# US 11,451,359 B2 · Secondary cell activation in new radio system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,359 B2 - Document ID: US11451359B2 - Status: Granted - Kind: B2 - Application number: 17/021,726 - Filed: 2020-09-15 - Published: 2021-04-15 - Granted: 2022-09-20 - Earliest claimed: 2019-10-15 - Assignees: Mediatek Inc. - Applicants: Mediatek Inc. - Inventors: Hsuan-Li Lin - Web page: https://patentgrep.com/patent/US11451359B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 48/16: Discovering, processing access restriction or access information - H04B 7/0696: {Determining beam pairs} - H04L 1/0026: {Transmission of channel quality indication} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0057: {Physical resource allocation for CQI} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/088: {using beam selection} - H04L 1/0027: {Scheduling of signalling, e.g. occurrence thereof} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract A method of activating a secondary cell (SCell) can include receiving on a primary cell (PCell) at a user equipment (UE) a first medium access control (MAC) control element (CE) for activating the SCell, receiving on the PCell a second MAC CE for indicating a first transmission configuration indication (TCI) state for receiving one of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) of the SCell, starting to perform a time-frequency tracking process in the SCell based on a synchronization signal block (SSB) indicated in the first TCI state without waiting for an arrival of a third MAC CE on the PCell for activating a semi-persistent (SP) channel state information reference signal (CSI-RS) resource set of the SCell, and performing a CSI reporting process based on the SP CSI-RS resource set activated by the third MAC CE on the SCell. ## Claims ### Claim 1 A method, comprising: receiving on a primary cell (PCell) at a user equipment (UE) a first medium access control (MAC) control element (CE) for activating a secondary cell (SCell); receiving on the PCell a second MAC CE for indicating a first transmission configuration indication (TCI) state for receiving one of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) of the SCell; starting to perform a time-frequency tracking process in the SCell based on a synchronization signal block (SSB) indicated in the first TCI state without waiting for an arrival of a third MAC CE on the PCell for activating a semi-persistent (SP) channel state information reference signal (CSI-RS) resource set of the SCell; performing a channel state information (CSI) reporting process based on the SP CSI-RS resource set activated by the third MAC CE on the SCell; and transmitting a measurement report indicating reference signal received power (RSRP) measurements associated with SSBs of the SCell before receiving the first MAC CE for activating the SCell. ### Claim 2 (depends on 1) The method of claim 1, wherein the first MAC CE for activating the SCell is received in slot n, and a CSI report of the CSI reporting process is transmitted no later than in slot n + T H ⁢ A ⁢ R ⁢ Q + T activation ⁢ ⁢ _ ⁢ ⁢ time + T CSI ⁢ ⁢ _ ⁢ ⁢ reporting New ⁢ ⁢ Radio ⁢ ⁢ ( NR ) ⁢ ⁢ slot ⁢ ⁢ length , where: THARQ denotes a delay between a downlink data transmission associated with the first MAC CE and a corresponding hybrid automatic repeat request (HARQ) acknowledgement, TCSI_reporting denotes a delay including an uncertainty period in acquiring a first available downlink CSI resource during the CSI reporting process, processing time for the CSI report, and an uncertainty period in acquiring a first available CSI reporting resource, and Tactivation_time denotes an activation delay that is TMAC_CE+max(Tuncertainty_MAC+TFineTime+TSSB,Tuncertainty_SP), where, TMAC_CE denotes a delay including MAC CE parsing and applying time, Tuncertainty_MAC denotes a period between a reception of the first MAC CE and a reception of a last one of the second MAC CE and a fourth MAC CE for indicating a TCI state for receiving the other one of the PDCCH and the PDSCH of the SCell, TFineTime denotes a period between the UE completing processing of the last one of the second MAC CE and the fourth MAC CE, and a timing of the SSB indicated in the first TCI state, TSSB denotes a period for processing a received signal of the SSB indicated in the first TCI state, and Tuncertainty_SP denotes a period between the reception of the first MAC CE and a reception of the third MAC CE. ### Claim 3 (depends on 2) The method of claim 2, wherein Tactivation_time is 3 ms+max(Tuncertainty_MAC+TFineTime+2 ms,Tuncertainty_SP). ### Claim 4 (depends on 1) The method of claim 1, wherein the PCell is a primary cell of a primary cell group (PCG), or