摘要
为了有效分析无线传感器网络WSN(Wireless Sensor Network)中传感器节点的性能,并为WSN的参数设置及相关能量节省策略的研究提供理论依据,基于IEEE 802.15.4中的功率管理模式,考虑由休眠模式返回激活模式的切换过程,针对网络中的突发业务,建立一个带有启动机制的批量到达的离散时间排队模型。采用嵌入Markov链方法,导出该排队模型稳态指标,并给出数据帧平均响应时间及系统平均功耗的表达式。完成数值例子,并通过平均功耗的变化趋势给出限定条件下的星座体积最优值。
In order to analyze the performance of the sensor nodes in WSN effectively,and to provide theoretical basis for the setting of the system parameter and the research of related energy saving strategy,based on the power management mode proposed in IEEE 802.15.4,considering the switching procedure from the sleep mode to the active mode and the bursty property in the network traffic,a discrete-time batch arrival queueing model with a setup was built.Using the method of embedded Markov chain,this paper analyzed the queueing model in steady state.Moreover,it presented the performance measures in terms of the average response time and the average power consumption. Numerical results are provided,and the optimal value of the constellation size is given with the average power consumption under certain condition.
出处
《仪表技术与传感器》
CSCD
北大核心
2010年第5期86-88,91,共4页
Instrument Technique and Sensor
基金
国家自然科学基金资助项目(No.10671170)
河北省自然科学基金资助项目(No.F2009000475)
