Abstract: A method and apparatus for enhanced discontinuous reception is provided. Method for discontinuous reception includes receiving a downlink RRC message from the base station, determining a first subframe to start the first timer based on first counter and second counter and starting the first timer based on the determination. The second counter is set to a specific value if a specific DRX parameter is present.

Abstract: A method and apparatus for radio link monitoring on primary SCG cell are provided. The method includes transmitting by a terminal a first message to report UE capability, receiving a second message by the terminal to activate or deactivate a secondary cell group and performing by the terminal radio link monitoring on primary SCG cell.

Abstract: A method and apparatus for enhanced discontinuous transmission is provided. Method for discontinuous transmission includes determining a method for determining the first subframe of the first period, determining a first period based on the determined method, transmitting a first set of uplink signals during the first period, determining a second period based on a specific event occurred in a first period and transmitting a second set of uplink signals during the second period.

Abstract: A method and apparatus for monitoring paging in a mobile communication system are provided. Method for monitoring paging includes receiving a first message including first paging cycle and second paging cycle from the AMF, receiving a second message including third paging cycle and fourth paging cycle from the base station, receiving a system information including an information related to the support of extended DRX, determining a reference DRX cycle, monitoring paging occasion based on the reference DRX cycle and receiving a paging.

Abstract: A method and apparatus for supporting XR services is provided. The method of a terminal includes receiving from a base station a Radio Resource Control (RRC) message, wherein the RRC message comprises a set of Packet Data Convergence Protocol (PDCP) parameters for a Data Radio Bearer (DRB), establishing a Data Radio Bearer (DRB) based on the set of PDCP parameters, starting a discard timer for a Service Data Unit (SDU) of the DRB and discarding one or more SDUs. In case that the discard timer expires, the terminal performs a first discard operation. In case that successful delivery of the SDU is confirmed by the PDCP status report, the terminal performs a second discard operation.

Abstract: A Method and Apparatus for discontinuous reception and discontinuous transmission are provided. The method includes transmitting a UECapabilityInformation to the GNB, receiving a RRCReconfiguration form the GNB, performing DRX operation based on the RRCReconfiguration and current-drx2-ConfigId, receiving a first MAC CE from the GNB and performing DRX operation based on the first MAC CE. The performing DRX operation comprises receiving or not receiving configured assignment based downlink transport block.

Abstract: A method and apparatus to support conditional reconfiguration is provided. Method for supporting conditional reconfiguration includes receiving from a base station a RRC reconfiguration message, receive from the base station physical layer control information related to conditional reconfiguration and applying a RRC reconfiguration message associated with a specific applicable cell based on whether the specific applicable cell is configured with a first parameter, whether the physical layer control information related to conditional reconfiguration is received, reference signal received power of the specific applicable cell and a specific bit of the physical layer control information.

Abstract: A method and apparatus for supporting XR services is provided. The method of a terminal includes receiving from a base station a Radio Resource Control (RRC) message, wherein the RRC message comprises a set of Packet Data Convergence Protocol (PDCP) parameters, establishing a PDCP entity based on the set of PDCP parameters, receiving from the base station a PDCP discard report and updating a first state variable based on the PDCP discard report. The first state variable relates to start of a reordering timer. One or more PDCP Service Data Units (SDUs) are delivered from the PDCP entity to an upper layer in case that the reordering timer expires.

Abstract: A method and apparatus for enhanced discontinuous transmission is provided. Method for discontinuous transmission includes performing uplink transmission for configured grants during a first transmission period and a second transmission period, performing uplink transmission for a first configured grants during a first transmission period and, performing uplink transmission for a second configured grants during a second transmission period based on presence of a first information. The first configured grants are configured grants that are activated in the currently activated uplink BWP. The second configured grants are configured grants that activated and configured to be transmitted during the second transmission period in the currently activated uplink BWP.

Abstract: A method and apparatus for data transfer in RRC_INACTIVE state is provided. Method for data transfer in RRC_INACTIVE state includes receiving RRC Reconfiguration message, receiving RRC Release message and triggering BSR based on the first BSR configuration and first LCGs or based on the second BSR configuration and second LCGs.

Abstract: A method may comprise receiving, from a base station, at least one Radio Resource Control (RRC) message. The at least one RRC message may comprise: first configuration information associated with at least one first cell; and second configuration information associated with at least one second cell. The method may comprise while the first configuration information and the second configuration information are configured for the wireless device: performing, based on the second configuration information, wireless communication via at least one cell of the at least one second cell; receiving a first Medium Access Control (MAC) Control Element (CE), wherein the first MAC CE comprises an identifier associated with the first configuration information; and based on the first MAC CE, performing, using at least one parameter of the first configuration information, wireless communication via at least one cell of the at least one first cell.

