Method and apparatus for indicating precoding information

Abstract

The embodiment of the application discloses a kind of indication method and equipment of pre-coding information, belong to communication technical field.The indication method of pre-coding information of the embodiment of the application includes: network side equipment obtains channel information, the first pre-coding information of multiple subbands is included in the channel information;The network side equipment uses DFT vector to the first pre-coding information is compressed, and second pre-coding information is obtained;The network side equipment sends indication information, and the indication information is used to indicate the second pre-coding information and the transmission rank corresponding to the second pre-coding information.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and specifically relates to a method and device for indicating precoded information. Background Technology

[0002] When scheduling the Physical Uplink Shared Channel (PUSCH), network-side devices can indicate precoding information in the Downlink Control Information (DCI), which may include a Transmitted Precoding Matrix Indicator (TPMI).

[0003] The relevant technologies only support wideband precoding information indication. That is, when the network-side device schedules PUSCH, the precoding information indicated corresponds to all PUSCH resources in the scheduled frequency domain. When the terminal sends PUSCH, it uses the precoding information indicated by the network-side device to precode all PUSCH resources in the scheduled frequency domain before sending.

[0004] To support subband precoding via PUSCH, network-side devices can indicate the precoding information for each subband in the signaling. However, due to the large number of subbands, the signaling overhead is relatively high. Summary of the Invention

[0005] This application provides a method and apparatus for indicating precoded information, which can solve the problem of high signaling overhead caused by the need for network-side devices to indicate precoded information of multiple subbands.

[0006] In a first aspect, a method for indicating precoded information is provided, comprising: a network-side device acquiring channel information, the channel information including first precoded information of multiple subbands; the network-side device compressing the first precoded information using a DFT vector to obtain second precoded information; and the network-side device sending indication information, the indication information being used to indicate the second precoded information and the transmission rank corresponding to the second precoded information.

[0007] Secondly, a method for indicating precoded information is provided, comprising: a terminal receiving indication information, the indication information being used to indicate second precoded information and the transmission rank corresponding to the second precoded information; the terminal using a DFT vector to decompress the second precoded information to obtain first precoded information, the first precoded information including precoded information of multiple subbands.

[0008] Thirdly, a precoding information indication device is provided, comprising: an acquisition module for acquiring channel information, the channel information including first precoding information of multiple subbands; a compression module for compressing the first precoding information using a DFT vector to obtain second precoding information; and a transmission module for transmitting indication information, the indication information indicating the second precoding information and the transmission rank corresponding to the second precoding information.

[0009] Fourthly, a precoded information indication device is provided, comprising: a receiving module for receiving indication information, the indication information being used to indicate second precoded information and the transmission rank corresponding to the second precoded information; and a decompression module for decompressing the second precoded information using a DFT vector to obtain first precoded information, the first precoded information including precoded information of multiple subbands.

[0010] Fifthly, a terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, the program or instructions implementing the method as described in the second aspect when executed by the processor.

[0011] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to decompress the second precoded information using a DFT vector to obtain first precoded information, the first precoded information including precoded information of multiple subbands, and the communication interface is used to receive indication information, the indication information being used to indicate the second precoded information and the transmission rank corresponding to the second precoded information.

[0012] In a seventh aspect, a network-side device is provided, the network-side device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the method as described in the first aspect.

[0013] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the processor is used to acquire channel information, the channel information including first precoding information of multiple subbands; and to compress the first precoding information using a DFT vector to obtain second precoding information, and the communication interface is used to send indication information, the indication information being used to indicate the second precoding information and the transmission rank corresponding to the second precoding information.

[0014] A ninth aspect provides a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the method as described in the first aspect, or implement the method as described in the second aspect.

[0015] In a tenth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0016] Eleventhly, a computer program / program product is provided, the computer program / program product being stored in a non-transient storage medium, the program / program product being executed by at least one processor to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0017] In this embodiment, the network-side device uses DFT vectors to compress the first precoding information corresponding to multiple subbands to obtain the second precoding information, and instructs the terminal on the second precoding information and the transmission rank, so that the terminal can perform uplink transmission of multiple subbands according to the second precoding information and the transmission rank. Since the second precoding information is obtained after compression, the amount of data is smaller than that of the first precoding information, which reduces the notification signaling overhead of the network-side device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a wireless communication system according to an embodiment of this application;

[0019] Figure 2 This is a schematic flowchart of a method for indicating precoded information according to an embodiment of this application;

[0020] Figure 3 This is a schematic flowchart of a method for indicating precoded information according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the structure of a precoded information indicating device according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the structure of a precoded information indicating device according to an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of a communication device according to an embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the terminal structure according to an embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the structure of a network-side device according to an embodiment of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can 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 this application are often used interchangeably, and the described technologies can be used in the systems and radio technologies mentioned above, as well as in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description. These technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0029] Figure 1This diagram illustrates a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. In this context, terminal 11 can also be referred to as a terminal device or user equipment (UE). Terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication functions, such as refrigerators, televisions, washing machines, or furniture), etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, game consoles, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), next-generation node B (gNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0030] The following description, in conjunction with the accompanying drawings, details the method and apparatus for indicating precoded information provided in the embodiments of this application through some examples and application scenarios.

