Reference signal transmitting method and apparatus, reference signal receiving method and apparatus, and terminal and network-side device

Abstract

The present application belongs to the technical field of wireless communications. Disclosed are a reference signal transmitting method and apparatus, a reference signal receiving method and apparatus, and a terminal and a network-side device. The reference signal transmitting method in an embodiment of the present application comprises: a network-side device transmitting DCI to a terminal, wherein the DCI is used for indicating the configuration of a target downlink reference signal or triggering the terminal to receive the target downlink reference signal, and the DCI is further used for indicating at least one of the following actions: the DCI instructing the terminal to execute channel state information (CSI) measurement associated with the target downlink reference signal but not to execute CSI feedback, and the DCI instructing the terminal not to execute CSI measurement associated with the target downlink reference signal and not to execute CSI feedback; and on the basis of the transmitted DCI, the network-side device transmitting the target downlink reference signal to the terminal.

Description

Reference signal transmission and reception methods, devices, terminals and network-side equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411742188.7, filed on November 29, 2024, entitled “Reference Signal Transmission and Reception Method, Apparatus, Terminal and Network Side Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of wireless communication technology, specifically relating to a reference signal transmission and reception method, apparatus, terminal, and network-side equipment. Background Technology

[0004] In related technologies, network-side devices trigger the reception of Channel State Information (CSI) Reference Signal (RS) of terminals and the acquisition and feedback of CSI based on the CSI-RS through a Downlink Control Information (DCI).

[0005] Because the entire process of CSI acquisition and feedback takes a considerable amount of time, in the absence of out-of-order scheduling support from the moment the DCI triggers CSI-RS reception and CSI feedback to the moment the terminal feeds back the CSI, the network-side device cannot schedule the terminal to transmit on other uplink channels via DCI. For example, in Figure 1a, DCI 0 is used to trigger a CSI report configuration, i.e., to trigger the reception of the CSI-RS associated with that CSI report configuration and the feedback of the CSI report based on that configuration. This CSI report is transmitted on the Physical Uplink Shared Channel (PUSCH) 0. Therefore, the network-side device cannot schedule the transmission of PUSCH 1 via DCI 1. Thus, the technical solutions in related technologies may result in resource waste or low resource utilization. Summary of the Invention

[0006] This application provides a reference signal transmission and reception method, apparatus, terminal, and network-side device, which can solve the above-mentioned problems of resource waste or low resource utilization.

[0007] In a first aspect, a reference signal transmission method is provided, comprising: a network-side device transmitting a Direct Current Information (DCI) to a terminal, wherein the DCI is used to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is further used to instruct at least one of the following actions: the DCI instructs the terminal to perform channel state information (CSI) measurement based on the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurement based on the target downlink reference signal and not to perform CSI feedback; the network-side device transmits the target downlink reference signal to the terminal based on the transmitted DCI.

[0008] In a second aspect, a reference signal receiving method is provided, comprising: a terminal receiving a DCI sent by a network-side device, wherein the DCI is used to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is further used to instruct at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback; and the terminal receives the target downlink reference signal sent by the network-side device based on the DCI.

[0009] Thirdly, a reference signal transmitting apparatus is provided, comprising: a transmitting module, configured to transmit a Direct Current Information (DCI) to a terminal, wherein the DCI is configured to instruct the configuration of a target downlink reference signal or trigger the terminal to receive the target downlink reference signal, and the DCI is further configured to instruct at least one of the following actions: the DCI instructs the terminal to perform channel state information (CSI) measurement based on the target downlink reference signal but without performing CSI feedback; the DCI instructs the terminal not to perform CSI measurement based on the target downlink reference signal and not to perform CSI feedback; the transmitting module is further configured to transmit the target downlink reference signal to the terminal based on the transmitted DCI.

[0010] Fourthly, a reference signal receiving apparatus is provided, comprising: a receiving module, configured to receive a Direct Indicator (DCI) sent by a network-side device, wherein the DCI is configured to instruct the configuration of a target downlink reference signal or trigger the terminal to receive the target downlink reference signal, and the DCI is further configured to instruct at least one of the following actions: the DCI instructs the terminal to perform a CSI measurement associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform a CSI measurement associated with the target downlink reference signal and not to perform CSI feedback; the receiving module is further configured to receive the target downlink reference signal sent by the network-side device based on the DCI.

[0011] Fifthly, a reference signal transmitting or receiving apparatus is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0012] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0013] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to perform the steps of the method described in the second aspect, and the communication interface is configured to be coupled to the processor.

[0014] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0015] A ninth aspect provides a network-side device including a processor and a communication interface, wherein the processor is configured to perform the steps of the method described in the first aspect, and the communication interface is configured to be coupled to the processor.

[0016] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0017] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the second aspect, and the network-side device can be used to perform the steps of the method as described in the first aspect.

[0018] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0019] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0020] In this embodiment, the DCI sent by the network-side device to the terminal is used to instruct the configuration of the target downlink reference signal or to trigger the terminal to receive the target downlink reference signal. The DCI instructs the terminal to perform CSI measurement based on the target downlink reference signal but not to perform CSI feedback, or the DCI instructs the terminal not to perform CSI measurement based on the target downlink reference signal and not to perform CSI feedback. This allows the network-side device to flexibly schedule the uplink transmission of the terminal and improves the utilization of resources. Attached Figure Description

[0021] Figure 1a shows a schematic diagram of scheduling via DCI;

[0022] Figure 1b shows a block diagram of a wireless communication system that can be applied to an embodiment of this application;

[0023] Figure 2 shows a schematic flowchart of a reference signal transmission method provided in an embodiment of this application;

[0024] Figure 3 shows a flowchart of a reference signal receiving method provided in an embodiment of this application;

[0025] Figure 4 shows a schematic diagram of a reference signal transmitting device provided in an embodiment of this application;

[0026] Figure 5 shows a schematic diagram of a reference signal receiving device provided in an embodiment of this application;

[0027] Figure 6 shows a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0028] Figure 7 shows a schematic diagram of the hardware structure of a terminal provided in an embodiment of this application;

[0029] Figure 8 shows a schematic diagram of the hardware structure of a network-side device provided in an embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0033] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used in the systems and radio technologies mentioned above, as well as in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems.

[0034] Figure 1b shows a block diagram of a wireless communication system applicable to an embodiment of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home devices (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (WiFi) nodes, etc.The term "base station" can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to any specific technical terminology. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0035] NR's CSI reports include:

[0036] 1) Beam reporting, such as reporting CSI-RS Resource Indicator (CRI) and Layer 1 Reference Signal Received Power (L1-RSRP), CRI and Layer 1 Signal-to-Interference-plus-Noise Ratio (L1-SINR), etc.

[0037] 2) Codebook-based CSI reports, including CRI, Rank Indicator (RI), Precoding Matrix Indicator (PMI), Layer Indicator (LI), and Channel Quality Indicator (CQI). Among these, PMI has several types, which can be categorized into Type I and Type II codebooks.

[0038] 3) Non-codebook-based CSI reports, which do not include PMI (Precoding Matrix Indicator).

[0039] CSI reports can typically be configured as follows:

[0040] 1) Periodic CSI Report (P-CSI): Transmitted only on the Physical Uplink Control Channel (PUCCH);

[0041] 2) Semi-Persistent CSI Reporting (SP-CSI): Transmitted on the PUCCH or Physical Uplink Shared Channel (PUSCH). SP-CSI reporting based on the PUSCH is activated and deactivated by the CSI Request field in the DCI signaling. Radio Resource Control (RRC) configures a maximum of 64 trigger states, each corresponding to a CSI report configuration signaling (CSI-ReportConfig). Except for group-based beamforming, each CSI-ReportConfig associated with a CSI-RS resource setting (CSI-ResourceConfig) for channel measurements contains only one CSI-RS resource set.

[0042] 3) Aperiodic CSI Reporting (AP-CSI): Transmitted only on the PUSCH. PUSCH-based A-CSI reporting is activated and deactivated by the CSI Request field in the DCI signaling. The RRC configures multiple trigger states, each corresponding to one or more CSI report configuration signaling (CSI-ReportConfig). The CSI Request field in the DCI triggers one trigger state. The maximum configuration of the CSI Request field in DCI format 0_1 ​​is 6 bits, thus supporting a maximum of 64 CSI trigger states. When the RRC configures more than 64 CSI trigger states, 64 of these trigger states are mapped to the CSI Request field via MAC CE signaling. Each CSI-ReportConfig can be associated with 1 to 3 CSI-ResourceConfigs. If a CSI-ResourceConfig used for channel measurement contains multiple CSI-RS resource sets, the associated trigger state indicates a CSI-RS resource set and the quasi-co-address information of each CSI-RS resource in the resource set.

[0043] In an NR system, one CSI report configuration signaling (CSI-ReportConfig) can typically be associated with 1 to 3 CSI-ResourceConfigs (CSI resource configurations). A CSI-ResourceConfig typically has the following characteristics:

[0044] 1) Associate S ≥ 1 CSI-RS resource sets;

[0045] 2) A resource set is associated with Ks≥1 RS resources, such as channel measurement CSI-RS, CSI interference measurement (CSI-IM) resources, and interference measurement CSI-RS;

[0046] 3) A CSI-RS resource includes at least one of the following pieces of information:

[0047] a) Resource Identifier (ID);

[0048] b) Period and time slot offset;

[0049] c) Number of ports;

[0050] d) Time-frequency location;

[0051] e) Code Division Multiplexing (CDM) type;

[0052] f) Density;

[0053] g) Power parameters;

[0054] h) Scrambling code ID;

[0055] i) Bandwidth Part (BWP) ID and other information.

[0056] 4) A CSI-IM resource should include at least the time, frequency and location information of the CSI-IM.

[0057] When using aperiodic CSI-RS and aperiodic reporting, the CSI-RS time-domain position offset is set by the RRC parameter aperiodicTriggeringOffset, aperiodicTriggeringOffset-r16, or aperiodicTriggeringOffset-r17. These RRC parameters are configured in CSI-ReportConfig.

[0058] The UE does not expect to receive aperiodic CSI-RS before the OFDM symbol associated with the DCI that triggers CSI-RS.

[0059] When the minimum scheduling offset limit is applied, the UE does not expect the CSI-RS trigger offset indicated by the DCI to be less than the currently applicable minimum scheduling offset limit K0min.

