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University of California
(1028 results)-
White Papers
MIMO and TCP: A Case for Cross Layer Design
August 24, 2007, 12:00am PDT
TCP has not fared well in wireless ad hoc networks. Even in a perfectly static network, there is the problem of throughput degradation due to the interference between flows, which becomes more...
Provided by University of California
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White Papers
Static Enforcement of Web Application Integrity Through Strong Typing
June 2, 2009, 12:00am PDT
Security vulnerabilities continue to plague web applications, allowing attackers to access sensitive data and co-opt legitimate web sites as a hosting ground for malware. Accordingly, researchers...
Provided by University of California
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White Papers
Reducing Errors in the Anomaly-Based Detection of Web-Based Attacks Through the Combined Analysis of Web Requests and SQL Queries
February 20, 2008, 12:00am PST
Web-based applications have become a popular means of exposing functionality to large numbers of users by leveraging the services provided by web servers and databases. The wide proliferation of...
Provided by University of California
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White Papers
A Smart Sensor Web for Ocean Observation: System Design, Architecture, and Performance
May 18, 2007, 12:00am PDT
Much of the cost and effort of new ocean observatories will be in the infrastructure that directly supports sensors, such as moorings and mobile platforms, which in turn connect to a "Backbone"...
Provided by University of California
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White Papers
Line and Lattice Networks Under Deterministic Interference Models
September 30, 2010, 12:00am PDT
Capacity bounds are compared for four different deterministic models of wireless networks, representing four different ways of handling broadcast and superposition in the physical layer. In...
Provided by University of California
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White Papers
Leveraging Social Contacts for Message Confidentiality in Delay Tolerant Networks
April 29, 2009, 12:00am PDT
Delay- and Disruption-Tolerant Networks (DTNs) can bring much-needed connectivity to rural areas and other settings with limited or non-existing infrastructures. High node mobility and infrequent...
Provided by University of California
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White Papers
Organizing Large Scale Hacking Competitions
June 23, 2010, 12:00am PDT
Computer security competitions and challenges are a way to foster innovation and educate students in a highly-motivating setting. In recent years, a number of different security competitions and...
Provided by University of California
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White Papers
SCORPION: A Heterogeneous Wireless Networking Testbed
April 28, 2009, 12:00am PDT
During the last decade, the success and popularity of wireless standards such as IEEE 802.11 have drawn the attention of the research community to wireless networks. A great amount of effort has...
Provided by University of California
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White Papers
A Flexible In-Network IP Anonymization Service
February 29, 2012, 12:00am PST
User privacy on the Internet has been an increasing concern in recent years. With the proliferation and sophistication of information services, data mining, and search engines, a simple network...
Provided by University of California
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White Papers
The Case for Using Traffic Forecasting in Schedule-Based Channel Access
September 30, 2010, 12:00am PDT
In this paper, the authors explore the idea of using traffic forecasting to improve the delay performance of a schedule-based medium access control protocol. Schedule-based channel access has been...
Provided by University of California
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White Papers
Collision-Free Asynchronous Multi-Channel Access in Ad Hoc Networks
August 14, 2009, 12:00am PDT
In this paper, the authors present a collision-free asynchronous multi-channel access protocol for Ad Hoc wireless networks using a single transceiver. Their protocol, dubbed AMMAC for...
Provided by University of California
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White Papers
Performance Evaluation of Secure Network Coding Using Homomorphic Signature
May 23, 2011, 12:00am PDT
Network coding has gained significant attention by improving throughput and reliability in disruptive MANETs. Yet, it is vulnerable to attacks from malicious nodes. In order to prevent malicious...
Provided by University of California
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White Papers
Content Distribution in VANETs Using Network Coding: The Effect of Disk I/O and Processing O/H
March 20, 2008, 12:00am PDT
Besides safe navigation (e.g., warning of approaching vehicles), car to car communications will enable a host of new applications, ranging from office-on-the-wheel support to entertainment. One of...
