# US 9,521,674 B2 · Method and apparatus for transmitting and receiving uplink data in mobile communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,521,674 B2 - Document ID: US9521674B2 - Status: Granted - Kind: B2 - Application number: 14/707,756 - Filed: 2015-05-08 - Published: 2015-08-27 - Granted: 2016-12-13 - Earliest claimed: 2010-06-22 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Soeng-Hun Kim; Joon-Young Cho; Gert-Jan Van Lieshout - Web page: https://patentgrep.com/patent/US9521674B2 ## CPC - H04W 72/0473: {the resource being transmission power} - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0046: {Determination of the number of bits transmitted on different sub-channels} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/146: {Uplink power control} - H04W 52/346: {distributing total power among users or channels} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A method for transmitting uplink data using a plurality of cells by a user equipment (UE) in a mobile communication system supporting carrier aggregation (CA) is provided. The method includes determining first maximum transmission powers for the plurality of cells, each first maximum transmission power indicating a maximum transmission power for a cell of the plurality of cells, and a second maximum transmission power indicating a maximum total transmission power for all of the plurality of cells, determining an uplink transmission power for each cell of the plurality of cells by selecting a minimum value for the each cell, the minimum value being selected from among a required transmission power for the each cell and the first maximum transmission power for the each cell, scaling the determined uplink transmission powers for the plurality of cells so that a sum of the scaled uplink transmission powers is less than or equal to the second maximum transmission power, and transmitting the uplink data using the plurality of cells based on the scaled uplink transmission powers for the plurality of cells. ## Claims ### Claim 1 A method for transmitting uplink data using a plurality of cells by a user equipment (UE) in a mobile communication system supporting carrier aggregation (CA), the method comprising: receiving information for setting transmission power from an evolved Node B (eNB); determining first maximum transmission powers for the plurality of cells, each first maximum transmission power indicating a maximum transmission power for a cell of the plurality of cells, and a second maximum transmission power indicating a maximum total transmission power for all of the plurality of cells; determining an uplink transmission power for each cell of the plurality of cells by selecting a minimum value for the each cell, the minimum value being selected from among a required transmission power for the each cell and the first maximum transmission power for the each cell; if a sum of the determined uplink transmission powers for the plurality of cells is greater than the second maximum transmission power, scaling the determined uplink transmission powers for the plurality of cells so that the sum of the scaled uplink transmission powers is less than or equal to the second maximum transmission power; and transmitting the uplink data using the plurality of cells based on the scaled uplink transmission powers for the plurality of cells, wherein determining the first maximum transmission powers for the plurality of cells comprises: determining a maximum value of the each first maximum transmission power for the each cell and a minimum value of the each first maximum transmission power for the each cell based on the information for setting transmission power; and determining the each first maximum transmission power for the each cell such that the value of the each first maximum transmission power for the each cell is less than or equal to the maximum value of the each first maximum transmission power for the each cell and greater than or equal to the minimum value of the each first maximum transmission power for the each cell. ### Claim 2 (depends on 1) The method of claim 1, wherein the maximum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a maximum transmission power allowed in the each cell and a maximum transmission power available in the each cell by the UE. ### Claim 3 (depends on 1) The method of claim 1, wherein the minimum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a difference between a maximum transmission power allowed in the each cell and an allowed power reduction value, and a difference between a maximum transmission power available in the each cell by the UE and the allowed power reduction value. ### Claim 4 (depends on 1) The method of claim 1, wherein determining the second maximum transmission power comprises: determining a maximum value of the second maximum transmission power based on a capability of the UE; determining a minimum value of the second maximum transmission power based on an allowed power reduction value; and determining the second maximum transmission power based on the maximum value of the second maximum transmission power and the minimum value of the second maximum transmission power. ### Claim 5 (depends on 4) The method of claim 4, wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE. ### Claim 6 An apparatus for transmitting uplink data using a plurality of cells by a user equipment (UE) in a mobile communication system supporting carrier aggregation (CA), the apparatus comprising: a receiver configured to receive information for setting transmission power from an evolved Node B (eNB); a controller configured to determine first maximum transmission powers for the plurality of cells, each first maximum transmission power indicating a maximum transmission power for a cell of the plurality of cells, and a second maximum transmission power indicating a maximum total transmission power for all of the plurality of cells, determine an uplink transmission power for each cell of the plurality of cells by selecting a minimum value for the each cell, the minimum value being selected from among a required transmission power for the each cell and the first maximum transmission power for the each cell, and if a sum of the determined uplink transmission powers for the plurality of cells is greater than the second maximum transmission power, scale the determined uplink transmission powers for the plurality of cells so that the sum of the scaled uplink transmission powers is less than or equal to the second maximum transmission power; and a transmitter configured to transmit the uplink data using the plurality of cells based on the scaled uplink transmission powers for the plurality of cells, wherein, for the each cell, the controller is configured to: determine a maximum value of the each first maximum transmission power for the each cell and a minimum value of the each first maximum transmission power for the each cell based on the information for setting transmission power; and determine the each first maximum transmission power for the each cell whose value is less than or equal to the maximum value of the each first maximum transmission power for the each cell and greater than or equal to the minimum value of the each first maximum transmission power for the each cell. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the maximum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a maximum transmission power allowed in the each cell and a maximum transmission power available in the each cell by the UE. