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University of Illinois at Urbana-Champaign
(507 results)-
White Papers
Reliability and Route Diversity in Wireless Networks
October 1, 2008, 12:00am PDT
The authors study the problem of communication reliability of wireless networks in a fading environment based on the outage probability formulation. The exact expression for the disconnect...
Provided by University of Illinois
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White Papers
Reciprocity in Linear Deterministic Networks Under Linear Coding
July 9, 2009, 12:00am PDT
The linear deterministic model has been used recently to get a first order understanding of many wireless communication network problems. In many of these cases, it has been pointed out that the...
Provided by University of Illinois
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White Papers
An Overview of Data Aggregation Architecture For1 Real-Time Tracking With Sensor Networks
January 1, 2011, 12:00am PST
Since sensor nodes normally have limited resources in terms of energy, bandwidth and computation capability, efficiency is a key design goal in sensor network research. As one of techniques to...
Provided by University of Illinois
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White Papers
The Open Cloud Testbed: A Wide Area Testbed for Cloud Computing Utilizing High Performance Network Services
July 28, 2009, 12:00am PDT
Recently, a number of cloud platforms and services have been developed for data intensive computing, including Hadoop, Sector, CloudStore (formerly KFS), HBase, and Thrift. In order to benchmark...
Provided by University of Illinois
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White Papers
Optimal Scheduling for Fair Resource Allocation in Ad Hoc Networks With Elastic and Inelastic Traffic
December 13, 2009, 12:00am PST
This paper studies the problem of congestion control and scheduling in ad hoc wireless networks that have to support a mixture of best-effort and real-time traffic. Optimization and stochastic...
Provided by University of Illinois
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White Papers
CPU Gradients: Performance-Aware Energy Conservation in Multitier Systems
August 8, 2010, 12:00am PDT
Dynamic Voltage and Frequency Scaling (DVFS) and Virtual Machine (VM) based server consolidation are well known CPU scaling techniques for energy conservation that can have an adverse impact on...
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White Papers
Routing Tables: Is Smaller Really Much Better?
October 15, 2009, 12:00am PDT
The authors examine the case for small Internet routing and forwarding tables in the context of router design. If Moore's Law drives cost effective scaling of hardware performance in excess of the...
Provided by University of Illinois
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White Papers
DeLorean: Recording and Deterministically Replaying Shared-Memory Multiprocessor Execution Efficiently
March 26, 2008, 12:00am PDT
Support for deterministic replay of multithreaded execution can greatly help in finding concurrency bugs. For highest effectiveness, replay schemes should record at production-run speed, keep...
Provided by University of Illinois
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White Papers
Securing Vehicular Networks With VIBES
March 30, 2010, 12:00am PDT
One of the biggest challenges in making vehicular networks a reality is security. Aside from the clear need for vehicles to be able to authenticate messages from certain personnel, such as police...
Provided by University of Illinois
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White Papers
Reliability Trade-Off Analysis of Deadline-Sensitive Wireless Messaging Systems
March 21, 2011, 12:00am PDT
The need for deadline-sensitive messaging systems is growing fast with the growth in the number of mobile and static devices communicating with each other. With many such devices from different...
Provided by University of Illinois
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White Papers
Security Through Amnesia: A Software-Based Solution to the Cold Boot Attack on Disk Encryption
April 23, 2011, 12:00am PDT
Disk encryption has become an important security measure for a multitude of clients, including governments, corporations, activists, security-conscious professionals, and privacy-conscious...
Provided by University of Illinois
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White Papers
Using the High Productivity Language Chapel to Target GPGPU Architectures
April 25, 2011, 12:00am PDT
It has been widely shown that GPGPU architectures offer large performance gains compared to their traditional CPU counterparts for many applications. The downside to these architectures is that...
Provided by University of Illinois
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White Papers
WCET-Aware Optimization of Shared Cache Partition and Bus Arbitration for Hard Real-Time Multicore Systems
May 1, 2011, 12:00am PDT
In recent years, multicore processors have been receiving a significant amount of attention from avionic and automotive industries as the demand for high-end real-time applications drastically...