Provided by University of California
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White Papers
Opportunistic Medical Monitoring Using Bluetooth P2P Networks
February 19, 2008, 12:00am PST
Remote medical monitoring using body sensors and wireless communications has been gaining attention recently because of the potential savings in patient care and the equally impressive...
Provided by University of California
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White Papers
Scalable Emulation of TinyOS Applications in Heterogeneous Network Scenarios
September 16, 2009, 12:00am PDT
Simulating the behavior of sensor applications in a heterogeneous network or under diverse environmental conditions is particularly challenging. In this paper, the authors present the design and...
Provided by University of California
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White Papers
Towards Personal Content Networking
August 17, 2011, 12:00am PDT
Recent advances of technology in consumer electronics have promoted a lifestyle where people live with convenience and ease by accessing any kind of information at their finger tips. These devices...
Provided by University of California
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White Papers
ILS: Instant Localization Scheme for Underwater Mobile Networks
October 14, 2011, 12:00am PDT
Mobile underwater networks have recently been proposed as a way to explore and observe the ocean with a wide area coverage at reasonable cost when compared to traditional tethered approaches...
Provided by University of California
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White Papers
Robust MANET Routing Using Adaptive Path Redundancy and Coding
December 10, 2008, 12:00am PST
Providing efficient networking services in MANETs is very challenging in presence of mobility, unpredictable radio channel and interference: a significant number of packets can be corrupted and/or...
Provided by University of California
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White Papers
How to Lower Congestion With Cross-Layer MPR-PHY/MAC Design?
November 6, 2011, 12:00am PDT
In this paper, the authors introduce a cross-layer design between PHY and MAC for Multiple Packet Reception (MPR). Based on the simulation results, three phases of operation has been identified...
Provided by University of California
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White Papers
CLA-MAC: A Cooperative Extension of Load Adaptive MAC Protocol
October 28, 2011, 12:00am PDT
The use of cooperative communications techniques has proven to significantly improve network performance via cooperation among network nodes. In this paper, the authors propose a cooperative...
Provided by University of California
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White Papers
A Case Study of a MIMO SDR Implementation
January 13, 2009, 12:00am PST
Funded by a research contract from the Boeing Company, the authors report on the implementation of a Multiple-Input Multiple-Output (MIMO) Software Defined Radio (SDR) platform forming an...
Provided by University of California
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White Papers
Optimal Audio Transmission Over Wireless Tandem Channels
November 19, 2007, 12:00am PST
In this paper, the authors propose a statistical optimization framework for transmitting audio sequences over wireless links. Their proposed framework protects audio frames against both temporally...
Provided by University of California
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White Papers
An Exact Solution to an Approximated Model of RED
July 23, 2007, 12:00am PDT
In this paper, the authors propose an analytical model to capture the dynamics of the RED algorithm. They first develop a system of recursive equations that describes the packet dropping behavior...
Provided by University of California
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White Papers
Emulation of Fading Wireless Link Effects in NEWS Wired Testbed
August 23, 2007, 12:00am PDT
Currently, under development by the Boeing Company, Network Emulator Wireless Simulator (NEWS) is a wired testbed for evaluating the performance of MANET protocols. In part, NEWS extends the...
Provided by University of California
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White Papers
An Implementation and Experimental Study of the Variable-Structure Congestion Control Protocol (VCP)
August 23, 2007, 12:00am PDT
The Variable-structure Congestion control Protocol (VCP) has been proposed as an alternative approach to the eXplicit Control Protocol (XCP). In the authors' earlier work, they reported the NS2...
Provided by University of California
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White Papers
The Impacts of Physical Layer Parameters on the Connectivity of Ad-Hoc Networks
January 1, 2012, 12:00am PST
The authors study the effects of physical layer parameters on the connectivity of fading wireless ad-hoc networks. Relying on a symbol error rate connectivity metric for wireless ad-hoc networks,...
