Abstract: According to the operation mechanism of the sleep mode for the power saving type I in IEEE 802.16e, this paper builds a multiple vacation queueing model with exponential variational vacation length. The queueing parameters such as queueing length with steady state, the average waiting time and the average busy cycle are given. The formula of the energy saving ratio and the performance measure of average response time are derived. Dependency relationship between the system performance measures and the size of initial sleep window are obtained through numerical examples.

Key words: power saving type I, sleep mode, multiple vacation queueing system, performance measure

摘要： 根据IEEE 802.16e中的休眠模式节能类型Ⅰ的工作机制，建立休假长度呈指数变化的多重休假排队模型。给出稳态队长、平均等待时间、平均忙循环等排队参数。推导出能量节省率和平均响应时间性能指标的表达式，通过数值例子得到系统性能指标与初始休眠窗口大小的依赖关系。

关键词: 节能类型Ⅰ, 休眠模式, 多重休假排队系统, 性能指标

CLC Number: 

• TP393.07