Technology for conveying beam information

Abstract

The present application relates to technologies for communicating beam information, and the disclosed technologies include technologies for facilitating the operation of a multi-antenna communication system. The disclosed technologies can be implemented to provide a method for wireless communication, the method including receiving, by a user device, an indication of an association between a target resource at the user device and a plurality of reference resources. The association includes an attribute of a communication channel to and / or from the user device, and wherein at least one attribute of the communication channel is different between the plurality of reference resources, and the wireless communication is performed using the indication.

Description

[0001] This application is a divisional application of the Chinese patent application with application number "201780090444.0", application date "May 5, 2017", and title "Technology for conveying beam information". Technical Field

[0002] This document relates to systems, devices, and techniques for wireless communications. Background Art

[0003] There are currently efforts underway to define the next generation of communication networks that provide greater deployment flexibility, support for multiple devices and services, and different technologies for efficient bandwidth utilization. Summary of the invention

[0004] This document describes various techniques and, among other things, describes techniques for facilitating operation of a multiple-antenna communication system.

[0005] In one aspect, the disclosed technology can be implemented to provide a method for wireless communication, the method comprising receiving, by a user device, an indication of an association between a target resource at the user device and X reference resources (where X is an integer greater than 1), wherein the association comprises an attribute of a communication channel to and / or from the user device, and wherein at least one attribute of the communication channel is different between the multiple reference resources. In some implementations, the method further comprises performing wireless communication using the indication.

[0006] In another aspect, the disclosed technology may be implemented to provide a method of wireless communication, the method comprising transmitting to a user device an indication of an association between a target resource at the user device and X reference resources (where X is an integer greater than 1), wherein the association comprises an attribute of a communication channel to and / or from the user device, and wherein at least one attribute of the communication channel is different between the plurality of reference resources. In some implementations, the method further comprises performing a transmission using at least some of the plurality of reference resources to transmit a signal to the user device.

[0007] The details of one or more implementations are set forth in the accompanying claims, the drawings, and the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 An example of a wireless communication network is shown.

[0009] Figure 2 An example of a wireless communication device is shown.

[0010] Figure 3 An example of transmission between a base station and a user equipment is shown.

[0011] Figure 4 is a flow chart for an example wireless communication method.

[0012] Figure 5 is a flow chart for an example wireless communication method.

[0013] Figure 6 is a flow chart for an example wireless communication method.

[0014] Figure 7 is a flow chart for an example wireless communication method.

[0015] Like reference numerals in the various drawings indicate like elements. DETAILED DESCRIPTION

[0016] The 3rd Generation Partnership Project (3GPP) has begun the standardization process for new radio access technologies for fifth-generation wireless systems. The new technology will consider frequency ranges up to 100 GHz. Compared with low-frequency communications, such as in the 3 GHz and 5 GHz bands, high-frequency communications, such as those above 6 GHz, suffer significant path loss and penetration loss. One solution to this problem is to deploy large antenna arrays, such as antenna arrays with many antennas, to achieve high beamforming gain to compensate for the loss. Since the wavelength of high-frequency signals is shortened relative to the wavelength of low-frequency signals, using large antenna arrays in high-frequency systems can be a practical solution. For about 30 / 70 GHz, up to 1024 Tx antennas can be used. When the number of antennas used is large, it is unrealistic to fully utilize MIMO gain through all-digital beamforming in the baseband due to problems in hardware cost, power consumption, and standardization complexity.

[0017] The techniques described in this document can be used to implement wireless devices that overcome the above and other problems. For example, using the disclosed techniques, a multi-antenna scheme using analog / hybrid (e.g., analog and digital) beamforming for a new radio (NR) interface can be implemented in a device that performs high-frequency transmission and reception.

[0018] Figure 1 An example wireless communication network 100 is shown. The network 100 includes a base station BS 102 and a plurality of user devices 106 that can communicate with each other via a transmission medium 104. Transmissions from the BS 102 to the devices 106 are generally referred to as downlink or downstream transmissions. Transmissions from the devices 106 to the BS 102 are generally referred to as uplink or upstream transmissions. The transmission medium 104 is generally a wireless (air) medium. The BS 102 may also be communicatively coupled to other base stations or other devices in the network via a backhaul or access network connection 112.

