Section: 5.3.5.5 Cell Group configuration 5.3.5.5.1 General
Content: The network configures the UE with Master Cell Group (MCG), and zero or one Secondary Cell Group (SCG). In (NG)EN-DC, the MCG is configured as specified in TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [10], and for NE-DC, the SCG is configured as specified in TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [10]. The network provides the configuration parameters for a cell group in the CellGroupConfig IE. The UE performs the following actions based on a received CellGroupConfig IE: 1> if the CellGroupConfig contains the spCellConfig with reconfigurationWithSync: 2> perform Reconfiguration with sync according to 5.3.5.5.2; 2> resume all suspended radio bearers except the SRBs for the source cell group, and resume SCG transmission for all radio bearers, and resume BH RLC channels and resume SCG transmission for BH RLC channels for IAB-MT, if suspended; NOTE 1: If the SCG is deactivated, resuming SCG transmission for all radio bearers does not imply that PDCP PDUs can be transmitted or received on SCG RLC bearers. 1> if the CellGroupConfig contains the rlc-BearerToReleaseList or rlc-BearerToReleaseListExt: 2> perform RLC bearer release as specified in 5.3.5.5.3; 1> if the CellGroupConfig contains the rlc-BearerToAddModList: 2> perform the RLC bearer addition/modification as specified in 5.3.5.5.4; 1> if the CellGroupConfig contains the mac-CellGroupConfig: 2> configure the MAC entity of this cell group as specified in 5.3.5.5.5; 1> if the CellGroupConfig contains the sCellToReleaseList: 2> perform SCell release as specified in 5.3.5.5.8; 1> if the CellGroupConfig contains the spCellConfig: 2> configure the SpCell as specified in 5.3.5.5.7; 1> if the CellGroupConfig contains the sCellToAddModList: 2> perform SCell addition/modification as specified in 5.3.5.5.9; 1> if the CellGroupConfig contains the bh-RLC-ChannelToReleaseList: 2> perform BH RLC channel release as specified in 5.3.5.5.10; 1> if the CellGroupConfig contains the bh-RLC-ChannelToAddModList: 2> perform the BH RLC channel addition/modification as specified in 5.3.5.5.11; 1> if the CellGroupConfig contains the uu-RelayRLC-ChannelToReleaseList: 2> perform Uu Relay RLC channel release as specified in 5.3.5.5.12; 1> if the CellGroupConfig contains the uu-RelayRLC-ChannelToAddModList: 2> perform the Uu Relay RLC channel addition/modification as specified in 5.3.5.5.13; 1> if the CellGroupConfig contains the ncr-FwdConfig: 2> perform the NCR-Fwd configuration as specified in 5.3.5.5.14; 1> if the CellGroupConfig contains the autonomousDenialParameters: 2> consider itself to be allowed to deny any transmission in a particular UL slot if during the number of slots indicated by autonomousDenialValidity, preceding and including this particular slot, it autonomously denied fewer UL slots than indicated by autonomousDenialSlots within the same cell group; NOTE 2: When counting the number of denied UL slots, the UE sums up the denied UL slots across all serving cells within the same cell group. When counting the number of slots indicated by autonomousDenialValidity, the UE sums up the UL slots across all serving cells within the same cell group. NOTE 3: When multiple denied UL slots across all serving cells partially or fully overlap in the time domain, the number of denied UL slots across all serving cells is counted as one denied UL slot, based on the longest slot.