Wireless communication methods and devices, and storage medium

Abstract

Provided in the present application are wireless communication methods and devices, and a storage medium. A wireless communication method comprises: a terminal device receiving first configuration information, wherein the first configuration information is used for configuring a first reference signal; on the basis of the first reference signal, the terminal device performing channel measurement to obtain first channel information; the terminal device determining a channel power on the basis of the first channel information and a first coefficient, and determining a first interference power on the basis of the first channel information and a second coefficient; and on the basis of at least the channel power and the first interference power, the terminal device determining first channel state information (CSI).

Description

A wireless communication method and device, and a storage medium Technical Field

[0001] This application relates to the field of mobile communication technology, specifically to a wireless communication method and device, and a storage medium. Background Technology

[0002] To reduce the overhead of the demodulation reference signal (DMRS) and increase the transmission rate, a method of superimposing the DMRS and data for transmission can be considered. In this method, the DMRS and data can occupy the same physical resources and be superimposed for transmission using a certain transmission power ratio, thus eliminating the need for dedicated resources to transmit the DMRS and significantly reducing resource overhead.

[0003] Summary of the Invention

[0004] This application provides a wireless communication method, device, and storage medium.

[0005] The wireless communication method provided in this application includes:

[0006] The terminal device receives first configuration information, which is used to configure a first reference signal;

[0007] The terminal device performs channel measurement based on the first reference signal to obtain first channel information;

[0008] The terminal device determines the channel power based on the first channel information and the first coefficient, and determines the first interference power based on the first channel information and the second coefficient.

[0009] The terminal device determines the first channel state information (CSI) based at least on the channel power and the first interference power.

[0010] The wireless communication method provided in this application includes:

[0011] The network device sends first configuration information, which is used to configure a first reference signal. The first reference signal is used by the terminal device to perform channel measurement to obtain first channel information.

[0012] The network device receives first channel state information (CSI), which is determined at least based on channel power and first interference power. The channel power is determined based on the first channel information and a first coefficient, and the first interference power is determined based on the first channel information and a second coefficient.

[0013] The terminal device provided in this application embodiment includes:

[0014] A first communication unit is configured to receive first configuration information, wherein the first configuration information is used to configure a first reference signal;

[0015] The first measurement unit is configured to perform channel measurement based on the first reference signal to obtain first channel information;

[0016] The first determining unit is configured to determine the channel power based on the first channel information and the first coefficient, and to determine the first interference power based on the first channel information and the second coefficient.

[0017] The second determining unit is configured to determine the first channel state information (CSI) based at least on the channel power and the first interference power.

[0018] The network device provided in this application embodiment includes:

[0019] The second communication unit is configured to send first configuration information, the first configuration information being used to configure a first reference signal, the first reference signal being used by the terminal device to perform channel measurement to obtain first channel information;

[0020] The second communication unit is further configured to receive first channel state information (CSI), the first CSI being determined at least based on channel power and first interference power, the channel power being determined based on the first channel information and a first coefficient, and the first interference power being based on the first channel information and a second coefficient.

[0021] The communication device provided in this application embodiment can be a terminal device or a network device as described above. The communication device includes a transceiver, a processor, and a memory. The memory stores a computer program, and the processor calls and runs the computer program stored in the memory to cooperate with the transceiver in executing the aforementioned wireless communication method.

[0022] The chip provided in this application embodiment is used to implement the above-described wireless communication method.

[0023] Specifically, the chip includes a processor for calling and running a computer program from a memory, causing a device equipped with the chip to perform the aforementioned wireless communication method.

[0024] The computer-readable storage medium provided in this application embodiment is used to store a computer program that causes a computer to execute the above-described wireless communication method.

[0025] The computer program product provided in this application includes computer program instructions that cause a computer to execute the above-described wireless communication method.

[0026] The computer program provided in this application embodiment, when run on a computer, causes the computer to execute the above-described wireless communication method.

[0027] Through the above technical solution, the terminal device performs channel measurement based on the first reference signal, determines the channel power and the first interference power under the assumption of superimposed transmission of reference signal and data based on the measurement results, and determines the channel state information under the assumption of superimposed transmission of reference signal and data through the channel power and the first interference power, thereby ensuring the transmission performance under the DMRS and data superimposed transmission conditions. Attached Figure Description

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 is a schematic diagram of an application scenario of an embodiment of this application;

[0030] Figure 2 is a schematic diagram of the CSI reporting method provided in an embodiment of this application;

[0031] Figure 3 is a schematic diagram of optional land resources for DMRS and uplink data overlay transmission provided in an embodiment of this application;

[0032] Figure 4 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0033] Figure 5 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0034] Figure 6 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0035] Figure 7 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0036] Figure 8 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0037] Figure 9 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0038] Figure 10 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0039] Figure 11 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0040] Figure 12 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0041] Figure 13 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0042] Figure 14 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0043] Figure 15 is a schematic diagram of an optional structure of a terminal device provided in an embodiment of this application;

[0044] Figure 16 is a schematic diagram of an optional network device structure provided in an embodiment of this application;

[0045] Figure 17 is a schematic structural diagram of a communication device provided in an embodiment of this application;

[0046] Figure 18 is a schematic structural diagram of a chip according to an embodiment of this application;

[0047] Figure 19 is a schematic block diagram of a communication system provided in an embodiment of this application. Detailed Implementation

[0048] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0049] Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. As shown in Figure 1, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 via an air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120.

[0050] It should be understood that the embodiments of this application are only illustrated by way of example with communication system 100, but the embodiments of this application are not limited thereto. That is to say, the technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems, etc.

[0051] In the communication system 100 shown in Figure 1, network device 120 may be an access network device that communicates with terminal device 110. The access network device can provide communication coverage for a specific geographical area and can communicate with terminal device 110 (e.g., UE) located within that coverage area.

[0052] Terminal device 110 can be any terminal device, including but not limited to terminal devices that are connected to network device 120 or other terminal devices via wired or wireless connections.

[0053] Terminal device 110 can be used for device-to-device (D2D) communication.

[0054] The various functional units in the communication system 100 can also establish connections and communicate with each other through the next generation (NG) interface.

[0055] Figure 1 exemplarily illustrates a base station, a core network device, and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices, and each base station may include other numbers of terminal devices within its coverage area. This application embodiment does not limit this.

[0056] It should be noted that Figure 1 is merely an example illustrating the system to which this application applies. Of course, the method shown in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably in this document.

[0057] To facilitate understanding of the technical solutions of the embodiments of this application, the relevant technologies of the embodiments of this application are described below. The following relevant technologies are optional solutions and can be combined with the technical solutions of the embodiments of this application in any way, and they all fall within the protection scope of the embodiments of this application.

[0058] Downlink CSI Feedback

[0059] To enable network devices to perform reasonable scheduling, terminal devices need to report downlink CSI (Channel State Information) so that the base station can determine the terminal device's scheduling information, such as the transmission layer number, precoding matrix, transmit beam, and modulation / coding scheme. Specifically, the terminal's CSI reporting is based on the CSI reporting configuration indicated by the network device and the Channel State Information-Reference Signal (CSI-RS) signal sent by the network device. The uplink resources used by the terminal device for CSI reporting and the CSI-RS signal used for CSI measurement are both indicated by the CSI reporting configuration. Each CSI reporting configuration corresponds to one CSI report, and each CSI report can contain different information such as CSI-RS resource indicator (CRI), Rank Indicator (RI), Precoding Matrix Indication (PMI), and Channel Quality Indicator (CQI). This information is obtained based on the CSI-RS signal configured and sent by the network device. Specifically, the content / information included in the CSI is determined by the report quantity information in the CSI reporting configuration. The report quantity information can indicate one of the following report quantities:

[0060] CRI is used to determine the CSI-RS resource currently used for channel measurements and the IMR currently used for interference measurements from multiple CSI-RS resources;

[0061] RI is used to report the recommended transport layer number;

[0062] PMI is used to determine the recommended precoding matrix from a predefined codebook;

[0063] CQI is used to report the current channel quality;

[0064] Reference Signal Receiving Power (RSRP) is used to report the RSRP of the Synchronization Signal Block (SSB) or CSI-RS corresponding to the fed-back index, so that the network side can determine the beam used for downlink transmission.

[0065] Layer Indicator (LI) is used to report the index of the transport layer associated with PTRS.

[0066] RI, PMI, or CQI can be determined based on the Signal-to-Interference-Noise Ratio (SINR) estimated by the terminal device. The channel portion of SINR is determined based on a non-zero power CSI-RS configured by the network for channel measurement, while the interference portion is determined based on a CSI-IM or non-zero power CSI-RS configured by the network for interference measurement. The CSI-RS resource for channel measurement can contain multiple antenna ports for measuring the complete downlink channel to calculate CSI. Each port of the CSI-RS resource for interference measurement corresponds to a transmission layer of interference, allowing the terminal device to measure the interference from different transmission layers of different UEs.

[0067] The terminal can report CSI in three periodic ways, as shown in Figure 2: periodic CSI, semi-persistent CSI, and aperiodic CSI.

[0068] The periodic CSI shown in 201 is transmitted on the Physical Uplink Control Channel (PUCCH). Its CSI reporting configuration is configured by Radio Resource Control (RRC) signaling. After receiving the corresponding RRC configuration, the terminal device periodically reports the CSI.

[0069] The semi-persistent CSI shown in 202 or 203 can be transmitted on the PUCCH or the Physical Uplink Shared Channel (PUSCH). In 202, the CSI reporting configuration corresponding to the CSI transmitted on the PUCCH is pre-configured by RRC signaling and activated or deactivated by Media Access Control (MAC) layer signaling. In 203, the CSI reporting configuration corresponding to the CSI transmitted on the PUSCH is dynamically indicated (activated or deactivated) by Downlink control information (DCI) signaling. After receiving the activation indication signaling from the network configuration, the terminal device periodically transmits CSI on the PUCCH or PUSCH until it receives the deactivation signaling and stops reporting.

[0070] The CSI reporting configuration corresponding to the non-periodic CSI reporting shown in 204 is also pre-configured via RRC signaling. Part of the configuration can be activated via MAC layer signaling, and then the CSI reporting configuration used for CSI reporting is indicated via CSI trigger signaling in the DCI. After receiving the CSI trigger signaling, the terminal reports the corresponding CSI on the scheduled PUSCH in one go according to the indicated CSI reporting configuration.

[0071] Data and DMRS overlay transmission

[0072] To reduce DMRS overhead and increase transmission rate, a method of superimposing DMRS and data transmission can be considered, as shown in Figure 3. Resource Element (RE) 301 is used for the control channel, and RE 302 is used for data and DMRS. In this method, DMRS and data occupy the same physical resources and are superimposed for transmission using a certain transmit power ratio (i.e., DMRS and data signals from the same terminal device are superimposed on the same resources; RE is the smallest resource unit used for signal transmission). At the receiving end, interference cancellation processes by an artificial intelligence (AI) receiver or a non-AI receiver reduce or eliminate mutual interference between DMRS and data, successfully detecting the data. In Figure 3, the physical resources used for data transmission can simultaneously superimpose DMRS transmission, eliminating the need for dedicated resources for DMRS transmission, significantly reducing pilot resource overhead and improving downlink spectral efficiency.

