# US 12,764,759 B2 · Methods and apparatus of monitoring behaviour determination for overlapping ePDCCH and CSI-RS, SSB, PDSCH, and/or PDCCH > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,764,759 B2 - Document ID: US12764759B2 - Status: Granted - Kind: B2 - Application number: 18/707,440 - Filed: 2021-11-04 - Published: 2026-06-04 - Granted: 2026-10-13 - Earliest claimed: 2021-11-04 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Yi Zhang; Chenxi Zhu; Wei Ling; Bingchao Liu; Lingling Xiao - Web page: https://patentgrep.com/patent/US12764759B2 ## CPC - 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) ## Abstract Methods and apparatus of monitoring behaviour determination for overlapping ePDCCH and CSI-RS/SSB/PDSCH/PDCCH are disclosed. The method includes: receiving, by a receiver, a configuration for a transmission of enhanced Physical Downlink Control Channel (ePDCCH) with two Transmission Configuration Indication (TCI) states including two Quasi Co-Location Type D (QCL-TypeD) properties; and determining, by a processor, a monitoring behaviour based on a QCL-TypeD assumption and/or a predefined priority rule, wherein at least one symbol of the ePDCCH overlaps with a transmission of Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB), Physical Downlink Shared Channel (PDSCH), and/or Physical Downlink Control Channel (PDCCH). ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a configuration for a transmission of enhanced Physical Downlink Control Channel (ePDCCH) with two Transmission Configuration Indication (TCI) states including two Quasi Co-Location Type D (QCL-TypeD) properties; and determine a monitoring behaviour based on one or more of a QCL-TypeD assumption or a predefined priority rule, at least one symbol of the ePDCCH overlapping with one or more of a transmission of Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB), Physical Downlink Shared Channel (PDSCH), or Physical Downlink Control Channel (PDCCH). ### Claim 2 (depends on 1) The UE of claim 1, wherein the at least one processor is configured to cause the UE to transmit the ePDCCH with one or more of: two Control Resource Sets (CORESETs), each associated with one TCI state including one QCL-TypeD property, with repetition; or one CORESET with two TCI states including two QCL-TypeD properties for Single Frequency Network (SFN) based ePDCCH. ### Claim 3 (depends on 1) The UE of claim 1, wherein the QCL-TypeD assumption comprises that the CSI-RS and one PDCCH Demodulation Reference Signal (DM-RS) port transmitted in one or more monitored search space sets associated with one or more Control Resource Sets (CORESETs) of the ePDCCH are quasi co-located with QCL-TypeD. ### Claim 4 (depends on 1) The UE of claim 1, wherein the QCL-TypeD assumption comprises that a QCL-TypeD property for the CSI-RS is as indicated by Radio Resource Control (RRC) signalling. ### Claim 5 (depends on 1) The UE of claim 1, wherein the QCL-TypeD assumption comprises that a QCL-TypeD property for the CSI-RS is one specific QCL-TypeD property for one or more Control Resource Sets (CORESETs) associated with one or more monitored search space sets of the ePDCCH. ### Claim 6 (depends on 5) The UE of claim 5, wherein the specific QCL-TypeD property comprises one or more of a first TCI state from a CORESET associated with a first search space set among two configured linked search space sets or a first TCI state from two activated TCI from a CORESET. ### Claim 7 (depends on 1) The UE of claim 1, wherein a higher priority is assigned to the ePDCCH than the CSI-RS; and the UE is not expected to detect the CSI-RS, wherein the ePDCCH overlaps with the CSI-RS and a QCL-TypeD property for the CSI-RS is not configured as one or more of the two QCL-TypeD properties. ### Claim 8 (depends on 1) The UE of claim 1, wherein the CSI-RS comprises an aperiodic CSI-RS; a higher priority is assigned for the CSI-RS than the ePDCCH; and the UE is not expected to monitor the ePDCCH, wherein the ePDCCH overlaps with the CSI-RS and a QCL-TypeD property for the CSI-RS is not configured as one or more of the two QCL-TypeD properties. ### Claim 9 (depends on 1) The UE of claim 1, wherein the QCL-TypeD assumption comprises that the SSB and one or more of an ePDCCH Demodulation Reference Signal (DM-RS), or an ePDCCH DM-RS port transmitted in one or more monitored search space sets associated with CORESET are quasi co-located or indirectly quasi co-located with QCL-TypeD. ### Claim 10 (depends on 1) The UE of claim 1, wherein a higher priority is assigned for the SSB than the ePDCCH, and the UE is not expected to monitor the ePDCCH, wherein the ePDCCH overlaps with the SSB and a QCL-TypeD property for the SSB is not configured as one