# US 12,003,986 B2 · Communication method and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,986 B2 - Document ID: US12003986B2 - Status: Granted - Kind: B2 - Application number: 17/402,122 - Filed: 2021-08-13 - Published: 2021-12-30 - Granted: 2024-06-04 - Earliest claimed: 2019-02-15 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jing Han; Xi Zhang; Hong Li; Meng Zhang - Web page: https://patentgrep.com/patent/US12003986B2 ## CPC - H04L 5/0023: {Time-frequency-space} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - 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} - H04W 24/04: Arrangements for maintaining operational condition - H04W 48/16: Discovering, processing access restriction or access information - 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 This application provides a communication method and device. The method includes: A terminal device receives a reference signal from a network device, wherein the reference signal is not in a channel state information-reference signal (CSI-RS) resource set, configured with repetition on; and performs radio link monitoring (RLM) measurement or beam failure detection (BFD) measurement on the reference signal. According to the communication method and device provided in this application, the terminal device expects that the resource configured by the network device for performing BFD or RLM is not any resource in the CSI-RS resource set configured with the repetition on. ## Claims ### Claim 1 A communication method, applied to a communication device, the method comprising: receiving a reference signal from a network device; and in response to the reference signal not being included in a channel state information-reference signal (CSI-RS) resource set that is configured with repetition on, performing radio link monitoring (RLM) measurement or beam failure detection (BFD) measurement on the reference signal; and wherein a CSI-RS resource in the CSI-RS resource set is a periodic resource, and a measurement period T of the CSI-RS resource is based on a preferred number of CSI-RS resource repetitions of the CSI-RS resource set, a quantity of resources in the CSI-RS resource set, and a CSI-RS resource periodicity. ### Claim 2 (depends on 1) The method according to claim 1, wherein the measurement period T is obtained by: measurement period T=m*ceil(max_Number_Rx_Beam/N)*T_res, wherein m is a positive integer greater than o, max_Number_Rx_Beam is the preferred number of CSI-RS resource repetitions of the CSI-RS resource set, N is the quantity of resources in the CSI-RS resource set, and T_res is the CSI-RS resource periodicity. ### Claim 3 (depends on 1) The communication method according to claim 1, wherein performing RLM measurement or BFD measurement on the reference signal comprises: performing RLM measurement on the reference signal. ### Claim 4 (depends on 1) The communication method according to claim 1, wherein performing RLM measurement or BFD measurement on the reference signal comprises: performing BFD measurement on the reference signal. ### Claim 5 (depends on 1) The communication method according to claim 1, wherein the communication device is a terminal device. ### Claim 6 A communication method, applied to a network device, the method comprising: generating a reference signal; and sending the reference signal, wherein when the reference signal is not included in a channel state information-reference signal (CSI-RS) resource set that is configured with repetition on, the reference signal is to be used for radio link monitoring (RLM) measurement or beam failure detection (BFD) measurement; and wherein a CSI-RS resource in the CSI-RS resource set is a periodic resource, and a measurement period T of the CSI-RS resource is based on a preferred number of CSI-RS resource repetitions of the CSI-RS resource set and that is preferred by a communication device, a quantity of resources in the CSI-RS resource set, and a CSI-RS resource periodicity. ### Claim 7 (depends on 6) The method according to claim 6, wherein the measurement period T is obtained by: measurement period T=m*ceil(max_Number_Rx_Beam/N)*T_res, wherein m is a positive integer greater than o, max_Number_Rx_Beam is the preferred number of CSI-RS resource repetitions of the CSI-RS resource set, N is the quantity of resources in the CSI-RS resource set, and T_res is the CSI-RS resource periodicity. ### Claim 8 (depends on 6) The communication method according to claim 6, wherein the reference signal is to be used for RLM measurement by a terminal device. ### Claim 9 (depends on 6) The communication method according to claim 6, wherein the reference signal is to be used for BFD measurement by a terminal device. ### Claim 10 A communication device, comprising: at least one processor, configured to cause the communication device to—: receive a reference signal from a network device; in response to the reference signal not being included in a channel state information-reference signal (CSI-RS) resource set that is configured with repetition on, perform radio link monitoring (RLM) measurement or beam failure detection (BFD) measurement on the reference signal; and wherein a CSI-RS resource of the CSI-RS resource set is a periodic resource, and a measurement period T of the CSI-RS resource is based on a preferred number of CSI-RS resource repetitions of the CSI-RS resource set, a quantity of resources in the CSI-RS resource set, and a CSI-RS resource periodicity. ### Claim 11 (depends on 10) The communication device according to claim 10, wherein the measurement period T is obtained by: measurement period T=m*ceil(max_Number_Rx_Beam/N)*T_res, wherein m is a positive integer greater than o, max_Number_Rx_Beam is the preferred number of CSI-RS resource repetitions of the CSI-RS resource set, N is the quantity of resources in the CSI-RS resource set, and T_res is the CSI-RS resource periodicity. ### Claim 12 (depends on 10) The communication device according to claim 10, wherein the at least one processor being configured to cause the communication device to perform RLM measurement or BFD measurement on the reference signal comprises the at least one processor being configured to cause the communication device to: perform RLM measurement on the reference signal. ### Claim 13 (depends on 10) The communication device according to claim 10, wherein the at least one processor being configured to cause the communication device to perform RLM measurement or BFD measurement on the reference signal comprises the at least one processor being configured to cause the communication device to: perform BFD measurement on the reference signal.