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North Carolina State University
(244 results)-
White Papers
DiffGen: Automated Regression Unit-Test Generation
July 3, 2008, 12:00am PDT
Software programs continue to evolve throughout the lifetime. Maintenance of such evolving programs, including regression testing, is one of the most expensive activities in software development....
Provided by North Carolina State University
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White Papers
First Step Towards Automatic Correction of Firewall Policy Faults
August 24, 2010, 12:00am PDT
In this paper, the authors make three major contributions. First, they propose the first comprehensive fault model for firewall policies including five types of faults. For each type of fault,...
Provided by North Carolina State University
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White Papers
DiffQ: Practical Differential Backlog Congestion Control for Wireless Networks
January 26, 2009, 12:00am PST
Congestion control in wireless multi-hop networks is challenging and complicated because of two reasons. First, interference is ubiquitous and causes loss in the shared medium. Second, wireless...
Provided by North Carolina State University
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White Papers
Visualization and the Larger World of Computer Graphics: What's Happening Out There?
October 1, 2007, 12:00am PDT
Visualization based on computer graphics and interactive techniques was formally defined 20 years ago in a landmark report sponsored by the National Science Foundation, "Visualization in...
Provided by North Carolina State University
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White Papers
Guided Path Exploration for Regression Test Generation
February 13, 2009, 12:00am PST
Regression test generation aims at generating a test suite that can detect behavioral differences between the original and the modified versions of a program. Regression test generation can be...
Provided by North Carolina State University
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White Papers
Joint Effects of Radio Channels and Node Mobility on Link Dynamics in Wireless Networks
February 29, 2008, 12:00am PST
In this paper, the authors study link properties over dynamic radio channels based on analytical models and simulations. Specifically, channel variability and mobility are investigated through two...
Provided by North Carolina State University
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White Papers
A Timed Logic for Modeling and Reasoning About Security Protocols
December 22, 2010, 12:00am PST
Many logical methods are usually considered suitable to express the static properties of security protocols while unsuitable to model dynamic processes or properties. However, a security protocol...
Provided by North Carolina State University
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White Papers
Design and Evaluation of Two Geocast Protocols for Vehicular Ad-Hoc Networks
June 1, 2008, 12:00am PDT
Vehicular Ad-hoc NETworks (VANETs) offer a large number of new potential applications. One of the envisioned applications is of course Internet access, which can be provided with the help of some...
Provided by North Carolina State University
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White Papers
The Incremental Deployability of RTT-Based Congestion Avoidance for High Speed TCP Internet Connections
January 1, 2011, 12:00am PST
The research focuses on end-to-end congestion avoidance algorithms that use Round Trip Time (RTT) fluctuations as an indicator of the level of network congestion. The algorithms are referred to as...
Provided by North Carolina State University
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White Papers
Asymmetric Multiprocessing for Simultaneous Multithreading Processors
January 1, 2011, 12:00am PST
Simultaneous Multithreading (SMT) has become common in commercially available processors with hardware support for dual contexts of execution. However, performance of SMT systems has been...
Provided by North Carolina State University
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White Papers
Preserving Timing Anomalies in Pipelines of High-End Processors
May 19, 2008, 12:00am PDT
Many embedded systems are subject to temporal constraints that require advance guarantees on meeting deadlines. Such systems rely on static analysis to safely bound Worst-Case ExecuTion (WCET)...
Provided by North Carolina State University
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White Papers
Feedback-Directed Page Placement for CcNUMA Via Hardware-Generated Memory Traces
March 10, 2009, 12:00am PDT
Non-Uniform Memory Architectures with cache coherence (ccNUMA) are becoming increasingly common, not just for large-scale high performance platforms but also in the context of multi-cores...
Provided by North Carolina State University
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White Papers
Probabilistic Communication and I/O Tracing With Deterministic Replay at Scale
March 15, 2011, 12:00am PDT
With today's petascale supercomputers, applications often exhibit low efficiency, such as poor communication and I/O performance that can be diagnosed by analysis tools. However, these tools...
Provided by North Carolina State University
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White Papers
Static Task Partitioning for Locked Caches in Multi-Core Real-Time Systems
April 28, 2011, 12:00am PDT
Massive multi-core architectures with tens of cores are becoming more prevalent in embedded systems. However, their acceptance in the real-time systems domain is rather low due to challenges in...
