# US 12,004,192 B2 · Methods and devices for configuring and monitoring search space of PDCCH > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,192 B2 - Document ID: US12004192B2 - Status: Granted - Kind: B2 - Application number: 18/098,613 - Filed: 2023-01-18 - Published: 2023-05-18 - Granted: 2024-06-04 - Earliest claimed: 2017-08-11 - Assignees: Vivo Mobile Communication Co., Ltd. - Applicants: Vivo Mobile Communication Co., Ltd. - Inventors: Xueming Pan; Xiaodong Shen; Zichao Ji - Web page: https://patentgrep.com/patent/US12004192B2 ## CPC - 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 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - 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 28/02: Traffic management, e.g. flow control or congestion control - 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 Methods and devices for configuring and monitoring a search space of a PDCCH are provided. The specific solution includes: transmitting PDCCH configuration information to a UE, where the PDCCH configuration information is for indicating at least one search space of a PDCCH of the UE, and the search space is any one of the following types: a common search space; a group common search space, or a UE specific search space. ## Claims ### Claim 1 A network device, comprising: a processor, a memory, and a program stored on the memory and executable by the processor, wherein, when the program is executed by the processor, the following steps are implemented: transmitting physical downlink control channel (PDCCH) configuration information to a user equipment (UE), wherein the PDCCH configuration information is for indicating at least one search space of a PDCCH of the UE, and the search space comprises a group common search space, wherein the search space of the PDCCH is a space in which the UE performs detection of the PDCCH; wherein a starting position of the group common search space of the UE is irrelevant to an identity of the UE. ### Claim 2 (depends on 1) The network device according to claim 1, wherein the group common search space is used by a group including M UEs, one or more group common search spaces correspond to one control resource set, and M is a positive integer greater than or equal to 2. ### Claim 3 (depends on 1) The network device according to claim 1, wherein the search space further comprises at least one of the following types of search spaces: a common search space, or a UE specific search space; wherein types of downlink control information (DCI) transmitted by the network device with the different types of search spaces are different. ### Claim 4 (depends on 3) The network device according to claim 3, wherein the DCI transmitted by the network device with the common search space comprises at least one of: DCI for scheduling system information, DCI for scheduling paging information, or DCI for scheduling a random access response message; or, wherein the DCI transmitted by the network device with the UE specific search space comprises at least one of: DCI for UE-specific scheduling, or DCI for semi-persistent scheduling. ### Claim 5 (depends on 1) The network device according to claim 1, wherein downlink control information (DCI) transmitted by the network device with the group common search space comprises at least one of: DCI for transmitting a group based power control command, DCI for transmitting group based slot format information, or DCI for transmitting group based resource preemption indication. ### Claim 6 (depends on 5) The network device according to claim 5, wherein the PDCCH transmitted with the group common search space has a QCL relationship with a synchronization signal or a group of synchronization signals, and the synchronization signal or the group of synchronization signals are configured by the network device; or, wherein the PDCCH transmitted with the group common search space has a QCL relationship with a channel state information-reference signal (CSI-RS) or a group of CSI-RSs, and the CSI-RS or the group of CSI-RSs are configured by the network device. ### Claim 7 (depends on 4) The network device according to claim 4, wherein the PDCCH transmitted with the common search space has a quasi-co-location (QCL) relationship with a synchronization signal or a group of synchronization signals, and there is a correspondence between the synchronization signal or the group of synchronization signals and a physical broadcast channel (PBCH) configuring a physical resource of the common search space. ### Claim 8 (depends on 6) The network device according to claim 6, wherein: the PDCCH configuration information comprises group common search space position information of the UE, and a position of the group common search space of the UE is irrelevant to the identity of the UE, and wherein the group common search space position information of the UE comprises at least one of: the starting position of the group common search space of the UE, a control channel element (CCE) aggregation level of the group common search space of the UE, or the quantity of PDCCH candidate resources of the group common search space of the UE; or, group common search space position information of the UE is pre-configured by a protocol, and a position of the group common search space of the UE is irrelevant to the identity of the UE, and wherein the group common search space position information of the UE comprises at least one of: the starting position of the group common search space of the UE, a CCE aggregation level of the group common search space of the UE, or the quantity of PDCCH candidate resources of the group common search space of the UE. ### Claim 9 A non-transitory computer readable storage medium, having a program stored thereon, wherein, when the program is executed by a processor, the following steps are implemented: receiving physical downlink control channel (PDCCH) configuration information transmitted by a network device, wherein the PDCCH configuration information is for indicating at least one search space of a PDCCH of a user equipment (UE), the search space comprises a group common search space, wherein the search space of the PDCCH is a space in which the UE performs detection of the PDCCH; and monitoring the search space of the PDCCH of the UE indicated by the PDCCH configuration information, and receiving DCI corresponding to the search space of the PDCCH of the UE; wherein a starting position of the group common search space of the UE is irrelevant to an identity of the UE. ### Claim 10 (depends on 9) The non-transitory computer readable storage medium according to claim 9, wherein the group common search space is used by a group including M UEs, one or more group common search spaces correspond to one control resource set, and M is a positive integer greater than or equal to 2. ### Claim 11 (depends on 9) The non-transitory computer readable storage medium