I agree with Fabrice's comments, that's how I read the document. On Thu, Jun 14, 2018 at 6:07 PM Yasuyuki Tanaka <[email protected]> wrote:
> Thank you, Fabrice! > > > the backoff window is selected randomly between 0 and 2^BE-1. > > According to you, the term of "the backoff window" seems to be used as the > retransmission backoff or the retransmission backoff wait. If so, I was > confused by a sentence in the third paragraph of the section, "A successful > transmission in a shared link resets the backoff window to the minimum > value." > > What is "reset" or the minimum value...? > > Perhaps, the backoff window there is meant (2^BE - 1) and its minimum > value is (2^macMinBe - 1). > > > dedicated links > no collision / no backoff. > > You transmit it without delay > > (NB: you may have the first transmission during a shared link, and its > retransmission in a dedicated one) > > Yes, that how it works. > > > If I understand correctly the standard, in that case, the dedicated link > should not impact the BE value: the next packet will be picked in the > queue, and transmitted with the same BE value as previously. > > Hmm, what if that next packet is not acknowledged in the first attempt? > > Will it use the *same* BE value in the following retransmission as > perviously or use macMinBe as described in the standard, which could be > different from the BE value used previously...? > > > "NB is the number of times the CSMA-CA algorithm was required to back > off while attempting the current transmission" > > Aha, I see; then we need "NB=0" just after the "Retransmission?" box ;-) > > > I have also the same doubts as you for the figure 6.6…. > > It'd be great if someone is woking on revising the figure... (>_<) > > Best, > Yatch > _______________________________________________ > 6tisch mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/6tisch > -- ________________________________________ Thomas Watteyne, PhD Research Scientist & Innovator, Inria Sr Networking Design Eng, Analog Devices Founder & co-lead, UC Berkeley OpenWSN Co-chair, IETF 6TiSCH www.thomaswatteyne.com ________________________________________
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