Provided by University of California
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White Papers
A Constrained Resource Allocation Study for LOS MIMO Fading Ad-Hoc Networks
January 1, 2012, 12:00am PST
The authors study constrained resource allocation problems for MIMO wireless ad-hoc networks under LOS fading. By considering the tradeoff between the aggregate consumed power and throughput of...
Provided by University of California
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White Papers
Mobile Ad Hoc Networks (MANET) Protocols Evaluation Framework
June 29, 2008, 12:00am PDT
The authors propose a novel, robust MANET protocols evaluation framework which enables researchers to track performance metrics and evaluate theoretical predictions. This framework speeds up the...
Provided by University of California
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White Papers
Future Directions in Cognitive Radio Network Research
June 1, 2009, 12:00am PDT
Wireless technology is proliferating rapidly, and the vision of pervasive wireless computing and communications offers the promise of many societal and individual benefits. While consumer devices...
Provided by University of California
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White Papers
Mitigate Funnel Effect in Sensor Networks With Multi-Interface Relay Nodes
February 1, 2012, 12:00am PST
Overlay network architectures that use orthogonal channels have been known to provide effective additional resources to underlying networks in high demand. Overlays are composed of relay nodes...
Provided by University of California
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White Papers
Timely and Robust Key Establishment Under Jamming Attack in Critical Wireless Networks
August 14, 2011, 12:00am PDT
Jamming attacks are security threats disrupting RF communications in wireless networks. Traditionally, spread spectrum has been proposed as a countermeasure. However, spread spectrum requires...
Provided by University of California
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White Papers
MPR-Aware Performance Improvement for Inter-Domain Routing in MANETs
August 13, 2011, 12:00am PDT
Inter-domain routing for MANETs (Mobile Ad Hoc NETworks) draws increasing attention in military and civil application. It works on heterogeneous networking protocols, including different MAC layer...
Provided by University of California
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White Papers
Primary User Traffic Estimation for Dynamic Spectrum Access
March 12, 2012, 12:00am PDT
Accurate estimation of licensed channel Primary User's (PU) temporal statistics is important for Dynamic Spectrum Access (DSA) systems. With accurate estimation of the mean duty cycle, u, and the...
Provided by University of California
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White Papers
Wireless Network Utility Maximization
October 8, 2008, 12:00am PDT
The authors describe Wireless Network Utility Maximization, WNUM, and compare its performance to traditional NUM along the dimensions of rate, delay and reliability under flat fading. Both coded...
Provided by University of California
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White Papers
Optimization of Transmission Strategies for Opportunistic Access in Cognitive Radio Networks
March 14, 2008, 12:00am PDT
Cognitive radio is a promising technology to mitigate spectrum shortage in wireless communications. It enables Secondary Users (SUs) to opportunistically access low-occupancy primary spectral...
Provided by University of California
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White Papers
Alleviate Cellular Congestion Through Opportunistic Through Filling
December 19, 2011, 12:00am PST
The demand for cellular data service has been skyrocketing since the debut of data-intensive smart phones and touch-pads. However, not all data are created equal. Many popular applications on...
Provided by University of California
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White Papers
PACE Yourself: Power Aware Collaborative Execution on Mobile Phones
December 11, 2009, 12:00am PST
In this paper, the authors propose a framework for Power Aware Collaborative Execution (PACE) for mobile phones. Mobile phones have scarce resources, such as battery power and bandwidth. In the...
Provided by University of California
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White Papers
Network Coding-Aware Queue Management for Unicast Flows Over Coded Wireless Networks
April 9, 2010, 12:00am PDT
The authors are interested in unicast flows over wireless networks with intersession network coding (such as COPE). TCP flows over coded wireless networks do not fully exploit network coding...
Provided by University of California
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White Papers
Network Coding-Aware Rate Control and Scheduling in Wireless Networks
March 2, 2009, 12:00am PST
Network coding has been recently applied to wireless networks to increase throughput. It is typically implemented as a thin layer between MAC and IP, transparently to higher layers. In this paper,...
