Section: 5.1.3 Requirements for UE in MR-DC
Content: In this specification, the UE considers itself to be in: - EN-DC, if and only if it is configured with nr-SecondaryCellGroupConfig according to TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ] [10], and it is connected to EPC, - NGEN-DC, if and only if it is configured with nr-SecondaryCellGroupConfig according to TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ] [10], and it is connected to 5GC, - NE-DC, if and only if it is configured with mrdc-SecondaryCellGroup set to eutra-SCG, - NR-DC, if and only if it is configured with mrdc-SecondaryCellGroup set to nr-SCG, - MR-DC, if and only if it is in (NG)EN-DC, NE-DC or NR-DC. NOTE: This use of these terms deviates from the definition in TS 37.340[ Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Overall Description; Stage-2 ]  [41] and other specifications. In TS 37.340[ Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Overall Description; Stage-2 ] , these terms include also the case where the UE is configured with E-UTRA or NR MCG only (i.e. no NR or E-UTRA SCG) but with one or more bearers terminated in a secondary node (i.e. using NR PDCP). The UE in (NG)EN-DC only executes a subclause of clause 5 in this specification when the subclause: - is referred to from a subclause under execution, either in this specification or in TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [10]; or - applies to a message received on SRB3 (if SRB3 is established); or - applies to field(s), IE(s), UE variable(s) or timer(s) in this specification that the UE is configured with. When executing a subclause of clause 5 in this specification, the UE follows the requirements in clause 5.1.2 and in all subclauses of this specification applicable to the messages (including processing time requirements), fields, IEs, timers and UE variables indicated in the subclause under execution.