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, storage medium TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of mobile communication, in particular to a wireless communication method and device, storage medium. BACKGROUND

[0002] In order to reduce the overhead of a Demodulation Reference Signal (DMRS) and improve transmission rate, a method of superimposed transmission of DMRS and data can be considered. In this method, DMRS and data can occupy the same physical resources and be superimposed by using a certain transmission power ratio, so that DMRS does not need to be transmitted by using special resources, and the resource overhead is obviously reduced.

[0003] SUMMARY

[0004] Embodiments of the present application provide a wireless communication method and device, storage medium.

[0005] The wireless communication method provided by the embodiments of the present application comprises:

[0006] The terminal device receives first configuration information, and the first configuration information 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 channel power based on the first channel information and a first coefficient, and determines first interference power based on the first channel information and a second coefficient;

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

[0010] The wireless communication method provided by the embodiments of the present application comprises:

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

[0012] The network device receives first Channel State Information (CSI), and the first CSI is determined based on at least 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 by the embodiments of the present application comprises:

[0014] a first communication unit, configured to receive first configuration information, the first configuration information being used for configuring a first reference signal;

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

[0016] a first determination unit, configured to determine channel power based on the first channel information and a first coefficient, and determine first interference power based on the first channel information and a second coefficient;

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

[0018] The network device provided by the embodiments of the present application comprises:

[0019] a second communication unit, configured to send first configuration information, the first configuration information being used for configuring a first reference signal, the first reference signal being used for a 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 based on at least 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 determined based on the first channel information and a second coefficient.

[0021] The communication device provided by the embodiments of the present application can be the terminal device in the above scheme or the network device in the above scheme, and the communication device comprises a transceiver, a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to cooperate with the transceiver to execute the wireless communication method described above.

[0022] The chip provided by the embodiments of the present application is used for implementing the wireless communication method described above.

[0023] Specifically, the chip comprises a processor, which is used for calling and running a computer program from a memory, so that a device installed with the chip executes the wireless communication method described above.

[0024] The computer readable storage medium provided by the embodiments of the present application is used for storing a computer program, and the computer program causes a computer to execute the wireless communication method described above.

[0025] The computer program product provided by the embodiments of the present application comprises computer program instructions, and the computer program instructions cause a computer to execute the wireless communication method described above.

[0026] The computer program provided by the embodiment of the application, when running on a computer, enables the computer to execute the wireless communication method described above.

[0027] Through the technical solution described above, the terminal device performs channel measurement based on the first reference signal, determines the channel power and the first interference power under the reference signal and data superposition transmission assumption based on the measurement result, and determines the channel state information under the reference signal and data superposition transmission assumption through the channel power and the first interference power under the reference signal and data superposition transmission assumption, so as to ensure the transmission performance under the DMRS and data superposition transmission condition. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application. In the drawings:

[0029] FIG. 1 is a schematic diagram of an application scenario of an embodiment of the application;

[0030] FIG. 2 is a schematic diagram of a CSI reporting method provided by an embodiment of the application;

[0031] FIG. 3 is a schematic diagram of optional resources of DMRS and uplink data superposition transmission provided by an embodiment of the application;

[0032] FIG. 4 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0033] FIG. 5 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0034] FIG. 6 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0035] FIG. 7 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0036] FIG. 8 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0037] FIG. 9 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0038] FIG. 10 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0039] FIG. 11 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0040] FIG. 12 is a schematic diagram of an optional process of a wireless communication method provided by an embodiment of the application;

[0041] FIG. 13 is an optional flow diagram of a wireless communication method according to an embodiment of the present application;

[0042] FIG. 14 is an optional flow diagram of a wireless communication method according to an embodiment of the present application;

[0043] FIG. 15 is an optional structure diagram of a terminal device according to an embodiment of the present application;

[0044] FIG. 16 is an optional structure diagram of a network device according to an embodiment of the present application;

[0045] FIG. 17 is an optional structure diagram of a communication device according to an embodiment of the present application;

[0046] FIG. 18 is an optional structure diagram of a chip according to an embodiment of the present application;

[0047] FIG. 19 is an optional structure diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0049] FIG. 1 is a structure diagram of a communication system according to an embodiment of the present application. As shown in FIG. 1, the communication system 100 can include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 through an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

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

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

[0052] The terminal device 110 can be any terminal device, including but not limited to a terminal device that uses a wired or wireless connection with the network device 120 or other terminal devices.

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

[0054] The various functional units in the communication system 100 can also communicate through a next generation (NG) interface to establish a connection and implement communication.

[0055] FIG. 1 exemplarily shows one base station, one core network device and two terminal devices. Optionally, the wireless communication system 100 can include multiple base station devices and each base station can include other numbers of terminal devices within its coverage range, and the embodiments of the present application do not limit this.

[0056] It should be noted that FIG. 1 only schematically shows a system to which the present application is applicable, and of course, the method shown in the embodiments of the present application can also be applicable to other systems. In addition, the terms "system" and "network" are often used interchangeably in this document.

[0057] In order to facilitate understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be combined with the technical solutions of the embodiments of the present application in any way as optional solutions, and all belong to the protection scope of the embodiments of the present application.

[0058] Downlink CSI feedback

[0059] In order for the network device to perform reasonable scheduling, the terminal device needs to feed back downlink CSI to enable the base station to determine the scheduling information of the terminal device such as the number of transmission layers, the precoding matrix, the transmission beam, and the modulation and coding mode. Specifically, the CSI reporting of the terminal 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 resource used by the terminal device to report the CSI 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 reporting, and each CSI reporting can contain different information such as a CSI-RS resource indicator (CRI), a rank indicator (RI), a pre-coding matrix indication (PMI), and a channel quality indicator (CQI). These information are obtained based on the CSI-RS signal configured and sent by the network device. Specifically, what content / information is contained in the CSI is determined by the reporting quantity information (reportQuantity) in the CSI reporting configuration. The reporting quantity information can indicate one of the following reporting quantities:

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

[0061] The RI is used to report the recommended number of transmission layers;

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

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

[0064] The reference signal receiving power (RSRP) is used to report the RSRP of the synchronization signal block (SSB) or the CSI-RS corresponding to the index fed back, thereby enabling the network side to determine the beam used for downlink transmission.

[0065] The layer indicator (LI) is used to report the index of the transmission layer associated with the PTRS.

[0066] Wherein, the RI, PMI or CQI can be determined based on the signal to interference and noise ratio (SINR) estimated by the terminal device. The channel part in the SINR is determined based on the non-zero power CSI-RS configured by the network for channel measurement, and the interference part is determined based on the CSI-IM or non-zero power CSI-RS configured by the network for interference measurement. Wherein, the CSI-RS resource for channel measurement can contain multiple antenna ports, for measuring the complete channel of the downlink to calculate the CSI. Each port of the CSI-RS resource for interference measurement corresponds to one interference transmission layer, and the terminal device can measure the interference of different transmission layers of different UEs on the terminal device from the resource.

[0067] The CSI reporting of the terminal can have three periodic reporting modes as shown in FIG. 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), and the CSI reporting configuration thereof is configured by the radio resource control (RRC) signaling. After the terminal device receives the corresponding RRC configuration, the CSI is reported periodically.

[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 corresponding to the CSI reporting transmitted on the PUCCH is pre-configured by the RRC signaling, and is activated or deactivated by the media access control (MAC) layer signaling. In 203, the CSI corresponding to the CSI reporting transmitted on the PUSCH is dynamically indicated (activated or deactivated) by the downlink control information (DCI) signaling. After the terminal device receives the activation indication signaling configured by the network, the CSI is periodically transmitted on the PUCCH or the PUSCH until the deactivation signaling is received.

