Issue link: https://read.uberflip.com/i/1428359
LoRaWAN 1.0.3 Regional Parameters ©2018 LoRa™ Alliance Page 43 of 71 The authors reserve the right to change specifications without notice. 2.7 CN470-510MHz Band 1019 2.7.1 CN470-510 Preamble Format 1020 The following synchronization words SHOULD be used: 1021 1022 Modulation Sync word Preamble length LORA 0x34 8 symbols 2.7.2 CN470-510 Channel Frequencies 1023 1024 In China, this band is defined by SRRC to be used for civil metering applications. 1025 The 470 MHz ISM Band SHALL be divided into the following channel plans: 1026 • Upstream – 96 channels numbered 0 to 95 utilizing LoRa 125 kHz BW varying from 1027 DR0 to DR5, using coding rate 4/5, starting at 470.3 MHz and incrementing linearly 1028 by 200 kHz to 489.3 MHz. 1029 1030 Channel Index 6 to 38 and 45 to 77 are mainly used by China Electric 1031 Power. In the areas where these channels are used by China Electric 1032 Power, they should be disabled. 1033 1034 • Downstream – 48 channels numbered 0 to 47 utilizing LoRa 125 kHz BW varying 1035 from DR0 to DR5, using coding rate 4/5, starting at 500.3 MHz and incrementing 1036 linearly by 200 kHz to 509.7 MHz 1037 1038 96 uplink channels 48 downlink channels 470.3 489.3 500.3 509.7 1039 Figure 3: CN470-510 channel frequencies 1040 1041 The LoRaWAN can be used in the Chinese 470-510MHz band as long as 1042 • The radio device EIRP is less than 19.15dBm 1043 • The transmission never lasts more than 5000 ms. 1044 1045 1046 1047 CN470-510 end-devices SHALL be capable of operating in the 470 to 510 MHz frequency 1048 band and SHALL feature a channel data structure to store the parameters of 96 uplink 1049 channels. A channel data structure corresponds to a frequency and a set of data rates usable 1050 on this frequency. 1051 If using the over-the-air activation procedure, the end-device SHALL broadcast the JoinReq 1052 message on a random 125 kHz channel amongst the 96 uplink channels defined using DR5 1053 to DR0. 1054