CN117394887A

CN117394887A - Indication method of precoding matrix, terminal and network side equipment

Info

Publication number: CN117394887A
Application number: CN202210760643.0A
Authority: CN
Inventors: 孙荣荣; 刘昊; 塔玛拉卡·拉盖施; 吴昊
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2024-01-12
Also published as: WO2024001981A1

Abstract

The embodiment of the application discloses a precoding matrix indicating method, a terminal and network side equipment, belonging to the technical field of communication, wherein the precoding matrix indicating method comprises the following steps: the terminal receives DCI, wherein the DCI comprises a first indication domain, and the first indication domain is used for indicating at least one of the following: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not; and the terminal determines a precoding matrix of uplink transmission according to the first indication domain.

Description

Indication method of precoding matrix, terminal and network side equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to an indication method of a precoding matrix, a terminal and network side equipment.

Background

For codebook-based physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) transmission, the network side device configures sounding reference signal (Sounding Reference Signal, SRS) resource sets for the terminal, where each SRS resource set includes at least one SRS resource, so that the terminal transmits the SRS according to the configured at least one SRS resource. The network side device obtains an uplink channel by receiving the SRS, and determines a precoding matrix for PUSCH transmission based on the uplink channel. After determining the precoding matrix, the network side device also needs to notify the terminal of the precoding matrix used by the terminal, however, a corresponding scheme is not provided in the related art, so that the communication of the terminal is affected.

Disclosure of Invention

The embodiment of the application provides a precoding matrix indicating method, a terminal and network side equipment, which can solve the problem that the terminal communication is affected because the terminal cannot determine the uplink precoding matrix.

In a first aspect, there is provided a method for indicating a precoding matrix, including: the terminal receives Downlink Control Information (DCI), wherein the DCI comprises a first indication domain, and the first indication domain is used for indicating at least one of the following: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not; and the terminal determines a precoding matrix of uplink transmission according to the first indication domain.

In a second aspect, there is provided a method for indicating a precoding matrix, including: the network side equipment sends DCI, wherein the DCI comprises a first indication domain, the first indication domain is used for determining a precoding matrix of uplink transmission by a terminal, and the first indication domain is used for indicating at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

In a third aspect, an indicating device for a precoding matrix is provided, including: a receiving module, configured to receive DCI, where the DCI includes a first indication field, where the first indication field is configured to indicate at least one of: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not; and the sending module is used for determining a precoding matrix of uplink transmission according to the first indication domain.

In a fourth aspect, an indicating device for a precoding matrix is provided, including: a sending module, configured to send DCI, where the DCI includes a first indication field, where the first indication field is used for determining a precoding matrix of uplink transmission by a terminal, and the first indication field is used for indicating at least one of: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is configured to receive DCI, and the DCI includes a first indication field, and the first indication field is configured to indicate at least one of: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not; and determining a precoding matrix of uplink transmission according to the first indication domain.

In a seventh aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the second aspect.

An eighth aspect provides a network side device, including a processor and a communication interface, where the communication interface is configured to send DCI, where the DCI includes a first indication field, where the first indication field is used by a terminal to determine a precoding matrix of uplink transmission, and the first indication field is used to indicate at least one of: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

In a ninth aspect, there is provided an indication system of a precoding matrix, including: a terminal operable to perform the steps of the method as described in the first aspect, and a network side device operable to perform the steps of the method as described in the second aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect or performs the steps of the method according to the second aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions, implementing the steps of the method as described in the first aspect, or implementing the steps of the method as described in the second aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the method as described in the first aspect or to implement the steps of the method as described in the second aspect.

In this embodiment of the present application, the network side device indicates, through a first indication field in DCI, a precoding matrix of uplink transmission of a terminal, and may specifically indicate at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix and the transmission layer information of the precoding matrix, and whether full power transmission is used or not, so that the terminal can determine the precoding matrix of uplink transmission according to the first indication domain, and the performance of a communication system is improved.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a method of indicating a precoding matrix in accordance with an embodiment of the present application;

fig. 3 is a schematic flow chart of a method of indicating a precoding matrix in accordance with an embodiment of the present application;

fig. 4 is a schematic structural diagram of an indicating device of a precoding matrix according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an indicating device of a precoding matrix according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 7 is a schematic structural view of a terminal according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network-side device according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but also May be used in other wireless communication systems such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (SC-carrier Frequency Division Multiple Access), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a new air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or core network device, wherein the access network device may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. The access network device may include a base station, a WLAN access point, a WiFi node, or the like, where the base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmitting/receiving point (TransmittingReceivingPoint, TRP), or some other suitable terminology in the field, so long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only a base station in an NR system is described as an example, and a specific type of the base station is not limited.

The following describes in detail, with reference to the attached drawings, a method for indicating a precoding matrix provided by the embodiments of the present application through some embodiments and application scenarios thereof.

As shown in fig. 2, an embodiment of the present application provides a method 200 for indicating a precoding matrix, which may be performed by a terminal, in other words, by software or hardware installed in the terminal, and includes the following steps.

S202: the terminal receives downlink control information (Downlink Control Information, DCI) comprising a first indication field for indicating at least one of: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

The precoding matrix generation mode comprises the following steps: generating a precoding matrix according to at least two precoding matrices, for example, generating a precoding matrix supporting 8-port PUSCH transmission according to two precoding matrices supporting 4-port PUSCH transmission; for another example, one precoding matrix supporting 8-port PUSCH transmission is generated from four precoding matrices supporting 2-port PUSCH transmission.

For the information of the selected antenna ports, for example, the terminal configures transmission of 8 antenna ports, and the network side device may indicate, through the first indication field, information of 4 antenna ports used by the terminal; or, the terminal is instructed to transmit PUSCH using 8 antenna ports through the first indication field.

For the above information of the valid precoding matrix, optionally, the DCI further includes M precoding information indication fields, or referred to as a transmission precoding matrix indication (Precoding information and number of layers) field, generally abbreviated as a TPMI field, where the M precoding information indication fields are used to indicate a precoding matrix used by the terminal. In this example, the network side device may further indicate information of the valid precoding matrix from the precoding matrix indicated in the TPMI domain through the first indication domain. In this way, the terminal can further determine the information of the effective precoding matrix from the precoding matrix indicated by the TPMI domain according to the first indication domain.

