# US 12,003,988 B2 · Link monitoring in new radio > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,988 B2 - Document ID: US12003988B2 - Status: Granted - Kind: B2 - Application number: 17/901,493 - Filed: 2022-09-01 - Published: 2022-12-29 - Granted: 2024-06-04 - Earliest claimed: 2019-05-02 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Ali Cagatay Cirik; Esmael Hejazi Dinan; Yunjung Yi; Hua Zhou; Alireza Babaei; Hyoungsuk Jeon - Web page: https://patentgrep.com/patent/US12003988B2 ## CPC - H04L 1/0025: {Transmission of mode-switching indication} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04B 7/06968: {using quasi-colocation [QCL] between signals} - H04B 7/088: {using beam selection} - H04L 1/0026: {Transmission of channel quality indication} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/006: {Quality of the received signal, e.g. BER, SNR, water filling} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 52/0209: {in terminal devices} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/53: based on regulatory allocation policies - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04L 1/0036: {arrangements specific to the receiver} - H04L 1/1896: {ARQ related signaling} - 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) - H04B: TRANSMISSION ## Abstract A wireless device may select, based on a first group of search space sets for monitoring control resource sets (coresets) and a second group of search space sets for monitoring the coresets, reference signals, associated with the first group of search space sets, for link monitoring in both a first mode and a second mode. In the first mode, the first group of search space sets are monitored and the second group of search space sets are unmonitored. In the second mode, the first group of search space sets are unmonitored and the second group of search space sets are monitored. The wireless device may measure, both in the first mode and the second mode, the reference signals for the link monitoring. ## Claims ### Claim 1 A method comprising: selecting, by a wireless device and based on a first group of search space sets for monitoring control resource sets (coresets) and a second group of search space sets for monitoring the coresets, reference signals, associated with and based on monitoring periodicities of the first group of search space sets, for link monitoring in both of a first mode and a second mode, wherein: in the first mode, the first group of search space sets is monitored and the second group of search space sets is unmonitored; and in the second mode, the first group of search space sets is unmonitored and the second group of search space sets is monitored; and measuring, both in the first mode and the second mode, the reference signals for the link monitoring. ### Claim 2 (depends on 1) The method of claim 1, further comprising indicating out-of-synch (OoS) during the measuring based on a quality of the reference signals being worse than a threshold. ### Claim 3 (depends on 1) The method of claim 1, further comprising indicating in-synch (IS) during the measuring based on a quality of the reference signals being better than a threshold. ### Claim 4 (depends on 1) The method of claim 1, further comprising receiving one or more configuration parameters indicating: the coresets; the first group of search space sets; and the second group of search space sets. ### Claim 5 (depends on 4) The method of claim 4, wherein the selecting the reference signals is further based on the one or more configuration parameters not indicating at least one reference signal for the link monitoring. ### Claim 6 (depends on 1) The method of claim 1, further comprising monitoring at least one coreset of the coresets based on the reference signals. ### Claim 7 (depends on 6) The method of claim 6, wherein the monitoring the at least one coreset comprises that one or more demodulation reference signals (DMRS s) of a physical downlink control channel (PDCCH) reception in the at least one coreset are quasi co-located with the reference signals. ### Claim 8 (depends on 6) The method of claim 6, wherein the monitoring the at least one coreset is further based on one or more active transmission configuration indicator (TCI) states of the at least one coreset indicate the reference signals. ### Claim 9 (depends on 1) The method of claim 1, wherein the selecting the reference signals is further based on a plurality of coreset indexes of the coresets. ### Claim 10 A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to: select, based on a first group of search space sets for monitoring control resource sets (coresets) and a second group of search space sets for monitoring the coresets, reference signals, associated with and based on monitoring periodicities of the first group of search space sets, for link monitoring in both of a first mode and a second mode, wherein: in the first mode, the first group of search space sets is monitored and the second group of search space sets is unmonitored; and in the second mode, the first group of search space sets is unmonitored and the second group of search space sets is monitored; and measure, both in the first mode and the second mode, the reference signals for the link monitoring. ### Claim 11 (depends on 10) The wireless device of claim 10, wherein the instructions further cause the wireless device to indicate out-of-synch (OoS) during measurement of the reference signals based on a quality of the reference signals being worse than a threshold. ### Claim 12 (depends on 10) The wireless device of claim 10, wherein the instructions further cause the wireless device to indicate in-synch (IS) during measurement of the reference signals based on a quality of the reference signals being better than a threshold. ### Claim 13 (depends on 10) The wireless device of claim 10, wherein the instructions further cause the wireless device to receive one or more configuration parameters indicating: the coresets; the first group of search space sets; and the second group of search space sets. ### Claim 14 (depends on 13) The wireless device of claim 13, wherein selection of the reference signals is further based on the one or more configuration parameters not indicating at least one reference signal for the link monitoring. ### Claim 15 (depends on 10) The wireless device of claim 10, wherein the instructions further cause the wireless device to monitor at least one coreset of the coresets based on the reference signals. ### Claim 16 (depends on 15) The wireless device of claim 15, wherein monitoring the at least one coreset comprises that one or more demodulation reference signals (DMRSs) of a physical downlink control channel (PDCCH) reception in the at least one coreset are quasi co-located with the reference signals. ### Claim 17 (depends on 15) The wireless device of claim 15, wherein monitoring the at least one coreset is further based on one or more active transmission configuration indicator (TCI) states of the at least one coreset indicate the reference signals. ### Claim 18 (depends on 10) The wireless device of claim 10, wherein selection of the reference signals is further based on a plurality of coreset indexes of the coresets.