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针对单信道全双工WLAN系统,在传统半双工点协调功能(PCF)的基础上,提出一种单信道全双工PCF协议,该协议具有自适应单/双向传输、高效询、低功耗等优点;采用M/G/1休假队列模型分析了该协议的时延和吞吐量等性能.性能分析和仿真结果表明:全双工PCF的性能较传统半双工PCF有较大提升;在信噪比和包到达率相等的情况下,时延特性较半双工PCF提升60%以上,吞吐量性能较半双工PCF提升近60%.因此,所提单信道全双工PCF协议更适合用于高速率、大数据量,且对时延敏感的环境.
Based on the traditional half-duplex point coordination function (PCF), a single-channel full duplex PCF protocol is proposed for single-channel full-duplex WLAN system. The protocol has adaptive single / bidirectional transmission, efficient polling, low power The performance of delay and throughput of the protocol is analyzed by M / G / 1 leave queue model.The performance analysis and simulation results show that the performance of full-duplex PCF is greatly improved compared with the traditional half-duplex PCF, Compared with the half-duplex PCF, the delay performance is improved by more than 60% and the throughput performance is improved by nearly 60% compared with the half-duplex PCF when SNR and packet arrival rate are equal. Therefore, Suitable for high-speed, large amount of data, and the delay-sensitive environment.