CN115834004A

CN115834004A - Method and device for indicating precoding information

Info

Publication number: CN115834004A
Application number: CN202111088039.XA
Authority: CN
Inventors: 塔玛拉卡·拉盖施
Original assignee: Vivo Software Technology Co Ltd
Current assignee: Vivo Software Technology Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2023-03-21

Abstract

The embodiment of the application discloses a method and equipment for indicating precoding information, and belongs to the technical field of communication. The method for indicating the precoding information in the embodiment of the application comprises the following steps: the method comprises the steps that network side equipment obtains channel information, wherein the channel information comprises first precoding information of a plurality of sub-bands; the network side equipment compresses the first pre-coding information by using a DFT vector to obtain second pre-coding information; and the network side equipment sends indication information, wherein the indication information is used for indicating the second precoding information and a transmission rank corresponding to the second precoding information.

Description

Method and device for indicating precoding information

Technical Field

The application belongs to the technical field of communication, and particularly relates to a method and equipment for indicating precoding information.

Background

When scheduling a Physical Uplink Shared Channel (PUSCH), the network side device may indicate Precoding Information in Downlink Control Information (DCI), where the Precoding Information may be a Transmitted Precoding Matrix Indicator (TPMI) or the like.

In the related art, only the wideband precoding information indication is supported, that is, one piece of precoding information indicated when the network side device schedules the PUSCH corresponds to the scheduled PUSCH resources in all frequency domains. When the terminal sends the PUSCH, the terminal sends the PUSCH after precoding the PUSCH resources on all scheduled frequency domains by adopting one piece of precoding information indicated by the network side equipment.

To support PUSCH for subband precoding, the network side device may indicate precoding information for each subband in signaling. However, the number of sub-bands is large, which results in large signaling overhead.

Disclosure of Invention

The embodiment of the application provides a method and equipment for indicating precoding information, which can solve the problem of high signaling overhead caused by the fact that network side equipment needs to indicate precoding information of a plurality of sub-bands.

In a first aspect, a method for indicating precoding information is provided, including: the method comprises the steps that network side equipment obtains channel information, wherein the channel information comprises first precoding information of a plurality of sub-bands; the network side equipment compresses the first precoding information by using a DFT vector to obtain second precoding information; and the network side equipment sends indication information, wherein the indication information is used for indicating the second precoding information and a transmission rank corresponding to the second precoding information.

In a second aspect, a method for indicating precoding information is provided, including: a terminal receives indication information, wherein the indication information is used for indicating second precoding information and a transmission rank corresponding to the second precoding information; and the terminal decompresses the second precoding information by using the DFT vector to obtain first precoding information, wherein the first precoding information comprises precoding information of a plurality of sub-bands.

In a third aspect, an apparatus for indicating precoding information is provided, including: an obtaining module, configured to obtain channel information, where the channel information includes first precoding information of multiple subbands; the compression module is used for compressing the first precoding information by using a DFT vector to obtain second precoding information; a sending module, configured to send indication information, where the indication information is used to indicate the second precoding information and a transmission rank corresponding to the second precoding information.

In a fourth aspect, an apparatus for indicating precoding information is provided, including: a receiving module, configured to receive indication information, where the indication information is used to indicate second precoding information and a transmission rank corresponding to the second precoding information; and the decompression module is used for decompressing the second precoding information by using the DFT vector to obtain first precoding information, wherein the first precoding information comprises precoding information of a plurality of sub-bands.

In a fifth aspect, there is provided a terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implements the method according to the second aspect.

A sixth aspect provides a terminal, including a processor and a communication interface, where the processor is configured to decompress the second precoding information using a DFT vector to obtain first precoding information, the first precoding information includes precoding information of multiple subbands, and the communication interface is configured to receive indication information, where the indication information is used to indicate the second precoding information and a transmission rank corresponding to the second precoding information.

In a seventh aspect, a network-side device is provided, which includes a processor, a memory, and a program or an instruction stored on the memory and executable on the processor, and when executed by the processor, the program or the instruction implements the method according to the first aspect.

In an eighth aspect, a network side device is provided, which includes a processor and a communication interface, where the processor is configured to obtain channel information, and the channel information includes first precoding information of multiple sub-bands; and compressing the first precoding information by using a DFT vector to obtain second precoding information, wherein the communication interface is used for sending indication information, and the indication information is used for indicating the second precoding information and a transmission rank corresponding to the second precoding information.

In a ninth aspect, there is provided a readable storage medium on which is stored a program or instructions which, when executed by a processor, carries out the method of the first aspect or the method of the second aspect.

In a tenth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the method according to the first aspect, or to implement the method according to the second aspect.

In an eleventh aspect, there is provided a computer program/program product stored in a non-transitory storage medium, the program/program product being executable by at least one processor to implement a method as described in the first aspect, or to implement a method as described in the second aspect.

