Wireless Knowedge Base
About the Wireless LAN Consortium
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| Author(s): |
Jeremy Kent |
| Last Updated: |
April 25, 2005 |
| Revision: |
1.0 |
| Abstract: |
Learn about our Wireless LAN Consortium and what testing services we offer. |
| Document: |
 Download MS Powerpoint Document |
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White Papers
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| Author(s): |
Diana Lewis, Justin Rebe, Jeremy deVries |
| Last Updated: |
January 5, 2006 |
| Revision: |
1.0 |
| Abstract: |
The chaotic nature of the radio frequency medium of 802.11 wireless networks makes it problematic to obtain accurate and precise repetition of performance tests and measurements. Environmental variables that deeply influence link performance must be addressed before throughput testing can be accurately measured across various devices. An RF shielded room with anechoic foam provides the most ideal environment for throughput tests compared to either an RF shielded room without foam or an open air laboratory. Location within the RF shielded room with anechoic foam was shown to have a negligible effect on performance, but using an RF absorbing rubber mat under a device was shown to reduce reflections, producing an optimal environment for throughput testing. |
| Document: |
 Download PDF Document |
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| Author(s): |
Richard L. Lynch |
| Last Updated: |
May 11, 2001 |
| Revision: |
1.0 |
| Abstract: |
In the growing world of ubiquitous networking, people often take for granted that interoperability exists between their network devices and the networks they are connecting to. Consortium vendors and international standards bodies are formed to establish standards on how devices should behave if they wish to communicate with each other. However, verifying conformance to these standards is no trivial task. The RSP was developed to add to the Wireless LAN Consortium's testing capabilities. The RSP has the capability of reacting to wireless traffic in a manner that tests a device's handling of uncommon, but very important conditions. The RSP Consists of an 802.11 MAC'less card from Intersil, interfaced to an Altera programmable logic device, which in turn communicates with a PC through a USB microcontroller. |
| Document: |
Download PDF Document |
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| Author(s): |
Wireless, Bridge Functions, and VoX Consortiums |
| Last Updated: |
May 4, 2005 |
| Revision: |
1.0 |
| Abstract: |
Testing scenarios, caveats and issues encountered in testing converged or "triple play" (voice, video, data) services and security in converged enterprise-class deployment scenarios. |
| Document: |
Download PDF Document |
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| Author(s): |
Tom Leary, UNH-IOL; Aruba Networks |
| Last Updated: |
May 13, 2005 |
| Revision: |
1.0 |
| Abstract: |
Wireless technology is becoming increasingly integrated into the world's networks. Recent innovations, such as offloading processing to wireless local area network (WLAN) switches at the network's edge, have cleared the way for large-scale enterprise deployments. However, despite improved maintenance and administration tools, switched WLAN networks are vulnerable to issues arising from the heterogeneous network environment, especially the integration of services such as voice over IP (VoIP).
An open-industry enterprise services and security test event held from March 21 to March 25, 2005 at the University of New Hampshire InterOperability Laboratory (UNH-IOL) provided a backdrop for testing these solutions.
