CN115834006B

CN115834006B - Indication method and device of precoding information

Info

Publication number: CN115834006B
Application number: CN202111089375.6A
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: 2025-09-16
Anticipated expiration: 2041-09-16
Also published as: CN115834006A

Abstract

The embodiment of the application discloses a method and equipment for indicating precoding information, and belongs to the technical field of communication. The indicating method of the precoding information comprises the steps that network side equipment obtains channel information, 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 indicating information, wherein the indicating information is used for indicating the second precoding information.

Description

Indication method and device of 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 (Physical Uplink SHARED CHANNEL, PUSCH), the network side device may indicate precoding information in downlink control information (Downlink Control Information, DCI), where the precoding information may be a transmission precoding matrix indicator (TRANSMITTED PRECODING MATRIX INDICATOR, TPMI) or the like.

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

In order to support PUSCH for subband precoding, the network side device may indicate precoding information for each subband in signaling. However, since the number of subbands is relatively large, signaling overhead is relatively large.

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, wherein the method comprises the steps that network side equipment obtains channel information, the channel information comprises first precoding information of a plurality of sub-bands, the network side equipment uses a DFT vector to compress the first precoding information to obtain second precoding information, and the network side equipment sends the indicating information which is used for indicating the second precoding information.

In a second aspect, an indication method of precoding information is provided, wherein the indication information is used for indicating second precoding information, the terminal uses a DFT vector to decompress the second precoding information to obtain first precoding information, and the first precoding information comprises precoding information of a plurality of sub-bands.

In a third aspect, an indicating device for precoding information is provided, which includes an acquiring module configured to acquire channel information, where the channel information includes first precoding information of multiple subbands, a compressing module configured to compress the first precoding information by using a DFT vector to obtain second precoding information, and a transmitting module configured to transmit indicating information, where the indicating information is used to indicate the second precoding information.

In a fourth aspect, an indication device for precoding information is provided, which includes a receiving module configured to receive indication information, where the indication information is configured to indicate second precoding information, and a decompressing module 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 subbands.

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

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to decompress second precoding information using a DFT vector to obtain first precoding information, where the first precoding information includes precoding information of a plurality of subbands, and the communication interface is configured to receive indication information, where the indication information is configured to indicate the second precoding information.

In a seventh aspect, a network side device is provided, which comprises a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions implementing the method according to the first aspect when executed by the processor.

An eighth aspect provides a network side device, including a processor and a communication interface, where the processor is configured to obtain channel information, where the channel information includes first precoding information of multiple subbands, compress the first precoding information with a DFT vector to obtain second precoding information, and the communication interface is configured to send indication information, where the indication information is used to indicate the second precoding information.

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

In a tenth 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 to implement the method according to the first aspect or to implement the method according to the second aspect.

In an eleventh aspect, a computer program/program product is provided, the computer program/program product being stored in a non-transitory storage medium, the program/program product being executed 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 equipment compresses the first precoding information corresponding to the plurality of sub-bands by using the DFT vector to obtain the second precoding information, and indicates the second precoding information to the terminal.

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 precoding information according to an embodiment of the present application;

Fig. 3 is a schematic flow chart of a method of indicating precoding information according to an embodiment of the present application;

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

fig. 5 is a schematic structural diagram of an indication apparatus of precoding information according to an embodiment of the present application;

Fig. 6 is a schematic structural view 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

The technical solutions of 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, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, 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 sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, 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 should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also 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 (SINGLE CARRIER-Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the 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 Radio (NR) system for exemplary purposes and in most of the following description NR terminology is used, these techniques may also be applied to applications other than NR system applications, such as the 6 th Generation (6G) communication system.

Fig. 1 shows a schematic diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be called a terminal device or a User Equipment (UE), and the terminal 11 may be a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side device called a notebook (Personal DIGITAL ASSISTANT, PDA), a palm Computer, 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 (Wearable 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, furniture, etc.), and the wearable device may include a smart watch, a smart bracelet, a smart earphone, a smart glasses, a smart jewelry (smart bracelet, a finger ring, a smart necklace, a smart ankle, a smart bracelet, a smart leg link, etc.), a smart wristband, a game machine, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network, where the base station may be called a node B, an evolved node B, 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 node B, an evolved node B (eNB), a next generation node B (gNB), a home node B, a home evolved node B, a WLAN access Point, a WiFi node, a transmission and reception Point (TRANSMITTING RECEIVING Point, TRP), or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that, in the embodiment of the present application, only a base station in an NR system is taken as an example, but a specific type of the base station is not limited.

