WO2019024611A1

WO2019024611A1 - Pmi-based processing method and apparatus, related device and storage medium

Info

Publication number: WO2019024611A1
Application number: PCT/CN2018/091027
Authority: WO
Inventors: 倪吉庆; 周伟; 孙奇
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2017-08-01
Filing date: 2018-06-13
Publication date: 2019-02-07
Also published as: CN109327251A

Abstract

Disclosed is a pre-coding matrix index (PMI) based processing method, comprising: performing channel measurement on a sub-band, and feeding back channel state information (CSI) to a base station, wherein during feedback of the CSI, when the bandwidth of the sub-band corresponds to the bandwidths of some or all control channels, the feedback PMI and first information indicate a pre-coding matrix of the sub-band data channel and a pre-coding vector of the sub-band control channel; and the data channel transmits data in a multi-stream pre-coding mode. Also disclosed are a PMI-based processing apparatus, a terminal, a base station, and a computer readable storage medium

Description

PMI-based processing method, device, related device and storage medium

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201710647781.7, filed on Jan. 1, 2011, the entire entire entire entire entire entire entire content

Technical field

The present disclosure relates to the field of wireless communications, and in particular, to a processing method, apparatus, terminal, base station, and computer readable storage medium based on a Precoding Matrix Index (PMI).

Background technique

In the Long Term Evolution (LTE) system, the physical layer control channel adopts a fixed transmission diversity scheme, and the data channel can adopt multiple transmission modes, including: transmission mode 1 to transmission mode 10. Among them, there are multiple closed-loop transmission modes in transmission mode 1 to transmission mode 10, such as transmission mode 4: closed-loop spatial multiplexing, transmission mode 5: MU-MIMO, transmission mode 6 single-layer closed-loop MIMO, and the like. In these closed-loop transmission modes, terminal feedback channel state information (CSI) is required, and then the base station performs corresponding transmission mode configuration based on the feedback CSI.

In order to enhance the coverage of the downlink control channel, it is considered that the single-layer beamforming transmission mode of the new air interface of the fifth generation mobile communication technology (5G) can effectively improve the coverage performance. In order to support a closed-loop single-layer precoding scheme, the control channel also requires PMI information.

In order to support the closed-loop single-layer precoding scheme of the control channel, one scheme is to directly adopt the PMI of the data channel of a certain sub-band as the PMI of the control channel of the corresponding sub-band. However, in this scheme, if the terminal feeds back an indication of a multi-layer codeword, the PMI of the data channel cannot be directly used as the PMI of the control channel for one sub-band.

Therefore, how to implement PMI feedback of the control channel in the case where the control channel supports the closed-loop single-layer precoding scheme is a problem mainly solved by the present disclosure.

Summary of the invention

In order to solve the technical problems in the related art, embodiments of the present disclosure provide a PMI-based processing method, apparatus, terminal, base station, and computer readable storage medium.

The technical solution of the embodiment of the present disclosure is implemented as follows:

The embodiment of the present disclosure provides a PMI-based processing method, including:

Performing channel measurement on the subband and feeding back CSI to the base station; wherein

When the CSI is fed back, when the bandwidth of the subband corresponds to part or all of the control channel bandwidth, the fed back PMI and the first information indicate a precoding matrix of the subband data channel and a precoding vector of the subband control channel. The data channel transmits data using a multi-stream precoding method.

In the above solution, the manner of feeding back the PMI and the first information includes one of the following:

Transmitting a PMI of the subband data channel, feeding back a first information that is empty; a PMI of the subband data channel indicating a precoding matrix of a subband data channel; and a vector or random location of a fixed position in the precoding matrix The vector is used by the base station to determine a precoding vector of the subband control channel;

And feeding back a PMI of the subband data channel, and feeding back the first information is not empty, where the first information is used by the base station to determine a precoding vector of the subband control channel.

In the above solution, the method further includes:

Receiving radio resource control (RRC) signaling or system information sent by the base station;

Parsing the RRC signaling or system information to obtain a feedback manner of the PMI and the first information;

Accordingly, the PMI and the first information are fed back according to the obtained manner.

In the foregoing solution, when the PMI of the sub-band data channel is fed back, and the feedback first information is not empty, one of the following features is satisfied:

The first information independently indicates a precoding vector of the subband control channel;

The first information and the PMI of the subband data channel jointly indicate a precoding vector of the subband control channel.

In the above solution, when the first information and the PMI of the subband data channel jointly indicate a precoding vector of the subband control channel, a PMI of the subband data channel indicates a codeword in a codebook; The first information indicates a precoding vector of a particular location in the codeword.

The embodiment of the present disclosure further provides a PMI-based processing method, including:

Receiving CSI of the subband fed back by the terminal; the bandwidth of the subband corresponds to part or all of the control channel bandwidth;

Parsing the CSI to obtain a PMI and first information; determining, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel; Multi-stream precoding to transmit data.

In the above solution, the manner of determining the precoding matrix of the subband data channel and the precoding vector of the subband control channel by using the PMI and the first information includes one of the following:

Determining a precoding matrix of the subband data channel by using a PMI of the subband data channel when the PMI is a PMI of the subband data channel and the first information is empty; and the subband a vector of a fixed position or a random position in a precoding matrix corresponding to a PMI of the data channel as a precoding vector of the subband control channel;

Determining, by the PMI of the subband data channel, a precoding matrix of the subband data channel when the PMI is a PMI of the subband data channel and the first information is not empty; A message determines a precoding vector of the subband control channel.

