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A MANET or Mobile Ad-Hoc Network is decentralized in nature and it is basically a collection of heterogeneous mobile nodes which are autonomous and can communicate among themselves over the wireless link. In this infrastructure-less network, all the nodes dynamically route the packets by themselves with help of some protocols for sending or receiving the packet information. The ZRP or Zone Routing...
Stream Control Transmission Protocol (SCTP) is one of the TCP/IP protocol stack transport protocol. In this paper we aim for improving the video transmission rates by significantly enhancing the SCTP protocol frame structures. We make use of SCTP multi-streaming feature for determining various frame formats that defines the effective transmission. The proposed unidirectional delay technique is used...
The multi-copy routing paradigm in Delay Tolerant Networks (DTNs) implies that increasing contact bandwidth leads to a decrease in data delivery delay and an improvement in throughput. With Hybrid Radio Frequency/Free Space Optical (RF/FSO) PHY layers, the high data rate FSO links can be used to increase the contact bandwidth. However, due to the highly directional nature of FSO links, broadcasting...
In disaster affected regions, communication and coordination among different authorities like volunteers, army and government personals are extremely important for smooth rescue operations. A major problem faced by the rescue workers during post disaster scenario is the frequent communication disruption from the conventional networks (like cellular), and therefore information collection and coordination...
In Ad Hoc technology, a mobile node is characterized by a limited battery power. Therefore, the energy consumption becomes an important challenge that must be taken into account when designing a new Ad Hoc routing protocol. An efficient routing protocol should also consider a high level of Quality of Service (QoS) such as the end-to-end delay and the bandwidth as the applications do not have the same...
Reliable social connectivity and transmission of data for popular nodes is vital in multihop ad-hoc social networks (ASNETs). In this networking paradigm, transmission unreliability could be caused by multiple social applications running on a single node. This leads to contentions among nodes and connection paths. In addition, congestion can be the result of multiple senders transmitting data to a...
Recent studies suggest nodes in practical networks are more likely to communicate with nearby nodes than far away nodes, which is referred to as proximity preference. In this paper, we model proximity preference by assuming the probability of communication follows a power law distribution with respect to distance and analyze its influence on the throughput of a hybrid network. Moreover, L-maximum-hop...
Delay Tolerant Networks (DTNs) are sparse mobile ad-hoc networks in which there is typically no complete path between the source and destination. To increase the reliability of message delivery, multi-copy routing is often used at the expense of high buffer and bandwidth overhead. While much work has been done in the design of forwarding algorithms, little work has focused on studying forwarding under...
Broadcasting is the primary procedure employed in Mobile ad hoc network for different kinds of functions like sending data and route discovery. Simple flooding is the direct method for broadcasting which can degrade the network performance. To resolve the broadcast storm issue which potentially leads to contention, collision and replicated messages, recently a new probabilistic approach has been proposed...
The communication quality in multi-hop networks entirely depends on the selection of a multi-hop path from source to destination among the potential candidate paths. Finding a path with good throughput in multi hop MANETS (Mobile Ad Hoc Networks) is a critical job of QoS routing. Existing approaches finds the optimal path based on the best data rates among all links. However, other measures such as...
In Free Space Optical Mobile Ad Hoc Networks, there are only limited literature works on routing methodologies and these routing techniques lack the consideration of QoS metrics. In order to overcome these issues, in this paper, we propose QoS based directionality routing in FSO MANETs. When the source wants to transmit the data packet to destination, directional routing technique is utilized for...
Bandwidth-delay product (BDP) is an important indicator of the network capacity and usually used to measure the quality of a connection. In wireless ad hoc networks over IEEE 802.11, packets may be blocked due to link layer contention, and delay triggered by the contention called contention delay has been revealed has nothing to do with BDP. BDP in wireless ad hoc networks has been studied a lot to...
Mobile Ad Hoc Networks (MANETs) also called mesh networks, consist of a large number of mobile nodes that communicate with each other in the absence of any fixed infrastructure or centralized administration. The principle characteristics of MANET are the dynamic topology and the limited battery power of mobile nodes. The discharge of the battery causes many problems such as the loss of the packets...
Wireless ad-hoc networks are collections of wireless nodes having no predefined infrastructure. Most of the existing routing protocols for wireless ad-hoc networks use the shortest path or minimum distance path to the destination. However, the shortest path routing does not provide a good balance of the traffic load among all nodes. When many users utilize the shortest paths, some nodes become highly...
Ad-hoc networks generally play a vital role in emerging technologies. The limited communication and computation resources, the unguaranteed connectivity to trusted authorities make known security solutions for wired networks. A novel Tiered Authentication scheme for Multicast traffic (TAM) has large scale of ad-hoc networks. Nodes are grouped into the cluster. Cross-cluster multicast traffic includes...
Mobile ad hoc network is one of most important research topics as they are infrastructure-less and mobile. Open medium, wide distribution and de-centralization of nodes makes MANETs vulnerable and malicious. It is crucial to develop efficient intrusion detection system to protect MANETs. A new intrusion detection system named bandwidth shared acknowledgment (BSA) in which all transmission packet data...
The last few years have witnessed an increase in energy consumption in Information and Communication Technology (ICT). Naturally, energy efficient solutions are becoming crucial for both local and wireless access networks. In this paper, we propose a new framework to support energy efficient management in Wireless Mesh Networks (WMNs). A key distinguishing feature of our solution is its online flow-based...
Cognitive radio technology can be used to solve the problems of limited available spectrum and inefficient spectrum usage by adaptively changing transmission parameters. By utilizing CR technology for dynamic and distributed multi-hop networks, cognitive radio ad hoc networks can efficiently utilize free wireless resources. However, the routing protocols for cognitive radio CSMA/CA ad hoc networks...
Vehicular Ad Hoc Networks (VANETs) offer great prospects for the future intelligent transportation system (ITS), which are receiving much attention thanks to the wide variety of services they can provide a lot of work and research around the globe is being conducted to define the standards for VANETs, which depend on the vehicles themselves to provide network functionality rather than the traditional...
Directional antenna provides tremendous performance improvement in an ad hoc network. There are many applications such as multimedia and real time, which requires guaranteed QoS (quality of service) in the network. In this paper, we present QoS routing algorithm which finds a optimal path from source to destination as well as for other nodes in the network. Route discovery is initiated by source node...
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