[0031] like Figure 2As shown, this application embodiment provides a method 200 for indicating precoded information. This method can be executed by a network-side device; in other words, it can be executed by software or hardware installed on the network-side device. The method includes the following steps.

[0032] S202: The network-side device acquires channel information, which includes first precoding information for multiple subbands.

[0033] Before this embodiment is executed, the network-side device can receive a Sounding Reference Signal (SRS) sent by the terminal. In this step, the network-side device can obtain channel information based on the precoding granularity and the SRS sent by the terminal. The precoding granularity can be multiple Physical Resource Blocks (PRBs).

[0034] For example, if the SRS is sent by the terminal through the full bandwidth, occupying 100 PRBs, and the precoding granularity is 5 PRBs, then there are 20 subbands. The network-side device can obtain the first precoding information corresponding to some or all of these 20 subbands.

[0035] The above describes one way for network-side devices to obtain channel information. It's understandable that network-side devices can obtain channel information through other means. For example, a network-side device can receive channel information sent by a terminal, where the terminal can measure the channel to obtain the information.

[0036] In this embodiment, the channel information obtained by the network-side device may include first precoding information corresponding to multiple subbands. For example, the channel information may include 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.

[0037] It should be noted that the second precoding information will be mentioned later. The terms "first" and "second" are used only to distinguish between the precoding information before and after compression and do not represent any other specific meaning. The first precoding information is the precoding information before compression, and the second precoding information is the precoding information after compression.

[0038] S204: The network-side device uses the DFT vector to compress the first precoded information to obtain the second precoded information.

[0039] Optionally, before S204, the network-side device may also determine the DFT vector length and determine the DFT vector based on the determined DFT vector length.

[0040] For example, if the network-side device determines that the DFT vector length is 20, then the network-side device can obtain 20 DFT vectors according to a predefined correspondence. In this embodiment, before execution, multiple DFT vector lengths and the corresponding DFT vectors for each DFT vector length are predefined. Thus, after obtaining the DFT vector length, the network-side device and the terminal can obtain the DFT vector corresponding to that length.

[0041] The above describes one way for network-side devices to obtain DFT vectors. It is understood that network-side devices can also obtain DFT vectors through other means.

[0042] Optionally, the network-side device mentioned above may determine the DFT vector length in one of the following ways.

[0043] 1) The network-side equipment determines the DFT vector length based on the SRS bandwidth configuration and precoding granularity.

[0044] The precoding granularity can be determined by the network-side device. For example, if the SRS bandwidth configuration is 100 PRBs and the network-side device determines the precoding granularity to be 5 PRBs, then the DFT vector length is determined to be 20, and the DFT vector length can be equal to the number of subbands.

[0045] 2) The network-side equipment determines the DFT vector length based on the frequency domain resources of the scheduled Physical Uplink Shared Channel (PUSCH) and the precoding granularity.

[0046] The precoding granularity can be determined by the network-side device. For example, if the PUSCH scheduled by the network-side device occupies 100 PRBs in the frequency domain, and the network-side device determines the precoding granularity to be 5 PRBs, then the DFT vector length is determined to be 20, and the DFT vector length can be equal to the number of subbands.

[0047] 3) The network-side equipment determines the precoding granularity based on the frequency domain resources of the scheduled PUSCH, and determines the DFT vector length based on the determined precoding granularity.

[0048] This example applies when the frequency domain resources of the scheduled PUSCH are limited. In this case, the network-side device can redetermine the precoding granularity based on the frequency domain resources of the scheduled PUSCH to increase the number of subbands. For instance, if the PUSCH scheduled by the network-side device occupies 60 PRBs in the frequency domain, and the default precoding granularity is 5 PRBs, and the network-side device redetermines the precoding granularity to 4 PRBs based on the frequency domain resources of the scheduled PUSCH, then the determined number of subbands and the DFT vector length can both be 15.

[0049] S206: The network-side device sends indication information, which is used to indicate the second precoding information and the transmission rank corresponding to the second precoding information.

[0050] In one example, the indication information sent by the network-side device can be either the second precoded information or the transmission rank itself. This indication information can be carried by downlink control information (DCI). In this example, since the second precoded information is obtained after compression, the amount of data is smaller than that of the first precoded information, which helps to reduce the overhead of DCI signaling.

