Issue link: https://read.uberflip.com/i/1428359
LoRaWAN 1.0.3 Regional Parameters ©2018 LoRa™ Alliance Page 51 of 71 The authors reserve the right to change specifications without notice. UplinkDwellTime = 0 UplinkDwellTime = 1 DownlinkDwellTime = 0 DownlinkDwellTime = 1 0 59 N/A 59 N/A 1 59 N/A 59 N/A 2 59 19 59 19 3 123 61 123 61 4 230 133 230 133 5 230 250 230 250 6 230 250 230 250 7 230 250 230 250 8:15 RFU RFU Table 54: AS923 maximum payload size 1228 If the end-device will never operate with a repeater then the maximum MAC payload length 1229 should be: 1230 DataRate Uplink MAC Payload Size (M) Downlink MAC Payload Size (M) UplinkDwellTime = 0 UplinkDwellTime = 1 DownlinkDwellTime = 0 DownlinkDwellTim e = 1 0 59 N/A 59 N/A 1 59 N/A 59 N/A 2 59 19 59 19 3 123 61 123 61 4 250 133 250 133 5 250 250 250 250 6 250 250 250 250 7 250 250 250 250 8:15 RFU RFU Table 55: AS923 maximum payload size (not repeater compatible) 1231 The maximum application payload length in the absence of the optional FOpt control field (N) 1232 is eight bytes lower than the MACPayload value in the above table. The value of N might be 1233 smaller if the FOpt field is not empty. 1234 1235 2.8.7 AS923 Receive windows 1236 The RX1 receive window uses the same channel than the preceding uplink. The data rate is 1237 a function of the uplink data rate and the RX1DROffset as following: 1238 Downstream data rate in RX1 slot = MIN (5, MAX (MinDR, Upstream data rate – 1239 Effective_RX1DROffset)) 1240 MinDR depends on the DownlinkDwellTime bit sent to the device in the TxParamSetupReq 1241 command: 1242 • Case DownlinkDwellTime = 0 (No limit): MinDR = 0 1243 • Case DownlinkDwellTime = 1 (400ms): MinDR = 2 1244 The allowed values for RX1DROffset are in the [0:7] range, encoded as per the below table: 1245 RX1DROffset (Coded value) 0 1 2 3 4 5 6 7 Effective_RX1DROffset 0 1 2 3 4 5 -1 -2 Values in the [6:7] range allow setting the Downstream RX1 data rate higher than Upstream 1246 data rate. 1247 The RX2 receive window uses a fixed frequency and data rate. The default parameters are 1248 923.2 MHz / DR2 (SF10/125KHz). 1249