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Mission Statement
TechRepublic's ITPapers is the Web's largest library of free technical IT white papers, webcasts, and case studies. Covering IT categories including Data Management, IT Management, Networking, Communications, Enterprise Applications, Storage, Security and much more, TechRepublic's White Paper Directory is the best source for technical white papers and IT information.
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White Papers
SIR Distribution Analysis in Cellular Networks Considering the Joint Impact of Path-Loss, Shadowing and Fast Fading
Nov 2011
In this paper, the authors propose an analysis of the joint impact of path-loss, shadowing and fast fading on cellular networks. Two analytical methods are developed to express the outage...
Provided by Springer
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White Papers
Beamforming Techniques for Enabling Spatialreuse in MCCA 802.11s Networks
Nov 2011
The authors address the problem of Co-Channel Interference (CCI) in wireless mesh networks based on the IEEE802.11s extension. The carrier sensing mechanism deployed in those networks...
Provided by Springer
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White Papers
Improved and Weighted Sum Rate Maximization for Successive Zero-Forcing in Multiuser MIMO Systems
Feb 2012
The authors propose an improved algorithm for optimizing the transmit covariance matrices for Successive Zero-Forcing (SZF) precoding in multiple-input multiple-output systems. They use a...
Provided by Springer
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White Papers
Multistage Quadrature Sigma-Delta Modulators for Reconfigurable Multi-Band Analog-Digital Interface in Cognitive Radio Devices
Feb 2012
Nowadays, a growing number of parallel wireless communication standards, together with ever-increasing traffic amounts, create a widely acknowledged need for novel radio solutions, such as...
Provided by Springer
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White Papers
Average Minimum Transmit Power to Achieve SINR Targets: Performance Comparison of Various User Selection Algorithms
Nov 2011
In multi-user communication from one Base Station (BS) to multiple users, the problem of minimizing the transmit power to achieve some target-guaranteed performance (rates) at users has been well...
Provided by Springer
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White Papers
PAPR Reduction of OFDM Signals Using PTS: A Real-Valued Genetic Approach
Nov 2011
The Partial Transmit Sequences (PTS) scheme achieves an excellent Peak-to-Average Power Ratio (PAPR) reduction performance of Orthogonal Frequency Division Multiplexing (OFDM) signals at the cost...
Provided by Springer
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White Papers
Constrained Power Allocation Schemes for Coordinated Base Station Transmission Using Block Diagonalization
Nov 2011
In this paper, the authors propose several power allocation schemes in a coordinated base station downlink transmission with per antenna and per base station power constraints. Block...
Provided by Springer
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White Papers
A Fast Iterative Localized Re-Authentication Protocol for UMTS-WLAN Heterogeneous Mobile Communication Networks
Nov 2011
UMTS-WLAN heterogeneous mobile networks allow a single mobile user with different radio technologies to access different mobile networks, but how to secure such inter-working networks and provide...
Provided by Springer
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White Papers
Impact of the Environment and the Topology on the Performance of Hierarchical Body Area Networks
Nov 2011
Personal area networks and, more specifically, Body Area Networks (BANs) are key building blocks of future generation networks and of the Internet of Things as well. In this paper, the authors...
Provided by Springer
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White Papers
Two-Way Relaying Using Constant Envelope Modulation and Phase-Superposition-Phase-Forward
Nov 2011
In this paper, the authors propose the idea of Phase-Superposition-Phase-Forward (PSPF) relaying for 2-way 3-phase cooperative network involving constant envelope modulation with discriminator...
Provided by Springer
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White Papers
Slotted Aloha With Multi-AP Diversity and APS Transmit Beamforming
Nov 2011
Slotted Aloha is an effective random access protocol and can also be an important element of more advanced media access protocols. This paper investigates slotted Aloha in a radio environment with...
Provided by Springer
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White Papers
Mobile User-Preference-Based Data Dissemination on Mobile P2P Networks
Nov 2011
A considerable number of studies have been performed recently on MObile Peer-to-peer NETworks (MOPNETs), as the number of services based on mobile devices has increased. However, existing studies...
Provided by Springer
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White Papers
Clustering and OFDMA-Based MAC Protocol (COMAC) for Vehicular Ad Hoc Networks
Nov 2011
The IEEE community is working on the wireless access in vehicular environments as a main technology for vehicular ad hoc networks. The Medium Access Control (MAC) protocol of this system known as...
