Old Dominion University

Displaying 1-24 of 24 results

  • White Papers // Nov 2012

    Enhancing Spectrum Hole Utilization Through Adaptive Sensing in Cognitive Radio Systems

    Cognitive Radio (CR) is a new concept in wireless communication systems that aims at enabling dynamic access to the frequency spectrum for unlicensed Secondary Users (SU) through the reuse of licensed frequencies. Specifically, CR systems are expected to detect idle frequency bands that are not actively used by licensed Primary...

    Provided By Old Dominion University

  • White Papers // Oct 2012

    Data and Information Quality Research: Its Evolution and Future

    Awareness of data and information quality issues has grown rapidly in light of the critical role played by the quality of information in the authors' data-intensive, knowledge-based economy. Research in the past two decades has produced a large body of data quality knowledge and has expanded their ability to solve...

    Provided By Old Dominion University

  • White Papers // May 2012

    Energy Detector With Adaptive Sensing Window for Improved Spectrum Utilization in Dynamic Cognitive Radio Systems

    Cognitive Radios (CR) are regarded as a viable solution to enabling flexible use of the frequency spectrum in future generations of wireless systems by taking advantage of spectrum holes, that is idle frequency bands not actively used by Primary Users (PU) for licensed transmissions. The actual utilization of a spectrum...

    Provided By Old Dominion University

  • White Papers // Jan 2012

    The Next Paradigm Shift: From Vehicular Networks to Vehicular Clouds

    The past decade has witnessed a growing interest in vehicular networking and its multiple applications. The initial vision that had fueled research in vehicular networking had originated in an altruistic impulse, namely that radio-equipped vehicles can somehow network together and, by exchanging and aggregating individual views, can keep the drivers...

    Provided By Old Dominion University

  • White Papers // Dec 2011

    Collaboratively Assessing Information Quality on the Web

    The Web has become a large repository of information with varying qualities. Many users often consume information without knowing its quality. Although automatic methods can be used to obtain measurements of certain aspects of quality, they are not reliable and cannot measure all aspects of quality. Users can detect errors...

    Provided By Old Dominion University

  • White Papers // Dec 2011

    Interoperability of Data Created using Extensible Data Standards

    As an important data quality dimension, semantic interoperability of data can potentially be improved using data standards. Certain data standards are extensible, allowing users to introduce custom data elements. How interoperable is data created using an extensible data standard? How does extensibility of a data standard affect interoperability of data...

    Provided By Old Dominion University

  • White Papers // Dec 2011

    Hyperbolic Tree for Effective Visualization of Large Extensible Data Standards

    Large data standards specify tens of thousands of data elements that have intricate relationships. Without effective visualization, it is extremely difficult to understand such large data standards. This is further exacerbated when users are allowed to extend data standards, which in effect produces multiple versions of data standards. In this...

    Provided By Old Dominion University

  • White Papers // Nov 2011

    Improving the Data Quality of Web Services Composition

    The Internet era has evolved from a Web of documents to a Web of services. Web services are intended to be application components that can be reused and integrated to create more advanced, innovative Web applications without needing to develop them from scratch. Unfortunately, Web services distributed on the Internet...

    Provided By Old Dominion University

  • White Papers // May 2011

    Level of Presence in Team-Building Activities: Gaming Component in Virtual Environments

    Historically the training of teams has been implemented using a face-to-face approach. In the past decade, on-line multiuser virtual environments have offered a solution for training teams whose members are geographically dispersed. In order to develop on effective team training activity, a high sense of presence among the participant needs...

    Provided By Old Dominion University

  • White Papers // Apr 2011

    TDMA Slot Reservation in Cluster-Based VANET

    A Vehicular Ad-hoc NETwork (VANET) is an autonomous and self-configuring network of mobile hosts connected by wireless links. It is a highly dynamic network and has harsh channel conditions. Cluster-based MAC scheme in VANET is needed to overcome the lack of specialized hardware for infrastructure and the mobility to support...