The method and the device for indicating the precoding information provided by the embodiment of the application are described in detail below 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 a method 200 for indicating precoding information, which may be performed by a network side device, in other words, by software or hardware installed in the network side device, and includes the following steps.

And S202, the network side equipment acquires channel information, wherein the channel information comprises first precoding information of a plurality of sub-bands.

Before this embodiment is performed, the network side device may receive a Sounding reference signal (Sounding REFERENCE SIGNAL, SRS) sent by the terminal. In this step, the network side device may acquire channel information according to a precoding granularity and an SRS transmitted by the terminal, where the precoding granularity may be a plurality of physical resource blocks (Physical Resource Block, PRBs).

In this example, for example, the SRS is sent by the terminal through the full bandwidth, occupies 100 PRBs, and has a precoding granularity of 5 PRBs, so that 20 subbands exist, and the network side device can obtain first precoding information corresponding to part or all of the 20 subbands respectively.

While one way for the network side device to obtain the channel information is listed above, it is 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 the channel to obtain information.

In this embodiment, the channel information acquired by the network side device may include first precoding information corresponding to each of the plurality of subbands, for example, the channel information includes first precoding information 1 corresponding to subband 1, first precoding information 2 corresponding to subband 2, first precoding information 3 corresponding to subband 3, and so on.

It should be noted that, the following description will also refer to the second precoding information, where "first" and "second" are only used to facilitate distinguishing the precoding information before compression and the precoding information after compression, and do not represent other specific meanings, where the first precoding information is the precoding information before compression, and the second precoding information is the precoding information after compression.

And S204, the network side equipment compresses the first precoding information by using a discrete Fourier transform (Discrete Fourier Transform, 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.

In this example, for example, if the network side device determines that the DFT vector length 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 DFT vectors corresponding to each DFT vector length are predefined, so that after the network side device and the terminal obtain the DFT vector lengths, the network side device and the terminal can obtain the DFT vectors corresponding to the DFT vector lengths.

While one way for the network side device to obtain the DFT vector is listed above, it will be appreciated that the network side device may also obtain the DFT vector by other means.

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 length of the DFT vector according to the SRS bandwidth configuration and the precoding granularity.

The precoding granularity may be determined by the network side device. In this example, for example, the SRS bandwidth configuration is 100 PRBs, and the precoding granularity determined by the network side device is 5 PRBs, and it is determined that the DFT vector length is 20, where the DFT vector length may be equal to the number of subbands.

2) The network side equipment determines the length of the DFT vector according to the frequency domain resource of the scheduled Physical Uplink shared channel (Physical Uplink SHARED CHANNEL, PUSCH) and the precoding granularity.

The precoding granularity may be determined by the network side device. In this example, 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) The network side equipment determines the precoding granularity according to the frequency domain resource of the scheduled PUSCH, and determines the length of the DFT vector according to the determined precoding granularity.

The example is applicable to the case where the frequency domain resources of the scheduled PUSCH are small, in which case the network side device may re-determine the precoding granularity according to the frequency domain resources 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, the precoding granularity redetermined by the network side device according to the frequency domain resource of the scheduled PUSCH is 4 PRBs, and the determined number of subbands and the DFT vector length may be 15.

And S206, the network side equipment sends indication information, wherein the indication information is used for indicating the second precoding information.

In an example, the indication information sent by the network side device may be the second precoding information itself, where the indication information may be carried by downlink control information (Downlink Control Information, DCI), and in this example, since the second precoding information is obtained after compression, compared with the first precoding information, the amount of data is smaller, which is beneficial to reducing the cost of DCI signaling.

