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Home > Communications > Access Technology > LAN/WAN Technology
The Basics of 802.11 Wireless LANs
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| Published Date:
August 2005
Published By:
IEC
Page Count:
174
Order Code:
R329-81
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Table of Contents
Chapter 1: A Hollywood Story
Chapter 2: The Frequency Spectrum and the Secure Placement of Calls
Radio Frequency Transmission
The Electromagnetic Frequency Spectrum
The Unlicensed Portion of the Frequency Spectrum
Usage of the Licensed Portion of the Frequency Band for Cellular Communications
Back to Hedy Lamarr's "Spreading of the Signal" Technique
Chapter 3: Basic Modulation Schemes
Modulation
Types of Modulation
Steps in Converting from an Analog Source to Digital Data
Transmitting Voice over Telephone Wires
Chapter 4: Advanced Modulation and Encoding Schemes
Modulation Basics
Amplitude Modulation
Frequency Modulation
Orthogonal Frequency Division Multiplexing
Phase Modulation
Phase Shift Keying
Pulse Amplitude Modulation
Pulse Code Modulation
Digital Modulation Techniques
Basic Encoding Techniques for Digital Data to Analog Signal
Amplitude Shift Keying
Frequency Shift Keying: Frequency Difference near Carrier Frequency
Phase Shift Keying: Phase of Carrier Signal Shifted
Binary Phase Shift Keying
Differential Phase Shift Keying
Quadrature Phase Shift Keying
Quadrature Amplitude Modulation: QAM = ASK + PSK
Chapter 5: Spreading the Signal across the Frequencies
Frequency Hopping Spread Spectrum
Direct Sequence Spread Spectrum
Complementary Code Keying
Chapter 6: The IEEE 802.11 Wireless LAN Standard
The 802.11 Architecture
802.11 Media Access Control
The Media Access Control and Logical Link Control Protocols
Collision Avoidance Approach
Timing and Power
Beaconing
The Basic Operation of 802.11 Networks with Control Frames
Packet Acknowledgment
Reliable Delivery: Two-Way
Four-Way Reliability
Media Access Methods for Control of Access to the Network
The Distributed Access and Avoidance Method
The Distributed Coordination Function
The Point (Centralized) Control Function and the Short IFS
The 802.11 Frame Format
The IEEE 802.11 Standard Physical Media
Chapter 7: IEEE 802.11a, 802.11b, and 802.11g WLANs
The 802.11b Version of the IEEE 802.11 Wireless Network Standard
The 802.11a Version of IEEE 802.11 Wireless Networking
Orthogonal Frequency Division Multiplexing Scheme
Eight Non-Overlapping 20-MHz Channels
Forward Error Correction
Multi-Path Reflection
Data Rates and Ranges
The MAC Layer — 802.11a
The Four-Way Reliability Method Employed by 802.11a
Compatibility and Incompatibility Features of 802.11a with 802.11b
Transfer Rates and Distances of the Versions of 802.11
IEEE 802.11 g
Comparing 802.11a, 802.11b, and 802.11g Technologies
A Comparison of the Transmission Distances for 802.11 a, b, and g
Chapter 8: 802.11 Wireless LAN Designs
Access Points
Channels
RF Site Survey
Site Channel Mapping
Site Bandwidth Layout
Example Designs for Specific Building Spaces
Chapter 9: Wireless Metropolitan-Area Networks
Unwired City Projects
Chapter 10: Security for 802.11 Wireless LANs
Insertion Attacks
Jamming
Wireless Sniffing
Encryption and Cryptography
Wired Equivalent Privacy
WEP Authentication
WEP's Shortcomings
802.11i
TKIP
CCMP
802.1x and Extensible Authentication Protocol
RADIUS Technology
Wi-Fi Protected Access: The Transition from WEP to 802.11i
Chapter 11: Future Trends in Wireless LANs
Even Faster Wireless LANs: 802.11n
Portable Devices
VoWi-Fi
Chapter 12: Conclusion
Appendix: Wireless Access Point and Router Vendors and Products
3Com
ActionTec Electronics
Adtran Technology Co. Ltd.
Alvarion, Inc.
AmbiCom, Inc.
Anycom, Inc.
APC (American Power Conversion)
Apple Computer, Inc.
Asanté Technologies Inc.
ASUSTek Computer Inc.
Avaya Inc.
Belkin Components
Buffalo Technology (USA), Inc.
Cisco Systems, Inc.
CNet Technology, Inc.
Compex, Inc.
CyberXLink
D-Link Systems, Inc.
Dell Computer Corp.
Digi International
Edimax Technology Co., Ltd.
Efficient Networks, Inc.
Enterasys Networks, Inc.
Extreme Networks, Inc.
Hawking Technologies
Hewlett-Packard
IBM Corp.
Intermec
IOGear
Linksys Inc.
Microsoft Corp.
MicroSolutions, Inc.
Motorola Corp.
NetGear, Inc.
Netopia Inc.
Nomadix
Nortel Networks
Proxim Corp.
SanDisk Corp.
SMC Networks
Socket Communications
SonicWALL, Inc.
Sony Electronics, Inc.
StarTech Computer Products
Symbol Technologies Toshiba
TRENDware
Troy Group, Inc.
U.S. Robotics
Zonet
Zyxel Communications, Inc.
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