WO2024078440A1

WO2024078440A1 - Information feedback method and apparatus, terminal, network side device, and readable storage medium

Info

Publication number: WO2024078440A1
Application number: PCT/CN2023/123510
Authority: WO
Inventors: 袁江伟; 吴昊; 宋扬; 王臣玺
Original assignee: 维沃移动通信有限公司
Priority date: 2022-10-11
Filing date: 2023-10-09
Publication date: 2024-04-18
Also published as: CN117914366A

Abstract

The present application discloses an information feedback method and apparatus, a terminal, a network side device, and a readable storage medium, and belongs to the technical field of communications. The information feedback method of the embodiments of the present application comprises: a terminal sending a channel state information (CSI) report, the CSI report comprising a predicted precoding matrix indicator (PMI), and the CSI report being used for the explicit or implicit feedback of the level of confidence of the predicted PMI.

Description

Information feedback method, device, terminal, network side equipment and readable storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202211244245.X filed in China on October 11, 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present application belongs to the field of communication technology, and specifically relates to an information feedback method, apparatus, terminal, network-side equipment and readable storage medium.

Background technique

In the Channel State Information (CSI) feedback, the terminal may feedback the precoding matrix indicator (PMI) of a certain time domain unit or multiple time domain units in the future. The typical solution is that the network configures the terminal to feedback the PMI of which time domain unit or which time domain units in the future. In this case, since the accuracy of the terminal's derivation of the PMI of the future time domain unit will decrease as the number of time domain units increases, and the specific upper limit of the time domain unit is related to factors such as the terminal's computing power, the terminal's mobile speed, and the algorithm used by the terminal, it may cause a large gap between the future PMI fed back by the terminal and the future actual PMI, thereby affecting the network configuration.

Summary of the invention

The embodiments of the present application provide an information feedback method, apparatus, terminal, network-side device and readable storage medium, which can solve the problem that the future PMI fed back by the current terminal is significantly different from the actual future PMI, thus affecting the network configuration.

In a first aspect, an information feedback method is provided, the method comprising:

The terminal sends a CSI report, where the CSI report includes the predicted PMI, and the CSI report is used to explicitly or implicitly feed back the confidence of the predicted PMI.

In a second aspect, an information feedback method is provided, the method comprising:

The network side device receives a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback a confidence level of the predicted PMI;

The network side device determines the confidence of the predicted PMI according to the CSI report.

In a third aspect, an information feedback device is provided, comprising:

The first sending module is used to send a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feed back a confidence level of the predicted PMI.

In a fourth aspect, an information feedback device is provided, comprising:

A second receiving module, configured to receive a CSI report, wherein the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback a confidence level of the predicted PMI;

A determination module is used to determine the confidence of the predicted PMI according to the CSI report.

In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to send a CSI report, wherein the CSI report comprises a predicted PMI, and wherein the CSI report is used to explicitly or implicitly feedback a confidence level of the predicted PMI.

In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the communication interface is used to receive a CSI report, the CSI report comprising a predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI; the processor is used to determine the confidence of the predicted PMI based on the CSI report.

In a ninth aspect, a communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the information feedback method as described in the first aspect, and the network side device can be used to execute the steps of the information feedback method as described in the second aspect.

In the tenth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

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

In an embodiment of the present application, by sending a CSI report, the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI, so that the terminal can feedback the confidence of the predicted PMI when feeding back the predicted PMI, thereby effectively guiding the network to dynamically adjust the configuration based on the fed-back PMI, avoiding invalid terminal calculations and a decrease in user experience rate due to inappropriate configuration.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

FIG2 is a flow chart of an information feedback method provided in an embodiment of the present application;

FIG3 is a flow chart of an information feedback method provided in an embodiment of the present application;

FIG4 is a schematic diagram of the structure of an information feedback device provided in an embodiment of the present application;

FIG5 is a schematic diagram of the structure of another information feedback device provided in an embodiment of the present application;

FIG6 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

FIG7 is a schematic diagram of the structure of a terminal provided in an embodiment of the present application;

FIG8 is a schematic diagram of the structure of a network side device provided in an embodiment of the present application.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and/or" in the specification and claims represents at least one of the connected objects, and the character "/" generally represents that the objects associated with each other are in an "or" relationship.

It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE)/LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as for other systems and radio technologies. The following description describes a new radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the ^6th Generation (6G) communication system.

FIG1 shows a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (Vehicle User Equipment, VUE), a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (personal computer, PC), a teller machine or a self-service machine and other terminal side devices, and the wearable device includes: a smart watch, a smart bracelet, a smart headset, a smart glasses, a smart jewelry (smart bracelet, a smart bracelet, a smart ring, a smart Necklace, smart anklet, smart anklet, etc.), smart wristband, smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a wireless access network device, a wireless access network (Radio Access Network, RAN), a wireless access network function or a wireless access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home B node, a home evolved B node, a transmission reception point (Transmission Reception Point, TRP) or some other appropriate term in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, it should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

In order to facilitate understanding of the embodiments of the present application, the following contents are first described.

In the embodiment of the present application, if the network configures the terminal to feed back PMIs of multiple time domain units in the future, the PMIs of the multiple time domain units may be compressed in the Doppler domain or may not be compressed in the Doppler domain.

In an embodiment of the present application, for the channel state information (CSI) measurement resource configuration, the terminal can use the channel state information reference signal (Channel State Information Reference Signal, CSI-RS) of multiple time domain units configured by the network to obtain the time domain characteristics of the channel.

In the embodiment of the present application, the CSI report consists of two parts, and the first part (Part 1) has a fixed payload size and is used to identify the number of information bits in the second part (Part 2). The first part should be fully delivered before the second part.

For Type I CSI feedback, the first part may include Rank Indicator (RI), Channel State Information-Reference Signal Resource Indicator (CSI-RS resource indicator, CRI) and Channel Quality Indicator (CQI). The second part includes PMI, Layer Indicator (LI), and when RI is greater than 4, it includes the CQI of the second codeword.

For Type II CSI feedback, Part 1 may contain RI, CQI, and an indication of the number of non-zero wideband amplitude coefficients per layer of CSI. Part 2 contains PMI and LI.

For enhanced Type II CSI feedback and further enhanced Type II port select CSI feedback, Part 1 may contain an indication of the total number of RI, CQI, and non-zero amplitude coefficients across layers. Part 2 contains the PMI of the enhanced Type II or further enhanced Type II port select CSI.

For enhanced II CSI feedback, CSI report Part 2 is further divided into three parameter groups, namely Group 0, Group 1, and Group 2. Group 0 includes the strongest coefficient indication in the spatial domain beam indication field; Group 1 includes frequency domain basis vector indication, the high priority part of non-zero coefficient indication, the amplitude and phase indication of high priority coefficients, and the amplitude coefficient indication between polarizations; Group 2 includes the low priority part of non-zero coefficients, as well as the amplitude and phase indication of low priority coefficients.

In the embodiment of the present application, a time domain unit is a unit in time. For example, a time domain unit may include a time slot, a symbol, multiple symbols, multiple time slots, etc.

The information feedback method provided in the embodiment of the present application is described below through some embodiments and their application scenarios in conjunction with the accompanying drawings. The device, terminal, network-side equipment and readable storage medium are described in detail.

Please refer to FIG. 2, which is a flow chart of an information feedback method provided in an embodiment of the present application. The method is executed by a terminal. As shown in FIG. 2, the method includes the following steps:

Step 21: The terminal sends a CSI report, where the CSI report includes the predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI.

Here, the terminal sends a CSI report to the network side device. The above confidence level may be a quantitative value, etc., which is used to characterize the credibility of the corresponding PMI.

In some embodiments, the confidence level of the predicted PMI may be explicitly fed back in the CSI report carrying the predicted PMI.

