WO2018127061A1

WO2018127061A1 - Data processing method, user equipment, and wireless access device

Info

Publication number: WO2018127061A1
Application number: PCT/CN2018/071260
Authority: WO
Inventors: 纪刘榴; 黄逸; 李元杰
Original assignee: 华为技术有限公司
Priority date: 2017-01-04
Filing date: 2018-01-04
Publication date: 2018-07-12
Also published as: CN108270473A; CN108270473B

Abstract

An embodiment of the present invention provides a data processing method. In the method, in a process in which a data stream is transmitted by using a precoding technology, when a user equipment feeds back long-term or broadband channel estimation condition according to an instruction of a wireless access device, the user equipment feeds back a precoding matrix indication obtained by performing long-term or broadband channel estimation in which at least two beam resources are combined as a resource group; the precoding matrix indication of long-term or broadband estimation is not obtained by separately performing the long-term or broadband channel estimation on each beam resource. Accordingly, in a case in which beam resources of the user equipment are increased, the quantity of signaling of the user equipment is not multiplied, the precoding process of the data stream is implemented, and signaling overheads of the user equipment is also decreased.

Description

Data processing method, user equipment and wireless access device

This application claims the priority of the Chinese patent application filed on January 4, 2017, the Chinese Patent Office, the application number is 201710005786.X, and the application name is "a data processing method, user equipment and wireless access equipment". The content is incorporated herein by reference.

Technical field

The embodiments of the present invention relate to the field of wireless communications, and in particular, to a data processing method, a user equipment, and a wireless access device.

Background technique

In a wireless communication system, a link from a wireless access device (eg, a base station) to a user equipment (UE) direction is a downlink, and a link from the user equipment to the direction of the wireless access device For the uplink. The wireless access device transmits a data stream (control signaling or service data) to the user equipment through a precoding technology, so that the transmission quality of the data stream on the downlink is as best as possible.

In a precoding technology based on a precoding codebook, a precoding codebook including at least one precoding matrix is pre-defined by the 3rd partnership project (3GPP) protocol, and is pre-configured in the Wireless access device and the user equipment. The user equipment performs channel estimation on a beam resource on the downlink, and feeds back a channel estimation precoding matrix indicator (PMI) to the wireless access device, so that the wireless connection The precoding matrix indicated by the ingress device with reference to the user equipment feedback indicates a precoding matrix used when the radio access device sends a data stream to the user equipment, and the method is called closed loop precoding. For a case where a codebook is at least two levels, the user equipment feeds back to the radio access device a precoding matrix and a short-term or narrow-band (subband) channel estimation for each beam resource long-term or wideband channel estimation of the channel estimation. The resulting precoding matrix indicates that the radio access device refers to the at least two precoding matrix indications to determine a precoding matrix to use when transmitting the data stream. It can be seen that, in the foregoing closed-loop precoding manner, the user equipment feeds back a precoding matrix obtained by estimating a long-term or wideband channel on each beam resource and a precoding matrix indication obtained by estimating a short-term or narrow-band channel, in the user equipment. When multiple beam resources are configured, the feedback signaling of the user equipment will be multiplied.

Summary of the invention

The embodiment of the invention provides a data processing method, which can reduce the waste of signaling overhead of the user equipment.

A first aspect of the embodiments of the present invention provides a data processing method, including the following content.

The wireless access device sends the first information to the user equipment, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beam resources; The precoding matrix of the first beam resource indicates a corresponding long-term or wide-band channel feature, and the precoding matrix of each second beam resource of the at least two second beam resources indicates a corresponding short-term or narrow-band channel feature;

Receiving, by the wireless access device, second information sent by the user equipment, where the second information indicates a precoding matrix indication of the first beam resource;

Obtaining, by the wireless access device, a precoding matrix indication of each second beam resource of the at least two second beam resources;

Determining, by the radio access device, a precoding matrix of the data stream according to a precoding matrix indication of the first beam resource and a precoding matrix indication of each second beam resource of the at least two second beam resources;

Determining, by the wireless access device, a precoded data stream according to a precoding matrix of the data stream;

The wireless access device sends the precoded data stream to the user equipment.

Applying the technical solution provided by the first aspect of the embodiments of the present invention, in a process of transmitting a data stream by using a precoding technology, the user equipment responds to the long-term or wide-band channel estimation according to the indication of the wireless access device, and the feedback is at least two. The beam resources are combined to form a precoding matrix indication of the long-term or wide-band channel estimation of a resource group (first beam resource) without separately feeding back the long-term or wideband channel estimation of each beam resource (second beam resource). A precoding matrix indication of long term or wideband channel estimates is obtained. Therefore, in the case that the number of the beam resources of the user equipment increases, the signaling of the user equipment does not increase exponentially, and the precoding process of the data stream is also implemented, and the signaling overhead of the user equipment is also reduced.

Based on the first aspect, in a first possible implementation manner of the first aspect, the acquiring, by the radio access device, the precoding matrix indication of each second beam resource of the at least two second beam resources includes:

The wireless access device determines, by using an open-loop precoding technique, a precoding matrix indication on each of the second beam resources of the at least two second beam resources.

Applying the technical solution in the first possible implementation manner of the first aspect, the precoding matrix of each second beam resource is determined by the radio access device, further reducing feedback of the user equipment on each second beam resource. The precoding matrix indicates the required signaling overhead.

