signetlabdei/lorawan

ALOHA matrix in LoraInterferenceHelper

brunocitoni opened this issue · 1 comments

brunocitoni commented

Expected Behavior

As far as I understand, using the ALOHA Matrix in LoraInterferenceHelper should give rise to no collision between packets sent on different SFs

Actual Behavior

Packets of different SF can still collide and be lost using minf as the threshold, as the resulting SNIR could be a negative dB value but minf is always positive. Using -inf instead seems to fix this.

Steps to Reproduce the Problem

  1. Set up 6 nodes with different SF and use one shot sender to send 6 packets at the same time
  2. Observe debug info from LoraInterferenceHelper
DvdMgr commented

You are right! Setting the threshold as -inf fixes the issue. Fixed in 2340df1