[0070] The aperiodic CSI reporting shown in 204 is also pre-configured by the RRC signaling, and part of the configuration thereof can be activated by the MAC layer signaling, and then the CSI reporting configuration for CSI reporting is indicated by the CSI trigger signaling in the DCI. After the terminal receives the CSI trigger signaling, the corresponding CSI is reported on the scheduled PUSCH according to the indicated CSI reporting configuration.

[0071] Data and DMRS superposition transmission

[0072] In order to reduce the overhead of DMRS and improve the transmission rate, a superposition transmission mode of DMRS and data can be considered, as shown in FIG. 3. A resource element (RE) 301 is used for a control channel, and an RE 302 is used for data and DMRS. In this mode, DMRS and data occupy the same physical resource and are superimposed by a certain transmission power ratio (i.e., the DMRS and data signals of the same terminal device are superimposed on the same resource, and the RE is the smallest resource unit for signal transmission). At the receiving end, the mutual interference between DMRS and data is reduced or eliminated through the interference cancellation process of an artificial intelligence (AI) receiver or a non-AI receiver, and the data is successfully detected. In FIG. 3, the physical resource used for transmitting data can superimpose DMRS at the same time, and there is no need to send DMRS with special resources, which obviously reduces the overhead of pilot resources and improves the spectral efficiency of the downlink.

[0073] In the related art, the measurement of CSI does not consider the superposition transmission scenario of DMRS and data, so the estimated CSI does not consider the mutual interference between DMRS and data, resulting in inaccurate CSI in this scenario. In addition, for superposition transmission, the network device needs to determine the power allocation ratio between DMRS and data under the premise of a certain total power. If the power ratio of DMRS is too low, the channel estimation performance cannot meet the requirements of interference cancellation and demodulation, and the demodulation performance will deteriorate sharply; if the power ratio of DMRS is too high, the power loss of data will be too large, which will cause the bit error rate to rise. Since the network device cannot know the actual transmission quality of DMRS, it is also impossible to set a reasonable DMRS power ratio to obtain the optimal transmission performance.

[0074] In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0075] The embodiments of the present application provide a wireless communication method applied to a terminal device, as shown in FIG. 4, which includes the following steps.

[0076] S401, a terminal device receives first configuration information, wherein the first configuration information 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 channel power based on the first channel information and the first coefficient, and determines first interference power based on the first channel information and the second coefficient;

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

[0080] Embodiments of the present application provide a wireless communication method, applied to a network device, as shown in FIG. 5, comprising:

[0081] S501, the network device sends first configuration information, the first configuration information is used for configuring a first reference signal, and the first reference signal is used for 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 is determined based on at least channel power and first interference power, the channel power is determined based on the first channel information and the first coefficient, and the first interference power is determined based on the first channel information and the second coefficient.

[0083] Embodiments of the present application provide a wireless communication method, applied to a wireless communication system comprising a terminal device and a network device, as shown in FIG. 6, comprising:

[0084] S601, the network device sends first configuration information to the terminal device, the first configuration information is used for configuring a 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 channel power based on the first channel information and the first coefficient, and determines first interference power based on the first channel information and the second coefficient;

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

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

[0089] Next, the wireless communication method shown in FIG. 4, FIG. 5 or FIG. 6 is described.

[0090] It can be understood that the network device sends first configuration information to the terminal device, the first configuration information is used for configuring a first reference signal or the first configuration information is used for indicating configuration information of the first reference signal, so that the terminal device performs channel measurement based on the first reference signal to obtain first channel information.

[0091] In the embodiments of the present application, the first reference signal can be a downlink reference signal.

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

[0093] The first coefficient can be understood as a power ratio of a signal part under the assumption of DMRS and data superposition transmission, and the first coefficient and the first channel information can determine the power of the signal part, that is, the channel power. The second coefficient can be understood as a power ratio of an interference part under the assumption of DMRS and data superposition transmission, and the second coefficient and the first channel information can determine the power of the interference part, that is, the first interference power.

[0094] Under the assumption of DMRS and data superposition transmission, according to different types of CSI to be measured, it can be assumed that the DMRS is the signal and the data is the interference, or it can be assumed that the data is the signal and the DMRS is the interference.

[0095] It can be understood that the assumption of DMRS and data superposition transmission is the case of assumed DMRS and data superposition transmission.

[0096] After the terminal device determines the channel power and the first interference power, the terminal device determines the CSI under the assumption of DMRS and data superposition transmission, that is, the first CSI, based on the channel power and the first interference power.

[0097] In the embodiments of the present application, the terminal device can determine the first CSI based on at least the channel power and the first interference power.

[0098] After the terminal device determines the first CSI, the terminal device reports the first CSI to the network device. After the network device receives the first CSI reported by the terminal device, the network device configures the scheduling information under the assumption of DMRS and data superposition transmission based on the first CSI, so as to ensure the transmission performance under the condition of DMRS and data superposition transmission.

[0099] In the embodiments of the present application, the method shown in FIG. 3, FIG. 4 or FIG. 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 a port set in a plurality of ports, and report the first CSI corresponding to each port or the port set to the network device. The terminal device can also determine the first CSI corresponding to a specified port in the plurality of ports, and report the first CSI corresponding to the specified port to the network device. Wherein, for different ports or port sets, the determination manner of the corresponding first CSI is the same and independent. Wherein, the port here can be a DMRS port or a CSI-RS port.

[0100] The wireless communication method provided in the embodiments of the present application can ensure the transmission performance in the case of DMRS and data superposition transmission.

[0101] In some embodiments, the wireless communication method shown in FIG. 4, as shown in FIG. 7, can further include:

[0102] In some embodiments, the wireless communication method shown in FIG. 4, as shown in FIG. 7, can further include:

[0103] In the embodiments of the present application, the execution of S401 can be before S402.

[0104] In some embodiments, the wireless communication method shown in FIG. 5, as shown in FIG. 8, can further include:

[0105] In some embodiments, the wireless communication method shown in FIG. 5, as shown in FIG. 8, can further include:

[0106] In the embodiments of the present application, the execution of S801 can be before S502.

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

[0108] The second configuration information configured by the network device can be used to indicate the first coefficient and / or the second coefficient, that is, a first coefficient group. The second configuration information configured by the network device can also be used to indicate a plurality of first coefficient groups, and a first coefficient group includes the first coefficient and / or the second coefficient. It can be understood that 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 the second coefficient group includes the first coefficient and the second coefficient. In an implementation, the plurality of first coefficient groups are used to indicate the first coefficient and / or the candidate value of the first coefficient, and each first coefficient group corresponds to a group of candidate values.

[0109] In an embodiment of the present application, when the second configuration information indicates one of the first coefficient and the second coefficient, the other coefficient can be determined based on the one indicated by the second configuration information, or can be pre-agreed between 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 according to the first coefficient; or the second coefficient is indicated by the second configuration information, and the first coefficient is determined according to 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] It can be understood that if the second configuration information indicates one first coefficient, the other coefficient corresponding to the first coefficient, i.e., the second coefficient, is determined by the first coefficient indicated by the second configuration information. In an example, the network device indicates the first coefficient as k1 through the second configuration information, and the second coefficient can be k2 = 1-k1.

[0112] It can be understood that if the second configuration information indicates one second coefficient, the other coefficient corresponding to the 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 an example, the network device indicates the second coefficient as k2 through the second configuration information, and the first coefficient can be k1 = 1-k2. In an example, the network device indicates the second coefficient as k2 through the second configuration information, and the first coefficient is 1.

[0113] It can be understood that the second configuration information indicates one first coefficient and one second coefficient. In an example, the network device indicates the first coefficient as k1 and the second coefficient as k2 through the second configuration information.

