LoRaWAN® Regional Parameters v1.0.3revA

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LoRaWAN 1.0.3 Regional Parameters ©2018 LoRa™ Alliance Page 30 of 71 The authors reserve the right to change specifications without notice. Table 24 : CN779-787 maximum payload size (not repeater compatible) 679 2.4.7 CN779-787 Receive windows 680 The RX1 receive window uses the same channel than the preceding uplink. The data rate is 681 a function of the uplink data rate and the RX1DROffset as given by the following table. The 682 allowed values for RX1DROffset are in the [0:5] range. Values in the range [6:7] are reserved 683 for future use 684 685 RX1DROffset 0 1 2 3 4 5 Upstream data rate Downstream data rate in RX1 slot 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 DR6 DR6 DR5 DR4 DR3 DR2 DR1 DR7 DR7 DR6 DR5 DR4 DR3 DR2 Table 25: CN779-787 downlink RX1 data rate mapping 686 The RX2 receive window uses a fixed frequency and data rate. The default parameters are 687 786 MHz / DR0. 688 2.4.8 CN779-787 Class B beacon and default downlink channel 689 The beacons SHALL be transmitted using the following settings 690 DR 3 Corresponds to SF9 spreading factor with 125 kHz BW CR 1 Coding rate = 4/5 Signal polarity Non-inverted As opposed to normal downlink traffic which uses inverted signal polarity Table 26: CN779-787 beacon settings 691 The beacon frame content is: 692 Size (bytes) 2 4 2 7 2 BCNPayload RFU Time CRC GwSpecific CRC The beacon default broadcast frequency is 785MHz. 693 The class B default downlink pingSlot frequency is 785MHz 694 695 2.4.9 CN779-787 Default Settings 696 The following parameters are recommended values for the CN779-787MHz band. 697 RECEIVE_DELAY1 1 s 698 RECEIVE_DELAY2 2 s (MUST be RECEIVE_DELAY1 + 1s) 699 JOIN_ACCEPT_DELAY1 5 s 700 JOIN_ACCEPT_DELAY2 6 s 701 MAX_FCNT_GAP 16384 702 ADR_ACK_LIMIT 64 703 ADR_ACK_DELAY 32 704

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