密集型IEEE 802.11ac网络中一种基于部分频率复用与功率控制的干扰管理机制
首发时间:2014-11-26
摘要:随着2.4GHz频段变得拥挤,新一代的WLAN标准IEEE 802.11ac已经转移到5GHz频段。802.11ac最显著的特征是扩宽了无线信道的带宽,这将导致更严重的重叠BSS干扰。结合信道特点,本文将FFR机制用于密集型部署802.11ac网络中进行重叠干扰管理,与不采取干扰管理及采用复用度为三的频率复用机制相比,FFR在吞吐量与频率使用效率方面性能表现优异。为了进一步提高性能,本文还提出了一种动态的FFR算法,可以根据用户密度自适应调整小区中心区域覆盖范围并相应调整信道与功率资源的分配。仿真结果显示动态机制在网络吞吐量、干扰消除以及能耗方面都有显著的性能提升。
关键词: 密集型无线局域网 IEEE 802.11ac 干扰管理 动态部分频率复用 功率控制
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A Dynamic Fractional Frequency Reuse (FFR) Scheme with Power Control for Interference Management in High-density IEEE 802.11ac WLANs
Abstract:As 2.4GHz frequency band has become so crowded that the new generation WLAN protocol IEEE 802.11ac is shifting to the wider 5GHz band. The most notable feature of 802.11ac is the extended bandwidth of the wireless channels, which will lead to more prevalent overlapping BSS problem. Taking the channel feature into account, we employ FFR scheme to manage overlapping interference in high density 802.11ac network. FFR tends to reach an excellent trade-off between throughput and frequency efficiency in simulation, comparing with the reuse-1 and reuse-3 scheme. For further improving performance, we propose a dynamic FFR algorithm. By adjusting the scale of cell-center, the channel and power resources can be adaptively allocated according to the user density. The simulation results show that the dynamic scheme improves the network performance in aspects of throughput, interference mitigation and power-saving.
Keywords: high-density wireless local area network (WLAN) IEEE 802.11ac interference management dynamic fractional frequency reuse (FFR) power control
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No.4618969101655214****
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