In another example, the indication information sent by the network side device may be an index corresponding to the second precoding information, where specific content of the second precoding information may be indicated in advance by the network side device through configuration signaling, where the configuration signaling may be radio resource control (Radio Resource Control, RRC) signaling, and in this example, since the second precoding information is obtained after compression, the data size is smaller compared with the first precoding information, which is beneficial to reducing the overhead of the configuration signaling (such as RRC signaling).

According to the indicating method of the precoding information provided by the embodiment of the application, for the terminal, the terminal can also determine the length of the DFT vector by adopting the same determining method as the network side equipment, determine the DFT vector according to the determined length of the DFT vector, and decompress the second precoding information according to the determined DFT vector to obtain the first precoding information corresponding to the plurality of sub-bands respectively.

Subsequently, the terminal may perform precoding processing on uplink data to be sent by using the first precoding information, and send the uplink data through a plurality of subbands, where the uplink data may be carried by the PUSCH. For example, the terminal performs precoding processing on uplink data to be transmitted on the subband 1 using the first precoding information 1 corresponding to the subband 1, performs precoding processing on uplink data to be transmitted on the subband 2 using the first precoding information 2 corresponding to the subband 2, and so on.

According to the indicating method of the precoding information, the network side equipment compresses the first precoding information corresponding to the plurality of sub-bands by using the DFT vector to obtain the second precoding information, and indicates the second precoding information to the terminal.

Meanwhile, as the signaling cost is reduced, under the condition that the total cost of the first precoding information is unchanged, the designed signaling format is relatively simple, and the signaling cost is further reduced.

Optionally, the second precoding information mentioned in the foregoing embodiments corresponds to a transmission rank (rank), and the network side device may further indicate the transmission rank to the terminal, where the transmission rank may be indicated independently, for example, the transmission rank is indicated by independent coding, or the transmission rank may be indicated by joint coding with first information, where the first information is included in the second precoding information. The first information may be a DFT index in the second precoding information, or the first information may be information of the number of DFT indexes in the second precoding information, etc.

The value of the transmission rank indication is greater than 1 and less than or equal to the number of the transmitting antennas of the terminal, and/or the value of the transmission rank indication is determined by the network side equipment according to the transmitting capability of the terminal.

In an embodiment, when the values of the transmission rank indications corresponding to the plurality of second precoding information are not equal, the overheads of the plurality of second precoding information are equal, that is, the total overheads of the compressed second precoding information are the same according to the indicated transmission ranks.

It should be noted that, when embodiment 200 is executed, the network side device generally indicates one piece of the second precoding information, and the plurality of pieces of second precoding information mentioned in this embodiment and the subsequent embodiments may be second precoding information respectively generated when embodiment 200 is executed for a plurality of times.

In this embodiment and the subsequent embodiments, the values of the transmission rank indications corresponding to the plurality of second precoding information are not equal, for example, the value of the transmission rank indication corresponding to the second precoding information 1 is 1, the value of the transmission rank indication corresponding to the second precoding information 2 is 2, the value of the transmission rank indication corresponding to the second precoding information 3 is 3, and so on.

In this embodiment, the frequency domain resource of the scheduled PUSCH is considered to be dynamically indicated, the number of subbands also varies, and for correctly receiving indication information, the terminal needs to know the number of bits specifically sent by the network side device.

In another embodiment, in a case where values of transmission rank indications corresponding to the plurality of second precoding information are not equal, overheads of the plurality of second precoding information are not equal, that is, total overheads of the compressed second precoding information are different according to the indicated transmission ranks.

Hereinafter, the above two embodiments will be described in detail with reference to example one and example two.

Example one

The cost of a plurality of second precoding information is unequal; the overhead of precoding information corresponding to each transmission layer is equal for a plurality of transmission layers corresponding to one transmission rank, and the precoding information corresponding to each transmission layer is indicated respectively. In this example, the transmission rank may be used to indicate the number of layers of the transmission layer, e.g., a value of 2 for the transmission rank indication indicates two transmission layers and a value of 3 for the transmission rank indication indicates three transmission layers.

