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.
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Showing 1 to 20 of 1327 for “"Ad hoc"”.
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Ad-Hoc Sharing for Palm Devices
… their built- in features for sharing data during ad-hoc collaboration among groups of mobile users are inadequate. In this thesis, we describe a new framework that addresses this problem by allowing users to transparently share the record databases of common applications during spontaneous …
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Scalable wide area ad-hoc networking
… problem of routing algorithms in Mobile Ad-hoc networks (MANET) has conventionally been addressed by introducing hierarchical architectures, clusters, and neighborhood zones. In all of these approaches, some nodes are assigned different routing related roles than others. Examples include …
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The kernel of ad hoc polymorphism
Ad hoc polymorphism allows a value to take on multiple types, with a separate definition of the value provided for each type. We offer a new formalization of this old concept as a typed lambda calculus. Motivated by the aspiration of extending System F with ad hoc constraints, we introduce a new …
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An ad-hoc wireless communication system
This thesis studies the challenges of providing load balancing and fault-tolerant external links between ad-hoc multicast mesh networks. The work is the gateway component of a research platform called FluidVoice, a wireless audio communication system. This system consists of nodes forming a …
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Information collection algorithm for vehicular ad-hoc networks (application domain: Urban Traffic Wireless Vehicular Ad-Hoc Networks (VANETs))
… with (yet to be realized) potential to improve road safety, driving comfort and traffic control. In this research, we present a novel algorithm which is based on V2V communication, uses in-vehicle sensor information and in collaboration with the other vehicles' sensor information can detect road …
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Performance improvement in mobile ad-hoc networks.
… the network performance under realistic mobile ad-hoc networks environments without modification of the standard. Overview of this research is summarized as follows: First, a packet-fragmentation technique to improve network throughput under the worst channel conditions is proposed. While the …
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Energy efficiency in ad-hoc wireless networks
In ad-hoc wireless networks, nodes are typically battery-powered, therefore energy limitations are among the critical constraints in ad-hoc wireless networks' development. The approaches investigated in this thesis to achieve energy efficient performance in wireless networks can be grouped into …
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An Integrated Architecture for Ad Hoc Grids
… the differences in scope and scale, all the traditional grids in practice share some common assumptions. They support mutually collaborative communities, adopt a centralized control for membership, and assume a well-defined non-changing collaboration. To support grid applications that do not …
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Collaboration Enforcement In Mobile Ad Hoc Networks
Mobile Ad hoc NETworks (MANETs) have attracted great research interest in recent years. Among many issues, lack of motivation for participating nodes to collaborate forms a major obstacle to the adoption of MANETs. Many contemporary collaboration enforcement techniques employ reputation mechanisms …
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Securing mobile ad hoc network routing protocols
A Mobile Ad hoc Network (MANET) is a collection of mobile nodes that forms a provisional network dynamically without the aid of any predetermined infrastructure. The salient nature of ad hoc networks renders them vulnerable to numerous types of security attacks. The dynamic feature of ad hoc …
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Mobile ad hoc networks for intelligent systems
Advances in wireless technology and portable computing along with demands for high user mobility have provided a major promotion toward the development of ad hoc networks. Mobile ad hoc networks feature dynamic topology, self-organization, limited bandwidth and battery power of a node. They do not …
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QoS constrained cellular ad hoc augmented networks
… quality of service (QoS) constrained cellular ad hoc augmented network (CAHAN) architectures are proposed for next generation wireless networks. The CAHAN architectures have a hybrid architecture, in which each MT of CDMA cellular networks has ad hoc communication capability. The CAHAN …
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Dynamic services in mobile ad hoc networks
… in infrastructure-less environments. Mobile Ad Hoc Networks (MANET) are the general model of these higly dynamic networks that can be specialized, depending on application cases, in more specific and refined models such as Vehicular Ad Hoc Networks and Wireless Sensor Networks. Two …
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Opportunistic clock synchronization for ad hoc networks
An ad hoc network is a collection of computing nodes communicating over wireless channels without relying on any fi xed infrastructure such as servers and towers. Such networks are useful in rescue operations, and in rural and military settings. Clock synchronization is an essential building block …
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Cooperation enforcement in ad-hoc wireless networks
Ad-hoc networks consist of a system of wireless nodes that can freely and dynamically self-organise into a working network topology. This allows people to internetwork seamlessly in areas that have no preexisting communication infrastructure. Nodes are expected to forward the traffic of other nodes …
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Ad-hoc models for two-photon detectors
Thesis (Elec.E)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.
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Spatial aspects of mobile ad hoc collaboration
Traditionally, communication devices are designed to overcome distance in space or time. How can personal mobile tools augment local interaction and promote spontaneous collaboration between users in proximity? Mobile ad hoc collaboration is an emerging framework that attempts to answer this …
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Routing in heterogeneous wireless ad hoc networks
Wireless ad hoc networks are used in several applications ranging from infrastructure monitoring to providing Internet connectivity to remote locations. A common assumption about these networks is that the devices that form the network are homogeneous in their capabilities. However in reality, the …
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