[0051] In another example, the indication information sent by the network-side device may be the index corresponding to the second precoded information plus the transmission rank, etc. The specific content that the second precoded information plus the transmission rank may appear may be indicated in advance by the network-side device through configuration signaling, such as Radio Resource Control (RRC) signaling. In this example, since the second precoded information is obtained after compression, the data volume is smaller than that of the first precoded information, which helps to reduce the overhead of configuration signaling (such as RRC signaling).

[0052] This example uses an index to indicate the second precoding information plus the transport rank, rather than directly referring to the second precoding information plus the transport rank itself. In this way, the terminal can determine the transport rank and the second precoding information based on the indicated index. The second precoding information may include the DFT index and number corresponding to each transport layer, the starting number, etc.

[0053] The precoding information indication method provided in this application embodiment allows the terminal to determine the DFT vector length using the same determination method as the network-side device, determine the DFT vector based on the determined DFT vector length, and decompress the second precoding information based on the determined DFT vector to obtain the first precoding information corresponding to multiple subbands.

[0054] Subsequently, the terminal can also use the first precoding information plus the transmission rank to precode the uplink data to be transmitted, and transmit the uplink data through multiple subbands. This uplink data can be carried by the PUSCH. For example, the terminal can use the first precoding information 1 corresponding to subband 1 to precode the uplink data to be transmitted on subband 1, and use the first precoding information 2 corresponding to subband 2 to precode the uplink data to be transmitted on subband 2, and so on.

[0055] The precoding information indication method provided in this application embodiment involves a network-side device compressing first precoding information corresponding to multiple subbands using DFT vectors to obtain second precoding information, and then indicating the second precoding information and transmission rank to the terminal, enabling the terminal to perform uplink transmission of multiple subbands based on the second precoding information and transmission rank. Since the second precoding information is obtained after compression, its data volume is smaller than that of the first precoding information, thus reducing the notification signaling overhead of the network-side device.

[0056] Meanwhile, due to the reduced overhead of notification signaling, the designed signaling format is relatively simple while the total overhead of the first precoded information remains unchanged, which further helps to reduce signaling overhead.

[0057] Optionally, the indication information mentioned in the foregoing embodiments includes first-level indication information and second-level indication information; wherein, the first-level indication information is used to indicate the transmission rank and the first information in the second precoding information; and the second-level indication information is used to indicate the second information in the second precoding information.

[0058] Optionally, the transmission rank and the first information are jointly encoded.

[0059] In this embodiment, the first-level indication information and the second-level indication information can be carried by different signaling. For example, the first-level indication information can be carried by a first DCI, and the second-level indication information can be carried by a second DCI. Alternatively, the first-level indication information and the second-level indication information can also be carried by the same signaling. The terminal can first decode and obtain the first-level indication information, and then decode the second-level indication information based on the first-level indication information.

[0060] This embodiment can reduce the signaling overhead of the precoding information of the uplink subband. Under the two-level signaling indication, the overhead of the first-level indication information is small and the specific number of bits of the second-level indication information can be determined. It can support a large number of precoding subbands while effectively controlling the signaling overhead.

[0061] It is understood that in other embodiments, the indication information is not limited to two levels, but can be more than two levels. For example, a third level of indication information can be added. 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 of indication information is used to indicate a part of the second information in the second precoding information; and the third level of indication information is used to indicate another part of the second information in the second precoding information.

[0062] The first piece of information mentioned above may include at least one of the following: DFT index, number of DFT indices, starting DFT index number, DFT window length, and starting position of the DFT window.

[0063] In one example, the first information includes the DFT window length and the starting position of the DFT window; wherein the DFT window length and the starting position of the DFT window are shared by multiple transport layers; or, the first information indicates the DFT window length and the starting position of the DFT window for each transport layer respectively.

[0064] This example applies to cases where the DFT length is long. In other embodiments, where the DFT window length is a fixed value, it is not necessary to indicate the DFT window length; instead, the starting position of the DFT window can be indicated.

[0065] The second piece of information mentioned above includes at least one of the following: the DFT index, the magnitude corresponding to the DFT index, and the phase corresponding to the DFT index.

[0066] In one example, the second information includes the amplitude corresponding to the DFT index and the phase corresponding to the DFT index; wherein the amplitude and phase corresponding to different DFT indices are indicated independently.

[0067] To explain in detail the precoding information indication method provided in the embodiments of this application, the following will be described in conjunction with several specific tabular embodiments. Tables 1 to 5 mainly list the content of the compressed second precoding information, which specifically corresponds to the content indicated by the first-level indication information in the previous embodiments.

[0068] Example 1

[0069] This embodiment can be found in Table 1.