In some other embodiments, the confidence level of the predicted PMI may be implicitly fed back in the CSI report carrying the predicted PMI.

The information feedback method of the embodiment of the present application, by sending a CSI report, wherein the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI, so that the terminal can feedback the confidence of the predicted PMI when feeding back the predicted PMI, thereby effectively guiding the network to dynamically adjust the configuration based on the fed-back PMI, avoiding invalid calculation of the terminal and a decrease in the user experience rate due to inappropriate configuration.

In the embodiment of the present application, whether to explicitly or implicitly feed back the confidence of the predicted PMI in the CSI report can be indicated by network signaling, or can be determined by the terminal, or can be triggered by an event. If the terminal decides whether to feed back the confidence, the terminal needs to indicate it to the network through signaling or CSI report content.

In another implementation, the confidence of the predicted PMI explicitly or implicitly fed back in the CSI report may be the confidence of the PMI in the current CSI report, or the confidence of the PMI in the CSI report that has been fed back. In this case, the definition of the confidence, the correspondence between the confidence and the PMI, or the method for obtaining the correspondence are the same as those in this embodiment.

In the embodiment of the present application, the confidence of the predicted PMI may be explicitly fed back in different ways. When the CSI report explicitly feeds back the confidence of the predicted PMI, the CSI report may include first indication information, where the first indication information is used to indicate at least one of the following:

1) The confidence of the PMI corresponding to at least one predicted time domain unit.

Here, the predicted PMI corresponding to at least one time domain unit may be the PMI of one time domain unit, or may be multiple PMIs corresponding to multiple time domain units.

Optionally, the mapping priority of the above confidence level may satisfy at least one of the following: higher than the mapping priority of the subband PMI information; higher than the mapping priority of the PMI combination coefficient. The mapping priority of the above confidence level may be understood as the priority of the confidence level mapped in the first indication information. For example, the above confidence level may be in CSI part 1, or in the broadband information part of CSI part 2 or Group 0.

In some embodiments, the time domain unit predicted in 1) may be a time domain unit configured by the network to be fed back by the terminal, or a time domain unit selected by the terminal to be fed back.

2) The confidence of the PMI of each time-domain unit in the predicted at least one time-domain unit.

Optionally, the mapping priority of the above confidence level may satisfy at least one of the following: higher than the mapping priority of the subband PMI information; higher than the mapping priority of the PMI combination coefficient. For example, the above confidence level may be in CSI part 1, and also It can be in the broadband information part of CSI part2 or Group0.

Optionally, when the first indication information indicates the confidence of the PMI of each time domain unit in the predicted multiple time domain units, the mapping order of the confidence is consistent with the order of the corresponding time domain units. The order is, for example, from small to large, that is, the first confidence corresponds to the smallest time domain unit associated with the PMI, the second confidence corresponds to the second largest time domain unit associated with the PMI, and so on, and the last confidence corresponds to the largest time domain unit associated with the PMI.

Optionally, when the first indication information indicates the confidence of the PMI of each of the predicted multiple time domain units, differential coding can be used between the confidences of the PMI of each time domain unit to save signaling. For example, starting from the confidence of the second time domain unit, the difference between the confidence of the second time domain unit and the confidence of the previous time domain unit can be fed back for each time domain unit, or the difference between the confidence of the first time domain unit and the confidence of the first time domain unit can be fed back for each time domain unit.

In some embodiments, the time domain unit predicted in 2) may be a time domain unit configured by the network to be fed back by the terminal, or a time domain unit selected by the terminal to be fed back.

3) The confidence of the PMI corresponding to each time-domain unit group in the at least one predicted time-domain unit group.

Optionally, the mapping priority of the above confidence level may satisfy at least one of the following: higher than the mapping priority of subband PMI information; higher than the mapping priority of PMI combination coefficient. For example, the above confidence level may be in CSI part 1, or in the broadband information part of CSI part 2 or Group 0.

In some embodiments, the time domain unit predicted in 3) may be a time domain unit configured by the network to be fed back by the terminal, or a time domain unit selected by the terminal to be fed back.

In some embodiments, the terminal may group multiple time domain units according to a default rule or network configuration, and then for each time domain unit group, the terminal explicitly feeds back the corresponding confidence level.

Optionally, when the first indication information indicates the confidence of the PMI corresponding to each of the predicted multiple time domain unit groups, the mapping order of the confidence is consistent with the order of the corresponding time domain unit groups. The order is, for example, from small to large, that is, the first confidence corresponds to the first time domain unit group associated with the PMI, the second confidence corresponds to the second time domain unit group associated with the PMI, and so on, and the last confidence corresponds to the last time domain unit group associated with the PMI.

Optionally, when the first indication information indicates the confidence of the PMI corresponding to each of the predicted multiple time domain unit groups, differential coding can be used between the confidences of the PMIs corresponding to each time domain unit group to save signaling. For example, starting from the confidence of the second time domain unit group, the difference between the confidence of the second time domain unit group and the confidence of the previous time domain unit group can be fed back for each time domain unit group, or the difference between the confidence of the first time domain unit group and the confidence of the first time domain unit group can be fed back for each time domain unit group.

In an embodiment of the present application, for the terminal to obtain the confidence of the PMI, the network may need to send some specific reference signals for the terminal to obtain the confidence of the PMI. For one or more specific reference signals, it can be a periodic, non-periodic, or semi-continuous reference signal. Further, the network can instruct the terminal or the terminal to carry the confidence of the corresponding PMI in the next feedback CSI report after completing the measurement of the corresponding reference signal by default.

In the embodiment of the present application, the future time domain units effectively predicted by the terminal may be less than the time domain units configured by the network. When the first indication information indicates the confidence of the PMI of each time domain unit in the predicted at least one time domain unit, if the network configures the terminal to feedback the PMI of the future N time domain units, where N is an integer greater than 1, the first indication information The information may indicate at least one of the following:

The confidence of the PMI of each time domain unit in the N time domain units;

The confidence of the PMI of each time domain unit in the M time domain units; wherein, the M is greater than or equal to 1 and less than N, and the M time domain units are time domain units whose PMI is lower than a first threshold value among the N time domain units, or the M time domain units are time domain units whose PMI is higher than a second threshold value among the N time domain units.

Optionally, the first threshold value and/or the second threshold value mentioned above may be agreed upon in a protocol, predefined or configured in a network, or may be implemented by a terminal.

In some embodiments, the mapping priority of the confidence of the PMI of each of the M time domain units, that is, the mapping priority of the M confidences corresponding to the M time domain units, may satisfy at least one of the following: higher than the mapping priority of the subband PMI information; higher than the mapping priority of the PMI combination coefficient. At this time, the M confidences may be in CSI part 1, or in the broadband information part of CSI part 2 or Group 0.

In some embodiments, the mapping order of the confidence of the PMI of each time domain unit in the above-mentioned M time domain units is consistent with the order of the corresponding time domain unit group, and the order is, for example, from small to large.

In the embodiment of the present application, the above confidence level may be a quantized value, and the quantized value may satisfy any of the following conditions:

The quantization value is greater than or equal to 0 and less than or equal to 1, and the smaller the quantization value is, the lower or higher the confidence level is; that is, the quantization value is associated with a value between 0 and 1;

The quantized value is greater than or equal to the third threshold value and less than or equal to 1, and the smaller the quantized value is, the lower or higher the confidence is; that is, the quantized value is associated with a value between the third threshold value and 1; the third threshold value may be agreed upon by the protocol, predefined or configured by the network, or may be implemented by the terminal;

The quantized value is greater than or equal to 0 and less than or equal to a fourth threshold value, and the smaller the quantized value is, the lower or higher the confidence is; that is, the quantized value is associated with a value between 0 and the fourth threshold value; the fourth threshold value may be agreed upon by the protocol, predefined or configured by the network, or may be implemented by the terminal;

The quantization value is equal to 0 or 1, wherein 0 represents that the confidence level is unreliable, and 1 represents that the confidence level is reliable; or, 0 represents that the confidence level is reliable, and 1 represents that the confidence level is unreliable.

