无线接入网QoS保证的动态载频开启节能控制

Dynamic frequency carriers on/off for energy-saving control with QoS guarantee in wireless access networks

针对复杂应用环境中无线接入网负载高波动的特点,提出一种多路载频动态开启的系统级功耗控制策略,在满足多类业务QoS的同时,降低系统基站的能耗.构建基于连续时间Markov控制过程的系统分析模型,将动态载频开启节能控制转化为一个带约束的优化问题.结合性能势估计与随机逼近,提出一种基于策略迭代的在线自适应策略优化算法.仿真实验结果验证了方法的有效性.

A system-level dynamic power management（DPM） strategy is presented to conserve energy of base stations in wireless access networks.It dynamically changes the operation state of multiple frequency carriers with the fluctuation of workloads to guarantee the QoS with minimum power consumption.First,an event-driven continuous-time Markov control processes model is introduced to formulate the DPM problem as a constrained optimization problem.Then,a policy iteration based reinforcement learning algorithm that combines potentials estimation and stochastic approximation is proposed for optimizing the DPM policy online.Simulation results demonstrate the effectiveness of the presented approach.