基于 IEEE 802.11ah（Wi-Fi HaLow）网络的能量感知限制访问窗口控制与重传方案

2017 13th Annual Conference on Wireless On-demand Network Systems and Services (WONS) Pub Date : 2017-03-30 DOI:10.1109/WONS.2017.7888774

Yanru Wang, K. K. Chai, Yue Chen, J. Schormans, J. Loo

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引用次数: 30

摘要

限制访问窗口（RAW）已被引入 IEEE 802.11ah MAC 层，以降低碰撞概率。然而，对不同设备组不适当地应用 RAW 会增加上行链路能耗并降低数据传输速率。本文研究了基于 IEEE 802.11ah 的上行链路通信的节能 RAW 优化问题。我们首先提出了一种新颖的重传方案，即利用下一个空时隙为碰撞设备进行重传，并通过应用概率论和马尔可夫链，根据总体能耗和每个 RAW 的数据速率来制定问题。然后，我们得出了上行链路传输的能效。最后，我们提出了一种适应 RAW 大小的能量感知窗口控制算法，通过确定不同群组规模下每个 RAW 的时隙数来优化能效。仿真结果表明，我们提出的算法在上行链路能效和传送率方面优于现有的 RAW。

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Energy-aware Restricted Access Window control with retransmission scheme for IEEE 802.11ah (Wi-Fi HaLow) based networks

Restricted Access Window (RAW) has been introduced to IEEE 802.11ah MAC layer to decrease collision probability. However, the inappropriate application of RAW for different groups of devices would increase uplink energy consumption and decrease data rate. In this paper, we study an energy efficient RAW optimization problem for IEEE 802.11ah based uplink communications. We first present a novel retransmission scheme that utilizes the next empty slot to retransmit for collided devices, and formulate the problem based on overall energy consumption and the data rate of each RAW by applying probability theory and Markov Chain. Then, we derive the energy efficiency of the uplink transmission. Last but not the least, an energy-aware window control algorithm to adapt the RAW size is proposed to optimize the energy efficiency by identifying the number of slots in each RAW for different group scales. Simulation results show that our proposed algorithm outperforms existing RAW on uplink energy efficiency and delivery ratio.

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2017 13th Annual Conference on Wireless On-demand Network Systems and Services (WONS)

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