© 2019, IJCSE All Rights Reserved 312 International Journal of Computer Sciences and Engineering Open Access Research Paper Vol.-7, Issue-7, July 2019 E-ISSN: 2347-2693 Performance Analysis of Congestion Control In MANET Using Different Routing Protocols Bhawna Ahlawat 1* , Vikas Nandal 2 1,2 ECE, UIET, MDU Rohtak Corresponding author: bhawna1996ahlawat@gmail.com DOI: https://doi.org/10.26438/ijcse/v7i7.312319 | Available online at: www.ijcseonline.org Accepted: 16/Jul/2019, Published: 31/Jul/2019 Abstract- Mobile Ad hoc Network (MANET) is an infrastructure free network that is self-configurable and is dynamic in nature. In MANET nodes communicate with each other independently since there is no centralised controller. An extensive variety of routing protocols for MANETs have been suggested by researchers to excel the restrictions of wired routing protocols. Congestion in MANET is a restriction in the implementation of MANET as it can affect the efficiency of the network and may lead to packets loss, increased average delay during transmission or reception of data. This paper discusses various routing protocols to control congestion problem in MANET. Also various performance parameters have been evaluated here like packets transmitted, packets collided, packets that got into error, throughput and average delay by using AODV (Ad- Hoc On Demand Distance Vector), DSR (Dynamic Source Routing) and ZRP (Zone Routing Protocol) protocols by taking 5,10 and 20 nodes using the software NETSIM Simulator. Keywords- MANET, ZRP, AODV, DSR I. INTRODUCTION TO MANET MANET is group of mobile hosts that is self-maintainable, self-configurable and is self- organised in nature [1]. There is no centralised controller in MANET to work upon and here mobile nodes communicate with each other independently. MANET is being used in multiple domains because it is inexpensive and has infrastructure less network [2]. MANETs have mobile nodes that can enter and exit the network in between the operations as considered by the network [3]. Mobility related with wireless nodes in MANET make it more useful for defence applications [4]. Since the Network is self organised, the probability of an attack by invader is high who wish to seek unapproved access and deface data on communication channel. The packet must extend to destination without interference like delay, packet loss, so transmission of data from source to destination is a daring task in MANET [5]. Congestion is a leading problem in MANET which leads to wastage of resources as congestion increases the transmission delay and error while transmitting the packets from source to destination end [6]. Congestion occur when demand is much more than the present available resources that is when the load in network is more than its capacity which can it handle [7]. Manet’s nodes may be Personal Devices as cell phones, laptops etc [8]. MANETs are convenient in those environments where the infrastructure is not available or cannot be deployed. Congestion occurs in the network due to many reasons like when traffic rate at input side is greater than the capacity of line at the output, also due to slow processors and sometimes due to sluggish nature of links. So Congestion control is a technique or process that can either avert congestion before it happens or abolish it after it has occurred [9]. Manet provides communication facility by making communication possible in faraway places where establishing an infrastructure network is a demanding work. Also presence of restricted resources and mobility of nodes surfaces many problems like power control, security, topology control, routing, and congestion control which need a high level of research to be done [10] .