[0073] In related technologies, CSI measurements do not consider scenarios where DMRS and data are overlayed. Therefore, the estimated CSI does not account for the mutual interference between DMRS and data, leading to inaccurate CSI in such scenarios. Furthermore, for overlay transmission, given a fixed total power, network devices need to determine the power allocation ratio between DMRS and data. If the DMRS power share is too low, the channel estimation performance cannot meet the requirements for interference cancellation and demodulation, resulting in a sharp deterioration in demodulation performance. If the DMRS power share is too high, the data power loss is excessive, leading to an increase in the bit error rate. Because network devices cannot know the actual transmission quality of DMRS, they cannot set a reasonable DMRS power share to achieve optimal transmission performance.

[0074] To facilitate understanding of the technical solutions of the embodiments of this application, the technical solutions of this application are described in detail below through specific embodiments. The above-mentioned related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0075] This application provides a wireless communication method applied to a terminal device, as shown in Figure 4, including:

[0076] S401. The terminal device receives first configuration information, which is used to configure a first reference signal.

[0077] S402. The terminal device performs channel measurement based on the first reference signal to obtain first channel information;

[0078] S403. The terminal device determines the channel power based on the first channel information and the first coefficient, and determines the first interference power based on the first channel information and the second coefficient.

[0079] S404. The terminal device determines the first channel state information (CSI) based at least on the channel power and the first interference power.

[0080] This application provides a wireless communication method applied to a network device, as shown in Figure 5, including:

[0081] S501. The network device sends first configuration information, which is used to configure a first reference signal. The first reference signal is used by the terminal device to perform channel measurement to obtain first channel information.

[0082] S502, the network device receives first channel state information (CSI), the first CSI being determined at least based on channel power and first interference power, the channel power being determined based on the first channel information and a first coefficient, and the first interference power being based on the first channel information and a second coefficient.

[0083] This application provides a wireless communication method applied to a wireless communication system including terminal devices and network devices, as shown in FIG6, including:

[0084] S601. The network device sends first configuration information to the terminal device, the first configuration information being used to configure the first reference signal;

[0085] S602. The terminal device performs channel measurement based on the first reference signal to obtain first channel information;

[0086] S603. The terminal device determines the channel power based on the first channel information and the first coefficient, and determines the first interference power based on the first channel information and the second coefficient.

[0087] S604. The terminal device determines the first channel state information (CSI) based at least on the channel power and the first interference power.

[0088] S605, The terminal device reports the first CSI to the network device.

[0089] The wireless communication methods shown in Figure 4, Figure 5, or Figure 6 will be described below.

[0090] Understandably, the network device sends first configuration information to the terminal device. The first configuration information is used to configure the first reference signal or to indicate the configuration information of the first reference signal, so that the terminal device performs channel measurement based on the first reference signal and obtains the first channel information.

[0091] In this embodiment of the application, the first reference signal may be a downlink reference signal.

[0092] After determining the first channel information, the terminal device determines the channel power based on the first channel information and the first coefficient, and then determines the channel power based on the first channel information and the second coefficient.

[0093] The first coefficient can be understood as the power ratio of the signal portion under the DMRS and data superimposed transmission assumption. Therefore, the first coefficient and the first channel information can determine the power of the signal portion, i.e., the channel power. The second coefficient can be understood as the power ratio of the interference portion under the DMRS and data superimposed transmission assumption. Therefore, the second coefficient and the first channel information can determine the power of the interference portion, i.e., the first interference power.

[0094] Under the assumption of DMRS and data superimposed transmission, depending on the type of CSI to be measured, it can be assumed that DMRS is a signal and data is interference, or it can be assumed that data is a signal and DMRS is interference.

[0095] Understandably, the assumption of DMRS and data overlay transmission is a hypothetical scenario of DMRS and data overlay transmission.

[0096] When the terminal device determines the channel power and the first interference power, it determines the CSI under the assumption of DMRS and data superposition transmission, i.e., the first CSI, based on the channel power and the first interference power.

[0097] In this embodiment of the application, the terminal device may determine the first CSI based at least on the channel power and the first interference power.

[0098] After determining the first CSI, the terminal device reports the first CSI to the network device. Upon receiving the first CSI reported by the terminal device, the network device configures the scheduling information under the DMRS and data overlay transmission assumption based on the first CSI, thereby ensuring the transmission performance under the DMRS and data overlay transmission scenario.

[0099] In this embodiment, the method shown in Figures 3, 4, or 5 can determine the first CSI corresponding to at least one port. The terminal device can determine the first CSI corresponding to each port or port set among multiple ports and report the first CSI corresponding to each port or port set to the network device. The terminal device can also determine the first CSI corresponding to a specific port among multiple ports and report the first CSI corresponding to the specified port to the network device. The determination method for the corresponding first CSI is the same and independent for different ports or port sets. Here, the port can be a DMRS port or a CSI-RS port.

[0100] In the wireless communication method provided in this application embodiment, the terminal device performs channel measurement based on a first reference signal, determines the channel power and first interference power under the assumption of superimposed transmission of reference signal and data based on the measurement results, and determines the channel state information under the assumption of superimposed transmission of reference signal and data through the channel power and first interference power, thereby ensuring the transmission performance under the DMRS and superimposed transmission conditions.

[0101] In some embodiments, the wireless communication method shown in FIG4, as shown in FIG7, may further include:

[0102] S701. The terminal device receives second configuration information, which is used to indicate the first coefficient and / or the second coefficient, and / or the second configuration information is used to indicate a plurality of first coefficient groups, which include the first coefficient and / or the second coefficient.

[0103] In this embodiment of the application, the execution of S401 can be performed before S402.

[0104] In some embodiments, the wireless communication method shown in FIG5, as shown in FIG8, may further include:

[0105] S801. The network device sends second configuration information, which is used to indicate the first coefficient and / or the second coefficient, and / or the second configuration information is used to indicate a plurality of first coefficient groups, which include the first coefficient and / or the second coefficient.

[0106] In this embodiment, S801 can be executed before S502.

[0107] In this embodiment of the application, the first configuration information and the second configuration information can be transmitted through the same signaling or through different signaling.

[0108] The second configuration information configured in the network device can be used to indicate a first coefficient and / or a second coefficient, i.e., a first coefficient group. The second configuration information can also be used to indicate multiple first coefficient groups, where each first coefficient group includes a first coefficient and / or a second coefficient. Understandably, the second configuration information can be used to indicate one or more first coefficient groups. The terminal device determines one or more second coefficient groups based on the second configuration information, wherein each second coefficient group includes a first coefficient and a second coefficient. In one embodiment, the multiple first coefficient groups are used to indicate the first coefficient and / or candidate values ​​of the first coefficient, wherein each first coefficient group corresponds to a set of candidate values.

[0109] In this embodiment of the application, if the second configuration information indicates one of the first coefficient and the second coefficient, the other coefficient can be determined based on the coefficient indicated by the second configuration information, or it can be pre-agreed upon by the terminal device and the network device.

[0110] In some embodiments, the first coefficient is indicated by the second configuration information, and the second coefficient is determined based on the first coefficient; or, the second coefficient is indicated by the second configuration information, and the first coefficient is determined based on the second coefficient; or, the first coefficient and the second coefficient are indicated by the second configuration information; or, the second coefficient is indicated by the second configuration information, and the first coefficient is a fixed value.

[0111] Understandably, if the second configuration information indicates a first coefficient, then the other coefficient corresponding to that first coefficient, i.e., the second coefficient, is determined by the first coefficient indicated by the second configuration information. In one example, if the network device indicates the first coefficient as k1 through the second configuration information, then the second coefficient can be k2 = 1 - k1.

[0112] Understandably, if the second configuration information indicates a second coefficient, then the other coefficient corresponding to that second coefficient, i.e., the first coefficient, is determined by the first coefficient indicated by the second configuration information, or is a fixed value. In one example, if the network device indicates the second coefficient as k2 through the second configuration information, then the first coefficient can be k1 = 1 - k2. In another example, if the network device indicates the second coefficient as k2 through the second configuration information, then the first coefficient is 1.

[0113] Understandably, the second configuration information indicates a first coefficient and a second coefficient. In one example, the network device indicates that the first coefficient is k1 and the second coefficient is k2 through the second configuration information.

[0114] Understandably, if the second configuration information indicates multiple first coefficients, then the other coefficient corresponding to each first coefficient, i.e., the second coefficient, is determined by the corresponding first coefficient. In one example, the network device indicates the following first coefficients through the second configuration information: {k 11 k 12 k 13 k 14 k 15}, then the corresponding second coefficient includes: {1-k 11 1-k 12 1-k 13 1-k 14 1-k 15}

[0115] Understandably, if the second configuration information indicates multiple second coefficients, then the other coefficient corresponding to each second coefficient, i.e., the first coefficient, is determined by the corresponding second coefficient, or is a fixed value. In one example, the network device indicates the following second coefficients through the second configuration information: {k 21 k 22 k 23 k 24 k 25}, then it includes the following first coefficient: {1-k 21 1-k 22 1-k 23 1-k 24 1-k 25}

[0116] In one example, the network device indicates the following second coefficient via second configuration information: {k 21 k 22 k 23 k 24 k 25 If}, then the first coefficient corresponding to each second coefficient takes a fixed value k.

[0117] Understandably, the second configuration information indicates multiple corresponding first and second coefficients.

[0118] In one example, the network device indicates the following first coefficient combination via second configuration information: {1,0.5}{1,1}{0.2,0.8}{0.4,0.6}{0.05,0.95}{0.5,0.5}.

[0119] In this embodiment of the application, the second configuration information can be transmitted via higher-layer signaling.

[0120] Understandably, one or more second coefficient sets may also be pre-agreed upon by the terminal device and the network device. In this case, the network device does not need to configure the second configuration information.

[0121] In this embodiment, the terminal device can determine one or more power groups based on one or more second coefficient groups. A second coefficient group includes a first coefficient and a second coefficient, and a power group includes a channel power and a first interference power. One second coefficient group is used to determine one power group. When the terminal device determines a power group based on a second coefficient group, it determines a first CSI based on that power group. When the terminal device determines multiple power groups based on multiple second coefficient groups, each second coefficient group can serve as a candidate coefficient group to obtain a corresponding power group, and multiple power groups correspond to multiple candidate first CSIs. The terminal device selects one of the multiple candidate CSIs as the first CSI.

[0122] In some embodiments, the first coefficient is 1, and the second coefficient is greater than 0 and less than 1; or, the first coefficient is greater than 0, the second coefficient is greater than 0, and the sum of the first coefficient and the second coefficient is 1.

[0123] In this embodiment, the limitation of the values ​​of the first coefficient and the second coefficient can be applied to the case where the network device and the terminal device agree on the first coefficient and the second coefficient, or it can be applied to the case where the second configuration information indicates the first coefficient and / or the second coefficient.

[0124] In cases where the second configuration information indicates the first coefficient and / or the second coefficient, if the second coefficient is indicated by the second configuration information and the first coefficient is a fixed value, then the first coefficient is 1, and the second coefficient is greater than 0 and less than 1; if the first coefficient is indicated by the second configuration information and the second coefficient is determined by the first coefficient, or the second coefficient is indicated by the second configuration information and the first coefficient is determined by the first coefficient, or the first coefficient and the second coefficient are indicated by the second configuration information, then the first coefficient is greater than 0, the second coefficient is greater than 0, and the sum of the first coefficient and the second coefficient is 1.

[0125] In some embodiments, the wireless communication method shown in FIG4, as shown in FIG9, may further include:

[0126] S901, The terminal device performs channel measurement based on the second reference signal to obtain the second interference power, and the second interference power is used to determine the first CSI together with the channel power and the first interference power.

[0127] In this embodiment, S901 is executed before S404, and when the terminal device executes S901, S404 can be replaced by: the terminal device determining the first CSI based at least on the channel power, the first interference power and the second interference power.

