A Reliable Routing Algorithm Based on Link Quality Evaluation for Wireless Sensor Networks

摘要

Due to the lack of accurate evaluation of the transmission characteristics of the wireless communication links, routing algorithms in wireless sensor networks may result in poor network performance. This paper presents a link quality-based reliable routing algorithm. According to the link qualities evaluated by RSSI, neighbor nodes can be partitioned into different regions. First, based on a realistic link model and test results, an asymmetric link region is indicated, where selecting a neighboring node in this region as the next hop node will greatly degrade the transmission reliability. Based on this, the neighboring area of a node is divided into four regions, that is, connected, transitional, asymmetric, and disconnected regions. Then, route selection ways for different regions are presented, and different priorities of the nodes in different regions to be selected as the next hop node are assigned. Finally, the performance of the RSRE is tested in a real-world test-bed consists of 40 nodes, and compared with the Min-hop routing algorithm and the ETX based routing algorithm. The results show that the RSRE has better data transmission reliability, and hop distribution.