Based on the first aspect, in a second possible implementation manner of the first aspect, the first information is further sent by the user equipment to perform precoding on each second beam resource of the at least two second beam resources. Matrix indication

And obtaining, by the wireless access device, a precoding matrix indication of each second beam resource of the at least two second beam resources, including:

The wireless access device receives third information sent by the user equipment, where the third information indicates a precoding matrix indication on each second beam resource of the at least two second beam resources.

In a second possible implementation manner of the first aspect, the precoding matrix on each second beam resource is fed back by the user equipment, thereby improving short-term or narrow-band channel information of each second beam resource on the downlink. The accuracy allows the wireless access device to more accurately determine the precoding matrix when transmitting the data stream on the downlink.

The third possible implementation manner of the first aspect, which is the second possible implementation manner of the first aspect, further includes:

Receiving, by the wireless access device, fourth information that is sent by the user equipment, where the fourth information indicates a rank indication of each of the at least two second beam resources;

The rank indication of each of the at least two second beam resources is used by the radio access device to determine a precoding matrix indication of each second beam resource from the precoding codebook, respectively; And a sum of ranks of each of the at least two second beam resources is used by the radio access device to determine a precoding matrix indication of the first beam resource from the precoding codebook.

Applying the third possible implementation manner of the first aspect, the radio access device may determine, according to the received rank indication, that the pre-coded matrix indication fed back by the user equipment corresponds to which rank indication precoding in the precoding codebook matrix.

A second aspect of the embodiments of the present invention provides a wireless access device, where the wireless access device includes a transmitter, a receiver, and a processor. The transmitter is configured to perform a sending action of the wireless access device in the method embodiment provided by the first aspect of the embodiments of the present invention. The receiver is configured to perform the receiving action of the wireless access device in the first aspect and various possible implementation manners of the embodiments of the present invention. The processor is configured to perform the acquisition, determination, and other processing actions of the wireless access device in the first aspect and various possible implementation manners of the embodiments of the present invention. The wireless access device provided by the second aspect of the embodiment of the present invention can achieve the technical effects as the first aspect and various possible implementation manners. For details, refer to the foregoing description.

A third aspect of the embodiments of the present invention provides a user equipment, including the following content.

The user equipment receives the wireless access device to send the first information, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beam resources, where The precoding matrix of the first beam resource indicates a corresponding long-term or wide-band channel feature, and the precoding matrix of each second beam resource of the at least two second beam resources indicates a corresponding short-term or narrow-band channel feature;

The user equipment performs channel estimation on the first beam resource, and determines a precoding matrix indication of the first beam resource;

Transmitting, by the user equipment, second information to the wireless access device, where the second information indicates a precoding matrix indication of the first beam resource;

Receiving, by the user equipment, a precoded data stream precoded by the wireless access device, where the precoding matrix precoding the data stream is performed by the wireless access device according to the first A precoding matrix indication of a beam resource and a precoding matrix indication of each of the at least two second beam resources are determined.

Applying the technical solution provided by the third aspect of the embodiments of the present invention, in the process of using the precoding technology to transmit a data stream, the user equipment responds to the long-term or wide-band channel estimation according to the indication of the wireless access device, and the feedback is at least two. The beam resources are combined to form a precoding matrix indication of the long-term or wide-band channel estimation of a resource group (first beam resource) without separately feeding back the long-term or wideband channel estimation of each beam resource (second beam resource). A precoding matrix indication of long term or wideband channel estimates is obtained. Therefore, in the case that the number of the beam resources of the user equipment increases, the signaling of the user equipment does not increase exponentially, and the precoding process of the data stream is also implemented, and the signaling overhead of the user equipment is also reduced. .

Based on the third aspect, in a first possible implementation manner of the third aspect, the first information is further configured by the user equipment to feed back a precoding matrix of each second beam resource of the at least two second beam resources. An indication; the method further includes:

The user equipment performs channel estimation on each second beam resource of the at least two second beam resources, and determines a precoding matrix indication of each second beam resource of the at least two second beam resources;

The user equipment sends third information to the wireless access device, where the third information indicates a precoding matrix indication of each second beam resource of the at least two second beam resources.

In a first possible implementation manner of the third aspect, the precoding matrix on each second beam resource is fed back by the user equipment, thereby improving short-term or narrow-band channel information of each second beam resource on the downlink. The accuracy allows the wireless access device to more accurately determine the precoding matrix when transmitting the data stream on the downlink.

Based on the third aspect or the first possible implementation manner of the third aspect, the method further includes:

The user equipment sends fourth information to the wireless access device, where the fourth information indicates a rank indication of each second beam resource of the at least two second beam resources;

The rank indication of each of the at least two second beam resources is used to determine a precoding matrix indication that the radio access device determines each second beam resource from the precoding codebook, respectively; And a sum of ranks of each of the at least two second beam resources is used by the radio access device to determine a precoding matrix indication of the first beam resource from the precoding codebook.

Applying the third possible implementation manner of the first aspect, the radio access device may determine, according to the received rank indication, that the precoding matrix indication that is fed back by the user equipment corresponds to which rank indication precoding in the precoding codebook matrix.

