# US 2018/0026771 A1 · Technique to provide channel format and signal processing for efficiently transmitting control information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0026771 A1 - Document ID: US20180026771A1 - Status: Published application - Kind: A1 - Application number: 15/722,832 - Filed: 2017-10-02 - Published: 2018-01-25 - Earliest claimed: 2010-11-02 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Hyunwoo LEE; Jaehoon CHUNG; Seunghee HAN - Web page: https://patentgrep.com/patent/US20180026771A1 ## CPC - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 1/0041: {Arrangements at the transmitter end} - H04L 1/1607: Details of the supervisory signal - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 36/0072: {of resource information of target access point} - H04W 52/04: Transmission power control [TPC] - H04W 72/04: Wireless resource allocation - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 27/2636: {with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 is provided for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information at a User Equipment (UE) in a wireless communication system. The UE is configured to use a Physical Uplink Control Channel (PUCCH) format 3 for the transmission of the ACK/NACK information. A PUCCH format between a PUCCH format 1a/1b and the PUCCH format 3 is determined for transmission of the ACK/NACK information for downlink transmission in a downlink frame set including M downlink subframes is to be transmitted, where M≧1, in one uplink subframe, according to whether at least one of specific conditions is met. The ACK/NACK information is transmitted using the determined PUCCH format in the one uplink subframe. The ACK/NACK information is transmitted by using the PUCCH format 1a/1b, when at least one of the specific conditions is met. One serving cell is configured for the UE. ## Claims ### Claim 1 A method for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information at a User Equipment (UE) in a wireless communication system, the method comprising: configuring the UE to use a Physical Uplink Control Channel (PUCCH) format 3 for the transmission of the ACK/NACK information; determining a PUCCH format between a PUCCH format 1a/1b and the PUCCH format 3 for transmission of the ACK/NACK information for downlink transmission in a downlink frame set including M downlink subframes is to be transmitted, wherein M≧1, in one uplink subframe, according to whether at least one of specific conditions is met; and transmitting the ACK/NACK information using the determined PUCCH format in the one uplink subframe, wherein the ACK/NACK information is transmitted by using the PUCCH format 1a/1b, when at least one of the specific conditions is met, wherein one serving cell is configured for the UE, and wherein the specific conditions comprise: a first condition where one Physical Downlink Shared Channel (PDSCH) indicated by detection of a corresponding Physical Downlink Control Channel (PDCCH) with a Downlink Assignment Index (DAI) value of 1 is present in the downlink subframe set, and a second condition where one Semi-Persistent Scheduling (SPS) release PDCCH with the DAI value of 1 is present in the downlink subframe set. ### Claim 2 (depends on 1) The method according to claim 1, wherein a resource index of the PUCCH format 1a/1b is derived from a Control Channel Element (CCE) index of the PDCCH. ### Claim 3 (depends on 1) The method according to claim 1, wherein the specific conditions further comprise a third condition where a Semi-Persistent Scheduling (SPS) release PDCCH is not present in the downlink subframe set, and one PDSCH for which the corresponding PDCCH is not detected is present in the downlink subframe set. ### Claim 4 (depends on 3) The method according to claim 3, wherein a resource index of the PUCCH format 1a/1b is determined by a value of a Transmit Power Control (TPC) field of a PDCCH indicating SPS activation for the one PDSCH for which the corresponding PDCCH is not detected. ### Claim 5 (depends on 1) The method according to claim 1, wherein the ACK/NACK information is transmitted using the PUCCH format 3, when one or more PDSCHs indicated by detection of a PDCCH with a DAI value being greater than 1 are present in the downlink subframe set or an SPS release PDCCH with a DAI value being greater than 1 is present in the downlink subframe set. ### Claim 6 (depends on 5) The method according to claim 5, wherein a resource index of the PUCCH format 3 is determined by a value of a Transmit Power Control (TPC) field of a PDCCH with the DAI value being greater than 1, and the PDCCH with the DAI value being greater than 1 is one or both of a PDCCH indicating PDSCH transmission and a PDCCH indicating SPS release. ### Claim 7 (depends on 6) The