In this way, the confidence of the explicit feedback can be quantified, thereby reducing the feedback overhead as well as the payload of the CSI report.

It should be noted that, in addition to explicitly feeding back the confidence, in this embodiment, the confidence may also be implicitly fed back by means of feeding back the PMI, as described below.

Optionally, when the network configures the terminal to feed back the PMI of future n time domain units, where n is an integer greater than 1, the CSI report sent by the terminal may satisfy at least one of the following:

(1) The CSI report includes PMIs of m1 time domain units, where the m1 time domain units are time domain units among the n time domain units, and m1 is less than or equal to n. The CSI report implicitly indicates that the confidence of the PMIs of the m1 time domain units is credible.

Here, the terminal may feed back the PMI of m1 time domain units among the n time domain units according to actual conditions, that is, feed back the PMI of each time domain unit among the m1 time domain units. The PMI of the first m1 time domain units among the m1 time domain units.

In some embodiments, the above m1 time domain units are implemented by the terminal, that is, the terminal determines the m1 time domain units that can be predicted based on a comprehensive consideration of factors such as prediction capability or algorithm. For the PMIs of the m1 time domain units, the network can consider the confidence of these PMIs to be credible; and for the PMIs of the time domain units that are configured by the network but not fed back by the terminal, the network can consider the confidence of these PMIs to be unreliable.

In some embodiments, whether the terminal can feedback the PMI of the time domain units with a number less than the number configured by the network can be configured by the network or activated by the network. The terminal can receive first configuration information or activation signaling from a network side device, wherein the first configuration information is used to configure whether the terminal can feedback the PMI of the time domain units with a number smaller than the number n, and the activation signaling is used to activate the terminal to feedback the PMI of the time domain units with a number smaller than the number n.

In some embodiments, the value of m1 needs to be fed back to the network by the terminal, and the CSI report may include second indication information, and the second indication information is used to explicitly or implicitly indicate the value of m1. For example, the second indication information is carried in CSI Part 1, that is, the value of m1 is fed back through CSI Part 1. The explicit indication means that the network can directly obtain the value of m1, and the implicit indication means that the network can indirectly obtain the value of m1 through the second indication information.

In some embodiments, the network needs to allocate feedback resources according to the PMI of n time domain units fed back by the terminal. The terminal can receive second configuration information from the network side device, and the second configuration information is used to configure feedback resources for the terminal, and the feedback resources are configured according to the PMI of n time domain units fed back by the terminal.

(2) The CSI report includes PMIs of m2 time domain units, the first time domain unit of the m2 time domain units is a time domain unit among the n time domain units, the m2 is less than or equal to the n, and the CSI report implicitly indicates that the confidence of the PMI of the m2 time domain units is credible.

Here, the terminal can feed back the PMI of m2 time domain units among the n time domain units according to actual conditions, that is, feed back the PMI of each time domain unit among the m2 time domain units. Further, the terminal can feed back the PMI of the first m2 time domain units among the n time domain units according to actual conditions.

Here, the first time domain unit among the m2 time domain units can be understood as the smallest time domain unit among the m2 time domain units. When the first time domain unit among the m2 time domain units is one of the n time domain units, the remaining time domain units among the m2 time domain units may be time domain units among the n time domain units, or may not be time domain units among the n time domain units.

In some embodiments, the m2 time domain units are implemented by the terminal, that is, the terminal determines the m2 time domain units that can be predicted based on a comprehensive consideration of factors such as prediction capability or algorithm. For the PMIs of the m2 time domain units, the network can consider the confidence of these PMIs to be credible; and for the PMIs of the time domain units that are configured by the network but not fed back by the terminal, the network can consider the confidence of these PMIs to be unreliable.

In some embodiments, the first time domain unit among the m2 time domain units is the first time domain unit among the n time domain units, that is, the smallest time domain unit among the m2 time domain units is the smallest time domain unit among the n time domain units, so as to facilitate indicating the m2 time domain units to the network.

In some embodiments, the m2 time domain units need to be indicated to the network. The first time domain unit is the first time domain unit among the n time domain units, and the CSI report may include third indication information, and the third indication information is used to indicate the offset value (offset) of each time domain unit in the m2 time domain units except the first time domain unit compared with the first time domain unit, that is, it is only necessary to indicate the offset of each time domain unit in the m2-1 time domain units compared with the minimum time domain unit among the n time domain units. Alternatively, if the first time domain unit among the m2 time domain units is not the first time domain unit among the n time domain units, the CSI report may include fourth indication information, and the fourth indication information is used to indicate the offset value of the first time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units, and the offset value of each time domain unit among the other time domain units except the first time domain unit among the m2 time domain units compared to the first time domain unit; or, the fourth indication information is used to indicate the offset value of each time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units, that is, it is only necessary to indicate to the network the offset of each time domain unit among the m2-1 time domain units (except the first time domain unit) compared to the minimum time domain unit among the n time domain units.

In some embodiments, the time domain interval between the m2 time domain units is related to the first time domain interval, for example, the time domain interval between the m2 time domain units is limited to the first time domain interval. The first time domain interval may be agreed upon by the protocol, predefined or configured by the network, or may be implemented by the terminal. For example, the network configures the terminal to feedback the PMI of future slot n+4, slot n+8, slot n+12 and slot n+16, and configures the terminal to select the slot for feedback PMI, and configures the terminal to select the minimum slot interval for feedback PMI as 2. Then, the terminal may feedback the PMI of the three time domain units of slot n+4, slot n+6 and slot n+8, or feedback the PMI of the four time domain units of slot n+4, slot n+6, slot n+8 and slot n+10, wherein the slot interval is 2.

(3) The CSI report includes PMIs of m3 time domain units, the m3 time domain units have no identical time domain units with the n time domain units, the m3 is less than or equal to the n, and the CSI report implicitly indicates that the confidence of the PMIs of the m3 time domain units is credible.

Here, the terminal may feed back the PMI of each time domain unit in the m3 time domain units according to actual conditions, and the m3 time domain units are not time domain units in the n time domain units.

In some embodiments, the m3 time domain units are implemented by the terminal, that is, the terminal determines the m3 time domain units that can be predicted based on a comprehensive consideration of factors such as prediction capability or algorithm. For the PMIs of the m3 time domain units, the network can consider the confidence of these PMIs to be credible; and for the PMIs of the time domain units that are configured by the network but not fed back by the terminal, the network can consider the confidence of these PMIs to be unreliable.

In some embodiments, the m3 time domain units need to be indicated to the network, and the CSI report may include a fifth indicator The fifth indication information is used to indicate an offset value of each of the m3 time domain units compared to any one of the following: a time domain unit for feeding back the CSI report, a time domain unit where a reference resource is located, and a time domain unit for measuring a resource (such as a CSI-RS, etc.). For example, the time domain unit for feeding back the CSI report may be a CSI report feedback time domain unit indicated by the network.

In this way, with the help of the above (1) to (3), it is possible to avoid the situation where the feedback PMI is significantly different from the actual future PMI (i.e., the confidence level is low) when the terminal strictly feeds back the PMI according to the network configuration, thereby avoiding useless calculation of the terminal and a decrease in the user experience rate.

Optionally, when the network configures the terminal to feed back the PMI of a time domain units within the first time window, the CSI report may include the PMI of b time domain units within the first time window, and the CSI report implicitly indicates that the confidence of the time domain units after the first time domain unit within the first time window is unreliable, and the first time domain unit is the last time domain unit among the b time domain units; a is an integer greater than 1, and b is less than or equal to a.

