Background:
Target coverage is considered as a significant problem in the area of wireless sensor
networks which usually aims at monitoring a given set of targets with the required confidence level so that network
lifetime can be enhanced while considering the constraints of the resources.
Objective:
To maximize the lifetime of the sensor network and minimize the overhead involved in the scheduling
approach, such that the pre specified set of targets is monitored for longer duration with the required confidence level.
Methods:
The paper uses a fuzzy logic system based on Mamdani inference in which the node status to remain in the
active state is determined on the basis of coverage probability, trust values and node contribution. The rule set for
determining the set cover is optimized by using the rough set theory which aims to determine the node validity for the
trust calculation.
Results:
The results show that the proposed approach improved the network performance in terms of processing time,
throughput and energy conservation by a factor of 50%, 74% and 74% respectively as compared to the existing
approaches.
Conclusion:
The paper proposes a scheduling strategy of the nodes for target coverage as an enhancement to the energy
efficient coverage protocol (EECP) on the basis of rough set theory. The rule set for determining the set cover is optimized
by using the rough set theory so that the network performance is improved in terms of the processing time, throughput and
energy consumption.
Current and Future Developments:
In this paper we have optimized the performance of EECP protocol by considering
the concept of Rough Set Theory, which determined the validity of the nodes in the trust calculation. We have evaluated
the performance through a number of simulations and the results show the comparative improvement in terms of the
processing time, throughput and energy conservation.
To utilize the unutilized nodes in the current round for the coverage enhancement is our future work. We also aim to study
the effects of heterogeneity on the performance of the proposed protocol in future.
Declaration:
The authors declare that the research article is author’s original work and have not been sent/ published
elsewhere.