method according to claim 6, wherein the UE assumes the same PUCCH resource index value is transmitted in a PDCCH indicating the resource index of the PUCCH format 3 in the downlink subframe set and the PDCCH indicating the resource index of the PUCCH format 3 is one or both of the PDCCH indicating PDSCH transmission and the PDCCH indicating SPS release. ### Claim 8 (depends on 1) The method according to claim 1, wherein a Transmit Power Control (TPC) field of a PDCCH with the DAI value being 1 indicates uplink TPC information and the PDCCH with the DAI value being 1 is one or both of a PDCCH indicating PDSCH transmission and a PDCCH indicating SPS release. ### Claim 9 (depends on 1) The method according to claim 1, wherein the wireless communication system is a Time Division Duplex (TDD) wireless communication system. ### Claim 10 A User Equipment (UE) for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a wireless communication system, the UE comprising: a receiver configured to receive a downlink signal from a Base Station (BS); a transmitter configured to transmit an uplink signal to the BS; and a processor configured to control the UE including the receiver and the transmitter, wherein the processor is further configured to: configure the UE to use a Physical Uplink Control Channel (PUCCH) format 3 for the transmission of the ACK/NACK information; determine a PUCCH format between a PUCCH format 1a/1b and the PUCCH format 3 for transmission of the ACK/NACK information for downlink transmission in a downlink frame set including M downlink subframes is to be transmitted, wherein M≧1, in one uplink subframe, according to whether at least one of specific conditions is met; and transmit the ACK/NACK information using the determined PUCCH format in the one uplink subframe, wherein the ACK/NACK information is transmitted by using a PUCCH format 1a/1b, when at least one of the specific conditions is met, wherein one serving cell is configured for the UE, and wherein the specific conditions comprise: a first condition where one Physical Downlink Shared Channel (PDSCH) indicated by detection of a corresponding Physical Downlink Control Channel (PDCCH) with a Downlink Assignment Index (DAI) value of 1 is present in the downlink subframe set, and a second condition where one Semi-Persistent Scheduling (SPS) release PDCCH with the DAI value of 1 is present in the downlink subframe set. ### Claim 11 (depends on 10) The UE according to claim 10, wherein a resource index of the PUCCH format 1a/1b is derived from a Control Channel Element (CCE) index of the PDCCH. ### Claim 12 (depends on 10) The UE according to claim 10, wherein the specific conditions further comprise a third condition where a Semi-Persistent Scheduling (SPS) release PDCCH is not present in the downlink subframe set, and one PDSCH for which the corresponding PDCCH is not detected is present in the downlink subframe set. ### Claim 13 (depends on 12) The UE according to claim 12, wherein a resource index of the PUCCH format 1a/1b is determined by a value of a Transmit Power Control (TPC) field of a PDCCH indicating SPS activation for the one PDSCH for which the corresponding PDCCH is not detected. ### Claim 14 (depends on 10) The UE according to claim 10, wherein the ACK/NACK information is transmitted using the PUCCH format 3, when one or more PDSCHs indicated by detection of a PDCCH with a DAI value being greater than 1 are present in the downlink subframe set or an SPS release PDCCH with a DAI value being greater than 1 is present in the downlink subframe set. ### Claim 15 (depends on 14) The UE according to claim 14, wherein a resource index of the PUCCH format 3 is determined by a value of a Transmit Power Control (TPC) field of a PDCCH with the DAI value being greater than 1, and the PDCCH with the DAI value being greater than 1 is one or both of a PDCCH indicating PDSCH transmission and a PDCCH indicating SPS release. ### Claim 16 (depends on 15) The UE according to claim 15, wherein the UE assumes the same PUCCH resource index value is transmitted in a PDCCH indicating the resource index of the PUCCH format 3 in the downlink subframe set and the PDCCH indicating the resource index of the PUCCH format 3 is one or both of the PDCCH indicating PDSCH transmission and the PDCCH indicating SPS release. ### Claim 17 (depends on 10) The UE according to claim 10, wherein a Transmit Power Control (TPC) field of a PDCCH with the DAI value being 1 indicates uplink TPC information and the PDCCH with the DAI value being 1 is one or both of a PDCCH indicating PDSCH transmission and a PDCCH indicating SPS release. ### Claim 18 (depends on 10) The UE according to claim 10, wherein the wireless communication system is a Time Division Duplex (TDD) wireless communication system.