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wi-fi (802.11)
(2384 results)-
White Papers
NAPman: Network-Assisted Power Management for WiFi Devices
Jun 2010
WiFi radios in smart-phones consume a significant amount of power when active. The 802.11 standard allows these devices to save power through an energy-conserving Power Save Mode (PSM). However,...
Provided by Association for Computing Machinery
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White Papers
CENTAUR: Realizing the Full Potential of Centralized WLANs Through a Hybrid Data Path
Sep 2009
Enterprise WLANs have made a dramatic shift towards centralized architectures in the recent past. The reasons for such a change have been ease of management and better design of various control...
Provided by Association for Computing Machinery
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White Papers
802.11n Under the Microscope
Oct 2008
The authors present an experimental study of IEEE 802.11n (High throughput extension to the 802.11 standard) using commodity wireless hardware. 802.11n introduces a variety of new mechanisms...
Provided by Association for Computing Machinery
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White Papers
Wireless Device Identification With Radiometric Signatures
Aug 2008
The authors design, implement, and evaluate a technique to identify the source Network Interface Card (NIC) of an IEEE 802.11 frame through passive radio-frequency analysis. This technique, called...
Provided by Association for Computing Machinery
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White Papers
Error Bound of Collision Probability Estimation in Non-Saturated IEEE 802.11 WLANs
Jul 2007
The authors analytically prove that the error in the channel idle time-based collision probability estimation in face of non-saturated stations is bounded by 2/(CWmin+1) in the IEEE 802.11...
Provided by Institute of Electronics, Information and Communication Engineers
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White Papers
IEEE 802.11 Based MAC Improvements for MANET
Dec 2010
Broadcasting is one of the essential communication models of MANETs. Many MANET multicast routing protocols rely heavily upon MAC layer's broadcast support. However, the broadcast mechanism of the...
Provided by BITS
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Whitepapers
Introduction to the IP Multimedia Subsystem (IMS): IMS Basic Concepts and Terminology
Aug 2007
This definition is from the 3G Partnership Project (3GPP) and has been further embraced by the 3GPP2, the European Telecommunications Standards Institute (ETSI), and the WiMax Forum. This...
Provided by F5 Networks
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White Papers
Outdoor Localization of a WiFi Source With Unknown Transmission Power
Dec 2009
One threat to the reliability of GNSS systems is RF interference. One possibility for localising interference sources is to take received signal strength (RSS) measurements. To explore this...
Provided by University of New South Wales
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White Papers
IEEE 802.11 in the Large: Observations at an IETF Meeting
Sep 2007
The authors observed wireless network traffic at the 65th IETF Meeting in Dallas, Texas in March of 2006, attended by approximately 1200 engineers. The event was supported by a very large number...
Provided by Columbia University
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White Papers
Seamless Layer-2 Handoff Using Two Radios in IEEE 802.11 Wireless Networks
Jan 2011
A number of algorithms have been proposed to achieve seamless layer-2 handoff. However, none of them eliminated handoff delay completely although some of them improved handoff time significantly,...
Provided by Columbia University
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Whitepapers
Design & Development of "Programmable Security Controller (PSC) (A Nanotechnology Device)" for WiMAX/WiFi Wireless Communication
Feb 2012
WiMAX (World-wide Interoperability for Microwave Access) will offer broadband wireless access at data rate of multiple mega bits per second to the end-user within a range of several kilometers....
Provided by International forum of researchers Students and Academician
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Whitepapers
Interworking of 3G and 802.11 Networks: Present and the Future Ahead
Feb 2012
With the wide-spread deployment of 3G services in most of the countries and continuous increasing demand of Smartphones and iPhones, past has experienced a substantial increase in cellular data...
Provided by International forum of researchers Students and Academician
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Whitepapers
GI-FI (A New Wireless Technology)
May 2012
The paper presents the review about GI-FI which is a new wireless technology. GI-FI will help to push wireless communications to faster drive. For many years cables were used as a medium of...
