基于自相似流的IEEE 802.16e休眠算法

为了减少移动站点的功率消耗,降低服务基站空中资源的使用,IEEE802.16e引入了休眠模式。移动站点与服务基站协商后进入休眠周期并暂时终止业务服务。休眠模式算法目前研究工作大都基于包到达服从泊松过程的假定来设计与分析算法,但研究表明,数据包到达的时间间隔遵循类似Pareto分布的重尾分布。针对网络流量的自相似特性,提出指数递减的休眠模式算法。理论分析与实验表明,此算法在平均响应时间和平均能量消耗方面都要优于IEEE802.16e协议所建议的指数递增休眠模式算法。

Sleep-Mode Algorithm in IEEE 802.16e Based on Self-Similar Stream

In order to reduce the power consumption of a mobile station, IEEE802.16e introduces the sleep mode, in which a mobile station stops its normal service.Network arrivals are often modeled as a Poisson process for analytic simplicity,but recent traffic Studies have shown that data packet inter-arrivals including Pareto distribution, are not exponentially distributed, but are heavy-tailed distributed, including Pareto distribution.In order to balance the average energy consumption and the average waiting time, this paper proposes a power function decrease algorithm for sleep mode based on Pareto distribution.Experiments and theoretical analysis show that the algorithm has a lower average energy consumption and shorter average waiting time than the algorithm proposed in IEEE 802.16e standard.