In the above solution, the manner of determining the precoding vector of the subband control channel by using the first information includes one of the following manners:

Determining, by the first information, a precoding vector of the subband control channel;

Determining a precoding vector of the subband control channel by using the first information and a PMI of the subband data channel.

In the foregoing solution, the determining, by using the first information and the PMI of the subband data channel, the precoding vector of the subband control channel, including:

Determining a codeword in a codebook by using a PMI of the subband data channel;

And a precoding vector of a specific position in the codeword indicated by the first information is used as a precoding vector of the subband control channel.

In the foregoing solution, before the receiving the CSI of the subband fed back by the terminal, the method further includes:

The feedback manner of the PMI and the first information is indicated to the terminal by RRC signaling or system information.

In the above solution, the method further includes:

When the subband data channel transmits data in a single stream precoding manner, the PMI of the subband data channel is directly used as the PMI of the subband control channel.

The embodiment of the present disclosure further provides a PMI-based processing apparatus, including:

a measurement module for performing channel measurement on the sub-band;

a feedback module, configured to feed back CSI to the base station; wherein,

a receiving unit, configured to receive CSI of a subband fed back by the terminal; a bandwidth of the subband corresponding to part or all of a control channel bandwidth;

a parsing unit, configured to parse the CSI, to obtain a PMI and first information;

a determining unit, configured to determine, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel; and the subband data channel uses a multi-stream precoding manner to transmit data .

The embodiment of the present disclosure further provides a terminal, including:

a first processor, configured to perform channel measurement on the sub-band;

a first communication interface, configured to feed back CSI to the base station; wherein,

In the above solution, the manner in which the first communication interface feeds back the PMI and the first information includes one of the following:

In the foregoing solution, the first communications interface is further configured to receive radio resource control RRC signaling or system information sent by the base station;

The first processor is further configured to parse the RRC signaling or system information, and obtain a feedback manner of the PMI and the first information;

Correspondingly, the first communication interface feeds back the PMI and the first information according to the obtained manner.

The embodiment of the present disclosure further provides a base station, including:

a second communication interface, configured to receive CSI of the subband fed back by the terminal; the bandwidth of the subband corresponds to part or all of the control channel bandwidth;

a second processor, configured to parse the CSI, obtain a PMI and first information; determine, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel; The sub-band data channel transmits data by using a multi-stream precoding method.

In the above solution, the second processor is specifically configured to perform one of the following operations:

In the above solution, the second processor is configured to perform one of the following operations:

In the above solution, the second processor is specifically configured to:

And precoding a specific position in the codeword indicated by the first information as a precoding vector of the subband control channel.

In the above solution, the second communication interface is further configured to: before receiving the CSI of the subband fed back by the terminal, indicate the feedback manner of the PMI and the first information to the terminal by using RRC signaling or system information.

In the above solution, the second processor is further configured to:

The embodiment of the present disclosure further provides a terminal, the terminal comprising: a first processor, a first memory, and a computer program stored on the first memory and capable of running on the first processor;

The first processor is configured to perform the steps of any method on the terminal side when the computer program is executed.

An embodiment of the present disclosure further provides a base station, including: a second processor, a second memory, and a computer program stored on the second memory and capable of running on the second processor;

The second processor is configured to perform the steps of any method on the base station side when the computer program is executed.

The embodiment of the present disclosure further provides a computer readable storage medium having stored thereon a computer program, which when executed by the processor, implements the steps of any method on the terminal side, or implements the steps of any method on the base station side.

The PMI-based processing method, apparatus, terminal, base station, and computer readable storage medium provided by the embodiments of the present disclosure feed back the PMI and the first information when the CSI is fed back when the data channel is transmitted by using the multi-stream precoding method. The fed back PMI and the first information indicate a precoding matrix of the subband data channel and a precoding vector of the subband control channel, and implement feedback of a control channel PMI, thus supporting a single channel precoding transmission mode of the control channel Therefore, the coverage performance of the downlink control channel can be effectively improved, and the reliability of control information transmission is improved.

DRAWINGS

In the drawings, which are not necessarily to scale, the The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

1 is a schematic flowchart of a PMI-based processing method on a terminal side according to an embodiment of the present disclosure;

2 is a schematic diagram of a codebook corresponding to an antenna port according to Embodiment 2 of the present disclosure;

3 is a schematic diagram of a codebook corresponding to an antenna port according to Embodiment 4 of the present disclosure;

4 is a schematic flowchart of a PMI-based processing method on a base station side according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of a PMI-based processing method according to an embodiment of the present disclosure;

6 is a schematic structural diagram of a PMI-based processing apparatus according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of another PMI-based processing apparatus according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a PMI-based processing system according to an embodiment of the present disclosure.

Detailed ways

The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments.

In order to support the closed-loop single-layer precoding scheme of the control channel, one scheme is to directly adopt the PMI of the data channel of a certain sub-band as the PMI of the control channel of the corresponding sub-band. This scheme can be used directly when the data channel uses a single-stream precoding scheme. However, when the terminal feeds back the indication of the multi-layer codeword, that is, the data channel adopts the multi-stream precoding method, it cannot be directly used for the single-layer transmission of the control channel, that is, the PMI of the data channel cannot be directly used as the corresponding sub-director. The PMI of the control channel with.

