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Virginia Polytechnic Institute and State University
(94 results)-
White Papers
Multi-Dimensional Characterization of Temporal Data Mining on Graphics Processors
May 1, 2009, 12:00am PDT
Through the algorithmic design patterns of data parallelism and task parallelism, the Graphics Processing Unit (GPU) offers the potential to vastly accelerate discovery and innovation across a...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Overview of Emerging Broadband Wireless Technologies for Transportation
November 11, 2008, 12:00am PST
Departments of Transportation depend considerably on communications between Intelligent Transportation Systems (ITS) field devices and Transportation Operations Centers (TOC). The future of...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Evaluation of Online Resources in Assisting Phishing Detection
April 22, 2009, 12:00am PDT
Phishing is an attempt to fraudulently acquire users' sensitive information, such as passwords or financial information, by masquerading as a trustworthy entity in online transactions. Recently, a...
Provided by Virginia Polytechnic Institute and State University
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White Papers
An Open Source Platform for Analog/Digital Control and Interactive Ambient Lighting in a Traditional DJ Form Factor
June 29, 2008, 12:00am PDT
This paper discusses the concept and design of the Aurora device along with descriptions of the mixer's hardware and firmware. The Aurora platform is a dual MCU data acquisition device that is...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Network Interface Cards as First-Class Citizens
February 6, 2009, 12:00am PST
Network performance has improved by over an order-of-magnitude in the past decade. While, the overall system architecture itself has made modification attempts to match such growth, these changes...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Analysis of Payment Transaction Security in Mobile Commerce
September 22, 2004, 12:00am PDT
Mobile payment is the process of two parties exchanging financial value using a mobile device in return for goods or services. This paper is an analysis of the security issues in mobile payment...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Lightweight Data Management for Compositional Modeling in Problem Solving Environments
January 1, 2010, 12:00am PST
The paper outlines various design considerations and implementation options pertaining to lightweight data management in Problem Solving Environments (PSEs). The emphasis is on compositional...
Provided by Virginia Polytechnic Institute and State University
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White Papers
The Green500 List: Year One
June 20, 2009, 12:00am PDT
The latest release of the Green500 List in November 2008 marked its one-year anniversary. As such, this paper aims to provide an analysis and retrospective examination of the Green500 List in...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Reconfigurable Modem Architecture for CDMA Based 3G Handsets
June 28, 2006, 12:00am PDT
Third Generation (3G) cellular standards has seen many changes in the design specifications during its evolution. There also exist multiple standards, CDMA2000 and WCDMA, which have different...
Provided by Virginia Polytechnic Institute and State University
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White Papers
On QoS Guarantees With Reward Optimization for Servicing Multiple Priority Classes in Wireless Networks
May 19, 2008, 12:00am PDT
Authors report performance characteristics of a class of Call Admission Control (CAC) algorithms designed for servicing multiple priority classes in wireless networks with the goal of Quality of...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Adaptive QoS Control Based on Benefit Optimization for Video Servers Providing Differentiated Services
January 1, 2010, 12:00am PST
This paper proposes and analyzes Quality of Service (QoS) control algorithms for video servers designed to provide differentiated video streaming services. The design concepts are based on...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Modeling Multigrain Parallelism on Heterogeneous Multi-Core Processors: A Case Study of the Cell BE
November 15, 2007, 12:00am PST
Heterogeneous multi-core processors invest the most significant portion of their transistor budget in customized "Accelerator" cores, while using a small number of conventional low-end cores for...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Toward Secure Distributed Spectrum Sensing in Cognitive Radio Networks
November 19, 2007, 12:00am PST
Cognitive Radio (CR) is a revolutionary technology that promises to alleviate the spectrum shortage problem and to bring about remarkable improvement in spectrum utilization. Spectrum sensing is...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Assessment of Current and Emerging Broadband Wireless Technologies for VDOT?s Operations Program
June 30, 2008, 12:00am PDT
The Virginia Department of Transportation's (VDOT) Operations Program depends considerably on communications between Intelligent Transportation Systems (ITS) field devices and Transportation...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Wireless Sensor Network Radio Power Management and Simulation Models
