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mobile - wireless communications
(58778 results)-
White Papers
A Femtocell-Assisted Data Forwarding Protocol in Relay Enhanced LTE Networks
Sep 2011
The femtocell networks, which is a small cellular base station in home and small business environment, is an attractive solution for operators to improve indoor coverage and network capability. In...
Provided by National Taiwan University
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White Papers
The Holes Problem in Wireless Sensor Networks: A Survey
Jan 2012
Several anomalies can occur in wireless sensor networks that impair their desired functionalities i.e., sensing and communication. Different kinds of holes can form in such networks creating...
Provided by University of New South Wales
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White Papers
Wormhole-Resilient Secure Neighbor Discovery in Underwater Acoustic Networks
May 2010
Neighbor discovery is a fundamental requirement and need be done frequently in Underwater Acoustic Networks (UANs) with floating node mobility. In hostile environments, neighbor discovery is...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Traffic Inference in Anonymous MANETs
Apr 2010
The open wireless medium in a Mobile Ad-hoc NETwork (MANET) enables malicious traffic analysis to dynamically infer the network traffic pattern in hostile environments. The disclosure of the...
Provided by New Jersey Institute of Technology
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White Papers
Ring Optimal Assignment of Slot Reservations for Cyclic TDMA Protocols
Nov 2011
The authors present an algorithm to assign time slots to nodes in a TDMA network that minimizes the jitter in time slot assignments. By reducing the jitter in time slots around the TDMA frame,...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Secure Cooperative Data Storage and Query Processing in Unattended Tiered Sensor Networks
Feb 2012
The authors consider an Unattended Tiered Sensor Network (UTSN) consisting of resource-rich master nodes at the upper tier and resource-poor sensor nodes at the lower tier. Sensor nodes submit...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
LR-Seluge: Loss-Resilient and Secure Code Dissemination In Wireless Sensor Networks
May 2011
Code dissemination in wireless sensor networks refers to the process of disseminating a new code image via wireless links to all sensor nodes after they are deployed. It is desirable and often...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Fine-Grained Private Matching for Proximity-Based Mobile Social Networking
Jan 2012
Proximity-based Mobile Social Networking (PMSN) refers to the social interaction among physically proximate mobile users directly through the Bluetooth/WiFi interfaces on their smartphones or...
Provided by University of Tennessee
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White Papers
Secure Top-K Query Processing Via Untrusted Location-Based Service Providers
Jan 2012
This paper considers a novel distributed system for collaborative location-based information generation and sharing which become increasingly popular due to the explosive growth of...
Provided by Arizona State University
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White Papers
CapEst: A Measurement-Based Approach to Estimating Link Capacity in Wireless Networks
Sep 2011
Estimating link capacity in a wireless network is a complex task because the available capacity at a link is a function of not only the current arrival rate at that link, but also of the arrival...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Atomic Congestion Games on Graphs and Its Applications in Networking
Dec 2011
In this paper, the authors introduce and analyze the properties of a class of game, the Atomic Congestion Game on Graphs (ACGG), which is a generalization of the classical congestion game. In...
Provided by University of Michigan
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White Papers
Approximately Optimal Adaptive Learning in Opportunistic Spectrum Access
Jan 2012
In this paper, the authors develop an adaptive learning algorithm which is approximately optimal for an Opportunistic Spectrum Access (OSA) problem with polynomial complexity. In this OSA problem...
Provided by University of Michigan
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White Papers
Is Diversity Gain Worth the Pain: Performance Comparison Between Opportunistic Multi-Channel MAC and Single-Channel MAC
Jan 2012
In this paper, the authors analyze the delay performance of an opportunistic multi-channel medium access control scheme and compare it to that of the corresponding single channel MAC scheme. In...
Provided by University of Michigan
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White Papers
Performance and Convergence of Multi-User Online Learning
Dec 2010
The authors study the problem of allocating multiple users to a set of wireless channels in a decentralized manner when the channel qualities are time-varying and unknown to the users, and...
Provided by University of Michigan
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White Papers
Online Algorithms for the Multi-Armed Bandit Problem With Markovian Rewards
Jul 2010
The authors consider the classical multi-armed bandit problem with Markovian rewards. When played an arm changes its state in a Markovian fashion while it remains frozen when not played. The...