Based on this, in various embodiments of the present disclosure, when the terminal feeds back CSI to the base station, when the bandwidth of the sub-band corresponds to part or all of the control channel bandwidth, the fed PMI and the first information indicate the pre-sampling of the sub-band data channel. a coding matrix and a precoding vector of the subband control channel; the data channel transmits data by using a multi-stream precoding method; and the CSI of the subband fed back by the terminal is parsed in the base station to obtain a PMI and first information; using the PMI And the first information determines a precoding matrix of the subband data channel and a precoding vector of the subband control channel.

The solution provided by the embodiment of the present disclosure may be understood as a scheme for indicating control channel precoding by using a data channel PMI. When the data channel is transmitted by using the multi-stream precoding method, when the CSI is fed back, the PMI and the first information are fed back. The fed back PMI and the first information indicate a precoding matrix of the subband data channel and a precoding vector of the subband control channel, thereby implementing feedback of a control channel PMI, and thus capable of supporting a control channel single stream precoding transmission The mode can effectively improve the coverage performance of the downlink control channel and improve the reliability of control information transmission.

The embodiment of the present disclosure provides a PMI-based processing method, which is applied to a terminal. As shown in FIG. 1 , the method includes:

Step 101: Perform channel measurement on the subband.

Step 102: Feed back CSI to the base station.

Wherein, when the CSI is fed back, when the bandwidth of the subband corresponds to part or all of the control channel bandwidth, the fed PMI and the first information indicate a precoding matrix of the subband data channel and a preamble of the subband control channel. An encoding vector; the data channel transmits data using a multi-stream precoding method.

It should be noted that when the data channel transmits data in a single-stream pre-coding manner, the PMI fed back by the terminal is the PMI of the data channel, that is, the PMI of the data channel is directly used by the base station as the PMI of the control channel.

The solution provided by the embodiment of the present disclosure, the transmission of data and control information adopts a closed loop transmission mode.

The base station performs configuration of the corresponding transmission mode based on the CSI fed back by the terminal. Specifically, the CSI includes: a Channel Quality Index (CQI), a Rank Indicator (RI, Rand Index), a PMI, and a Precoding Type Index (PTI). The PMI has a direct correspondence with the number of RIs and antenna ports. For example, RI is 1, and PMI corresponds to an indication of a codeword in a single-layer codebook; RI=2, and PMI corresponds to a double-layer code. An indication of a codeword in the present; RI=4/8, the PMI corresponds to a codebook in the 4/8 layer codebook; The codebook corresponding to the 2 antenna ports and the codebook corresponding to the 4 antennas are respectively shown in FIG. 2 and FIG. 3.

The PMI has a direct correspondence with the RI and the number of the antenna ports. In the embodiment of the present disclosure, in the feedback CSI, when the RI=1 (indicating that the data channel uses the single-stream precoding method to transmit data), the base station side can directly adopt The data channel PMI is used as the PMI of the control channel of the corresponding subband; when RI>=2 (indicating that the data channel uses the multi-stream precoding method to transmit data), the PMI and the first information are used to indicate the precoding of the subband data channel. A precoding vector of the matrix and the subband control channel.

Here, in actual application, an extra bit of the PMI of the data channel may be unnecessary, and a vector of a fixed position or a random position in the multi-stream codeword indicated by the PMI of the data channel is selected as the precoding vector of the control channel.

Based on this, in some embodiments, the manner of feeding back the PMI and the first information may be:

Transmitting a PMI of the subband data channel, feeding back a first information that is empty; a PMI of the subband data channel indicating a precoding matrix of a subband data channel; and a vector or random location of a fixed position in the precoding matrix The vector is used by the base station to determine a precoding vector for the subband control channel.

It may also be desirable to feed back additional information bits in addition to the PMI of the data channel to indicate that one of the multi-layer codewords is fed back as a precoding vector of the control channel, which can effectively support unified precoding of the data channel and the control channel. Designed to reduce the number of signaling flows and feedback bits.

Here, when the PMI of the subband data channel is fed back and the feedback first information is not empty, the first information can independently indicate a precoding vector of the subband control channel; or the first information and The PMI of the subband data channel jointly indicates a precoding vector of the subband control channel.

In actual application, the base station and the terminal may pre-determine which one of the above two manners is used to implement the indication of the precoding vector of the subband control channel.

In some embodiments, when the first information and the PMI of the subband data channel jointly indicate a precoding vector of the subband control channel, a PMI of the subband data channel indicates a code in a codebook. a word; the first information indicating a precoding vector of a particular location in the codeword.

Since there are two ways of feeding back the PMI and the first information, in actual application, when the terminal supports two feedback modes, the base station can configure which manner the terminal uses to feed back the PMI and the first information through the high layer signaling.

Based on this, in some embodiments, the method may further include:

Receiving RRC signaling or system information sent by the base station;

Correspondingly, when the CSI is fed back, the PMI and the first information are fed back according to the obtained manner.

Of course, when the terminal only supports one feedback mode, the PMI and the first information are fed back by using a feedback mode supported by the terminal.

The base station needs to perform corresponding processing based on the CSI of the terminal feedback. Based on this, the embodiment of the present disclosure further provides a PMI-based processing method, which is applied to a base station. As shown in FIG. 4, the method includes:

Step 401: Receive CSI of a subband fed back by the terminal.

Here, the bandwidth of the sub-band corresponds to part or all of the control channel bandwidth.

Step 402: Parse the CSI to obtain a PMI and first information.

Step 403: Determine, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel.

The sub-band data channel uses multi-stream pre-coding to transmit data.

Here, in actual application, when the subband data channel transmits data by using a single stream precoding manner, the base station directly uses the PMI of the subband data channel as the PMI of the subband control channel.

