BLACKPIN INC.

A method and apparatus for accessing a NR cell in a mobile communication system are provided. Method for accessing a NR cell includes receiving in a first cell, by a terminal from a base station, a Master Information Block (MIB) and a System Information Block1 (SIB1), determining, by the terminal, if the first cell is barred and performing by the terminal either a first operation group or a second operation group if the cell is barred and perform, if the first cell is not barred, a third operation group.

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.

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.

A method and apparatus to enhance paging operation to achieve network energy efficiency. The method includes receiving a system information, determining one or more PMOs and performing PDCCH monitoring for paging in the one or more PMOs. PMOs are determined based on a specific radio frame and a specific index. The specific radio frame is determined based on a second parameter in case that the second parameter is included in the system information. The specific radio frame is determined based on a first parameter in case that the second parameter is not included in the system information.

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.

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. A second in-device coexistence information is included in the second RRC message if the first RRC message includes a second information, the second in-device coexistence information includes information related to time pattern, the second information configures the terminal to report in-device coexistence information related to time pattern.

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.

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.

A method and apparatus for selecting a random access configuration is provided. The method includes receiving system information including configuration information for uplink bandwidth parts. The configuration information includes first configuration information for a random access procedure, the first configuration information including feature combination information, and second configuration information for a physical uplink shared channel (PUSCH), the second configuration information including a first power offset for selecting a random access preamble group. The method further includes selecting a random access preamble group based on the first configuration information and the first power offset, and transmitting, to the base station, an indication of the selected random access preamble group. The feature combination information includes information indicating one or more features associated with random access resource and optionally includes a second power offset. When included, the second power offset overrides the first power offset for selecting the random access preamble group.

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 and monitoring paging occasion based on the reference DRX cycle.