# US 11,115,243 B2 · Downlink control channel detection method, terminal and base station > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,115,243 B2 - Document ID: US11115243B2 - Status: Granted - Kind: B2 - Application number: 16/500,695 - Filed: 2018-04-04 - Published: 2020-01-30 - Granted: 2021-09-07 - Earliest claimed: 2017-04-06 - Assignees: Vivo Mobile Communication Co., Ltd. - Applicants: Vivo Mobile Communication Co., Ltd. - Inventors: Xiaodong Shen; Zichao Ji; Yu Ding - Web page: https://patentgrep.com/patent/US11115243B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 25/0238: {using blind estimation} - H04L 1/0038: {Blind format detection (for detection of modulation format H04L27/0012)} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 25/02: Details {; arrangements for supplying electrical power along data transmission lines (systems for transmitting signals via power distribution lines H04B3/54)} - H04W 72/04: Wireless resource allocation - H04W 72/12: Wireless traffic scheduling - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/53: based on regulatory allocation policies - 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 The present disclosure provides a downlink control channel detection method, a terminal, and a Base Station (BS). The method includes: obtaining first and second auxiliary information from a BS, in which the first auxiliary information indicates a time-domain duration of a Control Resource Set (CORESET) of a downlink control channel, which is allocated by the BS, the second auxiliary information indicates a resource mapping mode from a Resource Element Group (REG) of CORESET to Control Channel Elements (CCE); performing a blind detection on the downlink control channel, based on the first and second auxiliary information. ## Claims ### Claim 1 A downlink control channel detection method, applied to a terminal, comprising: obtaining first auxiliary information and second auxiliary information, wherein the first auxiliary information indicates a time-domain duration of a control resource set of a downlink control channel, which is allocated by a base station, the second auxiliary information indicates a resource mapping mode from a resource element group (REG) of the control resource set to a control channel elements (CCE); and, performing a blind detection on the downlink control channel, based on the first auxiliary information and the second auxiliary information; wherein performing the blind detection on the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: determining a blind-detection priority of each control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information; and, performing the blind detection on the downlink control channel, based on the blind-detection priority of each control resource set; wherein determining the blind-detection priority of each control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: when N indicated by the first auxiliary information is greater than or equal to a fourth index M4, determining that the blind-detection priority of the control resource set of the downlink control channel is a high priority; when N indicated by the first auxiliary information is less than M4, determining that the blind-detection priority of the control resource set of the downlink control channel is a low priority, wherein N is the quantity of time-domain symbols occupied by the control resource set, M4 is an index of the last OFDM symbol in a pre-allocated control resource set, which is pre-allocated by the base station, indexes of the OFDM symbols in the pre-allocated control resource set start from 1, M4 and N are both integers. ### Claim 2 (depends on 1) The method according to claim 1, wherein in the step of obtaining first auxiliary information and second auxiliary information, obtaining the first auxiliary information comprises: receiving the first auxiliary information from the base station, via a common physical downlink control channel (PDCCH), or other control channels; or, in the step of obtaining first auxiliary information and second auxiliary information, obtaining the second auxiliary information comprises: obtaining the second auxiliary information in a predefined way, or receiving the second auxiliary information which is configured and transmitted by the base station. ### Claim 3 (depends on 1) The method according to claim 1, wherein performing the blind detection on the downlink control channel, based on the first and second auxiliary information, comprises: performing the blind detection on all the resources, or some resources of at least one control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information. ### Claim 4 (depends on 3) The method according to claim 3, wherein performing the blind detection on all the resources, or some resources of at least one control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information comprises: when N indicated by the first auxiliary information is less than a first index M1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is time-domain first, giving up the blind detection on all the resources of the control resource set; when N indicated by the first auxiliary information is greater than or equal to the first index M1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is time-domain first, performing the blind detection on all the resources of the control resource set; wherein N is the quantity of time-domain symbols occupied by the control resource set, M1 is an index of the last Orthogonal Frequency Division Multiplexing (OFDM) symbol in a pre-allocated control resource set, which is pre-allocated by the base station, indexes of OFDM symbols in the pre-allocated control resource set start from 1, M1 and N are both integers. ### Claim 5 (depends on 3) The method according to claim 3, wherein performing the blind detection on all the resources, or some resources of at least one