In the embodiment of the application, the network side device compresses the first precoding information corresponding to the multiple sub-bands by using the DFT vector to obtain the second precoding information, and indicates the second precoding information and the transmission rank to the terminal, so that the terminal can perform uplink transmission of the multiple sub-bands according to the second precoding information and the transmission rank.

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 an indication method of precoding information according to an embodiment of the application;

fig. 3 is a schematic flow chart of an indication method of precoding information according to an embodiment of the application;

fig. 4 is a schematic structural diagram of an apparatus for indicating precoding information according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an apparatus for indicating precoding information 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 diagram 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

The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements 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 other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" used herein generally refer to a class and do not limit the number of objects, for example, a first object can be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and, using NR terminology in much of the description below, the techniques may also be applied to applications other than NR system applications, such as generation 6 (6) systems ^th Generation, 6G) communication system.

Fig. 1 shows a schematic 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-side device 12. Wherein, the terminal 11 may also be referred to as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palm Computer, a netbook, a super Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (Wearable Device), a vehicle mounted Device (VUE), a pedestrian terminal (PUE), a smart home (a Device with wireless communication function, such as a refrigerator, a television, a washing machine, or furniture, etc.), and the Wearable Device includes: smart watch, smart bracelet, smart earphone, smart glasses, smart jewelry (smart bracelet, smart ring, smart necklace, smart anklet, etc.), smart wristband, smart garment, game console, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, wherein the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a next generation node B (gNB), a home node B, a home evolved node B (hbo), a WLAN access Point, a WiFi node, a Transmission Receiving Point (TRP), or some other suitable term in the field, as 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 the Base Station in the NR system is taken as an example, but the specific type of the Base Station is not limited.

The following describes in detail a method and an apparatus for indicating precoding information provided by embodiments of the present application through some embodiments and application scenarios thereof with reference to the accompanying drawings.

As shown in fig. 2, an embodiment of the present application provides an indication method 200 of precoding information, which may be performed by a network side device, in other words, the method may be performed by software or hardware installed in the network side device, and the method includes the following steps.

S202: the method comprises the steps that a network side device obtains channel information, wherein the channel information comprises first precoding information of a plurality of sub-bands.

Before the embodiment is executed, the network side device may receive a Sounding Reference Signal (SRS) sent by the terminal. In this step, the network side device may obtain channel information according to a precoding granularity and an SRS sent by the terminal, where the precoding granularity may be multiple Physical Resource Blocks (PRBs).

For example, the SRS is transmitted by the terminal in the full bandwidth, occupies 100 PRBs, and if the precoding granularity is 5 PRBs, there are 20 subbands, and the network side device can obtain the first precoding information corresponding to each of part of or all of the 20 subbands.

One way for the network side device to obtain the channel information is listed above, and it can be understood that the network side device may also obtain the channel information through other ways. For example, the network side device receives channel information sent by the terminal, where the terminal may measure a channel to obtain information.

In this embodiment, the channel information acquired by the network side device may include first precoding information corresponding to a plurality of sub-bands, for example, the channel information includes first precoding information 1 corresponding to sub-band 1, first precoding information 2 corresponding to sub-band 2, first precoding information 3 corresponding to sub-band 3, and the like.

It should be noted that, second precoding information is also mentioned subsequently, where "first" and "second" are only used to distinguish precoding information before and after compression, and do not represent other specific meanings; the first precoding information is precoding information before compression, and the second precoding information is precoding information after compression.

S204: and the network side equipment compresses the first precoding information by using the DFT vector to obtain second precoding information.

Optionally, before S204, the network side device may further determine a DFT vector length, and determine the DFT vector according to the determined DFT vector length.

For example, if the DFT vector length determined by the network side device is 20, the network side device may obtain 20 DFT vectors according to the predefined correspondence. Before the embodiment is executed, a plurality of DFT vector lengths and a DFT vector corresponding to each DFT vector length are predefined, so that the network side device and the terminal can obtain the DFT vector corresponding to the DFT vector length after obtaining the DFT vector length.

While one way for the network side device to obtain the DFT vector is listed above, it can be understood that the network side device may also obtain the DFT vector through other ways.

Alternatively, the above-mentioned network side device determining the DFT vector length may include one of the following.

1) And the network side equipment determines the DFT vector length according to the SRS bandwidth configuration and the precoding granularity.

The precoding granularity may be determined by the network side device. For example, the SRS bandwidth configuration is 100 PRBs, the network side device determines the precoding granularity is 5 PRBs, and determines the DFT vector length is 20, and the DFT vector length may be equal to the number of subbands.

2) The network side device determines the DFT vector length according to the frequency domain resource of a scheduled Physical Uplink Shared Channel (PUSCH) and the precoding granularity.

The precoding granularity may be determined by the network side device. For example, the PUSCH scheduled by the network side device occupies 100 PRBs in the frequency domain, and the precoding granularity determined by the network side device is 5 PRBs, it is determined that the DFT vector length is 20, and the DFT vector length may be equal to the number of subbands.

