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wireless lan
(1554 results)-
White Papers
Method for Reducing of Noise by Improving Signal-to-Noise-Ratio in Wireless LAN
Sep 2011
The Signal to Noise Ratio (SNR) is one of the important measures for reducing the noise. It is a technique that uses a Linear Prediction Error Filter (LPEF) and an Adaptive Digital Filter (ADF) to...
Provided by Sri Venkateswara University
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White Papers
Noise Analysis and Detection Based on RF Energy Duration in Wireless LAN
Sep 2011
Noise is the major problem while working with wireless LAN. In this paper, the authors analyze the noise by using active receiving antenna and also propose the detection mechanism based on RF...
Provided by Sri Venkateswara University
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White Papers
Towards Stadium-Scale Wireless Media Streaming
Jan 2011
This paper proposes a scalable architecture for multimedia streaming in wireless LANs. Current IEEE 802.11 WLANs can support tens of media streaming users. The authors propose a hierarchical...
Provided by University of Calgary
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White Papers
Comparing Wired-Side and Wireless-Side WLAN Monitoring Techniques: A Case Study
Jul 2007
Wireless Local Area Networks (WLANs) have become omnipresent: WLANs are available at airports, coffee shops, university campuses, corporate environments, and homes. This surge in the popularity of...
Provided by University of Calgary
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White Papers
Comparing Wireless N (IEEE 802.11n) and Wireless G (IEEE 802.11g) Standards in Terms of Performance and Reliability
Jul 2011
After the emergence of IEEE 802.11, Wi-Fi has made a big impact on the wireless network environment. With decent data rate available lately at low cost, implementation of wireless networks are...
Provided by International Association of Engineers
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White Papers
Optimal Channel-Aware ALOHA Protocol for Random Access in WLANs With Multipacket Reception and Decentralized Channel State Information
Jun 2008
Perfect decentralized Channel State Information (CSI) is utilized to design an optimal distributed Medium Access Control (MAC) protocol for Wireless Local Area Networks (WLANs) with the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
An Opportunistic Cognitive MAC Protocol for Coexistence With WLAN
Sep 2008
In last decades, the demand of wireless spectrum has increased rapidly with the development of mobile communication services. Recent studies recognize that traditional fixed spectrum assignment...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
WLAN Based Pose Estimation for Mobile Robots
Jul 2008
Nowadays, many buildings are equipped with a WLAN infrastructure, as an inexpensive communication technology. In this paper a method to estimate position and heading (pose) of a mobile robot using...
Provided by IFAC (International Federation of Accountants)
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Case Studies
Motorola Case Study: Glanbia Foods
Jan 2008
Glanbia Foods has implemented Symbol Technologies' TaskMaster enhanced operations control product in its cheese distribution centre in Oswestry, Shropshire. Glanbia upgraded from their previous...
Provided by Motorola
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White Papers
Trusted AP Policies on a Wireless LAN Controller
Dec 2007
Trusted AP policies are a security features in the controller that are designed to be used in scenarios where customers have a parallel autonomous AP network along with the controller. In that...
Provided by Cisco Systems
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White Papers
RF Spectrum Policy: Future-Proof Wireless Investment Through Better Compliance
Jan 2008
Radio Frequency (RF) spectrum is an overlooked but critical resource. It is through the spectrum between 800 MHz and 5.9 GHz that an organization will connect laptops and PDAs to the network, talk...
Provided by Cisco Systems
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White Papers
Implementing Frequency Selective Fading for OPNET's Wireless LAN Modules
Jul 2008
In OFDM-based IEEE 802.11 Wireless LANs, adapting the modulation type per sub-carrier to the frequency selectivity of the wireless channel leads to significant performance improvements. To...
Provided by Aachen University
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White Papers
A Dual Distance Measurement Scheme for Indoor IEEE 802.11 Wireless Local Area Networks
Sep 2007
In this paper, the authors address the problem of distance measurement in indoor IEEE 802.11 WLANs. The Received Signal Strength Indicator (RSSI) and the Signal Propagation Time (SPT) have been...
Provided by Technische Universität Berlin
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White Papers
Energy Saving Strategies for Mobile Devices Using Wake-Up Signals
Jul 2008
Voice-over-IP (VoIP) has rapidly gained popularity in the last years, especially on smartphones platforms. In fact, WLAN chip-sets are becoming more common on smartphones, allowing users to use...
