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wi-fi (802.11)
(2384 results)-
White Papers
Scaling Properties of IEEE 802.11 Wireless Networks
Feb 2008
The IEEE 802.11 MAC protocol has gained widespread popularity and has been adopted as the de-facto layer 2 protocols for Wireless Local Area Networks (WLANs). Because of its popularity, there has...
Provided by University of Southern California
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White Papers
SpiderRadio: An Incumbent Sensing Implementation for Cognitive Radio Networking Using IEEE 802.11 Devices
Apr 2010
Spectrum sensing is one of the critical features in cognitive radio based dynamic spectrum access networking. This paper discusses a new spectrum sensing technique for primary incumbent detection....
Provided by Stevens Institute of Technology
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White Papers
Detecting Selfish Exploitation of Carrier Sensing in 802.11 Networks
May 2009
Recently, tuning the Clear Channel Assessment (CCA) threshold in conjunction with power control has been considered for improving the performance of Wireless LANs. However, CCA tuning can be...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Cooperative Load Balancing in IEEE 802.11 Networks With Cell Breathing
Jan 2008
IEEE 802.11 WLANs (Wi-Fi) are widely deployed for providing Internet access in public spaces, known as Hot Spots. In these scenarios, users tend to be "Gregarious" and essentially static. Since...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Demystifying 802.11n Power Consumption
Sep 2010
This paper report what the authors believe to be the first measurements of the power consumption of an 802.11n NIC across a broad set of operating states (Channel width; transmit power, rates,...
Provided by University of Washington
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White Papers
Rogue Access Point Detection Using Innate Characteristics of the 802.11 MAC
Jul 2009
Attacks on wireless networks can be classified into two categories: external wireless and internal wired. In external wireless attacks, an attacker uses a wireless device to target the Access...
Provided by Georgia State University
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White Papers
Maranello: Practical Partial Packet Recovery for 802.11
Mar 2010
Partial packet recovery protocols attempt to repair corrupted packets instead of retransmitting them in their entirety. Recent approaches have used physical layer confidence estimates or...
Provided by University of Maryland
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White Papers
Distributed Delay Estimation and Call Admission Control in IEEE 802.11 WLANs
Dec 2007
Voice over WiFi (VoWiFi) will soon be the main alternative to cellular phones. Providing a satisfactory user experience remains difficult, however. This paper focuses on Call Admission Control...
Provided by Columbia University
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White Papers
A Lightweight Solution for Defending Against Deauthentication/disassociation Attacks on 802.11 Networks
Mar 2008
This paper investigates a special type of Denial of Service (DoS) attack on 802.11-based networks, namely deauthentication/disassociation attack. In the current IEEE 802.11 standards, whenever a...
Provided by University of Texas at Dallas
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White Papers
Collision-Aware Design of Rate Adaptation for Multi-Rate 802.11 WLANs
Jun 2008
One of the key challenges in designing a rate adaptation scheme for IEEE 802.11 Wireless LANs (WLANs) is to differentiate bit errors from link-layer collisions. Many recent rate adaptation schemes...
Provided by Seoul National University
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White Papers
Predictable 802.11 Packet Delivery From Wireless Channel Measurements
Sep 2010
RSSI is known to be a fickle indicator of whether a wireless link will work, for many reasons. This greatly complicates operation because it requires testing and adaptation to find the best rate,...
Provided by Association for Computing Machinery
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White Papers
Analysis of an IEEE 802.11 Network Activity During a Small Workshop
Apr 2010
Understanding current performance and usage of IEEE 802.11 networks is valuable for effectively managing and deploying wireless networks in the future. This paper analyzes a wireless trace from...
Provided by Worcester Polytechnic Institute
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White Papers
NashWifi: Coordinated Management of Heterogenous Home 802.11 Networks Using Bargaining
Jan 2010
This paper presents an economically principled framework for coordinated configurations of heterogeneous wireless networks. The approach, called NashWiFi, is based on the concept of Nash...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Beacon Frame Spoofing Attack Detection in IEEE 802.11 Networks
Jan 2008
A great variety of well-known attacks exist for the IEEE 802.11 protocol. The lack of mechanisms for management frame authentication and the complexity of the protocol itself have derived into a...
Provided by Mondragon Unibertsitatea
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White Papers
Experimental Characterization of Sectorized Antennas in Dense 802.11 Wireless Mesh Networks
May 2009
Sectorized antennas can increase wireless network capacity through greater spatial reuse. Despite their increasing popularity, their real-world performance characteristics in dense wireless mesh...
