基于指数退避算法的IEEE 802.11协议吞吐量分析

Analysis of Throughput of IEEE 802.11 Protocol Based on Exponential Backoff Algorithm

在实际网络通信环境下,数据分组因为信道干扰而导致信息不能有效传输,因此在非理想信道下改善系统的性能影响是有必要的。本文以无线局域网为通信背景,考虑到非理想信道对WLANs产生的诸如信号衰落和失真等影响的条件下,在以往文献指数退避算法的基础上加入冻结概率来减少信道中的数据冲突,并结合两种接入访问方式分别求得IEEE 802.11协议下的饱和吞吐量公式,最后模拟仿真对该模型进行分析和验证。

In the actual network communication environment, data packets cannot be efficiently transmitted due to channel interference, so it is necessary to improve the system performance impact under non-ideal channels. This paper takes the wireless LAN as the communication background, consi-dering the impact of non-ideal channels on WLANs such as signal fading and distortion, adds the freezing probability based on the previous literature exponential backoff algorithm to reduce the data collision in the channel and combine them. The two types of access methods are used to obtain the saturation throughput formula under the IEEE 802.11 protocol. Finally, simulation and analysis of the model are performed.