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On the Double Mobility Problem for Water Surface Coverage with Mobile Sensor Networks

机译：移动传感器网络对水面覆盖的双重迁移问题

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We are interested in the sensor networks for scientific applications to cover and measure statistics on the sea surface. Due to flows and waves, the sensor nodes may gradually lose their positions; leaving the points of interest uncovered. Manual readjustment is costly and cannot be performed in time. We argue that a network of mobile sensor nodes which can perform self-adjustment is the best candidate to maintain the coverage of the surface area. In our application, we face a unique double mobility coverage problem. That is, there is an uncontrollable mobility, U-Mobility, by the flows which breaks the coverage of the sensor network. Moreover, there is also a controllable mobility, C-Mobility, by the mobile nodes which we can utilize to reinstall the coverage. Our objective is to build an energy efficient scheme for the sensor network coverage issue with this double mobility behavior. A key observation of our scheme is that the motion of the flow is not only a curse but should also be considered as a fortune. The sensor nodes can be pushed to some locations by the U-Mobility that potentially help to improve the overall coverage. With that taken into consideration, more efficient movement decision can be made. To this end, we present a dominating set maintenance scheme to maximally exploit the U-Mobility and balance the energy consumption among all the sensor nodes. We prove that the coverage is guaranteed in our scheme. We further propose a fully distributed protocol that addresses a set of practical issues. Through extensive simulation, we demonstrate that the network lifetime can be significantly extended, compared to a straightforward back-to-original reposition scheme.
机译：我们对用于科学应用以覆盖和测量海面统计数据的传感器网络感兴趣。由于流量和波动，传感器节点可能会逐渐失去位置。留下兴趣点。手动调整成本高昂，无法及时执行。我们认为可以执行自我调整的移动传感器节点网络是保持表面积覆盖的最佳人选。在我们的应用程序中，我们面临一个独特的双重移动覆盖问题。就是说，流动导致了不可控制的移动性，即U-移动性，这破坏了传感器网络的覆盖范围。此外，移动节点还具有可控制的移动性C移动性，我们可以利用它来重新安装覆盖范围。我们的目标是针对具有这种双重移动性行为的传感器网络覆盖问题构建节能方案。对我们的方案的关键观察是，流动的运动不仅是一种诅咒，而且还应被视为一种财富。 U-Mobility可以将传感器节点推到某些位置，这可能有助于改善总体覆盖范围。考虑到这一点，可以做出更有效的运动决策。为此，我们提出了一套主要的维护方案，以最大程度地利用U-Mobility并平衡所​​有传感器节点之间的能耗。我们证明我们的方案可以保证覆盖范围。我们进一步提出了解决一系列实际问题的完全分布式协议。通过广泛的仿真，我们证明了与简单的从头到尾的原始重新放置方案相比，网络寿命可以大大延长。

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