[0128] In some embodiments, for the first CSI received by the network device in the wireless communication method shown in FIG5, the first CSI is determined at least based on the channel power, the first interference power, and the second interference power, wherein the second interference power is obtained by the terminal device performing channel measurement on the signal under the second reference.

[0129] The second reference signal is a different reference signal from the first reference signal. The terminal device performs channel measurement based on the second reference signal to obtain the second interference power. The second interference power can characterize the interference from other data transmission layers of the terminal device, or the interference from multiplexed users in other cells that occupy the same resources.

[0130] In this embodiment, the network device sends third configuration information to the terminal device. This third configuration information is used to configure the second reference signal or to indicate the configuration information of the second reference signal. The terminal device receives or transmits the second reference signal based on the third configuration information. The second reference signal is used by the terminal device to measure the second interference power. Further, the terminal device calculates a first CSI based on the channel power, the first interference power, and the second interference power. Typically, the second reference signal is a non-zero power CSI-RS signal.

[0131] In some embodiments, the wireless communication method shown in FIG4 may further include:

[0132] The terminal device performs measurements based on the first resource to obtain a third interference power. The third interference power is used at least to determine the first CSI along with the channel power and the first interference power. The first resource is used to measure interference from cells other than the serving cell.

[0133] The third interference power characterizes interference from cells outside the serving cell. Typically, the first resource is the interference measurement resource.

[0134] When the third interference power is measured, the first CSI is determined based at least on the channel power, the first interference power, and the third interference power.

[0135] In this embodiment of the application, the method for determining the first CSI includes one of the following:

[0136] Method 1: Determined based on channel power and first interference power;

[0137] Method 2: Determined based on channel power, first interference power, and second interference power;

[0138] Method 3: Determined based on channel power, first interference power, and third interference power;

[0139] Method 4: Determined based on channel power, first interference power, second interference power, and third interference power.

[0140] In some embodiments, the first CSI includes one or more of the following:

[0141] Information 1: The quantized value of the first signal-to-interference-plus-noise ratio (SINR), wherein the first SINR is the SINR based on the assumption of superimposed transmission of the demodulation reference signal (DMRS) and data;

[0142] Information 2, a suggested DMRS power ratio or data power ratio, wherein the DMRS power ratio is the power percentage of DMRS on the second resource, and the data power ratio is the power percentage of data on the second resource, wherein the second resource is a resource for DMRS and data overlay transmission;

[0143] Information 3: Second channel information based on the assumption of DMRS and data superposition transmission.

[0144] For information 1, it is the quantized value of SINR under the assumption of DMRS and data overlay transmission. The terminal device can report one or more first SINRs. If the terminal device reports multiple first SINRs, different first SINRs correspond to different second coefficient groups.

[0145] In the embodiments of this application, the first SINR can be the SINR of DMRS under the assumption of DMRS and data superimposed transmission, or it can be the SINR of data under the assumption of DMRS and data superimposed transmission.

[0146] If the terminal device calculates the first SINR based on a set of second coefficients, it obtains one first SINR. If the terminal device calculates the first SINR based on multiple sets of second coefficients, it obtains multiple first SINRs.

[0147] When a terminal device reports multiple quantized values ​​of the first SINR, it can report the quantized values ​​of the multiple first SINRs themselves, or it can report the difference between the quantized values ​​of the first SINRs, i.e., it reports using a differential method.

[0148] After receiving the quantized value of the first SINR reported by the terminal device, the network device can determine the DMRS power ratio or data power ratio under the assumption of DMRS and data superimposed transmission based on the quantized value of the first SINR reported by the terminal device. The DMRS power ratio is the power proportion of DMRS on the resource (i.e., the second resource) for DMRS and data superimposed transmission, and the data power ratio is the power proportion of data on the second resource. Based on the determined DMRS power ratio or data power ratio under the assumption of DMRS and data superimposed transmission, the network device controls the power ratio of DMRS or data when DMRS and data are superimposed, thereby controlling the downlink transmission.

[0149] If a terminal device reports a quantized value of a first SINR, the network device can determine the DMRS power ratio or data power ratio based on that quantized value. If a terminal device reports multiple quantized values ​​of a first SINR, the network device can select an appropriate DMRS power ratio or data power ratio from among the multiple quantized values ​​of the first SINR.

[0150] For information 2, the terminal device reports a suggested or recommended DMRS power ratio or data power ratio to the network device under the assumption of DMRS and data overlay transmission. The network device can control the power ratio of DMRS or data during DMRS and data overlay transmission based on the received suggested DMRS power ratio or data power ratio, thereby controlling the downlink transmission.

[0151] Information 3 can be understood as channel information under the assumption of DMRS and data superposition transmission reported by the terminal device to the network device. The information included in this channel information can be the same type as CSI in related technologies, enabling the network device to control the downlink transmission rate based on the second channel information.

[0152] In some embodiments, the second channel information includes one or more of the following: rank indicator RI, precoder matrix indicator PMI, and channel quality information CQI.

[0153] In this embodiment of the application, the first CSI reported by the terminal device to the network device includes one or more of information 1 to information 3.

[0154] In one example, the first CSI includes information 1.

[0155] In one example, the first CSI includes information 2.

[0156] In one example, the first CSI includes information 1 and information 3.

[0157] In one example, the first CSI includes information 2 and information 3.

[0158] In one example, the first CSI includes information 1, information 2, and information 3.

[0159] Optionally, the first CSI may include one of information 1 and information 2.

[0160] In some embodiments, if the first CSI includes a quantized value of the first SINR, and / or the proposed DMRS power ratio, the first coefficient is the DMRS power ratio and the second coefficient is the data power ratio. Here, the first SINR is the SINR on the DMRS.

[0161] If the first CSI includes the quantized value of the SINR on the DMRS or the proposed DMRS power ratio, then the first coefficient for determining the signal power can be the DMRS power ratio, and the second coefficient for determining the first interference power can be the data power ratio. Here, the signal power calculated based on the first coefficient is the DMRS power, and the first interference power calculated based on the second coefficient is the data power.

[0162] Understandably, the first coefficient is the DMRS power ratio, and the second coefficient is the data power ratio. The signal power determined based on the first coefficient is the power of the DMRS under the assumption of superimposed transmission of DMRS and data, and the first interference power determined based on the second coefficient is the power of the data under the assumption of superimposed transmission of DMRS and data. That is, the DMRS is regarded as the signal part, and the data is regarded as the interference part.

[0163] In some embodiments, if the first CSI includes a quantized value of the first SINR, and / or the proposed data power ratio, and / or the second channel information, the first coefficient is the data power ratio, and the second coefficient is the DMRS power ratio. Here, the first SINR is the SINR on the data.

[0164] If the first CSI includes one or more of the quantized value of SINR on the data, the suggested data power ratio, and the second channel information, then the first coefficient for determining the signal power is the data power ratio, and the second coefficient for determining the first interference power is the DMRS power ratio. Here, the signal power calculated based on the first coefficient is the data power, and the first interference power calculated based on the second coefficient is the DMRS power.

[0165] Understandably, the first coefficient is the data power ratio, and the second coefficient is the DMRS power ratio. Therefore, the signal power determined based on the first coefficient is the power of the data under the assumption of superimposed transmission of DMRS and data, and the first interference power determined based on the second coefficient is the power of DMRS under the assumption of superimposed transmission of DMRS and data. That is, the data is regarded as the signal part, and the DMRS is regarded as the interference part.

[0166] In some embodiments, if the first CSI includes a quantized value of the first SINR, the terminal device determines the first CSI based at least on the channel power and the first interference power, including:

[0167] The terminal device uses the channel power as a signal and at least the first interference power as interference to determine the first SINR; the terminal device determines the quantized value of the first SINR.

[0168] In this embodiment of the application, the determination method of the first CSI includes one of determination method 1 to determination method 4. The first CSI includes the quantized value of the first SINR. The determination method of the first SINR includes one of determination method 1 to determination method 4. After the terminal device determines the first SINR, it quantizes the first SINR to obtain the quantized value of the first SINR.

[0169] If the first SINR is determined using determination method 1, the first SINR can be expressed as: Wherein, P0 is the channel power, P1 is the first interference power, and P N To estimate the noise power.

[0170] If the first SINR is determined using determination method 2, the first SINR can be expressed as: Wherein, P2 is the second interference power.

[0171] If the first SINR is determined using determination method 3, the first SINR can be expressed as: P3 represents the third interference power.

[0172] If the first SINR is determined using determination method 4, the first SINR can be expressed as:

[0173] Understandably, if the first coefficient is the DMRS power ratio and the second coefficient is the data power ratio, P0 is the DMRS power calculated based on the first coefficient, and P1 is the data power calculated based on the second coefficient, then the first SINR is the SINR on the DMRS. If the first coefficient is the data power ratio and the second coefficient is the DMRS power ratio, P0 is the data power calculated based on the first coefficient, and P1 is the DMRS power calculated based on the second coefficient, then the first SINR is the SINR on the data.

[0174] In this embodiment, the terminal device reports the first SINR information on the DMRS port based on the power ratio indicated by the first coefficient and the second coefficient, so that the network device can determine a reasonable power ratio for downlink superimposed transmission based on the reported first SINR information.

[0175] In some embodiments, if the first CSI includes the second channel information, the terminal device determines the second channel information based at least on the channel power and the first interference power.

[0176] The terminal device can calculate the corresponding second channel information based on the channel power and the measured interference power, and report it to the network device. The measured interference power may include not only the first interference power, but also the second interference power and / or the third interference power. After determining the second channel information, the terminal device reports it to the network device.

[0177] In this embodiment, the network device can determine downlink scheduling information, such as precoding matrix, transmission layer number, MCS, etc., based on the second channel information reported by the terminal device, thereby controlling downlink transmission and improving downlink transmission rate.

[0178] In some embodiments, if the first CSI includes the proposed DMRS power ratio or data power ratio and the second channel information, the terminal device determines the first CSI based at least on the channel power and the first interference power, including:

[0179] The terminal device determines the second channel information based on the proposed DMRS power ratio or data power ratio.

[0180] If the terminal device determines a proposed DMRS power ratio or data power ratio based at least on the channel power and the first interference power, it can determine the second channel information based on the proposed DMRS power ratio or data power ratio.

[0181] Optionally, the terminal device determines the second channel information based on the proposed DMRS power ratio, including:

[0182] The terminal device uses the suggested DMRS power ratio as the second coefficient and the data power ratio determined based on the suggested DMRS power ratio as the first coefficient to calculate the new first interference power and the new channel power, thereby obtaining the second channel information.

[0183] Optionally, the terminal device determines the second channel information based on the proposed data power ratio, including:

[0184] The terminal device uses the suggested data power ratio as the first coefficient and the DMRS data power ratio determined based on the suggested data power ratio as the second coefficient to calculate the new first interference power and the new channel power, thereby obtaining the second channel information.

[0185] In this embodiment of the application, the sum of DMRS power and data power is constant, that is, the sum of data power ratio and DMRS power ratio is constant. Therefore, one can be determined by the data power ratio and DMRS power.

[0186] In this embodiment, after determining the suggested DMRS power ratio or data power ratio and the second channel information, the terminal device reports the suggested DMRS power ratio or data power ratio and the second channel information to the network device. On one hand, the terminal device reports the second channel information based on the superimposed transmission assumption and a certain power allocation ratio assumption, so that the network device can obtain an accurate CSI for downlink transmission when adopting the appropriate power allocation, thereby improving the downlink transmission rate. On the other hand, since the terminal device can simultaneously report the recommended power ratio and the corresponding CSI, the network device can more reasonably determine the DMRS and data power ratios and use the optimal power ratio and corresponding CSI for downlink transmission.

