EP-4738747-A1 - CSI FEEDBACK DETERMINATION METHOD AND APPARATUS, DEVICE, SYSTEM AND STORAGE MEDIUM

Abstract

The present disclosure relates to a channel status information (CSI) feedback determination method and apparatus, a device, a system and a storage medium. The method comprises: a network device receiving first instruction information sent by a terminal device; determining a CSI feedback mode of the terminal device on the basis of the first instruction information, wherein the CSI feedback mode comprises a first feedback mode and/or a second feedback mode, the first feedback mode is used for instructing the terminal device to perform CSI feedback on the basis of codebook configuration information configured by the network device, and the second feedback mode is used for instructing the terminal device to perform CSI feedback on the basis of a pre-activated first CSI model. In this way, the accuracy of CSI feedback can be ensured, and the system performance loss can be reduced.

Inventors

• LIU, Zhengxuan

Assignees

• Beijing Xiaomi Mobile Software Co., Ltd.

Dates

Publication Date

20260506

Application Date

20230628

Claims (20)

1. A Channel Status Information (CSI) feedback determination method, comprising: receiving, by a network device, first indication information sent from a terminal device; and based on the first indication information, determining a CSI feedback scheme of the terminal device, wherein the CSI feedback scheme comprises a first feedback scheme and/or a second feedback scheme, the first feedback scheme is used to indicate the terminal device to perform CSI feedback based on codebook configuration information configured by the network device, and the second feedback scheme is used to indicate the terminal device to perform the CSI feedback based on a pre-activated first CSI model.
2. The method according to claim 1, wherein determining the CSI feedback scheme of the terminal device based on the first indication information comprises: based on the first indication information, determining a first performance indicator and a second performance indicator, wherein the first performance indicator is a performance indicator when the CSI feedback is performed using the first feedback scheme, and the second performance indicator is a performance indicator when the CSI feedback is performed using the second feedback scheme; and determining the CSI feedback scheme based on the first performance indicator and the second performance indicator.
3. The method according to claim 2, wherein the first indication information comprises first CSI information and second CSI information, the first CSI information is CSI information when the CSI feedback is performed based on the codebook configuration information, the second CSI information is initial CSI information input to the first CSI model, the first performance indicator is obtained by performing a performance indicator calculation based on the first CSI information and the second CSI information, the second performance indicator is obtained by performing a performance indicator calculation based on obtained third CSI information and the second CSI information, and the third CSI information is CSI information output after restoring CSI information output by the first CSI model through a CSI restoration model deployed in the network device.
4. The method according to claim 2, wherein the first indication information comprises first CSI information, second CSI information and third CSI information, the first CSI information is CSI information when the CSI feedback is performed based on the codebook configuration information, the second CSI information is initial CSI information input to the first CSI model, the third CSI information is CSI information output by the first CSI model, the first performance indicator is obtained by performing a performance indicator calculation based on the first CSI information and the second CSI information, and the second performance indicator is obtained by performing a performance indicator calculation based on the third CSI information and the second CSI information.
5. The method according to claim 2, wherein the first indication information comprises the first performance indicator and the second performance indicator.
6. The method according to any one of claims 2 to 5, wherein determining the CSI feedback scheme based on the first performance indicator and the second performance indicator comprises: when the first performance indicator is smaller than or equal to the second performance indicator, determining that the CSI feedback scheme is the second feedback scheme; or when the first performance indicator is greater than or equal to the second performance indicator, determining that the CSI feedback scheme is the first feedback scheme.
7. The method according to claim 6, wherein when there are S first performance indicators and S second performance indicators, S being a positive integer greater than 1, determining the CSI feedback scheme based on the first performance indicator and the second performance indicator further comprises: when a first number is greater than or equal to a preset first number, determining that the CSI feedback scheme is the second feedback scheme, wherein the first number is the number of cases, among the S first performance indicators and the S second performance indicators, that meet the first performance indicator being smaller than or equal to the second performance indicator; or when a second number is greater than or equal to a preset second number, determining that the CSI feedback scheme is the first feedback scheme, wherein the second number is the number of cases, among the S first performance indicators and the S second performance indicators, that meet the first performance indicator being greater than or equal to the second performance indicator.
8. The method according to claim 1, wherein the first indication information comprises first CSI information or third CSI information, the first CSI information is CSI information when the CSI feedback is performed based on the codebook configuration information, and the third CSI information comprises CSI information output by the first CSI model, wherein determining the CSI feedback scheme of the terminal device based on the first indication information comprises: when the first indication information comprises the first CSI information, determining that the CSI feedback scheme is the first feedback scheme; or when the first indication information comprises the third CSI information, determining that the CSI feedback scheme is the second feedback scheme.
