CSI feedback methods, terminal devices and network devices

Abstract

The present application relates to CSI feedback methods, terminal devices, network devices, a chip, a computer-readable storage medium, a computer program product, a computer program and a communication system. A CSI feedback method comprises: a terminal device determining a first CSI feedback mode; and on the basis of the first CSI feedback mode, the terminal device processing first CSI to obtain CSI indication information, and sending the CSI indication information to a network device. The embodiment of the present application can ensure the correct transmission and parsing of CSI indication information.

Description

CSI feedback method, terminal device and network device Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a CSI (Channel-State Information) feedback method, terminal equipment, network equipment, chip, computer-readable storage medium, computer program product, computer program, and communication system. Background Art

[0002] CSI feedback is crucial in wireless communication systems. Generally speaking, CSI feedback in wireless communication systems can include indications of information such as CQI, PMI, and RI. From a process perspective, the network device first configures the indication parameter information used for CSI feedback. This indication parameter information, for example, represents the type of information the UE (User Equipment) needs to indicate, including CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), and RI (Rank Indicator). The network device also configures some reference signals for CSI measurement. The UE determines the current CSI status by measuring the reference signals. The UE indicates the determined CSI to the network device, which then configures a reasonable and efficient data transmission method based on the current channel conditions. It is important to consider how to correctly transmit and interpret CSI indication information.

[0003] Summary of the Invention

[0004] Embodiments of the present application provide a CSI feedback method, terminal device, network device, chip, computer-readable storage medium, computer program product, computer program, and communication system, which can ensure the correct transmission and parsing of CSI indication information.

[0005] This embodiment of the present application provides a CSI feedback method, including:

[0006] The terminal device determines a first CSI feedback mode;

[0007] The terminal device processes the first CSI based on the first CSI feedback method, obtains CSI indication information, and sends the CSI indication information to the network device.

[0008] This embodiment of the present application provides a CSI feedback method, including:

[0009] The network device determines a first CSI feedback mode;

[0010] The network device receives CSI indication information from the terminal device, processes the CSI indication information based on a decoding method corresponding to the first CSI feedback method, and obtains a second CSI.

[0011] An embodiment of the present application provides a terminal device, including:

[0012] a first processing module, configured to determine a first CSI feedback mode, and process the first CSI based on the first CSI feedback mode to obtain CSI indication information;

[0013] The first communication module is used to send CSI indication information to the network device.

[0014] An embodiment of the present application provides a network device, including:

[0015] A second communication module is configured to receive CSI indication information from a terminal device;

[0016] The second processing module is used to determine a first CSI feedback mode, and process the CSI indication information based on a decoding mode corresponding to the first CSI feedback mode to obtain a second CSI; wherein the first CSI feedback mode is agreed upon with the terminal device.

[0017] An embodiment of the present application provides a terminal device, comprising: a transceiver, a processor, and a memory. The memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and execute the computer program stored in the memory to enable the terminal device to perform the above-mentioned CSI feedback method.

[0018] An embodiment of the present application provides a network device, comprising: a transceiver, a processor, and a memory. The memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and execute the computer program stored in the memory to enable the network device to perform the above-mentioned CSI feedback method.

[0019] An embodiment of the present application provides a chip for implementing the above-mentioned CSI feedback method.

[0020] Specifically, the chip includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned CSI feedback method.

[0021] An embodiment of the present application provides a computer-readable storage medium for storing a computer program. When the computer program is executed by a device, the device executes the above-mentioned CSI feedback method.

[0022] An embodiment of the present application provides a computer program product, including computer program instructions, which enable a computer to execute the above-mentioned CSI feedback method.

[0023] An embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the above-mentioned CSI feedback method.

[0024] In this embodiment of the present application, a terminal device processes the first CSI based on a first CSI feedback method to obtain CSI indication information; a network device processes the first CSI using a decoding method corresponding to the first CSI feedback method to obtain second CSI. The two ends align their transmission and reception, thereby ensuring the correct transmission and interpretation of the CSI indication information. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application.

[0026] FIG2 is a schematic diagram of the basic process of CSI feedback.

[0027] FIG3 is a schematic diagram of the basic structure of a neural network.

[0028] FIG4 is a schematic diagram of a basic network architecture for CSI indication based on AI / ML.

[0029] FIG5 is a schematic flowchart of a CSI feedback method according to an embodiment of the present application.

[0030] FIG6 is a schematic flowchart of a CSI feedback method according to another embodiment of the present application.

[0031] FIG7 is an interactive flow chart of an application example of the CSI feedback method in an embodiment of the present application.

[0032] FIG8 is an interactive flowchart of another application example of the CSI feedback method in an embodiment of the present application.

[0033] FIG9 is an interactive flow chart of another application example of the CSI feedback method in an embodiment of the present application.

[0034] FIG10 is an interactive flowchart of another application example of the CSI feedback method in an embodiment of the present application.

[0035] FIG11 is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0036] FIG12 is a schematic block diagram of a network device according to an embodiment of the present application.

[0037] FIG13 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0038] FIG14 is a schematic block diagram of a chip according to an embodiment of the present application.

[0039] FIG15 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0041] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), Fifth Generation Communication (5G) system, Sixth Generation Communication (6G) system or other communication systems.

[0042] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0043] In one embodiment, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0044] In one embodiment, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0045] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0046] The terminal device can be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0047] In an embodiment of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0048] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0049] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0050] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in a WLAN, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network or a network device in an NTN network, etc.

[0051] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Alternatively, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0052] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0053] FIG1 exemplarily illustrates a communication system 100. The communication system includes a network device 110 and two terminal devices 120. In one embodiment, the communication system 100 may include multiple network devices 110, and each network device 110 may include a different number of terminal devices 120 within its coverage area, which is not limited in this embodiment of the present application.

[0054] It should be understood that in the embodiments of the present application, a device having a communication function in a network / system may be referred to as a communication device. Taking the communication system shown in Figure 1 as an example, the communication device may include a network device and a terminal device having a communication function. The network device and the terminal device may be specific devices in the embodiments of the present application and will not be described in detail here. The communication device may also include other devices in the communication system, such as a network controller, a mobility management entity, and other network entities, which are not limited in the embodiments of the present application.

[0055] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0056] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0057] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0058] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0059] 1. CSI acquisition and indication methods in current wireless communication systems

[0060] In LTE and NR systems, the indication (or feedback) of CSI determines the performance of MIMO transmission. Generally speaking, CSI feedback in existing systems can include indications of CQI, PMI, RI and other information. Figure 2 is a schematic diagram of the basic process of CSI feedback. The network equipment (such as a base station) will first configure the indication parameter information for CSI indication, for example, which information of CQI, PMI, RI and other information the UE needs to indicate. The network equipment will also configure some reference signals for CSI measurement. The UE determines the current channel state information by measuring the reference signals. The UE will also indicate / feedback the determined channel state information to the base station so that the base station can configure a reasonable and efficient data transmission method based on the current channel conditions.

[0061] As shown in Figure 2, during the above process, the UE needs to perform two coding operations on the channel state information. The first encoding operation is to encode the original channel information to obtain the encoded channel information. The main purpose of this operation is to compress the information to be transmitted as much as possible, thereby ensuring transmission efficiency while reducing air interface overhead. Therefore, it is also called compression coding. The second encoding operation is to perform channel coding on the information to be transmitted, so that the information to be transmitted can be better received and recognized by the network side. For example, it can be encoded using polar codes or LDPC (Low Density Parity Check) coding.

[0062] 2. Artificial Intelligence

[0063] In recent years, AI (Artificial Intelligence) research represented by neural networks has achieved great results in many fields, and it will play an important role in people's production and life for a long time to come.