For the above-mentioned generation method of the precoding matrix, for example, two TPMI fields indicate two precoding matrices W1 and W2, and the terminal further determines, according to the first indication field, the manner in which the two precoding matrices generate one precoding matrix W, for example Or (F)>Or (F)> Representing the kronecker product of the two matrices.

For the above information of the selected antenna ports, for example, the 8 antenna ports are divided into two groups, and the first indication field indicates which group or groups of antenna ports are selected for transmission.

For the information of the valid precoding matrix, for example, the DCI includes two precoding indication fields, and the first indication field indicates that the indication field is valid or both indication fields are valid.

For the above-mentioned transmission layer information of the precoding matrix, for example, the terminal generates a precoding matrix 3 according to the precoding matrix 1 and the precoding matrix 2, and the network side device may indicate, through the first indication field, whether the transmission layer of the precoding matrix 3 is equal to the transmission layer of the precoding matrix 1 or equal to the transmission layer of the precoding matrix 2; or equal to the sum of the transmission layer of precoding matrix 1 and the transmission layer of precoding matrix 2.

For the above-mentioned use of full power transmission, for example, the network side device may indicate that the terminal uses full power transmission through the first indication domain, and may also indicate that the terminal does not use full power transmission through the first indication domain.

The terminal may further determine a precoding matrix for full power transmission according to the generating manner of the precoding matrix indicated by the first indication field, so as to achieve full power transmission, for example, when the two TPMI fields indicate that the two precoding matrices W1 and W2 are at least one non-zero element in each row, the terminal further determines the manner of generating one precoding matrix W by the two precoding matrices according to the first indication field, The transmission power of all antenna ports of the terminal is non-zero and full power transmission is achieved.

S204: and the terminal determines a precoding matrix of uplink transmission according to the first indication domain.

After S204, the terminal may also transmit PUSCH according to the determined precoding matrix.

Optionally, the DCI further includes M precoding information indication fields, where the M precoding information indication fields are used to indicate a precoding matrix used by the terminal, the M precoding information indication fields correspond to N codebook subsets configured by the network side device, and M and N are positive integers. For example, m=2, n=2, and 2 precoding information indicates that the fields correspond to 2 codebook subsets configured by the network side device one by one; for another example, m=4, n=4, 4 precoding information indicates that the domains correspond to 4 codebook subsets configured by the network side device one by one; as another example, m=2, n=4, and each precoding information indication field corresponds to 2 codebook subsets configured by the network side device.

In this step, the determining, by the terminal, the precoding matrix for uplink transmission according to the first indication field includes: and the terminal determines a precoding matrix of uplink transmission according to the first indication domain and the M precoding information indication domains.

Optionally, the bit length of the first indication field is related to one of the following 1), 2) and 3):

1) The number N of codebook subsets configured by the network side equipment.

In this embodiment, the bit length of the first indication field depends on the number N of configured codebook subsets, e.g. the bit length of the first indication field is obtained by the following calculation:

or (F)>Or (F)>

2) The precoding information included in the DCI indicates the number M of fields.

In this embodiment, the bit length of the first indication field depends on M, for example, the bit length of the first indication field is obtained by the following calculation formula:

or (F)>Or (F)>

3) The length of the first indication field depends on the maximum value Q of the number N of codebook subsets and the number M of precoding information indication fields, e.g. the bit length of the first indication field is obtained by the following calculation:

or (F)>Or (F)>

According to the indicating method of the precoding matrix, the network side equipment indicates the precoding matrix of the uplink transmission of the terminal through the first indication domain in the DCI, and specifically can indicate at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix and the transmission layer information of the precoding matrix, and whether full power transmission is used or not, so that the terminal can determine the precoding matrix of uplink transmission according to the first indication domain, and the performance of a communication system is improved.

According to the indicating method of the precoding matrix, through the first indicating domain in the DCI, the first indicating domain can indicate the precoding matrix generation mode of full power transmission besides the information of antenna grouping and the information of the effective precoding matrix, the 8Tx transmission can be realized without introducing a new 8Tx precoding matrix, and the full power transmission can be supported while flexible precoding matrix indication can be realized.

Based on the above embodiments of the present application, before the terminal receives DCI, the method further includes: the terminal receives configuration information, which may be carried by radio resource control (Radio Resource Control, RRC) signaling, including a configuration of a subset of N codebooks, N being a positive integer.

Optionally, the terminal is configured with transmission of 8 antenna ports; where n=1, 2 or 4.

Optionally, the configuration of each of the codebook subsets includes at least one of the following information:

1) Maximum transmission rank. For example, the maximum transmission rank is 1,2,4, etc.

2) Coherence of antenna ports. The coherence of the antenna ports may be a subset of the set { full coherence, partial coherence, incoherent }, e.g., may be all coherent (or referred to as full coherence and partial coherence); as another example, all of the components may be incoherent.

3) The horizontal oversampling factor. The horizontal oversampling factor O1 may be 2 or 4.

4) The vertical oversampling factor. The vertical oversampling factor O2 may be 2 or 4.

5) Antenna grouping mode. For example, two groups of 4 antenna ports are included in each group; for another example, four groups, each group containing 2 antenna ports; for another example, two groups are provided, one group including 4 antenna ports and the other group including 2 antenna ports.

6) Antenna polarization. For example, a monopolar mode or a bipolar mode.

7) The number of antenna ports. For example, 4 antenna port 4Tx,2 antenna port 2Tx,8 antenna port 8Tx.

8) Phase set between antenna groups. For example, the phase between antenna groups may be selected from the set {1, j, -j, -1 }.

Optionally, the configuration information further includes information for indicating a Full power transmission mode, for example, includes information for indicating a Full power transmission mode 1 (Full-power mode 1), and includes information for indicating a Full power transmission mode 2 (Full-power mode 2).

Optionally, before the terminal receives the configuration information, the method further includes: the terminal reports terminal capability information, wherein the terminal capability information comprises at least one of the following components:

1) The horizontal oversampling factor. The horizontal oversampling factor O1 may be 2 or 4.

2) The vertical oversampling factor. The vertical oversampling factor O2 may be 2 or 4.

3) Antenna grouping mode. For example, two groups of 4 antenna ports are included in each group; for another example, four groups, each group containing 2 antenna ports; for another example, two groups are provided, one group including 4 antenna ports and the other group including 2 antenna ports.

