Communication method and apparatus

Abstract

The present application provides a communication method and apparatus. The method is applied to a beam management system. The method comprises: receiving first indication information, wherein the first indication information is used for indicating information of a first reference signal resource set, the first reference signal resource set comprises at least one reference signal resource, and the first reference signal resource set is a subset of a second reference signal resource set, or the second reference signal resource set is a subset of the first reference signal resource set; and determining a first measurement result, wherein the first measurement result is obtained by measuring the at least one reference signal resource in the first reference signal resource set. The first reference signal resource set is indicated by means of the second reference signal resource set, so that bit overhead for indicating the first reference signal resource set can be reduced, thereby reducing beam scanning overhead.

Description

Communication method and apparatus

[0001] This application claims priority to the Chinese patent application No. 202411098907.6, filed on August 9, 2024, with the State Intellectual Property Office of China, and the Chinese patent application No. 202411098907.6 has the title of “Communication method and apparatus”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, in particular to a communication method and apparatus. BACKGROUND

[0003] The fifth generation mobile communication system (5G) introduces high frequency bands above 6 GHz for data communication. Compared with the low and medium frequency bands below 6 GHz, the high frequency band has a larger continuous available bandwidth and a higher center frequency, so it can obtain a larger transmission rate and system capacity. However, due to the weak penetration ability and strong path loss effect of high frequency signals (such as millimeter waves), the propagation distance of high frequency signals is limited, and the coverage ability is poor. Thanks to the large-scale antenna technology, the high frequency communication system usually uses a large number of antennas for beamforming, so as to obtain considerable beamforming gain to compensate for the limited propagation distance caused by the high frequency propagation characteristics. In order to obtain beamforming gain, the effective management of beams becomes crucial. Beam management refers to the process of periodically identifying the best beam by the user equipment (UE) side and the network side.

[0004] In order to realize beam management, the prior art reduces the overhead of beam scanning by hierarchical scanning, i.e., first scanning a wide beam, and then scanning a small part of narrow beams under the wide beam, thereby achieving the goal of reducing the overhead.

[0005] In recent years, the artificial intelligence (AI) technology has also made remarkable achievements in reducing the overhead of beam scanning. In the AI-based beam management scheme, the results obtained by part of the beam scanning, such as the RSRP of the SSB transmitted by the UE side through different wide beams, are usually taken as the input of the AI model, and the output of the AI model is the beam index of the best beam or multiple beam indexes (such as K), wherein the multiple beam indexes refer to the beam index numbers of the K best candidate beams predicted by the AI model. K is an integer greater than 1. The AI model can be located at the network side or at the terminal device side. When the AI model is located at the terminal device side, the terminal device feeds back the prediction result of the AI model to the network side, and the network side infers the K candidate beams according to the feedback result. The AI model can output the K best candidate beams at the current time, or can output the K best candidate beams at a certain time or certain times in the future. At present, the specific implementation of the AI-based beam management scheme still needs further research. SUMMARY

[0006] Embodiments of the present application provide a communication method and apparatus, which can reduce beam scanning overhead.

[0007] In a first aspect, embodiments of the present application provide a communication method. The method is applied to a first communication apparatus. The method can be implemented by the first communication apparatus or a component (e.g., a circuit, a processor, a chip or a chip system) in the first communication apparatus. Hereinafter, the method is taken as an example for description. The first communication apparatus can be a terminal device. The method comprises: receiving, by the first communication apparatus, first indication information, the first indication information being used to indicate information of a first reference signal resource set, the first reference signal resource set comprising at least one reference signal resource, the first reference signal resource set being a subset of a second reference signal resource set, or the second reference signal resource set being a subset of the first reference signal resource set, or the first reference signal resource set being a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set being the second reference signal resource set; determining a first measurement result, the first measurement result being obtained based on measurement on at least one reference signal resource in the first reference signal resource set. Optionally, the second reference signal resource set is a predefined or preconfigured reference signal resource set.

[0008] In embodiments of the present application, the first communication apparatus receives first indication information, the first indication information being used to indicate information of a first reference signal resource set. Since the first reference signal resource set is a subset of a second reference signal resource set, or the second reference signal resource set is a subset of the first reference signal resource set, or the first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set is the second reference signal resource set, the first reference signal resource set can be indicated by means of the second reference signal resource set, which can save bit overhead of indicating the first reference signal resource set, thereby reducing beam scanning overhead.

[0009] In a possible implementation, a reference signal resource in the first reference signal resource set corresponds to a periodic reference signal resource, or a semi-persistent reference signal resource, or an aperiodic reference signal resource.

[0010] In a possible implementation, the first measurement result corresponds to a first channel state information (CSI) report, and the first CSI report corresponds to a periodic CSI report, a semi-persistent CSI report, or an aperiodic CSI report.

[0011] In a possible implementation, the first indication information is carried in downlink control information (DCI) and / or a medium access control control element (MAC CE); thereby the set of reference signal resources required for measurement can be dynamically indicated.

[0012] In a possible implementation, the first set of reference signal resources is a subset of the second set of reference signal resources, including: the first indication information includes at least one relative identification information, the at least one relative identification information includes first relative identification information, the first relative identification information is relative identification information corresponding to a first reference signal resource in the first set of reference signal resources, and a first relative identifier corresponding to the first relative identification information is a relative identifier of the first reference signal resource in the second set of reference signal resources; and / or, the first indication information includes at least one deletion information, the at least one deletion information includes first deletion information, and the first deletion information is used to represent that a second reference signal resource belongs to the second set of reference signal resources but does not belong to the first set of reference signal resources; thereby the bit overhead of indicating the first set of reference signal resources can be saved.

[0013] In a possible implementation, the first relative identification information is a bitmap or a first index or a second index, the bitmap includes a plurality of bits, each bit in the bitmap corresponds to a reference signal resource in the second set of reference signal resources, and each bit in the bitmap is used to indicate whether the first set of reference signal resources contains the reference signal resource corresponding to the bit in the second set of reference signal resources, the first index is a relative index of the first reference signal resource in the second set of reference signal resources, and the second index is a binary index of all possible first reference signal resources. For example, if there are 8 types of first reference signal resources in total, the value of the second index is one of {000, 001, 010, 100, 011, 101, 110, 111}.

[0014] In a possible implementation, the second reference signal resource set is a subset of the first reference signal resource set, and the first indication information includes at least one augmentation information, the at least one augmentation information including first augmentation information, the first augmentation information being used to indicate that a third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set; in this way, the bit overhead for indicating the first reference signal resource set can be saved.

[0015] In a possible implementation, the first indication information includes two or three of the at least one relative identification information, the at least one deletion information, and the at least one augmentation information, the at least one relative identification information including first relative identification information, the first relative identification information being relative identification information corresponding to a first reference signal resource in the first reference signal resource set, the first relative identification corresponding to the first relative identification information being a relative identification of the first reference signal resource in the second reference signal resource set, the at least one deletion information including first deletion information, the first deletion information being used to indicate that a second reference signal resource belongs to the second reference signal resource set but does not belong to the first reference signal resource set, and the at least one augmentation information including first augmentation information, the first augmentation information being used to indicate that a third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set.

[0016] In a possible implementation, the first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, and the first indication information includes at least one replacement information, the at least one replacement information including first replacement information, the first replacement information being used to indicate that a fourth reference signal resource in the second reference signal resource set is replaced by a fifth reference signal resource, the first reference signal resource set being obtained by replacing one or more reference signal resources in the second reference signal resource set, the one or more reference signal resources including the fourth reference signal resource; in this way, the bit overhead for indicating the first reference signal resource set can be saved.

[0017] In a possible implementation, the first reference signal resource set includes the same number of reference signal resources as the second reference signal resource set.

[0018] In a possible implementation, the first indication information is further used to indicate associated identification information of the second reference signal resource set, and the first reference signal resource set corresponds to the associated identification information; in this way, the second reference signal resource set corresponding to the first reference signal resource set can be indicated.

[0019] In a possible implementation, the association identification information comprises one or more of the following: identification information of the second reference signal resource set, resource configuration identification information of a resource configuration (for example, a CSI resource configuration) corresponding to the second reference signal resource set, and CSI task identification information of a CSI task corresponding to the second reference signal resource set.

[0020] In a possible implementation, the method further comprises: receiving, by the first communication device, second indication information, the second indication information being used to indicate information of the second reference signal resource set; and thereby the first communication device can learn or configure the second reference signal resource set. For example, the reference signal resource in the second reference signal resource set is a semi-static channel state information reference signal (CSI-RS) resource. The second indication information corresponds to or is carried in high-layer signaling, for example, radio resource control (RRC) messages.

[0021] In a possible implementation, the first reference signal resource set corresponds to a first validity time, and the first validity time corresponds to a first CSI report corresponding to the first measurement result; thereby the first reference signal resource set can be ignored after the first validity time, and a CSI report is generated according to other reference signal resource sets. The first validity time is a predefined or preconfigured validity time.

[0022] In a possible implementation, the first reference signal resource set corresponds to a first validity time; the method further comprises: in a case where the first communication device generates a CSI report after the first validity time, ignoring the first reference signal resource set; or in a case where the first communication device generates a CSI report after the first validity time, generating the CSI report according to the second reference signal resource set; thereby the first reference signal resource set can be ignored after the first validity time, and a CSI report is generated according to other reference signal resource sets.

[0023] In a possible implementation, the first indication information is used to indicate information of the first reference signal resource set, comprising: the first indication information comprises at least one quasi co-location information, and the at least one quasi co-location information comprises first quasi co-location information corresponding to a sixth reference signal resource in the first reference signal resource set; thereby bit overhead can be saved.

[0024] In a possible implementation, the first quasi co-location information is used to indicate information of a seventh reference signal resource quasi co-located with the sixth reference signal resource, and the first quasi co-location information comprises third relative identification information, the third relative identification information indicating a relative identification of the seventh reference signal resource in a third reference signal resource set. The third reference signal resource set is a pre-configured reference signal resource set. For example, a set of candidate reference signal resources configured by the received configuration information.