February 22, 2010, 12:00am PST
Wireless Sensor Networks (WSNs) create a new frontier in collecting and processing data from remote locations. The IEEE 802.15.4 Wireless Personal Area Network-Low Rate (WPAN-LR) WSNs rely on...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Teachers' Perceptions Of The Importance Of Identified Servant Leadership Characteristics For High School Principals In Two Diverse Communities
March 17, 2010, 12:00am PDT
The purpose of this paper was to determine whether there are differences in the perceptions of the importance of identified servant leadership characteristics for high school principals held by...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Using QFD to Improve SOA Applications in the Retail Industry
May 1, 2007, 12:00am PDT
This paper illustrates a framework for Information Technology (IT) service development that translates the Voice Of the Customer (VOC) into Service-Oriented Architecture (SOA) design requirements...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Application of Artificial Intelligence to Wireless
September 20, 2007, 12:00am PDT
This dissertation provides the theory, design, and implementation of a cognitive engine, the enabling technology of cognitive radio. A cognitive radio is a wireless communications device capable...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Cross-Layer Optimization for Wireless Sensor Network With Multi-Packet Reception
June 26, 2010, 12:00am PDT
In this paper, the authors consider how to exploit Multi-Packet Reception (MPR) to increase the capacity for a wireless sensor network. Since MPR behavior at the physical layer affects link layer...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Network Capacity of UWB-Based Sensor Networks
June 3, 2008, 12:00am PDT
Ultra-WideBand (UWB) has great potential for wireless communications in emerging applications such as sensor networks. This paper studies the following fundamental problems for UWB-based sensor...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Multicast Communications in Multi-Hop Cognitive Radio Networks
September 13, 2010, 12:00am PDT
The authors study a multicast communication problem in a multi-hop ad hoc network where each node is equipped with a Cognitive Radio (CR). The goal is to minimize the required network-wide...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Theoretical Results on Base Station Movement Problem for Sensor Network
April 27, 2009, 12:00am PDT
The benefits of using mobile base station to prolong sensor network lifetime have been well recognized. However, due to the complexity of the problem (time-dependent network topology and traffic...
Provided by Virginia Polytechnic Institute and State University
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White Papers
On Renewable Sensor Networks With Wireless Energy Transfer
February 21, 2011, 12:00am PST
Traditional wireless sensor networks are constrained by limited battery energy. Thus, finite network lifetime is widely regarded as a fundamental performance bottleneck. Recent breakthrough in the...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Design Guidelines for Routing Metrics in Multihop Wireless Networks
February 21, 2008, 12:00am PST
The design of a routing protocol must be based on the characteristics of its target networks. The diversity of wireless networks motivates the design of different routing metrics, capturing...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Coding-Aware Routing for Unicast Sessions in Wireless Mesh Networks
March 11, 2010, 12:00am PST
The selection of routes is an important issue in wireless networks when network coding is used. Existing research formulate network-coding-aware routing as a linear optimization program. However,...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Joint Transport, Routing and Spectrum Sharing Optimization for Wireless Networks With Frequency-Agile Radios
August 29, 2008, 12:00am PDT
This paper describe sand analyzes the design of a joint Transport, Routing and Spectrum Sharing (TRSS) optimization algorithm for wireless networks with frequency agile radios. The authors...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Routing Metric Designs for Greedy, Face and Combined-Greedy-Face Routing
December 31, 2008, 12:00am PST
Different geographic routing protocols have different requirements on routing metric designs to ensure proper operation. Combining a wrong type of routing metric with a geographic routing protocol...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Routing Metrics Design for Multihop Wireless Networks
June 30, 2007, 12:00am PDT
The design of a routing protocol must be based on the characteristics of its target networks. The diversity of wireless networks motivates the design of different routing metrics, capturing...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Compatibility Study for Optimal Tree-Based Broadcast Routing
March 9, 2009, 12:00am PDT
Broadcast routing is a critical component in the routing design. While there are plenty of routing metrics and broadcast routing schemes in current literature, it remains an unsolved problem as to...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Greedy Routing and Its Algebra in Geographic Routing