a primary cell of a secondary cell group (SCG). ### Claim 5 An apparatus, comprising circuitry configured to: receive on a primary cell (PCell) at a user equipment (UE) a first medium access control (MAC) control element (CE) for activating a secondary cell (SCell); receive on the PCell a second MAC CE for indicating a first transmission configuration indication (TCI) state for receiving one of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) of the SCell; start to perform a time-frequency tracking process in the SCell based on a synchronization signal block (SSB) indicated in the first TCI state without waiting for an arrival of a third MAC CE on the PCell for activating a semi-persistent (SP) channel state information reference signal (CSI-RS) resource set of the SCell; perform a channel state information (CSI) reporting process based on the SP CSI-RS resource set activated by the third MAC CE on the SCell; and transmit a measurement report indicating reference signal received power (RSRP) measurements associated with SSBs of the SCell before receiving the first MAC CE for activating the SCell. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the first MAC CE for activating the SCell is received in slot n, and a CSI report of the CSI reporting process is transmitted no later than in slot n + T H ⁢ A ⁢ R ⁢ Q + T activation ⁢ ⁢ _ ⁢ ⁢ time + T CSI ⁢ ⁢ _ ⁢ ⁢ reporting New ⁢ ⁢ Radio ⁢ ⁢ ( NR ) ⁢ ⁢ slot ⁢ ⁢ length , where: THARQ denotes a delay between a downlink data transmission associated with the first MAC CE and a corresponding hybrid automatic repeat request (HARQ) acknowledgement, TCSI_reporting denotes a delay including an uncertainty period in acquiring a first available downlink CSI resource during the CSI reporting process, processing time for the CSI report, and an uncertainty period in acquiring a first available CSI reporting resource, and Tactivation_time denotes an activation delay that is TMAC_CE+max(Tuncertainty_MAC+TFineTime+TSSB,Tuncertainty_SP), where, TMAC_CE denotes a delay including MAC CE parsing and applying time, Tuncertainty_MAC denotes a period between a reception of the first MAC CE and a reception of a last one of the second MAC CE and a fourth MAC CE for indicating a TCI state for receiving the other one of the PDCCH and the PDSCH of the SCell, TFineTime denotes a period between the UE completing processing of the last one of the second MAC CE and the fourth MAC CE, and a timing of the SSB indicated in the first TCI state, TSSB denotes a period for processing a received signal of the SSB indicated in the first TCI state, and Tuncertainty_SP denotes a period between the reception of the first MAC CE and a reception of the third MAC CE. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein Tactivation_time is 3 ms+max(Tuncertainty_MAC+TFineTime+2 ms,Tuncertainty_SP). ### Claim 8 (depends on 5) The apparatus of claim 5, wherein the PCell is a primary cell of a primary cell group (PCG), or a primary cell of a secondary cell group (SCG). ### Claim 9 A method, comprising: receiving on a primary cell (PCell) at a user equipment (UE) a first medium access control (MAC) control element (CE) for activating a secondary cell (SCell); receiving on the PCell a second MAC CE for indicating a first transmission configuration indication (TCI) state for receiving one of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) of the SCell; starting to perform a time-frequency tracking process in the SCell based on a synchronization signal block (SSB) indicated in the first TCI state without waiting for an arrival of a third MAC CE on the PCell for activating a semi-persistent (SP) channel state information reference signal (CSI-RS) resource set of the SCell; performing a channel state information (CSI) reporting process based on the SP CSI-RS resource set activated by the third MAC CE on the SCell; and transmitting an RSRP measurement report indicating reference signal received power (RSRP) measurements associated with SSBs of the SCell after receiving the first MAC CE for activating the SCell. ### Claim 10 (depends on 9) The method of claim 9, wherein the first MAC CE for activating the SCell is received in slot n, and a CSI report of the CSI reporting process is transmitted no later than in slot n + T H ⁢ A ⁢ R ⁢ Q + T activation ⁢ ⁢ _ ⁢ ⁢ time + T CSI ⁢ ⁢ _ ⁢ ⁢ reporting New ⁢ ⁢ Radio ⁢ ⁢ ( NR ) ⁢ ⁢ slot ⁢ ⁢ length , where: THARQ denotes a delay between a downlink data transmission associated and a corresponding hybrid automatic repeat request (HARQ) acknowledgement, TCSI_reporting denotes a delay including an uncertainty period in acquiring a first available downlink CSI resource during the CSI reporting process, processing time for the CSI