Provided by Association for Computing Machinery
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White Papers
Network Coding for Mobile Devices - Systematic Binary Random Rateless Codes
Apr 2009
In this paper, the authors consider the implementation of Random Linear Network Coding (RLNC) on battery constrained mobile devices with low computational capabilities such as; sensors, mobile...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Propagation Characteristics for a 60 GHz Wireless Body Area Network (WBAN)
Aug 2010
The 60 GHz band is an unlicensed band which features a wide communication bandwidth and a low probability of intercept due to high oxygen absorption. The wide bandwidth allows for a high volume of...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Back-Off Scheme for IEEE802.11 Wireless LANs
May 2008
Conventional IEEE802.11 wireless LANs employ the binary exponential back-off scheme to determine a back-off window size. Performance evaluations of the binary exponential back-off scheme and...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
An Enhanced Autorate Algorithm for Wireless Local Area Networks Employing Loss Differentiation
Jan 2008
Channel conditions in Wireless Local Area Networks (WLANs) are variable due to mobility and interference. Autorate algorithms are commonly used in WLANs to maximize the data rate over the variable...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
An Energy-Efficient MAC Protocol With Downlink Traffic Scheduling Strategy in IEEE 802.11 Infrastructure WLANs
Feb 2011
To support mobility, mobile devices are powered by batteries with limited energy. Thus, the good design of energy efficiency becomes one of the most important issues in wireless networks. A...
Provided by Reed Elsevier
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White Papers
Prediction-Based Routing for Vehicular Ad Hoc Networks
Mar 2009
Development in short-range Wireless LAN (WLAN) and long-range Wireless WAN (WWAN) technologies have motivated recent efforts to integrate the two. This creates new application scenarios that were...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
An Indoor Positioning Algorithm With Kernel Direct Discriminant Analysis
Jun 2010
Location estimation based on Received Signal Strength (RSS) in WLAN environment is an attractive method for indoor positioning system. Unfortunately, due to the explicit non-linearity and...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Seamless Video Session Handoff Between WLANs
Dec 2009
Handoff in a distributed IEEE 802.11 Wireless LAN network is a source of significant amount of problems on the video transmission environment. The visual quality of video streaming applications is...
Provided by University of Brasilia
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White Papers
CACAO: Distributed Client-Assisted Channel Assignment Optimization for Uncoordinated WLANs
Oct 2011
IEEE 802.11 WLANs are becoming more and more popular in homes and urban areas. As compared to traditional WLAN setups (such as in campuses) where knowledgeable network administrators can make...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
An Experimental Study of Inter-Cell Interference Effects on System Performance in Unplanned Wireless LAN Deployments
Mar 2008
In this paper, the authors report on their experimental study of the effects of inter-cell interference on IEEE 802.11 performance. Due to growing use of Wireless LANs (WLANs) in residential areas...
Provided by Reed Elsevier
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White Papers
Achieving Temporal Fairness in Multi-Rate 802.11 WLANs With Capture Effect
May 2008
This paper proposes new MAC layer Transmission OPportunity (TXOP) adaptation algorithms for achieving temporal fairness in multi-rate 802.11 WLANs, which take underlying capture effect into...
Provided by Rutgers University
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White Papers
On the Symmetry of User Mobility in Wireless Networks
May 2011
In this paper analyzed WLAN - GPS -and synthetic traces that record mobility in a variety of network environments. The authors observe that from a macroscopic level, human mobility is symmetric....
Provided by UC Regents
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Whitepapers
How to prime your WLAN for employee devices
Nov 2011
The modern smart device has had a transformative effect on the enterprise. One result of this transformation of IT-supported mobile endpoints has been the rapid influx of employee-owned devices;...
Provided by Aruba Networks
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Whitepapers
Six iPad tests for multimedia-grade Wi-Fi
Nov 2011
Along with most companies, the University of Ottawa has seen a massive increase in the numbers of highly mobile devices such as iPhones, Androids and iPads attached to the network. The combination...
Provided by Aruba Networks
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Whitepapers
Enterprise wireless networks add speed with 802.11n
Nov 2011
The IEEE 802.11n standard and Wi-Fi Alliance 802.11n certification herald a new world for enterprise wireless networks. 802.11n brings significantly higher data rates and more reliable coverage...
Provided by Aruba Networks
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White Papers
Mechanisms of Reducing Reauthetication Delay on IEEE 802.11 WLANs
Jun 2009
In this paper, the authors present of mechanisms for reducing re-authentication delay in Institute of Electrical and Electronics Engineers (IEEE) 802.11 Wireless Local Area Networks (WLAN). They...