according to claim 9, wherein the search space further comprises at least one of the following types of search spaces: a common search space, or a UE specific search space; wherein types of downlink control information (DCI) transmitted by the network device with the different types of search spaces are different. ### Claim 12 (depends on 11) The non-transitory computer readable storage medium according to claim 11, wherein the receiving the DCI corresponding to the search space of the PDCCH of the UE comprises: receiving DCI corresponding to the common search space, and the receiving the DCI corresponding to the common search space comprises at least one of: receiving DCI for scheduling system information, receiving DCI for scheduling paging information, or, receiving DCI for scheduling a random access response message; or, wherein the receiving the DCI corresponding to the search space of the PDCCH of the UE comprises: receiving DCI corresponding to the UE specific search space, and the receiving the DCI corresponding to the UE specific search space comprises at least one of: receiving DCI for UE-specific scheduling, or, receiving DCI for semi-persistent scheduling. ### Claim 13 (depends on 9) The non-transitory computer readable storage medium according to claim 9, wherein the receiving the DCI corresponding to the search space of the PDCCH of the UE comprises: receiving DCI corresponding to the group common search space, and the receiving the DCI corresponding to the group common search space comprises at least one of: receiving DCI for transmitting a group based power control command, receiving DCI for transmitting group based slot format information, or, receiving DCI for transmitting group based resource preemption indication. ### Claim 14 (depends on 13) The non-transitory computer readable storage medium according to claim 13, wherein the PDCCH transmitted with the group common search space has a QCL relationship with a synchronization signal or a group of synchronization signals, and the synchronization signal or the group of synchronization signals are configured by the network device; or, wherein the PDCCH transmitted with the group common search space has a QCL relationship with a channel state information-reference signal (CSI-RS) or a group of CSI-RSs, and the CSI-RS or the group of CSI-RSs are configured by the network device. ### Claim 15 (depends on 12) The non-transitory computer readable storage medium according to claim 12, wherein the PDCCH transmitted with the common search space has a quasi-co-location (QCL) relationship with a synchronization signal or a group of synchronization signals, and there is a correspondence between the synchronization signal or the group of synchronization signals and a physical broadcast channel (PBCH) configuring a physical resource of the common search space. ### Claim 16 (depends on 14) The non-transitory computer readable storage medium according to claim 14, wherein: the PDCCH configuration information comprises group common search space position information of the UE, and a position of the group common search space of the UE is irrelevant to the identity of the UE, and wherein the group common search space position information of the UE comprises at least one of: the starting position of the group common search space of the UE, a control channel element (CCE) aggregation level of the group common search space of the UE, or the quantity of PDCCH candidate resources of the group common search space of the UE; or, group common search space position information of the UE is pre-configured by a protocol, and a position of the group common search space of the UE is irrelevant to the identity of the UE, and wherein the group common search space position information of the UE comprises at least one of: the starting position of the group common search space of the UE, a CCE aggregation level of the group common search space of the UE, or the quantity of PDCCH candidate resources of the group common search space of the UE. ### Claim 17 A non-transitory computer readable storage medium, having a program stored thereon, wherein, when the program is executed by a processor, the following steps are implemented: transmitting physical downlink control channel (PDCCH) configuration information to a user equipment (UE), wherein the PDCCH configuration information is for indicating at least one search space of a PDCCH of the UE, and the search space comprises a group common search space, wherein the search space of the PDCCH is a space in which the UE performs detection of the PDCCH; wherein a starting position of the group common search space of the UE is irrelevant to an identity of the UE. ### Claim 18 (depends on 17) The non-transitory computer readable storage medium according to claim 17, wherein downlink control information (DCI) transmitted by the network device with the group common search space comprises at least one of: DCI for transmitting a group based power control command, DCI for transmitting group based slot format information, or DCI for transmitting group based resource preemption indication. ### Claim 19 (depends on 18) The non-transitory computer readable storage medium according to claim 18, wherein the PDCCH transmitted with the group common search space has a QCL relationship with a synchronization signal or a group of synchronization signals, and the synchronization signal or the group of synchronization signals are configured by the network device; or, wherein the PDCCH transmitted with the group common search space has a QCL relationship with a channel state information-reference signal (CSI-RS) or a group of CSI-RSs, and the CSI-RS or the group of CSI-RSs are configured by the network device. ### Claim 20 (depends on 19) The non-transitory computer readable storage medium according to claim 19, wherein: the PDCCH configuration information comprises group common search space position information of the UE, and a position of the group common search space of the UE is irrelevant to the identity of the UE, and wherein the group common search space position information of the UE comprises at least one of: the starting position of the group common search space of the UE, a control channel element (CCE) aggregation level of the group common search space of the UE, or the quantity of PDCCH candidate resources of the group common search space of the UE; or, group common search space position information of the UE is pre-configured by a protocol, and a position of the group common search space of the UE is irrelevant to the identity of the UE, and wherein the group common search space position information of the UE comprises at least one of: the starting position of the group common search space of the UE, a CCE aggregation level of the group common search space of the UE, or the quantity of PDCCH candidate resources of the group common search space of the UE.