Improving on the network lifetime of clustered-based wireless sensor network using modified leach algorithm
Wireless sensor networks (WSNs) composed from a large number of sensor node with the ability to sense and process data in the physical world in a timely manner. The sensor nodes contain a battery constraint which limit the network lifetime. Due to energy constraints, the deployment of WSNs will r...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2391/1/24p%20SALTIHIE%20ZENI.pdf http://eprints.uthm.edu.my/2391/2/SALTIHIE%20ZENI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/2391/3/SALTIHIE%20ZENI%20WATERMARK.pdf http://eprints.uthm.edu.my/2391/ |
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| Summary: | Wireless sensor networks (WSNs) composed from a large number of sensor node
with the ability to sense and process data in the physical world in a timely manner.
The sensor nodes contain a battery constraint which limit the network lifetime. Due
to energy constraints, the deployment of WSNs will required advance techniques to
maintain the network lifetime. A clustering based routing algorithm called Low-
Energy Adaptive Clustering Hierarchy (LEACH) was proposed as a solution for low
power consumption. This document is a study about LEACH algorithm where the
implementation was done using OMNeT++ network simulator to study the
performance of this algorithm in term of network lifetime. OMNeT++ was selected
as a simulator because it provides some important features for this project like very
good scalability unlike other simulators do. During this study, LEACH algorithm
shows some drawbacks that need an improvements to overcome it as to improve the
performance. Then, the modified LEACH algorithm was proposed where the
improvement was done in cluster head selection based on LEACH. In cluster head
selection, modified LEACH taking into account the residual energy of each node for
calculation of the threshold value for next round. Meanwhile in LEACH, the cluster
head selection was based on distributed algorithm. Both of these protocols was
implemented in network simulator to compare the performance. This study shows
that there were a better performance achieved by modified LEACH depends on the
results obtained. |
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