[0064] Figure 3 illustrates the basic structure of a neural network. As shown in Figure 3, the basic structure of a simple neural network consists of an input layer, a hidden layer, and an output layer. The input layer receives data, the hidden layer processes it, and the output layer produces the final result. Each node represents a processing unit, which can be thought of as simulating a neuron. Multiple neurons form a layer of a neural network, and the multi-layered information transmission and processing constructs the overall neural network.

[0065] With the continuous development of neural network research, neural network deep learning algorithms have been proposed in recent years. More hidden layers have been introduced, and feature learning has been performed layer by layer through multi-hidden layer neural network training, which has greatly improved the learning and processing capabilities of neural networks. It has also been widely used in pattern recognition, signal processing, optimization combination, anomaly detection and other aspects.

[0066] 3. CSI indication based on AI / ML (Machine Learning)

[0067] Figure 4 is a schematic diagram of a basic network architecture for CSI indication based on AI / ML. In this type of method, the encoder first compresses the original channel information through the encoder's neural network model to generate channel state indication information (CSI indication information), and transmits the channel state indication information; the decoder recovers the channel state indication information through the decoder's neural network model to generate feedback channel information for channel quality information recovery.

[0068] Current research on AI / ML-based CSI compression and recovery primarily focuses on the compression and recovery of the CSI itself. The compressed CSI remains part of the UCI (Uplink Control Information) or PUSCH (Physical Uplink Shared Channel), requiring traditional channel coding for transmission between the UE and the network. However, the transmission of CSI information essentially requires only clear constraints on the information to be transmitted and the number of bits actually transmitted over the air interface. The artificial segmentation required for compression (e.g., source coding, CSI compression coding) and subsequent expansion (e.g., channel coding) can be avoided. This simplifies CSI encoding (and decoding) schemes. Furthermore, by avoiding artificial segmentation, a coding scheme trained through AI / ML that adaptively balances information compression and channel coding capabilities (and a decoding scheme based on adaptive information recovery and channel decoding capabilities) can be employed to achieve better CSI encoding (and decoding) results.

[0069] FIG5 is a schematic flow chart of a CSI feedback method according to an embodiment of the present application. The method may optionally be applied to the system shown in FIG1 , but is not limited thereto. The method includes:

[0070] S510. The terminal device determines a first CSI feedback mode.

[0071] S520. The terminal device processes the first CSI based on the first CSI feedback method, obtains CSI indication information, and sends the CSI indication information to the network device.

[0072] In the embodiments of the present application, the first CSI may refer to original channel information, such as channel information obtained by a terminal device based on measurement of a reference signal, and may also be referred to as CSI original information, original CSI information, etc.; for example, channel information obtained by a terminal device after processing, feature extraction, and mathematical transformation of channel information obtained based on measurement of a reference signal, such as channel information obtained by performing eigenvector decomposition on a channel, may also be referred to as CSI original information, original CSI information, etc. CSI indication information may refer to CSI coding, such as N-bit coding information (N is a positive integer), and may also be referred to as CSI coding information, CSI coding bits, etc.

[0073] In an embodiment of the present application, the first CSI feedback mode is a CSI feedback mode determined to be used by the terminal device. Optionally, it may be determined by the terminal device from a plurality of optional CSI feedback modes, for example, based on a pre-agreed agreement or configuration or indication. The first CSI feedback mode includes a mode in which the terminal device encodes and / or transmits CSI. Exemplarily, the first CSI feedback mode includes a first type of encoding, which is used to encode the first CSI into CSI indication information.

[0074] It can be understood that the first CSI feedback method determines the process of encoding the first CSI into CSI indication information (for example, whether channel coding is required), and / or the form of expression of the information generated in the process, such as the number of bits contained in the intermediate information, or the number of bits contained in the CSI indication information.

[0075] Corresponding to the above method, FIG6 is a schematic flowchart of a CSI feedback method according to another embodiment of the present application. The method can optionally be applied to the system shown in FIG1 , but is not limited thereto. The method includes:

[0076] S610. The network device determines a first CSI feedback mode.

[0077] S620. The network device receives CSI indication information from the terminal device, and processes the CSI indication information based on a decoding method corresponding to the first CSI feedback method to obtain second CSI.

[0078] In the embodiment of the present application, the second CSI is information obtained (or recovered) by the network device based on decoding of the received CSI indication information. The second CSI may also be referred to as feedback channel information, CSI recovery information, etc.

[0079] In this embodiment of the present application, the decoding method corresponding to the first CSI feedback method is used by the network device to decode the CSI indication information into the second CSI. Specifically, the decoding method determines the process to be followed for decoding the CSI indication information into the second CSI (e.g., whether channel decoding is required) and / or the representation of the information generated in the process (e.g., the number of bits included in the intermediate information).

[0080] Specifically, the first CSI feedback mode may include a first type of encoding, and the decoding mode corresponding to the first CSI feedback mode includes a first type of decoding corresponding to the first type of encoding. For example, if the first type of encoding does not include channel coding, the first type of decoding does not include channel decoding; if the first type of encoding includes AI / ML-based CSI compression encoding and AI / ML-based channel coding, the first type of decoding includes AI / ML-based channel decoding and AI / ML-based CSI compression decoding.

[0081] In some embodiments, the first CSI feedback mode is agreed upon by the terminal device and the network device, or in other words, the first CSI feedback mode is aligned and understood by the terminal device and the network device.

[0082] Figure 7 is an interactive flow chart of an application example of the CSI feedback method in one embodiment of the present application. According to this embodiment of the present application, the terminal device and the network device agree to use a first CSI feedback method. As shown in Figure 7, the terminal device encodes the first CSI information based on the first CSI feedback method to obtain CSI indication information, and transmits the CSI indication information for CSI feedback. The network device decodes the CSI information using a corresponding decoding method to obtain a second CSI. The two ends align the transmission and reception, thereby ensuring the correct transmission and parsing of the CSI indication information.

[0083] In some embodiments, the first CSI feedback method may be implemented using the following method (1) or (2).

[0084] Mode (1): The first CSI feedback mode includes CSI compression coding and / or channel coding.

[0085] CSI compression coding is a coding process used to compress channel information. Channel coding is a coding process that takes into account channel characteristics so that the information to be transmitted can be better received and recognized by the network side.

[0086] According to this approach, the first CSI feedback approach includes independent CSI compression coding and / or independent channel coding. For example, the first CSI feedback approach includes independent CSI compression coding cascaded with independent channel coding.

[0087] Optionally, CSI compression coding can be implemented based on AI / ML, or based on other compression methods, such as codebook implementation.

[0088] Optionally, channel coding can be implemented based on AI / ML, or based on traditional coding methods such as polar code coding and LDPC coding.

[0089] Correspondingly, the decoding mode corresponding to the first CSI feedback mode may include channel decoding and / or CSI compression decoding.

[0090] (2) Joint coding: Joint coding is used to process the first CSI into CSI indication information that does not require channel coding.

[0091] Specifically, joint coding can be used to replace cascaded CSI compression coding and channel coding, that is, to implement joint coding of CSI compression coding and channel coding. In this way, the information after joint coding does not need to be channel coded again.

[0092] Since the transmission of CSI only requires clear constraints on the content of the information to be transmitted and the number of bits actually transmitted on the air interface, as for the number of bits to be compressed first (for example, through source coding and CSI compression coding) and then expanded to a certain number of bits through channel coding, this kind of artificial segmentation operation can be considered to be avoided. Therefore, the use of joint coding can, on the one hand, simplify the CSI encoding (and decoding) scheme. On the other hand, it can avoid artificial information segmentation and adopt a coding scheme that adaptively balances information compression and channel coding capabilities obtained through AI / ML training (based on a decoding scheme that adaptively balances information recovery and channel decoding capabilities) to achieve better CSI encoding (and decoding) results.