control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information comprises: when N indicated by the first auxiliary information is less than a first index Q1+1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is time-domain first, giving up the blind detection on all the resources of the control resource set; when N indicated by the first auxiliary information is greater than or equal to Q1+1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is time-domain first, performing the blind detection on all the resources of the control resource set, wherein N is the quantity of time-domain symbols occupied by the control resource set, Q1 is an index of the last OFDM symbol in a pre-allocated control resource set, which is pre-allocated by the base station, indexes of OFDM symbols in the pre-allocated control resource set start from 0, M1 and N are both integers. ### Claim 6 (depends on 3) The method according to claim 3, wherein performing the blind detection on all the resources, or some resources of at least one control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: when N indicated by the first auxiliary information is less than a second index indexM2, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, giving up the blind detection on all the resources of the control resource set; when N indicated by the first auxiliary information is greater than or equal to M2 and is less than a third index M3, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on some resources occupied by the control resource set; when N indicated by the first auxiliary information is greater than or equal to M3, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on all the resources occupied by the control resource set; wherein N is the quantity of time-domain symbols occupied by the control resource set, M2 is an index of the first OFDM symbol in a pre-allocated control resource set, which is pre-allocated by the base station, M3 is an index of the last OFDM symbol in the pre-allocated control resource set, indexes of OFDM symbols in the pre-allocated control resource set start from 1, M2, M3 and N are all integers. ### Claim 7 (depends on 6) The method according to claim 6, wherein when N indicated by the first auxiliary information is greater than or equal to M2 and is less than the third index M3, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on some resources occupied by the control resource set, comprises: when N indicated by the first auxiliary information is greater than or equal to M2 and is less than the third index M3, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on M2-th to N-th OFDM symbols in the control resource set. ### Claim 8 (depends on 3) The method according to claim 3, wherein performing the blind detection on all the resources, or some resources of at least one control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information comprises: when N indicated by the first auxiliary information is less than a second index Q2, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, giving up the blind detection on all the resources of the control resource set; when N indicated by the first auxiliary information is greater than or equal to Q2 and is less than a third index Q3+1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on some resources occupied by the control resource set; when N indicated by the first auxiliary information is greater than or equal to Q3+1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on all the resources occupied by the control resource set, wherein N is the quantity of time-domain symbols occupied by the control resource set, Q2 is an index of the first OFDM symbol in a pre-allocated control resource set, which is pre-allocated by the base station, Q3 is an index of the last OFDM symbol in the pre-allocated control resource set, indexes of OFDM symbols in the pre-allocated control resource set start from 0, Q2, Q3 and N are all integers. ### Claim 9 (depends on 8) The method according to claim 8, wherein when N indicated by the first auxiliary information is greater than or equal to Q2 and is less than the third index Q3+1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on some resources occupied by the control resource set comprises: when N indicated by the first auxiliary information is greater than or equal to Q2 and is less than a third index Q3+1, and the second auxiliary information indicates that the resource mapping mode from REG of control resource set to CCE is frequency-domain first, performing the blind detection on Q2-th to N-th OFDM symbols in the control resource set. ### Claim 10 (depends on 1) The method according to claim 1, wherein performing the blind detection on the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: obtaining fourth auxiliary information from the base station, wherein the fourth auxiliary information indicates a blind-detection and aggregation-level configuration of each control resource set of the downlink control channel; and, performing the blind detection on the downlink control channel, based on the first auxiliary information, the second auxiliary information and the fourth auxiliary information. ### Claim 11 A terminal, comprising a processor, a memory, and a computer program stored in the memory, wherein the computer program is executable by the processor, when the computer program is executed by the processor, the processor is caused to perform: obtaining first auxiliary information and second auxiliary information, wherein the first auxiliary information indicates a time-domain duration of a control resource set of a downlink control channel, which is allocated by a base station, the second auxiliary information indicates a resource mapping mode from a resource element group (REG) of the control resource set to a control channel elements (CCE); and, performing a blind detection on the downlink control channel, based on the first auxiliary