[Sis-dtn] Positive reception claim vs. Negative reception claim in LTP Report Segment preparation and processing

[구철회]

Greetings,

This is Cheol. I am developing an LTP reference implementation. During reading the LTP specification (RFC-5326), the preparation of reception claim in Report Segment makes me confusing about why it is positive claim not negative claim for segments that were not received successfully (i.e., NAK).

For reference, CFDP’s NAK PDU has the negative claim structure when it is requested to report missing PDUs. Does anyone know about the background of choosing the positive claim for NAK operation in LTP?
I think negative claim is simpler and more efficient in terms of overhead for sender and receiver both.
I like to listen experts’ opinion on LTP operation and honestly hope it to be changed in newly coming LTP spec.

Cheol

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ccsds.org/pipermail/sis-dtn/attachments/20220404/d33ae46c/attachment.htm>