Wireless Array
Installing the Wireless Array
35
IEEE 802.11n Deployment Considerations
The Xirrus Arrays support IEEE 802.11n on all IAPs, in both 2.4 GHz and 5 GHz
bands. Use of 802.11n offers significant benefits:
Higher data rates
Higher throughput
Supports more users
More robust connections
Increased coverage area
More secure connections — supports WPA2 (Wi-Fi Protected Access 2)
These benefits result in better support for a wide range of applications such as
voice and video, intensive usage such as CAD/CAM and backups, dense user
environments, and for manufacturing and warehousing environments.
The techniques that 802.11n uses to realize these performance improvements, and
the results that can be expected are discussed in:
“MIMO (Multiple-In Multiple-Out)” on page 36
“Multiple Data Streams — Spatial Multiplexing” on page 37
“Channel Bonding” on page 38
“Improved MAC Throughput” on page 39
“Short Guard Interval” on page 39
“Obtaining Higher Data Rates” on page 40
“802.11n Capacity” on page 41
Two very important techniques to consider are
Channel Bonding
and
Multiple
Data Streams — Spatial Multiplexing
because they contribute a large portion of
802.11n’s speed improvements and because they are optional and configurable, as
opposed to the parts of 802.11n that are fixed. While the settings for 802.11n IAPs
come pre-configured on the Array for robust performance in typical usage, you
While 802.11n increases coverage area by almost doubling the reach, you
must consider the legacy wireless devices in your network. Wireless stations
connecting using 802.11a/b/g will still be subject to a reach of up to 100 feet,
depending on the environment.
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