information and the second auxiliary information; wherein performing the blind detection on the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: determining a blind-detection priority of each control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information; and, performing the blind detection on the downlink control channel, based on the blind-detection priority of each control resource set; wherein determining the blind-detection priority of each control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: when N indicated by the first auxiliary information is greater than or equal to a fourth index M4, determining that the blind-detection priority of the control resource set of the downlink control channel is a high priority; when N indicated by the first auxiliary information is less than M4, determining that the blind-detection priority of the control resource set of the downlink control channel is a low priority, wherein N is the quantity of time-domain symbols occupied by the control resource set, M4 is an index of the last OFDM symbol in a pre-allocated control resource set, which is pre-allocated by the base station, indexes of the OFDM symbols in the pre-allocated control resource set start from 1, M4 and N are both integers. ### Claim 12 (depends on 11) The terminal according to claim 11, wherein the processor is configured to receive the first auxiliary information from the base station, via a common physical downlink control channel (PDCCH), or other control channels. ### Claim 13 (depends on 11) The terminal according to claim 11, wherein the processor is configured to obtain the second auxiliary information in a predefined way, or receive the second auxiliary information which is configured and transmitted by the base station. ### Claim 14 (depends on 11) The terminal according to claim 11, wherein the processor is configured to, obtain fourth auxiliary information from the base station, wherein the fourth auxiliary information indicates a blind-detection and aggregation-level configuration of each control resource set of the downlink control channel; and, perform the blind detection on the downlink control channel, based on the first auxiliary information, the second auxiliary information and the fourth auxiliary information. ### Claim 15 (depends on 11) The terminal according to claim 11, wherein the processor is configured to, perform the blind detection on all the resources, or some resources of at least one control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information. ### Claim 16 A terminal, comprising a processor, a memory, and a computer program stored in the memory, wherein the computer program is executable by the processor, when the computer program is executed by the processor, the processor is caused to perform: obtaining first auxiliary information and second auxiliary information, wherein the first auxiliary information indicates a time-domain duration of a control resource set of a downlink control channel, which is allocated by a base station, the second auxiliary information indicates a resource mapping mode from a resource element group (REG) of the control resource set to a control channel elements (CCE); and, performing a blind detection on the downlink control channel, based on the first auxiliary information and the second auxiliary information; wherein performing the blind detection on the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: determining a blind-detection priority of each control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information; and, performing the blind detection on the downlink control channel, based on the blind-detection priority of each control resource set; wherein determining the blind-detection priority of each control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information, comprises: when N indicated by the first auxiliary information is greater than or equal to a fourth index Q4+1, determining that the blind-detection priority of the control resource set of the downlink control channel is a high priority; and, when N indicated by the first auxiliary information is less than Q4+1, determining that the blind-detection priority of the control resource set of the downlink control channel is a low priority, wherein N is the quantity of time-domain symbols occupied by the control resource set, Q4 is the index of the last OFDM symbol in a pre-allocated control resource set, which is pre-allocated by the base station, indexes of OFDM symbols in a second pre-allocated control resource set start from 0, Q4 and N are both integers. ### Claim 17 (depends on 16) The terminal according to claim 16, wherein the processor is configured to receive the first auxiliary information from the base station, via a common physical downlink control channel (PDCCH), or other control channels. ### Claim 18 (depends on 16) The terminal according to claim 16, wherein the processor is configured to obtain the second auxiliary information in a predefined way, or receive the second auxiliary information which is configured and transmitted by the base station. ### Claim 19 (depends on 16) The terminal according to claim 16, wherein the processor is configured to, obtain fourth auxiliary information from the base station, wherein the fourth auxiliary information indicates a blind-detection and aggregation-level configuration of each control resource set of the downlink control channel; and, perform the blind detection on the downlink control channel, based on the first auxiliary information, the second auxiliary information and the fourth auxiliary information. ### Claim 20 (depends on 16) The terminal according to claim 16, wherein the processor is configured to, perform the blind detection on all the resources, or some resources of at least one control resource set of the downlink control channel, based on the first auxiliary information and the second auxiliary information.