Here, the first time window may be selected as one time window. The terminal may feed back the PMIs of b time domain units within the first time window according to actual conditions.

In some embodiments, the above-mentioned b time domain units are implemented by the terminal, that is, the terminal determines the b time domain units that can be predicted based on a comprehensive consideration of factors such as prediction capability or algorithm. For the PMIs of the b time domain units, the network can consider the confidence of these PMIs to be credible; and for the PMIs of the time domain units that are configured by the network but not fed back by the terminal, the network can consider the confidence of these PMIs to be unreliable, for example, the confidence of the time domain units after the last time domain unit in the b time domain units can be considered to be unreliable.

In some embodiments, the b time domain units need to be indicated to the network, and the CSI report may include sixth indication information, and the sixth indication information is used to indicate the offset value (offset) of each time domain unit in the b time domain units compared to the starting position of the first time window. Thus, with the help of the offset value from the starting position of the first time window, the time domain unit for feedback PMI can be simply indicated.

In some embodiments, it can be restricted that the first time domain unit of the feedback PMI must be the starting position of the time window, that is, the first time domain unit of the b time domain units is located at the starting position of the first time window. At this time, the CSI report may include seventh indication information, and the seventh indication information is used to indicate the offset value of each time domain unit in the b time domain units except the first time domain unit compared to the starting position of the first time window, that is, it is only necessary to indicate to the network the offset value offset of each time domain unit in the b-1 time domain units (except the first time domain unit) compared to the starting position of the first time window.

In some embodiments, the time domain interval between the b time domain units is related to the second time domain interval, for example, the time domain interval between the b time domain units is limited by the second time domain interval. The second time domain interval may be agreed upon by the protocol, predefined or configured by the network, or may be implemented by the terminal. For example, the network configures the terminal to feedback the PMI of three time domain units (slots) in the future slot n to slot n+16, and at the same time configures the terminal to select the minimum slot interval for feedback of PMI as 2, then the terminal can feedback the PMI of the three time domain units of slot n+4, slot n+6 and slot n+8 (whose slot interval is 2), or, can feedback the PMI of the three time domain units of slot n, slot n+4 and slot n+8 (whose slot interval is 4). For another example, the network configures the terminal to feedback the PMI of a maximum of three time domain units (slots) in the future slot n to slot n+16, At the same time, the terminal is configured to select the minimum slot interval of feedback PMI as 2, then the terminal can feedback the PMI of the two time domain units slot n+4 and slot n+6 (whose slot interval is 2), or it can feedback the PMI of the three time domain units slot n, slot n+4 and slot n+8 (whose slot interval is 4).

The present application is described below in conjunction with specific embodiments.

Embodiment 1:

Assume that the network configures the terminal to feedback the PMI of the four future slots slot n+4, slot n+6, slot n+8 and slot n+10, where slot n indicates the downlink slot associated with the uplink slot reported by the network-instructed terminal feedback CSI, then: the terminal can predict the channels of the four slots slot n+4, slot n+6, slot n+8 and slot n+10 according to the configured reference signal resources, and obtain the corresponding PMI. At the same time, the terminal can feedback the confidence of the PMI corresponding to these multiple time domain units (slots), which can be a value from 0 to 1. For example, if 0.8 is fed back, it means that the feedback PMI has a high credibility. In addition, the confidence can also be 0 or 1, where 0 means unreliable and 1 means feasible. After the network receives the confidence level of this feedback, it can make appropriate configuration adjustments. For example, when the confidence level is high, the terminal can be configured to predict a PMI greater than slot n+10. If the confidence level is low, the network can configure the terminal to reduce the predicted slots or predict a slot closer to slot n (for example: slot n, slot n+2, slot n+4, slot n+6).

Embodiment 2:

Assume that the network configures the terminal to feedback the PMIs of the four future slots, slot n+4, slot n+6, slot n+8, and slot n+10, where slot n represents the downlink slot associated with the uplink slot of the CSI report that the network instructs the terminal to feedback. Then: the terminal can predict the channels of the four slots, slot n+4, slot n+6, slot n+8, and slot n+10, based on the configured reference signal resources, and obtain the corresponding PMI. At the same time, the terminal can feedback the confidence of the PMI of each time domain unit (slot), and the confidence can be a value from 0 to 1. For example, feedback of 0.8, 0.6, 0.4, and 0.2 indicates that the credibility of the PMI associated with slot n+4 is higher, and the credibility of the PMI associated with slot n+10 is lower. The confidence can also be 0 or 1, where 0 means untrustworthy and 1 means trustworthy. For example, if the feedback is 1100, it means that the PMI associated with slot n+4 and slot n+6 is trustworthy, and the PMI associated with slot n+8 and slot n+10 is untrustworthy. After receiving the confidence feedback, the network can make appropriate configuration adjustments. For example, the network can configure the terminal to reduce the predicted slots (for example, only predict slot n+4, slot n+6), or configure the terminal to predict a slot closer to slot n (for example, predict: slot n, slot n+2, slot n+4, slot n+6).

Embodiment three:

Assume that the network configures the terminal to feedback the PMIs of the four future slots, slot n+4, slot n+6, slot n+8, and slot n+10, and configures a confidence threshold of 0.5, where slot n represents the downlink slot associated with the uplink slot of the CSI report that the network instructs the terminal to feedback. Then: the terminal can predict the channels of the four slots, slot n+4, slot n+6, slot n+8, and slot n+10, based on the configured reference signal resources, and obtain the corresponding PMIs. At the same time, the terminal can calculate the confidence of the PMI of each slot according to the default rule. The confidence can be a value from 0 to 1. For example, the confidence of the PMI of the four slots is calculated to be 0.8, 0.6, 0.4, and 0.2. Then, according to the configured confidence threshold of "0.5", the terminal feeds back the PMIs associated with slot n+4, slot n+6, slot n+8, and slot n+10. At the same time, the terminal can feed back the PMIs of slot n+8 and slot n+10 that are less than the threshold value "0.5". The confidence level of the PMI of slot n+10 is fed back in the order of slot n+8, slot n+10; or, the terminal can feed back the confidence level of the PMI of slot n+4 and slot n+6 that is greater than the threshold value "0.5", and the feedback order is slot n+4, slot n+6. The network receives this feedback After obtaining the confidence and the fed-back PMI, appropriate configuration adjustments can be made. For example, the network can configure the terminal to reduce the predicted slots (for example, only predict slot n+4 and slot n+6), or configure the terminal to predict a slot closer to slot n (for example, predict: slot n, slot n+2, slot n+4, and slot n+6).

Embodiment 4:

Assume that the network configures the terminal to feedback the PMI of the four future slots, slot n+4, slot n+6, slot n+8 and slot n+10, and configures the terminal to select M (less than 4) slots from which the PMI feedback confidence is obtained, where slot n represents the downlink slot associated with the uplink slot of the CSI report that the network instructs the terminal to feedback. Then: the terminal can predict the channels of the four slots, slot n+4, slot n+6, slot n+8 and slot n+10, based on the configured reference signal resources, and obtain the corresponding PMI. At the same time, the terminal can judge the credibility of the PMI of these four time domain unit slots based on its own implementation. For example, the credibility of the PMI associated with slot n+8 and slot n+10 is low. At this time, the terminal can only feedback the PMI of slot n+4 and slot n+6. At the same time, the terminal also needs to feedback the value of "2" to the network, and the network can determine that the credibility of the PMI of slot n+4 and slot n+6 is high based on the feedback information.