[0025] In a possible implementation, the first quasi co-location information corresponds to a second validity time, and the second validity time corresponds to a first CSI report corresponding to the first measurement result; thereby, after the second validity time, an error CSI report generated according to the first quasi co-location information can be avoided.

[0026] In a possible implementation, the first quasi co-location information corresponds to a second validity time, and after the second validity time, the first quasi co-location information corresponding to the sixth reference signal resource is invalid; thereby, after the second validity time, an error CSI report generated according to the first quasi co-location information can be avoided. The first quasi co-location information being invalid includes that the sixth reference signal resource returns to quasi co-location information before the first quasi co-location information is valid, or the sixth reference signal resource does not correspond to any quasi co-location information. The second validity time is a pre-defined or pre-configured validity time.

[0027] In a possible implementation, the first quasi co-location information is applicable to the sixth reference signal resource, or in other words, the first quasi co-location information is applicable to a reference signal occasion corresponding to the sixth reference signal resource; the sixth reference signal resource is the earliest reference signal resource corresponding to a first reference signal resource identifier after the first quasi co-location information takes effect, where the first reference signal resource identifier is a reference signal resource identifier corresponding to the sixth reference signal resource, or the first reference signal resource set is the earliest reference signal resource set corresponding to a first reference signal resource configuration identifier after the first quasi co-location information takes effect, where the first reference signal resource configuration identifier is a reference signal resource configuration identifier corresponding to the first reference signal resource set; or the sixth reference signal resource is a reference signal resource corresponding to a first CSI report, and the first CSI report is the earliest CSI report after the first quasi co-location information takes effect or the earliest CSI report corresponding to a first CSI report identifier, where the first CSI report identifier is a CSI report identifier corresponding to the first CSI report. The earliest CSI report after the first quasi co-location information takes effect is the earliest aperiodic CSI report after the first quasi co-location information takes effect, or the earliest periodic CSI report, or the earliest semi-persistent CSI report. The earliest reference signal resource corresponding to the first reference signal resource identifier can be the earliest aperiodic reference signal resource corresponding to the first reference signal resource identifier, or the earliest periodic reference signal resource corresponding to the first reference signal resource identifier, or the earliest semi-persistent reference signal resource corresponding to the first reference signal resource identifier.

[0028] In a possible implementation, the first quasi co-location information is not applicable to other reference signal resources corresponding to the first reference signal resource identifier after the sixth reference signal resource, or the first quasi co-location information is not applicable to other reference signal resource sets corresponding to the first reference signal resource configuration identifier after the first reference signal resource set, or the first quasi co-location information is not applicable to other CSI reports or other CSI reports corresponding to the first CSI report identifier after the first CSI report; in this way, the first quasi co-location information can be invalidated in time.

[0029] In a possible implementation, the first quasi co-location information is applicable to the sixth reference signal resource, and the first quasi co-location information is not applicable to other reference signal resources corresponding to a first reference signal resource identifier after the sixth reference signal resource, where the first reference signal resource identifier is a reference signal resource identifier corresponding to the sixth reference signal resource.

[0030] In a possible implementation, the reference signal resources for determining the first measurement result do not include reference signal resources other than the first set of reference signal resources; and the method further includes: receiving, by the first communication device, first configuration information, the first configuration information setting that a time restriction for channel measurements corresponding to the first CSI report corresponding to the first measurement result is not configured; thereby improving the accuracy of the measurement result. The time restriction for channel measurements is configured to represent that cross-period filtering is not allowed; and is not configured to represent that cross-period filtering is allowed. In this implementation, when the second communication device (e.g., a base station) configures a case where the first communication device is allowed to perform cross-period filtering, if the first communication device receives the first quasi-co-location information, cross-period filtering is not performed on the first CSI report corresponding to the first quasi-co-location information.

[0031] In a possible implementation, the method further includes: performing, by the first communication device, measurement based on at least one reference signal resource to obtain a second measurement result, the at least one reference signal resource not including reference signal resources in the first set of reference signal resources, wherein a time restriction for channel measurements corresponding to a second CSI report corresponding to the second measurement result is disabled; thereby improving the accuracy of the measurement result.

[0032] In a possible implementation, the first indication information is carried in a DCI, and the first indication information reuses one or more fields in the DCI to indicate information of the first set of reference signal resources, the one or more fields including one or more of the following: a new data indicator (NDI) field, a redundancy version (RV) field, a hybrid automatic repeat request (HARQ) field, or a CSI request field.

[0033] In a possible implementation, the method further includes: if the first indication information is not received, reporting, by the first communication device, a second measurement result, the second measurement result being obtained by performing measurement on at least one reference signal resource in a second set of reference signal resources.

[0034] In a second aspect, the embodiments of the present application provide another communication method, which is applied to a second communication device. The method can be implemented by the second communication device or a component (for example, a circuit, a processor, a chip or a chip system) in the second communication device. Hereinafter, the second communication device is taken as an example for description. The first communication device can be a network device, for example, a base station. The method comprises the following steps: the second communication device generates first indication information according to K reference signals to be sent, the first indication information is used to indicate information of a first reference signal resource set, K reference signal resources in the first reference signal resource set correspond to the K reference signals, the first reference signal resource set includes at least one reference signal resource, the first reference signal resource set is a subset of a second reference signal resource set, or the second reference signal resource set is a subset of the first reference signal resource set, or the first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set is the second reference signal resource set, and K is an integer greater than 1; the first indication information is sent; by indicating the first reference signal resource set by means of the second reference signal resource set, the bit overhead of indicating the first reference signal resource set can be saved, thereby reducing the beam scanning overhead.

[0035] In a possible implementation, the reference signal resources in the first reference signal resource set correspond to periodic reference signal resources, or semi-persistent reference signal resources, or aperiodic reference signal resources.

[0036] In a possible implementation, the first measurement result corresponds to a first CSI report, and the first CSI report corresponds to a periodic CSI report, a semi-persistent CSI report, or an aperiodic CSI report.

[0037] In a possible implementation, the first indication information is carried in DCI and / or a MAC CE; thereby the reference signal resource set required for measurement can be dynamically indicated.

[0038] In a possible implementation, the first reference signal resource set is a subset of the second reference signal resource set, and the first indication information includes at least one relative identifier, and the at least one relative identifier includes first relative identifier, the first relative identifier is a relative identifier corresponding to a first reference signal resource in the first reference signal resource set, and a first relative index corresponding to the first relative identifier is a relative index of the first reference signal resource in the second reference signal resource set; and / or the first indication information includes at least one deletion information, and the at least one deletion information includes first deletion information, the first deletion information is used to indicate that a second reference signal resource belongs to the second reference signal resource set but does not belong to the first reference signal resource set; thereby bit overhead of indicating the first reference signal resource set can be saved.

[0039] In a possible implementation, the first relative identifier is a bitmap or a first index or a second index, the bitmap includes a plurality of bits, each bit in the bitmap corresponds to a reference signal resource in the second reference signal resource set, and each bit in the bitmap is used to indicate whether the first reference signal resource set includes the reference signal resource corresponding to the bit in the second reference signal resource set, the first index is a relative index of the first reference signal resource in the second reference signal resource set, and the second index is a binary index of all possible first reference signal resources. For example, if there are 8 types of first reference signal resources, the second index takes a value from {000, 001, 010, 100, 011, 101, 110, 111}.

[0040] In a possible implementation, the second reference signal resource set is a subset of the first reference signal resource set, and the first indication information includes at least one expansion information, and the at least one expansion information includes first expansion information, the first expansion information is used to indicate that a third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set; thereby bit overhead of indicating the first reference signal resource set can be saved.

[0041] In a possible implementation, the first indication information includes two or three of the following: at least one relative identification information, at least one deletion information, and at least one addition information, the at least one relative identification information includes first relative identification information, the first relative identification information is relative identification information corresponding to a first reference signal resource in the first reference signal resource set, and a first relative identity corresponding to the first relative identification information is a relative identity of the first reference signal resource in the second reference signal resource set, the at least one deletion information includes first deletion information, the first deletion information is used to indicate that a second reference signal resource belongs to the second reference signal resource set but does not belong to the first reference signal resource set, and the at least one addition information includes first addition information, the first addition information is used to indicate that a third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set.

[0042] In a possible implementation, the first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, and the method includes: the first indication information includes at least one replacement information, the at least one replacement information includes first replacement information, and the first replacement information is used to indicate that a fourth reference signal resource in the second reference signal resource set is replaced by a fifth reference signal resource, and after one or more reference signal resources in the second reference signal resource set are replaced, the one or more reference signal resources include the fourth reference signal resource, the first reference signal resource set is obtained; in this way, the bit overhead for indicating the first reference signal resource set can be saved.

[0043] In a possible implementation, the number of reference signal resources included in the first reference signal resource set is the same as the number of reference signal resources included in the second reference signal resource set.

[0044] In a possible implementation, the first indication information is further used to indicate associated identification information of the second reference signal resource set, and the first reference signal resource set corresponds to the associated identification information; in this way, the second reference signal resource set corresponding to the first reference signal resource set can be indicated.

[0045] In a possible implementation, the associated identification information includes one or more of the following: identification information of the second reference signal resource set, resource configuration identification information of a resource configuration (for example, a CSI resource configuration) corresponding to the second reference signal resource set, and CSI task identification information of a CSI task corresponding to the second reference signal resource set.

[0046] In a possible implementation, the method further includes: the second communication device sends second indication information, and the second indication information is used to indicate information of the second reference signal resource set; in this way, the first communication device can obtain or configure the second reference signal resource set.

[0047] In a possible implementation, the first reference signal resource set corresponds to a first validity time, and the first validity time corresponds to a first CSI report corresponding to the first measurement result; thus, after the first validity time, the first reference signal resource set can be ignored, and a CSI report is generated according to other reference signal resource sets. The first validity time is a predefined or preconfigured validity time.

[0048] In a possible implementation, the first indication information is used to indicate information of the first reference signal resource set, including: the first indication information includes at least one quasi co-location information, and the at least one quasi co-location information includes first quasi co-location information corresponding to a sixth reference signal resource in the first reference signal resource set; thus, bit overhead can be saved.

