An Approach to Link Quality Measurement in 6TiSCH Networks

Radio link quality estimation is of crucial importance for providing required network performances and long-term stability. Using a single metric (e.g., Received Signal Strength Indicator - RSSI) can only provide a partial characterization of the particular link. Therefore, this paper proposes the method for link quality measurements in 6TiSCH networks based on several indicators for performance evaluation: the RSSI, Packet Delivery Ratio (PDR) for packet sequences, and CRC (Cyclic Redundancy Check). Additionally, for a two-dimensional graphical representation of RSSI measurements, the RSSI spatial heatmap has been implemented. The measurement campaign was performed on the OpenMote B hardware platform and OpenWSN software implementation and carried out in a home environment.