Provided by Helsinki University of Technology
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White Papers
Identifying Mobiles Hiding Behind Wireless Routers
Feb 2011
The Network Address Translation technique (NAT) is widely used in wireless routers. It is a low cost solution to IPv4 address space limitations. However, cyber criminals may abuse NAT and hide...
Provided by University of Massachusetts
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White Papers
BSMX - A Prototype Implementation for Distributed Aggregation of Sensor Data
Nov 2010
Beacon-based Short Message eXchange (BSMX) is a system to exchange small-sized messages between unassociated WLAN devices like smartphones or access points. In this paper, the authors describe...
Provided by Association for Computing Machinery
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White Papers
Novel Metrics and Experimentation Insights for Dynamic Frequency Selection in Wireless LANs
Sep 2011
The rapidly increasing popularity of IEEE 802.11 WLANs has created unprecedented levels of congestion in the unlicensed frequency bands, especially in densely populated urban areas. Performance...
Provided by Association for Computing Machinery
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White Papers
Contention and Traffic Load-Aware Association in IEEE 802.11 WLANs: Algorithms and Implementation
Apr 2011
Efficient association of a station with the appropriate access point has always been a challenging problem. The standard approach of considering only the Received Signal Strength, has recently...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
On the Energy Efficiency of Cognitive Radios - A Study of the Ad Hoc Wireless LAN Scenario
Jul 2011
Cognitive radios have been proposed in recent years to make more efficient use of the wireless spectrum and alleviate congestion on widely used frequency bands. A key aspect of these radios is the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Distributed Clock Synchronization in Discrete Event Simulators for Wireless Factory Automation
Aug 2010
Between the wired and the wireless world a synchronization gap in terms of accuracy obviously exists due to the different possibilities of the technologies. This paper investigates means to access...
Provided by Austrian Academy of Sciences
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White Papers
Software Support for Clock Synchronization Over IEEE 802.11 Wireless LAN With Open Source Drivers
Aug 2010
Between the wired and the wireless world a synchronization gap in terms of accuracy obviously exists due to the different possibilities of the technologies. This paper investigates means to access...
Provided by Austrian Academy of Sciences
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White Papers
System Integration of an IEEE 802.11 Based TDoA Localization System
Oct 2010
Network entities with synchronized clocks are an enabler for many interesting and innovative applications. Localization of mobile WLAN devices by means of propagation delay measurements and...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Clock Synchronization in Wireless LANs Without Hardware Support
Aug 2010
One typical approach to provide industrial automation networks with real-time guarantees is to plan a communication timeframe, which relies on synchronized clocks at all communication...
Provided by Austrian Academy of Sciences
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White Papers
Localisation of Wireless LAN Nodes Using Accurate TDOA Measurements
Jan 2010
Time based localisation methods like GPS are widely used for outdoor navigation, whereas indoor navigation is typically performed only on a cell-basis or based on the Received Signal Strength...
Provided by Austrian Academy of Sciences
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White Papers
Multimedia Wireless Transmission With Network Coding
Sep 2007
In recent years, Wireless Local Area Networks (WLAN) have become the premier choice for many homes and enterprises. WiMAX (Worldwide Interoperability for Microwave Access) has also emerged as the...
Provided by Oregon State University
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White Papers
A Low Insertion Loss, High Linearity, T/R Switch in 65 Nm Bulk CMOS for WLAN 802.11g Applications
Jan 2008
A Transmit-Receiver (T/R) switch is fabricated in a 65 nm CMOS process for WLAN 802.11g applications. By floating the triple well device, the switch achieves low insertion loss, high power...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Interference Analysis and Transmit Power Control in IEEE 802.11a/h Wireless LANs
Oct 2007
Reducing the energy consumption by wireless communication devices is perhaps the most important issue in the widely deployed and dramatically growing IEEE 802.11 WLANs (Wireless Local Area...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Energy-Efficient Airtime Allocation in Multi-Rate Multi-Power-Level Wireless LANs
Aug 2007
This paper considers the energy-conservation problem in multi-rate multi-power-level Wireless Local Area Networks (WLANs). This problem is addressed from a unique angle the system-level fairness...
Provided by Association for Computing Machinery
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White Papers
Analytical Study of TCP Performance Over IEEE 802.11e WLANs
Oct 2008
IEEE 802.11 Wireless LAN (WLAN) has become a prevailing solution for broadband wireless Internet access while the Transport Control Protocol (TCP) is the dominant transport-layer protocol in the...
