WiFi definition - Revision history

Designing Buildings at 07:23, 9 November 2020

2020-11-09T07:23:07Z

← Older revision		Revision as of 07:23, 9 November 2020
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	* [82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.		* [82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.

−	[[Category:~~Definitions~~]] [[Category:~~DCN_Definition~~]] [[Category:~~Products_/_components~~]] [[Category:~~DCN_Product_Knowledge~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Products_/_components]]

Editor at 13:39, 22 June 2020

2020-06-22T13:39:34Z

← Older revision		Revision as of 13:39, 22 June 2020
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	* Information and communications technology.		* Information and communications technology.
	* Internet of things.		* Internet of things.
		+	* Internet of things in commercial buildings.
	* Local area network.		* Local area network.
	* Smart buildings.		* Smart buildings.
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	* [82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.		* [82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.

−	[[Category:Definitions]] [[Category:Products_/_components]]	+	[[Category:Definitions]] [[Category:DCN_Definition]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 07:26, 17 November 2019

2019-11-17T07:26:50Z

← Older revision		Revision as of 07:26, 17 November 2019
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	* [82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.		* [82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.

−	[[Category:Products_/_components]]	+	[[Category:Definitions]] [[Category:Products_/_components]]

Editor at 15:06, 16 November 2016

2016-11-16T15:06:56Z

← Older revision		Revision as of 15:06, 16 November 2016
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−	WiFi technology (IEEE802.11) can be broadly categorised to IEEE802.11 a/b/g/n/ac. Each is an improvement in transmission speed and/or signal range from the previous, although these days only ‘G’ and ‘N’ are used. The standard G versions of networking devices have an optimal transmission speed of 54 Mbps with an indoor range of approximately 40 m whereas the N versions have a theoretical maximum speed of 300 Mbps (practical of approximately 150 Mbps and above) with an indoor range in the region of 70 m. In addition to this N variations offer the choice of two frequency ranges; 2.4 GHz or 5 GHz. The higher frequency has no impact on the range but offers a potentially less polluted frequency to help reduce crosstalk noise.	+	WiFi technology (IEEE802.11) can be broadly categorised to IEEE802.11 a/b/g/n/ac. Each is an improvement in transmission speed and/or signal range from the previous, although these days only ‘G’ and ‘N’ are used.

−	Both the G and the N devices utilise the same channel capabilities but these vary regionally. In Europe (including UK) a channel system of 1-13 is used whereas in the US the system uses 1-11. Both use the same frequency ranges resulting in an approximate frequency void of 16.5 MHz at the end of the 2.4 GHz range. Japan utilise a different system still, expanding the 2.4 GHz range beyond the acceptable ISM guidelines by 10.5 MHz to allow for an additional 14th channel with 11 MHz of non-interference from other channels (see Figure below) [80], [81], [82].	+	The standard G versions of networking devices have an optimal transmission speed of 54 Mbps with an indoor range of approximately 40 m whereas the N versions have a theoretical maximum speed of 300 Mbps (practical of approximately 150 Mbps and above) with an indoor range in the region of 70 m.
		+
		+	In addition to this, N variations offer the choice of two frequency ranges; 2.4 GHz or 5 GHz. The higher frequency has no impact on the range but offers a potentially less polluted frequency to help reduce crosstalk noise.
		+
		+	Both the G and the N devices utilise the same channel capabilities but these vary regionally. In Europe (including UK) a channel system of 1-13 is used whereas in the US the system uses 1-11. Both use the same frequency ranges resulting in an approximate frequency void of 16.5 MHz at the end of the 2.4 GHz range.
		+
		+	Japan utilise a different system still, expanding the 2.4 GHz range beyond the acceptable ISM guidelines by 10.5 MHz to allow for an additional 14th channel with 11 MHz of non-interference from other channels (see Figure below) [80], [81], [82].

	[[File:WiFi.jpg\|link=File:WiFi.jpg]]		[[File:WiFi.jpg\|link=File:WiFi.jpg]]
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	* The future of electricity in domestic buildings.		* The future of electricity in domestic buildings.
	* WiMax.		* WiMax.
		+	* WiredScore.
	* ZigBee.		* ZigBee.

Designing Buildings at 12:23, 1 July 2016

2016-07-01T12:23:21Z

← Older revision		Revision as of 12:23, 1 July 2016
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−
	WiFi technology (IEEE802.11) can be broadly categorised to IEEE802.11 a/b/g/n/ac. Each is an improvement in transmission speed and/or signal range from the previous, although these days only ‘G’ and ‘N’ are used. The standard G versions of networking devices have an optimal transmission speed of 54 Mbps with an indoor range of approximately 40 m whereas the N versions have a theoretical maximum speed of 300 Mbps (practical of approximately 150 Mbps and above) with an indoor range in the region of 70 m. In addition to this N variations offer the choice of two frequency ranges; 2.4 GHz or 5 GHz. The higher frequency has no impact on the range but offers a potentially less polluted frequency to help reduce crosstalk noise.		WiFi technology (IEEE802.11) can be broadly categorised to IEEE802.11 a/b/g/n/ac. Each is an improvement in transmission speed and/or signal range from the previous, although these days only ‘G’ and ‘N’ are used. The standard G versions of networking devices have an optimal transmission speed of 54 Mbps with an indoor range of approximately 40 m whereas the N versions have a theoretical maximum speed of 300 Mbps (practical of approximately 150 Mbps and above) with an indoor range in the region of 70 m. In addition to this N variations offer the choice of two frequency ranges; 2.4 GHz or 5 GHz. The higher frequency has no impact on the range but offers a potentially less polluted frequency to help reduce crosstalk noise.