[0049] In a possible implementation, the first quasi co-location information is used to indicate information of a seventh reference signal resource quasi co-located with the sixth reference signal resource, and the first quasi co-location information includes third relative identification information indicating a relative identification of the seventh reference signal resource in a third reference signal resource set.

[0050] In a possible implementation, the first quasi co-location information corresponds to a second validity time, and the second validity time corresponds to a first CSI report corresponding to the first measurement result; thus, after the second validity time, an error CSI report can be avoided according to the first quasi co-location information.

[0051] In a possible implementation, the first quasi co-location information corresponds to a second validity time, and after the second validity time, the first quasi co-location information corresponding to the sixth reference signal resource is invalid; thus, after the second validity time, an error CSI report can be avoided according to the first quasi co-location information.

[0052] In a possible implementation, the first quasi co-location information is applicable to the sixth reference signal resource, or in other words, the first quasi co-location information is applicable to a reference signal occasion corresponding to the sixth reference signal resource; the sixth reference signal resource is the earliest reference signal resource corresponding to a first reference signal resource identifier after the first quasi co-location information takes effect, where the first reference signal resource identifier is a reference signal resource identifier corresponding to the sixth reference signal resource, or the first reference signal resource set is the earliest reference signal resource set corresponding to a first reference signal resource configuration identifier after the first quasi co-location information takes effect, where the first reference signal resource configuration identifier is a reference signal resource configuration identifier corresponding to the first reference signal resource set, or the sixth reference signal resource is a reference signal resource corresponding to a first CSI report, and the first CSI report is the earliest CSI report after the first quasi co-location information takes effect or the earliest CSI report corresponding to a first CSI report identifier, where the first CSI report identifier is a CSI report identifier corresponding to the first CSI report.

[0053] In a possible implementation, the first quasi co-location information is applicable to the sixth reference signal resource, and the first quasi co-location information is not applicable to other reference signal resources corresponding to a first reference signal resource identifier after the sixth reference signal resource, where the first reference signal resource identifier is a reference signal resource identifier corresponding to the sixth reference signal resource.

[0054] In a possible implementation, the first quasi co-location information is not applicable to other reference signal resources corresponding to a first reference signal resource identifier after the sixth reference signal resource, or the first quasi co-location information is not applicable to other reference signal resource sets corresponding to a first reference signal resource configuration identifier after a first reference signal resource set, or the first quasi co-location information is not applicable to other CSI reports after a first CSI report or other CSI reports corresponding to a first CSI report identifier; in this way, the first quasi co-location information can be invalidated in a timely manner.

[0055] In a possible implementation, the first indication information is carried in a DCI, and the first indication information reuses one or more fields in the DCI to indicate information of the first reference signal resource set, and the one or more fields include one or more of the following: a new data indication field, a redundancy version field, a hybrid automatic repeat request field, or a CSI request field.

[0056] In a third aspect, an embodiment of the present application provides another communication method, which is applied to a first communication device. The method can be implemented by the first communication device or a component (for example, a circuit, a processor, a chip or a chip system) in the first communication device. Hereinafter, the method is taken as an example for description. The method comprises the following steps: the first communication device receives first information, the first information is used to determine m reference resources, m is a positive integer, and the first information is carried in a DCI or a MAC CE; and the first communication device receives K reference signals on the m reference resources, comprising: receiving at least one first reference signal on a first reference resource, wherein the m reference resources comprise the first reference resource, the K reference signals comprise the at least one first reference signal, and k is a positive integer greater than or equal to m.

[0057] In the embodiment of the present application, the first information is carried in the DCI or the MAC CE, and the first information is used to determine the m reference resources for receiving the K reference signals, which can solve the problem that the K reference signals may need to be received on multiple different reference resources.

[0058] In a possible implementation, before receiving the first information, the method further comprises: the first communication device receives third configuration information, the third configuration information is used to configure n reference signal sets, and the n reference signal sets comprise a first reference signal set, the first reference signal set is composed of the K reference signals; thereby the first reference signal set composed of the K reference signals can be configured.

[0059] In a possible implementation, the first information is further used to determine the K reference signals; thereby the first communication device can determine the K reference signals according to the first information.

[0060] In a possible implementation, the first information comprises identification information of the first reference signal set; thereby the first communication device can determine the K reference signals according to the identification information.

[0061] In a possible implementation, the first information comprises first (quasi co-location, QCL) information, and the first QCL information is used to determine the m reference resources; thereby the bit overhead can be saved.

[0062] In a possible implementation, the method further comprises: the first communication device performs measurement on the K reference signals to obtain measurement results of the K reference signals; and the first communication device sends the measurement results of the K reference signals; thereby the accuracy of the measurement can be improved.

[0063] In a fourth aspect, an embodiment of the present application provides another communication method, which is applied to a second communication device. The method can be implemented by the second communication device or a component (for example, a circuit, a processor, a chip or a chip system) in the second communication device. Hereinafter, the method is described by taking the second communication device as an example. The method includes: generating, by the second communication device, first information according to K reference signals to be sent, the first information being used to determine m reference resources, the m reference resources being used to receive the K reference signals, a first reference resource in the m reference resources being used to receive at least one first reference signal, the K reference signals including the at least one first reference signal, the first information being carried in a DCI or a MAC CE, m being a positive integer, and k being a positive integer greater than or equal to m; and sending the first information.

[0064] In an embodiment of the present application, the first information is carried in the DCI or the MAC CE, and the second communication device sending the first information can enable a receiving end (the first communication device described above) to dynamically determine the m reference resources used to receive the K reference signals, and can solve the problem that the K reference signals may need to be received on multiple different reference resources.

[0065] In a possible implementation, before the first information is sent, the method further includes: sending, by the second communication device, third configuration information, the third configuration information being used to configure n reference signal sets, the n reference signal sets including a first reference signal set, and the first reference signal set being composed of the K reference signals; thereby enabling the receiving end to configure the first reference signal set composed of the K reference signals.

[0066] In a possible implementation, the first information is further used to determine the K reference signals; thereby enabling the receiving end to determine the K reference signals according to the first information.

[0067] In a possible implementation, the first information includes identification information of the first reference signal set; thereby enabling the receiving end to determine the K reference signals according to the identification information.

[0068] In a possible implementation, the first information includes first quasi co-location (QCL) information, and the first QCL information is used to determine the m reference resources; thereby bit overhead can be saved.

[0069] In a possible implementation, the method further includes: sending, by the second communication device, the K reference signals; and receiving a measurement result of the K reference signals, the measurement result of the K reference signals being obtained by performing measurement on the K reference signals; thereby the accuracy of measurement can be improved.

[0070] In a fifth aspect, an embodiment of the present application provides a communication apparatus, comprising: a transceiver configured to receive first indication information, the first indication information being used to indicate information of a first reference signal resource set, the first reference signal resource set comprising at least one reference signal resource, the first reference signal resource set being a subset of a second reference signal resource set, or the second reference signal resource set being a subset of the first reference signal resource set, or the first reference signal resource set being a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set being the second reference signal resource set; wherein the second reference signal resource set is a set of candidate reference signal resources, and the second reference signal resource set comprises at least one reference signal resource; and a processor configured to determine a first measurement result based on at least one reference signal resource in the first reference signal resource set. Optionally, the second reference signal resource set is a predefined or preconfigured reference signal resource set.

[0071] In a possible implementation, the transceiver is further configured to receive second indication information, the second indication information being used to indicate information of the second reference signal resource set.

[0072] In a possible implementation, the first reference signal resource set corresponds to a first validity time; and the processor is further configured to, in a case that the CSI report is generated after the first validity time, ignore the first reference signal resource set; or in a case that the CSI report is generated after the first validity time, generate the CSI report according to the second reference signal resource set.

[0073] In a possible implementation, the reference signal resources used to determine the first measurement result do not include reference signal resources other than the reference signal resources in the first reference signal resource set; and the transceiver is further configured to receive first configuration information, the first configuration information being used to set a channel measurement time limit corresponding to a first CSI report corresponding to the first measurement result as being not configured (or being disabled).

[0074] In a possible implementation, the processor is further configured to determine a second measurement result based on at least one reference signal resource, the at least one reference signal resource not including the reference signal resources in the first reference signal resource set, wherein a channel measurement time limit corresponding to a second CSI report corresponding to the second measurement result is disabled.

[0075] In a possible implementation, the transceiver is further configured to, if the first indication information is not received, report the second measurement result, the second measurement result being determined based on at least one reference signal resource in the second reference signal resource set.

[0076] Possible implementation manners of the communication apparatus of the fifth aspect can refer to various possible implementation manners of the first aspect.

[0077] The technical effects brought by various possible implementation manners of the fifth aspect can refer to the introduction of the technical effects of various possible implementation manners of the first aspect.

[0078] In a sixth aspect, an embodiment of the present application provides another communication apparatus, which comprises: a processing module configured to generate first indication information according to K reference signals to be sent, the first indication information being used to indicate information of a first reference signal resource set, K reference signal resources in the first reference signal resource set corresponding to the K reference signals, the first reference signal resource set comprising at least one reference signal resource, the first reference signal resource set being a subset of a second reference signal resource set, or the second reference signal resource set being a subset of the first reference signal resource set, or the first reference signal resource set being a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set being the second reference signal resource set, K being an integer greater than 1; and a transceiver module configured to send the first indication information.

[0079] In a possible implementation manner, the transceiver module is further configured to send second indication information, the second indication information being used to indicate information of the second reference signal resource set.

[0080] Possible implementation manners of the communication apparatus of the sixth aspect can refer to various possible implementation manners of the second aspect.

[0081] The technical effects brought by various possible implementation manners of the sixth aspect can refer to the introduction of the technical effects of various possible implementation manners of the second aspect.