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein the minimum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a difference between a maximum transmission power allowed in the each cell and an allowed power reduction value, and a difference between a maximum transmission power available in the each cell by the UE and the allowed power reduction value. ### Claim 9 (depends on 6) The apparatus of claim 6, wherein the controller is configured to: determine a maximum value of the second maximum transmission power based on a capability of the UE; determine a minimum value of the second maximum transmission power based on an allowed power reduction value; and determine the second maximum transmission power based on the maximum value of the second maximum transmission power and the minimum value of the second maximum transmission power. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE. ### Claim 11 A method for receiving uplink data transmitted using a plurality of cells from a user equipment (UE) by an evolved Node B (eNB) in a mobile communication system supporting carrier aggregation (CA), the method comprising: transmitting information, for setting transmission power for the uplink data, to the UE; and receiving, from the UE, the uplink data that is transmitted using the plurality of cells with scaled uplink transmission powers, wherein for the scaled uplink transmission powers, first maximum transmission powers are determined for the multiple carriers, each first maximum transmission power indicating a maximum transmission power for a cell of the plurality of cells, a second maximum transmission power indicating a maximum total transmission power for all of the plurality of cells is determined, an uplink transmission power is determined for each cell of the plurality of cells by selecting a minimum value for the each cell, the minimum value being selected from among a required transmission power for the each cell and the first maximum transmission power for the each cell, and if a sum of the determined uplink transmission powers for the plurality of cells is greater than the second maximum transmission power, the determined uplink transmission powers for the plurality of cells are scaled so that the sum of the scaled uplink transmission powers is less than or equal to the second maximum transmission power, and wherein for the each first maximum transmission power for each cell, a maximum value of the each first maximum transmission power for the each cell and a minimum value of the each first maximum transmission power for the each cell are determined by the UE based on the information, and wherein the each first maximum transmission power for the each cell is determined to have a value which is less than or equal to the maximum value of the each first maximum transmission power for the each cell and greater than or equal to the minimum value of the each first maximum transmission power for the each cell. ### Claim 12 (depends on 11) The method of claim 11, wherein the maximum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a maximum transmission power allowed in the each cell and a maximum transmission power available in the each cell by the UE. ### Claim 13 (depends on 11) The method of claim 11, wherein the minimum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a difference between a maximum transmission power allowed in the each cell and an allowed power reduction value, and a difference between a maximum transmission power available in the each cell by the UE and the allowed power reduction value. ### Claim 14 (depends on 11) The method of claim 11, wherein for the second maximum transmission power, a maximum value of the second maximum transmission power is determined by the UE based on a capability of the UE, a minimum value of the second maximum transmission power is determined based on an allowed power reduction value, and the second maximum transmission power is determined based on the maximum value of the second maximum transmission power and the minimum value of the second maximum transmission power. ### Claim 15 (depends on 14) The method of claim 14, wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE. ### Claim 16 An apparatus for receiving uplink data transmitted using a plurality of cells from a user equipment (UE) by an evolved Node B (eNB) in a mobile communication system supporting carrier aggregation (CA), the apparatus comprising: a transmitter configured to transmit information, for setting transmission power for the uplink data, to the UE; and a receiver for receiving, from the UE, the uplink data that is transmitted using the plurality of cells with scaled uplink transmission powers, wherein for the scaled uplink transmission powers, first maximum transmission powers are determined for the plurality of cells, each first maximum transmission power indicating a maximum transmission power for a cell of the plurality of cells, a second maximum transmission power indicating a maximum total transmission power for all of the plurality of cells is determined, an uplink transmission power is determined for each cell of the plurality of cells by selecting a minimum value for the each cell, the minimum value being selected from among a required transmission power for the each cell and the first maximum transmission power for the each cell, and if a sum of the determined uplink transmission powers for the plurality of cells is greater than the second maximum transmission power, the determined uplink transmission powers for the plurality of cells are scaled so that the sum of the scaled uplink transmission powers is less than or equal to the second maximum transmission power, and wherein for the each first maximum transmission power for each cell, a maximum value of the each first maximum transmission power for the each cell and a minimum value of the each first maximum transmission power for the each cell are determined by the UE based on the information, and wherein the each first maximum transmission power for the each cell is determined to have a value which is less than or equal to the maximum value of the each first maximum transmission power for the each cell and greater than or equal to the minimum value of the each first maximum transmission power for the each cell. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the maximum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a maximum transmission power allowed in the each cell and a maximum transmission power available in the each cell by the UE. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the minimum value of the each first maximum transmission power for the each cell is determined as a minimum value from among a difference between a maximum transmission power allowed in the each cell and an allowed power reduction value, and a difference between a maximum transmission power available in the each cell by the UE and the allowed power reduction value. ### Claim 19 (depends on 16) The apparatus of claim 16, wherein for the second maximum transmission power, a maximum value of the second maximum transmission power is determined by the UE based on a capability of the UE, a minimum value of the second maximum transmission power is determined based on an allowed power reduction value, and the second maximum transmission power is determined based on the maximum value of the second maximum transmission power and the minimum value of the second maximum transmission power. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE.