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Hindawi Publishing
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Impact of Bimodal Traffic on Latency in Optical Burst Switching Networks
November 28, 2008, 12:00am PST
This paper analyzes the impact of bimodal traffic composition on latency in optical burst switching networks. In particular, it studies the performance degradation to short-length packets caused...
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Wireless Network Algorithms, Systems, and Applications
February 3, 2010, 12:00am PST
Advances in wireless communication and networking technologies proliferate ubiquitous infrastructure and ad hoc wireless networks, enabling a wide variety of applications ranging from environment...
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Reed-Solomon Turbo Product Codes for Optical Communications: FromCode Optimization to Decoder Design
April 22, 2008, 12:00am PDT
Turbo Product Codes (TPCs) are an attractive solution to improve link budgets and reduce systems costs by relaxing the requirements on expensive optical devices in high capacity optical transport...
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Layered Video Transmission on Adaptive OFDM Wireless Systems
June 20, 2010, 12:00am PDT
Future wireless video transmission systems will consider Orthogonal Frequency Division Multiplexing (OFDM) as the basic modulation technique due to its robustness and low complexity implementation...
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A Forward-Backward Kalman Filter-Based STBC MIMO OFDM Receiver
December 11, 2008, 12:00am PST
Orthogonal Frequency Division Multiplexing (OFDM) has emerged as a modulation scheme that can achieve high data rates over frequency selective fading channel by efficiently handling multipath...
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Scalable and Media Aware Adaptive Video Streaming Over Wireless Networks
May 6, 2008, 12:00am PDT
This paper proposes an advanced video streaming system based on scalable video coding in order to optimize resource utilization in wireless networks with retransmission mechanisms at radio...
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Joint Multiuser Detection and Optimal Spectrum Balancing for Digital Subscriber Lines
July 8, 2006, 12:00am PDT
In a Digital Subscriber Line (DSL) system with strong crosstalk, the detection and cancellation of interference signals have the potential to improve the overall data rate performance. However, as...
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Securing Embedded Smart Cameras With Trusted Computing
August 19, 2010, 12:00am PDT
Camera systems are used in many applications including video surveillance for crime prevention and investigation, traffic monitoring on highways or building monitoring and automation. With the...
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Triangular Energy-Saving Cache-Based Routing Protocol by Energy Sieving
July 5, 2011, 12:00am PDT
In wireless ad hoc networks, designing an energy-efficient routing protocol is a major issue since nodes are energy limited. To address energy issue, the authors proposed a Triangular...
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Intelligent Collaborative Event Query Algorithm in Wireless Sensor Networks
August 2, 2011, 12:00am PDT
Event query processing is a very important issue in Wireless Sensor Networks (WSNs). In order to detect event early and provide monitoring information and event query timely in WSNs, an efficient...
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Ion-6: A Positionless Self-Deploying Method for Wireless Sensor Networks
July 27, 2011, 12:00am PDT
Sensor networks are deployed to monitor the interested area. Maximizing the sensing coverage depends on effectively determining the locations of sensors. In this paper, a self-deploying method...
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SEF: A Secure, Efficient, and Flexible Range Query Scheme in Two-Tiered Sensor Networks
May 19, 2011, 12:00am PDT
Large-scale wireless sensor networks follow the two-tiered architecture, where master nodes take charge of storing data and processing queries. However, if a master node is compromised, the...
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Total Least Squares Method for Robust Source Localization in Sensor Networks Using TDOA Measurements
June 15, 2011, 12:00am PDT
The TDOA-based source localization problem in sensor networks is considered with sensor node location uncertainty. A Total Least Squares (TLSs) algorithm is developed by a linear closed-form...
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A Scalable MAC Protocol Supporting Simple Multimedia Traffic QoS in WSNs
May 25, 2011, 12:00am PDT
Wireless Sensor Networks (WSNs) are a vibrant research field for the last several years. Especially, design of MAC protocols supporting multimedia traffic QoS is recent challenging work. However,...
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A Biometric Key Establishment Protocol for Body Area Networks
May 19, 2011, 12:00am PDT
Current advances in semiconductor technology have made it possible to implant a network of biosensors inside the human body for health monitoring. In the context of a Body Area Network (BAN), the...
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A Game Theoretic Approach for Interuser Interference Reduction in Body Sensor Networks
June 30, 2011, 12:00am PDT
As a kind of small-scale Cyber-Physical Systems (CPSs), Body Sensor Networks (BSNs) can provide the pervasive, long-term, and real-time health monitoring. A high degree of Quality-of-Service (QoS)...
