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Vol. 162, Issue 1, January 2014, pp. 136-140




LEACH-A: An Adaptive Method for Improving LEACH Protocol

Jianli ZHAO, Lirong YANG

College of Information Science & Engineering, Shandong University of Science and Technology, Qingdao, China
Tel.: 8613791991751, fax: 8653286057880

E-mail: zhaojianli@gmail.com


Received: 13 November 2013 /Accepted: 9 January 2014 /Published: 31 January 2014

Digital Sensors and Sensor Sysstems


Abstract: Energy has become one of the most important constraints on wireless sensor networks. Hence, many researchers in this field focus on how to design a routing protocol to prolong the lifetime of the network. The classical hierarchical protocols such as LEACH and LEACH-C have better performance in saving the energy consumption. However, the choosing strategy only based on the largest residue energy or shortest distance will still consume more energy. In this paper an adaptive routing protocol named “LEACH-A” which has an energy threshold E0 is proposed. If there are cluster nodes whose residual energy are greater than E0, the node of largest residual energy is selected to communicated with the base station; When all the cluster nodes energy are less than E0, the node nearest to the base station is select to communication with the base station. Simulations show that our improved protocol LEACH-A performs better than the LEACH and the LEACH-C.


Keywords: Wireless sensor network, LEACH, LEACH-C, Energy efficient.


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