World Library  
Flag as Inappropriate
Email this Article

IEEE 802.11j-2004

Article Id: WHEBN0002807117
Reproduction Date:

Title: IEEE 802.11j-2004  
Author: World Heritage Encyclopedia
Language: English
Subject: IEEE 802.11, IEEE 802.15, Service Interoperability in Ethernet Passive Optical Networks, IEEE 1667, IEEE 802.11ai
Collection: Ieee 802.11
Publisher: World Heritage Encyclopedia
Publication
Date:
 

IEEE 802.11j-2004

802.11j-2004 or 802.11j is an amendment to the IEEE 802.11 standard designed specially for Japanese market. It allows Wireless LAN operation in the 4.9 to 5 GHz band to conform to the Japanese rules for radio operation for indoor, outdoor and mobile applications. The amendment has been incorporated into the published IEEE 802.11-2007 standard.

802.11 is a set of IEEE standards that govern wireless networking transmission methods. They are commonly used today in their 802.11a, 802.11b, 802.11g and 802.11n versions to provide wireless connectivity in the home, office and some commercial establishments.

Contents

  • 4.9 - 5 GHz operation in Japan 1
  • Public safety 2
  • See also 3
  • External links 4

4.9 - 5 GHz operation in Japan

The 802.11j standard "Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: 4.9 to 5 GHz Operation in Japan" is designed specially for Japanese market. Finalized in 2004, the standard works in the 4.9 GHz to 5 GHz band to conform to the Japanese rules for radio operation for indoor, outdoor and mobile applications.

802.11j defines uniform methods that let APs move to new frequencies or change channel width for better performance or capacity -- for example, to avoid interference with other wireless applications.

Public safety

In the USA, the 4.9 GHz band is reserved for use by public safety wireless applications. The transmission mask is narrower for the public safety band than for consumer part 15 applications. Thus one cannot simply operate 802.11j equipment in the public safety band and be FCC compliant. Public safety agencies are working with manufacturers and the FCC in order to leverage Commercial Off The Shelf (COTS) equipment. There are public safety groups working closely with the manufacturing community, federal interests, and standards bodies to create an 802.11 series standard for public safety.[1]

See also

External links

  • The 802.11j-2004 standard
  • Status of Project IEEE 802.11j IEEE Task Group TGj
  • 802.11 Standard Modified For Japan Information Week November 29, 2004
  • Wi-Fi extensions should breathe new life into 802.11a Wireless Watch The Guardian December 13, 2004
  • Wi-Fi Goes International Ed Sutherland Wi-Fi Planet December 6, 2004
  • 4.9GHz Cisco wireless aids police Enterprise Networks and Servers August 2005
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.