[0114] It can be understood that if the second configuration information indicates multiple first coefficients, the other coefficients corresponding to the first coefficients, i.e., the second coefficients, are determined by the corresponding first coefficients. In an example, the network device indicates the following first coefficients through the second configuration information: {k 11 , k 12 , k 13 , k 14 , k 15}, and the corresponding second coefficients include the following: {1-k 11 , 1-k 12 , 1-k 13 , 1-k 14 , 1-k 15}.

[0115] It can be understood that if the second configuration information indicates a plurality of second coefficients, another coefficient corresponding to each second coefficient, i.e., a first coefficient, is determined by the corresponding second coefficient or is a fixed value. In an example, the network device indicates the following second coefficients through the second configuration information: {k 21 , k 22 , k 23 , k 24 , k 25}, and includes the following first coefficients: {1-k 21 , 1-k 22 , 1-k 23 , 1-k 24 , 1-k 25}.

[0116] In an example, the network device indicates the following second coefficients through the second configuration information: {k 21 , k 22 , k 23 , k 24 , k 25}, and the value of the first coefficient corresponding to each second coefficient is a fixed value k.

[0117] It can be understood that the second configuration information indicates a plurality of corresponding first coefficients and second coefficients.

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

[0119] In the embodiments of the present application, the second configuration information can be transmitted through high layer signaling.

[0120] It can be understood that one or more second coefficient groups can also be previously agreed upon by the terminal device and the network device. At this time, the network device does not need to configure the second configuration information.

[0121] In the embodiments of the present application, the terminal device can determine one or more power groups based on one or more second coefficient groups, one second coefficient group includes one first coefficient and one second coefficient, one power group includes one channel power and one first interference power, and one second coefficient group is used to determine one power group. In the case that the terminal device determines one power group based on one second coefficient group, the terminal device determines the first CSI based on the power group. In the case that the terminal device determines a plurality of power groups based on a plurality of second coefficient groups, each second coefficient group can obtain a corresponding power group as a candidate coefficient group, and the plurality of power groups correspond to a plurality of candidate first CSIs, and the terminal device selects one from the plurality of 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 the embodiments of the present application, 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, and can also be applied to the case where the second configuration information indicates the first coefficient and / or the second coefficient.

[0124] For the case 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, 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, 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 FIG. 4, as shown in FIG. 9, can further include:

[0126] S901, the terminal device performs channel measurement based on the second reference signal to obtain a 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 the embodiments of the present application, the execution of S901 is located before S404, and in the case where the terminal device executes S901, S404 can be replaced by: the terminal device determines the first CSI based on at least 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 FIG. 5, the first CSI is determined based on at least the channel power and the first interference power, and the second interference power obtained by the terminal device performing channel measurement on the second reference signal.

[0129] The second reference signal is another reference signal different from the first reference signal, the terminal device performs channel measurement based on the second reference signal to obtain a second interference power, and the second interference power can represent interference from other data transmission layers of the terminal device, or interference from other cells in the same resource multiplexing user.

[0130] In the embodiments of the present application, the network device sends third configuration information to the terminal device, the third configuration information is used for configuring the second reference signal or the third configuration information is used for indicating configuration information of the second reference signal. The terminal device performs receiving or sending of the second reference signal based on the third configuration information, and the second reference signal is used for the terminal device to measure to obtain the second interference power. Further, the terminal device performs calculation of the first CSI according to 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 FIG. 4 can further include:

[0132] The terminal device performs measurement based on the first resource to obtain a third interference power, and the third interference power is used at least for determining the first CSI together with the channel power and the first interference power. The first resource is used for measuring interference from a cell other than the serving cell.

[0133] The third interference power can represent interference from a cell other than the serving cell. Typically, the first resource is an interference measurement resource.

[0134] In the case of measuring the third interference power, the first CSI is determined based at least on the channel power, the first interference power and the third interference power.

[0135] In the embodiments of the present application, the determination method of the first CSI includes one of the following:

[0136] The determination method 1 is based on the channel power and the first interference power;

[0137] The determination method 2 is based on the channel power, the first interference power and the second interference power;

[0138] The determination method 3 is based on the channel power, the first interference power and the third interference power;

[0139] The determination method 4 is based on the channel power, the first interference power, the second interference power and the third interference power.

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

[0141] Information 1: a quantized value of a first signal-to-interference-and-noise ratio (SINR), the first SINR being an SINR under the assumption of demodulation reference signal (DMRS) and data superposition transmission;

[0142] Information 2, a recommended DMRS power ratio or a data power ratio, the DMRS power ratio being a power ratio of DMRS on a second resource, the data power ratio being a power ratio of data on the second resource, the second resource being a resource of DMRS and data superposition transmission;

[0143] Information 3, second channel information based on DMRS and data superposition transmission assumption.

[0144] For information 1, a quantized value of SINR under DMRS and data superposition transmission assumption. 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 embodiment of the application, the first SINR can be the SINR of DMRS under DMRS and data superposition transmission assumption, or the SINR of data under DMRS and data superposition transmission assumption.

[0146] If the terminal device calculates the first SINR based on a group of second coefficient groups, one first SINR is obtained, if the terminal device calculates the first SINR based on multiple groups of second coefficient groups, multiple first SINRs are obtained.

[0147] When the terminal device reports the quantized values of multiple first SINRs, the terminal device can report the quantized values of multiple first SINRs themselves, or report the difference between the quantized values of first SINRs, that is, report in a differential manner.

[0148] After the network device receives the quantized value of the first SINR reported by the terminal device, the network device can determine the DMRS power ratio or the data power ratio under DMRS and data superposition transmission assumption based on the quantized value of the first SINR reported by the terminal device, the DMRS power ratio being a power ratio of DMRS on a second resource, the data power ratio being a power ratio of data on the second resource, the second resource being a resource of DMRS and data superposition transmission. The network device controls the power ratio of DMRS or data when DMRS and data are superimposed and transmitted based on the determined DMRS power ratio or data power ratio under DMRS and data superposition transmission assumption, thereby controlling downlink transmission.

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

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

[0151] For the information 3, it can be understood as the channel information reported by the terminal device to the network device under the assumption of DMRS and data superposition transmission, the information included in the channel information can be the same as the type of CSI in the prior art, which can enable the network device to control the rate of downlink transmission based on the second channel information.

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

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

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

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

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

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

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

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

[0160] In some embodiments, if the first CSI includes the quantized value of the first SINR and / or the recommended 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 recommended DMRS power ratio, the first coefficient for determining the signal power can be the DMRS power ratio, and the second coefficient for determining the first interference power is 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] It can be understood that the first coefficient is the data power ratio, and the second coefficient is the DMRS power ratio, the signal power determined based on the first coefficient is the power of data under the assumption of superposition 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 superposition transmission of DMRS and data, that is, data is taken as a signal part, and DMRS is taken as an interference part.

[0163] In some embodiments, if the first CSI includes a quantized value of the first SINR, and / or the recommended 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 data.

[0164] If the first CSI includes one or more of the quantized value of the SINR on data, the recommended data power ratio, and the second channel information, 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] It can be understood that the first coefficient is the data power ratio, and the second coefficient is the DMRS power ratio, the signal power determined based on the first coefficient is the power of data under the assumption of superposition 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 superposition transmission of DMRS and data, that is, data is taken as a signal part, and DMRS is taken as an 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 determines the first SINR by taking the channel power as a signal and at least the first interference power as interference; and the terminal device determines a quantized value of the first SINR.

[0168] In the embodiments of the present application, the determination manner of the first CSI includes one of determination manner 1 to determination manner 4, and the first CSI includes a quantized value of the first SINR, the determination manner of the first SINR includes one of determination manner 1 to determination manner 4, and the terminal device quantizes the first SINR after determining the first SINR to obtain the quantized value of the first SINR.

[0169] If the first SINR is determined by determination manner 1, the first SINR can be represented as wherein P0 is the channel power, P1 is the first interference power, P N to estimate the noise power.

