ABSTRACT

Wireless sensor network is the network of tiny size of sensor nodes. These sensor nodes have sensing capability and transmit the sensed information to sink node. If the energy of sensor nodes is not utilised properly, it results in performance degradation of the network. Sleep scheduling approach and cooperative communication techniques can be employed to enhance the network performance. Cooperative communication follows the relay-based transmission. The nodes turn its radio sleep and awake in sleep scheduling approaches. This paper considers the merits of both techniques and proposes the sleep scheduling-based cooperative data transmission approach for WSN. In this approach, optimal number of virtual cluster heads are calculated by the sink node according to the number of nodes and area of interest. The real cluster head is decided based on the distance and energy of the sensor nodes from the virtual cluster head. The node is paired with each other and follows the sleep scheduling approach. Further, the energy-efficient relay selection and data transmission according to cooperative technique improves the network performance. The simulation analysis shows that the proposed routing protocol outperforms the related existing routing protocols.

摘要

无线传感器网络是由微小的传感器节点组成的网络。这些传感器节点具有感知能力，并将感知到的信息传输到汇聚节点。如果传感器节点的能量没有得到适当的利用，就会导致网络性能下降。可以采用睡眠调度方法和协作通信技术来提高网络性能。协作通信遵循基于中继的传输。节点在睡眠调度方法中将其无线电睡眠和唤醒。本文综合考虑了两种技术的优点，提出了基于睡眠调度的无线传感器网络协同数据传输方法。在该方法中，Sink节点根据节点数和感兴趣区域计算出最优虚拟簇头数。真正的簇头是根据传感器节点与虚拟簇头的距离和能量来决定的。节点相互配对并遵循睡眠调度方法。此外，基于协作技术的节能中继选择和数据传输提高了网络性能。仿真分析表明，所提出的路由协议优于现有的相关路由协议。