Provided by Association for Computing Machinery
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White Papers
Experimental Validation of Analytical Performance Models for IEEE 802.11 Networks
Jan 2010
The authors consider the simplest IEEE 802.11 WLAN networks for which analytical models are available and seek to provide an experimental validation of these models. The experiments include the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Channel Switching Overhead for 802.11b
Dec 2009
IEEE 802.11b devices operate in the 2.4 GHz ISM band the United States. Because of this, 802.11b devices are susceptible to interference from a multitude of sources such as microwave ovens and...
Provided by Southern Illinois University
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White Papers
Inferring and Mitigating a Link's Hindering Transmissions in Managed 802.11 Wireless Networks
Sep 2010
In 802.11 managed wireless networks, the manager can address under-served links by rate-limiting the conflicting nodes. In order to determine to what extent each conflicting node is responsible...
Provided by Association for Computing Machinery
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White Papers
Measurement-Driven Guidelines for 802.11 WLAN Design
Jan 2010
Dense deployments of WLANs suffer from increased interference and, as a result, reduced capacity. There are three main functions used to improve the overall network capacity: intelligent frequency...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
On Security Vulnerabilities of Null Data Frames in IEEE 802.11 Based WLANs
Mar 2008
Null data frames are a special but important type of frames in IEEE 802.11 based Wireless Local Area Networks (E.g., 802.11 WLANs). They are widely used for power management, channel scanning and...
Provided by City University of Hong Kong
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White Papers
Symphony: Synchronous Two-Phase Rate and Power Control in 802.11 WLANs
Jun 2008
Adaptive transmit power control in 802.11 Wireless LANs (WLANs) on a per-link basis helps increase network capacity and improves battery life of Wi-Fi enabled mobile devices. However, it faces the...
Provided by Association for Computing Machinery
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White Papers
Opportunistic Use of Client Repeaters to Improve Performance of WLANs
Dec 2008
Currently deployed IEEE 802.11WLANs (Wi-Fi Networks) share Access Point (AP) bandwidth on a per-packet basis. However, the various stations communicating with the AP often have different signal...
Provided by Association for Computing Machinery
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White Papers
Lossless Handover With N-Casting Between WiFi-WiMAX on OpenRoads
Sep 2009
The authors envisioned a future mobile wireless Internet with many radios, and many networks (in POMI). By that, they mean many radios will be found in a future mobile device. It is now common for...
Provided by Stanford University
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White Papers
Integration Gain of Heterogeneous WiFi/WiMAX Networks
Dec 2008
The authors study the integrated WiFi/WiMAX networks where users are equipped with dual-radio interfaces that can connect to either a WiFi or a WiMAX network. Previous research on integrated...
Provided by University of California, Davis
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White Papers
Channel Management in Collocated WiFi-WiMAX Networks
Dec 2009
In order to ensure fair access and efficiency of bandwidth usage in wireless integrated networks, resource allocation algorithms should be well designed. In this paper, the authors briefly discuss...
Provided by Auburn University
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White Papers
Comparative Throughput of WiFi & Ethernet LANs Using OPNET MODELER
Oct 2010
The comparison between the performance of both wired and wireless networks is based on various performance parameters. The performance of the wired Ethernet is very sensitive to the number of...
Provided by RIMT - Maharaja Aggrasen Engineering College
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White Papers
Analyzing 802.11n Performance Gains
Sep 2009
This paper examines the peak performance of an 802.11n system with respect to the achievable throughput and the authors decompose the gains observed due to the various PHY/MAC layer features...
Provided by University of Illinois at Urbana Champaign
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White Papers
Diagnosing Wireless Packet Losses in 802.11: Separating Collision From Weak Signal
Jul 2007
It is well known that a packet loss in 802.11 can happen either due to collision or an insufficiently strong signal. However, discerning the exact cause of a packet loss, once it occurs, is known...
Provided by University of Wisconsin-Madison
-
White Papers
Multimedia Capacity Analysis of the IEEE 802.11e Contention-Based Infrastructure Basic Service Set
Jul 2008
This paper proposes a novel and simple multimedia capacity analysis framework for the IEEE 802.11e Enhanced Distributed Channel Access (EDCA) function. The authors calculate an accurate station-...
Provided by University of California, Irvine
-
White Papers
Micro Power Management of Active 802.11 Interfaces
Jun 2008
Wireless interfaces are major power consumers on mobile systems. Considerable research has improved the energy efficiency of elongated idle periods or created more elongated idle periods in...
