# US 2022/0286252 A1 · 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 2022/0286252 A1 - Document ID: US20220286252A1 - Status: Published application - Kind: A1 - Application number: 17/751,641 - Filed: 2022-05-23 - Published: 2022-09-08 - 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/US20220286252A1 ## 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. ### 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 a data signal on a symbol on which the target reference signal is configured. ### Claim 3 (depends on 1) The method according to claim 1, wherein in a case that the target reference signal is sent by using zero power, the method further comprises: performing power compensation on a 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 a 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 a case that the target reference signal collides 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 a case that the transmitter is 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 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. ### Claim 14 (depends on 13) The transmitter according to claim 13, further comprising: a first processing module, configured to avoid the target reference signal by performing rate matching or puncturing on a data signal on a symbol on which the target reference signal is configured. ### Claim 15 (depends on 13) The transmitter according to claim 13, further comprising: a second processing module, configured to: in a case that the target reference signal is sent by using zero power, perform power compensation on a symbol on which the target reference signal is configured. ### Claim 16 (depends on 13) The transmitter according to claim 13, 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 = 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 17 (depends on 13) The transmitter according to claim 13, 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 a case that the transmitter is 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 18 (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 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. ### 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 a data signal on a symbol on which the target reference signal is configured.