Provided by University of Michigan
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White Papers
Congestion Games With Resource Reuse and Applications in Spectrum Sharing
Mar 2009
In this paper, the authors consider an extension to the classical definition of Congestion Games (CG) in which multiple users share the same set of resources and their payoff for using any...
Provided by University of Michigan
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White Papers
Revenue Generation for Truthful Spectrum Auction in Dynamic Spectrum Access
May 2009
Spectrum is a critical yet scarce resource and it has been shown that dynamic spectrum access can significantly improve spectrum utilization. To achieve this, it is important to incentivize the...
Provided by Association for Computing Machinery
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White Papers
Spectrum Sharing as Congestion Games
Sep 2008
A fundamental problem in wireless networking is efficient spectrum sharing. In this paper, the authors study this problem in the context of decentralized multi-user frequency adaptation, with the...
Provided by University of Michigan
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White Papers
Competitive Analysis of Opportunistic Spectrum Access Strategies
Jan 2008
The authors consider Opportunistic Spectrum Access (OSA) strategies for a transmitter in a multichannel wireless system, where a channel may or may not be available and the transmitter must...
Provided by University of Michigan
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White Papers
The Effect of Node Density and Propagation Model on Throughput Scaling of Wireless Networks
Jan 2012
The paper has led to many studies of scaling laws for the asymptotically achievable throughput in wireless networks under a variety of network models and assumptions. Such scaling laws help one...
Provided by University of Michigan
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White Papers
Component-Based Localization in Sparse Wireless Networks
Apr 2011
Localization is crucial for wireless ad hoc and sensor networks. As the distance-measurement ranges are often less than the communication ranges for many ranging systems, most communication-dense...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Energy Minimization Via Dynamic Voltage Scaling for Real-Time Video Encoding on Mobile Devices
Feb 2012
This paper investigates the problem of minimizing energy consumption for real-time video encoding on mobile devices, by dynamically configuring the clock frequency in the CPU via the Dynamic...
Provided by Nanyang Technological University
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White Papers
Energy-Optimal Mobile Application Execution: Taming Resource-Poor Mobile Devices With Cloud Clones
Jan 2012
In this paper, the authors propose to leverage cloud computing to tame resource-poor mobile devices. Specifically, mobile applications can be executed in the mobile device (known as mobile...
Provided by Nanyang Technological University
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White Papers
Buffer and Switch: An Efficient Road-to-Road Routing Scheme for VANETs
Dec 2011
Vehicular Ad Hoc NETworks (VANETs) are getting increasing attention from academic researchers and automotive industries. Timely and cost-efficient multi-hop data delivery among vehicles is...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Lightweight Packet Scheduling Algorithms for Content Uploading From Mobile Devices to Media Cloud
Aug 2011
In this paper, the authors consider how to optimally schedule packet transmissions from mobile devices over two network interfaces when uploading content files to the media cloud. Their design...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
On File Delay Minimization for Content Uploading to Media Cloud Via Collaborative Wireless Network
Oct 2011
This paper investigates the problem of uploading user-generated content files (e.g., video captured on mobile devices) to a media cloud via a cooperative wireless network. The multi-path...
Provided by Nanyang Technological University
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White Papers
Towards Name-Based Trust and Security for Content-Centric Network
Aug 2011
Trust and security have been considered as built-in properties for future Internet architecture. Leveraging the concept of named content in recently proposed information centric network, the...
Provided by University of Michigan
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White Papers
Architecting Green Broadband Cable Access Network: Energy-Delay Trade-Off
Oct 2010
The authors propose and investigate an energy-saving algorithm for DOCSIS-3.0 cable access networks. Numerical simulations indicate a possible 17.4% energy-saving for 8000 cable modems, but also...
Provided by Nanyang Technological University
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White Papers
Cost-Efficient Transmitter/Receiver Deployment for Proactive Fault Diagnosis in All-Optical Networks
May 2008
A scalable fault management system, including fault detection and localization capability, is crucial for future all-optical networks. In the authors' previous work, they have proposed adaptive...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Formal Analysis of Passive Measurement Inference Techniques
Jan 2012
Verifying the accuracy of a passive measurements-based inference technique under all possible network scenarios is a difficult challenge - the measurement point has limited observability of events...
