Proceedings of National Conference on Recent Advances in Electronics and Communication Engineering (RACE-2014), 28-29 March 2014 1 Average Localization Error Estimation of HiRLoc and SeRLoc Algorithm Anand Prakash 1 , Manish Singh 2 , Satyam Gupta 3 1,2,3 Department of Electronics and Communication Engineering 1 Invertis University Bareilly 2 Invertis university Bareilly 3 Invertis university Bareilly 1 Email- anand.anandprakash@gmail.com 2 Email- vickys0023@gmail.com 3 Email- Satyam9598@gmail.com Abstract- Wireless sensor networks (WSNs) consist of sensor nodes that broadcast a message within a network. Efficient broadcasting is a key requirement in sensor networks and has been a focal point of research over the last few years. There are many challenging tasks in the network, including redundancy control, average localization error, sensor node localization that decide the reliability of network. Efficient sensor node localization algorithm is a research highlight in the applications of wireless sensor networks (WSN). An event information with few node location information is meaningless in practical application so localization become a important point of concern. In this paper, we propose a comparative study of Localization algorithm SeRLoc and HiRLoc and have done a comparative study on average localization error, Execution time and number of sensor used between both algorithm. The comparison is done on using both directed and omni-directed antenna using WSN Localization Simulator. Keywords—Wireless Sensor Network, Architecture Of Wsns, Message Broadcasting, SiRLoc, HiRloc, I. INTRODUCTION Wireless sensor network is a collection of sensor nodes organized into a cooperative network[2]. Each sensor node consists of processing capability (one or more microcontroller, CPUs or DSP chips), may contain multiple types of memory ( program, data and flash memories), have a RF transceiver (either with a omni-directional or directional antenna), have a power source (batteries or solar cells), and accommodate various sensors and actuators. The node communicate wirelessly and often self-organized after being deployed in an ad hoc fashion. WSNs are an infrastructure comprised of sensing (measuring), computing, and communication element that give an administrator the ability to instrument, observe, and react to event and phenomena in a specified environment. Figure 1: General model of wireless sensor networks