TECH DIGITAL RESOURCE LIBRARY

University of Florida


Latest Content From University of Florida

Whitepaper: Contention Window Based Parameter Selection to Improve Powerline MAC Efficiency for Large Number of Users

by University of FloridaJan 01, 2008

Effective use of the power line bandwidth requires robust physical and Medium Access Control (MAC) protocols to mitigate the harsh conditions of the power line channel, as well as the capability to support prioritized multimedia traffic. Just as in 802.11, the throughput performance of this scheme becomes critical when the number of users increases, as in BPL. In this paper, a modification in the medium access control protocol of Home Plug 1.0 is proposed, to make it a constant contention window based scheme.


Whitepaper: A Service-Oriented, Scalable Approach to Grid-Enabling of Legacy Scientific Applications

by University of FloridaJan 01, 2008

This research paper from University of Florida discusses a scalable approach to the enabling of legacy scientific applications on computing Grids using a service-oriented architecture. As per of this paper Grid enabling means turning an existing application, installed on a Grid resource, into a service and generating the application-specific user interfaces to use that application through a web portal. Scalability is achieved by providing a common abstraction for a category of applications and providing a generic application service to wrap those applications as services. The focus of this paper’s approach is on Grid-enabling command-oriented scientific applications.


Whitepaper: Analysis of Protocol Capacity of IEEE 802.11 Wireless LAN Medium Access Control (MAC) Protocol

by University of FloridaJan 01, 2008

This paper focuses on the IEEE 802.11 WLAN MAC and analysis of the efficiency of this protocol. It then discusses the algorithms which can be used or modified to increase the overall throughput and performance. The most common 802.11 standards include the initial IEEE 802.11 standard which used the 2.4 GHz band and provided data rates up to 2 Mbps. The IEEE 802.11b provides data rates up to 11 Mbps while using the same spectrum as the initial standard. It also uses the same DSSS (Direct Sequence Spread Spectrum) techniques.


Whitepaper: Self-Sensing Spaces: Smart Plugs for Smart Environments

by University of FloridaJan 01, 2008

With the availability of such products, there becomes an increased need for a scalable smart environment. The use of RFID technology in smart spaces makes installing new devices a simple, automatic and scalable task. There is no need to reprogram a smart space anymore every time one needs to install a new device. A smart space will be able to automatically integrate the new device upon installation.


Whitepaper: An OPNET Modeler Simulation Study of the VISA Protocol for Multi-Network Authentication

by University of FloridaJan 01, 2008

In the last decade of the twentieth century, wireless communications was believed to be heading toward a global wireless system, such as UMTS or IMT2000. In fact, wireless communications is rapidly becoming a highly distributed collection of different types of networks. The third Generation (3G) wireless communications infrastructure has become a highly distributed collection of wireless networks that offer a wide variety of options for connectivity. In this paper, an adVanced Inter-System Authentication (VISA) process is introduced to validate unknown users that have established an account history with a previous network.


Whitepaper: Performance of MIP/WLAN in Rapid Mobility Environments

by University of FloridaJan 01, 2008

In this paper, the performance of Mobile IP (MIP) over Wireless LAN is assessed using a testbed at different vehicular speeds. The result shows that current MIP practice is not suitable for rapidly moving environments. Through careful analysis of the relationship between performance and speed, and through a breaking down analysis of the handoff latency of MIP/WLAN, a speed adaptive MIP protocol extension is projected. In this protocol extension, a concept, handoff rate, is defined and is used to extend the MIP protocol.


Whitepaper: Rapid Mobility of Mobile IP Over WLAN

by University of FloridaJan 01, 2008

In this paper, the rapid mobility of MIP/WLAN is emulated on a test-bed. The performance of MIP/WLAN at different moving speeds is evaluated. The result shows that current MIP protocol is not suitable for rapid moving environments. This white paper depicts the relationship between the performance and the moving speed and breaks down the handoff latency of MIP/WLAN. A Speed Adaptive MIP extension is proposed and implemented on Hierarchical MIP. The emulation result shows that the Speed Adaptive MIP greatly improves the performance of MIP/WLAN in rapid moving environments.


Whitepaper: RFID Information Grid for Blind Navigation and Wayfinding

by University of FloridaJan 01, 2008

Blind students are at a tremendous disadvantage when they arrive on a college campus, where they must somehow face the challenges of being an incoming freshman who can not find their classrooms, meet with academic advisors, or find the line to stand in during the professor’s office hours to ask a question about homework. This white paper describes a navigation and location determination system for the blind using an RFID tag grid. Each RFID tag is programmed upon installation with spatial coordinates and information describing the surroundings. This allows for a self-describing and localized information system.


Whitepaper: Speed Adaptive MIP

by University of FloridaJan 01, 2008

Mobile IP is a promising technology to eliminate the barrier of location for wireless internet usage. Third Generation services combine high speed mobile access with IP-based services. Mobile IP can be used as the common macro mobility management framework to merge all these technologies and allow mobile users to roam between different access networks. In this paper, the performance of MIP at different moving speeds is evaluated on an emulation testbed. This paper depicts the relationship between the performance and the moving speed and breaks down the handoff latency of MIP.


Whitepaper: RFID Information Grid and Wearable Computing Solution to the Problem of Wayfinding for the Blind User in a Campus Environment

by University of FloridaJan 01, 2008

Blind students are at a disadvantage when they arrive on a college campus, where they must somehow face the challenges of being an incoming freshman who can not find their classrooms, meet with academic advisors, or find the line to stand in during the professor’s office hours to ask a question about homework. This paper describes a navigation and location determination system for the blind using an RFID tag grid. Each RFID tag is programmed upon installation with spatial coordinates which allows for a self-describing, localized information system with no dependency on a centralized database or wireless infrastructure for communications.