[0060] In related technologies, it is not possible to independently trigger aperiodic CSI-RS and aperiodic CSI feedback; a single DCI triggers both CSI-RS reception and CSI feedback. Between the moment the DCI triggers CSI-RS reception and CSI feedback and the moment the terminal provides CSI feedback, the network-side equipment cannot schedule the terminal to perform transmissions on other uplink channels via the DCI. Therefore, without utilizing network-side equipment scheduling, resource waste or low resource utilization may occur. To address this problem, embodiments of this application provide a reference signal transmission and reception method, apparatus, terminal, and network-side equipment.

[0061] The technical solutions provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0062] Figure 2 shows a schematic flowchart of a reference signal transmission method according to an embodiment of this application. This method 200 can be executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. As shown in Figure 2, the method may include the following steps.

[0063] S210, the network-side device sends DCI to the terminal.

[0064] In this embodiment of the application, the DCI is used to indicate the configuration of the target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is also used to indicate at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback, the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback.

[0065] In this embodiment, CSI measurement can be understood as CSI acquisition, meaning the terminal acquires CSI based on the received target downlink reference signal. It can acquire all CSI content or only a portion of it. For acquiring partial CSI content, one method is that network signaling indicates the CSI content to be acquired, and another method is that the protocol specifies the CSI content to be acquired, for example, acquiring broadband CSI content.

[0066] In this embodiment, CSI feedback can be understood as CSI reporting, meaning the terminal feeds back the acquired CSI to the network-side device via the uplink channel. Optionally, the uplink channel is indicated by network signaling or determined by the terminal based on rules agreed upon in the protocol. Optionally, the uplink channel is associated with multiple uplink channel resources.

[0067] In this embodiment, regarding the DCI instructing the terminal to perform CSI measurement but not CSI feedback, or the DCI instructing the terminal not to perform CSI measurement and not to perform CSI feedback, one approach is as follows: the DCI (i.e., the DCI used to trigger the terminal to receive the target downlink reference signal) cannot be used to trigger the terminal to perform CSI feedback; the network-side device triggers the terminal to perform CSI feedback through other DCIs. However, the DCI can be used to indicate whether the terminal performs CSI measurement. Optionally, when indicating CSI measurement, the DCI can further indicate the CSI content to be measured, which can be all CSI content or part of the CSI content. Another approach is as follows: the DCI (i.e., the DCI used to trigger the terminal to receive the downlink reference signal) also triggers the terminal to perform CSI measurement by default (i.e., it can be understood that the DCI cannot be used to instruct the terminal not to perform CSI measurement), but cannot be used to instruct the terminal to perform CSI feedback; the network-side device triggers the terminal to perform CSI feedback through other DCIs. Another approach is that the DCI (i.e., the DCI used to trigger the terminal to receive the target downlink reference signal) cannot be used to instruct the terminal to perform CSI measurement or CSI feedback. The network-side device triggers the terminal to perform CSI measurement or CSI feedback through other DCIs. Optionally, the DCIs instructing CSI measurement and CSI feedback can be the same DCI or different DCIs, wherein the different DCIs can have different DCI formats, different DCI time-frequency resources, or different DCI signaling. Another approach is that the DCI (i.e., the DCI used to trigger the terminal to receive the target downlink reference signal) can also be used to instruct the terminal whether to perform CSI feedback. When instructing CSI feedback, the network device does not need to trigger the terminal to perform CSI feedback through another DCI. When instructing that CSI feedback is not required, the DCI can be used to instruct the terminal whether to perform CSI measurement. Optionally, if the network-side device instructs the terminal to perform CSI feedback, the network-side device should instruct the terminal to perform CSI measurement, or the terminal device should perform CSI measurement by default. This can be understood as follows: at this time, the network-side device does not configure signaling to indicate whether the terminal should perform CSI measurement, or the terminal does not refer to the signaling to indicate whether the terminal should perform CSI measurement.

[0068] In this embodiment, the DCI can be either an uplink DCI or a downlink DCI. The target downlink reference signal can be a common downlink reference signal such as CSI-RS, Tracking Reference Signal (TRS), or CSI-IM resource, or any downlink reference signal requiring channel estimation or received power calculation.

[0069] S212, the network-side device sends the target downlink reference signal to the terminal based on the transmitted DCI.

[0070] The technical solution provided in this application embodiment allows the network-side device to send a DCI to the terminal to instruct the configuration of the target downlink reference signal or trigger the terminal to receive the target downlink reference signal. The DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback, or the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback. This enables the network-side device to flexibly schedule the uplink transmission of the terminal based on the uplink resource utilization of the system, thereby improving resource utilization.

[0071] In some embodiments, the DCI (i.e., the DCI used to trigger the terminal to receive the target downlink reference signal) can also be used to indicate the configuration of at least one Physical downlink shared channel (PDSCH) or to trigger the terminal to perform reception of at least one PDSCH. That is, in these embodiments, in addition to being used to trigger the terminal to receive the target downlink reference signal or to indicate the configuration of the target downlink reference signal, the DCI is also used to trigger the terminal to perform reception of at least one PDSCH.

[0072] In the above embodiments, the method may further include: when the network-side device transmits the at least one PDSCH, it performs rate matching on the target downlink reference signal. That is, for any PDSCH, when the network-side device transmits it, it needs to perform rate matching on the target downlink reference signal (e.g., CSI-RS or CSI-IM resource) associated with it. Similarly, when the terminal receives the at least one PDSCH, it needs to perform rate matching based on the target downlink reference signal triggered by the DCI. This can be understood as follows: for any PDSCH, when the terminal receives and performs rate matching, it needs to consider the target downlink reference signal (e.g., CSI-RS or CSI-IM resource) associated with it. For example, when the time-frequency resource associated with any PDSCH resource at least partially overlaps with the time-frequency resource associated with the target downlink reference signal, the network-side device needs to perform rate matching based on the target downlink reference signal when transmitting the PDSCH. Correspondingly, when the terminal receives the PDSCH, it needs to perform rate matching based on the target downlink reference signal.

[0073] Optionally, in these embodiments, the network-side device independently indicates: 1) the timing (time, time slot, or symbol) of the transmission or reception of the target downlink reference signal; 2) the timing (time, time slot, or symbol) of the transmission or reception of at least one PDSCH indicated by the DCI.

[0074] Optionally, in the above embodiments, the timing (time, time slot, or symbol) of the transmission or reception of the target downlink reference signal indicated by the network-side device may be before or after the transmission or reception of at least one PDSCH indicated by the DCI, or may overlap with the at least one PDSCH in the time domain.

[0075] These embodiments enable network-side devices to flexibly configure the timing of PDSCH and reference signal transmission, thereby improving the flexibility of network device scheduling.

[0076] In some embodiments, the DCI is also used to: indicate at least one of the following configurations: at least one Physical Uplink Shared Channel (PUSCH) and at least one Physical Uplink Control Channel (PUCCH); or to trigger the terminal to perform at least one of the following transmissions: at least one PUSCH and at least one PUCCH. That is, in addition to triggering the terminal to receive downlink reference signals or indicating downlink reference signal configurations, the DCI is also used to trigger the terminal to perform at least one PUSCH or at least one PUCCH transmission, or to indicate the configuration of at least one PUSCH or at least one PUCCH. Wherein, for the network-side device to trigger the transmission of any one PUSCH, it can be understood that the terminal performs a transmission or transmission on the PUSCH resource indicated by the network device.

[0077] Through these embodiments, the DCI is also used to indicate the configuration of at least one PUSCH or PUCCH, or to trigger the terminal to send at least one PUSCH or PUCCH, thereby saving DCI signaling overhead.

[0078] In the above embodiments, when the DCI triggers the transmission of at least one PUSCH or at least one PUCCH, the at least one PUSCH or at least one PUCCH includes at least one of the following features:

[0079] Excluding Uplink Control Information (UCI);

[0080] Excluding CSI, but including UCI;

[0081] Excluding the CSI associated with the target downlink reference signal;

[0082] This can be understood as follows: at least one PUSCH triggered by the DCI does not carry uplink control information, but only uplink data. Alternatively, it can be understood as follows: at least one PUCCH or PUSCH triggered by the DCI does not carry any CSI, but may carry UCI. It can also be understood as follows: at least one PUSCH or at least one PUCCH triggered by the DCI does not carry CSI-related content associated with the target downlink reference signal indicated by the DCI, but may carry CSI content of other downlink reference signals.

[0083] Alternatively, when the DCI also triggers the transmission of at least one PUSCH, the network-side device indicates through the DCI that the at least one PUSCH includes a UCI or a CSI. This can be understood as: the network-side device can use the DCI to indicate whether the at least one PUSCH includes a UCI or a CSI. Alternatively, it can be understood as: the network-side device can use the DCI to indicate whether the CSI determined by the terminal based on the target downlink reference signal is carried in the at least one PUSCH indicated by the DCI.

[0084] Alternatively, the DCI may also indicate that the PUSCH includes the UCI, but the UCI does not include the CSI.

[0085] Alternatively, the DCI may also indicate that the PUSCH does not include UCI, or the DCI may also indicate that the PUSCH does not include both UCI and CSI. Generally, if the PUSCH does not include UCI, it naturally does not include CSI, because CSI is usually carried within UCI, but this does not preclude the possibility that CSI may not be carried within UCI in the future.

[0086] Optionally, the CSI mentioned above can be CSI obtained based on the target downlink reference signal, or it can be CSI obtained based on other downlink reference signals.

[0087] Alternatively, the DCI may also indicate that the PUSCH does not include the CSI associated with the target downlink reference signal; it can be assumed that the CSI associated with the target downlink reference signal is not carried in the UCI.

[0088] Optionally, the above does not include the CSI associated with the target downlink reference signal. In this case, PUSCH may include CSI obtained based on other downlink reference signals besides the target downlink reference signal.

[0089] In some embodiments, the DCI includes an aperiodic CSI reference signal indication field (AP CSI-RS indication field), which is used to indicate the configuration information of the target downlink reference signal. Optionally, the DCI is a downlink DCI. Optionally, when the DCI is an uplink DCI, the network-side device indicates the configuration information of the target downlink reference signal to the terminal through a CSI request field.

[0090] Optionally, the aperiodic CSI reference signal indication field is used to indicate the configuration information of the N1 reference signal set or N1 reference signals, where N1 is an integer greater than or equal to 1.

[0091] For example, the bit sequence associated with the AP CSI-RS indication field indicates an element in a pre-configured list of higher-layer signaling, said element being associated with a set of N1 reference signals or N1 reference signals. As another example, the bit sequence associated with the AP CSI-RS indication field can be divided into S sub-sequences, at least some of which are associated with a set of reference signals or a single reference signal pre-configured by higher-layer signaling.

