# US 10,375,649 B2 · Method and apparatus for controlling transmission power of uplink control channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,649 B2 - Document ID: US10375649B2 - Status: Granted - Kind: B2 - Application number: 14/241,760 - Filed: 2013-09-26 - Published: 2015-02-19 - Granted: 2019-08-06 - Earliest claimed: 2012-09-26 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Dong Youn Seo; Joon Kui Ahn - Web page: https://patentgrep.com/patent/US10375649B2 ## CPC - H04W 52/146: {Uplink power control} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W 52/42: in systems with time, space, frequency or polarisation diversity - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention provides a method for controlling transmission power of an uplink control channel carried out by an user equipment in a wireless communication system and an user equipment using the method. The method comprises: receiving uplink power control information; and determining transmission power of an uplink control channel based on the uplink power control information, wherein the uplink power control information includes a power offset value determined according to whether transmit diversity is applied when the uplink control channel is transmitted through a channel selection scheme. ## Claims ### Claim 1 A method for controlling transmission power of a physical uplink control channel (PUCCH), performed by a user equipment (UE), in a wireless communication system, the method comprising: receiving uplink power control information; receiving physical downlink control channels (PDCCHs); receiving physical downlink shared channels (PDSCHs) scheduled by the PDCCHs through at least one serving cell; determining transmission power for the PUCCH based on the uplink power control information; and transmitting ACK/NACK (acknowledgement/negative-acknowledgement) information for the PDSCHs through the PUCCH at the determined transmission power using two resources, wherein the uplink power control information includes a transmit diversity power offset value determined according to whether the PUCCH is transmitted using transmit diversity and whether the PUCCH is transmitted using a channel selection scheme, wherein a set of candidate values for the transmit diversity offset corresponding to each of a plurality PUCCH formats, none of which use a channel selection scheme, are the same, wherein only a set of candidate values for the transmit diversity power offset corresponding to one of the plurality of PUCCH formats, which uses a channel election scheme, is different from the set of candidate values for the transmit diversity power offset corresponding to each of the remaining PUCCH formats, none of which use a channel selection scheme, wherein a first resource among the two resources is determined based on a lowest control channel element (CCE) index of the PDCCH and a second resource among the two resources is determined based on a ‘lowest CCE index of the PDCCH+1’, wherein when the UE supports aggregating up to two serving cells and when two serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme, and wherein when the UE supports aggregating three or more serving cells and when two or more serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme or PUCCH format 3 based on a higher layer signal. ### Claim 2 (depends on 1) The method of claim 1, wherein the channel selection scheme indicates one of a plurality of ACK (acknowledgement)/NACK (negative acknowledgement) combinations using two bits transmitted through a single PUCCH (Physical Uplink Control Channel) resource selected from a plurality of PUCCH resources. ### Claim 3 (depends on 2) The method of claim 2, wherein the UE supports aggregation of two or more cells. ### Claim 4 (depends on 1) The method of claim 1 further comprising: transmitting the PUCCH through two antenna ports when transmit diversity is applied. ### Claim 5 (depends on 4) The method of claim 4, wherein the PUCCH is transmitted through each of the two antenna ports using each of two PUCCH resources orthogonal to each other, respectively. ### Claim 6 (depends on 1) The method of claim 1, wherein the uplink power control information is received through an RRC (Radio Resource Control) message. ### Claim 7 (depends on 1) The method of claim 1, further comprising: transmitting the PUCCH using the determined transmission power. ### Claim 8 A user equipment (UE) comprising: a transceiver that transmits and receives radio signals; and a processor operationally connected to the transceiver, wherein the processor is configured to: receive uplink power control information; receive physical downlink control channels (PDCCHs); receive physical downlink shared channels (PDSCHs) scheduled by the PDCCHs through at least one serving cell; determine transmission power for a physical uplink control channel (PUCCH) based on the uplink power control information; and transmit ACK/NACK (acknowledgement/negative-acknowledgement) information for the PDSCHs through the PUCCH at the determined transmission power using two resources, wherein the uplink power control information includes a transmit diversity power offset value determined according to whether the PUCCH is transmitted using transmit diversity and whether the PUCCH is transmitted using a channel selection scheme, wherein a set of candidate values for the transmit diversity offset corresponding to each of a plurality PUCCH formats, none of which use a channel selection scheme, are the same, wherein only a set of candidate values for the transmit diversity power offset corresponding to one of the plurality of PUCCH formats, which uses a channel election scheme, is different from the set of candidate values for the transmit diversity power offset corresponding to each of the remaining PUCCH formats, none of which use a channel selection scheme, wherein a first resource among the two resources is determined based on a lowest control channel element (CCE) index of the PDCCH and a second resource among the two resources is determined based on a ‘lowest CCE index of the PDCCH+1’, wherein when the UE supports aggregating up to two serving cells and when two serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme, and wherein when the UE supports aggregating three or more serving cells and when two or more serving cells are allocated to the UE, the UE transmits the ACK/NACK information using the channel selection scheme or PUCCH format 3 based on a higher layer signal. ### Claim 9 (depends on 8) The UE of claim 8, wherein the channel selection scheme indicates one of a plurality of ACK (acknowledgement)/NACK (negative acknowledgement) combinations using two bits transmitted through a single PUCCH resource selected from a plurality of PUCCH resources. ### Claim 10 (depends on 9) The UE of claim 9, wherein the UE supports aggregation of two or more cells. ### Claim 11 (depends on 8) The UE of claim 8, wherein the processor transmits the PUCCH through two antenna ports when transmit diversity is applied. ### Claim 12 (depends on 11) The UE of claim 11, wherein the PUCCH is transmitted through each of the two antenna ports using each of two PUCCH resources orthogonal to each other, respectively. ### Claim 13 (depends on 8) The UE of claim 8, wherein the uplink power control information is received through an RRC (Radio Resource Control) message. ### Claim 14 (depends on 8) The UE of claim 8, wherein the processor transmits the PUCCH using the determined transmission power.