Provided by Association for Computing Machinery
-
White Papers
ZipTx: Harnessing Partial Packets in 802.11 Networks
Sep 2008
Current wireless protocols retransmit packets that fail the checksum test, even when most of the bits are correctly received. Prior work has recognized this inefficiency; however, the proposed...
Provided by Association for Computing Machinery
-
White Papers
Adaptive Carrier-Sensing for Throughput Improvement in IEEE 802.11 Networks
Mar 2010
As a Carrier Sense Multiple Access (CSMA) network, the performance of IEEE 802.11 networks highly depends on the accuracy of the carrier sensing procedure. However, conventional carrier sensing...
Provided by University of California, Berkeley
-
White Papers
Measurement-Based Approaches for Accurate Simulation of 802.11-Based Wireless Networks
Oct 2008
This paper addresses the issue of unrealistic simulations of wireless networks using a measurement-based approach. The idea is to use empirical modeling using measurement data as a mechanism to...
Provided by Association for Computing Machinery
-
White Papers
Turning Hidden Nodes Into Helper Nodes in IEEE 802.11 Wireless LAN Networks
May 2008
To enhance the performance of IEEE 802.11 WLANs in the presence of hidden terminal problem, the authors proposes a protocol that allows non-hidden stations to help each other retransmit faster...
Provided by IFIP
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White Papers
Analysis of the 802.11e Enhanced Distributed Channel Access Function
Mar 2008
This paper proposes an analytical model for the performance analysis of the Enhanced Distributed Channel Access (EDCA) function of the IEEE 802.11e standard. The proposed Discrete-Time Markov...
Provided by University of California, Irvine
-
White Papers
Picking Pockets on the Lawn: The Development of Tactics and Strategies in a Mobile Game
Nov 2010
This paper presents Treasure, an outdoor mobile multiplayer game inspired by Weiser's notion of seams, gaps and breaks in different media. Playing Treasure involves movement in and out of a wi-fi...
Provided by University of Glasgow
-
White Papers
SAM: Enabling Practical Spatial Multiple Access in Wireless LAN
Sep 2009
Spatial multiple access holds the promise to boost the capacity of wireless networks when an access point has multiple antennas. Due to the asynchronous and uncontrolled nature of wireless LANs,...
Provided by Association for Computing Machinery
-
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
-
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
-
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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Whitepapers
A Neural Network Based Cognitive Engine for IEEE 802.11 WLAN Access Point Selection
Apr 2012
Now-a-days IEEE 802.11 WLANs are widely deployed; in spite of this, the issue of designing an efficient and practical access point selection schemes that can provide the best throughput...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
WiMAX or Wi-Fi: The Best Suited Candidate Technology for Building Wireless Access Infrastructure
Jul 2007
With the help of many expert communication engineers IEEE has developed various wireless standards in a hierarchical fashion. Some of the deployed wireless standards are: 802.15 (Bluetooth),...
Provided by KTH
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Whitepapers
Joint Rate Adaptation and Medium Access in Wireless LANs: A Non-Cooperative Game Theoretic Perspective
Jul 2012
Wireless Local Area Networks (WLANs) based on IEEE 802.11 standards are becoming ubiquitous today and typically support multiple data rates. In such multi-rate WLANs, distributed medium access and...
Provided by University of Paris 13
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Whitepapers
White Spaces and Mobile Communications
Feb 2011
To support the continuing growth of data traffic on mobile networks and offset the increasing strain all this traffic is placing on those networks, the U.S. Federal Communications Commission (FCC)...
Provided by Alcatel-Lucent
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Whitepapers
WiFi and WiMAX Secure Deployments
Dec 2009
Wireless Broadband offers incredibly fast, "Always on" Internet similar to ADSL and sets the user free from the fixed access areas. In order to achieve these features standardisation was achieved...
Provided by Hindawi Publishing
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Whitepapers
A Novel Prioritization Scheme to Improve QoS in IEEE 802.11e Networks
Mar 2010
IEEE 802.11 WLAN utilizes a distributed function at its MAC layer, namely, DCF to access the wireless medium. Due to its distributed nature, DCF is able to guarantee working stability in a...