Provided by University of Massachusetts
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White Papers
MIND: A Distributed Multi-Dimensional Indexing System for Network Diagnosis
Jan 2012
Detecting coordinated attacks on Internet resources requires a distributed network monitoring infrastructure. Such an infrastructure will have two logically distinct elements: distributed monitors...
Provided by University of Southern California
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White Papers
Informed Mobile Prefetching
Apr 2012
Prefetching is a double-edged sword. It can hide the latency of data transfers over poor and intermittently connected wireless networks, but the costs of prefetching in terms of increased energy...
Provided by Association for Computing Machinery
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White Papers
Comprehensive Online Defect Diagnosis in On-Chip Networks
Feb 2012
The authors propose a comprehensive yet low-cost solution for online detection and diagnosis of permanent faults in on-chip networks. Using error syndrome collection and packet/flit-counting...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
On the Multicast Capacity Of Wireless Ad Hoc Networks With Network Coding
Oct 2011
In this paper, the authors study the contribution of Network Coding (NC) in improving the multicast capacity of random wireless ad hoc networks when nodes are endowed with Multi-Packet...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Architecture Support and Comparison of Three Memory Consistency Models in NoC Based Systems
Jun 2012
The authors propose a novel hardware support for three relaxed memory models, Release Consistency (RC), Partial Store Ordering (PSO) and Total Store Ordering (TSO) in Network-on-Chip (NoC) based...
Provided by KTH Royal Institute of Technology
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White Papers
Reducing Virtual-to-Physical Address Translation Overhead in Distributed Shared Memory Based Multi-Core Network-on-Chips According to Data Property
May 2012
In Network-on-Chip (NoC) based multi-core platforms, Distributed Shared Memory (DSM) preferably uses virtual addressing in order to hide the physical locations of the memories. However, this...
Provided by Reed Elsevier
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White Papers
Performance Analysis of Routing Protocol in Mobile Ad Hoc Network Using NS-2
Jan 2011
The MANET routing protocols DSDV, DSR and AODV are the most promising routing protocols. The people can be used in MANET to route packets between mobile nodes. The main objective of this paper...
Provided by MIT Publications
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White Papers
Ad Hoc Mobile Wireless Networks Routing Protocols - A Review
Jan 2012
Mobile Ad hoc NETworks (MANET) represent complex distributed systems that comprise wireless mobile nodes that can freely and dynamically self organize into arbitrary and temporary ad hoc network...
Provided by Science Publications
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White Papers
Impact of Security and Quality Attributes of 3-G Based M-Commerce Systems Based on B2C Operation
Jan 2011
A year ago, everyone was talking about the great opportunities for 3G, and accessing the Internet from one's mobile terminal. Today 3-G network has grown up. Mobile-commerce (m-commerce) systems...
Provided by MIT Publications
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White Papers
Preemptive Multipath - Adhoc on Demand Distance Vector Routing Protocol
Jan 2011
A Mobile Ad hoc NETwork (MANET) consists of a set of mobile hosts capable of communicating with each other without the assistance of base stations. The topology of ad-hoc networks changes rapidly....
Provided by MIT Publications
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Webcasts
Technology's Epic Story
Nov 2009
In this wide-ranging, thought-provoking talk from TEDxAmsterdam, Kevin Kelly muses on what technology means in the lives from its impact at the personal level to its place in the cosmos.
Provided by TED Conferences
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Webcasts
We Are All Cyborgs Now
Dec 2010
Technology is evolving people, says Amber Case, as the people become a screen-staring, button-clicking new version of homo sapiens. The presenters now rely on "External brains" (cell phones and...
Provided by TED Conferences
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Webcasts
Cracking Stuxnet, a 21st-Century Cyber Weapon
Mar 2011
When first discovered in 2010, the Stuxnet computer worm posed a baffling puzzle. Beyond its unusually high level of sophistication loomed a more troubling mystery: Its purpose. Ralph Langner and...
Provided by TED Conferences
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White Papers
Explore or Exploit? Effective Strategies for Disambiguating Large Databases
Oct 2009
Data ambiguity is inherent in applications such as data integration, location-based services, and sensor monitoring. In many situations, it is possible to "Clean", or remove, ambiguities from...