Provided by Springer
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White Papers
The Impact of Spatial Correlation on the Statistical Properties of the Capacity of Nakagami-M Channels With MRC and EGC
Nov 2011
In this paper, the authors have studied the statistical properties of the instantaneous channel capacity of spatially correlated Nakagami-m channels for two different diversity combining methods,...
Provided by Springer
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White Papers
Minimum-Length Scheduling With Rate Control in Wireless Networks: A Shortest Path Approach
Dec 2011
In this paper, the minimum-length scheduling problem in wireless networks is studied, where each source of traffic has a finite amount of data to deliver to its corresponding destination. The...
Provided by Springer
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White Papers
Hidden Node Aware Routing Method Using Highsensitive Sensing Device for Multi-Hop Wireless Mesh Network
Oct 2011
Throughput maximization is one of the main challenges in multi-hop Wireless Mesh Network (WMN). Throughput of the multi-hop WMN network seriously degrades due to the presence of the hidden node....
Provided by Springer
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White Papers
A New and Efficient Adaptive Scheduling Packets for the Uplink Traffic in WiMAX Networks
Nov 2011
In this paper, an adaptive scheduling packets algorithm for the uplink traffic in WiMAX networks is proposed. The proposed algorithm is designed to be completely dynamic, mainly in networks that...
Provided by Springer
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White Papers
Minimum Decoding Trellis Length and Truncation Depth of Wrap-Around Viterbi Algorithm for TBCC in Mobile WiMAX
Nov 2011
The performance of the wrap-around Viterbi decoding algorithm with finite truncation depth and fixed decoding trellis length is investigated for tail-biting convolutional codes in the mobile WiMAX...
Provided by Springer
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White Papers
Hadamard Upper Bound on Optimum Joint Decoding Capacity of Wyner Gaussian Cellular MAC
Nov 2011
This paper presents an original analytical expression for an upper bound on the optimum joint decoding capacity of Wyner Circular Gaussian Cellular Multiple Access Channel (C-GCMAC) for uniformly...
Provided by Springer
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White Papers
A New Reduced-Complexity Detection Scheme for Zero-Padded OFDM Transmissions
Oct 2011
Recently, Zero-Padding Orthogonal Frequency Division Multiplexing (ZP-OFDM) has been proposed as an alternative solution to the traditional Cyclic Prefix (CP)-OFDM, to ensure symbol recovery...
Provided by Springer
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White Papers
BOB-RED Queue Management for IEEE 802.15.4 Wireless Sensor Networks
Oct 2011
Multimedia services over resource constrained Wireless Sensor Networks (WSNs) face a performance bottleneck issue from the gateway node to the sink node. Therefore, the queue management at the...
Provided by Springer
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White Papers
Dynamic Tuning of the IEEE 802.11 Distributed Coordination Function to Derive a Theoretical Throughput Limit
Oct 2011
IEEE 802.11 is the most popular and widely used standard for wireless local area network communication. It has attracted countless numbers of studies devoted to improving the performance of the...
Provided by Springer
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White Papers
Optimized Combination Model and Algorithm of Parking Guidance Information Configuration
Oct 2011
Operators of Parking Guidance and Information (PGI) systems often have difficulty in providing the best car park availability information to drivers in periods of high demand. A new PGI...
Provided by Springer
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White Papers
A Network Resource Availability Model for IEEE802.11a/b-Based WLAN Carrying Different Service Types
Oct 2011
Operators of integrated wireless systems need to have knowledge of the resource availability in their different access networks to perform efficient admission control and maintain good quality of...
Provided by Springer
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White Papers
Hop-Distance Relationship Analysis With Quasi-UDG Model for Node Localization in Wireless Sensor Networks
Oct 2011
In Wireless Sensor Networks (WSNs), location information plays an important role in many fundamental services which includes geographic routing, target tracking, location-based coverage, topology...
Provided by Springer
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White Papers
Cross-Layer Based Adaptive Wireless Traffic Control for Per-Flow and Per-Station Fairness
Sep 2011
In the IEEE 802.11 wireless LANs, the bandwidth is not fairly shared among stations due to the Distributed Coordination Function (DCF) mechanism in the IEEE 802.11 MAC protocol. It introduces the...
Provided by Springer
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White Papers
Sleep/wake Scheduling Scheme for Minimizing End-to-End Delay in Multi-Hop Wireless Sensor Networks
Oct 2011
The authors present a sleep/wake schedule protocol for minimizing end-to-end delay for event driven multi-hop wireless sensor networks. In contrast to generic sleep/wake scheduling schemes, their...
