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wireless lan
(1551 results)-
Whitepapers
WLAN-WiMAX Vertical Handover Hybrid Satisfaction Mechanism
Dec 2011
Handover is the key enabling option to guarantee seamless mobility within any wireless communication system, where the inter-systems handover option has recently acquired large importance, both in...
Provided by University of Jordan
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Whitepapers
Distributed Call Admission Control for VoIP Over 802.11 WLANs Based on Channel Load Estimation
Feb 2010
Call Admission Control (CAC) is recognized as one of the key strategies to achieve satisfactory QoS support for VoIP over IEEE 802.11 WLANs. However, most of the prior CAC solutions for VoIP over...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Framework for IMS Service Scenario Implementation
Oct 2010
This paper presents an experimental framework for implementation of an IMS/NGN reference service scenario by means of open source software. Multiple service enablers are deployed to build this...
Provided by Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering
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Whitepapers
User-Driven Call Admission Control for VoIP Over WLAN With a Neural Network Based Cognitive Engine
Oct 2010
In this paper, the authors deal with the problem of user-driven Call Admission Control for Voice over IP communications in a Wireless LAN environment. They argue that state-of-the-art solutions to...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Design Considerations for Measuring Utilization in Hybrid Paths Using Delay Measurements
Mar 2010
Recent research results have shown how measurements of bandwidth metrics using traditional tools and techniques have to be reconsidered in the presence of WLAN links. The main reason behind this...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Performance Analysis of the Distributed Queuing Collision Avoidance (DQCA) Protocol With Link Adaptation
Dec 2009
DQCA is a near-optimum Medium Access Control (MAC) protocol designed for Wireless Local Access Networks (WLANs). The protocol operates as a random access scheme under low traffic load and switches...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Methodology for Traffic Load Estimation in WLANs Based on Real Traces
Jun 2008
This paper presents a methodology to estimate traffic load parameters in a WLAN network consisting of a large number of Access Points (APs). The methodology takes into account the high variability...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Near-Optimum Cross-Layered Distributed Queuing Protocol for Wireless LAN
Nov 2008
Distributed Queuing Collision Avoidance (DQCA) is a distributed MAC protocol for WLAN systems that offers near optimum performance. The protocol implements a reservation scheme that ensures...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Characterization and Comparison of Skype Behavior in Wired and Wireless Network Scenarios
Nov 2007
This paper analyzes the call quality perceived by Skype users in both fixed and mobile environments. Specifically, LAN, WLAN, ADSL and UMTS network connections are evaluated by means of both PCs...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Cross-Layer Enhancement for WLAN Systems With Heterogeneous Traffic Based on DQCA
Nov 2007
Voice transmission over WLAN and Cross-Layer optimization are emerging research topics. This paper proposes two novel Cross-Layer mechanisms to be included in a WLAN system where the offered...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Opportunistic Scheduling Using an Enhanced Channel State Information Update Scheme for WLAN Systems With DQCA
Nov 2007
Cross-layer opportunistic scheduling on DQCA-based WLAN systems yields high performance results. This paper emphasizes the need for accurate Channel State Information (CSI) and presents an...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Deployment and Evaluation of IEEE 802.11 Based Wireless Mesh Networks in Campus Environments
Jul 2011
The traditional wireless networks cannot handle new requirements posed on the system. To become independent of backbone networks leading to cheap deployments, the traditional single-hop approach...
Provided by PEC University of Technology
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Whitepapers
Enhancement of QoS Performance in Wireless LAN: Analysis
Mar 2012
Wireless Local Area Network (WLAN) has become more popular in recent years. With increase in demand users are expecting Quality of Service (QoS) for multimedia services in WLAN. To improve...
Provided by International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
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Whitepapers
A Study on Minimization of 2G/3G Handover Failure
Apr 2012
One of the most interesting 3G networks feature is their integration with the 2G networks. It provides seamless End to-End services. Current widely deployed 2G and 3G networks provide enabling...
Provided by International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
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Whitepapers
Quantum Cryptography With Key Distribution in Wireless Networks on Privacy Amplification
Dec 2011
Wireless networks have become one of the most extensively used communication systems in the world. Providing secure communication for wireless networks has become one of the main concerns....
Provided by International Journal of Computer Networks and Wireless Communications (IJCNWC)
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Whitepapers
Performance Evaluation of Selection Schemes for Offloading Traffic to IEEE 802.11 Hotspots
Mar 2012
Offloading data traffic to IEEE 802.11 hotspots is one of the key techniques with which mobile operators aim at dealing with the increasing traffic demand of their users in cellular networks....
