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Based on the analysis of the existing utility-based forwarding mechanisms, for the inefficient forwarding of history encounter time based forwarding mechanism in the initial phase of the node movement, a Random and Encounter Time Based algorithm named RET is proposed in this paper. RET divides the nodes moving into two phases-random forwarding phase (initial phase) and utility-based forwarding phase...
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...
In order to achieve the best performance of a Wireless Sensor Network (WSN), it is a must to provide a challengeable routing algorithm , which consumes less power and allows more data collection. In this paper we have considered a WSN with mobile sinks and it is considered that the router follows the basic location update algorithm with traffic awareness. We show the performances of a router under...
This paper presents a new data transmission protocol in Delay Tolerant Mobile Wireless Sensor Networks, which divides the data transmission process into two phases: data reception phase and data forwarding phase, mainly fulfilling through analyzing the state of mobile nodes and using Hand up mechanism. Simulation result shows that, through the implementation of two phases, we can obtain a higher message...
In this study we propose two novel ABR extended Long Life Routing Methods called Alternative enhancement for Enhanced Associativity Based Routing (AEABR) and Associativity Tick Averaged ABR (ATAABR) methods which are also modifications of Associativity Based Routing (ABR). Comparison of these associativity based long Life routing algorithms in Mobile Networks are done for route speeds, life times...
In wireless sensor networks, with respect to a desired time deadline real-time data dissemination schemes achieve that by a spatiotemporal communication approach forwarding data from a source to a destination with a delivery speed. The delivery speed is typically obtained from both the static distance from the source to the destination and the interval of the time deadline. However, in case of real-time...
Mobile sink brings new challenges to densely deployed and large wireless sensor networks (WSNs). When the sink moves, frequent location updates from the sink can generate excessive power consumption of sensors. In this paper, we propose IAR, an Intelligent Agent-based Routing protocol that provides efficient data delivery to mobile sink. Proposed algorithm reduces signal overhead and improve degraded...
In wireless sensor networks with holes(obstacles), to identify holes and deliver data packets efficiently are challenging issues. Most existing researches require sensor nodes to exchange messages multiple times for hole identification and thus depleting energy of sensors. In some researches, even with the assumption of knowing the information of the hole, due to the lack of efficient hole bypassing...
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...
The recent proliferation of wireless devices extends the scope of mobile ad hoc networks (MANETs) applications beyond the military domain to include civil and commercial application scenarios. Since MANETs are composed of mobile terminals with limited resources, MANET security remains an unsolved and motivating challenge. Due to advantageous like in-frastructureless and spontaneous deployments, MANETs...
Quality-based routing protocols are proposed to restrict message flooding within only high quality nodes in delay tolerant networks (DTNs). However, different quality threshold mechanisms have diverse impact on the network and we investigate this issue in the paper. Through theoretical analysis we show that heterogeneous threshold mechanism suffers a severe nodal cost imbalance problem. Furthermore,...
Data dissemination and discovery is critical for ad-hoc wireless sensor networks. Most existing research depends on location information that is not always obtained easily, efficiently and accurately. We propose the concept of Contour-cast, a location-free data dissemination and discovery approach for large-scale wireless sensor networks. One important property of Contour-cast is that it does not...
Mobile ad-hoc network (MANET) is a multihop wireless network formed by a collection of mobile nodes wherein the nodes move arbitrarily thus making the topology dynamic. MANETs have low bandwidth wireless links hence the routing protocols with less consumption of bandwidth are of great importance. This paper presents a new location aware hybrid routing algorithm with reduced diffusion of routing related...
Wireless ad hoc networks are a collection of mobile nodes spreading over a defined geographical area, enabling realtime collaborative applications such as push-to-talk and VoIP. Unfortunately, wireless ad hoc networks suffer from limited bandwidth and QoS constraints. A proposed eXplicit MultiCAST (XCAST) based routing protocol (P-XCAST) is presented in this paper to support team-based communications...
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).
A Mobile Ad Hoc Network (MANET) is a wireless network which provides communication among wireless mobile hosts without the need of any pre-established infrastructure or centralized control. In such environments, organizing mobile nodes into manageable groups called clusters can reduce the routing overhead and provide better coordination among the nodes. When the nodes mobility is high, re-clustering...
Mobile ad hoc network (MANET) is self-organizing, infrastructureless, multi-hop network. The wireless and distributed nature of MANETs and the very bad security environment in battlefield bring a great challenge to securing tactical mobile ad hoc networks. Most schemes proposed recently focus on specific security areas, such as establishing trust infrastructure, securing routing protocols, or intrusion...
Routing is a challenging task in mobile adhoc network due to nodal mobility, unstable links and limited resources. Swarm intelligence, as demonstrated by biological swarm, such as ant colony has found to be a attractive technique for routing in MANET. However existing swarm intelligence based routing protocols find an optimal path by considering only one or two route selection metrics, such as hop...
IEEE 802.11 proposed a number of standards and each one had a specific goal. They can be configured in infrastructure mode or ad hoc mode. In the study of infrastructure mode, the focus was on 802.11 b/g co-existence along with other single mode operations to analyze the throughput and traffic drop through simulation. In the study of ad hoc mode, the focus was to analyze the behavior of ad hoc networks...
Nowadays, the requirement of Internet is increasing in more and more heterogeneous scenarios; especially in mobile platforms, such as Planes, trains and buses. NEMOWG (network mobility workging group) a new working group in IETF (Internet Engineering Task Force) is formed to provide mechanisms to manage the mobility of a network as a whole, enabling that network to change its point of attachment to...
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