Communication method and apparatus

Abstract

Disclosed in the present application are a communication method and apparatus. The method comprises: acquiring first information, which comprises a first reference signal density and / or a first feedback dimension; and sending first indication information, which is used for indicating first offset information of the first information, wherein the first offset information of the first information is related to a multipath component of the first device, and the first information and the first offset information of the first information are associated with a measurement configuration of a reference signal. The method can reduce overheads incurred by channel measurement and feedback.

Description

Communication method and apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411171633.9, filed on August 23, 2024, entitled "Communication method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of communication technology, in particular to a communication method and apparatus. BACKGROUND

[0003] In the existing communication system, the gain of large-scale multi-input and multi-output (MIMO) is established on the premise that the base station can accurately obtain the channel state information (CSI), and the acquisition of the CSI involves the process of channel measurement and feedback. Sparse measurement of the channel can measure the channel by utilizing the sparsity of the channel in the time, frequency and spatial domains.

[0004] Currently, the projection operator is usually used to complete the sparse measurement of the channel. For example, by performing high-order singular value (HOSVD) decomposition on the channel, the sparsity of each dimension (frequency domain, time domain, antenna, etc.) is analyzed; or by performing singular value (SVD) decomposition on the second-order correlation matrix of the channel, the sparsity of multiple dimensions is obtained, and then the sparse measurement of the channel can be realized by utilizing the sparsity. However, the above method has a large overhead of calculating the projection operator when the dimension of the channel is too large, and the overhead of channel measurement and feedback is large. SUMMARY

[0005] The present application discloses a communication method and apparatus, which can reduce the overhead of channel measurement and feedback.

[0006] The present application will be described from different aspects below. It should be understood that the implementation and advantages of the different aspects below can be mutually referred to.

[0007] In a first aspect, a communication method is disclosed, which can be applied to a first communication device, which can be a communication apparatus (e.g., a terminal device or a network device), or a component (e.g., a chip or a chip system or a circuit or a communication module) of a communication apparatus. The method can include: obtaining first information, the first information including a first reference signal density and / or a first feedback dimension; and transmitting first indication information, the first indication information being used to indicate first bias information of the first information, the first bias information of the first information being related to a multipath component (MPC) of the first device; the first information and the first bias information of the first information being associated with a measurement configuration of a reference signal.

[0008] Optionally, the first device can be a first communication device or a communication device (which can be referred to as a second communication device) receiving the first indication information, i.e., the MPC of the first device can be an MPC of the first communication device or an MPC of the second communication device. For example, the first device and the first communication device are the same terminal, and the MPC of the first device is the MPC of the terminal. For another example, the first device and the second communication device are the same terminal, and the MPC of the first device is the MPC of the terminal.

[0009] In the embodiments of the present application, the bias information of the first information is related to the MPC of the first device, and the first information and the bias information of the first information are associated with the measurement configuration of the reference signal. Therefore, the method can effectively adjust the measurement configuration of the reference signal used in the channel measurement and feedback process by using the MPC of the first device, which can improve the robustness of the channel measurement and feedback under non-ideal factors, and reduce the signaling overhead and computational overhead of the channel measurement and feedback. In addition, the method effectively utilizes the MPC for channel measurement and estimation, and can reduce the computational complexity and the overhead of the channel measurement and feedback without decomposing the channel or the channel matrix.

[0010] In combination with the first aspect, in a possible implementation, the first bias information of the first information is further related to a performance requirement.

[0011] In the embodiments of the present application, the first bias information of the first information can be flexibly adjusted according to different performance requirements, so that the performance of the channel estimation and feedback under non-ideal factors can meet the performance requirements, the robustness of the channel measurement and feedback can be improved, and the computational overhead can be reduced.

[0012] In a possible implementation manner of the first aspect, the first bias information of the first information comprises bias information of the first reference signal density; the method further comprises: performing performance testing based on the MPC and the first reference signal density to obtain a performance testing result corresponding to the first reference signal density; and determining the bias information of the first reference signal density based on the performance testing result corresponding to the first reference signal density and the performance requirement.

[0013] In the embodiments of the present application, the bias information of the first reference signal density is determined based on the performance testing result corresponding to the first reference signal density and the performance requirement, so that the performance of channel estimation using the bias information of the first reference signal density can meet the performance requirement, and the efficiency and quality of channel estimation are improved.

[0014] In a possible implementation manner of the first aspect, the first bias information of the first information comprises bias information of the first feedback dimension; the method further comprises: performing performance testing based on the MPC and the first feedback dimension to obtain a performance testing result corresponding to the first feedback dimension; and determining the bias information of the first feedback dimension based on the performance testing result corresponding to the first feedback dimension and the performance requirement.

[0015] In the embodiments of the present application, the bias information of the first feedback dimension is determined based on the performance testing result corresponding to the first feedback dimension and the performance requirement, so that the performance of channel feedback using the bias information of the first feedback dimension can meet the performance requirement, and the efficiency and quality of channel feedback are improved.

[0016] In a possible implementation manner of the first aspect, the method further comprises: sending or receiving second indication information, the second indication information being used to indicate that the first bias information of the first information is determined based on second information, and the second information comprising the performance requirement.

[0017] In a possible implementation manner of the first aspect, the method further comprises: obtaining third information, the third information comprising a signal to noise ratio (SNR) and / or a signal to interference noise ratio (SINR); determining a first correspondence relationship based on the MPC; and determining the bias information of the first feedback dimension based on the third information and the first correspondence relationship; the first correspondence relationship comprising a correspondence relationship between the third information and the bias information of the first feedback dimension; and / or, determining the bias information of the first reference signal density based on the third information and the first correspondence relationship; the first correspondence relationship comprising a correspondence relationship between the third information and the bias information of the first reference signal density.

[0018] In the embodiments of the present application, the first bias information of the first information (i.e., the bias information of the first feedback dimension and / or the bias information of the first reference signal density) is related to the third information (i.e., the signal-to-noise ratio and / or the signal-to-interference-plus-noise ratio), and the correspondence between the first bias information of the first information and the third information can be pre-set. The first communication device can determine the first bias information of the first information based on the third information. The method can improve the efficiency of determining the first bias information, thereby improving the efficiency of channel measurement and feedback.

[0019] In combination with the first aspect, in a possible implementation, the method further includes: sending or receiving third indication information, the third indication information being used to indicate that the first bias information of the first information is determined based on fourth information, and the fourth information includes the first correspondence.

[0020] In combination with the first aspect, in a possible implementation, the method further includes: receiving fourth indication information, the fourth indication information being used to indicate the second bias information of the first information, and the second bias information being related to the MPC; and determining the first bias information of the first information based on the second bias information.

[0021] Optionally, the first bias information can be the second bias information, or the first bias information can be obtained by adjusting the second bias information. In the method, the calculation can be performed by using the calculation resources of the opposite end (e.g., the device receiving the first indication information), and the calculation efficiency can be improved.

[0022] In combination with the first aspect, in a possible implementation, the first information and the first bias information of the first information are associated with the measurement configuration of the reference signal, and the reference signal can include the first reference signal. The method further includes: determining the pattern of the first reference signal based on the first reference signal density and the bias information of the first reference signal density; and sending fifth indication information, the fifth indication information being used to indicate the pattern of the first reference signal.

[0023] In the method, the pattern of the first reference signal is determined based on the first reference signal density and the bias information of the first reference signal density, and the bias information of the first reference signal density is related to the MPC. Compared with the pilot pattern determined in the current existing scheme, the density of the pattern of the first reference signal is relatively sparse. Based on this, sparse channel measurement can be performed, which can reduce the calculation complexity and the overhead of channel measurement, and can provide effective channel measurement and estimation.

[0024] With reference to the first aspect, in a possible implementation manner, the first information and the first bias information of the first information are associated with a measurement configuration of the reference signal, the reference signal can include a second reference signal, and the method further includes: determining a pattern of the second reference signal based on the first reference signal density; sending sixth indication information, the sixth indication information being used for indicating the pattern of the second reference signal; determining bias information of the pattern of the second reference signal based on the bias information of the first reference signal density; and sending seventh indication information, the seventh indication information being used for indicating the bias information of the pattern of the second reference signal.

[0025] In the method, the bias information of the pattern of the second reference signal is used for adjusting the pattern of the second reference signal, the density of the adjusted pattern of the second reference signal is relatively sparse, and sparse channel measurement is performed based on this, which can reduce the calculation complexity and the overhead of channel measurement, and effective channel measurement and estimation can be provided.

[0026] With reference to the first aspect, in a possible implementation manner, the method further includes: determining fifth information based on the first feedback dimension and the bias information of the first feedback dimension, the fifth information including first time-frequency resources and / or first antenna ports; and sending eighth indication information, the eighth indication information being used for indicating the fifth information.

[0027] In the method, the bias information of the first feedback dimension is related to MPC, the first time-frequency resources and / or the first antenna ports are determined based on the first feedback dimension and the bias information of the first feedback dimension, the number of the first time-frequency resources and / or the first antenna ports is low, and the overhead of channel feedback is also low.

[0028] With reference to the first aspect, in a possible implementation manner, the method further includes: determining sixth information based on the first feedback dimension, the sixth information including second time-frequency resources and / or second antenna ports; sending ninth indication information, the ninth indication information being used for indicating the sixth information; determining bias information of the sixth information based on the bias information of the first feedback dimension; and sending tenth indication information, the tenth indication information being used for indicating the bias information of the sixth information.

[0029] In the method, the bias information of the sixth information is used for adjusting the sixth information, the content of the adjusted sixth information is less, channel feedback is performed based on this, the overhead of channel feedback is low, and effective channel measurement and estimation can be provided.

[0030] In a second aspect, the present application discloses a communication method, which can be applied to a second communication device. The second communication device can be a communication equipment (such as a terminal equipment or a network equipment), or the second communication device can be a component (such as a chip or a chip system or a circuit or a communication module) in the communication equipment. The method can comprise: obtaining first information, the first information comprising a first reference signal density and / or a first feedback dimension; receiving first indication information, the first indication information being used for indicating first bias information of the first information, the first bias information of the first information being related to MPC of the first device; and the first information and the first bias information of the first information being associated with a measurement configuration of a reference signal.

[0031] With reference to the second aspect, in a possible implementation manner, the first bias information of the first information is further related to a performance requirement.

[0032] With reference to the second aspect, in a possible implementation manner, the method further comprises: sending or receiving second indication information, the second indication information being used for indicating that the first bias information of the first information is determined based on second information, the second information comprising a performance requirement.

[0033] With reference to the second aspect, in a possible implementation manner, the method further comprises: sending or receiving third indication information, the third indication information being used for indicating that the first bias information of the first information is determined based on fourth information; the fourth information comprising a first correspondence, the first correspondence being related to MPC, and the first correspondence comprising at least one of the following: a correspondence between the third information and bias information of the first feedback dimension, or a correspondence between the third information and bias information of the first reference signal density; wherein the third information comprises a signal-to-noise ratio and / or a signal-to-interference-and-noise ratio.

[0034] With reference to the second aspect, in a possible implementation manner, the method further comprises: sending fourth indication information, the fourth indication information being used for indicating second bias information of the first information, the second bias information being related to MPC.

[0035] With reference to the second aspect, in a possible implementation manner, the reference signal comprises a first reference signal, and the method further comprises: receiving fifth indication information, the fifth indication information being used for indicating a pattern of the first reference signal, the pattern of the first reference signal being related to the first reference signal density and bias information of the first reference signal density.

[0036] With reference to the second aspect, in a possible implementation manner, the reference signal includes a second reference signal, and the method further includes: receiving sixth indication information, the sixth indication information being used for indicating a pattern of the second reference signal, the pattern of the second reference signal being related to the first reference signal density; and receiving seventh indication information, the seventh indication information being used for indicating offset information of the pattern of the second reference signal, the offset information of the pattern of the second reference signal being related to the offset information of the first reference signal density.

