802.11n

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802.11n

An IEEE 802.11 Wi-Fi standard that increases transmission speeds to 600 Mbps and works in both the 2.4 GHz and 5 GHz frequency bands (see dual-band router). Although newer 802.11ac devices began to proliferate in 2013, 802.11n is expected to exist for some time because 11n speed is more than adequate for most purposes when only one or two users are transmitting at the same time.

Multiple Antennas (MIMO)
The 802.11n technology brought the use of multiple antennas, improving distance, reliability and speed. Up to four data streams can be sent simultaneously using 20MHz or 40MHz channels, providing a theoretical maximum data rate of 600 Mbps. See MIMO.

"Wi-Fi CERTIFIED n" and Draft-2.0
The official "Wi-fi CERTIFIED n" standard was ratified in 2009; however, the Wi-Fi Alliance released a preliminary "Draft-2.0" specification in 2007, also called "Draft-N," to promote interoperability among early equipment. Even before Draft-N, vendors offered "Pre-N" products. See MIMO, 802.11 and 802.11ac.


Pre-N Equipment
Prior to Draft 2.0, Belkin released this wireless router with two transmitters and three receivers to deliver up to 108 Mbps. As non-certified devices, both sides of the transmission had to be Belkin equipment. (Image courtesy of Belkin Corporation, www.belkin.com)
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announced that a wavelet-based broadband-over-powerline (BPL) technology jointly proposed by the two companies has been accepted as part of Draft 2.
lt;p>The Wi-Fi Alliance has stated that its revised certification process based on the final standard will "preserve interoperability" with the current spec, again based on Draft 2.
Today's Wi-Fi-certified WLAN products, based on draft 2.
NetLogic Microsystems will be showcasing its NLP10142 PHY solution in a complete end-to-end 100GE environment that is compliant with Draft 2.
11-based products, has confirmed that certified Draft 2.
11a/g is obviously the most favored technology at the moment with about 84% market share, enterprises have been switching to the draft 2.
11 working group, which has developed all the major wireless LAN standards, voted on Friday to send Draft 2.
It's now officially Round 2, with the industry this time in fisticuffs over Draft 2.
11n BlueSecure Access Point 1800 (BSAP-1800) based on draft 2.
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