A fourth aspect of the embodiments of the present invention provides a user equipment, where the user equipment includes a transmitter, a receiver, and a processor. The transmitter is configured to perform a sending action of the user equipment in the third aspect and various possible implementation manners of the embodiments of the present invention. The receiver is configured to perform the receiving action of the user equipment in the third aspect and various possible implementation manners of the embodiments of the present invention. The processor is configured to perform the acquisition, determination, and other processing actions of the user equipment in the third aspect and various possible implementation manners of the embodiments of the present invention. The user equipment provided in the fourth aspect of the embodiments of the present invention can achieve the technical effects in the third aspect and various possible implementation manners. For details, refer to the foregoing description.

A fifth aspect of embodiments of the present invention provides a communication processing apparatus including a memory and a processor, the memory storing code, implementing the first aspect, the third aspect, and each possible implementation when the code is invoked by the processor A method provided by any of the modes. The communication processing device may be the wireless access device itself of the first aspect or the user equipment itself of the third aspect, or may be a chip system in the wireless access device or a chip system in the user equipment.

A sixth aspect of the embodiments of the present invention provides a computer storage medium, including a memory, the memory storing code, wherein the code is used to implement the method provided by any one of the first aspect, the third aspect, and various possible implementation manners thereof .

DRAWINGS

1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention;

2 is a schematic diagram of a feedback precoding matrix indication according to an embodiment of the present invention;

FIG. 3 is a flowchart of a data processing method according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a feedback precoding matrix indication according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a wireless access device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

detailed description

In the schematic diagram of the wireless communication system shown in FIG. 1, a wireless access device, such as a base station, a wireless local area network access point, and the like, a transmission reception point (TRP), provides an access service for the user equipment under the licensed spectrum. Or access services under unlicensed spectrum. The user equipment and the wireless access device transmit various data, such as control signaling or service data, in accordance with a protocol layer on the uplink and the downlink. The control signaling is mainly transmitted on the control channel, and the service data is mainly transmitted on the traffic channel. These protocol layers include a physical layer, a medium access control layer, and a radio resource control layer. Regardless of the data transmitted at which layer, the final bearer is transmitted over the physical layer in the wireless space by at least one physical antenna.

In order to realize data transmission on the physical layer, the time domain is divided into a plurality of time units, and the frequency domain is divided into a plurality of frequency units. For example, in a long term evolution (LTE) system, one time unit may be one radio frame, and one radio frame has a length of 10 milliseconds (ms), and is composed of 10 1 ms subframes, and one subframe consists of several Orthogonal Frequency Division Multiplexing (OFDM) symbols are formed; one frequency unit can be one subcarrier, and the usual one subcarrier is 15 kHz (kilohertz), and the number combinations of different subcarriers can be different. Total system bandwidth. With the deepening research of LTE system and enhanced mobile broadband (eMBB) in the fifth generation mobile communication system, massive machine type communication (mMTC), high reliability and low latency communication (ultra reliable and Low latency communication (URLLC) service requirements, in the time domain and frequency domain, the length of time unit occupied by a time unit and the length occupied by a frequency unit in frequency may vary with different wireless communication requirements. . The wireless communication system can be configured by different wireless parameters, for example, in a fifth generation mobile communication system, which can be called a numerology parameter, to realize the definition of the time unit used for data transmission and the frequency unit used for data transmission. Defined to meet the changing needs of different wireless communications.

In order to reduce interference between different data streams of the same user equipment or data flows of different user equipments, the wireless access device pre-codes the transmitted data stream so that the pre-coded data stream is as far as possible in the wireless space. Optimal transmission. For example, in the 4 antenna codebook of 3GPP Release 12, the 8 antenna codebook of 3GPP Release 10, the 3GPP Release 13 and the 3GPP Release 13 after the LTE system, the full dimension-multi input multi output (Full dimension-multi input multi output) The FD-MIMO codebook is a two-stage codebook structure, and the wireless access device and the user equipment pre-store or generate the same codebook according to the definition in the protocol. After the user equipment performs channel estimation on the downlink beam resources, the user equipment sends channel state information to the wireless access device, where the channel state information includes precoding of each level of the two levels of codebooks. Matrix indication (set to PMI1 and PMI2). PMI1 is obtained by performing long-term or wide-band channel estimation on this beam resource, and a matrix containing at least two precoding matrices is indicated in PMI1. PMI2 is obtained by performing short-term or narrow-band (also called sub-band) channel estimation on this same beam resource. PMI2 has frequency selectivity, and PMI2 can be used to select at least one precoding matrix from the matrix indicated by PMI1; PMI2 also The selected at least one precoding matrix can be phase rotated or signal amplitude adjusted by introducing a phase rotation vector or signal amplitude adjustment. It should be noted that the precoding matrix is indicated as a vector group containing a plurality of codebook indexes. In the codebooks of different logical antenna ports, the number of codebook indexes in the precoding matrix indication may be different. For example, for a codebook of two logical antenna ports, one precoding matrix is indicated as a vector group containing only one codebook index; for a codebook of four logical antenna ports, one precoding matrix indication may be two codebooks. The vector group of the index; and so on.