9. The method according to claim 1, wherein the first indication information comprises a recommended feedback scheme of the terminal device, wherein determining the CSI feedback scheme based on the first indication information comprises: based on the recommended feedback scheme, determining the CSI feedback scheme, wherein the CSI feedback scheme is the recommended feedback scheme, or the CSI feedback scheme is a feedback scheme in the first feedback scheme and the second feedback scheme that is different from the recommended feedback scheme.
10. The method according to claim 1, wherein before receiving the first indication information sent from the terminal device, the method further comprises: sending second indication information to the terminal device, wherein the second indication information is used to indicate target configuration information that is configured by the network device for the terminal device, and the target configuration information comprises at least the codebook configuration information.
11. The method according to claim 10, wherein sending the second indication information to the terminal device comprises: receiving first request information sent from the terminal device, wherein the first request information is used to request information configuration for the terminal device; and based on the first request information, sending the second indication information to the terminal device.
12. The method according to claim 10, wherein when a CSI feedback payload and/or an uplink transmission resource configured by the network device changes, sending the second indication information to the terminal device comprises: based on a changed CSI feedback payload and/or uplink transmission resource, sending the second indication information to the terminal device.
13. The method according to any one of claims 10 to 12, wherein the target configuration information further comprises parameter configuration information, the parameter configuration information is used to determine the first CSI model, and the parameter configuration information comprises at least one of: a CSI feedback payload, an uplink transmission resource, the number of subbands, a carrier size, or the number of transmission ports for a reference signal.
14. The method according to claim 10, further comprising: sending third indication information to the terminal device, wherein the third indication information is used to indicate to activate the first CSI model that is pre-deployed in the terminal device.
15. The method according to claim 14, wherein sending the third indication information to the terminal device comprises: receiving second request information sent from the terminal device, wherein the second request information is used to request activation of the first CSI model; and based on the second request information, sending the third indication information to the terminal device.
16. The method according to claim 15, wherein N CSI generation models are deployed in the terminal device, where N is a positive integer greater than 1, the first CSI model is a CSI generation model among the N CSI generation models that meets a preset first condition, wherein the preset first condition comprises: a CSI generation model with the largest second performance indicator among second performance indicators respectively corresponding to M 1 CSI generation models, or a CSI generation model with the smallest absolute value of a difference between a CSI information payload output by the CSI generation model and a first feedback payload among abstract values of differences between CSI information payloads respectively output by N CSI generation models and the first feedback payload, where M 1 is a positive integer smaller than or equal to N, the first feedback payload is a feedback payload when the CSI feedback is performed using the first feedback scheme, and the second performance indicator is a performance indicator when the CSI feedback is performed based on the CSI generation model.
17. The method according to claim 16, wherein when M 1 is smaller than N, the M 1 CSI generation models are CSI generation models selected from the N CSI generation models that match preset selection information, wherein the preset selection information comprises a channel environment between the terminal device and the network device, and/or parameter configuration information configured by the network device.
18. The method according to claim 17, wherein when multiple same CSI information payloads exist, the first CSI model is a CSI generation model, determined from CSI generation models corresponding to the multiple same CSI information payloads, that matches the preset selection information, wherein the preset selection information comprises the channel environment between the terminal device and the network device, and/or the parameter configuration information configured by the network device.
19. The method according to claim 15, wherein N two-sided models are deployed in the terminal device, the two-sided model comprises a CSI generation model and a CSI restoration model, N is a positive integer greater than 1, the first CSI model is a two-sided model among the N two-sided models that matches preset selection information, the preset selection information comprises an channel environment between the terminal device and the network device, and/or parameter configuration information configured by the network device.
20. The method according to claim 19, wherein when M 2 matching two-sided models exist, the first CSI model is a two-sided model with the largest second performance indicator among second performance indicators respectively corresponding to the M 2 two-sided models, M 2 is a positive integer smaller than or equal to N, and the second performance indicator is a performance indicator when the CSI feedback is performed using a two-sided model indicated by the second feedback scheme.

