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University of Calgary
(198 results)-
White Papers
Image Management in a Virtualized Data Center
May 22, 2008, 12:00am PDT
Industrial research firms such as Gartner and IDC are predicting an explosion in the number of online services in the coming years. Virtualization technologies could play an important role in such...
Provided by University of Calgary
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White Papers
Benchmarking Modern Web Browsers
August 15, 2008, 12:00am PDT
With the introduction of the first graphical web browser Mosaic in 1993, the World Wide Web (WWW) was made accessible to the world and since then web browsers are increasingly being challenged to...
Provided by University of Calgary
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White Papers
Improved Port Knocking With Strong Authentication
January 1, 2010, 12:00am PST
Sometimes, it becomes necessary to let only the authorized external users access the open ports whereas closed ports may be accessible to all. The paper seeks to investigate various methods of...
Provided by University of Calgary
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White Papers
A Case for Context-Aware TCP/IP
January 1, 2010, 12:00am PST
This paper discusses the design and evaluation of CATNIP, a Context-Aware Transport/Network Internet Protocol for the Web. This integrated protocol uses application-layer knowledge (i.e.,Web...
Provided by University of Calgary
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White Papers
From Desktop to Tabletop: Migrating the User Interface of AgilePlanner
July 16, 2008, 12:00am PDT
Digital tabletops are emerging interactive systems that support group collaborations. To utilize digital tabletops for agile planning meetings, authors migrated a desktop based planning tool -...
Provided by University of Calgary
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White Papers
Exploring the Characteristics, Attributes, and Perceptions of Online Graduate Students in Canadian Higher Education, and the Leadership Implications
May 29, 2009, 12:00am PDT
Higher education in North America is experiencing change impacted by globalization, evolving economies, emerging technologies, growing populations, and shifting student demographics. This is...
Provided by University of Calgary
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White Papers
Wireless Data Traffic: A Decade of Change
January 28, 2009, 12:00am PST
This paper presents an overview of the most significant changes in wireless data traffic and its main driving forces throughout the past decade (1998-2008). The main axes of change are discussed:...
Provided by University of Calgary
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White Papers
Optimization Models for Streaming in Multihop Wireless Networks
June 21, 2007, 12:00am PDT
Wireless spectrum is a scare resource, while media streaming usually requires high end-to-end bandwidth. Media streaming in wireless ad hoc networks is therefore a particularly challenging...
Provided by University of Calgary
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White Papers
A Design for an Anti-Spear-Phishing System
September 1, 2007, 12:00am PDT
Phishing is a widespread and effective computer-mediated social attack. Phishers have proven highly adaptable in terms of exploiting new communications channels witness 'Vishing' and 'SMiShing'...
Provided by University of Calgary
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Whitepapers
Cuckoo: Scaling Microblogging Services With Divergent Traffic Demands
August 27, 2011, 12:00am PDT
Today's microblogging services such as Twitter have long outgrown their initial designs as SMS-based social networks. Instead, a massive and steadily-growing user population of more than 100...
Provided by University of Calgary
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White Papers
Key Exchange Protocol Over Insecure Channel
June 7, 2009, 12:00am PDT
Key management represents a major and the most sensitive part of cryptographic systems. It includes key generation, key distribution, key storage, and key deletion. It is also considered the...
Provided by University of Calgary
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White Papers
On Optimal Secure Message Transmission by Public Discussion
November 8, 2009, 12:00am PST
In a Secure Message Transmission (SMT) scenario a sender wants to send a message in a private and reliable way to a receiver. Sender and receiver are connected by n vertex disjoint paths, referred...
Provided by University of Calgary
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White Papers
On the Word Problem for ÓÐ-Categories, and the Properties of Two-Way Communication
April 9, 2009, 12:00am PDT
The word problem for categories with free products and co-products (sums), ÓÐ-categories, is directly related to the problem of determining the equivalence of certain processes. Indeed, the maps...
Provided by University of Calgary
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White Papers
Construction of Universal Designated-Verifier Signatures and Identity-Based Signatures From Standard Signatures
May 6, 2008, 12:00am PDT
The authors give a generic construction for universal designated-verifier signature schemes from a large class, C, of signature schemes. The resulting schemes are efficient and have two important...