[0082] In a seventh aspect, an embodiment of the present application provides another communication apparatus, which comprises: a transceiver module configured to receive first information, the first information being used to determine m reference resources, m being a positive integer, the first information being carried in a DCI or a MAC CE; a processing module configured to determine the m reference resources according to the first information; and the transceiver module is further configured to receive K reference signals on the m reference resources, comprising: receiving at least one first reference signal on a first reference resource, wherein the m reference resources comprise the first reference resource, the K reference signals comprise at least one first reference signal, and k is a positive integer greater than or equal to m.

[0083] In a possible implementation, the transceiver is further configured to receive third configuration information, the third configuration information being used for configuring n sets of reference signals, the n sets of reference signals including the first set of reference signals, the first set of reference signals being composed of the K reference signals.

[0084] In a possible implementation, the first information is further used for determining the K reference signals.

[0085] In a possible implementation, the first information includes first quasi co-location (QCL) information, the first QCL information being used for determining the m reference resources.

[0086] In a possible implementation, the processing module is further configured to perform measurement on the K reference signals to obtain measurement results of the K reference signals, and the transceiver is further configured to send the measurement results of the K reference signals.

[0087] Possible implementation of the communication apparatus of the seventh aspect can refer to possible implementation of the third aspect.

[0088] The technical effects brought by the possible implementation of the seventh aspect can refer to the introduction of the technical effects of the possible implementation of the third aspect.

[0089] In the eighth aspect, an embodiment of the present application provides another communication apparatus, which comprises: a processing module configured to generate first information according to K reference signals to be sent, the first information being used for determining m reference resources, the m reference resources being used for receiving the K reference signals, a first reference resource in the m reference resources being used for receiving at least one first reference signal, the K reference signals including the at least one first reference signal, the first information being carried in downlink control information (DCI) or a medium access control (MAC) control element (CE), m being a positive integer, and k being a positive integer greater than or equal to m; and a transceiver configured to send the first information.

[0090] In a possible implementation,

[0091] The transceiver is further configured to send third configuration information, the third configuration information being used for configuring n sets of reference signals, the n sets of reference signals including the first set of reference signals, the first set of reference signals being composed of the K reference signals.

[0092] In a possible implementation, the first information is further used for determining the K reference signals.

[0093] In a possible implementation, the first information includes first quasi co-location (QCL) information, the first QCL information being used for determining the m reference resources.

[0094] In a possible implementation, the transceiver module is further configured to send the K reference signals; and receive measurement results of the K reference signals, the measurement results of the K reference signals being obtained by performing measurement on the K reference signals.

[0095] Possible implementation of the communication apparatus of the eighth aspect can refer to possible implementation of the fourth aspect.

[0096] The technical effects brought by possible implementation of the eighth aspect can refer to the introduction of the technical effects of possible implementation of the fourth aspect.

[0097] In the ninth aspect, the embodiments of the present application provide another communication apparatus, which comprises one or more processors configured to process data and / or signaling so that the method of any one of the first aspect to the fourth aspect is implemented.

[0098] Optionally, the communication apparatus further comprises a memory configured to store computer programs or instructions, which, when executed by the processor, cause the communication apparatus to perform the method of any one of the first aspect to the fourth aspect. For example, the communication apparatus can be a chip, the processor can be a processing unit in the chip, and the memory can be a random access memory or a cache in the chip.

[0099] In the embodiments of the present application, in the process of executing the above method, the process of sending information (or signal) in the above method can be understood as the process of outputting information based on the computer programs or instructions of the processor. When the information is output, the processor outputs the information to the transceiver so as to be transmitted by the transceiver. After the information is output by the processor, it can also be processed in other ways and then reach the transceiver. Similarly, when the processor receives the input information, the transceiver receives the information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information can be processed in other ways and then input to the processor.

[0100] For the sending and / or receiving operations of the processor, if there is no special description, or if it does not contradict the actual role or inherent logic in the related description, it can be generally understood as output based on the computer programs or instructions of the processor.

[0101] In the implementation process, the processor can be a processor specially used for executing the methods, or a processor executing the computer programs or instructions in the memory to execute the methods, such as a general processor. For example, the processor can also be used to execute the programs stored in the memory, when the programs are executed, so that the communication apparatus executes the method shown in the first aspect or any possible implementation of the first aspect.

[0102] In a possible implementation, the memory is located outside the communication apparatus.

[0103] In a possible implementation, the processor and the memory can also be integrated into one device, i.e., the processor and the memory can also be integrated together.

[0104] In a possible implementation, the communication apparatus further includes a transceiver, which is configured to receive a signal or transmit a signal, etc.

[0105] In a tenth aspect, the present application provides another communication apparatus, which includes a logic circuit (or processing circuit) and an interface (or interface circuit) configured to input and / or output data; and the logic circuit is configured to execute the method in any one of the first aspect to the fourth aspect.

[0106] In an eleventh aspect, the present application provides a computer readable storage medium, which stores a computer program or instructions, and the computer program or instructions are executed to make a computer execute the method in any one of the first aspect to the fourth aspect.

[0107] In a twelfth aspect, the present application provides a computer program product, which, when running on a computer, makes the computer execute the method in any one of the first aspect to the fourth aspect. For example, the computer program product includes a computer program, which, when executed, makes the computer execute the method in any one of the first aspect to the fourth aspect.

[0108] In a thirteenth aspect, the present application provides a chip, which includes a communication interface and a processor; the communication interface is configured to transceive signals of the chip; and the processor is configured to execute a computer program or instructions, so that the chip executes the method in any one of the first aspect to the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0109] FIG. 1 shows a schematic diagram of a wide beam and a narrow beam;

[0110] FIG. 2A is a schematic diagram of a neuron structure provided by an embodiment of the present application;

[0111] FIG. 2B is a schematic diagram of a neural network structure provided by an embodiment of the present application;

[0112] FIG. 3A, FIG. 3B and FIG. 3C respectively show schematic diagrams of periodically sending CSI-RS;

[0113] FIG. 3D shows a schematic diagram of F CSI-RS resources configured by a set of parameters [m, F].

[0114] FIG. 4A and FIG. 4B are schematic diagrams of architecture of a communication system to which embodiments of the present application can be applied;

[0115] FIG. 4C is a schematic diagram of a possible application framework in a communication system;

[0116] FIG. 4D is a schematic diagram of a possible application framework in a communication system;

[0117] FIG. 5 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0118] FIG. 6 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0119] FIG. 7 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0120] FIG. 8 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0121] FIG. 9 is a schematic diagram of a structure of a communication apparatus 900 according to an embodiment of the present application;

[0122] FIG. 10 is a schematic diagram of a structure of another communication apparatus 1000 according to an embodiment of the present application;

[0123] FIG. 11 is a schematic diagram of a chip system architecture according to an embodiment of the present application. DETAILED DESCRIPTION

[0124] The terms “first” and “second” and the like in the description, claims, and drawings of the present application merely mean different objects and do not imply a specific order or sequence. It can be understood that various numbers referred to in the embodiments of the present application are merely used for differentiation and do not limit the scope of the embodiments of the present application. The magnitude of the serial numbers of the above processes does not mean the execution order, and the execution order of the processes should be determined according to their functions and inherent logic. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device, or the like that includes a list of steps or units is not limited to the listed steps or units, but can optionally further include other steps or units not listed or inherent to the process, method, product, or device, or the like. In the present application, the naming of messages is merely used to distinguish different messages and should not be construed as a limitation. That is, the name of any message in the present application can be replaced by other names, and the present application is not limited.

[0125] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those skilled in the art will appreciate from the present disclosure that embodiments described herein can be combined with other embodiments in various ways.

[0126] It can be understood that, in the present application, "… time" and "if" refer to the corresponding processing under certain objective conditions, not limited by time, and do not require judgment actions when the implementation is performed, nor does it mean that there are other limitations. In the present application, "… time", "if", "if", "in the case of" can be replaced with each other.

[0127] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects. Also, in some scenarios, they can be combined with other features according to needs. Correspondingly, the devices given in the embodiments of the present application can also implement these features or functions, which will not be described here. In the present application, the same or similar parts of each embodiment can be mutually referenced, unless otherwise specified. In the embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referenced, unless otherwise specified and logically conflicting. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship. The following embodiments of the present application do not constitute a limitation on the protection scope of the present application.

[0128] The terms used in the following embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to be limiting to the present application. As used in the specification and the appended claims of the present application, the singular forms "a," "an," and "the" are intended to include both singular and plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or" used in the present application mean any or all possible combinations of one or more listed items. For example, "A and / or B" can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The term "multiple" used in the present application means two or more. In the literal description of the present application, the character " / ", generally indicates that the associated objects before and after are in an "or" relationship.

[0129] It should be understood that, in the embodiments of the present application, "A corresponds to B" means that A can determine B according to A. However, it should also be understood that determining (or generating) B according to (or based on) A does not mean that B is determined (or generated) only according to (or based on) A, but B can also be determined (or generated) according to (or based on) A and / or other information.

[0130] It should be understood that, in the present application, the indication includes direct indication (also known as explicit indication) and implicit indication. Among them, the direct indication of information A means that the information A is included; the implicit indication of information A means that the information A is indicated by the corresponding relationship between the information A and the information B and the direct indication of the information B. Wherein, the corresponding relationship between information A and information B can be pre-defined, pre-stored, pre-burned, or pre-configured.

[0131] It should be understood that, in the present application, the determination of information C for information D includes that information D is determined based on information C, and information D is determined based on information C and other information. In addition, the determination of information C for information D can also be indirectly determined, such as the case that information D is determined based on information E, and information E is determined based on information C.

[0132] In addition, in the embodiments of the present application, "the network element A sends the information A to the network element B" can be understood as that the destination of the information A or the intermediate network element in the transmission path between the destination is the network element B, which can include direct or indirect sending of information to the network element B. "The network element B receives the information A from the network element A" can be understood as that the source of the information A or the intermediate network element in the transmission path between the source is the network element A, which can include direct or indirect receiving of information from the network element A. The information can be processed as necessary between the source and the destination of the information sending, for example, format change, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly, which will not be described here.

[0133] In the embodiments of the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, and also includes indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as "output" of chip interface, and "receiving" can also be understood as "input" of chip interface.