Provided by VLDB Endowment
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White Papers
Continuous Monitoring of Spatial Queries in Wireless Broadcast Environments
Oct 2009
Wireless data broadcast is a promising technique for information dissemination that leverages the computational capabilities of the mobile devices in order to enhance the scalability of the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Continuous Spatial Authentication
May 2009
Recent advances in wireless communications and positioning devices have generated a tremendous amount of interest in the continuous monitoring of spatial queries. However, such applications can...
Provided by Springer Science+Business Media
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White Papers
Retrieval of Spatial Join Pattern Instances From Sensor Networks
Jan 2008
The authors study the continuous evaluation of spatial join queries and extensions thereof, defined by interesting combinations of sensor readings (events) that co-occur in a spatial neighborhood....
Provided by Springer Science+Business Media
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White Papers
Ascending Runs in Dependent Uniformly Distributed Random Variables: Application to Wireless Networks
Feb 2008
The authors analyze in this paper the longest increasing contiguous sequence or maximal ascending run of random variables with common uniform distribution but not independent. Their dependence is...
Provided by INRIA
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White Papers
A Unified Approach to Combinatorial Key Predistribution Schemes for Sensor Networks
Feb 2011
There have been numerous recent proposals for key predistribution schemes for wireless sensor networks based on various types of combinatorial structures such as designs and codes. Many of these...
Provided by University of London
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White Papers
The Hummingbird-2 Lightweight Authenticated Encryption Algorithm
Mar 2011
Hummingbird-2 is an encryption algorithm with a 128-bit secret key and a 64-bit initialization vector. Hummingbird-2 optionally produces an authentication tag for each message processed. Like its...
Provided by Revere Security
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White Papers
Using DSR for Routing Multimedia Traffic in Manets
Jan 2010
In Mobile Ad hoc NETworks (MANETs), links are created and destroyed in an unpredictable way, which makes quite challenging the determination of routes between each pair of nodes. In this paper,...
Provided by University Laval
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White Papers
Effective Location Acquisition Control Algorithms for the Location-Based Alert Services in Mobile Environment
Jan 2010
The location-based alert services can be regarded as the one of the most practical location-based services. For the services, an alert service system for the services alerts mobile device users...
Provided by Yonsei University
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White Papers
Impact of Mobility Models on Multi-Path Routing in Mobile Ad Hoc Networks
Jan 2010
The high-level contribution of this paper is a detailed simulation based analysis about the impact of mobility models on the performance of node-disjoint and link-disjoint multi-path routing...
Provided by Northern Kentucky University
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White Papers
Heterogeneous Attachment Strategies Optimize the Topology of Dynamic Wireless Networks
May 2009
In optimizing the topology of wireless networks built of a dynamic set of spatially embedded agents, there are many trade-offs to be dealt with. The network should preferably be as small (in the...
Provided by Sungkyunkwan University
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White Papers
Achievable Rate and Optimal Physical Layer Rate Allocation in Interference-Free Wireless Networks
May 2009
The authors analyze the achievable rate in interference-free wireless networks with physical layer fading channels and orthogonal multiple access. As a starting point, the point-to-point channel...
Provided by California Institute of Technology
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White Papers
K-User Interference Channels: Achievable Secrecy Rate and Degrees of Freedom
May 2009
In a wireless environment, interference is always present. Traditionally, interference is viewed as a harmful physical phenomenon that should be avoided. Yet, from the secrecy perspective, if...
Provided by Pennsylvania State University
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White Papers
Dynamic Neural Networks in the Detection of Distributed Attacks in Mobile Ad-Hoc Networks
Jan 2010
This paper describes the latest results of a research program that is designed to enhance the security of wireless Mobile Ad Hoc NETworks (MANET) by developing a distributed intrusion detection...
Provided by Nova Southeastern University
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White Papers
Two Snap-Stabilizing Point-to-Point Communication Protocols in Message-Switched Networks
May 2009
A snap-stabilizing protocol, starting from any configuration, always behaves according to its specification. In this paper, the authors present a snap-stabilizing protocol to solve the message...
Provided by Universite de Picardie Jules Verne
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White Papers
Multilevel Coding Over Two-Hop Single-User Networks
May 2009
In this paper, a two-hop network in which information is transmitted from a source via a relay to a destination is considered. It is assumed that the channels are static fading with additive white...