[0019] Figure 2is a block diagram of an example of a wireless communication device 200. The device 200 includes a processor 210 that can be configured to implement one of the techniques described herein, transceiver electronics 215 capable of transmitting or receiving signals using one or more antennas 220, and one or more memories 205 and / or data storage devices that can be used to store instructions that can be executed by the processor 210. As discussed throughout this document, the number of antennas 220 can be large (e.g., 8, 16, 32, or 64 or more), and such a device can benefit from the techniques described herein.

[0020] Reference signals are commonly used in wireless communications for various reasons, such as to aid in signal acquisition, channel estimation, signal precoding, etc. Certain types of reference signals may undergo the same transmitter-side processing (e.g., precoding) as the data, while certain other types of reference signals may be combined with other data after the data has undergone at least some processing at the transmitter.

[0021] For example, in 4G LTE, the transmission of certain reference signals is transparent to the receiver. For example, the precoder / beamformer for data transmission based on a demodulation reference signal (DMRS) is transparent to the user equipment (UE) because the beamformer used for data transmission is the same as the beamformer used for transmission of the reference signal, and thus, the DMRS and the UE do not know which beamformer is used for data transmission. Due to the transparency property, there is no need to explicitly indicate the beamformer. Instead, implicit information about channel properties, such as the quasi-co-location (QCL) assumption, is indicated to the UE to support data transmission from base stations in different locations. This means that a subset of the channel properties observed from the reference resource can be assumed to be the same as a subset of the channel properties observed from the target resource (e.g., DMRS). In order to support multi-user multiple input multiple output (MU-MIMO) transmission, the UE can detect possible interference from the DMRS port and thus perform interference suppression. No additional indication from the base station is required. This method is applicable to LTE because the design of LTE assumes that the receiver uses digital receiver weights to suppress interference, which means that the weights can be adaptively changed after receiving the digital baseband signal.

[0022] Unlike LTE, since analog / hybrid beamforming can be used at the UE, the next generation UE that can operate at higher frequencies can be expected to determine the analog receive beam weights before receiving the signal. Therefore, if interference suppression / cancellation is done in the analog domain, the UE should know the interference information in advance.

[0023] In some embodiments, an indication of a spatial QCL assumption may be supported between one or more DL RS antenna ports and one or more DMRS antenna ports of a DL data channel. However, it is not known how such a spatial QCL assumption relates, i.e., if multiple antenna ports are associated, whether it is an interfering channel or a composite channel for multiple beams. The techniques described in this document can be used to build transmitters and receivers that address these and other issues.

[0024] Example of multi-beam indication

[0025] To support multi-beam transmission on a target resource (e.g., a DMRS port), multiple reference resources (e.g., CSI-RS resources) may be associated with one target resource. The association may be established by a QCL assumption that reflects channel properties in at least one of the following aspects: Doppler spread, Doppler shift, delay spread, average delay, average gain, angle of arrival, angle of departure, angular spread, or spatial correlation. Multiple groups of these QCL assumptions are associated with one target resource so that the channel observed from the target antenna port has channel properties similar to the composite channel of multiple CSI-RS ports / resources. When the reference antenna port and the target antenna port are in different duplex directions (i.e., UL and DL), their association refers to the reciprocal channel observed from the reference resource.

[0026] Figure 3 An example configuration 300 is shown for communication between a base station 302 and a user equipment 304. The base station 302 may be configured as follows: Figure 2 102. User equipment 304 may be similar to user equipment 106 and may be implemented as depicted in FIG. Figure 2 As described in Figure 3 As depicted, base station 302 may transmit signals using multiple resources (eg, CSI-RS ports), and user equipment 304 may receive the signals on target resources (eg, receive resources, such as DMRS ports).

[0027] If CSI-RS resource 1 and CSI-RS resource 2 are associated with one DMRS port in terms of arrival angle, then two arrival angles are expected to be observed in the DMRS port (corresponding to two beams transmitted from the two CSI-RS resources). The signals associated with the two beams may have two different DMRS sequences, but they are on the same DMRS port. In some embodiments, CSI-RS resource 1 and CSI-RS resource 2 may correspond to the same layer of data associated with the DMRS port.