July 21, 2008, 12:00am PDT
Geographic routing, also called position-based routing, has been receiving significant attention since it was originally proposed in the 1980s. Compared with topology-based routing, geographic...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Evaluating RFID Research a Literature Review
November 28, 2007, 12:00am PST
As the authors approach the end of the first decade of the 21stCentury, research pertaining to Radio Frequency IDentification (RFID) has increased. RFID is an innovative information technology...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Cross-Layer Optimization of MIMO-Based Mesh Networks With Gaussian Vector Broadcast Channels
April 7, 2007, 12:00am PDT
MIMO technology is one of the most significant advances in the past decade to increase channel capacity and has a great potential to improve network capacity for mesh networks. In a MIMO-based...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Architecting Network-Centric Software Systems: A Style-Based Beginning
January 1, 2011, 12:00am PST
With the advent of potent network technology, software development has evolved from traditional platform-centric construction to network-centric evolution. This change involves largely the way the...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Prediction-Based Prefetching for Remote Rendering Streaming in Mobile Virtual Environments
June 13, 2007, 12:00am PDT
Remote Image-Based Rendering (IBR) is the most suitable solution for rendering complex 3D scenes on mobile devices, where the server renders the 3D scene and streams the rendered images to the...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Design and Evaluation of Techniques to Utilize Implicit Rating Data in Complex Information Systems
January 1, 2007, 12:00am PST
Research in personalization, including recommender systems, focuses on applications such as in online shopping malls and simple information systems. These systems consider user profile and item...
Provided by Virginia Polytechnic Institute and State University
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White Papers
On Utilization of Contributory Storage in Desktop Grids
May 1, 2007, 12:00am PDT
The availability of desktop grids and shared computing platforms has popularized the use of contributory resources, such as desktops, as computing substrates for a variety of applications....
Provided by Virginia Polytechnic Institute and State University
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White Papers
A Pluggable Framework for Lightweight Task Offloading in Parallel and Distributed Computing
January 6, 2009, 12:00am PST
Multicore processors have quickly become ubiquitous in supercomputing, cluster computing, datacenter computing, and even personal computing. Software advances, however, continue to lag behind. In...
Provided by Virginia Polytechnic Institute and State University
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White Papers
A Workload-Aware, Eco-Friendly Daemon for Cluster Computing
December 7, 2008, 12:00am PST
This paper presents an eco-friendly daemon that reduces power consumption while better maintaining high performance via a novel behavioral quantification of workload. Specifically, the behavioral...
Provided by Virginia Polytechnic Institute and State University
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White Papers
An Empirical Study of a Repeatable Method for Reengineering Procedural Software Systems to Object-Oriented Systems
August 25, 2008, 12:00am PDT
This paper describes a repeatable method for reengineering a procedural system to an object-oriented system. The method uses coupling metrics to assist a domain expert in identifying candidate...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Power Saving Experiments for Large Scale Global Optimization
October 23, 2009, 12:00am PDT
Green computing, an emerging field of research that seeks to reduce excess power consumption in High Performance Computing (HPC), is gaining popularity among researchers. Research in this field...
Provided by Virginia Polytechnic Institute and State University
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White Papers
On the Maximum Sum-Rate of Cognitive MIMO Interference Channels
October 23, 2010, 12:00am PDT
In this paper, the authors address the problem of maximizing the ergodic sum-rate of an N-user cognitive MIMO Interference Channel (IC) formed by unlicensed (or secondary) users. They assume that...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Efficient OFDM Denial: Pilot Jamming and Pilot Nulling
February 12, 2011, 12:00am PST
Orthogonal Frequency Division Multiplexing (OFDM) uses pilot tones to estimate the channel's frequency response and perform equalization. It is commonly known that jamming pilot tones is more...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Performance Analysis of Cooperative Communication for Wireless Networks
December 8, 2006, 12:00am PST
The demand for access to information when and where one need has motivated the transition of wireless communications from a fixed infrastructure based cellular communications technology to a more...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Is Network Coding Always Good for Cooperative Communications?