Provided by Springer Science+Business Media
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White Papers
A Lagrangian Approach for the Optimal Placement of Wireless Relay Nodes in Wireless Local Area Networks
Jan 2011
The throughput capacity of WLANs can be improved the authors propose an optimization formulation based on Lagrangian relaxation and a subgradient algorithm to compute the best placement of a fixed...
Provided by University of Toronto
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White Papers
Privacy Analysis of User Association Logs in a Large-Scale Wireless LAN
Jan 2011
User association logs collected from a large-scale wireless LAN record where and when a user has used the network. Such information plays an important role in wireless network research. One...
Provided by Dartmouth College
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White Papers
Energy-conservation in 802.11 WLANs via Transmission-strategy-aware Airtime Allocation
Apr 2008
In a typical 802.11 Wireless Local Area Network (WLAN), different wireless stations may communicate with the Access Point (AP) with different transmission rates, transmit-power levels, and data...
Provided by Elsevier
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White Papers
Collision-Aware Rate Adaptation in multi-rate WLANs: Design and implementation
Jun 2010
Many rate adaptation algorithms have been proposed for IEEE 802.11 Wireless LAN devices and most of them operate in an open-loop manner, i.e., the transmitter adapts its transmission rate without...
Provided by Elsevier
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White Papers
Design and Experimental Evaluation of Multi-User Beamforming in Wireless LANs
Sep 2010
Multi-User MIMO promises to increase the spectral efficiency of next generation wireless systems and is currently being incorporated in future industry standards. Although a significant amount of...
Provided by Association for Computing Machinery
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White Papers
Performance Analysis of Convolution Coded WLAN Physical Layer Under Different Modulation Techniques
Oct 2010
WLAN plays an important role as a complement to the existing or planned cellular networks which can offer high speed voice, video and data service up to the customer end. The aim of this paper is...
Provided by Educate India Society
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White Papers
Comparing Mobility and Predictability of VoIP and WLAN Traces
Sep 2007
Realistic modeling of user mobility is one of the most critical research areas in wireless networks. Mobility data based on real human behaviors may give them the opportunity to improve wireless...
Provided by University of Florida
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White Papers
Gender-Based Feature Analysis in Campus-Wide WLANs
Jun 2007
WLAN deployment across university campuses has risen rapidly in recent years. There has been a marked increase in mobile users and traffic as a result. Analyzing usage of WLAN is currently a major...
Provided by University of Florida
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White Papers
Gender-Based Grouping of Mobile Student Societies
Jan 2008
The next frontier for sensor networks is sensing the human society. Several mobile societies are emerging, especially with wide deployment of Wireless LANs (WLANs) on campuses. With the rapid...
Provided by University Of Florida, Gainesville
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White Papers
Human Behavior and Challenges of Anonymizing WLAN Traces
Oct 2009
With the wide spread deployment of Wireless LANs (WLANs), it is becoming necessary to conduct analysis of libraries of measurements taken from such operational networks. The availability of these...
Provided by University of Florida
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White Papers
The Challenges of Accurate Mobility Prediction for Ultra Mobile Users
Feb 2009
Realistic modeling of user mobility is one of the most critical research areas in wireless networks. Currently, several mobility models are proposed based on the analysis of real WLAN traces....
Provided by University Of Florida, Gainesville
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Whitepapers
Using AirWave RAPIDS Rogue Detection to Implement Your Wireless Security and PCI Compliance Strategy
Aug 2010
Wireless LANs (WLANs) are quickly becoming the connectivity platform of choice across all types of organizations because of their flexibility, convenience and ability to improve productivity. As...
Provided by Aruba Networks
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Whitepapers
Driving Operational Efficiency: A Guide to Using AirWave Wireless Management Suite for Service Desk Troubleshooting
Nov 2010
In a typical IT organization, the service desk takes incoming user support calls and determines whether the problem is an individual user or device issue or a broader network issue that might...
Provided by Aruba Networks
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Whitepapers
AirWave VisualRF Location and Mapping: Improving Operations Efficiency Throughout the Wireless Network Lifecycle
Aug 2009
Driven by the need for mobility, higher productivity and cost reductions through network rightsizing, wireless networks are becoming ubiquitous within all enterprises, government organizations and...
Provided by Aruba Networks
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Whitepapers
Operating Wireless LANs for High Reliability and Performance: Six Best Practices That You Can Implement Today
Jun 2010
802.11n technologies have reached maturity. They are reliable, high-performing, dependable, secure, and often very affordable. These characteristics are making it possible to offer the benefits of...