As shown in FIG. 2, after receiving the two precoding matrix indications PMI1 and PMI2, the radio access device further determines the precoding matrix finally used when transmitting the data stream with reference to PMI1 and PMI2. However, in the process of implementing the precoding of the data stream, for each beam resource configured for the user equipment, if the user equipment feeds back PMI1 and PMI2, especially if the number of beam resources is multiplied, The user equipment feedback signaling overhead will also increase exponentially.

In view of the above technical problem, an embodiment of the present invention provides a data processing method, which is a schematic diagram of a data processing flow shown in FIG. 3, and includes the following contents.

300. The wireless access device sends configuration information of a beam resource used by the reference signal to the user equipment, where multiple beam resources are indicated in the configuration information of the beam resource.

It should be noted that a wireless access device may include multiple logical antenna arrays, and each logical antenna array may be used to transmit a data stream. For example, in a fifth generation mobile communication system, one wireless access device will include a logical antenna. A set of logical antenna arrays is called a panel, and a panel is configured with beam resources for transmitting reference signals. Different beam resources can be regarded as different spatial paths from each logical antenna array to the user equipment. Therefore, the precoding matrix may also be different. In addition, since the channel characteristics of each logical antenna array to the spatial path of the user equipment (which may be represented by a channel matrix) may vary with time and frequency, the channel estimation of the beam resources may include (time) long-term or ( Frequency) Wideband channel estimation and (time) short-term or (frequency) narrowband channel estimation. Long-term or wideband channel estimation and short-term or narrow-band channel estimation can be referred to the definitions in the 3GPP protocol.

In addition, it can be understood that for each logical antenna array, the number of stages of the multi-level codebook may be different, and the precoding matrix in the codebook is also different. For example, a wireless access device includes a logical antenna array A and a logical antenna array B, the logical antenna array A corresponds to a level 1 codebook, and the logical antenna array B corresponds to a level 2 codebook, then the wireless access device and The user equipment served by the wireless access device uses a codebook of at least level 3.

In 300, the beam resource used by the reference signal transmission includes at least one of the following: a logical antenna port number where the reference signal is located, a logical antenna array where the reference signal is located, and a time frequency of the reference signal A resource location, a precoding manner of the reference signal (eg, a precoding manner of the reference signal indicates whether transmission of the reference signal is precoded by a plurality of precoding matrices), and the like. The radio access device may perform channel estimation on different beam resources by using beam resources of different reference signals, and then feed back precoding matrix indications on different beam resources.

It should be noted that the reference signal, also called the training sequence, the pilot signal, is sent by the signal sending end (here, the wireless access device) to the receiving end (here, the user equipment) for channel estimation. A signal known to the transmitting end and the receiving end. The transmitting end sends a known reference signal to the receiving end, so that the receiving end determines the channel matrix according to the change generated by the known reference signal in the downlink transmission. The channel matrix is further mathematically processed, such as singular value decomposition, to obtain a precoding matrix.

In the LTE system, the reference signal sent by the radio access device to the user equipment includes a channel state information reference signal (CSI-RS), and a cell-specific reference signal (CRS). ), a UE-specific reference signal, and the like.

In the fifth generation mobile communication system, the reference signal sent by the wireless access device to the user equipment for channel estimation may be a CSI-RS. The wireless access device may configure multiple beam resources of the CSI-RS to determine precoding matrix indications on the multiple beam resources.

301. The wireless access device sends first information to the user equipment, where the first information indicates that the user equipment feeds back a precoding matrix indication of a first beam resource.

The first beam resource is composed of at least two of the plurality of beam resources configured by the radio access device, and each of the at least two beam resources is referred to as a second beam resource. The precoding matrix of the first beam resource indicates a corresponding long-term or wide-band channel feature, and the precoding matrix of each second beam resource of the at least two second beam resources indicates a corresponding short-term or narrow-band channel feature. A special case is that the radio access device configures all beam resources of the multiple beam resources to form a first beam resource. In this case, the precoding matrix of the first beam resource indicates a long-term or wide-band channel feature of the first beam resource; and the pre-coding matrix of the second beam resource indicates a short-term or short-term of the second beam resource. Narrowband channel characteristics. Those skilled in the art can understand that the channel feature refers to a channel that amplifies, reduces, and generates inherent characteristics such as Doppler shift on a signal transmitted on the path of the channel.

In 301, specifically, the wireless access device is configured with at least two antenna panels, and each antenna panel is spaced far apart, for example, at least 8 times the wavelength of the wireless electromagnetic wave transmitted by the wireless access device. At this time, each antenna panel has independent independence or low correlation defined in probability statistics. In this case, the wireless access device sends the first information to the user equipment, and performs feedback of the precoding matrix indication of the first beam resource. The first information may further indicate that the user equipment feeds back a feedback format used by the precoding matrix indication of the first beam resource and a used time frequency resource.

302. The wireless access device sends the reference signal to the user equipment.

303. The user equipment receives the reference signal from a downlink, and performs channel estimation on the first beam resource, so as to determine a precoding matrix indication of the first beam resource, the first beam resource. The precoding matrix indicates the corresponding long term or wideband channel characteristics.

In 303, the user equipment performs long-term or wideband channel estimation on the first beam resource, for example, performing channel estimation by using singular value decomposition, and determining a precoding matrix indication of the first beam resource.

304. The second information sent by the user equipment to the wireless access device, where the second information indicates a precoding matrix indication of the first beam resource.

