mmChoir: Exploiting Joint Transmissions for Reliable 60GHz mmWave WLANs
mmChoir: Exploiting Joint Transmissions for Reliable 60GHz mmWave WLANs
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DOI：
10.1145/3209582.3209608
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发表时间：
2018-06
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影响因子：
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通讯作者：
Ding Zhang;Mihir Garude;Parth H. Pathak
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作者：
Ding Zhang;Mihir Garude;Parth H. Pathak
60 GHz 毫米波 WLAN 因其提供每秒数千兆位数据速率的能力而受到关注。尽管具有潜力，但由于人体阻塞而导致的链路中断仍然是一个具有挑战性的突出问题。在这项工作中，我们提出了 mmChoir，这是一种新颖的主动阻塞缓解技术，它利用多个接入点 (AP) 的联合传输为客户端提供阻塞恢复能力。我们根据到客户端的传入路径的角度扩展及其阻塞概率得出新的可靠性指标。该度量可用于智能地选择可提供更高可靠性的联合传输。 mmChoir 的调度程序使用可靠性度量以及新颖的干扰估计模型来明智地调度联合传输，并提高网络容量和可靠性。我们的测试台和跟踪驱动的模拟表明，mmChoir 的性能优于现有的基于波束切换的阻塞缓解方案，网络吞吐量平均提高 58%。
60 GHz millimeter-wave WLANs are gaining traction with their ability to provide multi-gigabit per second data rates. In spite of their potential, link outages due to human body blockage remain a challenging outstanding problem. In this work, we propose mmChoir, a novel proactive blockage mitigation technique that utilizes joint transmissions from multiple Access Points (APs) to provide blockage resilience to clients. We derive a new reliability metric based on angular spread of incoming paths to a client and their blockage probabilities. The metric can be used to intelligently select joint transmissions that can provide higher reliability. The reliability metric along with a novel interference estimation model, is used by mmChoir's scheduler to judiciously schedule joint transmissions, and increase network capacity and reliability. Our testbed and trace-driven simulations show that mmChoir can outperform existing beamswitching based blockage mitigation scheme with on an average 58% higher network throughput.