Issue link: https://read.uberflip.com/i/1540208
Regional Parameters RP002-1.0.5 ©2022-2025 LoRa Alliance ® Page 31 of 116 The authors reserve the right to change specifications without notice. ChMaskCntl. For dynamic channel plans, the mapping of Channel- 531 ID to ChMask in LinkADRReq or ChIndex in NewChannelReq, 532 depends on the number of default channels and number of channels 533 created by the CFList. 534 535 End-devices SHALL silently ignore bits set for channels not defined for the channel plan they 536 are operating under. End-devices SHALL silently ignore bits sets for channels that refer to 537 frequencies not available for use in the regulatory region the end-device is currently operating 538 in. If no bits are set in the CFList ChMaskGrp fields, the end-device SHALL operate on all 539 default channels. 540 541 542 Size (bytes) [2] [2] [2] [2] [2] [2] [3] [1] CFList ChMask Grp0 ChMask Grp1 ChMask Grp2 ChMask Grp3 ChMask Grp4 ChMask Grp5 RFU CFList Type Note: For dynamic channel plans, CFList Type 0 and Type 1 both create 543 new channels. Type 1 can create more channels thanks to a more 544 compact description of the additional channels (enumeration vs exact 545 frequencies). In both cases, default channels are not modified with the 546 CFList. Default channels may be disabled with LinkADRReq or 547 modified with NewChannelReq. 548 3.3.1.1 800 MHz Fixed Channel List Definition 549 The 800 MHz fixed channel list defines 40 channels that MAY be created. Channel-ID 0 is 550 863.1 MHz; channels increase at 200 kHz spacing to Channel-ID 34 at 869.9 MHz. Five 551 additional channels, identified as 35 to 39, are defined at 865.0625 MHz, 865.4025 MHz, 552 865.6025 MHz, 865.785 MHz, and 865.985 MHz respectively. ChMask3, ChMask4, and 553 ChMask5 are RFU. 554 555 The end-device SHALL create an additional channel at the frequency specified by the 556 Channel-ID, numbered sequentially in order of Channel-ID, starting after the last default 557 channel, for each bit set in the CFList. Each newly created channel SHALL be enabled for use 558 with DR0 to DR5 125 kHz modulation. 559 560 These channel definitions represent a superset of common channels in widespread use in 561 EU868, IN865, and RU864. 562 Example: If an end-device uses channel plan EU868, supports CFList 563 Type 1, and receives it equal to 0x0100_A010_0000_0000_0000_0000, 564 then ChMaskGrp0 = 0x0100 and ChMaskGrp1=0xA010. Four bits are 565 set, which correspond to valid channels, so the end-device will create 566 four channels. EU868 has three default channels, so the first created 567 channel will be for ChIndex=3. The end-device will create ChIndex=3 568 at center frequency 863.1MHz, ChIndex=4 at center frequency 569 863.1+21*0.2 = 867.3MHz, ChIndex=5 at center frequency 570 863.1+23*0.2 = 867.7MHz, and ChIndex=6 at center frequency 571 863.1+28*0.2 = 868.7MHz. 572 Note: The frequencies of the three EU868 default channels correspond 573 to ChMaskGrp1 = 0x000E. Setting these bits would create new 574 channels at the same frequency as default channels. 575