[0037] With reference to the second aspect, in a possible implementation manner, the method further includes: receiving eighth indication information, the eighth indication information being used for indicating fifth information, the fifth information including the first time-frequency resource and / or the first antenna port, the fifth information being related to the first feedback dimension and offset information of the first feedback dimension.

[0038] With reference to the second aspect, in a possible implementation manner, the method further includes: receiving ninth indication information, the ninth indication information being used for indicating sixth information, the sixth information including the second time-frequency resource and / or the second antenna port, the sixth information being related to the first feedback dimension; and receiving tenth indication information, the tenth indication information being used for indicating offset information of the sixth information, the offset information of the sixth information being related to offset information of the first feedback dimension.

[0039] In a third aspect, the present application provides a communication apparatus, which can be the first communication apparatus. The communication apparatus is configured to perform the method in the first aspect or any possible implementation manner of the first aspect. The communication apparatus includes units configured to perform the method in the first aspect or any possible implementation manner of the first aspect.

[0040] In a fourth aspect, the present application provides a communication apparatus, which can be the second communication apparatus. The communication apparatus is configured to perform the method in the second aspect or any possible implementation manner of the second aspect. The communication apparatus includes units configured to perform the method in the second aspect or any possible implementation manner of the second aspect.

[0041] In the third aspect or the fourth aspect, the communication apparatus can include a transceiver unit and a processing unit. The specific description of the transceiver unit and the processing unit can also be referred to the apparatus embodiment shown below. The beneficial effects of the fourth aspect to the sixth aspect can be referred to the foregoing description of the first aspect to the second aspect, and will not be described here.

[0042] In a fifth aspect, the present application provides a communication device, which can include a processor and an interface circuit, which are connected. The interface circuit is configured to interact (or transceive or input and output) information or data, and the processor is configured to run program instructions, so that the communication device performs the method described in the first aspect, or the second aspect or any possible implementation manner of any of the aspects.

[0043] In a sixth aspect, the present application provides a readable storage medium, which stores program instructions, when the program instructions are run on a computer, the computer performs the method described in the first aspect, or the second aspect or any possible implementation manner of any of the aspects.

[0044] In a seventh aspect, the present application provides a program product including program instructions, when the program instructions are run, the method described in the first aspect, or the second aspect or any possible implementation manner of any of the aspects is performed.

[0045] In an eighth aspect, the present application provides a device, which can be implemented in the form of a chip or in the form of equipment, and the device includes a processor. The processor is configured to read and execute program stored in a memory, so as to perform the information interaction method provided in the first aspect, or one or more of the second aspects, or any possible implementation manner of any of the aspects. Optionally, the device further includes a memory, which is connected to the processor through a circuit. Further optionally, the device further includes a communication interface, which is connected to the processor. The communication interface is configured to receive information to be processed, the processor acquires the information from the communication interface, processes the information, and outputs the processing result through the communication interface. The communication interface can be an input and output interface.

[0046] In a possible implementation manner, the processor and the memory described above can be physically independent units, or the memory can be integrated with the processor.

[0047] In a ninth aspect, the present application provides a communication system, which includes a first communication device and a second communication device. The first communication device is configured to perform the method described in the first aspect or any possible implementation manner of any of the aspects, and the second communication device is configured to perform the method described in the second aspect or any possible implementation manner of any of the aspects.

[0048] The technical effects achieved by the above aspects can be mutually referred to or referred to the beneficial effects shown in the method embodiments below, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0049] Fig. 1 is a schematic diagram of radio map input and output according to an embodiment of the present application;

[0050] Fig. 2A is a schematic diagram of a communication system suitable for the communication method according to an embodiment of the present application;

[0051] Fig. 2B is a schematic diagram of another communication system suitable for the communication method according to an embodiment of the present application;

[0052] Fig. 3 is a flow diagram of a communication method according to an embodiment of the present application;

[0053] Fig. 4 is a flow diagram of another communication method according to an embodiment of the present application;

[0054] Fig. 5 is a flow diagram of yet another communication method according to an embodiment of the present application;

[0055] Fig. 6 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0056] Fig. 7 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application;

[0057] Fig. 8 is a schematic diagram of yet another structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application.

[0059] Before introducing the solutions of the present application, the following points are explained.

[0060] 1. In the description of the present application, the terms "first", "second", etc. are only used to distinguish different objects, and do not limit the quantity and execution order, and the terms "first", "second", etc. do not necessarily mean different. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device, etc. including a series of steps or units, is not limited to the listed steps or units, but can optionally include other steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device, etc.

[0061] 2. In the description of the present application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is only a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean: A alone, A and B exist at the same time, B alone, these three cases. In addition, "at least one item", "one or more items" or similar expressions mean any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c, can mean: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, c can be single or multiple.

[0062] 3. In the description of the present application, "exemplary" or "for example" and the like are used to mean an example, an instance, or an illustration. Any embodiment or design described herein as "exemplary", "for example" or "for instance" should not be construed as being superior or more advantageous than other embodiments or designs. Rather, the use of "exemplary", "for example" or "for instance" is primarily intended to present concepts in a concrete manner.

[0063] 4. It can be understood that in the description of the present application, "when", "if" and "if" refer to the corresponding processing of the device under certain objective circumstances, not the time limit, and also does not require the device to have a judgment action when it is implemented, nor does it mean that there are other limitations. Among them, the device makes corresponding processing under certain objective circumstances, including: meeting the objective situation, that is, being able to make the corresponding processing; or meeting the objective situation and other situations to make the corresponding processing.

[0064] 5. "At the same time" in the present application can be understood as at the same time point, also can be understood as in a period of time, also can be understood as in the same cycle, can be understood in combination with the context.

[0065] 6. In the present application, the element expressed by the singular is intended to represent "one or more", not "one and only one", unless otherwise specified.

[0066] 7. The terms "system" and "network" are often used interchangeably in this article.

[0067] 8. In various embodiments of the present application, "A corresponds to B", "A and B correspond", "A corresponds to B" or the like, means that B is associated with A, and B can be determined according to A. Determining B according to A does not mean that B is determined only according to A, but also can be determined according to A and / or other information.

[0068] 9、In this application, "indication" can include direct indication, indirect indication, explicit indication, implicit indication, etc. When describing that certain indication information indicates A, it can be understood that the indication information carries A, carries an identifier of A, carries B having an association relationship with A, carries an identifier of B having an association relationship with A, etc. In other words, if the receiving side of certain indication information can determine A according to the indication information, it can be described that the indication information indicates A, and the specific determination is not limited. When it is understood that the indication information carries A, "indication" can be replaced by "includes", and at this time, similar to the expression "sending / receiving indication information, the indication information indicates A", it can be replaced by "sending / receiving A".

[0069] In this application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information has an association relationship with the to-be-indicated information. The to-be-indicated information can also be indicated only by a part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending time of these sub-information can be the same or different.

[0070] 10、In this application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, and also includes indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as "output" of the chip interface, and "receiving" can also be understood as "input" of the chip interface. In other words, sending and receiving can be carried out between devices, for example, between network devices and terminal devices, or can be carried out within a device, for example, between components, between modules, between chips, between software modules or hardware modules in a device through a bus, a wire or an interface.

[0071] In order to facilitate understanding of the embodiments of the present application, first, the basic concepts involved in the present application are described.

[0072] 1、Reference signal: The reference signal involved in this application includes but is not limited to:

[0073] Pilot reference signals (e.g., channel state information-reference signals (CSI-RSs) and / or sounding reference signals (SRSs)), demodulation reference signals (DMRSs), tracking reference signals (TRSs), phase tracking reference signals (PT-RSs), positioning reference signals (PRSs), or sensing reference signals (SeRSs), etc. Optionally, the pilot reference signals can be referred to as pilots, or pilot signals, where the pilot signals are used for channel measurement. The reference signals in this application can also be reference signals other than the above-mentioned listed reference signals that can be carried in orthogonal frequency division multiplexing (OFDM) symbols, which are not described here.

[0074] 2. Time-frequency resources: Data or information can be carried by time-frequency resources. The time-frequency resources can include resources in the time domain (i.e., time domain resources) and resources in the frequency domain (i.e., frequency domain resources).

[0075] In the time domain, the time domain resources can include one or more time domain units (or also referred to as time units). The time domain units can include radio frames (RFs), subframes, frames, half-subframes, half-frames, slots, mini-slots, partial slots, or orthogonal frequency division multiplexing (OFDM) symbols, etc.

[0076] In the frequency domain, a frequency domain resource can include one or more frequency domain units. A frequency domain unit can include a subcarrier, a component carrier (CC), a resource element (RE), a resource block (RB), a subchannel, a resource pool, a bandwidth, a bandwidth part (BWP), a channel, or an interlace RB, etc.

[0077] In this application, a time-frequency resource includes a time-frequency point, which can be regarded as an RE. For example, a time-frequency point includes a symbol and a subcarrier, which correspond to each other. Alternatively, a time-frequency point can also be regarded as an RB, without limitation.

[0078] 3. Port: A port, or antenna port, can include a transmitting port and a receiving port. An antenna port is a logical concept. One antenna port can correspond to one physical transmitting antenna or multiple physical transmitting antennas. In these two cases, a receiver of a terminal does not decompose signals from the same antenna port. Because, from the perspective of the terminal, whether a channel is formed by a single physical transmitting antenna or by multiple physical transmitting antennas combined, a reference signal (RS) corresponding to the antenna port defines the antenna port, for example, a de-modulation reference signal (DMRS) port. A terminal can obtain a channel estimation of the corresponding antenna port according to the reference signal. Each antenna port corresponds to a time / frequency resource grid and has its own reference signal. An antenna port is a channel. A terminal performs channel estimation and data demodulation according to the reference signal corresponding to the antenna port.

[0079] Optionally, a port refers to a port after beamforming and / or phase rotation.

[0080] An antenna port is usually associated with a reference signal (e.g., a pilot signal). Its meaning can be understood as a transceiving interface on a channel experienced by the reference signal. For a low-frequency system, one antenna port can correspond to one or more antenna elements. These elements jointly transmit the reference signal. A receiving end can regard them as a whole and does not need to distinguish these elements. For a high-frequency system, an antenna port can correspond to a beam. Similarly, a receiving end only needs to regard this beam as an interface and does not need to distinguish each element.

[0081] 4、channel information: measurement information, refers to information about a path and / or a measured channel obtained by a device measuring a channel.

[0082] The channel information indicates information related to a channel between the first device and the second device, for example, at least one of channel state information, channel precoding information, beam information, beam angle information, beam power information, beam indication information, channel eigenvectors, channel eigenvalues, amplitude information of the channel, or phase information of the channel. The channel involved in the present application can be an uplink channel, a downlink channel, or a sidelink channel, etc., which is not limited.

[0083] The channel state information is used to indicate the state of the channel. The channel precoding information is used to indicate the precoding matrix of the channel, etc. The beam information is used to indicate a beam used for transmitting or receiving a signal, etc., for example, including an index of the beam. The beam angle information includes at least one of a beam pointing direction, a beam width, or a beam forming method, etc. The beam pointing direction includes a main lobe direction formed by beamforming, for example. The beam width refers to the degree of widening of the main lobe formed by beamforming in space. The beam forming method refers to the method of beamforming, for example, numerical method, etc. The beam power information is used to indicate the power of the beam. The beam indication information refers to parameters required for beamforming. The channel eigenvector is a vector used to represent the channel transmission characteristics. The channel eigenvalue refers to the eigenvalue of the channel matrix. The amplitude information of the channel refers to the amplitude variation of the signal in the transmission process. The phase information of the channel refers to the phase variation of the signal in the transmission process.

[0084] 5、MPC, which can be a multipath element or a multipath component in Chinese. The MPC reflects the deterministic part in the wireless channel. For example, the MPC can include one or more of the direction of departure (DoD), the direction of arrival (DoA), the power, and the delay.

[0085] For example, the MPC can be obtained by various types of radio frequency map (RF Map) implementation schemes. It should be noted that the present application does not limit the method of obtaining the MPC.

[0086] The above description of the terms is only for the convenience of understanding, and does not limit the protection scope of the embodiments of the present application.

