Technical Report Number
Many mission-critical wireless sensor network applications must resolve the inherent conflict between the tight resource constraints on each sensor node, particularly in terms of energy, with the need to achieve desired quality of service such as end-to-end real-time performance. To address this challenge we propose the Real-time Power-Aware Routing (RPAR) protocol. RPAR achieves required communication delays at minimum energy cost by dynamically adapting the transmission power and routing decisions based on packet deadlines. RPAR integrates a geographic forwarding policy cognizant of deadlines, power, and link quality with new algorithms for on-demand power adaptation and efficient neighborhood discovery. Simulations based on a realistic radio model of MICA2 motes show that RPAR significantly reduces the number of deadline misses and energy consumption when compared to existing real-time and energy-efficient routing protocols and beacon based neighborhood management schemes.
Chipara, Octav; He, Zhimin; Xing, Guoliang; Chen, Qin; Wang, Xiaorui; Lu, Chenyang; Stankovic, John; and Abdelzaher, Tarek, "Real-time Power Aware Routing in Wireless Sensor Networks" Report Number: WUCSE-2005-31 (2005). All Computer Science and Engineering Research.