	Both the G and the N devices utilise the same channel capabilities but these vary regionally. In Europe (including UK) a channel system of 1-13 is used whereas in the US the system uses 1-11. Both use the same frequency ranges resulting in an approximate frequency void of 16.5 MHz at the end of the 2.4 GHz range. Japan utilise a different system still, expanding the 2.4 GHz range beyond the acceptable ISM guidelines by 10.5 MHz to allow for an additional 14th channel with 11 MHz of non-interference from other channels (see Figure below) [80], [81], [82].		Both the G and the N devices utilise the same channel capabilities but these vary regionally. In Europe (including UK) a channel system of 1-13 is used whereas in the US the system uses 1-11. Both use the same frequency ranges resulting in an approximate frequency void of 16.5 MHz at the end of the 2.4 GHz range. Japan utilise a different system still, expanding the 2.4 GHz range beyond the acceptable ISM guidelines by 10.5 MHz to allow for an additional 14th channel with 11 MHz of non-interference from other channels (see Figure below) [80], [81], [82].

−	[[File:WiFi.jpg\|~~RTENOTITLE~~]]	+	[[File:WiFi.jpg\|link=File:WiFi.jpg]]

	Image. 22MHz channel allocations for WiFi 2.4GHz frequencies, with curvatures implying affinities for intra-channel frequency selection.		Image. 22MHz channel allocations for WiFi 2.4GHz frequencies, with curvatures implying affinities for intra-channel frequency selection.
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	WiFi communication protocols are Internet Protocol (IP) based where the destination address is in packet headers allowing large amounts of data to be transmitted through a network of nodes at high speed. This means that on any WiFi network a central control node (network coordinator) will allocate all IP’s in the network on discovery allowing for any packets to be addressed and routed to a connected device [82].		WiFi communication protocols are Internet Protocol (IP) based where the destination address is in packet headers allowing large amounts of data to be transmitted through a network of nodes at high speed. This means that on any WiFi network a central control node (network coordinator) will allocate all IP’s in the network on discovery allowing for any packets to be addressed and routed to a connected device [82].

−	----	+	-----
−		+	This article was created by --[[User:BRE_Group\|BRE]]. It was taken from The future of electricity in domestic buildings, a review, by Andrew Williams, published in November 2014.
−	This article was created by --[[User~~%3ABRE%20Group~~\|BRE]]. It was taken from The future of electricity in domestic buildings, a review, by Andrew Williams, published in November 2014.~~<br/>~~	+

	NB The term 'WiFi' was coined by the Wi-Fi Alliance as shorthand for wireless local area network (WLAN) products based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards. It did not specifically 'stand for' anything. It has popularly been adopted to mean Wireless Fidelity but this is not correct.		NB The term 'WiFi' was coined by the Wi-Fi Alliance as shorthand for wireless local area network (WLAN) products based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards. It did not specifically 'stand for' anything. It has popularly been adopted to mean Wireless Fidelity but this is not correct.
Line 21:		Line 19:

	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===
−	*Bluetooth.	+
−	*CAT5.	+	* Bluetooth.
−	*Ethernet	+	* CAT5.
−	*Extranet	+	* Ethernet
−	*Glossary of electrical terms.	+	* Extranet
−	*ICT and Automation (ICTA) Scoping Study Report.	+	* Glossary of electrical terms.
−	*Information and communications technology.	+	* ICT and Automation (ICTA) Scoping Study Report.
−	*Internet of things.	+	* In-building wireless.
−	*Local area network.	+	* Information and communications technology.
−	*Smart buildings.	+	* Internet of things.
−	*Smart cities.	+	* Local area network.
−	*Smart technology.	+	* Smart buildings.
−	*The future of electricity in domestic buildings.	+	* Smart cities.
−	*WiMax.	+	* Smart technology.
−	*ZigBee.	+	* The future of electricity in domestic buildings.
		+	* WiMax.
		+	* ZigBee.

