Abstract
In the past few decades, Wireless sensor networks have exhibited a significant amount of growth and have been used in various applications like traffic control, environment monitoring etc. It comprises an accumulation of sensor nodes that sense the data from their surroundings and relay it to the base station. The network suffers from the limited energy constraints since the sensor nodes are mobile nodes and they run out of battery after a considerable amount of time. To overcome this, a certain level of heterogeneity is introduced among the nodes in terms of energy consumption to sustain the overall network lifetime. Various protocols are developed to prolong the network longevity. Among those, PEGASIS (Power-Efficient Gathering in Sensor Information Systems) and LEACH (Low- Energy Adaptive Clustering Hierarchy) are the significant ones, which ensures power-efficient gathering of the data in the sensor networks. This paper attempts to discuss the different aspects of PEGASIS and LEACH and their advantages and disadvantages in detail.
Highlights
Recent amelioration in the MEMES-based technology and digital electronics has made it possible to design the low -power micro sensors [1 3] that are sensitive to assimilate the data from their surroundings
On the basis of the network structure, routing protocols are divided into three categories: flat routing, cluster based or hierarchical routing and location based routing
The whole network is segmented into clusters and a node in each cluster is designated as cluster head which has special tasks from the regular nodes
Summary
Recent amelioration in the MEMES-based technology and digital electronics has made it possible to design the low -power micro sensors [1 3] that are sensitive to assimilate the data from their surroundings. These micro sensors are deployed in an area which can perceive, locate and collect the information and forward it to a centralized authority like base station. The whole network is segmented into clusters and a node in each cluster is designated as cluster head which has special tasks from the regular nodes It contributes considerably in improving the scalability, energy efficiency and lifetime of the network. Rest of the paper is organized as follows: Section 2 discusses elaborately the related work in the literature, section 3 compares the protocols: LEACH and PEGASIS in terms of various parameters, section 4 discusses issues in the protocols and section 5 concludes the study
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