Provided by Technische Universität Berlin
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Whitepapers
On the Analysis of Wi-Fi Communication and WiMAX Network Entry Over Single Radios
Mar 2012
Future wireless mobile devices will have to support a variety of heterogeneous access technologies while having a limited number of transceiver chains. One of the most challenging tasks remains...
Provided by Technische Universität Berlin
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Whitepapers
Estimating Path Loss in Wireless Local Area Networks Using Ordinary Kriging
Nov 2010
This paper introduces ordinary kriging as a new tool to predict network coverage in wireless local area networks. The proposed approach aims to reduce the cost of active site surveys by estimating...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Relative Fairness and Optimized Throughput for Mobile Ad hoc Networks
Apr 2008
Although IEEE 802.11 provides several transmission rates, a suitable rate adaptation taking into account the relative fairness among all competitive stations, according to the underlying channel...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Energy-Efficiency of Cooperative Sensing Schemes in Ad Hoc WLAN Cognitive Radios
Apr 2012
In cognitive radio networks, the secondary users need to coordinate among themselves to reap the benefits of cooperative spectrum sensing. In this paper, the authors study and analyze the energy...
Provided by Wichita State University
-
Whitepapers
Implementation of Location Determination in a Wireless Local Area Network (WLAN) Environment
Feb 2008
Wireless Local Area Network (WLAN) is developed to complement the wired network. Various standards for WLAN exist, but the most common standards are IEEE 802.11b and 802.11g. Since, WLAN provides...
Provided by Universiti Kebangsaan Malaysia
-
Whitepapers
Multiband Meandered Monopole Antenna for Mobile Applications
Jun 2010
A multiband meandered monopole antenna is proposed for Digital Video Broadcasting Handheld (DVB-H), global positioning system, personal communications service, Wireless broadband (Wibro), and...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
2.4 GHz WLAN InGaP/GaAs Power Amplifier With Temperature Compensation Technique
Oct 2009
Recently, the Wireless Local Area Network (WLAN) market has grown rapidly due to the increasing demand for high data rates. It requires a highly linear Power Amplifier (PA) because of a high...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Design of 600Mbps 4x2 MIMO-OFDM Wireless LAN System and Its FPGA Implementation
Feb 2008
This paper presents a model-based Register Transfer Level (RTL) design of a 4x2 Multiple-Inputs Multiple-Outputs (MIMO)-Orthogonal Frequency Domain Multiplexing (OFDM) wireless communication...
Provided by Kyushu Institute of Technology
-
Whitepapers
Saturation Throughput Affected by the Ratio of Direct-to-Diffuse Signal Power in the Wireless LAN
Feb 2008
This paper analyzes saturation throughput variation quantitatively over Rayleigh or Ricean fading channels under the CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance)-based DCF...
Provided by California State University
-
Whitepapers
Clustering Algorithm for Hidden Node Problem In Infrastructure Mode IEEE 802.11 Wireless LANs
Feb 2008
To support the wireless internet services especially in the hot spot areas such as schools, hospitals, homes, and conference rooms, IEEE 802.11 wireless LAN systems have been widely implemented as...
Provided by Dong-A university
-
Whitepapers
A Study on MAC Protocol for 600 Mbps 4x2 MIMO-OFDM Wireless LAN System
Feb 2008
600 Mbps data rate with 20 m of propagation distance has been achieved in Multiple-Input Multiple-Output (MIMO) Wireless LAN (WLAN) system by using a Group Layered Space-Time (GLST) algorithm....
Provided by Kyushu Institute of Technology
-
Whitepapers
Mobile Agent for Distributed Intrusion Detection System in Distributed System
Feb 2012
Due to the rapid growth of the network application, new kinds of network attacks are emerging endlessly. So it is critical to protect the networks from attackers and the Intrusion detection...
Provided by International Journal of Computer Technology and Electronics Engineering
-
Whitepapers
Increase Bandwidth for Circular Microstrip Patch Antenna
Feb 2012
In this paper a design and performance of a circularly microstrip patch antenna, for the application in Wireless Local Area Network (WLAN), are reported here. The antenna is a proximity coupled...