4) Antenna polarization. For example, a monopolar mode or a bipolar mode.

5) The number of antenna ports. For example, 4 antenna port 4Tx,2 antenna port 2Tx,8 antenna port 8Tx.

6) Phase set between antenna groups. For example, the phase between antenna groups may be selected from the set {1, j, -j, -1 }.

7) Antenna grouping for full power transmission. For example, two groups, one 4-port antenna within each group.

8) Precoding information for full power transmission.

In case that N is greater than 1, the precoding information of the full power transmission mentioned in 8) above may include N sets of precoding matrices, where the N sets of precoding matrices are in one-to-one correspondence with N sets of antenna ports of the terminal, for example, the terminal reports two sets of 4Tx precoding information, and each set of precoding information is indicated by 4 bits; for another example, the terminal reports four sets of 2Tx precoding information, each set of precoding information being indicated by 2 bits.

In case that N is greater than 1, the precoding information of the full power transmission mentioned in 8) above may further include a set of precoding matrices, wherein information of the set of precoding matrices corresponds to N sets of antenna ports of the terminal.

For an embodiment in which N sets of antennas report a set of precoding information, the set of precoding matrices includes at least one of the following cases one to five:

case one: an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein, the coherence of the antenna port of the terminal is incoherent (non-coherent).

In this embodiment, for a non-coherent terminal (non-coherent UE), two 4Tx precoding matrices are adopted to form an 8Tx precoding matrix, and the precoding matrix for full power transmission reported by the terminal includes at least one of the following tables:

for one terminal, one terminal may report a certain row in the table, for example, one terminal reports the precoding matrix of the full power transmission in G5.

And a second case: an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 4 antenna ports of the terminal are a set of coherent ports.

In this embodiment, for a terminal with 4 antennas as a set of coherent ports, two 4Tx precoding matrices are adopted to form an 8Tx precoding matrix, and the precoding matrix for full power transmission reported by the terminal includes at least one of the following tables:

and a third case: an 8-antenna port precoding matrix formed by four 2-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the terminal are a group of coherent ports.

In this embodiment, for a UE (2+2+2+2) with two antennas being a set of coherent ports, 2 4TX precoding matrices are adopted to form an 8TX precoding matrix, and the precoding matrix for full power transmission reported by the terminal includes at least one of the following tables:

case four: an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the terminal are a group of coherent ports.

In this embodiment, for a UE (2+2+2+2) with two antennas as a set of coherent ports, two 4Tx precoding matrices are adopted to form an 8Tx precoding matrix, and the precoding matrix for full power transmission reported by the terminal includes at least one of the following tables.

Case five: a precoding matrix of 8 antenna ports is formed by using a precoding matrix of 2 antenna ports and a precoding matrix of 4 antenna ports.

Optionally, the coherence of the N codebook subsets included in the configuration information received by the terminal is determined according to the antenna coherence and/or the full power transmission mode reported by the terminal.

In one example, the coherence of the antenna reported by the terminal is incoherent, and the coherence of the N codebook subsets included in the configuration information includes: { incoherent, incoherent }, i.e., { non-coherent, non-coherent }.

In one example, the coherence of the antenna reported by the terminal is incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information includes: { all of the components are incoherent, all of the components are incoherent }, i.e., { full-partial-non, full-partial-non }.

In one example, the coherence of the antenna reported by the terminal is partially coherent and incoherent, and the coherence of the N codebook subsets included in the configuration information includes one of the following: { partially incoherent, partially incoherent }, i.e., { partial-non-coherent }; { incoherent, incoherent }, i.e., { non-coherent, non-coherent }; { partial coherence, partial coherence }, i.e., { partial-coherent }; { partially coherent, incoherent }, i.e., { partial-coherent, non-coherent }.

In one example, the antenna coherence reported by the terminal is partial coherence and incoherent, the full power transmission mode reported is mode one, and the coherence of the N codebook subsets included in the configuration information includes: { all of the components are incoherent, all of the components are incoherent }, i.e., { full-partial-non, full-partial-non }.

In order to describe the indication method of the precoding matrix provided in the embodiment of the present application in detail, the following description will be made with reference to several specific embodiments, and the following embodiments will take a terminal configured with 8 antenna ports (abbreviated as 8 Tx) as an example, however, the number of the antenna ports in the embodiment of the present application is not limited to this.

Example 1

This embodiment divides 8Tx into two groups, with the antennas in each group being fully coherent, and group-to-group incoherent, i.e., 4+4.

The precoding indication in the DCI received by the terminal includes: first indication field+tpmi1+tpmi2.

The network is configured with a TPMI1 and a TPMI2 corresponding to a codebook subset 1 and a codebook subset 2 respectively, the codebook subset 1 and the codebook subset 2 meet the requirement that the maximum transmission rank is 4, the coherence characteristic is { full-coherent } or { full-partial-non-coherent }, and the antenna port is 4.

The terminal obtains a precoding matrix of uplink transmission according to a first indication field +tpmi1+tpmi2, and the 8Tx antennas are respectively associated with TPMI1 and TPMI2 in two groups, wherein the first indication field is interpreted as follows:

Value (Value)	Indication (indication)
		0	G1
1	G2
		2	G1,G2
3	Reservation (Reserved)

Wherein Gi is the i-th group of antennas; TPMI1 and TPMI2 correspond to the first coherent antenna group and the second coherent antenna group selected by the first indication field, respectively, and for the unselected antenna groups, the element of the precoding matrix is 0, and no layer is transmitted. The transport layer is the sum of layers (layers) indicated by TPMI1 and TPMI 2.

TPMI1 and TPMI2 are interpreted as follows:

if the network side configures the full power transmission mode 1, the terminal obtains a precoding matrix of uplink transmission according to the first indication field +tpmi1+tpmi2. The codebook subsets corresponding to TPMI1 and TPMI2 may be full-partial-non-sphere; or partial-non-coherent; or non-coherent, wherein:

the first indication field is interpreted as follows:

value of	Indication of
		0	G1
1	G2
		2	G1, G2; state 1
3	G1, G2; state 2

Wherein Gi is the i-th group of coherent antennas; state 1 indicates a layer whose transport layer is TPMI1 or TPMI2, and state 2 indicates a sum of layers whose transport layers are TPMI1 and TPMI 2. For example, the precoding matrices indicated by the two TPMI domains are respectively W ₁ And W is ₂ The 8Tx precoding matrix corresponding to the different first indication field values may be:

TPMI1 and TPMI2 are interpreted as follows (W1 and W2):

example two

In this embodiment, for the codebook subset, the grouping is that 8Tx is divided into four groups, and the antennas in each group are fully coherent, and the groups are not coherent, i.e., 2+2+2+2.

