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首页> 外文期刊>Parallel and Distributed Systems, IEEE Transactions on >Dynamic Coverage of Mobile Sensor Networks
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Dynamic Coverage of Mobile Sensor Networks

机译：移动传感器网络的动态覆盖

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摘要

We study the dynamic aspects of the coverage of a mobile sensor network resulting from continuous movement of sensors. As sensors move around, initially uncovered locations may be covered at a later time, and intruders that might never be detected in a stationary sensor network can now be detected by moving sensors. However, this improvement in coverage is achieved at the cost that a location is covered only part of the time, alternating between covered and not covered. We characterize area coverage at specific time instants and during time intervals, as well as the time durations that a location is covered and uncovered. We further consider the time it takes to detect a randomly located intruder and prove that the detection time is exponentially distributed with parameter 2lambda r bar{v}_s where lambda represents the sensor density, r represents the sensor's sensing range, and bar{v}_s denotes the average sensor speed. For mobile intruders, we take a game theoretic approach and derive optimal mobility strategies for both sensors and intruders. We prove that the optimal sensor strategy is to choose their directions uniformly at random between [0, 2pi ). The optimal intruder strategy is to remain stationary. This solution represents a mixed strategy which is a Nash equilibrium of the zero-sum game between mobile sensors and intruders.
机译：我们研究了由于传感器的连续移动而导致的移动传感器网络覆盖范围的动态方面。当传感器四处移动时，最初发现的位置可能会在以后被覆盖，现在可以通过移动传感器来检测在固定传感器网络中可能永远无法检测到的入侵者。但是，覆盖范围的这种改善是以某个位置仅部分覆盖时间，在覆盖范围和未覆盖范围之间交替为代价的。我们在特定的时间点和时间间隔内，以及区域被覆盖和未被发现的持续时间，对区域覆盖范围进行表征。我们进一步考虑检测随机定位的入侵者所花费的时间，并证明检测时间与参数2lambda r bar {v} _s呈指数分布，其中lambda代表传感器密度，r代表传感器的感应范围，bar {v} _s表示平均传感器速度。对于移动入侵者，我们采用博弈论方法，并得出传感器和入侵者的最佳移动性策略。我们证明了最佳的传感器策略是在[0，2pi）之间随机均匀地选择其方向。最佳入侵者策略是保持稳定。该解决方案代表了一种混合策略，该策略是移动传感器与入侵者之间的零和游戏的纳什均衡。

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