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

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

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

[0173] It can be understood that if the first coefficient is a DMRS power ratio and the second coefficient is a data power ratio, P0 is the power of DMRS calculated based on the first coefficient, P1 is the power of data calculated based on the second coefficient, then the first SINR is the SINR on the DMRS. If the first coefficient is a data power ratio and the second coefficient is a DMRS power ratio, P0 is the power of data calculated based on the first coefficient, P1 is the power of DMRS calculated based on the second coefficient, then the first SINR is the SINR on the data.

[0174] In the embodiments of the present application, the terminal device reports the information of the first SINR on the DMRS port based on the power ratios indicated by the first coefficient and the second coefficient, so that the network device can determine reasonable power ratios for superimposed transmission of the downlink according to the reported information of the first SINR.

[0175] In some embodiments, if the first CSI includes the second channel information, the terminal device determines the second channel information based on at least 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, wherein the measured interference power can include the second interference power and / or the third interference power in addition to the first interference power. After determining the second channel information, the terminal device reports the second channel information to the network device.

[0177] In the embodiments of the present application, the network device can determine the scheduling information of the downlink, such as the precoding matrix, the number of transmission layers, the MCS, etc., based on the second channel information reported by the terminal device, so as to control the downlink transmission and improve the transmission rate of the downlink.

[0178] In some embodiments, if the first CSI includes the recommended 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 recommended DMRS power ratio or data power ratio.

[0180] If the terminal device determines the recommended DMRS power ratio or data power ratio based at least on the channel power and the first interference power, the second channel information can be determined based on the recommended DMRS power ratio or data power ratio.

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

[0182] The terminal device takes the recommended DMRS power ratio as a second coefficient, takes the data power ratio determined based on the recommended DMRS power ratio as a first coefficient, respectively calculates a new first interference power and a new channel power, and thus obtains the second channel information.

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

[0184] The terminal device takes the recommended data power ratio as a first coefficient, takes the DMRS data power ratio determined based on the recommended data power ratio as a second coefficient, respectively calculates a new first interference power and a new channel power, and thus obtains the second channel information.

[0185] In the embodiments of the present application, the sum of the DMRS power and the data power is constant, that is, the sum of the data power ratio and the DMRS power ratio is constant, and thus one of the data power ratio and the DMRS power ratio can be determined based on the other.

[0186] In the embodiments of the present application, after the terminal device determines the recommended DMRS power ratio or data power ratio and the second channel information, the terminal device reports the recommended DMRS power ratio or data power ratio and the second channel information to the network device. On the one hand, the terminal device reports the second channel information based on the superposition transmission assumption and the certain power allocation assumption, so that the network device can obtain accurate CSI for downlink transmission when using the corresponding power allocation, thereby improving the transmission rate of the downlink. On the other hand, since the terminal device can report the recommended power ratio and the corresponding CSI at the same time, the network device can more reasonably determine the power ratio of the DMRS and the data, and use the optimal power ratio and the corresponding CSI for downlink transmission.

[0187] In some embodiments, the recommended 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 to the terminal device by the network device or agreed between the terminal device and the network device.

[0188] It can be understood that the recommended DMRS power ratio is one of a plurality of first DMRS power ratios, which are indicated to the terminal device by the network device or agreed between the terminal device and the network device.

[0189] It can be understood that the recommended data power ratio is one of a plurality of first data power ratios, which are indicated to the terminal device by the network device or agreed between the terminal device and the network device.

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

[0191] In some embodiments, the recommended DMRS power ratio or data power ratio is the minimum DMRS power ratio or the maximum data power ratio in one or more second power ratios, which are power ratios meeting the target SINR requirement in the plurality of first power ratios.

[0192] It can be understood that the recommended DMRS power ratio is the minimum DMRS power ratio in one or more second DMRS power ratios. Wherein the one or more second DMRS power ratios are DMRS power ratios meeting the target SINR requirement in the plurality of first DMRS power ratios.

[0193] It can be understood that the recommended data power ratio is the maximum data power ratio in one or more second data power ratios. Wherein the one or more second data power ratios are data power ratios meeting the target SINR requirement in the plurality of first data power ratios.

[0194] In the embodiments of the present application, the target SINR is configured to the terminal device by the network device, or determined by the terminal device according to its own capability. For example, the terminal device can determine the SINR threshold that can meet the basic channel estimation performance requirement or demodulation requirement as the target SINR according to its own detection capability.

[0195] In some embodiments, if the first CSI comprises the recommended 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, comprising:

[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 from the plurality of first power ratios, corresponding to which the second SINR meets the target SINR requirement;

[0198] The terminal device takes the minimum DMRS power ratio or the maximum data power ratio from the one or more second power ratios as the recommended DMRS power ratio or data power ratio.

[0199] It can be understood that if the first CSI comprises 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 from the plurality of first DMRS power ratios, corresponding to which the second SINR meets the target SINR requirement; and the terminal device takes the minimum DMRS power ratio from the one or more second DMRS power ratios as the recommended 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 determined by the first DMRS power ratio (i.e., the second coefficient); 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 determined by the first DMRS power ratio (i.e., the first coefficient).

[0202] It can be understood that if the first CSI comprises the recommended 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 on at least 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 from the plurality of first data power ratios, wherein the second SINR corresponding to the one or more second data power ratios meets a target SINR requirement; and the terminal device determines the suggested data power ratio as a maximum data power ratio from the one or more second data power ratios.

[0204] The channel power and the first interference power corresponding to the first data power ratio can be understood as channel power and 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 based on 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 based on the first data power ratio.

[0205] It can be understood that the interference signal used to determine the second SINR can include a second interference power and / or a third interference power in addition to the first interference power. The determination manner of the second SINR can refer to the determination manner of the first SINR, which will not be described herein.

[0206] In the embodiments of the present application, the suggested DMRS power ratio corresponds to the minimum DMRS power ratio from the DMRS power ratios whose corresponding second SINRs are higher than the target SINR, and the suggested data power corresponds to the maximum data power ratio from the data power ratios whose corresponding second SINRs are higher than the target SINR, which indicates the lowest DMRS power that can meet the target SINR requirement.

[0207] In some embodiments, the first reference signal is DMRS or precoded channel state information reference signal (CSI-RS), and the second reference signal is DMRS or precoded CSI-RS.

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

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

[0210] In an example, the first reference signal is precoded CSI-RS, and the second reference signal is DMRS.

[0211] In an 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 DMRSs on different DMRS ports, or the first reference signal and the second reference signal are CSI-RSs on different CSI-RS ports.

[0213] Taking the first reference signal and the second reference signal as DMRSs on different DMRS ports as an example, the network device can configure multiple DMRS ports, wherein one DMRS port corresponds to a signal part for measuring channel power and first interference signal power, and other DMRS ports correspond to interference parts for measuring second interference signals. Wherein, one DMRS port corresponds to a target DMRS port of the signal, and 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-RSs on different CSI-RS ports as an example, the network device can configure multiple CSI-RS resources or CSI-RS ports, wherein one CSI-RS resource or CSI-RS port corresponds to a signal part for measuring channel power and first interference signal power, and other CSI-RS resources or CSI-RS ports correspond to interference parts for measuring second interference signals, and the terminal device obtains channel power, first interference power and second interference power by measuring different CSI-RS resources or CSI-RS ports, thereby calculating the first CSI. Wherein, other CSI-RS resources or CSI-RS ports can 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 a received power of the channel.

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

[0217] In an example, the channel power can be The first interference power can be

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

[0219] In an example, for a certain DMRS port / transmission layer, the channel power can be k1w H Rw, and the first interference power can be k2w H Rw, where w is a channel eigenvector corresponding to the DMRS port / transmission layer, and w H denotes the conjugate transpose of w.

