Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"Wireless ad hoc network"”.
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A design of variable transmission power control for wireless ad-hoc network
Wireless Ad-hoc Network has emanated to be a promising network paradigm that can handle last mile technology due to unprecedented growth of internet users. This network is promising because it extends network to remote areas such as congested environments, rural environments etc. It is known that …
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An All-to-All Multicast Routing Protocol in a Wireless Ad-Hoc Network to Improve Channel Utilization
<p>Wireless Ad-hoc network has become more and more popular. Several different multicasting schemes for this type of network have been developed. But most of them are targeting a situation where the total number of senders is much less than the total number of receivers. This thesis analyzes …
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The Grid Roofnet : a rooftop ad hoc wireless network
This thesis describes the Grid Roofnet, a rooftop wireless Ad Hoc network built using off the shelf computers and 802.11 hardware along with special software. The Roofnet is a real-world testbed for wireless Ad Hoc networking research, and as a side effect also provides network access to a small …
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Effects of loss rate on ad hoc wireless routing
This thesis uses measurements from a deployed wireless ad hoc network to illustrate the effects of link loss rates on routing protocol performance. Measurements of this network show that the radio links between the majority of nodes have substantial loss rates. These loss rates are high enough to …
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Enhancing end-to-end quality of service provisioning in wireless ad hoc networks using service vectors
… end-to-end QoS provisioning and granularity in wireless ad hoc networks is proposed in this thesis. Recently, a new concept called service vector has been introduced, which enables an end host to choose different service classes along its data path. This scheme enhances the user benefits from …
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Air traffic control using Virtual Stationary Automata
… to automated air traffic control. I use a wireless ad-hoc network to simulate a layer of Virtual Stationary Automata, or VSAs, which are virtual machines located at fixed locations in space. These VSAs can then be used to help coordinate the aircraft in the air traffic control system. I …
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Design and Implementation of An Emulation Testbed for Video Communications in Ad Hoc Networks
… communication is an important application in wireless ad hoc network environment. Although current off-the-shelf video communication software would work for ad hoc network operating under stable conditions (e.g., extremely low link and node failures), video communications for ad hoc network …
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Cluster-based wireless mobile ad-hoc network security
A wireless ad-hoc network is a cooperative communication network deployed with a specific purpose. It is characterized by dynamically changing topology with no fixed infrastructure which exhibits a perfectly vulnerable state for a number of different kinds of attacks. This thesis proposes a novel …
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Reliability and energy-efficiency in wireless ad-hoc networks
In this thesis, we address issues related to reliability and energy-efficiency in wireless ad hoc networks. In the first part of the work, we deal with the problem of simultaneously routing data along multiple disjoint paths from a source to destination in the most energy efficient manner. To this …
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Probabilistic Trans-Algorithmic Search
… configuration of large-scale systems such as networks requires parameter optimization within a limited amount of time. This time limit is even more pressing when configuration is needed as a recovery response to a failure in the system. To quickly configure such systems in an online manner, we …
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Reliable Multicast in Mobile Ad Hoc Wireless Networks
A mobile wireless ad hoc network (MANET) consists of a group of mobile nodes communicating wirelessly with no fixed infrastructure. Each node acts as source or receiver, and all play a role in path discovery and packet routing. MANETs are growing in popularity due to multiple usage models, ease of …
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Maximizing throughput while maintaining fairness and priority in wireless ad-hoc networks
Ad-Hoc wireless network, not a new field of research, has been gaining a lot of popularity in recent years because of its applications in emergency rescue, surveying, military, sensor networking, entertainment and community wireless networking etc. A lot of research has been done on improving the …
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End-to-end security mechanisms for the optimized link state routing protocol for wireless ad hoc networks
Routing protocols designed for wireless ad hoc networks are, in general, highly vulnerable to various forms of security attacks. A routing protocol is vital to the functioning of a wireless ad hoc network, and hence, security needs to be present to negate any potential malicious influences. …
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Critical Node Identifcation for accessing network vulnerability, a necessary consideration
… of critical nodes is crucial for assessing network vulnerability and survivability. This thesis presents two new approaches for the identification of critical nodes in a network with the first being an intuition based approach and the second being build on a mathematical framework. The first …
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Mobility-based Routing Overhead Management in Reconfigurable Wireless Ad hoc Networks
Mobility-Based Routing Overhead Management in Reconfigurable Wireless Ad Hoc Networks Routing Overheads are the non-data message packets whose roles are establishment and maintenance of routes for data packets as well as neighbourhood discovery and maintenance. They have to be broadcasted in the …
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Group Key Management in Wireless Ad-Hoc and Sensor Networks
… military domains is being deployed in WAHNs. A Wireless Ad-hoc Network (WARN) is a collection of autonomous nodes or terminals that communicate with each other by forming a multi-hop radio network and maintaining connectivity in a decentralized manner. A Mobile Ad-hoc Network (MANET) is a …
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Adaptive and autonomous protocol for spectrum identification and coordination in ad hoc cognitive radio network
The decentralised structure of wireless Ad hoc networks makes them most appropriate for quick and easy deployment in military and emergency situations. Consequently, in this thesis, special interest is given to this form of network. Cognitive Radio (CR) is defined as a radio, capable of identifying …
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Performance study on a dual prohibition Multiple Access protocol in mobile Ad Hoc and Wireless Mesh networks
Wireless networks are less reliable than wired networks because channels are “exposed” to the surrounding environment that is susceptible to interference and noise. To minimize losses of data due to collisions, wireless networks need a mechanism to regulate the access on the transmission medium. …
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Hamming distance as a metric for the detection of side channel in 802.11 wireless communications
A wireless network can be exploited in many ways. One way is through intentionally corrupting the Frame Check Sequence (FCS) field by using a different Cyclic Redundancy Check (CRC) polynomial in order to create a side channel. Malicious nodes exploit the fact that normal unsuspecting nodes will …
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On applying network coding to wireless ad hoc networks : A study of robustness, efficiency and cross-layer synergy
The technique of wireless ad hoc networks is utilized in more and more applications. Network coding is quite suitable for wireless networks to improve throughput. In this thesis, we analyse several issues on applying network coding techniques to wireless ad hoc networks. Several aspects, including …
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