[0187] In some embodiments, the proposed DMRS power ratio or data power ratio is one of a plurality of first power ratios, which are a plurality of first DMRS power ratios or first data power ratios indicated by the network device to the terminal device or agreed upon by the terminal device and the network device.

[0188] Understandably, the proposed DMRS power ratio is one of a plurality of first DMRS power ratios, which are indicated by the network device to the terminal device or agreed upon by the terminal device and the network device.

[0189] Understandably, the suggested data power ratio is one of a plurality of first data power ratios, which are indicated by the network device to the terminal device or agreed upon by the terminal device and the network device.

[0190] In this embodiment of the application, if the plurality of first power ratios are indicated to the terminal device by the network device, then the plurality of first power ratios are indicated by the second configuration information sent by the network device.

[0191] In some embodiments, the proposed DMRS power ratio or data power ratio is the smallest DMRS power ratio or the largest data power ratio among one or more second power ratios, wherein the one or more second power ratios are power ratios among the plurality of first power ratios that meet the target SINR requirement.

[0192] Understandably, the proposed DMRS power ratio is the smallest DMRS power ratio among one or more second DMRS power ratios. Wherein, the one or more second DMRS power ratios are DMRS power ratios among a plurality of first DMRS power ratios that satisfy the target SINR requirement.

[0193] Understandably, the proposed data power ratio is the largest of one or more second data power ratios. The one or more second data power ratios are the data power ratios that meet the target SINR requirement among a plurality of first data power ratios.

[0194] In this embodiment, the target SINR is configured by the network device for the terminal device, or determined by the terminal device based on its own capabilities. For example, the terminal device can determine a SINR threshold that meets the basic channel estimation performance requirements or demodulation requirements as the target SINR based on its own detection capabilities.

[0195] In some embodiments, if the first CSI includes the proposed DMRS power ratio or data power ratio, the terminal device determines the first CSI based at least on the channel power and the first interference power, including:

[0196] For each of the plurality of first power ratios, the terminal device obtains a second SINR corresponding to the first power ratio based at least on the channel power and the first interference power corresponding to the first power ratio, wherein the first coefficient or the second coefficient is the first power ratio;

[0197] The terminal device determines one or more second power ratios among the plurality of first power ratios that correspond to the second SINR that meet the target SINR requirement;

[0198] The terminal device uses the smallest DMRS power ratio or the largest data power ratio among the one or more of the second power ratios as the recommended DMRS power ratio or data power ratio.

[0199] Understandably, if the first CSI includes the recommended DMRS power ratio:

[0200] For each of the plurality of first DMRS power ratios, the terminal device obtains a second SINR corresponding to the first DMRS power ratio based at least on the channel power and the first interference power corresponding to the first DMRS power ratio, wherein the first coefficient or the second coefficient is the first DMRS power ratio; the terminal device determines one or more second DMRS power ratios among the plurality of first DMRS power ratios whose corresponding second SINR meets the target SINR requirement; the terminal device takes the smallest DMRS power ratio among the one or more second DMRS power ratios as the proposed DMRS power ratio.

[0201] The channel power and the first interference power corresponding to the first DMRS power ratio can be understood as the channel power and the first interference power calculated based on the first DMRS power ratio, wherein the channel power is determined based on the first DMRS power ratio (i.e., the first coefficient), and the first interference power is determined based on the data power ratio (i.e., the second coefficient) determined by the first DMRS power ratio; or, the first interference power is determined based on the first DMRS power ratio (i.e., the second coefficient), and the signal power is determined based on the data power ratio (i.e., the first coefficient) determined by the first DMRS power ratio.

[0202] Understandably, if the first CSI includes the suggested data power ratio:

[0203] For each of the plurality of first data power ratios, the terminal device obtains a second SINR corresponding to the first data power ratio based at least on the channel power and the first interference power corresponding to the first data power ratio, wherein the first coefficient or the second coefficient is the first data power ratio; the terminal device determines one or more second data power ratios among the plurality of first data power ratios whose corresponding second SINR meets the target SINR requirement; the terminal device takes the largest data power ratio among the one or more second data power ratios as the recommended data power ratio.

[0204] The channel power and the first interference power corresponding to the first data power ratio can be understood as the channel power and the first interference power calculated based on the first data power ratio, wherein the channel power is determined based on the first data power ratio (i.e., the first coefficient), and the first interference power is determined based on the DMRS power ratio (i.e., the second coefficient) determined by the first data power ratio; or, the first interference power is determined based on the first data power ratio (i.e., the second coefficient), and the signal power is determined based on the DMRS power ratio (i.e., the first coefficient) determined by the first data power ratio.

[0205] Understandably, the interference signal used to determine the second SINR may include, in addition to the first interference power, the second interference power and / or the third interference power. The method for determining the second SINR can refer to the method for determining the first SINR, and will not be repeated here.

[0206] In this embodiment, the suggested DMRS power ratio corresponds to the smallest DMRS power ratio among the DMRS power ratios where the second SINR is higher than the target SINR, and the suggested data power corresponds to the largest data power ratio among the data power ratios where the second SINR is higher than the target SINR, representing the minimum DMRS power that can meet the target SINR requirement.

[0207] In some embodiments, the first reference signal is a DMRS or a precoded Channel State Information Reference Signal (CSI-RS); the second reference signal is a DMRS or a precoded CSI-RS.

[0208] In one example, the first reference signal is DMRS, and the second reference signal is DMRS.

[0209] In one example, the first reference signal is DMRS, and the second reference signal is precoded CSI-RS.

[0210] In one example, the first reference signal is a pre-coded CSI-RS, and the second reference signal is a DMRS.

[0211] In one example, the first reference signal is a precoded CSI-RS, and the second reference signal is a precoded CSI-RS.

[0212] In some embodiments, the first reference signal and the second reference signal are DMRS on different DMRS ports, or the first reference signal and the second reference signal are CSI-RS on different CSI-RS ports.

[0213] Taking DMRS on different DMRS ports as an example, the network device can be configured with multiple DMRS ports. One DMRS port corresponds to the signal portion, used to measure channel power and the first interference signal power, while the other DMRS ports correspond to the interference portion, used to measure the second interference signal. One DMRS port corresponds to the target DMRS port of the signal, while the other DMRS ports can correspond to interference from other data transmission layers of the terminal device, or interference from other users occupying the same resources.

[0214] Taking the first reference signal and the second reference signal as CSI-RS on different CSI-RS ports as an example, the network device can configure multiple CSI-RS resources or CSI-RS ports. One CSI-RS resource or port corresponds to the signal portion, used to measure channel power and the first interference signal power. Other CSI-RS resources or ports correspond to the interference portion, used to measure the second interference signal. The terminal device obtains the channel power, the first interference power, and the second interference power by measuring different CSI-RS resources or CSI-RS ports, thereby calculating the first CSI. The other CSI-RS resources or CSI-RS ports may correspond to interference from other data transmission layers of the terminal device, or interference from other users occupying the same resources.

[0215] In some embodiments, the first channel information includes: a channel matrix, a channel covariance matrix, a channel eigenvector, or the received power of the channel.

[0216] If the first channel information includes the channel matrix, the channel power can be determined according to... The calculated first interference power can be based on The calculation yields a channel matrix H, with the first coefficient being k1 and the second coefficient being k2.

[0217] In one example, the channel power could be The first interference power can be...

[0218] If the first channel information includes the channel covariance matrix, the channel power can be calculated based on k1R, and the first interference power can be calculated based on k2R, where the channel covariance matrix is ​​R.

[0219] In one example, for a given DMRS port / transport layer, the channel power could be k1w. H Rw, the first interference power can be k2w H Rw, where w is the channel feature vector corresponding to the DMRS port / transport layer, w H This represents the conjugate transpose of w.

[0220] If the first channel information includes a channel feature vector, the channel power can be based on... The calculated first interference power can be based on Calculated.

[0221] In one example, for a given DMRS port / transport layer, the channel power could be: The first interference power can be...

[0222] If the first channel information includes the channel's received power, the channel power can be calculated based on k1P, and the first interference power can be calculated based on k2P, where P is the channel's received power.

[0223] In one example, the channel power is k1P and the first interference power is k2P.

[0224] The wireless communication method provided in this application will now be described through several embodiments.

[0225] In this embodiment of the application, for the terminal device side, as shown in Figure 10, it includes:

[0226] S1001. The terminal device performs channel measurement based on the first reference signal configured by the network device to obtain the first channel information;

[0227] S1002. The terminal device calculates the channel power based on the first channel information and the first coefficient, and calculates the first interference power based on the first channel information and the second coefficient.

[0228] S1003. The terminal device calculates and reports CSI based at least on the channel power and the first interference power.

[0229] Optionally, the first coefficient is notified to the terminal device by the network device, and the second coefficient is obtained based on the first coefficient; or, the second coefficient is notified to the terminal device by the network device, and the first coefficient is obtained based on the second coefficient; or, a combination of the first coefficient and the second coefficient is notified to the terminal device by the network device; or, the first coefficient is a fixed value, and the second coefficient is notified to the terminal device by the network device.

[0230] Optionally, the first coefficient is 1, and the second coefficient is greater than 0 and less than 1; or, the first coefficient and the second coefficient are greater than 0 and their sum is 1.

[0231] Optionally, the terminal device performs measurements based on the second reference signal to obtain the second interference power, and calculates and reports the CSI based on the channel power, the first interference power, and the second interference power.

[0232] The CSI includes at least one of the following: a quantized value of SINR, a recommended DMRS power ratio, an RI based on the superimposed transmission assumption, a PMI based on the superimposed transmission assumption, and a CQI based on the superimposed transmission assumption.

[0233] The terminal device uses the channel power as the signal component and the first interference power and the second interference power as the interference component to calculate the SINR; it then reports the quantized value of the SINR as the CSI to the network device, or it calculates the RI / PMI / CQI based on the superimposed transmission assumption according to the SINR and reports it as the CSI to the network device.

[0234] When the CSI includes a quantized value of SINR or a recommended DMRS power ratio, the first coefficient is the assumed DMRS power ratio and the second coefficient is the assumed data power ratio.

[0235] When the CSI includes RI / PMI / CQI based on the superimposed transmission assumption, the first coefficient is the assumed data power ratio and the second coefficient is the assumed DMRS power ratio.

[0236] Optionally, the recommended DMRS power ratio is one of the candidate DMRS power ratios, which is pre-instructed by the network device to the terminal device or pre-determined by the terminal device and the network device.

[0237] Optionally, the recommended DMRS power ratio is the smallest DMRS power ratio among the candidate DMRS power ratios that meets the target SINR requirement, wherein the target SINR is configured by the network device for the terminal device, or determined by the terminal device based on its own capabilities.

[0238] The calculation and reporting of CSI based on the channel power and the first interference power includes: the terminal device using the candidate DMRS power ratio as the first coefficient and the remaining power ratio as the second coefficient to calculate the channel power and the first interference power; obtaining the SINR corresponding to each candidate DMRS power ratio according to the channel power and the first interference power; and reporting the smallest DMRS power ratio that meets the target SINR requirement as the recommended DMRS power ratio to the network device.

[0239] Optionally, the DMRS power ratio is the power ratio of DMRS on the resources where DMRS and data are overlaid for transmission, and the data power ratio is the power ratio of data on the resources where DMRS and data are overlaid for transmission.

