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802.11 Wireless Standards - CompTIA Network+ N10-006 - 5.3
802.11 Wireless Standards - CompTIA Network+ N10-006 - 5.3
Published: 2015/05/14
Channel: Professor Messer
CSE 574-14-06A: Wireless LANs Part II: IEEE 802.11a/b/g/n/ac (Part 1 of 2)
CSE 574-14-06A: Wireless LANs Part II: IEEE 802.11a/b/g/n/ac (Part 1 of 2)
Published: 2014/06/05
Channel: Raj Jain
[Hindi/Urdu] WiFi Explained in Detail | Wifi 802.11 a, b, g, n, ac
[Hindi/Urdu] WiFi Explained in Detail | Wifi 802.11 a, b, g, n, ac
Published: 2016/01/04
Channel: Technical Guruji
wireless lans 802.11a,b,g,n
wireless lans 802.11a,b,g,n
Published: 2017/07/28
Channel: tech dude
CSE574-16-06C: Wireless LANs Part II: 802.11a/b/g/n/ac (Part 3 of 3)
CSE574-16-06C: Wireless LANs Part II: 802.11a/b/g/n/ac (Part 3 of 3)
Published: 2016/10/04
Channel: Raj Jain
EDiMAX Wireless 802.11b/g/n Nano USB Adapter : Eye-On-Stuff
EDiMAX Wireless 802.11b/g/n Nano USB Adapter : Eye-On-Stuff
Published: 2015/03/10
Channel: Eye-On-Stuff
Simple WiFi N700 USB Adapter 802.11b/g/n Box Opening
Simple WiFi N700 USB Adapter 802.11b/g/n Box Opening
Published: 2013/11/25
Channel: SimpleWiFi
SPEEDTEST LINKSYS AE3000 DUAL-BAND  VS.  LB-LINK ADAPTER 802.11 B/G/N  WIFI 300Mbps
SPEEDTEST LINKSYS AE3000 DUAL-BAND VS. LB-LINK ADAPTER 802.11 B/G/N WIFI 300Mbps
Published: 2013/11/10
Channel: ComplaintDepartment
CSE574-16-06A: Wireless LANs Part II: 802.11a/b/g/n/ac (Part 1 of 3)
CSE574-16-06A: Wireless LANs Part II: 802.11a/b/g/n/ac (Part 1 of 3)
Published: 2016/10/04
Channel: Raj Jain
802.11 b/ g/ n 300Mbps USB Wireless WiFi Adapter
802.11 b/ g/ n 300Mbps USB Wireless WiFi Adapter
Published: 2013/06/06
Channel: ZbIZaD
CSE 574-14-06B: Wireless LANs Part II: IEEE 802.11a/b/g/n/ac (Part 2 of 2)
CSE 574-14-06B: Wireless LANs Part II: IEEE 802.11a/b/g/n/ac (Part 2 of 2)
Published: 2014/06/05
Channel: Raj Jain
Wifi Samsat 150Mbps IEEE 802.11b/G/N ( USB WiFi Wireless Network )
Wifi Samsat 150Mbps IEEE 802.11b/G/N ( USB WiFi Wireless Network )
Published: 2015/06/11
Channel: Flash-Sat
WiFi Adapter IEEE 802.11 b/ g/ n 150Mbps USB 2.0 CNP-66084
WiFi Adapter IEEE 802.11 b/ g/ n 150Mbps USB 2.0 CNP-66084
Published: 2013/01/22
Channel: Olaf666
802.11 b/g/n_Roaming
802.11 b/g/n_Roaming
Published: 2012/03/28
Channel: Rohit Sijoria
The sound of 802.11b
The sound of 802.11b
Published: 2012/08/01
Channel: invalidsyscall
CSE574-16-06B: Wireless LANs Part II: 802.11a/b/g/n/ac (Part 2 of 3)
CSE574-16-06B: Wireless LANs Part II: 802.11a/b/g/n/ac (Part 2 of 3)
Published: 2016/10/04
Channel: Raj Jain
2.4GHz to 2.5GHz, 802.11b/g/n WiFi Front End Module  |
2.4GHz to 2.5GHz, 802.11b/g/n WiFi Front End Module |
Published: 2012/10/01
Channel: RFMDMedia
IEEE 802.11n-2009
IEEE 802.11n-2009
Published: 2014/08/13