[0070] Table 1

[0071]

[0072] In this embodiment, the specific precoding information (i.e., the second precoding information, and so on) can 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].

[0073] As shown in Table 1 above, there are a total of 8 DFT vectors, with 3 bits for amplitude quantization and 2 bits for phase quantization. The total pre-coded information is: [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, 3+2 bits], for a total of 35 bits.

[0074] Example 2

[0075] This embodiment can be found in Table 2.

[0076] Table 2

[0077]

[0078]

[0079] In this embodiment, the specific precoding information can 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].

[0080] As shown in Table 2 above, there are a total of 8 DFT vectors, with 3 bits for amplitude quantization and 2 bits for phase quantization. The total pre-coded 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], for a total of 19 bits.

[0081] Example 3

[0082] This embodiment can be found in Table 3.

[0083] Table 3

[0084]

[0085]

[0086] In this embodiment, the specific precoding information can indicate the following: [index], [window length], [starting 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].

[0087] Taking Table 3 above as an example, the window length is 8 (there are 4 options, or a fixed window length), the maximum window length is 16, the amplitude quantization is 3 bits, and the phase quantization is 2 bits. Then the total pre-coding information is: [index, 3 bits], [window length, 2 bits] (these 2 bits are not needed when the window length is 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], [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], a total of 41 (or 39) bits.

[0088] Example 4

[0089] This embodiment can be found in Table 4.

[0090] Table 4

[0091]

[0092]

[0093] In this embodiment, the specific precoding information can indicate the following: [index], [starting number 1], [starting 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].

[0094] Taking Table 4 above as an example, the window length is a fixed window length of 8, the maximum window length is 16, the amplitude quantization is 3 bits, and the phase quantization is 2 bits. Then the total pre-coded 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], a total of 43 bits.

[0095] Example 5

[0096] This embodiment can be found in Table 5.

[0097] Table 5

[0098]

[0099] In this embodiment, the specific precoding information can indicate the following: [index], [starting number 1], [starting number 2], [DFT index 1], [DFT index 2], [amplitude and phase corresponding to DFT index 1], [amplitude and phase corresponding to DFT index 2].

[0100] For example, as shown in Table 5 above, the window length is a fixed window length of 8, the maximum window length is 16, the amplitude quantization is 3 bits, and the phase quantization is 2 bits. Then the total pre-coded 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], [amplitude and phase corresponding to DFT index 1, 3+2 bits], [amplitude and phase corresponding to DFT index 2, 3+2 bits], for a total of 27 bits.

[0101] The above combination Figure 2 A method for indicating precoded information according to embodiments of this application is described in detail. The following will combine... Figure 3 A method for indicating precoded information according to another embodiment of this application is described in detail. It will be understood that the interaction between the network-side device and the terminal described from the terminal side... Figure 2 The descriptions of the network-side devices in the methods shown are the same; to avoid repetition, relevant descriptions have been omitted as appropriate.

[0102] Figure 3 This is a schematic diagram illustrating the implementation flow of a precoded information indication method according to an embodiment of this application, which can be applied to a terminal. For example... Figure 3 As shown, the method 300 includes the following steps.

[0103] S302: The terminal receives indication information, which is used to indicate the second precoding information and the transmission rank corresponding to the second precoding information.

[0104] S304: The terminal uses the DFT vector to decompress the second precoding information to obtain the first precoding information, which includes precoding information of multiple subbands.

[0105] Optionally, after S304, the terminal can also use the transmission rank and the first precoding information to precode the uplink data to be transmitted, and transmit the uplink data through multiple subbands, which can be carried by the PUSCH.

[0106] The precoding information indication method provided in this application embodiment can be obtained by the network-side device compressing the first precoding information corresponding to multiple subbands using DFT vectors. Since the second precoding information is obtained after compression, the data volume is smaller than that of the first precoding information, which reduces the notification signaling overhead of the network-side device.

[0107] Optionally, as an embodiment, the indication information includes first-level indication information and second-level indication information; wherein, the first-level indication information is used to indicate the transmission rank and the first information in the second precoding information; and the second-level indication information is used to indicate the second information in the second precoding information.

[0108] Alternatively, as an embodiment, the transmission rank and the first information are jointly encoded.

[0109] Optionally, as an embodiment, the first information includes at least one of the following: DFT index, number of DFT indices, starting DFT index number, DFT window length, and starting position of the DFT window.

[0110] Optionally, as an embodiment, the first information includes the DFT window length and the starting position of the DFT window; wherein the DFT window length and the starting position of the DFT window are shared by multiple transport layers; or, the first information indicates the DFT window length and the starting position of the DFT window for each transport layer respectively.