    Provided By Old Dominion University

  • White Papers // Jan 2011

    NOTICE: An Architecture for Notification of Traffic Incidents

    The authors, introduce NOTICE, a secure, privacy-aware architecture for the notification of traffic incidents. Using sensor belts embedded in the roadway, traffic-related messages and advisories are carried between belts by passing cars. NOTICE moves the responsibility for making decisions about traffic-related information dissemination to the infrastructure rather than leaving those...

    Provided By Old Dominion University

  • White Papers // Sep 2010

    Monitoring Free Flow Traffic Using Vehicular Networks

    The authors present DTMon, a dynamic traffic monitoring system using vehicular networks, and analyze its performance in free flow (i.e., non-congested) traffic. DTMon uses roadside infrastructure to gather and report current traffic conditions to traffic management centers and equipped vehicles. They analyze how traffic characteristics such as speed, flow rate,...

    Provided By Old Dominion University

  • White Papers // Aug 2010

    Using Traffic Flow for Cluster Formation in Vehicular Ad-Hoc Networks

    The authors present a lane-based clustering algorithm designed to provide stability in cluster lifetime for Vehicular Adhoc NETworks (VANETs) in urban scenarios. Stable clustering methods reduce the overhead of re-clustering and lead to an efficient hierarchical network topology. During the creation of VANET clusters, cluster members select one member to...

    Provided By Old Dominion University

  • White Papers // Aug 2010

    FIRMS: A Framework for Intelligent Road Monitoring System Using Smart Sensors

    The authors introduce a novel system to monitor traffic using deployed nodes placed uniformly on the highway to monitor the road traffic. They take advantage of the Cat eye's on the road by adding sensing capability (metal detectors) with embedded processors, the sensing feature provides an accurate detection of the...

    Provided By Old Dominion University

  • White Papers // Jun 2010

    Highway Mobility and Vehicular Ad-Hoc Networks in Ns-3

    The study of Vehicular Ad-hoc NETworks (VANETs) requires efficient and accurate simulation tools. As the mobility of vehicles and driver behavior can be affected by network messages, these tools must include a vehicle mobility model integrated with a quality network simulator. The authors present the first implementation of a well-known...

    Provided By Old Dominion University

  • White Papers // Mar 2010

    Reliable Routing in Vehicular Ad Hoc Networks

    One of the notoriously difficult problems in Vehicular Ad-hoc NETworks (VANET) is to ensure that established routing paths do not break before the end of data transmission. This is a difficult problem because the network topology is constantly changing and the wireless communication links are inherently unstable, due to high...

    Provided By Old Dominion University

  • White Papers // Feb 2010

    p-IVG: Probabilistic Inter-Vehicle Geocast for Dense Vehicular Networks

    In this paper, the authors study the effect of dense vehicular networks on data dissemination. When using intelligent broadcasting techniques, such as Inter-Vehicle Geocast, they have discovered the spatial broadcast storm problem in which multiple vehicles will be chosen to re-broadcast frames at nearly the same time, resulting in channel...

    Provided By Old Dominion University

  • White Papers // Jan 2010

    An Architecture for Robust QoS Provisioning for Mobile Tactical Communications

    This paper proposes a rapidly deployable, heterogeneous network that is well suited for both multimedia and datagram traffic. The main motivation for the work was the recognition of the fart that in military and emergency type network, the stations may have diverse communication capabilities. While some stations have strong transmitters...

    Provided By Old Dominion University

  • White Papers // Oct 2009

    Providing Location Security in Vehicular Ad-hoc Networks

    It is fair to say that most, if not all, Vehicular Ad-hoc NETworks (VANET) applications rely on accurate location information. It is, therefore, imperative to provide mechanisms that ensure the integrity, availability, and confidentiality of location information. In this paper, the authors present a number of location security mechanisms specifically...