Provided by University of Waterloo
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White Papers
On the Secrecy Rate of Interference Networks Using Structured Codes
May 2009
This paper shows that structured transmission schemes are a good choice for secret communication over interference networks with an eavesdropper. Structured transmission is shown to exploit...
Provided by University of Texas
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White Papers
A Formal Verification Framework for Security Policy Management in Mobile IP Based WLAN
Oct 2010
The continuous advancement of wireless technologies especially for enterprise Wireless Local Area Networks (LANs), demands well defined security mechanisms with appropriate architectural support...
Provided by Indian Institute of Technology Kharagpur
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White Papers
Emergency Response Communications and Associated Security Challenges
Oct 2010
The natural or man-made disaster demands an efficient communication and coordination among first responders to save life and other community resources. Normally, the traditional communication...
Provided by Asian Institute of Technology
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White Papers
A Test-Bed Implementation for Securing OLSR in Mobile Ad-Hoc Networks
Oct 2010
Contemporary personal computing devices are increasingly required to be portable and mobile enabling user's wireless access, to wired network infrastructures and services. This approach to mobile...
Provided by Kingston University
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White Papers
Effect of Hash Function on Performance of Low Power Wake Up Receiver for Wireless Sensor Network
Oct 2010
Next generation network will consist of different types of wireless networks like WSN, Wi-Fi, WiMAX, UMTS, LTE and etc. Wireless Sensor Network (WSN) finds unique and special application as...
Provided by NIT Kurukshetra
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White Papers
Sum Capacity of Multi-Source Linear Finite-Field Relay Networks With Fading
May 2009
The authors study a fading linear finite-field relay network having multiple source-destination pairs. Because of the interference created by different unicast sessions, the problem of finding its...
Provided by The Board of Regents of the Washington State University
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White Papers
Design of Learning Based MIMO Cognitive Radio Systems
May 2009
This paper addresses the design issues of the multi-antenna-based Cognitive Radio (CR) system that is able to operate concurrently with the licensed Primary Radio (PR) system. The authors propose...
Provided by Jacobs University Bremen
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White Papers
On the Distribution of the Sum of Gamma-Gamma Variates and Applications in RF and Optical Wireless Communications
May 2009
The Gamma-Gamma (GG) distribution has recently attracted the interest within the research community due to its involvement in various communication systems. In the context of RF wireless...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Modelling and Analysis of the Distributed Coordination Function of IEEE 802.11 With Multirate Capability
Jun 2008
In this paper a discussion of the detailed operation of the interleavers used by the turbo codes defined on the telecommunications standards cdma2000 (3GPP2 C.S0024-B V2.0) and W-CDMA (3GPP TS...
Provided by Javeriana University
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White Papers
From e-Manufacturing to M-Manufacturing
Apr 2008
This paper studies the impact of wireless technologies on enterprises. A multitude of new paradigms and new software technologies have emerged from the web. E-business and e-manufacturing have...
Provided by Association of Colleges of Computing and Information
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White Papers
Security in Wireless Sensor Networks: Key Management Module in SOOAWSN
Oct 2010
Due to high restrictions in wireless sensor networks, where the resources are limited, clustering protocols for routing organization have been proposed in much research for increasing system...
Provided by University of Bridgeport
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White Papers
Evaluating Galois Counter Mode in Link Layer Security Architecture for Wireless Sensor Networks
Oct 2010
Due to the severe resource constraints in the Wireless Sensor Networks (WSNs), the security protocols therein, should be designed to optimize the performance maximally. On the other hand a block...
Provided by C.K. Pithawalla College Of Engineering & Technology
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White Papers
Securing AODV for MANETs using Message Digest with Secret Key
Oct 2009
Due to lack of the infrastructure, open peer-to-peer architecture, shared wireless medium, limited resource constraints and highly dynamic topology, MANETs (Mobile Adhoc NETworks) are frequently...
Provided by Atmiya Institute Of Technology & Science
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White Papers
Optimization of Energy Efficient Transmission in Underwater Sensor Networks
May 2009
Underwater communication is a challenging topic due to its singular channel characteristics. Most protocols used in terrestrial wireless communication cannot be directly applied in the underwater...
Provided by Cornell University
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White Papers
A Security Framework for SOA Applications in Mobile Environment
Oct 2009
A Rapid evolution of mobile technologies has led to the development of more sophisticated mobile devices with better storage, processing and transmission power. These factors enable support to...