[0111] Optionally, as an embodiment, the second information includes at least one of the following: DFT index, amplitude corresponding to the DFT index, and phase corresponding to the DFT index.

[0112] Optionally, as an embodiment, the second information includes the amplitude corresponding to the DFT index and the phase corresponding to the DFT index; wherein the amplitude and phase corresponding to different DFT indices are indicated independently.

[0113] Optionally, as an embodiment, before the terminal decompresses the second precoded information using the DFT vector to obtain the first precoded information, the method further includes: the terminal determining the length of the DFT vector; the terminal determining the DFT vector based on the length of the DFT vector.

[0114] Optionally, as an embodiment, the terminal determines the DFT vector length by one of the following: 1) the terminal determines the DFT vector length based on the SRS bandwidth configuration and precoding granularity; 2) the terminal determines the DFT vector length based on the frequency domain resources of the scheduled PUSCH and the precoding granularity; and 3) the terminal determines the precoding granularity based on the frequency domain resources of the scheduled PUSCH, and determines the DFT vector length based on the determined precoding granularity.

[0115] It should be noted that the precoded information indication method provided in this application embodiment can be executed by a precoded information indication device, or by a control module in the precoded information indication device for executing the precoded information indication method. This application embodiment uses the execution of the precoded information indication method by a precoded information indication device as an example to illustrate the precoded information indication device provided in this application embodiment.

[0116] Figure 4 This is a schematic diagram of a pre-encoded information indicating device according to an embodiment of this application. This device may correspond to a terminal in other embodiments. Figure 4 As shown, the device 400 includes the following modules.

[0117] The receiving module 402 can be used to receive indication information, which is used to indicate the second precoding information and the transmission rank corresponding to the second precoding information.

[0118] The decompression module 404 can be used to decompress the second precoded information using DFT vectors to obtain the first precoded information, which includes precoded information of multiple subbands.

[0119] The precoding information indication device provided in this application embodiment can be obtained by the network-side device compressing the first precoding information corresponding to multiple subbands using DFT vectors. Since the second precoding information is obtained after compression, the amount of data is smaller than that of the first precoding information, which reduces the notification signaling overhead of the network-side device.

[0120] Optionally, as an embodiment, the indication information includes first-level indication information and second-level indication information; wherein, the first-level indication information is used to indicate the transmission rank and the first information in the second precoding information; and the second-level indication information is used to indicate the second information in the second precoding information.

[0121] Alternatively, as an embodiment, the transmission rank and the first information are jointly encoded.

[0122] Optionally, as an embodiment, the first information includes at least one of the following: DFT index, number of DFT indices, starting DFT index number, DFT window length, and starting position of the DFT window.

[0123] Optionally, as an embodiment, the first information includes the DFT window length and the starting position of the DFT window; wherein the DFT window length and the starting position of the DFT window are shared by multiple transport layers; or, the first information indicates the DFT window length and the starting position of the DFT window for each transport layer respectively.

[0124] Optionally, as an embodiment, the second information includes at least one of the following: DFT index, amplitude corresponding to the DFT index, and phase corresponding to the DFT index.

[0125] Optionally, as an embodiment, the second information includes the amplitude corresponding to the DFT index and the phase corresponding to the DFT index; wherein the amplitude and phase corresponding to different DFT indices are indicated independently.

[0126] Optionally, as an embodiment, the apparatus further includes a determining module for determining the DFT vector length and determining the DFT vector based on the DFT vector length.

[0127] Optionally, as an embodiment, the determining module is used to: 1) determine the DFT vector length based on the SRS bandwidth configuration and precoding granularity; 2) determine the DFT vector length based on the frequency domain resources of the scheduled PUSCH and the precoding granularity; and 3) determine the precoding granularity based on the frequency domain resources of the scheduled PUSCH, and determine the DFT vector length based on the determined precoding granularity.

[0128] The apparatus 400 according to the embodiments of this application can refer to the flow of the method 300 corresponding to the embodiments of this application. Furthermore, 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 can achieve the same or equivalent technical effects. For the sake of brevity, they will not be described in detail here.

[0129] The precoded information indicating device in this application embodiment can be a device, a device with an operating system, or an electronic device, or it can be a component, integrated circuit, or chip in a terminal. The device or electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminals 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the type of terminal.

[0130] The precoded information indicating device provided in this application embodiment can realize Figures 2 to 3 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0131] Figure 5 This is a schematic diagram of a pre-encoded information indicating device according to an embodiment of this application. This device may correspond to a network-side device in other embodiments. Figure 5 As shown, the device 500 includes the following modules.

[0132] The acquisition module 502 can be used to acquire channel information, which includes first precoding information of multiple subbands.

[0133] The compression module 504 can be used to compress the first precoded information using DFT vectors to obtain the second precoded information.

