低功耗有损网络中节点缓存空间模型分析

为了节省无线传感器网络中节点的能量,节点在保证网络质量的前提下,应该能够在睡眠和唤醒两种状态间动态切换.文中为传感器节点建立了两种不同有限缓存空间的马尔可夫模型,通过分析这两种模型,可得到节点的丢包率,根据丢包率得出数据包的到达速率和服务速率以及节点状态切换对于缓存空间大小的影响,仿真结果证明,在缓存空间大小确定的情况下能适当地设定占空比,可以提高网络质量.

Analysis on Node Buffer Model in Constrained Low-Power and Lossy Network

In order to save the battery capacity of sensor nodes in wireless sensor network,it is necessary for nodes to be able to switch between the states of sleep and active on the premise of meeting the requirements of network QoS.Two finite buffer Markov models are established for sensor nodes and model analysis is made to get the packet loss rate.Furthermore the packet arrival rate and service rate and the impact of node state switching on the size of buffer space are reached.Simulation results have shown that,for the case of fixed buffer size,network QoS can be improved by appropriate setting of the buffer duty cycle.