[0093] Accordingly, the decoding method corresponding to the first CSI feedback method may include joint decoding, that is, joint decoding of channel decoding and CSI compression decoding, without the need for independent channel decoding.

[0094] In some embodiments, the first CSI feedback mode is configured by the network device or agreed upon by a protocol.

[0095] Figure 8 is an interactive flow chart of another application example of the CSI feedback method according to an embodiment of the present application. As shown in Figure 8 , a network device may send configuration information to a terminal device, where the configuration information indicates the configuration of a first CSI feedback mode. In other words, the terminal device determining the first CSI feedback mode may include: the terminal device receiving the configuration information from the network device, and determining the first CSI feedback mode based on the configuration information.

[0096] Optionally, the configuration information may be carried by one or more of the following messages: (1) broadcast messages, such as MIB, SIB1, SIBx, etc.; (2) RRC messages; (3) MAC CE; (4) DCI messages; (5) downlink messages in the random integration process, such as MsgB, Msg2, Msg4, etc.; (6) PDCCH; (7) PDSCH; (8) AI / ML dedicated downlink channels; (9) capability indication of network equipment.

[0097] Optionally, if the terminal device cannot support the first CSI feedback method, the terminal device may send reporting information to the network device, where the reporting information is used to indicate that the first type of CSI feedback method is not adopted.

[0098] Optionally, if the terminal device cannot support the first CSI feedback method, the terminal device may use the second CSI feedback method. The second CSI feedback method may be a fallback CSI feedback method, such as a non-AI / ML method, or a traditional CSI feedback method (for example, a method based on type1 codebook, type2 codebook, etype2 codebook, and a corresponding channel coding method). Accordingly, upon receiving an indication that the first type of CSI feedback method is not to be used, the network device may also fall back to using the decoding method corresponding to the second CSI feedback method to process the CSI indication information.

[0099] In some embodiments, the CSI feedback method further includes:

[0100] The terminal device sends a first indication information to the network device; wherein the first indication information is used to indicate at least one CSI feedback mode and / or capability information of the terminal device for at least one CIS feedback mode; wherein the at least one CSI feedback mode and / or capability information is used by the network device to determine the first CSI feedback mode.

[0101] Optionally, the capability information of the terminal device for at least one CSI feedback mode may include: for each CSI feedback mode in the at least one CSI feedback mode, whether the terminal device supports the CSI feedback mode, whether the terminal device supports the CSI feedback mode under a specific configuration, or the degree of support of the terminal device for the CSI feedback mode, etc.

[0102] In some embodiments, the at least one CSI feedback method includes at least one of the following:

[0103] The CSI feedback method requested or recommended by the terminal device;

[0104] CSI feedback methods supported by the terminal device;

[0105] The first CSI feedback method.

[0106] Figure 9 is an interactive flow chart of another application example of the CSI feedback method in an embodiment of the present application. As shown in Figure 9, the terminal device can send first indication information to the network device, where the first indication information is used to indicate a CSI feedback method requested / recommended by the terminal device, a CSI feedback method that the terminal device can adopt (support), or capability information of the terminal device for the first CSI feedback method.

[0107] Accordingly, in some embodiments, before the network device processes the CSI indication information based on the decoding mode corresponding to the first CSI feedback mode, the CSI feedback method further includes:

[0108] The network device receives first indication information from the terminal device; wherein the first indication information is used to indicate at least one CSI feedback mode and / or capability information of the terminal device for at least one CSI feedback mode; wherein the at least one CSI feedback mode and / or capability information is used by the network device to determine the first CSI feedback mode.

[0109] That is, the network device determines the first CSI feedback mode, including: the network device determines the first CSI feedback mode according to at least one CSI feedback mode and / or capability information indicated by the first indication information.

[0110] According to the above embodiment, the network device can determine the first CSI feedback mode based on at least one CSI feedback mode indicated by the terminal device and / or the capability information for at least one CSI feedback mode, and then configure the first CSI feedback mode for the terminal device, and / or use the first CSI feedback mode to process the received CSI indication information.

[0111] Figure 10 is an interactive flow chart of another application example of the CSI feedback method in an embodiment of the present application. As shown in Figure 10, the terminal device sends first indication information to the network device, where the first indication information is used to indicate the CSI feedback method requested / recommended by the terminal device, or the CSI feedback method that the terminal device can adopt (support), or the capability information of the terminal device for the first CSI feedback method; the network device configures the first CSI feedback method based on the first indication information.

[0112] In one embodiment, the terminal device configures the first CSI feedback mode. Specifically, the first indication information can be used to indicate the first CSI feedback mode, and the network device can determine the first CSI feedback mode based on the first indication information, thereby using the corresponding decoding mode to process the received CSI indication information.

[0113] In another embodiment, the first indication information can be used to indicate the capability information of the terminal device for the first CSI feedback method. The network device configures the terminal device to use the first CSI feedback method based on the capability information and uses the corresponding decoding method to process the received CSI indication information.

[0114] In another embodiment, the first indication information can be used to indicate the CSI feedback method requested or recommended by the terminal device, and / or the capability information of the terminal device regarding the CSI feedback method requested or recommended by the terminal device. The network device can refer to the first indication information to determine the first CSI feedback method, and then configure the first CSI feedback method for the terminal device, and use the corresponding decoding method to process the received CSI indication information.

[0115] In another embodiment, the first indication information can be used to indicate one or more CSI feedback modes supported by the terminal device. The network device can determine the first CSI feedback mode from the one or more CSI feedback modes supported by the terminal device, and then configure the first CSI feedback mode for the terminal device, and use the corresponding decoding method to process the received CSI indication information.

[0116] Optionally, the first indication information may be carried by one or more of the following messages: (1) RRC message; (2) UCI ​​message; (3) uplink message in the random integration process, such as MsgA, Msg3, etc.; (4) PUCCH; (5) PUSCH; (6) AI / ML dedicated uplink channel; (7) UE capability reporting.

[0117] According to the foregoing description, it can be understood that the first CSI feedback mode can be one of multiple different types of CSI feedback modes; the one or more encoding processes included in the first CSI feedback mode can also be one of multiple different types of encoding processes (for example, based on AI / ML or based on traditional methods). In addition, the determination of the first CSI feedback mode is related to the transmission of CSI indication information and the information type. Based on this, the first CSI feedback mode can be configured or indicated based on one or more contents. The following exemplifies the content that can be configured or indicated in the process of protocol agreement, network configuration, or terminal indication.

[0118] In some embodiments, the first CSI feedback mode is configured / indicated based on at least one of the following information A to D. In other words, determining the first CSI feedback mode includes determining at least one of the following information A to D.

[0119] A. Parameter configuration of the first CSI feedback method.

[0120] Exemplarily, the parameter configuration of the first CSI feedback mode includes at least one of the following:

[0121] (a) Identifier (ID) of the CSI coding type of the first CSI feedback mode.

[0122] Here, the ID of the CSI coding type refers to the ID of the overall coding process in the first CSI feedback mode. The ID of the CSI coding type can be the ID of a specific type of CSI coding function, or the ID of a model or algorithm for implementing a specific type of CSI coding.

[0123] Specifically, different CSI coding functions may correspond to different type IDs. For example, joint coding corresponds to type ID 0, and compression coding and channel coding concatenation corresponds to type ID 1. For another example, AI-based joint coding corresponds to type ID 00, AI-based compression coding and AI-based channel coding concatenation corresponds to type ID 01, and traditional compression coding and traditional channel coding concatenation corresponds to type ID 10.

