摘要: 为提高IEEE 802.16e中I-型节能方案的服务质量,用马尔可夫到达过程刻画数据流的到达,建立带有多重异构休假的离散时间DMAP/G/1排队模型。采用分解定理方法和Little公式完成该排队模型的理论,分析并导出IEEE 802.16e中休眠工作模式下能源节约率和数据包平均延迟时间等系统性能指标。通过数值例子证明,在该模型中休眠模式性能指标和系统配置参数之间存在依赖关系。
关键词:
IEEE 802.16e标准,
休眠模式,
马尔可夫到达过程,
稳态队长,
平均逗留时间
Abstract: For the sleep mode operation of type I-power saving mechanism in IEEE 802.16e, considering down-link traffic only and describing the arrival process as Markovian arrival process, a discrete-time DMAP/G/1 queue model with multiple vacations is built. Employing factorization principle method and Little’s law, the queue model built in this paper is analyzed, and the performance measures of the energy saving rate and the mean delay time of packets for sleep mode in IEEE 802.16e are derived. Numerical results are given to demonstrate the dependency relationships between the system performance measures and system parameters.
Key words:
IEEE 802.16e standard,
sleep mode,
Markovian arrival process,
steady-state queue length,
mean sojourn time
中图分类号:
张丽媛, 霍占强. IEEE 802.16e中休眠模式的建模与分析[J]. 计算机工程, 2011, 37(14): 73-75.
ZHANG Li-Yuan, HE Tie-Jiang. Modeling and Analysis of Sleep Mode in IEEE 802.16e[J]. Computer Engineering, 2011, 37(14): 73-75.