As described above, the base station performs configuration of the corresponding transmission mode based on the CSI fed back by the terminal. When configuring the transmission mode, it is necessary to determine a precoding matrix of the subband data channel and a precoding vector of the subband control channel.

Wherein, when determining the precoding vector of the control channel, when RI=1 (indicating that the data channel uses the single stream precoding method to transmit data), the base station side can directly adopt the data channel PMI as the PMI of the control channel corresponding to the subband; When RI>=2 (indicating that the data channel transmits data in a multi-stream precoding manner), the PMI and the first information are used to indicate a precoding matrix of the subband data channel and a precoding vector of the subband control channel.

Here, in actual application, when a vector of a fixed position or a random position in the multi-stream codeword indicated by the PMI of the data channel is selected as a precoding vector of the control channel, that is, the parsed PMI is the subband data. When the PMI of the channel is empty and the first information is empty, the precoding matrix of the subband data channel and the precoding vector of the subband control channel may be determined by:

Determining a precoding matrix of the subband data channel by using a PMI of the subband data channel; and using, as the subband, a vector of a fixed position or a random position in a precoding matrix corresponding to a PMI of the subband data channel The precoding vector of the control channel.

It may also be desirable to feed back additional information bits in addition to the PMI of the data channel to indicate a precoding vector in the feedback multi-layer codeword as the precoding vector of the control channel, ie when the PMI is the subband data channel Determining, by the PMI of the subband data channel, a precoding matrix of the subband data channel; and determining, by using the first information, precoding of the subband control channel, when the PMI is not empty vector.

Since there are two ways of feeding back the PMI and the first information, that is, the base station can determine the precoding matrix of the subband data channel and the precoding of the subband control channel by one of the above two manners. Vector, so in actual application, when the terminal supports two feedback modes, the base station can configure which way the terminal feeds back the PMI and the first information through higher layer signaling.

Based on this, in some embodiments, before the performing CSI of the sub-band fed back by the terminal, that is, before performing step 401, the method may further include:

The base station may independently determine the precoding vector of the subband control channel by using the first information when determining the manner of the precoding vector of the subband control channel by using the first information; or using the first The information and the PMI of the subband data channel jointly determine a precoding vector for the subband control channel.

Here, in actual application, the base station and the terminal may pre-arrange which of the above two methods is used to implement the indication of the precoding vector of the subband control channel. Therefore, the base station can determine the precoding vector of the subband control channel by using the first information according to an agreed indication manner.

In some embodiments, when the first information and the PMI of the sub-band data channel jointly indicate a precoding vector of the sub-band control channel, the base station utilizes a PMI that utilizes the sub-band data channel. Determining a codeword in a codebook;

The base station uses a precoding vector of a specific position in the codeword indicated by the first information as a precoding vector of the subband control channel.

The embodiment of the present disclosure further provides a PMI-based processing method, as shown in FIG. 5, the method includes:

Step 501: The terminal performs channel measurement on the subband and feeds back CSI to the base station.

Step 502: The base station receives the CSI of the subband fed back by the terminal.

Step 503: The base station parses the CSI to obtain a feedback PMI and first information.

Step 504: The base station determines, by using the fed PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel.

It should be noted that the specific processing procedures of the terminal and the base station are detailed above, and are not described herein again.

The PMI-based processing method provided by the embodiment of the present disclosure, when the data channel is transmitted by using the multi-stream pre-coding method, feedbacks the PMI and the first information when the CSI is fed back, and indicates the sub-band with the feedback PMI and the first information. The precoding matrix of the data channel and the precoding vector of the subband control channel implement feedback of the control channel PMI, so that the single channel precoding transmission mode of the control channel can be supported, thereby effectively improving the coverage performance of the downlink control channel. Improve the reliability of control information transmission.

The solution of the present disclosure will be further described in detail below in conjunction with the application examples.

Application Example 1

The application scenario of this application embodiment is as follows: the base station side has 4 antenna ports, and the codebook is as shown in FIG. 3. Within a cell, multiple terminals (including terminal 1, terminal 2, and terminal 3) are configured in a closed loop transmission mode.

In this application embodiment, the base station side fixedly selects the first vector in the feedback codeword as the precoding vector of the control channel.

The step of the base station determining the precoding vector of the control channel of each terminal includes:

First, each terminal feeds back CSI to the base station;

Specifically, the terminal 1 performs channel measurement on the subband corresponding to its control channel, and feeds back CSI;

In the feedback CSI, RI=1, the PMI occupies 4 bits, specifically 0001, combined with the codebook shown in FIG. 3, the single-layer codeword corresponding to the PMI is W ₁ ^{1} =[1–j 1 j ].

The terminal 2 performs channel measurement on the subband corresponding to its control channel, and feeds back CSI;

In the feedback CSI, RI=2, and the PMI occupies 4 bits, specifically 1000. In combination with the codebook shown in FIG. 3, the double-layer codeword corresponding to the PMI is

The terminal 3 performs channel measurement on the subband corresponding to its control channel, and feeds back CSI;

In the feedback CSI, RI=3, and the PMI occupies 4 bits, specifically 1100. In combination with the codebook shown in FIG. 3, the double-layer codeword corresponding to the PMI is

Next, after receiving the CSI fed back by each terminal, the base station side determines a precoding vector of each control channel.

Specifically, for terminal 1, the base station directly adopts W ₁ ^{1} as a precoding vector of the control channel.

