物理
计算机科学
IEEE 802.11标准
链路自适应
计算机网络
物理层
传输(电信)
吞吐量
帧(网络)
IEEE 802.11g-2003
网络分配向量
频道(广播)
干扰(通信)
IEEE 802
IEEE 802.15
无线局域网
无线
无线网络
电信
无线传感器网络
衰退
服务质量
作者
Jd.P. Pavon,Sunghyun Choi
标识
DOI:10.1109/icc.2003.1204534
摘要
IEEE 802.11 wireless local area network (WLAN) physical layers (PHYs) support multiple transmission rates. The PHY rate to be used for a particular frame transmission is solely determined by the transmitting station. The transmitting rate should be chosen in an adaptive manner since the wireless channel condition varies over time due to such factors as station mobility, time-varying interference, and location-dependent errors. In this paper, we present a novel link adaptation algorithm, which aims to improve the system throughput by adapting the transmission rate to the current link condition. Our algorithm is simply based on the received signal strength measured from the received frames, and hence it does not require any changes in the current IEEE 802.11 WLAN medium access control (MAC) protocol. Based on the simulation and its comparison with a numerical analysis, it is shown that the proposed algorithm closely approximates the ideal case with the perfect knowledge about the channel and receiver conditions.
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