Provided by AIRCC
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White Papers
Performance Evaluation of a New Route Optimization Technique for Mobile IP
Oct 2009
Mobile ip (mip) is an internet protocol that allows mobile nodes to have continuous network connectivity to the internet without changing their ip addresses while moving to other networks. The...
Provided by Minia University
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White Papers
Data Security in Mobile Devices by Geo Locking
Oct 2009
In this paper the authors present a way of hiding the data in mobile devices from being compromised. They use two level data hiding technique, where in its first level data is encrypted and stored...
Provided by VIT UNIVERSITY
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White Papers
PSIM: A Tool for Analysis of Device Pairing Methods
Oct 2009
Wireless networks are a common place nowadays and almost all of the modern devices support wireless communication in some form. These networks differ from more traditional computing systems due to...
Provided by University of Sussex
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White Papers
Lacber: A New Location Aided Routing Protocol for GPS Scarce Manet
Aug 2009
Completely GPS-free positioning systems for wireless, mobile, ad-hoc networks typically stress on building a network-wide coordinate system. Such systems suffer from lack of mobility and high...
Provided by University of Calcutta
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White Papers
Modelling Concurrent Mobile Transactions Execution in Broadcasting Environments
Oct 2008
Broadcast is an efficient and scalable method for resolving the bandwidth limitation in a wireless environment. There is a trade-off between clients' access time and throughput for update mobile...
Provided by Zarqa Private University
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White Papers
A Dynamic Traffic Shaping Technique for a Scalable QoS in ATM Networks
Oct 2008
Traffic shaping function becomes imperative for the new broadband services that are being deployed in order to avoid information loss, to provide the end users multiple traffic options in terms of...
Provided by University of Botswana
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White Papers
Autonomous Design for the MISO Interference Channel With Mask Constraints at Reception
Jul 2011
This paper investigates the power control and beamforming design in the MISO-IC (Multiple Input Single Output-Interference Channel) when constraints are placed at the receivers' input power. In...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Cognitive Call Admission Control for VoIP Over IEEE 802.11 Using Bayesian Networks
Jan 2012
In this paper, the authors address the problem of provisioning Quality of Service (QoS) to Voice over IP applications in a Wireless LAN scenario based on the IEEE 802.11 standard. They propose the...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Dynamic Virtual Link Mesh Topology Aggregation in Multi-Domain Translucent WSON With Hierarchical-PCE
Dec 2011
The authors present a lab-trial of the designed and implemented path computation architecture for multi-domain translucent Wavelength Switched Optical Networks (WSON), using Hierarchical Path...
Provided by Optical Society of America
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White Papers
Efficient Data Transmission for an Energy Harvesting Node With Battery Capacity Constraint
Jul 2011
Energy harvesting is increasingly gaining importance as a means to charge battery powered devices such as sensor nodes. Efficient transmission strategies must be developed taking into account both...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Efficient Resource Allocation Algorithm for Uplink in Multicarrier-Based Cognitive Radio Networks With Fairness Consideration
Oct 2011
An efficient fairness-aware uplink resource allocation algorithm in orthogonal frequency-division multiplexing-based cognitive radio systems is presented. The proposed resource allocation...
Provided by Institution of Engineering and Technology
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White Papers
Energy-Efficient Data Collection in WSN With Network Coding
Feb 2012
The authors consider the application of a network coding scheme in WSN (Wireless Sensor Networks) for robustness. The use of network coding in WSN is evaluated in terms of reliability improvement,...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Hybrid Space-Ground Processing for High-Capacity Multi-Beam Satellite Systems
Jul 2011
Signal processing in satellite applications is usually performed either on-ground or on-board, i.e., at the gateway station or in the payload. Within the framework of the European Space Agency...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
RF MEMS Suspended Band-Stop Resonator and Filter for Frequency and Bandwidth Continuous Fine Tuning
Dec 2011
Tunable band-stop resonators are the building block to produce tunable band-stop filters that can play an important role in wireless communication receivers. The authors can be used in adaptable...