[0092] In some embodiments, the DCI includes a CSI request field, which indicates at least one of the following: configuration information of the target downlink reference signal, whether the terminal feeds back the CSI, whether the terminal acquires the CSI, whether the terminal acquires part or all of the CSI, and the configuration of the CSI acquired by the terminal.

[0093] Optionally, the terminal determines to perform at least one of the following actions based on the CSI request field: the terminal determines the configuration information of the target downlink reference signal based on the indication of the CSI request field; the terminal determines to feedback the CSI associated with the CSI request field; the terminal determines not to feedback the CSI associated with the CSI request field; the terminal determines to acquire the CSI associated with the CSI request field; the terminal determines not to acquire the CSI associated with the CSI request field; the terminal determines to acquire part of the content of the CSI associated with the CSI request field; the terminal determines to acquire all the content of the CSI associated with the CSI request field; and the terminal determines to configure the content associated with the acquired CSI.

[0094] Optionally, the CSI request field satisfies at least one of the following:

[0095] 1) The bit sequence associated with the CSI request field includes at least one bit, which is used to indicate whether the terminal provides feedback on the CSI; in this optional embodiment, the bit sequence associated with the CSI request field contains one bit to indicate whether the DCI is associated with CSI feedback.

[0096] 2) The CSI request field is used to indicate a target trigger state, which is a trigger state in a trigger state list configured by higher-layer signaling. The trigger state list includes at least one first state or at least one second state. The at least one first state is associated with configuration information of at least one downlink reference signal, and the at least one second state is associated with at least one CSI report configuration. When the target trigger state is the first state, the DCI instructs the terminal not to report the CSI; when the target trigger state is the second state, the DCI instructs the terminal to report the CSI. In this optional implementation, the CSI request field is used to indicate a target trigger state in a trigger state list configured by higher-layer signaling. The trigger state list includes at least one first state, and each first state is associated with configuration information of at least one downlink reference signal. Alternatively, the trigger state list includes at least one second state, and each second state is associated with at least one CSI report configuration.

[0097] 3) The CSI request field is used to indicate a target CSI report configuration, which is at least one of a plurality of CSI report configurations configured by higher-layer signaling. If the CSI report content associated with the target CSI report configuration is empty, the DCI instructs the terminal not to report the CSI; if the CSI report content associated with the target CSI report configuration is not empty, the DCI instructs the terminal to report the CSI. In this optional implementation, the CSI request field is used to indicate at least one of a plurality of CSI report configurations configured by higher-layer signaling. If the CSI report content associated with the target CSI report configuration is none, the DCI instructs the terminal not to report the CSI; otherwise, the DCI instructs the terminal to report the CSI.

[0098] 4) The CSI request field is used to indicate a target trigger state, which is a trigger state in the trigger state list configured by higher-layer signaling. The trigger state list includes at least one fourth state, which indicates that the terminal does not respond to the CSI. When the target trigger state is the fourth state, the DCI indicates that the terminal does not respond to the CSI. In this optional implementation, the trigger state list includes at least one fourth state, and each fourth state includes a field for indicating that the terminal does not respond to the CSI or for indicating that the terminal responds to the CSI. If the DCI indicates that a fourth state includes a field indicating that the terminal does not respond to the CSI, then the DCI indicates that the terminal does not respond to the CSI.

[0099] 5) The CSI request field is used to indicate a target CSI reporting configuration. The target CSI reporting configuration includes at least one first CSI reporting configuration or at least one second CSI reporting configuration from a plurality of higher-layer signaling CSI reporting configurations. The plurality of CSI reporting configurations includes at least one pair of CSI reporting configurations, where each pair includes one first CSI reporting configuration and one second CSI reporting configuration. The pair of CSI reporting configurations is associated with the same CSI reference signal configuration information. When the CSI request field indicates that the target CSI reporting configuration is a first CSI reporting configuration, it means that the DCI instructs the terminal not to report the CSI. When the CSI request field indicates that the target CSI reporting configuration is a second CSI reporting configuration, it means that the DCI instructs the terminal to report the CSI.

[0100] Optionally, the CSI content associated with the first CSI report is empty; or, the first CSI report is associated with a portion of the CSI content and the second CSI report is associated with another portion of the CSI content.

[0101] In this optional implementation, at least one pair of CSI report configurations are associated with the same CSI-RS configuration information, and the CSI report content associated with one of the CSI report configurations may be none.

[0102] 6) The CSI request field is used to indicate a target CSI reporting configuration. The target CSI reporting configuration includes at least one third CSI reporting configuration among multiple CSI reporting configurations configured by higher-layer signaling. This third reporting configuration is associated with a fourth reporting configuration via network signaling. The third reporting configuration includes configuration information for at least one downlink reference signal. In this optional implementation, at least one of the multiple CSI reporting configurations (the third reporting configuration) is associated with another CSI reporting configuration (the fourth reporting configuration). The fourth reporting configuration includes configuration information for at least one uplink channel resource, and the CSI report content is not none. When the CSI request field indicates that the target CSI reporting configuration is the third CSI reporting configuration, it means that the DCI instructs the terminal not to report the CSI. When the CSI request field indicates that the target CSI reporting configuration is the fourth CSI reporting configuration, it means that the DCI instructs the terminal to report the CSI, and the CSI is the CSI associated with the third reporting configuration associated with the fourth reporting configuration.

[0103] Optionally, the configuration information of the downlink reference signal associated with the fourth report configuration is the configuration information of at least one downlink reference signal included in the third report configuration; or, the CSI content associated with the third report configuration is empty; or, the third CSI report configuration is associated with a part of the CSI content and the fourth CSI report configuration is associated with another part of the CSI content.

[0104] In other words, in the above embodiments, the network-side device can use the DCI to indicate whether the CSI determined by the terminal based on the target downlink reference signal is carried in at least one PUSCH indicated by the DCI, which may include at least one of the following indication methods:

[0105] 1) The DCI includes a CSI request field, and one bit in the bit sequence associated with the CSI request field is used to indicate whether the DCI is associated with CSI feedback. This can be understood as the first or last bit of the bit sequence being used to indicate whether the CSI determined by the terminal based on the target downlink reference signal is carried in at least one PUSCH indicated by the DCI;

[0106] 2) The DCI includes a CSI request field, and the bit sequence associated with the CSI request field is associated with a trigger state in a pre-configured list of trigger states for higher-layer signaling. The network-side device can indicate whether the CSI determined by the terminal based on the target downlink reference signal is carried in at least one PUSCH indicated by the DCI by indicating different trigger states.

[0107] For example, the trigger state list includes at least one first state, each first state being associated with configuration information of at least one downlink reference signal. The trigger state list also includes at least one second state, each second state being associated with at least one CSI report configuration (CSI-ReportConfig). If the CSI request field is associated with a first state, it is equivalent to instructing the terminal to determine the CSI based on the downlink reference signal not to be carried in at least one PUSCH indicated by the DCI. If the CSI request field is associated with a second state, it is equivalent to instructing the terminal to determine the CSI based on the target downlink reference signal to be carried in at least one PUSCH indicated by the DCI.

[0108] 3) The DCI includes a CSI request field, and the bit sequence associated with the CSI request field is associated with at least one CSI report configuration. The network-side device can indicate whether the CSI determined by the terminal based on the downlink reference signal is carried in at least one PUSCH indicated by the DCI by indicating different CSI report configurations.

[0109] For example, the CSI request field is used to indicate at least one CSI reporting configuration among multiple CSI reporting configurations configured by higher-layer signaling. Among the multiple CSI reporting configurations, there is at least one pair of CSI reporting configurations associated with the same CSI-RS configuration information, and one CSI reporting configuration is associated with "none" for its CSI report content. For any one of the at least one CSI reporting configurations, if its associated CSI report content is "none," it is equivalent to indicating that the CSI determined by the terminal based on the target downlink reference signal does not need to be carried in at least one PUSCH indicated by the DCI; if it is associated with specific CSI report content, it is equivalent to indicating that the CSI determined by the terminal based on the target downlink reference signal needs to be carried in at least one PUSCH indicated by the DCI.

[0110] For example, the CSI request field is used to indicate at least one CSI reporting configuration among multiple CSI reporting configurations configured by higher-layer signaling. At least one of the multiple CSI reporting configurations (the third reporting configuration) is associated with another CSI reporting configuration (the fourth reporting configuration). The third reporting configuration includes configuration information for at least one downlink reference signal, and its CSI report content is "none". The configuration information of the downlink reference signal associated with the fourth reporting configuration is the configuration information of at least one downlink reference signal included in the third reporting configuration. For any one of the at least one CSI reporting configurations, if its associated CSI report content is "none", it is equivalent to indicating that the CSI determined by the terminal based on the target downlink reference signal does not need to be carried in at least one PUSCH indicated by the DCI. If it is associated with specific CSI report content, it is equivalent to indicating that the CSI determined by the terminal based on the target downlink reference signal needs to be carried in at least one PUSCH indicated by the DCI.

[0111] 4) The DCI includes a CSI request field and an AP CSI-RS indication field. The bit sequence associated with the CSI request field is associated with at least one CSI report configuration. The bit sequence associated with the AP CSI-RS indication field is associated with N1 sets of reference signals or configuration information of the reference signals (e.g., time-domain location configuration, CDM configuration, frequency-domain location configuration, frequency-domain density configuration, port configuration, etc.), where N1 is an integer greater than or equal to 1. The network-side device can indicate whether the CSI determined by the terminal based on the downlink reference signal is carried in at least one PUSCH indicated by the DCI by using different bit sequences indicated by the CSI request field.

[0112] For example, if the bit sequence associated with the CSI request field is all 0s or all 1s, it is equivalent to indicating that the CSI determined by the terminal based on the downlink reference signal does not need to be carried in at least one PUSCH indicated by the DCI. If the bit sequence associated with the CSI request field is not all 0s or all 1s, it is equivalent to indicating that the CSI determined by the terminal based on the downlink reference signal needs to be carried in at least one PUSCH indicated by the DCI.

[0113] For example, the bit sequence associated with the CSI request field may be associated with codepoint '0', codepoint '1', or codepoint '2'. (where N)TS When the length of the bit sequence associated with the CSI request field is specified, it is equivalent to indicating that the CSI determined by the terminal based on the target downlink reference signal does not need to be carried in at least one PUSCH indicated by the DCI. Otherwise, it is equivalent to indicating that the CSI determined by the terminal based on the target downlink reference signal needs to be carried in at least one PUSCH indicated by the DCI.