Provided by North Carolina State University
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White Papers
Challenges for Cyber-Physical Systems: Security, Timing Analysis and Soft Error Protection
January 1, 2011, 12:00am PST
The power grid represents a distributed cyber-physical system that is essential to the every-day life. Larger-scale black-outs are known to have a severe economic and safety impact, as historical...
Provided by North Carolina State University
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White Papers
Making DRAM Refresh Predictable
May 2, 2010, 12:00am PDT
Embedded control systems with hard real-time constraints require that deadlines are met at all times or the system may malfunction with potentially catastrophic consequences. Schedulability theory...
Provided by North Carolina State University
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White Papers
FREEDM Software Controller Architecture for a Solid State Transformer
April 29, 2009, 12:00am PDT
The Future Renewable Electric Energy Delivery and Management (FREEDM) project aims at providing an efficient electric power grid integrating alternative generating sources and storage with...
Provided by North Carolina State University
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White Papers
Fault Tolerant Network Routing Through Software Overlays for Intelligent Power Grids
May 20, 2010, 12:00am PDT
Control decisions of intelligent devices in critical infrastructure can have a significant impact on human life and the environment. Insuring that the appropriate data is available is crucial in...
Provided by North Carolina State University
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White Papers
Hybrid Checkpointing for MPI Jobs in HPC Environments
September 29, 2010, 12:00am PDT
As the core count in high-performance computing systems keeps increasing, faults are becoming common place. Checkpointing addresses such faults but captures full process images even though only a...
Provided by North Carolina State University
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White Papers
On-the-Fly Recovery of Job Input Data in Supercomputers
June 15, 2008, 12:00am PDT
In HPC settings, data and I/O availability is critical to center operations and user serviceability. Petascale machines require 10,000s of disks attached to 1,000s of I/O nodes. Plans for 100k to...
Provided by North Carolina State University
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White Papers
Large-Scale Multi-Dimensional Document Clustering on GPU Clusters
January 18, 2010, 12:00am PST
Document clustering plays an important role in data mining systems. Recently, a flocking-based document clustering algorithm has been proposed to solve the problem through simulation resembling...
Provided by North Carolina State University
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White Papers
Improving the Availability of Supercomputer Job Input Data Using Temporal Replication
May 13, 2009, 12:00am PDT
Storage systems in supercomputers are a major reason for service interruptions. RAID solutions alone cannot provide sufficient protection as 1) growing average disk recovery times make RAID groups...
Provided by North Carolina State University
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White Papers
A Model for Sharing of Confidential Provenance Information in a Query Based System
May 30, 2008, 12:00am PDT
Workflow management systems are increasingly being used to automate scientific discovery. Provenance meta-data is collected about workflows, processes, simulations and data to add value. This...
Provided by North Carolina State University
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White Papers
Design and Applications of a Smooth Mobility Model for Mobile Ad Hoc Networks
January 1, 2011, 12:00am PST
Existing mobility models used in the simulation tools have two major limitations. First, these models invoke unrealistic moving behaviors, such as sudden stop and sharp turn during the simulation....
Provided by North Carolina State University
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White Papers
Towards Well-Behaved Schema Evolution
June 28, 2009, 12:00am PDT
The authors study the problem of schema evolution in the RDF data model. RDF and the RDFS schema language are W3C standards for flexibly modeling and sharing data on the web. Although schema...
Provided by North Carolina State University
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White Papers
Towards Quantitative Analysis of Proofs of Authorization: Applications, Framework, and Techniques
April 30, 2010, 12:00am PDT
Although policy compliance testing is generally treated as a binary decision problem, the evidence gathered during the trust management process can actually be used to examine these outcomes...
Provided by North Carolina State University
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White Papers
DARTS: Techniques and Tools for Predictably Fast Memory Using Integrated Data Allocation and Real-Time Task Scheduling
April 1, 2010, 12:00am PDT
Hardware-managed caches introduce large amounts of timing variability, complicating real-time system design. One alternative is a memory system with scratchpad memories which improve system...
Provided by North Carolina State University
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White Papers
Mining Exception-Handling Rules as Sequence Association Rules
February 13, 2009, 12:00am PST
Programming languages such as Java and C++ provide exception-handling constructs such as try-catch to handle exception conditions that arise during program execution. Under these exception...