3) And the network side equipment determines the pre-coding granularity according to the frequency domain resource of the scheduled PUSCH, and determines the DFT vector length according to the determined pre-coding granularity.

The example is applicable to the case that the frequency domain resource of the scheduled PUSCH is small, in which case, the network side device may re-determine the precoding granularity according to the frequency domain resource of the scheduled PUSCH to increase the number of subbands. For example, the PUSCH scheduled by the network side device occupies 60 PRBs in the frequency domain, the default precoding granularity is 5 PRBs, and the precoding granularity re-determined by the network side device according to the frequency domain resource of the scheduled PUSCH is 4 PRBs, so both the determined number of subbands and the DFT vector length may be 15.

S206: and the network side equipment sends indication information, wherein the indication information is used for indicating the second precoding information and a transmission rank corresponding to the second precoding information.

In an example, the indication Information sent by the network side device may be both the second precoding Information and the transmission rank, and the indication Information may be carried by Downlink Control Information (DCI), and in this example, since the second precoding Information is obtained after compression, the data amount is smaller than that of the first precoding Information, which is beneficial to reducing overhead of DCI signaling.

In another example, the indication information sent by the network side device may be second precoding information + an index corresponding to the transmission rank, and the like, where specific content that the second precoding information + the transmission rank may occur may be indicated in advance by the network side device through a configuration signaling and the like, where the configuration signaling may be Radio Resource Control (RRC) signaling and the like, and in this example, since the second precoding information is obtained after being compressed, a data amount is smaller than that of the first precoding information, which is beneficial to reducing overhead of the configuration signaling (such as RRC signaling).

This example indicates the second precoding information + transmission rank by an index, not the direct second precoding information + transmission rank itself, so that the terminal can determine the transmission rank and the second precoding information according to the indicated index, and the second precoding information may include the DFT index and number, the start number, and the like corresponding to each transmission layer.

For the terminal, the terminal may also determine the DFT vector length by using the same determination method as that used by the network side device, determine the DFT vector according to the determined DFT vector length, and decompress the second precoding information according to the determined DFT vector to obtain the first precoding information corresponding to each of the multiple sub-bands.

Subsequently, the terminal may also perform precoding processing on uplink data to be sent by using the first precoding information + transmission rank, and send the uplink data through multiple subbands, where the uplink data may be carried by a PUSCH. For example, the terminal performs precoding processing on the uplink data to be sent on the sub-band 1 by using the first precoding information 1 corresponding to the sub-band 1, performs precoding processing on the uplink data to be sent on the sub-band 2 by using the first precoding information 2 corresponding to the sub-band 2, and so on.

According to the precoding information indication method provided by the embodiment of the application, the network side equipment compresses the first precoding information corresponding to the multiple sub-bands by using the DFT vector to obtain the second precoding information, and indicates the second precoding information and the transmission rank to the terminal, so that the terminal can perform multi-sub-band uplink transmission according to the second precoding information and the transmission rank, and because the second precoding information is obtained after compression, the data volume is smaller compared with the first precoding information, and the signaling notification overhead of the network side equipment is reduced.

Meanwhile, the signaling notification cost is reduced, and the designed signaling format is relatively simple under the condition that the total cost of the first precoding information is not changed, so that the signaling notification cost is further reduced.

Optionally, the indication information mentioned in the foregoing embodiments includes first level indication information and second level indication information; wherein the first-stage indication information is used for indicating the transmission rank and first information in the second precoding information; the second-level indication information is used for indicating second information in the second precoding information.

Optionally, the transmission rank and the first information are jointly encoded to indicate.

In this embodiment, the first level indication information and the second level indication information may be carried by different signaling, for example, the first level indication information is carried by a first DCI, and the second level indication information is carried by a second DCI. Or, the first level indication information and the second level indication information may also be carried by the same signaling, and the terminal may decode to obtain the first level indication information first, and decode to obtain the second level indication information based on the first level indication information.

The embodiment can reduce the signaling overhead of the indication of the precoding information of the uplink sub-band, and under two-stage signaling indication, the overhead of the first-stage indication information is small, the specific bit number of the second-stage indication information can be determined, and the method can support more precoding sub-bands but can effectively control the signaling overhead.

It is to be understood that, in other embodiments, the indication information is not limited to two levels, and may be more, for example, a third level of indication information is added, where the first level of indication information is used to indicate the transmission rank and the first information in the second precoding information; the second-level indication information is used for indicating a part of second information in the second precoding information; the third-stage indication information is used for indicating another part of the second information in the second precoding information.

The aforementioned first information may include at least one of: DFT index, DFT index number, starting DFT index number, DFT window length and starting position of DFT window.

In one example, the first information includes the DFT window length and a starting position of the DFT window; wherein the DFT window length and the starting position of the DFT window are common to multiple transmission layers; or, the first information indicates the DFT window length and the start position of the DFT window for each transmission layer, respectively.