Provided by University of Illinois
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White Papers
iShare: Exploiting Opportunistic Ad Hoc Connections for Improving Data Download of Cellular Users
December 6, 2008, 12:00am PST
This paper presents an Incentive-based Sharing (iShare) protocol that blends cellular and ad hoc networks for content dissemination services. With iShare, mobile users download content from a...
Provided by University of Illinois
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White Papers
Runtime Verification of C Memory Safety
March 30, 2009, 12:00am PDT
C is the most widely used imperative system's implementation language. While C provides types and high-level abstractions, its design goal has been to provide highest performance which often...
Provided by University of Illinois
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White Papers
Effective Ranking of XML Keyword Search Results (Extended Version)
March 19, 2009, 12:00am PDT
The popularity of XML has exacerbated the need for an easy-to-use, high precision query interface for XML data. When traditional document-oriented keyword search techniques do not suffice, natural...
Provided by University of Illinois
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White Papers
Cross-Layer Quality Assessment of Wireless Video Transmission Over Mobile Broadcast Networks
March 16, 2009, 12:00am PDT
The recent development of high-speed data transmission over wireless cellular networks has enabled the delivery of multimedia broadcasting services to mobile users. These services involve a range...
Provided by University of Illinois
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White Papers
Preventing History Forgery With Secure Provenance
May 24, 2009, 12:00am PDT
As increasing amounts of valuable information are produced and persist digitally, the ability to determine the origin of data becomes important. In science, medicine, commerce, and government,...
Provided by University of Illinois
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White Papers
Applying the Theory of Task-Technology Fit to Mobile Technology: The Role of User Mobility
August 27, 2007, 12:00am PDT
In this paper, the authors apply the theory of task technology fit to mobile technology, focusing specifically on the role of user mobility. They describe the results of an empirical study of 216...
Provided by University of Illinois at Urbana-Champaign
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White Papers
Confluence: A System for Lossless Multi-Source Single-Sink Data Collection
April 27, 2009, 12:00am PDT
Distributed environments often require collection of large amounts of critical and raw data from multiple locations to a central clearinghouse, e.g., task results or large datasets from multiple...
Provided by University of Illinois
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White Papers
An Adaptive-Reliability Cyber-Physical Transport Protocol for Spatio-Temporal Data
May 26, 2009, 12:00am PDT
In this paper, the authors propose a new transport protocol for data collection in sensor networks that monitor physical phenomena. In a network with variable channel condition, this protocol...
Provided by University of Illinois
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White Papers
Types, Regions, and Effects for Safe Programming With Object-Oriented Parallel Frameworks
September 8, 2009, 12:00am PDT
Object-oriented frameworks can make parallel programming easier by providing generic parallel algorithms such as map, reduce, or scan, and letting the user fill in the details with sequential...
Provided by University of Illinois
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White Papers
An Adaptive Content Distribution Protocol for Clustered Mobile Peer-to-Peer Networks
September 28, 2009, 12:00am PDT
In this paper, the authors show that the clustered mobile Peer-To-Peer (P2P) networks exist in numerous scenarios where mobile users collaborate to improve content distribution services. In order...
Provided by University of Illinois
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White Papers
Alibi: A Framework for Identifying Insider-Based Jamming Attacks in Multi-Channel Wireless Networks
July 31, 2009, 12:00am PDT
The authors consider the problem of identifying the insider-based attacks in the form of jammers in multi-channel wireless networks, where jammers have the inside knowledge of frequency hopping...
Provided by University of Illinois
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White Papers
Identifying Malicious Nodes in Network-Coding-Based Peer-to-Peer Streaming Networks
August 1, 2009, 12:00am PDT
Researchers show that network coding can greatly improve the quality of service in P2P live streaming systems (e.g., IPTV). However, network coding is vulnerable to pollution attacks where...
Provided by University of Illinois
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White Papers
Troubleshooting Interactive Complexity Bugs in Wireless Sensor Networks Using Data Mining Techniques
September 20, 2010, 12:00am PDT
This paper presents a tool for uncovering bugs due to interactive complexity in networked sensing applications. Such bugs are not localized to one component that is faulty, but rather result from...
