Method and apparatus for supporting carrier aggregation in wireless communication system

1. A method performed by a user equipment (UE), the method comprising:

receiving a message including measIdleConfig;

performing measurement in an idle mode or an inactive mode, based on the measIdleConfig;

receiving a UEInformationRequest message for requesting a result of the measurement; and

transmitting a UEInformationResponse message including the result of the measurement,

wherein the message includes a radio resource control (RRC) release message or system information,

wherein the measIdleConfig includes measIdleCarrierListEUTRA and measIdleCarrierListNR including information on at least one measIdleCarrier,

wherein the information includes reportQuantities associated with the at least one measIdleCarrier,

wherein the measIdleConfig includes an indicator (includeBeamMeasurements) indicating whether to include a beam measurement result.

2. The method of claim 1 , wherein the result of the measurement includes a measurement result of a serving cell and a result of measurement with respect to each of one or more frequency carriers, and the result of the measurement with respect to each of one or more frequency carriers comprises a measurement result of one or more cells.

3. The method of claim 1 , wherein the measIdleConfig includes at least one of an indicator (reportQuantityRsIndexes) indicating whether the UE reports a measurement result for each reference signal (RS) index with a reference signal received power (RSRP) or a reference signal received quality (RSRQ or with both of the RSRP and the RSRQ, or an indicator (maxNrofRS-IndexesToReport) indicating how many measurement results at maximum from among the measurement results for the RS indexes the UE reports.

4. The method of claim 1 , wherein the measIdleConfig includes at least one of information (nrofSS-BlocksToAverage) about a number of synchronization signal blocks that are used to derive a cell measurement value, a threshold (absThreshSS-BlocsConsolidation) that is used to consolidate measurement values of the synchronization signal blocks, measurement timing configuration information (smtc), a sub-carrier spacing between the synchronization signal blocks (ssbSubcarrierSpacing), or timing information (deriveSSB-IndexFromCell) that is used to determine indexes of the synchronization signal blocks.

5. The method of claim 1 , wherein the measIdleConfig comprises at least one of information (measIdleDuration) about a duration while the UE performs measurement, cell list information (measCellList) of a list of cells that are to be measured by the UE, or information (quantityThreshold) about a threshold based on which the UE determines whether to report the result of the measurement.

6. The method of claim 5 , further comprising:

transmitting an RRCResumeRequest message; and

receiving an RRCConnectionReject message,

wherein, when the RRCConnectionReject message includes waitTime, the UE continuously performs measurement in the idle mode until a timer operating according to the information (measIdleDuration) expires.

7. A method performed by a base station, the method comprising:

transmitting a message including measIdleConfig;

transmitting a UEInformationRequest message for requesting a result of measurement; and

receiving a UEInformationResponse message including the result of the measurement,

wherein the includes a radio resource control (RRC) Release message or system information,

wherein the measIdleConfig includes measIdleCarrierListEUTRA and measIdleCarrierListNR including information on at least one measIdleCarrier,

wherein the information includes reportQuantities associated with the at least one measIdleCarrier,

wherein the measIdleConfig includes an indicator (includeBeamMeasurements) indicating whether to include a beam measurement result.

8. The method of claim 7 , wherein the measIdleConfig at least one of an indicator (reportQuantityRsIndexes) indicating whether the UE reports a measurement result for each reference signal (RS) index with a reference signal received power (RSRP) or reference signal received quality (RSRQ), an indicator (maxNrofRS-IndexesToReport) indicating how many measurement results at maximum from among the measurement results for the RS indexes the UE reports.

9. The method of claim 7 , wherein the measIdleConfig includes at least one of information (nrofSS-BlocksToAverage) about a number of synchronization signal blocks that are used to derive a cell measurement value, a threshold (absThreshSS-BlocsConsolidation) that is used to consolidate measurement values of the synchronization signal blocks, measurement timing configuration information (smtc), a sub-carrier spacing between the synchronization signal blocks (ssbSubcarrierSpacing), or timing information (deriveSSB-IndexFromCell) that is used to determine indexes of the synchronization signal blocks.