Provided by International Journal of Computer Technology and Electronics Engineering
-
Whitepapers
Broadbanding of a Planar Antenna With Three Frequency Bands and Its Application
Dec 2007
This paper describes a line element planar antenna with three frequency bands. To obtain broadband characteristics, a modified planar antenna that has semielliptical elements based on the...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
DS-PAM UWB System Using Non-Linear Chirp Waveform
Jun 2007
The authors propose a Direct-Sequence Pulse-Amplitude Modulation (DS-PAM) Ultra-WideBand (UWB) system which employs a non-linear chirp waveform instead of the conventional Gaussian monocycle in...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Double-Loop Receiver-Initiated MAC for Cooperative Data Dissemination Via Roadside WLANs
Jun 2012
In this paper, the authors investigate data dissemination in Delay Tolerant Networks (DTNs) via RoadSide Wireless Local Area Networks (RS-WLANs). The data dissemination service is destined to a...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimal Scheduling for Roadside WLANs With Pre-Downloaded Messages
Jan 2011
In this paper, data dissemination services are discussed in the context of Vehicular Ad hoc NETworks (VANETs). In order to improve the efficiency of data dissemination, messages are network coded...
Provided by University of Waterloo
-
Whitepapers
A Double-Loop Receiver-Initiated Medium Access Control Scheme for Data Dissemination Services With Packet Pre-Downloading
Jan 2011
In this paper, the authors consider a DTN/WLAN integrated network where high-mobility nomadic nodes form a Delay Tolerant Network (DTN) and low-mobility local nodes reside in the coverage area of...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
DTCoop: Delay Tolerant Cooperative Communications in DTN/WLAN Integrated Networks
Sep 2010
In this paper, the authors consider a DTN/WLAN integrated network where nomadic nodes with high mobility comprise a Delay Tolerant Network (DTN) while local nodes with low mobility reside in the...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
DFMAC: DTN-Friendly Medium Access Control for Wireless Local Area Networks
Jun 2009
In this paper, the authors consider a wireless communication network for both low-speed mobile nodes in densely populated hotspots and high-speed mobile nodes roaming in a large area. Wireless...
Provided by University of Waterloo
-
Whitepapers
Control Theoretic Optimization of 802.11 WLANs: Implementation and Experimental Evaluation
Mar 2012
In 802.11 WLANs, adapting the contention parameters to network conditions results in substantial performance improvements. Even though the ability to change these parameters has been available in...
Provided by University Carlos III of Madrid
-
Whitepapers
Performance and Fairness Analysis of a QoS Supportive MAC Protocol for Wireless LANs
Apr 2011
IEEE 802.11e Enhanced Distributed Channel Access (EDCA) is developed to provide Wireless Local Area Networks (WLANs) with Quality of Service (QoS) support. Several solutions have been proposed in...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analysis of Jamming Effects on IEEE 802.11 Wireless Networks
Apr 2011
IEEE 802.11 wireless transmissions suffer from a big security flaw as they are vulnerable to Denial of Service (DoS) attacks which can degrade severely their performance, especially their achieved...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Stochastic Modeling of Microwave Oven Interference in WLANs
Apr 2011
In IEEE 802.11b/g/n Wireless Local Area Network (WLAN) experiences significant Radio Frequency Interference (RFI) from microwave ovens, cordless phones, Bluetooth devices, and other WLANs...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Interoperability Considerations for Today's Wi-Fi Networks
Dec 2007
As Wireless LANs (WLANs) have expanded rapidly over the recent years, the adoption rate for the IEEE 802.11 technology has seen a tremendous growth. Such market demand for unwiring enterprise...
Provided by Aruba Networks
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Whitepapers
The Indestructible Network: Wireless LANs for Industrial and Outdoor Applications
Jan 2008
Off late the new requirements on outdoor and industrial communications have increasingly stressed communications infrastructure designs. Meanwhile, a number of developments in Wi-Fi for enterprise...
Provided by Aruba Networks
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Whitepapers
I Can See Clearly Now: Bringing Wireless Broadband Video Into Focus
Oct 2009
Sending broadband video over Wireless LANs (WLANs) used to be a trying experience, with jitter and dropouts marring picture quality, and bandwidth limits restricting the number of available...
Provided by Aruba Networks
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Whitepapers
The All-Wireless Workplace Is Now Open for Business: Using 802.11n as Your Primary Network LAN Deployments
Dec 2007
Wi-Fi technology has been steadily improving for some years, to the extent that many workers now rely on wireless as their primary data connection to the corporate network. Wi-Fi infrastructure...
