对无线局域网技术用作广域实时语音和数据混传的改善

Improvement for Wide Area Transmission of Real-time Voice and Data over WLAN Interface

无线局域网的移动性,高带宽和低成本使得它获得了长足的发展。但是若使用无线局域网来广域混合传输语音和数据一定的劣势,抖动的时延,高误码率都让语音和数据混传受到很大的困扰。在本篇论文之前,使用QoS业务区分和基本流量控制已经可以实现长距离混合传输语音和数据,本篇论文将对QoS提出新的改进,使用状态机结合流量控制的算法,使得语音和数据混传得到更好的性能。

Wireless LAN has flourished a lot recently because of its high bandwidth, mobility and low cost. But there are still some disadvantages as uncertain delays, high Bit Error Rate when we put data and voice on the Wireless LAN together. It will be even worse when we use the Wireless LAN to carry bits over wide areas. Before this paper, KZTECH（ www. kztech, cn） have accomplished mixed streams of .voice and, data over wide area Wireless LAN by using Quality of Services and basic flow control. In this paper, we bring up a new algorithm of switching status and more accurately flow control to improve the performance of mixed streams of voice and data over Wireless LAN.