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在Sink移动的无线传感器网络中,安全性和连通性是密钥预分配方案研究中的两个难点.根据节点间安全通信的设计原理,移动Sink节点与传感器节点按一定概率进行安全通信,当网络规模较大时存在大量节点无法与移动Sink节点进行通信,从而降低整个网络的数据收集率.针对这一问题,基于算法N-PGPS为网络提供安全通信的前提下,提出了一种基于树的密钥预分配方案IN-PGPS.该方案以移动Sink节点为根节点,与其通信范围内的传感器节点构成一颗局部树,以此提高传感器节点与移动Sink节点连通的概率、提高网络连通性.分析结果表明,与已有的密钥预分配方案相比,IN-PGPS方案有效提高了网络的连通性.
In Sink mobile wireless sensor networks, security and connectivity are two difficulties in the study of key pre-allocation scheme.According to the design principle of secure communication between nodes, mobile Sink nodes and sensor nodes communicate with each other with a certain probability, When the network size is large, a large number of nodes can not communicate with mobile Sink nodes, so as to reduce the data collection rate of the entire network.Aiming at this problem, based on the algorithm N-PGPS to provide secure communication for the network, Key scheme IN-PGPS.The proposed scheme uses a mobile Sink node as a root node and forms a local tree with the sensor nodes within its communication range, so as to improve the probability of the sensor node communicating with the mobile Sink node and improve network connectivity The analysis results show that the IN-PGPS scheme can effectively improve the network connectivity compared with the existing key pre-allocation scheme.