• This logo represents Wi-Fi signal. Source:Wi-Fi Logo 2017
    This logo represents Wi-Fi signal. Source:Wi-Fi Logo 2017
  • Wi-Fi Ad-Hoc Mode. Source: http://thebestwirelessinternet.com/wlan-formation.html
    Wi-Fi Ad-Hoc Mode. Source:  http://thebestwirelessinternet.com/wlan-formation.html
  • Wi-Fi Infrastructure Mode. Source: http://thebestwirelessinternet.com/wlan-formation.html
    Wi-Fi Infrastructure Mode. Source: http://thebestwirelessinternet.com/wlan-formation.html
  • A selection of top WLAN solution providers. Source: Enterprise Networking 2016.
    A selection of top WLAN solution providers. Source: Enterprise Networking 2016.

Wi-Fi

User avatar
Anu-S
1403 DevCoins
Avatar of user arvindpdmn
arvindpdmn
223 DevCoins
4 authors have contributed to this article
Last updated by arvindpdmn
on 2019-09-23 09:48:15
Created by Chandana-M-S-google
on 2017-06-18 08:03:05
Improve this article. Show messages

Summary

This logo represents Wi-Fi signal. Source:Wi-Fi Logo 2017
This logo represents Wi-Fi signal. Source:Wi-Fi Logo 2017

Wi-Fi is a technology for wireless local area networking with devices based on the IEEE 802.11 standards.User Equipment (laptop/mobile) uses a wireless adapter to translate data into radio signal and transmit that signal using an antenna. Those radio waves emanate outwards from antenna and are received by wireless router. That wireless router then converts radio waves back into data and then sends it to the Internet using a physical connection. Wi-Fi networks either operates in infrastructure mode or Ad-hoc mode.

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.

Milestones

1996

CSIRO's WLAN invention (Wi-Fi) is granted a US patent by outstanding research done by Mr Graham Daniels, Dr John O'Sullivan, Dr Terry Percival, Mr Diet Ostry and Mr John Deane.

1997

IEEE committee is created to establish the 802.11 Standards.

Sep
1998

Wi-Fi's first release to customers.

1999

Wi-Fi Alliance is formed. It holds the Wi-Fi Trademark. 802.11a and 802.11b standards get released.

2003

802.11g standard is published.

2009

802.11n standard is published.

2013

802.11ac standard is published.

Apr
2017

NI releases 802.11ax draft Standard.

Oct
2018

In an effort to simplify naming, Wi-Fi Alliance introduces version numbering. For example, 802.11ax is also known as Wi-Fi 6; 802.11ac as Wi-Fi 5; and 802.11n as Wi-Fi 4.

Discussion

  • What are the roles 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 (WiGig) Alliance to promote 60 GHz.

  • What's 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.

  • Is Wi-Fi a viable technology for IoT applications?

    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.

  • Which are the types of Wi-Fi products available in market?

    Wi-Fi products with a number of features are getting released on a regular basis. Here's a short list of Wi-Fi product types:

    • Wi-Fi Access Point - Used to connect other devices in Wi-Fi Infrastructure mode. All User Equipment will get access to Internet via Access Point.
    • Wi-Fi Analyzer - To Test and diagnose wireless performance issues such as throughput, connectivity, device conflict and single multipath.
    • Wi-Fi Autodoc - AUTOdoc is foremost software to generate a comprehensive report from firewall configuration files.
    • Wi-Fi Adapters - Adapters permit various devices to connect with cableless media to perform various type of external or internal interconnects as PC cards, USB, PCI etc.
    • Wi-Fi Bar Code Scanner - WiFi bar code scanner continues their workflow in retail and intended to read stock keeping unit by providing efficiency and simplicity.
  • Could you explain Ad-Hoc Wi-Fi Mode?
    Wi-Fi Ad-Hoc Mode. Source:  http://thebestwirelessinternet.com/wlan-formation.html
    Wi-Fi Ad-Hoc Mode. Source: http://thebestwirelessinternet.com/wlan-formation.html

    Ad-hoc mode is also known as peer-to-peer mode. Ad-hoc networks don’t require a centralized access point. Instead, devices on the wireless network connect directly to each other. If you set up the two laptops in ad-hoc wireless mode, they’d connect directly to each other without the need for a centralized access point.

    This mode is suitable to temporary network, where the devices are close to each other.

