Document

LoRaWAN Regional Parameters ©2016 LoRa™ Alliance Page 39 of 45 The authors reserve the right to change specifications without notice. 922.7 125 14 23 922.9 125 14 23 923.1 125 14 23 923.3 125 14 23 Table 47: Center frequency, bandwidth, maximum EIRP output power table 1 The three following default channels (922.1, 922.3 and 922.5MHz / DR0 to DR5) determined 2 by the network operator from the set of available channels as defined by the South Korean 3 regulation must be implemented in every KR920-923MHz end-device, and cannot be 4 alterable by the NewChannelReq command. Those channels are the minimum set that all 5 network gateways should always be listening on to guarantee a minimal common channel 6 set between end-devices and network gateways. 7 8 Modulation Bandwidth [kHz] Channel Frequency [MHz] FSK Bitrate or LoRa DR / Bitrate Nb Channels LoRa 125 922.10 922.30 922.50 DR0 to DR5 / 0.3-5 kbps 3 Table 48: KR920-923 default channels 9 In order to access the physical medium the South Korea regulations impose some 10 restrictions. The South Korea regulations allow the choice of using either a duty-cycle 11 limitation or a so-called Listen Before Talk Adaptive Frequency Agility (LBT AFA) 12 transmissions management. The current LoRaWAN specification for the KR920-923 ISM 13 band exclusively uses LBT channel access rule to maximize MACPayload size length and 14 comply with the South Korea regulations. 15 KR920-923MHz ISM band end-devices should use the following default parameters 16 Default EIRP output power for end-device(920.9~921.9MHz): 10 dBm 17 Default EIRP output power for end-device(922.1~923.3MHz): 14 dBm 18 Default EIRP output power for gateway: 23 dBm 19 KR920-923MHz end-devices should be capable of operating in the 920 to 923MHz 20 frequency band and should feature a channel data structure to store the parameters of at 21 least 16 channels. A channel data structure corresponds to a frequency and a set of data 22 rates usable on this frequency. 23 The following table gives the list of frequencies that should be used by end-devices to 24 broadcast the JoinReq message. 25 26 Modulation Bandwidth [kHz] Channel Frequency [MHz] FSK Bitrate or LoRa DR / Bitrate Nb Channels LoRa 125 922.10 922.30 922.50 DR0 to DR5 / 0.3-5 kbps 3 Table 49: KR920-923 JoinReq Channel List 27 2.8.3 KR920-923 Data Rate and End-device Output Power encoding 28 There is no dwell time limitation for the KR920-923 PHY layer. The TxParamSetupReq 29 MAC command does not have to be implemented by the KR920-923 devices. 30

• Cover