[0124] Optionally, an M-bit binary number or an N-bit decimal number may be used as the ID of the CSI coding type, where M and N are positive integers.

[0125] (b) Target compression bits of the first CSI feedback method.

[0126] Optionally, the target compression bits are the number of bits contained in the information encoded and output based on the first CSI feedback mode. For example, if the first CSI is encoded based on the first CSI feedback mode, and the information obtained is a K-bit binary number (K ​​is a positive integer), then the target compression bits are K.

[0127] (c) CSI coding compression ratio of the first CSI feedback method.

[0128] Optionally, the CSI coding compression rate is a ratio of the size of information encoded based on the first CSI feedback mode to the size of original CSI information.

[0129] (d) Channel information used to transmit CSI indication information.

[0130] Optionally, the channel information used to transmit the CSI indication information may include PUCCH or PUSCH, etc., that is, the channel information is used to indicate whether the CSI indication information is transmitted in PUCCH or PUSCH.

[0131] (e) Resources used to transmit CSI indication information.

[0132] Optionally, the resource may refer to a PUCCH or PUSCH transmission resource required for CSI indication information, such as a time domain, frequency domain, or code domain resource.

[0133] (f) Resource mapping method for transmitting CSI indication information.

[0134] Optionally, the resource may refer to a resource mapping mode of PUCCH or PUSCH transmission resources required for CSI indication information.

[0135] B.CSI encoding type.

[0136] Optionally, the CSI coding type in the information B may refer to type information of one or more coding processes in the first CSI feedback mode.

[0137] In some embodiments, the CSI encoding type includes at least one of the following:

[0138] (a) Type of CSI compression coding and / or type of channel coding.

[0139] Optionally, the CSI coding type may include a channel coding type, such as whether channel coding is present or the channel coding method. The channel coding method may be polar coding, LDPC coding, or an AI / ML-based method or a traditional method. Optionally, the channel coding type may be indicated by a function ID or a model ID.

[0140] Optionally, the CSI coding type may include a compression coding type and a channel coding type. For example, the compression coding type of the CSI information may be indicated by a function ID or a model ID, and the channel coding type of the CSI information may be indicated by a function ID or a model ID.

[0141] (b) Type of joint coding; wherein the joint coding is used to process the first CSI into CSI indication information that does not require channel coding.

[0142] Specifically, joint coding may refer to joint coding of CSI compression and channel coding.

[0143] Optionally, the type of joint coding may include whether joint coding is used, whether a specific joint coding method is used (e.g., AI / ML-based joint coding), or a specific joint coding method. Optionally, the type of joint coding may also be indicated by a function ID or a model ID.

[0144] (c) CSI coding type corresponding to one or more compression bits.

[0145] Here, compression bits refer to the number of bits of information output by the CSI encoding. The CSI encoding type corresponding to one or more compression bits can be understood as the CSI encoding type corresponding to a specific compression bit. For example, different CSI encoding types correspond to 8 and 10 compression bits.

[0146] Optionally, the CSI coding type corresponding to a specific compression bit may be indicated by a function ID or a model ID.

[0147] (d) CSI coding type corresponding to one or more compressed bits that does not require channel coding.

[0148] For example, multiple functions / models for joint coding may be pre-configured, and different compression bits may correspond to different functions / models. Optionally, the CSI coding type for a specific compression bit may be indicated by a function ID or a model ID, and it may be indicated that no channel coding is required.

[0149] (e) second indication information; wherein the second indication information is used to indicate that channel coding is not required.

[0150] Optionally, the second indication information may be a specific function ID or model ID. When the configuration information or indication information of the first CSI feedback mode includes the second indication information, the terminal device may determine that it is not necessary to perform channel coding on the CSI indication information, and the network device does not need to perform channel decoding on the CSI indication information.

[0151] C.CSI indicates the transmission type of information;

[0152] In some embodiments, the transmission type of the CSI indication information includes at least one of the following:

[0153] (a) Channel coding type of UCI used to transmit CSI indication information.

[0154] For example, the UCI does not require channel coding (correspondingly, the network device does not need to perform channel decoding on the UCI), or the UCI adopts a specific type of channel coding method (correspondingly, the network device adopts a corresponding channel decoding method).

[0155] (b) Whether the UCI used to transmit CSI indication information includes other information in addition to the CSI indication information.

[0156] For example, the CSI indication information may share a UCI with other information, or be carried by a separate UCI. Sharing a UCI with other information and being carried by a separate UCI belong to different transmission types and may be represented by different IDs.

[0157] (c) Channel coding type of the PUSCH used to transmit CSI indication information.

[0158] For example, the PUSCH does not require channel coding, or the PUSCH uses a specific type of channel coding.

[0159] D.CSI information type.

[0160] In some embodiments, the CSI information type includes at least one of the following:

[0161] (a) Feedback accuracy of CSI indication information;

[0162] (b) The size of the feedback overhead of the CSI indication information; for example, the size of the number of bits of feedback;

[0163] (c) Time domain configuration requirements for CSI indication information; for example, periodic configuration, semi-static configuration, triggered configuration, etc.;

[0164] (d) Latency requirements for CSI indication information.

[0165] It can be understood that the above-mentioned CSI information type results in different transmission requirements for the CSI indication information to be transmitted. Therefore, different CSI information types can correspond to different CSI feedback modes, that is, the CSI feedback mode can be determined based on the CSI information type, and the configuration / indication of the first CSI feedback mode can be implemented by indicating the CSI information type.

[0166] In some embodiments, the CSI information type is used to determine at least one of the parameter configuration of the first CSI feedback method, the CSI coding type, and the transmission type of the CSI indication information. For example, channel coding is not used for the first type of CSI information, while joint coding of CSI information compression and channel coding is used for the second type of CSI information.

[0167] Exemplarily, the channel coding type may be determined based on the feedback overhead size. For example, when the feedback overhead size is greater than the first reference bit number, joint coding of CSI information compression and channel coding is adopted (correspondingly, joint decoding is adopted at the receiving end). For example, when the feedback overhead size is greater than the second reference bit number, channel coding is not adopted (correspondingly, channel decoding is not adopted at the receiving end). For example, when the feedback overhead size is less than the third reference bit number, joint coding of CSI information compression and channel coding is adopted (correspondingly, joint decoding is adopted at the receiving end). For example, when the feedback overhead size is less than the fourth reference bit number, channel coding is not adopted (correspondingly, channel decoding is not adopted at the receiving end). For example, when the feedback overhead size is equal to the fifth reference bit number, joint coding of CSI information compression and channel coding is adopted (correspondingly, joint decoding is adopted at the receiving end). For example, when the feedback overhead size is equal to the sixth reference bit number, channel coding is not adopted (correspondingly, channel decoding is not adopted at the receiving end). All or part of the first reference bit number, the second reference bit number, the third reference bit number, the fourth reference bit number, the fifth reference bit number, and the sixth reference bit number may be the same or different.

[0168] It should be noted that the above content provides an example of determining the channel coding type based on the feedback overhead size. Optionally, the parameter configuration of the first CSI feedback mode, the CSI coding type, and other information in the transmission type of the CSI indication information can also be determined based on the feedback overhead size, or based on other information in the CSI information type (such as feedback accuracy, time domain configuration requirements, delay requirements, etc.) to determine the parameter configuration of the first CSI feedback mode, the CSI coding type, and other information in the transmission type of the CSI indication information. In actual applications, the above information can be arbitrarily combined according to scenario requirements, system conventions, network configurations, etc., and this application is not limited to this. In addition, the configuration content of the first CSI feedback mode can also be implemented based on one or more of the above information A to D. Each of the information A to D can also include one or more of the information. This application is not limited, and can be implemented according to scenario requirements, system conventions, network configurations, etc.

