# US 12,010,059 B2 · Methods and apparatuses for reference signal configuration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,010,059 B2 - Document ID: US12010059B2 - Status: Granted - Kind: B2 - Application number: 18/102,476 - Filed: 2023-01-27 - Published: 2023-06-01 - Granted: 2024-06-11 - Earliest claimed: 2018-04-02 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Yukai Gao; Gang Wang - Web page: https://patentgrep.com/patent/US12010059B2 ## 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)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - 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 Embodiments of the present disclosure relate to methods and apparatuses for Reference Signal (RS) transmission. In example embodiments, a method implemented in a network device is provided. According to the method, the network device determines at least one set of CSI-RS resources for transmitting Tracking Reference Signal (TRS) to a terminal device. The network device further determines a first offset between a first slot to transmit a first signal for enabling transmission of the TRS and a second slot to transmit the TRS in the at least one set of CSI-RS resources. The first offset is different from a second offset between a third slot to transmit a second signal for enabling transmission of CSI-RS and a fourth slot to transmit the CSI-RS. The network device transmits a configuration indicating the at least one set of CSI-RS resources and the first offset to the terminal device. ## Claims ### Claim 1 A method performed by a base station, the method comprising: transmitting, to a terminal device, first information indicating a first resource set for a Channel State Information Reference Signal (CSI-RS) for tracking, the first information comprising: a parameter trs-Info set to a value representing true; and a first parameter indicating a first time offset between a first slot containing a first signal that triggers a transmission of the CSI-RS for tracking and a second slot in which the CSI-RS for tracking is transmitted, wherein the first time offset is configured to satisfy a threshold condition required by the terminal device; and transmitting the CSI-RS for tracking to the terminal device in the second slot. ### Claim 2 (depends on 1) The method of claim 1, wherein: the first resource set is associated with a set of periodic CSI-RS resources configured with four periodic CSI-RS resources with two consecutive slots with two periodic CSI-RS resources in each slot, wherein the two consecutive slots are in an order of a third slot and a fourth slot in time domain, and the first time offset is for the third slot. ### Claim 3 (depends on 1) The method of claim 1, wherein the CSI-RS for tracking is aperiodic. ### Claim 4 (depends on 1) The method of claim 1, wherein the first signal is transmitted in a Downlink Control Information (DCI) format. ### Claim 5 (depends on 1) The method of claim 1, further comprising: determining the first time offset based on a first subcarrier spacing (SCS) associated with the CSI-RS for tracking. ### Claim 6 (depends on 5) The method of claim 5, wherein the first signal is associated with a second SCS that is different from the first SCS. ### Claim 7 A method performed by a terminal device, the method comprising: receiving, from a base station, first information indicating a first resource set for a Channel State Information Reference Signal (CSI-RS) for tracking, the first information comprising: a parameter trs-Info set to a value representing true; and a first parameter indicating a first time offset between a first slot containing a first signal that triggers the CSI-RS for tracking and a second slot in which the CSI-RS for tracking is received, wherein the first time offset is configured to satisfy a threshold condition required by the terminal device; and receiving the CSI-RS for tracking from the base station in the second slot. ### Claim 8 (depends on 7) The method of claim 7, wherein: the first resource set is associated with a set of periodic CSI-RS resources configured with four periodic CSI-RS resources with two consecutive slots with two periodic CSI-RS resources in each slot, wherein the two consecutive slots are in an order of a third slot and a fourth slot in time domain, and the first time offset is for the third slot. ### Claim 9 (depends on 7) The method of claim 7, wherein the CSI-RS for tracking is aperiodic. ### Claim 10 (depends on 7) The method of claim 7, wherein the first signal is received in a Downlink Control Information (DCI) format. ### Claim 11 (depends on 7) The method of claim 7, wherein the first time offset is based on a first subcarrier spacing (SCS) associated with the CSI-RS for tracking. ### Claim 12 (depends on 11) The method of claim 11, wherein the first signal is associated with a second SCS that is different from the first SCS. ### Claim 13 A base station comprising: a transceiver; and a processor configured to control the transceiver to: transmit, to a terminal device, first information indicating a first resource set for a Channel State Information Reference Signal (CSI-RS) for tracking, the first information comprising: a parameter trs-Info set to a value representing true; and a first parameter indicating a first time offset between a first slot containing a first signal that triggers a transmission of the CSI-RS for tracking and a second slot in which the CSI-RS for tracking is transmitted, wherein the first time offset is configured to satisfy a threshold condition required by the terminal device; and transmit the CSI-RS for tracking to the terminal device in the second slot. ### Claim 14 (depends on 13) The base station of claim 13, wherein: the first resource set is associated with a set of periodic CSI-RS resources configured with four periodic CSI-RS resources with two consecutive slots with two periodic CSI-RS resources in each slot, wherein the two consecutive slots are in an order of a third slot and a fourth slot in time domain, and the first time offset is for the third slot. ### Claim 15 (depends on 13) The base station of claim 13, wherein the CSI-RS for tracking is aperiodic. ### Claim 16 (depends on 13) The base station of claim 13, wherein the first signal is transmitted in a Downlink Control Information (DCI) format. ### Claim 17 (depends on 13) The method of claim 13, further comprising a controller configured to determine the first time offset is based on a first subcarrier spacing (SCS) associated with the CSI-RS for tracking. ### Claim 18 (depends on 17) The method of claim 17, wherein the first signal is associated with a second SCS that is different from the first SCS.