Improved IEEE 802.11 point coordination function considering fiber-delay difference in distributed antenna systems
Yuting Fan, Jianqiang Li, Kun Xu, Nathan J. Gomes, Xun Lu, Yitang Dai, Feifei Yin · 2014
In this paper, we present an improved IEEE 802.11 wireless local-area network (WLAN) medium access control (MAC) mechanism for simulcast radio-over-fiber-based distributed antenna systems where multiple remote antenna units (RAUs) are connected to one access point (AP). In the improved mechanism, the fiber delay between RAUs and central unit is taken into account in a modification to the conventional point coordination function (PCF) that achieves coordination by a centralized algorithm. Simulation results show that the improved PCF outperforms the distributed coordination function (DCF) in both the basic-access and request/clear-to-send modes in terms of the total throughput and the fairness among RAUs.