Aditi, Rana Arun, International Journal of Advance Research, Ideas and Innovations in Technology. © 2017, www.IJARIIT.com All Rights Reserved Page | 6 ISSN: 2454-132X Impact factor: 4.295 (Volume3, Issue5) Available online at www.ijariit.com Analyze Portrayl of SEP for WSN Using Matlab Aditi M.tech Scholar PIET, Smalkha, Panipat adisoni.as90@gmail.com Arun Rana Assistant Prof. PIET, Smalkha, Panipat ranaarun1.ece@piet.co.in Abstract: Wireless Sensor Networks (WSNs) are made out of heaps of sensor nodes, with restricted energy, that cooperates to perform a sensing project. In Wireless Sensor Network, the energy efficiency is the important thing difficulty for designing the protocol because sensor nodes have one-time battery backup. There are many cutting-edge protocols which increase the life of the wireless sensor Network through correctly the use of battery energy of the sensor node. In this research work, a brand new strategy and protocol based totally on Stable Election Protocol (SEP) in wireless Sensor network have been proposed. For proposed method, we've assumed heterogeneous environment i.e. the impact of heterogeneity of nodes, in terms of their strength, in wireless sensor networks which might be hierarchically clustered. In those networks, some of the nodes grow to be cluster heads, combination the records of their cluster members and transmit it to the sink. We count on that a percentage of the population of sensor nodes is ready with extra strength assets. We additionally anticipate that the sensors are randomly distributed and aren't cellular, the coordinates of the sink and the size of the sensor discipline are known. The uniqueness of the proposed method is that cluster head is chosen amongst normal Nodes, Intermediate Nodes and Advanced Nodes based upon their common strength. This assets will increase the number of cluster heads in keeping with spherical and number of packets per spherical. First of all the nodes had been labeled as everyday Nodes, Intermediate Nodes and advanced Nodes. Then, all three kinds of nodes are similarly categorized as alive nodes and dead nodes. The cluster head is selected among all 3 types of nodes on the premise of average energy. Cluster head collects statistics from member nodes, mixture it and transmit it to the base station. Cluster head choice is maximum critical. Once the cluster head is selected then the cluster head broadcasts a commercial message to the nodes. The nodes get hold of the message and decide to which cluster head it is going to be long for the cutting-edge round. A Modified-SEP (proposed approach) has been applied and in comparison with existing SEP. Three parameters i.e. the number of dead nodes, the number of alive nodes and packets transmitted to base station and so forth has been taken as performance parameters. The simulation end result shows that overall performance and throughput of our proposed protocol deliver the effective and widespread power efficiency in addition to more Network lifetime as compared to different protocols. MATLAB R2013a has been taken as an implementation platform. Keywords: Wireless Sensor Network, Network Lifetime, LEACH, SEP etc. INTRODUCTION Wireless Sensor Networks [8] are networks of tiny, battery [3] [4] powered sensor nodes [5] [6] with limited onboard processing, storage, and radio capabilities. Nodes sense [2] and send their reports toward a processing center which is called “sink.” The design of protocols and applications for such networks has to be energy aware in order to prolong the lifetime of the network because the replacement of the embedded batteries is a very difficult process once these nodes have been deployed. In Wireless Sensor Network [9], the energy efficiency [7] [8] is the key issue for designing the protocol because sensor nodes have one-time battery backup. There are many modern protocols which extend the lifetime [6] of the wireless sensor network by efficiently using battery power of the sensor node [2]. SEP (Stable Election Protocol) SEP protocol is an improvement and enhancement of LEACH [2] protocol which uses clustering based routing strategy based on the node heterogeneity of the sensor node in the networks. In this protocol and technique, some of the sensor nodes have the high energy they are referred to as the advanced nodes and the probability of the advanced nodes to become CHS is more as compared to the normal nodes and the normal nodes have lower energy as compared to the advanced nodes in the network. SEP strategy uses a distributed method to select a CH in WSNs. It is heterogeneity-aware protocol [1] and CH selection probabilities of nodes