Provided by University of Calgary
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White Papers
The Cost Advantage of Network Coding in Uniform Combinatorial Networks
March 30, 2008, 12:00am PDT
The coding advantage refers to the potential for network coding to improve end-to-end throughput or reduce routing cost. How large can the coding advantage be? The authors investigate this...
Provided by University of Calgary
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White Papers
Clustering Posts in Online Discussion Forum Threads
April 1, 2011, 12:00am PDT
Online discussion forums are considered a challenging repository for data mining tasks. Forums usually contain hundreds of threads which in turn consist of hundreds, or even thousands, of posts....
Provided by University of Calgary
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White Papers
What Makes APIs Difficult to Use?
April 1, 2008, 12:00am PDT
In the '70s and '80s if a programmer wanted to create software, he or she had to write pretty much everything from the scratch. But with the progress of technology and software engineering...
Provided by University of Calgary
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White Papers
Offline/Realtime Traffic Classification Using Semi-Supervised Learning
January 1, 2011, 12:00am PST
Identifying and categorizing network traffic by application type is challenging because of the continued evolution of applications, especially of those with a desire to be undetectable. The...
Provided by University of Calgary
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White Papers
Secure Email With Fingerprint Recognition
January 9, 2009, 12:00am PST
Public key cryptographic techniques have been used to protect email messages via encryption and digital signatures for more than 26 years. Such techniques, however, failed to adopt secure email...
Provided by University of Calgary
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White Papers
Outsourcing Multi-Party Computation
May 27, 2011, 12:00am PDT
The authors initiate the study of secure Multi-Party Computation (MPC) in a server-aided setting, where the parties have access to a single server that does not have any input to the computation;...
Provided by University of Calgary
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White Papers
A Privacy Preservation Model for Facebook-Style Social Network Systems
June 27, 2009, 12:00am PDT
Recent years have seen unprecedented growth in the popularity of social network systems, with Facebook being an archetypical example. The access control paradigm behind the privacy preservation...
Provided by University of Calgary
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White Papers
Tool Support for Software Development Based on Formal Specifications in RTPA
July 1, 2009, 12:00am PDT
The benefits of formal specification methodologies in software development have been identified and well researched. Their use in mainstream software development, however, continues to face a...
Provided by University of Calgary
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White Papers
Improving Bug Tracking Systems
December 5, 2008, 12:00am PST
It is important that information provided in bug reports is relevant and complete in order to help resolve bugs quickly. However, often such information trickles to developers after several...
Provided by University of Calgary
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White Papers
Improving Quality, One Process Change at a Time
February 11, 2009, 12:00am PST
The authors report on one organization's experience making process changes in a suite of projects. The changes were motivated by clients' requests for better time estimates, better quality, better...
Provided by University of Calgary
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White Papers
A Review of Cloud Computing Security: Virtualization, Side-Channel Attacks, and Management
March 14, 2011, 12:00am PDT
In recent years cloud computing has become a growing interest for organizations looking to reduce their IT costs by offloading infrastructure and software costs onto 3rd party organizations who...
Provided by University of Calgary
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Whitepapers
Localization With Witnesses
January 1, 2012, 12:00am PST
Localization protocols enable an entity (called the verifier) to determine the physical location of another entity (called the prover), even if the prover maliciously advertises a false location...
Provided by University of Calgary
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Whitepapers
On Constant-Round Concurrent Zero-Knowledge From a Knowledge Assumption
October 13, 2012, 12:00am PDT
In this paper, the authors consider the long-standing open question of constructing constant-round concurrent zero-knowledge protocols in the plain model. Resolving this question is known to...
Provided by University of Calgary
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Whitepapers
Understanding the Physical and Economic Consequences of Attacks on Control Systems
June 11, 2009, 12:00am PDT
This paper describes an approach for developing threat models for attacks on control systems. These models are useful for analyzing the actions taken by an attacker who gains access to control...
