动态电源管理超时策略与随机型策略的等效关系

The Equivalent Relation between Timeout and Stochastic Policies for Dynamic Power Management

为了建立动态电源管理不同类型策略优化之间的联系,研究了超时策略与随机型策略在性能与功耗均衡上的等效关系.构建了动态电源管理系统基于半Markov控制过程的随机分析模型,通过分析该系统的稳态行为,揭示了超时策略和随机型策略在性能与功耗均衡上的等效性,推导出这2种策略之间的等效关系式;证明了超时策略具有最优的动态电源管理效果,并使得2种类型策略的优化结果能够相互转换.最后通过无线通信节点动态电源管理的数值仿真验证了这种等效关系.

The equivalence on power-performance tradeoff of timeout and stochastic polices for dynamic power management is studied. The power-managed systems controlled by timeout or stochastic policies are formulated as semi-Markov control processes. Under this analytical framework, by analyzing the steady-state behaviors of the power-managed systems, the equivalence on performance-power tradeoff of timeout and stochastic policies is revealed, and the equivalent relation between these two types of policies is derived. The analysis results are demonstrated by numerical simulation experiments.