What is the maximum payload possible in WSMP?

Question

I searched in google, but I could see data is variable but maximum size is not given.

I could not find in IEEE1609.3 as well

Please help me out

Answer 1

WSM messages have variable length payloads. The theoretical maximum is 4096 bytes because the length field is only 12 bits (4 bits out of 2 bytes are reserved).

However, the recommended variable length of a WSM, including Data, is 1400 bytes as specified in the Annex B of the standard