# US 10,455,514 B2 · Method and device for transmitting signal 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 10,455,514 B2 - Document ID: US10455514B2 - Status: Granted - Kind: B2 - Application number: 15/745,512 - Filed: 2016-07-15 - Published: 2018-07-26 - Granted: 2019-10-22 - Earliest claimed: 2015-07-17 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jin-Young Oh; Seung-Hoon Choi; Young-Woo Kwak; Hoon-Dong Noh; Dong-Han Kim; Cheol-Kyu Shin; Youn-Sun Kim; Sang-Min Ro - Web page: https://patentgrep.com/patent/US10455514B2 ## CPC - H04W 52/146: {Uplink power control} - H04W 52/38: TPC being performed in particular situations - H04W 52/42: in systems with time, space, frequency or polarisation diversity - H04W 72/044: based on the type of the allocated resource - H04W 52/242: {taking into account path loss} - H04W 52/36: with a discrete range or set of values, e.g. step size, ramping or offsets - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The disclosed technique and system can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retailing, security and safety related services, and the like) on the basis of 5G communication technology and IoT related technology. A method for controlling uplink transmission power of a terminal in a wireless communication system comprises the steps of: initializing a power control adjustment value when a repetition level for a coverage enhancement mode is changed; updating the power control adjustment value according to a transmission power control (TPC) command received from a base station; calculating uplink transmission power on the basis of the updated power control adjustment value and the repetition level; and transmitting uplink data or control information by the calculated uplink transmission power. ## Claims ### Claim 1 A method for controlling an uplink transmission power of a terminal in a wireless communication system, the method comprising: identifying whether a coverage enhancement mode of the terminal is a coverage enhancement mode A (CE mode A) or a coverage enhancement mode B (CE mode B); identifying an uplink transmission power corresponding to a first subframe of a plurality of subframes using a maximum uplink transmission power of the terminal corresponding to the first subframe, a path-loss between the terminal and a base station, and a power control adjustment value corresponding to the first subframe, in response to identifying that the coverage enhancement mode of the terminal is the CE mode A; identifying the maximum uplink transmission power of the terminal corresponding to the first subframe as the uplink transmission power corresponding to the first subframe, in response to identifying that the coverage enhancement mode of the terminal is the CE mode B; and transmitting data or control information through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) on the plurality of subframes with the identified uplink transmission power, wherein the identified uplink transmission power is maintained in the plurality of subframes. ### Claim 2 (depends on 1) The method as claimed in claim 1, wherein the uplink transmission power for transmitting the PUSCH or the PUCCH on the plurality of subframes is limited by the maximum uplink transmission power. ### Claim 3 (depends on 1) The method as claimed in claim 1, wherein the plurality of subframes for an uplink repetition transmission are determined based on a repetition level for the identified coverage enhancement mode and the repetition level is configured through an upper layer signaling message or downlink control information. ### Claim 4 (depends on 1) The method as claimed in claim 1, wherein the plurality of subframes for an uplink repetition transmission are determined based on a repetition level for the identified coverage enhancement mode, and wherein the repetition level is determined in consideration of at least one of the path-loss, a number of antennas of the terminal, or a size of a reception buffer of the terminal. ### Claim 5 (depends on 1) The method as claimed in claim 1, further comprising: receiving, from the base station, a transmission power control (TPC); and updating the power control adjustment value according to the TPC, wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured by an upper layer, whether a random access response is received, or whether a repetition level of the uplink transmission power is changed. ### Claim 6 A method by a base station for controlling an uplink transmission power of a terminal in a wireless communication system, the method comprising: transmitting, to the terminal, information on a repetition level for a coverage enhancement mode, the coverage enhancement mode including a coverage enhancement mode A (CE mode A) or a coverage enhancement mode B (CE mode B); and receiving, from the terminal, data or control information through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) on a plurality of subframes with the uplink transmission power, wherein the uplink transmission power corresponds to a first subframe of the plurality of subframes, wherein the uplink transmission power is set using a maximum uplink transmission power of the terminal corresponding to the first subframe, a path-loss between the base station and the terminal, and a power control adjustment value corresponding to the first subframe, in response to the information on the repetition level indicating the CE mode A, wherein the uplink transmission power is set as the maximum uplink transmission power of the terminal corresponding to the first subframe, in response to the information on the repetition level indicating the CE mode B, and wherein the uplink transmission power of the terminal is maintained in the plurality of subframes. ### Claim 7 (depends on 6) The method as claimed in claim 6, wherein the uplink transmission power for transmitting the PUSCH or the PUCCH on the plurality of subframes is limited by the maximum uplink transmission power. ### Claim 8 (depends on 6) The method as claimed in claim 6, wherein the plurality of subframes for an uplink repetition transmission are determined based on the repetition level and information