[0134] The sending module 506 can be used to send indication information, which is used to indicate the second precoding information and the transmission rank corresponding to the second precoding information.

[0135] The precoding information indication device provided in this application embodiment uses DFT vectors to compress the first precoding information corresponding to multiple subbands to obtain the second precoding information, and indicates the second precoding information and transmission rank to the terminal, so that the terminal can perform uplink transmission of multiple subbands according to the second precoding information and transmission rank. Since the second precoding information is obtained after compression, the data volume is smaller than that of the first precoding information, which reduces the notification signaling overhead of the network side device.

[0136] Optionally, as an embodiment, the indication information includes first-level indication information and second-level indication information; wherein, the first-level indication information is used to indicate the transmission rank and the first information in the second precoding information; and the second-level indication information is used to indicate the second information in the second precoding information.

[0137] Alternatively, as an embodiment, the transmission rank and the first information are jointly encoded.

[0138] Optionally, as an embodiment, the first information includes at least one of the following: DFT index, number of DFT indices, starting DFT index number, DFT window length, and starting position of the DFT window.

[0139] Optionally, as an embodiment, the first information includes the DFT window length and the starting position of the DFT window; wherein the DFT window length and the starting position of the DFT window are shared by multiple transport layers; or, the first information indicates the DFT window length and the starting position of the DFT window for each transport layer respectively.

[0140] Optionally, as an embodiment, the second information includes at least one of the following: DFT index, amplitude corresponding to the DFT index, and phase corresponding to the DFT index.

[0141] Optionally, as an embodiment, the second information includes the amplitude corresponding to the DFT index and the phase corresponding to the DFT index; wherein the amplitude and phase corresponding to different DFT indices are indicated independently.

[0142] Optionally, as an embodiment, the apparatus further includes a determining module for determining the DFT vector length and determining the DFT vector based on the DFT vector length.

[0143] Optionally, as an embodiment, the determining module is used to: 1) determine the DFT vector length based on the SRS bandwidth configuration and precoding granularity; 2) determine the DFT vector length based on the frequency domain resources of the scheduled PUSCH and the precoding granularity; and 3) determine the precoding granularity based on the frequency domain resources of the scheduled PUSCH, and determine the DFT vector length based on the determined precoding granularity.

[0144] Optionally, as an embodiment, the acquisition module 502 is used to acquire channel information based on the precoding granularity and the SRS sent by the terminal.

[0145] The apparatus 500 according to the embodiments of this application can refer to the flow of the method 200 corresponding to the embodiments of this application. Furthermore, 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 can achieve the same or equivalent technical effects. For the sake of brevity, they will not be described in detail here.

[0146] Optional, such as Figure 6As shown, this application embodiment also provides a communication device 600, including a processor 601, a memory 602, and a program or instructions stored in the memory 602 and executable on the processor 601. For example, when the communication device 600 is a terminal, the program or instructions executed by the processor 601 implement the various processes of the above-described pre-encoded information indication method embodiment, and achieve the same technical effect. When the communication device 600 is a network-side device, the program or instructions executed by the processor 601 implement the various processes of the above-described pre-encoded information indication method embodiment, and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0147] This application embodiment also provides a terminal, including a processor and a communication interface. The processor is used to decompress the second precoded information using a DFT vector to obtain first precoded information. The first precoded information includes precoded information of multiple sub-bands. The communication interface is used to receive indication information, which is used to indicate the second precoded information and the transmission rank corresponding to the second precoded information.

[0148] This terminal embodiment corresponds to the aforementioned terminal-side method embodiment. All implementation processes and methods of the aforementioned method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 7 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0149] The terminal 700 includes, but is not limited to, at least some of the following components: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, and processor 710.

[0150] Those skilled in the art will understand that the terminal 700 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 710 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 7 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0151] It should be understood that, in this embodiment, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042. The GPU 7041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 706 may include a display panel 7061, which 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 called a touch screen. The touch panel 7071 may include a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0152] In this embodiment, the radio frequency unit 701 receives downlink data from the network-side device and processes it for the processor 710; additionally, it sends uplink data to the network-side device. Typically, the 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, etc.

[0153] The memory 709 can be used to store software programs or instructions and various data. The memory 709 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 709 may include high-speed random access memory and non-transient memory, wherein the non-transient memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-transient solid-state storage device.

[0154] Processor 710 may include one or more processing units; optionally, processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 710.

[0155] The radio frequency unit 701 can be used to receive indication information, which is used to indicate the second precoding information and the transmission rank corresponding to the second precoding information.

[0156] The processor 710 can be used to decompress the second precoded information using a DFT vector to obtain first precoded information, the first precoded information including precoded information of multiple subbands.