Provided by IOP Publishing
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White Papers
Adaptive Generalized Space Shift Keying (GSSK) Modulation for MISO Channels: A New Method for High Diversity and Coding Gains
Feb 2012
Generalized Space Shift Keying (GSSK) modulation is a recently proposed low-complexity concept for Multiple-Input-Multiple-Output (MIMO) wireless systems. GSSK modulation is a generalized version...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Femtocells: Past, Present, and Future
Nov 2011
The topology and architecture of cellular networks are undergoing a major paradigm shift from voice-centric, circuit switched and centrally optimized for coverage towards datacentric, packet...
Provided by New York University
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White Papers
Joint Linear Precoding and Beamforming for the Forward Link of Multi-Beam Broadband Satellite Systems
Jul 2011
Next generation high throughput satellite systems are expected to rely on the deployment of a high number of beams in the user link, and therefore operate in an interference limited regime. This...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Joint Subcarrier Pairing and Power Allocation for DF-Relayed OFDM Cognitive Systems
Mar 2011
In this paper, the problem of resource allocation in OFDM based decode-and-forward Cognitive Radio (CR) system is considered. The objective is to maximize the CR system throughput by optimizing...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
On the Estimation of Randomly Sampled 2D Spatial Fields Under Bandwidth Constraints
Aug 2011
In this paper, the authors address the problem of the estimation of a spatial field defined over a two-dimensional space with wireless sensor networks. They assume that the field is (spatially)...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Power Allocation Schemes for Spatial Field Estimation With Compressed Observations in M2M Capillary Networks
Sep 2011
In this paper, the authors focus on the use capillary M2M (Machine-To-Machine) networks for the estimation of spatial random fields. The observations (samples) collected by the sensors are...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Regulation and Research on Wireless Communications
Dec 2011
This paper describes which are the major changes would occur in regulation policies and role of the regulation bodies due to the advance of technology development, research and innovation in...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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White Papers
Resource Allocation for Secure OFDMA Networks With Imperfect CSIT
Nov 2011
In this paper, the authors formulate an optimization problem for resource allocation and scheduling in Orthogonal Frequency Division Multiple Access (OFDMA) networks. The authors' problem...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
A Context-Aware User Interface for Wireless Personal-Area Network Assistive Environments
Apr 2012
The daily life of people with severe motor system impairments is challenging and thus often subordinated to extensive external help; increasing their level of self-support is thus highly...
Provided by Aalborg University
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Whitepapers
An Infrastructure for Detecting and Punishing Malicious Hosts Using Mobile Agent Watermarking
Mar 2010
Mobile agents are software entities consisting of code, data, and state that can migrate autonomously from host to host executing their code. In such scenario there are some security issues that...
Provided by John Wiley & Sons
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Whitepapers
Studying Practical Any-to-Any Backpressure Routing in Wi-Fi Mesh Networks From a Lyapunov Optimization Perspective
Aug 2011
This paper studies practical backpressure routing strategies in WiFi-based Mesh Networks (WMN). It is practical in the sense that, unlike previous theoretical centralized algorithms, the authors...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Two-Hop Communication With Energy Harvesting
Sep 2011
Communication nodes with the ability to harvest energy from the environment have the potential to operate beyond the timeframe limited by the finite capacity of their batteries; and accordingly,...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Design and Application of Quasi-Elliptic Bandstop Filters
Sep 2011
In this paper, the design and implementation of a new type of band-stop filter having transmission zeros is presented. Detailed design aspects of 3 and 4 pole band-stop quasi-elliptic filters are...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
MSE-Optimal Power Allocation in Wireless Sensor Networks for Field Reconstruction Based on Shift-Invariant Spaces
Sep 2011
In the authors' previous work, they developed field reconstruction methods in wireless sensor networks based on shift-invariant spaces. In this paper, they use amplify-and-forward for the...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
On the Impact of Shadowing on the Performance of Cooperative Medium Access Control Protocols
Jul 2011
Accurate representation of the physical layer is instrumental for a sound design and optimization of Medium Access Control (MAC) protocols for cooperative wireless networks. However, the vast...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Real-Time Broadcasting Over Block-Fading Channels
Sep 2011
Broadcast transmission from a Base Station (BS) to a group of users is studied. It is assumed that the BS receives data at a constant rate and tries to broadcast these messages to the whole set of...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Satellite Radiolocalization From GPS to GNS Sand Beyond: Novel Technologies and Applications for Civil Mass Market
Nov 2011
It is known that satellite radio-localization was born in the military environment and was originally conceived for defense purposes. Nevertheless, the commercial explosion (dated to 20 years ago)...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Use of Turbo Codes With Low-Rate Convolutional Constituent Codes in Fingerprinting Scenarios
Sep 2011
The authors discuss the use of turbo codes in fingerprinting schemes. More precisely, they present a family of turbo codes that are secure against attacking coalitions of size 2. This family is...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
An Open Source Product-Oriented LTE Network Simulator Based on Ns-3
Nov 2011
In this paper, the authors present a new simulation module for ns-3 aimed at the simulation of LTE networks. This module has been designed with a product-oriented perspective in order to allow LTE...
