private static uint CalculateRXWindowsTime(uint windowTime, RxDelay rxDelay)
 {
     // RxDelay follows specification of RXTimingSetupReq and the delay
     // | rXDelay | Delay |
     // ===================
     // |    0    |   1   |
     // |    1    |   1   |
     // |    2    |   2   |
     // |    3    |   3   |
     return((uint)(Enum.IsDefined(rxDelay) ? windowTime + rxDelay.ToSeconds() - 1 : windowTime));
 }