Provided by University of Illinois
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White Papers
Denial in DTNs
January 19, 2010, 12:00am PST
Disruption-Tolerant Network (DTN) is an intermittently connected network where the traditional end-to-end data communication between a source-destination pair is hardly possible. Instead, nodes...
Provided by University of Illinois
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White Papers
A Scalable Distributed File System for Cloud Computing
March 16, 2010, 12:00am PDT
Large scale distributed systems such as cloud computing applications are becoming very common. These applications come with increasing challenges on how to transfer and where to store and compute...
Provided by University of Illinois
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White Papers
Exploiting Joint Wifi/Bluetooth Trace to Predict People Movement
August 22, 2010, 12:00am PDT
It is well known that the daily movement of people exhibits a high degree of repetition in which people usually stay at regular places for their daily activities. This paper presents a novel...
Provided by University of Illinois
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White Papers
Resource Inflation Threats to Denial of Service Countermeasures
October 26, 2010, 12:00am PDT
Currency-based mechanisms have been proposed as a way to use resource fairness among contenders for a service to thwart Denial of Service (DoS) attacks. Under resource fairness, a server allocates...
Provided by University of Illinois
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White Papers
Social Network-Aware Disk Management
November 24, 2010, 12:00am PST
Disk access patterns of social networking applications are different from those of traditional applications. However, today's disk layout techniques are not adapted to social networking workloads...
Provided by University of Illinois
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White Papers
Dynamic Mapping of an as Network Into a Smaller Network of Border Routers
December 12, 2010, 12:00am PST
In this paper the authors present a cross layer routing and congestion control scheme which can map an enterprise network into a smaller network of boarder routers. One of the boarder routers in...
Provided by University of Illinois
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White Papers
Integrating Dynamic Power Management in Systems With Multiple DVS Components
January 26, 2011, 12:00am PST
Recent embedded computing platforms offer multiple independent clocks for different components involved in processing a single instruction stream, such as CPU and memory, giving rise to a new...
Provided by University of Illinois
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White Papers
Coordinating the Interplay Between Physical Carrier Sense and Power Control in CSMA/CA Wireless Networks
July 31, 2007, 12:00am PDT
The transmit power and the carrier sense threshold are two major MAC/PHY parameters in CSMA/CA wireless networks. The problem of transmit power control has been extensively studied in the context...
Provided by University of Illinois
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White Papers
Optimization Strategies for QoS-Sensitive VOD Service Delivery in Cooperative Environments
July 31, 2007, 12:00am PDT
Multimedia services such as video-on-demand service to large number of clients requires stable network bandwidth provision and short network delay. In order to achieve these goals, the object...
Provided by University of Illinois
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White Papers
Bulk Operation and Data Coloring for Multiprocessor Programmability
August 1, 2007, 12:00am PDT
With ubiquitous multi-core architectures, a major challenge is how to effectively use these machines. Writing parallel programs is usually very complex and error-prone. Hence, improving the...
Provided by University of Illinois
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White Papers
Quality of Authentication in Ad Hoc Networks
August 6, 2007, 12:00am PDT
With the emergence of ad hoc networking technology came efforts to provide necessary security support for ad hoc networks. However, due to challenging characteristics of ad hoc environments,...
Provided by University of Illinois
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White Papers
Envirosuite: An Environmentally-Immersive Programming Framework for Wireless Sensor Networks
August 20, 2007, 12:00am PDT
Networked, embedded sensors allow for an instrumentation of the physical world at unprecedented granularities and from unimagined perspectives. The advent of a ubiquitous sensing era is evident....
Provided by University of Illinois
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White Papers
Performance Aware Energy Efficient Storage Systems
August 10, 2007, 12:00am PDT
Trends in Internet infrastructure are driving towards using data centers to provide services such as web hosting and outsourced storage. Data centers typically have high power requirements and may...
Provided by University of Illinois
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White Papers
Urban Wireless Mesh Network Planning: The Case of Directional Antennas
June 1, 2007, 12:00am PDT
As more and more cities plan to deploy municipal wireless mesh networks to provide publicly-accessible infrastructure, it becomes critical to come up with a deployment plan that provides...