For terminal 2, since W ₈ ^{1} is the first precoding vector in the W ₈ ^{{1, 2}} codeword, W ₈ ^{{1} is} used as the precoding vector of the control channel.

For terminal 3, due to

for

The first precoding vector in the codeword, so

A precoding vector that acts as a control channel.

Application Example 2

In this application embodiment, the base station side randomly selects one of the feedback codewords as the precoding vector of the control channel.

First, each terminal feeds back CSI to the base station;

For terminal 2, the base station randomly uses W ₈ ^{2} as the precoding vector of the control channel for terminal 2.

For terminal 3, the base station is randomly used by terminal 3.

A precoding vector that acts as a control channel.

Among them, W ₈ ^{2} is

The second vector in the codeword,

for

The third vector in the codeword.

Application Example 3

In this application embodiment, the base station configures, by using the high layer signaling, a vector of the additional information bit feedback codeword as the precoding vector of the control channel, that is, the first information is not empty.

First, each terminal feeds back CSI to the base station;

At the same time, for the single-stream precoding scheme of the control channel, the first vector in the codeword, that is, W ₈ ^{{1}, has the} best performance. Therefore, according to the indication of the received high-layer signaling, an additional 1 bit indication is required, and the specific design is 0. That is, the bit information that the terminal 2 feeds back to the PMI is 10000.

Meanwhile, for the control channel single-stream precoding scheme, the second vector in the codeword is

The performance is optimal. Therefore, according to the indication of the received high-layer signaling, an additional 2-bit indication is required. The specific design is 01, that is, the bit information of the terminal 3 for the PMI feedback is 110001.

For the terminal 2, the base station determines the precoding vector of the control channel according to the bit information fed back for the PMI, that is, the last one bit of 10000.

The first vector in the codeword, W ₈ ^{1} .

For the terminal 3, the base station determines the precoding vector of the control channel according to the bit information fed back for the PMI, that is, the last 2 bits of the determination of 110001.

The second vector in the codeword, ie

Where W ₈ ^{1} is the first precoding vector in the W ₈ ^{{1, 2}} codeword,

for

The second vector in the codeword.

As can be seen from the solution of the application embodiment, in the solution of the embodiment of the present disclosure:

1. If a subband corresponds to part or all of the control channel bandwidth, perform unified PMI feedback on the data channel and the control channel of the subband;

2. In the feedback CSI, when RI=1, the base station side can directly adopt the data channel PMI as the PMI of the control channel corresponding to the subband.

In the fed back CSI, when RI>=2, and there is no extra bit feedback indicating the precoding vector of the control channel, a vector based on a fixed position or a random position in the multi-stream codeword may be selected as the controlled precoding vector; or When RI>=2, and there is extra bit feedback indicating the precoding vector of the control channel, one of the feedback codewords is indicated as a control precoding vector indication.

Among them, it is assumed that the number of extra bits of feedback is n, and the size of RI is r, requiring: 2 ⁿ ≥ r.

3. The base station can indicate whether the feedback mode of the current terminal requires extra bits by means of high layer signaling.

In order to implement the method of the embodiments of the present disclosure, an embodiment of the present disclosure provides a PMI-based processing device, which is disposed in a terminal. As shown in FIG. 6, the device includes:

a measuring module 61, configured to perform channel measurement on the sub-band;

a feedback module 62, configured to feed back CSI to the base station;

It should be noted that when the data channel transmits data in a single-stream pre-coding manner, the PMI fed back by the feedback module 62 is the PMI of the data channel, that is, the PMI of the data channel is directly used by the base station as the PMI of the control channel.

Here, in actual application, an extra bit of the PMI of the data channel may be unnecessary, and a vector of a fixed position or a random position in the multi-stream codeword indicated by the PMI of the data channel is selected as the precoding vector of the control channel. It may also be desirable to feed back additional information bits in addition to the PMI of the data channel to indicate that one of the multi-layer codewords is fed back as a precoding vector of the control channel, which can effectively support unified precoding of the data channel and the control channel. Designed to reduce the number of signaling flows and feedback bits.

Based on this, in some embodiments, the feedback module 62 is specifically configured to feed back the PMI and the first information in one of the following ways:

Based on this, in some embodiments, the apparatus may further include: a receiving and parsing unit, configured to:

Receiving RRC signaling or system information sent by the base station;

Correspondingly, the feedback unit 62 feeds back the PMI and the first information according to the obtained manner.

It should be noted that the PMI-based processing device provided by the foregoing embodiment is only illustrated by the division of each of the foregoing program modules when performing PMI processing. In actual applications, the foregoing processing may be allocated to different program modules according to requirements. Upon completion, the internal structure of the device is divided into different program modules to perform all or part of the processing described above.

In practical applications, the measurement module 61, the feedback module 62, the receiving and parsing module may be implemented by a processor in a PMI-based processing device in conjunction with a communication interface.

In order to implement the method of the embodiment of the present disclosure, the embodiment of the present disclosure further provides a PMI-based processing device, which is disposed at a base station, as shown in FIG. 7, the device includes:

The receiving unit 71 is configured to receive CSI of the subband fed back by the terminal; the bandwidth of the subband corresponds to part or all of the control channel bandwidth;

The parsing unit 72 is configured to parse the CSI to obtain a PMI and first information.

a determining unit 73, configured to determine, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel; the subband data channel is transmitted by using a multi-stream precoding method data.

Here, in actual application, when the subband data channel transmits data by using a single stream precoding method, the determining unit 73 directly uses the PMI of the subband data channel as the PMI of the subband control channel.

