分布式融合算法在WSANs中的性能分析

摘要

在无线传感器执行器中，执行器节点接收传感器节点传来的信息并执行相应的动作。为了满足执行器节点及时地采取行动，无线传感器执行器网络对时延有严格的限制。构建了一种一般性的分布式融合算法并与集中式融合算法比较。通过从网络传输时延、节点能量消耗、网络寿命、有效传输次数等方面分析了这种算法在无线传感器执行器网络中的特性。在三种典型拓扑结构下的仿真实验表明，在相同条件下，分布式融合算法比集中式融合算法具有更小的网络传输时延，更长的网络寿命，同时节点的能量消耗更加均匀。%Wireless Sensor and Actor Networks(WSANs)employ actor nodes that can collect data from sensors and perform application specific actions. To meet the demand of taking actions promptly, minimizing the time of gathering data is desirable. A general distributed fusion algorithm is proposed to compare with a general centralized fusion algorithm. This paper analyzes its features in transmission delay, node energy consumption, network lifetime and the probability of transmission failure. The simulation results on three different typical topological structures indicate that the distributed fusion algorithm can achieve less transmission delay, longer network lifetime and distribute energy dissipation more evenly throughout the sensors than the centralized fusion algorithm under the same conditions.