Provided by University of California
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White Papers
On Detecting Pollution Attacks in Inter-Session Network Coding
January 12, 2012, 12:00am PST
Network coding involves packets being combined at intermediate nodes inside the network. Depending on whether packets from the same or different sessions are combined, network coding is classified...
Provided by University of California
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White Papers
TCP Performance in Wireless Multi-Hop Networks
November 6, 2007, 12:00am PST
In recent years, wireless networks have become increasingly common and an increasing number of devices are communicating with each other over lossy links. Unfortunately, TCP performs poorly over...
Provided by University of California
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White Papers
Optical Label Switching Technology and Energy-Efficient Future Networks
September 1, 2009, 12:00am PDT
The future Internet is rapidly emerging with a new set of very challenging requirements. It must support exponentially rising traffic volume with scalability, performance, and low power...
Provided by University of California
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White Papers
Exploring Uncertainty Visualization in Large Data Sets
March 16, 2008, 12:00am PDT
This is a proposal to renew and extend the current project with LANL on uncertainty visualization of large data sets. The size of the data sets and the uncertainty in the data sets come from the...
Provided by University of California
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White Papers
DMesh: A Diagonally-Linked Mesh Network-on-Chip Architecture
October 10, 2008, 12:00am PDT
This paper proposes a new mesh-typed NoC architecture which aims at enhancing network performance while keeping implementation cost feasible. The result is a Diagonally-linked mesh (DMesh) NoC...
Provided by University of California
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White Papers
A Multi-Radio 802.11 Mesh Network Architecture
January 1, 2010, 12:00am PST
Routers equipped with multiple 802.11 radios can alleviate capacity problems in wireless mesh networks. However, a practical, complete system architecture that can realize the benefits of multiple...
Provided by University of California
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White Papers
Network Architecture, Salience and Coordination
November 19, 2008, 12:00am PST
This paper reports the results of an experimental investigation of monotone games with imperfect information. Players are located at the nodes of a network and observe the actions of other players...
Provided by University of California
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White Papers
Autonomous Network Management Using Cooperative Learning for Network-Wide Load Balancing in Heterogeneous Networks
August 14, 2008, 12:00am PDT
Traditional hop-by-hop dynamic routing makes inefficient use of network resources as it forwards packets along already congested shortest paths while uncongested longer paths may be underutilized....
Provided by University of California
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White Papers
Automated Spyware Collection and Analysis
August 18, 2009, 12:00am PDT
Various online studies on the prevalence of spyware attest overwhelming numbers (up to 80%) of infected home computers. How-ever, the term spyware is ambiguous and can refer to anything from...
Provided by University of California
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White Papers
Skeleton-Based Data Compression for Multi-Camera Tele-Immersion System
March 14, 2008, 12:00am PDT
Image-based full body 3D reconstruction for tele-immersive applications generates large amount of data points, which have to be sent through the network in real-time. This paper introduces a...
Provided by University of California
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White Papers
Power Efficiency With Correlated Data Compression in Sensor Networks
February 19, 2010, 12:00am PST
One of the main constraints for wireless sensor networks is its power budget, which creates a tradeoff on the amount of data the sensor network can transmit and the amount of time that it is...
Provided by University of California
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White Papers
Error-Resilient LZW Data Compression
January 1, 2010, 12:00am PST
As many practitioners know, compressed streams are very sensitive the transmission errors. Even a single error can have devastating effects and compromise all the data downstream. In fact, the...
Provided by University of California
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White Papers
Multimodal Visualization of DTI and FMRI Data Using Illustrative Methods
April 17, 2009, 12:00am PDT
Designing multimodal visualizations combining anatomical and functional brain data is a demanding task. Jainek et al. applied illustrative rendering techniques to obtain a high-quality...
Provided by University of California
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White Papers
HiperSense: An Integrated System for Dense Wireless Sensing and Massively Scalable Data Visualization
September 11, 2009, 12:00am PDT
HiperSense is a system for sensing and data visualization. Its sensing part is comprised of a heterogeneous Wireless Sensor Network (WSN) as enabled by infrastructure support for handoff and...
