# US 12,224,955 B2 · Reference signal sending method and transmitter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,955 B2 - Document ID: US12224955B2 - Status: Granted - Kind: B2 - Application number: 17/751,641 - Filed: 2022-05-23 - Published: 2022-09-08 - Granted: 2025-02-11 - Earliest claimed: 2019-12-05 - Assignees: Vivo Mobile Communication Co., Ltd. - Applicants: Vivo Mobile Communication Co., Ltd. - Inventors: Hao Liu; Peng Sun; Yang Song; Rakesh Tamrakar; Kaili Zheng - Web page: https://patentgrep.com/patent/US12224955B2 ## 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 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04B 1/04: Circuits - H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 27/261: {Details of reference signals} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/0238: {where the received signal is an unwanted signal, e.g. interference or idle signal} - H04L 1/0068: {by puncturing} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A reference signal sending method and a transmitter are provided. The method includes: determining a time-frequency resource pattern of a target reference signal used for interference measurement, where the time-frequency resource pattern is used to indicate a time domain location and a frequency domain location of the target reference signal; and sending the target reference signal based on the time-frequency resource pattern. ## Claims ### Claim 1 A method for reference signal sending, performed by a transmitter, comprising: determining a time-frequency resource pattern of a target reference signal used for interference measurement, wherein the time-frequency resource pattern is used to indicate a time domain location and a frequency domain location of the target reference signal; and sending the target reference signal by using zero power or non-zero power based on the time-frequency resource pattern, wherein the target reference signal is located on a symbol occupied by a data signal. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: avoiding the target reference signal by performing rate matching or puncturing on the data signal on the symbol on which the target reference signal is configured. ### Claim 3 (depends on 1) The method according to claim 1, wherein in response to the target reference signal being sent by using zero power, the method further comprises: performing power compensation on the symbol on which the target reference signal is configured. ### Claim 4 (depends on 3) The method according to claim 3, wherein the performing power compensation on the symbol on which the target reference signal is configured comprises: performing, by using a compensation factor β, power compensation on the symbol on which the target reference signal is configured, wherein the compensation factor is β = sum_RE sum_RE - sum_IMRS ; and sum_RE represents a total quantity of resource elements (REs) in a resource allocated to the symbol, and sum_IMRS represents a quantity of REs occupied by the target reference signal on the symbol. ### Claim 5 (depends on 1) The sending method according to claim 1, wherein the determining a time-frequency resource pattern of a target reference signal used for interference measurement comprises: determining the time-frequency resource pattern of the target reference signal based on reference information, wherein the reference information comprises at least one of the following: a modulation and coding scheme (MCS) of current service channel transmission; a precoding frequency domain granularity of current service channel transmission; a type of a demodulation reference signal (DMRS), wherein the DMRS and data are frequency division multiple access; a symbol length occupied by the DMRS; a quantity of symbols occupied by the DMRS; a symbol location occupied by the DMRS; a quantity of symbols occupied by the data; a quantity of symbols comprised in a current service channel; a location of a symbol comprised in the current service channel; an identifier of a cell in which a terminal is located; a terminal identifier; or a control resource set index. ### Claim 6 (depends on 5) The method according to claim 5, wherein before the determining a time-frequency resource pattern of a target reference signal used for interference measurement, the method further comprises: receiving first indication information, wherein the first indication information is used to indicate whether the terminal activates the time-frequency resource pattern of the target reference signal. ### Claim 7 (depends on 1) The method according to claim 1, wherein the determining a time-frequency resource pattern of a target reference signal used for interference measurement comprises: receiving second indication information, wherein the second indication information is used to indicate at least one time-frequency resource pattern of the target reference signal; and receiving third indication information and determining the time-frequency resource pattern of the target reference signal based on the third indication information, wherein the third indication information is used to indicate one time-frequency resource pattern in the at least one time-frequency resource pattern. ### Claim 8 (depends on 7) The method according to claim 7, further comprising: carrying the second indication information by using radio resource control (RRC) signaling; or carrying the third indication information by using a media access control control element (MAC CE) or downlink control information. ### Claim 9 (depends on 7) The method according to claim 7, further comprising: using a bitmap to indicate a time domain location of the time-frequency resource pattern; or using a pre-configured time domain start location and time domain density to indicate a time domain location of the time-frequency resource pattern. ### Claim 10 (depends on 7) The method according to claim 7, further comprising: using a bitmap to indicate a frequency domain location of the time-frequency resource pattern; or using a pre-configured time domain start location and time domain density to indicate a frequency domain location of the time-frequency resource pattern. ### Claim 11 (depends on 1) The method according to claim 1, further comprising: in response to the target reference signal colliding with a pre-configured demodulation reference signal (DMRS) on a target symbol, sending the DMRS on the target symbol and ignoring the target reference signal. ### Claim 12 (depends on 1) The method according to claim 1, wherein when the transmitter receives two or more service channels in one slot, respective time-frequency resource patterns are independently configured for different service channels; or in response to the transmitter being a terminal, when the terminal is in a scenario of multiple sending and receiving nodes, respective time-frequency resource patterns are independently configured for communication links between different sending and receiving nodes and the terminal. ### Claim 13 (depends on 1) A communication device, comprising: a memory storing a computer program; and a processor coupled to the memory and configured to execute the computer program to perform a method according to claim 1. ### Claim 14 A transmitter, comprising: a pattern determining module, configured to determine a time-frequency resource pattern of a target reference signal used for interference measurement, wherein the time-frequency resource pattern is used to indicate a time domain location and a frequency domain location of the target reference signal; and a sending module, configured to send the target reference signal by using zero power or non-zero power based on the time-frequency resource pattern, wherein the target reference signal is located on a symbol occupied by a data signal. ### Claim 15 (depends on 14) The transmitter according to claim 14, further comprising: a first processing module, configured to avoid the target reference signal by performing rate matching or puncturing on the data signal on the symbol on which the target reference signal is configured. ### Claim 16 (depends on 14) The transmitter according to claim 14, further comprising: a second processing module, configured to: in response to the target reference signal being sent by using zero power, perform power compensation on the symbol on which the target reference signal is configured. ### Claim 17 (depends on 14) The transmitter according to claim 14, further comprising: a processing sub-module, configured to perform, by using a compensation factor β, power compensation on the symbol on which the target reference signal is configured, wherein the compensation factor is β=√{square root over (sum_RE/sum_RE−sum_IMRS)}; and sum_RE represents a total quantity of resource elements (REs) in a resource allocated to the symbol, and sum_IMRS represents a quantity of REs occupied by the target reference signal on the symbol. ### Claim 18 (depends on 14) The transmitter according to claim 14, wherein when the transmitter receives two or more service channels in one slot, respective time-frequency resource patterns are independently configured for different service channels; or in response to the transmitter being a terminal, when the terminal is in a scenario of multiple sending and receiving nodes, respective time-frequency resource patterns are independently configured for communication links between different sending and receiving nodes and the terminal. ### Claim 19 A non-transitory computer-readable storage medium, storing a computer program, when the computer program is executed by a processor, performs a method for reference signal sending, the method comprising: determining a time-frequency resource pattern of a target reference signal used for interference measurement, wherein the time-frequency resource pattern is used to indicate a time domain location and a frequency domain location of the target reference signal; and sending the target reference signal by using zero power or non-zero power based on the time-frequency resource pattern, wherein the target reference signal is located on a symbol occupied by a data signal. ### Claim 20 (depends on 19) The non-transitory computer-readable storage medium according to claim 19, the method further comprising: avoiding the target reference signal by performing rate matching or puncturing on the data signal on the symbol on which the target reference signal is configured.