Provided by Hindawi Publishing
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Whitepapers
An Accurate Analytical Model for 802.11e EDCA Under Different Traffic Conditions with Contention-Free Bursting
Mar 2011
Extensive research addressing IEEE 802.11e Enhanced Distributed Channel Access (EDCA) performance analysis, by means of analytical models, exists in the literature. Unfortunately, the currently...
Provided by Hindawi Publishing
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Whitepapers
Performance Analysis of Ubiquitous Wireless Connectivity in a 3G/IEEE 802.11 Integrated Network
Dec 2012
UMTS networks promise to offer always on, ubiquitous connectivity with relatively low data rates for moderate to high mobility users in macro cell environments. On the other hand, IEEE 802.11...
Provided by International Journal of Computer Applications
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Whitepapers
On Probability of Link Availability in Original and Modified AODV, FSR and OLSR Using 802.11 and 802.11p
Dec 2012
Mobile Ad-hoc NETworks (MANETs) comprise on wireless mobile nodes that are communicating with each other without any infrastructure. Vehicular Ad-hoc NETwork (VANET) is a special type of MANETs in...
Provided by Dalhousie University
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Whitepapers
Dynamic Resource Management in 802.11 Wireless Mesh Networks
Jun 2012
The association/handoff procedures are important components in a balanced operation of 802.11-based wireless mesh networks. In this paper, the authors introduce the concept of cooperative...
Provided by Hindawi Publishing
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Whitepapers
Performance Analysis of the IEEE 802.11s PSM
Oct 2012
With the introduction of IEEE 802.11 Power Save Mode (PSM), a lot of work has been done to enhance the energy saving ability of the wireless nodes. The ultimate goal of the research is to make the...
Provided by Hindawi Publishing
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Whitepapers
Alcatel-Lucent Lightradio Wi-Fi Solution
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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Whitepapers
Design and Implementation of Distributed Resource Management Mechanisms for Wireless Mesh Networks
Jun 2012
The wireless mesh networks are usually consisted of a static wireless backbone. The main wireless mesh routers serve the routing of the traffic, while the peripheral routers act as Access Points...
Provided by University of the Witwatersrand
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Whitepapers
Design and Characterization of a Full-Duplex Multi-Antenna System for WiFi Networks
Oct 2012
In this paper, the authors present an experimental and simulation based study to evaluate the use of full-duplex as a mode in practical IEEE 802.11 networks. To enable the study, they designed a...
Provided by Rice Software Consulting
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Whitepapers
Turning Small Cells into Big Profits
Oct 2012
With small cells that leverage both cellular and Wi-Fi technologies, Mobile Network Operators (MNOs) can deliver focused capacity and coverage, offload data from macro networks, and offer...
Provided by Alcatel-Lucent
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Whitepapers
Wireless LAN Reliability in the Unwired Enterprise
Feb 2012
The unwired enterprise has long been a goal in most organizations, and the advent of 802.11n now makes achieving that goal a practical reality. 802.11n and the proliferation of mobile devices are...
Provided by Juniper Networks
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Whitepapers
Optimize the Cisco Unified Wireless Network to Support Wi-Fi Enabled Phones and Tablets
Apr 2011
Cloud computing has been on the horizon of most CIOs for the better part of half a decade. Cloud computing represents the next evolutionary step for computing. Decades ago, the mainframe era...
Provided by Cisco
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Whitepapers
Comparison Routing Protocols and Mobility Models for Vehicular Ad-Hoc Networks Using Real Maps
Dec 2012
The mobile Ad-Hoc networks, specifically VANETs (Vehicular Ad-Hoc NETworks), are studied since the last 10 years. The present paper highlights comparisons between the routing protocols: AODV, DSDV...
Provided by International Journal of Computer Applications
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Whitepapers
Two-Hop Relay-Based Vehicular Network in WiMAX
Sep 2012
In mobile communication, routing data through intermediate mobile node is a challenging task due to high mobility of nodes which causes rapid change in network topology and frequent disconnection...
Provided by International Journal of Computer Applications
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Whitepapers
WINNER Model for Subway Tunnel at 5.8 GHz
Oct 2012
Modern subways operation relies on wireless systems based on IEEE802.11x modems deployed inside tunnels. Constraints on robustness and needs for high data rates led to the use of MIMO techniques....
Provided by Universite Libre de Bruxelles
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Whitepapers
Integrating Power Line and Wireless for Intelligent and Opportunistic Networking
Aug 2010
In this paper, the authors try to present a network architecture which leverages the power line for Opportunistic networking. They try to provide the autonomous working by use of 802.11 wireless...