[0087] A radio map can reflect parameter values of various location points in a wireless network. Common radio maps include channel gain maps, received signal strength maps, power spectral density maps, etc. Radio maps have been widely used in wireless communication and networking, including network planning, interference control, power control, resource allocation, handover management, multi-hop routing, dynamic spectrum access, and cognitive radio network tasks.

[0088] FIG. 1 is a schematic diagram of radio map input and output provided by an embodiment of the present application. As shown in FIG. 1, when a channel is predicted using a radio map, radio map input can be information of user equipment (UE) and a base station (such as location coordinates, environmental information, etc.). In FIG. 1, a circular pattern represents the location of the user equipment and the base station, and a rectangular pattern represents the location of a building. Output can be the deterministic part of multipath (MPC) when the user equipment is connected to the base station, i.e., one or more of DoD, DoA, power, elevation angle, azimuth angle, or delay. However, the radio map cannot obtain the phase part (or random phase) of the multipath, resulting in ineffective channel measurement and estimation.

[0089] Currently, a projection operator is usually used to complete sparse measurement of a channel. For example, by performing HOSVD decomposition on the channel, the sparsity of each dimension (frequency domain, time domain, antenna, etc.) is analyzed. Alternatively, by performing SVD decomposition on the second-order correlation matrix of the channel, the joint sparsity of multiple dimensions is obtained. Then, sparse measurement of the channel can be achieved using the sparsity. However, the above method has a large computational overhead of the projection operator when the channel dimension is large, resulting in a large computational overhead of channel measurement.

[0090] Therefore, the present application provides a communication method and device. In the method, a first communication device (hereinafter referred to as a second device) can send first indication information to a second communication device (hereinafter referred to as a third device), where the first indication information is used to indicate first bias information of first information, and the first bias information of the first information is related to MPC of the first device; the first information and the first bias information of the first information are associated with measurement configuration of a reference signal. The first device can be the first communication device or the second communication device. In the method, the MPC of the first device can effectively adjust the measurement configuration of the reference signal used in the channel measurement and feedback process, improve the robustness of channel measurement and feedback under non-ideal factors, and reduce the calculation overhead. The first communication device can be a communication device (such as a terminal device or a network device), or the first communication device can be a component (such as a chip or a chip system or a circuit or a communication module) of the communication device. The second communication device can be a communication device (such as a terminal device or a network device), or the second communication device can be a component (such as a chip or a chip system or a circuit or a communication module) of the communication device.

[0091] Based on the above, in order to better understand the communication method and related device provided by the present application, the system architecture of the embodiments of the present application is described below.

[0092] The technical solutions provided by the present application can be applied to various communication systems, such as a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a wireless local area network (WLAN) system, a satellite communication system, a future communication system, or a fusion system of multiple systems, etc. The technical solutions provided by the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication system or other communication systems.

[0093] FIG. 2A is a schematic diagram of a communication system according to an embodiment of the present application. As shown in FIG. 2A, the communication system includes a second device 201 and a third device 202. The second device 201 can send first indication information to the third device 202, where the first indication information is used to indicate first offset information of first information, the first offset information of the first information is related to MPC of a first device, and the first information and the first offset information of the first information are associated with measurement configuration of a reference signal.

[0094] In the embodiments of the present application, the third device 202 can be a network device when the second device 201 is a terminal, and the third device 202 can be a terminal when the second device 201 is a network device. For example, the second device 201 is a network device, and the third device 202 is a terminal, i.e., the network device sends the first indication information to the terminal. For another example, the second device 201 is a terminal, and the third device 202 is a network device, i.e., the terminal sends the first indication information to the network device. For another example, the second device 201 is a first terminal, and the third device 202 is a second terminal, i.e., the first terminal sends the first indication information to the second terminal.

[0095] The technical solutions provided by the present application can be applied to scenarios of uplink channel estimation or downlink channel estimation or other channel estimation. For example, in the scenario of uplink channel estimation, the first information and the first offset information of the first information are associated with measurement configuration of an uplink reference signal. For another example, in the scenario of downlink channel estimation, the first information and the first offset information of the first information are associated with measurement configuration of a downlink reference signal.

[0096] The specific process of transmitting and processing information by the second device 201 and the third device 202 can be referred to the embodiments below, which will not be described here.

[0097] FIG. 2B is a schematic diagram of another communication system according to an embodiment of the present application. As shown in FIG. 2B, the communication system can include a network device and a terminal.

[0098] In some embodiments of the present application, the third device 202 shown in FIG. 2B is a terminal, and the second device 201 shown in FIG. 2B is a network device. In this case, the network device can send the first indication information to the terminal.

[0099] In some embodiments of the present application, the third device 202 shown in FIG. 2B is a network device, and the second device 201 shown in FIG. 2B is a terminal. In this case, the terminal can send the first indication information to the network device.

[0100] Exemplarily, the terminal can be connected with the network device by wireless mode, and can access to the core network through the network device. The terminal can be fixed position or mobile.

[0101] The network device can be an entity for transmitting or receiving signals, and can be a device for communicating with the terminal. The network device can be a base station (base transceiver station, BTS) in a global system for mobile communications (GSM) system or a code division multiple access (CDMA) system, can be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, can be an evolved NodeB (eNB or eNodeB) in an LTE system, can be a wireless controller in a cloud radio access network (CRAN) scenario, or can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a 5G network, or a network device in a future evolved PLMN network, etc. The embodiments of the present application are not limited. The network device can be a device in a wireless network, for example, a radio access network (RAN) node for accessing the terminal to the wireless network. At present, some examples of the RAN node are: a base station, a next-generation base station gNB, a transmission reception point (TRP), an evolved Node B (eNB), a home base station, a baseband unit (BBU), or an access point (AP) in a WiFi system, etc. In a network structure, the network device can include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including the CU node and the DU node.

[0102] A terminal is an entity used for receiving or transmitting signals at a user side, such as a UE, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user equipment. The at least two terminals can also be a mobile phone, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a Pad, a computer with wireless transceiver, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in an industrial control, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable device (for example, a smart watch, a smart bracelet, a pedometer, etc.), a terminal in a 5G network, or a terminal in a future evolved public land mobile network (PLMN), and the like, and the embodiments of the present application are not limited thereto. The at least two terminals can be deployed on land, including indoors or outdoors, handheld, wearable, or in-vehicle, can also be deployed on the water surface (such as a ship, etc.), and can also be deployed in the air (such as an airplane, a balloon, and a satellite, etc.). In the embodiments of the present application, the at least two terminals can be a legacy UE, can also be a RB-level partial frequency hopping (RPFS) UE supporting SRS coverage and capacity enhancement, and can also be other UEs, and the present application does not limit the type of the at least two terminals. The legacy UE refers to a UE supporting an existing mechanism, for example, a UE supporting release-15 or release-16.

[0103] As an example but not limitation, in embodiments of the present application, the terminal can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also has powerful functions through software support and data interaction and cloud interaction. The broad sense of the wearable smart device includes devices with full functions and large sizes, which can realize complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, and devices that focus on a certain application function and need to be used in cooperation with other devices, such as smart phones, such as various smart wristbands and smart jewelry for monitoring vital signs. In addition, in embodiments of the present application, the terminal can also be a terminal in an internet of things (IoT) system. The IoT is an important part of the future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. In embodiments of the present application, the IOT technology can achieve mass connection, deep coverage, and terminal power saving through, for example, narrow band (NB) technology. In addition, in embodiments of the present application, the terminal can also include a smart printer, a train detector, a gas station sensor, and the like, and the main functions include collecting data (part of the terminal), receiving control information and downlink data of a network device, and transmitting electromagnetic waves to transmit uplink data to the network device.

[0104] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a global system for mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), an LTE system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a universal mobile telecommunications system (UMTS) system, an enhanced data rate for GSM evolution (EDGE) system, a worldwide interoperability for microwave access (WiMAX) system. The technical solutions of the embodiments of the present application can also be applied to other communication systems, for example, a public land mobile network (PLMN) system, an LTE advanced (LTE-A) system, a 5G system, a new radio (NR) system, a machine to machine (M2M) system, or other future evolved communication systems, and the embodiments of the present application are not limited thereto.

[0105] In the embodiments of the present application, the terminal or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also referred to as a main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer includes applications such as a browser, an address book, word processing software, and instant messaging software. Moreover, the embodiments of the present application do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application, as long as the execution subject can communicate according to the method provided by the embodiments of the present application by running a program in which the code of the method provided by the embodiments of the present application is recorded. For example, the execution subject of the method provided by the embodiments of the present application can be a terminal or a network device, or a functional module in the terminal or the network device that can call and execute a program.

[0106] It should be noted that the number and types of terminals included in the network architecture shown in FIG. 2B are merely examples, and the embodiments of the present application are not limited thereto. For example, more or fewer terminals that communicate with the network device can also be included, and for the sake of brevity, they are not described one by one in the drawings. In addition, in the network architecture shown in FIG. 2B, although the network device and the terminal are shown, the application scenario can not be limited to including the network device and the terminal, for example, a core network node or a device for carrying a virtualized network function can also be included, which is obvious to those skilled in the art, and will not be described one by one here.

[0107] It should be noted that the network structure shown in FIG. 2B is only an example provided by the present application, and the present application does not limit the network structure of the communication system. For example, the communication system can also include at least one base station (BS) and at least one mobile station (MS), wherein the base station provides communication services to multiple mobile stations. The wireless communication system can also perform point-to-point communication, such as communication between multiple mobile stations (terminals). Then, the second device 201 can be the above-mentioned base station, the third device 202 can be the above-mentioned mobile station, and the first device can also be the mobile station; or the second device 201 can be the above-mentioned mobile station, the first device can also be the mobile station, and the third device 202 can be the above-mentioned base station.

[0108] Exemplarily, the mobile station can be a distributed node, which can be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem with wireless communication function. The distributed node can also be referred to as a terminal, and can also be a subscriber unit, a cellular phone, a smart phone, a wireless data card, a personal digital assistant computer, a tablet computer, a wireless modem, a handset, a laptop computer, a machine type communication (MTC) terminal, etc.

[0109] Exemplarily, the communication system to which the present application is applicable can also be a cellular mobile communication, satellite communication and short-range wireless communication system, including but not limited to: a narrow band-internet of things (NB-IoT) system, a GSM system, an enhanced data rate for GSM evolution (EDGE) system, a WCDMA system, a code division multiple access 2000 (CDMA2000) system, a time division-synchronization code division multiple access (TD-SCDMA) system, an LTE system and three major application scenarios of a 5G mobile communication system, i.e., an enhanced mobile broadband (eMBB), an ultra-reliable low-latency communication (URLLC) and an enhanced machine type communication (eMTC).

[0110] In combination with the system architecture described above, a communication method provided by an embodiment of the present application is described below.

[0111] Please refer to FIG. 3, which is a flow diagram of a communication method provided by an embodiment of the present application.

[0112] In the embodiments of the present application, the device that sends the first indication information (the first indication information is used to indicate the first bias information of the first information) is referred to as a second device, and the device that receives the first indication information is referred to as a third device. In the embodiments of the present application, when the second device is a terminal, the third device can be a network device, and when the second device is a network device, the third device can be a terminal.

[0113] As shown in FIG. 3, the communication method can include the following steps:

[0114] S301: The second device obtains the first information, and the first information includes the first reference signal density and / or the first feedback dimension.

[0115] The first reference signal density can refer to the number of resource elements (REs) occupied by the reference signal in each antenna port of the device that sends the reference signal, or can refer to the number of time-frequency points occupied by the reference signal transmitted by each transmit antenna port, or the number of REs occupied by the reference signal (or pilot) on each physical resource block. In the present application, the reference signal can be a pilot, and the reference signal density can also be referred to as the pilot density; the first reference signal density can also be referred to as the basic reference signal density or the basic pilot density, and the first feedback dimension can also be referred to as the sparse measurement dimension or the basic feedback dimension, which are not limited in the present application.