Provided by International forum of researchers Students and Academician
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Whitepapers
Interoperability Between Wireless Networks Using FPGA Based Advanced Gateway
May 2012
In a communication network, a network node equipped for interoperability with another network can use different protocols and frame formats. So, there is a need for protocol conversion to provide...
Provided by International forum of researchers Students and Academician
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Whitepapers
Implementation of Blake and RSA in a Fast Authentication Protocol for Wireless Mesh Networks on FPGA
May 2012
Encryption techniques like BLAKE and RSA is implemented in a fast authentication protocol based on tickets, which supports fast handoff mainly in real time applications like VoIP in Wireless Mesh...
Provided by International forum of researchers Students and Academician
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Whitepapers
Spectrum Management Policy for Wireless Ad Hoc Cognitive Radio Networks
May 2011
Wireless communication attracts enormous investments, while at the same time user requirements continuously increase. Moreover, evolution in wireless technologies should keep pace with the...
Provided by International forum of researchers Students and Academician
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White Papers
Delivering the Best User Experience With Voice Over Wi-Fi Applications
Nov 2007
Voice over Wi-Fi allows users to make and receive voice calls over their Wi-Fi networks. It is rapidly gaining popularity as more voice-capable devices, such as dual-mode phones with cellular and...
Provided by Wi-Fi Alliance
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White Papers
The Network Impact of 802.11n
Apr 2008
802.11n promises to bring revolutionary advances in bandwidth, throughput, and reliability to the wireless LAN. It will also have a perhaps unforeseen impact on the wired network, as well....
Provided by Aerohive Networks
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White Papers
Enhancing QoS for Streaming Video Over WLANs
Oct 2008
Recent times have seen a tremendous surge of multimedia traffic over the Wireless Local Area Networks or WLANs. However, the bandwidth intensive multimedia traffic takes the most brunt when a WLAN...
Provided by San Diego State University
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White Papers
Voice Over IP: Improving the Quality Over Wireless LAN by Adopting a Booster Mechanism
Nov 2007
The performance of unreliable voice transmission (Voice over IP) over wireless links is measured not by the throughput but by the perceptual speech quality. The speech quality is impaired by...
Provided by Technische Universität Berlin
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White Papers
A Mobile Agent Based Architecture for Securing WLANs
May 2009
Wireless LANs are open and are vulnerable to various attacks. Techniques available to prevent Wireless LANs from these attacks are not comprehensive. In this paper the authors discuss the...
Provided by Academy Publisher
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White Papers
Wi-Fi Authentication Demystified
Oct 2008
Authentication is a critical part of any network security policy. Authentication validates the identity of a user or device, which is an important point as most people only look at authentication...
Provided by Xirrus
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White Papers
A Practical Implementation of Random Peer-to-Peer Communication for a Multiple-Robot System
Feb 2010
In this paper, the authors present a physical implementation of Random Peer-to-Peer (RP2P) communication for use in a multiple-robot system and analyze its performance. Traditionally,...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Throughput Optimization of Unplanned Wireless Mesh Networks Deployment Using Partitioning Hierarchical Cluster (PHC)
Jul 2009
Wireless mesh networks based on IEEE 802.11 technology are a scalable and efficient solution for next generation wireless networking to provide wide-area wideband internet access to a significant...
Provided by University of Malaya
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White Papers
Wireless Mobility Management With Prediction, Delay Reduction and Resource Management in 802.11 Networks
Aug 2008
In 802.11 wireless infrastructure networks, as the mobile node moves from one access point to another, the active connections will not be badly dropped if the handoff is smooth and if there are...
Provided by Swinburne University of Technology
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White Papers
Performance Analysis of Wireless Ad-Hoc Network Based on EDCA IEEE802.11e
Nov 2010
IEEE 802.11e is the enhanced version of the IEEE 802.11 MAC dedicated to provide Quality of Service of wireless network. It supports QoS by the service differentiation and prioritization...
Provided by University of Trento
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White Papers
Wireless Network Visualization and Indoor Empirical Propagation Model for a Campus WI-FI Network
Jun 2009
With the increasing use of mobile computing devices such as PDAs, laptops, and an expansion of Wireless Local Area Networks (WLAN), there is growing interest in optimizing the WLAN infrastructure...
