# US 12,604,308 B2 · Search space configuration method and apparatus, and device and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,308 B2 - Document ID: US12604308B2 - Status: Granted - Kind: B2 - Application number: 18/222,647 - Filed: 2023-07-17 - Published: 2023-11-09 - Granted: 2026-04-14 - Earliest claimed: 2021-03-30 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Bin Liang; Jing Xu; Zhe Fu - Web page: https://patentgrep.com/patent/US12604308B2 ## CPC - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/232: the control data signalling from the physical layer, e.g. DCI signalling - 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 application relates to the field of mobile communications. Disclosed are a search space configuration method and apparatus, and a device and a storage medium. The method comprises: receiving configuration signaling sent by a network device, wherein the configuration signaling is used to configure at least one first search space for a first cell to schedule a second cell across carriers, wherein the second cell is a self-scheduling cell; and detecting downlink control information in the at least one first search space. When the second cell supports self-scheduling, the second cell can also be scheduled by the first cell. Therefore, the manners of configuring a search space group of a cell are increased, and the cell scheduling manners are also increased, thereby improving the communication effect. ## Claims ### Claim 1 A method for configuring a search space, applied to a terminal device, wherein the method comprises: receiving a configuration signaling sent by a network device, wherein the configuration signaling is used for configuring at least one first search space for cross-carrier scheduling a second cell by a first cell, and the second cell is a self-scheduling cell; and detecting downlink control information in the at least one first search space; wherein the configuration signaling is further used for releasing at least one third search space, and the at least one third search space is used for cross-carrier scheduling the second cell by the first cell, or the at least one third search space is used for the second cell to schedule the second cell, wherein the at least one third search space belongs to a first releasing space group; wherein the configuration signaling is further used for releasing at least one fourth search space; in response to that the at least one third search space is used for cross-carrier scheduling the second cell by the first cell, the at least one fourth search space is used for the second cell to schedule the second cell; or, in response to that the at least one third search space is used for the second cell to schedule the second cell, the at least one fourth search space is used for the first cell to schedule the second cell, wherein the at least one fourth search space belongs to the first releasing space group. ### Claim 2 (depends on 1) The method according to claim 1, wherein the at least one first search space belongs to a first search space group. ### Claim 3 (depends on 2) The method according to claim 2, wherein the configuration signaling is further used for configuring at least one second search space, and the at least one second search space is used for the second cell to schedule the second cell. ### Claim 4 (depends on 3) The method according to claim 3, wherein the at least one second search space belongs to the first search space group. ### Claim 5 (depends on 4) The method according to claim 4, wherein index identifiers of any two search spaces in the at least one first search space and the at least one second search space are different; or, index identifiers of at least two search spaces in the at least one first search space and the at least one second search space are the same. ### Claim 6 (depends on 5) The method according to claim 5, wherein the configuration signaling comprises first state indication information of the at least one first search space, or first carrier indication information, and second state indication information of the at least one second search space, or second carrier indication information; wherein the first state indication information is used for indicating that the first search space carries downlink control information used for cross-carrier scheduling the second cell by the first cell, and the second state indication information is used for indicating that the second search space carries downlink control information for the second cell to schedule the second cell; wherein the first carrier indication information is used for indicating a carrier where the first search space is located, and the second carrier indication information is used for indicating a carrier where the second search space is located. ### Claim 7 (depends on 1) The method according to claim 1, wherein the configuration signaling comprises an index identifier of the at least one third search space and an index identifier of at least one fourth search space, wherein index identifiers of any two search spaces in the at least one third search space and the at least one fourth search space are different; or, index identifiers of at least two search spaces in the at least one third search space and the at least one fourth search space are the same. ### Claim 8 (depends on 1) The method according to claim 1, wherein the first cell is an Scell, and the second cell is a Pcell; or, the first cell is an Scell, and the second cell is an Scell; or, the first cell is a Pcell, and the second cell is an Scell. ### Claim 9 An apparatus for configuring a search space, arranged in a network device, wherein the apparatus comprises: a processor; a transceiver connected to the processor; and a memory for storing an executable program code for the processor; wherein the processor is configured to load and execute the executable program code to: send a configuration signaling to a terminal device, wherein the configuration signaling is used for configuring at least one first search space for cross-carrier scheduling a second cell by a first cell, and the second cell is a self-scheduling cell; wherein the terminal device is configured to detect downlink control information in the at least one first search space; the configuration signaling is further used for releasing at least one third search space, and the at least one third search space is used for cross-carrier scheduling the second cell by the first cell, or the at least one third search space is used for the second cell to schedule the second cell, wherein the at least one third search space belongs to a first releasing space group; wherein the configuration signaling is further used for releasing at least one fourth search space; in response to that the at least one third search space is used for cross-carrier scheduling the second cell by the first cell, the at least one fourth search space is used for the second cell to schedule the second cell; or, in response to that the at least one third search space is used for the second cell to schedule the second cell, the at least one fourth search space is used for the first cell to schedule the second cell, wherein the at least one fourth search space belongs to the first releasing space group. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the at least one first search space belongs to a first search space group. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein the configuration signaling is further used for configuring at least one second search space, and the at least one second search space is used for the second cell to schedule the second cell. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the at least one second search space belongs to the first search space group. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein index identifiers of any two search spaces in the at least one first search space and the at least one second search space are different; or, index identifiers of at least two search spaces in the at least one first search space and the at least one second search space are the same. ### Claim 14 (depends on 13) The apparatus according to claim 13, wherein the configuration signaling comprises first state indication information of the at least one first search space, or first carrier indication information, and second state indication information of the at least one second search space, or second carrier indication information; wherein the first state indication information is used for indicating that the first search space carries downlink control information used for cross-carrier scheduling the second cell by the first cell, and the second state indication information is used for indicating that the second search space carries downlink control information used for the second cell to schedule the second cell; wherein the first carrier indication information is used for indicating a carrier where the first search space is located, and the second carrier indication information is used for indicating a carrier where the second search space is located. ### Claim 15 (depends on 9) The apparatus according to claim 9, wherein the configuration signaling comprises an index identifier of the at least one third search space and an index identifier of at least one fourth search space, wherein index identifiers of any two search spaces in the at least one third search space and the at least one fourth search space are different; or, index identifiers of at least two search spaces in the at least one third search space and the at least one fourth search space are the same. ### Claim 16 (depends on 9) The apparatus according to claim 9, wherein the first cell is an Scell, and the second cell is a Pcell; or, the first cell is an Scell, and the second cell is an Scell; or, the first cell is a Pcell, and the second cell is an Scell.