    Provided By Old Dominion University

  • White Papers // Jun 2009

    Dynamic Adaptation of Joint Transmission Power and Contention Window in VANET

    In this paper, the authors propose an algorithm for joint adaptation of transmission power and contention window to improve the performance of vehicular network in a cross layer approach. The high mobility of vehicles in vehicular communication results in the change in topology of the Vehicular Ad-hoc NETwork (VANET) dynamically,...

    Provided By Old Dominion University

  • White Papers // Jun 2009

    Investigating the Change of Web Pages' Titles Over Time

    Inaccessible web pages are part of the browsing experience. The content of these pages however is often not completely lost but rather missing. Lexical Signatures (LS) generated from the web pages' textual content have been shown to be suitable as search engine queries when trying to discover a (missing) web...

    Provided By Old Dominion University

  • White Papers // May 2009

    A Novel Parking Service Using Wireless Networks

    Parking is costly and limited in almost every major city in the world. The misparking aggravates the competition of parking slots. Innovative parking systems for meeting near-term parking demand are needed. A probabilistic approach is addressed to model the misparking of the current parking system. To provide an intelligent parking...

    Provided By Old Dominion University

  • White Papers // Nov 2008

    Light-Weight Laser-Aided Position Verification for CASCADE

    In this paper, the authors present a light-weight position verification technique for VANETs. Their technique supplements the Received Signal Strength Indication (RSSI) technique with a laser rangefinder to reduce the inaccuracy incurred in the RSSI. They used their new position verification technique to tighten the security in CASCADE (Cluster-based Accurate...

    Provided By Old Dominion University

  • White Papers // Oct 2008

    CASCADE: Cluster-Based Accurate Syntactic Compression of Aggregated Data in VANETs

    The authors present a method for accurate aggregation of highway traffic information in Vehicular Ad hoc NETworks (VANETs). Highway congestion notification applications need to disseminate information about traffic conditions to distant vehicles. In dense traffic, aggregation is needed to allow a single frame to carry information about a large number...

    Provided By Old Dominion University

  • White Papers // Jan 2012

    The Next Paradigm Shift: From Vehicular Networks to Vehicular Clouds

    The past decade has witnessed a growing interest in vehicular networking and its multiple applications. The initial vision that had fueled research in vehicular networking had originated in an altruistic impulse, namely that radio-equipped vehicles can somehow network together and, by exchanging and aggregating individual views, can keep the drivers...

    Provided By Old Dominion University

  • White Papers // Aug 2010

    FIRMS: A Framework for Intelligent Road Monitoring System Using Smart Sensors

    The authors introduce a novel system to monitor traffic using deployed nodes placed uniformly on the highway to monitor the road traffic. They take advantage of the Cat eye's on the road by adding sensing capability (metal detectors) with embedded processors, the sensing feature provides an accurate detection of the...

    Provided By Old Dominion University

  • White Papers // Mar 2010

    Reliable Routing in Vehicular Ad Hoc Networks

    One of the notoriously difficult problems in Vehicular Ad-hoc NETworks (VANET) is to ensure that established routing paths do not break before the end of data transmission. This is a difficult problem because the network topology is constantly changing and the wireless communication links are inherently unstable, due to high...

    Provided By Old Dominion University

  • White Papers // May 2012

    Energy Detector With Adaptive Sensing Window for Improved Spectrum Utilization in Dynamic Cognitive Radio Systems

    Cognitive Radios (CR) are regarded as a viable solution to enabling flexible use of the frequency spectrum in future generations of wireless systems by taking advantage of spectrum holes, that is idle frequency bands not actively used by Primary Users (PU) for licensed transmissions. The actual utilization of a spectrum...

    Provided By Old Dominion University

  • White Papers // Apr 2011

    TDMA Slot Reservation in Cluster-Based VANET

    A Vehicular Ad-hoc NETwork (VANET) is an autonomous and self-configuring network of mobile hosts connected by wireless links. It is a highly dynamic network and has harsh channel conditions. Cluster-based MAC scheme in VANET is needed to overcome the lack of specialized hardware for infrastructure and the mobility to support...