Provided by University of Calgary
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Whitepapers
ACORN: An Auto-Configuration Framework for 802.11n WLANs
September 6, 2012, 12:00am PDT
The wide channels feature combines two adjacent channels to form a new, wider channel to facilitate high data rate transmissions in MIMO-based 802.11n networks. Using a wider channel can...
Provided by University of Calgary
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Whitepapers
Realizing the Benefits of Wireless Network Coding in Multi-Rate Settings
August 19, 2012, 12:00am PDT
Network coding has been proposed as a technique that can potentially increase the transport capacity of a wireless network via mixing data packets at intermediate routers. However, most previous...
Provided by University of Calgary
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Whitepapers
Distributed Throughput Optimization Over P2P Mesh Networks Using Diffusion Adaptation
May 24, 2012, 12:00am PDT
This work develops a decentralized adaptive strategy for throughput maximization over Peer-To-Peer (P2P) networks. The adaptive strategy can cope with changing network topologies, is robust to...
Provided by University of Calgary
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Whitepapers
Combination Weights for Diffusion Strategies With Imperfect Information Exchange
May 24, 2012, 12:00am PDT
Adaptive networks rely on in-network and collaborative processing among distributed agents to deliver enhanced performance in estimation and inference tasks. Information is exchanged among the...
Provided by University of Calgary
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Whitepapers
Bit-Interleaved Coded Multiple Beamforming With Perfect Coding
May 24, 2012, 12:00am PDT
When Channel State Information (CSI) is available at both the transmitter and the receiver, beamforming techniques exploiting Singular Value Decomposition (SVD) are applied in a Multiple-Input...
Provided by University of Calgary
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Whitepapers
Outage Performance for Amplify-and-Forward Channels With an Unauthenticated Relay
May 24, 2012, 12:00am PDT
The authors investigate a relay network where the source can potentially utilize an unauthenticated Amplify-and-Forward (AF) relay to augment its direct transmission of a confidential message to...
Provided by University of Calgary
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Whitepapers
Coded Path Protection: Efficient Conversion of Sharing to Coding
May 24, 2012, 12:00am PDT
Link failures in wide area networks are common and cause significant data losses. Mesh-based protection schemes offer high capacity efficiency but they are slow and require complex signaling....
Provided by University of Calgary
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Whitepapers
Protograph-Based Raptor-Like LDPC Codes With Low Thresholds
May 24, 2012, 12:00am PDT
This paper presents a new construction of Punctured-Node Protograph-Based Raptor-Like (PN-PBRL) codes that is suitable for long-blocklength applications. As with the Raptor codes, additional...
Provided by University of Calgary
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Whitepapers
Cyclostationarity-Based Low Complexity Wideband Spectrum Sensing Using Compressive Sampling
May 24, 2012, 12:00am PDT
Detecting the presence of licensed users and avoiding interference to them is vital to the proper operation of a Cognitive Radio (CR) network. Operating in a wideband channel requires high Nyquist...
Provided by University of Calgary
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Whitepapers
Global Motion Compensation and Spectral Entropy Bit Allocation for Low Complexity Video Coding
May 24, 2012, 12:00am PDT
Most standard video compression schemes such as H.264/AVC involve a high complexity encoder with block Motion Estimation (ME) engine. However, applications such as video reconnaissance and...
Provided by University of Calgary
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Whitepapers
Wireless Network Aware Cloud Scheduler for Scalable Cloud Mobile Gaming
May 24, 2012, 12:00am PDT
Cloud Mobile Gaming (CMG) has been proposed as an approach to enable rich Internet games on mobile devices, where the rendering of the games is performed on cloud servers, as opposed to on mobile...
Provided by University of Calgary
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Whitepapers
Analysis of a MIMO OFDMA Heterogeneous Feedback System Employing Joint Scheduling and Spatial Diversity in Nakagami Fading Channels
May 24, 2012, 12:00am PDT
The authors present a unified analytical framework to jointly examine spatial, spectral, and multiuser diversity in a general multiuser MIMO OFDMA system. Spectral diversity originates from...
Provided by University of Calgary
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Whitepapers
Data Naming in Vehicle-to-Vehicle Communications
January 27, 2012, 12:00am PST
Vehicular networking is becoming reality. Today vehicles use TCP/IP to communicate with centralized servers through cellular networks. However many vehicular applications, such as information...