May 27, 2010, 12:00am PDT
Network Coding (NC) is a promising approach to reduce time-slot overhead for Cooperative Communications (CC) in a multi-session environment. Most of the existing works take advantage of the...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Optimizing Network-Coded Cooperative Communications Via Joint Session Grouping and Relay Node Selection
January 14, 2011, 12:00am PST
Network-Coded Cooperative Communications (NCCC) is a new paradigm in wireless networks that employs Network Coding (NC) to improve the performance of CC. The core mechanism to harness the benefits...
Provided by Virginia Polytechnic Institute and State University
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White Papers
On Selfishness, Local Information, and Network Optimality: A Topology Control Example
August 3, 2009, 12:00am PDT
Topology control of ad hoc and mesh networks specifies how to assign per-node transmission parameters (such as power level, frequency etc.) so as to achieve energy efficiency, while maintaining...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Impact of Selfish Packet Forwarding on Energy-Efficient Topology Control
January 11, 2008, 12:00am PST
Wireless topology control attempts to harness the programmability of radios to build efficient network structures. This paper addresses energy minimization in an ad hoc network of selfish nodes by...
Provided by Virginia Polytechnic Institute and State University
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White Papers
A Comparison of Channel Assignment Techniques With Power Control in Ad Hoc Networks
August 26, 2009, 12:00am PDT
Multi-channel operation in an ad hoc network can improve robustness and reliability by efficiently managing interference and reducing contention. In this paper, the authors model four dynamic...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Power Spectrum Optimization of Multi-Carrier MIMO Ad Hoc Networks: A Dual Stochastic Approximation Approach
October 9, 2008, 12:00am PDT
Multi-Carrier MIMO (MC-MIMO) has emerged as a promising technology to provide significant capacity gain for broadband wireless ad hoc networks. However, due to the non-convex and large-scale...
Provided by Virginia Polytechnic Institute and State University
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White Papers
A Tractable and Accurate Cross-Layer Model for Multi-Hop MIMO Ad Hoc Networks
August 10, 2009, 12:00am PDT
MIMO-based communications have great potential to improve network capacity for wireless ad hoc networks. Although there has been significant progress on MIMO at the physical layer or single-hop...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Weighted Proportional Fairness Capacity of Gaussian MIMO Broadcast Channels
February 21, 2008, 12:00am PST
Recently, there has been tremendous interest in exploring the capacity region of Multiple-Input Multiple-Output Broadcast Channels (MIMO-BC). However, fairness, a very important performance...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Optimal Downlink Power Allocation and Scheduling for MIMO-Based WiMAX Access Networks
August 31, 2008, 12:00am PDT
Recently, mobile WiMAX equipped with MIMO technology has attracted much attention and has emerged as a leading solution for broadband wireless access networks. However, study on optimal resource...
Provided by Virginia Polytechnic Institute and State University
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White Papers
CFlood: A Constrained Flooding Protocol for Real-Time Data Delivery in Wireless Sensor Networks
August 4, 2009, 12:00am PDT
Real-time performance is critical for many time-sensitive applications of wireless sensor networks. The authors present a constrained flooding protocol, called CFlood that enhances the deadline...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Analyzing Wireless LAN Security Overhead
April 17, 2006, 12:00am PDT
Wireless Local Area Networks (WLAN) are beginning to play a much larger role in corporate network environments and are already very popular for home networking applications. This increase in...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Effect of MAI and Frequency Offset on the Performance of Coded MC-CDMA Synchronous Downlink Systems With MSK Modulation
July 23, 2007, 12:00am PDT
Effects of Multiple Access Interference (MAI) and frequency offset on Bit Error Rate (BER) performance of synchronous Coded Minimum Shift Keying/ Multi-Carrier Code Division Multiple Access...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Performance Comparison of Differential and Non-Differential Synchronous Downlink MC-CDMA Systems With Random Spreading
June 26, 2007, 12:00am PDT
The BER performances of differential and non-differential synchronous downlink Multi-Carrier Code Division Multiple Access (MC-CDMA) systems that employ random spreading are studied and compared...