Provided by Aruba Networks
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Whitepapers
The Convergence of Enterprise Telecom Services: BlackBerry Mobile Voice System on the Aruba Networks Wireless LAN Infrastructure
Apr 2010
Modern enterprises are becoming more widely distributed, and workers are increasingly mobile. Fewer employees are working in large corporate offices, with estimates of the remote workforce as high...
Provided by Aruba Networks
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White Papers
Analyzing WLANs Standards for Wireless Sensor Network
Jan 2011
Wireless sensor network is a special kind of wireless network, design to communicate with distributes wireless nodes (Which supplies the information). Data collection from leaf sensor node to the...
Provided by Kurukshetra University
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White Papers
Wireless LAN Security System
Jan 2010
In just the past few years wireless LAN has come to occupy a significant niche in the local area network market. Increasingly. Organization are finding that WLAN are an indispensable adjunct to...
Provided by Foundation University Islamabad (FUI)
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White Papers
IEEE WLANs Standards for Mobile Ad-Hoc Networks (MANETs): Performance Analysis
Nov 2010
Mobile Ad hoc NETworks(MANETs) catch the great attention of researchers because of its unique characteristics like independent of infrastructure, dynamic topology behavior, limited energy source,...
Provided by Kurukshetra University
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White Papers
Wireless Control for an Induction Motor
Sep 2010
This paper discusses the development of wireless structure control of an induction motor scalar drives. This was realised up on the wireless WiFi networks. This strategy of control is ensured by...
Provided by Alumni.NET
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White Papers
Wireless LANS
Sep 2010
Interest in wireless local area networks (wireless LANs or WLANs) has been growing exponentially since late 2001, the year that first saw the deployment of wireless LANs in a number of public...
Provided by American Library Association
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White Papers
802.11 Wireless LAN Multiplayer Game Capacity and Optimization
Oct 2009
Real-time multiplayer games are a popular application of networks and as IEEE 802.11 wireless networks are widely used, games are expected to be widely played on wireless networks. However, 802.11...
Provided by National University Of Ireland
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White Papers
QR-RLS Based Adaptive Channel TEQ for OFDM Wireless LAN
Aug 2007
In this paper, QR-RLS based TEQ adapting is proposed. For QR decomposition two methods, Gram Schmidt orthogonalization process and Givens rotation are used and compared in terms of computational...
Provided by DA-IICT
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White Papers
Mobile Agents in Wireless LAN and Cellular Data Networks
Jan 2010
Advancing technology in wireless communication offers users anytime, anywhere access to information and network resources without restricting them to the fixed network infrastructure. Mobile...
Provided by Science Publications
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White Papers
Fine-Grained Channel Access in Wireless LAN
Sep 2010
Modern communication technologies are steadily advancing the PHYsical Layer (PHY) data rate in wireless LANs, from hundreds of Mbps in current 802.11n to over Gbps in the near future. As PHY data...
Provided by BeiHang University
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White Papers
Research and Design of Mine Electromechanical Equipment Closed-Loop Inspection System Based on Wireless Sensor Network
Aug 2010
This paper has analyzed the Significance of applying point-Inspection-system in Coal mining enterprises and proposed a solution of electromechanical equipment closed-loop inspection system....
Provided by Northwestern Polytechnical University
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White Papers
Performance Analysis of Wired and Wireless LAN Using Soft Computing Techniques - A Review
Sep 2010
The wired Computer Networks provide a secure and faster means of connectivity but the need of mobility i.e. anywhere, anytime and anyone access is tilting the network users towards wireless...
Provided by Global Journals
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White Papers
Passive Online Detection of 802.11 Traffic Using Sequential Hypothesis Testing With TCP ACK-Pairs
Mar 2009
This paper proposes two online algorithms to detect 802.11 traffic from packet-header data collected passively at a monitoring point. These algorithms have a number of applications in real-time...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
ER: Efficient Retransmission Scheme for Wireless LANs
Dec 2007
Wireless LANs (WLANs) have been deployed at a remarkable rate at university campuses, office buildings, airports, hotels, and malls. Providing efficient and reliable wireless communications is...
Provided by Association for Computing Machinery
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White Papers
Closed Loop RF Management Algorithm for Enterprise High Density WLANs
Jun 2007
The growing adoption of 802.11 networks in the enterprise segment has led to the emergence of High Density (HD) WLAN scenarios where large (100-1000) numbers of clients are serviced by 10-100s of...
