Routing and clustering optimization techniques in WSN: A review

Abstract

A WSN consists of large number of small power units called nodes that perform the operation of sensing, data collection, computation, compression, transmission. Recently there has been much stress on improvements in WSNs by designing new techniques and approaches for achieving energy efficiency and improved lifetime. Since the network is constrained in terms of capabilities of power, energy, computation it is necessary to deal with these efficiently. Previous work in survey consists of either stating extensions of a particular protocol or categorizing the various protocols. This paper tries to summarize all modified latest methods in terms of CH selection, new mathematical formulations, balancing of cluster loads, number of static sinks, linear clustering etc. Paper includes optimized LEACH-C, advanced MODLEACH, improved PEGASIS, P-LEACH, DAPTEEN, SEECH, LCH, REACH-IN.