IEEE 802.11h-2003
IEEE 802.11h-2003
Jump to navigation
Jump to search
 | This article needs additional citations for verification. (August 2017) (Learn how and when to remove this template message) |
IEEE 802.11h-2003, or just 802.11h, refers to the amendment added to the IEEE 802.11 standard for Spectrum and Transmit Power Management Extensions. It solves problems like interference with satellites and radar using the same 5 GHz frequency band. It was originally designed to address European regulations but is now applicable in many other countries. The standard provides Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC) to the 802.11a PHY. It has been integrated into the full IEEE 802.11-2007 standard.
IEEE 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, 802.11n and 802.11ac versions to provide wireless connectivity in the home, office, and some commercial establishments.
Contents
1 Motivation
2 Spectrum and Transmit Power Management Extensions
3 See also
4 References
5 External links
Motivation[edit]
Wireless technology has been more and more popular and a lot of standards have been finalized over the past decade. This holds especially for ISM bands (Industrial, Scientific and Medical) which are unlicensed and free to use. The problem, however, is the coexistence between these heterogeneous wireless networks. To address the coexistence
problems in those bands, the IEEE has started the 802.11h Working Group to make
recommendations for better future coexistence. It solves problems like interference
with satellites and radar using the same 5 GHz frequency band.[1]
Spectrum and Transmit Power Management Extensions[edit]
DFS ensures that channels containing radar are avoided by an Access Point (AP) and energy is spread across the band to reduce interference to satellites. TPC ensures that the average power is less than the regulatory maximum to reduce interference to satellites.
The IEEE 802.11h standard provides an additional 11 channels to the 802.11a standard’s 12 non-overlapping channels for a total of 23 non-overlapping channels.[citation needed]
See also[edit]
- Channel allocation schemes
- List of WLAN channels
References[edit]
^ Pollin, Sofie (2011). Software Defined Radios: From Smart(er) to Cognitive. Springer. pp. Chapter 2..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
External links[edit]
- The IEEE 802.11h-2003 Standard
Status of the project 802.11h IEEE Task Group TGh- Quick Guide to IEEE 802.11 WG
See, Michael (2004-07-19). "802.11h helps WLANs share spectrum". Network World. Retrieved 2013-08-20.
Categories:
- Radio resource management
- IEEE 802.11
(window.RLQ=window.RLQ||).push(function(){mw.config.set({"wgPageParseReport":{"limitreport":{"cputime":"0.188","walltime":"0.268","ppvisitednodes":{"value":366,"limit":1000000},"ppgeneratednodes":{"value":0,"limit":1500000},"postexpandincludesize":{"value":34690,"limit":2097152},"templateargumentsize":{"value":481,"limit":2097152},"expansiondepth":{"value":11,"limit":40},"expensivefunctioncount":{"value":2,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":3942,"limit":5000000},"entityaccesscount":{"value":0,"limit":400},"timingprofile":["100.00% 200.988 1 -total"," 35.75% 71.855 1 Template:Cite_book"," 34.02% 68.380 1 Template:Refimprove"," 22.16% 44.532 1 Template:Ambox"," 14.63% 29.411 1 Template:Citation_needed"," 12.93% 25.981 1 Template:Fix"," 10.34% 20.780 1 Template:IEEE_standards"," 9.60% 19.285 2 Template:Navbox"," 6.24% 12.534 1 Template:Delink"," 5.01% 10.078 2 Template:Category_handler"]},"scribunto":{"limitreport-timeusage":{"value":"0.088","limit":"10.000"},"limitreport-memusage":{"value":2715400,"limit":52428800}},"cachereport":{"origin":"mw1222","timestamp":"20181222035031","ttl":1900800,"transientcontent":false}}});mw.config.set({"wgBackendResponseTime":82,"wgHostname":"mw1250"});});
