5G MAC timers (as defined in 3GPP)
- drx-onDurationTimer
- drx-InactivityTimer
- ra-ContentionResolutionTimer
- sCellDeactivationTimer
- timeAlignmentTimer
- ra-ResponseWindow
- sr-ProhibitTimer
- periodicBSR-Timer
- retxBSR-Timer
- dataInactivityTimer
- phr-PeriodicTimer
- phr-ProhibitTimer
- bwp-InactivityTimer
- beamFailureDetectionTimer
- beamFailureRecoveryTimer
Read more details 
: https://www.linkedin.com/pulse/5g-mac-timers-manje-gowda-k-r-%3F/