Here, in actual application, when a vector of a fixed position or a random position in the multi-stream codeword indicated by the PMI of the data channel is selected as a precoding vector of the control channel, that is, the parsed PMI is the subband data. When the PMI of the channel is empty, the determining unit 73 is specifically configured to:

It may also be desirable to feed back additional information bits in addition to the PMI of the data channel to indicate a precoding vector of the feedback multi-layer codeword as a precoding vector for the control channel, based on which, in some embodiments, the determining unit 73, specifically for:

Based on this, in some embodiments, the device may further include:

And an indication unit, configured to: before receiving the CSI of the subband fed back by the terminal, indicate, by using RRC signaling or system information, a feedback manner of the PMI and the first information to the terminal.

The determining unit 73 may independently determine a precoding vector of the subband control channel by using the first information when determining, by using the first information, a manner of determining a precoding vector of the subband control channel; The determining unit 73 jointly determines the precoding vector of the subband control channel by using the first information and the PMI of the subband data channel.

In some embodiments, when the first information and the PMI of the subband data channel jointly indicate a precoding vector of the subband control channel, the determining unit 73 utilizes the subband data channel. PMI, determining the codeword in a codebook;

The determining unit 73 uses a precoding vector of a specific position in the codeword indicated by the first information as a precoding vector of the subband control channel.

In practical applications, the receiving unit 71 and the indicating unit may be implemented by a processor in a PMI-based processing device in conjunction with a communication interface; the parsing unit 72 and the determining unit 73 may be implemented by a processor in a PMI-based processing device.

Based on the hardware implementation of the foregoing apparatus, the embodiment of the present disclosure further provides a terminal. As shown in FIG. 8, the terminal 80 includes:

The first communication interface 81 is capable of performing information interaction with the base station;

The first processor 82 is connected to the first communication interface to implement information interaction with the base station, and is used to execute the method provided by one or more technical solutions on the terminal side when the computer program is run.

Specifically, the first processor 82 is configured to perform channel measurement on the subband.

a first communication interface 81, configured to feed back CSI to the base station;

In an embodiment, the manner in which the first communication interface 81 feeds back the PMI and the first information includes one of the following:

In an embodiment, the first communication interface 81 is further configured to receive radio resource control RRC signaling or system information sent by the base station;

The first processor 82 is further configured to parse the RRC signaling or system information to obtain a feedback manner of the PMI and the first information.

Correspondingly, the first communication interface 81 feeds back the PMI and the first information according to the obtained manner.

Of course, in actual application, as shown in FIG. 8, the terminal may further include:

a first memory 83, the computer program being stored on the first memory 83;

User interface 84.

Among them, the components in the terminal 80 are coupled together by the bus system 85. As can be appreciated, bus system 85 is used to implement connection communication between these components. The bus system 85 includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 85 in FIG.

The user interface 84 may include a display, a keyboard, a mouse, a trackball, a click wheel, a button, a button, a touch panel, or a touch screen.

The first memory 83 in the embodiment of the present disclosure is used to store various types of data to support the operation of the terminal 80.

The terminal side method disclosed in the above embodiments of the present disclosure may be applied to the first processor 82 or implemented by the first processor 82. The first processor 82 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the first processor 82 or an instruction in a form of software. The first processor 82 described above may be a general purpose processor, a digital signal processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or the like. The first processor 82 can implement or perform the various methods, steps, and logic blocks disclosed in the embodiments of the present disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present disclosure may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium located in the first memory 83, and the first processor 82 reads the information in the first memory 83 and, in conjunction with its hardware, performs the steps of the foregoing method.

In an exemplary embodiment, the terminal 80 may be configured by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), and Complex Programmable Logic Devices (CPLDs). Complex Programmable Logic Device), Field-Programmable Gate Array (FPGA), General Purpose Processor, Controller, Micro Controller Unit (MCU), Microprocessor, or other electronic components Implemented to perform the aforementioned method.

Based on the hardware implementation of the foregoing apparatus, the embodiment of the present disclosure further provides a base station. As shown in FIG. 9, the base station 90 includes:

The second communication interface 91 is capable of performing information interaction with the base station;

The second processor 92 is connected to the first communication interface to implement information interaction with the base station, and is configured to perform the method provided by one or more technical solutions on the terminal side when the computer program is run.

Specifically, the second communication interface 91 is configured to receive CSI of the subband fed back by the terminal; the bandwidth of the subband corresponds to part or all of the control channel bandwidth;

The second processor 92 is configured to parse the CSI to obtain a PMI and first information, and determine, by using the PMI and the first information, a precoding matrix of the subband data channel and a preamble of the subband control channel. a coding vector; the subband data channel transmits data using a multi-stream precoding method.

In an embodiment, the second processor 92 is specifically configured to perform one of the following operations:

In an embodiment, the second processor 92 is configured to perform one of the following operations:

In an embodiment, the second processor 92 is specifically configured to:

In an embodiment, the second communication interface 91 is further configured to: before receiving the CSI of the subband fed back by the terminal, indicate, by using RRC signaling or system information, a feedback manner of the PMI and the first information to the terminal.

In an embodiment, the second processor 92 is further configured to: when the subband data channel transmits data by using a single stream precoding manner, directly use the PMI of the subband data channel as the subband The PMI of the control channel.

Of course, in actual application, as shown in FIG. 9, the terminal may further include:

A second memory 93, the computer program being stored on the second memory 93.