Provided by University of Illinois
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White Papers
User Requirements of Mobile Technology - Results From a Content Analysis of User Reviews
October 15, 2007, 12:00am PDT
Advanced mobile technology continues to shape professional environments. Smart cell phones, pocket computers and laptop computers reduce the need of users to remain close to a wired information...
Provided by University of Illinois at Urbana-Champaign
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White Papers
User Requirements of Mobile Technology: A Summary of Research Results
March 8, 2008, 12:00am PST
As advanced mobile technology becomes more widespread, the impacts on professional environments and on the personal lives of individual users continue to increase. Devices, such as smart cell...
Provided by University of Illinois at Urbana-Champaign
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White Papers
User-perceived Requirements of Mobile Technology: Results From a Survey of Mobile Business Users
November 8, 2007, 12:00am PST
In this paper, the authors explore the requirements of business users of mobile devices in relation with user tasks and user mobility, and the relationship of the extent to which user-indicated...
Provided by University of Illinois at Urbana-Champaign
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White Papers
Medium Access Control and Routing Protocols for Wireless Mesh Networks
April 3, 2008, 12:00am PDT
Wireless Mesh Networks (WMNs), a.k.a. community wireless networks, have emerged to be a new cost-effective and performance-adaptive network paradigm for the next-generation wireless Internet....
Provided by University of Illinois
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White Papers
Adaptive Carrier Sense With Enhanced Fairness in IEEE 802.15.4 Wireless Networks
March 20, 2009, 12:00am PDT
The authors propose an adaptive Carrier Sense (CS) scheme with enhanced fairness based on the observation that conventional adaptive CS mechanisms may lead to significant unfairness. Their...
Provided by University of Illinois at Urbana-Champaign
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White Papers
Dynamic Spectrum Access With Learning for Cognitive Radio
November 23, 2008, 12:00am PST
The authors study the problem of cooperative dynamic spectrum sensing and access in cognitive radio systems as a Partially Observed Markov Decision Process (POMDP). Assuming Markovian...
Provided by University of Illinois at Urbana-Champaign
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White Papers
Statistical Guarantees of Performance for MIMO Designs
September 10, 2009, 12:00am PDT
Sources of noise such as quantization, introduce randomness into Register Transfer Level (RTL) designs of Multiple Input Multiple Output (MIMO) systems. Performance of these MIMO RTL designs is...
Provided by University of Illinois at Urbana Champaign
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White Papers
Detection and Handling of MAC Layer Misbehavior in Wireless Networks
January 1, 2011, 12:00am PST
Wireless Medium Access Control (MAC) protocols such as IEEE 802.11 use distributed contention resolution mechanisms for sharing the wireless channel. In this environment, selfish hosts that fail...
Provided by University of Illinois at Urbana-Champaign
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White Papers
MalStone: Towards a Benchmark for Analytics on Large Data Clouds
July 7, 2010, 12:00am PDT
Developing data mining algorithms that are suitable for cloud computing platforms is currently an active area of research, as is developing cloud computing platforms appropriate for data mining....
Provided by University of Illinois
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White Papers
Estimating The Intrinsic Value Of An Enterprise With An Integrated Financial Management System
November 30, 2007, 12:00am PST
Learning the process of estimating the intrinsic value of an enterprise can be extremely frustrating to students because it involves a deep understanding of numerous complex relationships. The...
Provided by University of Illinois
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White Papers
Joint Resource Allocation and Admission Control in Wireless Mesh Networks
May 1, 2009, 12:00am PDT
Many next generation applications (such as video flows) are likely to have associated minimum data rate requirements to ensure satisfactory quality as perceived by end-users. While there have been...
Provided by University of Illinois
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White Papers
Fair K Mutual Exclusion Algorithm for Peer to Peer Systems
March 23, 2008, 12:00am PDT
k-mutual exclusion is an important problem for resource-intensive peer-to-peer applications ranging from aggregation to file download. In order to be practically useful, k-mutual exclusion...
Provided by University of Illinois
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White Papers
Using Tractable and Realistic Churn Models to Analyze Quiescence Behavior of Distributed Protocols
July 24, 2008, 12:00am PDT
Large-scale distributed systems are subject to churn, i.e., continuous arrival, departure and failure of processes. Analysis of protocols under churn requires one to use churn models that are...