This example is applied to the case where the DFT window length is long, and in other embodiments, when the DFT window length is a fixed value, it is not necessary to indicate the DFT window length and it is only necessary to indicate the start position of the DFT window.

The aforementioned second information includes at least one of: DFT index, amplitude corresponding to DFT index, and phase corresponding to DFT index.

In one example, the second information includes an amplitude corresponding to the DFT index and a phase corresponding to the DFT index; wherein, the amplitude and phase corresponding to different DFT indexes are indicated independently.

In order to describe the method for indicating precoding information provided in the embodiments of the present application in detail, several specific table embodiments will be described below. Tables 1 to 5 mainly list the contents of the compressed second pre-coding information, which specifically correspond to the contents indicated by the first-level indication information in the previous embodiment.

Example one

This example can be seen in table 1.

TABLE 1

In this embodiment, the specific precoding information (i.e. the second precoding information, and the following similarities) may indicate the following: [ index ], [ DFT index 1], [ DFT index 2], [ DFT index 3], [ DFT index 4], [ amplitude and phase corresponding to DFT index 1], [ amplitude and phase corresponding to DFT index 2], [ amplitude and phase corresponding to DFT index 3], [ amplitude and phase corresponding to DFT index 4 ].

As in table 1 above, there are 8 DFT vectors, amplitude quantization is 3 bits, and phase quantization is 2 bits, so the total precoding information is: the total number of 35 bits are [ index, 3 bits ], [ DFT index 1,3 bits ], [ DFT index 2,3 bits ], [ DFT index 3,3 bits ], [ DFT index 4,3 bits ], [ amplitude and phase corresponding to DFT index 1, 3+2 bits ], [ amplitude and phase corresponding to DFT index 2, 3+2 bits ], [ amplitude and phase corresponding to DFT index 3, 3+2 bits ], [ amplitude and phase corresponding to DFT index 4, and 3+2 bits ].

Example two

This example can be seen in table 2.

TABLE 2

In this embodiment, the specific precoding information may indicate the following: [ index ], [ DFT index 1], [ DFT index 2], [ amplitude and phase corresponding to DFT index 1], [ amplitude and phase corresponding to DFT index 2 ].

As in table 2 above, there are 8 DFT vectors, amplitude quantization is 3 bits, and phase quantization is 2 bits, so the total precoding information is: [ index, 3 bits ], [ DFT index 1,3 bits ], [ DFT index 2,3 bits ], [ amplitude and phase corresponding to DFT index 1, 3+2 bits ], [ amplitude and phase corresponding to DFT index 2, 3+2 bits ], and 19 bits in total.

EXAMPLE III

This example can be seen in table 3.

TABLE 3

In this embodiment, the specific precoding information may indicate the following: [ index ], [ window length ], [ start number ], [ DFT index 1], [ DFT index 2], [ DFT index 3], [ DFT index 4], [ amplitude and phase corresponding to DFT index 1], [ amplitude and phase corresponding to DFT index 2], [ amplitude and phase corresponding to DFT index 3], [ amplitude and phase corresponding to DFT index 4 ].

As in table 3 above, for example, the window length is 8 (4 choices, or fixed window length), the maximum window length is 16, the amplitude is quantized to 3 bits, and the phase is quantized to 2 bits, so that the total precoding information is: [ index, 3 bits ], [ window length, 2] (window length does not need these 2 bits when fixed), [ start number, 4 bits ], [ DFT index 1,3 bits ], [ DFT index 2,3 bits ], [ DFT index 3,3 bits ], [ DFT index 4,3 bits ], [ DFT index 1 corresponding amplitude and phase, 3+2 bits ], [ DFT index 2 corresponding amplitude and phase, 3+2 bits ], [ DFT index 3 corresponding amplitude and phase, 3+2 bits ], [ DFT index 4 corresponding amplitude and phase, 3+2 bits ], and 41 (or 39) bits in total.

Example four

This example can be seen in table 4.

TABLE 4

In this embodiment, the specific precoding information may indicate the following: [ index ], [ start number 1], [ start number 2], [ DFT index 1], [ DFT index 2], [ DFT index 3], [ DFT index 4], [ amplitude and phase corresponding to DFT index 1], [ amplitude and phase corresponding to DFT index 2], [ amplitude and phase corresponding to DFT index 3], [ amplitude and phase corresponding to DFT index 4 ].

As shown in table 4, the window length is a fixed window length of 8, the maximum window length is 16, the amplitude is quantized to 3 bits, and the phase is quantized to 2 bits, so that the total precoding information is: [ index, 3 bits ], [ start number 1,4 bits ], [ start number 2,4 bits ], [ DFT index 1,3 bits ], [ DFT index 2,3 bits ], [ DFT index 3,3 bits ], [ DFT index 4,3 bits ], [ amplitude and phase corresponding to DFT index 1, 3+2 bits ], [ amplitude and phase corresponding to DFT index 2, 3+2 bits ], [ amplitude and phase corresponding to DFT index 3, 3+2 bits ], [ amplitude and phase corresponding to DFT index 4, 3+2 bits ], and 43 bits in total.