[0134] In other words, the sending and receiving can be between devices, such as between a network device and a user device (or terminal device), or can be within a device, such as between components, modules, chips, software modules or hardware modules within a device via a bus, wire or interface.

[0135] To facilitate understanding of the scheme of the present application, the terms and technical schemes involved in the embodiments of the present application are first introduced below.

[0136] 1. Beam: A beam is a kind of communication resource. The beam can be a wide beam, or a narrow beam, or other types of beams, and the technology for forming the beam can be beamforming technology or other technical means. The beamforming technology can be digital beamforming technology, analog beamforming technology and hybrid digital / analog beamforming technology. Different beams can be considered as different resources.

[0137] The beam can correspond to the instantaneous or statistical channel characteristics of the transmitted signal, such as delay spread, Doppler spread, Doppler shift, average delay, average gain, spatial receive parameters, spatial transport parameters. Among them, the spatial receive parameters or spatial transport parameters can include one or more of the following: angle of arrival (AOA), average AOA, AOA spread, angle of departure (AOD), average angle of departure AOD, AOD spread, receive antenna spatial correlation parameters, transmit antenna spatial correlation parameters, transmit beam, receive beam and resource identifier.

[0138] The beam can be referred to as a spatial domain filter, a spatial filter, a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, quasi-colocation (QCL) information, a QCL assumption, or a QCL indication, etc. The beam can be indicated by a transmission configuration indicator (TCI) state parameter, or a spatial relation parameter. Therefore, in this application, the beam can be replaced by a transmission direction, a transmission resource, a spatial domain filter, a spatial filter, a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, QCL information, a QCL assumption, a QCL indication, a TCI state (including an uplink TCI state and a downlink TCI state), or a spatial relation, etc. The beam can also be replaced by other terms representing the beam, which are not limited herein.

[0139] In this application, the beam used for transmitting a signal can be referred to as a transmission beam (Tx beam), a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, a spatial transmission parameter, a spatial domain transmission setting, or a spatial transmission setting. The transmission beam can be indicated by a TCI-state.

[0140] In this application, the beam for receiving signals can be referred to as a reception beam (Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter or a spatial reception parameter, a spatial domain reception setting, or a spatial reception setting.

[0141] A transmission beam can refer to the distribution of signal strength in different directions in space after a signal is transmitted by an antenna, and a reception beam can refer to the distribution of signal strength in different directions in space of a wireless signal received by an antenna.

[0142] A beam is generally associated with a resource. For example, when performing beam measurement, the network device measures different beams through different resources, and the user equipment feeds back the measured resource quality, so that the network device knows the quality of the corresponding beam. When data transmission, the beam can also be indicated by its corresponding resource. For example, the network device indicates a transmission configuration indication-state (TCI-state) through the transmission configuration index (TCI) field in the downlink control information (DCI), and the user equipment determines the beam corresponding to the reference resource according to the reference resource contained in the TCI-state. Different beams can be considered as different resources, and the same information or different information can be transmitted using (or through) different beams.

[0143] Optionally, multiple beams with the same or similar communication characteristics are considered as one beam. One beam can include one or more antenna ports for transmitting data channels, control channels, and sounding signals, etc. One or more antenna ports forming a beam can also be regarded as an antenna port set.

[0144] 2. Beam management: Beam management refers to the process of periodically identifying (or selecting) the best beam by the user equipment and the network equipment. In order to achieve beam management, the existing scheme reduces the overhead of beam scanning by hierarchical scanning, i.e., first scanning a wide beam, and then scanning a small part of narrow beams under the wide beam, thereby achieving the goal of reducing the overhead. Figure 1 shows a schematic diagram of a wide beam and a narrow beam. As shown in Figure 1, the coverage of the wide beam is larger than that of the narrow beam.

[0145] The selection of beams is mainly completed by reference signals and corresponding beam measurement. Specifically, the reference signals mainly include synchronization signal blocks (SSBs) and channel state information-reference signals (CSI-RSs). The SSB is a cell broadcast signal, containing a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), and a de-modulation reference signal (DMRS). The SSB is periodically transmitted according to a cell configuration, and its function is not only used for beam management, but also used for initial access, time-frequency synchronization, etc. It can be considered that the SSB is a wide-beam signal, i.e., a signal transmitted through a wide beam. Correspondingly, the CSI-RS is a user-level signal, and the network device configures one or more groups of CSI-RS resources for a user equipment according to actual conditions. Similarly, the CSI-RS is not only used for beam management, but also used for channel quality measurement, etc. It can be considered that the CSI-RS is a narrow-beam signal, i.e., a signal transmitted through a narrow beam. In this application, the network device, the network side, and the network side device can be replaced with each other.

[0146] The traditional beam management performs two-stage beam scanning: the first stage scans SSBs, i.e., SSBs are transmitted through different wide beams. In this stage, a user equipment (UE) measures and feeds back, to a network device, reference signal received power (RSRP) of the SSBs transmitted through different wide beams; and the second stage is that the network device screens out a wide beam corresponding to an SSB with the largest RSRP according to the RSRP of the SSBs transmitted through different wide beams reported by the UE, and configures a CSI-RS resource for the UE to scan narrow beams under coverage of the wide beam corresponding to the SSB to determine an optimal beam. In this application, the wide beam corresponding to the SSB refers to a wide beam through which the SSB is transmitted, i.e., the SSB is transmitted through the wide beam corresponding thereto.

[0147] In a process of configuring a CSI-RS resource scanning narrow beam by the network device for the UE, the network device sends TCI state indication information containing QCL information to indicate the UE to receive with a fixed wide beam. The UE feeds back the measurement result to the network device, and the network device determines the best beam for subsequent data transmission according to the measurement result. Each TCI state can include a reference signal resource identifier. The reference signal resource identifier can be at least one of the following: a non-zero power (NZP) channel state information (channel state information reference signal, CSI-RS) resource identifier (NZP-CSI-RS-ResourceId) or an SSB index (SSB-index).

[0148] Meanwhile, in recent years, the artificial intelligence (AI) technology has made remarkable achievements in reducing the beam scanning overhead. The AI-based beam management usually takes the results obtained by part of the beam scanning, such as the RSRP of the SSB transmitted by the UE through different wide beams, as the input of the AI model, and the output of the AI model is the beam index of the best beam or multiple beam indices (e.g., K), wherein the multiple beam indices refer to the beam index numbers of the best K candidate beams predicted by the AI model. K is an integer greater than 1.

[0149] The AI-based beam management performs two-stage beam scanning: the first stage scans SSB, i.e., transmits SSB through different wide beams, and in this stage, the UE reports the measurement result to the network device, and the network device obtains the input of the AI model; the second stage takes the measurement results of the SSB transmitted through different wide beams as the input of the AI model, and infers the Top-K candidate beams (i.e., K candidate beams), and the network device performs CSI-RS scanning according to the Top-K candidate beams to determine the best beam.

[0150] 3. Quasi-co-location (QCL): Quasi-co-location (or quasi-co-located) relationship is used to indicate that multiple resources have one or more same or similar communication characteristics. For multiple resources with quasi-co-location relationship, the same or similar communication configuration can be used. Alternatively, the definition of quasi-co-location can be that the channel characteristics experienced by a signal on one antenna port can be derived from the channel experienced by a signal on another antenna port, then the two antenna ports are considered to be QCL, and the reference signal (RS) transmitted on the two antenna ports is with QCL relationship. For example, if two antenna ports have quasi-co-location relationship, then the channel large-scale characteristics of one port transmitting a symbol can be inferred from the channel large-scale characteristics of another port transmitting a symbol. The large-scale characteristics can include: delay spread, average delay, Doppler spread, Doppler shift, average gain, reception parameters, user equipment reception beam number, transmission / reception channel correlation, reception angle of arrival, spatial correlation of receiver antenna, main angle of arrival (AoA), average angle of arrival, spread of AoA, etc. For another example, if two beams have quasi-co-location relationship, then the reception beam corresponding to one beam can be inferred from the reception beam corresponding to another beam.

[0151] The QCL type can be one of {typeA, typeB, typeC, typeD}, a single QCL type can correspond to a combination of one or more channel characteristics, and the channel characteristics can include: Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, etc. The QCL types are described in detail as follows, wherein:

[0152] The channel characteristics of typeA can be: {Doppler shift, Doppler spread, average delay, delay spread};

[0153] The channel characteristics of typeB can be: {Doppler shift, Doppler spread};

[0154] The channel characteristics of typeC can be: {Doppler shift, average delay};

[0155] The channel characteristics of typeD can be: {spatial reception parameters}.

[0156] According to the above, when two antenna ports have a QCL relationship in a certain QCL type, the channels experienced by the signals on the two antenna ports are considered to be the same in the channel characteristics corresponding to the QCL type. Taking QCL type D as an example, the channel characteristics of the QCL type correspond to spatial receiving parameters, and therefore, when two antenna ports have a QCL relationship in type D, the channels experienced by the signals on the two antenna ports are considered to have the same spatial receiving parameters. It can be understood that the QCL relationship referred to in the embodiments of the present application can be type D.

[0157] 4. Transmission configuration indicator (TCI): also known as TCI state (TCI-State). A TCI state includes one or two QCL relationships, which represent a certain consistency relationship between the current to-be-received signal / channel and a previously known reference signal. If there is a QCL relationship, the user equipment can inherit the receiving or transmitting parameters when receiving or transmitting a certain reference signal to receive or transmit the to-be-received signal / channel. Each TCI state can correspond to a beam.

[0158] In some technical solutions, the network device configures the TCI state for the user equipment through a radio resource control (RRC) message. The network device can send a MAC-CE to the user equipment, and the MAC-CE is used to activate one or more TCI states configured by the network device for the user equipment. Optionally, the network device can further send a DCI to the user equipment, and the DCI is used to indicate a TCI state activated by the MAC-CE.

[0159] 5. AI and machine learning (ML): Machine learning is an important technical approach to realize AI. Machine learning can be divided into supervised learning, unsupervised learning, and reinforcement learning.