Provided by Virginia Polytechnic Institute and State University
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Software
Hokie Mobile 1.2 (Mobile)
September 16, 2010, 12:00am PDT
Hokie Mobile is the official iPhone app for Virginia Tech news, information, and online services. Public information such as events, news, campus maps, and directory searches are available to...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Understanding External Firm Factors Impacting Innovation In The Hardwood Veneer Industry
June 1, 2010, 12:00am PDT
Innovation research in the wood products industry has historically focused on factors that the firm can influence or control (i.e. climate for innovation, organizational culture, job satisfaction,...
Provided by Virginia Polytechnic Institute and State University
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Software
CandyFactory Educational Game 1.0 (Mobile)
July 14, 2011, 12:00am PDT
CandyFactory is an educational game that teaches the concept of fractions to middle school students based on splitting operations with partitioning and iterating. It consists of three levels:...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Defense Against Primary User Emulation Attacks in Cognitive Radio Networks
November 3, 2007, 12:00am PDT
Cognitive Radio (CR) is a promising technology that can alleviate the spectrum shortage problem by enabling unlicensed users equipped with CRs to coexist with incumbent users in licensed spectrum...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Mobile Device Profiling and Intrusion Detection Using Smart Batteries
January 8, 2008, 12:00am PST
This paper introduces capabilities developed for a Battery-Sensing Intrusion Protection System (B-SIPS) for mobile computers, which alerts when abnormal current changes are detected. The Intrusion...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Battery-Sensing Intrusion Protection System Validation Using Enhanced Wi-Fi and Bluetooth Attack Correlation
June 22, 2009, 12:00am PDT
This paper discusses mobile device security and extends the original Battery-Sensing Intrusion Protection System (B-SIPS) design by introducing the Multi-Vector Portable - Intrusion Detection...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Effects of Wi-Fi and Bluetooth Battery Exhaustion Attacks on Mobile Devices
September 14, 2009, 12:00am PDT
This paper provides insight into the ramifications of battery exhaustion Denial of Service (DoS) attacks on battery-powered mobile devices. Several IEEE 802.11 Wi-Fi, IEEE 802.15.1 Bluetooth, and...
Provided by Virginia Polytechnic Institute and State University
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White Papers
A Cross-Layer Approach to Multi-Hop Networking With Cognitive Radios
December 30, 2008, 12:00am PST
Cognitive Radio (CR) is an enabling technology for efficient use of available spectrum and promises unprecedented flexibility in multi-hop wireless networking. This paper explores networking...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Achievable Rate Analysis in Network-Coded Cooperative Communications With Multiple Relay Nodes
February 10, 2011, 12:00am PST
Network-Coded Cooperative Communications (NCCC) refers to the use of Network Coding (NC) in Cooperative Communications (CC). Prior studies have shown that NC has the potential to improve the...
Provided by Virginia Polytechnic Institute and State University
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White Papers
On Capacity Scaling Law of Cognitive Radio Ad Hoc Networks
May 12, 2011, 12:00am PDT
Cognitive radio is envisioned to be an enabling radio technology for future wireless networks. In this paper, the authors study the capacity scaling laws for Cognitive Radio ad hoc Networks...
Provided by Virginia Polytechnic Institute and State University
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White Papers
A Distributed Optimization Algorithm for Multi-Hop Cognitive Radio Networks
January 27, 2009, 12:00am PST
Cognitive Radio (CR) is a revolution in radio technology and is viewed as an enabling technology for dynamic spectrum access. This paper investigates how to design distributed algorithm for a...
