Tinydb: An acquisitional query processing system for sensor networks

In the past few years, smart sensor devices have matured to the point that it is now feasible to deploy large, distributed networks of such devices [Pottie and Kaiser 2000; Hill et al. 2000; Mainwaring et al. 2002; Cerpa et al. 2001]. Sensor networks are differentiated from other wireless, battery-powered environments in that they consist of tens or hundreds o