[Sis-dtn] Possible structure and logic for BIBE segmentation

[sburleig.sb at gmail.com]

Good point, Brian.  As someone on the call this morning pointed out, the
transmission ID in BIBE (as per the most recent I-D) serves a similar
purpose.

 

Scott

 

From: Sipos, Brian J. <Brian.Sipos at jhuapl.edu> 
Sent: Thursday, April 24, 2025 11:22 AM
To: sis-dtn at mailman.ccsds.org
Cc: sburleig.sb at gmail.com
Subject: Possible structure and logic for BIBE segmentation

 

All,

As I mentioned on the call today, the draft UDPCL update contains a portion
which defines a unidirectional segmentation mechanism [1] that has a slight
optimization for single-segment transfers. I'm offering this as an example
of a mechanism that is simple and has already had some amount of prototyping
done although in a different context.

 

The Transfer ID behaves as Felix had suggested on the call, which is that it
has no relationship to the bundle ID being segmented, it is purely a unique
correlator created by the encapsulating node. A receiver a windowed log of
seen Transfer IDs serves a secondary purpose for dropping duplicate
encapsulating bundles at the CLA before they reach the BPA. The rest of the
fields behave similarly to existing fragmentation/segmentation mechanisms.

 

Brian S.

 

[1]
https://www.ietf.org/archive/id/draft-ietf-dtn-udpcl-00.html#section-3.5.2

 

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