Provided by Springer
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White Papers
Novel Low-PAPR Parallel FSOK Transceiver Design for MC-CDMA System Over Multipath Fading Channels
Nov 2011
A low Peak-to-Average Power Ratio (PAPR) transceiver using a new parallel Frequency-Shift Orthogonal Keying (FSOK) technique is proposed for the multiuser uplink Multi-Carrier CDMA (MC-CDMA)...
Provided by Springer
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White Papers
IDEA1: A Validated SystemC-Based System-Level Design and Simulation Environment for Wireless Sensor Networks
Feb 2012
This paper presents IDEA1, a SystemC-based system-level design and simulation framework for WSNs. It allows the performance evaluation (e.g., packet delivery rate, transmission latency and energy...
Provided by Springer
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White Papers
Reconfigurable Antennas and Configuration Selection Methods for MIMO Ad Hoc Networks
Dec 2011
In this paper, the authors quantify the performance enhancements that can be provided by reconfigurable antennas in an ad hoc network where all nodes employ multiple input multiple output...
Provided by Springer
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White Papers
Performance Analysis of MIMO-SESS With Alamouti Scheme Over Rayleigh Fading Channels
Dec 2011
Self-Encoded Spread Spectrum (SESS) is a novel modulation technique that acquires its spreading sequence from the random input data stream rather than through the use of the traditional...
Provided by Springer
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White Papers
Call Admission Control With Heterogeneous Mobile Stations in Cellular/WLAN Interworking Systems
Oct 2011
Although different Call Admission Control (CAC) schemes have been proposed for cellular-wireless local area network (WLAN) inter-working systems, no studies consider Mobile Stations (MSs) only...
Provided by Springer
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White Papers
Enhancing Role-Based Trust Management With a Reputation System for MANETs
Sep 2011
The authors start with Role-Based Trust Management (RBTM) and address some of the challenges associated with using RBTM in Mobile Ad hoc NETworks (MANETs). They, then enhance RBTM with Reputation...
Provided by Springer
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White Papers
Performance Analysis for Optimum Transmission and Comparison With Maximal Ratio Transmission for MIMO Systems With Cochannel Interference
Sep 2011
This paper presents the performance analysis of Multiple-Input/Multiple-Output (MIMO) systems with Quadrature Amplitude Modulation (QAM) transmission in the presence of Co-Channel Interference...
Provided by Springer
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White Papers
Implementation and Investigation of Circular Slot UWB Antenna With Dual-Band-Notched Characteristics
Oct 2011
The design and analysis of an ultra wideband aperture antenna with dual-band-notched characteristics are presented. The proposed antenna consists of a circular ring exciting stub on the front side...
Provided by Springer
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White Papers
A Scalable Multi-Sink Gradient-Based Routing Protocol for Traffic Load Balancing
Oct 2011
Wireless sensor networks have been assumed to consist of a single sink and multiple sensor nodes which do not have mobility. In these networks, sensor nodes near the sink dissipate their energy so...
Provided by Springer
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White Papers
Transmission Scheduling for Wireless Mesh Networks With Temporal Reuse
Sep 2011
Link-assigned transmission schedules with timeslot reuse by multiple links in both the space and time domains are investigated in this paper for stationary multihop wireless mesh networks with...
Provided by Springer
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White Papers
On the Capacity of Rayleigh-Fading Correlated Spectrum Sharing Networks
Sep 2011
Recently, substantial attention has been paid to improve the spectral efficiency of communication setups using different spectrum sharing techniques. This paper aims to study the capacity of...
Provided by Springer
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White Papers
Frequency Domain Equalization Space-Time Block-Coded CDMA Transmission System
Sep 2011
In this paper, the authors propose a Space-Time Block-Coded (STBF) CDMA transmission system suitable for use with Frequency Domain Equalization (FDE) algorithms. They illustrate the FDE by...
Provided by Springer
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White Papers
The Village Telco Project: A Reliable and Practical Wireless Mesh Telephony Infrastructure
Sep 2011
VoIP (Voice over IP) over mesh networks could be a potential solution to the high cost of making phone calls in most parts of Africa. The Village Telco (VT) is an easy to use and scalable VoIP...
Provided by Springer
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White Papers
Social-Aware Delay Tolerant Networking for Mobile-to-Mobile File Sharing
Mar 2011
Peer-To-Peer (P2P) overlay networks and Mobile Ad-hoc NETworks (MANETs) share many key characteristics such as self-organization and decentralization; they also face the crucial challenge of...