EXAMPLE five

This example can be seen in table 5.

TABLE 5

In this embodiment, the specific precoding information may indicate the following: [ index ], [ start number 1], [ start number 2], [ DFT index 1], [ DFT index 2], [ amplitude and phase corresponding to DFT index 1], [ amplitude and phase corresponding to DFT index 2 ].

As shown in table 5, the window length is a fixed window length of 8, the maximum window length is 16, the amplitude is quantized to 3 bits, and the phase is quantized to 2 bits, so that the total precoding information is: the total number of bits is 27 bits for [ index, 3 bits ], [ start number 1,4 bits ], [ start number 2,4 bits ], [ DFT index 1,3 bits ], [ DFT index 2,3 bits ], [ amplitude and phase corresponding to DFT index 1, 3+2 bits ], [ amplitude and phase corresponding to DFT index 2, 3+2 bits ].

The method for indicating precoding information according to the embodiment of the present application is described in detail above with reference to fig. 2. A method for indicating precoding information according to another embodiment of the present application will be described in detail below with reference to fig. 3. It is to be understood that the interaction between the network-side device and the terminal described from the terminal side is the same as that described for the network-side device in the method shown in fig. 2, and the related description is appropriately omitted to avoid redundancy.

Fig. 3 is a schematic flow chart of an implementation of a method for indicating precoding information according to an embodiment of the present application, and the method can be applied to a terminal. As shown in fig. 3, the method 300 includes the following steps.

S302: and the terminal receives indication information, wherein the indication information is used for indicating second precoding information and a transmission rank corresponding to the second precoding information.

S304: and the terminal decompresses the second precoding information by using the DFT vector to obtain first precoding information, wherein the first precoding information comprises precoding information of a plurality of sub-bands.

Optionally, after S304, the terminal may further perform precoding processing on uplink data to be sent by using the transmission rank and the first precoding information, and send the uplink data through a plurality of subbands, where the uplink data may be carried by a PUSCH.

According to the method for indicating precoding information provided by the embodiment of the application, the second precoding information can be obtained by compressing the first precoding information corresponding to the multiple sub-bands by using the DFT vector through the network side equipment, and because the second precoding information is obtained after compression, the data volume is smaller compared with the first precoding information, and the signaling notification overhead of the network side equipment is reduced.

Optionally, as an embodiment, the indication information includes first level indication information and second level indication information; wherein the first-stage indication information is used for indicating the transmission rank and first information in the second precoding information; the second-level indication information is used for indicating second information in the second precoding information.

Optionally, as an embodiment, the transmission rank and the first information are indicated by joint coding.

Optionally, as an embodiment, the first information includes at least one of: DFT index, DFT index number, starting DFT index number, DFT window length and starting position of DFT window.

Optionally, as an embodiment, the first information includes the DFT window length and a start position of the DFT window; wherein the DFT window length and the starting position of the DFT window are common to multiple transmission layers; or, the first information indicates the DFT window length and the start position of the DFT window for each transmission layer, respectively.

Optionally, as an embodiment, the second information includes at least one of: DFT index, amplitude corresponding to DFT index, and phase corresponding to DFT index.

Optionally, as an embodiment, the second information includes an amplitude corresponding to the DFT index and a phase corresponding to the DFT index; wherein, the amplitude and phase corresponding to different DFT indexes are indicated independently.

Optionally, as an embodiment, before the terminal decompresses the second precoding information by using a DFT vector to obtain the first precoding information, the method further includes: the terminal determines the DFT vector length; and the terminal determines the DFT vector according to the DFT vector length.

Optionally, as an embodiment, the determining, by the terminal, the DFT vector length includes one of: 1) The terminal determines the DFT vector length according to the SRS bandwidth configuration and the precoding granularity; 2) The terminal determines the DFT vector length according to the scheduled frequency domain resource of the PUSCH and the pre-coding granularity; and 3) the terminal determines the pre-coding granularity according to the frequency domain resource of the scheduled PUSCH, and determines the DFT vector length according to the determined pre-coding granularity.

It should be noted that, in the method for indicating precoding information provided in the embodiment of the present application, the execution main body may be an indication device of precoding information, or a control module in the indication device of precoding information, configured to execute the method for indicating precoding information. In the embodiment of the present application, a method for indicating precoding information by an indicating apparatus of precoding information is taken as an example, and the indicating apparatus of precoding information provided in the embodiment of the present application is described.

Fig. 4 is a schematic structural diagram of an apparatus for indicating precoding information according to an embodiment of the present application, and the apparatus 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 indication information, where the indication information is used to indicate second precoding information and a transmission rank corresponding to the second precoding information.

A decompression module 404, configured to decompress the second precoding information using the DFT vector to obtain first precoding information, where the first precoding information includes precoding information of multiple subbands.