[0240] The first reference signal is DMRS or pre-coded CSI-RS; the second reference signal is DMRS or pre-coded CSI-RS.

[0241] Optionally, the first reference signal and the second reference signal are DMRS on different DMRS ports, or the first reference signal and the second reference signal are CSI-RS on different CSI-RS ports.

[0242] The first channel information is a channel matrix, or a channel covariance matrix, or a channel eigenvector, or the channel's received power.

[0243] In this embodiment of the application, for the network device side, as shown in Figure 11, it includes:

[0244] S1101. The network device indicates first configuration information, which is used to indicate the configuration of a first reference signal, and the first reference signal is used by the terminal device to measure and obtain first channel information.

[0245] S1102. The network device receives the CSI calculated and reported by the terminal device based on the first channel information, the first coefficient, and the second coefficient.

[0246] The CSI is obtained based on channel power and first interference power. The channel power is calculated based on the first channel information and a first coefficient, and the first interference power is obtained based on the first channel information and a second coefficient.

[0247] Optionally, the network device indicates second configuration information, which is used to indicate the first coefficient and / or the second coefficient, or to indicate candidate values ​​for the first coefficient and / or the second coefficient.

[0248] Optionally, the second configuration information indicates a first coefficient, and the second coefficient is obtained based on the first coefficient; or, the second configuration information indicates a second coefficient, and the first coefficient is obtained based on the second coefficient; or, the combination of the first coefficient and the second coefficient is notified to the terminal device by the network device; or, the second configuration information indicates a second coefficient, and the first coefficient is a fixed value.

[0249] Optionally, the first coefficient is 1, and the second coefficient is greater than 0 and less than 1; or, the first coefficient and the second coefficient are greater than 0 and their sum is 1.

[0250] Optionally, the network device indicates third configuration information, which is used to indicate the configuration of a second reference signal. The second reference signal is used by the terminal device to measure the second interference power and calculate the CSI based on the channel power, the first interference power, and the second interference power.

[0251] Optionally, the CSI includes at least one of the following: a quantized value of SINR, a recommended DMRS power ratio, an RI based on the superimposed transmission assumption, a PMI based on the superimposed transmission assumption, and a CQI based on the superimposed transmission assumption.

[0252] When the CSI includes a quantized value of SINR or a recommended DMRS power ratio, the first coefficient is the assumed DMRS power ratio and the second coefficient is the assumed data power ratio.

[0253] When the CSI includes RI / PMI / CQI based on the superimposed transmission assumption, the first coefficient is the assumed data power ratio and the second coefficient is the assumed DMRS power ratio.

[0254] Optionally, the recommended DMRS power ratio is one of the candidate DMRS power ratios, which is pre-instructed by the network device to the terminal device or pre-determined with the network device.

[0255] Optionally, the recommended DMRS power ratio is the smallest DMRS power ratio among the candidate DMRS power ratios that meets the target SINR requirement, wherein the target SINR is configured by the network device for the terminal device, or determined by the terminal device based on its own capabilities.

[0256] The DMRS power ratio is the power percentage of DMRS on resources where data is overlaid and transmitted, and the data power ratio is the power percentage of data on resources where data is overlaid and transmitted.

[0257] The first reference signal is DMRS or pre-coded CSI-RS; the second reference signal is DMRS or pre-coded CSI-RS.

[0258] Optionally, the first reference signal and the second reference signal are DMRS on different DMRS ports, or the first reference signal and the second reference signal are CSI-RS on different CSI-RS ports.

[0259] The first channel information is a channel matrix, or a channel covariance matrix, or a channel eigenvector, or the channel's received power.

[0260] The wireless communication methods provided in this application include, but are not limited to, the following embodiments one to three.

[0261] Example 1: Reporting of DMRS SINR Measurements

[0262] As shown in Figure 12, it includes:

[0263] S1201, The network device indicates first configuration information, which is used to indicate the configuration of the first reference signal.

[0264] The first configuration information can be reported via CSI configuration instructions to indicate the first reference signal used for the corresponding CSI measurement. The first reference signal can be used to obtain the first channel information.

[0265] The first reference signal is either a DMRS or a pre-coded CSI-RS. If the first reference signal is a DMRS, the first configuration information can indicate the corresponding DMRS port. If the first reference signal is a CSI-RS, the first configuration information can indicate the corresponding CSI-RS resource or CSI-RS port.

[0266] S1202. The terminal device performs channel measurement based on the first reference signal configured by the network device to obtain the first channel information.

[0267] The first channel information is a channel matrix, or a channel covariance matrix, or a channel eigenvector, or the channel's received power.

[0268] S1203. The terminal device calculates the channel power based on the first channel information and the first coefficient, and calculates the first interference power based on the first channel information and the second coefficient.

[0269] The measured CSI is the SINR (or its quantized value) on the DMRS port. Therefore, the first coefficient is the DMRS power ratio assumed by the terminal device, and the second coefficient is the data power ratio assumed by the terminal device.

[0270] It should be noted that the first coefficient is the DMRS power ratio assumed by the terminal device, and the second coefficient is the data power ratio assumed by the terminal device; or, the first coefficient is the data power ratio assumed by the terminal device, and the second coefficient is the DMRS power ratio assumed by the terminal device. The specific meanings of the first and second coefficients may be related to the measured CSI; when the measured CSI is the SINR (or its quantized value) on the DMRS port or the recommended DMRS power ratio, the first coefficient is the assumed DMRS power ratio, and the second coefficient is the assumed data power ratio, used to calculate the SINR on the DMRS port; when the measured CSI is the CSI corresponding to the PDSCH based on the superimposed transmission assumption (e.g., RI / PMI / CQI), the first coefficient is the assumed data power ratio, and the second coefficient is the assumed DMRS power ratio.

[0271] In one embodiment, the terminal device receives second configuration information indicated by the network device, the second configuration information being used to indicate the first coefficient and / or the second coefficient, or to indicate candidate values ​​for the first coefficient and / or the second coefficient.

[0272] The terminal device can use one of the following four methods to obtain the first coefficient and the second coefficient:

[0273] Method 1: The first coefficient is notified to the terminal device by the network device (e.g., indicated by second configuration information), and the second coefficient is obtained based on the first coefficient. In this case, both the first and second coefficients are greater than 0, and their sum is 1. For example, if the first coefficient indicated by the network device through the second configuration information is k1, then the second coefficient can be k2 = 1 - k1. The first coefficient has a value range of 0-1, and the network device can use several bits to indicate several quantized values ​​within this range; for example, the first coefficient could be {0.2, 0.4, 0.6, 0.8}.

[0274] Method 2: The second coefficient is notified to the terminal device by the network device (e.g., indicated by second configuration information), and the first coefficient is obtained based on the first coefficient. In this case, both the first and second coefficients are greater than 0, and their sum is 1. For example, if the second coefficient indicated by the network device through the second configuration information is k2, then the first coefficient can be k1 = 1 - k2. The value range of the second coefficient is 0-1, and the network device can use several bits to indicate several quantized values ​​within this range. For example, the second coefficient could be {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8}.

[0275] Method 3: The combination of the first and second coefficients is notified to the terminal device by the network device. For example, the network device can indicate one of the following combinations via higher-layer signaling: {1,0.5}{1,1}{0.2,0.8}{0.4,0.6}{0.05,0.95}{0.5,0.5}.

[0276] Method 4: The first coefficient is a fixed value, and the second coefficient is notified to the terminal device by the network device. For example, the first coefficient is 1, and the second coefficient is indicated by the network device through the second configuration information, and is a number between 0 and 1.

[0277] Terminal equipment can calculate channel power and first interference power in the following ways:

[0278] Power Calculation Method 1: Assuming the first channel information is the channel matrix H, the first coefficient is k1, and the second coefficient is k2, then the channel power can be calculated according to... The first interference power can be calculated based on H. The channel power is calculated from H. For example, the channel power can be... The first interference power can be

[0279] Power Calculation Method 2: Assuming the first channel information is the channel covariance matrix R, the first coefficient is k1, and the second coefficient is k2, then the channel power can be calculated based on k1 and R, and the first interference power can be calculated based on k2 and R. For example, for a certain DMRS port / transmission layer, the channel power can be k1w. H Rw, where the first interference power can be k2w H Rw, where w is the channel feature vector corresponding to the DMRS port / transport layer.

[0280] Power calculation method 3: Assuming the first channel information is the channel feature vector w, the first coefficient is k1, and the second coefficient is k2, then the channel power can be calculated according to... The first interference power can be calculated from w. The channel power is calculated from w. For example, for a given DMRS port / transport layer, the channel power can be... The first interference power can be Where R is the channel covariance matrix.

[0281] Power calculation method 4: Assuming the first channel information is the channel's received power P, the first coefficient is k1, and the second coefficient is k2, then the channel power can be calculated based on k1 and P, and the first interference power can be calculated based on k2 and P. For example, the channel power is k1P, and the first interference power is k2P.

[0282] S1204. The terminal device calculates and reports the quantized value of SINR based on the channel power and the first interference power.

[0283] Optionally, the terminal device receives third configuration information indicated by the network device. This third configuration information indicates the configuration of a second reference signal, which is used by the terminal device to measure a second interference power. Further, the terminal device calculates a quantized value of the SINR based on the channel power, the first interference power, and the second interference power.

[0284] The second reference signal can be DMRS or pre-coded CSI-RS.

[0285] In one implementation, the first reference signal and the second reference signal are DMRS on different DMRS ports. For example, a network device can be configured with multiple DMRS ports, one of which corresponds to the signal portion, and the other DMRS ports correspond to the interference portion. The terminal device obtains the channel power and interference power by measuring different DMRS ports, thereby calculating the CSI. One DMRS port corresponds to the target DMRS port of the signal, while the other DMRS ports may correspond to interference from other data transmission layers of the terminal device, or interference from other users occupying the same resources.

[0286] The CSI includes at least one of the following: a quantized value of SINR, a recommended DMRS power ratio, an RI based on the superimposed transmission assumption, a PMI based on the superimposed transmission assumption, and a CQI based on the superimposed transmission assumption. In this embodiment, it is assumed that the CSI includes a quantized value of SINR. Specifically, the SINR can be the SINR on the DMRS port, that is, the DMRS is the signal, and the interference received by the DMRS is the interference SINR.

[0287] Terminal devices can use the following methods to calculate the SINR and quantize and report it:

[0288] Calculation Method 1: The terminal device uses the channel power as the signal part and the first interference power as the interference part to calculate the SINR; the quantized value of the SINR is reported to the network device as the CSI.

[0289] For example, assuming the channel power is P0, the first interference power is P1, and the estimated noise power is P... N Then the SINR can be expressed as The SINR can be calculated and reported separately for each DMRS port, or the SINR can be calculated and reported only for a specific DMRS port.

[0290] Calculation Method 2: The terminal device uses the channel power as the signal part and the first interference power and the second interference power as the interference part to calculate the SINR; the quantized value of the SINR is reported to the network device as the CSI.

[0291] For example, assuming the channel power is P0, the first interference power is P1, the second interference power is P2, and the estimated noise power is P... N Then the SINR can be expressed as The SINR can be calculated and reported separately for each DMRS port, or the SINR can be calculated and reported only for a specific DMRS port.

