CN-122001424-A - Communication method and device

Abstract

The application provides a communication method and a communication device, in the method, an access network device determines M reference signals, wherein a first reference signal is any one of the M reference signals, the first reference signal is determined according to a first covariance, the first covariance is determined according to a possible channel value at an ith moment and a possible channel value at a jth moment, the ith moment and the jth moment belong to n historical moments, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to n, i, j, n and M are positive integers, and the access network device sends the M reference signals. By adopting the method, the access network equipment can enable the terminal to obtain covariance corresponding to the M reference signals respectively by sending the M reference signals, so that the auxiliary terminal can conduct channel prediction, and the accuracy of a terminal channel prediction result can be improved.

Inventors

• YANG PEI
• YANG HAOTIAN
• YU ZHENG

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (20)

1. 1. A method of communication, the method comprising: Determining M reference signals, wherein a first reference signal is any one of the M reference signals, and the first reference signal is determined according to a first covariance, wherein the first covariance is determined according to a possible channel value at the ith moment and a possible channel value at the jth moment, the ith moment and the jth moment belong to n historical moments, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to n, i, j, n and M are positive integers; And transmitting the M reference signals.
2. 2. The method of claim 1, wherein after transmitting the M reference signals, the method further comprises: And receiving uplink information, wherein the uplink information indicates a channel prediction result at a first moment, and the first moment is after the n historical moments.
3. 3. The method of claim 1 or 2, wherein the first reference signal is determined from the first covariance and a first channel matrix, the first channel matrix being determined from reference signal measurements.
4. 4. A method according to claim 3, wherein the first reference signal satisfies h0×p=κ (i, j); Wherein H0 is a first channel matrix, P is a precoding matrix corresponding to the first reference signal, and κ (i, j) is the first covariance.
5. 5. The method according to any of claims 1-4, wherein the possible channel values at the i-th moment are determined from one or more sounding reference signals detected at the i-th moment, and the possible channel values at the j-th moment are determined from one or more sounding reference signals detected at the j-th moment.
6. 6. A method of communication, the method comprising: Receiving M reference signals, wherein a first reference signal is any one of the M reference signals, and the first reference signal is determined according to a first covariance, wherein the first covariance is determined according to a possible channel value at an ith moment and a possible channel value at a jth moment, the ith moment and the jth moment belong to n historical moments, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to n, i, j, n and M are positive integers; Determining M covariances according to M reference signals, wherein the M reference signals are in one-to-one correspondence with the M covariances; And determining a channel prediction result of a first moment according to the M covariance and the n historical channel estimation results, wherein the n historical channel estimation results are in one-to-one correspondence with the n historical moments, and the first moment is after the n historical moments.
7. 7. The method of claim 6, wherein after determining the channel prediction result for the first time instant based on the M covariance and the n historical channel estimation results, the method further comprises: and sending uplink information, wherein the uplink information indicates a channel prediction result at the first moment.
8. 8. The method of claim 6 or 7, wherein the first reference signal is determined from the first covariance and a first channel matrix, the first channel matrix being determined from reference signal measurements.
9. 9. The method of claim 8, wherein the first reference signal satisfies h0×p=κ (i, j); Wherein H0 is the first channel matrix, P is a precoding matrix corresponding to the first reference signal, and κ (i, j) is the first covariance.
10. 10. A method according to any of claims 6-9, wherein the possible channel values at the i-th moment are determined from one or more sounding reference signals detected by an access network device at the i-th moment, and the possible channel values at the j-th moment are determined from one or more sounding reference signals detected by the access network device at the j-th moment.
11. 11. The method according to any of claims 6-10, wherein the first time instant is the n+1th time instant; Determining a channel prediction result at a first time according to the M covariance and the n historical channel estimation results, wherein the channel prediction result comprises: Calculating a weight coefficient set according to the M covariance; and determining a channel prediction result at the n+1th moment according to the n historical channel estimation results and one or more of the n channel prediction results, wherein the n channel prediction results are in one-to-one correspondence with the n historical moments.
12. 12. A method of communication, the method comprising: Determining M parameter sets, wherein a first parameter set is any one parameter set in the M parameter sets, the first parameter set is determined according to a first covariance, the first covariance is determined according to a possible channel value at an ith moment and a possible channel value at a jth moment, the ith moment and the jth moment belong to n historical moments, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to n, i, j, n and M are positive integers; And sending the M parameter sets.
13. 13. The method of claim 12, further comprising, after transmitting the M sets of parameters: And receiving uplink information, wherein the uplink information indicates a channel prediction result at a first moment, and the first moment is after the n historical moments.
14. 14. The method of claim 12 or 13, wherein the first set of parameters comprises Lij pairs of coefficients, each pair of coefficients comprising a projection coefficient and a projection vector index, wherein the Lij pairs of coefficients are determined from the first covariance.
15. 15. The method of any one of claims 12-14, further comprising: And sending indication information, wherein the indication information indicates the historical time combinations corresponding to the M parameter sets respectively, and the historical time combinations corresponding to the first parameter set are i and j.
16. 16. The method according to any of claims 12-15, wherein the possible channel values at the i-th moment are determined from one or more sounding reference signals detected at the i-th moment, and the possible channel values at the j-th moment are determined from one or more sounding reference signals detected at the j-th moment.
17. 17. A method of communication, the method comprising: receiving M parameter sets, wherein a first parameter set is any one parameter set in the M parameter sets, the first parameter set is determined according to a first covariance, the first covariance is determined according to a possible channel value at an ith moment and a possible channel value at a jth moment, the ith moment and the jth moment belong to n historical moments, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to n, i, j, n and M are positive integers; determining M covariance according to the M parameter sets, wherein the M parameter sets are in one-to-one correspondence with the M covariance; And determining a channel prediction result of a first moment according to the M covariance and the n historical channel estimation results, wherein the n historical channel estimation results are in one-to-one correspondence with the n historical moments, and the first moment is after the n historical moments.
18. 18. The method of claim 17, further comprising, after determining a channel prediction result for the first time instant based on the M covariance and the n historical channel estimates: and sending uplink information, wherein the uplink information indicates a channel prediction result at the first moment.
19. 19. The method of claim 17 or 18, wherein the first set of parameters comprises Lij pairs of coefficients, each pair of coefficients comprising a projection coefficient and a projection vector index, wherein the Lij pairs of coefficients are determined from the first covariance.
20. 20. The method of any one of claims 17-19, further comprising: And receiving indication information, wherein the indication information indicates the historical time combinations corresponding to the M parameter sets respectively, and the historical time combinations corresponding to the first parameter set are i and j.