Provided by International Journal of Computer Applications
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Whitepapers
Optimizing Delivery Mechanisms in Wireless Mesh Network with QOS Constraints
Aug 2010
In this paper, the authors have considered a Wireless Mesh Network (WMN) with multiple Internet GateWays (IGW) and wired network support for maximizing the delivery in the WMN access network. They...
Provided by International Journal of Computer Applications
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Whitepapers
Schools Graduate to Enterprise-Class Wi-Fi
Sep 2011
Online multimedia and interactive educational applications are invading the classroom and prompting schools to take a fresh look at what's possible with the latest in Wireless LAN (WLAN)...
Provided by Aerohive Networks
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Whitepapers
Optimizing Network and Client Performance Through Dynamic Airtime Scheduling
Aug 2011
In wireless LANs one thing is certain, wireless performance is often not as advertised. Wireless is a shared medium, meaning that all clients and neighboring APs compete for the same limited...
Provided by Aerohive Networks
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Whitepapers
A Practical Approach to Wireless 2.0
Aug 2011
Wi-Fi networks offer secure mobility and a tremendous ROI. In the early days of Wi-Fi, significant challenges included management, security, mobility, deployment, reliability, and radio resource...
Provided by Aerohive Networks
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Whitepapers
The Case for Next-Generation Wireless LANs: Faster Connections and More Applications and Users
Nov 2010
Once regarded as optional technology, wireless networks are creating efficiencies and reducing costs not only in corporate enterprises, but also in a wide array of industries, such as healthcare,...
Provided by Brocade Communications Systems, Inc.
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Whitepapers
Radios, Antennas and Other Wi-Fi Essentials
Jul 2011
Wi-Fi (802.11) is an access technology that connects IP devices to a wired network using wireless radios. The client devices have radios (wireless adapters) that connect to Access Point (AP)...
Provided by Ruckus Network
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Whitepapers
Characterizing Wireless Network Performance
Mar 2010
As expensive and inconvenient as wires may be, when it comes to transmitting data, they are generally quite reliable. Once working, they tend to stay working, offering the same steady performance...
Provided by Ruckus Network
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Whitepapers
Compelling Economics for Wi-Fi Broadband Access
Dec 2009
802.11n-based Wireless Broadband Access (WBA) is the new Metro Wi-Fi. Only this time, the business drives the network build out, not the other way around. Early metro Wi-Fi networks suffered from...
Provided by Ruckus Network
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Whitepapers
Clear Voice Over Wi-Fi in the Enterprise
Apr 2010
Wireless LANs (WLANs) are becoming pervasive in the enterprise. Businesses are turning to WLANs to give employees immediate access to business applications and communication tools. By adding voice...
Provided by Ruckus Network
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Whitepapers
Using All the Tools You Can
May 2012
User demands on Wi-Fi networks continue to rise quickly across every segment of the industry, and as a direct result, great radio performance matters more than ever. Achieving that high...
Provided by Ruckus Network
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Whitepapers
802.11ac: Very High Throughput
Nov 2012
Also known as Very High Throughput (VHT), 802.11ac is currently an IEEE draft amendment that set out to break the 1 Gbps barrier, to improve Wi-Fi's spectral efficiency, and to expand on the...
Provided by Ruckus Network
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Whitepapers
The Evolution of Controller-Based Wireless LANs
Apr 2011
This paper revisits the benefits of centralized 802.11n wireless LAN networks and describes the case for transforming the controller-based architecture to match market needs. Centralization of...
Provided by Cisco
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Whitepapers
Secure Wi-Fi For Healthcare Applications
Jun 2012
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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Whitepapers
Adaptive Parameters of an Enhanced Backoff Method by Using an Artificial Neural Network Between Mobiles in an Industrial Domain
Nov 2012
This paper is to discuss the exchanges between mobiles moving in an industrial environment. A simulation approach has been chosen in order reach this study. This novel method aimed to minimize the...
Provided by Lebanese University
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Whitepapers
Theoretical Analysis of Saturation Throughput in MU-DCF
Jun 2009
In this paper, the calculation of saturation throughput for previously proposed Multi-User - Distributed Coordination Function (MU-DCF) is presented. MU-DCF is an IEEE 802.11 based protocol that...
Provided by RWSoftware
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Whitepapers
IEEE 802.11s - Mesh Deterministic Access
May 2008
In 2003, interests in the Institute of Electrical and Electronics Engineers (IEEE) 802.11 Working Group (WG) led to formation of Task Group (TG) "S". 802.11s develops an amendment for Wireless...