[0292] Optionally, the network device can be configured with multiple first coefficients and / or second coefficients. The terminal device calculates and reports the corresponding SINR based on the coefficients configured by the network device, that is, it reports multiple sets of quantized SINR values ​​corresponding to the first coefficient / second coefficient. Among them, the quantized values ​​corresponding to different coefficients can be reported in a differential manner, that is, only the difference between the quantized value and the reference SINR is reported, so as to reduce the overhead of reporting signaling.

[0293] S1205. The network device receives the quantized value of SINR reported by the terminal device.

[0294] If the CSI includes a quantized value of SINR, the network device can determine the SINR on the DMRS port based on the quantized value, thereby determining the power ratio of the DMRS on the resources used for data overlay transmission. The network device can instruct the terminal device to report quantized values ​​of SINR corresponding to multiple different power ratios (i.e., different first and second coefficients), and then select a suitable power ratio based on the SINR value. For example, the minimum DMRS power ratio that meets the target SINR requirement can be used as the DMRS power ratio for overlay transmission.

[0295] In Implementation Example 1, the terminal device can report the SINR on the DMRS port based on a certain power ratio, so that the network device can determine a reasonable power ratio for downlink superposition transmission based on the reported information.

[0296] Example 2: Used for DMRS power ratio reporting

[0297] The interaction between terminal devices and network devices, as shown in Figure 13, includes:

[0298] S1301, The network device indicates first configuration information, which is used to indicate the configuration of the first reference signal.

[0299] The first configuration information can be reported via CSI configuration instructions to indicate the first reference signal used for the corresponding CSI measurement. The first reference signal can be used to obtain the first channel information.

[0300] The first reference signal is either a DMRS or a pre-coded CSI-RS. If the first reference signal is a DMRS, the first configuration information can indicate the corresponding DMRS port. If the first reference signal is a CSI-RS, the first configuration information can indicate the corresponding CSI-RS resource or CSI-RS port.

[0301] S1302. The terminal device performs channel measurement based on the first reference signal configured by the network device to obtain the first channel information.

[0302] The first channel information is a channel matrix, or a channel covariance matrix, or a channel eigenvector, or the channel's received power.

[0303] S1303. The terminal device calculates the channel power based on the first channel information and the first coefficient, and calculates the first interference power based on the first channel information and the second coefficient.

[0304] When the measured CSI is the recommended DMRS power ratio, the first coefficient is the DMRS power ratio assumed by the terminal device, and the second coefficient is the data power ratio assumed by the terminal device, which are used to calculate the SINR on the DMRS port.

[0305] In one embodiment, the terminal device receives second configuration information indicated by the network device. The second configuration information is used to indicate the first coefficient and / or the second coefficient, or to indicate candidate values ​​of the first coefficient and / or the second coefficient, that is, candidate values ​​of the DMRS power ratio and / or candidate values ​​of the data power ratio.

[0306] In this embodiment of the application, it is assumed that the sum of the DMRS power ratio and the data power ratio is 1. Therefore, the effect is the same regardless of which candidate value is indicated. The following description only takes the candidate value of the DMRS power ratio (also known as the candidate DMRS power ratio) indicated by the second configuration information of the network device as an example.

[0307] The method by which the terminal device calculates the channel power and the first interference power can be found in the description of Example 1 S1203.

[0308] S1304. The terminal device calculates and reports a recommended DMRS power ratio based on the channel power and the first interference power.

[0309] The terminal device receives third configuration information indicated by the network device. This third configuration information indicates the configuration of a second reference signal, which the terminal device uses to measure a second interference power. Further, the terminal device calculates a recommended DMRS power ratio based on the channel power, the first interference power, and the second interference power.

[0310] The second reference signal can be DMRS or pre-coded CSI-RS.

[0311] In some implementations, the first reference signal and the second reference signal are different CSI-RS resources or CSI-RS ports. For example, a network device can be configured with multiple CSI-RS resources or CSI-RS ports, where one CSI-RS resource or port corresponds to the signal portion, and the others correspond to the interference portion. The terminal device obtains the channel power and interference power by measuring different CSI-RS resources or CSI-RS ports, thereby calculating the CSI. The other CSI-RS resources or CSI-RS ports may correspond to interference from other data transmission layers of the terminal device, or interference from other users occupying the same resources.

[0312] In some implementations, the terminal device receives fourth configuration information indicated by the network device. This fourth configuration information indicates interference measurement resources, which are used by the terminal device to measure a third interference power. Further, the terminal device calculates the CSI based on the channel power, the first interference power, the second interference power, and the third interference power. The third interference power corresponds to interference outside the serving cell.

[0313] In Example 2, it is assumed that the CSI is the recommended DMRS power ratio. Specifically, the recommended DMRS power ratio is one of the candidate DMRS power ratios.

[0314] The candidate DMRS power ratio is indicated to the terminal device in advance by the network device through the second configuration information. Alternatively, the candidate DMRS power ratio can also be agreed upon in advance by the network device and the terminal device, for example, the value can be {0.05,0.1,0.2,0.3,0.4,0.5,0.6,0.7}.

[0315] The recommended DMRS power ratio is the smallest DMRS power ratio among the candidate DMRS power ratios that meets the target SINR requirement. The target SINR is configured by the network device for the terminal device, or determined by the terminal device based on its own capabilities. For example, the terminal device can determine a SINR threshold that meets basic channel estimation performance requirements or demodulation requirements as the target SINR based on its own detection capabilities.

[0316] The terminal device uses the candidate DMRS power ratio as the first coefficient and the remaining power ratio (i.e., the data power ratio) as the second coefficient to calculate the channel power and the first interference power. The specific calculation method can be found in the description of Embodiment 1. Further, the terminal device obtains the SINR corresponding to each candidate DMRS power ratio based on the channel power and the first interference power. In this step, the interference portion may include the aforementioned second interference power and / or third interference power in addition to the first interference power. The specific SINR calculation method can be found in the description of Embodiment 1. After obtaining the SINR corresponding to each candidate DMRS power ratio, the terminal device reports the smallest DMRS power ratio that meets the target SINR requirement as the recommended DMRS power ratio to the network device. That is, the recommended DMRS power ratio is the smallest power ratio among the power ratios whose corresponding SINR is higher than the target SINR, representing the lowest DMRS power that can meet the target SINR requirement.

[0317] S1305. The network device receives the recommended DMRS power ratio reported by the terminal device.

[0318] Network devices can determine the transmission power of DMRS and data on the physical resources for overlay transmission based on the DMRS power ratio reported by the terminal devices.

[0319] In Embodiment 2, the terminal device can report the recommended DMRS or data power ratio, so that the network device can reasonably allocate the power between DMRS and data, and maximize the data transmission power while ensuring channel estimation performance.

[0320] Example 3: CSI Measurement Reporting for Data

[0321] As shown in Figure 14, it includes:

[0322] S1401, The network device indicates first configuration information, which is used to indicate the configuration of the first reference signal.

[0323] The first configuration information can be reported via CSI configuration instructions to indicate the first reference signal used for the corresponding CSI measurement. The first reference signal can be used to obtain the first channel information.

[0324] The first reference signal is either a DMRS or a pre-coded CSI-RS. If the first reference signal is a DMRS, the first configuration information can indicate the corresponding DMRS port. If the first reference signal is a CSI-RS, the first configuration information can indicate the corresponding CSI-RS resource or CSI-RS port.

[0325] S1402. The terminal device performs channel measurement based on the first reference signal configured by the network device to obtain the first channel information.

[0326] The first channel information is a channel matrix, or a channel covariance matrix, or a channel eigenvector, or the channel's received power.

[0327] S1403. The terminal device calculates the channel power based on the first channel information and the first coefficient, and calculates the first interference power based on the first channel information and the second coefficient.

[0328] In this embodiment of the application, the measured CSI includes the CSI (e.g., RI / PMI / CQI) corresponding to the PDSCH based on the overlay transmission assumption. In this case, the first coefficient is the data power ratio assumed by the terminal device, and the second coefficient is the DMRS power ratio assumed by the terminal device. The DMRS power ratio is the power proportion of DMRS on the resources of the overlay data transmission, and the data power ratio is the power proportion of data on the resources of the overlay data transmission.

[0329] In one implementation, the terminal device receives second configuration information indicated by the network device. This second configuration information indicates the first coefficient and / or the second coefficient, or indicates candidate values ​​for the first coefficient and / or the second coefficient. That is, the second configuration information indicates the data power ratio and / or the data power ratio, or indicates their candidate values.

[0330] When the second configuration information indicates the data power ratio and / or data power ratio used for CSI measurement, the terminal device can calculate and report the CSI based on the configured ratio; when the second configuration information indicates candidate values ​​for the data power ratio and / or data power ratio, the terminal device can select the recommended data power ratio and / or data power ratio from them, calculate the corresponding CSI, and then report the recommended power ratio and the corresponding CSI together to the network device.

[0331] The method by which the terminal device obtains the first coefficient and the second coefficient, as well as the method for calculating the channel power and the first interference power, can be referred to the description in Embodiment 1.

[0332] S1404. The terminal device calculates and reports the CSI corresponding to the PDSCH based on the superimposed transmission assumption of the channel power and the first interference power.

[0333] Optionally, the terminal device can perform interference measurement based on the second reference signal and / or interference measurement resources configured in the network device to obtain a second interference power and / or a third interference power, which, together with the first interference power, are used as the interference component to calculate SINR / CSI. The method for the terminal device to calculate SINR can be found in the description in Embodiment 1.

[0334] In one scenario, the CSI includes at least one of the following: a recommended DMRS power ratio, an RI based on the superimposed transmission assumption, a PMI based on the superimposed transmission assumption, and a CQI based on the superimposed transmission assumption. The recommended DMRS power ratio can also be replaced by a recommended data power ratio, since the sum of the two, i.e., the total power assumption, is constant, and reporting either power ratio by the terminal has the same effect. The CSI includes the RI, PMI, and CQI based on the superimposed transmission assumption. That is, the terminal device can calculate the corresponding RI / PMI / CQI based on the channel power and the measured interference power and report it to the network device.

[0335] In one case, the CSI includes the recommended DMRS power ratio, the RI based on the superimposed transmission assumption, the PMI based on the superimposed transmission assumption, and the CQI based on the superimposed transmission assumption.

[0336] The recommended DMRS power ratio (as mentioned above, it can also be a data power ratio) is one of the candidate DMRS power ratios. The candidate DMRS power ratios are pre-indicated to the terminal device by the network device through second configuration information; alternatively, the candidate DMRS power ratios can be pre-agreed upon by the network device and the terminal device. One implementation of determining the recommended DMRS power ratio can be found in the description of Embodiment 2.

[0337] After determining the recommended DMRS power ratio, the terminal device can calculate the corresponding CSI (such as RI / PMI / CQI) based on the recommended DMRS power ratio, and report the recommended DMRS power ratio and the corresponding CSI to the network device. For example, the terminal device uses the DMRS power ratio as a second coefficient and the data power ratio (i.e., 1 minus the DMRS power ratio) as a first coefficient to calculate the interference power and channel power respectively, thereby measuring RI / PMI / CQI.

[0338] S1405. Network devices receive CSI reports from terminal devices.

[0339] Network devices can determine the transmission power of DMRS and data on the physical resources for overlay transmission based on the DMRS power ratio reported by the terminal devices. Simultaneously, network devices can also determine downlink scheduling information, such as the precoding matrix, transport layer number, and MCS, based on the RI / PMI / CQI reported by the terminal devices.