Channel: Audiopedia
IEEE 802.11 b/ g/ n 150Mbps USB Wireless WiFi Adapter
IEEE 802.11 b/ g/ n 150Mbps USB Wireless WiFi Adapter
Published: 2013/07/30
Channel: yura mersoff
H2K2 (2002): Fun With 802.11b
H2K2 (2002): Fun With 802.11b
Published: 2012/09/12
Channel: Channel2600
Meeka was dreaming about 802.11b connections.
Meeka was dreaming about 802.11b connections.
Published: 2015/05/20
Channel: CopperWiFi.com
4 1 The Evolution of 802 11 and 802 11b   CCNA Wireless 200 355
4 1 The Evolution of 802 11 and 802 11b CCNA Wireless 200 355
Published: 2017/10/11
Channel: Wireless Videos Cisco
Wi-Fi Receiver 300Mbps, 2.4GHz, 802.11b/g/n USB 2.0 Wireless Mini Wi-Fi
Wi-Fi Receiver 300Mbps, 2.4GHz, 802.11b/g/n USB 2.0 Wireless Mini Wi-Fi
Published: 2017/03/14
Channel: Technical Hubbb
Can a 802.11 b connect to 5ghz
Can a 802.11 b connect to 5ghz
Published: 2018/05/13
Channel: channel 1
ebay sales video, item #3  Micronet SP906GK 802.11 B/G wireless card
ebay sales video, item #3 Micronet SP906GK 802.11 B/G wireless card
Published: 2010/05/20
Channel: viperfrank
Wi-Fi | Курс "Компьютерные сети"
Wi-Fi | Курс "Компьютерные сети"
Published: 2016/10/30
Channel: Andrey Sozykin
High Power 802.11b/g WiFi USB Adapter
High Power 802.11b/g WiFi USB Adapter
Published: 2010/07/21
Channel: Michael Vinogradov
Terabyte 802 Wi-Fi Receiver 500Mbps 2.4Ghz  802.11B/G/N 2.0 Wireless Wi-Fi Network USB  AdapterBlack
Terabyte 802 Wi-Fi Receiver 500Mbps 2.4Ghz 802.11B/G/N 2.0 Wireless Wi-Fi Network USB AdapterBlack
Published: 2018/02/20
Channel: Subrata Das
802.11b Rocket Cam
802.11b Rocket Cam
Published: 2007/03/20
Channel: minervaII
Is WiFi G Faster than B in Windows Mobile?
Is WiFi G Faster than B in Windows Mobile?
Published: 2007/11/30
Channel: Pocketnow
AirLive WN-300R Wireless 802.11b/g/n Broadband Router
AirLive WN-300R Wireless 802.11b/g/n Broadband Router
Published: 2009/09/10
Channel: WebAntics.com Shopping Store
Zonet ZSR4154WS IEEE 802.11b/g/n Wireless Broadband Router  - $22
Zonet ZSR4154WS IEEE 802.11b/g/n Wireless Broadband Router - $22
Published: 2012/08/24
Channel: DealsOnRouters
Inventek Systems 802.11 b/g/n Serial to Wi-Fi & AT Command Set Tutorial
Inventek Systems 802.11 b/g/n Serial to Wi-Fi & AT Command Set Tutorial
Published: 2012/01/13
Channel: InventekSystems
2017 04 26 15 03 Inventek Wireless Modules 2
2017 04 26 15 03 Inventek Wireless Modules 2
Published: 2017/04/27
Channel: Mike Biggs
What is the frequency and maximum data rate for 802.11 b
What is the frequency and maximum data rate for 802.11 b
Published: 2018/05/13
Channel: Arif Hidayat
Wasp Tech Ubiquiti Unifi Wireless Access Point 802.11b/g/n
Wasp Tech Ubiquiti Unifi Wireless Access Point 802.11b/g/n
Published: 2016/07/12
Channel: Ashley Derrick
