Esteban, I believe this is fully specified in the 802.15.4 standard. In a nutshell, the back-off mechanism is triggered only when the cell is marked as "shared". When a mote sends a packet and doesn't get an ACK, the BE is changed. If you send a frame to link-layer destination 0xffff, you're not expecting an ACK, so BE will not change.
I may be missing your point? Thomas On Thu, Feb 9, 2017 at 10:59 AM, Esteban Municio < [email protected]> wrote: > Hi all, > > I was wondering if there is any recommendation about how set up the > Backoff mechanism in shared cells when no ACKs are expected. > > According to the standard, macMaxBE and macMinBE are defined and the BE > is increased at every attempt. However, if the node is not expecting any > ACK (i.e sending DIOs or EBs), I guess the BE will be always the same. > Is there any recommendation in Minimal about how to choose this value? > > Maybe a value related with the number of nodes or DIO/EB period? > > Kind regards, > Esteban > > -- > Esteban Municio > IDLab - Dept. Mathematics and Computer Science > University of Antwerp - imec > Middelheimlaan 1 , 2020 Antwerp, Belgium > Office M.G.325 > > _______________________________________________ > 6tisch mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/6tisch > > -- _______________________________________ Thomas Watteyne, PhD Research Scientist & Innovator, Inria Sr Networking Design Eng, Linear Tech Founder & co-lead, UC Berkeley OpenWSN Co-chair, IETF 6TiSCH www.thomaswatteyne.com _______________________________________
_______________________________________________ 6tisch mailing list [email protected] https://www.ietf.org/mailman/listinfo/6tisch
