Issue link: https://read.uberflip.com/i/1540208
Regional Parameters RP002-1.0.5 ©2022-2025 LoRa Alliance ® Page 87 of 116 The authors reserve the right to change specifications without notice. If the end-device will never operate with a repeater, the maximum application payload length 1786 in the absence of the OPTIONAL FOpts control field SHOULD be: 1787 1788 Data Rate M N 0 59 51 1 59 51 2 59 51 3 123 115 4 250 242 5 250 242 12 250 242 13 250 242 6:11 and 14:15 Not defined Table 86: KR920-923 maximum payload size (not repeater compatible) 1789 3.11.7 KR920-923 Receive Windows 1790 By default, the RX1 receive window uses the same channel as the preceding uplink. The data 1791 rate is a function of the uplink data rate and the RX1DROffset, as given by the following 1792 table. The allowed values for RX1DROffset are in the [0:5] range. Values in the [6:7] range 1793 are reserved for future use and end-devices SHALL NOT accept these settings in any 1794 command, neither a RXParamSetupReq, which SHALL cause a negative acknowledgement 1795 of RX1DROffsetACK in RXParamSetupAns, nor a Join-Accept which SHALL be silently 1796 ignored. 1797 1798 Uplink Data Rate Downlink Data rate RX1DROffset 0 1 2 3 4 5 DR0 DR0 DR0 DR0 DR0 DR0 DR0 DR1 DR1 DR0 DR0 DR0 DR0 DR0 DR2 DR2 DR1 DR0 DR0 DR0 DR0 DR3 DR3 DR2 DR1 DR0 DR0 DR0 DR4 DR4 DR3 DR2 DR1 DR0 DR0 DR5 DR5 DR4 DR3 DR2 DR1 DR0 DR12 DR12 DR5 DR4 DR3 DR2 DR1 DR13 DR13 DR12 DR5 DR4 DR3 DR2 Table 87: KR920-923 downlink RX1 data rate mapping 1799 The RX2 receive window uses a fixed frequency and data rate. The default parameters are 1800 921.90 MHz / DR0 (SF12, 125 kHz). 1801 3.11.8 KR920-923 Class B Beacon and Default Downlink Channel 1802 The beacon frame content is defined in Section 5.1.3. 19 1803 The default beacon data rate is DR3. 1804 The default beacon broadcast frequency is 923.1 MHz. 1805 The default class B downlink ping-slot frequency is 923.1 MHz 1806 19 Prior to LoRaWAN 1.0.4, the KR920 beacon format was defined here as: Size (bytes) 2 4 2 7 2 BCNPayload RFU Time CRC GwSpecific CRC