Issue link: https://read.uberflip.com/i/1479525
LoRaWAN® Regional Parameters RP002-1.0.4 ©2022 LoRa Alliance ® Page 70 of 101 The authors reserve the right to change specifications without notice. 2.10.5 AS923 LinkADRReq Command 1394 The AS923 channel plan of LoRaWAN supports a minimum of 24 and a maximum of 80 1395 channels. The ChMaskCntl field of the LinkADRReq command has the following meaning: 1396 1397 ChMaskCntl ChMask Applies To 0 Channels 0 to 15 1 Channels 16 to 31 2 Channels 32 to 47 3 Channels 48 to 63 4 Channels 64 to 79 5 10 LSBs control channel blocks 0 to 9, 6 MSBs are RFU 6 All channels ON: The device SHALL enable all currently defined channels independently of the ChMask field value. 7 RFU Table 60: AS923 ChMaskCntl value 1398 If ChMaskCntl = 5, the corresponding bits in the ChMask enable and disable a bank of eight 1399 channels defined by the following calculation: [ChannelMaskBit * 8, ChannelMaskBit * 8 1400 +7]. 1401 If the ChMask field value is RFU, the end-device SHALL reject the command and unset the 1402 Channel mask ACK bit in its response. 1403 2.10.6 AS923 Maximum Payload Size 1404 The maximum MACPayload size length (M) is given by the following table for both 1405 UplinkDwellTime and DownlinkDwellTime configurations: No Limit and 400ms. It is 1406 derived from the maximum allowed transmission time at the PHY layer, taking into account a 1407 possible repeater encapsulation layer. The maximum application payload length in the 1408 absence of the OPTIONAL FOpts MAC control field (N) is also given for information only. The 1409 value of N might be smaller if the FOpts field is not empty. 1410 1411 Data Rate DwellTime=0 (No Limit) DwellTime=1 (400 ms Limit) M N M N 0 59 51 N/A N/A 1 59 51 N/A N/A 2 123 115 19 11 3 123 115 61 53 4 230 222 133 125 5 230 222 230 222 6 230 222 230 222 7 230 222 230 222 8:15 Not defined Not defined Table 61: AS923 maximum payload size (repeater compatible) 1412 1413