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Issue No.01 - January (2008 vol.19)
pp: 106-120
It has been discussed in the literature that the mobility of a mobile sensor network (MSN) can be used to improve its sensing coverage. How to efficiently manage the mobility towards a better coverage, however, remains unanswered. In this paper, motivated by classical dynamics that studies the movement of objects, we propose the concept of network dynamics and define the associated potential functions that capture the operational goals as well as the environment of a MSN. We find that, in managing the mobility of a MSN, Newton’s laws of motion in classical dynamics are insufficient for they introduce oscillations into the movement of sensor nodes. Instead, in network dynamics, the laws of motion are formulated using the steepest descent method in optimization. Based on the network dynamics model, we first devise a parallel and distributed algorithm (PDND) that runs on each sensor node to guide its movement. PDND then turns sensor nodes into autonomous entities capable of adjusting their locations according to the operational goals and environmental changes. After that, we formally prove the convergence of PDND. Finally, we apply PDND in three applications to demonstrate its effectiveness.
Mobile sensor networks, coverage, potential fields, jamming attack
Ke Ma, Yanyong Zhang, Wade Trappe, "Managing the Mobility of a Mobile Sensor Network Using Network Dynamics", IEEE Transactions on Parallel & Distributed Systems, vol.19, no. 1, pp. 106-120, January 2008, doi:10.1109/TPDS.2007.1113
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