IEEE 802.15.4w-2020

This amendment defines a Low Power Wide Area Network (LPWAN) extension to the IEEE Std 802.15.4 Low Energy, Critical Infrastructure Monitoring (LECIM) PHY layer to cover network cell radii of typically 10-15 km in rural areas. It uses the LECIM PHY Frequency Shift Keying (FSK) modulation schemes with extensions to lower bit-rates (e.g. payload bit-rate typically <30 kb/s). Additionally, it extends the frequency bands to additional sub-GHz unlicensed and licensed frequency bands to cover the market demand. For improved data integrity in channels with high levels of interference, it defines mechanisms for the fragmented transmission of Forward Error Correction (FEC) code-words, as well as time and frequency patterns for the transmission of the fragments. Modifications to the Medium Access Control (MAC) layer, needed to support this PHY extension, are defined.