Embodiment five:

Assume that the network configures the terminal to feedback the PMI of the four future slots slot n+4, slot n+8, slot n+12 and slot n+16, and configures the terminal to select M (less than 4) slots for PMI feedback, where slot n represents the downlink slot associated with the uplink slot of the CSI report that the network instructs the terminal to feedback. Then: the terminal can predict the channels of the four slots slot n+4, slot n+8, slot n+12 and slot n+16 based on the configured reference signal resources, and obtain Take the corresponding PMI, and the terminal can judge the credibility of the PMI of the four time domain units slot according to its own implementation. For example, the credibility of the PMI associated with slot n+12 and slot n+16 is low. At this time, the terminal can predict the channel of the slot n+6 time domain unit according to its own ability. At this time, the terminal only feeds back the PMI of slot n+4, slot n+6 and slot n+8. At the same time, the terminal needs to indicate slot n+6 and slot n+8 to the network, for example, the difference with slot n+4 can be indicated, that is, 2 and 4. After decoding, the network can obtain the PMI feedback from the terminal associated with the three slots of slot n+4, slot n+6 and slot n+8, and the credibility is relatively high.

Embodiment six:

Assume that the network configures the terminal to feedback the PMI of the four future slots, slot n+4, slot n+8, slot n+12, and slot n+16, and configures the terminal to freely select the PMI feedback of M (less than 4) time domain units, where slot n represents the downlink slot associated with the uplink slot of the CSI report that the network instructs the terminal to feedback. Then: the terminal can predict the four slots, slot n+4, slot n+8, slot n+12, and slot n+16, based on the configured reference signal resources. The terminal can determine the credibility of the PMI of the four time domain units according to its own implementation. Assuming that the credibility of the PMI associated with slot n+8, slot n+12, and slot n+16 is low, the terminal can predict the channels of the time domain units of slot n, slot n+2, slot n+4, and slot n+6 according to its own capabilities. If the credibility is high, the terminal only feeds back the PMI of slot n, slot n+2, slot n+4, and slot n+6. At the same time, the terminal needs to indicate slot n, slot n+2, slot n+4, and slot n+6 to the network, for example, the difference with slot n can be indicated respectively, that is, 0, 2, 4, and 6. After decoding, the network can obtain the PMI feedback from the terminal associated with the four slots of slot n, slot n+2, slot n+4, and slot n+6, and the credibility is high.

Embodiment seven:

The time window that can be configured for network configuration can be configured in the high-level signaling CodebookConfig, or Configured in a newly defined high-level signaling, the high-level signaling is used to indicate the terminal prediction parameters. Similarly, for the network configuration of the terminal to feedback the PMI of the future N time domain units, the network can configure a value of N in the high-level signaling, or configure specific N time domain units. For the configuration of specific N time domain units, the value of each time domain unit can be an offset value, which can be relative to the last symbol or the last time slot of the DCI that triggers the PMI feedback, or it can be relative to a valid downlink time slot associated with the uplink time slot of the feedback CSI report indicated by the network, or it can be relative to the CSI reference time slot (reference resource).

For the network configuration that the terminal feeds back the PMI of the future N time domain units, the terminal may feed back the PMI of M time domain units according to actual conditions, and the network may indicate one of multiple modes through high-layer signaling, where the multiple modes may include but are not limited to:

Mode 1: The minimum time domain unit among the M time domain units is the minimum time domain unit of the N time domain units;

Mode 2: The M time domain units may not be the time domain units in the N time domain units;

Mode 3: The minimum time domain unit among the M time domain units is any time domain unit among the N time domain units.

Please refer to FIG. 3, which is a flow chart of an information feedback method provided in an embodiment of the present application. The method is applied to a network side device. As shown in FIG. 3, the method includes the following steps:

Step 31: The network side device receives a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI;

Step 32: The network-side device determines the confidence level of the predicted PMI based on the CSI report.

Here, the above confidence level may be selected as a quantitative value, etc., which is used to characterize the credibility of the corresponding PMI.

The information feedback method of the embodiment of the present application, by receiving a CSI report, wherein the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI, can enable the terminal to feedback the confidence of the predicted PMI when feeding back the predicted PMI, thereby effectively guiding the network to dynamically adjust the configuration based on the fed-back PMI, avoiding invalid calculation of the terminal and a decrease in the user experience rate due to inappropriate configuration.

In the embodiment of the present application, the confidence of the predicted PMI can be explicitly fed back in different ways. When the CSI report explicitly feeds back the confidence of the predicted PMI, the CSI report includes first indication information, and the first indication information is used to indicate at least one of the following:

A confidence level of a PMI corresponding to at least one predicted time domain unit;

a confidence level of the predicted PMI for each time-domain unit in at least one time-domain unit;

A confidence level of the PMI corresponding to each time-domain unit group in the at least one predicted time-domain unit group.

Optionally, when the first indication information indicates the confidence of the PMI of each time domain unit in the predicted at least one time domain unit, if the network configures the terminal to feedback the PMI of the future N time domain units, and N is an integer greater than 1, then the first indication information may indicate at least one of the following:

The confidence of the PMI of each time domain unit in the N time domain units;

The confidence of the PMI of each time domain unit in the M time domain units; wherein the M is greater than or equal to 1 and less than the N, and the M time domain units are time domain units whose PMI is lower than a first threshold value among the N time domain units, or the M time domain units are time domain units whose PMI is higher than a second threshold value among the N time domain units.

Optionally, when the first indication information indicates the confidence of the PMI of each of the predicted multiple time domain units, the mapping order of the confidence is consistent with the order of the corresponding time domain units;

And/or, when the first indication information indicates the confidence of the PMI corresponding to each of the predicted multiple time domain unit groups, the mapping order of the confidence is consistent with the order of the corresponding time domain unit groups.

Optionally, when the first indication information indicates the confidence of the PMI of each of the predicted multiple time domain units, differential coding is used between the confidences of the PMI of each time domain unit;

And/or, when the first indication information indicates the confidence level of the PMI corresponding to each of the predicted multiple time domain unit groups, differential coding is used between the confidence levels of the PMI corresponding to each of the time domain unit groups.

Optionally, the mapping priority of the confidence level satisfies at least one of the following:

Higher mapping priority than sub-band PMI information;

Higher mapping priority than PMI combination coefficients.

Optionally, when the network configures the terminal to feed back the PMI of future n time domain units, n is an integer greater than 1, and the CSI report satisfies at least one of the following:

The CSI report includes PMIs of m1 time domain units, where the m1 time domain units are time domain units among the n time domain units, m1 is less than or equal to n, and the CSI report implicitly indicates that the confidence of the PMIs of the m1 time domain units is credible;

The CSI report includes PMIs of m2 time domain units, a first time domain unit of the m2 time domain units is a time domain unit of the n time domain units, m2 is less than or equal to n, and the CSI report implicitly indicates that the confidence of the PMIs of the m2 time domain units is credible;

The CSI report includes PMIs of m3 time domain units, there is no identical time domain unit between the m3 time domain units and the n time domain units, the m3 is less than or equal to the n, and the CSI report implicitly indicates that the confidence of the PMIs of the m3 time domain units is credible.

Optionally, when the CSI report includes PMIs of m1 time domain units, the CSI report includes second indication information, where the second indication information is used to indicate a value of m1.

Optionally, the network side device may send first configuration information or activation signaling to the terminal, wherein the first configuration information is used to configure whether the terminal can feedback the PMI of a number of time domain units smaller than the n, and the activation signaling is used to activate the terminal to feedback the PMI of a number of time domain units smaller than the n.

Optionally, when the CSI report includes the PMI of m2 time domain units, the time domain interval between the m2 time domain units is related to the first time domain interval;

And/or, the first time domain unit among the m2 time domain units is the first time domain unit among the n time domain units.