In this example, the amount of precoding information corresponding to each transmission layer uplink transmission is the same regardless of the value of the transmission rank indication, and the precoding information corresponding to each transmission layer is indicated separately. For example, the overhead of precoding information with a value of 2 for transmission rank indication is twice the overhead of precoding information with a value of 1 for transmission rank indication, the overhead of precoding information with a value of 3 for transmission rank indication is three times the overhead of precoding information with a value of 1 for transmission rank indication, and the overhead of precoding information with a value of 4 for transmission rank indication is four times the overhead of precoding information with a value of 1 for transmission rank indication.

In this embodiment, the compressed precoding information corresponding to each transmission layer may include at least one of a DFT window length, a DFT index, a number of DFT indexes, a magnitude corresponding to each DFT index, a phase corresponding to each DFT index, a strongest path position, i.e., a DFT index with a largest magnitude, and a DFT index relative position.

It should be noted that, the above-mentioned precoding information, for example, the compressed precoding information corresponding to each transmission layer, and the precoding information corresponding to each transmission layer may be part or all of the second precoding information.

Example two

The overhead of the second precoding information is equal, and this example can be divided into the following three cases:

1) And aiming at a plurality of transmission layers corresponding to one transmission rank, the plurality of transmission layers share one set of precoding information layer by layer. That is, no matter how much the value of the transmission rank indication is, the network side device notifies a copy of precoding information, and the precoding information corresponding to each transmission layer is the same.

2) For a plurality of transmission layers corresponding to one transmission rank, precoding information corresponding to each transmission layer is indicated respectively.

Optionally, the embodiment may further include the step that the network side device performs zero padding processing on precoding information corresponding to the transmission rank when the value of the transmission rank indication is smaller than a preset value.

In this example, for example, the precoding information corresponding to each transmission layer is indicated separately, and in order to ensure that the total overhead is the same, when the value (rank) of a certain transmission rank indication is lower than the maximum value, the network side device may make zero-padding to reach the same total bit number. For example, the maximum value of the transmission rank indication is 2, when the value of the transmission rank indication is 1, the precoding information is N bits, when the value of the transmission rank indication is 2, the precoding information is M bits, and when the network side device indicates that the value of the transmission rank indication is 1, the precoding information overhead is n+p=m bits, wherein P is the number of zero padding of the network side device.

3) The first set of DFT indexes is the DFT index corresponding to each transmission layer when the transmission rank indicates a first value, and the second set of DFT indexes is the DFT index corresponding to each transmission layer when the transmission rank indicates a second value, and the first value is smaller than the second value.

Optionally, the embodiment may further comprise the step of performing zero padding processing on the precoding information with smaller overhead if the overhead of the corresponding precoding information when the transmission rank indicates the first value and the overhead of the corresponding precoding information when the transmission rank indicates the second value are not equal.

In this example, when the indicated rank is smaller (i.e., the value of the transmission rank indication is smaller), the number of DFT indexes indicated by each transmission layer is larger, and when the rank is larger (i.e., the value of the transmission rank indication is larger), the number of DFT indexes indicated by each transmission layer is smaller, and the number of DFT indexes indicated by each transmission layer may be the same or different.

This example is, for example, 4 DFT indices indicated and corresponding amplitude and phase information when the indicated rank is 1, 2 DFT indices indicated per layer and corresponding amplitude and phase information when the indicated rank is 2, and 1 DFT indices indicated per layer and corresponding amplitude and phase information when the indicated rank is 4. If the final total overhead size is still different, zero padding processing can be further performed so that the final total overhead size is consistent.

The method for indicating precoding information according to the embodiment of the present application is described in detail above in connection with fig. 2. A method of indicating precoding information 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 terminal side is the same as the description of the network side device in the method shown in fig. 2, and the relevant description is omitted appropriately to avoid repetition.

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, which can be applied to a terminal. As shown in fig. 3, the method 300 includes the following steps.

S302, the terminal receives indication information, wherein the indication information is used for indicating second precoding information.

S304, 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 this embodiment, the second precoding information may be obtained by compressing, by the network side device, the first precoding information corresponding to the plurality of subbands by using the DFT vector.

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

According to the indicating method of the 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 plurality of sub-bands by the network side equipment by using the DFT vector, and because the second precoding information is obtained after compression, the data size is smaller compared with the first precoding information, and the notification signaling cost of the network side equipment is reduced.

