ZyXEL Communications NWA Series User Manual page 135

Table 55 Configuration > Object > AP Profile > Radio > Add/Edit Profile (continued)
LABEL DESCRIPTION
Time Interval Select this option to have the Zyxel Device survey the other APs within its broadcast radius
at the end of the specified time interval.
DCS Time Interval This field is available when you set Channel Selection to DCS and select the Time Interval
option.
Enter a number of minutes. This regulates how often the Zyxel Device surveys the other APs
within its broadcast radius. If the channel on which it is currently broadcasting suddenly
comes into use by another AP, the Zyxel Device will then dynamically select the next
available clean channel or a channel with lower interference.
Schedule Select this option to have the Zyxel Device survey the other APs within its broadcast radius
at a specific time on selected days of the week.
Start Time Specify the time of the day (in 24-hour format) to have the Zyxel Device use DCS to
automatically scan and find a less-used channel.
Week Days Select each day of the week to have the Zyxel Device use DCS to automatically scan and
find a less-used channel.
Advanced Settings
Guard Interval This field is available only when the channel width is 20/40MHz or 20/40/80MHz and the
802.11 Mode is either 11n or 11ac.
Set the guard interval for this radio profile to either short or long.
The guard interval is the gap introduced between data transmission from users in order to
reduce interference. Reducing the interval increases data transfer rates but also increases
interference. Increasing the interval reduces data transfer rates but also reduces
interference.
Enable A-MPDU This field is not available when you set 802.11 Mode to 11a or 11b/g.
Aggregation
Select this to enable A-MPDU aggregation.
Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their
802.11n headers and wraps them in a 802.11n MAC header. This method is useful for
increasing bandwidth throughput in environments that are prone to high error rates.
Enable A-MSDU This field is not available when you set 802.11 Mode to 11a or 11b/g.
Aggregation
Select this to enable A-MSDU aggregation.
Mac Service Data Unit (MSDU) aggregation collects Ethernet frames without any of their
802.11n headers and wraps the header-less payload in a single 802.11n MAC header. This
method is useful for increasing bandwidth throughput. It is also more efficient than A-MPDU
except in environments that are prone to high error rates.
RTS/CTS Threshold Use RTS/CTS to reduce data collisions on the wireless network if you have wireless clients
that are associated with the same AP but out of range of one another. When enabled, a
wireless client sends an RTS (Request To Send) and then waits for a CTS (Clear To Send)
before it transmits. This stops wireless clients from transmitting packets at the same time
(and causing data collisions).
A wireless client sends an RTS for all packets larger than the number (of bytes) that you
enter here. Set the RTS/CTS equal to or higher than the fragmentation threshold to turn RTS/
CTS off.
Beacon Interval When a wirelessly networked device sends a beacon, it includes with it a beacon interval.
This specifies the time period before the Zyxel Device sends the beacon again. The interval
tells receiving devices on the network how long they can wait in low-power mode before
waking up to handle the beacon. A high value helps save current consumption of the
access point.
DTIM Delivery Traffic Indication Message (DTIM) is the time period after which broadcast and
multicast packets are transmitted to mobile clients in the Active Power Management
mode. A high DTIM value can cause clients to lose connectivity with the network. This value
can be set from 1 to 255.
Chapter 13 AP Profile
NWA/WAC/WAX Series User's Guide
135