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Due to high mobility of nodes, the major challenge of mobile ad hoc networks (MANETs) is the frequent link breakages which lead to numerous path failures and route discoveries. This paper introduces a novel signal strength based algorithm for RREQs forwarding (SAODV) to better exploit the neighbor coverage knowledge and hence reduce routing overhead in MANETs. The simulation results confirm the efficiency...
The Mobile Ad-hoc Network (MANET) is a volatile network, the nodes are in the movable state. The node can easily enter and exit from the network. The attacker node can easily enter into the network and affect the performance of the network. The malicious nodes are difficult to detect as any node can enter into the network easily. The detection of the malicious node is very important to secure and...
Trust Management Frameworks (TMFs) are being used to improve the efficiency, security, and reliability of decentralized and distributed autonomous MANETs using metrics garnered from the communications activities of nodes within the networks. However, these do not perform well in sparse / harsh environments such as those found in Underwater Acoustic Networks (UANs) [1]. As node capabilities increase,...
Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers, because of their potential use in several fields such as collaborative computing and communications. In this paper, we present the implementation of a testbed for WMNs using Raspbian OS. We analyze the performance of Optimized Link State Routing (OLSR) protocol in an indoor environment considering Transmission...
An incentive problem of ad hoc networks still remains for relaying frames from other nodes. By utilizing the Social Network System such as Twitter and Facebook, it is possible to estimate the degree of intimacy of friendship links not only to direct friends but also indirect friends such as friends-of-friends. If we provide links of ad-hoc network in relation to direct/indirect friends instead of...
This paper presents an analytical model for analyzing the performance of the TDMA-based distributed reservation protocol for wireless multi-hop ad hoc networks. A novel three-way handshake process is presented which considers the hold-off and competition process before the transmission of scheduling messages. An explicit expression of expectation of the average delay of the three-way handshake process...
To increase the throughput and performance of the next-generation wireless cellular network, this paper proposes two clustering algorithms for integrated cellular and ad hoc relaying systems. In this system, we consider that all the available users are divided into two groups: One is the super group which locates in the cell central region, and another is the regular group which locates in the cell...
Game-theory based carrier sense multiple access (CSMA) protocols for wireless networks have recently emerged as a competitive alternative to classical CSMA based medium access control designs. The advantage of game-theory based approaches lies in the scope of precise mathematical analysis and hence predictable performance compared to approaches based on ad-hoc arguments and heuristics. In this poster,...
Directional antennas have received much attention recently in multihop ad hoc networks, due to such benefits as increased transmission range, reduced co-channel interference, improved spatial reuse, and reduced susceptibility to jamming. However, existing random access scheduling schemes with directional antennas suffer from the issues of deafness and high probability of collisions. Moreover, such...
The two major concerns of the wireless communication system are throughput of the network and underutilization of wireless channels. Opportunistic routing (OR) aims at improving the former and coping with the latter. Due to the unreliable characteristics of such channels, traditional routing achieves poor throughput. Since traditional routing arbitrarily selects high lossy links among diverse paths...
This paper proposes a cognitive access of media with power control for unlicensed users through switching (CAMPUS), a scheme to overcome spectrum scarcity and to allow secondary users (SUs) to access a channel when coexisting with primary users (PUs). CAMPUS is a novel hybridization of interweave and underlay transmissions for spectrum access and management. Under this scheme, SUs sense the operating...
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...
Wireless Sensor Networks (WSNs) have generated a great interest for industrial and have enabled new applications in different domains. In this paper, we present a PHY/MAC/Network analytic model for asymmetric multihop WSNs using the unslotted IEEE802.15.4 protocol and a weighted fair queuing (WFQ) scheduling that models the forwarding capability of sensors. This model can be used for cross-layer optimization...
Mobile ad hoc network is wireless network that employ multi-hop radio relayed and are capable of achieving without the support of any fixed infrastructure. The cut of any central coordinator makes the routing more complex. All nodes of these networks behave as routers and take part in discovery and maintenance of routes to other nodes in the network. This characterstic presents a big challenge to...
A Mobile ad Hoc Network is a collection of nodes which is an infrastructure less network and hence can be easily established and deployed instantly. In addition to their normal operation, all the nodes in this kind of network act as routers as well. Because of the mobility and dynamic nature of the network, all the nodes are free to move randomly and hence topology of a MANET changes very frequently...
Cognitive Radio is a promising solution for the problem of spectrum under utilization. Cognitive Radio Network consists of licensed(Primary) and unlicensed (Secondary) users. Secondary users can occupy the licensed bands till the arrival of a primary user. Due to the features of cognitive radio network the TCP performance is greatly affected. In this project, intra-flow network coding and Dynamic...
Mobile Ad Hoc NETworks (MANETs) have become eminent resources for providing communication to military and other defence establishments operating in the conventional battlefield scenario in enemy territory or Counter Insurgency/Counter Terrorism operations beyond the reach of a permanent network infrastructure. However, MANET's inherent topology lack in defensive procedures and are thus, vulnerable...
The interconnection of distributed sensor nodes that is used to measure the sensor data in remote locations is called as Wireless Sensor Network (WSN). Each of the sensors is interfaced with a microcontroller to form wireless sensor node. Different types of devices like PDA'S, laptops, television etc., are used in consumer electronics that use different software and protocols. There is no common communication...
Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers, because of their potential use in several fields such as collaborative computing and communications. In this paper, we present the implementation of a testbed for WMNs using Raspbian OS. We analyze the performance of Optimized Link State Routing (OLSR) protocol in an indoor scenario. For evaluation we...
To have a successful communication in Ad Hoc networks, Cognitive Radio (CR) can funding a flexible utilization of wireless radio spectrums. Routing Protocol is a significant problem in CRNs. Some routing protocol is based on different scenarios and it should incorporate QoS parameters in route definition to support QoS performance. Some revisions are done to the Cognitive Radio Ad Hoc network (CRAHN)...
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