Optionally, as an embodiment, the second precoding information corresponds to a transmission rank, where the transmission rank is indicated independently, or the transmission rank is indicated by joint coding with first information, where the first information is included in the second precoding information.

Optionally, as an embodiment, the value of the transmission rank indication is smaller than or equal to the number of transmit antennas of the terminal, and/or the value of the transmission rank indication is determined according to the transmission capability of the terminal.

Optionally, as an embodiment, the overhead of the plurality of second precoding information is equal, or the overhead of the plurality of second precoding information is unequal, wherein the values of transmission rank indications corresponding to the plurality of second precoding information are unequal.

Optionally, as an embodiment, the overhead of the second precoding information is not equal, wherein, for a plurality of transmission layers corresponding to one transmission rank, the overhead of the precoding information corresponding to each transmission layer is equal, and the precoding information corresponding to each transmission layer is indicated separately.

Optionally, as an embodiment, the overhead of the second precoding information is equal, wherein for a plurality of transmission layers corresponding to one transmission rank, the plurality of transmission layers share a set of precoding information, or for a plurality of transmission layers corresponding to one transmission rank, the precoding information corresponding to each transmission layer is respectively indicated, or the number of DFT indexes included in a first set of DFT indexes is greater than the number of DFT indexes included in a second set of DFT indexes, wherein the first set of DFT indexes are DFT indexes corresponding to each transmission layer when the transmission rank indicates a first value, and the second set of DFT indexes are DFT indexes corresponding to each transmission layer when the transmission rank indicates a second value, and the first value is smaller than the second value.

Optionally, as an embodiment, the precoding information includes at least one of a DFT window length, a DFT index, a number of DFT indexes, a magnitude corresponding to each DFT index, a phase corresponding to each DFT index, a strongest path position, and a DFT index relative position.

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 determining a DFT vector length, and the terminal determining the DFT vector according to the DFT vector length.

Optionally, as an embodiment, the determining the DFT vector length by the terminal includes 1) determining the DFT vector length by the terminal according to SRS bandwidth configuration and precoding granularity, 2) determining the DFT vector length by the terminal according to frequency domain resources of scheduled PUSCH and precoding granularity, and 3) determining the precoding granularity by the terminal according to frequency domain resources of scheduled PUSCH, and determining the DFT vector length according to the determined precoding granularity.

It should be noted that, in the method for indicating precoding information provided in the embodiment of the present application, the execution body may be an indication device of precoding information, or a control module for executing the method for indicating precoding information in the indication device of precoding information. In the embodiment of the present application, an indication method of precoding information performed by an indication device of precoding information is taken as an example, and the indication device 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, which may correspond to a terminal in other embodiments. As shown in fig. 4, the apparatus 400 includes the following modules.

The receiving module 402 may be configured to receive indication information, where the indication information is used to indicate the second precoding information.

The decompression module 404 may be configured to decompress the second precoding information 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 indicating device for the 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 plurality of sub-bands by the network side equipment by using the DFT vector, and because the second precoding information is obtained after compression, the data size is smaller compared with the first precoding information, and the notification signaling cost of the network side equipment is reduced.

Optionally, as an embodiment, the value of the transmission rank indication is smaller than or equal to the number of transmit antennas of the apparatus, and/or the value of the transmission rank indication is determined according to the transmission capability of the apparatus.

Optionally, as an embodiment, the apparatus further comprises a determining module for determining 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) determine a DFT vector length according to SRS bandwidth configuration and precoding granularity, 2) determine a DFT vector length according to frequency domain resources of the scheduled PUSCH and precoding granularity, and 3) determine a precoding granularity according to frequency domain resources of the scheduled PUSCH, and determine a DFT vector length according to the determined precoding granularity.

The apparatus 400 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 400 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 of the precoding information in the embodiment of the application can be a device, a device with an operating system or an electronic device, and can also be a component, an integrated circuit or a chip in a terminal. The apparatus or electronic device may be a mobile terminal or a non-mobile terminal. By way of example, mobile terminals may include, but are not limited to, the types of terminals 11 listed above, and non-mobile terminals may be servers, network attached storage (Network Attached Storage, NAS), personal computers (personal computer, PCs), televisions (TVs), teller machines, self-service machines, etc., and embodiments of the present application are not limited in particular.