[0116] In some embodiments, the second device can obtain the MPC of the first device, for example, the second device is a network device, and the first device is a terminal. The second device can obtain the MPC of the position where the terminal is located when connected to the network device through a radio map; then, the second device can estimate the amount of parameters to be obtained, such as phase, according to the MPC; and determine the first reference signal density and / or the first feedback dimension based on the amount of parameters to be obtained. In the present application, the MPC of the first device can also be referred to as the MPC of the position where the first device is located; if the first device is a terminal, the MPC of the first device can also be referred to as the MPC of the position where the terminal is located when connected to the network device, which is not limited in the present application.

[0117] Optionally, the feedback dimension includes at least one of a spatial domain feedback dimension, a time domain feedback dimension, and a frequency domain feedback dimension. The spatial domain feedback dimension includes a transmission antenna feedback dimension and / or a reception antenna feedback dimension, the transmission antenna feedback dimension being used to determine Q first transmission antenna ports, and the reception antenna feedback dimension being used to determine X first reception antenna ports, wherein the Q first transmission antenna ports are used to transmit the reference signal, and the X first reception antenna ports are used to receive the reference signal, Q and X are integers greater than or equal to 1. The time domain feedback dimension and the frequency domain feedback dimension are used to determine K second time-frequency points, and the K second time-frequency points are used to transmit the reference signal, K being an integer greater than or equal to 1. Alternatively, after the K second time-frequency points are determined, the channel feedback information on the K second time-frequency points needs to be fed back. For example, for a downlink transmission system, the network side transmits the reference signal, and after the terminal side completes channel measurement and estimation based on the reference signal, the terminal side also needs to feed back the channel information corresponding to the feedback dimension to the network side, and thus needs to feed back the channel information corresponding to the K second time-frequency points.

[0118] In the embodiments of the present application, the reference signal includes at least one of the following: a pilot signal (for example, CSI-RS or SRS), DMRS, TRS, PT-RS, PRS, SeRS, or other reference signals, without limitation.

[0119] S302: The third device acquires first information.

[0120] For example, the specific implementation of the third device acquiring the first information can refer to step S301, which will not be described here.

[0121] It should be noted that the present application does not limit the execution order of step S302 and step S303 described below, for example, step S302 and step S303 can be executed simultaneously, or step S302 is executed first and then step S303 is executed, or step S303 is executed first and then step S302 is executed.

[0122] S303: The second device sends first indication information to the third device, the first indication information being used to indicate first offset information of the first information, the first offset information of the first information being related to the MPC of the first device; the first information and the first offset information of the first information are associated with the measurement configuration of the reference signal.

[0123] Correspondingly, the third device receives the first indication information from the second device. The first indication information is used to indicate the first bias information of the first information. If the first information is the first reference signal density, the bias information of the first information is the bias information of the first reference signal density. If the first information is the first feedback dimension, the bias information of the first information is the bias information of the first feedback dimension. If the first information is the first reference signal density and / or the first feedback dimension, the first bias information of the first information is the bias information of the first reference signal density and / or the bias information of the first feedback dimension. In this application, the bias information can also be referred to as offset or redundancy. The bias information of the reference signal density can also be referred to as pilot density offset. The bias information of the feedback dimension can also be referred to as feedback dimension offset. This application does not limit this.

[0124] In the embodiments of this application, when the second device is a terminal, the third device can be a network device. When the second device is a network device, the third device can be a terminal. For example, the second device is a terminal, and the third device is a network device. Then, step S303 can be that the terminal sends the first indication information to the network device. For another example, the second device is a network device, and the third device is a terminal. Then, step S303 can be that the network device sends the first indication information to the terminal.

[0125] The first device can be the second device or the third device.

[0126] For example, the MPC can include at least one of DoD, DoA, power, pitch angle, azimuth angle, or time delay. The DoD refers to the angle of the path from the transmitting end, including the horizontal direction (also known as azimuth angle) and the vertical direction (also known as pitch angle). The DoA refers to the angle of the path to the receiving end, including the horizontal direction (also known as azimuth angle) and the vertical direction (also known as pitch angle). The time delay refers to the time consumed from the transmission of the transmitting end to the reception of the receiving end, also known as time of flight.

[0127] Optionally, the first bias information of the first information can also be related to performance requirements. The performance requirements can refer to that each performance index reaches the expected value corresponding to the performance index. For example, the performance index can be an index related to phase correction or channel measurement, such as normalized mean square error, channel cosine similarity, cosine similarity of top-k flow strength, etc. Alternatively, the performance requirement can also be a system-related index, such as system throughput, etc. The above performance requirements can be specified by a standard or pre-configured by a manufacturer or pre-configured by high-layer signaling, such as radio resource control (RRC) signaling configuration. This application does not limit this.

[0128] Optionally, the second device can be a device for determining the first bias information of the first information. For example, the second device can determine the first bias information of the first information based on the MPC of the first device. For another example, the second device can determine the first bias information of the first information based on the MPC of the first device and the performance requirement. It should be noted that the device for determining the first bias information of the first information (i.e., the second device) can be a network device or a terminal.

[0129] The following exemplary introduces several implementations of the second device determining the first information (i.e., the bias information of the first reference signal density, and / or the bias information of the first feedback dimension).

[0130] In the first implementation, the second device can determine the bias information of the first reference signal density, and / or determine the bias information of the first feedback dimension, based on the MPC, by a performance test method.

[0131] For example, the second device can perform a performance test based on the MPC and the first reference signal density, to obtain a performance test result corresponding to the first reference signal density; and determine the bias information of the first reference signal density based on the performance test result corresponding to the first reference signal density and the performance requirement.

[0132] Optionally, the performance test result corresponding to the first reference signal density can also be related to the performance requirement. For example, the second device can perform a performance test based on the MPC, the performance requirement and the first reference signal density, to obtain a performance test result corresponding to the first reference signal density.

[0133] For example, the performance test method can include the following steps S11 to S13. In step S11, the second device obtains the MPC of the location where the first device is located, for example, the MPC can be obtained by an RF map; in step S12, the second device estimates the amount of parameters to be obtained according to the MPC, and then determines the first reference signal density (or referred to as the basic reference signal density) based on the amount of parameters to be obtained; in step S13, the second device performs N times of prediction processes (also referred to as test processes). The i-th prediction process is: based on the reference signal channel performance corresponding to the reference signal density obtained in the (i-1)-th prediction process, if the channel performance meets the performance requirement, the difference between the reference signal density obtained in the (i-1)-th prediction process and the first reference signal density is taken as the bias information of the first reference signal density; if the channel performance does not meet the performance requirement, the reference signal density obtained in the (i-1)-th prediction process is increased to obtain the reference signal density obtained in the i-th prediction process. Wherein, 1≤i≤N, i is an integer, N is an integer greater than 0, and the reference signal density used for channel performance prediction in the first prediction process (i.e., the reference signal density obtained in the 0-th prediction process) can be the first reference signal density.

[0134] It can be understood that the channel performance predicted by the first reference signal density corresponds to the performance test result corresponding to the first reference signal density. Wherein, the channel performance meeting the performance requirement can mean that each performance index corresponding to the channel is greater than the expected value corresponding to the performance requirement, and increasing the reference signal density obtained in the i-1th prediction process can mean increasing the value of the reference signal density.

[0135] Wherein, a possible implementation of step S13 can be: first, according to the current reference signal density (the initial value is the first reference signal density), simulate the channel estimation to obtain the estimated value of the channel matrix Wherein, The estimated value of the channel at the current time can be obtained by using the deterministic information of MPC, the time-frequency domain conversion module and the random phase, or can be obtained from the channel data at the last time. Then, the performance index is calculated according to And If the calculated performance index is greater than the expected value corresponding to the performance requirement, the current reference signal density is selected, and the bias information of the reference signal density is the difference between the current reference signal density and the first reference signal density; if the performance index is less than or equal to the expected value corresponding to the performance requirement, the current reference signal density is increased, and the test is performed again until the calculated performance meets the performance requirement.

[0136] Optionally, the performance test result corresponding to the first feedback dimension can also be related to the performance requirement, for example, the second device can perform performance test based on MPC, performance requirement and first reference signal density to obtain the performance test result corresponding to the first feedback dimension.

[0137] ​For example, the above performance testing method may include the following steps S21 to S23. Step S21: The second device obtains the MPC of the first device, for example, the MPC can be obtained through an RF map; Step S22: Estimate the number of parameters to be acquired based on the MPC, and then determine the first feedback dimension (or basic feedback dimension) based on the number of parameters to be acquired; Step S23: The second device performs N prediction processes (also called testing processes), where the i-th prediction process is: predicting channel performance based on the reference signal corresponding to the feedback dimension obtained in the (i-1)-th prediction process; if the channel performance meets the above performance requirements, the difference between the feedback dimension obtained in the (i-1)-th prediction process and the first feedback dimension is used as the bias information of the first feedback dimension; if the channel performance does not meet the above performance requirements, the feedback dimension obtained in the (i-1)-th prediction process is increased to obtain the feedback dimension obtained in the i-th prediction process. Where 1 ≤ i ≤ N, i is an integer, N is an integer greater than 0, and the feedback dimension used for channel performance prediction in the first prediction process (i.e., the feedback dimension obtained in the 0th prediction process) can be the first feedback dimension. Understandably, the channel performance predicted by the reference signal corresponding to the first feedback dimension is the performance test result corresponding to the first feedback dimension. Here, "satisfying the performance requirements" means that the various performance indicators of the channel are greater than the expected values ​​corresponding to the performance requirements. Increasing the feedback dimension obtained in the (i-1)th prediction process can be achieved by increasing the value of that feedback dimension.

[0138] One possible implementation of step S23 is as follows: First, based on the current feedback dimension (the initial feedback dimension is the first feedback dimension), two sets of estimated values ​​for the channel are predicted. and (The estimated channel value at the current moment can be obtained using the deterministic information of MPC, the time-frequency domain conversion module, and two sets of random phases; alternatively, channel correlation data from the previous moment can be used.) For example, the estimated value can be the CSI. Then, based on the first feedback dimension, using... right Perform phase correction to obtain The estimated value according to and Calculate the performance metric. If the calculated performance metric is greater than the expected value corresponding to the performance requirement, the difference between the current feedback dimension and the first feedback dimension is determined as the bias information of the first feedback dimension; if the calculated performance metric is less than or equal to the expected value corresponding to the performance requirement, the current feedback dimension is increased, and the test is repeated until the calculated performance meets the performance requirement.

[0139] Optionally, the device that specifies the bias information of the first information determined by the performance test can be the second device or the third device. That is, the second device can send the second indication information to the third device, and correspondingly, the third device receives the second indication information from the second device; or the third device can send the second indication information to the second device, and correspondingly, the second device receives the second indication information from the third device. The second indication information is used to indicate the first bias information of the first information determined based on the second information, and the second information includes the performance requirement. For example, the second device can determine the bias information of the first reference signal density based on the MPC and the performance requirement after receiving the second indication information from the third device, and / or determine the bias information of the first feedback dimension based on the MPC and the performance requirement.

[0140] It should be noted that the meaning of the second indication information can be: the second indication information is used to indicate the first bias information of the first information determined based on the second information, and the second information includes the performance requirement; or the second indication information is used to indicate that the bias determination mode is the first mode, and the first mode is the test; or the second indication information is used to indicate the first bias information of the first information determined based on the performance test.

[0141] In the second implementation, the second device can determine the first bias information of the first information (i.e., the bias information of the first reference signal density, and / or the bias information of the first feedback dimension determined based on the MPC and the performance requirement) based on the MPC and the third information through the correspondence between the third information and the bias information of the first information. The third information includes the signal-to-noise ratio and / or the signal-to-interference-and-noise ratio. The correspondence between the third information and the bias information of the first information can be represented by a table or text or data, which is not limited in the present application.

[0142] For example, the second device can obtain the third information, determine the first correspondence based on the MPC, determine the bias information of the first feedback dimension based on the third information and the first correspondence, and / or determine the bias information of the first reference signal density based on the third information and the first correspondence. The first correspondence includes the correspondence between the third information and the bias information of the first feedback dimension, and / or the first correspondence includes the correspondence between the third information and the bias information of the first reference signal density. Optionally, the first correspondence can also be related to the performance requirement, for example, the second device can determine the first correspondence based on the MPC and the performance requirement.

