Abstract
Target coverage is a challenging task in the field of wireless sensor networks aiming to observe a set of critical targets while considering the limited resources and the network lifetime is improved. The paper proposes an approach to : i) determine the strategy according to which the critical targets can be monitored while satisfying a certain confidence level. ii) determine the maximum and minimum number of nodes which can guarantee the coverage, iii) determine the optimal number of active nodes for various deployment strategies, iv) to determine a routing mechanism using either single hop/multi hop communication based on the reachability of the node to the base station and iv) to develop an aggregation protocol which can reduce the redundancy and number of packet transmissions. The proposed protocol is based on the two level aggregation at the set cover level and at the cluster level using the concept of Locality Sensitive Hashing (LSH) and Jaccard Similarity measure. The efficiency of the proposed aggregation mechanism is determined for various data sets of multiple dimensions. The results obtained through the simulations show the improvement in the network performance with respect to the network longevity, coverage, reliability and of the data transmission as compared to the Boolean coverage model
Highlights
Target coverage is a challenging task in the field of wireless sensor networks aiming to observe a set of critical targets while considering the limited resources and the network lifetime is improved
The rest of the paper organization is as follows: state of the art in section 2, proposed deployment, routing and aggregation approaches in section 3, simulation results and discussion in section 4 and section 5 is about the conclusion
The results are shown in Fig.3.The results show the exponential decay in the number of nodes with the increase in the sensing range. It can be observed from the results that there is large number of nodes for the hexagonal deployment; the effective area covered is increased with the increase in the data acquisition process
Summary
Target coverage is a challenging task in the field of wireless sensor networks aiming to observe a set of critical targets while considering the limited resources and the network lifetime is improved. Coverage is usually considered as a quality of service parameter which determines the duration and magnitude of coverage of the given target region, whereas energy conservation approaches aim to devise a mechanism to maximize the network lifetime. These objectives can be met by scheduling the nodes in various set covers such that all the targets are monitored. The sensor nodes are usually deployed in random manner, so nearby sensors tend to sense the redundant or correlated data In this case the energy conservation is achieved by maintaining the unnecessary nodes in the low energy mode, while other nodes are kept in high energy mode to observe the targets according to the mechanism devised by the base station.
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