Power Efficient Discontinuous Reception in THz and mmWave Wireless Systems
Power Efficient Discontinuous Reception in THz and mmWave Wireless Systems
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DOI：
10.1109/spawc.2019.8815451
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
S. Shah;Sundar Aditya;S. Dutta;Christopher Slezak;S. Rangan
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文献类型：
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作者：
S. Shah;Sundar Aditya;S. Dutta;Christopher Slezak;S. Rangan
非连续接收(DRX)是现代蜂窝系统中的关键节电特征，其中用户设备(UE)暂时禁用其接收器。由于高前端功耗，DRX很可能在毫米波和太赫兹频率中特别积极地使用。DRX在这些频率上的一个关键挑战是，个别链路是方向性的，极易受到阻塞。因此，毫米波和太赫兹UE可能需要监控多个方向上的多个小区，以确保连续可靠的连接。该工作提出了一种新颖的启发式算法来动态选择要监控的小区，以尝试在链路可靠性和功耗之间进行最优权衡。本文使用28 GHz和140 GHz的阻塞器的详细和现实的统计模型，对连接模DRX模的消耗进行了初步估计。研究发现，虽然140 GHz下的阻塞动力学较快，但通过足够的宏分集和链路预测，可以在低功率下保持可靠的连通性。
Discontinuous reception (DRX), where a user equipment (UE) temporarily disables its receiver, is a critical power saving feature in modern cellular systems. DRX is likely to be particularly aggressively used in the mmWave and THz frequencies due to the high front end power consumption. A key challenge of DRX in these frequencies is that individual links are directional and highly susceptible to blockage. MmWave and THz UEs will therefore likely need to monitor multiple cells in multiple directions to ensure continuous reliable connectivity. This work proposes a novel, heuristic algorithm to dynamically select the cells to monitor to attempt to optimally trade-off link reliability and power consumption. The paper provides preliminary estimates of connected mode DRX mode consumption using detailed and realistic statistical models of blockers at both 28 and 140 GHz. It is found that although blockage dynamics are faster at 140 GHz, reliable connectivity at low power can be maintained with sufficient macro-diversity and link prediction.