International Journal of Electrical and Computer Engineering (IJECE) Vol. 7, No. 1, February 2017, pp. 479~485 ISSN: 2088-8708, DOI: 10.11591/ijece.v7i1.pp479-485  479 Journal homepage: http://iaesjournal.com/online/index.php/IJECE Reliability Evaluation and Analysis of Mobile Ad Hoc Networks Deepak Kumar Panda 1 , Ranjan Kumar Dash 2 , 1 SOA University, Bhubaneswar, India 2 College of Engineering and Technology, Bhubaneswar, India Article Info ABSTRACT Article history: Received Aug 21, 2016 Revised Oct 21, 2016 Accepted Nov 5, 2016 The paper addresses the reliability problem of mobile ad hoc networks under link and node failure model. Node reliability is calculated as a function of no. of neighbor nodes, packet success rate, and device type and packet size. The presence of a link between any node pair is binary and its reliability is computed considering the distance between nodes and signal-to-noise ratio (SNR). An efficient algorithm is proposed to analyze and calculate the reliability of mobile ad hoc networks considering multiple routes from source and destination nodes. The effect of different parameters on node reliability and link reliability are analyzed and discussed. The network is simulated and analyzed using INET frame work. Reliability of two distinct cases of this simulation is evaluated. The simulated results and discussions ensure that evaluation of the reliability of any mobile ad hoc networks can be done easily and in an efficient manner by the proposed method. Keyword: Mobility of mobile nodes Reliability Routing Signal to noise ratio(SNR) Copyright © 2017 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Deepak Kumar Panda, SOA University, Bhubaneswar, India-751030. Email: deepak_panda_2000@yahoo.com 1. INTRODUCTION A mobile ad hoc network is consists of a set of mobile nodes operating in an infrastructure less network with a centralized administration. Communication is made by establishing wireless links among mobile nodes through their antennas. In a single-hop scenario, a mobile node is not be able to communicate directly with other node due to limited radio power utilization of channel. Under such situations, communication is made possible by a multi-hop scenario, in which the source node communicates to the sink node by sending packets that must be relayed by several intermediate hosts [1]. The MANET is a infrastructure less wireless network. These networks have no fixed routers. Every node could be act as a router. The responsibilities for organizing and controlling the network are handled by the nodes themselves. The whole network is mobile, and due to mobility of the nodes the individual terminals are allowed to move freely [2-4]. Mobile Ad-hoc Networks are used for disaster management, communications during war, catastrophic failure and rescue operations when the infrastructure based network is not available [5-7]. It can provide a possible means for communications and information contact. Extensive works have been carried out in evaluating and analyzing of reliability of wired networks [8-10]. Nevertheless, the works carried out for evaluating reliability of MANET are very limited [11-18]. Chen &Lyu [14] inspected the problem of two terminal reliability in wireless networks resembled by Common Object Request Broker Architectures (CORBA) specifications. Chen & Lyu also suggested a new reliability term i.e. the end-to-end expected instantaneous reliability (EIR) for accommodating the hand-over processes and alternative communication structures in wireless CORBA specifications. However, they presumed that only nodes are vulnerable to failures whereas links are fault- free. Two algorithm were suggested by Abo El Fotoh et al. [15] i.e. one for computing the two-terminal reliability and the other for computing the probable and the maximum message delay between sensors and the data sink in an operational distributed sensor networks (DSN). In aforesaid work, failures of stationary