Towards unified radio power management for wireless sensor networks

Guoliang Xing, Mo Sha, Greg Hackmann, Kevin Klues, Octav Chipara, Chenyang Lu
2009 Wireless Communications and Mobile Computing  
Many wireless sensor networks must sustain long lifetimes on limited energy resources. Two major approaches, transmission power control and sleep scheduling, have been proposed to reduce the radio power consumption in the transmission state and the idle state, respectively. In this paper, we first review existing transmission power control and sleep scheduling approaches and then describe a Unified Radio Power Management framework for the design and implementation of holistic radio power
more » ... radio power management solutions in wireless sensor networks. It has two key components: (1) a novel optimization approach called Minimum Power Configuration that minimizes the aggregate radio power consumption of all ratio states and (2) a Unified Power Management Architecture (UPMA) that aims to support the flexible cross-layer integration of different power management strategies. A novel feature of UPMA is that it enables cross-layer coordination and joint optimization of different power management strategies that exist at multiple network layers. additional energy at run time, the amount of energy available remains scarce. Therefore, power management is crucial for making WSNs viable in many realworld applications. Radio is a major source of energy consumption in WSNs. Table I shows the power characteristics of two representative radio interfaces widely used in existing wireless sensor platforms. Two observations can be drawn from this table. First, the transmission power consumption has a wide tunable range, which offers opportunities for significant energy saving. Second, the power consumption in sleep state is several orders of G. XING ET AL. of the links in a test-bed composed of 60 Mica motes experienced more than 30% packet loss even under light workloads. Consequently, up to 80% of the total energy consumption of the radio was attributed to packet loss
doi:10.1002/wcm.622 fatcat:wxhzyljnhracxhfu4jtivb32ue