Provided by World Academy of Science, Engineering and Technology
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White Papers
Enhanced QoS Mechanisms for IEEE 802.11e Wireless Networks
Dec 2009
The Quality-of-Service (QoS) support for wireless LANs has been a hot research topic during the past few years. In this paper, two QoS provisioning mechanisms are proposed for the employment in...
Provided by National Taipei University of Technology
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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
Prioritized Broadcast Contention Control in VANET
Feb 2010
Reliable and timely multi-hop propagation of messages among vehicles is essential for a safer and greener transportation system. Various broadcast-based forwarding strategies are envisioned for...
Provided by University of Washington
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White Papers
Modelling Throughput and Starvation in 802.11 Wireless Networks With Multiple Flows
Jul 2009
Carrier Sense Multiple Access (CSMA) protocols require stations that wish to transmit to first check the shared medium for ongoing transmissions. However, in wireless networks stations may not be...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
On Loss Differentiation for CSMA-Based Dense Wireless Network
Nov 2007
In this paper, the authors propose a novel method to differentiate packet loss based on interference energy and timing relative to desired signal in CSMA-based dense wireless networks. All...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
ARA: A Routing and Forwarding Scheme for Coordinated Wide Area Mobility
Apr 2010
The wide availability of Wi-Fi hot-spots provides mobile users with convenient access to the Internet. However, hot-spots cover only small areas and are often operated by a local authority. A user...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Saturation Throughput of IEEE 802.11 DCF in Multi-Hop Ad Hoc Networks
Sep 2008
IEEE 802.11 DCF has been widely used in wireless multi-hop ad hoc networks as the medium access control protocol. However, how well it can perform has not been well studied. In this paper, the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Analysing the Transition Between Unsaturated and Saturated Operating Conditions in 802.11 Network Scenarios
Sep 2008
The aim of this paper is an investigation of 802.11 scenarios, and in particular to evaluate the nature of the transition between unsaturated and saturated operating conditions. Most existing...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Comparative Study of Anonymous 802.11 Protocols
Oct 2008
Many anonymous communication solutions have been proposed to provide anonymous Mobile Ad hoc NETwork (MANET) communications. However, they mainly focus on the routing layer and above to hide the...
Provided by Arizona State University
-
Whitepapers
Evaluating a QoS-Supportive MAC Layer Protocol for WLANs
Sep 2008
In spite of the tremendous boom in the wireless LAN arena, applications such as streaming video and audio still bring unique and challenging Quality of Service (QoS) requirements to such networks....
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Understanding Wi-Fi-Based Connectivity From Moving Vehicles
Aug 2007
Using measurements from VanLAN, a modest-size testbed that the authors have deployed, they analyze the fundamental characteristics of Wi-Fi-based connectivity between base-stations and vehicles in...
Provided by University of Washington
-
White Papers
Trust-Based Fast Authentication for Multiowner Wireless Networks
Feb 2008
In multi-owner wireless networks, Access Points (APs) are owned and operated by different administrations, leading to significant authentication delays during handoff between APs. The authors...
Provided by University of Sydney
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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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Whitepapers
Channel Occupancy Time BasedTCP Rate Control for IEEE 802.11 DCF
Jun 2008
In multi-rate IEEE 802.11 wireless LAN, when multiple stations transmit frames at different data rates, the basic service set (BSS) suffers from "Performance anomaly" problem. In this paper, to...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Mitigating Performance Anomaly of TFRC in Multi-Rate IEEE 802.11 Wireless LANs
Dec 2009
In IEEE 802.11 Distributed Coordination Function (DCF), the multi-rate Basic Service Set (BSS) suffers from the performance anomaly issue, which brings unfairness in terms of channel occupancy...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Towards Efficient Service-level QoS Provisioning in Large-scale 802.11-based Networks
Oct 2007
Along with recent advances in mobile networking and portable computing technologies, there is a trend in the telecommunications industry toward the development of efficient ubiquitous systems that...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Channel Occupancy Time Based TCP Rate Control for Improving Fairness in IEEE 802.11 DCF
Jun 2008
In multi-rate IEEE 802.11 wireless LAN, when multiple stations transmit frames at different data rates, the Basic Service Set (BSS) suffers from "Performance anomaly" problem. In this paper, to...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
New Combined WiMAX/DSRC Infrastructure Design for Efficient Vehicular Networking
Aug 2012
In this paper, a new infrastructure of a combined Worldwide interoperability for Microwave Access (WiMAX) and Dedicated Short-Range Communications (DSRC) link layer is proposed with the purpose of...