Provided by North Carolina State University
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White Papers
Informative Middleman Service, Variety-Expansion And Long Run Growth
May 17, 2010, 12:00am PDT
In reality, the intermediate firms not only conduct R&D but also provide informative middleman services to overcome the information cost generated by technological advancements. The author...
Provided by North Carolina State University
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White Papers
Schumpeterian Growth, Trade, And Dynamic Comparative Advantage
May 1, 2010, 12:00am PDT
The authors study the effects of trade on economic growth in a Schumpeterian framework. The model excludes scale effects and technology transfer, the two usual channels in the literature through...
Provided by North Carolina State University
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Whitepapers
IEEE 802.11 Saturation Throughput Analysis in the Presence of Hidden Terminals
July 6, 2011, 12:00am PDT
Due to its usefulness and wide deployment, IEEE 802.11 has been the subject of numerous studies but still lacks a complete analytical model. Hidden terminals are common in IEEE 802.11 and cause...
Provided by North Carolina State University
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Whitepapers
Network Virtualization: Technologies, Perspectives, and Frontiers
August 14, 2012, 12:00am PDT
Network virtualization refers to a broad set of technologies. Commercial solutions have been offered by the industry for years, while more recently the academic community has emphasized...
Provided by North Carolina State University
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Whitepapers
A Fast Path-Based ILP Formulation for Offline RWA in Mesh Optical Networks
August 1, 2012, 12:00am PDT
RWA is a fundamental problem in the design and control of optical networks. The authors introduce the concept of symmetric RWA solutions and present a new ILP formulation to construct optimally...
Provided by North Carolina State University
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Whitepapers
Demonstration of QoS-Aware Video Streaming Over a Metro-Scale Optical Network Using a Cross-Layer Architectural Design
October 12, 2010, 12:00am PDT
QoS-aware video streaming is demonstrated on an optical network using a service-oriented architecture and a NetFPGA-based optical control plane. Dynamic optical power fluctuations are either...
Provided by North Carolina State University
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Whitepapers
Internet Service Tiering as a Market Segmentation Strategy
January 1, 2012, 12:00am PST
The authors consider Internet broadband access as an elastic service whose value varies across segments of the user population. They show that introducing multiple tiers of service can be an...
Provided by North Carolina State University
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Whitepapers
A Hierarchical Model for Multigranular Optical Networks
July 23, 2009, 12:00am PDT
The authors present a hierarchical algorithm for grooming light-paths into wavebands, and routing wavebands over a network of multi-granular switching nodes. This algorithm focuses on lowering the...
Provided by North Carolina State University
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Whitepapers
On Optimal Sizing of Tiered Network Services
December 19, 2007, 12:00am PST
The authors develop an economic model for networks offering tiered services and they formulate the problem of selecting the service tiers from three perspectives: one that considers the users'...
Provided by North Carolina State University
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Whitepapers
A Composition Algorithm for the SILO Cross-Layer Optimization Service Architecture
December 7, 2007, 12:00am PST
The authors have previously proposed a software architecture for the future Internet called SILO that is specifically targeted to accommodate cross-layering gracefully. In such an architecture,...
Provided by North Carolina State University
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Whitepapers
Efficient Implementation of Best-Fit Scheduling for Advance Reservations and QoS in Grids
August 6, 2007, 12:00am PDT
In this paper, the authors consider the problem of providing QoS guarantees to Grid users by means of advance reservation of resources. Advance reservation mechanisms provide with the ability to...
Provided by North Carolina State University
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Whitepapers
Clustering for Hierarchical Traffic Grooming in Large Scale Mesh WDM Networks
July 20, 2007, 12:00am PDT
The authors present a clustering algorithm for hierarchical traffic grooming in large WDM networks. In hierarchical grooming, the network is decomposed into clusters, and one hub node in each...
Provided by North Carolina State University
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White Papers
Isolating Failure-Inducing Combinations in Combinatorial Testing Using Test Augmentation and Classification
March 18, 2012, 12:00am PDT
Combinatorial Testing (CT) is a systematic way of sampling input parameters of the Software Under Test (SUT). A t-way combinatorial test set can exercise all behaviors of the SUT caused by...