According to the apparatus for indicating precoding information provided in the embodiment of the application, the second precoding information may be obtained by compressing the first precoding information corresponding to the multiple subbands by using a DFT vector by the network side device, and since the second precoding information is obtained by compressing, the data size is smaller than that of the first precoding information, so that the signaling overhead of the network side device is reduced.

Optionally, as an embodiment, the first information includes the DFT window length and a starting position of the DFT window; wherein the DFT window length and the starting position of the DFT window are common to multiple transmission layers; or, the first information indicates the DFT window length and the start position of the DFT window for each transmission layer, respectively.

Optionally, as an embodiment, the apparatus further includes a determining module, configured to determine a DFT vector length; and determining the DFT vector according to the DFT vector length.

Optionally, as an embodiment, the determining module is configured to: 1) Determining the DFT vector length according to the SRS bandwidth configuration and the precoding granularity; 2) Determining the DFT vector length according to the frequency domain resource of the scheduled PUSCH and the pre-coding granularity; and 3) determining the pre-coding granularity according to the frequency domain resource of the scheduled PUSCH, and determining the DFT vector length according to the determined pre-coding granularity.

The apparatus 400 according to the embodiment of the present application may refer to the flow corresponding to the method 300 according to the embodiment of the present application, and each unit/module and the other operations and/or functions described above in the apparatus 400 are respectively for implementing the corresponding flow in the method 300 and achieving the same or equivalent technical effects, and are not described herein again for brevity.

The indication device of precoding information in the embodiment of the present application may be a device, a device or an electronic device having an operating system, or may be a component, an integrated circuit, or a chip in a terminal. The device or the electronic equipment can be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The apparatus for indicating precoding information provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2 to fig. 3, and achieve the same technical effect, and is not described here again to avoid repetition.

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

An obtaining module 502 may be configured to obtain channel information, where the channel information includes first precoding information of a plurality of subbands.

The compressing module 504 may be configured to compress the first precoding information by using a DFT vector to obtain second precoding information.

A sending module 506, configured to send indication information, where the indication information is used to indicate the second precoding information and a transmission rank corresponding to the second precoding information.

In the apparatus for indicating precoding information provided in the embodiment of the application, the DFT vector is used to compress the first precoding information corresponding to the multiple subbands to obtain the second precoding information, and the second precoding information and the transmission rank are indicated to the terminal, so that the terminal can perform uplink transmission of the multiple subbands according to the second precoding information and the transmission rank.

Optionally, as an embodiment, the first information includes the DFT window length and a starting position of the DFT window; wherein the DFT window length and a starting position of the DFT window are common to multiple transmission layers; or, the first information indicates the DFT window length and the start position of the DFT window for each transmission layer, respectively.

Optionally, as an embodiment, the obtaining module 502 is configured to obtain the channel information according to the precoding granularity and an SRS sent by the terminal.

The apparatus 500 according to the embodiment of the present application may refer to the flow corresponding to the method 200 of the embodiment of the present application, and each unit/module and the other operations and/or functions described above in the apparatus 500 are respectively for implementing the corresponding flow in the method 200 and achieving the same or equivalent technical effects, and are not described herein again for brevity.

Optionally, as shown in fig. 6, an embodiment of the present application further provides a communication device 600, which includes a processor 601, a memory 602, and a program or an instruction stored on the memory 602 and executable on the processor 601, for example, when the communication device 600 is a terminal, the program or the instruction is executed by the processor 601 to implement the processes of the foregoing precoding information indication method embodiment, and the same technical effect can be achieved. When the communication device 600 is a network device, the program or the instruction is executed by the processor 601 to implement the processes of the above-mentioned precoding information indication method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.

The embodiment of the present application further provides a terminal, which includes a processor and a communication interface, where the processor is configured to decompress the second precoding information by using a DFT vector to obtain first precoding information, where the first precoding information includes precoding information of multiple sub-bands, and the communication interface is configured to receive indication information, where the indication information is used to indicate the second precoding information and a transmission rank corresponding to the second precoding information.

The terminal embodiment corresponds to the terminal-side method embodiment, and all implementation processes and implementation manners of the method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.

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

Those skilled in the art will appreciate that the terminal 700 may further include a power supply (e.g., a battery) for supplying power to various components, which may be logically connected to the processor 710 via a power management system, so as to manage charging, discharging, and power consumption management functions 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 those shown, or combine some components, or have a different arrangement of components, and will not be described again here.

It should be understood that in the embodiment of the present application, the input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics Processing Unit 7041 processes image data of still pictures or videos 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 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 of 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, and a joystick, which are not described in detail herein.

In the embodiment of the present application, the radio frequency unit 701 receives downlink data from a network side device and then processes the downlink data in the processor 710; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one 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 as well as various data. The memory 709 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. In addition, the Memory 709 may include a high-speed random access Memory and a non-transitory Memory, wherein the non-transitory Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device.

Processor 710 may include one or more processing units; alternatively, processor 710 may integrate an application processor that handles primarily the operating system, user interface, and application programs or instructions, etc. and a modem processor that handles primarily wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 710.