Provided by EURASIP
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Whitepapers
Performance Enhancement of IEEE 802.11 DCF Using Novel Backoff Algorithm
Aug 2012
Advances in wireless communication technology have increased the demand for wireless networks. The IEEE 802.11 standard defines the specifications for Medium Access Control (MAC) and the physical...
Provided by EURASIP
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Whitepapers
Industrial Wireless Sensor Networks: Channel Modeling and Performance Evaluation
Sep 2012
A complete dynamic wideband channel model for industrial wireless sensor network is presented. The model takes into account the noise, interferences, and heavy multipath propagation effects...
Provided by EURASIP
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Whitepapers
The New Normal
Dec 2012
Use of more mobile devices and more mobile applications at work creates an ever-changing set of challenges for wireless network administrators and engineers. A wide variety of laptops, smartphones...
Provided by Aruba Networks
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Whitepapers
Data Traffic Load Balancing and QoS in IEEE 802.11 Network: Experimental Study of the Signal Strength Effect
Dec 2012
Recently there is a growing interest in the internet and multimedia wireless networking where the bandwidth and the Quality of Service (QoS) should be managed with careful. The performances of...
Provided by Nancy Universite
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Whitepapers
Location Information-Assisted Opportunistic Beamforming in LTE System for High-Speed Railway
Jul 2012
Communication systems of high-speed railway have inherent disadvantages and advantages. The estimation error of Direction Of Arrival (DOA) of desired users caused by channel feedback delay and...
Provided by EURASIP
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Whitepapers
Throughput Analysis of Primary and Secondary Networks in a Shared IEEE 802.11 System
Dec 2012
In this paper, the authors analyze the coexistence of a primary and a secondary (cognitive) network when both networks use the IEEE 802.11 based distributed coordination function for medium access...
Provided by Indian Institute of Science
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Whitepapers
Six Time-And Frequency-Selective Empirical Channel Models for Vehicular Wireless LANs
Aug 2007
Three Vehicle-To-Vehicle (VTV) models and three Roadside-To-Vehicle (RTV) models, each suitable for RF channel emulation and based on measurements at 5.9GHz, are presented. Each model captures the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Improved Latency for Time Critical OFDM Based Systems in Vehicular Environment
Aug 2007
Increasing interest in mobile communication systems with high data rates and low-complexity, demands heavily for an extensive research on communication techniques and their optimal implementation....
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Experimental Analysis of Broadcast Reliability in Dense Vehicular Networks
Aug 2007
Dedicated Short Range Communications (DSRC)- based communications enable novel automotive safety applications such as an Extended Electronic Brake Light or Intersection Collision Avoidance. These...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Evaluations of MadWifi MAC Layer Rate Control Mechanisms
Apr 2010
The 802.11 standards specify several transmission rates that can be used at the MAC layer protocol to adapt the transmission rate to channel conditions. Such dynamic adaptations can improve...
Provided by University of Quebec in Outaouais
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Whitepapers
Alcatel-Lucent Light Radio Wi-Fi Solution Turning Wi-Fi Hotspots into a Hot Business Opportunity for Wireless Service Providers
Feb 2012
With maturity in both technology evolution and standards development, Wi-Fi has effectively become "Another wireless technology" which allows extended network coverage and capacity - for both...
Provided by Alcatel-Lucent
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Case Studies
City of Roseville Connects Emergency Response Vehicles
Mar 2009
The City of Roseville relies on its Computer Automated Dispatch (CAD) system as an integral part of its dispatch center. The City of Roseville needed to replace its antiquated, slow county...
