THOMSON Gateway Configuration Manual page 15

Chapter 1
Introducing Wireless Networking
Standard
802.11g
802.11h
802.11i
802.11j
802.11k
802.11m
802.11n
802.11p
802.11r
802.11s
802.11T
802.11u
802.11v
802.11w
802.11y
i
Not all standards are ratified yet.
ISM band
WLANs operate in the ISM band. The Industrial, Scientific and Medical (ISM) radio bands were originally
reserved internationally for non-commercial use of RF electromagnetic fields for industrial, scientific and
medical purposes.
The ISM bands are defined by the ITU-R in 5.138 and 5.150 of the Radio Regulations. The channels and their
allocations are governed by regulatory bodies and can differ due to variations in national radio regulations.
However, many countries have similar spectrum regulations. The ETSI has the regulatory control over the
wireless spectrum in Europe, the Federal Communications Commission (FCC) in the United States, the
MPHPT in Japan.
Radiocommunication services operating within these bands must accept harmful interference, which may be
caused by these applications.
The different ISM bands are:
>
900 MHz band (902 - 928 MHz)
>
2.4 GHz band (2.4 - 2.5 GHz)
>
5.8 GHz band (5.725 - 5.875 GHz)
>
24 GHz band (24 - 24.25 GHz)
E-DOC-CTC-20060609-0001 v2.0
Description
Further Higher-Speed Physical Layer Extension in the 2.4 GHz Band: 54 Mbps, 2.4 GHz
standard (backwards compatible with b) (2003).
Spectrum and Transmit Power Management Extensions in the 5 GHz band in Europe:
Spectrum Managed 802.11a for European compatibility (2004).
Medium Access Control (MAC) Security Enhancements: enhanced security (2004).
4.9 GHz–5 GHz Operation in Japan: extensions for Japan (2004).
Radio resource measurement enhancements.
Maintenance of the standard.
Higher throughput improvements: aims for a data transmission rate of 540 Mbps.
WAVE - Wireless Access for the Vehicular Environment: to support Intelligent
Transportation Systems (ITS) applications.
Fast BSS transitions.
ESS Mesh Networking.
Wireless Performance Prediction (WPP) - test methods and metrics.
Interworking with non-802 networks (for example cellular).
Wireless network management.
Protected Management Frames.
Contention Based Protocol: defines 3.65 - 3.7 GHz operation in USA.
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