Provided by North Carolina State University
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White Papers
Making Exceptions on Exception Handling
March 26, 2012, 12:00am PDT
The exception-handling mechanism has been widely adopted to deal with exception conditions that may arise during program executions. To produce high-quality programs, developers are expected to...
Provided by North Carolina State University
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White Papers
Inferring Method Specifications From Natural Language API Descriptions
March 30, 2012, 12:00am PDT
Application Programming Interface (API) documents are a typical way of describing legal usage of reusable software libraries, thus facilitating software reuse. However, even with such documents,...
Provided by North Carolina State University
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White Papers
ExMin: A Routing Metric for True Opportunity Gain in Delay Tolerant Networks
January 12, 2011, 12:00am PST
DTNs have emerged as an attractive networking paradigm for mobile networks where transmission links among mobile nodes are dynamically established or torn down and communication is accomplished...
Provided by North Carolina State University
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White Papers
A Step Toward Realistic Performance Evaluation of High-Speed TCP Variants
January 1, 2012, 12:00am PST
In this paper, the authors' work on designing realistic evaluation suites for testing high-speed TCP variants. They have created an experimental network model that captures some of the complex...
Provided by North Carolina State University
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White Papers
Rethinking Wireless MAC Architecture for Quality of Service Support - Design and Implementation
July 3, 2007, 12:00am PDT
Existing wireless MAC standards are known to have fairness problems. In this paper, the authors ask a more fundamental question: should fairness be a property of medium access, or in other words,...
Provided by North Carolina State University
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White Papers
On the Levy-Walk Nature of Human Mobility: Do Humans Walk Like Monkeys?
June 26, 2007, 12:00am PDT
The authors report that human walk patterns closely follow Levy walk patterns commonly observed in animals such as monkeys, birds and jackals. Their study is based on about one thousand hours of...
Provided by North Carolina State University
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White Papers
Cross-Layer Optimization Made Practical
July 13, 2007, 12:00am PDT
Limited resources and time-varying nature of wireless ad hoc networks demand optimized use of resources across layers. Cross-Layer Optimization (CLO) for wireless networks, an approach that...
Provided by North Carolina State University
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White Papers
Experimental Evaluation of MAC Protocols for Fairness and QoS Support in Wireless Networks
August 1, 2008, 12:00am PDT
Existing wireless MACs are known to have fairness and QoS problems. In response, the wireless community has come up with numerous "Point solutions", with one-to-one comparison of their solution...
Provided by North Carolina State University
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White Papers
CUBIC: A New TCPFriendly High-speed TCP Variant
June 4, 2008, 12:00am PDT
CUBIC is a congestion control protocol for TCP (Transmission Control Protocol) and the current default TCP algorithm in Linux. The protocol modifies the linear window growth function of existing...
Provided by North Carolina State University
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White Papers
DTN Routing Strategies Using Optimal Search Patterns
May 11, 2008, 12:00am PDT
Biologists have long shown that the mobility patterns of many foraging animals and insects are similar to Levy walks and Levy walks are an optimal search strategy when target objects (i.e., food...
Provided by North Carolina State University
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White Papers
On the Levy-Walk Nature of Human Mobility
January 15, 2008, 12:00am PST
The authors report that human walks performed in outdoor settings of tens of kilometers resemble a truncated form of Levy walks commonly observed in animals such as monkeys, birds and jackals....
Provided by North Carolina State University
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White Papers
Netset: Automating Network Performance Evaluation
May 22, 2009, 12:00am PDT
Performance measurement and comparison is integral to almost any kind of networking research. However, the authors currently lack a general framework under which network-based tests can be carried...
Provided by North Carolina State University
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White Papers
Treat-Before-Trick : Free-Riding Prevention for BitTorrent-Like Peer-to-Peer Networks
January 21, 2009, 12:00am PST
In P2P file sharing systems, free-riders who use others' resources without sharing their own cause system-wide performance degradation. Existing techniques to counter free-riders are either...
Provided by North Carolina State University
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White Papers
Generic Optical Network Provisioning Services to Support Emerging Grid Applications
July 16, 2007, 12:00am PDT
Emerging high-end applications require a rich set of network provisioning services that go beyond the traditional source-destination, end-to-end path service. They also require high-bandwidth and...
