Measurement objects merging for NR unlicensed spectrums
This disclosure describes techniques for NR-U MO merging in EN-DC and NR-DC embodiments, with consideration of additional parameters including different Q values and RSSI Measurement Timing Configuration (RMTC) configurations.
1. A method, performed by a user equipment (UE), for merging measurement objects (MOs) in a New Radio (NR) system including NR unlicensed (NR-U) carriers configured to provide E-UTRA-NR Dual Connectivity (EN-DC) between a licensed band LTE Primary Cell (PCell) and an NR-U Primary Secondary Cell (PSCell), the method comprising:
determining whether an E-UTRA PCell and an NR PSCell configure a same NR carrier frequency layer with clear channel assessment (CCA) to be monitored by the UE in synchronous intra-band EN-DC, wherein the NR PSCell is an NR-U PSCell with CCA and the E-UTRA PCell is a licensed band LTE PCell; and
merging MOs for the same NR carrier frequency layer configured by the NR-U PSCell with CCA and the licensed band LTE PCell by:
counting the same NR carrier frequency layer once to a total number of effective carrier frequency layers by checking that system frame numbers and slot boundaries are aligned and in response to the same NR carrier frequency layer having no differences in RSSI measurement resources, deriveSSB-IndexFromCell indications, SMTC configurations, Q values, and RSSI Measurement Timing Configuration (RMTC) configurations,
wherein the Q values indicate the Quasi-Colocation (QCL) relationship between Synchronization Signal Block (SSB) positions on a frequency indicated by ssbFrequency;
wherein for the MOs of the same NR carrier frequency layer configured by the NR-U PSCell with CCA and the licensed band LTE PCell to be merged, the RMTC and the Q values must be the same.
2. The method of claim 1 in which the Q value is represented by an SSB-PositionQCL-Relation-r16 parameter.
3. The method of claim 1 in which the Q value is represented by an SSB-PositionQCL-CellsToAddModList-r16 parameter.
4. The method of claim 1 in which the RMTC configuration is represented by an RMTC-Config-r16 parameter of an NR unlicensed carrier frequency layer.
5. A method, performed by a user equipment (UE), for merging measurement objects (MOs) in a New Radio (NR) system including NR unlicensed (NR-U) carriers configured to provide NR Dual Connectivity (NR-DC) between a licensed band NR and an NR-U, the method comprising:
determining whether an NR Primary Cell (PCell) and an NR Primary Secondary Cell (PSCell) configure a same NR carrier frequency layer with clear channel assessment (CCA) to be monitored by the UE in synchronous NR-DC, wherein the NR PSCell is an NR-UPSCell with CCA and the NR PCell is a licensed band NR PCell; and
merging MOs for the same NR carrier frequency layer configured by the NR-U PSCell with CCA and the licensed band NR PCell by:
counting the same NR carrier frequency layer once to a total number of effective carrier frequency layers by checking that system frame numbers and slot boundaries are aligned and in response to the same NR carrier frequency layer having no differences in RSSI measurement resources, deriveSSB-IndexFromCell indications, SMTC configurations, Q values, and RSSI Measurement Timing Configuration (RMTC) configurations,
wherein the Q values indicate the Quasi-Colocation (QCL) relationship between Synchronization Signal Block (SSB) positions on a frequency indicated by ssbFrequency;
wherein for the MOs of the same NR carrier frequency layer configured by the NR-UPSCell with CCA and the licensed band NR PCell to be merged, the RMTC and the Q values must be the same.
6. The method of claim 5 in which the Q value is represented by an SSB-PositionQCL-Relation-r16 parameter.
7. The method of claim 5 in which the Q value is represented by an SSB-PositionQCL-CellsToAddModList-r16 parameter.
8. The method of claim 5 in which the RMTC configuration is represented by an RMTC-Config-r16 parameter of an NR carrier frequency layer.
9. A method, performed by apparatus of a New Radio (NR) system configured to provide NR unlicensed (NR-U) carriers for E-UTRA NR Dual Connectivity (EN-DC) or dual connectivity between a licensed band LTE Primary Cell (PCell) and an NR-U Primary Secondary Cell (PSCell), for measurement object (MO) configuration of a user equipment (UE), the method comprising:
configuring an MO for the UE, wherein the MO is associated with an NR carrier frequency layer with clear channel assessment (CCA) to be monitored by the UE in synchronous intra-band EN-DC; and
determining that the MO was merged with another MO at the UE for the same NR carrier frequency layer for which the MOs system frame numbers and slot boundaries are aligned with the NR carrier frequency layer and having no differences in RSSI measurement resources, deriveSSB-IndexFromCell indications, SMTC configurations, Q values, and RSSI Measurement Timing Configuration (RMTC) configurations,
wherein the Q values indicate the Quasi-Colocation (QCL) relationship between Synchronization Signal Block (SSB) positions on a frequency indicated by ssbFrequency;
wherein for MOs of a same NR carrier frequency layer configured by the NR-UPSCell with CCA and the licensed band LTE PCell to be merged, the RMTC and the Q values must be the same.
10. The method of claim 9 , further comprising receiving a merged MO measurement result as a single MO report associated with two or more NR carrier frequency layers.
11. The method of claim 9 in which the Q value is represented by an SSB-PositionQCL-Relation-r16 parameter.
12. The method of claim 9 in which the Q value is represented by an SSB-PositionQCL-CellsToAddModList-r16 parameter.
13. The method of claim 9 in which the RMTC configuration is represented by an RMTC-Config-r16 parameter of an NR unlicensed carrier frequency layer.