    Provided By Old Dominion University

  • White Papers // Nov 2012

    Enhancing Spectrum Hole Utilization Through Adaptive Sensing in Cognitive Radio Systems

    Cognitive Radio (CR) is a new concept in wireless communication systems that aims at enabling dynamic access to the frequency spectrum for unlicensed Secondary Users (SU) through the reuse of licensed frequencies. Specifically, CR systems are expected to detect idle frequency bands that are not actively used by licensed Primary...

    Provided By Old Dominion University

  • White Papers // Oct 2012

    Data and Information Quality Research: Its Evolution and Future

    Awareness of data and information quality issues has grown rapidly in light of the critical role played by the quality of information in the authors' data-intensive, knowledge-based economy. Research in the past two decades has produced a large body of data quality knowledge and has expanded their ability to solve...

    Provided By Old Dominion University

  • White Papers // Nov 2011

    Improving the Data Quality of Web Services Composition

    The Internet era has evolved from a Web of documents to a Web of services. Web services are intended to be application components that can be reused and integrated to create more advanced, innovative Web applications without needing to develop them from scratch. Unfortunately, Web services distributed on the Internet...

    Provided By Old Dominion University

  • White Papers // Dec 2011

    Collaboratively Assessing Information Quality on the Web

    The Web has become a large repository of information with varying qualities. Many users often consume information without knowing its quality. Although automatic methods can be used to obtain measurements of certain aspects of quality, they are not reliable and cannot measure all aspects of quality. Users can detect errors...

    Provided By Old Dominion University

  • White Papers // Dec 2011

    Interoperability of Data Created using Extensible Data Standards

    As an important data quality dimension, semantic interoperability of data can potentially be improved using data standards. Certain data standards are extensible, allowing users to introduce custom data elements. How interoperable is data created using an extensible data standard? How does extensibility of a data standard affect interoperability of data...

    Provided By Old Dominion University

  • White Papers // Dec 2011

    Hyperbolic Tree for Effective Visualization of Large Extensible Data Standards

    Large data standards specify tens of thousands of data elements that have intricate relationships. Without effective visualization, it is extremely difficult to understand such large data standards. This is further exacerbated when users are allowed to extend data standards, which in effect produces multiple versions of data standards. In this...

    Provided By Old Dominion University

  • White Papers // Jan 2010

    An Architecture for Robust QoS Provisioning for Mobile Tactical Communications

    This paper proposes a rapidly deployable, heterogeneous network that is well suited for both multimedia and datagram traffic. The main motivation for the work was the recognition of the fart that in military and emergency type network, the stations may have diverse communication capabilities. While some stations have strong transmitters...

    Provided By Old Dominion University

  • White Papers // Jun 2009

    Investigating the Change of Web Pages' Titles Over Time

    Inaccessible web pages are part of the browsing experience. The content of these pages however is often not completely lost but rather missing. Lexical Signatures (LS) generated from the web pages' textual content have been shown to be suitable as search engine queries when trying to discover a (missing) web...

    Provided By Old Dominion University

  • White Papers // May 2011

    Level of Presence in Team-Building Activities: Gaming Component in Virtual Environments

    Historically the training of teams has been implemented using a face-to-face approach. In the past decade, on-line multiuser virtual environments have offered a solution for training teams whose members are geographically dispersed. In order to develop on effective team training activity, a high sense of presence among the participant needs...

    Provided By Old Dominion University

  • White Papers // Sep 2010

    Monitoring Free Flow Traffic Using Vehicular Networks

    The authors present DTMon, a dynamic traffic monitoring system using vehicular networks, and analyze its performance in free flow (i.e., non-congested) traffic. DTMon uses roadside infrastructure to gather and report current traffic conditions to traffic management centers and equipped vehicles. They analyze how traffic characteristics such as speed, flow rate,...