Provided by University of Illinois
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White Papers
MOve: Design of an Application-Malleable Overlay
January 1, 2011, 12:00am PST
Peer-to-peer overlays allow distributed applications to work in a wide-area, scalable, and fault-tolerant manner. However, most structured and unstructured overlays present in literature today are...
Provided by University of Illinois
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White Papers
Impact of Mismatched Statistics on Correlated Mimo Capacity
October 6, 2007, 12:00am PDT
Many recent works that study the impact of spatial correlation on the performance of Multi-Input Multi-Output (MIMO) systems assume a separable (also known as the Kronecker) model where the...
Provided by University of Illinois
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White Papers
Quickest Detection of a Change Process Across a Sensor Array
May 12, 2008, 12:00am PDT
Recent attention in quickest change detection in a multi-sensor scenario has been on the case where the densities of the observations at all the sensors change instantaneously at the time of...
Provided by University of Illinois
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White Papers
Angular Domain Processing for MIMO Wireless Systems With Non-Uniform Antenna Arrays
December 15, 2008, 12:00am PST
Many recent works have proposed spatial channel models for MIMO applications in the 1 to 10 GHz band. However, recent attention has shifted to the 60 GHz regime where the opening up of the...
Provided by University of Illinois
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White Papers
Capacity of Sparse Wideband Channels With Partial Channel Feedback
January 24, 2008, 12:00am PST
This paper studies the ergodic capacity of wideband multipath channels with partial/limited channel state feedback. The authors' work builds on recent results that show a significant capacity gain...
Provided by University of Illinois
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White Papers
To Code or Not to Code Across Time: Space-Time Coding With Feedback
April 16, 2008, 12:00am PDT
Space-time codes leverage the availability of multiple antennas to enhance the reliability of communication over wireless channels. While space-time codes have initially been designed with a focus...
Provided by University of Illinois
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White Papers
Quantized Multimode Precoding in Spatially Correlated Multi-Antenna Channels
December 30, 2007, 12:00am PST
Multimode precoding, where the number of independent data-streams is adapted optimally, can be used to maximize the achievable throughput in multi-antenna communication systems. Motivated by...
Provided by University of Illinois
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White Papers
Why Does the Kronecker Model Result in Misleading Capacity Estimates?
July 30, 2008, 12:00am PDT
Many recent works that study the performance of Multi-Input Multi-Output (MIMO) systems in practice assume a Kronecker model where the variances of the channel entries, upon decomposition on to...
Provided by University of Illinois
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White Papers
Low-Complexity Structured Precoding for Spatially Correlated MIMO Channels
May 29, 2008, 12:00am PDT
The focus of this paper is on spatial precoding in correlated multi-antenna channels, where the number of independent data-streams is adapted to trade-off the data-rate with the transmitter...
Provided by University of Illinois
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White Papers
Quickest Change Detection of a Markov Process Across a Sensor Array
December 1, 2008, 12:00am PST
Recent attention in quickest change detection in the multi-sensor setting has been on the case where the densities of the observations change at the same instant at all the sensors due to the...
Provided by University of Illinois
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White Papers
Performance Analysis of RVQ-Based Limited Feedback Beamforming Codebooks
January 15, 2009, 12:00am PST
Codebooks based on Random Vector Quantization (RVQ) are popular in limited feedback beamforming applications over MIMO channels because of their low-complexity properties. The goal of this paper...
Provided by University of Illinois
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White Papers
A Virtual Instruction Set Interface for Operating System Kernels
January 1, 2011, 12:00am PST
In this paper, the authors propose and evaluate a virtual instruction set interface between an Operating System (OS) kernel and a general purpose processor architecture. This interface is a set of...
Provided by University of Illinois
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White Papers
Optimizing Multi-Deployment on Clouds by Means of Self-Adaptive Prefetching
May 20, 2011, 12:00am PDT
With Infrastructure-as-a-Service (IaaS) cloud economics getting increasingly complex and dynamic, resource costs can vary greatly over short periods of time. Therefore, a critical issue is the...
Provided by University of Illinois
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White Papers
Reconsidering Power Management
July 16, 2007, 12:00am PDT
Power-management approaches have been widely studied in an attempt to conserve idling energy by allowing nodes to switch to a low-power sleep mode. However, due to the inherent inability of...
