Abstract
Sensor nodes in a sensor network often operate in harsh and challenging environments and this leads to frequent failure of sensor nodes. Failure of sensor nodes leads to partitioning in the network connectivity. For significant effectiveness of applications of sensor networks, the inter-sensor connectivity among sensors is vital. Some sensors are also involved in sustaining the flow of information from the sensor to unapproachable end users. The network can be split up into multiple incoherent blocks and cease working due to physical damage or onboard energy depletion. To deal with such scenarios, a plethora of node repositioning techniques are proposed in the literature. In this article, the recent and up to date mode of research on dynamic sensor repositioning in WSN is discussed. This article classifies sensor repositioning methods into on-demand and post-deployment repositioning based on whether the optimization is accomplished at deployment time or while the network is functioning.
Highlights
Wireless Sensor Network (WSN) is marked as an influential technology and considered as a well-established research area for its wide range of applications
In the armed services, for instance, through its timely practice, defective endurance quality, and independent operation, WSN has revealed its extraordinary applicability relating the systems of armed forces involving inspection, scheming, communication, targeting, and commanding
A lot of research has been put into the Wireless Sensor Networks (WSNs) due to its immense potential for a variety of applications
Summary
Wireless Sensor Network (WSN) is marked as an influential technology and considered as a well-established research area for its wide range of applications. In the armed services, for instance, through its timely practice, defective endurance quality, and independent operation, WSN has revealed its extraordinary applicability relating the systems of armed forces involving inspection, scheming, communication, targeting, and commanding In health applications, these nodes help monitor the patients and support the patients with special needs (disabled). During the operation of WSN, some of the redundant sensors located at different locations will likely be repositioned in order to replace the sensors with depleted batteries for rectification of network stability [26] This type of dynamic repositioning might be appropriate in a mechanism that supports the target movement; the moveable ones [1].
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