Optionally, when the CSI report includes PMIs of m2 time domain units, if The first time domain unit is the first time domain unit among the n time domain units, and the CSI report includes third indication information, where the third indication information is used to indicate an offset value of each time domain unit among the m2 time domain units except the first time domain unit compared to the first time domain unit;

Alternatively, if the first time domain unit among the m2 time domain units is not the first time domain unit among the n time domain units, the CSI report includes fourth indication information, and the fourth indication information is used to indicate the offset value of the first time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units, and the offset value of each time domain unit among the m2 time domain units except the first time domain unit compared to the first time domain unit; or, the fourth indication information is used to indicate the offset value of each time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units.

Optionally, when the CSI report includes PMIs of m3 time domain units, the CSI report includes fifth indication information, and the fifth indication information is used to indicate the offset value of each of the m3 time domain units compared to any one of the following items: the time domain unit for feeding back the CSI report, the time domain unit where the reference resource is located, and the time domain unit for resource measurement.

Optionally, the network side device may send second configuration information to the terminal, where the second configuration information is used to configure feedback resources for the terminal, and the feedback resources are configured according to the PMI of n time domain units fed back by the terminal.

Optionally, when the network configures the terminal to feed back the PMI of a time domain units within the first time window, the CSI report includes the PMI of b time domain units within the first time window, and the CSI report implicitly indicates that the confidence of the time domain units after the first time domain unit within the first time window is unreliable, and the first time domain unit is the last time domain unit among the b time domain units.

Optionally, the time domain interval between the b time domain units is related to the second time domain interval;

And/or, the CSI report includes sixth indication information, and the sixth indication information is used to indicate an offset value of each of the b time domain units compared to the starting position of the first time window.

Optionally, the first time domain unit of the b time domain units is located at the starting position of the first time window, and the CSI report includes seventh indication information, and the seventh indication information is used to indicate the offset value of each time domain unit in the b time domain units except the first time domain unit compared to the starting position of the first time window.

The information feedback method provided in the embodiment of the present application can be executed by an information feedback device. In the embodiment of the present application, the information feedback device provided in the embodiment of the present application is described by taking the information feedback method executed by the information feedback device as an example.

Please refer to FIG. 4 , which is a schematic diagram of the structure of an information feedback device provided in an embodiment of the present application. The device is applied to a terminal. As shown in FIG. 4 , the information feedback device 40 includes:

The first sending module 41 is configured to send a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feed back a confidence level of the predicted PMI.

Optionally, when the CSI report explicitly feeds back the confidence of the predicted PMI, the CSI report includes first indication information, where the first indication information is used to indicate at least one of the following:

Optionally, when the first indication information indicates the confidence of the PMI of each time domain unit in the predicted at least one time domain unit, if the network configures the terminal to feedback the PMI of future N time domain units, and N is an integer greater than 1, then the first indication information indicates at least one of the following:

The confidence of the PMI of each time domain unit in the N time domain units;

Higher mapping priority than sub-band PMI information;

Higher mapping priority than PMI combination coefficients.

Optionally, the confidence level is a quantized value, and the quantized value satisfies any of the following:

The CSI report includes the PMI of m2 time domain units, the first time domain unit of the m2 time domain units is one time domain unit among the n time domain units, the m2 is less than or equal to the n, and the CSI report implicitly indicates that the confidence of the PMI of the m2 time domain unit is credible;

Optionally, when the CSI report includes PMIs of m1 time domain units,

The CSI report includes second indication information, where the second indication information is used to indicate a value of m1.

Optionally, the information feedback device 40 further includes:

The first receiving module is used to receive first configuration information or activation signaling from a network side device, wherein the first configuration information is used to configure whether the terminal can feedback the PMI of a number of time domain units smaller than the n, and the activation signaling is used to activate the terminal to feedback the PMI of a number of time domain units smaller than the n.

Optionally, when the CSI report includes PMIs of m2 time domain units,

If the first time domain unit among the m2 time domain units is the first time domain unit among the n time domain units, the CSI report includes third indication information, where the third indication information is used to indicate an offset value of each time domain unit among the other time domain units except the first time domain unit among the m2 time domain units compared to the first time domain unit;

Optionally, the first receiving module may also be used to: receive second configuration information from a network side device, where the second configuration information is used to configure feedback resources for the terminal, and the feedback resources are configured according to the PMI of n time domain units fed back by the terminal.

Optionally, when the network configures the terminal to feed back the PMIs of a time domain units within the first time window, the CSI report includes the PMIs of b time domain units within the first time window, and the CSI report implicitly indicates the PMIs of b time domain units within the first time window. The confidence of the time domain unit after the first time domain unit in a time window is unreliable, and the first time domain unit is the last time domain unit among the b time domain units;

Wherein, a is an integer greater than 1, and b is less than or equal to a.

The information feedback device 40 in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

The information feedback device 40 provided in the embodiment of the present application can implement each process implemented by the method embodiment of Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

Please refer to FIG. 5 , which is a schematic diagram of the structure of an information feedback device provided in an embodiment of the present application. The device is applied to a network side device. As shown in FIG. 5 , the information feedback device 50 includes:

A second receiving module 51 is configured to receive a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback a confidence level of the predicted PMI;

The determination module 52 is used to determine the confidence of the predicted PMI according to the CSI report.

a confidence level of the predicted PMI for each time domain unit in at least one time domain unit;

The confidence of the PMI of each time domain unit in the N time domain units;

Higher mapping priority than sub-band PMI information;

Higher mapping priority than PMI combination coefficients.

Optionally, when the CSI report includes PMIs of m1 time domain units,

Optionally, the information feedback device 50 further includes:

The second sending module is used to send first configuration information or activation signaling to the terminal, the first configuration information is used to configure whether the terminal can feedback the PMI of the time domain units with a number smaller than the n, and the activation signaling is used to activate the terminal to feedback the PMI of the time domain units with a number smaller than the n.

Optionally, when the CSI report includes the PMI of m2 time domain units, if a first time domain unit among the m2 time domain units is the first time domain unit among the n time domain units, the CSI report includes third indication information, where the third indication information is used to indicate an offset value of each time domain unit among the m2 time domain units except the first time domain unit compared to the first time domain unit;

Alternatively, if the first time domain unit of the m2 time domain units is not the first time domain unit of the n time domain units time domain units, the CSI report includes fourth indication information, and the fourth indication information is used to indicate the offset value of the first time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units, and the offset value of each time domain unit among the other time domain units except the first time domain unit among the m2 time domain units compared to the first time domain unit; or, the fourth indication information is used to indicate the offset value of each time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units.

Optionally, when the CSI report includes PMIs of m3 time domain units, the CSI report includes fifth indication information, and the fifth indication information is used to indicate an offset value of each of the m3 time domain units compared to any one of the following items: the time domain unit for feeding back the CSI report, the time domain unit where the reference resource is located, and the time domain unit for resource measurement.

Optionally, the second sending module may also be used to: send second configuration information to the terminal, where the second configuration information is used to configure feedback resources for the terminal, and the feedback resources are configured according to the PMI of n time domain units fed back by the terminal.

The information feedback device 50 provided in the embodiment of the present application can implement each process implemented by the method embodiment of Figure 3 and achieve the same technical effect. To avoid repetition, it will not be described here.

Optionally, as shown in FIG6, the embodiment of the present application further provides a communication device 60, including a processor 61 and a memory 62, the memory 62 stores a program or instruction that can be run on the processor 61, for example, when the communication device 60 is a terminal, the program or instruction is executed by the processor 61 to implement the various steps of the information feedback method embodiment shown in FIG2 above, and can achieve the same technical effect. When the communication device 60 is a network side device, the program or instruction is executed by the processor 61 to implement the various steps of the information feedback method embodiment shown in FIG3 above, and can achieve the same technical effect, to avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface is used to send a CSI report, the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the terminal embodiment, and can achieve the same technical effect.