Provided by Aruba Networks
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Whitepapers
The T-Mobile HotSpot@Home UMA Service on a University or Enterprise WLAN
Feb 2009
Off late the features of dual-mode devices (cellular voice and data clients with additional Wi-Fi radios) have grown increasingly sophisticated. The burgeoning capabilities of these devices have...
Provided by Aruba Networks
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White Papers
Wireless LAN Operations: From Reactive to Proactive
Oct 2009
Enterprises everywhere are turning to Wireless Networks (WLANs) as their primary network to provide users mobility, increase productivity and lower infrastructure cost. The recent ratification of...
Provided by Meru Networks
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White Papers
Top 10 Things Network Managers Need to Know About Wireless LAN Virtualization
Nov 2008
As far as applications and users are concerned, the Virtual Port has all the same characteristics as an Ethernet port: consistent, reliable connectivity. The big difference is that whereas...
Provided by Meru Networks
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White Papers
Top 5 Things CIOs Need to Know About Wireless LAN Virtualization
Nov 2008
Virtualization has already made servers, storage and other IT assets more flexible, letting IT adjust the resources available to each application on demand. WLAN Virtualization does the same for...
Provided by Meru Networks
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White Papers
Wireless LAN Virtualization: Twice the Network at Half the Cost
Nov 2008
With the introduction of 802.11n, WLAN radio data rates of 300Mbps and peak throughput not too far behind have propelled the speed of wireless networks past wired Ethernet. With the increase in...
Provided by Meru Networks
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White Papers
Secure Wireless Made Easy - Selecting a Next-Generation Solution for Pervasive WLAN Implementations
Apr 2009
This paper examines the characteristics of a next-generation solution that helps alleviate the prevailing issues and challenges associated with today's WLAN implementations. The emergence of...
Provided by SonicWALL
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White Papers
Dell-Customized Mobility Solutions
Oct 2009
The marketplace is overflowing with a multitude of mobility options for businesses of all types and sizes. From notebooks, netbooks, and handheld computers to WiFi, smartphones, and mobile...
Provided by Dell
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White Papers
Meraki White Paper: Wireless LAN Security
Mar 2009
While security is important for all networks, wireless LANs deserve special consideration since they are subject to an increased level of risk. First, since wireless extends beyond the walls of an...
Provided by Meraki
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Webcasts
Case Study Webinar? How to Secure Your Cisco WLAN Today
Apr 2009
This webcast will give attendees a real life case study of how one organization avoided pitfalls while expanding and remediating it's Cisco WLAN and achieved the best performance and robust and...
Provided by AirTight Networks
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Webcasts
Effective Strategies for Evaluating Your WLAN Security
Jan 2009
This webcast offers a practical guide for selecting a WLAN security solution. The presenter explains the prevalent methods for wireless access point detection and classification.
Provided by AirTight Networks
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Case Studies
A WLAN Success Story: Wireless Office
Jan 2009
Nortel IT needed to provide voice and data communications for Nortel sales and engineering staff in Albany, New York. The challenge was that Nortel sales and engineering office in Albany required...
Provided by Nortel Networks
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Case Studies
A Stronger WLAN Business Case
Jan 2009
More than five years ago, Nortel IT began deploying WLAN as a convenience service for nomadic employees. The challenge was to improve business case for WLAN and to demonstrate real cost savings....
Provided by Nortel Networks
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Presentations
Interactive Guide: Enterprise Mobility
Sep 2009
Getting Started With Enterprise Mobility: A Guide to Sybase's Enterprise Mobility Platform. With the broadest portfolio of industry-leading products, an innovative mobility platform that provides...
Provided by Sybase
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Webcasts
Webcast & Video: Special Report on MEAP featuring research from Gartner
Sep 2009
Complimentary Webcast: Taking a Strategic Approach to Enterprise Mobility. Whether you're just getting started with mobility or have already rolled out multiple applications, taking a strategic...
Provided by Sybase
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Webcasts
Beyond Casual Mobility: Building Wireless LANs That Scale
Jun 2009
The attendee of this webcast will learn strategies for deploying high scale, wireless LANs. Discover tips for architecting wireless LANs that integrate with the wired LAN and scale to meet a...
Provided by Cisco Systems
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White Papers
Mobility Enables True Unified Communications
Aug 2009
Deploying UC in conjunction with a mobility solution can increase employee productivity and improve customer service enabling workers to more easily collaborate from disparate locations. Download...
