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RF chain and user selection for multiuser MIMO systems under random data arrival

机译：随机数据到达下多用户MIMO系统的RF链和用户选择

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摘要

Multiuser Multiple input multiple output (MIMO) systems are now having more and more radio frequency (RF) chains, with larger capacity and at the same time higher energy consumption. With random data arrival, it is desired to turn off RF chains to save energy according to the traffic variations. In this paper a low-complexity traffic-aware scheme is proposed, whereby RF chains and users are selected at each frame based on the channel quality and the data queue-length. Particularly, the number of active RF chains is determined by comparing the current queue-length to the predefined thresholds, the values of which are able to control the tradeoff between the energy saving and quality of service, i.e., delay. Simulation results show that the proposed scheme saves more energy compared with conventional schemes which is designed regardless the traffic variations, and the saving gain increases when the average traffic load decreases.
机译：多用户多输入多输出（MIMO）系统现在具有越来越多的射频（RF）链，具有更大的容量，同时能耗更高。对于随机数据到达，期望根据业务量变化关闭RF链以节省能量。本文提出了一种低复杂度的流量感知方案，该方案根据信道质量和数据队列长度在每帧选择RF链和用户。特别地，通过将​​当前队列长度与预定阈值进行比较来确定活动RF链的数量，该预定阈值的值能够控制节能与服务质量（即延迟）之间的折衷。仿真结果表明，与传统方案相比，该方案节省了更多的能源，无论流量如何变化，平均流量减少时，节省的收益就会增加。

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