# US 12,120,698 B2 · Method and device for detecting downlink control information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,698 B2 - Document ID: US12120698B2 - Status: Granted - Kind: B2 - Application number: 17/528,140 - Filed: 2021-11-16 - Published: 2022-03-10 - Granted: 2024-10-15 - Earliest claimed: 2019-07-05 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Wenhong Chen; Zhihua Shi - Web page: https://patentgrep.com/patent/US12120698B2 ## CPC - H04L 1/0031: {Multiple signaling transmission (H04L1/1664, F15 take precedence)} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/06968: {using quasi-colocation [QCL] between signals} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - 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)} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04L 5/0046: {Determination of the number of bits transmitted on different sub-channels} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - 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) - H04B: TRANSMISSION ## Abstract Provided are a downlink signal transmission method and device, which can improve signal transmission performance. The method includes: a terminal device determines the number of bits of a target information indication field in the DCI and/or the information content indicated by the target information indication field according to the configuration of CORESET group index; the terminal device transmits or receives signals scheduled by the DCI based on the number of bits of the target information indication field and/or the information content indicated by the target information indication field. ## Claims ### Claim 1 A method for downlink signal transmission, comprising: determining, by a terminal device, a number of bits of a target information indication field in downlink control information (DCI) and/or an information content indicated by the target information indication field according to configurations of a Control Resource Set (CORESET) pool index; detecting, by the terminal device, the DCI based on the number of bits of the target information indication field in the DCI and/or the information content indicated by the target information indication field; and sending or receiving, by the terminal device, signals scheduled by the DCI according to the DCI; wherein determining, by the terminal device, the number of bits of the target information indication field in the DCI and/or the information content indicated by the target information indication field according to the configurations of the CORESET pool index comprises: determining, by the terminal device, the number of bits of the target information indication field and/or the information content indicated by the target information indication field according to a quantity of the configured CORESET pool indexes, wherein the quantity is greater than or equal to 0; wherein the number of bits of the target information indication field when the quantity is a first value is different from the number of bits of the target information indication field when the quantity is a second value; and/or the information content indicated by the target information indication field when the quantity is the first value is different from the information content indicated by the target information indication field when the quantity is the second value. ### Claim 2 (depends on 1) The method of claim 1, wherein the target information indication field comprises at least one of: a demodulation reference signal (DMRS) port indication field, a transmission configuration indicator (TCI) indication field, a hybrid automatic repeat reQuest (HARQ) process indication field, a second transport block information indication field, a downlink assignment index (DAI) indication field and a physical uplink control channel (PUCCH) resource indication field. ### Claim 3 (depends on 1) The method of claim 1, wherein when the CORESET pool index is not comprised in parameters of any CORESET configured for the terminal device, the quantity of the CORESET pool index is 0; and/or when all the CORESET pool indexes comprised in the parameters of CORESETs configured for the terminal device are equal to 0 or all the CORESET pool indexes comprised in the parameters of CORESETs configured for the terminal device are equal to 1, the quantity of the CORESET pool indexes is 1; and/or when the CORESET pool indexes comprised in the parameters of a portion of the CORESETs configured for the terminal device are equal to 0, and the CORESET pool indexes comprised in the parameters of another portion of the CORESETs configured for the terminal device are equal to 1, the quantity of the CORESET pool indexes is 2. ### Claim 4 (depends on 1) The method of claim 1, wherein: the target information indication field comprises the DMRS port indication field, and a mapping relationship between values of the DMRS port indication field and DMRS ports when the quantity of the CORESET pool indexes is the first value is different from the mapping relationship when the quantity is the second value; and/or the target information indication field comprises the TCI indication field, and TCI states corresponding to values of the TCI indication field when the quantity is the first value are different from the TCI states corresponding to the values of the TCI indication field when the quantity is the second value; and/or the target information indication field comprises the TCI indication field, and the TCI indication field is only used for indicating one TCI state when the quantity is the first value, and the TCI indication field is capable of being used for indicating one or more TCI states when the quantity is the second value; and/or the target information indication field comprises the HARQ process indication field, and an HARQ process indicated by the HARQ process indication field when the quantity is the first value is different from the HARQ process indicated by the HARQ process indication field when the quantity is the second value; and/or the target information indication field comprises the second transport block information indication field, and the second transport block information indication field is capable of being used for indicating whether the second transport block is enabled or disabled when the quantity is the first value, and the second transport block information indication field only indicates that the second transport block is disabled when the quantity is the second value; and/or the target information indication field comprises the DAI indication field, and an index indicated by the DAI indication field is capable of being used for transmission of PDSCHs scheduled in a plurality of CORESETs when the quantity is the first value, and the index indicated by the DAI indication field is only used for transmission of the PDSCHs scheduled in a CORESET where the DCI is located when the quantity is the second value; and/or the target information indication field