Adaptive Sensor Activity Control in Many-to-One Sensor Networks

Abstract--In this paper, we consider a many-to-one sensor network where a large number of sensors are deployed to monitor a physical environment. We explore sensor activity management to maximize the network lifetime, while meeting the quality-of-service (QoS) requirement. Specifically, in each round the sink estimates the number of active sensors and the control information is fed back to the sensors for activity control. We start with a basic case where the total number of sensors is known, and the estimator of the number of active sensors ^ is accurate. We devise a sensor activity control scheme under which the number of active sensors would converge to the minimum that can meet the QoS requirement. Next, we generalize the study to the following two more complicated cases: (1) The case with known and inaccurate ^ : For this case, we propose a stochastic approximation algorithm to minimize the average number of active sensors while meeting the QoS requirement. (2) The case with unkno...

• Type: Journal
• Year: 2006
• Where: JSAC
• Authors: Zhifeng Hu, Junshan Zhang, Lang Tong
• Keywords: Active Sensors, JSAC 2006, Sensor Activity, Sensors