Issue link: https://read.uberflip.com/i/1428371
LoRaWAN Regional Parameters ©2016 LoRa™ Alliance Page 38 of 45 The authors reserve the right to change specifications without notice. The RX2 receive window uses a fixed frequency and data rate. The default parameters are 1 923.2 MHz / DR2 (SF10/125KHz). 2 3 2.7.8 AS923 Default Settings 4 The following parameters are recommended values for the AS923MHz band. 5 RECEIVE_DELAY1 1 s 6 RECEIVE_DELAY2 2 s (must be RECEIVE_DELAY1 + 1s) 7 JOIN_ACCEPT_DELAY1 5 s 8 JOIN_ACCEPT_DELAY2 6 s 9 MAX_FCNT_GAP 16384 10 ADR_ACK_LIMIT 64 11 ADR_ACK_DELAY 32 12 ACK_TIMEOUT 2 +/- 1 s (random delay between 1 and 3 seconds) 13 If the actual parameter values implemented in the end-device are different from those default 14 values (for example the end-device uses a longer RECEIVE_DELAY1 and 15 RECEIVE_DELAY2 latency), those parameters must be communicated to the network 16 server using an out-of-band channel during the end-device commissioning process. The 17 network server may not accept parameters different from those default values. 18 19 2.8 South Korea 920-923MHz ISM Band 20 2.8.1 KR920-923 Preamble Format 21 The following synchronization words should be used: 22 23 Modulation Sync word Preamble length LORA 0x34 8 symbols Table 46 :KR920-923 synch words 24 2.8.2 KR920-923 ISM Band channel frequencies 25 The center frequency, bandwidth and maximum EIRP output power for the South Korea 26 RFID/USN frequency band are already defined by Korean Government. Basically Korean 27 Government allocated LPWA based IoT network frequency band from 920.9 to 923.3MHz. 28 29 Center frequency (MHz) Bandwidth (kHz) Maximum EIRP output power (dBm) For end-device For gateway 920.9 125 10 23 921.1 125 10 23 921.3 125 10 23 921.5 125 10 23 921.7 125 10 23 921.9 125 10 23 922.1 125 14 23 922.3 125 14 23 922.5 125 14 23