[0143] Optionally, the first correspondence relationship can be represented by a table (such as Table 1 below), the correspondence relationship between the third information and the offset information of the first reference signal density can be represented by a row in the table, and / or the correspondence relationship between the third information and the offset information of the first feedback dimension can be represented by a row in the table; or the first correspondence relationship can also be represented by other manners such as words or arrays; the present application does not make any limitation in this regard.

[0144] For example, the offset information of the first information can be related to MPC, and different tables (which can be referred to as feedback dimension-pilot density table) can be constructed for different MPCs, that is, each MPC has a corresponding table. Then, the second device can obtain the offset information of the first information from the configured table based on the MPC and the third information. For example, the second device can query the table corresponding to the MPC from the configured table based on the MPC; and then query the offset information of the reference signal density and / or the offset information of the feedback dimension corresponding to the third information from the queried table based on the third information, and determine the queried offset information as the offset information of the first information. Assuming that the third information and the corresponding offset information are located in the same row (as shown in Table 1), the second device determines the feedback dimension offset and the pilot density offset in the row where the third information is located as the first offset information of the first information.

[0145] For another example, the offset information of the first information can be related to MPC and performance requirement, and different tables (which can be referred to as feedback dimension-pilot density table) can be constructed for different MPCs and performance requirements. For example, the construction process of the table can be: classifying MPCs according to the distribution, diameter, and correlation of the MPCs, constructing a corresponding table for one or a group of similar MPCs and performance requirements, and each table can correspond to a different table identity document (ID), and the table can be specified by a standard or preconfigured by a manufacturer.

[0146] For example, the table can include but is not limited to the following contents: row ID, SNR, feedback dimension offset, pilot density offset, common data model (CDM) type. Among them, the feedback dimension offset = f (MPC, performance requirement, SNR), that is, the feedback dimension offset is calculated based on MPC, performance requirement, and SNR by formula f (); the pilot density offset = g (MPC, performance requirement, feedback dimension offset, SNR), that is, the pilot density offset is calculated based on MPC, performance requirement, feedback dimension offset, and SNR by formula g(), and the present application does not make any limitation on the formula for calculating the feedback dimension offset and the pilot density offset.

[0147] Table 1 is an exemplary feedback dimension-pilot density table provided by an embodiment of the present application.

[0148] Table 1

[0149] Wherein, a, b, c and d are used to represent different values.

[0150] Optionally, the feedback dimension-pilot density table (such as Table 1) can be configured or preset, and the present application does not make any limitation in this regard.

[0151] It should be noted that Table 1 is an example provided by an embodiment of the present application, and Table 1 includes the correspondence between the third information (i.e., the SNR) and the offset information of the reference signal density (i.e., the pilot density offset), and the correspondence between the third information and the offset information of the feedback dimension (i.e., the feedback dimension offset). In other embodiments of the present application, the table can only include the correspondence between the third information and the offset information of the reference signal density or the correspondence between the third information and the offset information of the feedback dimension, and the present application does not make any limitation in this regard. In addition, the present application does not make any limitation on the number of rows, the number of columns and the arrangement order of the table, and the table can be variously modified, and the present application does not make any limitation in this regard.

[0152] The process of determining the first offset information of the first information by the second device is introduced by taking Table 1 as an example of the first correspondence. For example, the MPC corresponds to Table 1, and then the second device determines the first correspondence based on the MPC, which can be that the second device determines Table 1 corresponding to the MPC as the first correspondence. For another example, the MPC and the performance requirement correspond to Table 1, and then the second device determines the first correspondence based on the MPC and the performance requirement, which can be that the second device determines Table 1 corresponding to the MPC as the first correspondence.

[0153] Suppose the third information is SNR=20, and then the second device determines the offset information of the first feedback dimension based on the third information and the first correspondence, which can be that the second device finds the row where the third information (SNR=20) is located in Table 1, determines that the row ID of the row where the third information is located is 0, and determines the offset information of the feedback dimension (i.e., feedback dimension offset=a) included in the row as the offset information of the first feedback dimension. The second device determines the offset information of the first reference signal density based on the third information and the first correspondence, which can be that the second device finds the row where the third information (SNR=20) is located in Table 1 (i.e., the row where the row ID is 0), and determines the offset information of the feedback dimension (i.e., pilot density offset=c) included in the row as the offset information of the first reference signal density.

[0154] Optionally, the device that specifies the bias information of the first information determined by the table lookup can be the second device or the third device. That is, the second device can send third indication information to the third device, and correspondingly, the third device receives the third indication information from the second device; or the third device can send third indication information to the second device, and correspondingly, the second device receives the third indication information from the third device. The third indication information is used to indicate the first bias information of the first information determined based on fourth information, and the fourth information includes the first correspondence. For example, after receiving the third indication information from the third device, the second device can determine the bias information of the first reference signal density based on the MPC and the third information, and / or determine the bias information of the first feedback dimension based on the MPC and the performance requirement.

[0155] It should be noted that the meaning of the third indication information can be: the third indication information is used to indicate the first bias information of the first information determined based on the fourth information, and the fourth information includes the first correspondence; or the third indication information is used to indicate that the bias determination manner is the second manner, and the second manner is the table lookup; or the third indication information is used to indicate the first bias information of the first information determined based on the table lookup or the row ID corresponding to the first bias information.

[0156] In the third implementation, the second device can determine the first bias information of the first information based on the received second bias information of the first information.

[0157] For example, the second device can receive fourth indication information, wherein the fourth indication information is used to indicate the second bias information of the first information, and the second bias information is related to the MPC; and determine the first bias information of the first information based on the second bias information.

[0158] Optionally, the first bias information can be the same as the second bias information, that is, the received second bias information is the first bias information; or the first bias information can be obtained based on the second bias information, for example, when multiple terminals send respectively sent second bias information, the maximum value is selected from multiple second bias information (or bias information of multiple users) as the first bias information, which is not limited in the present application.

[0159] Optionally, the first information and the first bias information of the first information are associated with the measurement configuration of the reference signal, for example, the above-mentioned reference signal can include the following first reference signal or the following second reference signal. It should be noted that the above-mentioned reference signal can be an uplink reference signal or a downlink reference signal, which is not limited in the present application.

[0160] Optionally, the measurement configuration of the reference signal can be a reference signal resource configuration, and / or a reporting configuration of the measurement result of the reference signal, wherein the reference signal resource configuration can be a pattern configuration of the reference signal; the reporting configuration of the measurement result of the reference signal can be a configuration of a feedback dimension, such as a configuration of a time-frequency resource or an antenna port. The time-frequency resource can be a RE or a resource block (RB); the time-frequency resource can also be referred to as a time-frequency point, and one time-frequency point can be regarded as one RE, for example, one time-frequency point includes one symbol and one subcarrier, and the one symbol and the one subcarrier correspond to each other. Alternatively, one time-frequency point can also be regarded as one RB, which is not limited in the application. For example, the time-frequency resource can be the first time-frequency resource or the second time-frequency resource, and the antenna port can be the first antenna port or the second antenna port.

[0161] The following exemplary introduces two ways (way 1 and way 2) of determining the pattern configuration of the reference signal.

[0162] Way 1: For example, the reference signal includes a first reference signal, and the second device can determine the pattern of the first reference signal based on the first reference signal density and the bias information of the first reference signal density; and send fifth indication information to the third device, the fifth indication information being used to indicate the pattern of the first reference signal.

[0163] Optionally, the second device and the third device can also perform channel measurement and feedback based on the pattern of the first reference signal. Assuming that the second device is a device for sending the reference signal, and the third device is a device for performing channel measurement, the second device can send the first reference signal based on the pattern of the first reference signal, and then the third device can perform channel measurement based on the received first reference signal and feed back the channel measurement result to the second device. Assuming that the third device is a device for sending the reference signal, and the second device is a device for performing channel measurement, the third device can send the first reference signal based on the pattern of the first reference signal, and then the second device can perform channel measurement based on the received first reference signal and feed back the channel measurement result to the third device.

[0164] Way 2: For example, the reference signal includes a second reference signal, and the second device can determine the pattern of the second reference signal based on the first reference signal density; send sixth indication information to the third device, the sixth indication information being used to indicate the pattern of the second reference signal; determine the bias information of the pattern of the second reference signal based on the bias information of the first reference signal density; and send seventh indication information to the third device, the seventh indication information being used to indicate the bias information of the pattern of the second reference signal.

[0165] Optionally, the second device and the third device can also perform channel measurement and feedback based on the pattern of the second reference signal and the offset information of the pattern of the second reference signal. Assuming that the second device is the device that transmits the reference signal and the third device is the device that performs channel measurement, the second device can transmit the second reference signal based on the pattern of the second reference signal and the offset information of the pattern of the second reference signal, and then the third device can perform channel measurement based on the received second reference signal and feed back the channel measurement result (or channel information) to the second device. Assuming that the third device is the device that transmits the reference signal and the second device is the device that performs channel measurement, the third device can transmit the second reference signal based on the pattern of the second reference signal and the offset information of the pattern of the second reference signal, and then the second device can perform channel measurement based on the received second reference signal and feed back the channel measurement result to the third device.

[0166] The following exemplary introduces two ways (way 3 and way 4) of determining the reporting configuration of the reference signal.

[0167] Way 3: The second device can determine the fifth information based on the first feedback dimension and the offset information of the first feedback dimension, the fifth information including the first time-frequency resource and / or the first antenna port; and then send the eighth indication information to the third device, the eighth indication information being used to indicate the fifth information.

[0168] Optionally, the second device and the third device can also perform channel measurement and feedback based on the first time-frequency resource and / or the first antenna port. Assuming that the second device is the device that transmits the reference signal and the third device is the device that performs channel measurement, the third device can feed back the corresponding channel information based on the first time-frequency resource and / or the first antenna port, and correspondingly, the second device receives the above channel information; assuming that the third device is the device that transmits the reference signal and the second device is the device that performs channel measurement, the second device can feed back the corresponding channel information based on the first time-frequency resource and / or the first antenna port, and correspondingly, the third device receives the above channel information.

[0169] Way 4: The second device can determine the sixth information based on the first feedback dimension, the sixth information including the second time-frequency resource and / or the second antenna port; and then send the ninth indication information to the third device, the ninth indication information being used to indicate the sixth information; determine the offset information of the sixth information based on the offset information of the first feedback dimension; and then send the tenth indication information to the third device, the tenth indication information being used to indicate the offset information of the sixth information.

[0170] Optionally, the second device and the third device can also perform channel measurement and feedback based on the sixth information and the bias information of the sixth information. Assuming that the second device is the device that transmits the reference signal and the third device is the device that performs channel measurement, the third device can feed back the corresponding channel information based on the sixth information and the bias information of the sixth information, and correspondingly, the second device receives the channel information. Assuming that the third device is the device that transmits the reference signal and the second device is the device that performs channel measurement, the second device can feed back the corresponding channel information based on the sixth information and the bias information of the sixth information, and correspondingly, the third device receives the channel information.

[0171] In the embodiments of the present application, the second device and the third device can perform channel measurement and feedback in any one of the manner 1 to the manner 4, or the second device and the third device can perform channel measurement and feedback in the manner 1 and the manner 3, or the second device and the third device can perform channel measurement and feedback in the manner 2 and the manner 4, and the present application does not limit this.

[0172] The method embodiments shown in FIG. 3 include many possible implementation schemes. Some implementation schemes will be described below with reference to FIG. 4 and FIG. 5. It should be noted that the related concepts, operations or logical relationships not explained in FIG. 4 and FIG. 5 can be referred to the corresponding descriptions in the embodiments shown in FIG. 3.

[0173] In the present application, the embodiments shown in FIG. 4 and FIG. 5 can be a separate embodiment, and the embodiments shown in FIG. 4 and FIG. 5 can not depend on the technical solutions of FIG. 3. Some steps in the embodiments shown in FIG. 4 and FIG. 5 can also be a separate embodiment.