[0220] If the first channel information comprises a channel eigenvector, the channel power can be calculated based on , and the first interference power can be calculated based on .

[0221] In an example, for a certain DMRS port / transmission layer, the channel power can be k1w , and the first interference power can be k2w

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

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

[0224] In the following, the wireless communication method provided by the embodiments of the present application is described through multiple embodiments.

[0225] In the embodiments of the present application, for the terminal device side, as shown in FIG. 10, it comprises:

[0226] S1001, the terminal device performs channel measurement based on the first reference signal configured by the network device, and obtains first channel information;

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

[0228] S1003, the terminal device performs calculation and reporting of CSI based on at least the channel power and the first interference power.

[0229] Optionally, the first coefficient is informed to the terminal device by the network device, and the second coefficient is obtained according to the first coefficient; or the second coefficient is informed to the terminal device by the network device, and the first coefficient is obtained according to the second coefficient; or a combination of the first coefficient and the second coefficient is informed to the terminal device by the network device; or the first coefficient is a fixed value, and the second coefficient is informed 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 the sum of the two is 1.

[0231] Optionally, the terminal device performs measurement based on a second reference signal to obtain a second interference power, and the calculation and reporting of the CSI are performed according to 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 superposition transmission assumption, a PMI based on superposition transmission assumption, and a CQI based on superposition transmission assumption.

[0233] The terminal device calculates SINR by taking the channel power as a signal part and taking the first interference power and the second interference power as interference parts, and reports a quantized value of the SINR to the network device as CSI, or calculates an RI / PMI / CQI based on superposition transmission assumption according to the SINR and reports 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 a hypothetical DMRS power ratio, and the second coefficient is a hypothetical data power ratio.

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

[0236] Optionally, the recommended DMRS power ratio is one of candidate DMRS power ratios, and the candidate DMRS power ratios are indicated to the terminal device by the network device in advance or are predetermined by the terminal device and the network device in advance.

[0237] Optionally, the recommended DMRS power ratio is the smallest DMRS power ratio in candidate DMRS power ratios that meet a target SINR requirement, wherein the target SINR is configured to the terminal device by the network device or determined by the terminal device according to its own capability.

[0238] The CSI calculation and reporting based on the channel power and the first interference power comprises: the terminal device taking a candidate DMRS power ratio as the first coefficient and taking a residual power ratio as the second coefficient, thereby calculating the channel power and the first interference power; obtaining a SINR corresponding to each candidate DMRS power ratio respectively according to the channel power and the first interference power; and taking the minimum DMRS power ratio meeting a target SINR requirement as the recommended DMRS power ratio and reporting the recommended DMRS power ratio to the network device.

[0239] Optionally, the DMRS power ratio is a power proportion of DMRS on a resource of DMRS and data superposition transmission, and the data power ratio is a power proportion of data on the resource of DMRS and data superposition transmission.

[0240] The first reference signal is DMRS or precoded CSI-RS, and the second reference signal is DMRS or precoded 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 a channel received power.

[0243] In the embodiments of the application, for the network device side, as shown in FIG. 11, the network device comprises:

[0244] S1101, the network device indicates first configuration information, the first configuration information being used for indicating configuration of a first reference signal, the first reference signal being used for the terminal device to measure to obtain first channel information;

[0245] S1102, the network device receives 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 the first coefficient, and the first interference power is obtained based on the first channel information and the second coefficient.

[0247] Optionally, the network device indicates second configuration information, the second configuration information being used for indicating the first coefficient and / or the second coefficient, or being used for indicating candidate values of the first coefficient and / or the second coefficient.

[0248] Optionally, the second configuration information indicates a first coefficient, and the second coefficient is derived according to the first coefficient; or the second configuration information indicates a second coefficient, and the first coefficient is derived according to 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 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 the sum of the two is 1.

[0250] Optionally, the network device indicates third configuration information, and the third configuration information is used to indicate a configuration of a second reference signal, the second reference signal is used for the terminal device to measure a second interference power, and the calculation of the CSI is performed according to 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 superposition transmission assumption, a PMI based on superposition transmission assumption, and a CQI based on superposition transmission assumption.

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

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

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

[0255] Optionally, the recommended DMRS power ratio is the smallest DMRS power ratio in candidate DMRS power ratios that meets a target SINR requirement, wherein the target SINR is configured to the terminal device by the network device or determined by the terminal device according to its own capability.

[0256] The DMRS power ratio is a power ratio of DMRS on resources of DMRS and data superposition transmission, and the data power ratio is a power ratio of data on resources of DMRS and data superposition transmission.

[0257] The first reference signal is DMRS or precoded CSI-RS; and the second reference signal is DMRS or precoded 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 a received power of the channel.

[0260] The wireless communication method provided by the embodiments of the present application includes, but is not limited to, the following embodiments one to three.

[0261] Embodiment one, for DMRS SINR measurement reporting

[0262] As shown in FIG. 12, it includes:

[0263] S1201, the network device indicates first configuration information, the first configuration information is used for indicating configuration of a first reference signal.

[0264] The first configuration information can be indicated by CSI reporting configuration, which is used for indicating the first reference signal used for corresponding CSI measurement, and the first reference signal can be used to obtain first channel information.

[0265] The first reference signal is DMRS or precoded CSI-RS. If the first reference signal is DMRS, the first configuration information can indicate the corresponding DMRS port. If the first reference signal is 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, and obtains first channel information.

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

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

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

[0270] It should be noted that the first coefficient is a DMRS power ratio assumed by the terminal device, and the second coefficient is a data power ratio assumed by the terminal device; or the first coefficient is a data power ratio assumed by the terminal device, and the second coefficient is a DMRS power ratio assumed by the terminal device. The specific meanings of the first coefficient and the second coefficient can be related to the measured CSI; when the measured CSI is the SINR (or a quantized value thereof) 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 (such as RI / PMI / CQI) corresponding to the PDSCH based on the superposition transmission assumption, the first coefficient is the assumed data power ratio, and the second coefficient is the assumed DMRS power ratio.

[0271] In an implementation, the terminal device receives second configuration information indicated by the network device, and the second configuration information is used to indicate the first coefficient and / or the second coefficient, or is used to indicate candidate values of the first coefficient and / or the second coefficient.

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

[0273] Method 1: The first coefficient is notified to the terminal device by the network device (for example, indicated by the second configuration information), and the second coefficient is obtained according to the first coefficient. At this time, the first coefficient and the second coefficient are both greater than 0 and the sum of the two is 1. For example, the first coefficient indicated by the network device through the second configuration information is k1, and the second coefficient can be k2=1-k1. The value range of the first coefficient is 0-1, and the network device can use several bits to indicate several quantized values in this range, for example, the first coefficient is {0.2, 0.4, 0.6, 0.8}.

[0274] Method 2: The second coefficient is notified to the terminal device by the network device (for example, indicated by the second configuration information), and the first coefficient is obtained according to the first coefficient. At this time, the first coefficient and the second coefficient are both greater than 0 and the sum of the two is 1. For example, the second coefficient indicated by the network device through the second configuration information is k2, and 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 in this range, for example, the second coefficient is {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8}.

[0275] Manner 3, the combination of the first coefficient and the second coefficient is informed to the terminal device by the network device. For example, the network device can indicate one of the following combinations through high-layer signaling: {1, 0.5}, {1, 1}, {0.2, 0.8}, {0.4, 0.6}, {0.05, 0.95}, {0.5, 0.5}.

[0276] Manner 4, the first coefficient is a fixed value, and the second coefficient is informed to the terminal device by the network device. For example, the first coefficient takes the value of 1, and the second coefficient is indicated by the network device through the second configuration information, which is a number between 0 and 1.

