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Wireless links in a Mobile Ad Hoc Network (MANET) is unreliable. So the links in between the nodes in a MANET breaks frequently. Mobility of nodes in a MANET increases the level of unreliability of the link between the nodes. Failure of a link also leads to complete route failure and affect the performance of MANET. So, there is a need to study the effect of mobility of nodes that causes a link break...
Mobile ad hoc networks (MANET) are collections of self-organizing mobile nodes with dynamic topologies and have no fixed infrastructure. MANET do not have centralized administration, here nodes act as both host as well as router and communicate by forwarding packets for each other in multi hop way, because of the fundamental characteristics like, the open medium, dynamic network topology, lack of...
Networking community is largely depending on simulation to evaluate the behavior and performance of protocols for networks. A network simulator is program models the behavior of a network, without an actual network being present. During the past years, varieties of network simulation tools have been developed in the field of communication. In this article, present a case study of implementation and...
Networking community is largely depending on simulation to evaluate the performance and behavior of protocols for networks. A network simulator is a program which models the behavior of a network without an actual network being present. Different network simulation tools have been developed during the past years in the field of communication. In this article, present a comparison and simulation study...
In this paper, we investigate the performance of OLSR and AODV protocols in a Manhattan grid scenario when sending triple TCP flow over FTP. We considered data rates of 0.1 Mbps and 1 Mbps. For the simulations, we used SUMO and NS3. We considered IEEE 802.11p standard and TwoRayGroundPropagationLossModel. We use through-put and cwnd as evaluation metrics. The simulation results show that for small...
There is an increasing interest in Mobile Ad hoc Networks (MANETs) for their potential use in several fields such as collaborative computing, tactical networks and multimedia communications. Thus, MANETs need to support multiple communication flows in the network, while guaranteeing a good performance. In this paper, we analyze the performance of a MANET by simulations, considering multiple flows...
As Mobile Ad hoc Networks (MANETs) are attracting attention for their potential use in several fields such as collaborative computing and multimedia communications, there is an increasing need to minimize the overhead introduced by routing protocols in the network. In this paper, we analyze the performance of a MANET by simulations, in terms of RREQ, RREP and RERR, considering Random Waypoint Mobility...
MANETs are temporary networks, that spend less time to be deployed and less resources to keep up and running. MANETs can be implemented in disaster recovery sites, university campuses, military campaigns and so on. MANET nodes cooperate in an autonomous way by forwarding packets to each-other. Considering mobility of the terminals, the routes change dynamically so routing algorithms are very important...
Due to recent advances in mobile wireless communication and computing technologies, Mobile Ad hoc Networks (MANETs) have become the network of choice for use in various applications. But this advantage comes with serious security concerns, in particular from a wireless transmission medium perspective where such networks may be subject to data tampering and dropping attacks. This paper enhances a recently...
In this paper, we investigated the performance of some routing protocols for Ad-Hoc Networks under CBR and TCP traffic source. The behaviors of TCP still have not well understood in the multi-hop wireless networks. Through this paper we are able to find that how TCP will react under different network conditions. In this traffic and mobility scenarios play an important role in evaluating the performance...
Wireless networks have become increasingly popular. They can provide mobile users with ubiquitous communication capability and information access regardless of locations. In this paper, we evaluate the heterogeneous environments of wireless mobile ad-hoc networks by simulations. For simulations, we used ns-3 network simulator considering Ad hoc On demand Distance Vector (AODV) and Optimized Link State...
With the rapid development of mobile ad hoc network, security and trust are important to the network, especially for military ad hoc network. Trust routing scheme is the main issue in military ad hoc network. Trust routing is related to many factors such as routing hop number, node information integrity degree and node behavior. To use multi-source information, multi-agent collaboration method is...
Topology change is the main factor that affects the network life time of Wireless Sensor Network (WSN) applications. In static WSN, the topology change is often caused by node failure which is due to energy depletion. However, in the Mobile WSN (MWSN), the main reason of the topology change is caused by the node movement. Since the mobile sensor nodes are limited in power supply and have a low radio...
This paper considers the impact of unidirectional link on Ad-hoc on-demand distance vector routing protocol from a mobility perspective. Most routing protocols assume that all wireless connectivity is symmetrical and bidirectional. Such assumptions are not generally true. Wireless nodes exhibit non-uniform transmission power, non-uniform reception quality and signal to noise ratio which may result...
In this paper, we proposed a long-life, shortest path routing method for interval-vehicle communication. Firstly, we form the inter-vehicle network into the layered network to construct the shortest path. Next, we deduce the link with maximal lifetime between two directly linked vehicles according to their velocities and moving directions. Furthermore, the lifetime of one hop neighbors is propagated...
This paper analyses the two common routing protocols, AODV and DSR in Ad-Hoc network. On the OPNET network simulation platform, a systematically simulation and research has been carried out on the performance of two routing protocols, and how the network environments impact on the performance of routing protocol. The packet delivery ratio and average delay of these two indicators have been selected...
Mobile ad hoc networks (MANETs) have been gaining tremendous attention owing to the advances in wireless technologies accompanied by many applications and implementations. However, there are still a number of issues in MANETs which require further investigations and efficient solutions. Out of these issues, broadcasting in MANETs has been a major problem for both industry and the research community...
Today wireless networks are becoming popular because of their “3 Any's”- Any person, Any where, Any time. Mobile ad-hoc networks (MANETs) is an emerging research area with practical application. Dynamic and reliable protocols are required in MANETs, as they have no infrastructure (base stations) and their Network topology changes frequently. There are different protocols for handling the routing problem...
There are many multipath extensions to AODV (Ad Hoc on-demand Distance Vector) routing protocol in MANETs. These extensions can be categorized into two types based on the concept of utilizing multiple paths in intermediate nodes. The first type utilizes Multiple paths in Intermediate nodes in AODV protocol(MIAODV), and the other utilizes multiple paths only at source and destination nodes (in this...
The aim of this paper is to present a novel multipath routing approach in MANETs as new extensions to AODV, a well-known traditional reactive routing protocol. The approach is called Threshold efficient Routes in multipath AODV (TRAODV) which is a link-disjoint multipath extension that tries to optimise routing delay overhead in the route discovery process of traditional AODV. The optimisation in...
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