Provided by NEC
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White Papers
Preparing Your WLAN Infrastructure for Voice
Apr 2009
Adding mobility to enterprise voice communications can be the key to unlocking business productivity and responsiveness. Whether addressing production problems, planning promotions or responding...
Provided by Motorola
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White Papers
Mobile Unit Power Plus: Maximizing the Battery Life of Your Mobile Units Through the WLAN Switch
Mar 2008
Power Plus - This is a unique feature of Motorola wireless mobile devices that allows the mobile devices to automatically adjust its output power based upon the power settings of the associated...
Provided by Motorola
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White Papers
How to Generate Immediate Savings with Outsourced Mobility Spend Management
Aug 2009
Looking for more ways to cut IT costs? Today companies are rethinking the way they do business. As workers react to the pressure to be more productive, usage of smart devices and air cards is...
Provided by ProfitLine
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Case Studies
Managed Mobility Case Study: USPS
Aug 2009
Companies are struggling to maintain control and visibility of their mobile ecosystems. Managing thousands of wireless devices is even more challenging if you have a decentralized environment and...
Provided by ProfitLine
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White Papers
New Roles for Unified Communications Over WLAN: The Evolution of Paging in Healthcare
Oct 2008
One of the most mission-critical applications for wireless communications is the delivery of healthcare. With the quality of patient care and safety paramount in this environment, operational...
Provided by Cisco Systems
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White Papers
Working Together - Customer Relationship Management and Wireless Networks
Jan 2009
Today's wireless local area networks (WLANs), wide area networks (WANs) and Wi -Fi hotspots enable anywhere, anytime network access; always available flow of information; and up -to-the-minute CRM...
Provided by Motorola
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White Papers
Wireless LAN Data Capture - Pulling All the Pieces Together
Dec 2008
Integrated wide -area wireless voice and data solutions using automatic data capture are now possible on a single hardware platform. This combination of point -of-activity computing, automatic...
Provided by Motorola
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White Papers
The Case for an Untethered Enterprise
Jun 2008
While once considered a luxury, Wi-Fi connectivity is now an integral part of the modern enterprise. To that end, most corporate IT administrators are expected to deploy wireless LANs. Until...
Provided by Motorola
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White Papers
Redefining Mobile Applications: Mobility Services and the Unified Network
May 2008
It was perhaps only a matter of time, and regardless a very natural evolution, for the fundamental concepts embodied in mobile middleware to move into the network in the form of an appliance. But...
Provided by Farpoint Group
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White Papers
5 Strategies to Overcome Mobile Policy Enforcement Roadblocks
Jan 2010
The debate about whose device it is strikes fear in the hearts and minds of IT and Wireless Managers everywhere. When it comes to taking control of smart devices in the enterprise, culture and...
Provided by ProfitLine
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White Papers
Focus Research Comparison Guide: Enterprise PBX
Jul 2009
Leave a lasting postive impression with your customers! For many businesses the contact center is where your customers will connect and interact most frequently with your company. VoIP systems...
Provided by Focus.com
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White Papers
Designing Polycom SpectraLink VoWLAN Solutions to Comply With Payment Card Industry (PCI) Data Security Standard (DSS)
Jan 2009
The focus of this white paper is to provide guidance on achieving PCI DSS compliance for wireless LANs (WLANs) using Polycom SpectraLink handsets to run VoWLAN. VoWLAN is defined as "The use of a...
Provided by Polycom
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White Papers
WLAN Security Today: Wireless More Secure Than Wired
Jul 2008
Wireless LAN security has come a long way since the early days and the negative publicity around the shortcomings of WEP. Recent advances in WLAN technology and the ratification of key wireless...
Provided by Siemens
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Whitepapers
Is Your WLAN Helping You Comply With Security Guidelines of the PCI Standard?: HP ProCurve Can Help You Shore Up Your Wireless LAN Vulnerabilities
Nov 2008
The Payment Card Industry (PCI) Data Security Standard was created in 2004 by major credit card companies - American Express, Discover Financial, JCB, MasterCard Worldwide, and Visa International...
Provided by Hewlett-Packard (HP)
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White Papers
Payment Card Industry Data Security Standard (PCI DSS) Primer Version 1.1 Applying PCI to Wireless LANS and Compliance Requirements
Sep 2007
The PCI DSS standard consists of "a set of comprehensive requirements for enhancing payment account data security" that includes twelve major security requirements to secure payment account...