In 304, for feedback of the long-term or wide-band channel estimation, the user equipment feeds back to the wireless access device a pre-coding of a long-term or wideband channel estimation of a first beam resource including at least two second beam resources. The matrix indicates, rather than the precoding matrix indication of the long term or wideband channel estimate of the at least two second beam resources.

The precoding matrix indication for short-term or narrow-band channel estimation, as an optional implementation, may be determined by the wireless access device, as indicated by 305, thereby further reducing the prediction of the short- or narrow-band channel estimation by the user equipment. The coding matrix indicates the required signaling overhead.

305. The wireless access device determines a precoding matrix of short-term or narrow-band channel estimation on each second beam resource of the at least two second beam resources, for example, using an open-loop precoding technique. Optionally, in the open-loop precoding technology, the base station can determine multiple precoding matrices according to the precoding indication reported by the first beam resource. The base station applies, according to the principle of optimizing the system capacity, at least two of the plurality of precoding matrices to the precoding of the plurality of second beam resources, respectively.

For the short-term or narrow-band channel estimation, the pre-coding matrix indication, as another alternative implementation, may be instructed by the wireless access device to perform the determining, for example, the first information received by the user equipment is further Instructing the user equipment to feed back a precoding matrix indication on each second beam resource of the at least two second beam resources, and feed back to the wireless access device by the user equipment, as shown in FIG. 305 ′, thereby The knowledge of the channel state of the downlink channel by the wireless access device is improved.

305 ′, the user equipment performs short-term or narrow-band channel estimation on the at least two second beam resources, determines a precoding matrix indication of the at least two second beam resources, and sends the precoding matrix indication to the wireless access device. And a third information, where the third information indicates a precoding matrix indication on each second beam resource of the at least two second beam resources.

In 305 ′, the third information may further indicate that a precoding matrix of each second beam resource indicates a corresponding signal amplitude adjustment or signal phase adjustment (eg, also referred to as a co-phasing factor in an LTE system), thereby And causing the wireless access device to perform signal amplitude adjustment and signal phase adjustment on the data stream when precoding the data stream.

The 305 or 305 ′, the radio access device may obtain a precoding matrix indication of each of the second beam resources of the at least two second beam resources, and the precoding matrix indicates at least the corresponding signal amplitude adjustment and signal phase adjustment. An adjustment.

306. The radio access device refers to a precoding matrix indication of the first beam resource and a precoding matrix indication of the at least two second beam resources, (optionally, according to the foregoing signal amplitude adjustment and signal phase At least one adjustment of the adjustment), determining a precoding matrix used in transmitting the data stream, and precoding the data stream using the precoding matrix.

In 306, the radio access device may refer to the precoding matrix indication of the first beam resource and the precoding matrix of the at least two second beam resources to indicate that the transmit data stream is selected from the precoding codebook. Precoding matrix. Optionally, the user equipment may further feed back, to the radio access device, a rank indicator of each second beam resource channel estimation, so that the radio access device determines the foregoing from the precoding codebook. a precoding matrix indication of the second beam resource under the rank indication, and a precoding matrix indication of the first beam resource after determining the rank indication after each of the second beam resource channel estimates.

In a specific possible implementation manner, it is assumed that the precoding matrix of the first beam resource indicates that the indicated matrix is W1, and the precoding matrix of the plurality of second beam resources indicates that the indicated matrix is W21, W22, W2i, . .. Without loss of generality, the precoding matrix Wi of the data stream transmitted on the i-th second beam resource can be expressed as a function of W1 and W2i, ie Wi=function(W1, W2i), as a special case, Wi=W1* W2i.

In the foregoing implementation, optionally, the pre-matrix matrix of the first beam resource indicates that the indicated matrix W1 includes multiple candidate precoding matrices, and the precoding matrix of the Wi second second beam resources indicates the indicated The matrix W2i is configured to select at least one precoding matrix from the plurality of candidate precoding matrices. Optionally, the precoding matrix of the first beam resource indicates that the indicated matrix W1 may also be a precoding matrix composed of multiple vectors, and the precoding matrix of the Wi second second beam resources indicates the indicated matrix W2i Used to determine the amplitude or phase coefficient of each of the multiple vectors. Optionally, the precoding matrix of the first beam resource indicates that the indicated matrix W1 includes multiple vector groups, and the precoding matrix of the Wi second second beam resources indicates that the indicated matrix W2i is used to At least one vector group is selected in the group and an amplitude coefficient or phase coefficient of each selected vector group is determined.

307. The wireless access device sends a precoded data stream to the user equipment.

308. The user equipment receives a precoded data stream sent by the wireless access device.

Due to the effect of the precoding technique, the data stream transmitted in the wireless space is more concentratedly aligned with the user equipment receiving the data stream, thereby facilitating the user equipment to parse the data stream more accurately.

According to the technical solution provided by the embodiment of the present invention, in the process of using the precoding technology to transmit a data stream, the user equipment responds to the long-term or wide-band channel estimation according to the indication of the wireless access device, and feedbacks at least two beam resources. Long-term or wideband channel estimates derived from long-term or wideband channel estimation of a resource group (first beam resource) combined without long-term or wideband channel estimation for each beam resource (second beam resource) Precoding matrix indication of wideband channel estimation. Therefore, in the case that the number of the beam resources of the user equipment increases, the signaling of the user equipment does not increase exponentially, and the precoding process of the data stream is also implemented, and the signaling overhead of the user equipment is also reduced. .