Precoding indication scheme one: and limiting the maximum transmission rank to 4, wherein at most 2 groups of antennas can be selected for transmission in the 4 groups of antennas, and precoding instructions in DCI received by the terminal comprise: first indication field+tpmi1+tpmi2.

The network side is configured with a TPMI1 and a TPMI2 corresponding to a codebook subset 1 and a codebook subset 2 respectively, wherein the codebook subset 1 and the codebook subset 2 meet the maximum transmission rank of 2, the coherence characteristic is { non-coherent } or full-non-coherent, and the antenna port is 2; the terminal obtains a precoding matrix of uplink transmission according to a first indication field +tpmi1+tpmi2, wherein the first indication field is interpreted as follows:

value of	Indication of
		0	G1
1	G2
		2	G3
3	G4
		4	G1,G2
5	G1,G3
		6	G1,G4
7	G2,G3
		8	G2,G4
9	G3,G4
		10-15	Reservation of

Wherein Gi is the i-th group of coherent antennas; TPMI1 and TPMI2 correspond to the first coherent antenna group and the second coherent antenna group selected by the first indication field, respectively, and for the unselected antenna groups, the element of the precoding matrix is 0. The transport layer is the layer sum indicated by TPMI1 and TPMI2.

TPMI1 and TPMI2 are interpreted as follows:

if the network side configures the full power transmission mode 1, the terminal obtains a precoding matrix of uplink transmission according to a first indication field +tpmi1+tpmi2, wherein the first indication field is interpreted as follows:

/>

wherein Gi is the i-th group of coherent antennas; the TPMI1 and the TPMI2 respectively correspond to the first coherent antenna group and the second coherent antenna group selected by the first indication domain, or the first second coherent antenna group and the third fourth antenna group, that is, the precoding corresponding to the first and the second coherent antennas is indicated by the TPMI1, and the same layer is transmitted, and the third and the fourth antenna groups are determined by the TPMI2 to transmit the same layer. For the unselected antenna groups, the element of the precoding matrix is 0. State 1 indicates a layer whose transport layer is TPMI1 or TPMI2, and state 2 indicates a sum of layers whose transport layers are TPMI1 and TPMI2.

TPMI1 and TPMI2 are interpreted as follows:

precoding indication scheme two: the maximum transmission rank is limited to 8, and the precoding indication in the DCI received by the terminal comprises: tpmi1+tpmi2+tpmi3+tpmi4:

configuring a TPMI1, a TPMI2, a TPMI3 and a TPMI4 on a network side to respectively correspond to a codebook subset 1, a codebook subset 2, a codebook subset 3 and a codebook subset 4; codebook subset 1-4 satisfies a maximum transmission rank of 2, coherence property of { non-coherent } or full-non-coherent or full-coherent, and antenna port of 2. And the terminal obtains an uplink transmission precoding matrix according to the TPMI1-4 information. Wherein, TPMI1-4 respectively correspond to 4 coherent antenna groups, when TPMI i indicates a reserved (reserved) entry, it indicates that the precoding element of the antenna group corresponding to TPMI i is 0, and the layer of the transmission layer is 0; the transport layer is the layer sum indicated by the valid TPMI i.

TPMI1-4 was interpreted as follows:

if the network side configures the full power transmission mode 1, the terminal obtains an uplink transmission precoding matrix according to the first indication field +tpmi1-4 information. Wherein the first indication field is interpreted as follows:

value of	Indication of
		0	State 1
1	State 2
		12-15	Reservation of

State 1 indicates a layer for which the transport layer is any valid TPMI indication, and state 2 indicates a sum of layers for which the transport layer is a valid TPMI indication.

TPMI1-4 was interpreted as follows:

example III

In this embodiment, for the codebook subset, the grouping is 8Tx divided into two groups, and two of the 4 antenna ports in each group are a group of coherent antennas, i.e., 2+2.

The network side configures the TPMI1 and the TPMI2 to respectively correspond to the codebook subset 1 and the codebook subset 2; codebook subset 1 and codebook subset 2 satisfy a maximum transmission rank of 4, the coherence property is { non-coherent } or partial-non-coherent, and the antenna port is 4; and the terminal obtains an uplink transmission precoding matrix according to the first indication field +TPMI1+TPMI2 information. The 8Tx antennas are associated with TPMI1 and TPMI2, respectively, in two groups, with the first indication field interpreting the job in:

value of	Indication of
		0	G1
1	G2
		2	G1,G2
3	Reservation of

Wherein Gi is the i-th group of antennas; TPMI1 and TPMI2 correspond to the first coherent antenna group and the second coherent antenna group selected by the first indication field, respectively, and for the unselected antenna groups, the precoding element is 0, and no layer is transmitted. The transport layer is the layer sum indicated by TPMI1 and TPMI2.

TPMI1 and TPMI2 are interpreted as follows:

if the network side configures the full power transmission mode 1, the terminal obtains an uplink transmission precoding matrix according to a first indication field +tpmi1+tpmi2, where the first indication field is interpreted as follows:

Value of	Indication of
		0	G1
1	G2
		2	G1, G2; state 1
3	G1, G2; state 2

Wherein Gi is the i-th group of coherent antennas; state 1 indicates a layer indicated by a transport layer of TPMI1 or TPMI2, and codebook subsets corresponding to TPMI1 and TPMI2 satisfy a full-partial-non or non-local state 2 indicates a sum of layers indicated by a transport layer of TPMI1 and TPMI 2.