Provided by University of Calgary
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Whitepapers
DMND: Collecting Data from Mobiles Using Named Data
November 15, 2010, 12:00am PST
Technology advances in computations and wireless communications have made it economically feasible for manufacturers to collect data from vehicles on the road in order to monitor their operations...
Provided by University of Calgary
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Whitepapers
Effects of Channel Estimation Error and Nonlinear HPA on the Performance of OFDM in Rayleigh Channels with Application to 802.11n WLAN
March 11, 2008, 12:00am PDT
In this paper, the authors present the performance analysis of an Orthogonal Frequency Division Multiplexing (OFDM) system which is subject to nonlinear distortion and channel estimation error in...
Provided by University of Calgary
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Whitepapers
On the Accuracy of Sampling Schemes for Wireless Network Characterization
March 11, 2008, 12:00am PDT
Wireless network characterization is an important task in next generation wireless networks. In order to achieve efficient wireless network characterization, accurate sampling strategies are...
Provided by University of Calgary
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Whitepapers
A Theoretical Treatment of PA Power Optimization in Clipped MIMO-OFDM Systems
October 27, 2009, 12:00am PDT
In this paper, the authors present a theoretical framework for determining the optimal clipping level for a Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM)...
Provided by University of Calgary
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Whitepapers
Optimum Power Allocation Against Information Leakage in Wireless Network
October 27, 2009, 12:00am PDT
The authors investigate the problem of eavesdropping control in wireless communications networks. When a confidential message is transmitted through a wireless network, there is a potential...
Provided by University of Calgary
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Whitepapers
A Framework to Eliminate Backdoors From Response-Computable Authentication
August 15, 2012, 12:00am PDT
Response-Computable Authentication (RCA) is a two-party authentication model widely adopted by authentication systems, where an authentication system independently computes the expected user...
Provided by University of Calgary
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Whitepapers
SoK: Eternal War in Memory
March 4, 2013, 12:00am PST
Memory corruption bugs in software written in low-level languages like C or C++ are one of the oldest problems in computer security. The lack of safety in these languages allows attackers to alter...
Provided by University of Calgary
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Whitepapers
Neighbor Discovery for Ultraviolet Ad Hoc Networks
August 24, 2011, 12:00am PDT
The solar blind UltraViolet (UV) scattering channel makes non-line-of-sight UV communications very attractive for military applications, particularly for communication on-the-move with low...
Provided by University of Calgary
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Whitepapers
Experimental Characterization of Interference in OFDMA Femtocell Networks
March 15, 2012, 12:00am PDT
The increase in mobile data usage is pushing broadband operators towards deploying smaller cells (femtocells) and sophisticated access technologies such as OFDMA. The expected high density of...
Provided by University of Calgary
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Whitepapers
A Distributed Algorithm for Random Convex Programming
November 24, 2011, 12:00am PST
The authors study a distributed approach for solving Random Convex Programs (RCP) for the case in which problem constraints are distributed among nodes in a processor network. They devise a...
Provided by University of Calgary
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Whitepapers
Beamforming in Wireless Relay-Interference Networks with Quantized Feedback
October 27, 2009, 12:00am PDT
In this paper, the authors are on quantized beamforming in wireless amplify-and-forward relay interference networks with multiple transmitter-receiver pairs. They design the quantizer of the...
Provided by University of Calgary
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Whitepapers
Nonuniform Array Design for Robust Millimeter-Wave MIMO Links
October 27, 2009, 12:00am PDT
Spatial multiplexing for millimeter (mm) wave Line Of Sight (LOS) links potentially enables data rates of the order of 10-100 Gbps. Most prior work in this area has focused on uniform transmit and...
Provided by University of Calgary
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Whitepapers
A Convex Optimization Approach to Blind Channel Shortening in Multicarrier Modulations
October 27, 2009, 12:00am PDT
The authors study the problem of channel shortening in multicarrier modulation systems without training. They reformulate two existing methods, the sum-squared and the Sum-Absolute Autocorrelation...