Provided by University of Washington
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White Papers
Evaluation of Security Architecture for Wireless Local Area Networks by Indexed Based Policy Method: A Novel Approach
Jul 2008
In this paper, the authors have focus existing and proposed WLAN security technologies designed to improve 802.11 standard by applying security policies. The authors have extensively analyzed the...
Provided by IIT
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White Papers
Pushing the Limits of Address Based Authentication: How to Avoid MAC Address Spoofing in Wireless LANs
Jun 2009
It is well-known that in wireless local area networks, authenticating nodes by their MAC addresses is not secure since it is very easy for an attacker to learn one of the authorized addresses and...
Provided by Middle East Technical University
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White Papers
Contention Window and Transmission Opportunity Adaptation for Dense IEEE 802.11 WLAN Based on Loss Differentiation
Feb 2008
In High Density (HD) WLANs, packet losses can occur due to hidden terminals (Asynchronous interference) or collisions (Synchronous interference). Without differentiating above packet losses, the...
Provided by University of Washington
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White Papers
CSMA Self-Adaptation Based on Interference Differentiation
Jul 2009
This paper addresses the design challenge of interference mitigation in the emerging High Density (HD) wireless LAN. It is proposed to differentiate interference according to the energy and timing...
Provided by University of Washington
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White Papers
Sequential Authentication Concept to Improve WLAN Handover Performance
Sep 2009
Service provisioning in customer satisfying quality is an important issue for current and future network operators. Real-time services suffer from network performance influences, e.g. delay,...
Provided by Springer Science+Business Media
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White Papers
BSMX - A Prototype Implementation for Distributed Aggregation of Sensor Data
Nov 2010
Beacon-based Short Message eXchange (BSMX) is a system to exchange small-sized messages between unassociated WLAN devices like smartphones or access points. In this paper, the authors describe...
Provided by Association for Computing Machinery
-
White Papers
Novel Metrics and Experimentation Insights for Dynamic Frequency Selection in Wireless LANs
Sep 2011
The rapidly increasing popularity of IEEE 802.11 WLANs has created unprecedented levels of congestion in the unlicensed frequency bands, especially in densely populated urban areas. Performance...
Provided by Association for Computing Machinery
-
White Papers
Contention and Traffic Load-Aware Association in IEEE 802.11 WLANs: Algorithms and Implementation
Apr 2011
Efficient association of a station with the appropriate access point has always been a challenging problem. The standard approach of considering only the Received Signal Strength, has recently...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
On the Energy Efficiency of Cognitive Radios - A Study of the Ad Hoc Wireless LAN Scenario
Jul 2011
Cognitive radios have been proposed in recent years to make more efficient use of the wireless spectrum and alleviate congestion on widely used frequency bands. A key aspect of these radios is the...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Distributed Clock Synchronization in Discrete Event Simulators for Wireless Factory Automation
Aug 2010
Between the wired and the wireless world a synchronization gap in terms of accuracy obviously exists due to the different possibilities of the technologies. This paper investigates means to access...
Provided by Austrian Academy of Sciences
-
White Papers
Software Support for Clock Synchronization Over IEEE 802.11 Wireless LAN With Open Source Drivers
Aug 2010
Between the wired and the wireless world a synchronization gap in terms of accuracy obviously exists due to the different possibilities of the technologies. This paper investigates means to access...
Provided by Austrian Academy of Sciences
-
White Papers
System Integration of an IEEE 802.11 Based TDoA Localization System
Oct 2010
Network entities with synchronized clocks are an enabler for many interesting and innovative applications. Localization of mobile WLAN devices by means of propagation delay measurements and...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Clock Synchronization in Wireless LANs Without Hardware Support
Aug 2010
One typical approach to provide industrial automation networks with real-time guarantees is to plan a communication timeframe, which relies on synchronized clocks at all communication...
Provided by Austrian Academy of Sciences
-
White Papers
Localisation of Wireless LAN Nodes Using Accurate TDOA Measurements
Jan 2010
Time based localisation methods like GPS are widely used for outdoor navigation, whereas indoor navigation is typically performed only on a cell-basis or based on the Received Signal Strength...
Provided by Austrian Academy of Sciences
-
White Papers
Localisation in Wireless Sensor Networks
Jul 2009
The traditional task of a sensor network is data collection and aggregation for further processing. In the case of mobile networks this is usually done via wireless technologies. However, with the...