Provided by Alcatel-Lucent
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Resource Center
Authentication Decision Tree Tool
Jun 2009
The RSA Authentication Decision Tree Tool is an interactive tool to help organizations understand, evaluate and select the most appropriate authentication solution to meet the needs of their users...
Provided by RSA Security
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White Papers
TANDBERG and Wireless LAN- Configuration example
Jun 2009
Configuration example with Compaq AP and Compaq WLAN card.
Provided by TANDBERG, now part of Cisco
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Case Studies
Hewlett-Packard (HP) Case Study: Asan Medical Center
Nov 2008
In anticipation of opening a new 15-story building on its main campus that would house an additional 700 beds, Asan Medical Center wanted to upgrade its wireless LAN infrastructure in order to...
Provided by Hewlett-Packard (HP)
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Case Studies
University of the South - Providing Wireless to Increase Student and Faculty Satisfaction
Oct 2008
The University of the South, known familiarly as "Sewanee," is located on 10,000 acres atop the Cumberland Plateau between Nashville and Chattanooga, Tenn. They needed to find a wireless solution...
Provided by Hewlett-Packard (HP)
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Case Studies
UK Secondary School Expands Online Learning Campus-Wide With Secure 3Com Wireless Solutions
Jan 2009
While most school departments wrestle with how to affordably "Wire" classrooms for computer education, West Park School in Derby, UK, went in a different direction for a solution in preparation...
Provided by 3Com
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Whitepapers
Relative Fairness and Optimized Throughput for Mobile Ad hoc Networks
Apr 2008
Although IEEE 802.11 provides several transmission rates, a suitable rate adaptation taking into account the relative fairness among all competitive stations, according to the underlying channel...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Energy-Efficiency of Cooperative Sensing Schemes in Ad Hoc WLAN Cognitive Radios
Apr 2012
In cognitive radio networks, the secondary users need to coordinate among themselves to reap the benefits of cooperative spectrum sensing. In this paper, the authors study and analyze the energy...
Provided by Wichita State University
-
Whitepapers
Implementation of Location Determination in a Wireless Local Area Network (WLAN) Environment
Feb 2008
Wireless Local Area Network (WLAN) is developed to complement the wired network. Various standards for WLAN exist, but the most common standards are IEEE 802.11b and 802.11g. Since, WLAN provides...
Provided by Universiti Kebangsaan Malaysia
-
Whitepapers
Multiband Meandered Monopole Antenna for Mobile Applications
Jun 2010
A multiband meandered monopole antenna is proposed for Digital Video Broadcasting Handheld (DVB-H), global positioning system, personal communications service, Wireless broadband (Wibro), and...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
2.4 GHz WLAN InGaP/GaAs Power Amplifier With Temperature Compensation Technique
Oct 2009
Recently, the Wireless Local Area Network (WLAN) market has grown rapidly due to the increasing demand for high data rates. It requires a highly linear Power Amplifier (PA) because of a high...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Design of 600Mbps 4x2 MIMO-OFDM Wireless LAN System and Its FPGA Implementation
Feb 2008
This paper presents a model-based Register Transfer Level (RTL) design of a 4x2 Multiple-Inputs Multiple-Outputs (MIMO)-Orthogonal Frequency Domain Multiplexing (OFDM) wireless communication...
Provided by Kyushu Institute of Technology
-
Whitepapers
Saturation Throughput Affected by the Ratio of Direct-to-Diffuse Signal Power in the Wireless LAN
Feb 2008
This paper analyzes saturation throughput variation quantitatively over Rayleigh or Ricean fading channels under the CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance)-based DCF...
Provided by California State University
-
Whitepapers
Clustering Algorithm for Hidden Node Problem In Infrastructure Mode IEEE 802.11 Wireless LANs
Feb 2008
To support the wireless internet services especially in the hot spot areas such as schools, hospitals, homes, and conference rooms, IEEE 802.11 wireless LAN systems have been widely implemented as...
Provided by Dong-A university
-
Whitepapers
A Study on MAC Protocol for 600 Mbps 4x2 MIMO-OFDM Wireless LAN System
Feb 2008
600 Mbps data rate with 20 m of propagation distance has been achieved in Multiple-Input Multiple-Output (MIMO) Wireless LAN (WLAN) system by using a Group Layered Space-Time (GLST) algorithm....
Provided by Kyushu Institute of Technology
-
Whitepapers
Mobile Agent for Distributed Intrusion Detection System in Distributed System
Feb 2012
Due to the rapid growth of the network application, new kinds of network attacks are emerging endlessly. So it is critical to protect the networks from attackers and the Intrusion detection...
