Cerio OW-200 A1, User Manual

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V3.0

AC Type
：
Queue Data Transmitted
AP to Clients
Priority Description
AC_BK Background Low High throughput. Bulk data that requires maximum
throughput and is not time-sensitive is sent to this
queue (FTP data, for example).
AC_BE Best Effort Medium Medium throughput and delay. Most traditional IP
data is sent to this queue.
AC_VI Video High Minimum delay. Time-sensitive video data is
automatically sent to this queue.
AC_VO Voice High Time-sensitive data like VoIP and streaming media
are automatically sent to this queue.

CWmin
: Minimum Contention Window. This parameter is input to the algorithm that
determines the initial random backoff wait time ("window") for retry of a transmission. The
value specified here in the Minimum Contention Window is the upper limit (in milliseconds) of
a range from which the initial random backoff wait time is determined.

CWmax
: Maximum Contention Window. The value specified here in the Maximum Contention
Window is the upper limit (in milliseconds) for the doubling of the random backoff value. This
doubling continues until either the data frame is sent or the Maximum Contention Window size
is reached. Once the Maximum Contention Window size is reached, retries will continue until a
maximum number of retries allowed is reached. Valid values for the "cwmax" are 1, 3, 7, 15, 31,
63, 127, 255, 511, or 1024. The value for "cwmax" must be higher than the value for
"cwmin".
。

AIFS
：
The Arbitration Inter-Frame Spacing Number specifies a wait time (in milliseconds) for
data frames
。

TxOP Limit
: Transmission Opportunity is an interval of time when a WME AP has the right to
initiate transmissions onto the wireless medium (WM). This value specifies (in milliseconds) the
Transmission Opportunity (TXOP) for AP; that is, the interval of time when the WMM AP has
the right to initiate transmissions on the wireless network.
。

ACM bit
: Admission Control Mandatory, ACM only takes effect on AC_VI and AC_VO. When you
do not click Checkbox, it means that the ACM is controlled by the connecting AP. If you click
Checkbox, it means that the Client is in charge
。

No ACK policy bit
: Acknowledgment Policy, WMM defines two ACK policies:
Normal ACK
and
No ACK
. Click “
Checkbox
” indicates “
No ACK
”
When the no acknowledgement (No ACK) policy is used, the recipient does not acknowledge
received packets during wireless packet exchange. This policy is suitable in the environment
where communication quality is fine and interference is weak.