[0157] The terminal provided in this application embodiment receives second precoded information, which may be obtained by the network-side device compressing the first precoded information corresponding to multiple subbands using DFT vectors. Since the second precoded information is obtained after compression, the amount of data is smaller than that of the first precoded information, thus reducing the notification signaling overhead of the network-side device.

[0158] The terminal 700 provided in this application embodiment can also implement various processes of the above-described pre-encoded information indication method embodiment and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0159] This application embodiment also provides a network-side device, including a processor and a communication interface. The processor is used to acquire channel information, the channel information including first precoding information of multiple subbands; and to compress the first precoding information using a DFT vector to obtain second precoding information. The communication interface is used to send indication information, the indication information being used to indicate the second precoding information and the transmission rank corresponding to the second precoding information.

[0160] This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiment can be applied to this network-side device embodiment and can achieve the same technical effect.

[0161] Specifically, embodiments of this application also provide a network-side device. For example... Figure 8 As shown, the network-side device 800 includes: an antenna 81, a radio frequency (RF) device 82, and a baseband device 83. The antenna 81 is connected to the RF device 82. In the uplink direction, the RF device 82 receives information through the antenna 81 and transmits the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be transmitted and sends it to the RF device 82. The RF device 82 processes the received information and then transmits it through the antenna 81.

[0162] The aforementioned frequency band processing device can be located in the baseband device 83. The method executed by the network-side device in the above embodiments can be implemented in the baseband device 83, which includes a processor 84 and a memory 85.

[0163] Baseband device 83 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 8 As shown, one of the chips, for example, is a processor 84, which is connected to a memory 85 to call the program in the memory 85 and execute the network-side device operations shown in the above method embodiments.

[0164] The baseband device 83 may also include a network interface 86 for exchanging information with the radio frequency device 82, such as a common public radio interface (CPRI).

[0165] Specifically, the network-side device in this application embodiment further includes: instructions or programs stored in memory 85 and executable on processor 84, wherein processor 84 calls the instructions or programs in memory 85 to execute. Figure 5 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0166] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described method for indicating pre-encoded information and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0167] The processor may be the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0168] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described pre-encoded information indication method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0169] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0170] This application also provides a computer program product, which is stored in a non-volatile memory. The computer program product is executed by at least one processor to implement the various processes of the above-described method for indicating pre-encoded information, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0171] This application also provides a communication device configured to execute various processes of the above-described precoded information indication method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0172] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0173] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network-side device, etc.) to execute the methods described in the various embodiments of this application.

[0174] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for indicating precoded information, characterized in that, include: The network-side device acquires channel information, which includes first precoding information corresponding to multiple sub-bands; The network-side device uses a Discrete Fourier Transform (DFT) vector to compress the first precoded information to obtain the second precoded information; The network-side device sends indication information, which includes the second precoding information and the transmission rank; or, the indication information includes an index, which corresponds to the second precoding information and the transmission rank. The indication information includes first-level indication information and second-level indication information. The first-level 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 to indicate the second information in the second precoded information.

2. The method according to claim 1, characterized in that, The transmission rank and the first information are jointly encoded.

3. The method according to claim 2, characterized in that, The first information includes at least one of the following: DFT index, number of DFT indices, starting DFT index number, DFT window length, and starting position of the DFT window.

4. The method according to claim 3, characterized in that, The first information includes the length of the DFT window and the starting position of the DFT window; Wherein, the DFT window length and the starting position of the DFT window are shared by multiple transport layers; or The first information indicates the DFT window length and the starting position of the DFT window for each transport layer.

5. The method according to claim 1, characterized in that, The second information includes at least one of the following: DFT index, amplitude corresponding to the DFT index, and phase corresponding to the DFT index.

6. The method according to claim 5, characterized in that, The second information includes the magnitude corresponding to the DFT index and the phase corresponding to the DFT index; The amplitude and phase corresponding to different DFT indices are indicated independently.

7. The method according to any one of claims 1 to 6, characterized in that, Before the network-side device compresses the first precoded information using a DFT vector to obtain the second precoded information, the method further includes: The network-side device determines the DFT vector length; The network-side device determines the DFT vector based on the DFT vector length.

8. The method according to claim 7, characterized in that, The network-side device determines the DFT vector length using one of the following methods: The network-side device determines the DFT vector length based on the SRS bandwidth configuration and precoding granularity. The network-side device determines the DFT vector length based on the frequency domain resources of the scheduled Physical Uplink Shared Channel (PUSCH) and the precoding granularity; and The network-side device determines the precoding granularity based on the frequency domain resources of the scheduled PUSCH, and determines the DFT vector length based on the determined precoding granularity.

9. The method according to claim 1, characterized in that, The network-side device acquires channel information including: The network-side device obtains channel information based on the precoding granularity and the SRS sent by the terminal.