[0174] FIG. 4 is a flow diagram of another communication method according to an embodiment of the present application. In FIG. 4, the steps in dashed boxes represent optional steps, i.e., the method can not include one or more of steps S401, S403, S405 or S407.

[0175] In the embodiments of the present application, the second device is a network device, the third device is a terminal, and the first device is the third device (i.e., the MPC of the first device is the MPC of the terminal). The communication method provided by the present application will be described in detail. For example, the network device can be a network (network, NW), and the terminal can be a UE. In the embodiments of the present application, the functions performed by the terminal can also be performed by a module (for example, a chip) in the terminal, and the functions performed by the network device can also be performed by a module (for example, a chip) in the network device.

[0176] For example, in the embodiments of the present application, the first bias information of the first information is the bias information of the first information, and the third information is the signal-to-noise ratio information.

[0177] S401: The network device and the terminal align preconfigured information, which includes a bias determination method.

[0178] For example, the bias determination method can include a first method or a second method, where the first method is performance testing, and the second method is table lookup. For details, refer to the description of step S303 above, which will not be repeated here.

[0179] Optionally, when the first method is performance testing, the preconfigured information can further include indication information for indicating a device for performing performance testing, such as indicating performance testing by the network device or indicating performance testing by the terminal.

[0180] Optionally, the preconfigured information can further include performance requirements, and if the bias determination method is table lookup, the preconfigured information can further include table information.

[0181] Optionally, the preconfigured information can be specified by the network device or upper signaling (such as RRC signaling) or the terminal, which is not limited in the present application.

[0182] S402: The network device obtains the MPC of the terminal.

[0183] For example, the first device can obtain the MPC based on a radio map, or the first device can obtain the MPC according to a ray tracing technique. The radio map refers to a map for displaying the coverage range and signal strength distribution of a wireless signal, which can reflect the parameter values of various position points of the first device in the wireless network. It can be understood that the present application does not limit the specific implementation of the first device obtaining the MPC of the position of the first device, and the related description of the existing MPC can be referred to.

[0184] S403: The terminal sends antenna dimension information to the network device.

[0185] Optionally, the terminal can also send performance requirements to the network device.

[0186] S404: The network device determines first information based on the MPC and the antenna dimension information of the terminal, where the first information includes a first feedback dimension and / or a first reference signal density.

[0187] In an implementation, the network device can estimate the to-be-acquired parameter quantity according to the MPC, determine the first feedback dimension and the first pilot density according to the to-be-acquired parameter quantity, the antenna dimension information, and the time-frequency dimension information, wherein the antenna dimension information can include information of the transmit antenna feedback dimension and / or the receive antenna feedback dimension, and the time-frequency dimension information can include information of the time domain feedback dimension and the frequency domain feedback dimension. The phase and the MPC belong to channel information. Optionally, the channel information is obtained by measuring the channel based on a reference signal. The specific form of the to-be-acquired parameter quantity is not limited in the application.

[0188] For example, the network device can preferentially compress the spatial domain to obtain the spatial domain feedback dimension, for example, including the transmit antenna feedback dimension and the receive antenna feedback dimension; and then adjust the time domain feedback dimension and the frequency domain feedback dimension to ensure that the compressed feedback dimension is greater than the to-be-acquired parameter quantity.

[0189] S405: The terminal sends the signal-to-noise ratio information to the network device.

[0190] S406: The network device determines the bias information of the first information based on the signal-to-noise ratio information and the bias determination manner.

[0191] The bias information of the first information includes the bias information of the first feedback dimension and / or the bias information of the first reference signal density.

[0192] For example, the specific implementation of step S406 can also refer to the related content in step S303, which will not be described here.

[0193] S407: The network device and the terminal perform channel measurement and feedback based on the first information and the bias information of the first information.

[0194] In some embodiments, the network device can determine the measurement configuration of the reference signal based on the first feedback dimension, the first reference signal density, the bias information of the first feedback dimension, and the bias information of the first reference signal density; and then the network device and the terminal perform sparse channel measurement and feedback based on the measurement configuration of the reference signal.

[0195] For example, the measurement configuration of the reference signal can include at least one of the following: the pattern of the first reference signal, or the pattern of the second reference signal and the bias information of the pattern of the second reference signal, or the fifth information (i.e., the first time-frequency resource and / or the first antenna port), or the sixth information (the second time-frequency resource and / or the second antenna port) and the bias information of the sixth information.

[0196] In the uplink communication scenario, the network device and the terminal can synchronize the measurement configuration of the reference signal, or the network device and the terminal can predefine the bias determination manner (or bias criterion), and the network device and the terminal can determine the measurement configuration of the reference signal based on the MPC and the bias determination manner (such as a lookup table or performance test) respectively. The measurement configuration of the reference signal includes the pattern of the first reference signal and the fifth information. Then, the terminal can send the reference signal according to the pattern of the first reference signal, and correspondingly, the network device can receive the reference signal according to the pattern of the first reference signal. The network device can perform channel measurement based on the received reference signal and the fifth information to obtain a channel measurement result. Then, the network device can perform phase correction based on the channel measurement result to obtain complete channel information. The complete channel information includes the MPC and the phase.

[0197] In the uplink communication scenario, the network device and the terminal can synchronize the measurement configuration of the reference signal, or the network device and the terminal can predefine the bias determination manner, and the network device and the terminal can determine the measurement configuration of the reference signal based on the MPC and the bias determination manner (such as a lookup table or performance test) respectively. The measurement configuration of the reference signal includes the pattern of the first reference signal and the fifth information. Then, the terminal can send the reference signal according to the pattern of the first reference signal, and correspondingly, the network device can receive the reference signal according to the pattern of the first reference signal. The network device can perform channel measurement based on the received reference signal and the fifth information to obtain a channel measurement result. Then, the network device can perform phase correction based on the channel measurement result to obtain complete channel information. The complete channel information includes the MPC and the phase.

[0198] For example, other implementations of step S407 can also refer to related content in step S303, which will not be described here.

[0199] FIG. 5 is a flow diagram of another communication method provided by an embodiment of the present application. In FIG. 5, the optional steps are represented by dashed boxes, that is, the method can not include one or more of steps S501, S503, S504, S506, or S509.

[0200] The embodiments of the present application take the second device as the network device, the third device as the terminal, and the first device as the third device (that is, the MPC of the first device is the MPC of the terminal) as an example to introduce the communication method provided by the present application in detail. For example, the network device can be a network (NW), and the terminal can be a UE. The functions performed by the terminal in the embodiments of the present application can also be performed by a module (for example, a chip) in the terminal, and the functions performed by the network device in the embodiments of the present application can also be performed by a module (for example, a chip) in the network device.

[0201] Exemplarily, the third information is signal-to-noise ratio information in the embodiments of the present application.

[0202] S501: The network device and the terminal align preconfigured information, and the preconfigured information includes a bias determination manner.

[0203] Exemplarily, the specific implementation of step S501 can also refer to the related content in step S401, which will not be repeated here.

[0204] S502: The network device acquires the MPC of the terminal.

[0205] Exemplarily, the specific implementation of step S502 can also refer to the related content in step S402, which will not be repeated here.

[0206] S503: The terminal acquires the MPC of the terminal.

[0207] Exemplarily, the specific implementation of step S503 can also refer to the related content in step S402, which will not be repeated here.

[0208] S504: The terminal sends antenna dimension information to the network device.

[0209] Exemplarily, the specific implementation of step S504 can also refer to the related content in step S403, which will not be repeated here.

[0210] S505: The network device determines first information based on the MPC of the terminal and the antenna dimension information, and the first information includes first feedback dimension and / or first reference signal density.

[0211] Exemplarily, the specific implementation of step S505 can also refer to the related content in step S404, which will not be repeated here.

[0212] S506: The terminal determines second bias information of the first information based on the signal-to-noise ratio information, the MPC of the terminal and the bias determination manner.

[0213] The second bias information of the first information includes second bias information of the first feedback dimension and / or second bias information of the first reference signal density.

[0214] Exemplarily, the specific implementation of step S506 can also refer to the related content in step S406, which will not be repeated here.

[0215] S507: The terminal sends a first message to the network device, and the first message includes the signal-to-noise ratio information or the second bias information or ID information of the second bias information.

[0216] The ID information of the second bias information can include a table ID and a row ID. For example, the terminal determines the second bias information based on a lookup table, and sends the table ID and the row ID corresponding to the second bias information to the network device.

[0217] S508: The network device determines the first bias information of the first information based on the first message.

[0218] For example, the first message includes signal-to-noise ratio information, and then the network device can determine the first bias information of the first information based on the signal-to-noise ratio information and a bias determination manner. For details, refer to step S406 described above, which will not be repeated here.

[0219] For example, the first message includes the second bias information, and then the network device can determine the first bias information based on the second bias information. For details, refer to the related content of step S303 described above, which will not be repeated here.

[0220] For example, the first message includes ID information of the second bias information, and then the network device can determine the second bias information from a table based on the ID information of the second bias information, and then determine the first bias information based on the second bias information. For details, refer to the related content of step S303 described above, which will not be repeated here.

[0221] S509: The network device and the terminal perform channel measurement and feedback based on the first information and the first bias information of the first information.

[0222] For example, the specific implementation of step S509 can also refer to the related content in step S407, which will not be repeated here.

[0223] It should be noted that the above FIG. 4 and FIG. 5 are described by taking the second device as the network device and the third device as the terminal as an example, wherein the network device determines the first information and the first bias information of the first information, and sends the first information and the first bias information of the first information to the terminal. Alternatively, the technical solution of the present application is also applicable to the case where the third device is taken as the terminal and the second device is taken as the network device, wherein the terminal determines the first information and the first bias information of the first information, and sends the first information and the first bias information of the first information to the network device, and the specific implementation manner is similar to FIG. 4 or FIG. 5.

[0224] The above content describes the method provided by the present application in detail. In order to facilitate the implementation of the above scheme of the present application, the present application further provides a corresponding device or equipment.

[0225] The second device and the third device are divided into function modules according to the method embodiments, for example, each function module can be divided according to each function, or two or more functions can be integrated into one processing module. The integrated module can be realized in the form of hardware or in the form of a software function module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical function division. In actual implementation, another division mode can be used. The communication apparatus of the embodiments of the present application will be described in detail below with reference to FIGS. 6 to 8.

[0226] Referring to FIG. 6, FIG. 6 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 6, the communication apparatus can include a transceiver unit 10 and a processing unit 20.

[0227] In some embodiments of the present application, the communication apparatus can be the second device shown above or a chip or circuit arranged in the second device. The second device can be a network device or a terminal. That is, the communication apparatus can be used to perform the steps or functions performed by the second device in the method embodiments above.

[0228] In one design, the transceiver unit 10 is configured to: obtain first information, the first information including a first reference signal density and / or a first feedback dimension; and send first indication information, the first indication information being used to indicate first offset information of the first information, the first offset information of the first information being related to MPC of the first device; the first information and the first offset information of the first information being associated with measurement configuration of a reference signal.

[0229] In a possible implementation, the first offset information of the first information is further related to performance requirement.

[0230] In a possible implementation, the first offset information of the first information includes offset information of the first reference signal density; and the processing unit 20 is configured to: perform performance testing based on the MPC and the first reference signal density, to obtain a performance testing result corresponding to the first reference signal density; and determine the offset information of the first reference signal density based on the performance testing result corresponding to the first reference signal density and the performance requirement.

[0231] In a possible implementation, the first offset information of the first information includes offset information of the first feedback dimension; and the processing unit 20 is configured to: perform performance testing based on the MPC and the first feedback dimension, to obtain a performance testing result corresponding to the first feedback dimension; and determine the offset information of the first feedback dimension based on the performance testing result corresponding to the first feedback dimension and the performance requirement.

[0232] In a possible implementation, the transceiver 10 is further configured to: send or receive second indication information, the second indication information being used to indicate first bias information of the first information determined based on second information, the second information comprising performance requirement.

