# US 2021/0243700 A1 · Method and apparatus for controlling uplink transmission power by terminal for dual connectivity in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243700 A1 - Document ID: US20210243700A1 - Status: Published application - Kind: A1 - Application number: 17/053,000 - Filed: 2019-05-07 - Published: 2021-08-05 - Earliest claimed: 2018-05-11 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Seunghoon CHOI; Youngbum KIM; Taehyoung KIM; Jinyoung OH - Web page: https://patentgrep.com/patent/US20210243700A1 ## CPC - H04W 52/146: {Uplink power control} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/30: using constraints in the total amount of available transmission power - H04W 52/346: {distributing total power among users or channels} - H04W 52/48: during retransmission after error or non-acknowledgment - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 52/38: TPC being performed in particular situations - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present disclosure relates to a communication technique for convergence of IoT technology and a 5G communication system for supporting a higher data transfer rate beyond a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) on the basis of 5G communication technology and IoT-related technology. Disclosed are a method and an apparatus for controlling uplink-transmitted transmission power in a wireless communication system. ## Claims ### Claim 1 A method by a terminal for performing dual connectivity with a first base station based on a first radio access technology and a second base station based on a second radio access technology in a wireless communication system, the method comprising: receiving, from the first base station, a downlink signal; identifying whether a transmission timing of a first uplink signal corresponding to the downlink signal overlaps a transmission timing of a second uplink signal which is transmitted to the second base station; identifying whether a sum of first transmission power for the transmission of the first uplink signal and second transmission power for the transmission of the second uplink signal exceeds a maximum transmission power of the terminal, in case that the transmission timing of the first uplink signal overlaps the transmission timing of the second uplink signal; and controlling the second transmission power based on a processing time for the transmission of the first uplink signal, in case that the sum exceeds the maximum transmission power of the terminal. ### Claim 2 (depends on 1) The method of claim 1, wherein the processing time includes: a time for receiving a physical downlink shared channel (PDSCH) or a preparation time for a transmission of a physical uplink shared channel (PUSCH), scheduled by a physical downlink control channel (PDCCH), in case that the downlink signal is the PDCCH; and a preparation time for transmission of a hybrid automatic repeat and request (HARQ) acknowledgment/negative ack (ACK/NACK) corresponding to the received PDSCH, in case that the downlink signal is the PDSCH. ### Claim 3 (depends on 1) The method of claim 1, wherein the controlling of the second transmission power comprises lowering the maximum transmission power configured for the second base station to a predetermined transmission power value. ### Claim 4 (depends on 3) The method of claim 3, further comprising: receiving, from the first base station, the predetermined transmission power value, wherein the first radio access technology is a new radio (NR), and wherein the second radio access technology is an evolved-universal mobile communication system (UMTS) terrestrial radio access (E-UTRA). ### Claim 5 A first base station method for supporting dual connectivity for a terminal between the first base station based on a first radio access technology and a second base station based on a second radio access technology in a wireless communication system, the method comprising: transmitting, to the terminal, a downlink signal; and receiving, from the terminal, a first uplink signal corresponding to the downlink signal based on first transmission power, wherein, in case that a transmission timing of the first uplink signal overlaps a transmission timing of a second uplink signal which is transmitted from the terminal to the second base station, and a sum of the first transmission power and second transmission power which is used for the transmission of the second uplink signal exceeds a maximum transmission power of the terminal, second transmission power is controlled based on a processing time of the first uplink signal of the terminal. ### Claim 6 (depends on 5) The method of claim 5, wherein the processing time of the terminal includes: a time for receiving a physical downlink shared channel (PDSCH) or a preparation time for transmission of a physical uplink shared channel (PUSCH), scheduled by a physical downlink control channel (PDCCH), in case that the downlink signal is the PDCCH; and a preparation time for a transmission of a hybrid automatic repeat and request (HARQ) acknowledgment/negative ack (ACK/NACK) corresponding to the received PDSCH, in case that the downlink signal is the PDSCH. ### Claim 7 (depends on 5) The station method of claim 5, wherein the