10. A user equipment (UE) in a wireless communication system, the UE comprising:

a transceiver; and

a processor coupled to the transceiver and configured to:

receive a message including measIdleConfig,

perform measurement in an idle mode or an inactive mode, based on the measIdleConfig,

receive a UEInformationRequest message for requesting a result of the measurement, and

transmit a UEInformationResponse message including the result of the measurement,

wherein the message includes a radio resource control (RRC) release message or system information,

wherein the measIdleConfig includes measIdleCarrierListEUTRA and measIdleCarrierListNR including information on at least one measIdleCarrier,

wherein the information includes reportQuantities associated with the at least one measIdleCarrier,

wherein the measIdleConfig includes an indicator (includeBeamMeasurements) indicating whether to include a beam measurement result.

11. The UE of claim 10 , wherein the result of the measurement includes a measurement result of a serving cell and a result of measurement with respect to each of one or more frequency carriers, and the result of the measurement with respect to each of one or more frequency carriers comprises a measurement result of one or more cells.

12. The UE of claim 10 , wherein the measIdleConfig includes at least one of an indicator (reportQuantityRsIndexes) indicating whether the UE reports a measurement result for each reference signal (RS) index with RSRP, or an indicator (maxNrofRS-IndexesToReport) indicating how many measurement results at maximum from among the measurement results for the RS indexes the UE reports.

13. The UE of claim 10 , wherein the measIdleConfig includes at least one of information (nrofSS-BlocksToAverage) about a number of synchronization signal blocks that are used to derive a cell measurement value, a threshold (absThreshSS-BlocsConsolidation) that is used to consolidate measurement values of the synchronization signal blocks, measurement timing configuration information (smtc), a sub-carrier spacing between the synchronization signal blocks (ssbSubcarrierSpacing), or timing information (deriveSSB-IndexFromCell) that is used to determine indexes of the synchronization signal blocks.

14. The UE of claim 10 , wherein the measIdleConfig includes at least one of information (measIdleDuration) about a duration while the UE performs measurement, cell list information (measCellList) of a list of cells that are to be measured by the UE, or information (quantityThreshold) about a threshold based on which the UE determines whether to report the result of the measurement.

15. The UE of claim 14 , wherein the processor is further configured to transmit an RRCResumeRequest message and receive an RRCConnectionReject message, and, when the RRCConnectionReject message includes waitTime, the UE continuously performs measurement in the idle mode or the inactive mode until a timer operating according to the information (measIdleDuration) expires.

16. A base station for supporting idle mode measurement, the base station comprising:

a transceiver; and

a processor coupled to the transceiver and configured to:

transmit a message including measIdleConfig,

transmit a UEInformationRequest message for requesting a result of measurement, and

receive a UEInformationResponse message including the result of the measurement,

wherein the measurement is performed in an idle mode or an inactive mode,

wherein the message includes a radio resource control (RRC) Release message or system information

wherein the measIdleConfig includes measIdleCarrierListEUTRA and measIdleCarrierListNR including information on at least one measIdleCarrier,

wherein the information includes reportQuantities associated with the at least one measIdleCarrier,

wherein the measIdleConfig includes an indicator (includeBeamMeasurements) indicating whether to include a beam measurement result.

17. The base station of claim 16 , wherein the measIdleConfig includes at least one of an indicator (reportQuantityRsIndexes) indicating whether the UE reports a measurement result for each reference signal (RS) index with a reference signal received power (RSRP) or a reference signal received quality £RSRQ), an indicator (maxNrofRS-IndexesToReport) indicating how many measurement results at maximum from among the measurement results for the RS indexes the UE reports.

18. The base station of claim 16 , wherein the measIdleConfig includes at least one of information (nrofSS-BlocksToAverage) about a number of synchronization signal blocks that are used to derive a cell measurement value, a threshold (absThreshSS-BlocsConsolidation) that is used to consolidate measurement values of the synchronization signal blocks, measurement timing configuration information (smtc), a sub-carrier spacing between the synchronization signal blocks (ssbSubcarrierSpacing), or timing information (deriveSSB-IndexFromCell) that is used to determine indexes of the synchronization signal blocks.