[0233] In a possible implementation, the transceiver 10 is configured to obtain third information, the third information comprising signal-to-noise ratio and / or signal-to-interference-and-noise ratio; and the processing unit 20 is configured to: determine, based on the MPC, a first correspondence relationship; determine, based on the third information and the first correspondence relationship, bias information of the first feedback dimension; the first correspondence relationship comprising a correspondence relationship between the third information and the bias information of the first feedback dimension; and / or determine, based on the third information and the first correspondence relationship, bias information of the first reference signal density; the first correspondence relationship comprising a correspondence relationship between the third information and the bias information of the first reference signal density.

[0234] In a possible implementation, the transceiver 10 is further configured to: send or receive third indication information, the third indication information being used to indicate first bias information of the first information determined based on fourth information, the fourth information comprising the first correspondence relationship.

[0235] In a possible implementation, the transceiver 10 is further configured to receive fourth indication information, the fourth indication information being used to indicate second bias information of the first information, the second bias information being related to the MPC; and the processing unit 20 is configured to: determine, based on the second bias information, the first bias information of the first information.

[0236] In a possible implementation, the reference signal comprises a first reference signal, and the processing unit 20 is configured to determine, based on the first reference signal density and the bias information of the first reference signal density, a pattern of the first reference signal; and the transceiver 10 is further configured to send fifth indication information, the fifth indication information being used to indicate the pattern of the first reference signal.

[0237] In a possible implementation, the reference signal comprises a second reference signal, and the processing unit 20 is configured to determine, based on the first reference signal density, a pattern of the second reference signal; the transceiver 10 is further configured to send sixth indication information, the sixth indication information being used to indicate the pattern of the second reference signal; and the processing unit 20 is further configured to determine, based on the bias information of the first reference signal density, bias information of the pattern of the second reference signal; and the transceiver 10 is further configured to send seventh indication information, the seventh indication information being used to indicate the bias information of the pattern of the second reference signal.

[0238] In a possible implementation, the processing unit 20 is configured to determine, based on the first feedback dimension and the bias information of the first feedback dimension, fifth information, the fifth information comprising the first time-frequency resource and / or the first antenna port; and the transceiver 10 is further configured to send eighth indication information, the eighth indication information being used to indicate the fifth information.

[0239] In a possible implementation, the processing unit 20 is configured to determine, based on the first feedback dimension, sixth information, the sixth information comprising a second time-frequency resource and / or a second antenna port; and the transceiver 10 is further configured to send ninth indication information, the ninth indication information being used for indicating the sixth information; the processing unit 20 is configured to determine, based on the bias information of the first feedback dimension, bias information of the sixth information; and the transceiver 10 is further configured to send tenth indication information, the tenth indication information being used for indicating the bias information of the sixth information.

[0240] In the embodiments of the present application, the descriptions of the first information, the first indication information, and the first bias information of the first information can refer to the descriptions in the method embodiments shown in FIGS. 3 to 5, which will not be repeated here.

[0241] It can be understood that the specific descriptions of the transceiver 10 and the processing unit 20 shown in the embodiments of the present application are only examples. For the specific functions or executed steps of the transceiver 10 and the processing unit 20, etc., the above-mentioned method embodiments shown in FIGS. 3 to 5 can be referred to, which will not be described here. In addition, the technical effects of the embodiments of the present application refer to the technical effects in the above-mentioned method embodiments shown in FIGS. 3 to 5, which will not be repeated here for brevity.

[0242] Referring to FIG. 6, in some embodiments of the present application, the communication apparatus can be the third device shown above or a chip or circuit arranged in the third device. The third device can be a network device or a terminal. That is, the communication apparatus can be used to perform the steps or functions performed by the third device in the above method embodiments.

[0243] In one design, the transceiver 10 is configured to: obtain first information, the first information comprising a first reference signal density and / or a first feedback dimension; and receive first indication information, the first indication information being used for indicating first bias information of the first information, the first bias information of the first information being related to MPC of the first device; and the first information and the first bias information of the first information are associated with measurement configuration of a reference signal.

[0244] In a possible implementation, the first bias information of the first information is further related to performance requirement.

[0245] In a possible implementation, the transceiver 10 is further configured to: send or receive second indication information, the second indication information being used for indicating that the first bias information of the first information is determined based on second information, the second information comprising performance requirement.

[0246] In a possible implementation, the transceiver 10 is further configured to: send or receive third indication information, the third indication information being used to indicate first bias information of the first information determined based on fourth information; the fourth information comprises a first correspondence, the first correspondence being related to the MPC, and the first correspondence comprises at least one of the following: a correspondence between the third information and bias information of the first feedback dimension, or a correspondence between the third information and bias information of the first reference signal density; and the third information comprises a signal-to-noise ratio and / or a signal-to-interference-and-noise ratio.

[0247] In a possible implementation, the transceiver 10 is further configured to: send fourth indication information, the fourth indication information being used to indicate second bias information of the first information, the second bias information being related to the MPC.

[0248] In a possible implementation, the reference signal comprises a first reference signal, and the transceiver 10 is further configured to: receive fifth indication information, the fifth indication information being used to indicate a pattern of the first reference signal, the pattern of the first reference signal being related to the first reference signal density and bias information of the first reference signal density.

[0249] In a possible implementation, the reference signal comprises a second reference signal, and the transceiver 10 is further configured to: receive sixth indication information, the sixth indication information being used to indicate a pattern of the second reference signal, the pattern of the second reference signal being related to the first reference signal density; and receive seventh indication information, the seventh indication information being used to indicate bias information of the pattern of the second reference signal, the bias information of the pattern of the second reference signal being related to bias information of the first reference signal density.

[0250] In a possible implementation, the transceiver 10 is further configured to: receive eighth indication information, the eighth indication information being used to indicate fifth information, the fifth information comprising a first time-frequency resource and / or a first antenna port, the fifth information being related to the first feedback dimension and bias information of the first feedback dimension.

[0251] In a possible implementation, the transceiver 10 is further configured to: receive ninth indication information, the ninth indication information being used to indicate sixth information, the sixth information comprising a second time-frequency resource and / or a second antenna port, the sixth information being related to the first feedback dimension; and receive tenth indication information, the tenth indication information being used to indicate bias information of the sixth information, the bias information of the sixth information being related to bias information of the first feedback dimension.

[0252] In the embodiments of the present application, the descriptions about the first information, the first indication information, and the first bias information of the first information can refer to the descriptions in the method embodiments shown in FIG. 3 to FIG. 5, which will not be repeated here.

[0253] It can be understood that the specific description of the transceiver unit 10 and the processing unit 20 shown in the embodiments of the present application is only an example. For the specific functions or executed steps of the transceiver unit 10 and the processing unit 20, reference can be made to the method embodiments shown in FIGS. 3 to 5, which will not be described in detail here. In addition, the technical effects of the embodiments of the present application are described in the method embodiments shown in FIGS. 3 to 5. For the sake of brevity, they will not be described here.

[0254] The network device and the terminal of the embodiments of the present application are introduced above, and the possible product forms of the network device and the terminal are introduced below. It should be understood that any form of product that has the functions of the terminal or network device described in FIG. 6 above falls within the protection scope of the embodiments of the present application. It should also be understood that the following introduction is only an example and does not limit the product form of the communication device of the embodiments of the present application.

[0255] In a possible implementation, in the communication apparatus shown in FIG. 6, the processing unit 20 can be processing circuitry, and the transceiver unit 10 can be communication circuitry. The processing circuitry can be one or more processors, or all or part of a circuit for control or processing in the one or more processors; when the communication apparatus is a terminal device or a network device, the communication circuitry can be a transceiver circuit, which can be a transceiver; when the communication apparatus is a chip or a chip system, the communication circuitry can be an interface circuit; when the communication apparatus is a server, the communication circuitry can be an interface circuit or a transceiver circuit. The transceiver unit 10 can also be a transmitting unit and a receiving unit, the transmitting unit can be a transmitting circuit, and the receiving unit can be a receiving circuit, which are integrated in one device. In the embodiments of the present application, the processing circuitry and the communication circuitry can be coupled, and the connection manner of the processing circuitry and the communication circuitry is not limited in the embodiments of the present application. In the process of executing the above method, the process of transmitting information in the above method can be understood as the process of outputting the above information by the processing circuitry. When the above information is output, the processing circuitry outputs the above information to the communication circuitry, so that the communication circuitry transmits. After the above information is output by the processing circuitry, it can also need to be processed further, and then reach the communication circuitry. Similarly, the process of receiving information in the above method can be understood as the process of receiving inputted above information by the processing circuitry. When the processing circuitry receives the inputted information, the communication circuitry receives the above information and inputs it to the processing circuitry. Furthermore, after the communication circuitry receives the above information, the above information can need to be processed further, and then input to the processing circuitry. In a possible implementation, in the communication apparatus shown in FIG. 6, the processing unit 20 can be one or more processors, and the transceiver unit 10 can be a transceiver, or the transceiver unit 10 can also be a transmitting unit and a receiving unit, the transmitting unit can be a transmitter, and the receiving unit can be a receiver, which are integrated in one device, such as a transceiver. In the embodiments of the present application, the processor and the transceiver can be coupled, and the connection manner of the processor and the transceiver is not limited in the embodiments of the present application. In the process of executing the above method, the process of transmitting information in the above method can be understood as the process of outputting the above information by the processor. When the above information is output, the processor outputs the above information to the transceiver, so that the transceiver transmits. After the above information is output by the processor, it can also need to be processed further, and then reach the transceiver. Similarly, the process of receiving information in the above method can be understood as the process of receiving inputted above information by the processor. When the processor receives the inputted information, the transceiver receives the above information and inputs it to the processor. Furthermore, after the transceiver receives the above information, the above information can need to be processed further, and then input to the processor.

[0256] Referring to FIG. 7, FIG. 7 is another structural schematic diagram of the communication apparatus provided in the embodiments of the present application. As shown in FIG. 7, the communication apparatus provided in the embodiments of the present application can be used to implement the methods described in the method embodiments, and the descriptions in the method embodiments can be referred to. The communication apparatus can be a terminal, or a network device, or a chip therein. Exemplarily, the communication apparatus includes one or more processors 1001. The communication apparatus can further include a memory 1003. Optionally, the communication apparatus can further include a transceiver 1002. In an implementation form, the communication apparatus further includes an input / output device (not shown in FIG. 7).

[0257] The processor 1001 is mainly used for processing communication protocols and communication data, and controlling the whole communication apparatus, executing software programs, and processing data of the software programs. The memory 1003 is mainly used for storing software programs and data. The transceiver 1002 can include a control circuit and an antenna, and the control circuit is mainly used for conversion between a baseband signal and a radio frequency signal, and processing of the radio frequency signal. The antenna is mainly used for receiving and sending radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user.

[0258] When the communication apparatus is powered on, the processor 1001 can read software programs in the memory 1003, interpret and execute instructions of the software programs, and process data of the software programs. When data needs to be sent wirelessly, the processor 1001 performs baseband processing on the data to be sent, and outputs a baseband signal to a radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and sends the radio frequency signal in the form of electromagnetic waves through an antenna. When data is sent to the communication apparatus, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal into data and processes the data.

[0259] In another implementation form, the radio frequency circuit and the antenna can be arranged independently of the processor performing baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication apparatus.

[0260] The processor 1001, the transceiver 1002, and the memory 1003 can be connected through a communication bus.

[0261] Exemplarily, when the communication apparatus is used to execute the steps or methods or functions performed by the second device in the embodiment shown in FIG. 3, the transceiver 1002 can be used to execute step S303 in FIG. 3, and the processor 1001 can be used to execute S301 in FIG. 3, and / or other processes for the technologies described herein.

[0262] For example, when the communication apparatus is configured to perform the steps or methods or functions performed by the third device in the embodiment shown in FIG. 3, the transceiver 1002 can be configured to perform step S303 in FIG. 3, the processor 1001 can be configured to perform S302 in FIG. 3, and / or other processes for the techniques described herein.