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Link Prediction and Route Selection Based on Channel State Detection in UASNs
July 6, 2011, 12:00am PDT
In Underwater Acoustic Sensor Networks (UASNs), data route is often disrupted by link interruption which will further lead to incorrect data transmission due to high propagation delay, Doppler...
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A Reliable and Efficient MAC Protocol for Underwater Acoustic Sensor Networks
July 12, 2011, 12:00am PDT
UnderWater Acoustic Sensor Networks (UWASNs) are playing a key role in ocean applications. Unfortunately, the efficiency of UWASNs is inferior to that of the Terrestrial Wireless Sensor Networks...
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Modeling and Performance Analysis of Energy Efficiency Binary Power Control in MIMO-OFDM Wireless Communication Systems
June 30, 2011, 12:00am PDT
The energy efficiency optimization of the binary power control scheme for MIMO-OFDM wireless communication systems is formulated, and then a global optimization solution of power allocation is...
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Quadratic Programming for TDMA Scheduling in Wireless Sensor Networks
June 29, 2011, 12:00am PDT
This paper presents a novel Multi-hop Aperiodic Scheduling (MAS) algorithm which guarantees energy-efficient data collection by Wireless Sensor Networks (WSNs) under delay constraints. Present...
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Distributed Algorithm for Traffic Data Collection and Data Quality Analysis Based on Wireless Sensor Networks
July 10, 2011, 12:00am PDT
The growing need of the real-time traffic data has spurred the deployment of large-scale dedicated monitoring infrastructure systems, which mainly consist of the use of inductive loop detectors....
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Bayesian Network-Based High-Level Context Recognition for Mobile Context Sharing in Cyber-Physical System
July 11, 2011, 12:00am PDT
With the recent proliferation of smart phones, they become useful tools to implement high-confidence cyber-physical systems. Among many applications, context sharing systems in mobile environment...
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AMobile-Beacon-Assisted Sensor Network Localization Based on RSS and Connectivity Observations
July 28, 2011, 12:00am PDT
Determining the physical positions of sensors has been a fundamental and crucial problem in Wireless Sensor Networks (WSNs). Due to the inherent characteristics of WSNs, extremely limited...
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Hybrid Data Fusion and Tracking for Positioning With GNSS and 3GPP-LTE
June 1, 2010, 12:00am PDT
Global Navigation Satellite Systems (GNSSs) can provide reliable positioning information under optimum conditions, where at least four satellites can be accessed with sufficient quality. In...
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An IEEE 802.11 EDCA Model With Support for Analysing Networks With Misbehaving Nodes
November 9, 2010, 12:00am PST
The authors present a novel model of IEEE 802.11 EDCA with support for analyzing networks with misbehaving nodes. In particular, they consider backoff misbehaviour. Firstly, they verify the model...
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Design Criteria for Hierarchical Exclusive Code with Parameter-Invariant Decision Regions for Wireless 2-Way Relay Channel
June 30, 2010, 12:00am PDT
The unavoidable parametrization of the wireless link represents a major problem of the network-coded modulation synthesis in a 2-way relay channel. Composite (hierarchical) codeword received at...
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Design and Implementation of a Lightweight Security Model to Prevent IEEE 802.11 Wireless DoS Attacks
January 20, 2011, 12:00am PST
The protection offered by IEEE 802.11 security protocols such as WEP, WPA, and WPA2 does not govern wireless control frames. The control frames are transmitted in clear-text form, and there is no...
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An Interference-Aware Admission Control Design for Wireless Mesh Networks
April 27, 2010, 12:00am PDT
In this paper, the authors present IAC, an interference aware admission control algorithm for use in wireless mesh networks. The core concept of IAC is to use a low overhead dual threshold based...
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Adaptive Resource Allocation with Strict Delay Constraints in OFDMA System
August 5, 2010, 12:00am PDT
Harsh wireless channel conditions, scarce bandwidth, and limited power resources require intelligent allocation schemes which can efficiently exploit channel variations. OFDMA is a multi-carrier...
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Spectrum Sensing for Cognitive Radios with Transmission Statistics: Considering Linear Frequency Sweeping
March 6, 2010, 12:00am PST
The spectrum sensing performance of Cognitive Radios (CRs) considering noisy signal measurements and the time domain transmission statistics of the Primary User (PU) is considered in this paper....
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On the Capacity of FSO Links over Gamma-Gamma Atmospheric Turbulence Channels Using OOK Signaling
March 26, 2010, 12:00am PDT
A new upper bound on the capacity of power- and bandwidth-constrained optical wireless links over gamma-gamma atmospheric turbulence channels with intensity modulation and direct detection is...