[0114] Optionally, the network-side device independently indicates the timing (or time, time slot, or symbol) of transmitting or receiving the target downlink reference signal and the timing (or time, time slot, or symbol) of transmitting at least one PUSCH indicated by the DCI. Optionally, if the CSI determined by the network-side device based on the target downlink reference signal through the DCI-indicating terminal is carried in at least one PUSCH indicated by the DCI, then the timing (or time, time slot, or symbol) of transmitting or receiving the target downlink reference signal indicated by the network-side device can be before the transmission of at least one PUSCH indicated by the DCI. If the CSI determined by the network-side device based on the target downlink reference signal through the DCI-indicating terminal does not need to be carried in at least one PUSCH indicated by the DCI, then the timing (or time, time slot, or symbol) of transmitting or receiving the target downlink reference signal indicated by the network-side device can be before or after the transmission of at least one PUSCH indicated by the DCI.

[0115] Through the above embodiments, network-side devices can be supported in instructing terminals through the same DCI whether to feed back the CSI report or UCI determined by the terminal on at least one PUSCH channel associated with the current DCI. This can improve the scheduling flexibility of network-side devices, allowing them to flexibly adjust the timing of CSI-RS measurement, CSI acquisition, and CSI feedback based on the terminal's capabilities or system load.

[0116] In some embodiments, after the network-side device sends downlink control information (DCI) to the terminal, the method may further include: the network-side device receiving confirmation information from the terminal, wherein the confirmation information is used to indicate at least one of the following:

[0117] 1) The terminal correctly receives the DCI;

[0118] 2) The terminal did not receive the DCI correctly;

[0119] 3) The terminal correctly receives the target downlink reference signal triggered by the DCI;

[0120] 4) The terminal failed to correctly receive the target downlink reference signal triggered by the DCI;

[0121] 5) The terminal correctly receives the PDSCH triggered by the DCI;

[0122] 6) The terminal did not correctly receive the PDSCH triggered by the DCI.

[0123] Optionally, the confirmation information may indicate one of the above, for example, the confirmation information may only be used to indicate that the terminal correctly receives the downlink reference signal triggered by the DCI, or that the terminal does not correctly receive the downlink reference signal triggered by the DCI.

[0124] Optionally, the confirmation information may indicate multiple aspects of the above. For example, the confirmation information may, on the one hand, indicate that the terminal correctly receives the downlink reference signal triggered by the DCI (or that the terminal does not correctly receive the downlink reference signal triggered by the DCI), and on the other hand, indicate that the terminal correctly receives the DCI (or that the terminal does not correctly receive the DCI). As another example, the confirmation information may, on the one hand, indicate that the terminal correctly receives the downlink reference signal triggered by the DCI (or that the terminal does not correctly receive the downlink reference signal triggered by the DCI), and on the other hand, indicate that the terminal correctly receives the PDSCH triggered by the DCI (or that the terminal does not correctly receive the PDSCH triggered by the DCI).

[0125] Optionally, in these embodiments, the DCI also triggers the terminal to send at least one PUSCH or PUCCH to send acknowledgment information to the network-side device. This can be understood as follows: in addition to triggering the terminal to receive downlink reference signals or indicating downlink reference signal configuration, the DCI also triggers the terminal to send relevant acknowledgment information on at least one PUSCH or PUCCH.

[0126] If the network-side device and the terminal have inconsistent understandings, the terminal may fail to report CSI or report invalid CSI reports, leading to wasted resources and performance loss. Therefore, the above implementation helps the network-side device confirm whether the terminal has correctly obtained the CSI-RS configuration information or correctly received the CSI-RS. If it is confirmed that the terminal has received the CSI-RS, the network-side device can further schedule the terminal to report the CSI report associated with the CSI-RS, thereby avoiding the problem of inconsistent understanding between the network-side device and the terminal.

[0127] In some embodiments, the DCI is further used to indicate configuration information for N2 sets of reference signals or N2 reference signals, wherein the configuration information for the N2 sets of reference signals or N2 reference signals includes at least one of the following: serving cell indication information, carrier indication information, and physical cell indication information, wherein N2 is an integer greater than 0. This can be understood as: each reference signal set configuration signaling or reference signal configuration signaling includes: serving cell indication information, carrier indication information, or physical cell indication information.

[0128] Optionally, the DCI can indicate the N2 sets of reference signals or the configuration information of the reference signals through one AP CSI-RS indication field or CSI request field. Alternatively, multiple fields in the DCI can be used to jointly indicate the N2 sets of reference signals or the configuration information of the reference signals.

[0129] For example, the DCI is used to indicate N2 sets of reference signals or configuration information of the reference signals. The configuration information may include common resource IDs, period and time slot offsets, port numbers, time-frequency locations, CDM-types, density, or power parameters. Furthermore, the configuration information may include at least one of the following: serving cell indication information, carrier indication information, or physical cell indication information. This is used by the terminal to determine the reception parameters for receiving the corresponding reference signals.

[0130] For example, the bit sequence associated with the AP CSI-RS indication field indicates an element in a list pre-configured by higher-layer signaling, the element being associated with N1 sets of reference signals or configuration information of N1 reference signals, the configuration information including indication information used to indicate each set of reference signals or each reference signal associated with a serving cell or carrier or physical cell.

[0131] Optionally, the DCI can be a downlink DCI, an uplink DCI, a DCI dedicated to each terminal, or a DCI shared by a group of terminals.

[0132] In some embodiments, the DCI is further used to indicate a set of N3 reference signals or configuration information of N3 reference signals, wherein N3 is an integer greater than 0, and the set of N3 reference signals or configuration information of N3 reference signals satisfies one of the following:

[0133] 1) Configuration information of at least one set of reference signals or configuration information of one reference signal is associated with multiple CSI report configurations; this can be understood as: the network-side device indicates the multiple CSI report configurations associated with it (e.g., report configuration ID) in the configuration signaling of the reference signal set or the configuration signaling of the reference signal. It can also be understood as: the terminal determines the configuration information of any one set of reference signals or reference signal based on the DCI, and successfully receives the downlink reference signal based on the configuration information. Furthermore, the terminal can also determine the multiple CSI report configurations associated with the reference signal set or reference signal based on higher-layer signaling and the configuration information. Optionally, the terminal performs multiple CSI acquisition processes based on multiple CSI report configurations, or the terminal determines the associated reference signal set or reference signal based on multiple CSI report configurations associated with other DCIs, and further acquires the CSIs associated with the multiple CSI report configurations, wherein at least two of the multiple CSI report configurations may be associated with the same set of reference signals or reference signal.

[0134] 2) Each set of reference signals or each reference signal's configuration information is associated with a CSI report. This can be understood as: the network-side device indicates the associated CSI report configuration (e.g., report configuration ID) in the configuration signaling of the reference signal set or the reference signal. Alternatively, it can be understood as: the terminal determines the configuration information of any reference signal set or reference signal based on the DCI, and successfully receives the downlink reference signal based on the configuration information. Furthermore, the terminal can also determine a CSI report configuration associated with the reference signal set or reference signal based on higher-layer signaling and the configuration information, and perform a CSI acquisition process based on a CSI report configuration.

[0135] The above embodiments support triggering downlink reference signal reception or transmission for multiple cells or TRPs through a single DCI, and further support multiple CSI reports sharing a single reference signal set or reference signal. Therefore, the overhead of DCI resources or reference signal configuration information can be saved.

[0136] In some embodiments, the aforementioned target downlink reference signal may be a TRS, and the DCI may also be used to indicate the beam information of the network-side device or the beam information of the terminal (or it may be TCI information or quasi-co-location information).

[0137] In the above embodiments, when the DCI is also used to indicate the beam information, TCI information, or quasi-co-location information to be updated by the terminal, the terminal can first complete the TRS measurement and then update the beam information, TCI information, or quasi-co-location information indicated by the DCI.

[0138] Optionally, when the target downlink reference signal is TRS, the method may further include: the network device instructing the terminal to perform the following operations through the configuration of the DCI or higher-layer network signaling:

[0139] After performing the TRS measurement, update or use the beam information indicated by the DCI; or,

[0140] After updating or using the beam information indicated by the DCI, the TRS measurement is performed.

[0141] The terminal may determine to perform the following operations based on the configuration of the DCI or higher-layer network signaling: the terminal may first complete the TRS measurement and then update the beam information, TCI information or quasi-co-address information indicated by the DCI, or the terminal may first update the beam information, TCI information or quasi-co-address information indicated by the DCI and then complete the TRS measurement.

[0142] In the above embodiments, when the terminal updates the beam information, TCI information, or quasi-co-address information indicated by the DCI, the network-side device and the terminal need to determine the effective time of the beam information, TCI information, or quasi-co-address information to avoid performance loss due to inconsistent interpretations. One implementation for determining the effective time of the beam information indicated by the DCI is: Y symbols or Y time slots after the last symbol of the target downlink reference signal, where Y is an integer greater than 0. In this implementation, the effective time of the beam information indicated by the DCI is Y symbols or time slots after the last symbol of the TRS. Optionally, the value of Y is determined based on the terminal capability information.

[0143] Another implementation for determining the effective time of the beam information indicated by DCI is as follows: the effective time of the beam information indicated by DCI is the latest of the first time and the second time. The first time is Y1 symbols or Y1 time slots after the last symbol of the target downlink reference signal, and the second time is Y2 symbols or Y2 time slots after the last symbol of the acknowledgment information. Y1 and Y2 are integers greater than 0, and the acknowledgment information is the first acknowledgment information fed back by the terminal after the DCI. In this implementation, the effective time is the maximum value among Y1 symbols / slots after the last symbol of the TRS and Y2 symbols / slots after the last symbol of the ACK / NACK. Optionally, Y1 and Y2 may be different; Y1 is related to the terminal measurement time, and Y2 is related to the effectiveness of the network-side equipment. Optionally, the value of Y1 is determined based on terminal capability information. The maximum value can be understood as the latest value or the value furthest in time.

[0144] The aforementioned effective time can be understood as the start time of the first symbol that can use DCI-indicated beam information, TCI information, or quasi-co-address information, or the end time of the previous symbol.

[0145] If the terminal and network devices have inconsistent understandings of the effective time of the updated beam information, it may lead to a decrease in the reception performance of the terminal or network devices. Through the above implementation method, the terminal and network devices have a consistent understanding of the effective time of the beam information, TCI information, or quasi-co-address information indicated by the DCI, thereby avoiding a decrease in the reception performance of the terminal or network devices.

[0146] Based on the same technical concept, this application also provides a reference signal receiving method. This method is an execution method on the terminal side corresponding to the method 200 described above.

[0147] It should be noted that the following embodiments only describe the operation of the terminal. For other matters not covered, please refer to the relevant description of method 200 above.

[0148] Figure 3 shows a schematic flowchart of a reference signal receiving method provided in an embodiment of this application. This method 300 can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal. As shown in Figure 3, the method mainly includes the following steps.