Provided by International Journal of Computer Technology and Electronics Engineering
-
Whitepapers
Increase Bandwidth for Circular Microstrip Patch Antenna
Feb 2012
In this paper a design and performance of a circularly microstrip patch antenna, for the application in Wireless Local Area Network (WLAN), are reported here. The antenna is a proximity coupled...
Provided by International Journal of Computer Technology and Electronics Engineering
-
Whitepapers
Broadbanding of a Planar Antenna With Three Frequency Bands and Its Application
Dec 2007
This paper describes a line element planar antenna with three frequency bands. To obtain broadband characteristics, a modified planar antenna that has semielliptical elements based on the...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
DS-PAM UWB System Using Non-Linear Chirp Waveform
Jun 2007
The authors propose a Direct-Sequence Pulse-Amplitude Modulation (DS-PAM) Ultra-WideBand (UWB) system which employs a non-linear chirp waveform instead of the conventional Gaussian monocycle in...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Double-Loop Receiver-Initiated MAC for Cooperative Data Dissemination Via Roadside WLANs
Jun 2012
In this paper, the authors investigate data dissemination in Delay Tolerant Networks (DTNs) via RoadSide Wireless Local Area Networks (RS-WLANs). The data dissemination service is destined to a...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimal Scheduling for Roadside WLANs With Pre-Downloaded Messages
Jan 2011
In this paper, data dissemination services are discussed in the context of Vehicular Ad hoc NETworks (VANETs). In order to improve the efficiency of data dissemination, messages are network coded...
Provided by University of Waterloo
-
Whitepapers
A Double-Loop Receiver-Initiated Medium Access Control Scheme for Data Dissemination Services With Packet Pre-Downloading
Jan 2011
In this paper, the authors consider a DTN/WLAN integrated network where high-mobility nomadic nodes form a Delay Tolerant Network (DTN) and low-mobility local nodes reside in the coverage area of...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
DTCoop: Delay Tolerant Cooperative Communications in DTN/WLAN Integrated Networks
Sep 2010
In this paper, the authors consider a DTN/WLAN integrated network where nomadic nodes with high mobility comprise a Delay Tolerant Network (DTN) while local nodes with low mobility reside in the...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
DFMAC: DTN-Friendly Medium Access Control for Wireless Local Area Networks
Jun 2009
In this paper, the authors consider a wireless communication network for both low-speed mobile nodes in densely populated hotspots and high-speed mobile nodes roaming in a large area. Wireless...
Provided by University of Waterloo
-
Whitepapers
Control Theoretic Optimization of 802.11 WLANs: Implementation and Experimental Evaluation
Mar 2012
In 802.11 WLANs, adapting the contention parameters to network conditions results in substantial performance improvements. Even though the ability to change these parameters has been available in...
Provided by University Carlos III of Madrid
-
Whitepapers
Performance and Fairness Analysis of a QoS Supportive MAC Protocol for Wireless LANs
Apr 2011
IEEE 802.11e Enhanced Distributed Channel Access (EDCA) is developed to provide Wireless Local Area Networks (WLANs) with Quality of Service (QoS) support. Several solutions have been proposed in...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analysis of Jamming Effects on IEEE 802.11 Wireless Networks
Apr 2011
IEEE 802.11 wireless transmissions suffer from a big security flaw as they are vulnerable to Denial of Service (DoS) attacks which can degrade severely their performance, especially their achieved...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Stochastic Modeling of Microwave Oven Interference in WLANs
Apr 2011
In IEEE 802.11b/g/n Wireless Local Area Network (WLAN) experiences significant Radio Frequency Interference (RFI) from microwave ovens, cordless phones, Bluetooth devices, and other WLANs...
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Whitepapers
Out-of-Band Signaling Scheme for High Speed Wireless LANs
Sep 2007
In recent years, the physical layer data rate provided by 802.11 Wireless LANs has dramatically increased thanks to significant advances in the modulation and coding techniques employed. However,...
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Whitepapers
Retry Limit Based ULP for Scalable Video Transmission Over IEEE 802.11e WLANs
Jun 2007
The authors investigate the packet loss behavior in the IEEE 802.11e Wireless Local Area Networks (WLANs) under various retry limit settings. Considering scalable video traffic delivery over the...
