Cerio DT-300N, Руководство пользователя

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
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. While
the No ACK policy helps improve transmission efficiency, it can cause increased packet
loss when communication quality deteriorates. This is because when this policy is used,
a sender does not retransmit packets that have not been received by the recipient.
When the Normal ACK policy is used, the recipient acknowledges each received uncast
packet.
。