Provided by John Wiley & Sons
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White Papers
Secure Routing for Structured Peer-to-Peer Overlay Networks
Jan 2011
Structured peer-to-peer overlay networks provide a substrate for the construction of large-scale, decentralized applications, including distributed storage, group communication, and content...
Provided by Rice University
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White Papers
On the Source Switching Problem of Peer-to-Peer Streaming
Feb 2010
Peer-To-Peer (P2P) streaming has been proved a popular and efficient paradigm of Internet media streaming. In some applications, such as an Internet video distance education system, there are...
Provided by Reed Elsevier
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White Papers
Optimal Channel Choice for Collaborative Ad-Hoc Dissemination
Jul 2009
Collaborative ad-hoc dissemination of information has been proposed as an efficient means to disseminate information among devices in a wireless ad-hoc network. Devices help in forwarding the...
Provided by Technical University of Denmark
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White Papers
Message Fragmentation in Disruptive Networks
Aug 2009
In networks with unstable links fragmentation of a message into smaller pieces before transmission can reduce message blocking due to disrupted transmission and increase the utilization of contact...
Provided by Nokia
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White Papers
Deterministic Backoff: Towards Efficient Polling for IEEE 802.11e HCCA in Wireless Home Networks
Jul 2011
The emergence of video streaming over wireless home networks creates renewed interests in design and analysis of new MAC protocols towards QoS provisioning for video applications. IEEE 802.11e...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
On the Vulnerabilities of CSI in MIMO Wireless Communication Systems
Jul 2011
Multiple-Input Multiple-Output (MIMO) technologies are a popular choice for emerging wireless systems due to their promised gains in throughput and reliability. In order to realize any gains over...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Coverage and Connectivity in Duty-Cycled Wireless Sensor Network for Event Monitoring
Jul 2011
In duty-cycled Wireless Sensor Networks (WSNs) for stochastic event monitoring, existing efforts are mainly concentrated on energy-efficient scheduling of sensor nodes to guarantee the coverage...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Stability Analysis of Reservation-Based Scheduling Policies in Wireless Networks
Jul 2011
A major challenge in wireless networks is the ability to maximize the throughput. High throughput in a wireless network requires a relatively low complex scheduling policy with a provable...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
LLSiWSN: A New Range-Free Localization Algorithm for Large Scale Wireless Sensor Networks
Sep 2011
This paper is proposed a range-free localization algorithm in WSN technology. Effective use some useful information for localization algorithm during sensor node deploy process, to avoid...
Provided by Crown
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White Papers
Minimizing Interference Through Channel Assignment in Multiradio Wireless Mesh Networks
Aug 2011
Breadth First Search Channel Assignment (BFSCA) is a hybrid channel assignment algorithm that utilizes multiple radio interfaces to improve the throughput and minimize the interference within the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Reliability Analysis for Wireless Sensor Networks Considering Environmental Parameters Using MATLAB
Mar 2011
Communication probability depends on various soft and hard parameters. It depends on the link and communications parameters as well as device reliability. Communication probability for wireless...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
The Design of Wireless Remote Monitoring System of Water Supply Based on GPRS
Apr 2011
A wireless remote monitoring system of water supply based on GPRS had been designed and realized, and it has the advantage of low cost, easy to realize and convenient to maintain,etc. Firstly, the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Research of Industrial Wireless Network WIA-PA Multi-Path Routing Protocol WMDSR
Apr 2011
WIA-PA network is an emerging industrial wireless networks for process automation, the important characteristic of which are high reliability, stability, real-time. According to those...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
GPU-Based Architectures and Their Benefit for Accurate and Efficient Wireless Network Simulations
Jun 2011
In recent years, a trend towards the usage of physical layer models with increased accuracy can be observed within the wireless network community. This trend has several reasons. The consideration...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Annealing Heuristic for Fair Wireless Channel Allocation by Exponential Ordered-Ordered Weighted Averaging Operator Maximization
Jun 2011
Wireless Channel Allocation (WCA) is a relevant resource allocation problem that cannot be handled by a simple maximization approach. In such a case, users can often be excluded from receiving...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
The Design of Intelligent Household System Based on Wireless Communications
Apr 2011
With the rapid development of modern technology and the improvement of people's living standards, the idea of intelligent household system has been put forward and widely used home and abroad, and...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Noncooperative Distributed MMSE Schemes for AF SIMO Wireless Relay Networks
Mar 2011
This paper presents a non-cooperative distributed Amplify-and-Forward (AF) Single-Input Multiple-Output (SIMO) wireless relay networks under two adverse wireless communication environments: node...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Interference-Aware Real-Time Flow Scheduling for Wireless Sensor Networks
May 2011
With the emergence of wireless sensor networks, an enabling communication technology for distributed real-time systems, the authors face the critical challenge of meeting the end-to-end deadlines...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A New Routing Algorithm to Reduce Consumed Energy in Wireless Sensor Networks
Mar 2011
Topology control and energy saving is one of the most important problems in wireless sensor networks because of special property of these networks such as limited transmission range, limited power...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Traffic-Aware Spectrum Assignment in Wireless Networks
Jul 2011
Radio frequency spectrum is a finite and scarce resource. However, past research efforts usually assume orthogonal channels of fixed bandwidth, prohibiting the effective use of the spectrum....