comprises the PUCCH resource indication field, and the PUCCH resource indication field is used for indicating PUCCH resources in a first PUCCH resource set when the quantity is the first value, and the PUCCH resource indication field is used for indicating PUCCH resources in a second PUCCH resource set when the quantity is the second value. ### Claim 5 (depends on 1) The method of claim 1, wherein: the first value is 0, and the second value is greater than 0; or the first value is 1, and the second value is 0 or 2; or the first value is any one of 0, 1 and 2, and the second value is other values among 0, 1 and 2 than the first value; or the first value is 2, and the second value is 0 and 1. ### Claim 6 (depends on 1) The method of claim 1, wherein: the DCI is DCI detected in any one of the plurality of CORESETs configured for the terminal device. ### Claim 7 A terminal device, comprising a memory and a processor, wherein the processor is configured to execute instructions stored in the memory to perform following operations: determine a number of bits of a target information indication field in downlink control information (DCI) and/or an information content indicated by the target information indication field according to configurations of Control Resource Set (CORESET) pool index; detect the DCI based on the number of bits of the target information indication field in the DCI and/or the information content indicated by the target information indication field; and send or receive signals scheduled by the DCI according to the DCI; wherein the processor is further configured to execute instructions stored in the memory to perform following operation: determine the number of bits of the target information indication field and/or the information content indicated by the target information indication field according to a quantity of configured CORESET pool indexes, wherein the quantity is greater than or equal to 0; when the CORESET pool index is not comprised in parameters of any CORESET configured for the terminal device, the quantity of the CORESET pool indexes is 0; and/or when all the CORESET pool indexes comprised in the parameters of the CORESETs configured for the terminal device are 0 or when all the CORESET pool indexes comprised in the parameters of the CORESETs configured for the terminal device are 1, the quantity of the CORESET pool indexes is 1; and/or when the CORESET pool indexes comprised in the parameters of a portion of the CORESETs configured for the terminal device are 0, and the CORESET pool indexes comprised in the parameters of another portion of the CORESETs configured for the terminal device are 1, the quantity of CORESET pool indexes is 2; wherein: the number of bits of the target information indication field when the quantity is a first value is different from the number of bits of the target information indication field when the quantity is a second value; and/or the information content indicated by the target information indication field when the quantity is the first value is different from the information content indicated by the target information indication field when the quantity is the second value. ### Claim 8 (depends on 7) The terminal device of claim 7, wherein the target information indication field comprises at least one of: a demodulation reference signal (DMRS) port indication field, a transmission configuration indicator (TCI) indication field, a hybrid automatic repeat reQuest (HARQ) process indication field, a second transport block information indication field, a downlink assignment index (DAI) indication field and a physical uplink control channel (PUCCH) resource indication field. ### Claim 9 (depends on 7) The terminal device according to claim 7, wherein: the target information indication field comprises the DMRS port indication field, and a mapping relationship between values of the DMRS port indication field and DMRS ports when the quantity of the CORESET pool indexes is the first value is different from the mapping relationship when the quantity is the second value; and/or the target information indication field comprises the TCI indication field, and TCI states corresponding to values of the TCI indication field when the quantity is the first value are different from the TCI states corresponding to the values of the TCI indication field when the quantity is the second value; and/or the target information indication field comprises the TCI indication field, and the TCI indication field is only used for indicating one TCI state when the quantity is the first value, and the TCI indication field is capable of being used for indicating one or more TCI states when the quantity is the second value; and/or the target information indication field comprises the HARQ process indication field, and an HARQ process indicated by the HARQ process indication field when the quantity is the first value is different from the HARQ process indicated by the HARQ process indication field when the quantity is the second value; and/or the target information indication field comprises the second transport block information indication field, and the second transport block information indication field is capable of being used for indicating whether the second transport block is enabled or disabled when the quantity is the first value, and the second transport block information indication field only indicates that the second transport block is disabled when the quantity is the second value; and/or the target information indication field comprises the DAI indication field, and an index indicated by the DAI indication field is capable of being used for transmission of PDSCHs scheduled in a plurality of CORESETs when the quantity is the first value, and the index indicated by the DAI indication field is only used for transmission of the PDSCHs scheduled in a CORESET where the DCI is located when the quantity is the second value; and/or the target information indication field comprises the PUCCH resource indication field, and the PUCCH resource indication field is used for indicating PUCCH resources in a first PUCCH resource set when the quantity is the first value, and the PUCCH resource indication field is used for indicating PUCCH resources in a second PUCCH resource set when the quantity is the second value. ### Claim 10 (depends on 7) The terminal device of claim 7, wherein: the first value is 0, and the second value is greater than 0; or the first value is 1, and the second value is 0 or 2; or the first value is any one of 0, 1 and 2, and the second value is another one of 0, 1 and 2 than the first value; or the first value is 2, and the second value is 0 and 1. ### Claim 11 (depends on 7) The terminal device of claim 7, wherein the DCI is DCI detected in any of the plurality of CORESETs configured for the terminal device. ### Claim 12 (depends on 1) A chip, comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to perform the method according to claim 1.