• Wi-Fi Stats and Facts. Source:BoostandCo 2017
  • Wi-Fi Logo. Source:Wi-Fi Logo 2017

Wi-Fi

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Summary

Wi-Fi Stats and Facts. Source:BoostandCo 2017

Wi-Fi is a technology for wireless local area networking with devices based on the IEEE 802.11 standards. Wi-Fi is CSIRO's Wireless Innovation by WLAN Project Team members[Mr Graham Daniels, Dr John O'Sullivan, Dr Terry Percival, Mr Diet Ostry, Mr John Deane]. The network’s central point is the access point, which is a router with transmitting antennas which route the transfer of data and provides Internet access and Internetworking to all devices connected to them, wirelessly.

Wi-Fi networks typically operates in unlicensed 2.4 and 5 GHz radio bands. Data is transferred over radio frequencies, allowing Wi-Fi capable devices to receive and transmit data when they are in range of a Wi-Fi network. Typically, the range of this Wi-Fi access point to any Wi-Fi capable devices is about 300 feet outdoors and 150 feet indoors.

Discussion

  • Role of IEEE and Wi-Fi Alliance in Wi-Fi Technology?

    IEEE 802.11 is the Working Group of Institute of Electrical and Electronics Engineers (IEEE) that deals with Local Area Networks (LANs), and its main role is to develop technical specifications for WLAN implementation.

    The Wi-Fi Alliance is formed to ensure interoperability testing and certification for the rapidly-emerging 802.11 world. This gives consumers the certainty that they don’t need to worry about what company manufactured their devices, as long as they are Wi-Fi certified. It developed Wi-Fi Protected Access (WPA) in response to the compromise of 802.11’s WEP security.

    It acquired Wireless Gigabit Alliance (WiGig) to promote 60 GHz.

  • What is the difference between WiFi and WLAN?

    WLAN(Wireless Local Area Network) is a LAN to while a user (Station) can connect through a wireless connection. However, Wi-Fi is a type of WLAN that adheres to IEEE 802.11x specifications.

  • What are the different existing 802.11x Standards?

    802.11 protocol Frequency(GHz) Bandwidth(MHz) Data Rate(Mbit/s) Description
    802.11a 5 20 54 Uses data link layer protocol and frame format as the original standard, but an OFDM based air interface
    802.11b 2.4 22 11 Uses same media access method defined in the original IEEE standard
    802.11g 2.4 20 54 Uses OFDM based transmission and operates at physical layer
    802.11n 2.4/5 20,40 54 to 600 Provides multiple-input multiple-output antennas
    802.11ac 5 20,40,80,160 up to 433.3 Mbit/s per spatial stream, 1300 Mbit/s total More spatial streams, higher-order modulation and the addition of Multi-user MIMO
    802.11ad 60 2,106 7000 Is an amendment that defines a new physical layer for 802.11 networks to operate in the 60 GHz millimeter wave spectrum

  • What are the upcoming 802.11x protocols?

    802.11 protocol Frequency(GHz) Bandwidth(MHz) Description
    802.11ah 0.9 900 Defines a WLAN system operating at sub-1 GHz license-exempt bands.Due to the favorable propagation characteristics of the low frequency spectra, improved transmission range can be achieved.
    802.11aj 45/60 IEEE 802.11aj is a rebanding of 802.11ad for use in the 45 GHz unlicensed spectrum available in some regions of the world (specifically China)
    802.11ax 2.4/5 Successor to 802.11ac, and will increase the efficiency of WLAN networks. Currently in development, this project has the goal of providing 4x the throughput of 802.11ac
    802.11ay 60 8000 Extension of the existing 11ad, aimed to extend the throughput, range and use-cases

  • What are all the current challenges and Spectrum issues in Wi-Fi?
  • Wi-Fi as a Technology used in IoT
    Wi-Fi Logo. Source:Wi-Fi Logo 2017

    A wide variety of other Wi-Fi developments are currently seeing significant activity across a very broad frontier of applications and markets. There’s significant evidence that Wi-Fi will in fact dominate the IoT market over time. Many Wi-Fi implementations have the power, form factor, component cost, and related physical and electronic characteristics to enable Wi-Fi to find a home in essentially any IoT application, broadband or otherwise.

    And, most importantly, Wi-Fi-based IoT clients can leverage existing and common if not ubiquitous infrastructure, dramatically reducing cost-to-solution. Many IoT applications will likely find a home in the 900-MHz bands that originally hosted early WLANs, and now the domain of 802.11ah.

    Dedicated Short-Range Communications (DSRC), which could become important particularly in vehicular applications like autonomous cars, is covered in 802.11p. Wi-Fi’s role in wireless and mobile applications is second to none, and there is no replacement technology on the horizon.

References

  1. 802.11ax Standard. 2017. "802.11ax Draft Standard" NI Releases Test Software for the Latest IEEE 802.11ax Draft Standard. Accessed 2017
  2. BoostandCo. 2017. "Wi-Fi Stats and Facts" SIX WIFI TRENDS THAT SHOW WHY IT’S THE INTERNET’S GROWTH BUSINESS. June 17. Accessed 2017-06-20
  3. Wi-Fi History. 2017. "Wi-Fi History" CSIRO’s wireless LAN. June 17. Accessed 2017-06-20.

Milestones

1996

CSIRO’s WLAN invention was granted a US patent

1997

IEEE committee created and established 802.11 Standards

Sep
1998

WiFi's First release to customers

1999

WiFi Alliance formed and hold the Wi-Fi Trademark

1999

802.11 a and 802.11b standards got released

2003

802.11g standard got Published

2009

802.11n standard got Published

2013

802.11 ac standard got published

Apr
2017

NI Released 802.11ax draft Standard

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Last update: 2017-06-20 17:46:12 by Anu-S
Creation: 2017-06-18 08:03:05 by Chandana-M-S-google

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Cite As

Devopedia. 2017. "Wi-Fi." Version 12, June 20. Accessed 2017-11-19. https://devopedia.org/wi-fi
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