[0169] It can be seen that the embodiment of the present application provides a specific solution for determining the CSI feedback method, which is mainly used to align the understanding of transmission and reception. The embodiment of the present application can be applied to scenarios where the system supports multiple CSI feedback methods, such as scenarios that support joint coding and traditional CSI feedback. In this scenario, it is necessary to consider CSI feedback as a dual-end processing solution, and the terminal device and the network device need to maintain a consistent understanding of the processing behavior of the CSI information. That is to say, if one end performs joint coding on the CSI information regarding information compression and channel adaptation, the other end also needs to adopt a corresponding decoding solution; for example, if one end does not perform independent channel coding on the CSI information, the other end does not need to perform independent channel decoding on the received CSI information, otherwise it will cause erroneous reception of the CSI information due to inconsistent dual-end understanding of the coding and decoding scheme. In response to the above problems, in the CSI feedback method of the embodiment of the present application, the network device and the terminal device ensure consistent understanding of the first CSI feedback method through necessary agreements, configurations, instructions, and request information, thereby ensuring correct feedback of the CSI.

[0170] FIG11 is a schematic block diagram of a terminal device 1100 according to an embodiment of the present application. The terminal device 1100 may include:

[0171] A first processing module 1110 is configured to determine a first CSI feedback mode, and process the first CSI based on the first CSI feedback mode to obtain CSI indication information;

[0172] The first communication module 1120 is configured to send CSI indication information to the network device.

[0173] In some embodiments, the first CSI feedback method is agreed upon with the network device.

[0174] Exemplarily, the first CSI may include channel information obtained by the terminal device based on the measurement of the reference signal, or channel information obtained by the terminal device after processing, feature extraction, and mathematical transformation of the channel information obtained based on the measurement of the reference signal, or channel information obtained by the terminal device by performing eigenvector decomposition on the channel, which may also be referred to as CSI original information, original CSI information, etc.

[0175] In some embodiments, the first CSI feedback mode is configured by the network device.

[0176] In some embodiments, the first communication module 1110 is further configured to:

[0177] Sending first indication information to the network device; wherein the first indication information is used to indicate at least one CSI feedback mode and / or capability information of the terminal device for at least one CSI feedback mode; wherein the at least one CSI feedback mode and / or capability information is used by the network device to determine the first CSI feedback mode.

[0178] In some embodiments, the at least one CSI feedback mode includes at least one of the following: a CSI feedback mode requested or recommended by the terminal device; a CSI feedback mode supported by the terminal device; and a first CSI feedback mode.

[0179] In some embodiments, the first CSI feedback method is agreed upon by a protocol.

[0180] In some embodiments, the first CSI feedback mode is configured based on at least one of the following: parameter configuration of the first CSI feedback mode; CSI coding type; transmission type of CSI indication information; CSI information type.

[0181] In some embodiments, the parameter configuration of the first CSI feedback mode includes at least one of the following: an identifier of the CSI coding type of the first CSI feedback mode; a target compression bit of the first CSI feedback mode; a CSI coding compression rate of the first CSI feedback mode; channel information used to transmit CSI indication information; resources used to transmit CSI indication information; and a resource mapping method used to transmit CSI indication information.

[0182] In some embodiments, the CSI encoding type includes at least one of the following:

[0183] Type of CSI compression coding and / or type of channel coding;

[0184] The type of joint coding; wherein the joint coding is used to process the first CSI into CSI indication information that does not require channel coding;

[0185] The CSI coding type corresponding to one or more compression bits;

[0186] CSI coding type corresponding to one or more compressed bits that does not require channel coding;

[0187] Second indication information; wherein the second indication information is used to indicate that channel coding is not required.

[0188] In some embodiments, the transmission type of the CSI indication information includes at least one of the following: the channel coding type of the uplink control information UCI used to transmit the CSI indication information; whether the UCI includes other information in addition to the CSI indication information; and the channel coding type of the physical uplink shared channel PUSCH used to transmit the CSI indication information.

[0189] In some embodiments, the CSI information type includes at least one of the following: feedback accuracy of CSI indication information; feedback overhead size of CSI indication information; time domain configuration requirement of CSI indication information; and delay requirement of CSI indication information.

[0190] In some embodiments, the CSI information type is used to determine at least one of a parameter configuration of a first CSI feedback mode, a CSI encoding type, and a transmission type of CSI indication information.

[0191] In some embodiments, the first CSI feedback method includes:

[0192] CSI compression coding and / or channel coding;

[0193] or,

[0194] Joint coding: Joint coding is used to process the first CSI into CSI indication information that does not require channel coding.

[0195] The terminal device 1100 of the embodiment of the present application can implement the corresponding functions of the terminal device in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the terminal device 1100 can be found in the corresponding descriptions in the above-mentioned method embodiments, which will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the terminal device 1100 of the embodiment of the application can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0196] FIG12 is a schematic block diagram of a network device 1200 according to an embodiment of the present application. The network device 1200 may include:

[0197] The second communication module 1210 is configured to receive CSI indication information from a terminal device;

[0198] The second processing module 1220 is configured to determine a first CSI feedback mode, and process the CSI indication information based on a decoding mode corresponding to the first CSI feedback mode to obtain a second CSI.

[0199] In some embodiments, the first CSI feedback mode is configured by the network device.

[0200] In some embodiments, the second communication module 1220 is further configured to:

[0201] Receive first indication information from a terminal device; wherein the first indication information is used to indicate at least one CSI feedback mode and / or capability information of the terminal device for at least one CSI feedback mode; wherein the at least one CSI feedback mode and / or capability information is used by the network device to determine the first CSI feedback mode.

[0202] In some embodiments, the at least one CSI feedback mode includes at least one of the following: a CSI feedback mode requested or recommended by the terminal device; a CSI feedback mode supported by the terminal device; and a first CSI feedback mode.

[0203] In some embodiments, the first CSI feedback method is agreed upon by a protocol.

[0204] In some embodiments, the first CSI feedback mode is configured based on at least one of the following: parameter configuration of the first CSI feedback mode; CSI coding type; transmission type of CSI indication information; CSI information type.

[0205] In some embodiments, the parameter configuration of the first CSI feedback mode includes at least one of the following: an identifier of the CSI coding type of the first CSI feedback mode; a target compression bit of the first CSI feedback mode; a CSI coding compression rate of the first CSI feedback mode; channel information used to transmit CSI indication information; resources used to transmit CSI indication information; and a resource mapping method used to transmit CSI indication information.

[0206] In some embodiments, the CSI encoding type includes at least one of the following:

[0207] Type of CSI compression coding and / or type of channel coding;

[0208] The type of joint coding; wherein the joint coding is used to process the original CSI information into CSI indication information that does not require channel coding;

[0209] The CSI coding type corresponding to one or more compression bits;

[0210] CSI coding type corresponding to one or more compressed bits that does not require channel coding;

[0211] Second indication information; wherein the second indication information is used to indicate that channel coding is not required.

[0212] In some embodiments, the transmission type of the CSI indication information includes at least one of the following: the channel coding type of the UCI used to transmit the CSI indication information; whether the UCI includes other information in addition to the CSI indication information; and the channel coding type of the PUSCH used to transmit the CSI indication information.

[0213] In some embodiments, the CSI information type includes at least one of the following: feedback accuracy of CSI indication information; feedback overhead size of CSI indication information; time domain configuration requirement of CSI indication information; and delay requirement of CSI indication information.