Description

Communication method and device Technical Field The present application relates to the field of communications, and in particular, to a communication method and apparatus. Background The transmitting end transmits the signal x, and the receiving end receives the signal Y under the influence of the fading of the wireless channel H and the noise n, which can be described as: Y=Hx+n In general, the radio channel H varies with time and frequency. In the time domain, in general, the faster the terminal speed, the faster and more severe the channel variation. Such rapid changes may cause (CHANNEL STATE information, CSI) of the terminal to age. Therefore, the terminal needs to predict the channel, i.e., predict the channel at the future time, and further perform operations such as resource request, data buffering, etc. in advance according to the predicted channel at the future time. At present, a terminal predicts a channel at a future moment by adopting an autoregressive algorithm, but the prediction result obtained by the method is not accurate enough, and how to improve the accuracy of the terminal prediction result is a concern. Disclosure of Invention The embodiment of the application provides a communication method and a communication device, which are used for improving the accuracy of a terminal in predicting a channel at a future moment. In a first aspect, the present application provides a communication method, where the method may be applied to a network side, for example, an access network device on the network side, a module (for example, a circuit, a chip, or a chip system) in the access network device, or a logic node, a logic module, or software capable of implementing all or part of the functions of the access network device. Taking an example that the method is applied to access network equipment, in the method, the access network equipment determines M reference signals, wherein a first reference signal is any one of the M reference signals, the first reference signal is determined according to a first covariance, the first covariance is determined according to a possible channel value at an ith moment and a possible channel value at a jth moment, the ith moment and the jth moment belong to n historical moments, i is not less than 1 and not more than n, j is not less than 1 and not more than n, i, j, n and M are positive integers, and the access network equipment sends the M reference signals. By adopting the method, the access network equipment can enable the terminal to obtain covariance corresponding to the M reference signals respectively by sending the M reference signals, so that the auxiliary terminal can conduct channel prediction, and the accuracy of a terminal channel prediction result can be improved. In one possible design, after the M reference signals are transmitted, uplink information is received, the uplink information indicating a channel prediction result at a first time, wherein the first time is after the n historical times. By adopting the design, the access network equipment can reserve resources for the terminal in advance based on the obtained channel prediction result, and the communication performance of the terminal can be effectively improved. In one possible design, the first reference signal is determined from the first covariance and a first channel matrix, which is determined from reference signal measurements. In one possible design, the first reference signal satisfies H 0 ×p=κ (i, j), where H 0 is a first channel matrix, P is a precoding matrix corresponding to the first reference signal, and κ (i, j) is the first covariance. In one possible design, the possible channel values at the i-th time are determined according to one or more sounding reference signals detected at the i-th time, and the possible channel values at the j-th time are determined according to one or more sounding reference signals detected at the j-th time. In a second aspect, an embodiment of the present application provides a communication method, where the method may be applied to a terminal side, for example, a terminal or a communication module/processing module in the terminal, or a circuit or a chip in the terminal that is responsible for a communication function (such as a modem (modem) chip, also called a baseband (baseband) chip, or a system on chip (SoC) chip or a system-in-a-chip (SYSTEMIN PACKAGE) SIP chip that includes a modem core), or a circuit or a chip in the terminal that is responsible for a processing function (such as a graphics processor (graphics processing unit, GPU)), where the method is applied to the terminal, for example, the terminal receives M reference signals, where a first reference signal is any one of the M reference signals, and the first reference signal is determined according to a first covariance, where the first covariance is determined according to a possible channel value at an i-th time and a possible channel value at a j-th time, where the i-th