DRM software and Denkovi Wi-Fi 802.11 b/g Eight Channel Relay Board
DRM software and Denkovi Wi-Fi 802.11 b/g Eight Channel Relay Board
Published: 2011/09/13
Channel: Denkovi A E
AWUS036NHR Alfa 802.11b/g/n WiFi Long Range USB Adapter
AWUS036NHR Alfa 802.11b/g/n WiFi Long Range USB Adapter
Published: 2013/11/26
Channel: SimpleWiFi
Netgear Nighthawk X4s D7800100pes Ac2600 Wlan Vdsl2/adsl2+ Modemrouter
Netgear Nighthawk X4s D7800100pes Ac2600 Wlan Vdsl2/adsl2+ Modemrouter
Published: 2016/07/16
Channel: Antwan Theriault
Three-Node Visual Demo
Three-Node Visual Demo
Published: 2016/03/08
Channel: 80211b SDR
Wireless USB Adapter for PC 802.11b/g/n 2.1GHz Review Installation, GO wireless
Wireless USB Adapter for PC 802.11b/g/n 2.1GHz Review Installation, GO wireless
Published: 2017/06/28
Channel: Techno Iliyas
►VAR uploads: [Advanced ]learn about a,b,g,n and ac types of networks
►VAR uploads: [Advanced ]learn about a,b,g,n and ac types of networks
Published: 2016/09/07
Channel: VAR t3ch
EDMT 627 - Routers
EDMT 627 - Routers
Published: 2010/02/15
Channel: djreeves21
WPGA: GainSpan GS2000 Ultra Low-Power 802.11b/g/n + 802.15.4 Single Chip
WPGA: GainSpan GS2000 Ultra Low-Power 802.11b/g/n + 802.15.4 Single Chip
Published: 2014/05/12
Channel: WPG Americas
KINGMAX 2.4GHz 802.11 b/g/n 150Mbps WiFi Wireless Network  - DealExtreme
KINGMAX 2.4GHz 802.11 b/g/n 150Mbps WiFi Wireless Network - DealExtreme
Published: 2012/02/28
Channel: DealeXtreme DV
AWUS036NHA Alfa 802.11b/g/n USB Adapter Box Opening
AWUS036NHA Alfa 802.11b/g/n USB Adapter Box Opening
Published: 2013/11/26
Channel: SimpleWiFi
http://www.dealextreme.com0WG 1000mW 54Mbps 802.11b/g USB 2.0 WLAN WiFi Wireless
http://www.dealextreme.com0WG 1000mW 54Mbps 802.11b/g USB 2.0 WLAN WiFi Wireless
Published: 2012/05/02
Channel: wwwww452
High Power 2 Antenna WIFI USB Wireless Adapter
High Power 2 Antenna WIFI USB Wireless Adapter
Published: 2018/02/04
Channel: Veslinov Predrag
Commercial Grade 2.4GHz Outdoor Wi-Fi Antenna Panel Patch 14.3dBi Directional 802.11b/g
Commercial Grade 2.4GHz Outdoor Wi-Fi Antenna Panel Patch 14.3dBi Directional 802.11b/g
Published: 2012/01/24
Channel: SimpleWiFi
Realtek RTL8187B 802.11b/g Mini PCIe Wireless Cards
Realtek RTL8187B 802.11b/g Mini PCIe Wireless Cards
Published: 2012/10/26
Channel: AustinCyberShop
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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IEEE 802.11b-1999 or 802.11b, is an amendment to the IEEE 802.11 wireless networking specification that extends throughput up to 11 Mbit/s using the same 2.4GHz band. A related amendment was incorporated into the 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, 802.11n and 802.11ac versions to provide wireless connectivity in the home, office and some commercial establishments.