Provided by University of California
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White Papers
Visualizing Industrial CT Volume Data for Nondestructive Testing Applications
January 1, 2010, 12:00am PST
This paper describes a set of techniques developed for the visualization of high-resolution volume data generated from industrial computed tomography for NonDestructive Testing (NDT) applications....
Provided by University of California
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White Papers
Frequency Enhancements for Visualizing 3D Seismic Data
March 30, 2009, 12:00am PDT
This application paper introduces a suite of enhancement techniques for visualizing seismic data. These techniques provide a better understanding of the underlying propagation process in the...
Provided by University of California
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White Papers
The Turnip: Visualizing Statistical Data Cleaning
December 18, 2008, 12:00am PST
Databases with measured or humanly entered data can be full of erroneous data that regular statistical methods are created around, but solutions can be time consuming and the data can be difficult...
Provided by University of California
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White Papers
VrtProf: Vertical Profiling for System Virtualization
September 14, 2009, 12:00am PDT
As data centers and end users become increasingly reliant on virtualization technology, more efficient and accurate methods of profiling such systems are needed. However, under virtualization the...
Provided by University of California
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White Papers
Extending Networking Into the Virtualization Layer
October 1, 2009, 12:00am PDT
The move to virtualization has created a new network access layer residing on hosts that connects the various VMs. Virtualized deployment environments impose requirements on networking for which...
Provided by University of California
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White Papers
Secure Content Sniffing for Web Browsers, or How to Stop Papers From Reviewing Themselves
March 7, 2009, 12:00am PST
Cross-site scripting defenses often focus on HTML documents, neglecting attacks involving the browser's content-sniffing algorithm, which can treat non-HTML content as HTML. Web applications, such...
Provided by University of California
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White Papers
Cross-Origin JavaScript Capability Leaks: Detection, Exploitation, and Defense
May 18, 2009, 12:00am PDT
This paper identifies a class of Web browser implementation vulnerabilities, cross-origin JavaScript capability leaks, which occur when the browser leaks a JavaScript pointer from one security...
Provided by University of California
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White Papers
Protecting Browsers From Extension Vulnerabilities
December 8, 2009, 12:00am PST
Browser extensions are remarkably popular, with one in three Firefox users running at least one extension. Although well-intentioned, extension developers are often not security experts and write...
Provided by University of California
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White Papers
Password Based Login
January 1, 2009, 12:00am PST
As an introduction to security and cryptography, lets look at something it does extensively, namely to authenticate ourselves using passwords. It considers a computer on which many different...
Provided by Regents of the University of California
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White Papers
Automated Worm Fingerprinting
January 1, 2009, 12:00am PST
This paper proposes an automated approach for quickly detecting previously unknown worms and viruses based on two key behavioral characteristics a common exploit sequence together with a range of...
Provided by University of California
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White Papers
Defending Mobile Phones From Proximity Malware
January 21, 2009, 12:00am PST
As mobile phones increasingly become the target of propagating malware, their use of direct pair-wise communication mechanisms, such as Bluetooth and WiFi, pose considerable challenges to malware...
Provided by University of California
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White Papers
Optimizing Interval Training Protocols Using Data Mining Decision Trees
May 8, 2009, 12:00am PDT
Interval training consists of interleaving high intensity exercises with rest periods. This training method is a well known exercise protocol which helps strengthen and improve one's...
Provided by University of California
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White Papers
Optimal MAC Protocol Formulation for Wireless Sensor Networks
September 28, 2007, 12:00am PDT
With the research interest in Wireless Sensor Networks (WSN) increasing, many Medium Access Control (MAC) protocols have been developed as a means to maximize the performance of WSN's. However,...
Provided by University of California
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White Papers
Softspeak: Making VoIP Play Well in Existing 802.11 Deployments
February 27, 2009, 12:00am PST
Voice over IP (VoIP) in 802.11 Wireless Networks (WiFi) is an attractive alternative to cellular wireless telephony. Unfortunately, VoIP traffic is well known to make inefficient use of such...