second transmission power is controlled by configuring the maximum transmission power of the second base station, configured for the terminal, to be lowered to a predetermined transmission power value. ### Claim 8 (depends on 7) The base station method of claim 7, further comprising: transmitting, to the terminal, the predetermined transmission power value, wherein the first radio access technology is a new radio (NR), and wherein the second radio access technology is an evolved-universal mobile communication system (UMTS) terrestrial radio access (E-UTRA). ### Claim 9 A terminal for performing dual connectivity with a first base station based on a first radio access technology and a second base station based on a second radio access technology in a wireless communication system, the terminal comprising: a transceiver; and a controller configured to: control the transceiver to receive, from the first base station, a downlink signal; identify whether a first time resource for a transmission of a first uplink signal corresponding to the downlink signal overlaps a second time resource for a transmission of a second uplink signal which is transmitted to the second base station; identify whether a sum of first transmission power for the transmission of the first uplink signal and second transmission power for the transmission of the second uplink signal exceeds a maximum transmission power of the terminal, in case that the transmission timing of the first uplink signal overlaps the transmission timing of the second uplink signal; and control the second transmission power based on a processing time for the transmission of the first uplink signal, in case that the sum exceeds the maximum transmission power of the terminal. ### Claim 10 (depends on 9) The terminal of claim 9, wherein the processing time includes: a time for receiving a physical downlink shared channel (PDSCH) or a preparation time for a transmission of a physical uplink shared channel (PUSCH), scheduled by a physical downlink control channel (PDCCH), in case that the downlink signal is the PDCCH; and a preparation time for transmission of a hybrid automatic repeat and request (HARQ) acknowledgment/negative ack (ACK/NACK) corresponding to the received PDSCH, in case that the downlink signal is the PDSCH. ### Claim 11 (depends on 9) The terminal of claim 9, wherein the controller is configured to: lower the maximum transmission power configured for the second base station to a predetermined transmission power value; and control the second transmission power based on the predetermined transmission power value. ### Claim 12 (depends on 11) The terminal of claim 11, wherein the controller is configured to control the transceiver to receive, from the first base station, the predetermined transmission power value, wherein the first radio access technology is a new radio (NR), and wherein the second radio access technology is an evolved-universal mobile communication system (UMTS) terrestrial radio access (E-UTRA). ### Claim 13 A first base station for supporting dual connectivity for a terminal between the first base station based on a first radio access technology and a second base station based on a second radio access technology in a wireless communication system, the first base station comprising: a transceiver; and a controller configured to: control the transceiver to transmit, to the terminal, a downlink signal, and control the transceiver to receive, from the terminal, a first uplink signal corresponding to the downlink signal based on first transmission power, wherein, in case that a transmission timing of the first uplink signal overlaps a transmission timing of a second uplink signal which is transmitted from the terminal to the second base station, and a sum of the first transmission power and second transmission power which is used for the transmission of the second uplink signal exceeds a maximum transmission power of the terminal, second transmission power is controlled based on a processing time of the first uplink signal of the terminal. ### Claim 14 (depends on 13) The first base station of claim 13, wherein the processing time of the terminal includes: a time for receiving a physical downlink shared channel (PDSCH) or a preparation time for transmission of a physical uplink shared channel (PUSCH), scheduled by a physical downlink control channel (PDCCH), in case that the downlink signal is the PDCCH; and a preparation time for a transmission of a hybrid automatic repeat and request (HARQ) acknowledgment/negative ack (ACK/NACK) corresponding to the received PDSCH, in case that the downlink signal is the PDSCH. ### Claim 15 (depends on 13) The first base station of claim 13, wherein the controller is configured to control the transceiver to transmit, to the terminal, the predetermined transmission power value, wherein the second transmission power is controlled by configuring the maximum transmission power of the second base station, configured for the terminal, to be lowered to a predetermined transmission power value, wherein the first radio access technology is a new radio (NR), and wherein the second radio access technology is an evolved-universal mobile communication system (UMTS) terrestrial radio access (E-UTRA).