[0149] S310, the terminal receives DCI sent by the network-side device.

[0150] In this embodiment of the application, the DCI is used to indicate the configuration of the target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is also used to indicate at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback, the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback.

[0151] The network-side device can send the DCI in the manner described in method 200 above. For details, please refer to the relevant description in method 200 above, which will not be repeated here.

[0152] S312, the terminal receives the target downlink reference signal sent by the network-side device based on the DCI.

[0153] In this embodiment, the terminal receives a configuration for indicating the target downlink reference signal or triggers the terminal to receive the target downlink reference signal sent by the network-side device based on the received DCI. The terminal can also determine whether to perform CSI measurement or CSI feedback based on the target downlink reference signal based on the received DCI.

[0154] The technical solution provided by the embodiments of this application allows the network-side device to send a DCI (Distributed Controlled Indicator) to the terminal for configuring a target downlink reference signal or triggering the terminal to receive the target downlink reference signal. This DCI can also be used to instruct the terminal to perform CSI (Continuous Search and Indication) measurements associated with the target downlink reference signal but without performing CSI feedback, or to instruct the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback. After receiving the DCI, the terminal performs corresponding operations based on the DCI's instructions, thereby enabling the network-side device to flexibly schedule the terminal's uplink transmission and improve resource utilization.

[0155] In some embodiments, the DCI is also used to indicate the configuration of at least one PDSCH or to trigger the terminal to receive at least one PDSCH; in these embodiments, the method may further include: when the terminal receives the at least one PDSCH, it performs rate matching based on the target downlink reference signal. That is, for any PDSCH, when the terminal performs rate matching upon reception, it only considers the CSI-RS or CSI-IM resource associated with the same DCI.

[0156] In some embodiments, the DCI is further used to: indicate at least one of the following configurations: at least one PUSCH and at least one PUCCH; or to trigger the terminal to perform at least one of the following transmissions: at least one PUSCH and at least one PUCCH. In these embodiments, the method may further include: the terminal transmitting the at least one PUSCH or at least one PUCCH based on the configuration indicated by the DCI or the transmission triggered by the terminal.

[0157] In some implementations, when the DCI triggers the transmission of at least one PUSCH or at least one PUCCH, the at least one PUSCH or at least one PUCCH includes at least one of the following features:

[0158] Uplink control information (UCI) is not included.

[0159] Excluding CSI, but including UCI;

[0160] The CSI associated with the target downlink reference signal is not included.

[0161] In some embodiments, when the DCI triggers the transmission of the at least one PUSCH, the DCI is also used to indicate that the at least one PUSCH includes at least one of the following features:

[0162] The at least one PUSCH includes a UCI, but the UCI does not include a CSI;

[0163] The at least one PUSCH does not include UCI;

[0164] The at least one PUSCH does not include the CSI associated with the target downlink reference signal.

[0165] In some embodiments, after the terminal receives the DCI sent by the network-side device, the method further includes: the terminal feeding back confirmation information to the network-side device, wherein the confirmation information is used to indicate at least one of the following:

[0166] The terminal correctly received the DCI;

[0167] The terminal did not receive the DCI correctly;

[0168] The terminal correctly receives the target downlink reference signal triggered by the DCI;

[0169] The terminal did not correctly receive the target downlink reference signal triggered by the DCI;

[0170] The terminal correctly receives the PDSCH triggered by the DCI;

[0171] The terminal did not correctly receive the PDSCH triggered by the DCI.

[0172] In some embodiments, the DCI includes an aperiodic CSI reference signal indication field, which is used to indicate the configuration information of the target downlink reference signal. The terminal can obtain the configuration information of the target downlink reference signal through the aperiodic CSI reference signal indication field in the DCI, and then receive the target downlink reference signal based on the configuration information.

[0173] In some implementations, the aperiodic CSI reference signal indication field can also be used to indicate the configuration information of the N1 reference signal set or N1 reference signals, where N1 is an integer greater than or equal to 1.

[0174] In some embodiments, the DCI may include a CSI request field, which indicates at least one of the following: configuration information of the target downlink reference signal, whether the terminal feeds back the CSI, whether the terminal acquires the CSI, whether the terminal acquires part or all of the CSI content, and the content configuration of the CSI acquired by the terminal. Based on the CSI request word of the DCI, the terminal can acquire at least one of the following: configuration information of the target downlink reference signal, whether the terminal feeds back the CSI, whether the terminal acquires the CSI, whether the terminal acquires part or all of the CSI content, and the content configuration of the CSI acquired by the terminal. This allows the terminal to receive the target downlink reference signal, determine whether to acquire or feed back the CSI, and, if necessary, determine whether to acquire part or all of the CSI content, or the content configuration of the acquired CSI. Based on the acquired information, the terminal can then perform corresponding operations. Optionally, the terminal determines to perform at least one of the following actions based on the CSI request field: the terminal determines the configuration information of the target downlink reference signal based on the indication of the CSI request field; the terminal determines to feedback the CSI associated with the CSI request field; the terminal determines not to feedback the CSI associated with the CSI request field; the terminal determines to acquire the CSI associated with the CSI request field; the terminal determines not to acquire the CSI associated with the CSI request field; the terminal determines to acquire part of the content of the CSI associated with the CSI request field; the terminal determines to acquire all the content of the CSI associated with the CSI request field; and the terminal determines to configure the content associated with the acquired CSI.

[0175] In some implementations, the CSI request field satisfies at least one of the following:

[0176] 1) The bit sequence associated with the CSI request field includes at least 1 bit, which is used to determine whether the terminal should respond to the CSI.

[0177] 2) The CSI request field is used to indicate a target triggering state, which is a triggering state in a triggering state list configured by higher-layer signaling. The triggering state list includes at least one first state associated with configuration information of at least one downlink reference signal, or at least one second state associated with configuration of at least one CSI report. When the target triggering state is the first state, the DCI instructs the terminal not to report the CSI. When the target triggering state is the second state, the DCI instructs the terminal to report the CSI.

[0178] 3) The CSI request field is used to indicate the target CSI report configuration, which is at least one of multiple CSI report configurations in the higher-layer signaling configuration. If the CSI report content associated with the target CSI report configuration is empty, the DCI instructs the terminal not to report the CSI. If the CSI report content associated with the target CSI report configuration is not empty, the DCI instructs the terminal to report the CSI.

[0179] 4) The CSI request field is used to indicate a target trigger state, which is a trigger state in the trigger state list configured by higher layer signaling. The trigger state list includes at least one fourth state that indicates that the terminal does not feed back the CSI. When the target trigger state is the fourth state, the DCI indicates that the terminal does not feed back the CSI.

[0180] 5) The CSI request field is used to indicate the target CSI report configuration, which includes at least one first CSI report configuration or at least one second CSI report configuration among a plurality of CSI report configurations of higher-layer signaling configuration. The plurality of CSI report configurations include at least one pair of CSI report configurations, which includes a first CSI report configuration and a second CSI report configuration. The pair of CSI report configurations are associated with the same CSI reference signal configuration information.

[0181] In some optional implementations, the CSI content associated with the first CSI report configuration is empty; or, the first CSI report configuration is associated with a portion of the CSI content and the second CSI report configuration is associated with another portion of the CSI content.

[0182] 6) The CSI request field is used to indicate the target CSI report configuration, which includes at least one third CSI report configuration among a plurality of CSI report configurations of higher-layer signaling configuration. The third report configuration is associated with a fourth report configuration through network signaling. The third report configuration includes configuration information of at least one downlink reference signal.

[0183] In some optional implementations, the configuration information of the downlink reference signal associated with the fourth report configuration is the configuration information of at least one downlink reference signal included in the third report configuration; or, the CSI content associated with the third report configuration is empty; or, the third CSI report configuration is associated with a portion of the CSI content and the fourth CSI report configuration is associated with another portion of the CSI content.

[0184] In some embodiments, the DCI is used to indicate configuration information of N2 sets of reference signals or N2 reference signals, wherein the configuration information of the N2 sets of reference signals or N2 reference signals includes at least one of the following: serving cell indication information, carrier indication information, and physical cell indication information, wherein N2 is an integer greater than 0; or, the DCI is used to indicate configuration information of N3 sets of reference signals or N3 reference signals, wherein N3 is an integer greater than 0, wherein the configuration information of the N3 sets of reference signals or N3 reference signals satisfies one of the following:

[0185] Configuration information for at least one set of reference signals, or configuration information for one reference signal associated with multiple CSI report configurations;

[0186] The configuration information for each set of reference signals or the configuration information for each reference signal is associated with a CSI report.

[0187] In some embodiments, when the target downlink reference signal is a Tracking CSI Reference Signal (TRS), the DCI is further used to indicate the beam information of the network-side device or the beam information of the terminal. In these embodiments, the method may further include: the terminal determining the beam information to use based on the indication of the DCI. Alternatively, the terminal may determine to perform the following operations based on the DCI or network higher-layer signaling configuration: the terminal may first complete the TRS measurement and then update the beam information, TCI information, or quasi-co-address information indicated by the DCI; or the terminal may first update the beam information, TCI information, or quasi-co-address information indicated by the DCI and then complete the TRS measurement.

[0188] In some embodiments, the effective time of the beam information indicated by the DCI includes one of the following:

[0189] The target downlink reference signal consists of Y symbols or Y time slots following the last symbol, where Y is an integer greater than 0;

[0190] The latest of the first time and the second time, wherein the first time is Y1 symbols or Y1 time slots after the last symbol of the target downlink reference signal, and the second time is Y2 symbols or Y2 time slots after the last symbol of the confirmation information, where Y1 and Y2 are integers greater than 0, and the confirmation information is the first confirmation information fed back by the terminal after the DCI.

[0191] The terminal uses the beam information indicated by the DCI at the determined effective time.

[0192] The reference signal transmission / reception method provided in this application can be executed by a reference signal transmission / reception device. This application uses an example of a reference signal transmission / reception device executing the reference signal transmission / reception method to illustrate the reference signal transmission / reception device provided in this application.

[0193] This application provides a reference signal transmitting / receiving device. As an example, the reference signal transmitting / receiving device may be a communication device or a component within a communication device, such as a chip. The communication device may be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal may include, but is not limited to, the type of terminal 11 listed above, and the network-side device may include, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0194] The reference signal transmitting / receiving device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0195] Specifically, referring to Figure 4, when the reference signal transmitting device is a network-side device or a component within a network-side device, the reference signal transmitting device 400 includes a transmitting module 401 that transmits a DCI to the terminal. The DCI is used to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal. The DCI is also used to instruct at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback. The transmitting module 401 is also used to transmit the target downlink reference signal to the terminal based on the transmitted DCI.