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Whitepapers
An On-Off Queue Control Mechanism for Scalable Video Streaming Over the IEEE 802.11e WLAN
Apr 2009
In this paper, the authors study the issue of scalable video streaming over IEEE 802.11e EDCA WLANs. Their basic idea is to control the number of "Active" nodes on the channel in order to reduce...
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Whitepapers
Wireless Indoor Positioning System With Enhanced Nearest Neighbors in Signal Space Algorithm
Feb 2007
With the rapid development and wide deployment of wireless Local Area Networks (WLANs), WLAN-based positioning system employing signal-strength-based technique has become an attractive solution...
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Whitepapers
Throughput Analysis of a Cognitive IEEE 802.11 WLAN Sharing the Downlink Band of a Cellular Network
Apr 2011
In this paper, the authors propose an analytical model to evaluate the maximum stable throughput of a cognitive IEEE 802.11-based WLAN sharing the downlink band of a cellular network. Their model...
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Whitepapers
Autonomous Dynamic Frequency Selection for WLANs Operating in the TV White Space
Apr 2011
This paper describes the challenges of frequency channel selection for WLANs operating in the TV White Space (TVWS) and proposes a Dynamic Frequency Selection (DFS) technique as the solution....
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Whitepapers
Comparison of Spectrum Sharing Techniques for IMT-A Systems in Local Area Networks
Mar 2009
The explosive growth of mobile communications on one hand and the overly crowded and expensive spectrum on the other hand have fueled hot debates on spectrum sharing techniques, anticipating...
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Cross-Layer-Optimized User Grouping Strategy in Downlink Multiuser MIMO Systems
Mar 2009
This paper proposes a cross-layer-optimized user selection and packet transmission technique for the downlink Multi-User (MU) Multiple-Input Multiple-Output (MIMO) system in IEEE 802.11 Wireless...
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Whitepapers
Dynamic Contention Window Control Scheme in IEEE 802.11e Wireless LANs
Mar 2009
In the IEEE 802.11 MAC protocol, Access Points (APs) are given the same authority as Wireless Terminals (WTs) in terms of acquiring the wireless link, even though they aggregate several downlink...
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Impact of Best Effort Frame Bursting in IEEE 802.11 Networks
Mar 2009
Wireless LAN strongly prioritizes high priority traffic over low priority best effort traffic. This causes reduced access to the medium for low priority traffic and under some conditions even...
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A Bandwidth Efficient Pairing Strategy for the MIMO-OFDM Based WLANs
Mar 2009
The advanced MIMO (Multiple-Input Multiple-Output) system can provide higher capacity gain or higher diversity gain in modern wireless networks. The capacity gain is achieved by interference...
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Whitepapers
Frame Aggregation and Concatenation Schemes for IEEE EDCF 802.11e: A First Order MAC and PHY Cross-Layer Model to Estimate the Throughput
Mar 2009
The IEEE 802.11 MAC protocol has several overheads that limit the maximum net throughput. Therefore, different from PHY layer enhancements of 802.11a/.11g, the upcoming IEEE 802.11n standard will...
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WLAN-Based Real Time Vehicle Locating System
Mar 2009
This paper presents a Wireless Local Area Network (WLAN)-based real time system for indoors and outdoors vehicle localization. The proposed solution uses a neural network trained with a map of...
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Characterization of Vertical Handoff Delay for Mobile IP Based 3G/WLAN Integrated Networks
Mar 2009
Mobile IP is one of the popular mobility solution and a viable candidate for the Beyond 3rd Generation (B3G) networks such as the integrated 3rd Generation Universal Mobile Telecommunications...
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Towards an Optimisation of Parameters Setting in WLANs
Mar 2009
This paper studies performance optimisation in WLANs, by means of Quality of Service (QoS) algorithms. The 802.11e standard for QoS is analyzed, compared to legacy ones, new algorithms being...
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On the Processor Sharing of File Transfers in Wireless LANs
Mar 2009
The authors study the performance of FTP file transfers over a WLAN and propose a new analytic model that translates the highly complex dynamics of the FTP/TCP/IP/MAC-stack, and their...
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Optimisation of Radio Access Network Operation Introducing Self-X Functions
Mar 2009
With the deployment of next generation (4G) mobile radio systems an additional radio access network is established. A variety of different Radio Access Technologies (RATs) will be operated in...
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Distributed Opportunistic Packet Scheduling Policy in Wireless LANs
Jul 2008
Due to the fluctuations of wireless channels, the authors can use opportunistic scheduling to exploit multiuser diversity. The conventional opportunistic scheduling is not applied to wireless LANs...
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