移动网络中基于数据到达速率的数据传输能耗优化策略

Energy Consumption Optimization Strategy for Data Transmission Based on Data Arrival Rate in Mobile Networks

数据传输能耗是移动网络能耗的重要部分,提高数据传输能耗效率是优化移动网络能耗的重要课题。考虑数据具有传输延时的要求,研究了基于数据到达速率的数据传输平均能耗最小化问题。利用无线信道质量随机变化的特征,构建基于数据到达速率的平均能耗最小化问题,然后将其转化为最优停止问题,证明最优停止规则存在。最后通过求解最优近视停止规则来获得各侦测时刻的最优传输速率阈值,实现基于数据到达速率的数据传输能耗优化策略。对提出的策略与其他策略就平均能耗、平均传递率和平均调度周期进行了仿真对比,结果表明提出的策略具有较小的平均能耗和较高的平均传递率,取得了较好的能耗优化效果。

Energy consumption of data transmission is a significant part of energy consumption in mobile networks. Ener- gy efficient transmission is an important topic to optimize energy consumption in mobile networks. The average energy consumption minimization problem based on data arrival rate was studied, when data has delay demand. The minimiza- tion problem was constructed using time-varying characteristics of wireless channel quality and it was turned into an op- timal stopping problem. The existence of optimal stopping rule was proved. Finally, the optimal myopic stopping rule was solved to obtain optimal transmission rate threshold at each detection time. Thus the energy consumption optimiza- tion strategy for data transmission based on data arrival rate was realized. Simulations compared this strategy with others in the index of average energy consumption, average delivery ratio and average scheduling period. The results show that our strategy has less average energy consumption and higher average delivery ratio, gaining better optimization effect.