[0214] In some embodiments, the CSI information type is used to determine at least one of parameter configuration of the first CSI feedback mode, the CSI coding type, and the transmission type of the CSI indication information. For example, the feedback overhead size can be used to determine the channel coding type.

[0215] In some embodiments, the first CSI feedback method includes:

[0216] CSI compression coding and / or channel coding;

[0217] or,

[0218] Joint coding: Joint coding is used to process the original CSI information into CSI indication information that does not require channel coding.

[0219] The network device 1200 of the embodiment of the present application can implement the corresponding functions of the network device in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to each module (sub-module, unit or component, etc.) in the network device 1200 can be found in the corresponding description in the above method embodiment, and will not be repeated here. It should be noted that the functions described in the various modules (sub-module, unit or component, etc.) in the network device 1200 of the embodiment of the application can be implemented by different modules (sub-module, unit or component, etc.) or by the same module (sub-module, unit or component, etc.).

[0220] Figure 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application. The communication device 1300 includes a processor 1310, which can call and execute a computer program from a memory to enable the communication device 1300 to implement the method in the embodiment of the present application.

[0221] In one embodiment, the communication device 1300 may further include a memory 1320. The processor 1310 may call and execute a computer program from the memory 1320 to enable the communication device 1300 to implement the method in the embodiment of the present application.

[0222] The memory 1320 may be a separate device independent of the processor 1310 , or may be integrated into the processor 1310 .

[0223] In one embodiment, the communication device 1300 may further include a transceiver 1330 , and the processor 1310 may control the transceiver 1330 to communicate with other devices. Specifically, the transceiver 1330 may send information or data to other devices, or receive information or data sent by other devices.

[0224] The transceiver 1330 may include a transmitter and a receiver. The transceiver 1330 may further include an antenna, and the number of antennas may be one or more.

[0225] In one embodiment, the communication device 1300 may be a network device of an embodiment of the present application, and the communication device 1300 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0226] In one embodiment, the communication device 1300 may be a terminal device of an embodiment of the present application, and the communication device 1300 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0227] 14 is a schematic structural diagram of a chip 1400 according to an embodiment of the present application. The chip 1400 includes a processor 1410, which can call and execute a computer program from a memory to implement the method according to the embodiment of the present application.

[0228] In one embodiment, the chip 1400 may further include a memory 1420. The processor 1410 may call and execute a computer program from the memory 1420 to implement the method executed by the terminal device or the network device in the embodiment of the present application.

[0229] The memory 1420 may be a separate device independent of the processor 1410 , or may be integrated into the processor 1410 .

[0230] In one embodiment, the chip 1400 may further include an input interface 1430. The processor 1410 may control the input interface 1430 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0231] In one embodiment, the chip 1400 may further include an output interface 1440. The processor 1410 may control the output interface 1440 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0232] In one embodiment, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0233] In one embodiment, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0234] The chips used in the network device and the terminal device may be the same chip or different chips.

[0235] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0236] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0237] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM).

[0238] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0239] FIG15 is a schematic block diagram of a communication system 1500 according to an embodiment of the present application. The communication system 1500 includes a terminal device 1100 and a network device 1200 .

[0240] The terminal device 1100 is used to determine a first CSI feedback method, process the first CSI based on the first CSI feedback method, obtain CSI indication information, and send the CSI indication information to the network device.

[0241] The network device 1200 is used to receive CSI indication information from the terminal device, and process the CSI indication information based on a decoding method corresponding to the first CSI feedback method to obtain a second CSI.

[0242] The terminal device 1100 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1200 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not described here in detail.

[0243] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function in accordance with the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0244] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0245] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0246] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for channel state information (CSI) feedback, comprising: The terminal device determines a first CSI feedback manner; The terminal device processes the first CSI based on the first CSI feedback manner to obtain CSI indication information, and sends the CSI indication information to the network device.

2. The method according to claim 1, wherein The first CSI feedback manner is configured by the network device.

3. The method according to claim 1 or 2, wherein, The method further comprises: The terminal device sends first indication information to the network device; wherein, the first indication information is used to indicate at least one CSI feedback manner and / or the capability information of the terminal device for at least one CIS feedback manner; wherein, the at least one CSI feedback manner and / or the capability information are used by the network device to determine the first CSI feedback manner.

4. The method according to claim 3, wherein, The at least one CSI feedback manner includes at least one of the following: The CSI feedback manner requested or recommended by the terminal device; The CSI feedback manner supported by the terminal device; The first CSI feedback manner.

5. The method according to claim 1, wherein The first CSI feedback manner is agreed upon by the protocol.

6. The method according to any one of claims 1-5, wherein, The first CSI feedback manner is configured based on at least one of the following: The parameter configuration of the first CSI feedback manner; The CSI coding type; The transmission type of the CSI indication information; The CSI information type.

7. The method according to claim 6, wherein, The parameter configuration of the first CSI feedback manner includes at least one of the following: The identifier of the CSI coding type of the first CSI feedback manner; The target compressed bits of the first CSI feedback manner; The CSI coding compression ratio of the first CSI feedback manner; The channel information for transmitting the CSI indication information; The resource for transmitting the CSI indication information; The resource mapping manner for transmitting the CSI indication information.

8. The method according to claim 6 or 7, wherein The CSI coding type includes at least one of the following: The type of CSI compression coding and / or the type of channel coding; The type of joint coding; wherein, the joint coding is used to process the first CSI into CSI indication information that does not require channel coding; The CSI coding type corresponding to one or more compressed bits; The CSI coding type without channel coding corresponding to one or more compressed bits; Second indication information; wherein, the second indication information is used to indicate that no channel coding is required.

9. The method according to any one of claims 6 - 8, wherein The transmission type of the CSI indication information includes at least one of the following: The channel coding type of the uplink control information (UCI) for transmitting the CSI indication information; Whether the UCI includes other information except the CSI indication information; The channel coding type of the physical uplink shared channel (PUSCH) for transmitting the CSI indication information.

10. The method according to any one of claims 6-9, wherein, The CSI information type includes at least one of the following: The feedback accuracy of the CSI indication information; The feedback overhead size of the CSI indication information; The time domain configuration requirement of the CSI indication information; The latency requirement of the CSI indication information.

11. The method according to any one of claims 6-10, wherein, The CSI information type is used to determine at least one of the parameter configuration of the first CSI feedback manner, the CSI coding type, and the transmission type of the CSI indication information.

12. The method according to any one of claims 1-11, wherein, The first CSI feedback manner includes: CSI compression coding and / or channel coding; Or, Joint coding; the joint coding is used to process the first CSI into CSI indication information that does not require channel coding.

13. A CSI feedback method, comprising: A network device determines a first CSI feedback manner; The network device receives CSI indication information from a terminal device, and processes the CSI indication information based on a decoding manner corresponding to the first CSI feedback manner to obtain a second CSI.

14. The method according to claim 13, wherein, The first CSI feedback manner is configured by the network device.

15. The method according to claim 13 or 14, wherein, The method further comprises: The network device receives first indication information from the terminal device; wherein, the first indication information is used to indicate at least one CSI feedback manner and / or the capability information of the terminal device for at least one CIS feedback manner; wherein, the at least one CSI feedback manner and / or the capability information are used for the network device to determine the first CSI feedback manner.

16. The method according to claim 15, wherein, The at least one CSI feedback manner includes at least one of the following: The CSI feedback manner requested or recommended by the terminal device; The CSI feedback manner supported by the terminal device; The first CSI feedback manner.

