RTEA: Real-Time and Energy Aware Routing for Industrial Wireless Sensor Networks

This paper proposes a real-time and energy aware routing protocol for industrial wireless sensor networks, called RTEA. Two-hop neighborhood information routing is adopted from THVR routing protocol, however our routing protocol has low control packet overhead and differentiates packets based on their deadlines. The packet deadline is updated in each hop without using globally synchronized clocks. In addition to velocity, the distance to the sink is considered for reducing the number of relaying hops. Also, the delay between two one-hop neighbors is estimated by a new mechanism which considers the time that packets spend in each node beside the link delay. Simulation results show that RTEA can improve the performance in terms of delivery ratio and energy consumption.