on the repetition level is transmitted through an upper layer signaling message or downlink control information. ### Claim 9 (depends on 8) The method as claimed in claim 8, wherein the plurality of subframes for the uplink repetition transmission are determined based on the repetition level and the repetition level is determined in consideration of at least one of the path-loss, a number of antennas of the terminal, or a size of a reception buffer of the terminal. ### Claim 10 (depends on 6) The method as claimed in claim 6, further comprising: transmitting, to the terminal, a transmission power control (TPC) for updating the power control adjustment value; wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured by an upper layer, whether a random access response is received, or whether the repetition level of the uplink transmission power is changed. ### Claim 11 A terminal for controlling an uplink transmission power of a terminal in a wireless communication system, the terminal comprising: a controller configured to: identify whether a coverage enhancement mode of the terminal is a coverage enhancement mode A (CE mode A) or a coverage enhancement mode B (CE mode B), identify an uplink transmission power corresponding to a first subframe of a plurality of subframes using a maximum uplink transmission power of the terminal corresponding to the first subframe, a path-loss between the terminal and a base station, and a power control adjustment value corresponding to the first subframe if the coverage enhancement mode of the terminal is the CE mode A, identify the maximum uplink transmission power of the terminal corresponding to the first subframe as the uplink transmission power corresponding to the first subframe if the coverage enhancement mode of the terminal is the CE mode B, and transmit data or control information through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) on the plurality of subframes with the identified uplink transmission power, wherein the identified uplink transmission power is maintained in the plurality of subframes. ### Claim 12 (depends on 11) The terminal as claimed in claim 11, wherein if the uplink transmission power for transmitting the PUSCH or the PUCCH on the plurality of subframes is limited by the maximum uplink transmission power. ### Claim 13 (depends on 11) The terminal as claimed in claim 11, wherein the plurality of subframes for an uplink repetition transmission are determined based on a repetition level for the identified coverage enhancement mode and the repetition level is configured through an upper layer signaling message or downlink control information. ### Claim 14 (depends on 11) The terminal as claimed in claim 11, wherein the plurality of subframes for an uplink repetition transmission are determined based on a repetition level for the identified coverage enhancement mode, and wherein the repetition level is determined in consideration of at least one of the path-loss, a number of antennas of the terminal, or a size of a reception buffer of the terminal. ### Claim 15 (depends on 11) The terminal as claimed in claim 11, wherein the controller is further configured to: receive, from the base station, a transmission power control (TPC), and update the power control adjustment value according to the TPC, and wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured by an upper layer, whether a random access response is received, or whether a repetition level of the uplink transmission power is changed. ### Claim 16 A base station for controlling an uplink transmission power of a terminal in a wireless communication system, the base station comprising: a transceiver; and a controller configured to: transmit, to the terminal, information on a repetition level for a coverage enhancement mode, the coverage enhancement mode including a coverage enhancement mode A (CE mode A) or a coverage enhancement mode B (CE mode B), receive, from the terminal, data or control information through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) on a plurality of subframes with the uplink transmission power, wherein the uplink transmission power corresponds to a first subframe of the plurality of subframes, wherein the uplink transmission power is set using a maximum uplink transmission power of the terminal corresponding to the first subframe, a path-loss between a serving cell and the terminal, and a power control adjustment value corresponding to the first subframe if the coverage enhancement mode is the CE mode A, wherein the uplink transmission power is set as the maximum uplink transmission power of the terminal corresponding to the first subframe if the coverage enhancement mode is the CE mode B, and wherein the uplink transmission power of the terminal is maintained on the plurality of subframes. ### Claim 17 (depends on 16) The base station as claimed in claim 16, wherein if the uplink transmission power for transmitting the PUSCH or the PUCCH on the plurality of subframes is limited by the maximum uplink transmission power. ### Claim 18 (depends on 16) The base station as claimed in claim 16, wherein the plurality of subframes for an uplink repetition transmission are determined based on the repetition level and the information on the repetition level is transmitted through an upper layer signaling message or downlink control information. ### Claim 19 (depends on 18) The base station as claimed in claim 18, wherein the plurality of subframes for the uplink repetition transmission are determined based on the repetition level, and wherein the repetition level is determined in consideration of at least one of the path-loss, a number of antennas of the terminal, or a size of a reception buffer of the terminal. ### Claim 20 (depends on 16) The base station as claimed in claim 16, wherein the controller is further configured to transmit, to the terminal, a transmission power control (TPC) for updating the power control adjustment value, and wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured by an upper layer, whether a random access response is received, or whether the repetition level of the uplink transmission power is changed.