TPMI1 and TPMI2 are interpreted as follows:

example IV

In this embodiment, all 8Tx is irrelevant, and the network side configures two sets of codebook subsets corresponding to { non-coherent, non-coherent }, respectively, and the first indication field indicates as follows:

value of	Indication of
		0	G1
1	G2
		2	G1,G2
3	Reservation of

When full power transmission mode 1 is configured, the two codebook subsets may be { non-sphere, non-sphere }, or { full-partial-non, full-partial-non }, the first indication field is indicated as follows:

value of	Indication of
		0	G1
1	G2
		2	G1, G2; state 1
3	G1, G2; state 2

Example five

In this embodiment, 8Tx is all incoherent, 8 antenna ports are considered as 8 groups, the first indication field is indicated as follows:

value of	Indication of
		0	G1, G2; state 1
1	G1, G2; state 2

The TPMI field indicates the antenna port selection.

Example six

The network side configures two codebook subsets as 2TX full coherence and 4TX full coherence respectively; or 2TX full coherent and incoherent, 4TX full coherent and incoherent, and one 8TX precoding matrix may be generated when the first indication field indicates that the precoding matrix selected by the TPMI field in the DCI from both codebook subsets is valid.

The method for indicating the precoding matrix according to the embodiment of the present application is described in detail above with reference to fig. 2. A method of indicating a precoding matrix according to another embodiment of the present application will be described in detail with reference to fig. 3. It will be appreciated that the interaction of the network side device with the terminal described from the network side device is the same as or corresponds to the description of the terminal side in the method shown in fig. 2, and the relevant description is omitted as appropriate to avoid repetition.

Fig. 3 is a schematic flow chart of an implementation of an indication method of a precoding matrix in an embodiment of the present application, which may be applied to a network side device. As shown in fig. 3, the method 300 includes the following steps.

S302: the network side equipment sends DCI, wherein the DCI comprises a first indication domain, the first indication domain is used for determining a precoding matrix of uplink transmission by a terminal, and the first indication domain is used for indicating at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

Optionally, as an embodiment, the DCI further includes M precoding information indication fields, where the M precoding information indication fields are used to indicate a precoding matrix used by the terminal, and the M precoding information indication fields correspond to N codebook subsets configured by the network side device; m and N are positive integers.

Optionally, as an embodiment, before the network side device sends DCI, the method further includes: the network side equipment sends configuration information, wherein the configuration information comprises the configuration of N codebook subsets, and N is a positive integer; wherein the configuration of each of said codebook subsets comprises at least one of the following information: 1) A maximum transmission rank; 2) Coherence of the antenna ports; 3) A horizontal oversampling factor; 4) A vertical direction oversampling factor; 5) An antenna grouping mode; 6) An antenna polarization mode; 7) The number of antenna ports; 8) Phase set between antenna groups.

Optionally, as an embodiment, before the network side device sends the configuration information, the method further includes: the network side equipment receives terminal capability information reported by a terminal, wherein the terminal capability information comprises at least one of the following components: 1) A horizontal oversampling factor; 2) A vertical direction oversampling factor; 3) An antenna grouping mode; 4) An antenna polarization mode; 5) The number of antenna ports; 6) A set of phases between antenna groupings; 7) Antenna grouping for full power transmission; 8) Precoding information for full power transmission.

Optionally, as an embodiment, in a case that N is greater than 1, the precoding information of the full power transmission includes N groups of precoding matrices, where the N groups of precoding matrices are in one-to-one correspondence with N groups of antenna ports of the terminal; or, the precoding information of the full power transmission includes a set of precoding matrices, wherein the set of precoding matrices corresponds to N sets of antenna ports of the terminal.

Optionally, as an embodiment, the set of precoding matrices includes at least one of: 1) An 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein, the coherence of the antenna port of the terminal is incoherent; 2) An 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 4 antenna ports of the terminal are a group of coherent ports; 3) An 8-antenna port precoding matrix formed by four 2-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the terminal are a group of coherent ports; 4) An 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the terminal are a group of coherent ports; 5) A precoding matrix of 8 antenna ports is formed by using a precoding matrix of 2 antenna ports and a precoding matrix of 4 antenna ports.

Optionally, as an embodiment, the coherence of the N codebook subsets included in the configuration information is determined according to the antenna coherence and/or the full power transmission mode reported by the terminal.

Optionally, as an embodiment, the coherence of the antenna reported by the terminal is incoherent, and the coherence of the N codebook subsets included in the configuration information includes: { incoherent, incoherent }; or, the coherence of the antenna reported by the terminal is incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all partial incoherent, all partial incoherent }; or the coherence of the antenna reported by the terminal is partial coherence and incoherent, and the coherence of the N codebook subsets included in the configuration information comprises one of the following: { partially incoherent, partially incoherent }; { incoherent, incoherent }; { partially coherent, partially coherent }; { partially coherent, incoherent }; or the coherence of the antenna reported by the terminal is partial coherence and incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all of the partial incoherent, all of the partial incoherent }.

According to the indicating method of the precoding matrix, the execution body can be the indicating device of the precoding matrix. In the embodiment of the present application, an example of a method for indicating a precoding matrix performed by an indicating device for a precoding matrix is described.

Fig. 4 is a schematic structural diagram of an indicating device of a precoding matrix according to an embodiment of the present application, and the device may correspond to a terminal in other embodiments. As shown in fig. 4, the apparatus 400 includes the following modules.

A receiving module 402, configured to receive DCI, where the DCI includes a first indication field, where the first indication field is configured to indicate at least one of: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

A sending module 404, configured to determine a precoding matrix for uplink transmission according to the first indication field.

According to the indicating device for the precoding matrix, which is provided by the embodiment of the application, the network side equipment indicates the precoding matrix of uplink transmission through the first indication domain in the DCI, and specifically can indicate at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not, so that the device 400 can determine the precoding matrix of uplink transmission according to the first indication domain, which is beneficial to improving the performance of the communication system.

Optionally, as an embodiment, the DCI further includes M precoding information indication fields, where the M precoding information indication fields are used to indicate a precoding matrix used by the apparatus, and the M precoding information indication fields correspond to N codebook subsets configured by a network side device; the sending module 404 is configured to determine a precoding matrix for uplink transmission according to the first indication field and the M precoding information indication fields, where M and N are positive integers.

Optionally, as an embodiment, the receiving module 402 is further configured to receive configuration information, where the configuration information includes a configuration of N codebook subsets, and N is a positive integer; wherein the configuration of each of said codebook subsets comprises at least one of the following information: 1) A maximum transmission rank; 2) Coherence of the antenna ports; 3) A horizontal oversampling factor; 4) A vertical direction oversampling factor; 5) An antenna grouping mode; 6) An antenna polarization mode; 7) The number of antenna ports; 8) Phase set between antenna groups.