	=== External references ===		=== External references ===
−	*[80] E. G. Villegas, E. López-Aguilera, R. Vidal and J. Paradells. Effect of adjacent-channel interference in IEEE 802.11 WLANs. Cognitive Radio Oriented Wireless Networks and Communications, Orlando, 2007.	+
−	*[81] Butler J. Wireless Networking in the Developing World, Copenhagen: Creative Commons, 2013.	+	* [80] E. G. Villegas, E. López-Aguilera, R. Vidal and J. Paradells. Effect of adjacent-channel interference in IEEE 802.11 WLANs. Cognitive Radio Oriented Wireless Networks and Communications, Orlando, 2007.
−	*[82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.	+	* [81] Butler J. Wireless Networking in the Developing World, Copenhagen: Creative Commons, 2013.
		+	* [82] Institute of Electrical and Electronics Engineering, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standards, 2012.

	[[Category:Products_/_components]]		[[Category:Products_/_components]]

Designing Buildings: moved WiFi to WiFi definition

2015-09-22T07:44:38Z

moved WiFi to WiFi definition

← Older revision

Revision as of 07:44, 22 September 2015

31.54.0.216 at 15:08, 2 July 2015

2015-07-02T15:08:32Z

← Older revision		Revision as of 15:08, 2 July 2015
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	----		----

−	This article was created by --[[User%3ABRE%20Group\|BRE]]. It was taken from The future of electricity in domestic buildings, a review, by Andrew Williams, published in November 2014.	+	This article was created by --[[User%3ABRE%20Group\|BRE]]. It was taken from The future of electricity in domestic buildings, a review, by Andrew Williams, published in November 2014.<br/>
		+
		+	NB The term 'WiFi' was coined by the Wi-Fi Alliance as shorthand for wireless local area network (WLAN) products based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards. It did not specifically 'stand for' anything. It has popularly been adopted to mean Wireless Fidelity but this is not correct.

	= Find out more =		= Find out more =

31.54.0.216 at 15:06, 2 July 2015

2015-07-02T15:06:32Z

← Older revision		Revision as of 15:06, 2 July 2015
Line 1:		Line 1:

−	~~Wireless Fidelity~~ technology (IEEE802.11) can be broadly categorised to IEEE802.11 a/b/g/n/ac. Each is an improvement in transmission speed and/or signal range from the previous, although these days only ‘G’ and ‘N’ are used. The standard G versions of networking devices have an optimal transmission speed of 54 Mbps with an indoor range of approximately 40 m whereas the N versions have a theoretical maximum speed of 300 Mbps (practical of approximately 150 Mbps and above) with an indoor range in the region of 70 m. In addition to this N variations offer the choice of two frequency ranges; 2.4 GHz or 5 GHz. The higher frequency has no impact on the range but offers a potentially less polluted frequency to help reduce crosstalk noise.	+	WiFi technology (IEEE802.11) can be broadly categorised to IEEE802.11 a/b/g/n/ac. Each is an improvement in transmission speed and/or signal range from the previous, although these days only ‘G’ and ‘N’ are used. The standard G versions of networking devices have an optimal transmission speed of 54 Mbps with an indoor range of approximately 40 m whereas the N versions have a theoretical maximum speed of 300 Mbps (practical of approximately 150 Mbps and above) with an indoor range in the region of 70 m. In addition to this N variations offer the choice of two frequency ranges; 2.4 GHz or 5 GHz. The higher frequency has no impact on the range but offers a potentially less polluted frequency to help reduce crosstalk noise.

	Both the G and the N devices utilise the same channel capabilities but these vary regionally. In Europe (including UK) a channel system of 1-13 is used whereas in the US the system uses 1-11. Both use the same frequency ranges resulting in an approximate frequency void of 16.5 MHz at the end of the 2.4 GHz range. Japan utilise a different system still, expanding the 2.4 GHz range beyond the acceptable ISM guidelines by 10.5 MHz to allow for an additional 14th channel with 11 MHz of non-interference from other channels (see Figure below) [80], [81], [82].		Both the G and the N devices utilise the same channel capabilities but these vary regionally. In Europe (including UK) a channel system of 1-13 is used whereas in the US the system uses 1-11. Both use the same frequency ranges resulting in an approximate frequency void of 16.5 MHz at the end of the 2.4 GHz range. Japan utilise a different system still, expanding the 2.4 GHz range beyond the acceptable ISM guidelines by 10.5 MHz to allow for an additional 14th channel with 11 MHz of non-interference from other channels (see Figure below) [80], [81], [82].

Designing Buildings at 09:20, 30 January 2015

2015-01-30T09:20:06Z

← Older revision		Revision as of 09:20, 30 January 2015
Line 32:		Line 32:
	*Smart technology.		*Smart technology.
	*The future of electricity in domestic buildings.		*The future of electricity in domestic buildings.
		+	*WiMax.
	*ZigBee.		*ZigBee.

Designing Buildings at 11:51, 5 January 2015

2015-01-05T11:51:11Z

← Older revision		Revision as of 11:51, 5 January 2015
Line 32:		Line 32:
	*Smart technology.		*Smart technology.
	*The future of electricity in domestic buildings.		*The future of electricity in domestic buildings.
		+	*ZigBee.

	=== External references ===		=== External references ===