Issue link: https://read.uberflip.com/i/1479525
LoRaWAN® Regional Parameters RP002-1.0.4 ©2022 LoRa Alliance ® Page 90 of 101 The authors reserve the right to change specifications without notice. 1825 Data Rate LDRO Parameter Status BW125, SF7 to SF10 0 Disabled BW125, SF11 and SF12 1 Enabled BW250, SF7 to SF11 0 Disabled BW250, SF12 1 Enabled BW500, SF7 to SF12 0 Disabled Table 99: LoRa physical layer settings for LDRO 1826 4.1.3 Class B Beacon Frame Content 1827 The beacon payload BCNPayload consists of a network common part and an OPTIONAL 1828 gateway-specific part. The size of the RFU fields for each part depend on the LoRa spreading 1829 factor used to send the beacon. The length is adjusted to fit LoRa modulation interleaving 1830 blocks, so that the network common part and gateway-specific part are carried by different 1831 portions of the radio packet. In addition, each part has an independent CRC. As a result, it is 1832 possible to receive correctly and detect the correct reception of the network common part, 1833 even if several gateways transmit concurrently a beacon with different gateway-specific parts. 1834 In that situation, the gateway-specific part will likely not be received correctly, and this will be 1835 detected by the CRC. 1836 Size (Octets) BCNPayload Common Gateway-Specific RFU Param Time CRC GwSpecific RFU CRC SF 8 BW125/BW500 1 4 2 7 3 2 SF 9 BW125/BW500 1 1 4 2 7 0 2 SF 10 BW125/BW500 2 1 4 2 7 1 2 SF 11 BW500 3 1 4 2 7 2 2 SF 12 BW500 4 1 4 2 7 3 2 Table 100: Beacon frame content 1837 1838 With Network Common Part Only With Network Common + Gateway-Specific Parts SF8 – 125KHz 55.8 ms 86.5 ms SF9 – 125KHz 111.6 ms 152.6 ms SF10 – 125KHz 223.2 ms 305.2 ms SF8 – 500KHz 14.0 ms 21.6 ms SF9 – 500KHz 27.9 ms 38.1 ms SF10 – 500KHz 55.8 ms 76.3 ms SF11 – 500KHz 111.6 ms 152.6 ms SF12 – 500KHz 223.2 ms 305.2 ms Table 101: Beacon time-on-air 1839 1840