or more of the two QCL-TypeD properties. ### Claim 11 (depends on 1) The UE of claim 1, wherein the QCL-TypeD assumption comprises that the PDSCH and one or more PDCCH Demodulation Reference Signal (DM-RS) ports transmitted in one or more monitored search space sets associated with one or more Control Resource Sets (CORESETs) of the ePDCCH are quasi co-located with QCL-TypeD. ### Claim 12 (depends on 1) The UE of claim 1, wherein a higher priority is assigned for the PDSCH than the ePDCCH, and the UE is not expected to monitor the ePDCCH, wherein the ePDCCH overlaps with the PDSCH and a QCL-TypeD property for the PDSCH is not configured as one or more of the two QCL-TypeD properties; and the PDSCH is scheduled by a PDCCH associated with Type1 Common Search Space (CSS). ### Claim 13 (depends on 1) The UE of claim 1, wherein the ePDCCH is associated with Type 3 Common Search Space (CSS); and the QCL-TypeD assumption comprises that the PDCCH Demodulation Reference Signal (DM-RS) port transmitted in monitored Type 1 CSS and one PDCCH DM-RS port transmitted in one or more monitored search space sets associated with one or more Control Resource Sets (CORESETs) of the ePDCCH are quasi co-located with QCL-TypeD, wherein the PDCCH for Type 1 CSS overlaps with the ePDCCH. ### Claim 14 (depends on 1) The UE of claim 1, wherein the ePDCCH is associated with Type 3 Common Search Space (CSS); a higher priority is assigned for monitoring PDCCH for Type 1 CSS than the ePDCCH; and the UE is not expected to monitor the ePDCCH wherein the PDCCH for Type1 CSS overlaps with the ePDCCH, and a QCL-TypeD property for the PDCCH for Type1 CSS is not configured as one or more of the two QCL-TypeD properties. ### Claim 15 (depends on 14) The UE of claim 14, wherein the UE is expected to monitor a linked candidate of the ePDCCH that is not dropped, and to interpret DCI based on a reference PDCCH candidate. ### Claim 16 A processor for wireless communication, comprising: at least one controller coupled with at least one memory and configured to cause the processor to: receive a configuration for a transmission of enhanced Physical Downlink Control Channel (ePDCCH) with two Transmission Configuration Indication (TCI) states including two Quasi Co-Location Type D (QCL-TypeD) properties; and determine a monitoring behaviour based on one or more of a QCL-TypeD assumption or a predefined priority rule, at least one symbol of the ePDCCH overlapping with one or more of a transmission of Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB), Physical Downlink Shared Channel (PDSCH), or Physical Downlink Control Channel (PDCCH). ### Claim 17 (depends on 16) The processor of claim 16, wherein the at least one controller is configured to cause the processor to transmit the ePDCCH with one or more of: two Control Resource Sets (CORESETs), each associated with one TCI state including one QCL-TypeD property, with repetition; or one CORESET with two TCI states including two QCL-TypeD properties for Single Frequency Network (SFN) based ePDCCH. ### Claim 18 A method performed by a user equipment (UE), the method comprising: receiving a configuration for a transmission of enhanced Physical Downlink Control Channel (ePDCCH) with two Transmission Configuration Indication (TCI) states including two Quasi Co-Location Type D (QCL-TypeD) properties; and determining a monitoring behaviour based on one or more of a QCL-TypeD assumption or a predefined priority rule, at least one symbol of the ePDCCH overlapping with one or more of a transmission of Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB), Physical Downlink Shared Channel (PDSCH), or Physical Downlink Control Channel (PDCCH). ### Claim 19 (depends on 18) The method of claim 18, further comprising transmitting the ePDCCH with one or more of: two Control Resource Sets (CORESETs), each associated with one TCI state including one QCL-TypeD property, with repetition; or one CORESET with two TCI states including two QCL-TypeD properties for Single Frequency Network (SFN) based ePDCCH. ### Claim 20 A network equipment (NE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the NE to: transmit a configuration for a transmission of enhanced Physical Downlink Control Channel (ePDCCH) with two Transmission Configuration Indication (TCI) states including two Quasi Co-Location Type D (QCL-TypeD) properties; and determine a monitoring behaviour of a remote device based on one or more of a QCL-TypeD assumption or a predefined priority rule, at least one symbol of the ePDCCH overlapping with one or more of a transmission of Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB), Physical Downlink Shared Channel (PDSCH), or Physical Downlink Control Channel (PDCCH).