Optionally, as an embodiment, the sending module 404 is further configured to report capability information of the device, where the capability information includes at least one of the following: 1) A horizontal oversampling factor; 2) A vertical direction oversampling factor; 3) An antenna grouping mode; 4) An antenna polarization mode; 5) The number of antenna ports; 6) A set of phases between antenna groupings; 7) Antenna grouping for full power transmission; 8) Precoding information for full power transmission.

Optionally, as an embodiment, in a case where N is greater than 1, the precoding information of the full power transmission includes N sets of precoding matrices, where the N sets of precoding matrices are in one-to-one correspondence with N sets of antenna ports of the device; alternatively, the precoding information for the full power transmission includes a set of precoding matrices, wherein the set of precoding matrices corresponds to N sets of antenna ports of the device.

Optionally, as an embodiment, the set of precoding matrices includes at least one of: 1) An 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the coherence of the antenna ports of the device is incoherent; 2) An 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 4 antenna ports of the device are a set of coherent ports; 3) An 8-antenna port precoding matrix formed by four 2-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the device are a set of coherent ports; 4) An 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the device are a set of coherent ports; 5) A precoding matrix of 8 antenna ports is formed by using a precoding matrix of 2 antenna ports and a precoding matrix of 4 antenna ports.

Optionally, as an embodiment, the coherence of the N codebook subsets included in the configuration information is determined according to the antenna coherence and/or the full power transmission mode reported by the device.

Optionally, as an embodiment, the coherence of the antenna reported by the device is incoherent, and the coherence of the N codebook subsets included in the configuration information includes: { incoherent, incoherent }; or, the coherence of the antenna reported by the device is incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all partial incoherent, all partial incoherent }; or the coherence of the antenna reported by the device is partial coherence and incoherence, and the coherence of the N codebook subsets included in the configuration information comprises one of the following: { partially incoherent, partially incoherent }; { incoherent, incoherent }; { partially coherent, partially coherent }; { partially coherent, incoherent }; or the coherence of the antenna reported by the device is partial coherence and incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all of the partial incoherent, all of the partial incoherent }.

The apparatus 400 according to the embodiment of the present application may refer to the flow of the method 200 corresponding to the embodiment of the present application, and each unit/module in the apparatus 400 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 200, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

The indicating device of the precoding matrix in the embodiment of the application may be an electronic device, for example, an electronic device with an operating system, or may be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

Fig. 5 is a schematic structural diagram of an indicating device of a precoding matrix according to an embodiment of the present application, where the device may correspond to a network side device in other embodiments. As shown in fig. 5, the apparatus 500 includes the following modules.

A sending module 502, configured to send DCI, where the DCI includes a first indication field, where the first indication field is used for determining a precoding matrix of uplink transmission by a terminal, and the first indication field is used for indicating at least one of: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

Optionally, the apparatus 500 may further comprise a processing module.

The indicating device for the precoding matrix provided in the embodiment of the present application indicates, through the first indication field in the DCI, the precoding matrix of uplink transmission of the terminal, which may specifically indicate at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix and the transmission layer information of the precoding matrix, and whether full power transmission is used or not, so that the terminal can determine the precoding matrix of uplink transmission according to the first indication domain, and the performance of a communication system is improved.

Optionally, as an embodiment, the DCI further includes M precoding information indication fields, where the M precoding information indication fields are used to indicate a precoding matrix used by the terminal, and the M precoding information indication fields correspond to N codebook subsets configured by the device; m and N are positive integers.

Optionally, as an embodiment, the sending module 502 is further configured to send configuration information, where the configuration information includes a configuration of N codebook subsets, and N is a positive integer; wherein the configuration of each of said codebook subsets comprises at least one of the following information: 1) A maximum transmission rank; 2) Coherence of the antenna ports; 3) A horizontal oversampling factor; 4) A vertical direction oversampling factor; 5) An antenna grouping mode; 6) An antenna polarization mode; 7) The number of antenna ports; 8) Phase set between antenna groups.

Optionally, as an embodiment, the apparatus further includes a receiving module, configured to receive terminal capability information reported by a terminal, where the terminal capability information includes at least one of the following: 1) A horizontal oversampling factor; 2) A vertical direction oversampling factor; 3) An antenna grouping mode; 4) An antenna polarization mode; 5) The number of antenna ports; 6) A set of phases between antenna groupings; 7) Antenna grouping for full power transmission; 8) Precoding information for full power transmission.

The apparatus 500 according to the embodiment of the present application may refer to the flow of the method 300 corresponding to the embodiment of the present application, and each unit/module in the apparatus 500 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 300, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

The indicating device for the precoding matrix provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 2 to 3, and achieve the same technical effects, so that repetition is avoided, and no redundant description is provided herein.

Optionally, as shown in fig. 6, the embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, where the memory 602 stores a program or an instruction that can be executed on the processor 601, for example, when the communication device 600 is a terminal, the program or the instruction implements each step of the foregoing precoding matrix indication method embodiment when executed by the processor 601, and the same technical effects can be achieved. When the communication device 600 is a network side device, the program or the instruction implements the steps of the foregoing method embodiment for indicating a precoding matrix when executed by the processor 601, and the same technical effects can be achieved, so that repetition is avoided and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for receiving DCI, the DCI comprises a first indication domain, and the first indication domain is used for indicating at least one of the following: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not; and determining a precoding matrix of uplink transmission according to the first indication domain. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 7 is a schematic hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 700 includes, but is not limited to: at least some of the components of the radio frequency unit 701, the network module 702, the audio output unit 703, the input unit 704, the sensor 705, the display unit 706, the user input unit 707, the interface unit 708, the memory 709, and the processor 710.

Those skilled in the art will appreciate that the terminal 700 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 710 via a power management system so as to perform functions such as managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 7 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, with the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts, a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from the network side device, the radio frequency unit 701 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network side device. Typically, the radio unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 709 may be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 709 may include volatile memory or nonvolatile memory, or the memory 709 may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 709 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

The radio frequency unit 701 may be configured to receive DCI, where the DCI includes a first indication field, where the first indication field is configured to indicate at least one of: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not; and determining a precoding matrix of uplink transmission according to the first indication domain.

