Wireless Local Area Networks

M. S. Obaidat, Monmouth University

G. I. Papadimitriou, Aristotle University, Greece

S. Obeidat, Arizona State University

Introduction

Overview

Applications of WLANs

Chapter Organization

802.11 MAC

Possible Topologies

Access Modes: DCF

Access Modes: PCF

802.11 Physical Layer

Concepts

Radio Link

Physical-Layer Standards

HIPERLANS

HIPERLAN Type 1

HIPERLAN Type 2

WLAN Security

Encryption in 802.11

Authentication in 802.11

Vulnerabilities

QOS Support: IEEE 802.11e

Challenges in Providing QoS Support over Wireless

QoS Mechanisms

Advanced Topics

Bluetooth

Voice over 802.11

Glossary

Cross References

References

INTRODUCTION

Overview

In the past few years, we have seen wireless technology permeate every aspect of our lives. The fob on your key-chain (to open the car remotely), wireless mice and keyboards, and personal digital assistants (PDAs) that synchronize with your workstation are just a few examples. This proliferation of wireless devices was the result of the Federal Communications Commission (FCC) decision to open the ISM (industrial, scientific, and medical) band to the public. Wireless local area networks (WLANs) were among the domains that benefited from this release. This release from licensing motivated many companies and research laboratories to develop and implement wireless LAN solutions.

This disorganized and parallel effort resulted in the emergence of proprietary solutions that do not interoperate with each other. Lack of interoperability ...

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