Section: 5.4.3.4 Successful completion of the mobility from NR
Content: Upon successfully completing the handover, at the source side the UE shall: 1> reset MAC; 1> stop all timers that are running except T325, T330 and T400; 1> release ran-NotificationAreaInfo, if stored; 1> release the AS security context including the KRRCenc key, the KRRCint key, the KUPint key and the KUPenc key, if stored; 1> release all radio resources, including release of the RLC entity and the MAC configuration; 1> release the associated PDCP entity and SDAP entity for all established RBs; NOTE : PDCP and SDAP configured by the source RAT prior to the handover that are reconfigured and re-used by target RAT when delta signalling (i.e., during inter-RAT intra-system handover when fullConfig is not present) is used, are not released as part of this procedure. 1> if the UE was configured with successHO-Config when connected to the source PCell and the targetRAT-Type is set to eutra: 2> perform the actions for the successful handover report determination as specified in clause 5.7.10.6. 1> if the targetRAT-Type is set to eutra and the nas-SecurityParamFromNR is included: or 1> if the targetRAT-Type is set to utra-fdd: 2> indicate the release of the RRC connection to upper layers together with the release cause 'other'.