[conex] Comments on draft-kutscher-conex-mobile-03.txt

[Nandita Dukkipati <[e-mail]>]

Following are my first parse of comments/questions
on draft-kutscher-conex-mobile-03.txt (as individual contributor). Please
fwd to your co-authors - I do not have their emails right now.

Nandita
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1. First of, this is a nice draft elucidating the use of ConEx in mobile
scenarios. At a high level, my take is that the draft expands upon the use
scenarios presented in ConEx Concepts and Uses, but putting it in the
context of mobile networks.

Mobile networks are an apt example for ConEx usage given their limited
bandwidth and the fact that they already perform some sort of detailed
per-use volume accounting. As you mention, hopefully adding congestion
based accounting can be built upon it.

2. Sec 3.4 ConEx as a Form of Differential QoS
I don't get this para at all. Please consider rewording.

3. A high level question: do you have any data on loss rates (exposed to
TCP) in mobile (cellular) networks?

Is it true that link layer protocols perform aggressive retransmissions to
mask losses from higher layers such as TCP - and if so, what does this
property mean in the context of ConEx. If very little loss is exposed to
higher layers, how will the end systems give ConEx feedback to the network?

A discussion on those lines would be great in this draft.

4. Finally, the draft is filled with many 3GPP acronyms of which I know
very little - but I guess you can't do anything about that :-)