International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
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A Review on Congestion Control using AODV and Enhance AODV Shweta Kadam1, Sameer Nagtilak2 1M.E.
Student, Department of Electronics &Tele-Communication Engineering, K.I.T’s College of Engineering, Gokul Shirgaon, Kolhapur, Maharashtra, 416234, India. 2Assistant Professor, Department of Electronics Engineering, K.I.T’s College of Engineering, Kolhapur, Maharashtra, 416234, India. ---------------------------------------------------------------------***------------------------------------------------------------------
Abstract – Ad-hoc network is defined as the temporary
mobility, link failures, interferences, etc., but among this congestion is at the top of the list. If their is no any appropriate congestion control strategy, then it will lead to a collapse of network due to congestion, and so data is not successfully delivered [4].Their are various congestion control algorithms such as EDAODV,AODV-I,CRP. This paper focuses on AODV and EAODV.
networks were nodes are moving without any fixed infrastructure or centralized administration. Here every node acts as both router as well as host. The topologies of these nodes dynamic, self-configurable and highly deployable. There are so many routing protocols which are defined for MANETs. As so many packets are transmitted by various nodes over the network, the chances of loosing the packets over the network increases over great extent. When the offered load on the network exceeds congestion occurs, which leads to packet losses. There are so many proposed protocols that are adaptive to congestion and deals with congestion. This paper discusses the congestion control protocols, AODV and Enhance AODV. Enhance AODV is modified version of basic AODV routing protocol which controls congestion very effectively than AODV routing protocol. The performance parameters such as packet delivery ratio, packet loss ratio, average end to end delay and throughput are discussed.
The rest of the paper is organized as follows. In Section 2, Congestion in MANET is described. Section 3 describes working of AODV. Enhance AODV(EAODV) protocol are illustrated in section 4. Section 5 demonstrates the overview of related work about topic. Section 6 concludes the paper.
2. Congestion in MANET’s Mobile ad-hoc network is network of mobile device which is free to move independently in any direction. Congestion is an obstruction where successful communication do not takes place. It is situation where, in a subnet too many packets are present [8]. Which leads to high overhead, packet losses, waste energy and long delays. The following difficulties can be created because of congestion.
Key Words: MANET; AODV; Enhance AODV (EAODV); Congestion control.
1. INTRODUCTION Ad-hoc Network is nothing but the collection of two or more wireless devices which are having the capability of communicating with each other by taking no help of any centralized administrator. Generally these networks are referred to as MANETs (Mobile Ad-hoc Networks) [1]. MANETs consists of numbers of nodes which moves freely within the network. Each node acts not only as a terminal but also as a router. If mobile nodes are within each other’s radio range they can communicate with each other via wireless link and if not, they depend on other neighbouring nodes which act as routers to transmit packets [2]. Due to independent behaviour of MANET's, there are a number of issues and challenges in designing of MANET networks. The issues include security, topology control, quality of service, routing, power management, congestion control etc [8].The key issue in wireless networks is congestion in network.
High overhead: The discovery of new routes for processing and communication is taken into account. It needs additional effort for maintaining the multipath regardless of the existence of alternate route if the use of multipath routing is done.
Many packet losses : Packet losses are due to congestion. To minimize the excess load in the network the sending rate should be reduced at the sender side or by dropping the packets at the intermediate nodes or by applying both the processes which increases packet loss rate or minimum throughput.
Long delay : The congestion is detected in this process. It is better to select the alternate new path when the congestion is more undesirable.
In this paper we have discussed AODV and EAODV to control network congestion.
Congestion is the condition when the offered load to the network exceeds the available resources. It can take place during the transferring of packets from source to destination which leads to packet loss. Their are also some other factors which are responsible for packet loss, such as
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