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Re: [Question #676790]: SID

To: rohc@xxxxxxxxxxxxxxxxxxx
From: Didier Barvaux <question676790@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 17 Dec 2018 18:02:43 -0000
Reply-to: question676790@xxxxxxxxxxxxxxxxxxxxx
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Question #676790 on rohc changed:
https://answers.launchpad.net/rohc/+question/676790

    Status: Open => Answered

Didier Barvaux proposed the following answer:
Hello,

The logic behind the DF, RND, NBO and SID fields is not defined well.
Currently packet type IR-DYN is forced if there are 3 or more "dynamic
fields" that changed. However, UO packets with Extension 3 can transmit
changes for TTL, TOS, DF, NBO, RND. Those changes are counted as 4
changed fields, so UO with EXT3 is not used while it could be. It might
save some bits. The logic behind dynamic fields should be reworked. I
tried to do that on the master branch. See https://github.com/didier-
barvaux/rohc/commit/ce2d85396ee0b18e7ce376d28aae12f1b83806a0

Please give the updated master branch a try, and tell me how it behaves
for you.

Regards,
Didier

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