The radio frequency unit 701 may be configured to receive indication information, where the indication information is used to indicate second precoding information and a transmission rank corresponding to the second precoding information.

The processor 710 may be configured to decompress the second precoding information by using a DFT vector to obtain first precoding information, where the first precoding information includes precoding information of a plurality of subbands.

According to the terminal provided by the embodiment of the application, the received second precoding information can be obtained by compressing the first precoding information corresponding to the multiple sub-bands by using the DFT vector through the network side equipment, and because the second precoding information is obtained after compression, the data volume is smaller compared with the first precoding information, and the notification signaling overhead of the network side equipment is reduced.

The terminal 700 provided in this embodiment of the present application may further implement each process of the foregoing precoding information indication method embodiment, and may achieve the same technical effect, and for avoiding repetition, details are not repeated here.

The embodiment of the present application further provides a network side device, which includes a processor and a communication interface, where the processor is configured to obtain channel information, and the channel information includes first precoding information of multiple sub-bands; and compressing the first precoding information by using a DFT vector to obtain second precoding information, wherein the communication interface is used for sending indication information, and the indication information is used for indicating the second precoding information and a transmission rank corresponding to the second precoding information.

The embodiment of the network side device corresponds to the embodiment of the method of the network side device, and all implementation processes and implementation manners of the embodiment of the method can be applied to the embodiment of the network side device and can achieve the same technical effect.

Specifically, the embodiment of the application further provides a network side device. As shown in fig. 8, the network-side device 800 includes: antenna 81, radio frequency device 82, baseband device 83. The antenna 81 is connected to a radio frequency device 82. In the uplink direction, the rf device 82 receives information through the antenna 81 and sends 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 information to the rf device 82, and the rf device 82 processes the received information and transmits the processed information through the antenna 81.

The above band processing means may be located in the baseband device 83, and the method performed by the network side device in the above embodiment may be implemented in the baseband device 83, where the baseband device 83 includes a processor 84 and a memory 85.

The baseband device 83 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 8, where one of the chips, for example, the processor 84, is connected to the memory 85 to call up a program in the memory 85 to execute the operation of the network side device shown in the above method embodiment.

The baseband device 83 may further include a network interface 86 for exchanging information with the radio frequency device 82, such as a Common Public Radio Interface (CPRI).

Specifically, the network side device in the embodiment of the present application further includes: the instructions or programs stored in the memory 85 and executable on the processor 84, and the processor 84 calls the instructions or programs in the memory 85 to execute the methods executed by the modules shown in fig. 5, and achieve the same technical effects, which are not described herein for avoiding repetition.

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 program or the instruction implements each process of the above-mentioned precoding information indication method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor may be the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the above-mentioned precoding information indication method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

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

An embodiment of the present application further provides a computer program product, where the computer program product is stored in a non-volatile memory, and the computer program product is executed by at least one processor to implement each process of the foregoing precoding information indication method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The embodiment of the present application further provides a communication device, which is configured to execute each process of the foregoing precoding information indication method embodiment, and can achieve the same technical effect, and for avoiding repetition, details are not repeated here.

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 of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application or portions thereof that contribute to the prior art may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network-side device, etc.) to execute the methods described in the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for indicating precoding information, comprising:

the method comprises the steps that network side equipment obtains channel information, wherein the channel information comprises first precoding information of a plurality of sub-bands;

the network side equipment compresses the first pre-coding information by using a Discrete Fourier Transform (DFT) vector to obtain second pre-coding information;

and the network side equipment sends indication information, wherein the indication information is used for indicating the second precoding information and a transmission rank corresponding to the second precoding information.

2. The method of claim 1, wherein the indication information comprises a first level indication information and a second level indication information;

wherein the first-stage indication information is used for indicating the transmission rank and first information in the second precoding information;

the second-level indication information is used for indicating second information in the second precoding information.

3. The method of claim 2, wherein the transmission rank and the first information are jointly encoded indications.

4. The method of claim 3, wherein the first information comprises at least one of: DFT index, DFT index number, starting DFT index number, DFT window length and starting position of DFT window.

5. The method of claim 4, wherein the first information comprises the DFT window length and a starting position of the DFT window;

wherein the DFT window length and the starting position of the DFT window are common to multiple transmission layers; or

The first information indicates the DFT window length and the start position of the DFT window for each transmission layer, respectively.

6. The method of claim 2, wherein the second information comprises at least one of: DFT index, amplitude corresponding to DFT index, and phase corresponding to DFT index.

7. The method of claim 6, wherein the second information comprises an amplitude corresponding to the DFT index and a phase corresponding to the DFT index;

wherein, the amplitude and phase corresponding to different DFT indexes are indicated independently.

8. The method according to any one of claims 1 to 7, wherein before the network side device uses a DFT vector to compress the first precoding information and obtain second precoding information, the method further comprises:

the network side equipment determines the DFT vector length;

and the network side equipment determines the DFT vector according to the DFT vector length.

