SIM8200 Series Max TCP payload size

[BehicMV]

Hi,
I am working on some GSM modules and I am using SIM800L right now. But the module supports 1420 bytes per TCP payload sending. I need more buffer size for this. Then I found SIM8200 5G modules. However the "TCP IP Applicaton Note" does not contains the max payload size.

Anyone knows what is the max size of TCP send payload? If it is 1420 again, do you know any GSM module that buffer size is higher than 1420 bytes? (Like 5kb - 10kb)

Thank you in advance

Behic.

 

[betwixt]

I'm not certain about this but I think the payload size is determined by the MTU of the transmission stream, not the silicon itself. If you want to send larger data it has to be spilt so each part is no bigger than MTU sized chunks.

Brian.

 

[D.A.(Tony)Stewart]

There could be a Jumbo Frame option of buffering to 4088 or 9014 bytes in the controller firmware.

Guidance on the use of jumbo frames

Guidance on the use of jumbo frames

kb.netgear.com

But this is outside my bandwidth.
There seem to be fragmentation issues > 1500 bytes.
https://www.cisco.com/c/en/us/suppo...e/25885-pmtud-ipfrag.html#toc-hId--1412502279