International Journal of Advancements in Computing Technology Volume 2, Number 2, June, 2010 117 New clustering protocol to decrease probability failure nodes and increasing the lifetime in WSNs Davood KeyKhosravi *1 , Ali Ghaffari *2 , Ali Hosseinalipour *3 and Batool Abadi Khasragi *4 *1 Islamic Azad University Tabriz Branch, Tabriz, Iran *2 Islamic Azad University- Tabriz Branch, Tabriz, Iran *3 Sama organization (Affiliated with Islamic Azad University), Mamagan Branch, Iran *4 Islamic Azad University Osku Branch, Osku, Iran Kaikhosravi2003@Yahoo.com, A.Ghaffari@iaut.ac.ir ,Ali.Hosseinalipour@yahoo.com and Batool.Abadi@gmail.com doi: 10.4156/ijact.vol2.issue2.11 Abstract Clustering in wireless sensor networks is one of the crucial methods for increasing of network lifetime. There are many algorithms in for clustering. LEACH algorithm is one of the important clusters based in wireless sensor network. In this paper we proposed a new clustering method for increasing of network lifetime. In this we distribute several sensors with a high-energy for managing the cluster heads and decrease their responsibilities in network. These sensors are used as a gateway between head cluster and base station. The simulation results shows, new clustering protocol decrease probability of failure nodes and increasing lifetime in WSNs. Keywords: Network Clustering, Nodes failure, Energy-Aware Communication, Wireless Sensor Networks 1. Introduction Recent improvements in integrated circuits (IC) have fostered the emergence of a new generation of tiny, called sensors. That from economical aspect they are commodious and also they are used in two groups military (for instance battlefield observing, security) and non military (for instance Environmental managing: temperature, pressure, tremor, etc) [1, 2]. To consider having group of limitations such as battery life time, calculating and memory significantly they have been predicted as non recyclable and also they live until their powers fade away. So energy is a rare source for sensors. During a special mission the correct consumption for sensors lifetime should be managed consciously [3]. The power of sensor could not support far connections. So, they need multi sectional architecture to transmit their connections. A useful way to decrease the system lifetime is to divide them to diverse clusters [3]. Parts of a cluster-based network sensor are base station (Sink) and sensors. In this method sensors relay the data flow by head clusters. The Sink always stays far from where sensors are expanded. In this manner saving the consumption energy and awareness of that to communicate with Sink has various methods. Two routing methods proposed in articles of 4, 5 in references. These methods because of routing detection and finding of optimums steps in relation with Sink have overhead. In addition, they will have extra load on nodes that are located around Sink, so most of the traffic will be from them. To avoid these overheads and unbalanced consumption of energy some high-energy nodes called”Gateways” are deployed in the network [3]. These sensors are used as head clusters due to decrease the failure probability of head clusters and increases the lifetime of the network. Since this method takes a lot of cost. So in this article we just use these sensors as manager for a number of head cluster. So, each of them becomes gateway among head clusters and Sinks. In the next sections we define the architectural model of sensor networks and summarize the related work. Section 3, he proposed protocol has been explained and in section 4 the results of simulation and tests evaluation will be seen. And finally in part 5 we have conclusion of the article and discussing about pattern of future researches.