According to the terminal provided by the embodiment of the application, the network side equipment indicates the precoding matrix of the uplink transmission of the terminal through the first indication domain in the DCI, and specifically can indicate at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix and the transmission layer information of the precoding matrix, and whether full power transmission is used or not, so that the terminal can determine the precoding matrix of uplink transmission according to the first indication domain, and the performance of a communication system is improved.

The terminal 700 provided in this embodiment of the present application may further implement each process of the foregoing embodiment of the method for indicating a precoding matrix, and may achieve the same technical effects, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the communication interface is used for sending DCI, the DCI comprises a first indication domain, the first indication domain is used for determining a precoding matrix of uplink transmission by a terminal, and the first indication domain is used for indicating at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 8, the network side device 800 includes: an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected to a radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information via the antenna 81, and transmits the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes information to be transmitted, and transmits the processed information to the radio frequency device 82, and the radio frequency device 82 processes the received information and transmits the processed information through the antenna 81.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 83, and the baseband apparatus 83 includes a baseband processor.

The baseband device 83 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 8, where one chip, for example, a baseband processor, is connected to the memory 85 through a bus interface, so as to call a program in the memory 85 to perform the network device operation shown in the above method embodiment.

The network-side device may also include a network interface 86, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 800 of the embodiment of the present invention further includes: instructions or programs stored in the memory 85 and executable on the processor 84, the processor 84 invokes the instructions or programs in the memory 85 to perform the method performed by the modules shown in fig. 5, and achieve the same technical effects, and are not repeated here.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the processes of the foregoing embodiments of the method for indicating a precoding matrix are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is configured to run a program or an instruction, implement each process of the foregoing precoding matrix indicating method embodiment, and achieve the same technical effect, so as to avoid repetition, and not be repeated here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the foregoing precoding matrix indicating method embodiment, and achieve the same technical effects, so that repetition is avoided, and details are not repeated herein.

The embodiment of the application also provides an indicating system of the precoding matrix, which comprises: the terminal can be used for executing the step of the indicating method of the precoding matrix, and the network side equipment can be used for executing the step of the indicating method of the precoding matrix.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. An indication method of a precoding matrix, comprising:

the terminal receives Downlink Control Information (DCI), wherein the DCI comprises a first indication domain, and the first indication domain is used for indicating at least one of the following: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not;

and the terminal determines a precoding matrix of uplink transmission according to the first indication domain.

2. The method of claim 1, wherein the DCI further comprises M precoding information indication fields, the M precoding information indication fields being used to indicate a precoding matrix used by the terminal, the M precoding information indication fields corresponding to N codebook subsets configured by a network side device;

the determining, by the terminal, a precoding matrix for uplink transmission according to the first indication field includes: and the terminal determines a precoding matrix of uplink transmission according to the first indication domain and the M precoding information indication domains, wherein M and N are positive integers.

3. The method of claim 2, wherein the bit length of the first indication field is related to at least one of: the number N of codebook subsets configured by the network side equipment; the precoding information included in the DCI indicates the number M of fields.

4. The method of claim 1, wherein the precoding matrix generation scheme comprises: a precoding matrix is generated based on the at least two precoding matrices.

5. The method of any one of claims 1 to 4, wherein prior to the terminal receiving DCI, the method further comprises:

the terminal receives configuration information, wherein the configuration information comprises the configuration of N codebook subsets, and N is a positive integer; wherein the configuration of each of said codebook subsets comprises at least one of the following information:

a maximum transmission rank;

coherence of the antenna ports;

a horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

phase set between antenna groups.

6. The method of claim 5, wherein the terminal is configured with transmissions for 8 antenna ports; where n=1, 2 or 4.

7. The method of claim 5, wherein the configuration information further comprises information indicating a full power transmission mode.

8. The method of claim 5, wherein prior to the terminal receiving the configuration information, the method further comprises: the terminal reports terminal capability information, wherein the terminal capability information comprises at least one of the following components:

A horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

a set of phases between antenna groupings;

antenna grouping for full power transmission;

precoding information for full power transmission.

9. The method of claim 8, wherein, in the case where N is greater than 1,

the precoding information of the full power transmission comprises N groups of precoding matrixes, wherein the N groups of precoding matrixes are in one-to-one correspondence with N groups of antenna ports of the terminal; or,

the precoding information of the full power transmission comprises a set of precoding matrixes, wherein the set of precoding matrixes correspond to N groups of antenna ports of the terminal.

10. The method of claim 9, wherein the set of precoding matrices comprises at least one of:

an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein, the coherence of the antenna port of the terminal is incoherent;

an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 4 antenna ports of the terminal are a group of coherent ports;

An 8-antenna port precoding matrix formed by four 2-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the terminal are a group of coherent ports;

an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the terminal are a group of coherent ports;

a precoding matrix of 8 antenna ports is formed by using a precoding matrix of 2 antenna ports and a precoding matrix of 4 antenna ports.

11. The method of claim 5, wherein the coherence of the N codebook subsets is determined based on antenna coherence and/or full power transmission mode reported by the terminal.

12. The method of claim 11, wherein the step of determining the position of the probe is performed,

the coherence of the antenna reported by the terminal is incoherent, and the coherence of the N codebook subsets included in the configuration information comprises: { incoherent, incoherent }; or,

the coherence of the antenna reported by the terminal is incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all partial incoherent, all partial incoherent }; or,

the coherence of the antenna reported by the terminal is partial coherence and incoherent, and the coherence of the N codebook subsets included in the configuration information comprises one of the following: { partially incoherent, partially incoherent }; { incoherent, incoherent }; { partially coherent, partially coherent }; { partially coherent, incoherent }; or,

The coherence of the antenna reported by the terminal is partial coherence and incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all of the partial incoherent, all of the partial incoherent }.

13. An indication method of a precoding matrix, comprising:

the network side equipment sends DCI, wherein the DCI comprises a first indication domain, the first indication domain is used for determining a precoding matrix of uplink transmission by a terminal, and the first indication domain is used for indicating at least one of the following: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

14. The method of claim 13, wherein the DCI further comprises M precoding information indication fields, the M precoding information indication fields being used to indicate a precoding matrix used by the terminal, the M precoding information indication fields corresponding to N codebook subsets configured by a network side device; m and N are positive integers.