Provided by University of Calgary
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Whitepapers
ICostale: Adaptive Cost Optimization for Storage Clouds
February 14, 2011, 12:00am PST
The unprecedented volume of data generated by contemporary business users and consumers has created enormous data storage and management challenges. In order to control data storage cost, many...
Provided by University of Calgary
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Whitepapers
Privacy-Preserving Cloud Database Querying
November 22, 2011, 12:00am PST
Due to its low cost, robustness, flexibility and ubiquitous nature, cloud computing is changing the way entities manage their data. However, various privacy concerns arise whenever potentially...
Provided by University of Calgary
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Whitepapers
Power Allocation for Beamforming Relay Networks Under Channel Uncertainties
March 2, 2010, 12:00am PST
Power allocation strategies have attracted considerable attention in an effort to reduce the network power and/or improve the performance of the cooperative relay networks. In cooperative relay...
Provided by University of Calgary
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Whitepapers
Content Based Traffic Engineering in Software Defined Information Centric Networks
January 31, 2013, 12:00am PST
This paper describes a content centric network architecture which uses software defined networking principles to implement efficient metadata driven services by extracting content metadata at the...
Provided by University of Calgary
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Whitepapers
Cramer-Rao Bounds for Joint RSS/DoA-Based Primary-User Localization in Cognitive Radio Networks
July 5, 2012, 12:00am PDT
Knowledge about the location of licensed Primary-Users (PU) could enable several key features in Cognitive Radio (CR) networks including improved spatio-temporal sensing, intelligent...
Provided by University of Calgary
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Whitepapers
Dynamic Thermal Management Through Task Scheduling
February 27, 2008, 12:00am PST
The evolution of microprocessors has been hindered by their increasing power consumption and the heat generation speed on-die. High temperature impairs the processor's reliability and reduces its...
Provided by University of Calgary
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Whitepapers
Multi-User Detection for Asynchronous Space-Frequency Block Coded Schemes in Frequency Selective Environments
November 21, 2012, 12:00am PST
Multi-user detection is an efficient approach proposed to boost the spectral efficiency of a wireless communication system. While multi-user detection in synchronous systems or in flat fading...
Provided by University of Calgary
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Whitepapers
Design Space Exploration of a Cooperative MIMO Receiver for Reconfigurable Architectures
May 6, 2008, 12:00am PDT
Cooperative MIMO is a new technique that allows disjoint wireless communication nodes (e.g. wireless sensors) to form a virtual antenna array to increase bandwidth, reliability and/or transmission...
Provided by University of Calgary
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Whitepapers
Cooperative Beamforming in Multiuser MIMO Networks: Fast SINR Fairness Algorithms
November 21, 2012, 12:00am PST
This paper studies efficient signal transmission strategies in a multiuser MIMO network where multiple source nodes form a large virtual MIMO array to perform cooperative beamforming. In order to...
Provided by University of Calgary
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Whitepapers
Spectrum Management in Heterogeneous Bandwidth Networks
November 21, 2012, 12:00am PST
As optical network continues to evolve, lightpaths will take on different spectrum spaces as opposed to current uniform 50-GHz grid. While lightpaths of heterogeneous bandwidths co-exist, two...
Provided by University of Calgary
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Whitepapers
Macroscopically Sustainable Networking: An Internet Quine
September 16, 2012, 12:00am PDT
The Internet stands atop an unseen industrial system required for its continued growth, operation, and maintenance. While its scale could not have been achieved without this reliance, its...
Provided by University of Calgary
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Whitepapers
Making the Internet More Evolvable
October 15, 2012, 12:00am PDT
Why is the Internet so hard to evolve? Some argue that the people require a radically different architecture to enable evolution. To the contrary, they contend that a simple re-engineering of the...
Provided by University of Calgary
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Whitepapers
Linear Programming Based Joint Detection of LDPC Coded MIMO Systems
November 21, 2012, 12:00am PST
Multiple-Input Multiple-Output (MIMO) communication systems can achieve higher throughput by exploiting diversity in multi-antenna wireless communications. Spatial multiplexing schemes attempts to...
