Sink Mobility Strategies for Reliable Data Collection in Wireless Sensor Networks

摘要

The Internet of Things and machine-to-machine communications will form one of the most important backbones of our life in the near future. Therefore, more reliability is required in many wireless sensor network applications, such as structural health monitoring systems, intruder detection systems, and search and rescue systems. However, without the assumption that all sensor nodes can reach a sink node through multi-hop communication and that the connectivity among all sensor nodes is stable, it is difficult to guarantee the reliability of data collection. In this paper, we focus on controlling the mobility of a mobile sink and propose two types of mobility strategies to collect sensing data certainly from all sensor nodes in an observed area. One strategy is to learn the positions of all isolated networks in the observed area and the other is to collect sensing data using the learned positions. Through computer simulations, we show that the mobile sink with the mobility strategies can collect the sensing data from all sensor nodes.