[0277] The terminal device can calculate the channel power and the first interference power in the following manners:

[0278] Power calculation manner 1, assuming that the first channel information is a channel matrix H, the first coefficient is k1, and the second coefficient is k2, the channel power can be calculated according to and H, and the first interference power can be calculated according to and H. For example, the channel power can be and the first interference power can be

[0279] Power calculation manner 2, assuming that the first channel information is a channel covariance matrix R, the first coefficient is k1, and the second coefficient is k2, the channel power can be calculated according to k1 and R, and the first interference power can be calculated according to k2 and R. For example, for a certain DMRS port / transmission layer, the channel power can be k1w H Rw, and the first interference power can be k2w H Rw, where w is the channel eigenvector corresponding to the DMRS port / transmission layer.

[0280] Power calculation manner 3, assuming that the first channel information is a channel eigenvector w, the first coefficient is k1, and the second coefficient is k2, the channel power can be calculated according to and w, and the first interference power can be calculated according to and w. For example, for a certain DMRS port / transmission layer, the channel power can be and the first interference power can be where R is a channel covariance matrix.

[0281] Power calculation mode 4, assuming that the first channel information is the received power P of the channel, the first coefficient is k1, and the second coefficient is k2, the channel power can be calculated according to k1 and P, and the first interference power can be calculated according to 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 the 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, the third configuration information being used to indicate the configuration of a second reference signal, the second reference signal being used for the terminal device to measure a second interference power. Further, the terminal device calculates the quantized value of the SINR according to the channel power, the first interference power, and the second interference power.

[0284] The second reference signal can be a DMRS or a precoded CSI-RS.

[0285] In an implementation, the first reference signal and the second reference signal are DMRSs on different DMRS ports. For example, the network device can configure multiple DMRS ports, one of which corresponds to a signal part, and the others correspond to interference parts. The terminal device obtains the channel power and the interference power by measuring different DMRS ports, respectively, so as to calculate the CSI. Among them, one DMRS port corresponds to a target DMRS port of the signal, and 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.

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

[0287] The terminal device can use the following method to calculate the SINR and report the quantization:

[0288] Calculation mode 1, the terminal device takes the channel power as the signal part and the first interference power as the interference part, so as to calculate the SINR; and reports the quantized value of the SINR 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 The SINR can be expressed as The SINR can be calculated and reported for each DMRS port respectively, or only the SINR of a specified DMRS port can be calculated and reported.

[0290] In the second calculation method, the terminal device calculates the SINR by taking the channel power as the signal part and the first and second interference powers as the interference part, and reports the quantized value of the SINR to the network device.

[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 The SINR can be expressed as The SINR can be calculated and reported for each DMRS port respectively, or only the SINR of a specified DMRS port can be calculated and reported.

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

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

[0294] If the CSI contains the quantized value of the SINR, the network device can determine the SINR on the DMRS port according to the quantized value, and thus determine the power ratio of the DMRS on the resource for the superposition transmission of the DMRS and data. The network device can cause the terminal device to report the quantized value of the SINR corresponding to multiple different power ratios (i.e., different first and second coefficients), and thus select a suitable power ratio according to the value of the SINR. For example, the minimum DMRS power ratio that meets the target SINR requirement is taken as the power ratio of the DMRS in the superposition transmission.

[0295] In the first embodiment, 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 the superposition transmission of the downlink according to the reported information.

[0296] Embodiment II: DMRS power ratio reporting

[0297] The interaction between the terminal device and the network device, as shown in FIG. 13, includes the following steps.

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

[0299] The first configuration information can be indicated by a CSI reporting configuration, which is used to indicate the first reference signal used for corresponding CSI measurement. The first reference signal can be used to obtain first channel information.

[0300] The first reference signal is DMRS or precoded CSI-RS. If the first reference signal is DMRS, the first configuration information can indicate the corresponding DMRS port. If the first reference signal is 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, and obtains first channel information.

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

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

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

[0305] In an embodiment, the terminal device receives second configuration information indicated by the network device, which is used to indicate the first coefficient and / or the second coefficient, or is used 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 the embodiment of the present application, it is assumed that the sum of the DMRS power ratio and the data power ratio is 1, so that the effect is the same no matter which candidate value is indicated. Hereinafter, only the case where the second configuration information of the network device indicates the candidate value of the DMRS power ratio (also referred to as the candidate DMRS power ratio) is described.

[0307] The way in which the terminal device calculates the channel power and the first interference power can refer to the description of S1203 in Embodiment I.

[0308] S1304, the terminal device performs calculation and reporting of 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, the third configuration information being used to indicate configuration of a second reference signal, the second reference signal being used for the terminal device to measure a second interference power. Further, the terminal device performs calculation of 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 a DMRS or a precoded CSI-RS.

[0311] In some embodiments, the first reference signal and the second reference signal are different CSI-RS resources or CSI-RS ports. For example, the network device can configure multiple CSI-RS resources or CSI-RS ports, one of which corresponds to a signal part and the others correspond to interference parts, and the terminal device obtains the channel power and the interference power by measuring different CSI-RS resources or CSI-RS ports respectively, so as to calculate the CSI. The other CSI-RS resources or CSI-RS ports can correspond to interference from other data transmission layers of the terminal device or interference from other users occupying the same resources.

[0312] In some embodiments, the terminal device receives fourth configuration information indicated by the network device, the fourth configuration information being used to indicate an interference measurement resource, the interference measurement resource being used for the terminal device to measure a third interference power. Further, the terminal device performs calculation of 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 a serving cell.

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

[0314] The candidate DMRS power ratios are indicated by the network device to the terminal device in advance through second configuration information. Alternatively, the candidate DMRS power ratios can also be agreed by the network device and the terminal device in advance, for example, the values 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 minimum DMRS power ratio in the candidate DMRS power ratios that meets the target SINR requirement. The target SINR is configured by the network device to the terminal device or determined by the terminal device according to its own capability. For example, the terminal device can determine the SINR threshold that can meet the basic channel estimation performance requirement or demodulation requirement as the target SINR according to its own detection capability.

[0316] The terminal device takes the candidate DMRS power ratio as the first coefficient and takes 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 refer to the description of Embodiment One. Further, the terminal device obtains the SINR corresponding to each candidate DMRS power ratio according to the channel power and the first interference power. In this step, the interference part can include the second interference power and / or the third interference power in addition to the first interference power. The specific SINR calculation method can refer to the description in Embodiment One. After obtaining the SINR corresponding to each candidate DMRS power ratio, the terminal device reports the minimum DMRS power ratio that meets the target SINR requirement to the network device as the recommended DMRS power ratio. That is, the recommended DMRS power ratio is the minimum power ratio in the power ratios corresponding to the SINR higher than the target SINR, which represents 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] The network device can determine the respective transmission powers of the DMRS and the data on the superimposed transmission physical resource according to the DMRS power ratio reported by the terminal device.

[0319] In Embodiment Two, the terminal device can report the recommended DMRS or data power ratio, so that the network device can reasonably allocate the power between the DMRS and the data, and increase the transmission power of the data as much as possible under the premise of ensuring the channel estimation performance.

[0320] Embodiment Three, CSI measurement and reporting for data

[0321] As shown in FIG. 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 indicated by a CSI reporting configuration, and is used to indicate a first reference signal used for corresponding CSI measurement, and the first reference signal can be used to obtain first channel information.

[0324] The first reference signal is DMRS or precoded CSI-RS. If the first reference signal is DMRS, the first configuration information can indicate a corresponding DMRS port. If the first reference signal is CSI-RS, the first configuration information can indicate a 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, and obtains first channel information.

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

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

[0328] In the embodiment of the application, the measured CSI includes CSI (such as RI / PMI / CQI) corresponding to PDSCH based on superposition transmission assumption, at this time, the first coefficient is a data power ratio assumed by the terminal device, and the second coefficient is a DMRS power ratio assumed by the terminal device. Wherein, the DMRS power ratio is the power ratio of DMRS on the resource of DMRS and data superposition transmission, and the data power ratio is the power ratio of data on the resource of DMRS and data superposition transmission.