15. The method according to claim 13 or 14, wherein before the network side device transmits DCI, the method further comprises: the network side equipment sends configuration information, wherein the configuration information comprises the configuration of N codebook subsets, and N is a positive integer; wherein the configuration of each of said codebook subsets comprises at least one of the following information:

A maximum transmission rank;

coherence of the antenna ports;

a horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

phase set between antenna groups.

16. The method of claim 15, wherein before the network side device sends the configuration information, the method further comprises: the network side equipment receives terminal capability information reported by a terminal, wherein the terminal capability information comprises at least one of the following components:

a horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

a set of phases between antenna groupings;

antenna grouping for full power transmission;

precoding information for full power transmission.

17. The method of claim 16, wherein, in the case where N is greater than 1,

18. The method of claim 17, wherein the set of precoding matrices comprises at least one of:

19. The method according to claim 15, wherein the configuration information comprises a coherence of the N codebook subsets determined from an antenna coherence and/or a full power transmission mode reported by the terminal.

20. The method of claim 19, wherein the step of determining the position of the probe comprises,

21. An indicating device for a precoding matrix, comprising:

a receiving module, configured to receive DCI, where the DCI includes a first indication field, where the first indication field is configured to indicate at least one of: the method comprises the steps of generating a precoding matrix, selecting information of antenna ports, effective precoding matrix information, and transmitting layer information of the precoding matrix, and judging whether full power transmission is used or not;

And the sending module is used for determining a precoding matrix of uplink transmission according to the first indication domain.

22. The apparatus of claim 21, wherein the DCI further comprises M precoding information indication fields, the M precoding information indication fields being used to indicate a precoding matrix used by the apparatus, the M precoding information indication fields corresponding to N codebook subsets configured by a network side device;

the sending module is configured to determine a precoding matrix for uplink transmission according to the first indication field and the M precoding information indication fields, where M and N are positive integers.

23. The apparatus according to claim 21 or 22, wherein the receiving module is further configured to receive configuration information, the configuration information including a configuration of N codebook subsets, N being a positive integer; wherein the configuration of each of said codebook subsets comprises at least one of the following information:

a maximum transmission rank;

coherence of the antenna ports;

a horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

phase set between antenna groups.

24. The apparatus of claim 23, wherein the sending module is further configured to report capability information of the apparatus, the capability information including at least one of:

A horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

a set of phases between antenna groupings;

antenna grouping for full power transmission;

precoding information for full power transmission.

25. The apparatus of claim 24, wherein, in the case where N is greater than 1,

the precoding information of the full power transmission comprises N groups of precoding matrixes, wherein the N groups of precoding matrixes are in one-to-one correspondence with N groups of antenna ports of the device; or,

the precoding information for the full power transmission includes a set of precoding matrices, wherein the set of precoding matrices corresponds to N sets of antenna ports of the device.

26. The apparatus of claim 25, wherein the set of precoding matrices comprises at least one of:

an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the coherence of the antenna ports of the device is incoherent;

an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 4 antenna ports of the device are a set of coherent ports;

An 8-antenna port precoding matrix formed by four 2-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the device are a set of coherent ports;

an 8-antenna port precoding matrix formed by two 4-antenna port precoding matrices is adopted; wherein the 2 antenna ports of the device are a set of coherent ports;

27. The apparatus of claim 23, wherein the configuration information comprises a coherence of a subset of N codebooks determined based on antenna coherence and/or full power transmission mode reported by the apparatus.

28. The apparatus of claim 27, wherein the device comprises a plurality of sensors,

the coherence of the antenna reported by the device is incoherent, and the coherence of the N codebook subsets included in the configuration information comprises: { incoherent, incoherent }; or,

the coherence of the antenna reported by the device is incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all partial incoherent, all partial incoherent }; or,

The coherence of the antenna reported by the device is partial coherence and incoherent, and the coherence of the N codebook subsets included in the configuration information comprises one of the following: { partially incoherent, partially incoherent }; { incoherent, incoherent }; { partially coherent, partially coherent }; { partially coherent, incoherent }; or,

the coherence of the antenna reported by the device is partial coherence and incoherent, the reported full power transmission mode is mode one, and the coherence of the N codebook subsets included in the configuration information comprises: { all of the partial incoherent, all of the partial incoherent }.

29. An indicating device for a precoding matrix, comprising:

a sending module, configured to send DCI, where the DCI includes a first indication field, where the first indication field is used for determining a precoding matrix of uplink transmission by a terminal, and the first indication field is used for indicating at least one of: the precoding matrix generation mode, the information of the selected antenna port, the information of the effective precoding matrix, the information of the transmission layer of the precoding matrix, and whether full power transmission is used or not.

30. The apparatus of claim 29, wherein the DCI further comprises M precoding information indication fields for indicating a precoding matrix used by the terminal, the M precoding information indication fields corresponding to N codebook subsets configured by the apparatus; m and N are positive integers.

31. The apparatus according to claim 29 or 30, wherein the transmitting module is further configured to transmit configuration information, the configuration information including a configuration of N codebook subsets, N being a positive integer; wherein the configuration of each of said codebook subsets comprises at least one of the following information:

a maximum transmission rank;

coherence of the antenna ports;

a horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

phase set between antenna groups.

32. The apparatus of claim 31, further comprising a receiving module configured to receive terminal capability information reported by a terminal, where the terminal capability information includes at least one of:

a horizontal oversampling factor;

a vertical direction oversampling factor;

an antenna grouping mode;

an antenna polarization mode;

the number of antenna ports;

a set of phases between antenna groupings;

antenna grouping for full power transmission;

precoding information for full power transmission.

33. The apparatus of claim 32, wherein, in the case where N is greater than 1,

34. The apparatus of claim 33, wherein the set of precoding matrices comprises at least one of:

35. The apparatus of claim 31, wherein the configuration information comprises a coherence of a subset of N codebooks determined based on antenna coherence and/or full power transmission mode reported by the terminal.

36. The apparatus of claim 35, wherein the device comprises a plurality of sensors,

37. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the method of any one of claims 1 to 12.

38. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method of any of claims 13 to 20.

39. A readable storage medium, characterized in that it stores thereon a program or instructions, which when executed by a processor, implement the steps of the method according to any of claims 1 to 20.