14.2.2.4.1 Acknowledgment Timeout

If an acknowledgment (ACK) frame is expected following the frame transmission, the AT86RF212B sets a timeout for the ACK frame to arrive. This timeout macAckWaitDuration isdefined according to [2] as follows:

macAckWaitDuration [symbol periods] =

aUnitBackoffPeriod + aTurnaroundTime + phySHRDuration + 6 x phySymbolsPerOctet

where six represents the number of PHY header octets plus the number of PSDU octets in an acknowledgment frame.

Specifically for the implemented PHY Modes, this formula results in the following values:

  • BPSK: macAckWaitDuration = 120 symbol periods
  • O-QPSK: macAckWaitDuration = 54 symbol periods
Note:
  1. For any PHY Mode the unit “symbol period” refers to the symbol duration of the appropriate synchronization header; refer to the Symbol Period section for further information regarding symbol period.