The precoding information indicating device provided by the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2 to 3, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted here.

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.

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

A compression module 504, configured to compress the first precoding information by using a DFT vector to obtain second precoding information;

A sending module 506 may be configured to send indication information, where the indication information is used to indicate the second precoding information.

According to the precoding information indicating device provided by the embodiment of the application, the DFT vector is used for compressing the first precoding information corresponding to the plurality of sub-bands to obtain the second precoding information, and the second precoding information is indicated to the terminal.

Optionally, as an embodiment, the overhead of the second precoding information is equal, wherein, for a plurality of transmission layers corresponding to one transmission rank, the plurality of transmission layers share a set of precoding information, or for a plurality of transmission layers corresponding to one transmission rank, the precoding information corresponding to each transmission layer is respectively indicated, or the number of DFT indexes included in a first set of DFT indexes is greater than the number of DFT indexes included in a second set of DFT indexes, wherein, the first set of DFT indexes are DFT indexes corresponding to each transmission layer when the transmission rank indicates a first value, and the second set of DFT indexes are DFT indexes corresponding to each transmission layer when the transmission rank indicates a second value, and the first value is smaller than the second value.

Optionally, as an embodiment, in a case that precoding information corresponding to each transmission layer is indicated separately for a plurality of transmission layers corresponding to one transmission rank, the apparatus further includes a processing module, configured to perform zero padding processing on the precoding information corresponding to the transmission rank when a value of the transmission rank indication is smaller than a preset value.

Optionally, as an embodiment, in a case that the number of DFT indexes included in the first set of DFT indexes is greater than the number of DFT indexes included in the second set of DFT indexes, the apparatus further includes a processing module, configured to perform zero padding processing on precoding information with smaller cost if the cost of the corresponding precoding information when the transmission rank indicates the first value is not equal to the cost of the corresponding precoding information when the transmission rank indicates the second value.

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

The apparatus 500 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 500 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.

Optionally, as shown in fig. 6, an embodiment of the present application further provides a communication device 600, including a processor 601, a memory 602, and a program or an instruction stored in the memory 602 and capable of running on the processor 601, where, for example, the communication device 600 is a terminal, the program or the instruction implements each process of the foregoing embodiment of the method for indicating precoding information 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 each process of the foregoing embodiment of the method for indicating precoding information 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 processor is used for decompressing the second precoding information by using the DFT vector to obtain first precoding information, the first precoding information comprises precoding information of a plurality of sub-bands, and the communication interface is used for receiving indication information, and the indication information is used for indicating the second precoding information.

The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the terminal embodiment and can achieve the same technical effects. Specifically, fig. 7 is a schematic diagram of a 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 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, and a 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 processor (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 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 the embodiment of the present application, the radio frequency unit 701 receives downlink data from the network side device and processes the downlink data with the processor 710, and in addition, sends uplink data to the network side device. Typically, the radio 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 and 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, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 709 may include a high-speed random access Memory, and may also include a non-transitory Memory, wherein the non-transitory Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (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 and, optionally, processor 710 may integrate an application processor that primarily processes operating systems, user interfaces, and applications or instructions, and a modem processor that primarily processes wireless communications, 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 indication information, where the indication information is used to indicate the second precoding information.

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

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

The terminal 700 provided in the embodiment of the present application may further implement each process of the foregoing embodiment of the method for indicating precoding information, 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 processor is used for acquiring channel information, the channel information comprises first precoding information of a plurality of sub-bands, the DFT vector is used for compressing the first precoding information to obtain second precoding information, and the communication interface is used for sending indication information, and the indication information is used for indicating the second precoding information. 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, and a baseband device 83. 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 above-described band processing means may be located in the baseband means 83, and the method performed by the network-side device in the above embodiment may be implemented in the baseband means 83, and the baseband means 83 includes the processor 84 and the memory 85.

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

The baseband device 83 may further include a network interface 86 for interacting with the radio frequency device 82, such as a common public radio interface (common public radio interface, CPRI for short).