Among them, the various components in the base station 90 are coupled together by a bus system 94. It will be appreciated that the bus system 94 is used to effect connection communication between these components. The bus system 94 includes, in addition to the data bus, a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 94 in FIG.

The second memory 93 in the disclosed embodiment is for storing various types of data to support the operation of the base station 90.

The method disclosed in the above embodiments of the present disclosure may be applied to the second processor 92 or implemented by the second processor 92. The second processor 92 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the second processor 92 or an instruction in a form of software. The second processor 92 described above may be a general purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or the like. The second processor 92 can implement or perform the various methods, steps, and logic blocks disclosed in the embodiments of the present disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present disclosure may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium located in the second memory 93, and the second processor 92 reads the information in the second memory 93, in conjunction with its hardware, to perform the steps of the foregoing method.

In an exemplary embodiment, base station 90 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general purpose processors, controllers, MCUs, Microprocessors, or other electronic components for performing the aforementioned methods.

It can be understood that the memory (such as the first memory 83 and the second memory 93) in the embodiments of the present disclosure may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory. . The non-volatile memory may be a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), or an Erasable Programmable Read (EPROM). Only Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory , CD-ROM, or Compact Disc Read-Only Memory (CD-ROM); the magnetic surface memory can be a disk storage or a tape storage. The volatile memory can be a random access memory (RAM) that acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access (SSRAM). DRAM (Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), enhancement Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory Bus Random Access Memory (DRRAM) ). The memories described in the embodiments of the present disclosure are intended to include, but are not limited to, these and any other suitable types of memory.

In an exemplary embodiment, an embodiment of the present disclosure further provides a computer readable storage medium, for example, including a first memory 83 storing a computer program, and the computer program stored on the first memory 83 may be a first processor of the terminal 80 82 is executed to complete the steps described in the aforementioned terminal side method; further comprising a second memory 93 storing a computer program, the computer program stored on the second memory 93 being executable by the second processor 92 of the base station 90 to complete the aforementioned base station The method of the side method.

It should be noted that the computer readable storage medium provided by the embodiment of the present disclosure may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM; One or any combination of various devices.

In order to implement the method of the embodiments of the present disclosure, an embodiment of the present disclosure further provides a PMI-based processing system. As shown in FIG. 10, the system includes:

The terminal 101 is configured to perform channel measurement on the sub-band and feed back CSI to the base station 102. When the CSI is fed back, when the bandwidth of the sub-band corresponds to part or all of the control channel bandwidth, the PMI and the first information indication are fed back. Deriving a precoding matrix with a data channel and a precoding vector of the subband control channel; the data channel transmitting data by using a multi-stream precoding method;

The base station 102 is configured to receive CSI of the subband of the terminal feedback 101; parse the CSI to obtain the fed back PMI and the first information; and determine the precoding of the subband data channel by using the feedback PMI and the first information. A precoding vector of the matrix and the subband control channel.

It should be noted that the specific processing procedures of the terminal 101 and the base station 102 have been described in detail above, and are not described herein again.

The above description is only for the preferred embodiments of the present disclosure, and is not intended to limit the scope of the disclosure.

Claims

A processing method for indicating a PMI based on a precoding matrix, the method comprising:

Performing channel measurement on the subband and feeding back channel state information CSI to the base station;

When the CSI is fed back, when the bandwidth of the subband corresponds to part or all of the control channel bandwidth, the fed back PMI and the first information indicate a precoding matrix of the subband data channel and a precoding vector of the subband control channel. The data channel transmits data using a multi-stream precoding method.
The method of claim 1, wherein the manner of feeding back the PMI and the first information comprises one of the following:

Transmitting a PMI of the subband data channel, feeding back a first information that is empty; a PMI of the subband data channel indicating a precoding matrix of a subband data channel; and a vector or random location of a fixed position in the precoding matrix The vector is used by the base station to determine a precoding vector of the subband control channel;

And feeding back a PMI of the subband data channel, and feeding back the first information is not empty, where the first information is used by the base station to determine a precoding vector of the subband control channel.
The method of claim 2, wherein the method further comprises:

Receiving radio resource control RRC signaling or system information sent by the base station;

Parsing the RRC signaling or system information to obtain a feedback manner of the PMI and the first information;

Accordingly, the PMI and the first information are fed back according to the obtained manner.
The method according to claim 2, wherein when the PMI of the sub-band data channel is fed back and the feedback first information is not empty, one of the following features is satisfied:

The first information independently indicates a precoding vector of the subband control channel;

The first information and the PMI of the subband data channel jointly indicate a precoding vector of the subband control channel.
The method according to claim 4, wherein when the first information and the PMI of the subband data channel jointly indicate a precoding vector of the subband control channel, a PMI of the subband data channel indicates a code a codeword in the present; the first information indicating a precoding vector of a particular location in the codeword.
A PMI-based processing method, including:

Receiving CSI of the subband fed back by the terminal; the bandwidth of the subband corresponds to part or all of the control channel bandwidth;

Parsing the CSI to obtain a PMI and first information; determining, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel; Multi-stream precoding to transmit data.
The method of claim 6, wherein the manner of determining the precoding matrix of the subband data channel and the precoding vector of the subband control channel using the PMI and the first information comprises one of the following:

Determining a precoding matrix of the subband data channel by using a PMI of the subband data channel when the PMI is a PMI of the subband data channel and the first information is empty; and the subband a vector of a fixed position or a random position in a precoding matrix corresponding to a PMI of the data channel as a precoding vector of the subband control channel;