[0028] If CSI-RS resource 1 and CSI-RS resource 2 are associated with one DMRS port in terms of arrival angle, then two arrival angles are expected to be observed in the DMRS port (corresponding to two beams transmitted from the two CSI-RS resources). The signals associated with the two beams may have two different DMRS sequences, but they are on the same DMRS port. In some embodiments, CSI-RS resource 1 and CSI-RS resource 2 correspond to different layers of data associated with the DMRS port.

[0029] If CSI-RS resource 1 and CSI-RS resource 2 are associated with CSI-RS resource 3 in terms of arrival angle, then two arrival angles (corresponding to the two CSI-RS resources) are expected to be observed in CSI-RS resource 3.

[0030] Each of the multiple reference resources associated with one target resource may be classified as a channel part or an interference part. The UE is then indicated which resources belong to the channel part and which resources belong to the interference part.

[0031] For example, in the example discussed above, the BS may indicate to the UE that CSI-RS resource 1 and CSI-RS resource 2 are the channel part and the interference part, respectively. If CSI-RS resource 1 and CSI-RS resource 2 are associated with one DMRS port in terms of arrival angle, then two arrival angles (corresponding to two CSI-RS resources) are expected to be observed in the DMRS port, where the arrival angle corresponding to CSI-RS resource 1 is the arrival angle of the desired signal, and the arrival angle corresponding to CSI-RS resource 2 is the arrival angle of the interference.

[0032] As another example, the BS may indicate to the UE that CSI-RS resource 1 and CSI-RS resource 2 are the channel part and the interference part, respectively. If CSI-RS resource 1 and CSI-RS resource 2 are associated with CSI-RS resource 3 in terms of arrival angle, two arrival angles (corresponding to the two CSI-RS resources) are expected to be observed in CSI-RS resource 3, wherein the arrival angle corresponding to CSI-RS resource 1 is the arrival angle of the desired signal, and the arrival angle corresponding to CSI-RS resource 2 is the arrival angle of the interference.

[0033] In some embodiments, if sounding reference signal (SRS) resource 1 and SRS resource 2 are associated with one UL DMRS port by indication, the UE performs multi-beam / layer transmission on the DMRS port using the same precoder(s) / beams as those of the two SRS resources on the UL DMRS port.

[0034] In some embodiments, if CSI-RS resource 1 and CSI-RS resource 2 are associated with one UL DMRS port by indication, the UE uses one or more identical receive precoders / beams from these two CSI-RS resources to generate reciprocal beams on the UL DMRS port to perform multi-beam / layer transmission on the DMRS port.

[0035] In some embodiments, the BS may also indicate to the UE the power offset of each channel / interference component corresponding to each CSI-RS resource.

[0036] Multi-beam reception

[0037] To support multi-beam reception after receiving a multi-beam indication, the UE shall use the information obtained from the indication to perform subsequent reception and measurements of the channel and interference.

[0038] Upon receiving the indication, the UE knows the channel observed in the DMRS port, where the arrival angle corresponding to CSI-RS resource 1 is the arrival angle of the desired signal, and the arrival angle corresponding to CSI-RS resource 2 is the arrival angle of interference.

[0039] If the target resource is DMRS, the UE steers the receive analog beam weights toward the angle of arrival of the desired signal to receive the channel portion of the signal and perform channel estimation for demodulation. At the same time, the receive beam weights are designed to null the interference at the angle of arrival of the interference. The UE then performs demodulation based on these channel and interference assumptions.

[0040] If the target resource is a CSI-RS for CSI acquisition, the UE can steer the receive beam weights toward the angle of arrival of the desired signal to receive the channel portion of the signal and perform channel estimation for CSI acquisition. At the same time, the receive beam weights can be designed to null the interference at the angle of arrival of the interference. The UE can then report the CSI based on these channel and interference assumptions to the BS.

[0041] In some embodiments, the UE decides a receive beam based on a power offset of a channel interference component corresponding to a CSI-RS resource.

[0042] Sample Information

[0043] Some examples of information that may be included in the report to ensure sync-up between the BS and UE for beam indication and reception procedures include:

[0044] -The number of components that the UE can use for signal enhancement.

[0045] -The number of components that the UE can use for interference nulling.