[0160] Supervised learning learns the mapping relationship between sample values and sample labels according to the collected sample values and sample labels, and uses a machine learning model to express the learned mapping relationship. The process of training the machine learning model is the process of learning the mapping relationship. In signal detection, the noisy received signal is the sample, and the true constellation point corresponding to the signal is the label. Machine learning is expected to learn the mapping relationship between the sample and the label through training, that is, to learn a signal detector. During training, the model parameters are optimized by calculating the error between the predicted value of the model and the true label. Once the mapping relationship is learned, the learned mapping relationship can be used to predict the sample label of each new sample. The learned mapping relationship of supervised learning can include linear mapping and nonlinear mapping. According to the type of label, the learned task can be divided into classification tasks and regression tasks.

[0161] Unsupervised learning only uses algorithms to explore the internal patterns of samples according to the collected sample values. In unsupervised learning, a class of algorithms uses the sample itself as a supervision signal, that is, the model learns the mapping relationship from the sample to the sample, which is called self-supervised learning. During training, the model parameters are optimized by calculating the error between the predicted value of the model and the sample itself. Self-supervised learning can be used in signal compression and decompression recovery applications. Common algorithms include autoencoders and generative adversarial networks.

[0162] Reinforcement learning is different from supervised learning and is a class of algorithms that learn strategies to solve problems by interacting with the environment. Unlike supervised and unsupervised learning, reinforcement learning problems do not have explicit "correct" action label data. The algorithm needs to interact with the environment to obtain the reward signal of the environment feedback, and then adjust the decision action to obtain a larger reward signal value. In the following power control, the reinforcement learning model adjusts the downlink transmission power of each user according to the system total throughput rate feedback by the wireless network, and then expects to obtain a higher system throughput rate. The goal of reinforcement learning is also to learn the mapping relationship between the environment state and the optimal decision action. However, because the "correct action" label cannot be obtained in advance, the network cannot be optimized by calculating the error between the action and the "correct action". Reinforcement learning training is achieved through iterative interaction with the environment.

[0163] Deep neural network (DNN) is a specific implementation form of machine learning. According to the universal approximation theorem, neural networks can theoretically approximate any continuous function, so that neural networks have the ability to learn any mapping. Traditional communication systems need to rely on rich expert knowledge to design communication modules, while deep learning communication systems based on DNN can automatically discover the implicit pattern structure from a large amount of data set, establish the mapping relationship between the data, and obtain better performance than traditional modeling methods.

[0164] The idea of DNN comes from the neuron structure of the brain tissue. Each neuron performs a weighted sum operation on its input values and generates an output through a nonlinear function, as shown in FIG. 2A. FIG. 2A is a schematic diagram of a neuron structure provided in an embodiment of the present application. Referring to FIG. 2A, assume that the input of the neuron is x = [x0, …, xN-1], the weight corresponding to the input is w = [w0, …, wN-1], the bias of the weighted sum is b, and the form of the nonlinear function can be diversified, one example is max{0, x}, that is, the maximum value function, then the effect of the neuron can be n . n . DNN generally has a multi-layer structure, each layer of the DNN can include multiple neurons, and the received values are transmitted to the intermediate hidden layer after being processed by the neurons in the input layer. Similarly, the hidden layer transmits the calculation results to the last output layer to generate the final output of the DNN, as shown in FIG. 2B. FIG. 2B is a schematic diagram of a neural network structure provided in an embodiment of the present application.

[0165] DNN generally has more than one hidden layer, and the hidden layer often directly affects the ability to extract information and fit functions. Increasing the number of hidden layers of the DNN or expanding the width of each layer can improve the function fitting ability of the DNN. The weight value in each neuron is the parameter of the DNN network model. The model parameters are optimized through the training process, so that the DNN network has the ability to extract data features and express mapping relationships. DNN generally uses supervised learning or unsupervised learning strategies to optimize model parameters.

[0166] According to the construction mode of the neural network, the DNN can be divided into a feedforward neural network (FNN), a convolutional neural network (CNN), and a recurrent neural network (RNN). The one shown in FIG. 2B is a FNN network, and its characteristic is that the neurons in adjacent layers are completely connected two by two, which makes the FNN usually need a large amount of storage space and leads to high computational complexity.

[0167] CNN is a kind of neural network specially designed to deal with data with similar grid structure. For example, time series data (time axis discrete sampling) and image data (two-dimensional discrete sampling) can be considered as similar grid structure data. CNN does not use all input information at once for operation, but uses a fixed size window to intercept part of the information for convolution operation, which greatly reduces the calculation of model parameters. In addition, according to the different types of window intercepted information (such as people and objects in the same picture are different types of information), each window can use different convolution kernel operation, which makes CNN better extract the features of input data.

[0168] RNN is a kind of DNN network that uses feedback time series information. Its input includes the new input value at the current time and the output value of itself at the previous time. RNN is suitable for obtaining sequence characteristics with temporal correlation, and is particularly suitable for speech recognition, channel coding and decoding and other applications.

[0169] The above FNN, CNN and RNN are common neural network structures, which are all constructed based on neurons. As mentioned above, each neuron performs weighted summation operation on its input value, and the weighted summation result is generated through a nonlinear function to produce output. We call the weights of the weighted summation operation of neurons in the neural network and the nonlinear function as the parameters of the neural network. Taking the neuron with max{0, x} as the nonlinear function as an example, the operation of the neuron is The parameters of the neuron performing the operation are weights w = [w0, …, w n ], the bias of the weighted summation is b, and the nonlinear function is max{0, x}. The parameters of all neurons in a neural network constitute the parameters of the neural network.

[0170] 6. Configuration of CSI-RS measurement resource and feedback configuration of CSI report: In the existing protocol, the configuration of CSI-RS measurement resource and the feedback of CSI report all support three configuration modes of periodic, semi-static and aperiodic.

[0171] In the periodic CSI-RS configuration, the network side configures the transmission period (for example, every N slots) and offset (symbol offset within the period) of the CSI-RS and notifies the UE, and transmits according to the configured transmission period and offset. FIG. 3A, FIG. 3B and FIG. 3C respectively show the schematic diagram of periodic transmission of CSI-RS. In FIG. 3A, FIG. 3B and FIG. 3C, the rectangular area filled with gray represents the time domain resource occupied by the CSI-RS. In FIG. 3A, the transmission period of the CSI-RS is 5 slots, and the offset is 0. In FIG. 3B, the transmission period of the CSI-RS is 5 slots, and the offset is 3. In FIG. 3C, the transmission period of the CSI-RS is 10 slots, and the offset is 3.

[0172] In the semi-static CSI-RS configuration, the network configures the transmission period (every N slots) and offset (symbol offset within the period) of the CSI-RS and informs the UE, but whether to actually transmit is determined by the MAC CE. The MAC CE activates / deactivates the CSI-RS transmission and informs the UE.

[0173] In the aperiodic CSI-RS configuration, the UE is informed of each CSI-RS transmission by DCI signaling, and the aperiodic CSI RS configuration also supports the transmission of multiple CSI RS resources configured at a time, for example, configured by a set of parameters [m, F], m is the interval of the CSI-RS resource, and F is the number of CSI-RS resources, as shown in the following FIG. 3D. FIG. 3D shows a schematic diagram of F CSI-RS resources configured by a set of parameters [m, F]. F is an integer greater than 1.

[0174] In the foregoing, in the introduction of the beam management related content, it is introduced that in the traditional beam management scheme, the network device selects the wide beam corresponding to the SSB with the maximum RSRP according to the RSRP of the SSBs transmitted by different wide beams reported by the UE, and configures the CSI-RS resource for the UE to scan the narrow beams under the coverage of the wide beam corresponding to the SSB to determine the best beam. That is, in the traditional beam management scheme, in the second stage, the network device scans the narrow beams under the coverage of the same wide beam, that is, each narrow beam scanned by the network device in the second stage is derived from the same wide beam.

[0175] Unlike the traditional beam management scheme, in the AI-based beam management scheme, the Top-K candidate beams obtained by the network device in the second stage may be derived from different wide beams, so it is necessary to study how to make the UE know the receiving beam corresponding to each candidate beam in the Top-K candidate beams, and then realize the scanning of the narrow beam. The present application provides a scheme that can make the UE know the receiving beam corresponding to each candidate beam in the Top-K candidate beams to be scanned by the network device, which can be applied in the AI-based beam management scheme, and can effectively reduce the scanning overhead. Or, the present application provides an AI-based beam management scheme, in which the network device makes the UE know the receiving beam corresponding to each candidate beam in the Top-K candidate beams to be scanned by the network device by sending first indication information to the UE; which can effectively reduce the scanning overhead. The following introduces the communication system to which the technical scheme provided by the present application is applicable.

[0176] The technical solutions provided in the present application can be applied to various communication systems, for example: a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a wireless local area network (WLAN) system, a satellite communication system, a future communication system such as a 6th generation (6G) mobile communication system, or a converged system of multiple systems, and the like. The technical solutions provided in the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication systems or other communication systems. The communication systems to which the technical solutions provided in the present application are applicable are merely examples, and the communication systems to which the technical solutions provided in the present application are applicable are not limited to this. It is uniformly described here that the communication systems to which the technical solutions provided in the present application are applicable are not limited to this, and the following will not be described in detail.

[0177] A network element in a communication system can send a signal to another network element or receive a signal from another network element. The signal can include information, signaling, or data, etc. The network element can also be replaced by an entity, a network entity, a device, a communication device, a communication module, a node, a communication node, etc. The present disclosure describes the network element as an example. For example, the communication system can include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device. It can be understood that the terminal device in the present disclosure can be replaced by a first network element, and the network device can be replaced by a second network element, both of which perform the corresponding communication method in the present disclosure.

[0178] FIG. 4A and FIG. 4B are schematic diagrams of architectures of a communication system to which embodiments of the present application can be applied. As shown in FIG. 4A and FIG. 4B, the communication system includes a network device 110, a terminal device 120 and a terminal device 130. Embodiments of the present application can be applied to a communication system including one or more terminal devices, taking the terminal device 120 and the terminal device 130 as examples of the terminal devices in the communication system. FIG. 4A and FIG. 4B are only schematic diagrams, and the number of network devices and terminal devices included in the communication system is not limited in embodiments of the present application.