[0329] In an embodiment, the terminal device receives second configuration information indicated by the network device, and the second configuration information is used to indicate the first coefficient and / or the second coefficient, or is used to indicate candidate values of the first coefficient and / or the second coefficient. That is, the second configuration information is used to indicate the data power ratio and / or the data power ratio, or to indicate candidate values thereof.

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

[0331] The method for the terminal device to obtain the first coefficient and the second coefficient, and the way to calculate the channel power and the first interference power, can refer to the description in Embodiment I.

[0332] In S1404, the terminal device performs calculation and reporting of CSI corresponding to the PDSCH under the superposition transmission assumption based on the channel power and the first interference power.

[0333] Optionally, the terminal device can perform interference measurement according to the second reference signal and / or the interference measurement resource configured by the network device, so as to obtain the second interference power and / or the third interference power, which are used as the interference part together with the first interference power for calculating the SINR / CSI. The method for the terminal device to calculate the SINR can refer to the description in Embodiment I.

[0334] In one case, the CSI contains at least one of the recommended DMRS power ratio, the RI under the superposition transmission assumption, the PMI under the superposition transmission assumption, and the CQI under the superposition transmission assumption. The recommended DMRS power ratio can also be replaced by the recommended data power ratio. Since the sum of the two, i.e., the total power assumption, is constant, the effect of which power ratio the terminal reports is the same. The CSI contains the RI under the superposition transmission assumption, the PMI under the superposition transmission assumption, and the CQI under the superposition 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 them to the network device.

[0335] In one case, the CSI contains the recommended DMRS power ratio, the RI under the superposition transmission assumption, the PMI under the superposition transmission assumption, and the CQI under the superposition transmission assumption.

[0336] The recommended DMRS power ratio (as mentioned before, it can also be the data power ratio) is one of the candidate DMRS power ratios. The candidate DMRS power ratios are indicated to the terminal device by the network device in advance through the second configuration information; or, the candidate DMRS power ratios can also be agreed by the network device and the terminal device in advance. One implementation manner of determining the recommended DMRS power ratio can refer to the description in Embodiment II.

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

[0338] In S1405, the network device receives the CSI reported by the terminal device.

[0339] The network device can determine the respective transmission powers of the DMRS and the data on the physical resources of the superposition transmission according to the DMRS power ratio reported by the terminal device. Meanwhile, the network device can also determine the scheduling information of the downlink (such as the precoding matrix, the number of transmission layers, and the MCS) based on the RI / PMI / CQI reported by the terminal device.

[0340] In the second embodiment, the terminal device can report the CSI based on the superposition transmission assumption and the certain power allocation assumption, so that the network device can obtain accurate CSI for downlink transmission when using the corresponding power allocation, thereby improving the transmission rate of the downlink. On the other hand, since the terminal device can report the recommended power ratio and the corresponding CSI at the same time, the network device can more reasonably determine the power ratio of the DMRS and the data, and use the optimal power ratio and the corresponding CSI for downlink transmission.

[0341] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present application within the scope of the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

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

[0343] The first communication unit 1501 is configured to receive first configuration information, where the first configuration information is 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 determination unit 1503 is configured to determine channel power based on the first channel information and a first coefficient, and determine first interference power based on the first channel information and a second coefficient.

[0346] The second determining unit 1504 is configured to determine first channel state information (CSI) based on at least 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 sets, the first coefficient set 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 according to the first coefficient; or

[0350] The second coefficient is indicated by the second configuration information, and the first coefficient is determined according to 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 a second reference signal to obtain a second interference power, the second interference power being used to determine the first CSI based on at least 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-and-noise ratio (SINR), the first SINR being an SINR under a demodulation reference signal (DMRS) and data superposition transmission assumption;

[0357] a recommended DMRS power ratio or data power ratio, the DMRS power ratio being a power ratio of DMRS on a second resource, and the data power ratio being a power ratio of data on the second resource, the second resource being a resource of DMRS and data superposition transmission;

[0358] second channel information based on DMRS and data superposition transmission assumption.

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

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

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

[0362] determine the first SINR if the first CSI comprises a quantized value of the first SINR, taking the channel power as a signal and at least the first interference power as interference;

[0363] determine the quantized value of the first SINR.

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

[0365] determine the second channel information based on the suggested DMRS power ratio or data power ratio if the first CSI comprises the suggested DMRS power ratio or data power ratio, the suggested DMRS power ratio or data power ratio being determined based at least on the channel power and the first interference power.

[0366] In some embodiments, the second channel information comprises one or more of the following information: rank indication (RI), precoder matrix indication (PMI), channel quality information (CQI).

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

[0368] In some embodiments, the suggested DMRS power ratio or data power ratio is a minimum DMRS power ratio or a maximum data power ratio of one or more second power ratios, the one or more second power ratios being power ratios in the plurality of first power ratios that satisfy a target SINR requirement.

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

[0370] determine one or more second power ratios from the plurality of first power ratios, for which the corresponding second SINRs satisfy a target SINR requirement;

[0371] select, as the recommended DMRS power ratio or data power ratio, the minimum DMRS power ratio or the maximum data power ratio from the one or more second power ratios.

[0372] In some embodiments, the first reference signal is a DMRS or a precoded channel state information reference signal (CSI-RS), and 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 DMRSs on different DMRS ports, or the first reference signal and the second reference signal are CSI-RSs 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 a received power of a channel.

[0375] It can be understood that the first communication unit, the first measurement unit, the first determining unit, the second determining unit, and the second measurement unit in the terminal device can be implemented by a transceiver and a processor in the terminal device.

[0376] FIG. 16 is a structural composition diagram of a network device according to an embodiment of the present application. As shown in FIG. 16, the network device 1600 includes:

[0377] a second communication unit 1601 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 a 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 based at least on a channel power and a first interference power, the channel power being determined based on the first channel information and a first coefficient, and the first interference power being determined 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 the first coefficient and / or the second coefficient, and / or the second configuration information being used to indicate a plurality of first coefficient sets, the first coefficient set 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 according to the first coefficient; or the second coefficient is indicated by the second configuration information, and the first coefficient is determined according to 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 based at least on a channel power and a first interference power and a second interference power, the second interference power being obtained by the terminal device performing channel measurement on a second reference signal.

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

[0384] a quantized value of a first signal-to-interference-and-noise ratio (SINR), the first SINR being an SINR under an assumption of DMRS and data superposition transmission;

[0385] a recommended DMRS power ratio or a recommended data power ratio, the DMRS power ratio being a power proportion of DMRS on a second resource, the data power ratio being a power proportion of data on the second resource, the second resource being a resource of DMRS and data superposition transmission;

[0386] second channel information under an assumption of DMRS and data superposition transmission.

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

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

[0389] In some embodiments, the second channel information comprises one or more of the following: rank indication (RI), precoder matrix indication (PMI), channel quality information (CQI).

[0390] In some embodiments, the suggested DMRS power ratio or data power ratio is one of a plurality of first power ratios, the plurality of first power ratios being 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 suggested DMRS power ratio or data power ratio is one of a plurality of first power ratios, the plurality of first power ratios being 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.

[0392] In some embodiments, the first reference signal is a DMRS or a precoded channel state information reference signal (CSI-RS), and 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 DMRSs on different DMRS ports, or the first reference signal and the second reference signal are CSI-RSs on different CSI-RS ports.

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

[0395] The second communication unit in the network device can be implemented by a transceiver in the network device. It can be understood that the network device can further 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 above description of the terminal device or the network device of the embodiments of the present application can be understood with reference to the description of the wireless communication method of the embodiments of the present application.

