# US 2021/0344433 A1 · Radio Link Monitoring (RLM) Enhancements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0344433 A1 - Document ID: US20210344433A1 - Status: Published application - Kind: A1 - Application number: 17/284,231 - Filed: 2019-10-09 - Published: 2021-11-04 - Earliest claimed: 2018-10-10 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Qiming LI; Hua LI; Manasa RAGHAVAN; Jie CUI; Yang TANG - Web page: https://patentgrep.com/patent/US20210344433A1 ## CPC - H04B 17/373: Predicting channel quality {or other radio frequency [RF]} parameters - H04L 5/0023: {Time-frequency-space} - 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)} - 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} - H04L 43/0823: Errors, e.g. transmission errors - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/001: {the frequencies being arranged in component carriers} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Methods, systems, and storage media are described for the Embodiments discussed herein may relate to enhancements to radio link monitoring (RLM) for new radio (NR) systems. Other embodiments may be described and/or claimed. ## Claims ### Claim 1 An apparatus comprising: memory to store configuration information for a radio link monitoring-reference signal (RLM-RS) resource; and processing circuitry, coupled with the memory, to: retrieve the configuration information from memory; determine, based on the configuration information, that the RLM-RS resource is configured for quasi co-location (QCL) Type D with more than one control resource set (CORESET); and determine, based on the RLM-RS resource being configured for QCL Type D with more than one CORESET, a physical downlink control channel (PDCCH) parameter for radio link monitoring (RLM). ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the PDCCH parameter is determined based on a single CORESET, and wherein the single CORESET is the only CORESET used by the apparatus for PDCCH monitoring. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the PDCCH parameter is determined based on a CORSET having a lowest index among a plurality of CORESETs used by the apparatus for PDCCH monitoring. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the PDCCH parameter is determined based on a CORSET having a highest index among a plurality of CORESETs used by the apparatus for PDCCH monitoring. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the PDDCH parameter is determined based on a CORESET having a minimum hypothetical PDCCH block error rate (BLER) among a plurality of CORSETs used by the apparatus for PDCCH monitoring. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the PDDCH parameter is determined based on a CORESET having a maximum hypothetical PDCCH block error rate (BLER) among a plurality of CORSETs used by the apparatus for PDCCH monitoring. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the processing circuitry is further to perform RLM based on the determined PDCCH parameter. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the apparatus is a user equipment (UE) or a portion thereof. ### Claim 9 One or more computer-readable media storing instructions that, when executed by one or more processors, cause a user equipment (UE) to: determine that a radio link monitoring-reference signal (RLM-RS) resource is configured for quasi co-location (QCL) Type D with more than one control resource set (CORESET); determine, based on the RLM-RS resource being configured for QCL Type D with more than one CORESET, a physical downlink control channel (PDCCH) parameter for radio link monitoring (RLM); and perform RLM based on the determined PDCCH parameter. ### Claim 10 (depends on 8) The one or more computer-readable media of claim 8, wherein the PDCCH parameter is determined based on a single CORESET, and wherein the single CORESET is the only CORESET used by the apparatus for PDCCH monitoring. ### Claim 11 (depends on 8) The one or more computer-readable media of claim 8, wherein the PDCCH parameter is determined based on a CORSET having a lowest index among a plurality of CORESETs used by the apparatus for PDCCH monitoring. ### Claim 12 (depends on 8) The one or more computer-readable media of claim 8, wherein the PDCCH parameter is determined based on a CORSET having a highest index among a plurality of CORESETs used by the apparatus for PDCCH monitoring. ### Claim 13 (depends on 8) The one or more computer-readable media of claim 8, wherein the PDDCH parameter is determined based on a CORESET having a minimum hypothetical PDCCH block error rate (BLER) among a plurality of CORSETs used by the apparatus for PDCCH monitoring. ### Claim 14 (depends on 8) The one or more computer-readable media of claim 8, wherein the PDDCH parameter is determined based on a CORESET having a maximum hypothetical PDCCH block error rate (BLER) among a plurality of CORSETs used by the apparatus for PDCCH monitoring. ### Claim 15 A user equipment (UE) comprising: memory to store: information associated with a radio link monitoring-reference signal (RLM-RS) resource; and processing circuitry, coupled with the memory, to: determine, based on the information associated with the RLM-RS resource, that the RLM-RS resource is configured for quasi co-location (QCL) Type D with more than one control resource set (CORESET); and determine, based on the RLM-RS resource being configured for QCL Type D with more than one CORESET, a physical downlink control channel (PDCCH) parameter for radio link monitoring (RLM). ### Claim 16 (depends on 15) The UE of claim 15, wherein the PDCCH parameter is determined based on a single CORESET, and wherein the single CORESET is the only CORESET used by the apparatus for PDCCH monitoring. ### Claim 17 (depends on 15) The UE of claim 15, wherein the PDCCH parameter is determined based on a CORSET having a lowest index among a plurality of CORESETs used by the apparatus for PDCCH monitoring. ### Claim 18 (depends on 15) The UE of claim 15, wherein the PDCCH parameter is determined based on a CORSET having a highest index among a plurality of CORESETs used by the apparatus for PDCCH monitoring. ### Claim 19 (depends on 15) The UE of claim 15, wherein the PDDCH parameter is determined based on a CORESET having a minimum hypothetical PDCCH block error rate (BLER) among a plurality of CORSETs used by the apparatus for PDCCH monitoring. ### Claim 20 (depends on 15) The UE of claim 15, wherein the PDDCH parameter is determined based on a CORESET having a maximum hypothetical PDCCH block error rate (BLER) among a plurality of CORSETs used by the apparatus for PDCCH monitoring.