedia transmissions and reduce the congestion loss rate, in different network topology environments.