[0046] - The number of interference beams that the UE can nullify (nulling ability).

[0047] - The structure of the analog receive beamformer reported by the UE or indicated to the UE. For example, the Kronecker analog beamformer Among them, there are a total of D factors, and M (< D) of the D factors can be used for interference nulling, while (D - M) are used for signal enhancement.

[0048] - The codebook for signal enhancement and the codebook for interference nulling.

[0049] Figure 4 An example process 400 of multi-beam indication and reception is shown.

[0050] At 402, the BS can perform a beam scanning operation by transmitting multiple reference resources such as CSI-RS. Beam scanning may be useful in the initial establishment of the beam pattern.

[0051] At 404, the BS can perform multi-beam transmission on one target antenna port. The BS indicates information about the association between the multiple reference resources and the target antenna port.

[0052] The BS can indicate to the user equipment which of the multiple reference resources are associated with the channel portion corresponding to the data delivered (or to be delivered) to the user. The BS can indicate to the user which of the multiple reference resources are associated with the (possible or potential) interference portion corresponding to the data delivered (or to be delivered) to another user.

[0053] At 406, the UE determines the analog receive weights based on the beam indication and performs the reception of the RS for CSI acquisition or demodulation. The BS can send the beam indication to the UE based on this ability. For example, this ability can include the maximum number of reference resources associated with the data and the maximum number of reference resources associated with the interference. The UE can determine the analog receive weights based on the beam indication and perform the reception of the RS for CSI acquisition or demodulation.

[0054] Figure 5 An example process 500 for reporting interference cancellation ability is shown.

[0055] At 502, the UE reports to the BS the structure of the analog beamformer implemented at the UE, including its interference nulling ability.

[0056] At 504, the UE reports to the BS the structure of the analog beamformer implemented at the UE, including its interference nulling ability.

[0057] At 506, the UE determines a simulated reception weight according to the beam indication, and performs reception of the RS for CSI acquisition or demodulation.

[0058] Figure 6 A flow chart of a wireless communication method 600 is shown. The method 600 may be implemented at a base station. The method 600 includes receiving, by a user equipment, at 602, an indication of an association between a target resource at the user equipment and a plurality of reference resources; wherein the association includes an attribute of a communication channel to and / or from the user equipment, and wherein at least one attribute of the communication channel is different between the plurality of reference resources. The method 600 includes performing further wireless communication using the information at 604. As described herein, the information may be used to selectively filter out unwanted interference or to filter to receive a desired signal.

[0059] In some embodiments, X (X is an integer greater than 1) number of multiple resources may be indicated in the association. Each of the X reference resources may correspond to a channel portion or an interference portion of a target resource, which supports at least one of the following data or reference transmissions: (1) All X reference resources correspond to channel portions of the same layer of data or reference signal transmission, (2) Different reference resources may correspond to channel portions of different layers of data or reference signal transmission, (3) X1 (where X1<=X) of the X reference resources correspond to the channel portion of the target resource. The remaining (X-X1) reference resources correspond to the interference portion of the target resource.

[0060] In some embodiments, each reference or target resource may be one of the following types of resources: (1) a reference signal resource comprising one or more ports, (2) an antenna port or a group of antenna ports of a reference signal resource having the same scrambling sequence; (3) an antenna port or a group of antenna ports of a reference signal resource having multiple scrambling sequences.

[0061] Method 600 may also include: reporting from the user equipment at least one of the following information about the user equipment related to the information in the indication: (1) the maximum number of reference resources supported by the user equipment; (2) which channel attributes are assumed to be the same in the reference resources; (3) which channel attributes may be different in the reference resources; and (4) what type of reference resources may be indicated.

[0062] In some embodiments, the method 600 may further include: based on the received information about the association, performing a measurement on the first received signal by distinguishing a channel portion of the first received signal from an interference portion of the first received signal based on the information; and recovering data from the second received signal using the result of the measurement. The channel portion may correspond to user data intended to be received by the user equipment, and the interference portion may correspond to data being transmitted to another user equipment. In various embodiments, the channel portion and the interference portion in the target resource may be distinguished by at least one of the following: (1) different scrambling sequences in the target resource; (2) different antenna ports in the target resource; and (3) different antenna port groups in the target resource.

