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

机译：具有基于IEEE 802.11ah（Wi-Fi HaLow）的网络的重传方案的能源感知受限访问窗口控制

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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.
机译：受限访问窗口（RAW）已被引入IEEE 802.11ah MAC层以降低冲突概率。但是，对于不同的设备组不适当地使用RAW会增加上行链路能耗并降低数据速率。在本文中，我们研究了基于IEEE 802.11ah的上行链路通信的节能RAW优化问题。我们首先提出一种新颖的重传方案，该方案利用下一个空时隙为冲突的设备进行重传，并通过应用概率论和马尔可夫链，基于总能耗和每个RAW的数据速率来提出问题。然后，我们得出上行传输的能量效率。最后但并非最不重要的一点是，提出了一种能适应RAW大小的能量感知窗口控制算法，通过识别每个RAW中不同组比例的时隙数来优化能源效率。仿真结果表明，本文提出的算法在上行链路能量效率和传输率方面优于现有的RAW。

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