[0179] The terminal device 120 and the terminal device 130 can access the network device 110 and communicate with the network device 110. In addition, as shown in FIG. 4B, the communication system can further include an AI entity 100, and the network device can forward the data related to the AI model reported by the terminal device to the AI entity, and the AI entity can perform operations related to AI such as training data set construction and model training, and output the trained neural network model, model evaluation, test results and other AI related operation outputs of the AI entity to each terminal device through the network device. If the AI entity is located inside the network device, that is, the AI entity is a module in the network device, the system architecture is as shown in FIG. 4A.

[0180] In embodiments of the present application, the terminal device can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus.

[0181] The terminal device can be a device providing voice / data, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phone, tablet computer, notebook computer, palm computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, wearable device, terminal device in a 5G network, or terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0182] By way of example and not limitation, in the embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a device that realizes powerful functions through software support and data interaction and cloud interaction. The general wearable smart device includes devices with full functions, large size, and the ability to realize complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, and devices that focus on a certain application function and need to be used in cooperation with other devices, such as smart phones, such as various smart wristbands and smart jewelry for monitoring vital signs.

[0183] In the embodiments of the present application, the apparatus for implementing the function of the terminal device can be a terminal device, or can be an apparatus capable of supporting the terminal device to implement the function, for example, a chip system, which can be installed in the terminal device or used in matching with the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include the chip and other discrete devices. In the embodiments of the present application, only the apparatus for implementing the function of the terminal device is taken as an example for description, and the scheme of the embodiments of the present application is not limited in this way.

[0184] The network device in the embodiments of the present application can be a device for communicating with a terminal device, and the network device can also be referred to as an access network device or a radio access network device, for example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: RAN node, Node B, evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), radio unit (RU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip used in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a 6G network, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). The embodiments of the present application do not limit the specific technology and specific device form of the network device.

[0185] A base station can be fixed, or mobile. For example, a helicopter or unmanned aerial vehicle can be configured to function as a mobile base station, one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or unmanned aerial vehicle can be configured to function as a device that communicates with another base station.

[0186] In some deployments, the network device mentioned in embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)) and a DU node. For example, the network device can include a gNB-CU-CP, a gNB-CU-UP and a gNB-DU.

[0187] In some deployments, a plurality of RAN nodes cooperate to assist a terminal to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a CU, a DU, a CU-CP, a CU-UP, or an RU, etc. The CU and the DU can be separately arranged, or can also be included in the same network element, for example, in a BBU. The RU can be included in a radio frequency device or a radio frequency unit, for example, included in an RRU, an AAU or an RRH.

[0188] The RAN node can support one or more types of fronthaul interfaces, different fronthaul interfaces respectively corresponding to DUs and RUs having different functions. If the fronthaul interface between the DU and the RU is a common public radio interface (CPRI), the DU is configured to implement one or more of baseband functions, and the RU is configured to implement one or more of radio frequency functions. If the fronthaul interface between the DU and the RU is another interface, which, relative to the CPRI, moves one or more of partial baseband functions of the downlink and / or uplink, such as, for the downlink, one or more of precoding, digital beamforming (BF), or inverse fast Fourier transform (IFFT) / add cyclic prefix (CP), from the DU to the RU for implementation, and for the uplink, one or more of digital beamforming (BF), or fast Fourier transform (FFT) / remove cyclic prefix (CP), from the DU to the RU for implementation. In a possible implementation, the interface can be an enhanced common public radio interface (eCPRI). Under the eCPRI architecture, the splitting manner between the DU and the RU is different, corresponding to different categories (Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, and F.

[0189] Taking eCPRI Cat A as an example, for downlink transmission, with layer mapping as the cut, the DU is configured to implement layer mapping and one or more functions (i.e., one or more of encoding, rate matching, scrambling, modulation, layer mapping) before layer mapping, while other functions (e.g., one or more of RE mapping, digital beamforming (BF), or inverse fast Fourier transform (IFFT) / addition of cyclic prefix (CP)) after layer mapping are implemented in the RU. For uplink transmission, with de-RE mapping as the cut, the DU is configured to implement de-mapping and one or more functions (i.e., one or more of decoding, de-rate matching, de-scrambling, de-modulation, inverse discrete Fourier transform (IDFT), channel equalization, de-RE mapping) before de-mapping, while other functions (e.g., one or more of digital BF or fast Fourier transform (FFT) / CP removal) after de-mapping are implemented in the RU. It can be understood that the function description of the DU and the RU corresponding to various types of eCPRI can refer to the eCPRI protocol, which is not described here.

[0190] In a possible design, the processing unit in the BBU for implementing baseband functions is referred to as a base band high (BBH) unit, and the processing unit in the RRU / AAU / RRH for implementing baseband functions is referred to as a base band low (BBL) unit.

[0191] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0192] In the embodiments of the present application, the apparatus for implementing the function of the network device can be the network device, or can be an apparatus capable of supporting the network device to implement the function, for example, a chip system, a hardware circuit, a software module, or a hardware circuit plus a software module. The apparatus can be installed in the network device or used in combination with the network device. In the embodiments of the present application, only the apparatus for implementing the function of the network device is taken as an example for description of the network device, and the scheme of the embodiments of the present application is not limited.

[0193] It should be noted that the network architecture described in the embodiments of the present application is for more clearly illustrating the technical scheme of the embodiments of the present application, and does not constitute a limitation on the technical scheme provided by the embodiments of the present application. It can be known by those skilled in the art that, with the evolution of the network architecture and the emergence of new business scenarios, the technical scheme provided by the embodiments of the present application is also applicable to similar technical problems.

[0194] In the embodiments of the present application, the apparatus for implementing the function of the network device can be the network device, or can be an apparatus capable of supporting the network device to implement the function, for example, a chip system. The apparatus can be installed in the network device or used in combination with the network device. In the following embodiments, the apparatus for implementing the function of the network device is taken as the network device, and the power control scheme provided by the embodiments of the present application is described taking the network device as a base station.

[0195] In order to support AI technology in the wireless network, an AI node can also be introduced in the network.

[0196] Optionally, the AI node can be deployed in one or more of the following positions in the communication system: an access network device, a terminal device, or a core network device, etc., or the AI node can also be deployed separately, for example, in a position other than any of the above devices, such as a host or a cloud server of an over the top (OTT) system. The AI node can communicate with other devices in the communication system, which can be one or more of the following: a network device, a terminal device, or a network element of a core network, etc.

[0197] It can be understood that the number of AI nodes is not limited in the present application. For example, when there are multiple AI nodes, the multiple AI nodes can be divided based on functions, for example, different AI nodes are responsible for different functions.

[0198] It can also be understood that the AI node can be a device independent of each other, can be integrated in the same device to implement different functions, or can be a network element in a hardware device, or can be a software function running on a dedicated hardware, or a virtualized function instantiated on a platform (for example, a cloud platform), and the specific form of the AI node is not limited in the present application.

[0199] An AI node can be an AI network element or an AI module.

[0200] FIG. 4C is a schematic diagram of a possible application framework in a communication system. As shown in FIG. 4C, network elements in the communication system are connected through interfaces (e.g., NG, Xn) or air interfaces. One or more AI modules (only one is shown in FIG. 4C for clarity) are deployed in one or more of the network element nodes, such as a core network device, an access network node (RAN node), a terminal, or an OAM. The access network node can be a single RAN node or can include multiple RAN nodes, such as a CU and a DU. The CU and / or the DU can also be provided with one or more AI modules. Optionally, the CU can be further split into a CU-CP and a CU-UP. One or more AI modules are deployed in the CU-CP and / or the CU-UP.

[0201] The AI modules are configured to implement corresponding AI functions. AI modules deployed in different network elements can be the same or different. AI modules can implement different functions according to different parameter configurations of the models of the AI modules. The models of the AI modules can be configured based on one or more of the following parameters: a structural parameter (e.g., at least one of a number of neural network layers, a width of a neural network, a connection relationship between layers, a weight of a neuron, an activation function of a neuron, or a bias in the activation function), an input parameter (e.g., a type of the input parameter and / or a dimension of the input parameter), or an output parameter (e.g., a type of the output parameter and / or a dimension of the output parameter). The bias in the activation function can also be referred to as a bias of the neural network.

[0202] An AI module can have one or more models. A model can infer an output including one parameter or multiple parameters. The learning process, the training process, or the inference process of different models can be deployed in different nodes or devices or can be deployed in the same node or device.

[0203] FIG. 4D is a schematic diagram of a possible application framework in a communication system. As shown in FIG. 4D, a RAN intelligent controller (RIC) is included in the communication system. The RIC can be the AI module 117, 118 shown in FIG. 4C, for example, and is configured to implement AI-related functions. The RIC includes a near-real time RIC (near-RT RIC) and a non-real time RIC (Non-RT RIC). The Non-RT RIC is mainly configured to process non-real-time information, such as data that is not sensitive to latency and has a latency of seconds. The near-RT RIC is mainly configured to process near-real-time information, such as data that is relatively sensitive to latency and has a latency of tens of milliseconds.

[0204] The near real-time RIC is used for model training and inference. For example, the AI model is trained, and inference is performed using the AI model. The near real-time RIC can obtain network side and / or terminal side information from the RAN node (for example, CU, CU-CP, CU-UP, DU and / or RU) and / or terminal. The information can be used as training data or inference data. Optionally, the near real-time RIC can submit the inference result to the RAN node and / or terminal. Optionally, the inference result can be exchanged between the CU and the DU, and / or between the DU and the RU. For example, the near real-time RIC submits the inference result to the DU, and the DU sends it to the RU.

[0205] The non-real-time RIC is also used for model training and inference. For example, the AI model is trained, and inference is performed using the AI model. The non-real-time RIC can obtain network side and / or terminal side information from the RAN node (for example, CU, CU-CP, CU-UP, DU and / or RU) and / or terminal. The information can be used as training data or inference data, and the inference result can be submitted to the RAN node and / or terminal. Optionally, the inference result can be exchanged between the CU and the DU, and / or between the DU and the RU. For example, the non-real-time RIC submits the inference result to the DU, and the DU sends it to the RU.

