# US 2019/0357189 A1 · Control information sending method, control information receiving method, access network device, and terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357189 A1 - Document ID: US20190357189A1 - Status: Published application - Kind: A1 - Application number: 16/530,657 - Filed: 2019-08-02 - Published: 2019-11-21 - Earliest claimed: 2017-02-04 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Lixia XUE; Hao SUN; Bingyu QU - Web page: https://patentgrep.com/patent/US20190357189A1 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/0038: {Blind format detection (for detection of modulation format H04L27/0012)} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 8/24: Transfer of terminal data - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - 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 Embodiments of the present disclosure provide control information sending methods, control information receiving methods, and devices. The sending method may include determining, by an access network device, a control channel candidate set corresponding to a terminal device, where the control channel candidate set includes at least one control channel candidate, the at least one control channel candidate includes at least one control channel element, the control channel candidate set is contained in at least one control channel element set, a quantity of control channel elements contained in the control channel element set is greater than or equal to a quantity of control channel elements corresponding to a maximum aggregation level supported by the terminal device. The sending method may further includes sending, by the access network device, control information to the terminal device by using at least one control channel candidate in the control channel candidate set. The control information sending method of the embodiments of the present invention can satisfy requirements of new generation radio communications systems. ## Claims ### Claim 1 A control information receiving method, comprising: determining, by a terminal device, a control channel candidate set corresponding to the terminal device, wherein the control channel candidate set comprises at least one control channel candidate, the at least one control channel candidate comprises at least one control channel element, the control channel candidate set is contained in at least one control channel element set, a quantity of control channel elements contained in the control channel element set is greater than or equal to a quantity of control channel elements corresponding to a maximum aggregation level supported by the terminal device, and control channel candidates in the control channel element set that belong to the control channel candidate set have at least two aggregation levels, or have all aggregation levels within the maximum aggregation level supported by the terminal device; and performing, by the terminal device, detection for the control channel candidate in the control channel candidate set, and receiving control information. ### Claim 2 (depends on 1) The method according to claim 1, wherein each of the at least one control channel candidate element set comprises a plurality of control channel candidates, and a set of one or more of the control channel candidates of the plurality of control channel candidates belong to the control channel candidate set. ### Claim 3 (depends on 2) The method according to claim 2, wherein a quantity of control channel candidates contained in the control channel candidate set is less than or equal to a maximum quantity of blind detections supported by the terminal device; and/or a quantity of control channel candidates of a first aggregation level in the control channel candidate set is less than or equal to a maximum quantity of blind detections supported by the terminal device with respect to the first aggregation level. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: determining, by the terminal device, the control channel candidate set corresponding to the terminal device, in at least one control channel resource set, wherein the at least one control channel resource set comprises a plurality of control channel element sets. ### Claim 5 (depends on 4) The method according to claim 4, wherein the determining the control channel candidate set corresponding to the terminal device comprises: determining, by the terminal device based on one or more of identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset, the at least one control channel element set corresponding to the terminal device; or determining, by the terminal device based on a random function with at least one variable, the at least one control channel element set corresponding to the terminal device, wherein the at least one variable comprises at least one of identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset. ### Claim 6 (depends on 4) The method according to claim 4, wherein the determining the control channel candidate set corresponding to the terminal device comprises: determining, by the terminal device based on one or more of an index of the control channel resource set, identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset, the at least one control channel element set corresponding to the terminal device; or determining, by the terminal device based on a random function with at least one variable, the at least one control channel element set corresponding to the terminal device, wherein the at least one variable comprises at least one of an index of the control channel resource set, identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset. ### Claim 7 (depends on 6) The method according to claim 6, wherein the determining the control channel candidate set corresponding to the terminal device further comprises: determining, by the terminal device based on first configuration information, the control channel candidate set contained in the at least one control channel element set, wherein the first configuration information is notified to the terminal device in advance through higher layer signaling; or determining, by the terminal device based on the identification information of the terminal device and/or a group identifier of a terminal device group to which the terminal device belongs, the control channel candidate set contained in the at least one control channel element set. ### Claim 8 The method according to 1, wherein the maximum aggregation level supported by the terminal device is a maximum aggregation level that is allowed by a capability of the terminal device, or a maximum aggregation level configured by an access network device or the terminal device within a capability of the terminal device. ### Claim 9 A terminal device, comprising: a processor configured to determine a control channel candidate set corresponding to the terminal device, wherein the control channel candidate set comprises at least one control channel candidate, the at least one control channel candidate comprises at least one control channel