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Distributed Coverage in Wireless Ad Hoc and Sensor Networks by Topological Graph Approaches
Aug 2011
Coverage problem is a fundamental issue in wireless ad hoc and sensor networks. Previous techniques for coverage scheduling often require accurate location information or range measurements, which...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
GPS-Free, Boundary-Recognition-Free, and Reliable Double-Ruling-Based Information Brokerage Scheme in Wireless Sensor Networks
Aug 2011
The authors study the information brokerage schemes in wireless sensor networks, which allow consumers to obtain data from producers by replicating and retrieving data in a certain set of sensors,...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Modeling and Optimization of Medium Access in CSMA Wireless Networks With Topology Asymmetry
Aug 2011
Recently, the Carrier Sense Multiple Access (CSMA) based protocol IEEE 802.11 Distributed Coordination Function (DCF) has been widely used for medium access control in non-single-cell wireless...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Side Channel: Bits Over Interference
Aug 2011
Interference is a critical issue in wireless communications. In a typical multiple-user environment, different users may severely interfere with each other. Coordination among users therefore is...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Optimization Based Distributed Algorithms for Mobile Data Gathering in Wireless Sensor Networks
Aug 2011
Recent advances have shown a great potential of mobile data gathering in wireless sensor networks, where one or more mobile collectors are employed to collect data from sensors via short-range...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Tracking Mobile Users in Wireless Networks Via Semi-Supervised Co-Localization
Aug 2011
Recent years have witnessed growing popularity of sensor and sensor-network technologies, supporting important practical applications. One of the fundamental issues is how to accurately locate a...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Study of Exploration of Heterogeneous Personal Data Collected From Mobile Devices and Web Services
May 2011
This paper presents a study on the exploration of heterogeneous personal data that are collected from daily life. Most lifelog research has focused on the capture of personal logs and personal...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Comparison Evaluation of Single and Multi Mobile Events Wireless Sensor Networks Using AODV Protocol
Apr 2011
In this paper, the authors evaluate the performance of WSNs for single and multi mobile events using TwoRayGround radio model and AODV protocol. They consider goodput and routing efficiency...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Utilization of Markov Model and Non-Parametric Belief Propagation for Activity-Based Indoor Mobility Prediction in Wireless Networks
Apr 2011
A foremost objective in wireless networks is to facilitate the communication of mobile users and the widespread tracking and prediction of their mobility regardless of their point of attachment to...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Mobile Voronoi Diagrams for Traffic Monitoring Under Bad Visibility Conditions
Jun 2011
A semiautomatic management of traffic scenes displays a large diversity of mobile data arising from usual Computer Vision techniques. The mobile nature of inputs requires the combination of...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Visibility-Based Coverage of Mobile Sensors in Non-Convex Domains
Jun 2011
The area coverage problem of mobile sensor networks has attracted much attention recently, as mobile sensors find many important applications in remote and hostile environments. However, the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Meeting of Randomly Moving Messages in a Mobile Ad-Hoc Network
Apr 2011
Random walks can be used to design a topology-adaptive traversal scheme, in order to solve problems in a completely decentralized manner in dynamic systems, such as sensor or ad hoc networks, in...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Adaptive Collaborative Sensing Using Mobile Phones and Stationary Sensors
Jan 2011
Wireless Sensors Networks (WSNs) have been widely deployed for habitat monitoring, structure monitoring, fire detection and object tracking applications. Although WSNs can provide continuous...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Mobile Attacks and Defense
Aug 2011
When the author was growing up, phones were phones. One could call other phones and talk to people; they could call one. That was it. With the spread of smartphones, things have certainly changed....
