Issue link: https://read.uberflip.com/i/1540208
Regional Parameters RP002-1.0.5 ©2022-2025 LoRa Alliance ® Page 79 of 116 The authors reserve the right to change specifications without notice. 3.10.5 AS923 LinkADRReq Command 1593 The AS923 channel plan of LoRaWAN supports a minimum of 24 and a maximum of 80 1594 channels. The ChMaskCntl field of the LinkADRReq command has the following meaning: 1595 1596 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 71: AS923 ChMaskCntl value 1597 If ChMaskCntl = 5, the corresponding bits in the ChMask enable and disable a bank of eight 1598 channels defined by the following calculation: [ChannelMaskBit * 8, ChannelMaskBit * 8 1599 +7]. 1600 If the ChMask field value is RFU, the end-device SHALL 4 reject the command and unset the 1601 Channel mask ACK bit in its response. 1602 3.10.6 AS923 Maximum Payload Size 1603 The maximum MACPayload size length (M) is given by the following table for both 1604 UplinkDwellTime and DownlinkDwellTime configurations: No Limit and 400ms. It is 1605 derived from the maximum allowed transmission time at the PHY layer, taking into account a 1606 possible repeater encapsulation layer. The maximum application payload length in the 1607 absence of the OPTIONAL FOpts MAC control field (N) is also given for information only. The 1608 value of N might be smaller if the FOpts field is not empty. 1609 1610 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 8:11 Not defined Not defined 12 230 222 230 222 13 230 222 230 222 14:15 Not defined Not defined Table 72: AS923 maximum payload size (repeater compatible) 1611 1612 If the end-device will never operate with a repeater, the maximum application payload length 1613 in the absence of the OPTIONAL FOpts control field SHALL be: 1614 1615