17. The method according to claim 13, wherein, The first CSI feedback manner is agreed upon by the protocol.

18. The method according to any one of claims 13-17, wherein The first CSI feedback manner is configured based on at least one of the following: The parameter configuration of the first CSI feedback manner; The CSI coding type; The transmission type of the CSI indication information; The CSI information type.

19. The method according to claim 18, wherein, The parameter configuration of the first CSI feedback manner includes at least one of the following: The identifier of the CSI coding type of the first CSI feedback manner; The target compression bits of the first CSI feedback manner; The CSI coding compression ratio of the first CSI feedback manner; The channel information for transmitting the CSI indication information; The resource for transmitting the CSI indication information; The resource mapping manner for transmitting the CSI indication information.

20. The method according to claim 18 or 19, wherein The CSI coding type includes at least one of the following: The type of CSI compression coding and / or the type of channel coding; The type of joint coding; wherein, the joint coding is used to process the CSI original information into CSI indication information that does not require channel coding; The CSI coding type corresponding to one or more compression bits; The CSI coding type without channel coding corresponding to one or more compression bits; The second indication information; wherein, the second indication information is used to indicate no need for channel coding. The transmission type of the CSI indication information includes at least one of the following:

21. The method according to any one of claims 18 - 20, wherein, The channel coding type of the UCI for transmitting the CSI indication information; Whether the UCI includes other information except the CSI indication information; The channel coding type of the PUSCH for transmitting the CSI indication information. The CSI information type includes at least one of the following:

22. The method according to any one of claims 18 - 21, wherein, The feedback accuracy of the CSI indication information; The feedback overhead size of the CSI indication information; The time domain configuration requirement of the CSI indication information; The delay requirement of the CSI indication information. The CSI information type includes at least one of the following:

23. The method according to any one of claims 18 - 22, wherein, The CSI information type is used to determine at least one of the parameter configuration of the first CSI feedback manner, the CSI coding type, and the transmission type of the CSI indication information.

24. The method according to any one of claims 13-23, wherein, The first CSI feedback manner includes: CSI compression coding and / or channel coding; Or, Joint coding; the joint coding is used to process the CSI original information into CSI indication information that does not require channel coding.

25. A terminal device, comprising: A first processing module, configured to determine a first CSI feedback manner and process the first CSI based on the first CSI feedback manner to obtain CSI indication information; A first communication module, configured to send the CSI indication information to a network device.

26. The terminal device according to claim 25, wherein, The first CSI feedback manner is configured by the network device.

27. The terminal device according to claim 25 or 26, wherein The first communication module is further configured to: Send first indication information to the network device; wherein, the first indication information is used to indicate at least one CSI feedback manner and / or the capability information of the terminal device for at least one CIS feedback manner; wherein, the at least one CSI feedback manner and / or the capability information are used by the network device to determine the first CSI feedback manner.

28. The terminal device according to claim 27, wherein, The at least one CSI feedback manner includes at least one of the following: The CSI feedback manner requested or recommended by the terminal device; The CSI feedback manner supported by the terminal device; The first CSI feedback manner.

29. The terminal device according to claim 25, wherein, The first CSI feedback manner is agreed upon by the protocol.

30. The terminal device according to any one of claims 25-29, wherein, The first CSI feedback manner is configured based on at least one of the following: The parameter configuration of the first CSI feedback manner; The CSI coding type; The transmission type of the CSI indication information; The CSI information type.

31. The terminal device according to claim 30, wherein, The parameter configuration of the first CSI feedback manner includes at least one of the following: The identifier of the CSI coding type of the first CSI feedback manner; The target compression bits of the first CSI feedback manner; The CSI coding compression ratio of the first CSI feedback manner; The channel information for transmitting the CSI indication information; The resource for transmitting the CSI indication information; The resource mapping manner for transmitting the CSI indication information.

32. The terminal device according to claim 30 or 31, wherein, The CSI coding type includes at least one of the following: The type of CSI compression coding and / or the type of channel coding; The type of joint coding; wherein, the joint coding is used to process the first CSI into CSI indication information that does not require channel coding; The CSI coding type corresponding to one or more compression bits; The CSI coding type without channel coding corresponding to one or more compression bits; Second indication information; wherein, the second indication information is used to indicate no need for channel coding.

33. The terminal device according to any one of claims 30 - 32, wherein, The transmission type of the CSI indication information includes at least one of the following: The channel coding type of the uplink control information UCI for transmitting the CSI indication information; Whether the UCI includes other information except the CSI indication information; The channel coding type of the physical uplink shared channel PUSCH for transmitting the CSI indication information.

34. The terminal device according to any one of claims 30-33, wherein, The CSI information type includes at least one of the following: The feedback accuracy of the CSI indication information; The feedback overhead size of the CSI indication information; The time-domain configuration requirements of the CSI indication information; The latency requirements of the CSI indication information.

35. The terminal device according to any one of claims 30-34, wherein, The CSI information type is used to determine at least one of the parameter configuration of the first CSI feedback method, the CSI coding type, and the transmission type of the CSI indication information.

36. The terminal device according to any one of claims 25-35, wherein, The first CSI feedback method includes: CSI compression coding and / or channel coding; Or, Joint coding; the joint coding is used to process the first CSI into CSI indication information that does not require channel coding.

37. A network device, comprising: A second communication module, configured to receive CSI indication information from a terminal device; A second processing module, configured to determine a first CSI feedback method, and process the CSI indication information based on the decoding method corresponding to the first CSI feedback method to obtain a second CSI.

38. The network device according to claim 37, wherein, The first CSI feedback method is configured by the network device.

39. The network device according to claim 37 or 38, wherein, The second communication module is further configured to: Receive first indication information from the terminal device; wherein, the first indication information is used to indicate at least one CSI feedback method and / or the capability information of the terminal device for at least one CIS feedback method; wherein, the at least one CSI feedback method and / or the capability information are used by the network device to determine the first CSI feedback method.

40. The network device according to claim 39, wherein, The at least one CSI feedback method includes at least one of the following: The CSI feedback method requested or recommended by the terminal device; The CSI feedback method supported by the terminal device; The first CSI feedback method.

41. The network device according to claim 37, wherein, The first CSI feedback method is agreed upon by the protocol.

42. The network device according to any one of claims 37-41, wherein, The first CSI feedback method is configured based on at least one of the following: The parameter configuration of the first CSI feedback method; The CSI coding type; The transmission type of the CSI indication information; The CSI information type.

43. The network device according to claim 42, wherein, The parameter configuration of the first CSI feedback method includes at least one of the following: The identifier of the CSI coding type of the first CSI feedback method; The target compression bits of the first CSI feedback method; The CSI coding compression ratio of the first CSI feedback method; The channel information for transmitting the CSI indication information; The resources for transmitting the CSI indication information; The resource mapping method for transmitting the CSI indication information.

44. The network device according to claim 42 or 43, wherein, The CSI coding type includes at least one of the following: The type of CSI compression coding and / or the type of channel coding; The type of joint coding; wherein, the joint coding is used to process the CSI raw information into CSI indication information that does not require channel coding; The CSI coding type corresponding to one or more compression bits; The CSI coding type that does not require channel coding corresponding to one or more compression bits; Second indication information; wherein, the second indication information is used to indicate that channel coding is not required.

45. The network device according to any one of claims 42-44, wherein, The transmission type of the CSI indication information includes at least one of the following: The channel coding type of the UCI for transmitting the CSI indication information; Whether the UCI includes other information in addition to the CSI indication information; The channel coding type of the PUSCH for transmitting the CSI indication information.

46. The network device according to any one of claims 42-45, wherein, The CSI information type includes at least one of the following: The feedback accuracy of the CSI indication information; The feedback overhead size of the CSI indication information; The time-domain configuration requirements of the CSI indication information; The latency requirements of the CSI indication information.