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

[0398] Optionally, as shown in FIG. 17, the communication device 1700 can further include a memory 1720. The processor 1710 can invoke and run a computer program from the memory 1720 to implement the method in the embodiments of the present application.

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

[0400] Optionally, as shown in FIG. 17, the communication device 1700 can further include a transceiver 1730, and the processor 1710 can control the transceiver 1730 to communicate with other devices, specifically, send information or data to other devices, or receive information or data sent by other devices.

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

[0402] Optionally, the communication device 1700 can be specifically a network device of the embodiments of the present application, and the communication device 1700 can implement the corresponding processes in the various methods of the embodiments of the present application implemented by the network device. For the sake of brevity, details are not described herein.

[0403] Optionally, the communication device 1700 can be specifically a mobile terminal / terminal device of the embodiments of the present application, and the communication device 1400 can implement the corresponding processes in the various methods of the embodiments of the present application implemented by the mobile terminal / terminal device. For the sake of brevity, details are not described herein.

[0404] FIG. 18 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1800 shown in FIG. 18 includes a processor 1810, which can invoke and run a computer program from a memory to implement the method in the embodiments of the present application.

[0405] Optionally, as shown in FIG. 18, the chip 1800 can further include a memory 1820. The processor 1810 can invoke and run a computer program from the memory 1820 to implement the method in the embodiments of the present application.

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

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

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

[0409] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding procedures realized by the network device in various methods of the embodiments of the present application. For brevity, details are not described herein.

[0410] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding procedures realized by the mobile terminal / terminal device in various methods of the embodiments of the present application. For brevity, details are not described herein.

[0411] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system-level chip, a system chip, a chip system, or a system-on-chip chip, etc.

[0412] FIG. 19 is a schematic block diagram of a communication system 1900 provided by the embodiments of the present application. As shown in FIG. 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 realized by the terminal device in the above methods, and the network device 1920 can be used to implement the corresponding functions realized by the network device in the above methods. For brevity, details are not described herein.

[0414] It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip with a processing capability of signals. In the implementation process, each step of the method embodiments described above can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or can be executed by a combination of hardware and software modules in the code processor. The software module can be located in a random memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the above method.

[0415] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (Random Access Memory, RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0416] It should be understood that the above-mentioned memory is exemplary but not limiting, for example, the memory in the embodiments of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and the like. That is, the memory in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.

[0417] The embodiment of the present application further provides a computer readable storage medium for storing the computer program.

[0418] Optionally, the computer readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0419] Optionally, the computer readable storage medium can be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0420] The embodiment of the present application further provides a computer program product comprising computer program instructions.

[0421] Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0422] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0423] The embodiment of the present application further provides a computer program.

[0424] Optionally, the computer program can be applied to the network device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0425] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0426] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized 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 realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0427] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0428] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope of the claims.

Claims

1. A method of wireless communication, the method comprising: receiving, by a terminal device, first configuration information, the first configuration information being used for configuring a first reference signal; performing, by the terminal device, channel measurement based on the first reference signal to obtain first channel information; determining, by the terminal device, a channel power based on the first channel information and a first coefficient, and determining a first interference power based on the first channel information and a second coefficient; determining, by the terminal device, first channel state information (CSI) based on at least the channel power and the first interference power.

2. The method of claim 1, wherein, The method further comprises: receiving, by the terminal device, second configuration information, the second configuration information being used for indicating the first coefficient and / or the second coefficient, and / or, the second configuration information being used for indicating a plurality of first coefficient sets, the first coefficient set including the first coefficient and / or the second coefficient. 3.The method of claim 2, wherein: the first coefficient is indicated by the second configuration information, and the second coefficient is determined according to the first coefficient; or, the second coefficient is indicated by the second configuration information, and the first coefficient is determined according to 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 comprises: performing, by the terminal device, channel measurement based on a second reference signal to obtain a second interference power, the second interference power being used for determining the first CSI based on at least the channel power, the first interference power and the second interference power.

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

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

8. The method of claim 6, wherein, If the first CSI includes the quantized value of the first SINR, and / or, the recommended data power ratio, and / or, the second channel information, the first coefficient is a data power ratio, and the second coefficient is a 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, determining, by the terminal device, the first CSI based on at least the channel power and the first interference power comprises: The terminal device determines the first SINR based on the channel power and the first interference power as a signal and at least the first interference power as interference. The terminal device determines a quantized value of the first SINR.

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

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

12. The method according to any one of claims 6 to 11, wherein, The recommended 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 by the terminal device and the network device.

13. The method of claim 12, wherein, The recommended DMRS power ratio or data power ratio is the minimum DMRS power ratio or the maximum data power ratio of one or more second power ratios that satisfy a target SINR requirement among the plurality of first power ratios.

14. The method of claim 13, wherein, If the first CSI includes the recommended DMRS power ratio or data power ratio, the terminal device determines the first CSI based on at least the channel power and the first interference power. For each of the plurality of first power ratios, the terminal device determines a second SINR corresponding to the first power ratio based on at least 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 that satisfy a target SINR requirement among the plurality of first power ratios based on the corresponding second SINRs. The terminal device determines the minimum DMRS power ratio or the maximum data power ratio of the one or more second power ratios as the recommended DMRS power ratio or data power ratio.

15. The method of any one of claims 1 to 14, wherein, The first reference signal is a DMRS or a precoded channel state information reference signal (CSI-RS), and the second reference signal is a DMRS or a precoded CSI-RS.

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

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

18. A method of wireless communication, the method comprising: The network device sends first configuration information, the first configuration information is used for configuring a first reference signal, the first reference signal is used for the terminal device to perform channel measurement to obtain first channel information; The network device receives first channel state information (CSI), the first CSI is determined based on at least 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 of claim 18, wherein, The method further comprises: The network device sends second configuration information, the second configuration information is used for indicating the first coefficient and / or the second coefficient, and / or, the second configuration information is used for indicating a plurality of first coefficient sets, the first coefficient set includes the first coefficient and / or the second coefficient.

20. The method of claim 19, wherein, The first coefficient is indicated by the second configuration information, and the second coefficient is determined according to the first coefficient; or, The second coefficient is indicated by the second configuration information, and the first coefficient is determined according to 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 of 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 of any one of claims 18 to 21, wherein, The first CSI is determined based on at least channel power and first interference power, and second interference power, the second interference power being obtained by the terminal device performing channel measurement on a second reference signal.

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

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

25. The method of claim 31, wherein, If the first CSI includes the quantized value of the first SINR, and / or, the recommended 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 of claim 23 or 25, wherein, The second channel information includes one or more of the following information: rank indication (RI), precoder matrix indication (PMI), and channel quality information (CQI).

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

28. The method of claim 27, wherein, The recommended DMRS power ratio or data power ratio is a minimum DMRS power ratio or a maximum data power ratio of one or more second power ratios, the one or more second power ratios being power ratios of the plurality of first power ratios that satisfy a target SINR requirement.

29. The method of any one of claims 18 to 28, wherein, The first reference signal is a DMRS or a precoded channel state information reference signal (CSI-RS), and the second reference signal is a DMRS or a precoded CSI-RS.

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

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

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

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

34. A terminal device comprising: a transceiver, a processor, and a memory, the memory being used to store a computer program, the processor being used to invoke and run the computer program stored in the memory to perform the method of any one of claims 1 to 17 in cooperation with the transceiver.

35. A network device comprising: a transceiver, a processor, and a memory, the memory being used to store a computer program, the processor being used to invoke and run the computer program stored in the memory to perform the method of any one of claims 18 to 31 in cooperation with the transceiver.

36. A chip comprising: a processor for calling and running a computer program from a memory such that a device in which the chip is installed performs the method according to any one of claims 1 to 17, or performs the method according to any one of claims 18 to 31.

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

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

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

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