The Channel Plan ID selects a standardized channel plan within the regional regulatory domain.

The plan defines:

  • Channel list and spacing.

  • Center frequencies.

  • Channel hopping function and parameters (dwell time, hop sequence).

  • Compliance constraints (maximum transmit power, duty cycle limits, listen before talk behavior).

Determines the following attributes:

  • Frequency range.

  • Channel spacing.

  • First and last channel numbers.

All devices in a Personal Area Network (PAN) must use the same Channel Plan ID to guarantee that advertisement, discovery, and data frames occur on the same set of frequencies and at the same hopping cadence.

If the Channel Plan ID does not match, the node will scan the wrong frequencies or follow a different hop sequence and will not hear the border router.

This command is used to Configure the PHY layer.

Considerations

  • More channels: Improves coexistence and resilience but can increase discovery time because the node must scan a larger set.

  • Fewer channels: Reduces join time but may suffer more from interference and may have tighter regulatory limits.