An embodiment of the present invention provides a data processing method, as shown in FIG. 4 . This embodiment is a further refinement and exemplification of the embodiment shown in FIG. 3. Repeating or similar content may not be repeated, and specifically refer to the description of the foregoing embodiment.

In this embodiment, the wireless access device configures multiple beam resources of the reference signal, and at least two of the multiple beam resources are grouped into one group. Without a loss of generality, it is assumed that the wireless access device has five panels A, B, C, D, and E, and one beam resource for each panel configuration reference signal transmission is taken as an example, that is, beam resource A on panel A, Beam resource B on panel B, beam resource C on panel C, beam resource D on panel D, and beam resource E on panel E. Panel A and panel B form the first group, and panels C, D and E form the second group.

The data flow sent by the wireless access device to the user equipment is divided into a first partial data stream and a second partial data stream, which are respectively sent through the panel A and the panel B, wherein the second partial data stream may be a repetition of the first partial data stream. It may also be a portion of the data stream that is outside of the first portion of the data stream.

As described in the foregoing embodiment, in order to reduce the overhead of feedback, the user equipment includes two types of information on channel state information on at least two panels, and the first information is a beam resource of all panels as a resource group for long-term or broadband. The precoding matrix indication obtained by channel estimation, and the second information is a precoding matrix indication obtained by performing short-term or narrow-band channel estimation for each panel separately. Briefly, the precoding matrix in the first information indicates the corresponding long-term or wide-band channel characteristics, and the precoding matrix in the second information indicates the corresponding short-term or narrow-band channel characteristics.

Applying the method, for the first group, the beam resource A of the panel A and the beam resource B of the panel B constitute a resource group (ie, the first beam resource), and the channel state information fed back by the user equipment is used. A precoding matrix containing long-term or wideband channel estimates on this resource group indicates Longterm-PMI _SET1 , a precoding matrix for short-term or narrow-band channel estimation of beam resource A indicates shortterm-PMIA, and a pre- and short-band channel estimation for beam resource B The coding matrix indicates shortterm-PMIB.

Similarly, for the second group, the channel state information fed back by the user equipment includes the precoding matrix of the long-term or wideband channel estimation on the resource group formed by the panel C, D, E, indicating the Longterm-PMI _SET2 , the beam resource. The precoding matrix of the C short-term or narrow-band channel estimation indicates the shortterm-PMIC, the precoding matrix of the short-term or narrow-band channel estimation of the beam resource D indicates the shortterm-PMID, and the precoding matrix of the short-term or narrow-band channel estimation of the beam resource E indicates the shortterm -PMIE.

Further optionally, for each beam resource A-E, the user equipment may also feed back a signal amplitude adjustment or a phase adjustment corresponding to the precoding matrix indication of each short-term or narrow-band channel estimation.

As a special case, all beam resources configured on all panels that send data streams to the user equipment can be used as one resource group. Similarly, the user equipment may feed back to the wireless access device a precoding matrix indication of the long-term or wideband channel estimation of the resource group; optionally, further feedback short-term or narrow-band channel estimation for each beam resource of all beam resources. Precoding matrix indication. In this case, the signaling overhead of the user equipment is minimal.

According to the technical solution provided by the embodiment of the present invention, the user equipment responds to the long-term or wide-band channel estimation according to the indication of the wireless access device, and the feedback is that at least two beam resources are combined into one resource group (first beam resource). Long-term or wideband channel estimation of the precoding matrix indication, without further feedback of the long-term or wideband channel estimation of each beam resource (second beam resource) to obtain a precoding matrix indication of the long-term or wideband channel estimation. Therefore, in the case that the number of the beam resources of the user equipment increases, the signaling of the user equipment does not increase exponentially, and the precoding process of the data stream is also implemented, and the signaling overhead of the user equipment is also reduced. .

An embodiment of the present invention provides a wireless access device 500, which is a schematic structural diagram of a wireless access device 500, as shown in FIG. 5, including a transmitter 501, a receiver 502, and a processor 503, which are connected through various electronic circuit interfaces (for example, The bus is connected together.

The transmitter 501 is configured to send first information to the user equipment, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beam resources; The precoding matrix of the first beam resource indicates a corresponding long-term or wideband channel estimation, and the precoding matrix of each second beam resource of the at least two second beam resources corresponds to a short-term or narrow-band channel estimation.

The receiver 502 is configured to receive second information sent by the user equipment, where the second information indicates a precoding matrix indication of the first beam resource.

The processor 503 is configured to acquire a precoding matrix indication of each second beam resource of the at least two second beam resources, and according to the precoding matrix indication of the first beam resource and the at least two second beams A precoding matrix for each second beam resource of the resource indicates a precoding matrix that determines the data stream, and a precoding data stream is determined from the precoding matrix of the data stream.

The transmitter 501 is further configured to send the precoded data stream to the user equipment.

Optionally, the processor 503 is configured to obtain a precoding matrix indication of each second beam resource of the at least two second beam resources, where the processor 503 is configured to determine by using an open loop precoding technique. Precoding matrix indications on each of the at least two second beam resources on each of the second beam resources.