Provided by RWSoftware
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Whitepapers
An IEEE 802.11 Model for the Planning of Wireless Mesh Networks
Jun 2009
Service-area specific optimization is a necessity for large-scale wireless networks. For this task, a model to estimate the quality of a radio network configuration is required. In the case of...
Provided by RWSoftware
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Whitepapers
IEEE 802.11s: The WLAN Mesh Standard
Feb 2010
The wireless local area network standard IEEE 802.11 is the preferred solution for low-cost data services. Key to its success are the 2.4 and 5 GHz unlicensed bands. The transmit power limitations...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Home Agent Placement and Assignment in WLAN with Cellular Networks
Oct 2011
Wireless Local Area Networks (WLANs) are providing the most economical means of internet access. However, their access is very much limited. They can be deployed in a large scale by integrating...
Provided by International Journal of Computer Applications
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White Papers
Analyzing 802.11n Performance Gains
Sep 2009
This paper examines the peak performance of an 802.11n system with respect to the achievable throughput and the authors decompose the gains observed due to the various PHY/MAC layer features...
Provided by University of Illinois at Urbana Champaign
-
White Papers
Diagnosing Wireless Packet Losses in 802.11: Separating Collision From Weak Signal
Jul 2007
It is well known that a packet loss in 802.11 can happen either due to collision or an insufficiently strong signal. However, discerning the exact cause of a packet loss, once it occurs, is known...
Provided by University of Wisconsin-Madison
-
White Papers
Multimedia Capacity Analysis of the IEEE 802.11e Contention-Based Infrastructure Basic Service Set
Jul 2008
This paper proposes a novel and simple multimedia capacity analysis framework for the IEEE 802.11e Enhanced Distributed Channel Access (EDCA) function. The authors calculate an accurate station-...
Provided by University of California, Irvine
-
White Papers
Micro Power Management of Active 802.11 Interfaces
Jun 2008
Wireless interfaces are major power consumers on mobile systems. Considerable research has improved the energy efficiency of elongated idle periods or created more elongated idle periods in...
Provided by Association for Computing Machinery
-
White Papers
ZipTx: Harnessing Partial Packets in 802.11 Networks
Sep 2008
Current wireless protocols retransmit packets that fail the checksum test, even when most of the bits are correctly received. Prior work has recognized this inefficiency; however, the proposed...
Provided by Association for Computing Machinery
-
White Papers
Adaptive Carrier-Sensing for Throughput Improvement in IEEE 802.11 Networks
Mar 2010
As a Carrier Sense Multiple Access (CSMA) network, the performance of IEEE 802.11 networks highly depends on the accuracy of the carrier sensing procedure. However, conventional carrier sensing...
Provided by University of California, Berkeley
-
White Papers
Measurement-Based Approaches for Accurate Simulation of 802.11-Based Wireless Networks
Oct 2008
This paper addresses the issue of unrealistic simulations of wireless networks using a measurement-based approach. The idea is to use empirical modeling using measurement data as a mechanism to...
Provided by Association for Computing Machinery
-
White Papers
Turning Hidden Nodes Into Helper Nodes in IEEE 802.11 Wireless LAN Networks
May 2008
To enhance the performance of IEEE 802.11 WLANs in the presence of hidden terminal problem, the authors proposes a protocol that allows non-hidden stations to help each other retransmit faster...
Provided by IFIP
-
White Papers
Analysis of the 802.11e Enhanced Distributed Channel Access Function
Mar 2008
This paper proposes an analytical model for the performance analysis of the Enhanced Distributed Channel Access (EDCA) function of the IEEE 802.11e standard. The proposed Discrete-Time Markov...
Provided by University of California, Irvine
-
White Papers
Picking Pockets on the Lawn: The Development of Tactics and Strategies in a Mobile Game
Nov 2010
This paper presents Treasure, an outdoor mobile multiplayer game inspired by Weiser's notion of seams, gaps and breaks in different media. Playing Treasure involves movement in and out of a wi-fi...
Provided by University of Glasgow
-
White Papers
SAM: Enabling Practical Spatial Multiple Access in Wireless LAN
Sep 2009
Spatial multiple access holds the promise to boost the capacity of wireless networks when an access point has multiple antennas. Due to the asynchronous and uncontrolled nature of wireless LANs,...
Provided by Association for Computing Machinery
-
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
-
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
-
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
-
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
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