Provided by University of Calgary
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Whitepapers
Efficient Complex Operators for Irregular Codes
December 12, 2010, 12:00am PST
Complex "Fat operators" are important contributors to the efficiency of specialized hardware. This paper introduces two new techniques for constructing efficient fat operators featuring up to...
Provided by University of Calgary
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Whitepapers
Simultaneous Information and Energy Transfer: A Two-User MISO Interference Channel Case
November 21, 2012, 12:00am PST
This paper considers the sum rate maximization problem of a two-user multiple-input single-output interference channel with receivers that can scavenge energy from the radio signals transmitted by...
Provided by University of Calgary
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Whitepapers
Robust Multicasting in Micro Base Station Aided Wireless Cellular Networks
November 21, 2012, 12:00am PST
Efficient multicasting of critical messages is of essential importance in public safety and commercial multimedia cellular networks. The authors study the effectiveness of using the aid of micro...
Provided by University of Calgary
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Whitepapers
Shadow Chasing Enhancement in Resource Allocation for Heterogeneous Networks
November 21, 2012, 12:00am PST
In this paper, the authors propose an enhancement to a resource allocation scheme known as shadow chasing for interference mitigation in heterogeneous networks composed of Macrocell User...
Provided by University of Calgary
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Whitepapers
Aggregation Queries in the Database-As-a-Service Model
January 1, 2013, 12:00am PST
In the Database-As-a-Service (DAS) model, clients store their database contents at servers belonging to potentially untrusted service providers. To maintain data confidentiality, clients need to...
Provided by University of Calgary
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Whitepapers
Beyond Secret Handshakes: Affiliation-Hiding Authenticated Key Exchange
January 1, 2013, 12:00am PST
The authors consider a very strong notion of Secret Handshakes, namely Affiliation-Hiding Authenticated Key Exchange protocols (AH-AKE), which guarantee security under arbitrary composition of...
Provided by University of Calgary
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Whitepapers
Improving the Performance of Cognitive Radios Through Classification, Learning, and Predictive Channel Selection
December 27, 2011, 12:00am PST
Prediction of future idle times of different channels based on history information allows a Cognitive Radio (CR) to select the best channels for control and data transmission. In contrast to...
Provided by University of Calgary
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Whitepapers
Evolving Landscape of Cellular Network Traffic
August 27, 2012, 12:00am PDT
Recent technological advances have resulted in a dramatic change in the market shares of cellular mobile devices. However, little is known about the impact of these changes on the landscape of...
Provided by University of Calgary
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Whitepapers
Optimal Motion and Communication for Persistent Information Collection Using a Mobile Robot
September 22, 2012, 12:00am PDT
In this paper, the authors study the problem of persistent information collection using a mobile robot. They consider the scenario where information bits are generated with certain rates at a...
Provided by University of Calgary
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Whitepapers
A Distributed Protocol for Wireless Sensor Networks Based on Multiple-Leader Stackelberg Network Games
September 12, 2012, 12:00am PDT
While the past literature on game theory rarely addresses the implementation of protocols that converge to Nash equilibria, practical networks must be designed with protocols that correctly...
Provided by University of Calgary
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Whitepapers
Time-Delay Estimation Applying the Extended Invariance Principle With a Polynomial Rooting Approach
September 2, 2009, 12:00am PDT
This paper treats the problem of joint estimation of time-delay and spatial (Direction-Of-Arrival, DOA) parameters of several replicas of a known signal in an unknown spatially correlated field....
Provided by University of Calgary
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Whitepapers
Downlink Resource Allocation for Multi-User MIMO-OFDMA Systems: The Kalai-Smorodinsky Bargaining Approach
October 16, 2009, 12:00am PDT
As a promising technology to significantly increase the spectral efficiency of wireless systems, Multiple-Input and Multiple-Output (MIMO) techniques have drawn much attention over the past two...
Provided by University of Calgary
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Whitepapers
Securing Multi-Antenna Two-Way Relay Channels With Analog Network Coding Against Eavesdroppers
November 25, 2010, 12:00am PST
This paper investigates the vulnerability of Analog Network Coding (ANC) to physical layer attacks from adversarial users, when all nodes are equipped with multiple antennas. Specifically, the...
Provided by University of Calgary
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