Provided by North Carolina State University
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White Papers
ERONs: Dynamic Lightpath Networking Via Overlay Control of Static Optical Connections
January 2, 2009, 12:00am PST
To bridge the gap between the current practice of setting up expensive, dedicated, lightpath connections (i.e., static topologies), and the distant future vision of inexpensive access to...
Provided by North Carolina State University
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White Papers
Detecting Concurrency-Related Problematic Activity Arrangement in WS-BPEL Programs
May 3, 2011, 12:00am PDT
A composite web service often interacts with several partner web services hosted in different servers. These partner web services are represented as activities in a WS-BPEL program describing the...
Provided by North Carolina State University
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White Papers
Model Checking for Verification of Mandatory Access Control Models and Properties
July 6, 2010, 12:00am PDT
Mandatory Access Control (MAC) mechanisms control which users or processes have access to which resources in a system. MAC policies are increasingly specified to facilitate managing and...
Provided by North Carolina State University
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White Papers
RWA in WDM Rings: An Efficient Formulation Based on Maximal Independent Set Decomposition
March 24, 2011, 12:00am PDT
WDM rings are now capable of supporting more than 100 wavelengths over a single fiber. Conventional link and path formulations for the RWA problem are inefficient due to the inherent symmetry in...
Provided by North Carolina State University
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White Papers
Hybrid FRR/p-Cycle MPLS Link Protection Design
February 18, 2011, 12:00am PST
Survivable MPLS technologies are crucial in ensuring reliable communication services. The Fast ReRoute (FRR) mechanism has been standardized to achieve fast local repair of Label Switched Paths...
Provided by North Carolina State University
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White Papers
A New Framework for GLIF Interdomain Resource Reservation Architecture (GIRRA)
March 5, 2010, 12:00am PST
Many existing and emerging Scientific high-end applications (E-science) require end-to-end circuits interconnecting Grid resources for large data transfers. A few advanced Networks, mainly...
Provided by North Carolina State University
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White Papers
On the Utilization of ID-Based Connected Dominating Sets for Mobile Ad Hoc Networks
October 1, 2010, 12:00am PDT
The design of routing protocols based on Connected Dominating Set (CDS) has been recognized as a suitable approach for routing in Mobile Ad hoc NETworks (MANETs). There are multiple ways to form a...
Provided by North Carolina State University
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White Papers
Max-Contribution: On Optimal Resource Allocation in Delay Tolerant Networks
December 22, 2009, 12:00am PST
This is by far the first paper considering joint optimization of link scheduling, routing and replication for Disruption-Tolerant Networks (DTNs). The optimization problems for resource allocation...
Provided by North Carolina State University
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White Papers
Optimal Max-Min Fair Resource Allocation in Multihop Relay-Enhanced WiMAX Networks
July 12, 2011, 12:00am PDT
In this paper, an optimal resource allocation scheme is proposed for WiMAX networks enhanced with non-transparent Relay Stations (RSs). The authors first focus on two-hop relaying networks, since...
Provided by North Carolina State University
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White Papers
Tuning Up the Performance of Constant-Time Distributed Scheduling Algorithms Via Majorization
September 27, 2007, 12:00am PDT
Scheduling algorithms assign contention probability for each link in Wireless Ad Hoc Networks and plays a key role in deciding the system performance. Recently, many low-cost distributed...
Provided by North Carolina State University
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White Papers
Invariance Property of Isotropic Random Walk Mobility Patterns in Mobile Ad-Hoc Networks
September 28, 2007, 12:00am PDT
The class of isotropic random walk mobility models, including Random Direction mobility model, Random Walk mobility model and Brownian motion mobility model, has been widely used in the study of...
Provided by North Carolina State University
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White Papers
Impact of Super-Diffusive Behavior on Routing Performance in Delay Tolerant Networks
September 28, 2007, 12:00am PDT
Motivated by the recent findings of super-diffusive patterns in mobility traces, the authors investigate the impact of super-diffusive behavior of mobile nodes on contact-based metrics and...
Provided by North Carolina State University
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White Papers
Exploiting Heterogeneity in Mobile Opportunistic Networks: An Analytic Approach
April 23, 2010, 12:00am PDT
Heterogeneity arises in a wide range of scenarios in mobile opportunistic networks and is one of key factors that govern the performance of packet forwarding algorithms. While the heterogeneity...