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Transmission Strategies in MIMO Ad Hoc Networks
June 22, 2009, 12:00am PDT
Precoding problem in Multiple-Input Multiple-Output (MIMO) ad hoc networks is addressed in this paper. Firstly, the authors consider the problem of maximizing the system mutual information under a...
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Contiguous Frequency-Time Resource Allocation and Scheduling for Wireless OFDMA Systems with QoS Support
February 24, 2009, 12:00am PST
The Orthogonal Frequency Division Multiple Access (OFDMA) scheme has been selected as a potential candidate for many emerging broadband wireless access standards. In this paper, a new joint...
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Design of Orthogonal Filtered Multitone Modulation Systems and Comparison among Efficient Realizations
December 31, 2009, 12:00am PST
The authors address the efficient realization of a Filtered Multi-Tone (FMT) modulation system and its orthogonal design. FMT modulation can be viewed as a Discrete Fourier Transform (DFT)...
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A Novel Real-Time Coal Miner Localization and Tracking System Based on Self-Organized Sensor Networks
July 11, 2010, 12:00am PDT
With the development of information technology, the authors envision that the key of improving coal mine safety is how to get real-time positions of miners. In this paper, they propose a prototype...
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Suboptimal Partial Transmit Sequence-Active Interference Cancellation with Particle Swarm Optimization
August 11, 2010, 12:00am PDT
Active Interference Cancellation (AIC) is an effective technique to provide interference avoidance feature for an Ultra-WideBand (UWB) OFDM transmitter. Partial Transmit Sequence-AIC (PTS-AIC),...
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A Next Generation Wireless Simulator Based on MIMO-OFDM: LTE Case Study
February 3, 2010, 12:00am PST
The complexity of next generation wireless systems is growing exponentially. The combination of Multiple-Input-Multiple-Output (MIMO) technology with Orthogonal Frequency Division Multiplexing...
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Positioning Based on Factor Graphs
April 16, 2007, 12:00am PDT
This paper covers location determination in wireless cellular networks based on Time Difference of Arrival (TDoA) measurements in a factor graphs framework. The resulting nonlinear estimation...
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Rain Attenuation at 58 GHz: Prediction Versus Long-Term Trial Results
December 17, 2006, 12:00am PST
Electromagnetic wave propagation research in frequency band 58GHz was started at TESTCOM in Praha due to lack of experimentally obtained results needed for a realistic calculation of quality and...
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A Variational Approach to the Modeling of MIMO Systems
March 26, 2007, 12:00am PDT
Digital communication of the Third Generation (3G) using Multi-Input Multi-Output (MIMO) is one of the important techniques used to exploit the spatial diversity in a rich scattering environment....
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Adaptive Kernel Canonical Correlation Analysis Algorithms for Nonparametric Identification Of Wiener and Hammerstein Systems
February 12, 2008, 12:00am PST
This paper treats the identification of non-linear systems that consist of a cascade of a linear channel and a nonlinearity, such as the well-known Wiener and Hammerstein systems. In particular,...
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Medium Access in Spread-Spectrum Ad-Hoc Networks With Multiuser Detection
July 22, 2008, 12:00am PDT
Conventional medium access control protocols are designed to avoid simultaneous transmissions, based on a simple collision model in the underlying physical layer. Recently, strong physical layer...
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Achieving a Realistic Notion of Time in Discrete Event Simulation
July 11, 2011, 12:00am PDT
Distributed sensor systems require clock synchronization between all sensor nodes to provide consistent view of the overall system. Owing the growing size of networks, the evaluation of the...
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Efficient Load-Aware Channel Allocation in Wireless Access Networks
March 2, 2011, 12:00am PST
Dense deployments of hybrid WLANs result in high levels of interference and low end-user throughput. Many frequency allocation mechanisms for WLANs have been proposed by a large body of previous...
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Highly Accurate Time stamping for Ethernet-Based Clock Synchronization
December 10, 2011, 12:00am PST
It is not only for test and measurement of great importance to synchronize clocks of networked devices to timely coordinate data acquisition. In this context the seek for high accuracy in...
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FloorNet: Deployment and Evaluation of a Multihop Wireless 802.11 Testbed
November 24, 2009, 12:00am PST
A lot of attention has been given to multihop wireless networks lately, but further research - in particular, through experimentation - is needed. This attention has motivated an increase in the...
