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LoRaWAN® Regional Parameters RP002-1.0.4 ©2022 LoRa Alliance ® Page 37 of 101 The authors reserve the right to change specifications without notice. 2.5 US902-928 MHz ISM Band 648 This section defines the regional parameters for the USA, Canada, and all other countries in 649 ITU Region 2 adopting the entire FCC 47 CFR Part 15 regulations in the 902-928 ISM band. 650 2.5.1 US902-928 Preamble Format 651 Refer to Section 4, "Physical Layer". 652 2.5.2 US902-928 Band Channel Frequencies 653 The 915 MHz ISM band SHALL be divided into the following channel plans: 654 • Upstream – 64 channels, numbered 0 to 63, utilizing LoRa 125 kHz BW, varying from 655 DR0 to DR3, using coding rate 4/5, starting at 902.3 MHz and incrementing linearly by 656 200 kHz to 914.9 MHz 657 • Upstream – 8 channels, numbered 64 to 71, utilizing LoRa 500 kHz BW at DR4 or LR- 658 FHSS 1.523 MHz BW at DR5-DR6, starting at 903.0 MHz and incrementing linearly by 659 1.6 MHz to 914.2 MHz 660 • Downstream – 8 channels, numbered 0 to 7, utilizing LoRa 500 kHz BW at DR8 to 661 DR13, starting at 923.3 MHz and incrementing linearly by 600 kHz to 927.5 MHz 662 663 664 Figure 1: US902-928 channel frequencies 665 915 MHz ISM band end-devices are required to operate in compliance with the relevant 666 regulatory specifications; the following note summarizes some of the current (as of the date 667 of publication of this document) relevant regulations. 668 Frequency-Hopping, Spread-Spectrum (FHSS) mode, which requires 669 the device to transmit at a measured conducted power level no greater 670 than +30 dBm, for a period of no more than 400 msec, and over at least 671 50 channels, each of which occupy no greater than 250 kHz of 672 bandwidth and separated by a minimum of 25 kHz or the 20 dB 673 bandwidth of the hopping channel, whichever is greater. 674 Digital Transmission System (DTS) mode, which requires that the 675 device use channels greater than or equal to 500 kHz and comply to a 676 conducted Power Spectral Density measurement of no more than +8 677 dBm per 3 kHz of spectrum. In practice, this limits the conducted output 678 power of an end-device to +26 dBm. 679 Hybrid mode, which requires that the device transmit over multiple 680 channels (this may be less than the 50 channels required for FHSS 681 mode but is recommended to be at least 4) while complying with the 682 Power Spectral Density requirements of DTS mode and the 400 msec 683 dwell time of FHSS mode. In practice, this limits the measured 684 conducted power of the end-device to 21 dBm. 685 903.0 902.3 904.6 914.2 …. 923.3 923.9 927.5 …. 8x downlink channels 64 + 8 uplink channels

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