[SCFN] FW: The King is Dead, Long Live the King: 802.11n dramatically improves Wi-Fi outdoors

[Michael Mee]

I haven't been keeping up, but one of the most intriguing things I 
discovered about 802.11n, apart from the MIMO etc, was that it uses 
802.11a frequencies (5.3 and 5.8 GHz - though perhaps not both?) as well 
as 2.4 GHz. Some (but not all) 802.11n devices have dual radios and can 
use them both based on conditions. Very cool!

cheers, michael

From: dewayne at warpspeed.com (Dewayne Hendricks)
Date: February 24, 2009 12:18:50 PM EST
To: Dewayne-Net Technology List <xyzzy at warpspeed.com>
Subject: [Dewayne-Net] The King is Dead, Long Live the King: 802.11n
dramatically improves Wi-Fi outdoors

[Note:  This item comes from friend Esme Vos.  Worth reading!  DLH]

The King is Dead, Long Live the King: 802.11n dramatically improves Wi-
Fi outdoors
February 23, 2009 at 7:54 PM by Ken Biba
<http://www.muniwireless.com/2009/02/23/80211n-dramatically-improves-outdoor-wifi/ 

>

IEEE 802.11n is the new international standard for wireless Local Area
Networks, incorporating new smart antenna technologies (MIMO -
Multiple In and Multiple Out) permitting a 5x performance and 2x
coverage improvement for WLANs. While this new technology is becoming
the de facto standard in consumer and enterprise networks, it has not
yet made an appearance in outdoor, metropolitan scale networks derived
from Wi-Fi technology.

Many of these same MIMO techniques are being incorporated in both
WiMax and in LTE for cellular networks. Sadly, neither is being
produced in much volume and fixed WiMax networks do not incorporate
MIMO technology.

There has been much dispute about whether the specifics of 802.11n
designed for indoor networks would apply to outdoor networks and bring
the economy of scale of 802.11 to outdoor applications. At Novarum, we
tested the effects of 802.11n on outdoor performance. We found
dramatic improvements in using indoor 802.11n technology outdoors, so
much so that 802.11n has become, for us, the recommended baseline for
new network deployments.

First, let’s review the key pieces of technology incorporated in
802.11n and how it might affect outdoor performance.

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