Provided by University of Illinois
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White Papers
Dynamic Clustering for Acoustic Target Tracking in Wireless Sensor Networks
January 1, 2011, 12:00am PST
In the paper, the authors devise and evaluate a fully decentralized, light-weight, dynamic clustering algorithm for target tracking. Instead of assuming the same role for all the sensors, they...
Provided by University of Illinois
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White Papers
ModflowOnAzure: An On-Demand "Groundwater Modeling as a Service" Solution
November 15, 2010, 12:00am PST
Cloud computing has emerged as one of the preferred platforms for on-demand, event-driven computing. However, literature on event-driven scientific modeling on the cloud is sparse. This paper...
Provided by University of Illinois
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White Papers
Compute and Storage Clouds Using Wide Area High Performance Networks
July 16, 2008, 12:00am PDT
The authors describe a cloud based infrastructure that they have developed that is optimized for wide area, high performance networks and designed to support data mining applications. The...
Provided by University of Illinois
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White Papers
Towards Understanding Bugs in Open Source Router Software
July 1, 2010, 12:00am PDT
Software errors and vulnerabilities in core Internet routers have led to several high-profile attacks on the Internet infrastructure and numerous outages. Building an understanding of bugs in...
Provided by University of Illinois
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White Papers
A Vehicle-to-Vehicle Communication Protocol for Cooperative Collision Warning
January 1, 2011, 12:00am PST
This paper proposes a vehicle-to-vehicle communication protocol for cooperative collision warning. Emerging wireless technologies for Vehicle-To-Vehicle (V2V) and Vehicle-To-Roadside (V2R)...
Provided by University of Illinois
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White Papers
Modified Version of De Jong Radiopropagation Model
November 10, 2010, 12:00am PST
a semi deterministic propagation model based on De Jong recommendations is described. It is an extended 2D-ray tracing model for planning microcell in urban environment. It uses virtual sources,...
Provided by University of Illinois
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White Papers
Tiered Incentives for Integrity Based Queuing
September 9, 2010, 12:00am PDT
The authors propose a tiered incentive system called Integrity-Based Queuing (IBQ) for protection against Internet Distributed Denial-of-Service (DDoS) attacks. The authors' proposal can be...
Provided by University of Illinois
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White Papers
Capacity of Byzantine Agreement With Finite Link Capacity
January 18, 2011, 12:00am PST
The authors consider the problem of maximizing the throughput of Byzantine agreement, when communication links have finite capacity. Byzantine agreement is a classical problem in distributed...
Provided by University of Illinois
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White Papers
WiSP: A Protocol for Overcoming MAC Overheads Using Packet Size Dependent Channel Widths
December 19, 2010, 12:00am PST
In this paper, the authors propose to reduce the effect of rate-independent MAC overheads in random access protocols by partitioning the transmission channel spectrum into a narrow channel and a...
Provided by University of Illinois
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White Papers
Connectivity and Capacity of Multi-Channel Wireless Networks With Channel Switching Constraints
October 2, 2007, 12:00am PDT
Earlier work on protocols for multi-channel wireless networks has assumed that each node is capable of switching on all channels. This assumption may be challenged by emerging paradigms in...
Provided by University of Illinois
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White Papers
Heterogeneous Multi-Channel Wireless Networks: Scheduling and Routing Issues
October 2, 2007, 12:00am PDT
The authors consider multi-channel networks where nodes may be equipped with heterogeneous radios, each potentially capable of operation on a limited portion of the total available spectrum....
Provided by University of Illinois
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White Papers
Scheduling in Multi-Channel Wireless Networks With Limited Information
February 10, 2008, 12:00am PST
The availability of multiple orthogonal channels in a wireless network can potentially lead to substantial performance improvement by alleviating contention and interference. However, this also...
Provided by University of Illinois
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White Papers
Repeatability of Illinois Wireless Wind Tunnel
May 23, 2008, 12:00am PDT
This paper records the experimental results concerning the repeatability of illinois Wireless Wind Tunnel (iWWT), a testbed for experimental evaluation of wireless networks. The results show that...
Provided by University of Illinois
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