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LoRaWAN® Specification v1.0.3

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LoRaWAN 1.0.3 Specification ©2018 LoRa™ Alliance Page 26 of 72 The authors reserve the right to change specifications without notice. Table 7: LinkADRAns status bits signification 711 If any of those three bits equals 0, the command did not succeed and the node has kept the 712 previous state. 713 5.3 End-Device Transmit Duty Cycle (DutyCycleReq, DutyCycleAns) 714 The DutyCycleReq command is used by the network coordinator to limit the maximum 715 aggregated transmit duty cycle of an end-device. The aggregated transmit duty cycle 716 corresponds to the transmit duty cycle over all sub-bands. 717 718 Size (bytes) 1 DutyCycleReq Payload DutyCyclePL 719 Bits 7:4 3:0 DutyCyclePL RFU MaxDCycle 720 721 722 The maximum end-device transmit duty cycle allowed is: 723 = 1 2 MaxDCycle 724 The valid range for MaxDutyCycle is [0 : 15]. A value of 0 corresponds to "no duty cycle 725 limitation" except the one set by the regional regulation. 726 An end-device answers to a DutyCycleReq with a DutyCycleAns command. The 727 DutyCycleAns MAC reply does not contain any payload. 728 5.4 Receive Windows Parameters (RXParamSetupReq, 729 RXParamSetupAns) 730 The RXParamSetupReq command allows a change to the frequency and the data rate set 731 for the second receive window (RX2) following each uplink. The command also allows to 732 program an offset between the uplink and the RX1 slot downlink data rates. 733 734 Size (bytes) 1 3 RXParamSetupReq Payload DLsettings Frequency 735 Bits 7 6:4 3:0 DLsettings RFU RX1DRoffset RX2DataRate 736 The RX1DRoffset field sets the offset between the uplink data rate and the downlink data 737 rate used to communicate with the end-device on the first reception slot (RX1). As a default 738 this offset is 0. The offset is used to take into account maximum power density constraints 739 for base stations in some regions and to balance the uplink and downlink radio link margins. 740 The data rate (RX2DataRate) field defines the data rate of a downlink using the second 741 receive window following the same convention as the LinkADRReq command (0 means 742 DR0/125kHz for example). The frequency (Frequency) field corresponds to the frequency of 743 the channel used for the second receive window, whereby the frequency is coded following 744 the convention defined in the NewChannelReq command. 745

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