Provided by Digi International
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Case Studies
Rabbit RCM5400W Wireless Weighs in With Toledo Do Brasil
Apr 2010
Toledo do Brasil is a leading manufacturer and marketer of precision instruments for use in laboratory, they need to provide data communications for measurement devices in a wide range of...
Provided by Digi International
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Whitepapers
Unsaturated Performance of IEEE 802.11 Broadcast Service in Vehicle-to-Vehicle Networks
Aug 2007
In this paper, the authors propose an analytic model for performance evaluation of IEEE 802.11 ad hoc broadcast networks without the assumption of saturation condition that is not true in safety...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A New Class Partitioned Discrete Model for the Characterization of RTP Multicast Transmission Through IEEE 802.11 Channels
Aug 2007
Multicast of Real Time Protocol (RTP) flows (i.e., multicast video streaming) within 802.11 Wireless Local Area Networks (WLANs) has to deal with the inherent unreliability of wireless channels...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Saturation Performance of IEEE 802.11 Broadcast Scheme in Ad Hoc Wireless LANs
Aug 2007
Broadcast communication is important in inter-vehicle communication. Vehicles broadcast safety related messages to pre-warn the vicinity vehicles. The new IEEE 802.11p is being developed based on...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Increasing VoIP Capacity on WiFi Networks Through the Use of the FAIR Algorithm for MAC
Aug 2007
As WiFi networks and IP telephony grow increasingly popular, the standard Distributed Control Function (DCF) MAC protocol in IEEE 802.11b, which is not designed to support real-time applications,...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
DMABT: A Novel Distributed Medium Access Protocol With Busy Tone
Aug 2007
IEEE 802.11 standard is the most popular Medium Access Control (MAC) protocol in distributed wireless networks. But the throughput of the network is restrained because of collisions and the idle...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Experimental Verification on the Prediction of the Trend in Radio Resource Availability in Cognitive Radio
Aug 2007
This paper presents a prediction of the trend in radio resource availability in cognitive radio. In this paper, cognitive radio is defined as the wireless communication technology in which each...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Impacts of Radio Access Protocols on Cooperative Collision Avoidance in Urban Traffic Intersection Scenarios
Aug 2007
This paper presents a performance comparison between the DSRC-recommended 802.11 Medium Access Control (MAC) and a novel Vehicular Self-Organizing MAC (VeSOMAC) protocol in the context Intelligent...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Throughput Enhancement for IEEE 802.11a Wireless LANs
Aug 2007
Orthogonal Frequency Division Multiplexing (OFDM) in combination with Bit-Interleaved Coded Modulation (BICM) is efficient and robust high-speed transmission technique used in IEEE 802.11a...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Decimation-in-Time FFT Subblocking for Partial Transmit Sequence OFDM
Aug 2007
The authors consider an IFFT-based technique for reducing the Peak-to-Average Power Ratio (PAPR) of an Orthogonal Frequency Division Multiplexing (OFDM) signal. The intermediate signals in a radix...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Developing the Best 2.4 GHz Propagation Model From Active Network Measurements
Aug 2007
As the deployment of outdoor WLAN networks continues to accelerate, it has become clear that network planning is an essential step in the deployment process. This paper outlines a study of the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Interference Analysis of 802.11b and 802.11g Wireless Systems
Aug 2007
The interference characteristics of 802.11b and 802.11g systems are expected to be different due to them using different types of wireless interface. In this paper the performance degradation...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Efficient Preamble Structures for MIMO OFDM-Based WLAN Systems
Aug 2007
In this paper, the authors propose a new preamble structure for channel estimation in a MIMO OFDM-based WLAN system. Both backward compatibility with IEEE 802.11a and low overhead are considered...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
MAC Schemes for Ad-Hoc Wireless Networks
Aug 2007
In this paper, the authors propose a comparison between different MAC protocols for wireless ad-hoc networks. Specifically, they consider a well-known protocol adopted at the MAC layer, that is...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Coexistence of Overlapping BSSs in WLANs
Aug 2007
In this paper, the authors investigate the issue of 20/40 MHz coexistence in next generation Wireless Local Area Networks (WLAN). To that end, they present simulation results of overlapping Basic...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Analysis of Cooperative MAC in IEEE 802.11n for Multiclass Traffic
Aug 2007
An analytical formulation of the saturated throughput of a Cooperative MAC in IEEE 802.11n for multiclass traffic is presented. A helper node is used to relay packets from the source node or...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
WizSync: Exploiting Wi-Fi Infrastructure for Clock Synchronization in Wireless Sensor Networks
Sep 2011
Time synchronization is a fundamental service for Wireless Sensor Networks (WSNs). This paper proposes a novel WSN time synchronization approach by exploiting the existing Wi-Fi infrastructure....