[0063] The method 600 may also include: based on the received information about the association, performing measurement on the first received signal by distinguishing the channel portion of the first received signal from the interference portion of the first received signal based on the information; and reporting channel state information using the measurement result. The user equipment may perform data or reference signal transmission on the target resource based on the association.

[0064] In some embodiments, the association may imply that the channel through which the symbol on the target antenna port is transmitted can be inferred from the multiple channels through which other symbols on the reference antenna port are transmitted. In some embodiments, multiple reference resources associated with the same target receive resource have the same channel properties relative to a subset of the channel properties. For example, the subset of channel properties may include Doppler spread and Doppler shift.

[0065] In some embodiments, the indication includes power information associated with each of the plurality of reference resources. For example, in some embodiments, the power information includes one or more power offsets between one or more channel portions or one or more interference portions of the target resource associated with the plurality of reference resources.

[0066] Figure 7 A flow chart of a wireless communication method 700 is shown. The method 700 may be implemented at a base station. The method 700 includes transmitting (704) to a user equipment an indication of an association between a target resource at the user equipment and a plurality of reference resources, wherein the association includes an attribute of a communication channel to and / or from the user equipment, and wherein at least one attribute of the communication channel is different between the plurality of reference resources. The method 700 may also include performing (706) wireless communication using at least some of the plurality of reference resources to transmit a signal to the user equipment. The operation 706 may be the reception of a wireless message or the transmission of a wireless signal.

[0067] In some embodiments, a wireless communication device including a memory and a processor may be implemented such that the memory stores instructions and the processor is configured to read the instructions from the memory and implement the methods or steps described herein, such as method 600 or method 700.

[0068] It will be understood that the present document discloses the following technique: wherein information related to multiple reference resources is indicated by the BS to the UE for association with a target resource (i.e., a target antenna port) in terms of channel attributes (including at least one of the following channel attributes: Doppler spread, Doppler shift, delay spread, average delay, average gain, angle of arrival, angle of departure, angular spread, spatial correlation).

[0069] In some embodiments, the information includes information for distinguishing which reference resources belong to the channel part and which reference resources belong to the interference part.

[0070] In some embodiments, the UE performs channel and interference measurements based on the reception weights determined according to the indication. The UE may perform data demodulation based on the indicated channel and interference assumptions. The UE may perform CSI feedback based on the indicated channel and interference assumptions.

[0071] It will also be appreciated that using the disclosed technique, the UE reports the number of components that the UE can use for signal enhancement and the number of components that the UE can use for interference nulling. The structure of the analog reception beamformer reported by the UE or indicated to the UE. In some embodiments, the Kronecker analog beamformer wherein there are a total of D factors, and M (< D) of the D factors can be used for interference nulling, and (D - M) are used for signal enhancement.

[0072] The disclosed and other embodiments, modules and functional operations described in this document may be implemented in digital electronic circuits or computer software, firmware or hardware (including the structures disclosed in this document and their equivalents) or a combination of one or more thereof. The disclosed and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by a data processing device or for controlling the operation of the data processing device. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, a memory device, a material composition that affects a machine-readable propagation signal, or a combination of one or more thereof. The term "data processing device" encompasses all devices, equipment and machines for processing data, including, for example, a programmable processor, a computer or multiple processors or computers. In addition to hardware, the device may also include code that creates an execution environment for the computer program in question, such as code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more thereof. A propagated signal is an artificially generated signal, such as a machine-generated electrical, optical or electromagnetic signal, which is generated to encode information for transmission to a suitable receiver device.

[0073] A computer program (also referred to as a program, software, software application, script, or code) may be written in any form of programming language (including compiled or interpreted languages) and may be deployed in any form, including a stand-alone program or a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program may be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or portions of code). A computer program may be deployed to execute on one computer or on multiple computers located at one site or distributed over multiple sites and interconnected by a communications network.

[0074] The processes and logic flows described in this document may be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows may also be performed by, and apparatus may be implemented as, special purpose logic circuits such as FPGAs (field programmable gate arrays) or ASICs (application specific integrated circuits).