[0196] In an optional implementation, the DCI is further used to indicate the configuration of at least one Physical Downlink Shared Channel (PDSCH) or to trigger the terminal to receive at least one PDSCH; as shown in FIG4, the device further includes: a processing module 402, used to perform rate matching on the target downlink reference signal when the transmitting module 401 transmits the at least one PDSCH.

[0197] In an optional implementation, the DCI is further used to: indicate at least one of the following configurations: at least one Physical Uplink Shared Channel (PUSCH) and at least one Physical Uplink Control Channel (PUCCH); or to trigger the terminal to perform at least one of the following transmissions: at least one PUSCH and at least one PUCCH.

[0198] In an alternative implementation, when the DCI triggers the transmission of the at least one PUSCH, the at least one PUSCH includes at least one of the following features:

[0199] Excluding uplink control information (UCI);

[0200] Excluding CSI, but including UCI;

[0201] This excludes the CSI associated with the target downlink reference signal.

[0202] In an alternative implementation, when the DCI triggers the transmission of the at least one PUSCH, the DCI is further used to indicate that the at least one PUSCH includes at least one of the following features:

[0203] The at least one PUSCH includes a UCI, but the UCI does not include a CSI;

[0204] The at least one PUSCH does not include UCI;

[0205] The at least one PUSCH does not include the CSI associated with the target downlink reference signal.

[0206] In an optional implementation, as shown in FIG4, the device may further include: a receiving module 403, configured to receive confirmation information fed back by the terminal, wherein the confirmation information is used to indicate at least one of the following:

[0207] The terminal correctly received the DCI;

[0208] The terminal did not receive the DCI correctly;

[0209] The terminal correctly receives the target downlink reference signal triggered by the DCI;

[0210] The terminal did not correctly receive the target downlink reference signal triggered by the DCI;

[0211] The terminal correctly receives the PDSCH triggered by the DCI;

[0212] The terminal did not correctly receive the PDSCH triggered by the DCI.

[0213] In one optional implementation, the DCI includes an aperiodic CSI reference signal indication field, which is used to indicate configuration information of the target downlink reference signal.

[0214] In one optional implementation, the aperiodic CSI reference signal indication field is used to indicate the configuration information of the N1 reference signal set or N1 reference signals, where N1 is an integer greater than or equal to 1.

[0215] In an optional implementation, the DCI includes a CSI request field, which indicates at least one of the following: configuration information of the target downlink reference signal, whether the terminal feeds back the CSI, whether the terminal acquires the CSI, whether the terminal acquires part or all of the CSI, and the configuration of the CSI acquired by the terminal.

[0216] In one optional implementation, the CSI request field satisfies at least one of the following:

[0217] The bit sequence associated with the CSI request field includes at least one bit, which is used to determine whether the terminal should respond to the CSI.

[0218] The CSI request field is used to indicate a target trigger state, which is a trigger state in a trigger state list configured by higher-layer signaling. The trigger state list includes at least one first state associated with configuration information of at least one downlink reference signal, or at least one second state associated with at least one CSI report configuration. When the target trigger state is the first state, the DCI instructs the terminal not to report the CSI. When the target trigger state is the second state, the DCI instructs the terminal to report the CSI.

[0219] The CSI request field is used to indicate the target CSI report configuration, which is at least one of multiple CSI report configurations in the higher-layer signaling configuration. If the CSI report content associated with the target CSI report configuration is empty, the DCI instructs the terminal not to report the CSI. If the CSI report content associated with the target CSI report configuration is not empty, the DCI instructs the terminal to report the CSI.

[0220] The CSI request field is used to indicate a target trigger state, which is a trigger state in a trigger state list configured by higher-layer signaling. The trigger state list includes at least one fourth state that indicates that the terminal does not feed back the CSI. When the target trigger state is the fourth state, the DCI indicates that the terminal does not feed back the CSI.

[0221] The CSI request field is used to indicate the target CSI report configuration, which includes at least one first CSI report configuration or at least one second CSI report configuration among a plurality of CSI report configurations of higher-layer signaling configuration. The plurality of CSI report configurations include at least one pair of CSI report configurations, which includes a first CSI report configuration and a second CSI report configuration. The pair of CSI report configurations is associated with the same CSI reference signal configuration information.

[0222] The CSI request field is used to indicate a target CSI report configuration, which includes at least one third CSI report configuration among a plurality of CSI report configurations of higher-layer signaling configuration. The third report configuration is associated with a fourth report configuration through network signaling. The third report configuration includes configuration information of at least one downlink reference signal.

[0223] In one optional implementation, the CSI content associated with the first CSI report configuration is empty; or, the first CSI report configuration is associated with a portion of the CSI content and the second CSI report configuration is associated with another portion of the CSI content.

[0224] In one optional implementation, the configuration information of the downlink reference signal associated with the fourth report configuration is the configuration information of at least one downlink reference signal included in the third report configuration; or, the CSI content associated with the third report configuration is empty; or, the third CSI report configuration is associated with a portion of the CSI content and the fourth CSI report configuration is associated with another portion of the CSI content.

[0225] In one optional implementation, the DCI is used to indicate a set of N2 reference signals or configuration information of N2 reference signals, wherein the set of N2 reference signals or configuration information of N2 reference signals includes at least one of the following: serving cell indication information, carrier indication information, and physical cell indication information, wherein N2 is an integer greater than 0; or,

[0226] The DCI is used to indicate the configuration information of the N3 reference signal set or the N3 reference signals, wherein the N3 reference signal set or the configuration information of the N3 reference signals satisfies one of the following:

[0227] Configuration information for at least one set of reference signals, or configuration information for one reference signal associated with multiple CSI report configurations;

[0228] The configuration information for each set of reference signals or the configuration information for each reference signal is associated with a CSI report;

[0229] Where N3 is an integer greater than 0.

[0230] In an alternative implementation, when the target downlink reference signal is a tracking CSI reference signal (TRS), the DCI is also used to indicate the beam information of the network-side device or the beam information of the terminal.

[0231] In one optional implementation, the effective time of the beam information indicated by the DCI includes one of the following:

[0232] The target downlink reference signal consists of Y symbols or Y time slots following the last symbol, where Y is an integer greater than 0;

[0233] The latest of the first and second times, wherein the first time is Y1 symbols or Y1 time slots after the last symbol of the target downlink reference signal, and the second time is Y2 symbols or Y2 time slots after the last symbol of the confirmation information, where Y1 and Y2 are rational numbers, and the confirmation information is the first confirmation information fed back by the terminal after the DCI.

[0234] In an optional implementation, as shown in Figure 4, the device further includes a processing module 402, configured to instruct the terminal to perform the following operations based on the configuration of the DCI or higher-layer network signaling:

[0235] After performing the TRS measurement, update or use the beam information indicated by the DCI; or,

[0236] After updating or using the beam information indicated by the DCI, the TRS measurement is performed.

[0237] Referring to Figure 5, when the reference signal receiving device is a terminal or a component within a terminal, the reference signal receiving device n00 includes a receiving module 501, used to receive a DCI sent by a network-side device. The DCI is used to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal. The DCI is also used to instruct at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback. The receiving module 501 is also used to receive the target downlink reference signal sent by the network-side device based on the DCI.

[0238] In an optional implementation, the DCI is further used to indicate the configuration of at least one Physical Downlink Shared Channel (PDSCH) or to trigger the terminal to receive at least one PDSCH; the apparatus may further include: a processing module 502, used to perform rate matching on the target downlink reference signal when the receiving module 501 receives the at least one PDSCH.

[0239] In an optional implementation, the DCI is further used to: indicate at least one of the following configurations: at least one PUSCH, at least one PUCCH; or, trigger the terminal to perform at least one of the following transmissions: at least one PUSCH, at least one PUCCH; as shown in FIG5, the apparatus may further include: a transmission module 503, used to transmit the at least one PUSCH or at least one PUCCH based on the configuration indicated by the DCI or the transmission triggered by the transmission.

[0240] In an alternative implementation, when the DCI triggers the transmission of the at least one PUSCH, the at least one PUSCH includes at least one of the following features:

[0241] Excluding uplink control information (UCI);

[0242] Excluding CSI, but including UCI;

[0243] This excludes the CSI associated with the target downlink reference signal.

[0244] In an alternative implementation, when the DCI triggers the transmission of the at least one PUSCH, the DCI is further used to indicate that the at least one PUSCH includes at least one of the following features:

[0245] The at least one PUSCH includes a UCI, but the UCI does not include a CSI;

[0246] The at least one PUSCH does not include UCI;

[0247] The at least one PUSCH does not include the CSI associated with the target downlink reference signal.

[0248] In an optional implementation, as shown in FIG5, the device may further include: a sending module 503, configured to send confirmation information back to the network-side device, wherein the confirmation information is used to indicate at least one of the following:

[0249] The DCI is received correctly;

[0250] The DCI was not received correctly;

[0251] Correctly receive the target downlink reference signal triggered by the DCI;

[0252] The target downlink reference signal triggered by the DCI was not received correctly;

[0253] Correctly receive the PDSCH triggered by the DCI;

[0254] The DCI-triggered PDSCH was not received correctly.

[0255] In one optional implementation, the DCI includes an aperiodic CSI reference signal indication field, which is used to indicate configuration information of the target downlink reference signal.

[0256] In one optional implementation, the aperiodic CSI reference signal indication field is used to indicate the configuration information of the N1 reference signal set or N1 reference signals, where N1 is an integer greater than or equal to 1.

[0257] In an optional implementation, the DCI includes a CSI request field, as shown in FIG5. The apparatus may further include: a processing module 502, which determines to perform at least one of the following actions based on the CSI request field: determining the configuration information of the target downlink reference signal based on the indication of the CSI request field; determining to feed back the CSI associated with the CSI request field; determining not to feed back the CSI associated with the CSI request field; determining to acquire the CSI associated with the CSI request field; determining not to acquire the CSI associated with the CSI request field; determining to acquire part of the content of the CSI associated with the CSI request field; determining to acquire all the content of the CSI associated with the CSI request field; and determining the configuration of the content associated with the acquired CSI.

[0258] In one optional implementation, the CSI request field satisfies at least one of the following:

[0259] The bit sequence associated with the CSI request field includes at least one bit, which is used to determine whether the terminal should respond to the CSI.

[0260] The CSI request field is used to indicate a target trigger state, which is a trigger state in a trigger state list configured by higher-layer signaling. The trigger state list includes at least one first state associated with configuration information of at least one downlink reference signal, or at least one second state associated with at least one CSI report configuration. When the target trigger state is the first state, the DCI instructs the terminal not to report the CSI. When the target trigger state is the second state, the DCI instructs the terminal to report the CSI.

