Abstract-Mobile sensors are useful in many environments because evaluation due to the difficulty of building mobile sensors. they can move to increase the sensing coverage. In this paper, we In the literature, some existing mobile sensor prototypes are present a mobile sensor prototype in which the Mica2 sensor node is the Robomote [18] and the mobile robot in [14] . However, used to control the movement of the robot built with commercial offthe-shelf (COTS) components. We use a sensor relocation application in these mobile sensors, the sensor nodes and the robots are to demonstrate the feasibility of our design. In the sensor relocation integrated, and the sensor nodes are custom designed. As a application, after a sensor node failure creates a coverage hole, a mo-result, existing popular applications developed for popular bile sensor node is relocated to cover the hole in a timely and energyefficient way. We present a distributed sensor relocation algorithm sensor platforms such as Mica2/TinyOS [4], [6] cannot be and provide novel solutions to implement this algorithm in our mobile used. To use their mobile sensor, the applications have to sensor platform. Experimental results show that our relocation algo-be rewritten in their special language. rithm can reduce the sensor relocation time and balance the energy consumption of the mobile nodes. In this paper, we present our mobile sensor design which Index Terms: Sensor networks, mobile sensor, mobile is based on commercial off-the-shelf (COTS) components. robot, mote, sensor relocation. Our mobile sensor is based on the popular sensor node plat- and mobile robot is built with COTS. The Mica2 sensor node will run TinyOS, and some instructions Recent advances in hardware design are enabling low-are provided to control the mobile robot. As a result, existcost sensors that have sophisticated sensing, communica-ing sensor network applications can be run on our mobile tion, and computation capabilities. These sensors commu-sensors without any modification. By using the added innicate via radio transmitters/receivers to form a multihop structions, the sensor node can control the movement of the wireless network, i.e., a distributed wireless sensor net-robot. work. Typical applications of wireless sensor networks are target tracking, environmental monitoring, and surveillance
In the third approach, sensor nodes themselves are mobile REF .
Sensor Relocation with Mobile Sensors: Design, Implementation, and Evaluation
2007 IEEE Internatonal Conference on Mobile Adhoc and Sensor Systems
2007 IEEE Internatonal Conference on Mobile Adhoc and Sensor Systems
Computer Science