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Wireless Datacommunication

802.11™ and Bluetooth™

Wireless datacommunication is dominated by two protocols, IEEE 802.11 and Bluetooth. There are IEEE 802.15 tascforce groups for Bluetooth standardisation considerations.



  802.11b 802.11a 802.11g
( starting 2003 )
Bluetooth
Low Power 
Bluetooth
 High Power
Distance 150 m 30 m ? 140 m 10 m 100 m
Theoretical Transfer rate 11 Mbit/s ; 3 channels
3 channels -> 33 Mbit/s
54 Mbit/s ; 8 channels
8 channels -> 432 Mbit/s
54 Mbit/s 1 Mbit/s  
Practical Transfer rate     25-30 Mbit/s 720 kbit/s  
Frequence 2.4 GHz 5 GHz 2.4 GHz 2.4 GHz 2.4 GHz
Radiated Power (eerp) 50 ... 100 mw     1 mw 100 mw
Communication Multiple clients per access point Multiple clients per access point Multiple clients per access point Point-to-Piont
Point-to-Multipoint
Point-to-Piont
Point-to-Multipoint
Voice VoIP (Voice over IP) VoIP (Voice over IP)   3 x 64 kbit/s channels  
Users       8 users  
Security (embedded) 801.11 WEP Protocol
authentication, encryption
 ?   mode 2 (service level enforcement sec.)
mode 3 (link-level enforced sec.)
authentication, authorization, encryption
 
mw = milliwatt

There are two Communication Modes:






IEEE Standardisation for wireless. There are three wireless standards conserning wireless communication:

WLAN™   ( Wireless LAN )
WPAN™   ( Wireless PAN ( Personal Area Networks) ), Draft (07/2000)
WMAN™  ( Wireless MAN )

802.11 WLAN
  • 802.11b-cor, Corrigendum of 802.11b's MIB
  • 802.11d, Update of Regulatory Domains
  • 802.11e, MAC Enhancements.
  • 802.11f, IAPP Inter Access Point Protocol.
  • Regulatory activities Study Group, Higher Rate Extension to 802.11b
  • Marketing Ad Hoc Group
802.15 WPAN™
  • 802.15.1: Bluetooth™ derivative in WG Draft Ballot
  • 802.15.2: Coexistence MAC & PHY Modeling
  • 802.15.3: WPAN-HR Final Call For Proposal
  • Marketing Committee
802.16 Broadband Wireless Access Standards

  • 802.16.1: Air Interface for 10-66 GHz
  • 802.16.2: Coexistence of Broadband Wireless Access Systems
  • 802.16.3: Air Interface for Licensed Frequencies, 2-11 GHz
  • WirelessHUMAN™ Study Group: License-Exempt Bands, with a focus on 5-6 GHz



tac@datko.com
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