Issue link: https://read.uberflip.com/i/1428371
LoRaWAN Regional Parameters ©2016 LoRa™ Alliance Page 35 of 45 The authors reserve the right to change specifications without notice. AS923MHz end-devices should feature a channel data structure to store the parameters of 1 at least 16 channels. A channel data structure corresponds to a frequency and a set of data 2 rates usable on this frequency. 3 The following table gives the list of frequencies that should be used by end-devices to 4 broadcast the JoinReq message. 5 Modulation Bandwidth [kHz] Channel Frequency [MHz] FSK Bitrate or LoRa DR / Bitrate Nb Channels Duty cycle LoRa 125 923.20 923.40 DR2 2 < 1% Table 40: AS923 JoinReq Channel List 6 The default JoinReq Data Rate is DR2 (SF10/125KHz), this setting ensures that end-devices 7 are compatible with the 400ms dwell time limitation until the actual dwell time limit is notified 8 to the end-device by the network server via the MAC command "TxParamSetupReq". 9 The JoinReq message transmit duty-cycle shall follow the rules described in chapter 10 "Retransmissions back-off" of the LoRaWAN specification document. 11 12 2.7.3 AS923 Data Rate and End-point Output Power encoding 13 The following encoding is used for Data Rate (DR) in the AS923 band: 14 15 DataRate Configuration Indicative physical bit rate [bit/s] 0 LoRa: SF12 / 125 kHz 250 1 LoRa: SF11 / 125 kHz 440 2 LoRa: SF10 / 125 kHz 980 3 LoRa: SF9 / 125 kHz 1760 4 LoRa: SF8 / 125 kHz 3125 5 LoRa: SF7 / 125 kHz 5470 6 LoRa: SF7 / 250 kHz 11000 7 FSK: 50 kbps 50000 8..15 RFU Table 41: Data rate table 16 17 The TXPower table indicates power levels relative to the Max ERP level of the end-device, 18 as per the following table: 19 20 TXPower Configuration 0 Max ERP 1 Max ERP – 2dB 2 Max ERP – 4dB 3 Max ERP – 6dB 4 Max ERP – 8dB 5 Max ERP – 10dB 6..15 RFU Table 42: TxPower table 21 22