Abstract: A Method and Apparatus for sidelink positioning is provided. The method includes receiving a SystemInformationBlock12 in a first cell, initiating sidelink positioning in the first cell if the SystemInformationBlock12 includes a sl-PositioningAllowed field set to a first value, and performing sidelink positioning based on a sidelink positioning resource pool or based on a specific sidelink resource pool. Configuration information of the specific sidelink resource pool includes sl_Pos_Allowed field set to a first value. The SystemInformationBlock12 includes a SL-ConfigCommonNR and a SL_Pos_ConfigCommon. The SL_Pos_ConfigCommon includes a one or more Sl_Pos_ResourcePool IEs.

Abstract: A method and apparatus for layer 2 mobility is provided. Method for lower layer mobility includes transmitting the UECapabilityInformation to the base station, receiving a RRCReconfigruation from the base station, receiving a PDCCH order from the base station, transmitting a preamble to the base station based on the PDCCH order, receiving a response from the base station and determining Timing advance between downlink and uplink (TTA). If the type1 PDCCH order was received, the terminal determining TTA of a first cell based on the first field (TAC) and the subcarrier spacing for a first PUSCH transmission. The first cell is the cell where the first PDCCH order was received. If the type2 PDCCH order was received, the terminal determining TTA of a second cell based on the first field and the subcarrier spacing for the preamble transmission and the second field (CMG identifier).

Abstract: A method and apparatus for layer 2 mobility is provided. Method for lower layer mobility includes receiving from a base station a first RRC message and a second RRC message, receiving from the base station a first MAC CE, monitoring PDCCH for the first identifier and the second identifier, adjusting uplink transmission power based on TPC command in PDCCH addressed by the second identifier, performing uplink transmission based on uplink scheduling information in PDCCH addressed by the first identifier, receiving from the base station a second MAC CE, and adjusting uplink transmission power based on TPC command in PDCCH addressed by the fourth identifier, performing uplink transmission based on uplink scheduling information in PDCCH addressed by the second identifier.

Abstract: A method and apparatus for layer 2 mobility is provided. Method for lower layer mobility includes transmitting the UECapabilityInformation to the base station, receiving a RRCReconfigruation from the base station, receiving a PDCCH order from the base station and determining the transmission power of the preamble and transmitting a preamble to the base station based on the PDCCH order. If the PDCCH order is a type1 PDCCH order, preamble transmission power is determined based on a first parameter set and pathloss of a first cell. If PDCCH order is a type2 PDCCH order, preamble transmission power is determined based on a second parameter set and a first information (CMG identifier) and a second information (transmission power related information) and pathloss of a second cell.

Abstract: A method and apparatus for positioning in a mobile communication system are provided. Method for positioning includes receiving a SI, transmitting a UECapabilityInformation, transmitting a provideCapabilities, transmitting a RequestAssistanceData, receiving a ProvideAssistanceData, receiving a RRCRelease, transmitting a positioning SRS in RRC_INACTIVE state and transmitting and a ProvideLocationInformation in RRC_INACTIVE state. the ProvideAssistanceData includes a PRS data or a validity information. The UECapabilityInformation includes a capability information indicating support of SRS for positioning in RRC_INACTIVE. The provideCapabilities includes a capability information related to PRS in RRC_INACTIVE.

Abstract: A method for in-device coexistence information reporting is provided. The method includes receiving from a base station a first Radio Resource Control (RRC) message, transmitting a second RRC message, the second RRC message includes an in-device coexistence information, receiving a third RRC message, and applying a configuration based on the third RRC message. A first in-device coexistence information is included in the second RRC message if the first RRC message includes a first information, the first in-device coexistence information includes information related to frequency domain, the first information configures the terminal to report in-device coexistence information related to frequency domain.

Abstract: A Method and Apparatus for discontinuous reception and discontinuous transmission are provided. The method includes transmitting a UECapabilityInformation to the GNB, receiving a RRCReconfiguration form the GNB, performing a first DRX operation for a first cell and a third DRX operation for a second cell based on the RRCReconfiguration and current-drx2-ConfigId, receiving a first MAC CE from the GNB and performing DRX operation based on the first MAC CE. The performing DRX operation comprises receiving or not receiving downlink reference signal.

Abstract: A method and apparatus for accessing a NR cell in a mobile communication system are provided. Method for accessing a NR cell includes receiving, by a terminal from a base station, a System Information Block1, determining, by the terminal, a preamble format and a subframe and a starting symbol based on the prach-ConfigurationIndex included in the first RACH-ConfigCommon if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon and the prach-ConfigurationIndex included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon and transmitting, by the terminal, the preamble based at least in part on the preamble format and the subframe and the starting symbol.

Abstract: A method and apparatus for data transfer in RRC_INACTIVE state is provided. Method for data transfer in RRC_INACTIVE state includes transmitting a UECapabilityInformation, receiving a RRCRelease the RRC release message includes a first information for a second resume procedure, receiving a system information the system information includes a first threshold and a second threshold, initiating a second resume procedure and cancelling triggered PHR.