AODV routing protocol modification with dqueue(dqAODV) for VANET in city scenarios

AODV modification to address link breakage issue: A review

Abstract: An ad hoc network is a network that is composed of individual devices communicating with each other directly. It does not rely on a base station to coordinate the flow of messages to each node in the network, the individual network nodes forward packets to and from each other. As nodes can unreservedly freely in the network, ad-hoc network has the characteristic of dynamic topology. Due to this, link breakage happens frequently. To address this issue, various modifications have been done in the mostly used routing protocol, AODV. This paper explores some of the modified AODV routing protocol.

A Cluster Based Enhancement to AODV for Inter-Vehicular Communication in VANET

Abstract: Vehicular Ad-hoc Networks (VANET) are a special kind of Mobile Ad-hoc network (MANET), in which vehicles on the road forms the nodes of the networks. Now a days, VANETs find several applications as an Intelligent Transportation System(ITS). Dynamic network architectures and node movement characteristics differentiates VANETs from other kinds of ad hoc networks. The dynamic change in topology shortens the effective time of routing. Hence routing in VANETs is complicated. Ad-hoc On-Demand Distance Vector (AODV) routing protocol is the most commonly used topology based routing protocol for VANET. During the route discovery process AODV broadcasts route request message (RREQ). It creates many unused routes between a source and a destination node. This paper aims at improving the performance of AODV by enhancing the existing protocol by creating stable clusters and performing routing by Cluster Heads and Gateway nodes.

Optimized AODV routing protocol for Vehicular Ad hoc Networks

Abstract: The paper presents the Vehicular Ad hoc Networks and the typical routing protocol: the ad hoc on-demand routing protocol (AODV) in mobile ad hoc networks and the optimized protocol AODV_OBD for protocol AODV; also presents a practical mobility model that enable the simulation experiment more veritable. Then it use network simulation tool(ns2) to simulate the two routing protocols in ad hoc networks based on Linux and then compares and analyses the simulation results and do performance evolution. We can infer that AODV_OBD routing protocol induces the packet delay to a certain extent compared with AODV routing protocol.

Performance Evaluation of Proactive and Reactive Protocols in VANET

Abstract:   Abstract—VANET (Vehicular adhoc network) research field is growing very fast. It has to serves a wide range of applications under different scenario (City, Highway). It has various challenges to adopt the protocols that can serve in different topology and scenario. This paper presents a comparative study of the adhoc routing protocols. The main objective of Vehicular adhoc networks is to build a robust network among mobile vehicles so that vehicles can talk to each other for the safety of human beings. VANET hits the protocol's strength due to its highly dynamic features. Thus in testing a protocol suitable for VANET implementation, we have selected different routing protocols. In this paper, an attempt has been made to compare four well-known protocols AODV, DSR, OLSR and DSDV by using three performance metrics packet delivery ratio, average end to end delay and routing overhead. The comparison has been done by using simulation tool NS2 which is the main simulator, Network animator (NAM) and excel graph which is used for preparing the graphs from the trace files.

Modified route-maintenance in AODV Routing protocol using static nodes in realistic mobility model

Abstract: One of the popular wireless network architectures is Mobile Ad Hoc Network (MANET). It can be easily deployed in every environment, without any underlying backbone and infrastructure support. MANET is a wireless network that consists of nodes which are mobile in nature. Each node in the network acts as a router which provides the flexibility to the topology of the network. In this paper, an extended AODV routing protocol is proposed for Ad-hoc networks which typically suits to resolve the realistic model problems. This proposed protocol may improve the performance of regular AODV routing protocol. It has all the features of AODV routing protocol, as it follows all the steps of the route discovery algorithm of AODV routing protocol. The main difference arises when it comes to the route maintenance approach. We assume that the network is also consist of the static nodes, which helps to recover the path while route maintenance. An assumption reveals that it may increase the efficiency of regular AODV routing protocol in terms of the metrics: End-to-end delay, Packets dropped, Routing overhead.