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Controlled Mobility Sensor Networks for Target Tracking Using Ant Colony Optimization
Jul 2011
In mobile sensor networks, it is important to manage the mobility of the nodes in order to improve the performances of the network. This paper addresses the problem of single target tracking in...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
WBroximity: Mobile Participatory Sensing for WLAN- and Bluetooth-Based Positioning
Jan 2010
Recently, there has been much interest in positioning based on the widespreading WLAN technology, notably observed in the increasing number of hotspots and mobile devices equipped with WLAN...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Swarm Intelligent Routing Solution for Wireless Sensor Networks
Jan 2010
In this paper, the authors have developed a Swarm Routing Protocol that uses Swarm Autonomous Routing Algorithm (SARA) for Wireless Sensor Networks (WSN) and developed WSN prototypes...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Characterizing Traffic Generated With Laptop Computers and Mobile Handsets in GPRS/UMTS Core Networks
Jan 2010
This paper presents a recent profile of IP data traffic in GPRS/UMTS core networks. The analysis in this paper is based on Layer 3 and 4 headers of packets which the authors measured in two...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Handover Coordination With a Relay-Based Design for Heterogeneous Wireless Networks
Jan 2010
Future wireless networks will coexist and combine resources over an IP-based infrastructure for ubiquitous connection support. Thus, to support non-perceptible connection migration between the...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Clustering and OFDMA-Based MAC Protocol (COMAC) for Vehicular Ad Hoc Networks
Nov 2011
The IEEE community is working on the wireless access in vehicular environments as a main technology for vehicular ad hoc networks. The Medium Access Control (MAC) protocol of this system known as...
Provided by Springer
-
White Papers
The Impact of Spatial Correlation on the Statistical Properties of the Capacity of Nakagami-M Channels With MRC and EGC
Nov 2011
In this paper, the authors have studied the statistical properties of the instantaneous channel capacity of spatially correlated Nakagami-m channels for two different diversity combining methods,...
Provided by Springer
-
White Papers
Minimum-Length Scheduling With Rate Control in Wireless Networks: A Shortest Path Approach
Dec 2011
In this paper, the minimum-length scheduling problem in wireless networks is studied, where each source of traffic has a finite amount of data to deliver to its corresponding destination. The...
Provided by Springer
-
White Papers
Hidden Node Aware Routing Method Using Highsensitive Sensing Device for Multi-Hop Wireless Mesh Network
Oct 2011
Throughput maximization is one of the main challenges in multi-hop Wireless Mesh Network (WMN). Throughput of the multi-hop WMN network seriously degrades due to the presence of the hidden node....
Provided by Springer
-
White Papers
A New and Efficient Adaptive Scheduling Packets for the Uplink Traffic in WiMAX Networks
Nov 2011
In this paper, an adaptive scheduling packets algorithm for the uplink traffic in WiMAX networks is proposed. The proposed algorithm is designed to be completely dynamic, mainly in networks that...
Provided by Springer
-
White Papers
Minimum Decoding Trellis Length and Truncation Depth of Wrap-Around Viterbi Algorithm for TBCC in Mobile WiMAX
Nov 2011
The performance of the wrap-around Viterbi decoding algorithm with finite truncation depth and fixed decoding trellis length is investigated for tail-biting convolutional codes in the mobile WiMAX...
Provided by Springer
-
White Papers
Hadamard Upper Bound on Optimum Joint Decoding Capacity of Wyner Gaussian Cellular MAC
Nov 2011
This paper presents an original analytical expression for an upper bound on the optimum joint decoding capacity of Wyner Circular Gaussian Cellular Multiple Access Channel (C-GCMAC) for uniformly...
Provided by Springer
-
White Papers
A New Reduced-Complexity Detection Scheme for Zero-Padded OFDM Transmissions
Oct 2011
Recently, Zero-Padding Orthogonal Frequency Division Multiplexing (ZP-OFDM) has been proposed as an alternative solution to the traditional Cyclic Prefix (CP)-OFDM, to ensure symbol recovery...
Provided by Springer
-
White Papers
BOB-RED Queue Management for IEEE 802.15.4 Wireless Sensor Networks
Oct 2011
Multimedia services over resource constrained Wireless Sensor Networks (WSNs) face a performance bottleneck issue from the gateway node to the sink node. Therefore, the queue management at the...
Provided by Springer
-
White Papers
Dynamic Tuning of the IEEE 802.11 Distributed Coordination Function to Derive a Theoretical Throughput Limit
Oct 2011
IEEE 802.11 is the most popular and widely used standard for wireless local area network communication. It has attracted countless numbers of studies devoted to improving the performance of the...