Optionally, the first information is further used by the user equipment to feed back a precoding matrix indication on each second beam resource of the at least two second beam resources, where the processor 503 is configured to acquire Precoding matrix indication of each second beam resource of the at least two second beam resources, including: the processor 503, configured to receive third information by using the receiver from the user equipment, the third The information indicates a precoding matrix indication on each of the at least two second beam resources on each of the second beam resources.

Optionally, the receiver 502 is further configured to receive fourth information sent by the user equipment, where the fourth information indicates a rank indication of each second beam resource of the at least two second beam resources; a rank indication of each of the at least two second beam resources, a precoding matrix indication for determining, by the radio access device, each second beam resource from the precoding codebook, respectively; And a sum of ranks of each of the at least two second beam resources for determining, by the wireless access device, a precoding matrix indication of the first beam resource from the precoding codebook.

It should be noted that the wireless access device provided by the embodiment of the present invention may perform the actions of the wireless access device in the foregoing method embodiment, for example, the embodiment shown in FIG. The transmitter 501 is configured to perform the radio access device sending action in the foregoing method embodiment, the receiver 502 is configured to perform the receiving action of the radio access device in the foregoing method embodiment, and the processor 503 is configured to perform the acquiring of the foregoing method embodiment. Determine the processing action. For details, refer to the foregoing method embodiments, which are not described in this embodiment.

The embodiment of the present invention provides a user equipment 600, which is a schematic structural diagram of the user equipment 600 shown in FIG. 6, and includes a transmitter 601, a receiver 602, and a processor 603, which are connected through various electronic circuit interfaces (such as a bus). together.

The receiver 602 is configured to receive, by the wireless access device, the first information, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beams. a resource, wherein a precoding matrix of the first beam resource indicates a corresponding long term or wideband channel estimate, and a precoding matrix of each of the at least two second beam resources indicates a corresponding short term or narrowband channel estimate.

The processor 603 is configured to perform channel estimation on the first beam resource, and determine a precoding matrix indication of the first beam resource.

The transmitter 601 is configured to send second information to the wireless access device, where the second information indicates a precoding matrix indication of the first beam resource.

The receiver 602 is further configured to receive, by the wireless access device, a precoded data stream that is precoded by the data access, where the precoding matrix that precodes the data stream is used by the wireless access device And determining, according to a precoding matrix indication of the first beam resource and a precoding matrix indication of each of the at least two second beam resources.

Optionally, the first information further indicates that the user equipment feeds back a precoding matrix indication of each second beam resource of the at least two second beam resources; the processor 603 is further configured to: Performing channel estimation for each of the two second beam resources, and determining a precoding matrix indication for each second beam resource of the at least two second beam resources; the transmitter 601 is further used for The wireless access device sends third information, where the third information indicates a precoding matrix indication of each of the at least two second beam resources.

Optionally, the transmitter 601 is further configured to send fourth information to the wireless access device, where the fourth information indicates a rank indication of each second beam resource of the at least two second beam resources. Wherein the rank indication of each of the at least two second beam resources is used by the radio access device to determine a precoding matrix indication of each second beam resource from the precoding codebook, respectively; And a sum of ranks of each of the at least two second beam resources is used by the radio access device to determine a precoding matrix indication of the first beam resource from the precoding codebook.

It should be noted that the user equipment 600 provided by the embodiment of the present invention may perform the actions of the user equipment in the foregoing method embodiment, for example, the embodiment shown in FIG. The transmitter 601 is configured to perform the radio access device sending action in the foregoing method embodiment, the receiver 602 is configured to perform the receiving action of the radio access device in the foregoing method embodiment, and the processor 603 is configured to perform the obtaining of the foregoing method embodiment. Determine the processing action. For details, refer to the foregoing method embodiments, which are not described in this embodiment.

In order to enable communication between the user equipment 600 and the wireless access device 500, the user equipment 600 and the wireless access device 500 may each include at least one logical antenna array and be mapped to at least one physical antenna. The number of physical antennas of the user equipment 600 and the number of physical antennas of the wireless access equipment 500 may be the same or different. The specific antenna configuration can be referred to the prior art.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of a method, apparatus (system), and computer program product according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A data processing method, comprising:

The wireless access device sends the first information to the user equipment, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beam resources; The precoding matrix of the first beam resource indicates a corresponding long-term or wide-band channel feature, and the precoding matrix of each second beam resource of the at least two second beam resources indicates a corresponding short-term or narrow-band channel feature;

Receiving, by the wireless access device, second information sent by the user equipment, where the second information indicates a precoding matrix indication of the first beam resource;

Obtaining, by the wireless access device, a precoding matrix indication of each second beam resource of the at least two second beam resources;

Determining, by the radio access device, a precoding matrix of the data stream according to a precoding matrix indication of the first beam resource and a precoding matrix indication of each second beam resource of the at least two second beam resources;

Determining, by the wireless access device, a precoded data stream according to a precoding matrix of the data stream;

The wireless access device sends the precoded data stream to the user equipment.
The method according to claim 1, wherein the wireless access device acquires a precoding matrix indication of each second beam resource of the at least two second beam resources, including:

The wireless access device determines, by using an open-loop precoding technique, a precoding matrix indication on each of the second beam resources of the at least two second beam resources.
The method according to claim 1, wherein the first information further indicates that the user equipment feeds back a precoding matrix indication on each second beam resource of the at least two second beam resources;

And obtaining, by the wireless access device, a precoding matrix indication of each second beam resource of the at least two second beam resources, including:

The wireless access device receives third information sent by the user equipment, where the third information indicates a precoding matrix indication on each second beam resource of the at least two second beam resources.
The method of any of claims 1-3, further comprising:

The wireless access device receives fourth information sent by the user equipment, and the fourth information indicates a rank indication of each of the at least two second beam resources.
A data processing method, comprising:

The user equipment receives the wireless access device to send the first information, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beam resources, where The precoding matrix of the first beam resource indicates a corresponding long-term or wide-band channel feature, and the precoding matrix of each second beam resource of the at least two second beam resources indicates a corresponding short-term or narrow-band channel feature;

The user equipment performs channel estimation on the first beam resource, and determines a precoding matrix indication of the first beam resource;

Transmitting, by the user equipment, second information to the wireless access device, where the second information indicates a precoding matrix indication of the first beam resource;

Receiving, by the user equipment, a precoded data stream precoded by the wireless access device, where the precoding matrix precoding the data stream is performed by the wireless access device according to the first A precoding matrix indication of a beam resource and a precoding matrix indication of each of the at least two second beam resources are determined.
The method according to claim 5, wherein the first information further indicates that the user equipment feeds back a precoding matrix indication of each second beam resource of the at least two second beam resources;

The method further includes:

The user equipment performs channel estimation on each second beam resource of the at least two second beam resources, and determines a precoding matrix indication of each second beam resource of the at least two second beam resources;

The user equipment sends third information to the wireless access device, where the third information indicates a precoding matrix indication of each second beam resource of the at least two second beam resources.
The method according to claim 5 or 6, wherein the method further comprises:

The user equipment sends fourth information to the wireless access device, where the fourth information indicates a rank indication of each of the at least two second beam resources.
A wireless access device, comprising:

a transmitter, configured to send first information to the user equipment, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beam resources; The precoding matrix of the first beam resource indicates a corresponding long-term or wide-band channel feature, and the precoding matrix of each of the at least two second beam resources corresponds to a short-term or narrow-band channel feature;

a receiver, configured to receive second information sent by the user equipment, where the second information indicates a precoding matrix indication of the first beam resource;

a processor, configured to acquire a precoding matrix indication of each second beam resource of the at least two second beam resources, and according to the precoding matrix indication of the first beam resource and the at least two second beam resources A precoding matrix of each second beam resource indicates a precoding matrix that determines a data stream, and a precoding data stream is determined according to a precoding matrix of the data stream;

The transmitter is further configured to send the precoded data stream to the user equipment.
The radio access device according to claim 8, wherein the processor is configured to acquire a precoding matrix indication of each second beam resource of the at least two second beam resources, including:

The processor is configured to determine a precoding matrix indication on each of the second beam resources of the at least two second beam resources using an open loop precoding technique.
The radio access device according to claim 8, wherein the first information further indicates that the user equipment feeds back a precoding matrix indication on each second beam resource of the at least two second beam resources. ;

The processor is configured to obtain a precoding matrix indication of each second beam resource of the at least two second beam resources, including:

The processor is configured to obtain third information by using the receiver to receive from the user equipment, where the third information indicates a precoding matrix indication on each second beam resource of the at least two second beam resources. .
A wireless access device according to any one of claims 1-3, characterized in that

The receiver is further configured to receive fourth information sent by the user equipment, where the fourth information indicates a rank indication of each of the at least two second beam resources.
A user equipment, comprising:

a receiver, configured to receive, by the wireless access device, the first information, where the first information indicates that the user equipment feeds back a precoding matrix indication of the first beam resource, where the first beam resource includes at least two second beam resources The precoding matrix of the first beam resource indicates a corresponding long-term or wide-band channel feature, and the precoding matrix of each second beam resource of the at least two second beam resources indicates a corresponding short-term or narrow-band channel feature;

a processor, configured to perform channel estimation on the first beam resource, and determine a precoding matrix indication of the first beam resource;

a transmitter, configured to send, to the wireless access device, second information, where the second information indicates a precoding matrix indication of the first beam resource;

The receiver is further configured to receive, by the wireless access device, a precoded data stream that is precoded by the data stream, where the precoding matrix that precodes the data stream is used by the wireless access device according to the The precoding matrix indication of the first beam resource and the precoding matrix indication of each of the at least two second beam resources are determined.
The radio access device according to claim 12, wherein the first information further indicates that the user equipment feeds back a precoding matrix indication of each second beam resource of the at least two second beam resources;

The processor is further configured to perform channel estimation on each second beam resource of the at least two second beam resources, and determine a precoding matrix indication of each second beam resource of the at least two second beam resources;

The transmitter is further configured to send third information to the wireless access device, where the third information indicates a precoding matrix indication of each second beam resource of the at least two second beam resources.
Method according to claim 11 or 12, characterized in that

The transmitter is further configured to send fourth information to the wireless access device, where the fourth information indicates a rank indication of each of the at least two second beam resources.