Provided by Michigan State University
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Whitepapers
Optimized FFT and Filter Bank Based Spectrum Sensing for Bluetooth Signal
Mar 2012
Wireless Local Area Networks (WLAN) and Wireless Personal Area Networks (WPAN) such as the Bluetooth are designed to operate in 2.4 GHz ISM band. Since both IEEE 802.15 based Bluetooth and IEEE...
Provided by tampanetmedia.com
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Whitepapers
The Effect of 802.11a on DSRC for ETC Communication
Mar 2012
There are increasing interest recently in using 802.11p for ETC (Electronic Toll Collection) communication. However, there are two potential problems for using 802.11p for mission-critical...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
EasiRA: A Hybrid Rate Adaptation Scheme for 802.11 Mobile Wireless Access Networks
Mar 2012
Rate adaptation, which adapts transmission bit rate according to current wireless link conditions, is a fundamental mechanism used by link-layer protocols to improve the performance of 802.11...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Comparison of Downlink User Multiplexing Schemes in IEEE 802.11ac: Multi-User MIMO Vs. Frame Aggregation
Mar 2012
IEEE 802.11ac standard has newly adopted a DownLink Multi-User Multiple-Input and Multiple-Output (DL-MUMIMO) scheme. For user multiplexing in downlink WLAN, the authors can also use a frame...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Providing Variable TXOP for IEEE 802.11e HCCA Real-Time Networks
Mar 2012
Quality of Service (QoS) provided by the IEEE 802.11e amendment and by the proposed HCF Controlled Channel Access (HCCA) reference scheduler is tailored for Constant Bit Rate traffic streams....
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Enhanced QoS 802.11n Prototype Including a Tournament Contention Function
Mar 2012
A prototype of an enhanced QoS 802.11n circuit using a Tournament Contention Function (TCF) is presented in this paper. First, the TCF developed is briefly explained. Then, a simple hardware...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Prioritized Broadcast Contention Control in VANET
Feb 2010
Reliable and timely multi-hop propagation of messages among vehicles is essential for a safer and greener transportation system. Various broadcast-based forwarding strategies are envisioned for...
Provided by University of Washington
-
White Papers
Modelling Throughput and Starvation in 802.11 Wireless Networks With Multiple Flows
Jul 2009
Carrier Sense Multiple Access (CSMA) protocols require stations that wish to transmit to first check the shared medium for ongoing transmissions. However, in wireless networks stations may not be...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
On Loss Differentiation for CSMA-Based Dense Wireless Network
Nov 2007
In this paper, the authors propose a novel method to differentiate packet loss based on interference energy and timing relative to desired signal in CSMA-based dense wireless networks. All...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
ARA: A Routing and Forwarding Scheme for Coordinated Wide Area Mobility
Apr 2010
The wide availability of Wi-Fi hot-spots provides mobile users with convenient access to the Internet. However, hot-spots cover only small areas and are often operated by a local authority. A user...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Saturation Throughput of IEEE 802.11 DCF in Multi-Hop Ad Hoc Networks
Sep 2008
IEEE 802.11 DCF has been widely used in wireless multi-hop ad hoc networks as the medium access control protocol. However, how well it can perform has not been well studied. In this paper, the...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analysing the Transition Between Unsaturated and Saturated Operating Conditions in 802.11 Network Scenarios
Sep 2008
The aim of this paper is an investigation of 802.11 scenarios, and in particular to evaluate the nature of the transition between unsaturated and saturated operating conditions. Most existing...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Comparative Study of Anonymous 802.11 Protocols
Oct 2008
Many anonymous communication solutions have been proposed to provide anonymous Mobile Ad hoc NETwork (MANET) communications. However, they mainly focus on the routing layer and above to hide the...
