802.11 standard allows for the fragmentation of unicast address frames. Fragmentation breaks an 802.11 frame into smaller pieces known as fragments.
On the other hand, if the network is experiencing a large amount of data corruption, lowering the 802.11 fragmentation setting may improve data throughput as you could image as the following situation.
above the picture from cwap
The following picture shows an MSDU that has been fragmented into four fragments. Notice that the transmission of each fragment is followed by a SFIS and an ACK.
above the picture from CWAP
On the other hand, if the network is experiencing a large amount of data corruption, lowering the 802.11 fragmentation setting may improve data throughput as you could image as the following situation.
above the picture from cwap
In 802.11n, there are two types of frame aggregation were added, aggregate MAC service data unit and aggregate MAC protocol data.
above pictures from CWAP
There are some restrictions for aggregating multiple MSDUs into a single MPDU.
The MPDU can only contain MSDUs where the DA and SA values map to the same RA and TA value. All of the MSDUs must also have the same priority value.
On the other hand, A-MPDU must all have the same receiver address. Also the individual MPDUs must all be of the same 802.11e QoS access category.
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