Description

TECHNICAL FIELD The present disclosure relates to the communication technical field, and more specifically, to a CSI feedback determination method and apparatus, a device, a system, and a storage medium. BACKGROUND The 3rd Generation Partnership Project (3GPP) standardization already includes a codebook-based CSI feedback method, and researches are currently conducted on implementing Channel Status Information (CSI) compression feedback and restoration using a two-sided model based on Artificial Intelligence (Al) or Machine Learning (ML). Since the data transmission performance mainly depends on feedback of CSI information, how to determine a specific scheme for CSI feedback to ensure accuracy of the CSI feedback is a crucial problem that urgently needs to be addressed. SUMMARY Embodiments of the present disclosure provide a CSI feedback determination method and apparatus, a device, a system, and a storage medium. According to a first aspect of an embodiment of the present disclosure, a Channel Status Information (CSI) feedback determination method is provided. The method includes: receiving, by a network device, first indication information sent from a terminal device; andbased on the first indication information, determining a CSI feedback scheme of the terminal device, wherein the CSI feedback scheme includes a first feedback scheme and/or a second feedback scheme, the first feedback scheme is used to indicate the terminal device to perform CSI feedback based on codebook configuration information configured by the network device, and the second feedback scheme is used to indicate the terminal device to perform the CSI feedback based on a pre-activated first CSI model. In some embodiments, determining the CSI feedback scheme of the terminal device based on the first indication information includes: based on the first indication information, determining a first performance indicator and a second performance indicator, wherein the first performance indicator is a performance indicator when the CSI feedback is performed using the first feedback scheme, and the second performance indicator is a performance indicator when the CSI feedback is performed using the second feedback scheme; anddetermining the CSI feedback scheme based on the first performance indicator and the second performance indicator. In some embodiments, the first indication information includes first CSI information and second CSI information, the first CSI information is CSI information when the CSI feedback is performed based on the codebook configuration information, the second CSI information is initial CSI information input to the first CSI model, the first performance indicator is obtained by performing a performance indicator calculation based on the first CSI information and the second CSI information, the second performance indicator is obtained by performing a performance indicator calculation based on obtained third CSI information and the second CSI information, and the third CSI information is CSI information output after restoring CSI information output by the first CSI model through a CSI restoration model deployed in the network device. In some embodiments, the first indication information includes first CSI information, second CSI information and third CSI information, the first CSI information is CSI information when the CSI feedback is performed based on the codebook configuration information, the second CSI information is initial CSI information input to the first CSI model, the third CSI information is CSI information output by the first CSI model, the first performance indicator is obtained by performing a performance indicator calculation based on the first CSI information and the second CSI information, and the second performance indicator is obtained by performing a performance indicator calculation based on the third CSI information and the second CSI information. In some embodiments, the first indication information includes the first performance indicator and the second performance indicator. In some embodiments, determining the CSI feedback scheme based on the first performance indicator and the second performance indicator includes: when the first performance indicator is smaller than or equal to the second performance indicator, determining that the CSI feedback scheme is the second feedback scheme; orwhen the first performance indicator is greater than or equal to the second performance indicator, determining that the CSI feedback scheme is the first feedback scheme. In some embodiments, when there are S first performance indicators and S second performance indicators, S being a positive integer greater than 1, determining the CSI feedback scheme based on the first performance indicator and the second performance indicator further includes: when a first number is greater than or equal to a preset first number, determining that the CSI feedback scheme is the second feedback scheme, wherein the first number is th