Specifically, FIG7 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

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

Those skilled in the art will appreciate that the terminal 700 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 710 through a power management system, so as to implement functions such as managing charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG7 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange components differently, which will not be described in detail here.

It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 701 can transmit the data to the processor 710 for processing; in addition, the RF unit 701 can send uplink data to the network side device. Generally, the RF unit 701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

The memory 709 can be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 709 may include a volatile memory or a non-volatile memory, or the memory 709 may include both volatile and non-volatile memories. Among them, 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), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memories.

The processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, The modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 710.

The radio frequency unit 701 is used to send a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feed back the confidence of the predicted PMI.

The terminal 700 provided in the embodiment of the present application can implement each process implemented by the method embodiment of Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is used to receive a CSI report, the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback the confidence of the predicted PMI; the processor is used to determine the confidence of the predicted PMI according to the CSI report. This network side device embodiment corresponds to the above-mentioned network side device method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this network side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 8, the network side device 80 includes: an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected to the radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information through the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be sent and sends it to the radio frequency device 82. The radio frequency device 82 processes the received information and sends it out through the antenna 81.

The method executed by the network-side device in the above embodiment may be implemented in the baseband device 83, which includes a baseband processor.

The baseband device 83 may include, for example, at least one baseband board, on which a plurality of chips are arranged, as shown in FIG8 , wherein one of the chips is, for example, a baseband processor, which is connected to the memory 85 through a bus interface to call a program in the memory 85 and execute the network device operations shown in the above method embodiment.

The network side device may also include a network interface 86, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 80 of the embodiment of the present application also includes: instructions or programs stored in the memory 85 and executable on the processor 84. The processor 84 calls the instructions or programs in the memory 85 to execute the methods executed by the modules shown in Figure 5 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned information feedback method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

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

An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned information feedback method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

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

The embodiment of the present application further provides a computer program/program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned information feedback method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

An embodiment of the present application also provides a communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the information feedback method described in FIG. 2 above, and the network side device can be used to execute the steps of the information feedback method described in FIG. 3 above.

It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

An information feedback method, comprising:

The terminal sends a channel state information CSI report, where the CSI report includes a predicted precoding matrix indication PMI, and the CSI report is used to explicitly or implicitly feed back a confidence level of the predicted PMI.
The method according to claim 1, wherein when the CSI report explicitly feeds back the confidence of the predicted PMI, the CSI report includes first indication information, and the first indication information is used to indicate at least one of the following:

A confidence level of a PMI corresponding to at least one predicted time domain unit;

a confidence level of the predicted PMI for each time-domain unit in at least one time-domain unit;

A confidence level of the PMI corresponding to each time-domain unit group in the at least one predicted time-domain unit group.
The method according to claim 2, wherein, when the first indication information indicates the confidence of the predicted PMI of each time domain unit in at least one time domain unit, if the network configures the terminal to feed back the PMI of future N time domain units, where N is an integer greater than 1, then the first indication information indicates at least one of the following:

The confidence of the PMI of each time domain unit in the N time domain units;

The confidence of the PMI of each time domain unit in the M time domain units; wherein the M is greater than or equal to 1 and less than the N, and the M time domain units are time domain units whose PMI is lower than a first threshold value among the N time domain units, or the M time domain units are time domain units whose PMI is higher than a second threshold value among the N time domain units.
The method according to claim 2, wherein, when the first indication information indicates the confidence of the PMI of each of the predicted multiple time domain units, the mapping order of the confidence is consistent with the order of the corresponding time domain units;

and / or,

When the first indication information indicates the confidence of the PMI corresponding to each of the predicted multiple time domain unit groups, the mapping order of the confidence is consistent with the order of the corresponding time domain unit groups.
The method according to claim 2, wherein, when the first indication information indicates the confidence of the PMI of each of the predicted multiple time domain units, the confidence of the PMI of each time domain unit is differentially coded;

and / or,

When the first indication information indicates the confidence level of the PMI corresponding to each of the predicted multiple time domain unit groups, differential coding is used between the confidence levels of the PMI corresponding to each of the time domain unit groups.
The method according to claim 2, wherein the mapping priority of the confidence level satisfies at least one of the following:

Higher mapping priority than sub-band PMI information;

Higher mapping priority than PMI combination coefficients.
The method according to claim 2, wherein the confidence level is a quantized value, and the quantized value satisfies any of the following:

The quantization value is greater than or equal to 0 and less than or equal to 1, and the smaller the quantization value, the lower the confidence or higher;

The quantization value is greater than or equal to the third threshold value and less than or equal to 1, and the smaller the quantization value is, the lower or higher the confidence level is;

The quantization value is greater than or equal to 0 and less than or equal to a fourth threshold value, and the smaller the quantization value is, the lower or higher the confidence level is;

The quantization value is equal to 0 or 1, wherein 0 represents that the confidence level is unreliable, and 1 represents that the confidence level is reliable; or, 0 represents that the confidence level is reliable, and 1 represents that the confidence level is unreliable.
The method according to claim 1, wherein when the network configures the terminal to feed back the PMI of the next n time domain units, n is an integer greater than 1, and the CSI report satisfies at least one of the following:

The CSI report includes PMIs of m1 time domain units, where the m1 time domain units are time domain units among the n time domain units, m1 is less than or equal to n, and the CSI report implicitly indicates that the confidence of the PMIs of the m1 time domain units is credible;

The CSI report includes PMIs of m2 time domain units, a first time domain unit of the m2 time domain units is a time domain unit of the n time domain units, m2 is less than or equal to n, and the CSI report implicitly indicates that the confidence of the PMIs of the m2 time domain units is credible;

The CSI report includes PMIs of m3 time domain units, there is no identical time domain unit between the m3 time domain units and the n time domain units, the m3 is less than or equal to the n, and the CSI report implicitly indicates that the confidence of the PMIs of the m3 time domain units is credible.
The method according to claim 8, wherein when the CSI report includes the PMI of m1 time domain units,

The CSI report includes second indication information, where the second indication information is used to indicate a value of m1;

and / or,

The method further comprises:

The terminal receives first configuration information or activation signaling from a network side device, wherein the first configuration information is used to configure whether the terminal can feedback the PMI of a number of time domain units smaller than the n, and the activation signaling is used to activate the terminal to feedback the PMI of a number of time domain units smaller than the n.
The method according to claim 8, wherein when the CSI report includes the PMI of m2 time domain units,

The time domain interval between the m2 time domain units is related to the first time domain interval;

and / or,

The first time domain unit among the m2 time domain units is the first time domain unit among the n time domain units.
The method according to claim 8, wherein when the CSI report includes the PMI of m2 time domain units,

If the first time domain unit of the m2 time domain units is the first time domain unit of the n time domain units, the CSI report includes third indication information, and the third indication information is used to indicate the first time domain unit of the m2 time domain units. an offset value of each time domain unit in other time domain units except the first time domain unit compared with the first time domain unit;

or,

If the first time domain unit among the m2 time domain units is not the first time domain unit among the n time domain units, the CSI report includes fourth indication information, and the fourth indication information is used to indicate the offset value of the first time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units, and the offset value of each time domain unit among the m2 time domain units except the first time domain unit compared to the first time domain unit; or, the fourth indication information is used to indicate the offset value of each time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units.
The method according to claim 8, wherein, when the CSI report includes the PMI of m3 time domain units, the CSI report includes fifth indication information, and the fifth indication information is used to indicate the offset value of each of the m3 time domain units compared to any one of the following items: the time domain unit for feeding back the CSI report, the time domain unit where the reference resource is located, and the time domain unit for resource measurement.
The method according to claim 8, wherein the method further comprises:

The terminal receives second configuration information from a network side device, where the second configuration information is used to configure feedback resources for the terminal, and the feedback resources are configured according to the PMI of n time domain units fed back by the terminal.
The method according to claim 1, wherein, when the network configures the terminal to feed back the PMI of a time domain units within a first time window, the CSI report includes the PMI of b time domain units within the first time window, and the CSI report implicitly indicates that the confidence of the time domain unit after the first time domain unit in the first time window is unreliable, and the first time domain unit is the last time domain unit among the b time domain units;

Wherein, a is an integer greater than 1, and b is less than or equal to a.
The method according to claim 14, wherein the time domain interval between the b time domain units is related to the second time domain interval;

and / or,

The CSI report includes sixth indication information, where the sixth indication information is used to indicate an offset value of each of the b time domain units compared to a starting position of the first time window.
The method according to claim 14, wherein the first time domain unit of the b time domain units is located at the starting position of the first time window, and the CSI report includes seventh indication information, and the seventh indication information is used to indicate the offset value of each time domain unit in the other time domain units except the first time domain unit among the b time domain units compared to the starting position of the first time window.
An information feedback method, comprising:

The network side device receives a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback a confidence level of the predicted PMI;

The network side device determines the confidence of the predicted PMI according to the CSI report.
The method according to claim 17, wherein when the CSI report explicitly feeds back the predicted PMI When the CSI report includes first indication information, the first indication information is used to indicate at least one of the following:

A confidence level of a PMI corresponding to at least one predicted time domain unit;

a confidence level of the predicted PMI for each time-domain unit in at least one time-domain unit;

A confidence level of the PMI corresponding to each time-domain unit group in the at least one predicted time-domain unit group.
The method according to claim 18, wherein when the first indication information indicates the confidence of the predicted PMI of each time domain unit in at least one time domain unit, if the network configures the terminal to feed back the PMI of future N time domain units, where N is an integer greater than 1, then the first indication information indicates at least one of the following:

The confidence of the PMI of each time domain unit in the N time domain units;

The confidence of the PMI of each time domain unit in the M time domain units; wherein the M is greater than or equal to 1 and less than the N, and the M time domain units are time domain units whose PMI is lower than a first threshold value among the N time domain units, or the M time domain units are time domain units whose PMI is higher than a second threshold value among the N time domain units.
The method according to claim 18, wherein, when the first indication information indicates the confidence of the PMI of each of the predicted multiple time domain units, the mapping order of the confidence is consistent with the order of the corresponding time domain units;

and / or,

When the first indication information indicates the confidence of the PMI corresponding to each of the predicted multiple time domain unit groups, the mapping order of the confidence is consistent with the order of the corresponding time domain unit groups.
The method according to claim 18, wherein, when the first indication information indicates the confidence of the PMI of each of the predicted multiple time domain units, the confidence of the PMI of each time domain unit is differentially coded;

and / or,

When the first indication information indicates the confidence level of the PMI corresponding to each of the predicted multiple time domain unit groups, differential coding is used between the confidence levels of the PMI corresponding to each of the time domain unit groups.
The method according to claim 18, wherein the mapping priority of the confidence level satisfies at least one of the following:

Higher mapping priority than sub-band PMI information;

Higher mapping priority than PMI combination coefficients.
The method according to claim 17, wherein when the network configures the terminal to feed back the PMI of the next n time domain units, n is an integer greater than 1, and the CSI report satisfies at least one of the following:

The CSI report includes PMIs of m1 time domain units, where the m1 time domain units are time domain units among the n time domain units, m1 is less than or equal to n, and the CSI report implicitly indicates that the confidence of the PMIs of the m1 time domain units is credible;

The CSI report includes PMIs of m2 time domain units, a first time domain unit of the m2 time domain units is a time domain unit of the n time domain units, m2 is less than or equal to n, and the CSI report implicitly indicates that the confidence of the PMIs of the m2 time domain units is credible;

The CSI report includes PMIs of m3 time domain units, there is no identical time domain unit between the m3 time domain units and the n time domain units, the m3 is less than or equal to the n, and the CSI report implicitly indicates that the confidence of the PMIs of the m3 time domain units is credible.
The method according to claim 23, wherein when the CSI report includes the PMI of m1 time domain units,

The CSI report includes second indication information, where the second indication information is used to indicate a value of m1;

and / or,

The method further comprises:

The network side device sends first configuration information or activation signaling to the terminal, the first configuration information is used to configure whether the terminal can feedback the PMI of a number of time domain units smaller than the n, and the activation signaling is used to activate the terminal to feedback the PMI of a number of time domain units smaller than the n.
The method according to claim 23, wherein when the CSI report includes the PMI of m2 time domain units,

The time domain interval between the m2 time domain units is related to the first time domain interval;

and / or,

The first time domain unit among the m2 time domain units is the first time domain unit among the n time domain units.
The method according to claim 23, wherein when the CSI report includes the PMI of m2 time domain units,

If the first time domain unit among the m2 time domain units is the first time domain unit among the n time domain units, the CSI report includes third indication information, where the third indication information is used to indicate an offset value of each time domain unit among the other time domain units except the first time domain unit among the m2 time domain units compared to the first time domain unit;

or,

If the first time domain unit among the m2 time domain units is not the first time domain unit among the n time domain units, the CSI report includes fourth indication information, and the fourth indication information is used to indicate the offset value of the first time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units, and the offset value of each time domain unit among the m2 time domain units except the first time domain unit compared to the first time domain unit; or, the fourth indication information is used to indicate the offset value of each time domain unit among the m2 time domain units compared to the first time domain unit among the n time domain units.
The method according to claim 23, wherein, when the CSI report includes the PMI of m3 time domain units, the CSI report includes fifth indication information, and the fifth indication information is used to indicate the offset value of each of the m3 time domain units compared to any one of the following items: the time domain unit for feeding back the CSI report, the time domain unit where the reference resource is located, and the time domain unit for resource measurement.
The method according to claim 23, wherein the method further comprises:

The network side device sends second configuration information to the terminal, and the second configuration information is used to configure the terminal A feedback resource is configured, where the feedback resource is configured according to the PMI of n time domain units fed back by the terminal.
The method according to claim 17, wherein, when the network configures the terminal to feed back the PMI of a time domain units within a first time window, the CSI report includes the PMI of b time domain units within the first time window, and the CSI report implicitly indicates that the confidence of the time domain units after the first time domain unit in the first time window is unreliable, and the first time domain unit is the last time domain unit among the b time domain units.
The method according to claim 29, wherein the time domain interval between the b time domain units is related to the second time domain interval;

and / or,

The CSI report includes sixth indication information, where the sixth indication information is used to indicate an offset value of each of the b time domain units compared to a starting position of the first time window.
The method according to claim 29, wherein the first time domain unit of the b time domain units is located at the starting position of the first time window, and the CSI report includes seventh indication information, and the seventh indication information is used to indicate the offset value of each time domain unit in the other time domain units except the first time domain unit among the b time domain units compared to the starting position of the first time window.
An information feedback device, comprising:

The first sending module is used to send a CSI report, where the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feed back a confidence level of the predicted PMI.
An information feedback device, comprising:

A second receiving module, configured to receive a CSI report, wherein the CSI report includes a predicted PMI, and the CSI report is used to explicitly or implicitly feedback a confidence level of the predicted PMI;

A determination module is used to determine the confidence of the predicted PMI according to the CSI report.
A terminal comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the information feedback method according to any one of claims 1 to 16.
A network side device comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the information feedback method as described in any one of claims 17 to 31.
A readable storage medium storing a program or instruction, wherein when the program or instruction is executed by a processor, the program or instruction implements the steps of the information feedback method according to any one of claims 1 to 16, or implements the steps of the information feedback method according to any one of claims 17 to 31.