ADSR: Angle-Based Multi-hop Routing Strategy for Mobile Wireless Sensor Networks

Though Dynamic Source Routing (DSR) is a popular on-demand algorithm designed to restrict the bandwidth consumed by control packets, the flooding of Route Request (RREQ) packets to find paths to a destination makes it difficult to apply DSR to wireless sensor networks (WSNs), which have tiny sensor nodes of limited memory and power. In this study, an angle-based multi-hop routing algorithm for mobile WSNs, which is termed ADSR, is proposed. ADSR is a variation of DSR utilizing the location information of a neighboring mobile node and a stationary sink to make the decision of dropping or rebroadcasting the RREQ packet received. ADSR focuses on reducing the number of control packets and, as a result, ADSR improves data deliveries and End-to-End delay. The experimental results using Qualnet modeler software prove that ADSR outperforms DSR in terms of overhead, data delivery, and End-to-End delay regardless of the moving speed or number of sensor nodes.