Provided by Springer
-
White Papers
Optimized Combination Model and Algorithm of Parking Guidance Information Configuration
Oct 2011
Operators of Parking Guidance and Information (PGI) systems often have difficulty in providing the best car park availability information to drivers in periods of high demand. A new PGI...
Provided by Springer
-
White Papers
A Network Resource Availability Model for IEEE802.11a/b-Based WLAN Carrying Different Service Types
Oct 2011
Operators of integrated wireless systems need to have knowledge of the resource availability in their different access networks to perform efficient admission control and maintain good quality of...
Provided by Springer
-
White Papers
Hop-Distance Relationship Analysis With Quasi-UDG Model for Node Localization in Wireless Sensor Networks
Oct 2011
In Wireless Sensor Networks (WSNs), location information plays an important role in many fundamental services which includes geographic routing, target tracking, location-based coverage, topology...
Provided by Springer
-
White Papers
Cross-Layer Based Adaptive Wireless Traffic Control for Per-Flow and Per-Station Fairness
Sep 2011
In the IEEE 802.11 wireless LANs, the bandwidth is not fairly shared among stations due to the Distributed Coordination Function (DCF) mechanism in the IEEE 802.11 MAC protocol. It introduces the...
Provided by Springer
-
White Papers
Sleep/wake Scheduling Scheme for Minimizing End-to-End Delay in Multi-Hop Wireless Sensor Networks
Oct 2011
The authors present a sleep/wake schedule protocol for minimizing end-to-end delay for event driven multi-hop wireless sensor networks. In contrast to generic sleep/wake scheduling schemes, their...
Provided by Springer
-
White Papers
Novel Low-PAPR Parallel FSOK Transceiver Design for MC-CDMA System Over Multipath Fading Channels
Nov 2011
A low Peak-to-Average Power Ratio (PAPR) transceiver using a new parallel Frequency-Shift Orthogonal Keying (FSOK) technique is proposed for the multiuser uplink Multi-Carrier CDMA (MC-CDMA)...
Provided by Springer
-
White Papers
IDEA1: A Validated SystemC-Based System-Level Design and Simulation Environment for Wireless Sensor Networks
Feb 2012
This paper presents IDEA1, a SystemC-based system-level design and simulation framework for WSNs. It allows the performance evaluation (e.g., packet delivery rate, transmission latency and energy...
Provided by Springer
-
White Papers
Reconfigurable Antennas and Configuration Selection Methods for MIMO Ad Hoc Networks
Dec 2011
In this paper, the authors quantify the performance enhancements that can be provided by reconfigurable antennas in an ad hoc network where all nodes employ multiple input multiple output...
Provided by Springer
-
White Papers
Performance Analysis of MIMO-SESS With Alamouti Scheme Over Rayleigh Fading Channels
Dec 2011
Self-Encoded Spread Spectrum (SESS) is a novel modulation technique that acquires its spreading sequence from the random input data stream rather than through the use of the traditional...
Provided by Springer
-
White Papers
Call Admission Control With Heterogeneous Mobile Stations in Cellular/WLAN Interworking Systems
Oct 2011
Although different Call Admission Control (CAC) schemes have been proposed for cellular-wireless local area network (WLAN) inter-working systems, no studies consider Mobile Stations (MSs) only...
Provided by Springer
-
White Papers
Enhancing Role-Based Trust Management With a Reputation System for MANETs
Sep 2011
The authors start with Role-Based Trust Management (RBTM) and address some of the challenges associated with using RBTM in Mobile Ad hoc NETworks (MANETs). They, then enhance RBTM with Reputation...
Provided by Springer
-
White Papers
Performance Analysis for Optimum Transmission and Comparison With Maximal Ratio Transmission for MIMO Systems With Cochannel Interference
Sep 2011
This paper presents the performance analysis of Multiple-Input/Multiple-Output (MIMO) systems with Quadrature Amplitude Modulation (QAM) transmission in the presence of Co-Channel Interference...
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Implementation and Investigation of Circular Slot UWB Antenna With Dual-Band-Notched Characteristics
Oct 2011
The design and analysis of an ultra wideband aperture antenna with dual-band-notched characteristics are presented. The proposed antenna consists of a circular ring exciting stub on the front side...
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A Scalable Multi-Sink Gradient-Based Routing Protocol for Traffic Load Balancing
Oct 2011
Wireless sensor networks have been assumed to consist of a single sink and multiple sensor nodes which do not have mobility. In these networks, sensor nodes near the sink dissipate their energy so...