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Interference-Free Wakeup Scheduling With Consecutive Constraints in Wireless Sensor Networks
October 13, 2011, 12:00am PDT
Wakeup scheduling has been widely used in Wireless Sensor Networks (WSNs), for it can reduce the energy wastage caused by the idle listening state. In a traditional wakeup scheduling, sensor nodes...
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Blind Separation of Nonstationary Sources Based on Spatial Time-Frequency Distributions
August 13, 2006, 12:00am PDT
Blind Source Separation (BSS) based on Spatial Time-Frequency Distributions (STFDs) provides improved performance over blind source separation methods based on second-order statistics, when...
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On the Duality Between MIMO Systems With Distributed Antennas and MIMO Systems With Colocated Antennas
October 28, 2007, 12:00am PDT
Multiple-Input Multiple-Output (MIMO) systems are known to offer huge advantages over single-antenna systems, both with regard to capacity and error performance. Usually, quite restrictive...
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Opportunistic SpectrumAccess in Self-Similar Primary Traffic
July 14, 2009, 12:00am PDT
The authors take a stochastic optimization approach to opportunity tracking and access in self-similar primary traffic. Based on a multiple time-scale hierarchical Markovian model, they formulate...
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Hidden Anchor: A Lightweight Approach for Physical Layer Location Privacy
May 15, 2010, 12:00am PDT
In hybrid wireless sensor networks, where trusted and un-trusted nodes coexist, it becomes important to allow trusted nodes to share information, especially, location information and prevent...
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The Effect of IntelliDrive on the Efficiency of Highway Transportation Systems
December 6, 2010, 12:00am PST
Recently, the IntelliDrive initiative has been proposed by the US Department Of Transportation (USDOT) to enhance on-road safety and efficiency. In this paper, the authors provide a mathematical...
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How Much Feedback Is Required for TDDMulti-Antenna Broadcast Channels With User Selection?
May 5, 2010, 12:00am PDT
The enormous gains in a multi-antenna transmitter broadcast channel require the Channel State Information at the Transmitter (CSIT). Although the fundamental question "How much feedback is...
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Spatial Dynamics of Indoor RadioWideband Channels
October 26, 2010, 12:00am PDT
The multipath components of super-wideband (2 - 17.2GHz) non-line-of-sight channel responses measured inside several buildings are stable along sections that are 27 cm long on average with a...
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A Novel GTS Mechanism for Reliable Multihop Transmission in the IEEE 802.15.4 Network
October 14, 2011, 12:00am PDT
The IEEE 802.15.4 standard provides Guaranteed Time Slot (GTS) mechanism for reliable transmission. GTS mechanism is suitable for transmitting time-sensitive data because it allocates time slots...
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Oblivious Neural Network Computing Via Homomorphic Encryption
June 1, 2007, 12:00am PDT
The problem of secure data processing by means of a Neural Network (NN) is addressed. Secure processing refers to the possibility that the NN owner does not get any knowledge about the processed...
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Joint Source, Channel Coding, and Secrecy
August 13, 2007, 12:00am PDT
The authors introduce the concept of joint source coding, channel coding, and secrecy. In particular, they propose two practical joint schemes: the first one is based on error-correcting...
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Design and Analysis of the First BOWS Contest
August 29, 2007, 12:00am PDT
The Break Our Watermarking System (BOWS) contest was launched in the framework of the activities carried out by the European Network of Excellence for Cryptology ECRYPT. The aim of the contest was...
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Multimedia Encryption With Joint Randomized Entropy Coding and Rotation in Partitioned Bitstream
September 11, 2007, 12:00am PDT
This paper investigates the problem of efficient multimedia data encryption. A novel methodology is proposed to achieve encryption by controlling certain operations in the data compression process...
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Transmission Error and Compression Robustness of 2D ChaoticMap Image Encryption Schemes
September 3, 2007, 12:00am PDT
This paper analyzes the robustness properties of 2D chaotic map image encryption schemes. The authors investigate the behavior of such block ciphers under different channel error types and find...
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Audio Watermarking Through Deterministic Plus Stochastic Signal Decomposition
October 1, 2007, 12:00am PDT
This paper describes an audio watermarking scheme based on sinusoidal signal modeling. To embed a watermark in an original signal (referred to as a cover signal hereafter), the following steps are...
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Anonymous Fingerprinting With Robust QIM Watermarking Techniques
October 8, 2007, 12:00am PDT
Fingerprinting is an essential tool to shun legal buyers of digital content from illegal redistribution. In fingerprinting schemes, the merchant embeds the buyer's identity as a watermark into the...
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A Survey of Homomorphic Encryption for Nonspecialists
October 24, 2007, 12:00am PDT
The goal of encryption is to ensure confidentiality of data in communication and storage processes. Recently, its use in constrained devices led to consider additional features, such as the...