[0261] The CSI request field is used to indicate the target CSI report configuration, which is at least one of multiple CSI report configurations in the higher-layer signaling configuration. If the CSI report content associated with the target CSI report configuration is empty, the DCI instructs the terminal not to report the CSI. If the CSI report content associated with the target CSI report configuration is not empty, the DCI instructs the terminal to report the CSI.

[0262] The CSI request field is used to indicate a target trigger state, which is a trigger state in a trigger state list configured by higher-layer signaling. The trigger state list includes at least one fourth state that indicates that the terminal does not feed back the CSI. When the target trigger state is the fourth state, the DCI indicates that the terminal does not feed back the CSI.

[0263] The CSI request field is used to indicate the target CSI report configuration, which includes at least one first CSI report configuration or at least one second CSI report configuration among a plurality of CSI report configurations of higher-layer signaling configuration. The plurality of CSI report configurations include at least one pair of CSI report configurations, which includes a first CSI report configuration and a second CSI report configuration. The pair of CSI report configurations is associated with the same CSI reference signal configuration information.

[0264] The CSI request field is used to indicate a target CSI report configuration, which includes at least one third CSI report configuration among a plurality of CSI report configurations of higher-layer signaling configuration. The third report configuration is associated with a fourth report configuration through network signaling. The third report configuration includes configuration information of at least one downlink reference signal.

[0265] In one optional implementation, the CSI content associated with the first CSI report configuration is empty; or, the first CSI report configuration is associated with a portion of the CSI content and the second CSI report configuration is associated with another portion of the CSI content.

[0266] In one optional implementation, the configuration information of the downlink reference signal associated with the fourth report configuration is the configuration information of at least one downlink reference signal included in the third report configuration; or, the CSI content associated with the third report configuration is empty; or, the third CSI report configuration is associated with a portion of the CSI content and the fourth CSI report configuration is associated with another portion of the CSI content.

[0267] In one optional implementation, the DCI is used to indicate N2 sets of reference signals or configuration information of N2 reference signals, wherein the N2 sets of reference signals or configuration information of N2 reference signals include at least one of the following: serving cell indication information, carrier indication information, and physical cell indication information, wherein N2 is an integer greater than 0; or, the DCI is used to indicate N3 sets of reference signals or configuration information of N3 reference signals, wherein the N3 sets of reference signals or configuration information of N3 reference signals satisfy one of the following:

[0268] Configuration information for at least one set of reference signals, or configuration information for one reference signal associated with multiple CSI report configurations;

[0269] The configuration information for each set of reference signals or the configuration information for each reference signal is associated with a CSI report;

[0270] Where N3 is an integer greater than 0.

[0271] In an optional implementation, when the target downlink reference signal is a tracking CSI reference signal (TRS), the DCI is further used to indicate the beam information of the network-side device or the beam information of the terminal; as shown in FIG5, the device may further include: a processing module 502, used to determine the beam information used by the network-side device or the terminal based on the indication of the DCI; and to determine the effective time of the beam information based on the indication of the DCI.

[0272] In one optional implementation, the effective time of the beam information indicated by the DCI includes one of the following:

[0273] The target downlink reference signal consists of Y symbols or Y time slots following the last symbol, where Y is an integer greater than 0;

[0274] The latest of the first time and the second time, wherein the first time is Y1 symbols or Y1 time slots after the last symbol of the target downlink reference signal, and the second time is Y2 symbols or Y2 time slots after the last symbol of the confirmation information, where Y1 and Y2 are integers greater than 0, and the confirmation information is the first confirmation information fed back by the terminal after the DCI.

[0275] In an optional implementation, the processing module is further configured to determine, based on the configuration of the DCI or higher-layer network signaling, to perform the following operations:

[0276] After performing the TRS measurement, update the beam information indicated by the DCI; or,

[0277] After updating the beam information indicated by the DCI, the TRS measurement is performed.

[0278] The reference signal transmitting / receiving device provided in this application embodiment can implement the various processes implemented in the method embodiments of FIG2 to FIG3 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0279] As shown in Figure 6, this application embodiment also provides a communication device 600, including a processor 601 and a memory 602. The memory 602 stores a program or instructions that can run on the processor 601. For example, when the communication device 600 is a terminal, the program or instructions executed by the processor 601 implement the various steps of the above-described reference signal receiving method embodiment and achieve the same technical effect. When the communication device 600 is a network-side device, the program or instructions executed by the processor 601 implement the various steps of the above-described reference signal transmitting method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0280] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiments shown in Figures 2 and 3. This terminal embodiment corresponds to the above-described terminal-side method embodiments, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. The terminal may be the reference signal receiving device shown in Figure 5. Specifically, Figure 7 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0281] The terminal 700 includes, but is not limited to, at least some of the following components: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, and processor 710.

[0282] Those skilled in the art will understand that the terminal 700 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to the processor 710 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. The terminal structure shown in Figure 7 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0283] It should be understood that, in this embodiment, the input unit 704 may include a graphics processor 7041 and a microphone 7042. The graphics processor 7041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0284] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 701 can transmit it to the processor 710 for processing; in addition, the radio frequency unit 701 can send uplink data to the network-side device. Typically, the radio frequency unit 701 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0285] The memory 709 can be used to store software programs or instructions, as well as various data. The memory 709 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 709 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 709 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0286] Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 710.

[0287] The radio frequency unit 701 is used for:

[0288] The device receives a DCI sent by a network-side device, wherein the DCI is used to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is also used to instruct at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback.

[0289] The target downlink reference signal is received from the network-side device based on the DCI.

[0290] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiment 300 and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0291] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG2. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0292] Specifically, this application embodiment also provides a network-side device, which may be the reference signal transmitting device shown in FIG4. As shown in FIG8, the network-side device 800 includes: an antenna 801, a radio frequency device 802, a baseband device 803, a processor 804, and a memory 805. The antenna 801 is connected to the radio frequency device 802. In the uplink direction, the radio frequency device 802 receives information through the antenna 801 and sends the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information to be transmitted and sends it to the radio frequency device 802. The radio frequency device 802 processes the received information and transmits it through the antenna 801.

[0293] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 803, which includes a baseband processor.

[0294] The baseband device 803 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG8. One of the chips is, for example, a baseband processor, which is connected to the memory 805 via a bus interface to call the program in the memory 805 and execute the network device operation shown in the above method embodiment.

[0295] The network-side device may also include a network interface 806, such as a Common Public Radio Interface (CPRI).

[0296] Specifically, the network-side device 800 in this application embodiment further includes: instructions or programs stored in memory 805 and executable on processor 804. Processor 804 calls the instructions or programs in memory 805 to execute the methods executed by each module shown in FIG4 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0297] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described reference signal transmission method embodiment or the various processes of the above-described reference signal reception method embodiment, and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0298] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0299] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described reference signal transmission method embodiment or the various processes of the above-described reference signal reception method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0300] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0301] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described reference signal transmission method embodiment or the various processes of the above-described reference signal reception method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0302] This application also provides a wireless communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute various processes of the reference signal receiving method embodiment described above, and the network-side device can be used to execute various processes of the reference signal transmitting method embodiment described above.

[0303] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0304] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0305] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A method for transmitting a reference signal, comprising: The network-side device sends downlink control information (DCI) to the terminal, wherein the DCI is used to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is also used to instruct at least one of the following actions: the DCI instructs the terminal to perform channel state information (CSI) measurement based on the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurement based on the target downlink reference signal and not to perform CSI feedback. The network-side device sends the target downlink reference signal to the terminal based on the transmitted DCI.

2. The method according to claim 1, wherein, The DCI is also used to indicate the configuration of at least one Physical Downlink Shared Channel (PDSCH) or to trigger the terminal to receive at least one PDSCH. The method further includes: when the network-side device sends the at least one PDSCH, performing rate matching on the target downlink reference signal.

3. The method according to claim 1 or 2, wherein, The DCI is also used for: Instructing at least one of the following configurations: at least one Physical Uplink Shared Channel (PUSCH) and at least one Physical Uplink Control Channel (PUCCH); or triggering the terminal to perform at least one of the following transmissions: at least one PUSCH and at least one PUCCH; Wherein, the at least one PUSCH or at least one PUCCH includes at least one of the following features: Excluding uplink control information (UCI); Excluding CSI, but including UCI; This excludes the CSI associated with the target downlink reference signal.

4. The method according to claim 3, wherein, When the DCI triggers the transmission of the at least one PUSCH, the DCI is also used to indicate that the at least one PUSCH includes at least one of the following features: The at least one PUSCH includes a UCI, but the UCI does not include a CSI; The at least one PUSCH does not include UCI; The at least one PUSCH does not include the CSI associated with the target downlink reference signal.

5. The method according to any one of claims 1 to 4, wherein, After the network-side device sends downlink control information (DCI) to the terminal, the method further includes: The network-side device receives confirmation information from the terminal, wherein the confirmation information indicates at least one of the following: The terminal correctly received the DCI; The terminal did not receive the DCI correctly; The terminal correctly receives the target downlink reference signal triggered by the DCI; The terminal did not correctly receive the target downlink reference signal triggered by the DCI; The terminal correctly receives the PDSCH triggered by the DCI; The terminal did not correctly receive the PDSCH triggered by the DCI.

6. The method according to any one of claims 1 to 5, wherein, The DCI includes an aperiodic CSI reference signal indication field, which is used to indicate the configuration information of the target downlink reference signal.

7. The method according to claim 6, wherein, The aperiodic CSI reference signal indication field is used to indicate the configuration information of the N1 reference signal set or N1 reference signals, where N1 is an integer greater than or equal to 1.

8. The method according to any one of claims 1 to 5, wherein, The DCI includes a CSI request field, which indicates at least one of the following: configuration information of the target downlink reference signal, whether the terminal feeds back the CSI, whether the terminal acquires the CSI, whether the terminal acquires part or all of the CSI, and the configuration of the CSI acquired by the terminal.