  • Could you explain Infrastructure Wi-Fi Mode?
    Wi-Fi Infrastructure Mode. Source: http://thebestwirelessinternet.com/wlan-formation.html
    Wi-Fi Infrastructure Mode. Source: http://thebestwirelessinternet.com/wlan-formation.html

    In infrastructure mode, Wi-Fi devices on this network communicate through single access point, which is generally called wireless router. For example, two laptops sitting next to each other, each connected to the same wireless network. Even they are close by, they’re not communicating directly. Instead, they’re communicating indirectly through the wireless access point. They send packets to the access point (wireless router) and it sends the packets back to the other laptop. Infrastructure mode requires a central access point that all devices connect to.

    This mode is suitable for any permanent network that's intended to cover a wide area.

  • Could you share a list of top WLAN solution providers?
    A selection of top WLAN solution providers. Source: Enterprise Networking 2016.
    A selection of top WLAN solution providers. Source: Enterprise Networking 2016.

    In 2019, some well-known WLAN solution providers included Aerohive Networks, Mojo Networks, Aruba Networks, Cisco Meraki, Ruckus Wireless, Datto Networking, Ubiquiti Networks, Mist Systems, Purple, Edgecore Networks, Cloud4Wi, and Eleven. The best of them provide cloud management, including the use of ML/AI.

    A report from IDC showed that in Q1-2019, about 47% of the enterprise market is with Cisco. This is followed by Aruba, Ubiquiti and Ruckus.

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. Enterprise Networking. 2016. "Top 10 WLAN solution providers." Enterprise Networking. Accessed 2018-03-09.
  3. FreeWiMaxInfo. 2017. "Wi-Fi Products Types." FreeWimaxInfo. Accessed 2018-03-08.
  4. Hoffman, Chris. 2016. "Infrastructure and Ad-Hoc Wi-Fi Modes." HowToGeek. Accessed 2018-03-08.
  5. IDC. 2019. "Worldwide Enterprise WLAN Market Continues Moderate Growth in the First Quarter of 2019, According to IDC." IDC, May 30. Accessed 2019-09-23.
  6. McClelland, Calum. 2017. "8 Things You Didn’t Know About WiFi." Medium, June. Accessed 2018-03-08
  7. Nagata, Yasuyoshi and Takefumi and Yasushi. 2017. "Wireless Local Area Network Standardization of IEEE 802.11 and the Wi-Fi Alliance." NTT Technical Review. Accessed 2017-06-20.
  8. Parmenter, Tessa. 2009. "Wireless vs. Wi-Fi: What is the difference between Wi-Fi and WLAN?" TechTarget, September 10. Accessed 2019-09-23.
  9. Wi-Fi Alliance. 2018. "Wi-Fi Alliance® introduces Wi-Fi 6." October 03. Accessed 2019-03-14.
  10. Wi-Fi History. 2017. "Wi-Fi History." CSIROpedia, CSIRO’s Wireless LAN, June 17. Accessed 2017-06-20.

Milestones

1996

CSIRO's WLAN invention (Wi-Fi) is granted a US patent by outstanding research done by Mr Graham Daniels, Dr John O'Sullivan, Dr Terry Percival, Mr Diet Ostry and Mr John Deane.

1997

IEEE committee is created to establish the 802.11 Standards.

Sep
1998

Wi-Fi's first release to customers.

1999

Wi-Fi Alliance is formed. It holds the Wi-Fi Trademark. 802.11a and 802.11b standards get released.

2003

802.11g standard is published.

2009

802.11n standard is published.

2013

802.11ac standard is published.

Apr
2017

NI releases 802.11ax draft Standard.

Oct
2018

In an effort to simplify naming, Wi-Fi Alliance introduces version numbering. For example, 802.11ax is also known as Wi-Fi 6; 802.11ac as Wi-Fi 5; and 802.11n as Wi-Fi 4.

Tags

See Also

Further Reading

  1. Mathias, Craig. 2017. "The future of Wi-Fi: The best is yet to come" Network World. April 24. Accessed 2018-03-08.
  2. Gold, Jon. 2017. "Wi-Fi 2018: What does the future look like?" Network World. November 29. Accessed 2018-03-08.
  3. Stretch, Jeremy. 2009. "IEEE 802.11 Wireless cheat sheet." PacketLife.net, January 03. Accessed 2019-09-23.

Article Stats

Author-wise Stats for Article Edits

Author
No. of Edits
No. of Chats
DevCoins
11
0
1403
2
3
223
3
0
74
1220
Words
3
Chats
29
Edits
3
Likes
1814
Hits

Cite As

Devopedia. 2019. "Wi-Fi." Version 29, September 23. Accessed 2019-11-13. https://devopedia.org/wi-fi