Provided by Arizona State University
-
Whitepapers
Evaluating a QoS-Supportive MAC Layer Protocol for WLANs
Sep 2008
In spite of the tremendous boom in the wireless LAN arena, applications such as streaming video and audio still bring unique and challenging Quality of Service (QoS) requirements to such networks....
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Understanding Wi-Fi-Based Connectivity From Moving Vehicles
Aug 2007
Using measurements from VanLAN, a modest-size testbed that the authors have deployed, they analyze the fundamental characteristics of Wi-Fi-based connectivity between base-stations and vehicles in...
Provided by University of Washington
-
White Papers
Trust-Based Fast Authentication for Multiowner Wireless Networks
Feb 2008
In multi-owner wireless networks, Access Points (APs) are owned and operated by different administrations, leading to significant authentication delays during handoff between APs. The authors...
Provided by University of Sydney
-
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
-
White Papers
802.11g Long-Distance Measurements: Antenna Placement and Orientation
Aug 2007
With the increasing popularity of 802.11 wireless technologies, such equipment has recently been used to set up long distance links for wireless mesh networks. To be able to increase the range of...
Provided by University of Massachusetts
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White Papers
Determining 802.11 Link Quality With Passive Measurements
Jul 2008
Unlike a wired link, a wireless link changes according to the physical environment and the network traffic in the surrounding area. The link quality, capacity and reliability are dependent on the...
Provided by University of California, Davis
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White Papers
Metrics for Evaluating Video Streaming Quality in Lossy IEEE 802.11 Wireless Networks
Dec 2009
Peak Signal-to-Noise Ratio (PSNR) is the simplest and the most widely used video quality evaluation methodology. However, traditional PSNR calculations do not take the packet loss into account....
Provided by University of California, Davis
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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
Mobility and QoS of 802.11 and 802.11e Wireless LAN Standards
Oct 2009
Quality of service is a key problem in wireless environments where bandwidth is scarce and channel conditions are time varying and sometimes implies highly packet losses. IEEE 802.11b/g/a wireless...
Provided by Universite Abou Bakr Belkaid Tlemcen
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White Papers
Design and Deployment Considerations for High Performance MIMO Testbeds
Nov 2008
MIMO (Multiple Input Multiple Output) enabled systems are characterized by higher reliability and transmission rates, as compared to conventional SISO (Single Input Single Output) systems....
Provided by University of Thessaly
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White Papers
APHD: End-to-End Delay Assurance in 802.11e Based MANETs
Jan 2011
This paper presents an Adaptive Per Hop Differentiation (APHD) scheme towards achieving end-to-end delay assurance in multihop wireless networks. The APHD scheme extends the capability of IEEE...
Provided by University of California, Davis
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White Papers
Evaluating Adjacent Channel Interference in IEEE 802.11 Networks
Oct 2009
The performance of 802.11-based multi-channel wireless mesh networks is affected by the interference due to neighboring nodes operating on same or adjacent channels. In this paper, the authors...
Provided by University of Queensland
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White Papers
Application of Decoupling 802.11 Mesh Networks From Cache Coherence in Lambda Calculus
May 2009
Recent advances in encrypted configurations and "Fuzzy" modalities are rarely at odds with virtual machines. After years of compelling research into web browsers, the authors disconfirm the...
Provided by Academy Publisher
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White Papers
Modelling Channel Error in IEEE 802.11 Networks
Jul 2010
Modeling the performance of IEEE 802.11 networks has been done since the standard first appeared. Most of the models assume saturated traffic conditions and do not distinguish between traffic...
Provided by University of Cape Town
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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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Whitepapers
Enabling High-Performance for Apple iPads in the Enterprise
Sep 2009
Apple iPad is more than a great way to experience the web, photos and videos. The #1 reason U.S. consumers would use a tablet device such as Apple iPad is working on the go, according to a recent...
