First of all a heads up for folks targeting CN470-510. RP002-1.0.1 LoRaWAN Regional Parameters claims:
The transmission time shall not exceed one second and is limited to one channel at a time. For interferences mitigation, access to the physical medium requires a Listen Before Talk Adaptive Frequency Agility (LBT AFA) transmission management or other similar mechanisms like channels blacklisting.
Note: The limitation of scope to small scale networks enters into effect after November 2021. Gateways and end-devices deployed prior to December 1, 2021 are not required to comply with this restriction.
And as per the changelog:
- CN470-510 modified to reflect most recent regulatory requirements. Specifically, SF12 is no longer available and maximum payload sizes for several other datarates were modified to comply with the 1 second dwell time.
That document also describes some changes in the channels, but I’ve not compared that to earlier specifications. Also:
Note: The CN470-510 channel plan has been significantly changed from prior revisions and should be considered experimental pending published documents confirming plan compliant devices have been granted local regulatory approval.