Station-To-Station Traffic; Interference Has A Direct Correlation To Throughput; Maximizing Throughput - GE MDS iNET Series Reference Manual

4.4.6 Station-to-Station Traffic

When sending frames from an endpoint connected to one transceiver to another endpoint with a different
transceiver, the throughput will be halved at best. This is because all frames must go through the AP and
thus are transmitted twice over the same radio system. Therefore, in the previous 100-byte UDP example,
the number of over-the-air bytes will be 380 bytes (190 bytes x 2) if the frame has to go station-to-station.

4.4.7 Interference has a Direct Correlation to Throughput

Interference could be caused by other radios at the same site, in nearby locations, or by high power trans-
mitters such as paging systems.

4.4.8 Maximizing Throughput

Here are some suggestion on things to try that may maximize throughput:
1. AP Only: Increment the
stay longer on a channel. The down side is that if a particular channel is interfered with it will take
longer to hop to another channel.
(
Main Menu>>Radio Configuration>>Dwell Time
2. AP Only: Change the
sent out. On the down side, association time may be a little longer.
(
Main Menu>>Radio Configuration>>Beacon Period
3. Change the
Fragmentation Threshold
reducing overhead. On the other hand, if a packet is corrupted it will take longer to be retransmitted.
(
Main Menu>>Radio Configuration>>Fragmentation Threshold
4. Increase the
RTS Threshold
number. On the other hand, a hidden-node might interfere more often than if RTS was not used.
(
Main Menu>>Radio Configuration>>RTS Threshold
Decreasing the
RTS Threshold,
will add small packets, but reduce collisions (and resulting re-tries) of large packets.
(
Main Menu>>Radio Configuration>>RTS Threshold
5. Activate compression on the Radio Configuration Menu (
6. Use the
Performance Information Menu
Menu>>Performance Information>>Packet Statistics>>Packets Received by Zone
Readings should be close in value. A significantly lower value (2% reduction) probably indicates inter-
ference. Performance can be improved by blocking the affected zones at the Access Point. (
Menu>>Radio Configuration>>Skip Zone Option
7. Use the
Performance Information Menu
Ethernet traffic.
With weak signals, interference, or hidden nodes, the optimal performance may be lower due to colli-
sions and retries.
05-2806A01, Rev. L
to the maximum of 262.1 ms. This lowers the overhead since it will
Dwell Time
to
Beacon Period Normal
to the maximum of 1600. Longer packets will be sent over the air
to 1600. RTS mechanism is used to reserve a time slot if packets exceed this
to the 100 to 200 range, may improve throughput on a busy network. It
to check the packets received by zone. (Remotes Only:
to check for errors, retries and dropped packets. Do the same with
MDS iNET Series Reference Manual
)
(508 ms). This will also reduce the overhead of beacons
)
)
)
)
Compression enabled
)
).
Main
)
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