# US 12,192,927 B2 · Cell-specific reference signal configuration method and device, storage medium, base station, and user equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,927 B2 - Document ID: US12192927B2 - Status: Granted - Kind: B2 - Application number: 17/636,748 - Filed: 2020-08-20 - Published: 2022-09-15 - Granted: 2025-01-07 - Earliest claimed: 2019-08-23 - Assignees: Spreadtrum Semiconductor (Nanjing) Co., Ltd. - Applicants: Spreadtrum Semiconductor (Nanjing) Co., Ltd. - Inventors: Runquan Miao; Hualei Wang - Web page: https://patentgrep.com/patent/US12192927B2 ## 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 56/001: {Synchronization between nodes} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 27/2614: {Peak power aspects} - H04L 27/0012: {arrangements for identifying the type of modulation} - H04L 27/18: Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence) - 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 A cell-specific reference signal configuration method and device, a storage medium, a base station, and a UE are provided. The method includes: determining to configure a regular cell-specific reference signal in a current time slot; determining an SSB in the current time slot based on the SSB existing in the current time slot, or determining an SSB in a previous SSB time slot based on an SSB not existing in the current time slot and indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB, or determining the modulation mode of the regular cell-specific reference signal to be a preset modulation mode, wherein a peak-to-average ratio of the modulation mode of the regular cell-specific reference signal isn't greater than that of data to be demodulated by using the regular cell-specific reference signal. ## Claims ### Claim 1 A cell-specific reference signal configuration method, comprising: determining to configure a regular cell-specific reference signal in a current time slot; determining a Synchronization Signal Block (SSB) in the current time slot based on the SSB existing in the current time slot, or determining an SSB in a previous SSB time slot before the current time slot based on an SSB not existing in the current time slot; and indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB, or determining the modulation mode of the regular cell-specific reference signal to be a preset modulation mode, wherein a peak-to-average ratio of the modulation mode of the regular cell-specific reference signal is less than or equal to a peak-to-average ratio of a modulation mode of data to be demodulated by using the regular cell-specific reference signal. ### Claim 2 (depends on 1) The method according to claim 1, wherein said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB comprises: indicating the modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in a Master Information Block (MIB) in the determined SSB. ### Claim 3 (depends on 2) The method according to claim 2, wherein said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the MIB in the determined SSB comprises: adding a new field to the MIB, and carrying the modulation mode indication information in the newly added field, so as to indicate the modulation mode of the regular cell-specific reference signal in the current time slot. ### Claim 4 (depends on 1) The method according to claim 1, wherein the modulation mode indication information comprises a relative time domain position relation between a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in the determined SSB, and said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB comprises: indicating the modulation mode of the regular cell-specific reference signal in the current time slot using the relative time domain position relation between the PSS and the SSS in the determined SSB. ### Claim 5 (depends on 1) The method according to claim 1, wherein prior to indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB, the method further comprises: determining a current channel condition; and determining whether to configure an additional cell-specific reference signal based on the current channel condition. ### Claim 6 (depends on 5) The method according to claim 5, wherein said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB comprises: based on configuring the additional cell-specific reference signal, indicating a modulation mode of the regular cell-specific reference signal and a modulation mode of the additional cell-specific reference signal in the current time slot using the modulation mode indication information in the determined SSB; or based on configuring the additional cell-specific reference signal, determining the modulation mode of the regular cell-specific reference signal to be a preset modulation mode, and indicating a modulation mode of the additional cell-specific reference signal using modulation mode indication information in an additional cell-specific reference signal indication field in the determined SSB. ### Claim 7 (depends on 1) The method according to claim 1, wherein the modulation mode of the regular cell-specific reference signal is selected from a group consisting of π 2 - BPSK and QPSK. ### Claim 8 A cell-specific reference signal determination method, comprises: receiving a Synchronization Signal Block (SSB) in a current time slot based on the SSB existing in the current time slot, or receiving an SSB in a previous SSB time slot before the current time slot based on an SSB not existing in the current time slot; and determining a modulation mode of a regular cell-specific reference signal in the current time slot based on modulation mode indication information in the received SSB, or determining the modulation mode of the regular cell-specific reference signal to be a preset modulation mode, wherein a peak-to-average ratio of the modulation mode of the regular cell-specific reference signal is less than or equal to a peak-to-average ratio of a modulation mode of data to be demodulated by using the regular cell-specific reference signal. ### Claim 9 A non-transitory storage medium storing one or more programs, the one or more programs comprising computer instructions, which, when executed by a processor, cause the processor to: determine to configure a regular cell-specific reference signal in a current time slot; determine a Synchronization Signal Block (SSB) in the current time slot based on the SSB existing in the current time slot, or determining an SSB in a previous SSB time slot before the current time slot based on an SSB not existing in the current time slot; and indicate a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB, or determining the modulation mode of the regular cell-specific reference signal to be a preset modulation mode, wherein a peak-to-average ratio of the modulation mode of the regular cell-specific reference signal is less than or equal to a peak-to-average ratio of a modulation mode of data to be demodulated by using the regular cell-specific reference signal. ### Claim 10 (depends on 1) A base station comprising a memory and a processor, wherein the memory has computer instructions stored therein, and when the processor executes the computer instructions, the method of claim 1 is performed. ### Claim 11 (depends on 8) A User Equipment (UE) comprising a memory and a processor, wherein the memory has computer instructions stored therein, and when the processor executes the computer instructions, the method of claim 8 is performed. ### Claim 12 (depends on 9) The non-transitory storage medium according to claim 9, wherein said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB comprises: indicating the modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in a Master Information Block (MIB) in the determined SSB. ### Claim 13 (depends on 12) The non-transitory storage medium according to claim 12, wherein said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the MIB in the determined SSB comprises: adding a new field to the MIB, and carrying the modulation mode indication information in the newly added field, so as to indicate the modulation mode of the regular cell-specific reference signal in the current time slot. ### Claim 14 (depends on 9) The non-transitory storage medium according to claim 9, wherein the modulation mode indication information comprises a relative time domain position relation between a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in the determined SSB, and said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB comprises: indicating the modulation mode of the regular cell-specific reference signal in the current time slot using the relative time domain position relation between the PSS and the SSS in the determined SSB. ### Claim 15 (depends on 9) The non-transitory storage medium according to claim 9, wherein prior to indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB, the processor is further caused to: determine a current channel condition; and determine whether to configure an additional cell-specific reference signal based on the current channel condition. ### Claim 16 (depends on 15) The non-transitory storage medium according to claim 15, wherein said indicating a modulation mode of the regular cell-specific reference signal in the current time slot using modulation mode indication information in the determined SSB comprises: based on configuring the additional cell-specific reference signal, indicating a modulation mode of the regular cell-specific reference signal and a modulation mode of the additional cell-specific reference signal in the current time slot using the modulation mode indication information in the determined SSB; or based on configuring the additional cell-specific reference signal, determining the modulation mode of the regular cell-specific reference signal to be a preset modulation mode, and indicating a modulation mode of the additional cell-specific reference signal using modulation mode indication information in an additional cell-specific reference signal indication field in the determined SSB. ### Claim 17 (depends on 9) The non-transitory storage medium according to claim 9, wherein the modulation mode of the regular cell-specific reference signal is selected from a group consisting of π 2 - BPSK and QPSK.