[Sls-slp] “Maximum number of transfer frames given to the coding sublayer as a single data unit”

[Kazz, Greg (US 312B)]

Dear SLP WG,


Both the Telecommand SDLP  (232.0 Blue Book) and the USLP  (732.1 Blue Book) contain the same Managed Parameter (MP) under the MPs for a Physical Channel called, the

“Maximum number of transfer frames (TFs) given to the coding sublayer as a single data unit”.

In discussions at NASA, we find the word, Maximum to be problematic. This MP does not specify that the maximum is always used.  Just that there is a maximum.  Furthermore, at least in our security applications (Encyrption/Authenticated links), we have to be able to distinguish one CLTU with some number of TFs with another CLTU with a different number of TFs.

Ergo, NASA proposes we drop the word, “Maximum” from the MP name, and rename it to be: “The number of transfer frames given to the coding sublayer as a single data unit ."

Please let me know if you have any thoughts on this matter before the Fall meeting in Hamburg-Harburg.

In any case, let’s plan on discussing this topic as an agenda item at that upcoming SLP WG meeting, planned for Tuesday, Sept. 16, 2025.
N.B. The interoperability plenary is all day Monday, Sept. 15.

best regards,
Greg
Chair SLP WG

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