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This paper presents a distributed algorithm for a mobile sensor network to track targets with unknown motion. We formulates the target tracking as a multi-objective optimization problem which integrates the tracking quality, the energy saving and the network connectivity. To cope with sensing noises, we use the determinant of the covariance matrix of target estimation as the tracking quality measure...
This paper presents a fully distributed algorithm for target tracking using a mobile sensor network. It tries to maintain the target being visible to the mobile network all the time while consuming as little motion energy as possible. Meanwhile the network connectivity is maintained. At every time, only the nodes around the target are activated while other nodes keep idle. Certain functions are defined...
Autonomous deployment of mobile agents for coverage enhancement is an important issue in wireless sensor networks. The major challenge lies in the requirement of efficient distributed and localized computing. In addition, managing the coverage of heterogeneous sensing model is complicated due to the diversity of sensing ranges and the irregularity of coverage holes. This paper presents two distributed...
This paper addresses the problem of tracking a mobile target using a mobile sensor network while minimizing the energy consumption and maintaining the network connectivity during the tracking process. While minimizing the tracking energy consumption is proved to be NP-complete, an approximately optimal solution named breadth-first leader-follower strategy is presented. Nodes close to the target predicted...
This paper addresses the problem of deploying a set of mobile sensor nodes of heterogeneous sensing ranges to give a large and connected coverage. A novel deployment algorithm based on the circle packing technique is given. It iteratively enhances the coverage area of the sensor network from an initial random deployment, while guarantees the absence of coverage hole and obstacle avoidance. The sensing...
This paper presents a novel algorithm for autonomous deployment of active sensor networks. The algorithm aims to enhance the sensing coverage based on an initial placement of sensor nodes. The sensing regions are modeled as circular discs of variable sensing range limits. The problem of placing these circular discs to cover a field is intuitively transformed to the circle packing problem: given the...
This paper presents a novel algorithm, called ISOGRID (isometric grid-based algorithm), for autonomous deployment of mobile sensor networks. Upon an initial random placement of sensor nodes, the algorithm iteratively computes node movements to enhance sensing coverage and avoid obstacles while ensuring sensor connectivity. The principle is to redeploy the sensor nodes such that the communication graph...
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