9. The method according to claim 8, wherein, The CSI request field satisfies at least one of the following: The bit sequence associated with the CSI request field includes at least one bit, which is used to determine whether the terminal should respond to the CSI. The CSI request field is used to indicate a target trigger state, which is a trigger state in a trigger state list. The trigger state list is configured by higher-layer signaling and includes at least one first state or at least one second state. The at least one first state is associated with configuration information of at least one downlink reference signal, and the at least one second state is associated with at least one CSI report configuration. When the target trigger state is the first state, the DCI instructs the terminal not to report the CSI. When the target trigger state is the second state, the DCI instructs the terminal to report the CSI. The CSI request field is used to indicate the target CSI report configuration, which is at least one of a plurality of CSI report configurations. The plurality of CSI report configurations are configured by higher-layer signaling. If the CSI report content associated with the target CSI report configuration is empty, the DCI instructs the terminal not to report the CSI. If the CSI report content associated with the target CSI report configuration is not empty, the DCI instructs the terminal to report the CSI. The CSI request field is used to indicate a target trigger state, which is a trigger state in a trigger state list configured by higher-layer signaling. The trigger state list includes at least one fourth state, which indicates that the terminal does not feed back the CSI. When the target trigger state is the fourth state, the DCI indicates that the terminal does not feed back the CSI. The CSI request field is used to indicate a target CSI report configuration. The target CSI report configuration includes at least one first CSI report configuration or at least one second CSI report configuration from a plurality of higher-layer signaling CSI report configurations. The plurality of CSI report configurations include at least one pair of CSI report configurations. The pair of CSI report configurations includes one first CSI report configuration and one second CSI report configuration. The pair of CSI report configurations are associated with the same CSI reference signal configuration information. The CSI content associated with the first CSI report configuration is empty; or, the first CSI report configuration is associated with a portion of the CSI content and the second CSI report configuration is associated with another portion of the CSI content. The CSI request field is used to indicate a target CSI report configuration, which includes at least one third CSI report configuration among multiple CSI report configurations of higher-layer signaling configurations. The third report configuration is associated with a fourth report configuration via network signaling. The third report configuration includes configuration information of at least one downlink reference signal. The configuration information of the downlink reference signal associated with the fourth report configuration is the configuration information of at least one downlink reference signal included in the third report configuration. Alternatively, the CSI content associated with the third report configuration is empty. Or, the third CSI report configuration is associated with a portion of the CSI content and the fourth CSI report configuration is associated with another portion of the CSI content.

10. The method according to any one of claims 1 to 5, wherein, The DCI is used to indicate the configuration information of N2 sets of reference signals or N2 reference signals, wherein the configuration information of the N2 sets of reference signals or N2 reference signals includes at least one of the following: serving cell indication information, carrier indication information, and physical cell indication information, wherein N2 is an integer greater than 0; or, The DCI is used to indicate the configuration information of the N3 reference signal set or the N3 reference signals, wherein the N3 reference signal set or the configuration information of the N3 reference signals satisfies one of the following: Configuration information for at least one set of reference signals, or configuration information for one reference signal associated with multiple CSI report configurations; The configuration information for each set of reference signals or the configuration information for each reference signal is associated with a CSI report; Where N3 is an integer greater than 0.

11. The method according to any one of claims 1 to 5, wherein, When the target downlink reference signal is a tracking reference signal (TRS), the DCI is also used to indicate the beam information of the network-side device or the beam information of the terminal.

12. The method according to claim 11, wherein, The effective time of the beam information indicated by the DCI includes one of the following: The target downlink reference signal consists of Y symbols or Y time slots following the last symbol, where Y is an integer greater than 0; The latest of the first and second times, wherein the first time is Y1 symbols or Y1 time slots after the last symbol of the target downlink reference signal, and the second time is Y2 symbols or Y2 time slots after the last symbol of the confirmation information, where Y1 and Y2 are rational numbers, and the confirmation information is the first confirmation information fed back by the terminal after the DCI.

13. The method according to claim 11, wherein, When the target downlink reference signal is a tracking reference signal (TRS), the method further includes: The network device, through the configuration of the DCI or higher-layer network signaling, instructs the terminal to perform the following operations: After performing the TRS measurement, update or use the beam information indicated by the DCI; or, After updating or using the beam information indicated by the DCI, the TRS measurement is performed.

14. A method for receiving a reference signal, comprising: The terminal receives a DCI sent by a network-side device, wherein the DCI is used to indicate the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is also used to indicate at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback. The terminal receives the target downlink reference signal sent by the network-side device based on the DCI.

15. The method according to claim 14, wherein, The DCI is also used to indicate the configuration of at least one Physical Downlink Shared Channel (PDSCH) or to trigger the terminal to receive at least one PDSCH. The method further includes: when the terminal receives the at least one PDSCH, it performs rate matching on the target downlink reference signal.

16. The method according to claim 14 or 15, wherein, The method further includes: the terminal sending the at least one PUSCH or at least one PUCCH based on the configuration indicated by the DCI or based on the triggering of the DCI; Wherein, the at least one PUSCH or at least one PUCCH includes at least one of the following features: Excluding uplink control information (UCI); Excluding CSI, but including UCI; This excludes the CSI associated with the target downlink reference signal.

17. The method according to claim 16, wherein, When the DCI triggers the transmission of the at least one PUSCH, the DCI is also used to indicate that the at least one PUSCH includes at least one of the following features: The at least one PUSCH includes a UCI, but the UCI does not include a CSI; The at least one PUSCH does not include UCI; The at least one PUSCH does not include the CSI associated with the target downlink reference signal.

18. The method according to any one of claims 14 to 17, wherein, After the terminal receives the DCI sent by the network-side device, the method further includes: The confirmation information fed back by the terminal to the network-side device, wherein the confirmation information is used to indicate at least one of the following: The terminal correctly received the DCI; The terminal did not receive the DCI correctly; The terminal correctly receives the target downlink reference signal triggered by the DCI; The terminal did not correctly receive the target downlink reference signal triggered by the DCI; The terminal correctly receives the PDSCH triggered by the DCI; The terminal did not correctly receive the PDSCH triggered by the DCI.

19. The method according to any one of claims 14 to 18, wherein, The DCI includes a CSI request field, and the terminal determines to perform at least one of the following actions based on the CSI request field: the terminal determines the configuration information of the target downlink reference signal based on the indication of the CSI request field; the terminal determines to feed back the CSI associated with the CSI request field; the terminal determines not to feed back the CSI associated with the CSI request field; the terminal determines to acquire the CSI associated with the CSI request field; the terminal determines not to acquire the CSI associated with the CSI request field; the terminal determines to acquire part of the content of the CSI associated with the CSI request field; the terminal determines to acquire all the content of the CSI associated with the CSI request field; and the terminal determines to configure the content associated with the acquired CSI.

20. The method according to any one of claims 14 to 18, wherein, When the target downlink reference signal is a tracking reference signal (TRS), the method further includes: The terminal determines the beam information of the network-side device or the beam information of the terminal based on the DCI; The terminal determines the effective time of the beam information based on the instruction of the DCI; The effective time of the beam information indicated by the DCI includes one of the following: The target downlink reference signal consists of Y symbols or Y time slots following the last symbol, where Y is an integer greater than 0; The latest of the first time and the second time, wherein the first time is Y1 symbols or Y1 time slots after the last symbol of the target downlink reference signal, and the second time is Y2 symbols or Y2 time slots after the last symbol of the confirmation information, where Y1 and Y2 are integers greater than 0, and the confirmation information is the first confirmation information fed back by the terminal after the DCI.

21. The method according to any one of claims 14 to 18, wherein, When the target downlink reference signal is a tracking reference signal (TRS), the method further includes: The terminal determines to perform the following operations based on the configuration of the DCI or higher-layer network signaling: After performing the TRS measurement, update or use the beam information indicated by the DCI; or, After updating or using the beam information indicated by the DCI, the TRS measurement is performed.

22. A reference signal transmitting device, comprising: A transmitting module is configured to transmit a DCI to a terminal, wherein the DCI is configured to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is further configured to instruct at least one of the following actions: the DCI instructs the terminal to perform channel state information (CSI) measurements associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback. The transmitting module is further configured to transmit the target downlink reference signal to the terminal based on the transmitted DCI.

23. The apparatus according to claim 22, wherein, The DCI is also used to indicate the configuration of at least one Physical Downlink Shared Channel (PDSCH) or to trigger the terminal to receive at least one PDSCH. The apparatus further includes a processing module, used to perform rate matching on the target downlink reference signal when the transmitting module transmits the at least one PDSCH.

24. The apparatus according to claim 22 or 23, wherein, Also includes: A receiving module is configured to receive confirmation information from the terminal, wherein the confirmation information indicates at least one of the following: The terminal correctly received the DCI; The terminal did not receive the DCI correctly; The terminal correctly receives the target downlink reference signal triggered by the DCI; The terminal did not correctly receive the target downlink reference signal triggered by the DCI; The terminal correctly receives the PDSCH triggered by the DCI; The terminal did not correctly receive the PDSCH triggered by the DCI.

25. A reference signal receiving device, comprising: A receiving module is configured to receive a DCI sent by a network-side device, wherein the DCI is configured to instruct the configuration of a target downlink reference signal or to trigger the terminal to receive the target downlink reference signal, and the DCI is further configured to instruct at least one of the following actions: the DCI instructs the terminal to perform CSI measurements associated with the target downlink reference signal but not to perform CSI feedback; the DCI instructs the terminal not to perform CSI measurements associated with the target downlink reference signal and not to perform CSI feedback. The receiving module is further configured to receive the target downlink reference signal sent by the network-side device based on the DCI.

26. The apparatus according to claim 25, wherein, The DCI is also used to indicate the configuration of at least one Physical Downlink Shared Channel (PDSCH) or to trigger the terminal to receive at least one PDSCH. The apparatus further includes a processing module, configured to perform rate matching on the target downlink reference signal when the receiving module receives the at least one PDSCH.

27. The apparatus according to claim 25 or 26, wherein, The DCI is also used to: indicate at least one of the following configurations: at least one PUSCH, at least one PUCCH; or to trigger the terminal to perform at least one of the following transmissions: at least one PUSCH, at least one PUCCH; The apparatus further includes a transmission module for transmitting the at least one PUSCH or at least one PUCCH based on the configuration or triggering of the DCI indication.

28. The apparatus according to any one of claims 25 to 27, wherein, Also includes: A sending module is configured to send confirmation information back to the network-side device, wherein the confirmation information indicates at least one of the following: The DCI is received correctly; The DCI was not received correctly; Correctly receive the target downlink reference signal triggered by the DCI; The target downlink reference signal triggered by the DCI was not received correctly; Correctly receive the PDSCH triggered by the DCI; The DCI-triggered PDSCH was not received correctly.

29. A network-side device, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the reference signal transmission method as claimed in any one of claims 1 to 13.

30. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the reference signal receiving method as claimed in any one of claims 14 to 21.

31. A readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the reference signal transmission method as claimed in any one of claims 1 to 13, or the steps of the reference signal reception method as claimed in any one of claims 14 to 21.

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