Author : Samidha N. Kalwaghe and Atul V. Dusane

The emerging technology of wireless sensor network (WSN) is expected to provide a broad range of applications, such as battlefield surveillance, environmental monitoring, and smart spaces and so on. The coverage problem is a fundamental issue in WSN. There has been lot of work done in the field of Hole detection and healing in WSN. This paper aims to address the work of hole detection and healing in mobile WSNs by various Authors. A detailed literature review of networks boundary, hole identification and various issues related to each of them are also provided. the algorithms are categorized into proper categories for better understanding and have identified various issues in each category. By considering this issues. A modified hole detection and healing method is proposed, that could remove the drawbacks of existing algorithms. Proposed method, HEAL is a distributed and localized algorithm that operates in two distinct phases. First, is Distributed Hole Detection (DHD) proposed to identify the boundary nodes and discover holes. Second, is hole healing which uses a virtual forces based hole healing algorithm. Unlike existing algorithms, proposed algorithm uses QURD based node detection method and could be cost efficient as node selection depends upon the lowest residual energy node. Thus providing energy efficient and cost efficient Hole detection and Healing method.

Keywords: Wireless Sensor Network, Coverage Holes, Boundary Detection, Hole Healing.

Article published in International Journal of Current Engineering and Technology, Vol.4, No.6 (Dec-2014)