[0340] In Example 2, the terminal device can report the CSI based on the superimposed transmission assumption and a certain power allocation ratio assumption. This allows the network device to obtain an accurate CSI for downlink transmission when using appropriate power allocation, thereby improving the downlink transmission rate. Furthermore, since the terminal device can simultaneously report the recommended power ratio and the corresponding CSI, the network device can more rationally determine the power ratio between DMRS and data, and use the optimal power ratio and corresponding CSI for downlink transmission.

[0341] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0342] Figure 15 is a schematic diagram of the structural composition of the terminal device provided in an embodiment of this application. As shown in Figure 15, the terminal device 1500 includes:

[0343] The first communication unit 1501 is configured to receive first configuration information, the first configuration information being used to configure a first reference signal;

[0344] The first measurement unit 1502 is configured to perform channel measurement based on the first reference signal to obtain first channel information;

[0345] The first determining unit 1503 is configured to determine the channel power based on the first channel information and the first coefficient, and to determine the first interference power based on the first channel information and the second coefficient.

[0346] The second determining unit 1504 is configured to determine the first channel state information (CSI) based at least on the channel power and the first interference power.

[0347] In some embodiments, the first communication unit 1501 is further configured to receive second configuration information, the second configuration information being used to indicate the first coefficient and / or the second coefficient, and / or, the second configuration information being used to indicate a plurality of first coefficient groups, the first coefficient groups including the first coefficient and / or the second coefficient.

[0348] In some embodiments,

[0349] The first coefficient is indicated by the second configuration information, and the second coefficient is determined based on the first coefficient; or,

[0350] The second coefficient is indicated by the second configuration information, and the first coefficient is determined based on the second coefficient; or,

[0351] The first coefficient and the second coefficient are indicated by the second configuration information; or,

[0352] The second coefficient is indicated by the second configuration information, and the first coefficient is a fixed value.

[0353] In some embodiments, the first coefficient is 1, and the second coefficient is greater than 0 and less than 1; or, the first coefficient is greater than 0, the second coefficient is greater than 0, and the sum of the first coefficient and the second coefficient is 1.

[0354] In some embodiments, the terminal device 1500 further includes:

[0355] The second measurement unit is configured to perform channel measurement based on the second reference signal to obtain a second interference power, wherein the second interference power is used to determine the first CSI at least with the channel power and the first interference power.

[0356] In some embodiments, the first CSI includes one or more of the following: a quantized value of a first signal-to-interference-plus-noise ratio (SINR), wherein the first SINR is the SINR under the assumption of superimposed transmission of demodulation reference signal (DMRS) and data;

[0357] The recommended DMRS power ratio or data power ratio, wherein the DMRS power ratio is the power ratio of DMRS on the second resource, and the data power ratio is the power ratio of data on the second resource, wherein the second resource is a resource for DMRS and data superimposed transmission;

[0358] Second channel information based on the assumption of DMRS and data overlay transmission.

[0359] In some embodiments, if the first CSI includes a quantized value of the first SINR, and / or the proposed DMRS power ratio, the first coefficient is the DMRS power ratio and the second coefficient is the data power ratio.

[0360] In some embodiments, if the first CSI includes the quantized value of the first SINR, and / or the proposed data power ratio, and / or the second channel information, the first coefficient is the data power ratio and the second coefficient is the DMRS power ratio.

[0361] In some embodiments, the second determining unit 1504 is further configured to:

[0362] If the first CSI includes the quantized value of the first SINR, the first SINR is determined by taking the channel power as the signal and at least the first interference power as the interference;

[0363] Determine the quantization value of the first SINR.

[0364] In some embodiments, the second determining unit 1504 is further configured to:

[0365] If the first CSI includes the proposed DMRS power ratio or data power ratio, the second channel information is determined based on the proposed DMRS power ratio or data power ratio, wherein the proposed DMRS power ratio or data power ratio is determined at least based on the channel power and the first interference power.

[0366] In some embodiments, the second channel information includes one or more of the following: rank indicator RI, precoder matrix indicator PMI, and channel quality information CQI.

[0367] In some embodiments, the proposed DMRS power ratio or data power ratio is one of a plurality of first power ratios, which are a plurality of first DMRS power ratios or first data power ratios indicated by the network device to the terminal device or agreed upon by the terminal device and the network device.

[0368] In some embodiments, the proposed DMRS power ratio or data power ratio is the smallest DMRS power ratio or the largest data power ratio among one or more second power ratios, wherein the one or more second power ratios are power ratios among the plurality of first power ratios that meet the target SINR requirement.

[0369] In some embodiments, the second determining unit 1504 is further configured to: if the first CSI includes the proposed DMRS power ratio or data power ratio, for each of the plurality of first power ratios, to obtain a second SINR corresponding to the first power ratio based at least on the channel power and the first interference power corresponding to the first power ratio, wherein the first coefficient or the second coefficient is the first power ratio;

[0370] Determine one or more second power ratios among the plurality of first power ratios that correspond to the second SINR meeting the target SINR requirement;

[0371] The smallest DMRS power ratio or the largest data power ratio among the one or more of the second power ratios shall be taken as the proposed DMRS power ratio or data power ratio.

[0372] In some embodiments, the first reference signal is a DMRS or a precoded Channel State Information Reference Signal (CSI-RS); the second reference signal is a DMRS or a precoded CSI-RS.

[0373] In some embodiments, the first reference signal and the second reference signal are DMRS on different DMRS ports, or the first reference signal and the second reference signal are CSI-RS on different CSI-RS ports.

[0374] In some embodiments, the first channel information includes: a channel matrix, a channel covariance matrix, a channel eigenvector, or the received power of the channel.

[0375] Understandably, the first communication unit, the first measurement unit, the first determination unit, the second determination unit, and the second measurement unit in the terminal device can be implemented collaboratively by the transceiver and the processor in the terminal device.

[0376] Figure 16 is a schematic diagram of the structure of a network device provided in an embodiment of this application. As shown in Figure 16, the network device 1600 includes:

[0377] The second communication unit 1601 is configured to send first configuration information, the first configuration information being used to configure a first reference signal, the first reference signal being used by the terminal device to perform channel measurement to obtain first channel information;

[0378] The second communication unit 1601 is further configured to receive first channel state information (CSI), the first CSI being determined at least based on channel power and first interference power, the channel power being determined based on the first channel information and a first coefficient, and the first interference power being based on the first channel information and a second coefficient.

[0379] In some embodiments, the second communication unit 1601 is further configured to send second configuration information, the second configuration information being used to indicate a first coefficient and / or a second coefficient, and / or, the second configuration information being used to indicate a plurality of first coefficient groups, the first coefficient groups including the first coefficient and / or the second coefficient.

[0380] In some embodiments, the first coefficient is indicated by the second configuration information, and the second coefficient is determined based on the first coefficient; or, the second coefficient is indicated by the second configuration information, and the first coefficient is determined based on the second coefficient; or, the first coefficient and the second coefficient are indicated by the second configuration information; or, the second coefficient is indicated by the second configuration information, and the first coefficient is a fixed value.

[0381] In some embodiments, the first coefficient is 1, and the second coefficient is greater than 0 and less than 1; or, the first coefficient is greater than 0, the second coefficient is greater than 0, and the sum of the first coefficient and the second coefficient is 1.

[0382] In some embodiments, the first CSI is determined at least based on channel power, a first interference power, and a second interference power, wherein the second interference power is obtained by the terminal device performing channel measurements on the signal under the second reference.

[0383] In some embodiments, the first CSI includes one or more of the following:

[0384] The first signal-to-interference-plus-noise ratio (SINR) is a quantized value, where the first SINR is the SINR based on the assumption of DMRS and data superposition transmission.

[0385] The recommended DMRS power ratio or data power ratio, wherein the DMRS power ratio is the power ratio of DMRS on the second resource, and the data power ratio is the power ratio of data on the second resource, wherein the second resource is a resource for DMRS and data superimposed transmission;

[0386] Second channel information based on the assumption of DMRS and data overlay transmission.

[0387] In some embodiments, if the first CSI includes a quantized value of the first SINR, and / or the proposed DMRS power ratio, the first coefficient is the DMRS power ratio and the second coefficient is the data power ratio.

[0388] In some embodiments, if the first CSI includes the quantized value of the first SINR, the proposed data power ratio, and / or the second channel information, the first coefficient is the data power ratio, and the second coefficient is the DMRS power ratio.

[0389] In some embodiments, the second channel information includes one or more of the following: rank indicator RI, precoder matrix indicator PMI, and channel quality information CQI.

[0390] In some embodiments, the proposed DMRS power ratio or data power ratio is one of a plurality of first power ratios, which are a plurality of first DMRS power ratios or first data power ratios indicated by the network device to the terminal device or agreed upon by the terminal device and the network device.

[0391] In some embodiments, the proposed DMRS power ratio or data power ratio is the smallest DMRS power ratio or the largest data power ratio among one or more second power ratios, wherein the one or more second power ratios are power ratios among the plurality of first power ratios that meet the target SINR requirement.

[0392] In some embodiments, the first reference signal is a DMRS or a precoded Channel State Information Reference Signal (CSI-RS); the second reference signal is a DMRS or a precoded CSI-RS.

[0393] In some embodiments, the first reference signal and the second reference signal are DMRS on different DMRS ports, or the first reference signal and the second reference signal are CSI-RS on different CSI-RS ports.

[0394] In some embodiments, the first channel information includes: a channel matrix, a channel covariance matrix, a channel eigenvector, or the received power of the channel.

[0395] The second communication unit in the network device can be implemented by a transceiver in the network device. Understandably, the network device may also include a processing unit for determining the first configuration information. The processing unit can be implemented by a processor in the network device.

[0396] Those skilled in the art should understand that the descriptions of the terminal devices or network devices described in the embodiments of this application can be understood with reference to the descriptions of the wireless communication methods in the embodiments of this application.

[0397] Figure 17 is a schematic structural diagram of a communication device 1700 provided in an embodiment of this application. This communication device can be a terminal device or a network device. The communication device 1700 shown in Figure 17 includes a processor 1710, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0398] Optionally, as shown in FIG17, the communication device 1700 may further include a memory 1720. The processor 1710 may retrieve and run computer programs from the memory 1720 to implement the methods described in the embodiments of this application.

[0399] The memory 1720 can be a separate device independent of the processor 1710, or it can be integrated into the processor 1710.

[0400] Optionally, as shown in FIG17, the communication device 1700 may further include a transceiver 1730, and the processor 1710 may control the transceiver 1730 to communicate with other devices. Specifically, it may send information or data to other devices or receive information or data sent by other devices.

[0401] The transceiver 1730 may include a transmitter and a receiver. The transceiver 1730 may further include an antenna, and the number of antennas may be one or more.

[0402] Optionally, the communication device 1700 may specifically be a network device in the embodiments of this application, and the communication device 1700 may implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0403] Optionally, the communication device 1700 may specifically be a mobile terminal / terminal device in the embodiments of this application, and the communication device 1400 may implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, these will not be described in detail here.

[0404] Figure 18 is a schematic structural diagram of a chip according to an embodiment of this application. The chip 1800 shown in Figure 18 includes a processor 1810, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0405] Optionally, as shown in FIG18, chip 1800 may further include memory 1820. Processor 1810 can call and run computer programs from memory 1820 to implement the methods in the embodiments of this application.

[0406] The memory 1820 can be a separate device independent of the processor 1810, or it can be integrated into the processor 1810.

[0407] Optionally, the chip 1800 may also include an input interface 1830. The processor 1810 can control the input interface 1830 to communicate with other devices or chips; specifically, it can acquire information or data sent by other devices or chips.

