# US 2020/0288334 A1 · User terminal and radio communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288334 A1 - Document ID: US20200288334A1 - Status: Published application - Kind: A1 - Application number: 16/646,066 - Filed: 2017-09-11 - Published: 2020-09-10 - Earliest claimed: 2017-09-11 - Assignees: Ntt Docomo, Inc. - Applicants: Ntt Docomo, Inc. - Inventors: Kazuki Takeda; Satoshi Nagata; Chongning Na; Min Liu - Web page: https://patentgrep.com/patent/US20200288334A1 ## 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 24/04: Arrangements for maintaining operational condition - H04B 7/06964: {Re-selection of one or more beams after beam failure} - H04B 7/06968: {using quasi-colocation [QCL] between signals} - 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 5/10: with dynamo-electric generation of carriers; with mechanical filters or demodulators - H04W 16/28: using beam steering - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 56/001: {Synchronization between nodes} - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 The present disclosure is designed to properly control RLM when beam recovery procedures are expected to be executed. In accordance with one aspect of the present invention, a user terminal has a receiving section that receives information about a hypothetical downlink control channel, and a control section that controls, based on the information, monitoring of radio link quality of a downlink signal in a first set, which is assumed to be quasi-co-located (in QCL) with a demodulation reference signal for a downlink control channel, and/or radio link quality of a downlink signal in a second set, which is configured by a radio base station. ## Claims ### Claim 1 A user terminal comprising: a receiving section that receives information about a hypothetical downlink control channel; and a control section that controls, based on the information, monitoring of radio link quality of a downlink signal in a first set, which is assumed to be quasi-co-located (in QCL) with a demodulation reference signal for a downlink control channel, and/or radio link quality of a downlink signal in a second set, which is configured by a radio base station. ### Claim 2 (depends on 1) The user terminal according to claim 1, wherein the control section determines a first threshold and/or a second threshold, which correspond to given block error rates of the hypothetical downlink control channel, based on the information, and controls beam failure detection based on at least one of the first threshold, the radio link quality of the downlink signal in the first set, and the radio link quality of the downlink signal in the second set. ### Claim 3 (depends on 1) The user terminal according to claim 1, wherein the control section determines, based on the information, a third threshold and/or a fourth threshold, which correspond to given block error rates of the hypothetical downlink control channel, and controls detection of a new candidate beam based on at least one of the fourth threshold, the radio link quality of the downlink signal in the first set, and the radio link quality of the downlink signal in the second set. ### Claim 4 (depends on 1) The user terminal according to claim 1, wherein the information includes at least one of information that shows a specific set of control resources, information that shows a specific aggregation level, information that shows a format of downlink control information, information that shows a pattern of the demodulation reference signal, and information that shows the given block error rates. ### Claim 5 (depends on 1) The user terminal according to claim 1, wherein the DL signal comprises a reference signal for measuring channel state information and/or at least one of a primary synchronization signal, a secondary synchronization signal and a demodulation reference signal for the broadcast channel in a given signal block. ### Claim 6 A radio communication method comprising, in a user terminal, the steps of: receiving information about a hypothetical downlink control channel; and controlling, based on the information, monitoring of radio link quality about a downlink signal in a first set, which is assumed to be quasi-co-located (in QCL) with a demodulation reference signal for a downlink control channel, and/or a downlink signal in a second set, which is configured by a radio base station. ### Claim 7 (depends on 2) The user terminal according to claim 2, wherein the control section determines, based on the information, a third threshold and/or a fourth threshold, which correspond to given block error rates of the hypothetical downlink control channel, and controls detection of a new candidate beam based on at least one of the fourth threshold, the radio link quality of the downlink signal in the first set, and the radio link quality of the downlink signal in the second set. ### Claim 8 (depends on 2) The user terminal according to claim 2, wherein the information includes at least one of information that shows a specific set of control resources, information that shows a specific aggregation level, information that shows a format of downlink control information, information that shows a pattern of the demodulation reference signal, and information that shows the given block error rates. ### Claim 9 (depends on 3) The user terminal according to claim 3, wherein the information includes at least one of information that shows a specific set of control resources, information that shows a specific aggregation level, information that shows a format of downlink control information, information that shows a pattern of the demodulation reference signal, and information that shows the given block error rates. ### Claim 10 (depends on 2) The user terminal according to claim 2, wherein the DL signal comprises a reference signal for measuring channel state information and/or at least one of a primary synchronization signal, a secondary synchronization signal and a demodulation reference signal for the broadcast channel in a given signal block. ### Claim 11 (depends on 3) The user terminal according to claim 3, wherein the DL signal comprises a reference signal for measuring channel state information and/or at least one of a primary synchronization signal, a secondary synchronization signal and a demodulation reference signal for the broadcast channel in a given signal block.