9. The method of claim 8, wherein the network-side device determining the DFT vector length comprises one of:

the network side equipment determines the DFT vector length according to the SRS bandwidth configuration and the precoding granularity;

the network side equipment determines the DFT vector length according to the frequency domain resource and the pre-coding granularity of the scheduled Physical Uplink Shared Channel (PUSCH); and

and the network side equipment determines the pre-coding granularity according to the frequency domain resource of the scheduled PUSCH, and determines the DFT vector length according to the determined pre-coding granularity.

10. The method of claim 1, wherein the acquiring, by the network-side device, channel information comprises:

and the network side equipment acquires channel information according to the precoding granularity and the SRS sent by the terminal.

11. A method for indicating precoding information, comprising:

a terminal receives indication information, wherein the indication information is used for indicating second precoding information and a transmission rank corresponding to the second precoding information;

and the terminal decompresses the second precoding information by using the DFT vector to obtain first precoding information, wherein the first precoding information comprises precoding information of a plurality of sub-bands.

12. The method of claim 11, wherein the indication information comprises a first level indication information and a second level indication information;

wherein the first level indication information is used for indicating the transmission rank and the first information in the second precoding information;

13. The method of claim 12, wherein the transmission rank and the first information are jointly encoded and indicated.

14. The method of claim 13, wherein the first information comprises at least one of: DFT index, DFT index number, starting DFT index number, DFT window length and starting position of DFT window.

15. The method of claim 14, wherein the first information comprises the DFT window length and a starting position of the DFT window;

16. The method of claim 12, wherein the second information comprises at least one of: DFT index, amplitude corresponding to the DFT index, and phase corresponding to the DFT index.

17. The method of claim 16, wherein the second information comprises an amplitude corresponding to the DFT index and a phase corresponding to the DFT index;

18. The method according to any of claims 11 to 17, wherein before the terminal decompresses the second precoding information using DFT vectors to obtain the first precoding information, the method further comprises:

the terminal determines the DFT vector length;

and the terminal determines the DFT vector according to the DFT vector length.

19. The method of claim 18, wherein the terminal determining the DFT vector length comprises one of:

the terminal determines the DFT vector length according to the SRS bandwidth configuration and the precoding granularity;

the terminal determines the DFT vector length according to the scheduled frequency domain resource of the PUSCH and the pre-coding granularity; and

and the terminal determines the pre-coding granularity according to the frequency domain resource of the scheduled PUSCH and determines the DFT vector length according to the determined pre-coding granularity.

20. An apparatus for indicating precoding information, comprising:

an obtaining module, configured to obtain channel information, where the channel information includes first precoding information of multiple subbands;

the compression module is used for compressing the first precoding information by using a DFT vector to obtain second precoding information;

a sending module, configured to send indication information, where the indication information is used to indicate the second precoding information and a transmission rank corresponding to the second precoding information.

21. The apparatus of claim 20, wherein the indication information comprises a first level indication information and a second level indication information;

22. The apparatus of claim 21, wherein the transmission rank and the first information are jointly encoded indications.

23. The apparatus of any one of claims 20 to 22, further comprising a determining module for determining a DFT vector length; and determining the DFT vector according to the DFT vector length.

24. The apparatus of claim 23, wherein the determining module is configured to one of:

determining the DFT vector length according to the SRS bandwidth configuration and the precoding granularity;

determining the DFT vector length according to the frequency domain resource of the scheduled PUSCH and the pre-coding granularity; and

and determining the pre-coding granularity according to the frequency domain resource of the scheduled PUSCH, and determining the DFT vector length according to the determined pre-coding granularity.

25. An apparatus for indicating precoding information, comprising:

a receiving module, configured to receive indication information, where the indication information is used to indicate second precoding information and a transmission rank corresponding to the second precoding information;

and the decompression module is used for decompressing the second precoding information by using the DFT vector to obtain first precoding information, wherein the first precoding information comprises precoding information of a plurality of sub-bands.

26. The apparatus of claim 25, wherein the indication information comprises a first level indication information and a second level indication information;

27. The apparatus of claim 26, wherein the transmission rank and the first information are jointly encoded indications.

28. The apparatus according to any of claims 25 to 27, wherein the apparatus further comprises a determining module for determining a DFT vector length; and determining the DFT vector according to the DFT vector length.

29. The apparatus of claim 28, wherein the determining module is configured to one of:

30. A terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the method of indicating precoding information as claimed in any one of claims 11 to 19.

31. A network side device, comprising a processor, a memory, and a program or an instruction stored on the memory and executable on the processor, wherein the program or the instruction realizes the indication method of precoding information according to any one of claims 1 to 10 when executed by the processor.

32. A readable storage medium, characterized in that a program or instructions are stored thereon, which when executed by a processor implement the method of indicating precoding information as claimed in any one of claims 1 to 10, or implement the method of indicating precoding information as claimed in any one of claims 11 to 19.