On Mon, 23 Nov 2020 11:56:13 +0100 Robert Hartung <hart...@ibr.cs.tu-bs.de> wrote:
> just my two cents regarding LQI: > The LQI is very different for different radios. So be aware of that > in heterogeneous networks with different radios! True, the standard (IEEE 805.15.4-2020) only states > The LQI measurement shall be performed for each received packet. The > minimum and maximum LQI values (0x00 and 0xff) should be associated > with the lowest and highest quality compliant signals detectable by > the receiver, and LQI values in between should be uniformly > distributed between these two limits. At least eight unique values of > LQI shall be used. However, RPL (MR-HOF) uses hysteresis and by default requires an improvement of 192 on the whole path before it switches. So as long as LQI can give a rough estimate of link quality, it should be good enough. This is not about estimating distance where some sort of accuracy was required, but just to throw out really bad links. Best, Benjamin _______________________________________________ users mailing list users@riot-os.org https://lists.riot-os.org/mailman/listinfo/users