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Transmission Scheduling for Wireless Mesh Networks With Temporal Reuse
Sep 2011
Link-assigned transmission schedules with timeslot reuse by multiple links in both the space and time domains are investigated in this paper for stationary multihop wireless mesh networks with...
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On the Capacity of Rayleigh-Fading Correlated Spectrum Sharing Networks
Sep 2011
Recently, substantial attention has been paid to improve the spectral efficiency of communication setups using different spectrum sharing techniques. This paper aims to study the capacity of...
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Frequency Domain Equalization Space-Time Block-Coded CDMA Transmission System
Sep 2011
In this paper, the authors propose a Space-Time Block-Coded (STBF) CDMA transmission system suitable for use with Frequency Domain Equalization (FDE) algorithms. They illustrate the FDE by...
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The Village Telco Project: A Reliable and Practical Wireless Mesh Telephony Infrastructure
Sep 2011
VoIP (Voice over IP) over mesh networks could be a potential solution to the high cost of making phone calls in most parts of Africa. The Village Telco (VT) is an easy to use and scalable VoIP...
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Polarization Division Multiple Access With Polarization Modulation for LOS Wireless Communications
Sep 2011
In this paper, the authors discuss a potential multiple access and modulation scheme based on Polarized States (PS) of ElectroMagnetic (EM) waves for Line-Of-Sight (LOS) communications. The...
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Low Complexity Lattice Reduction Scheme for STBC Two-User Uplink MIMO Systems
Oct 2011
Recently, a Lattice Reduction-Aided (LRA) multiple-input multiple-output detection scheme has been proposed in junction with linear (as well as nonlinear) detectors. It is well known that these...
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A Mobile and Portable Trusted Computing Platform
Sep 2011
The mechanism of establishing trust in a computing platform is tightly coupled with the characteristics of a specific machine. This limits the portability and mobility of trust as demanded by many...
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Location Based Spectrum Sensing Evaluation in Cognitive Radio Networks
Nov 2011
This paper addresses the problem of spectrum sensing over fading channel, in which a licensee and multiple unlicensed users coexist and operate in the licensed channel in a local area. The authors...
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Clustering-Based Routing for Top-K Querying in Wireless Sensor Networks
Oct 2011
A large-scale Wireless Sensor Networks (WSNs) can be deployed for top-k querying applications. There are many top-k querying algorithms which are based on traditional routing approaches. In this...
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Cooperative Localization in Wireless Ad Hoc and Sensor Networks Using Hybrid Distance and Bearing (angle of Arrival) Measurements
Sep 2011
This paper provides the graphical properties which can ensure unique localizability in cooperative networks with hybrid distance and bearing (angle of arrival) measurements. Furthermore, within...
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On the Feasibility of a Channel-Dependent Scheduling for the SC-FDMA in 3GPP-LTE (Mobile Environment) Based on a Prioritizedbifacet Hungarian Method
Sep 2011
The authors propose a methodology based on the prioritization and opportunistic reuse of the optimization algorithm known as Hungarian method for the feasible implementation of a channel-dependent...
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Channel Length Assisted Symbol Synchronization for OFDM Systems in Multipath Fading Channels
Sep 2011
Despite the promising role of Orthogonal Frequency-Division Multiplexing (OFDM) technology in communication systems, its synchronization in multipath fading channels remains an important and...
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DSC and Universal Bit-Level Combining for HARQ Systems
Sep 2011
This paper proposes a Dempster-Shafer theory based combining scheme for Single-Input Single-Output (SISO) systems with Hybrid Automatic Retransmission reQuest (HARQ), referred to as DSC, in which...
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Multihop Relaying and Multiple Antenna Techniques: Performance Trade-Offs in Cellular Systems
Oct 2011
Two very important and active areas of wireless research are multihop relaying and multiple antenna techniques. Wireless multihop relaying can increase the aggregate network data capacity and...
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A Review on Synchronous CDMA Systems: Optimum Overloaded Codes, Channel Capacity, and Power Control
Sep 2011
This paper is a review on important issues related to Code-Division Multiple-Access (CDMA) systems such as channel capacity, power control, and optimum codes; specifically, the authors consider...
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The Promise of Downlink MU-MIMO for Highcapacity Next Generation Mobile Broadband Networks Based on IEEE 802.16 M
Sep 2011
The dramatic increase of the demand for mobile broadband services poses stringent requirements on the performance evolution of currently deployed mobile broadband networks, such as Mobile WiMAX...
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