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In the MANET with high mobility, many routing responses of the contiguous nodes in the DSR routing protocol can not arrive to the resource nodes. So the routing requests which broadcast to these nodes produce much unnecessary use. We can acquire relatively steady routing responses if we chose the contiguous nodes to start the routing require which with less mobility compare with resource nodes. This...
Mobile Ad Hoc Networks (MANETs) use many different routing protocols to route data packets between nodes. These routing protocols are designed taking for granted that all nodes are cooperative and willing to forward control and data packets from and to other nodes. However, when selfish nodes exist in the network, the network performance may degrade significantly. In previous research, selfish nodes...
A MANET is an autonomous group of mobile users that communicate over reasonably slow wireless links. The network topology may vary rapidly and unpredictably over time, because the nodes are mobile. Routing is a significant issue and challenge in ad hoc networks and many routing protocols have been proposed like OLSR, AODV, AOMDV, DSDV, DSR, ZRP, GZRP and TORA, LAR so far to improve the routing performance...
Owing to their broad applications and huge potentials, Underwater Acoustic Networks (UAN) have drawn growing interests from researchers of science, industry and government. The complex underwater environment and unique acoustic channel lead to the difference between UAN and traditional RF Ad Hoc networks. This paper studies the performances of UAN based on Dynamic Source Routing (DSR) utilizing OPNET...
Wireless networks are continuing to attract attention for their potential use in several fields such as ad-hoc networks, sensor networks, mesh networks, and vehicular networks. Vehicular Ad-hoc networks (VANETs) are expected to be massively deployed in upcoming vehicles, because their use can improve the road safety and comfort. The effective implementation of vehicular communication could improve...
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...
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...
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...
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...
This paper focuses on performance investigation of reactive and proactive MANET routing protocols, namely AODV, DSR, TORA and OLSR. MANET is a type of Ad Hoc network, and here its functionality is based on 802.11 IEEE standards to communicate in a discrete and disperse environment with no central management. Hence, the main investigation done in this paper is of the discrete feature and routing in...
This paper investigates and undertakes simulation based study of adhoc routing protocols in wireless sensor networks. For our simulation based study we have considered three different scenarios where a adhoc routing protocol can be applied, namely a) Phenom nodes with mobility, Sensor nodes with mobility while the SINK node is stationary b) Phenom nodes with mobility, Sensor nodes are stationary and...
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