Description[edit]

802.11b has a maximum raw data rate of 11 Mbit/s and uses the same CSMA/CA media access method defined in the original standard. Due to the CSMA/CA protocol overhead, in practice the maximum 802.11b throughput that an application can achieve is about 5.9 Mbit/s using TCP and 7.1 Mbit/s using UDP.

802.11b products appeared on the market in mid-1999, since 802.11b is a direct extension of the DSSS (Direct-sequence spread spectrum) modulation technique defined in the original standard. The Apple iBook was the first mainstream computer sold with optional 802.11b networking. Technically, the 802.11b standard uses complementary code keying (CCK) as its modulation technique. The dramatic increase in throughput of 802.11b (compared to the original standard) along with simultaneous substantial price reductions led to the rapid acceptance of 802.11b as the definitive wireless LAN technology.

802.11b devices suffer interference from other products operating in the 2.4 GHz band. Devices operating in the 2.4 GHz range include: microwave ovens, Bluetooth devices, baby monitors and cordless telephones. Interference issues and user density problems within the 2.4 GHz band have become a major concern and frustration for users.

Range[edit]

802.11b is used in a point-to-multipoint configuration, wherein an access point communicates via an omnidirectional antenna with mobile clients within the range of the access point. Typical range depends on the radio frequency environment, output power and sensitivity of the receiver. Allowable bandwidth is shared across clients in discrete channels. A directional antenna focuses output power into a smaller field which increases point-to-point range. Designers of such installations who wish to remain within the law must however be careful about legal limitations on effective radiated power.[1]

Some 802.11b cards operate at 11 Mbit/s, but scale back to 5.5, then to 2, then to 1 Mbit/s (also known as Adaptive Rate Selection) in order to decrease the rate of re-broadcasts that result from errors.

Channels and Frequencies[edit]

802.11b/g channels in 2.4 GHz band
802.11b channel to frequency map [2]
Channel  Center Frequency  Frequency delta Channel Width Overlaps Channels
1 2.412 GHz 5 MHz 2.401–2.423 GHz 2-5
2 2.417 GHz 5 MHz 2.406–2.428 GHz 1,3-6
3 2.422 GHz 5 MHz 2.411–2.433 GHz 1-2,4-7
4 2.427 GHz 5 MHz 2.416–2.438 GHz 1-3,5-8
5 2.432 GHz 5 MHz 2.421–2.443 GHz 1-4,6-9
6 2.437 GHz 5 MHz 2.426–2.448 GHz 2-5,7-10
7 2.442 GHz 5 MHz 2.431–2.453 GHz 3-6,8-11
8 2.447 GHz 5 MHz 2.436–2.458 GHz 4-7,9-12
9 2.452 GHz 5 MHz 2.441–2.463 GHz 5-8,10-13
10 2.457 GHz 5 MHz 2.446–2.468 GHz 6-9,11-13
11 2.462 GHz 5 MHz 2.451–2.473 GHz 7-10,12-13
12 2.467 GHz 5 MHz 2.456–2.478 GHz 8-11,13-14
13 2.472 GHz 5 MHz 2.461–2.483 GHz 9-12, 14
14 2.484 GHz 12 MHz 2.473–2.495 GHz 12-13
Note: Channel 14 is only allowed in Japan, Channels 12 & 13 are allowed in most parts of the world. More information can be found in the List of WLAN channels.

See also[edit]

References[edit]

  1. ^ "Code of Federal Regulations, Title 47-Telecommunications, Chapter I-Federal Communications Commission, Part 15-Radio Frequency Devices, Section 15.247" (PDF). 2006-10-01. Archived (PDF) from the original on 2012-09-07. Retrieved 2013-06-10. 
  2. ^ http://download.wcvirtual.com/reference/802%20Channel%20Freq%20Mappings.pdf[permanent dead link]
  3. ^ "Official IEEE 802.11 working group project timelines". January 26, 2017. Retrieved 2017-02-12. 
  4. ^ "Wi-Fi CERTIFIED n: Longer-Range, Faster-Throughput, Multimedia-Grade Wi-Fi® Networks" (registration required). Wi-Fi Alliance. September 2009. 
  5. ^ "802.11n Delivers Better Range". Wi-Fi Planet. 2007-05-31. 
  6. ^ "IEEE 802.11ac: What Does it Mean for Test?" (PDF). LitePoint. October 2013. 
  7. ^ Lee, Wookbong; Kwak, Jin-Sam; Kafle, Padam; Tingleff, Jens; Yucek, Tevfik; Porat, Ron; Erceg, Vinko; Lan, Zhou; Harada, Hiroshi (2012-07-10). "TGaf PHY proposal". IEEE P802.11. Retrieved 2013-12-29. 
  8. ^ "802.11ad - WLAN at 60 GHz: A Technology Introduction" (PDF). Rohde & Schwarz GmbH. November 21, 2013. p. 14. 
  9. ^ 802.11ad Antenna Differences: Beamsteering, Gain and Range
  10. ^ Sun, Weiping; Choi, Munhwan; Choi, Sunghyun (July 2013). "IEEE 802.11ah: A Long Range 802.11 WLAN at Sub 1 GHz" (PDF). Journal of ICT Standardization. 1 (1): 83–108. doi:10.13052/jicts2245-800X.125. 
  11. ^ Sun, Rob; Xin, Yan; Aboul-Maged, Osama; Calcev, George; Wang, Lei; Au, Edward; Cariou, Laurent; Cordeiro, Carlos; Abu-Surra, Shadi; Chang, Sanghyun; Taori, Rakesh; Kim, TaeYoung; Oh, Jongho; Cho, JanGyu; Motozuka, Hiroyuki; Wee, Gaius. "P802.11 Wireless LANs". IEEE. pp. 2,3. Archived from the original on 2017-12-06. Retrieved December 6, 2017. 

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