[0408] Optionally, the chip 1800 may also include an output interface 1840. The processor 1810 can control the output interface 1840 to communicate with other devices or chips, specifically, to output information or data to other devices or chips.

[0409] Optionally, the chip can be applied to the network device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0410] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0411] 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.

[0412] Figure 19 is a schematic block diagram of a communication system 1900 provided in an embodiment of this application. As shown in Figure 19, the communication system 1900 includes a terminal device 1910 and a network device 1920.

[0413] The terminal device 1910 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1920 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, these will not be elaborated here.

[0414] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0415] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can 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. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0416] It should be understood that the above-described memory is exemplary and not a limiting description. For example, the memory in the embodiments of this application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DR RAM), etc. That is to say, the memory in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0417] This application also provides a computer-readable storage medium for storing computer programs.

[0418] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0419] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0420] This application also provides a computer program product, including computer program instructions.

[0421] Optionally, the computer program product can be applied to the network device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0422] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0423] This application also provides a computer program.

[0424] Optionally, the computer program can be applied to the network device in the embodiments of this application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0425] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0426] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0427] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0428] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless communication method, the method comprising: The terminal device receives first configuration information, which is used to configure a first reference signal; The terminal device performs channel measurement based on the first reference signal to obtain first channel information; The terminal device determines the channel power based on the first channel information and the first coefficient, and determines the first interference power based on the first channel information and the second coefficient. The terminal device determines the first channel state information (CSI) based at least on the channel power and the first interference power.

2. The method according to claim 1, wherein, The method further includes: The terminal device receives second configuration information, which is used to indicate the first coefficient and / or the second coefficient, and / or, the second configuration information is used to indicate a plurality of first coefficient groups, the first coefficient groups including the first coefficient and / or the second coefficient.

3. The method according to claim 2, wherein, The first coefficient is indicated by the second configuration information, and the second coefficient is determined based on the first coefficient; or, The second coefficient is indicated by the second configuration information, and the first coefficient is determined based on the second coefficient; or, The first coefficient and the second coefficient are indicated by the second configuration information; or, The second coefficient is indicated by the second configuration information, and the first coefficient is a fixed value.

4. The method according to any one of claims 1 to 3, wherein, The first coefficient is 1, and the second coefficient is greater than 0 and less than 1; or, the first coefficient is greater than 0, the second coefficient is greater than 0, and the sum of the first coefficient and the second coefficient is 1.

5. The method according to any one of claims 1 to 4, wherein, The method further includes: The terminal device performs channel measurement based on the second reference signal to obtain a second interference power, which is used to determine the first CSI at least with the channel power and the first interference power.

6. The method according to any one of claims 1 to 5, wherein, The first CSI includes one or more of the following: The first signal-to-interference-plus-noise ratio (SINR) is a quantized value, where the first SINR is the SINR under the assumption of superimposed transmission of the demodulation reference signal DMRS and the data. The recommended DMRS power ratio or data power ratio, wherein the DMRS power ratio is the power ratio of DMRS on the second resource, and the data power ratio is the power ratio of data on the second resource, wherein the second resource is a resource for DMRS and data superimposed transmission; Second channel information based on the assumption of DMRS and data overlay transmission.

7. The method according to claim 6, wherein, If the first CSI includes the quantized value of the first SINR, and / or the proposed DMRS power ratio, the first coefficient is the DMRS power ratio and the second coefficient is the data power ratio.

8. The method according to claim 6, wherein, If the first CSI includes the quantized value of the first SINR, and / or the proposed data power ratio, and / or the second channel information, the first coefficient is the data power ratio, and the second coefficient is the DMRS power ratio.

9. The method according to any one of claims 6 to 8, wherein, If the first CSI includes the quantized value of the first SINR, the terminal device determines the first CSI based at least on the channel power and the first interference power, including: The terminal device uses the channel power as a signal and at least the first interference power as interference to determine the first SINR; The terminal device determines the quantization value of the first SINR.

10. The method according to any one of claims 6 to 8, wherein, If the first CSI includes the proposed DMRS power ratio or data power ratio and the second channel information, the terminal device determines the first CSI based at least on the channel power and the first interference power, including: The terminal device determines the second channel information based on the proposed DMRS power ratio or data power ratio, wherein the proposed DMRS power ratio or data power ratio is determined at least based on the channel power and the first interference power.

11. The method according to claim 6, 8, or 10, wherein, The second channel information includes one or more of the following: rank indicator (RI), precoder matrix indicator (PMI), and channel quality information (CQI).

12. The method according to any one of claims 6 to 11, wherein, The proposed DMRS power ratio or data power ratio is one of a plurality of first power ratios, which are a plurality of first DMRS power ratios or first data power ratios indicated by the network device to the terminal device or agreed upon by the terminal device and the network device.

13. The method according to claim 12, wherein, The proposed DMRS power ratio or data power ratio is the smallest DMRS power ratio or the largest data power ratio among one or more second power ratios, wherein the one or more second power ratios are the power ratios among the plurality of first power ratios that meet the target SINR requirement.

14. The method according to claim 13, wherein, If the first CSI includes the proposed DMRS power ratio or data power ratio, the terminal device determines the first CSI based at least on the channel power and the first interference power, including: For each of the plurality of first power ratios, the terminal device obtains a second SINR corresponding to the first power ratio based at least on the channel power and the first interference power corresponding to the first power ratio, wherein the first coefficient or the second coefficient is the first power ratio; The terminal device determines one or more second power ratios among the plurality of first power ratios that correspond to the second SINR that meet the target SINR requirement; The terminal device uses the smallest DMRS power ratio or the largest data power ratio among the one or more of the second power ratios as the recommended DMRS power ratio or data power ratio.

15. The method according to any one of claims 1 to 14, wherein, The first reference signal is DMRS or a precoded Channel State Information Reference Signal (CSI-RS); the second reference signal is DMRS or a precoded CSI-RS.

16. The method according to claim 15, wherein, The first reference signal and the second reference signal are DMRS on different DMRS ports, or the first reference signal and the second reference signal are CSI-RS on different CSI-RS ports.

17. The method according to any one of claims 1 to 16, wherein, The first channel information includes: channel matrix, channel covariance matrix, channel eigenvector, or channel received power.

18. A wireless communication method, the method comprising: The network device sends first configuration information, which is used to configure a first reference signal. The first reference signal is used by the terminal device to perform channel measurement to obtain first channel information. The network device receives first channel state information (CSI), which is determined at least based on channel power and first interference power. The channel power is determined based on the first channel information and a first coefficient, and the first interference power is determined based on the first channel information and a second coefficient.

19. The method according to claim 18, wherein, The method further includes: The network device sends second configuration information, which is used to indicate a first coefficient and / or a second coefficient, and / or, the second configuration information is used to indicate a plurality of first coefficient groups, the first coefficient groups including the first coefficient and / or the second coefficient.

20. The method according to claim 19, wherein, The first coefficient is indicated by the second configuration information, and the second coefficient is determined based on the first coefficient; or, The second coefficient is indicated by the second configuration information, and the first coefficient is determined based on the second coefficient; or, The first coefficient and the second coefficient are indicated by the second configuration information; or, The second coefficient is indicated by the second configuration information, and the first coefficient is a fixed value.

21. The method according to any one of claims 18 to 20, wherein, The first coefficient is 1, and the second coefficient is greater than 0 and less than 1; or, the first coefficient is greater than 0, the second coefficient is greater than 0, and the sum of the first coefficient and the second coefficient is 1.

22. The method according to any one of claims 18 to 21, wherein, The first CSI is determined at least based on the channel power, the first interference power, and the second interference power, wherein the second interference power is obtained by the terminal device performing channel measurements on the signal under the second reference.

23. The method according to any one of claims 18 to 22, wherein, The first CSI includes one or more of the following: The first signal-to-interference-plus-noise ratio (SINR) is a quantized value, where the first SINR is the SINR based on the assumption of DMRS and data superposition transmission. The recommended DMRS power ratio or data power ratio, wherein the DMRS power ratio is the power ratio of DMRS on the second resource, and the data power ratio is the power ratio of data on the second resource, wherein the second resource is a resource for DMRS and data superimposed transmission; Second channel information based on the assumption of DMRS and data overlay transmission.

24. The method according to claim 23, wherein, If the first CSI includes the quantized value of the first SINR, and / or the proposed DMRS power ratio, the first coefficient is the DMRS power ratio and the second coefficient is the data power ratio.

25. The method according to claim 31, wherein, If the first CSI includes the quantized value of the first SINR, and / or the proposed data power ratio, and / or the second channel information, the first coefficient is the data power ratio, and the second coefficient is the DMRS power ratio.

26. The method according to claim 23 or 25, wherein, The second channel information includes one or more of the following: rank indicator (RI), precoder matrix indicator (PMI), and channel quality information (CQI).

27. The method according to any one of claims 23 to 26, wherein, The proposed DMRS power ratio or data power ratio is one of a plurality of first power ratios, which are a plurality of first DMRS power ratios or first data power ratios indicated by the network device to the terminal device or agreed upon by the terminal device and the network device.

28. The method according to claim 27, wherein, The proposed DMRS power ratio or data power ratio is the smallest DMRS power ratio or the largest data power ratio among one or more second power ratios, wherein the one or more second power ratios are the power ratios among the plurality of first power ratios that meet the target SINR requirement.

29. The method according to any one of claims 18 to 28, wherein, The first reference signal is DMRS or a precoded Channel State Information Reference Signal (CSI-RS); the second reference signal is DMRS or a precoded CSI-RS.

30. The method according to claim 29, wherein, The first reference signal and the second reference signal are DMRS on different DMRS ports, or the first reference signal and the second reference signal are CSI-RS on different CSI-RS ports.

31. The method according to any one of claims 18 to 30, wherein, The first channel information includes: channel matrix, channel covariance matrix, channel eigenvector, or channel received power.

32. A terminal device, comprising: A first communication unit is configured to receive first configuration information, wherein the first configuration information is used to configure a first reference signal; The first measurement unit is configured to perform channel measurement based on the first reference signal to obtain first channel information; The first determining unit is configured to determine the channel power based on the first channel information and the first coefficient, and to determine the first interference power based on the first channel information and the second coefficient. The second determining unit is configured to determine the first channel state information (CSI) based at least on the channel power and the first interference power.

33. A network device, comprising: The second communication unit is configured to send first configuration information, the first configuration information being used to configure a first reference signal, the first reference signal being used by the terminal device to perform channel measurement to obtain first channel information; The second communication unit is further configured to receive first channel state information (CSI), the first CSI being determined at least based on channel power and first interference power, the channel power being determined based on the first channel information and a first coefficient, and the first interference power being based on the first channel information and a second coefficient.

34. A terminal device, comprising: A transceiver, a processor, and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to cooperate with the transceiver in performing the method as described in any one of claims 1 to 17.

35. A network device, comprising: A transceiver, a processor, and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to cooperate with the transceiver in performing the method as described in any one of claims 18 to 31.

36. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device having the chip mounted to perform the method as claimed in any one of claims 1 to 17, or the method as claimed in any one of claims 18 to 31.

37. A computer-readable storage medium for storing a computer program, the execution of which causes the computer to perform the method as claimed in any one of claims 1 to 17, or the method as claimed in any one of claims 18 to 31.

38. A computer program product comprising computer program instructions, the execution of which causes a computer to perform the method as claimed in any one of claims 1 to 17, or to perform the method as claimed in any one of claims 18 to 31.

39. A computer program, the execution of which causes a computer to perform the method as claimed in any one of claims 1 to 17, or to perform the method as claimed in any one of claims 18 to 31.

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