    Provided By Old Dominion University

  • White Papers // Jun 2010

    Highway Mobility and Vehicular Ad-Hoc Networks in Ns-3

    The study of Vehicular Ad-hoc NETworks (VANETs) requires efficient and accurate simulation tools. As the mobility of vehicles and driver behavior can be affected by network messages, these tools must include a vehicle mobility model integrated with a quality network simulator. The authors present the first implementation of a well-known...

    Provided By Old Dominion University

  • White Papers // Aug 2010

    Using Traffic Flow for Cluster Formation in Vehicular Ad-Hoc Networks

    The authors present a lane-based clustering algorithm designed to provide stability in cluster lifetime for Vehicular Adhoc NETworks (VANETs) in urban scenarios. Stable clustering methods reduce the overhead of re-clustering and lead to an efficient hierarchical network topology. During the creation of VANET clusters, cluster members select one member to...

    Provided By Old Dominion University

  • White Papers // Oct 2009

    Providing Location Security in Vehicular Ad-hoc Networks

    It is fair to say that most, if not all, Vehicular Ad-hoc NETworks (VANET) applications rely on accurate location information. It is, therefore, imperative to provide mechanisms that ensure the integrity, availability, and confidentiality of location information. In this paper, the authors present a number of location security mechanisms specifically...

    Provided By Old Dominion University

  • White Papers // Jun 2009

    Dynamic Adaptation of Joint Transmission Power and Contention Window in VANET

    In this paper, the authors propose an algorithm for joint adaptation of transmission power and contention window to improve the performance of vehicular network in a cross layer approach. The high mobility of vehicles in vehicular communication results in the change in topology of the Vehicular Ad-hoc NETwork (VANET) dynamically,...

    Provided By Old Dominion University

  • White Papers // May 2009

    A Novel Parking Service Using Wireless Networks

    Parking is costly and limited in almost every major city in the world. The misparking aggravates the competition of parking slots. Innovative parking systems for meeting near-term parking demand are needed. A probabilistic approach is addressed to model the misparking of the current parking system. To provide an intelligent parking...

    Provided By Old Dominion University

  • White Papers // Feb 2010

    p-IVG: Probabilistic Inter-Vehicle Geocast for Dense Vehicular Networks

    In this paper, the authors study the effect of dense vehicular networks on data dissemination. When using intelligent broadcasting techniques, such as Inter-Vehicle Geocast, they have discovered the spatial broadcast storm problem in which multiple vehicles will be chosen to re-broadcast frames at nearly the same time, resulting in channel...

    Provided By Old Dominion University

  • White Papers // Nov 2008

    Light-Weight Laser-Aided Position Verification for CASCADE

    In this paper, the authors present a light-weight position verification technique for VANETs. Their technique supplements the Received Signal Strength Indication (RSSI) technique with a laser rangefinder to reduce the inaccuracy incurred in the RSSI. They used their new position verification technique to tighten the security in CASCADE (Cluster-based Accurate...

    Provided By Old Dominion University

  • White Papers // Oct 2008

    CASCADE: Cluster-Based Accurate Syntactic Compression of Aggregated Data in VANETs

    The authors present a method for accurate aggregation of highway traffic information in Vehicular Ad hoc NETworks (VANETs). Highway congestion notification applications need to disseminate information about traffic conditions to distant vehicles. In dense traffic, aggregation is needed to allow a single frame to carry information about a large number...

    Provided By Old Dominion University

  • White Papers // Jan 2011

    NOTICE: An Architecture for Notification of Traffic Incidents

    The authors, introduce NOTICE, a secure, privacy-aware architecture for the notification of traffic incidents. Using sensor belts embedded in the roadway, traffic-related messages and advisories are carried between belts by passing cars. NOTICE moves the responsibility for making decisions about traffic-related information dissemination to the infrastructure rather than leaving those...

    Provided By Old Dominion University