Provided by Association for Computing Machinery
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Whitepapers
Distributed Point Coordination Function for IEEE 802.11 Wireless Ad Hoc Networks
Jul 2011
The Distributed Point Coordination Function (DPCF) is presented in this paper as a novel Medium Access Control Protocol (MAC) for wireless ad hoc networks. DPCF extends the operation of the Point...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Modeling Network Traffic in Mobile Networks Implementing Offloading
Nov 2011
The increasing demand of mobile data traffic is starting to stress the networks of Mobile Network Operators (MNOs). Techniques for offloading traffic (partially or totally) from the network of the...
Provided by Association for Computing Machinery
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Whitepapers
Robust Detection of Primary User Emulation Attacks in IEEE 802.22 Networks
Oct 2011
Cognitive Radio (CR) technology constitutes a new paradigm where wireless devices can access the spectrum left unused by licensed or primary users in an opportunistic way. This feature opens the...
Provided by Association for Computing Machinery
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Whitepapers
Saturation Throughput Performance Analysis of a Medium Transparent MAC Protocol for 60 GHz Radio-Over-Fiber Networks
Dec 2011
The authors describe an analytical model for calculating the saturation throughput performance of a medium transparent Medium Access Control (MAC) protocol in 60 GHz Radio-over-Fiber (RoF)...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Secure Resource Allocation and Scheduling for OFDMA Decode-and-Forward Relay Networks
Oct 2011
In this paper, the authors formulate an optimization problem for secure resource allocation and scheduling in Orthogonal Frequency Division Multiple Access (OFDMA) half-duplex Decode-and-Forward...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Small Cells, Wireless Backhaul and Renewable Energy: A Solution for Disaster Aftermath Communications
Jan 2012
In this paper, the authors propose a network infrastructure to be deployed in the aftermath of a disaster with the aim of providing communication services to both emergency responders and...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
SWAP Project: Beyond the State of the Art on Harvested Energy-Powered Wireless Sensors Platform Design
Jul 2011
The main goal of the SWAP project is that of designing, implementing and ultimately testing a new breed of wireless sensor nodes with energy scavenging capabilities. The authors' design will...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
VITRO Architecture: Bringing Virtualization to WSN World
Aug 2011
This paper presents the architecture of the VITRO system concept developed under the VITRO project for the realization of Virtual Sensor Networks. The aim of the proposed architecture is to enable...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Antenna Array Based GNSS Signal Acquisition: Real-Time Implementation and Results
Oct 2011
The use of Global Navigation Satellite System (GNSS) technology in safety- and mission-critical services has raised the concern in recent times about possible GNSS Denial of Service (DoS)...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Characterizing WLAN Medium Utilization for Radio Environment Maps
Jun 2011
This paper explores the possibility to use the medium utilization as a metric to be included in Radio Environment Maps (REMs) of WLAN networks. The main objective is to build REMs that go beyond...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
DTV Band Micropower RF Energy-Harvesting Circuit Architecture and Performance Analysis
Nov 2011
This paper has firstly, presented a rectenna circuit which has measured RF-to-DC conversion efficiency equal to 18.2% given -20 dBm, 550 MHz single tone excitation. The rectified voltage given a...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
GNSS-SDR: An Open Source Tool for Researchers and Developers
Aug 2011
This paper introduces GNSS-SDR, an open source Global Navigation Satellite System software-defined receiver. The lack of reconfigurability of current commercial-of-the-shelf receivers and the...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
GREENET - An Early Stage Training Network in Enabling Technologies for Green Radio
Nov 2010
In this paper, the authors describe GREENET (an early stage training network in enabling technologies for green radio), which is a new project recently funded by the European Commission under the...
Provided by University of Trento