Determining, by the PMI of the subband data channel, a precoding matrix of the subband data channel when the PMI is a PMI of the subband data channel and the first information is not empty; A message determines a precoding vector of the subband control channel.
The method of claim 7 wherein said means for determining a precoding vector of said subband control channel using said first information comprises one of:

Determining, by the first information, a precoding vector of the subband control channel;

Determining a precoding vector of the subband control channel by using the first information and a PMI of the subband data channel.
The method according to claim 8, wherein the determining, by the PMI of the first information and the subband data channel, the precoding vector of the subband control channel comprises:

Determining a codeword in a codebook by using a PMI of the subband data channel;

And a precoding vector of a specific position in the codeword indicated by the first information is used as a precoding vector of the subband control channel.
The method according to claim 7, wherein before the receiving the CSI of the subband fed back by the terminal, the method further comprises:

The feedback manner of the PMI and the first information is indicated to the terminal by RRC signaling or system information.
The method of any of claims 6 to 10, wherein the method further comprises:

When the subband data channel transmits data in a single stream precoding manner, the PMI of the subband data channel is directly used as the PMI of the subband control channel.
A PMI-based processing device comprising:

a measurement module for performing channel measurement on the sub-band;

a feedback module, configured to feed back CSI to the base station; wherein,

When the CSI is fed back, when the bandwidth of the subband corresponds to part or all of the control channel bandwidth, the fed back PMI and the first information indicate a precoding matrix of the subband data channel and a precoding vector of the subband control channel. The data channel transmits data using a multi-stream precoding method.
A PMI-based processing device comprising:

a receiving unit, configured to receive CSI of a subband fed back by the terminal; a bandwidth of the subband corresponding to part or all of a control channel bandwidth;

a parsing unit, configured to parse the CSI, to obtain a PMI and first information;

a determining unit, configured to determine, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel; and the subband data channel uses a multi-stream precoding manner to transmit data .
A terminal comprising:

a first processor, configured to perform channel measurement on the sub-band;

a first communication interface, configured to feed back CSI to the base station; wherein,

When the CSI is fed back, when the bandwidth of the subband corresponds to part or all of the control channel bandwidth, the fed back PMI and the first information indicate a precoding matrix of the subband data channel and a precoding vector of the subband control channel. The data channel transmits data using a multi-stream precoding method.
The terminal according to claim 14, wherein the manner in which the first communication interface feeds back the PMI and the first information comprises one of the following:

Transmitting a PMI of the subband data channel, feeding back a first information that is empty; a PMI of the subband data channel indicating a precoding matrix of a subband data channel; and a vector or random location of a fixed position in the precoding matrix The vector is used by the base station to determine a precoding vector of the subband control channel;

And feeding back a PMI of the subband data channel, and feeding back the first information is not empty, where the first information is used by the base station to determine a precoding vector of the subband control channel.
The terminal according to claim 15, wherein

The first communication interface is further configured to receive radio resource control RRC signaling or system information sent by the base station;

The first processor is further configured to parse the RRC signaling or system information, and obtain a feedback manner of the PMI and the first information;

Correspondingly, the first communication interface feeds back the PMI and the first information according to the obtained manner.
A base station comprising:

a second communication interface, configured to receive CSI of the subband fed back by the terminal; the bandwidth of the subband corresponds to part or all of the control channel bandwidth;

a second processor, configured to parse the CSI, obtain a PMI and first information; determine, by using the PMI and the first information, a precoding matrix of the subband data channel and a precoding vector of the subband control channel; The sub-band data channel transmits data by using a multi-stream precoding method.
The base station according to claim 17, wherein the second processor is specifically configured to perform one of the following operations:

Determining a precoding matrix of the subband data channel by using a PMI of the subband data channel when the PMI is a PMI of the subband data channel and the first information is empty; and the subband a vector of a fixed position or a random position in a precoding matrix corresponding to a PMI of the data channel as a precoding vector of the subband control channel;

Determining, by the PMI of the subband data channel, a precoding matrix of the subband data channel when the PMI is a PMI of the subband data channel and the first information is not empty; A message determines a precoding vector of the subband control channel.
The base station according to claim 18, wherein said second processor is configured to perform one of the following operations:

Determining, by the first information, a precoding vector of the subband control channel;

Determining a precoding vector of the subband control channel by using the first information and a PMI of the subband data channel.
The base station according to claim 19, wherein the second processor is specifically configured to:

Determining a codeword in a codebook by using a PMI of the subband data channel;

And precoding a specific position in the codeword indicated by the first information as a precoding vector of the subband control channel.
The base station according to claim 18, wherein the second communication interface is further configured to: before receiving the CSI of the subband fed back by the terminal, indicate the feedback manner of the PMI and the first information by using RRC signaling or system information. Said terminal.
The base station according to any one of claims 17 to 21, wherein the second processor is further configured to:

When the subband data channel transmits data in a single stream precoding manner, the PMI of the subband data channel is directly used as the PMI of the subband control channel.
A terminal comprising: a first processor, a first memory, and a computer program stored on the first memory and capable of running on the first processor;

Wherein the first processor is configured to perform the steps of the method of any one of claims 1 to 5 when the computer program is run.
A base station includes: a second processor, a second memory, and a computer program stored on the second memory and capable of running on the second processor;

Wherein the second processor is operative to perform the steps of the method of any one of claims 6 to 11 when the computer program is run.
A computer readable storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to perform the steps of the method of any one of claims 1 to 5, or to implement any of claims 6 to The steps of the method described.