element, the control channel candidate set is contained in at least one control channel element set, a quantity of control channel elements contained in the control channel element set is greater than or equal to a quantity of control channel elements corresponding to a maximum aggregation level supported by the terminal device, and control channel candidates in the control channel element set that belong to the control channel candidate set have at least two aggregation levels, or have all aggregation levels within the maximum aggregation level supported by the terminal device; and a transceiver configured to perform detection for the control channel candidate in the control channel candidate set, and receive control information. ### Claim 10 (depends on 9) The terminal device according to claim 9, wherein each of the at least one control channel candidate element set comprises a plurality of control channel candidates, and a set of one or more of the control channel candidates of the plurality of control channel candidates belong to the control channel candidate set. ### Claim 11 (depends on 10) The terminal device according to claim 10, wherein a quantity of control channel candidates contained in the control channel candidate set is less than or equal to a maximum quantity of blind detections supported by the terminal device; and/or a quantity of control channel candidates of a first aggregation level in the control channel candidate set is less than or equal to a maximum quantity of blind detections supported by the terminal device with respect to the first aggregation level. ### Claim 12 (depends on 9) The terminal device according to claim 9, wherein the processor is further configured to determine the control channel candidate set corresponding to the terminal device, in at least one control channel resource set, wherein the at least one control channel resource set comprises a plurality of control channel element sets. ### Claim 13 (depends on 12) The terminal device according to claim 12, wherein that the processor is configured to determine the control channel candidate set corresponding to the terminal device comprises: the processor is configured to determine, based on one or more of identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset, the at least one control channel element set corresponding to the terminal device; or the processor is configured to determine, based on a random function with at least one variable, the at least one control channel element set corresponding to the terminal device, wherein the at least one variable comprises at least one of identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset. ### Claim 14 (depends on 12) The terminal device according to claim 12, wherein that the processor is configured to determine the control channel candidate set corresponding to the terminal device comprises: the processor is configured to determine, based on one or more of an index of the control channel resource set, identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset, the at least one control channel element set corresponding to the terminal device; or the processor is configured to determine, based on a random function with at least one variable, the at least one control channel element set corresponding to the terminal device, wherein the at least one variable comprises at least one of an index of the control channel resource set, identification information of the terminal device, the maximum aggregation level supported by the terminal device, slot information, and a first offset. ### Claim 15 (depends on 14) The terminal device according to claim 14, wherein the processor is further configured to: determine, based on first configuration information, the control channel candidate set contained in the at least one control channel element set, wherein the first configuration information is notified to the terminal device in advance through higher layer signaling; or determine, based on the identification information of the terminal device and/or a group identifier of a terminal device group to which the terminal device belongs, the control channel candidate set contained in the at least one control channel element set. ### Claim 16 (depends on 9) The terminal device according to claim 9, wherein the maximum aggregation level supported by the terminal device is a maximum aggregation level that is allowed by a capability of the terminal device, or a maximum aggregation level configured by an access network device or the terminal device within a capability of the terminal device. ### Claim 17 A computer readable storage medium, comprising an instruction, wherein when the instruction runs on a computer, the computer performs a control information receiving method by performing operations, comprising: determining a control channel candidate set corresponding to a terminal device, wherein the control channel candidate set comprises at least one control channel candidate, the at least one control channel candidate comprises at least one control channel element, the control channel candidate set is contained in at least one control channel element set, a quantity of control channel elements contained in the control channel element set is greater than or equal to a quantity of control channel elements corresponding to a maximum aggregation level supported by the terminal device, and control channel candidates in the control channel element set that belong to the control channel candidate set have at least two aggregation levels, or have all aggregation levels within the maximum aggregation level supported by the terminal device; and performing detection for the control channel candidate in the control channel candidate set, and receiving control information. ### Claim 18 (depends on 17) The computer readable storage medium according to claim 17, wherein each of the at least one control channel candidate element set comprises a plurality of control channel candidates, and a set of one or more of the control channel candidates of the plurality of control channel candidates belong to the control channel candidate set. ### Claim 19 (depends on 18) The computer readable storage medium according to claim 18, wherein a quantity of control channel candidates contained in the control channel candidate set is less than or equal to a maximum quantity of blind detections supported by the terminal device; and/or a quantity of control channel candidates of a first aggregation level in the control channel candidate set is less than or equal to a maximum quantity of blind detections supported by the terminal device with respect to the first aggregation level. ### Claim 20 (depends on 17) The computer readable storage medium according to claim 17, further comprising: determining, by the terminal device, the control channel candidate set corresponding to the terminal device, in at least one control channel resource set, wherein the at least one control channel resource set comprises a plurality of control channel element sets.