47. The network device according to any one of claims 42-46, wherein, The CSI information type is used to determine at least one of the parameter configuration of the first CSI feedback method, the CSI coding type, and the transmission type of the CSI indication information.

48. The network device according to any one of claims 37-47, wherein, The first CSI feedback method includes: CSI compression coding and / or channel coding; Or, Joint coding; the joint coding is used to process the CSI raw information into CSI indication information that does not require channel coding.

49. A terminal device, comprising: A transceiver, a processor, and a memory. The memory is used to store a computer program. The transceiver is used to communicate with other devices. The processor is used to call and run the computer program stored in the memory, so that the terminal device determines the first CSI feedback method, processes the first CSI based on the first CSI feedback method to obtain CSI indication information, and sends the CSI indication information to the network device.

50. The terminal device according to claim 49, wherein, The first CSI feedback method is configured by the network device.

51. The terminal device according to claim 49 or 50, wherein The processor is further used to cause the terminal device to send first indication information to the network device; wherein, the first indication information is used to indicate at least one CSI feedback method and / or the capability information of the terminal device for at least one CIS feedback method; wherein, the at least one CSI feedback method and / or the capability information are used by the network device to determine the first CSI feedback method.

52. The terminal device according to claim 51, wherein, The at least one CSI feedback method includes at least one of the following: The CSI feedback method requested or recommended by the terminal device; The CSI feedback method supported by the terminal device; The first CSI feedback method.

53. The terminal device according to claim 49, wherein, The first CSI feedback method is agreed upon by the protocol.

54. The terminal device according to any one of claims 49-53, wherein, The first CSI feedback method is configured based on at least one of the following: The parameter configuration of the first CSI feedback method; The CSI coding type; The transmission type of the CSI indication information; The CSI information type.

55. The terminal device according to claim 54, wherein, The parameter configuration of the first CSI feedback method includes at least one of the following: The identifier of the CSI coding type of the first CSI feedback method; The target compression bits of the first CSI feedback method; The CSI coding compression ratio of the first CSI feedback method; The channel information for transmitting the CSI indication information; The resources for transmitting the CSI indication information; The resource mapping method for transmitting the CSI indication information.

56. The terminal device according to claim 54 or 55, wherein, The CSI coding type includes at least one of the following: The type of CSI compression coding and / or the type of channel coding; The type of joint coding; wherein, the joint coding is used to process the first CSI into CSI indication information that does not require channel coding; The CSI coding type corresponding to one or more compression bits; CSI coding type that does not require channel coding corresponding to one or more compressed bits; Second indication information; wherein, the second indication information is used to indicate that channel coding is not required.

57. The terminal device according to any one of claims 54-56, wherein, The transmission type of the CSI indication information includes at least one of the following: Channel coding type of the uplink control information UCI used to transmit the CSI indication information; Whether the UCI includes other information in addition to the CSI indication information; Channel coding type of the physical uplink shared channel PUSCH used to transmit the CSI indication information.

58. The terminal device according to any one of claims 54-57, wherein, The CSI information type includes at least one of the following: Feedback accuracy of the CSI indication information; Feedback overhead size of the CSI indication information; Time domain configuration requirements of the CSI indication information; Delay requirements of the CSI indication information.

59. The terminal device according to any one of claims 54-58, wherein, The CSI information type is used to determine at least one of the parameter configuration of the first CSI feedback manner, the CSI coding type, and the transmission type of the CSI indication information.

60. The terminal device according to any one of claims 49-59, wherein, The first CSI feedback manner includes: CSI compression coding and / or channel coding; Or, Joint coding; the joint coding is used to process the first CSI into CSI indication information that does not require channel coding.

61. A network device, comprising: A transceiver, a processor, and a memory, the memory is used to store a computer program, the transceiver is used to communicate with other devices, and the processor is used to call and run the computer program stored in the memory, so that the network device determines the first CSI feedback manner, receives the CSI indication information from the terminal device, and processes the CSI indication information based on the decoding manner corresponding to the first CSI feedback manner to obtain a second CSI.

62. The network device according to claim 61, wherein, The first CSI feedback manner is configured by the network device.

63. The network device according to claim 61 or 62, wherein, The processor is further used to enable the network device to receive first indication information from the terminal device; wherein, the first indication information is used to indicate at least one CSI feedback manner and / or the capability information of the terminal device for at least one CIS feedback manner; wherein, the at least one CSI feedback manner and / or the capability information are used by the network device to determine the first CSI feedback manner.

64. The network device according to claim 63, wherein, The at least one CSI feedback manner includes at least one of the following: The CSI feedback manner requested or recommended by the terminal device; The CSI feedback manner supported by the terminal device; The first CSI feedback manner.

65. The network device according to claim 61, wherein, The first CSI feedback manner is agreed upon by the protocol.

66. The network device according to any one of claims 61-65, wherein, The first CSI feedback manner is configured based on at least one of the following: Parameter configuration of the first CSI feedback manner; CSI coding type; Transmission type of the CSI indication information; CSI information type.

67. The network device according to claim 66, wherein, The parameter configuration of the first CSI feedback manner includes at least one of the following: Identifier of the CSI coding type of the first CSI feedback manner; Target compressed bits of the first CSI feedback manner; CSI coding compression ratio of the first CSI feedback manner; Channel information used to transmit the CSI indication information; Resources used to transmit the CSI indication information; Resource mapping method for transmitting CSI indication information.

68. The network device according to claim 66 or 67, wherein, The CSI coding type includes at least one of the following: Type of CSI compression coding and / or type of channel coding; Type of joint coding; wherein the joint coding is used to process CSI original information into CSI indication information that does not require channel coding; CSI coding type corresponding to one or more compression bits; CSI coding type corresponding to one or more compression bits that does not require channel coding; Second indication information; wherein the second indication information is used to indicate that channel coding is not required.

69. The network device according to any one of claims 66 - 68, wherein, The transmission type of the CSI indication information includes at least one of the following: Channel coding type of UCI for transmitting the CSI indication information; Whether the UCI includes other information other than the CSI indication information; Channel coding type of PUSCH for transmitting the CSI indication information.

70. The network device according to any one of claims 66 - 69, wherein, The CSI information type includes at least one of the following: Feedback accuracy of the CSI indication information; Feedback overhead size of the CSI indication information; Time domain configuration requirements of the CSI indication information; Delay requirements of the CSI indication information.

71. The network device according to any one of claims 66 - 70, wherein, The CSI information type is used to determine at least one of the parameter configuration of the first CSI feedback method, the CSI coding type, and the transmission type of the CSI indication information.

72. The network device according to any one of claims 61-71, wherein, The first CSI feedback method includes: CSI compression coding and / or channel coding; Or, Joint coding; the joint coding is used to process CSI original information into CSI indication information that does not require channel coding.

73. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 12.

74. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 13 to 24.

75. A computer-readable storage medium, configured to store a computer program, which when run by a device causes the device to execute the method according to any one of claims 1 to 12.

76. A computer-readable storage medium, configured to store a computer program, which when run by a device causes the device to execute the method according to any one of claims 13 to 24.

77. A computer program product, including computer program instructions, which cause a computer to execute the method according to any one of claims 1 to 12.

78. A computer program product, including computer program instructions, which cause a computer to execute the method according to any one of claims 13 to 24.

79. A computer program, which causes a computer to execute the method according to any one of claims 1 to 12.

80. A computer program, which causes a computer to execute the method according to any one of claims 13 to 24.

81. A communication system, including: A terminal device, configured to execute the method according to any one of claims 1 to 12; A network device for performing the method according to any one of claims 13 to 24.

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