International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Congestion Control Technique with Safety Transmission of Messages in Vehicular Ad Hoc Network Bhagyashri P. Deshpande1, Dr.A.S.Alvi 2 1 2
M.E(CSE) PRMIT&R, Badnera , Amravati
Professor ,Dept. of CSE PRMIT&R ,Badnera, Amravati
---------------------------------------------------------------------***--------------------------------------------------------------------to improve the road safety and traffic efficiency in the Abstract - Vehicular Ad hoc Network (VANET) is somehow vehicular environments. Due to the dynamic nature of similar to MANET. As there are mobile nodes present in MANET in the same way vehicles are present in VANET. If we the traffic in roads, some gaps may be created between compare it with MANET, VANET have dissimilar the vehicles and consequently remote node clusters characteristics. When the channels are saturated by the nodes, can be created in the roads and it leads to accidents. the congestion occurs in channel. Chances of congestion in the To avoid this problem the warning messages network increases with the increment in number of collision must be sent to the vehicles for avoiding further occurrence and this is all because of increase in the density of collision. We have to study the probability of sent vehicle. In this paper we propose RT-MMF algorithm to control messages from vehicles and the received safety the congestion in VANET and to deliver safety messages messages and also the delay that will occur in sending through nodes, encryption and decryption technique is used. the message for future recipient. We are also going to learn the performance of the proposed In high mobility environment DSRC[3] will not algorithm. We are evaluating the result of our proposed method through simulation using NS2. In this paper we are worked properly. Therefore, a new Relaxation Max-Min also comparing previous technique with our proposed method. Fairness algorithm (RT-MMF)[4] is introduced to increase the system’s reliability and probability of Key Words: VANET, MANET, Congestion Control, RTreceiving packets and decreasing the delay for MMF, Network Simulator. transmission. In rest of the paper we will see related work, the comparison between the previous technique 1.INTRODUCTION and the proposed one, evaluation of proposed system. Vehicular Ad hoc Networks (VANET’s) uses Intelligent Transport Systems (ITSs) to operate wireless communications in the vehicular environments. VANET’s are designed to provide consistent and safe surroundings for users to reduce the road accidents, traffic jams, and fuel consumptions, and so on. The VANets’ users can be informed of hazardous situations by vehicular communications and exchanging the information about surrounding environments. VANET’s have some unique characteristics such as high mobility, high rate of topology changes, and high density of the network, and so on. IEEE 802.11p[1] is a protocol that specifies the features of IEEE 802.11 protocol in PHY and lower part of MAC layers to transfer data in vehicular environments. This protocol employs an MAC layer protocol based on Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) for disseminating data in VANET. Vehicular communication includes both InterVehicle Communication (IVC) and Vehicle to Infrastructure communication. VANET’s are designed © 2017, IRJET
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2. RELATED WORK Varsha H,, Pradeep , (IJCSIT) International Journal of Computer Science and Information Technologies, Vol. 5 (2) , 2014, [1] In this paper, performance evaluations of safety message dissemination in VANETs in Vehicleto-Vehicle communication (V2V) are considered. The vehicles which are considered as nodes in VANET communicate or exchange messages with each other, which is referred to as V2V or Inter-Vehicle Communication (IVC). V2V communication is implemented through Dedicated Short Range Communication (DSRC)[3] protocol. The main advantage of the V2V communication with DSRC will be decreased delay and efficient broadcasting of safety messages to far away nodes as possible. Meenal Pannase January 2014 [2] In this paper we suggest priority based congestion control algorithm as answer to avert congestion in VANETs natural environment. We also study the production of proposed priority based congestion control algorithm for VANET in difference congested scenarios. The ISO 9001:2008 Certified Journal
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