Cerio OW-200N2, User Manual

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User’s Manual
500mW eXtreme Power 11Na Outdoor Bridge
171
6.4.12 WMM Parameters of Station: This affects traffic flowing from the client station to
the access point.
Queue
Data
Transmitted
AP to Clients
Priorit
y
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 Mediu
m
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.
6.4.12.1 Aifsn : The Arbitration Inter-Frame Spacing Number specifies a wait time
(in milliseconds) for data frames.
6.4.12.2 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.
6.4.12.3 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".
6.4.12.4 Txop : 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.
6.4.12.5 ACM : Admission Control Mandatory, ACM only takes effect on AC_VI and