Re: [ippm] New QUIC Packet Loss Measurement (draft-cfb-ippm-spinbit-measurements)

[Dmitri Tikhonov <[e-mail]>]

Hello,

On Wed, Apr 22, 2020 at 07:11:38PM +0000, Bulgarella Fabio (Guest) wrote:
> 4. First of all, our solution is not dependent on any specific protocol
> implementation unlike the QL and therefore there shouldn’t be problems
> related to the quality of the implementation. In other words, our
> portion of code is always the same, in every protocol implementation.

I do not understand this part.  Problems in which protocol
implementation do you mean -- the loss measurement protocol
or some other protocol?  If the former, I do not understand
what you mean by "our portion of code:"  Each implementer will
write his own code, with his own bugs.

> Secondly, as anticipated in point 2, by observing only one direction
> we can measure the losses in the operator's domain (Qbit) and the
> end-to-end in the opposite direction (Rbit). So, our solution does work
> also for asymmetric path segments.

I already covered this, but I believe it can bear restating:
Besides loss measurement, a probe should aid to locate the source
of the loss: upstream or downstream.  A single QR probe cannot do it.
Do you not agree that locating loss source is one of the probe's goals?

  - Dmitri.