H3C Technologies H3C MSR 50 - Manual (Page 133)

112
Item Description
A-MSDU
Selecting the A-MSDU option enables A-MSDU.
Multiple MSDUs can be aggregated into a single A-MSDU. This reduces the MAC
header overhead, improving MAC layer forwarding efficiency.
Only A-MSDUs can be received.
IMPORTANT:
When 802.11n radios are used in a mesh WLAN, make sure that they have the same
A-MSDU configuration.
A-MPDU
Selecting the A-MPDU option enables A-MPDU.
802.11n introduces the A-MPDU frame format. By using only one PHY header, each
A-MPDU can accommodate multiple Message Protocol Data Units (MPDUs) which
have their PHY headers removed. This reduces the overhead in transmission and the
number of ACK frames to be used, and thus improves network throughput.
IMPORTANT:
When 802.11n radios are used in a mesh WLAN, make sure that they have the same
A-MSDU configuration.
short GI
Selecting the short GI option enables short GI.
Delays may occur during receiving radio signals due to factors like multi-path
reception. Therefore, a subsequently sent frame may interfere with a previously sent
frame. The GI function is used to avoid such interference. It increases the throughput
by 10 percent.
The short GI function is independent of bandwidth and thus supports both 20MHz
and 40MHz bandwidths.
Figure 109 Configuring advanced settings for the radio