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| Document: |
Download PDF Document |
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Tutorials
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| Author(s): |
Kevin Karcz, Jeremy Kent |
| Last Updated: |
January 2006 |
| Revision: |
3.0 |
| Abstract: |
An overview of various wireless networking technologies, their relationship to one another, and a look at emerging standards. |
| Document: |
Download MS Powerpoint Document |
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| Author(s): |
Jeremy deVries |
| Last Updated: |
September 30, 2005 |
| Revision: |
1.0 |
| Published In: |
Wi-Fi Planet |
| Abstract: |
In today's age of ubiquitous SOHO networks and ever more Wi-Fi in laptops, security is a paramount concern. Unsecured or improperly set up wireless networks can leave you vulnerable to intrusion, viruses, hijacking of bandwidth, and more problems than one can list, which is why properly setting up your secured network using an authentication mechanism such as WPA-PSK is a crucial step in creating a wireless network. This article provides an overview of the Wi-Fi Protected Access Pre-Shared Key (WPA-PSK) security mechanism, and a step-by-step guide to securing your wireless network. |
| Document: |
View (external site) |
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| Author(s): |
Various |
| Last Updated: |
March 1999 |
| Abstract: |
IEEE Working Group for Wireless LAN's has compiled a list of tutorials from 802 Plenary meetings given under the sponsorship of 802.11
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View (external site) |
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| Author(s): |
Chris Polanec |
| Last Updated: |
2003 |
| Abstract: |
Overview of Quality of Service (QoS) Enhancements for the MAC based on TGe draft 6.0. |
| Document: |
Download PDF Document |
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Additional Resources
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| Author(s): |
IEEE LMSC |
| Last Updated: |
2005 |
| Abstract: |
IEEE P802.11 is a standards working group on wireless local area networks. The working group is a part of IEEE LMSC (LAN MAN Standards Committee) formerly called IEEE Project 802. IEEE LMSC reports to the Standards Activity Board (SAB) of the IEEE Computer Society. |
| Document: |
View (external site) |
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| Author(s): |
US Dept. of Commerce |
| Last Updated: |
October 2003 |
| Abstract: |
The United States Commerce Department's National Telecommunications and Information Administration (NTIA) spectrum chart, dated October 2003, depicts the radio frequency spectrum allocations to radio services operated within the United States. |
| Document: |
View (external site) |
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Theses
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| Author(s): |
Sachin Goel |
| Last Updated: |
September 2006 |
| Abstract: |
Transmission Control Protocol (TCP) is a communication protocol that is used to provide reliable data delivery between hosts. As TCP is the most highly used transport-layer protocol, many have worked on addressing the issue of performance. Performance issues have been studied in various environments, especially when using 802.11 Wireless Local Area Networks (WLANs). Wireless networks are prone to a higher number of packets loss and corruption. 802.11 WLANs have an equivalently fast acknowledgement mechanism as TCP to ensure reliability of traffic over it. This duplication of functionality between TCP and 802.11 WLAN creates unexpected behaviors that can result in high costs in terms of overall performance. A significant amount of analytical and simulation work has been done in the past to study the behaviour of TCP over 802.11 WLANs. The main contribution of this work is the analysis of TCP interaction in an 802.11 WLAN topology by using real commercial-grade equipments.
A testing methodology is designed to do the quantitative performance evaluation in a network topology consisted of wired as well as a wireless connection. The
methodology contains test scenarios with different configurable settings on an Access Point (AP) and various controlled impairments in the network topology such as latency, packet drop, noise interference, etc. The performance of TCP is measured in terms of the throughput.
This work provides a comprehensive set of experiments to study the behaviour of TCP over 802.11 WLANs. The results can provide insight into the performance cost associated with TCP traffic on 802.11 WLANs under different network environments and configurations on the AP. The results of this work thus have a value to equipment manufacturers and network operators.
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| Document: |
Download PDF Document |
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| Author(s): |
Shravan Surineni |
| Last Updated: |
December 2004 |
| Abstract: |
The IEEE 802.11 family of wireless LAN protocols defines multiple physical layers implementations of which direct sequence spread spectrum (DSSS, 802.11b) and orthogonal frequency division multiplexing (OFDM, 802.11a/g) are currently the most popular. Market pressures are forcing the convergence of multiple wireless protocols into the same access device, and shortened product design cycles dictate rapid prototyping of new or enhanced protocols. The computationally intensive signal processing algorithms and high data rates associated with these protocols necessitate dedicated hardware implementation of some portions of the signal processing chain, yet allocating separate hardware resources for each of the standards would make the "universal access device" bulky and inefficient. Re-using the same software-reconfigurable hardware to handle different processing algorithms would enable an efficient, flexible alternative to current prototyping and implementation methods. In this thesis, the feasibility of using Software Defined Radio architectures as a prototyping tool for wireless LAN baseband signal processor implementations is explored. Signal processing architectures and algorithms for DSSS and OFDM protocols were developed in the Simulink and Matlab environments, and were then translated to VHDL hardware descriptions. A reference design for a OFDM transmitter was synthesized for implementation on a Xilinx Virtex II FPGA, and functional and timing simulations verified the design correctness. |
| Document: |
Download PDF Document |
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This page was last updated on Thursday, September 28, 2006 at 12:52:34 PM.
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