Provided by Austrian Academy of Sciences
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White Papers
Preamble Detection for Wireless Clock Synchronization in Frequency Selective Fading Channels
Aug 2008
Exact client localization has been an obstacle in the use of WLAN in factories and offices for providing location based service. With respect to a novel localization scheme in WLAN based on...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Coherent Preamble Detection and Packet Decoding for Wireless Clock Synchronization Using IEEE 802.11b WLAN
Aug 2008
The usage of WLANs (Wireless Local Area Networks) for both office and non office (e.g. factory automation) applications is one of today's upcoming trends. However the usage of WLAN suffers from...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
System Design and Implementation of Seamless Handover Support Enabling Real-Time Telemetry Applications for Highly Mobile Users
Oct 2008
IEEE 802.11 is one of the most mature WLAN technologies and system components are available at very low cost. This makes it prevailing to reuse 802.11 (hardware) components for system designs...
Provided by Association for Computing Machinery
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White Papers
Experimental Evaluation of Asymmetric QoS in IEEE 802.11g Wireless Networks
Nov 2011
Quality of Service (QoS) can be provided in a Wireless Local Area Network (WLAN) using the Enhanced Distributed Channel Access (EDCA) mechanism specified in IEEE 802.11e. However, 802.11e WLANs...
Provided by Association for Computing Machinery
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White Papers
Scheduling Issues in Multi-Channel Wireless Networks
Jun 2009
Scheduling decisions can have a pronounced impact on the performance of multi-radio wireless systems. In this paper, the authors study the effects of dispatch policies and queue scheduling...
Provided by University of Calgary
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White Papers
Opportunistic Localization Scheme Based on Linear Matrix Inequality
Apr 2009
Enabling self-localization of mobile nodes is an important problem that has been widely studied in the literature. The general conclusions are that an accurate localization requires either...
Provided by University of Padova
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White Papers
Cooperative Carrier Signaling: Harmonizing Coexisting WPAN and WLAN Devices
Jun 2011
The unlicensed ISM spectrum is getting crowded by WLAN and WPAN users and devices. Spectrum sharing within the same network of devices can be arbitrated by existing MAC protocols, but the...
Provided by University of Michigan
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White Papers
Modeling Channel Conflict Probabilities Between IEEE 802.11b and IEEE 802.15.1 Networks
Jun 2007
With the increasingly deployed Wireless Local/ Personal Area Network (WLAN/WPAN) devices, channel conflict has become very frequent and severe when one WLAN/WPAN technology coexists with other...
Provided by Institute of Information Science
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White Papers
A Frame Aggregation Scheduler for IEEE 802.11n
Feb 2010
Wireless Local Area Networks (WLANs) based on the IEEE 802.11 standard are widely deployed in the home and enterprise segments across the globe. The IEEE 802.11n is the latest amendment that aims...
Provided by Anna University
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White Papers
W-Meter : An Open-Source WLAN Product Evaluation Framework
Apr 2011
Wireless LAN products based on the IEEE 802.11 standards are very popular across home and enterprise markets globally. The certification programmed conducted by the Wi-Fi alliance is expensive and...
Provided by Anna University
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White Papers
Orthogonal Frequency Division Multiple Access in WiMAX and LTE - A Comparison
Feb 2010
Orthogonal Frequency Division Multiple Access (OFDMA) has been adopted by all the proposals which have been considered for the Fourth Generation (4G) wireless technologies. Specifically, the two...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Analysis of Open Source Drivers for IEEE 802.11 WLANs
May 2010
The purpose of this paper is to analyze the open source IEEE 802.11 Wireless Local Area Network (WLAN) stack implementation for further enhancement and implementations. The authors discuss the...
Provided by Anna University
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White Papers
Secure Handover in Enterprise WLANs: CAPWAP, HOKEY, and IEEE 802.11r
Jul 2008
As Wireless LANs become more and more ubiquitous, the number and types of applications they are supporting is ever-increasing. As real-time performance requirements begin to emerge, the latency...
Provided by University of Maryland
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White Papers
A Timer-Based Session Setup Procedure in Cellular-WLAN Integrated Systems
Apr 2011
The multiple registration scheme can reduce signaling overhead at the expense of increased session setup latency in cellular-WLAN integrated systems. In this paper, the authors propose a...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
GUIDE-Gradient: A Guiding Algorithm for Mobile Nodes in WLAN and Ad-Hoc Networks
Dec 2009
Whereas there is a lot of work related to finding the location of users in WLAN and ad-hoc networks, guiding users in these networks remains mostly an unexplored area of research. In this paper,...