10. A method for indicating precoded information, characterized in that, include: The terminal receives indication information, which includes the second precoding information and the transmission rank; Alternatively, the indication information includes an index corresponding to the second precoding information and the transmission rank; The terminal uses DFT vectors to decompress the second precoding information to obtain first precoding information, which includes precoding information corresponding to multiple subbands. The indication information includes first-level indication information and second-level indication information. The first-level 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 to indicate the second information in the second precoded information.

11. The method according to claim 10, characterized in that, The transmission rank and the first information are jointly encoded.

12. The method according to claim 11, characterized in that, The first information includes at least one of the following: DFT index, number of DFT indices, starting DFT index number, DFT window length, and starting position of the DFT window.

13. The method according to claim 12, characterized in that, The first information includes the length of the DFT window and the starting position of the DFT window; Wherein, the DFT window length and the starting position of the DFT window are shared by multiple transport layers; or The first information indicates the DFT window length and the starting position of the DFT window for each transport layer.

14. The method according to claim 10, characterized in that, The second information includes at least one of the following: DFT index, amplitude corresponding to the DFT index, and phase corresponding to the DFT index.

15. The method according to claim 14, characterized in that, The second information includes the magnitude corresponding to the DFT index and the phase corresponding to the DFT index; The amplitude and phase corresponding to different DFT indices are indicated independently.

16. The method according to any one of claims 10 to 15, characterized in that, Before the terminal decompresses the second precoded information using the DFT vector to obtain the first precoded information, the method further includes: The terminal determines the DFT vector length; The terminal determines the DFT vector based on the length of the DFT vector.

17. The method according to claim 16, characterized in that, The terminal determines the DFT vector length using one of the following methods: The terminal determines the DFT vector length based on the SRS bandwidth configuration and precoding granularity. The terminal determines the DFT vector length based on the frequency domain resources of the scheduled PUSCH and the precoding granularity; and The terminal determines the precoding granularity based on the frequency domain resources of the scheduled PUSCH, and determines the DFT vector length based on the determined precoding granularity.

18. A device for indicating pre-encoded information, characterized in that, include: The acquisition module is used to acquire channel information, which includes first precoding information corresponding to multiple sub-bands. A compression module is used to compress the first precoded information using a DFT vector to obtain the second precoded information; A sending module is configured to send indication information, the indication information including the second precoding information and the transmission rank; or, the indication information includes an index corresponding to the second precoding information and the transmission rank; The indication information includes first-level indication information and second-level indication information. The first-level 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 to indicate the second information in the second precoded information.

19. The apparatus according to claim 18, characterized in that, The transmission rank and the first information are jointly encoded.

20. The apparatus according to claim 18 or 19, characterized in that, The apparatus further includes a determining module for determining the DFT vector length; and determining the DFT vector based on the DFT vector length.

21. The apparatus according to claim 20, characterized in that, The determining module is used for one of the following: The DFT vector length is determined based on the SRS bandwidth configuration and precoding granularity. The DFT vector length is determined based on the frequency domain resources of the scheduled PUSCH and the precoding granularity; and The precoding granularity is determined based on the frequency domain resources of the scheduled PUSCH, and the DFT vector length is determined based on the determined precoding granularity.

22. A device for indicating pre-encoded information, characterized in that, include: A receiving module is configured to receive indication information, the indication information including the second precoding information and the transmission rank; Alternatively, the indication information includes an index corresponding to the second precoding information and the transmission rank; The decompression module is used to decompress the second precoded information using DFT vectors to obtain the first precoded information, which includes precoded information corresponding to multiple subbands respectively. The indication information includes first-level indication information and second-level indication information. The first-level 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 to indicate the second information in the second precoded information.

23. The apparatus according to claim 22, characterized in that, The transmission rank and the first information are jointly encoded.

24. The apparatus according to claim 22 or 23, characterized in that, The apparatus further includes a determining module for determining the DFT vector length; and determining the DFT vector based on the DFT vector length.

25. The apparatus according to claim 24, characterized in that, The determining module is used for one of the following: The DFT vector length is determined based on the SRS bandwidth configuration and precoding granularity. The DFT vector length is determined based on the frequency domain resources of the scheduled PUSCH and the precoding granularity; and The precoding granularity is determined based on the frequency domain resources of the scheduled PUSCH, and the DFT vector length is determined based on the determined precoding granularity.

26. A terminal, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the method for indicating precoded information as described in any one of claims 10 to 17.

27. A network-side device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the method for indicating precoded information as described in any one of claims 1 to 9.

28. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the method for indicating precoded information as described in any one of claims 1 to 9, or the method for indicating precoded information as described in any one of claims 10 to 17.

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