Comparative Analysis of Classical Routing Protocol LEACH and Its Updated Variants that Improved Network Life Time by Addressing Shortcomings in Wireless Sensor Network

LEACH (Low energy adaptive clustering Hierarchy) is considered to be a first dynamic routing protocol used in Wireless Sensor Networks. It effectively increases the network life time and out perform the direct communication protocol, minimum-transmission-energy protocol and static clustering protocol. In recent years, number of variants has been proposed. This paper is based on the comparative analysis of different updated variants after defining the shortcomings associated with LEACH.