网络性能分析是无线传感器网络中的关键问题之一。该文对基于IEEE 802.15.4标准的星形拓扑无线传感器网络性能进行分析。针对无线信道衰落所导致的隐藏终端问题,分析了传感器节点之间数据冲突的概率,并在此基础上运用理论分析的方法,推导了网络的收包率、平均延迟和平均能耗的这3个性能指标的理论表达式,并通过仿真实验进行验证。实验结果表明理论结果与仿真结果误差小于5%,证明了理论表达式的正确性和准确性。 Network performance analysis is one of the key issues in wireless sensor networks. This paper analyzes the performance of star topology WSN based on IEEE 802.15.4 standard. Aiming at the hidden terminal problem caused by the fading of wireless channel, the probability of data collision between sensor nodes is analyzed. Based on this, theoretical analysis is used to deduce the packet receiving rate, average delay and average energy consumption of the network A theoretical expression of performance indicators, and verified by simulation experiments. The experimental results show that the error between the theoretical result and the simulation result is less than 5%, which proves the correctness and accuracy of the theoretical expression.