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无线设备电池能量有限,影响着整个无线网络的性能,同时也极大地影响着用户的网络体验.因此,降低无线终端能耗已成为提高用户网络体验的必然要求,也是构建绿色网络的一个重要课题.考虑到无线发送终端在无线信道状态好的时刻发送数据能提高能量的利用率,提出一种基于最优停止理论的数据传输能耗优化策略以最小化无线设备的能量消耗及延长电池的使用寿命.在该策略中,无线发送终端在给定的传输延时范围下周期性的侦测信道以选择信道状态最好的时刻来传输数据,但由于增加了信道的侦测次数导致数据延迟发送,所以本文引入一个折扣函数,从而将该问题转化成带折扣的秘书问题,最后求出最优停止规则.实验结果表明,本文提出的策略具有较小的单位数据平均能耗,对于提高无线网络的能效具有重要意义.
Wireless devices have limited battery energy and affect the performance of the entire wireless network, but also greatly affect the user’s network experience.Therefore, reducing the energy consumption of wireless terminals has become a necessary requirement to enhance the user’s network experience and an important issue in building a green network Considering that the wireless transmitting terminal can increase the energy utilization rate by sending data at the time of good wireless channel status, a data transmission power optimization strategy based on the optimal stopping theory is proposed to minimize the energy consumption of the wireless device and prolong the use of the battery Life.In this strategy, the wireless transmitting terminal transmits data periodically to detect the channel with the best channel state under the given transmission delay range, but delays the data transmission due to the increased number of channel detection , So this paper introduces a discount function, which turns the problem into a discount with the Secretary problem, and finally find the optimal stop rule.The experimental results show that the strategy proposed in this paper has a smaller average energy consumption per unit of data for improving the wireless network The energy efficiency is of great significance.