Provided by Aruba Networks
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White Papers
A Blueprint for Multimedia-Grade Wi-Fi
Nov 2010
A new age of handheld mobile devices and multimedia applications is driving the need for a new Wi-Fi infrastructure. This emerging demand for mobile multimedia represents a whole new scale for...
Provided by Brandeis University
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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 All-Wireless Workplace Is Now Open for Business: Using 802.11n as Your Primary Network
May 2010
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
Doctors Without Wires: Secure Wi-Fi for Healthcare Applications
Nov 2010
The performance of enterprise wireless LANs (WLANs) over the past few years, and especially since the introduction of 802.11n, has evolved to the point where industry analysts now expect Wi-Fi to...
Provided by Aruba Networks
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White Papers
Background Traffic-Aware Rate Adaptation for IEEE 802.11: Implementation and Test-Bed Experimental Results
Feb 2009
IEEE 802.11-based devices employ rate adaptation algorithms to dynamically switch data rates to accommodate the fluctuating wireless channel conditions. This paper designs and implements a new...
Provided by University Of Florida, Gainesville
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White Papers
OFDM-CPM Performance and FOBP Under IEEE802.16 Scenario
Nov 2009
The future wireless communication networks will provide broadband services such as wireless Internet access to subscribers. Those broadband services require reliable and high-rate communications...
Provided by Iran University of Science and Technology
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White Papers
On the Feasibility of the Link Abstraction in (Rural) Mesh Networks
Jan 2008
Outdoor community mesh networks based on 802.11 have seen tremendous growth in the recent past. The current understanding is that wireless link performance in these settings in inherently...
Provided by University of Wisconsin-Madison
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White Papers
A Measurement Study of a Commercial-Grade Urban WiFi Mesh
Oct 2008
The authors present a measurement study of a large-scale urban WiFi mesh network consisting of more than 250 Mesh Access Points (MAPs), with paying customers that use it for Inter-net access. The...
Provided by Association for Computing Machinery
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White Papers
Scalable WiFi Media Delivery Through Adaptive Broadcasts
Jul 2010
Current WiFi Access Points (APs) choose transmission parameters when emitting wireless packets based solely on channel conditions. In this work the authors explore the benefits of deciding packet...
Provided by University of Wisconsin-Madison
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White Papers
Experimentation and Performance Evaluation of Rate Adaptation Algorithms in Wireless Mesh Networks
Oct 2008
In this paper the authors present an experimental study conducted in 802.11- based mesh networks of three existing rate adaptation algorithms. The aim of this study is twofold. On the one hand,...
Provided by Association for Computing Machinery
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White Papers
Dynamic Resource Modeling for Heterogeneous Wireless Networks
Mar 2009
High variability of access resources in heterogenous wireless networks and limited computing power and battery life of mobile computing devices such as smartphones call for novel approaches to...
Provided by Stanford University
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White Papers
Robust Rate Control for Heterogeneous Network Access in Multi-Homed Environments
Apr 2008
The authors investigate a novel robust flow control framework for heterogeneous network access by devices with multi-homing capabilities. Towards this end, the authors develop an optimal control...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Markov Decision Process based Flow Assignment Framework for Heterogeneous Network Access
May 2009
The authors consider a scenario where devices with multiple networking capabilities access networks with heterogeneous characteristics. In such a setting, the authors address the problem of...
Provided by Bogazici University
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White Papers
A Simulation Study of CSMA/CA Performance in 60 GHz WPANs
Oct 2009
Recently, there has been an increasing interest in developing 60 GHz Wireless Personal Area Networks (WPANs) for short-range high-speed wireless communications. Both industrial and standardization...
Provided by Iowa State University
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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
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
Probabilistic-Based Rate Adaptation for IEEE 802.11 WLANs
Jan 2008
Collision awareness has been recognized as a critical component for effective rate adaptation schemes. Recently, several collision-aware rate adaptation schemes have been proposed for IEEE 802.11...
Provided by Institute of Electrical and Electronics Engineers
