# US 10,772,046 B2 · Uplink power control in dual connectivity to first or second cell group based on first or second configuration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,046 B2 - Document ID: US10772046B2 - Status: Granted - Kind: B2 - Application number: 15/887,236 - Filed: 2018-02-02 - Published: 2018-06-07 - Granted: 2020-09-08 - Earliest claimed: 2014-01-22 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Daesung Hwang; Yunjung Yi; Joonkui Ahn; Suckchel Yang - Web page: https://patentgrep.com/patent/US10772046B2 ## CPC - H04W 52/146: {Uplink power control} - H04W 52/288: {taking into account the usage mode, e.g. hands-free, data transmission or telephone} - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 76/15: Setup of multiple wireless link connections - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for performing a power scaling is discussed. The method performed by a user equipment (UE) includes determining, by the UE configured with dual connectivity to a first cell group and a second cell group, a first power for transmitting a first uplink channel on a first subframe toward the first cell group; determining a second power for transmitting a second uplink channel on a second subframe toward the second cell group; and scaling down the second power for transmitting the second uplink channel if a maximum power is exceeded, wherein the first uplink channel includes a first physical random access channel (PRACH), wherein the second uplink channel includes a second PRACH, and wherein the scaling down is performed if the first subframe is overlapped with the second subframe. ## Claims ### Claim 1 A method for performing a power scaling, the method performed by a user equipment (UE) and comprising: determining, by the UE configured with dual connectivity to a first cell group and a second cell group, a first power for a first transmission of transmitting a first uplink channel in a first transmission time toward the first cell group; determining a second power for a second transmission of transmitting a second uplink channel in a second transmission time toward the second cell group; and scaling down the second power for transmitting the second uplink channel based on that a maximum power is exceeded, wherein the first uplink channel includes a first physical random access channel (PRACH), wherein the second uplink channel includes a second PRACH, wherein the scaling down is performed based on that the first transmission time in which the first uplink channel including the first PRACH is transmitted overlaps the second transmission time in which the second uplink channel including the second PRACH is transmitted, and wherein the second transmission is performed based on that the second power is scaled down by a power reduction value which is smaller than a configured value. ### Claim 2 (depends on 1) The method of claim 1, wherein the first power for transmitting the first uplink channel including the first PRACH is not scaled down. ### Claim 3 (depends on 1) The method of claim 1, wherein the first cell group corresponds to a master cell group (MCG) and the second cell group belongs corresponds to a secondary cell group (SCG). ### Claim 4 (depends on 1) The method of claim 1, further comprising: scaling down the first power for transmitting the first uplink channel based on the first power exceeding a threshold value, wherein the first uplink channel includes at least one of a first physical uplink control channel (PUCCH) or a first physical uplink shared channel (PUSCH), and wherein the at least one of the first PUCCH or the first PUSCH includes a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/negative-acknowledgement (NACK) signal. ### Claim 5 (depends on 4) The method of claim 4, wherein the at least one of the first PUCCH or the first PUSCH further includes a scheduling request (SR). ### Claim 6 (depends on 1) The method of claim 1, wherein the second uplink channel further includes at least one of a second PUCCH or a second PUSCH which include a second HARQ-ACK signal. ### Claim 7 A user equipment (UE) for performing a power scaling, the UE comprising: a reception unit configured with a dual connectivity to a first cell group and a second cell group; and a processor configured to: determine a first power for a first transmission of transmitting a first uplink channel in a first transmission time toward the first cell group; determine a second power for a second transmission of transmitting a second uplink channel in a second transmission time toward the second cell group; and scale down the second power for transmitting the second uplink channel based on that a maximum power is exceeded, wherein the first uplink channel includes a first physical random access channel (PRACH), wherein the second uplink channel includes a second PRACH, wherein the scaling down is performed based on that the first transmission time in which the first uplink channel including the first PRACH is transmitted overlaps the second transmission time in which the second uplink channel including the second PRACH is transmitted, and wherein the second transmission is performed based on that the second power is scaled down by a power reduction value which is smaller than a configured value. ### Claim 8 (depends on 7) The UE of claim 7, wherein the first power for transmitting the first uplink channel including the first PRACH is not scaled down. ### Claim 9 (depends on 7) The UE of claim 7, wherein the first cell group corresponds to a master cell group (MCG) and the second cell group belongs corresponds to a secondary cell group (SCG). ### Claim 10 (depends on 7) The UE of claim 7, wherein the processor is further configured to: scale down the first power for transmitting the first uplink channel based on the first power exceeding a threshold value, wherein the first uplink channel includes at least one of a first physical uplink control channel (PUCCH) or a first physical uplink shared channel (PUSCH), and wherein the at least one of the first PUCCH or the first PUSCH includes a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/negative-acknowledgement (NACK) signal. ### Claim 11 (depends on 10) The UE of claim 10, wherein the at least one of the first PUCCH or the first PUSCH further includes a scheduling request (SR). ### Claim 12 (depends on 7) The UE of claim 7, wherein the second uplink channel further includes at least one of a second PUCCH or a second PUSCH which include a second HARQ-ACK signal. ### Claim 13 A processing apparatus configured to control a user equipment (UE) configured with a dual connectivity to a first cell group and a second cell group, the processing apparatus comprising: at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising: determining a first power for a first transmission of transmitting a first uplink channel in a first transmission time toward the first cell group; determining a second power for a second transmission of transmitting a second uplink channel in a second transmission time toward the second cell group; and scaling down the second power for transmitting the second uplink channel based on that a maximum power is exceeded, wherein the first uplink channel includes a first physical random access channel (PRACH), wherein the second uplink channel includes a second PRACH, wherein the scaling down is performed based on that the first transmission time in which the first uplink channel including the first PRACH is transmitted overlaps the second transmission time in which the second uplink channel including the second PRACH is transmitted, and wherein the second transmission is performed based on that the second power is scaled down by a power reduction value which is smaller than a configured value. ### Claim 14 (depends on 13) The processing apparatus of claim 13, wherein the first power for transmitting the first uplink channel including the first PRACH is not scaled down. ### Claim 15 (depends on 13) The processing apparatus of claim 13, wherein the first cell group corresponds to a master cell group (MCG) and the second cell group belongs corresponds to a secondary cell group (SCG). ### Claim 16 (depends on 13) The processing apparatus of claim 13, wherein the operations further comprise: scaling down the first power for transmitting the first uplink channel based on the first power exceeding a threshold value, wherein the first uplink channel includes at least one of a first physical uplink control channel (PUCCH) or a first physical uplink shared channel (PUSCH), and wherein the at least one of the first PUCCH or the first PUSCH includes a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/negative-acknowledgement (NACK) signal. ### Claim 17 (depends on 16) The processing apparatus of claim 16, wherein the at least one of the first PUCCH or the first PUSCH further includes a scheduling request (SR). ### Claim 18 (depends on 13) The processing apparatus of claim 13, wherein the second uplink channel further includes at least one of a second PUCCH or a second PUSCH which include a second HARQ-ACK signal.