Technology - Wireless - Broadband 4 - 802-11 & HiperLAN

Synopsis

This report discusses the key technical characteristics of IEEE 802.11 - the most significant medium range wireless technology. The three varieties b and g at 2.45GHz and a at 5GHz are described. The two other medium range technologies - HiperLAN2 and HiSWANa - are also discussed.

Table of Contents

• 1. Synopsis
• 2. IEEE 802.11 - WiFi
  • 2.1 Historical background
  • 2.2 Widespread deployment and future
  • 2.3 Standards and data rates
    • 2.3.1 Data rates compared with switched Ethernet
    • 2.3.2 802.11 1997 2Mb/s 2.4GHz
    • 2.3.3 802.11b 1999 11Mb/s 2.4GHz
    • 2.3.4 802.11a 1999 54Mb/s 5GHz
    • 2.3.5 5GHz frequency allocations
    • 2.3.6 Orthogonal Frequency Division Multiplexing (OFDM)
    • 2.3.7 Multipath propagation
    • 2.3.8 Digital Signal Processing requirements
    • 2.3.9 802.11g 2003 54Mb/s 2.4GHz
• 3. Security
  • 3.1 Introduction
  • 3.2 Wired Equivalent Privacy (WEP)
    • 3.2.1 WPA and 802.11i
• 4. HiperLAN/2 and HiSWANa
• 5. Related reports
  • 5.1 Market reports
  • 5.2 Technology reports
  • Exhibit 1 – IEEE 802.11a 5GHz frequency allocations from WRC03