Specifically, the network side device of the embodiment of the present application further includes instructions or programs stored in the memory 85 and capable of running on the processor 84, and the processor 84 invokes the instructions or programs in the memory 85 to execute the method executed by each module shown in fig. 5, so as to achieve the same technical effects, and thus, for avoiding repetition, the description is omitted herein.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above-mentioned method embodiment for indicating precoding information, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here.

The processor may be a 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 (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or instructions, the processes of the above precoding information indicating method embodiment are realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted 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 embodiment of the present application further provides a computer program product, where the computer program product is stored in a nonvolatile memory, and the computer program product is executed by at least one processor to implement each process of the above-mentioned method embodiment for indicating precoding information, and the same technical effects can be achieved, so that repetition is avoided, and no redundant description is given here.

The embodiment of the present application further provides a communication device configured to perform each process of the foregoing embodiment of the method for indicating precoding information, and achieve the same technical effects, which is not repeated herein.

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 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 solution 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 instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network side device, etc.) to perform the method according to 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 having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

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 corresponding to a plurality of uplink sub-bands respectively;

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

The network side equipment sends indication information, wherein the indication information is used for indicating the second precoding information.

2. The method of claim 1, wherein the second precoding information corresponds to a transmission rank, wherein,

The transmission rank being independently indicated, or

The transmission rank is indicated in association with first information contained in the second precoding information.

3. The method of claim 2, wherein the step of determining the position of the substrate comprises,

The value of the transmission rank indication is less than or equal to the number of transmitting antennas of the terminal, and/or

The value of the transmission rank indication is determined according to the transmission capability of the terminal.

4. The method of claim 2, wherein the step of determining the position of the substrate comprises,

The cost of a plurality of the second precoding information is equal, or

The cost of a plurality of second precoding information is unequal;

And the values of the transmission rank indications corresponding to the second precoding information are not equal.

5. The method of claim 4, wherein a plurality of overhead of the second precoding information is not equal;

the overhead of precoding information corresponding to each transmission layer is equal for a plurality of transmission layers corresponding to one transmission rank, and the precoding information corresponding to each transmission layer is indicated respectively.

6. The method of claim 4, wherein a plurality of the second precoding information have equal overhead;

wherein, for a plurality of transmission layers corresponding to one transmission rank, the plurality of transmission layers share a set of precoding information, or

For a plurality of transmission layers corresponding to one transmission rank, precoding information corresponding to each transmission layer is respectively indicated, or

The first set of DFT indexes is the DFT index corresponding to each transmission layer when the transmission rank indicates a first value, and the second set of DFT indexes is the DFT index corresponding to each transmission layer when the transmission rank indicates a second value, and the first value is smaller than the second value.

7. The method of claim 6, wherein in the case where precoding information corresponding to each transmission layer is indicated separately for a plurality of transmission layers corresponding to one of the transmission ranks, the method further comprises:

And under the condition that the value of the transmission rank indication is smaller than a preset value, the network side equipment carries out zero padding processing on precoding information corresponding to the transmission rank.

8. The method of claim 6, wherein in the case where the first set of DFT indices includes a greater number of DFT indices than the second set of DFT indices, the method further comprises:

And if the cost of the precoding information corresponding to the transmission rank indicating the first value is not equal to the cost of the precoding information corresponding to the transmission rank indicating the second value, the network side equipment carries out zero padding processing on the precoding information with smaller cost.

9. The method according to any of claims 5 to 8, wherein the precoding information comprises at least one of:

DFT window length;

DFT index;

the number of DFT indexes;

Amplitude corresponding to each DFT index;

The phase corresponding to each DFT index;

The strongest diameter position;

DFT index relative position.

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

The network side equipment determines the length of the DFT vector;

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

11. The method of claim 10, wherein the network side device determining the DFT vector length comprises one of:

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

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

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

12. The method according to claim 1, wherein the network side device obtaining channel information includes:

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

13. A method for indicating precoding information, comprising:

The terminal receives indication information, wherein the indication information is used for indicating 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 corresponding to a plurality of uplink sub-bands respectively.

