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Mobile Ad Hoc Network consists of a large number of nodes. When we work with a large network with dense nodes, there are some nodes that have to bear the heavy traffic load, then over the time such nodes become weak and they start losing the packet. This packet loss is bearable up to some threshold value, but as the packet loss exceed this level, it disturb the whole network and now any kind of data...
Routing delivery is one of the key techniques in mobile ad hoc network, which involves many aspects such as topology update, routing exchange and so on. In this paper, we firstly apply routing tree to describe the complete topology of ad hoc network, and then store the information of routing tree into every node's routing table. Sparse routing tree, as a pruned tree, is used to exchange topology information,...
Mobile ad hoc networks are becoming an important concept of modern communication technologies and services. It provides some advantages to this communication world such as self-organizing and decentralization. In this paper, we are going to design a cluster-based multi source multicast routing protocol with new cluster head election, path construction and maintenance techniques. The main objective...
Security issues are paramount in wireless networks even more so than in wired networks. A particularly devastating attack in wireless networks is the wormhole attack, where two or more malicious colluding nodes create a higher level virtual tunnel in the network, which is employed to transport packets between the tunnel end points. These tunnels emulate shorter links in the network in which adversary...
In mobile ad hoc networks, the nodes are powered by batteries. So one of the most important merits when evaluating a given protocol is its ability to decrease node energy consumption and prolong network lifetime. Concerning this problem, an improved routing algorithm based on extreme prediction is presented for a mobile ad hoc network. It is an energy-saving and stable routing algorithm in which the...
Quality of Service (QoS) routing is known to be an NP-hard problem in case of two or more additive constraints and several exact algorithms and heuristics have been proposed to address this issue. In this work, we consider a particular two-Constrained Quality of Service Routing Problem where one constraint is superlative and the other is comparative. We consider the superlative constraint to represent...
Delay Tolerant Network (DTN) is evolved from Mobile Adhoc Network, MaNet. It is sparse and intermittently connected mobile adhoc network where reliable communication and end-to-end connectivity is not available for message transmission. The end to end connectivity is not ensured in Delay Tolerant Network. Only high latency applications are used in DTN. Latency may be in hours or days. The store and...
Even though Intrusion Detection Systems (IDS) are in wide-spread use, the question of how to efficiently initiate responses to detected attacks has been discussed far less often, especially in highly dynamic scenarios such as tactical MANETs. Despite being flexible and robust in their ability to self-organize, these MANETS are distinctly more susceptible to attacks than their wired counterparts. Especially...
A MANET is a set of mobile nodes connected by wireless link and are free to move dynamically and unpredictable in environment, but this dynamic nature of the network topology cause many challenges in MANET. Multicasting is an efficient way of providing necessary services for Ad hoc applications. Due to the dynamic nature of the network topology and restricted resources, finding and maintaining the...
This paper proposes a new position-based Routing protocol for Mobile Ad hoc networks, referred to as FORTEL. According to FORTEL, each node in the network maintains a location table that stores the location of all the other nodes. To discover a route to the destination, the source node relies on the location table to construct the destination's connectivity tree, which includes all the destination's...
Mobile ad-hoc networks are one of the most active research areas in the wireless communications field. These networks do not need any fixed infrastructure or configuration, easily adapting to difficult scenarios and types of use. Since mobile nodes are often powered by limited batteries, energy is an important issue in MANETs since the lack of a node can lead to the partitioning of the network. Recently,...
Wireless multihop ad hoc networks face a multitude of challenging problems including highly dynamic multihop topologies, lossy and noisy communication channels, and sporadic connectivity which contribute to frequent link failures. Rapid and accurate link failure detection is therefore important to maintain correct and optimum operation of network routing protocols. In this paper, we propose a unified...
Capacity of Mobile Ad Hoc Networks using a single channel and a single interface reduces due to channel interference and collision. Use of multiple non overlapping channels increases the network capacity by allowing more concurrent transmissions. A single interface together with multiple channels results in high switching delay. As a result multiple interfaces should be used to reduce the switching...
In this paper present performance comparison of AODV and OLSR for mobile ad hoc network. Though mobile ad hoc network (MANET) routing protocols have been extensively studied through simulation. We perform extensive simulations using NS-2 simulator. In particular, We look at average throughput as performance parameters while varying various network parameters such as number of nodes and pause time...
Congestion, the major reason for a link break is caused due to excessive load on the network, further leads to failure of nodes and topology change in the ad-hoc network. Transferring load of congested route to less congested routes improves overall network performance. Adhoc On-Demand Multipath Distance Vector (AOMDV) selects a path with a lower hop count and discards routes with higher hop count...
In this paper, we proposed bandwidth based power-aware routing protocol with signal strength detection instead of using GPS. In our proposed routing protocol, we used the variation of received signal strength to predict transmission bandwidth and lifetime of a link. Accordingly, the possible data transmission amount and remaining power after data transmission can be predicted. With the prediction...
Service discovery systems over MANETs are demanded to find available services at an appropriate cost, even if nodes in MANETs frequently move, randomly join or leave, and services may be revoked by their owners. SCN4M-DL is an adaptive directory-less service discovery system for MANETs, and it meets the above challenges by deeply coupling with underlying geographic routing algorithm and setting configurable...
In this paper, we propose and study how to provide multipath cross-layer service discovery (MCSD) for mobile ad hoc networks (MANETs). Cross-layer service discovery integrates service discovery into route discovery by taking advantage of network-layer topology information and routing message exchange. Multipath service discovery differs from multipath routing in that multipath service discovery can...
Mobile ad hoc networks do not have any fixed topology. Routing in such network is very challenging and difficult due to the mobility of the nodes. Ant colony optimization is an efficient optimization technique used to find the optimum shortest route in the adhoc network. This paper describes a new routing algorithm for MANETs using Ant Colony Optimization technique. Special attention has been given...
With the spread of mobile nodes, studies on MANET (Mobile Ad-hoc Network) that can build networks solely with mobile nodes are drawing much attention. However, most of the ad-hoc routing protocols have not considered the traffic conditions in the network. Thus, we propose an ad-hoc routing protocol that takes account of traffic conditions, by way of extending OLSR (Optimized Link State Routing).
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