摘要
限制接入窗口(RAW)机制是IEEE 802.11ah标准中的媒体接入控制(MAC)的增强.基于原始RAW机制、阈值和最佳RAW组大小决策,提出了1种优化的RAW方案来提高重负载网络的性能,并进一步突出了RAW的优势.与传统的DCF方法相比,所提出的方案在具有大量终端的饱和场景中提高了网络性能.仿真结果表明所提出的方案在吞吐量、功耗和公平性方面具有优势.因此,该方案可以在实际的802.11ah中采用以提高网络性能.
Restricted Access Window(RAW) mechanism is a significant Medium Access Control(MAC) enhancement in IEEE 802.11 ah standard. An optimized RAW scheme is proposed to improve the performance of heavy-loaded networks. Based on the original RAW mechanism, threshold and optimal RAW group size decision was introduced into the proposed scheme, which further highlighted the advantage of RAW. Compared to traditional DCF method, the proposed scheme improves the network performance in saturated scenario with large number of stations. Simulation results confirmed the advantages of proposed scheme in throughput, power consumption and fairness. This scheme can therefore be adopted in practical802.11 ah use cases to improve the network performance.
引文
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