[0263] In any of the above implementation manners, the processor 1001 can include a transceiver for implementing the receiving and sending functions. For example, the transceiver can be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuit, interface or interface circuit for implementing the receiving and sending functions can be separate or integrated together. The above transceiver circuit, interface or interface circuit can be used for code / data reading and writing, or the above transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.

[0264] In any of the above implementation manners, the processor 1001 can store instructions, which can be a computer program, running on the processor 1001, to enable the communication apparatus to perform the methods described in the above method embodiments. The computer program can be fixed in the processor 1001, in which case the processor 1001 can be implemented by hardware.

[0265] In an implementation manner, the communication apparatus can include a circuit, which can implement the functions of sending or receiving or communication in the above method embodiments. The processor and the transceiver described in the present application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed-signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and the transceiver can also be manufactured by various IC technology, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), positive channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0266] It can be understood that the communication apparatus shown in the embodiments of the present application can also have more components than those shown in FIG. 7, and the embodiments of the present application do not limit this. The method performed by the processor and the transceiver shown above is only an example, and the specific steps performed by the processor and the transceiver can be referred to the description of the method embodiments above.

[0267] In another possible implementation, the communication apparatus provided by the embodiments of the present application can include one or more processors and memories. Wherein, the processor is configured to execute the program stored in the memory, when the program is executed, the method embodiments above are executed. Exemplarily, the processor and the memory can also be integrated into one device, that is, the processor and the memory can also be integrated together. The specific content of the processor and the memory can also be referred to the related content of the processor 1001 and the memory 1003 in FIG. 7.

[0268] In another possible implementation, the communication apparatus shown in FIG. 7 can also include a processing unit, the processing unit can be one or more logic circuits, and the transceiving unit 10 can be an input / output interface, or a communication interface, or an interface circuit, or an interface, etc. Or the transceiving unit 10 can also be a sending unit and a receiving unit, the sending unit can be an output interface, and the receiving unit can be an input interface, and the sending unit and the receiving unit are integrated into one unit, for example, an input / output interface.

[0269] Referring to FIG. 8, FIG. 8 is another structural schematic diagram of the communication apparatus provided by the embodiments of the present application. As shown in FIG. 8, the communication apparatus shown in FIG. 8 includes a logic circuit 901 and an interface 902. That is, the above-mentioned processing unit can be implemented by the logic circuit 901, and the transceiving unit 10 can be implemented by the interface 902. Wherein, the logic circuit 901 can be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc., and the interface 902 can be a communication interface, an input / output interface, a pin, etc. Exemplarily, FIG. 8 is shown by taking the above-mentioned communication apparatus as a chip, and the chip includes the logic circuit 901 and the interface 902.

[0270] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The specific connection mode of the logic circuit and the interface is not limited by the embodiments of the present application.

[0271] Exemplarily, when the communication apparatus is used to execute the steps or methods or functions executed by the second device in the method embodiments shown in FIG. 3 above, the interface 902 is configured to transmit the first indication information, and the logic circuit 901 is configured to acquire the first information.

[0272] For example, when the communication apparatus is used to perform the steps or methods or functions performed by the third device in the method embodiment shown in FIG. 3, the interface 902 is configured to transmit the first indication information, and the logic circuit 901 is configured to acquire the first information.

[0273] In the embodiments of the present application, the description of the first data and the like can refer to the description in the method embodiment shown in FIG. 3, which will not be repeated here. It can be understood that the specific description of the logic circuit 901 and the interface 902 can also refer to the description of the processing unit and the transceiver unit shown in FIG. 6, which will not be repeated here.

[0274] It can be understood that the communication apparatus shown in the embodiments of the present application can implement the method provided by the embodiments of the present application in the form of hardware, or implement the method provided by the embodiments of the present application in the form of software, and the like, which is not limited in the embodiments of the present application.

[0275] For the specific implementation of each embodiment shown in FIG. 8, it can also refer to the above-mentioned embodiments, which will not be described in detail here.

[0276] The embodiments of the present application also provide a communication system, which includes a network device and a terminal, and the network device and the terminal can be used to perform the method in any one of the above-mentioned method embodiments (FIG. 3 to FIG. 5).

[0277] In addition, the present application also provides a computer program for implementing the operations and / or processes performed by the communication apparatus (such as the above-mentioned network device and terminal) in the method provided by the present application.

[0278] The present application also provides a computer readable storage medium, which stores computer code, when the computer code is run on a computer, so that the computer performs the operations and / or processes performed by the communication apparatus (such as the above-mentioned network device and terminal) in the method provided by the present application.

[0279] The present application also provides a computer program product, which includes computer code or computer program, when the computer code or computer program is run on a computer, so that the operations and / or processes performed by the communication apparatus (such as the above-mentioned network device and terminal) in the method provided by the present application are performed.

[0280] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electric, mechanical or in other forms.

[0281] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of the present application.

[0282] In addition, each functional unit in the various embodiments of the present application can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0283] The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially or substantially, or all or part of the technical solutions, can be embodied in the form of a software product. The computer software product is stored in a computer readable storage medium, and includes several 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 various embodiments of the present application. The aforementioned computer readable 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.

[0284] The above description is merely specific embodiments 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 subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method comprises: obtaining first information, the first information comprising a first reference signal density and / or a first feedback dimension; sending first indication information, the first indication information being used for indicating first bias information of the first information, the first bias information of the first information being related to a multipath element of a first device; the first information and the first bias information of the first information being associated with a measurement configuration of a reference signal.

2. The method of claim 1, wherein, The first bias information of the first information is also related to a performance requirement.

3. The method of claim 2, wherein, The first bias information of the first information comprises bias information of the first reference signal density; the method further comprises: performing a performance test based on the multipath element and the first reference signal density to obtain a performance test result corresponding to the first reference signal density; determining the bias information of the first reference signal density based on the performance test result corresponding to the first reference signal density and the performance requirement.

4. The method according to claim 2 or 3, characterized in that, The first bias information of the first information comprises bias information of the first feedback dimension; the method further comprises: performing a performance test based on the multipath element and the first feedback dimension to obtain a performance test result corresponding to the first feedback dimension; determining the bias information of the first feedback dimension based on the performance test result corresponding to the first feedback dimension and the performance requirement.

5. The method according to claim 3 or 4, characterized in that, The method further comprises: sending or receiving second indication information, the second indication information being used for indicating that the first bias information of the first information is determined based on second information, the second information comprising the performance requirement.

6. The method of claim 1, wherein, The method further comprises: obtaining third information, the third information comprising a signal-to-noise ratio and / or a signal-to-interference-and-noise ratio; determining a first correspondence relationship based on the multipath element; determining the bias information of the first feedback dimension based on the third information and the first correspondence relationship; the first correspondence relationship comprising a correspondence relationship between the third information and the bias information of the first feedback dimension; and / or, determining the bias information of the first reference signal density based on the third information and the first correspondence relationship; the first correspondence relationship comprising a correspondence relationship between the third information and the bias information of the first reference signal density.

7. The method of claim 6, wherein, The method further comprises: sending or receiving third indication information, the third indication information being used for indicating that the first bias information of the first information is determined based on fourth information, the fourth information comprising the first correspondence relationship.

8. The method of claim 1, wherein, The method further comprises: receiving fourth indication information, the fourth indication information being used for indicating second bias information of the first information, the second bias information being related to the multipath element; determining the first bias information of the first information based on the second bias information.

9. The method according to any one of claims 1-8, characterized in that, The reference signal comprises a first reference signal, and the method further comprises: determining a pattern of the first reference signal based on the first reference signal density and the bias information of the first reference signal density; sending fifth indication information, the fifth indication information being used for indicating the pattern of the first reference signal.

10. The method according to any one of claims 1-8, characterized in that, The reference signal comprises a second reference signal, and the method further comprises: determining a pattern of the second reference signal based on the first reference signal density; transmit sixth indication information, the sixth indication information being used for indicating a pattern of the second reference signal; determine, based on the bias information of the first reference signal density, bias information of the pattern of the second reference signal; transmit seventh indication information, the seventh indication information being used for indicating the bias information of the pattern of the second reference signal.

11. The method according to any one of claims 1-10, characterized in that, The method further includes: determine, based on the first feedback dimension and the bias information of the first feedback dimension, fifth information, the fifth information including first time-frequency resources and / or first antenna ports; transmit eighth indication information, the eighth indication information being used for indicating the fifth information.

12. The method according to any one of claims 1-10, characterized in that, The method further includes: determine, based on the first feedback dimension, sixth information, the sixth information including second time-frequency resources and / or second antenna ports; transmit ninth indication information, the ninth indication information being used for indicating the sixth information; determine, based on the bias information of the first feedback dimension, bias information of the sixth information; transmit tenth indication information, the tenth indication information being used for indicating the bias information of the sixth information.

13. A method of communication, comprising: The method includes: obtain first information, the first information including a first reference signal density and / or a first feedback dimension; receive first indication information, the first indication information being used for indicating first bias information of the first information, the first bias information of the first information being related to a multipath element of a first device; the first information and the first bias information of the first information being associated with a measurement configuration of a reference signal.

14. The method of claim 13, wherein, The first bias information of the first information is further related to a performance requirement.

15. The method of claim 14, wherein, The method further includes: transmit or receive second indication information, the second indication information being used for indicating that the first bias information of the first information is determined based on second information, the second information including the performance requirement.

16. The method according to claim 13 or 14, characterized in that The method further includes: transmit or receive third indication information, the third indication information being used for indicating that the first bias information of the first information is determined based on fourth information; The fourth information includes a first correspondence, the first correspondence being related to the multipath element, the first correspondence including at least one of a correspondence between third information and bias information of the first feedback dimension, or a correspondence between the third information and bias information of the first reference signal density; wherein the third information includes a signal-to-noise ratio and / or a signal-to-interference-and-noise ratio.

17. The method of claim 13 or 14, wherein, The method further includes: transmit fourth indication information, the fourth indication information being used for indicating second bias information of the first information, the second bias information being related to the multipath element.

18. The method according to any one of claims 13-17, characterized by, The reference signal includes a first reference signal, and the method further includes: receive fifth indication information, the fifth indication information being used for indicating a pattern of the first reference signal, the pattern of the first reference signal being related to the first reference signal density and bias information of the first reference signal density.

19. The method according to any one of claims 13-17, characterized by, The reference signal includes a second reference signal, and the method further includes: receive sixth indication information, the sixth indication information being used for indicating a pattern of the second reference signal, the pattern of the second reference signal being related to the first reference signal density; receive seventh indication information, the seventh indication information being used for indicating offset information of a pattern of the second reference signal, the offset information of the pattern of the second reference signal being related to the offset information of the first reference signal density.

20. The method of any one of claims 13-19, wherein, The method further includes: receive eighth indication information, the eighth indication information being used for indicating fifth information, the fifth information comprising first time-frequency resources and / or first antenna ports, the fifth information being related to the first feedback dimension and offset information of the first feedback dimension.

21. The method of any one of claims 13-19, wherein, The method further includes: receive ninth indication information, the ninth indication information being used for indicating sixth information, the sixth information comprising second time-frequency resources and / or second antenna ports, the sixth information being related to the first feedback dimension; receive tenth indication information, the tenth indication information being used for indicating offset information of the sixth information, the offset information of the sixth information being related to the offset information of the first feedback dimension.

22. A communications device, characterized by comprising a module or a unit for performing the method of any one of claims 1 to 21.

23. A communications device, characterized by comprising a processor for implementing the method of any one of claims 1 to 21 by means of logic circuit or executing code instructions.

24. A readable storage medium characterized by, a non-transitory computer-readable medium storing program, the program being executed by one or more processors to cause an apparatus comprising the one or more processors to perform the method of any one of claims 1 to 21.

25. A computer program product, characterised in that, a computer program product, which when run on an electronic device, causes the electronic device to perform the method of any one of claims 1 to 21.

26. A communication system, characterized by comprising: a first communication device for performing the method of any one of claims 1 to 12 and a second communication device for performing the method of any one of claims 13 to 21.

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