Provided by University of California
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White Papers
Low-Complexity, High-Throughput Multiple-Access Wireless Protocol for Body Sensor Networks
March 14, 2009, 12:00am PDT
Wireless systems that form a body-area network must be made small and low power without sacrificing performance. To achieve high-throughput communication in low-cost wireless body area networks,...
Provided by University of California
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White Papers
Soft-TDMAC: A Software TDMA-Based MAC Over Commodity 802.11 Hardware
January 15, 2009, 12:00am PST
This paper designs and implements Soft-TDMAC, a software Time Division Multiple Access (TDMA) based MAC protocol, running over commodity 802.11 hardware. Soft-TDMAC has a synchronization...
Provided by University of California
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White Papers
A Real-Time Traffic Packet Scheduler for a Novel TDMA MAC Protocol
June 12, 2008, 12:00am PDT
Wireless mesh networks are being rapidly deployed in both urban and rural areas impacting a large fraction of the world's population. As the profile of the average user changes so does the...
Provided by University of California
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White Papers
Near-Optimal Radio Use for Wireless Network Synchronization
June 30, 2009, 12:00am PDT
This paper considers the model of communication where wireless devices can either switch their radios o to save energy (and hence, can neither send nor receive messages), or switch their radios on...
Provided by University of California
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White Papers
Re-Assessing Long Distance Wireless for West Africa
January 25, 2009, 12:00am PST
This paper describes the experiences deploying long distance, point-to-point WiFi links in Ghana and Guinea Bissau, focusing on several challenges that are somewhat unique to these countries and...
Provided by University of California
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White Papers
Scheduling Heterogeneous Wireless Systems for Efficient Spectrum Access
September 30, 2009, 12:00am PDT
The spectrum scarcity problem emerged in recent years, due to unbalanced utilization of RF (Radio Frequency) bands in the current state of wireless spectrum allocations. Different from cognitive...
Provided by University of California
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White Papers
ElasTraS: An Elastic Transactional Data Store in the Cloud
May 25, 2009, 12:00am PDT
Over the last couple of years, "Cloud Computing" or "Elastic Computing" has emerged as a compelling and successful paradigm for internet scale computing. One of the major contributing factors to...
Provided by University of California
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White Papers
Above the Clouds: A Berkeley View of Cloud Computing
February 10, 2009, 12:00am PST
Cloud Computing, the long-held dream of computing as a utility, has the potential to transform a large part of the IT industry, making software even more attractive as a service and shaping the...
Provided by University of California
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White Papers
A Mobile-Agent Based Wireless Sensing Network for Structural Monitoring Applications
December 19, 2008, 12:00am PST
A new wireless sensing network paradigm is presented for structural monitoring applications. In this approach, both power and data interrogation commands are conveyed via a mobile-agent that is...
Provided by University of California
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White Papers
Implementation and Evaluation of a Mobile Wireless PlanetLab Node
August 18, 2009, 12:00am PDT
With the introduction of cellular phones, mobile wireless communication has become an integral part of day-to-day life in this century. A testbed is crucial in continuing cutting-edge wireless...
Provided by University of California
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White Papers
Energy Maps for Mobile Wireless Networks: Coherence Time Versus Spreading Period
January 20, 2009, 12:00am PST
This paper shows that even though mobile networks are highly unpredictable when viewed at the individual node scale, the end-to-end Quality-of-Service (QoS) metrics can be stationary when the...
Provided by University of California
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White Papers
MapScale: A Cloud Environment for Scientific Computing
June 12, 2009, 12:00am PDT
Parallel programming languages have sought out many different means by which many numbers of cores can be utilized for a common goal. Programming languages such as MPI provide a low-level, message...
Provided by University of California
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White Papers
The Eucalyptus Open-Source Cloud-Computing System
August 16, 2008, 12:00am PDT
Cloud computing systems fundamentally provide access to large amounts of data and computational resources through a variety of interfaces. Many extant systems have in common the notion that...
Provided by University of California
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