基于实时传输协议的QOS研究

随着互联网技术的发展与普及，多媒体等实时业务的应用变得越来越广泛，同时实时业务对网络传输的服务质量（QoS）要求也越来越高。在分析了影响网络实时传输QoS因素的基础上，利用丢包率作为判断当前网络拥塞与否的参考量，设计了一种自适应的流量控制机制，该机制使用变常数增长和乘减少的方式对发送速率进行自适应调整。仿真结果表明，该机制有效地提高了实时传输的QoS。

Research on QoS Based on Real-time Transport Protocol

The applications of Real-time business especially real-time multimedia stream business become more and more extensive currently and require a higher quality of service （QoS）, with the development and popularization of Internet technology. This paper designs an adaptive flow control mechanism based on the analysis about factors of affecting the real-time transmission QoS, and using the packet loss rate to determine the current network congestion or not as a reference volume. And the mechanism uses the method of variable constant growth and Multiplication reduction to adjust the sending rate results adaptively. The simulation results show that the mechanism can improve the QoS of real-time transmission effectively.