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Wireless and structured cabling - can 802.11n replace copper structure cabling ? - Los Angles and Orange county

posted Sep 23, 2011, 8:12 AM by David Khorram   [ updated Sep 23, 2011, 8:37 AM ]

Wireless and structured cabling 

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FTM Consulting has announced the release of its latest study, entitled the Wireless Impact on the SCS Market.

"Until recently, wireless did not provide the performance capability of structured cabling systems (SCS) using copper and fiber cabling," said Frank Murawski, President of FTM Consulting. "(But) newer technologies, such as 802.11n have now placed wireless on a par with structured cabling systems' performance. 

He added that future technologies including 802.11ac and 802.11ad will provide further performance improvements.

In addition, the proliferation of newer mobile devices, such as newer smartphones and tablets, especially the Apple iPad, has placed increasing pressures on enterprises to allow for these devices to be connected to the enterprises' network. 

"We view the Apple iPad as a game changer, being universally accepted, in conjunction with enterprises' apps being developed for use within enterprises," Murawski said.

The study indicates the following:

* Moderate impact on the SCS market over the short term with SCS market growth declining from 22.9% in 2011 to a 14.7% growth by 2016.

* Severe impact in the far term, starting in the 2016 to 2017 time period. 

Factors considered in the analysis included:

* Sunken investment in current networks

* Newer networks likelihood to go wireless, bypassing SCS, especially small remote offices

* High-speed applications, such as data centres and video, to be mainly immune to wireless

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Foot note:

The 802.11 family consists of a series of over-the-air modulation techniques that use the same basic protocol. The most popular are those defined by the 802.11b and 802.11g protocols, which are amendments to the original standard. 802.11-1997 was the first wireless networking standard, but 802.11b was the first widely accepted one, followed by 802.11g and 802.11n. 802.11n is a new multi-streaming modulation technique. Other standards in the family (c–f, h, j) are service amendments and extensions or corrections to the previous specifications.

802.11b and 802.11g use the 2.4 GHz ISM band, operating in the United States under Part 15 of the US Federal Communications Commission Rules and Regulations. Because of this choice of frequency band, 802.11b and g equipment may occasionally suffer interference from microwave ovenscordless telephones and Bluetooth devices. 802.11b and 802.11g control their interference and susceptibility to interference by using direct-sequence spread spectrum (DSSS) andorthogonal frequency-division multiplexing (OFDM) signaling methods, respectively. 802.11a uses the 5 GHz U-NII band, which, for much of the world, offers at least 23 non-overlapping channels rather than the 2.4 GHz ISM frequency band, where all channels overlap.[1] Better or worse performance with higher or lower frequencies (channels) may be realized, depending on the environment.

The segment of the radio frequency spectrum used by 802.11 varies between countries. In the US, 802.11a and 802.11g devices may be operated without a license, as allowed in Part 15 of the FCC Rules and Regulations. Frequencies used by channels one through six of 802.11b and 802.11g fall within the 2.4 GHz amateur radio band. Licensed amateur radio operators may operate 802.11b/g devices under Part 97 of the FCC Rules and Regulations, allowing increased power output but not commercial content or encryption.

EEE 802.11ac is a wireless computer networking standard of 802.11 currently under development which will provide high throughput Wireless Local Area Networks (WLAN) below 6 GHz[1] (what is commonly known as the 5 GHz band).

Theoretically, this specification will enable multi-station WLAN throughput of at least 1 Gigabit per second and a maximum single link throughput of at least 500 megabit per second (500 Mbit/s). This is accomplished by extending the air interface concepts embraced by 802.11n: wider RF bandwidth (up to 160 MHz), more MIMO spatial streams (up to 8), multi-user MIMO, and high-density modulation (up to 256 QAM).

On January 20, 2011, the Initial Technical Specification Draft 0.1[2] was confirmed by IEEE 802.11 TGac.[3]

Standard finalization is anticipated in late 2012, with final 802.11 Working Group approval in late 2013.[4] According to a study, devices with the 802.11ac specification are expected to become common by 2015 with an estimated 1 billion spread around the world.[5]

As of September 2011, there are no consumer devices implementing the draft specification.

Status of  802.11ad project

[hide]v · d · e802.11 network standards
Data rateper stream
ModulationApproximate indoor range[citation needed]Approximate outdoor range[citation needed]
Jun 19972.4201, 21DSSS,FHSS2066100330
aSep 19995206, 9, 12, 18, 24, 36, 48, 541OFDM35115120390
bSep 19992.4205.5, 111DSSS38125140460
gJun 20032.4206, 9, 12, 18, 24, 36, 48, 541OFDM,DSSS38125140460
nOct 20092.4/5207.2, 14.4, 21.7, 28.9, 43.3, 57.8, 65, 72.2[B]4OFDM70230250820[9]
4015, 30, 45, 60, 90, 120, 135, 150[B]70230250820[9]
  • A1 A2 IEEE 802.11y-2008 extended operation of 802.11a to the licensed 3.7 GHz band. Increased power limits allow a range up to 5,000 m. As of 2009, it is only being licensed in the United States by the FCC.
  • B1 B2 Assumes short guard interval (SGI) enabled, otherwise reduce each data rate by 10%.