report, and an uncertainty period in acquiring a first available CSI reporting resource, and Tactivation_time is an activation delay that is 2*TMAC_CE+Tcell identification with Rx training+TL1-RSRP, measure+TL1-RSRP, report+THARQ+max(Tuncertainty_MAC+TFineTiming+TSSB,Tuncertainty_SP), where, Tcell identification with Rx training is the time for cell identification with Rx beam training, TL1-RSRP, measure is an L1-RSRP measurement time associated with the RSRP measurement report, TL1-RSRP, report is a delay of CSI reporting for the RSRP measurement report, TMAC_CE denotes a delay including MAC CE parsing and applying time, Tuncertainty_MAC denotes a period between a transmission of the RSRP measurement report and a reception of a last one of the second MAC CE and a fourth MAC CE for indicating a TCI state for receiving the other one of the PDCCH and the PDSCH of the SCell, TFineTime denotes a period between the UE completing processing of the last one of the second MAC CE and the fourth MAC CE, and a timing of the SSB indicated in the first TCI state, TSSB denotes a period for processing a received signal of the SSB indicated in the first TCI state, and Tuncertainty_SP denotes a period between a transmission of the RSRP measurement report and a reception of the third MAC CE. ### Claim 11 (depends on 10) The method of claim 10, wherein Tactivation_time is 6 ms+Tcell identification with Rx training+TL1-RSRP, measure+TL1-RSRP, report+THARQ+max(Tuncertainty_MAC+TFineTiming+2 ms,Tuncertainty_SP). ### Claim 12 An apparatus, comprising circuitry configured to: receive on a primary cell (PCell) at a user equipment (UE) a first medium access control (MAC) control element (CE) for activating a secondary cell (SCell); receive on the PCell a second MAC CE for indicating a first transmission configuration indication (TCI) state for receiving one of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) of the SCell; start to perform a time-frequency tracking process in the SCell based on a synchronization signal block (SSB) indicated in the first TCI state without waiting for an arrival of a third MAC CE on the PCell for activating a semi-persistent (SP) channel state information reference signal (CSI-RS) resource set of the SCell; perform a channel state information (CSI) reporting process based on the SP CSI-RS resource set activated by the third MAC CE on the SCell; and transmit an RSRP measurement report indicating reference signal received power (RSRP) measurements associated with SSBs of the SCell after receiving the first MAC CE for activating the SCell. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the first MAC CE for activating the SCell is received in slot n, and a CSI report of the CSI reporting process is transmitted no later than in slot n + T H ⁢ A ⁢ R ⁢ Q + T activation ⁢ ⁢ _ ⁢ ⁢ time + T CSI ⁢ ⁢ _ ⁢ ⁢ reporting New ⁢ ⁢ Radio ⁢ ⁢ ( NR ) ⁢ ⁢ slot ⁢ ⁢ length , where: THARQ denotes a delay between a downlink data transmission associated and a corresponding hybrid automatic repeat request (HARQ) acknowledgement, TCSI_reporting denotes a delay including an uncertainty period in acquiring a first available downlink CSI resource during the CSI reporting process, processing time for the CSI report, and an uncertainty period in acquiring a first available CSI reporting resource, and Tactivation_time is an activation delay that is 2*TMAC_CE+Tcell identification with Rx training+TL1-RSRP, measure+TL1-RSRP, report+THARQ+max(Tuncertainty_MAC+TFineTiming+TSSB,Tuncertainty_SP), where, Tcell identification with Rx training is the time for cell identification with Rx beam training, TL1-RSRP, measure is an L1-RSRP measurement delay associated with the RSRP measurement report, TL1-RSRP, report is a delay of CSI reporting for the RSRP measurement report, TMAC_CE denotes a delay including MAC CE parsing and applying time, Tuncertainty_MAC denotes a period between a transmission of the RSRP measurement report and a reception of a last one of the second MAC CE and a fourth MAC CE for indicating a TCI state for receiving the other one of the PDCCH and the PDSCH of the SCell, TFineTime denotes a period between the UE completing processing of the last one of the second MAC CE and the fourth MAC CE, and a timing of the SSB indicated in the first TCI state, TSSB denotes a period for processing a received signal of the SSB indicated in the first TCI state, and Tuncertainty_SP denotes a period between a transmission of the RSRP measurement report and a reception of the third MAC CE. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein Tactivation_time is 6 ms+Tcell identification with Rx training+TL1-RSRP, measure+TL1-RSRP, report+THARQ+max(Tuncertainty_MAC+TFineTiming+2 ms,Tuncertainty_SP).