Provided by Virginia Polytechnic Institute and State University
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White Papers
On Optimal Throughput-Energy Curve for Multi-Hop Wireless Networks
January 11, 2011, 12:00am PST
Network throughput and energy consumption are two important performance metrics for a multi-hop wireless network. Current state-of-the-art is limited to either maximizing throughput under some...
Provided by Virginia Polytechnic Institute and State University
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White Papers
An Optimal Link Layer Model for Multi-Hop MIMO Networks
May 26, 2011, 12:00am PDT
The rapid advances of MIMO to date have mainly stayed at the physical layer. Such fruits have not been fully benefited at the network layer mainly due to the computational complexity associated...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Two Phase Spectrum Sharing for Frequency-Agile Radio Networks
September 26, 2008, 12:00am PDT
Modern frequency-agile radios are capable of dynamically changing the spectrum width and central frequency of its channels. Existing spectrum sharing algorithms often fail to exploit this...
Provided by Virginia Polytechnic Institute and State University
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White Papers
How Much Improvement Can We Get From Partially Overlapped Channels?
January 4, 2008, 12:00am PST
Partially Overlapped Channel (POC) based design, has been identified recently as a promising technique to overcome the capacity bottleneck facing wireless engineers in various networks, such as...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Iterative Image Coding Using Hybrid Wavelet-Based Triangulation
October 6, 2006, 12:00am PDT
This paper presents a novel hierarchical subdivision scheme for generating triangular meshes to represent intensity images. The resulting representation is well suited to content-based management...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Designing an Error Metric for Super-Resolution Enhanced IR Passive Ranging
April 23, 2007, 12:00am PDT
Assessment of image resolution enhancement on range estimation using stereo vision systems provides valuable insight to the design and feasibility of advanced passive ranging systems. Application...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Link-Layer Traceback in Ethernet Networks
May 4, 2007, 12:00am PDT
The design of the most commonly-used Internet and Local Area Network protocols provide no way of verifying the sender of a packet is who it claims to be. A malicious host can easily launch an...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Segment-Based Channel Assignment in Cognitive Radio Ad Hoc Networks
June 4, 2007, 12:00am PDT
In the Opportunistic Spectrum Sharing (OSS) paradigm, unlicensed users (a.k.a. secondary users) "Opportunistically" operate in fallow licensed spectrum on a non-interference basis to licensed...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Distributed Optimal Contention Window Control for Elastic Traffic in Single Cell Wireless LANs
October 28, 2006, 12:00am PDT
This paper presents a theoretical study on distributed contention window control algorithms for achieving arbitrary bandwidth allocation policies and efficient channel utilization. By modeling...
Provided by Virginia Polytechnic Institute and State University
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White Papers
MAC-Layer Misbehaviors in Multi-Hop Cognitive Radio Networks
July 2, 2006, 12:00am PDT
The Federal Communication Commission (FCC) regulates radio spectrum by applying regulatory paradigms. In the conventional spectrum management paradigm, a group of primary users is given license to...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Ensuring Trustworthy Spectrum Sensing in Cognitive Radio Networks
August 22, 2006, 12:00am PDT
Cognitive Radio (CR) is a promising technology that can alleviate the spectrum shortage problem by enabling unlicensed users equipped with CRs to coexist with incumbent users in licensed spectrum...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Defense Against Routing Disruption Attacks in Mobile Ad Hoc Networks
August 28, 2006, 12:00am PDT
The authors propose a secure routing architecture for Mobile Ad hoc NETworks (MANETs) called ThroughpUt-Feedback (TUF) routing, which is resilient against a wide range of routing disruption...
Provided by Virginia Polytechnic Institute and State University
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White Papers
Stasis Trap: Cross-Layer Stealthy Attacks in Wireless Ad Hoc Networks
August 29, 2006, 12:00am PDT
Denial-of-Service (DoS) attacks pose a major threat to the availability of wireless ad hoc networks. Fault tolerant operation of wireless ad hoc networks will depend on the placement of DoS...
Provided by Virginia Polytechnic Institute and State University
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