Provided by Springer Science+Business Media
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GUIDE: Guiding Users in Distributed Environments for WLAN and Ad Hoc Networks
Jul 2008
Whereas there is a lot of work related to finding the location of users in WLAN and ad hoc networks, guiding users in these networks remains an unexplored area of research. In this paper, the...
Provided by Universidad Nacional Autonoma de Mexico
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Impact of Aggregate Interference on Meteorological Radar From Secondary Users
Jan 2011
In this paper, the authors investigate the impact of aggregate interference in a secondary spectrum access system. Particularly, meteorological radar operating in 5.6 GHz band is considered to be...
Provided by KTH - Royal Institute of Technology
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Dynamic Adaptation of CSMA/CA MAC Protocol for Wide Area Wireless Mesh Networks
Feb 2008
Though the popular IEEE 802.11 DCF is designed primarily for Wireless LAN (WLAN) environments, today it is being widely used for wide area wireless mesh networking. The protocol parameters of IEEE...
Provided by Reed Elsevier
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IEEE 802.11s Wireless Mesh Networks
May 2008
Nowdays, WLAN technology covers a wide variety of devices and applications used by many users around the globe. The most common standard in WLANs is the well known IEEE 802.11 which comprises a...
Provided by Lund University
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Handover Between GSM (2G), UMTS (3G) and Wireless Local Area Networks (WLANs)
May 2008
Investigation of HandOvers (HO) between different radio access technologies opens up a wide range of optimization possibilities in terms of utilization of network resources and better coverage...
Provided by Lund University
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Performance Analysis of Joint Radio Resource Management Strategies for Beyond 3G Networks
Jul 2009
In beyond 3G networks the user will not be aware of the access network technology used to provide a telecommunications service. Heterogeneous network technologies will be seamlessly integrated in...
Provided by Universidade do Porto
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Can They Hear Me Now?: A Case for a Client-Assisted Approach to Monitoring Wide-Area Wireless Networks
Nov 2011
The authors present WiScape, a framework for measuring and under-standing the behavior of wide-area wireless networks, e.g., city-wide or nation-wide cellular data networks using active...
Provided by Association for Computing Machinery
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A Global Optimisation Algorithm for 802.11 WLAN Radio Resource Management
Feb 2008
The wireless link is still the bottleneck in 802.11 WLAN systems, especially in a public WLAN deployment with high-demand users. The most common way of improving the system performance is by...
Provided by Institute of Electrical and Electronics Engineers
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AP Load Balancing and AP Fallback in Unified Wireless Networks
Jul 2007
This paper discusses how Access Point (AP) load balancing and AP fallback work in the Cisco Unified Wireless solution. This paper also explains how to set up multiple Wireless LAN (WLAN)...
Provided by Cisco Systems
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Malicious or Selfish- Analysis of Carrier Sense Misbehavior in IEEE 802.11 WLAN
Oct 2009
The behavior of selfish users, which does not respect the backoff procedure of IEEE 802.11 WLAN, has been nicely studied in game-theoretic frameworks. However, in these studies, the effect of...
Provided by Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering
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Sniffer Channel Selection for Monitoring Wireless LA
May 2009
Wireless sniffers are often used to monitor APs in Wireless LANs (WLANs) for network management, fault detection, traffic characterization, and optimizing deployment. It is cost effective to...
Provided by University of Connecticut
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Virtual Partitioning for Connection Admission Control in Cellular/WLAN Interworking
Dec 2007
Wireless Wide Area Networks (WWANs) and Wireless Local Area Networks (WLANs) have complementary characteristics which make them suitable to jointly offer an ubiquitous wireless solution. In...
Provided by University of British Columbia
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An Analysis of the Heterogeneity and IP Packet Reordering Over Multiple Wireless Networks
Mar 2009
With the increasing deployment of wireless technologies, such as WLAN, HSDPA, and WiMAX, it is often the case that simultaneous coverage of several access networks is available to a single user...
Provided by University of Oslo
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Virtualization of 802.11 Interfaces for Wireless Mesh Networks
Feb 2011
Equipping wireless devices with multiple radio interfaces enables multi-channel communication that has attracted recent interest due to its significant benefits in terms of exploiting the...
Provided by University of Passau
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On the Service Differentiation Capabilities of EY-NPMA and 802.11 DCF
Jan 2011
Most existing WLAN access mechanisms cannot provide QoS assurances. Even those that are QoS aware can only provide relative service differentiation. Based on EY-NPMA, the HIPERLAN Medium Access...
Provided by Aristotle University of Thessaloniki
