MeshLinx MWI-5000 User Guide
MESHLINX CONFIDENTIAL
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7.1.12 Beacon Interval
The Beacon Interval is the period in milliseconds between beacon transmissions in a
BSS. This parameter can be adjusted higher or lower as a user requires, however
adjusting it to too high a value may cause stations to disassociate (station-dependent).
This is set to 100 milliseconds by default and the user should not need to modify it.
7.1.13 Fragmentation
The Fragmentation parameter determines whether or not the MWI-5000 MAC will
fragment frames into smaller pieces, as indicated by the Fragmentation Threshold
parameter. Typically, fragmentation is done to ensure that frames are transmitted cleanly
on the first try, by reducing the number of continuous bits transmitted and thereby the
likelihood of a transmission error.
Fragmentation overhead is significant, due to the acknowledgement required for every
fragment (as opposed to a single acknowledgement for the complete frame). Typically,
modern auto-rating algorithms obviate fragmentation . . . although there may be extreme
cases where better throughput could be achieved using fragmentation. Users in this
situation probably have a serious problem in their network that needs correcting first.
Normally, this parameter should not be modified by the user and should only be modified
either as an experiment or by a wireless expert who has determined that fragmentation
will solve a specific problem he’s experiencing.
7.1.14 RTS/CTS
The RTS/CTS parameter determines whether or not the MWI-5000 MAC will initiate an
RTS/CTS sequence preceding transmission of certain data frames, as indicated by the
RTS/CTS Threshold parameter. Typically, RTS/CTS exchanges are done to ensure the
medium is clear prior to transmitting data. Often, this is done to avoid the so-called
“hidden node problem”.
RTS/CTS overhead is significant, due to the RTS and CTS transmission times and the
SIFS times between them.
Normally, this parameter should not be modified by the user and should only be modified
either as an experiment or by a wireless expert who has determined that use of RTS/CTS
will solve a specific problem he’s experiencing (such as the hidden node problem).Sector
(interface) Operating Mode
