Issue link: https://read.uberflip.com/i/1479525
LoRaWAN® Regional Parameters RP002-1.0.4 ©2022 LoRa Alliance ® Page 77 of 101 The authors reserve the right to change specifications without notice. 2.11.5 KR920-923 LinkADRReq Command 1544 The KR920-923 channel plan of LoRaWAN supports a minimum of 24 and a maximum of 80 1545 channels. The ChMaskCntl field of the LinkADRReq command has the following meaning: 1546 1547 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 72: KR920-923 ChMaskCntl value 1548 If ChMaskCntl = 5, the corresponding bits in the ChMask enable and disable a bank of eight 1549 channels defined by the following calculation: [ChannelMaskBit * 8, ChannelMaskBit * 8 1550 +7]. 1551 If the ChMaskCntl field value is RFU, the end-device SHALL 16 reject the command and unset 1552 the Channel mask ACK bit in its response. 1553 2.11.6 KR920-923 Maximum Payload Size 1554 The maximum MACPayload size length (M) is given by the following table for the regulation 1555 of dwell time; less than 4 seconds with LBT. It is derived from a limitation of the PHY layer, 1556 depending on the effective modulation rate used, taking into account a possible repeater 1557 encapsulation layer. The maximum application payload length in the absence of the 1558 OPTIONAL FOpts control field (N) is also given for information only. The value of N might be 1559 smaller if the FOpts field is not empty. 1560 1561 Data Rate M N 0 59 51 1 59 51 2 59 51 3 123 115 4 230 222 5 230 222 6:15 Not defined Table 73: KR920-923 maximum payload size (repeater compatible) 1562 If the end-device will never operate with a repeater, the maximum application payload length 1563 in the absence of the OPTIONAL FOpts control field SHOULD be: 1564 1565 Data Rate M N 0 59 51 1 59 51 2 59 51 3 123 115 4 250 242 5 250 242 6:15 Not defined Table 74: KR920-923 maximum payload size (not repeater compatible) 1566