[0075] Processors suitable for executing computer programs include, for example, both general-purpose and special-purpose microprocessors and any one or more processors of any kind of digital computer. Typically, the processor will receive instructions and data from a read-only memory or a random access memory or both. The basic elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or be operatively coupled to receive data from or transfer data to or both of mass storage devices. However, a computer need not have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices, such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD ROM and DVD-ROM disks. The processor and memory may be supplemented by or incorporated into a dedicated logic circuit.

[0076] Although this document contains many details, these details should not be interpreted as limitations on the scope of the claimed invention or the invention that may be claimed, but rather as descriptions of features specific to a particular embodiment. Certain features described in this document in the context of separate embodiments may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments or in any suitable sub-combination, respectively. Moreover, although the features may be described above as working in certain combinations and even initially claimed as such, one or more features in the claimed combination may be cut out of the combination in some cases, and the claimed combination may be directed to a sub-combination or a variation of the sub-combination. Similarly, although operations are depicted in a particular order in the accompanying drawings, this should not be understood as requiring such operations to be performed in the particular order shown or in a continuous order, or to perform all of the operations shown to achieve the desired result.

[0077] Only some examples and implementations are disclosed. Variations, modifications and enhancements may be made to the described examples and implementations and other implementations based on what is disclosed.

Claims

1. A method for wireless communication, comprising: receiving, by a user equipment, an indication of an association between X reference resources and a target resource, wherein X is an integer greater than 1, wherein the association comprises a property of a communication channel to and / or from the user equipment, and wherein at least one property of the communication channel is different between the X reference resources, Each of the X reference resources corresponds to a channel portion or an interference portion of the target resource, and wherein the indication comprises power information about a channel portion or an interference portion of the target resource associated with each of the X reference resources, and wherein the power information comprises a power offset between the channel portion or the interference portion of the target resource associated with the X reference resources.

2. The method according to claim 1, wherein: The X reference resources support at least one of the following data or reference signal transmission characteristics: all X reference resources correspond to channel parts of the same layer of data or reference signal transmission, different reference resources correspond to the channel parts of different layers of the data or reference signal transmission, X1 of the X reference resources correspond to the channel parts of the target resource and the remaining (X-X1) reference resources correspond to the interference part of the target resource, where X1 is an integer less than or equal to X.

3. The method according to claim 1, wherein: Each reference resource and target resource is one of the following types of resources: a reference signal resource comprising one or more ports, an antenna port or an antenna port group of reference signal resources having the same scrambling sequence; an antenna port or an antenna port group of reference signal resources having multiple scrambling sequences.

4. The method according to claim 2, further comprising: The channel portion and the interference portion in the target resource are distinguished based on at least: different scrambling sequences in the target resource, or different antenna ports in the target resource, or different antenna port groups in the target resource.

5. The method according to any one of claims 1 to 4, further comprising: performing, based on the received indication of the association, measurements on the first received signal by distinguishing a channel portion of the first received signal from an interference portion of the first received signal based on the indication; and Data is restored from a second received signal using a result of the measurement, wherein the channel portion corresponds to data of the user equipment and the interference portion corresponds to signals of other users.

6. The method according to any one of claims 1 to 4, further comprising: performing, based on the received indication of the association, measurements on the first received signal by distinguishing a channel portion of the first received signal from an interference portion of the first received signal based on the indication; and Channel state information CSI is reported using the measurement result.

7. The method according to any one of claims 1 to 4, further comprising: Based on the received indication of the association, data or reference signal transmission is performed by the user equipment on the target resource.

8. The method according to any one of claims 1 to 4, wherein: The indication includes information about one or more of the following association types: a. an association between the X reference resources and the target resource includes information about at least one of the following channel attributes: Doppler spread, Doppler shift, delay spread, average delay, average gain, angle of arrival, angle of departure, angular spread, spatial correlation, reciprocal channel attributes, or beam correspondence, b. an association between the X reference resources and the target resource such that the target resource represents a composite channel, wherein the composite channel is a combination of channels observed from the X reference resources.

9. The method according to claim 8, wherein: The association means that the channel through which the symbol on the target antenna port is transmitted can be inferred from the multiple channels through which other symbols on the reference antenna port are transmitted.

10. The method according to claim 8, wherein: With respect to the subset of channel properties, the X reference resources associated with the same target reception resource have the same channel property.

