Whenever Upper layers trigger reconfiguration for MAC layer, following actions are taken:
- Upon addition of SCell (Secondary Cell) in case of Carrier aggregation, initialize the corresponding HARQ entity.
- Upon removal of SCell (Secondary Cell), remove the corresponding HARQ entity.
- For timers apply the new value when the timer is (re)started.
- When counters are initialized apply the new maximum parameter value.
- For other parameters, apply immediately the configurations received from upper layers.