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Reverse-Engineering a Watermark Detector Using an Oracle
October 22, 2007, 12:00am PDT
The Break Our Watermarking System (BOWS) contest gave researchers three months to defeat an unknown watermark, given three marked images and online access to a watermark detector. The authors...
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Secure Multiparty Computation Between Distrusted Networks Terminals
October 12, 2007, 12:00am PDT
One of the most important problems facing any distributed application over a heterogeneous network is the protection of private sensitive information in local terminals. A subfield of cryptography...
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Markov Modelling of Fingerprinting Systems for Collision Analysis
December 3, 2007, 12:00am PST
Multimedia fingerprinting, also known as robust or perceptual hashing, aims at representing multimedia signals through compact and perceptually significant descriptors (hash values). In this...
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Breaking the BOWS Watermarking System: Key Guessing and Sensitivity Attacks
August 31, 2007, 12:00am PDT
In the last decade, with the spreading of the Internet as an impressive communication tool and the appearance of advanced editing tools which can be used by almost any non-trained user, the need...
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An Efficient Objective Intelligibility Measure for Frequency Domain Scramblers
December 3, 2007, 12:00am PST
The main goal of a scrambler is to make a speech signal unintelligible via the permutation of its frequency subbands. In this paper, the authors assume a sampling frequency of 8 kHz and a filter...
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Efficient Zero-Knowledge Watermark Detection With Improved Robustness to Sensitivity Attacks
October 18, 2007, 12:00am PDT
Zero-knowledge watermark detectors presented to date are based on a linear correlation between the asset features and a given secret sequence. This detection function is susceptible of being...
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A Workbench for the BOWS Contest
October 22, 2007, 12:00am PDT
The first Break Our Watermarking System (BOWS) contest challenged researchers to remove the watermark from three given images. Participants could submit altered versions of the images to an online...
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Efficient and Syntax-Compliant JPEG 2000 Encryption Preserving Original Fine Granularity of Scalability
November 23, 2007, 12:00am PST
A novel syntax-compliant encryption primitive and an efficient syntax-compliant JPEG 2000 encryption scheme are presented in this paper. The syntax-compliant encryption primitive takes, as input,...
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Joint Encryption and Compression of Correlated Sources With Side Information
November 7, 2007, 12:00am PST
The authors propose a Joint Encryption and Compression (JEC) scheme with emphasis on application to video data. The proposed JEC scheme uses the philosophy of distributed source coding with side...
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Stochastic Image Warping for Improved Watermark Desynchronization
March 19, 2008, 12:00am PDT
The use of digital watermarking in real applications is impeded by the weakness of current available algorithms against signal processing manipulations leading to the desynchronization of the...
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Design and Evaluation of a Pressure-Based Typing Biometric Authentication System
May 16, 2008, 12:00am PDT
The design and preliminary evaluation of a Pressure sensor-based typing Biometrics Authentication System (PBAS) is discussed in this paper. This involves the integration of pressure sensors,...
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Novel Attacks on Spread-Spectrum Fingerprinting
August 7, 2008, 12:00am PDT
Spread-spectrum watermarking is generally considered to be robust against collusion attacks, and thereby suitable for digital fingerprinting. The authors have previously introduced the minority...
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Broken Arrows
August 21, 2008, 12:00am PDT
This paper makes an account of the design and investigations done for the still image watermarking technique used in the 2nd edition of the BOWS challenge. This technique is named "Broken Arrows"...
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An Efficient Watermarking Technique for the Protection of Fingerprint Images
September 11, 2008, 12:00am PDT
This paper describes an efficient watermarking technique for use to protect fingerprint images. The rationale is to embed the watermarks into the ridges area of the fingerprint images so that the...
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Experimental Assessment of the Reliability for Watermarking and Fingerprinting Schemes
November 27, 2008, 12:00am PST
The authors introduce the concept of reliability in watermarking as the ability of assessing that a probability of false alarm is very low and below a given significance level. They propose an...
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Overview on Selective Encryption of Image and Video: Challenges and Perspectives
November 24, 2008, 12:00am PST
In traditional image and video content protection schemes, called fully layered, the whole content is first compressed. Then, the compressed bitstream is entirely encrypted using a standard cipher...
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How Reed-Solomon Codes Can Improve Steganographic Schemes
November 6, 2008, 12:00am PST
The use of syndrome coding in steganographic schemes tends to reduce distortion during embedding. The more complete model comes from the wet papers and allows to lock positions which cannot be...
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