中文摘要：

针对使用CSMMCA通信机制的无线传感器网络提出一种通信延迟估计算法。利用链路质量具有时间和空间相关性的特点建立组、合的链路模型，预测链路可靠性，使用简化的冲突概率模型预测信道竞争延迟，结合预测的链路可靠性得到通信延迟。分析了算法的开销，在ns2模拟器上对信道竞争延迟预测算法进行了模拟，结果表明预测算法能够比较准确地预测网络的竞争延迟。

英文摘要：

This paper proposes an algorithm that estimates the communication delay in sensor networks with CSMA/CA communication mechanism. It estimates the link probability with a model based on temporal correlation and spatial correlation of link quality, and estimates the contention delay using a simple collision probability model. The simulation of the algorithm on ns2 simulator shows that the contention delay estimation of the algorithm is accurate and the time cost is always low regardless of network contention.