14. The method of claim 13, wherein the second precoding information corresponds to a transmission rank, wherein,

The transmission rank being independently indicated, or

15. The method of claim 14, wherein the step of providing the first information comprises,

The value of the transmission rank indication is less than or equal to the number of transmit antennas of the terminal, and/or

The value of the transmission rank indication is determined according to the transmission capabilities of the terminal.

16. The method of claim 14, wherein the step of providing the first information comprises,

The cost of a plurality of the second precoding information is equal, or

The cost of a plurality of second precoding information is unequal;

17. The method of claim 16, wherein a plurality of overhead of the second precoding information is unequal;

18. The method of claim 16, wherein a plurality of the second precoding information have equal overhead;

19. The method according to claim 17 or 18, wherein the precoding information comprises at least one of:

DFT window length;

DFT index;

the number of DFT indexes;

Amplitude corresponding to each DFT index;

The phase corresponding to each DFT index;

The strongest diameter position;

DFT index relative position.

20. The method according to any of the claims 13 to 18, wherein the terminal decompresses the second precoding information using DFT vectors, before obtaining the first precoding information, the method further comprising:

The terminal determines the length of the DFT vector;

And the terminal determines the DFT vector according to the length of the DFT vector.

21. The method of claim 20, wherein the determining the DFT vector length by the terminal comprises one of:

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

The terminal determines the length of the DFT vector according to the frequency domain resource of the scheduled PUSCH and the precoding granularity, and

And the terminal determines the precoding granularity according to the frequency domain resource of the scheduled PUSCH, and determines the length of the DFT vector according to the determined precoding granularity.

22. An apparatus for indicating precoding information, comprising:

The acquisition module is used for acquiring channel information, wherein the channel information comprises first precoding information corresponding to each of a plurality of uplink sub-bands;

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

and the sending module is used for sending indication information, wherein the indication information is used for indicating the second precoding information.

23. The apparatus of claim 22, wherein the second precoding information corresponds to a transmission rank, wherein,

The transmission rank being independently indicated, or

24. The apparatus of claim 23, wherein the device comprises a plurality of sensors,

The cost of a plurality of the second precoding information is equal, or

The cost of a plurality of second precoding information is unequal;

25. The apparatus of claim 24, wherein a plurality of overhead of the second precoding information is unequal;

26. The apparatus of claim 24, wherein a plurality of the second precoding information have equal overhead;

27. The apparatus of any one of claims 22 to 26, further comprising a determining module configured to determine a DFT vector length, and wherein the DFT vector is determined based on the DFT vector length.

28. The apparatus of claim 27, wherein the means for determining is configured to one of:

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

determining a DFT vector length according to the frequency domain resource of the scheduled PUSCH and the precoding granularity, and

And determining precoding granularity according to the frequency domain resource of the scheduled PUSCH, and determining the length of the DFT vector according to the determined precoding granularity.

29. An apparatus for indicating precoding information, comprising:

the receiving module is used for receiving indication information, wherein the indication information is used for indicating 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 corresponding to a plurality of uplink sub-bands respectively.

30. The apparatus of claim 29, wherein the second precoding information corresponds to a transmission rank, wherein,

The transmission rank being independently indicated, or

31. The apparatus of claim 30, wherein the device comprises a plurality of sensors,

The cost of a plurality of the second precoding information is equal, or

The cost of a plurality of second precoding information is unequal;

32. The apparatus of claim 31, wherein a plurality of overhead of the second precoding information is unequal;

33. The apparatus of claim 31, wherein a plurality of the second precoding information have equal overhead;

34. The apparatus of any one of claims 29 to 33, further comprising a means for determining a DFT vector length, and wherein the DFT vector is determined based on the DFT vector length.

35. The apparatus of claim 34, wherein the means for determining is configured to one of:

36. A terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements a method of indicating precoding information as claimed in any one of claims 13 to 21.

37. A network side device comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements a method of indicating precoding information as claimed in any one of claims 1 to 12.

38. A readable storage medium, wherein a program or an instruction is stored on the readable storage medium, which when executed by a processor, implements the method of indicating precoding information according to any one of claims 1 to 12, or implements the method of indicating precoding information according to any one of claims 13 to 21.