连接探测效率对延迟容忍移动传感器网络(Delay-Tolerant Mobility Sensor Network,DTMSN)的性能有着重要的影响.该文在对随机路点(Random Way-Point,RWP)移动模型统计特性研究的基础上,提出一种面向RWP的DTMSN自适应连接探测机制(Adaptive Contact-Probing Scheme,ACPS).其基本思想是节点根据每次移动过程中连接到达率的不同,自适应地调整连接探测次数和探测时间,通过提高探测效率和探测准确性来降低探测能量开销和连接发现延迟.仿真结果表明,与固定周期探测机制(Fixed-cycle Probing Scheme,FPS)相比,ACPS能够以较低的能量开销取得更高的探测成功率和更短的连接发现延迟.%The efficiency of contact probing has an important impact on the performance of Delay-Tolerant Mobility Sensor Network (DTMSN). An Adaptive Contact Probing Scheme (ACPS) of DTMSN is proposed, which is based on the study of stochastic properties of Random Way-Point (RWP) mobility model. The main idea of ACPS is to adjust adaptively the time and the number of contact probing according to the arrival rate of contact arrival process. The scheme can effectively deduce the probing energy cost and contact discovery delay by improving the probe efficiency and accuracy. Simulation results show that the proposed ACPS has higher discovery ratio and lower discovery delay than the Fixed-cycle Probing Scheme (FPS).
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