Blockage Robustness in Access Point Association for mmWave Wireless LANs with Mobility
Blockage Robustness in Access Point Association for mmWave Wireless LANs with Mobility
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DOI：
10.1109/lcn48667.2020.9314770
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Yuchen Liu;D. Blough
中科院分区：
文献类型：
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作者：
Yuchen Liu;D. Blough
毫米波无线局域网的目标是用于带宽密集型应用，如虚拟/增强现实和实时高清视频。为了在解决毫米波信号阻塞的同时保持高吞吐量，在一个房间内设置多个接入点（ap）以改善视线条件被认为是一种很有前途的方法。在具有固定和移动（人类）障碍物的场景中，我们从数学上分析了由移动性产生的LoS阻塞，并使用该分析开发了一个多ap关联方案。该方案静态地分配主备ap，以最大限度地提高阻塞鲁棒性，并在ap之间实现负载均衡。仿真结果表明：1)我们的静态方法可以提供接近昂贵的动态探测方法的阻塞容忍度，同时实现更高的吞吐量；2)使用客户端移动模式，如果已知，可以进一步改进我们的静态方法；3)我们的方法实现了比现有方法更好的公平性和负载平衡。
Millimeter-wave wireless LANs are targeted for use with bandwidth-intensive applications such as virtual/augmented reality and real-time high-definition video. To maintain high throughput while addressing mmWave signal blockages, multiple access points (APs) within one room to improve line-of-sight conditions is considered a promising approach. In a scenario with fixed and mobile (human) obstacles, we mathematically analyze LoS blockages produced by mobility, and use the analysis to develop a multi-AP association scheme. Our scheme statically assigns primary and backup APs in order to maximize blockage robustness and perform load balancing among APs. Simulation results show that: 1) our static approach can provide blockage tolerance close to that of an expensive dynamic probing approach while achieving higher throughput, 2) the use of client mobility patterns, if known, can improve our static approach even further, and 3) our approach achieves significantly better fairness and load balancing than existing approaches.