User's Guide

Table Of Contents
Configuring the Wireless AP
hwc_apstartup.fm
Configuring Wireless AP settings
9034530-02, March 2010
134 HiPath Wireless Controller, Access Points and Convergence Software V7.11, User Guide
Non-802.11n clients, beacons, and multicasts use the 802.11a/b/g radio
protocols.
If the primary channel allows for both bonding types (up and down), you
can select the channel bonding type from the Channel Bonding drop-
down list.
If the primary channel allows for only one of the bonding types (up or
down), that channel bond type is displayed in the Channel Bonding
drop-down list.
•Auto – Channel bonding is automatically enabled or disabled, switching
between 20MHz and 40MHz, depending on how busy the extension channel
is. If the extension channel is busy above a prescribed threshold percentage,
which is defined in the 40MHz Channel Busy Threshold box, channel
bonding is disabled.
Channel selection — primary and extension
The primary channel of the Wireless 802.11n AP is selected from the Request
New Channel drop-down list. If auto is selected, the ACS feature selects the
primary channel. Depending on the primary channel that is selected, channel
bonding may be allowed: up, down, both, or neither.
Guard interval
The guard intervals ensure that individual transmissions do not interfere with one
another. The Wireless 802.11n AP provides a shorter guard interval that
increases the channel throughput. When a 40MHz channel is used, you can
select the guard interval to improve the channel efficiency. The guard interval is
selected from the Guard Interval drop-down list. Longer guard periods reduce
the channel efficiency.
Aggregate MSDU and MPDU
The Wireless 802.11n AP provides aggregate Mac Service Data Unit (MSDU)
and aggregate Mac Protocol Data Unit (MPDU) functionality, which combines
multiple frames together into one larger frame for a single delivery. This
aggregation reduces the overhead of the transmission and results in increased
throughput. The aggregate methods are enabled and defined selected from the
Aggregate MSDUs and Aggregate MPDUs drop-down lists.
Antenna selection
The Wireless 802.11n AP has three antennas: left, middle, and right. The
illustration below identifies the left and right antennas.