Provided by North Carolina State University
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White Papers
A Distributed Wake-Up Scheduling for Opportunistic Forwarding in Wireless Sensor Networks
July 31, 2010, 12:00am PDT
In Wireless Sensor Networks (WSNs), sensor nodes are typically subjected to energy constraints and often prone to topology changes. While duty cycling has been widely used for energy conservation...
Provided by North Carolina State University
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White Papers
Smart Sleep: Sleep More to Reduce Delay in Duty-Cycled Wireless Sensor Networks
January 13, 2011, 12:00am PST
A Simple Random Walk (SRW) has been considered as an effective forwarding method for many applications in Wireless Sensor Networks (WSNs) due to its desirable properties. However, a critical...
Provided by North Carolina State University
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White Papers
Exploiting Heterogeneity to Prolong the Lifetime of Large-Scale Wireless Sensor Networks
February 10, 2011, 12:00am PST
In Wireless Sensor Networks (WSNs), sensor nodes are typically power-constrained with limited lifetime, and thus it is necessary to know how long the network sustains its networking operations....
Provided by North Carolina State University
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White Papers
Crossing Over the Bounded Domain: From Exponential to Power-Law Inter-Meeting Time in Mobile Ad-Hoc Networks
December 15, 2008, 12:00am PST
Inter-meeting time between mobile nodes is one of the key metrics in a Mobile Ad-hoc NETwork (MANET) and central to the end-to-end delay of forwarding algorithms. It is typically assumed to be...
Provided by North Carolina State University
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White Papers
Super-Diffusive Behavior of Mobile Nodes and Its Impact on Routing Protocol Performance
June 28, 2009, 12:00am PDT
Mobility is the most important component in Mobile Ad-hoc NETworks (MANETs) and Delay Tolerant Networks (DTNs). In this paper, the authors first investigate numerous GPS mobility traces of human...
Provided by North Carolina State University
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White Papers
From Jammer to Gambler: Modeling and Detection of Jamming Attacks Against Time-Critical Traffic
March 20, 2011, 12:00am PDT
Time-critical wireless applications in emerging network systems, such as e-healthcare and smart grids, have been drawing increasing attention in both industry and academia. The broadcast nature of...
Provided by North Carolina State University
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White Papers
Review and Evaluation of Security Threats on the Communication Networks in the Smart Grid
August 4, 2010, 12:00am PDT
The smart grid, generally referred to as the next-generation power electric system, relies on robust communication networks to provide efficient, secure, and reliable information delivery. Thus,...
Provided by North Carolina State University
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White Papers
On Order Gain of Backoff Misbehaving Nodes in CSMA/CA-Based Wireless Networks
January 3, 2010, 12:00am PST
Backoff misbehavior, in which a wireless node deliberately manipulates its backoff time, can induce significant network problems, such as severe unfairness and denial-of-service. Although great...
Provided by North Carolina State University
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White Papers
ART: An Asymmetric and Reliable Transport Mechanism for Wireless Sensor Networks
January 1, 2011, 12:00am PST
Many applications developed for Wireless Sensor Networks (WSNs) demand for Reliable communication service, since majority of these applications are event-critical applications. There has been a...
Provided by North Carolina State University
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White Papers
Topology Stability Analysis and Its Application in Hierarchical Mobile Ad Hoc Networks
January 1, 2011, 12:00am PST
The hierarchical architecture has been proven effective for solving the scalability problems in large-scale ad hoc networks. The stability of the hierarchical architecture is a key factor in...
Provided by North Carolina State University
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White Papers
Efficient Distribution of Key Chain Commitments for Broadcast Authentication in Distributed Sensor Networks
January 1, 2011, 12:00am PST
A distributed sensor network usually consists of one or several computationally powerful nodes called base stations and a large amount of inexpensive, low capacity nodes called sensors (or sensor...
Provided by North Carolina State University
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White Papers
A Comparison Performance Analysis of QoS WLANs: Approaches With Enhanced Features
July 13, 2007, 12:00am PDT
The main contribution of this paper is to compare and enhance known methods for performance analysis of the IEEE 802.11eMAC layer, such as the use of Markov chains, queuing theory, and...
Provided by North Carolina State University
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