11. The method according to claim 10, wherein: The subset of channel properties includes Doppler spread and Doppler shift.

12. The method according to claim 1, further comprising: The report from the user equipment includes a report of at least one of the following information of the user equipment related to the information in the indication: the maximum number of reference resources that the user can support; the same channel attributes between the reference resources, the different channel attributes between the reference resources, and the type of reference resources that can be indicated.

13. The method according to claim 12, wherein: The report includes information about a first amount of signal processing resources supported by the user equipment for signal enhancement.

14. The method according to claim 12, wherein: The report includes information about a second amount of signal processing resources supported by the user equipment for interference nulling.

15. The method according to claim 12, further comprising: receiving a first receive signal using a Kronecker beamformer, and The second amount of signal processing resources available for interference nulling includes a plurality of factors of the Kronecker beamformer available for interference nulling.

16. The method according to claim 1, further comprising: A feedback message is provided for updating an indication of the association between the target resource at the user equipment and the X reference resources.

17. The method according to claim 16, wherein: The feedback message identifies a first codebook for signal enhancement and a second codebook for interference nulling.

18. A method of wireless communication, comprising: transmitting to a user equipment an indication of an association between X reference resources and a target resource, wherein X is an integer greater than 1, wherein the association comprises an attribute of a communication channel to and / or from the user equipment, and wherein at least one attribute of the communication channel is different between the X reference resources, and Each of the X reference resources corresponds to a channel portion or an interference portion of the target resource, and wherein the indication comprises power information about a channel portion or an interference portion of the target resource associated with each of the X reference resources, and wherein the power information comprises a power offset between the channel portion or the interference portion of the target resource associated with the X reference resources.

19. The method according to claim 18, wherein: Each of the X reference resources corresponds to a channel portion or an interference portion of the target resource, which supports at least one of the following data or reference signal transmission characteristics: all X reference resources correspond to the channel portion of the same layer of data or reference signal transmission, different reference resources correspond to the channel portions of different layers of the data or reference signal transmission, X1 of the X reference resources correspond to the channel portion of the target resource and the remaining (X-X1) reference resources correspond to the interference portion of the target resource, where X1 is an integer less than or equal to X.

20. The method according to claim 18, wherein: Each reference resource and target resource is one of the following types of resources: a reference signal resource comprising one or more ports, an antenna port or an antenna port group of reference signal resources having the same scrambling sequence; an antenna port or an antenna port group of reference signal resources having multiple scrambling sequences.

21. The method of claim 18, further comprising: The channel portion and the interference portion in the target resource are distinguished based on at least the following: different scrambling sequences in the target resource, or different antenna ports in the target resource, or different antenna port groups in the target resource.

22. The method according to any one of claims 18 to 21, wherein Data or reference signal transmission is performed by the user equipment on target resources based on the indication regarding the association.

23. The method of claim 18, further comprising: Transmission using at least some of the X reference resources is performed to transmit a signal to the user equipment.

24. The method according to any one of claims 18 to 21, wherein: The indication includes information about one or more of the following association types: a. an association between the X reference resources and the target resource includes information about at least one of the following channel attributes: Doppler spread, Doppler shift, delay spread, average delay, average gain, angle of arrival, angle of departure, angular spread, spatial correlation, reciprocal channel attributes, or beam correspondence, b. an association between the X reference resources and the target resource such that the target resource represents a composite channel, wherein the composite channel is a combination of channels observed from the X reference resources.

25. The method of claim 18, further comprising: A report from a user equipment is received, wherein the indication is based in part on the report.

26. The method according to claim 25, wherein: The report includes information regarding a first amount of signal processing resources available for signal enhancement and a second amount of signal processing resources available for interference nulling.

27. The method according to claim 18, wherein: The power information includes a power offset between a channel portion or an interference portion of the target resource associated with the X reference resources.

28. A wireless communication device comprising a memory and a processor, wherein: The memory is configured to store processor-executable code, and the processor is configured to read the code from the memory and implement the method according to any one of claims 1 to 27.

29. A computer program product comprising a computer readable medium having stored thereon codes which, when executed, cause a processor to implement the method according to any one of claims 1 to 27.

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