[0206] The near real-time RIC and the non-real-time RIC can also be separately provided as a network element. Optionally, the near real-time RIC and the non-real-time RIC can also be part of other devices. For example, the near real-time RIC is provided in the RAN node (for example, CU, DU), and the non-real-time RIC is provided in the OAM, cloud server, core network device, or other network device.

[0207] It can be understood that the specific structure of the execution subject of the method provided in the embodiments of the present application is not particularly limited, as long as the program recording the code of the method provided in the embodiments of the present application can be run to communicate according to the method provided in the embodiments of the present application. The method provided in the embodiments of the present application can be applied to communication between network devices, communication between terminal devices and network devices, and communication between terminal devices. Hereinafter, the interaction between the terminal device and the network device (for example, the base station) is taken as an example for description.

[0208] The method provided in the embodiments of the present application is described below.

[0209] FIG. 5 is a flow diagram of a communication method provided in the embodiments of the present application. The description of the network device and the terminal device involved in FIG. 5 can be referred to the above, and will not be described in detail here. As shown in FIG. 5, the method includes:

[0210] 501、The network device generates first indication information according to the K reference signals to be sent.

[0211] The first indication information is used to indicate information of the first reference signal resource set. The information of the first reference signal resource set can include one or more of the following corresponding to the first reference signal resource set: identification information, resource time-frequency code space resource configuration information, port information, transmission power information, periodicity information, density information, QCL information; wherein the identification information can be identification information of the first reference signal resource set, or can include identification information of each reference signal resource in the first reference signal resource set, and the QCL information can be QCL information corresponding to each reference signal resource in the first reference signal resource set. The first reference signal resource set includes at least one reference signal resource. The K reference signals are reference signals corresponding to K candidate beams (i.e. Top-K candidate beams) to be scanned (or said to be sent) by the network device. Or in other words, the network device is to scan K candidate beams by sending the K reference signals, each reference signal corresponding to a candidate beam. The K reference signal resources in the first reference signal resource set correspond to the K reference signals. As an example, the first reference signal resource set includes K reference signal resources, which correspond one-to-one to the K reference signals, i.e. each reference signal corresponds to one reference signal resource in the first reference signal resource set. Each reference signal is sent on its corresponding reference signal resource. K is an integer greater than 1. The reference signal resources in the first reference signal resource set correspond to periodic reference signal resources, or semi-persistent reference signal resources, or aperiodic reference signal resources. In this application, SSB stands for synchronization signal and PBCH block (synchronization signal and PBCH block), and SSB contains primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH). The reference signal includes demodulation reference signal (DMRS), tracking reference signal (TRS), CSI-RS, and or positioning reference signal (PRS).

[0212] The network device generates the first indication information according to the K reference signals to be transmitted, which can be replaced by: the network device generates the first indication information according to K candidate beams; wherein each candidate beam corresponds to a reference signal, or in other words, each candidate beam corresponds to a reference signal resource. Alternatively, the network device generates the first indication information according to the K reference signals to be transmitted, which can be replaced by: the network device generates the first indication information according to K candidate reference signal resources, each of the K candidate reference signal resources corresponds to a candidate beam, and the reference signal resources in the first reference signal resource set are the K candidate reference signal resources.

[0213] 502. The network device sends the first indication information to the terminal device.

[0214] Correspondingly, the terminal device receives the first indication information from the network device.

[0215] In a possible implementation, the first indication information is carried in the DCI and / or the MAC CE, or in other words, the first indication information corresponds to the DCI and / or the MAC CE; thereby the reference signal resource set required for the terminal device to perform measurement can be dynamically indicated. Some bits in the DCI and the MAC CE can be flexibly configured to carry the first indication information. Optionally, the first indication information reuses one or more fields in the DCI to indicate the information of the first reference signal resource set, the one or more fields include one or more of the following: a new data indicator (NDI) field, a redundancy version (RV) field, a hybrid automatic repeat request (HARQ) field, or a CSI request field. Optionally, the first indication information is carried in the MAC CE, and the first indication information reuses one or more fields in the DCI to indicate the information of the first reference signal resource set. Optionally, the first indication information is carried in the DCI and the MAC CE, for example, the fields in the MAC CE and the fields in the DCI jointly indicate the information of the first reference signal resource set.

[0216] 503. The network device performs beam sweeping according to the reference signal resources corresponding to the K candidate beams respectively, and correspondingly, the terminal device performs measurement based on at least one reference signal resource in the first reference signal resource set to determine the first measurement result.

[0217] The reference signal resources corresponding to the K candidate beams are reference signal resources in the first reference signal resource set. The network device performs beam sweeping according to the reference signal resources corresponding to the K candidate beams can be that the network device respectively sends corresponding reference signals according to the reference signal resources corresponding to the K candidate beams, wherein each candidate beam corresponds to a reference signal. Step 503 is the second stage of scanning the K candidate beams. In a possible implementation manner, the order of sending the K reference signals corresponding to the K candidate beams by the network device is predefined or preconfigured, or can be negotiated by the network device and the terminal device. That is, after the terminal device receives the first indication information, the terminal device can know the order of sending the K reference signals corresponding to the K candidate beams by the network device.

[0218] After receiving the first indication information, the terminal device determines the first reference signal resource set according to the first indication information, and then performs measurement based on at least one reference signal resource in the first reference signal resource set to determine (or obtain) the first measurement result. The implementation manner of the terminal device determining the first reference signal resource set according to the first indication information can refer to the above examples, which will not be described here. In a possible implementation manner, the terminal device first determines the reception beam corresponding to each reference signal resource in the first reference signal resource set, then receives the reference signal corresponding to each reference signal resource through the reception beam corresponding to each reference signal resource respectively, and measures the RSRP of the reference signal to obtain the first measurement result. The first measurement result is obtained based on the measurement of at least one reference signal resource in the first reference signal resource set. As an example, the first measurement result includes the RSRP of each reference signal (such as CSI-RS) corresponding to the K candidate beams.

[0219] In a possible implementation manner, the first reference signal resource set corresponds to a first effective time, and the first effective time corresponds to a first CSI report corresponding to the first measurement result. The first effective time is a predefined or preconfigured effective time. The first effective time corresponds to the first CSI report corresponding to the first measurement result can be that the time unit in which the control information for triggering or configuring the first CSI report is located is within the first effective time, or the time unit in which the CSI report information corresponding to the first CSI report is located is within the first effective time, or the time domain resource corresponding to the first reference signal resource set is within the first effective time. In a possible implementation manner, the terminal device ignores the first reference signal resource set in the case that the terminal device generates a CSI report after the first effective time. In a possible implementation manner, the terminal device generates a CSI report according to a second reference signal resource set in the case that the terminal device generates a CSI report after the first effective time.

[0220] In a possible implementation, the reference signal resources for determining the first measurement result include none of the reference signal resources other than the reference signal resources in the first reference signal resource set. Before receiving the first indication information, the terminal device receives first configuration information, and the first configuration information sets that a channel measurement time restriction corresponding to a first CSI report corresponding to the first measurement result is not configured. The channel measurement time restriction corresponding to the first CSI report not being configured (or being configured as not-configured) represents that the terminal device is allowed to perform cross-period filtering for the first CSI report. The channel measurement time restriction corresponding to the first CSI report being configured as configured represents that the terminal device is not allowed to perform cross-period filtering for the first CSI report. In this implementation, if the first quasi-co-location information is received in the case where the network device configures the terminal device to be allowed to perform cross-period filtering, cross-period filtering is not performed for the first CSI report corresponding to the first quasi-co-location information. As an example, the reference signal resources in the first reference signal resource set are the latest reference signal resources included in reference signal resources configured for the reference signal resources corresponding to the first CSI report, and are not later than the latest reference signal resource of CSI reference signal resources.

[0221] In a possible implementation, the terminal device further performs the following operation: the terminal device performs measurement based on at least one reference signal resource to obtain a second measurement result, and the at least one reference signal resource does not include the reference signal resources in the first reference signal resource set. The channel measurement time restriction corresponding to a second CSI report corresponding to the second measurement result is disabled. The reference signal resource configuration identifier corresponding to the second measurement result is the same as the reference signal resource configuration identifier corresponding to the first reference signal resource set.

[0222] 504. The terminal device sends the first measurement result to the network device.

[0223] Correspondingly, the network device receives the first measurement result from the terminal device. Step 504 is optional.

[0224] In some possible embodiments, the network device can send or can not send the first indication information. If the terminal device receives the first indication information, the terminal device reports the first measurement result, and the first measurement result is obtained by measuring at least one reference signal resource in the first reference signal resource set. If the terminal device does not receive the first indication information, the terminal device reports the second measurement result, and the second measurement result is obtained by measuring at least one reference signal resource in the second reference signal resource set.

[0225] In the embodiments of the present application, the terminal device receives first indication information, the first indication information being used to indicate information of a first reference signal resource set, so as to enable the UE to know a receiving beam corresponding to each candidate beam in the Top-K candidate beams to be scanned by the network device; and the scanning overhead can be effectively reduced.

[0226] The following describes possible implementation manners and specific examples of the first indication information being used to indicate information of the first reference signal resource set.

[0227] In a possible implementation manner, the first indication information and second reference signal resource set jointly indicate the information of the first reference signal resource set. The first reference signal resource set is a subset of the second reference signal resource set, or the second reference signal resource set is a subset of the first reference signal resource set, or the first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set is the second reference signal resource set. The second reference signal resource set is a set of candidate reference signal resources, and the second reference signal resource set includes at least one reference signal resource. The second reference signal resource set can be regarded as a set including multiple candidate reference signal resources known by the terminal device. The second reference signal resource set is a predefined or preconfigured reference signal resource set, and the following describes an example in which the second reference signal resource set is a preconfigured reference signal resource set. For example, the predefined reference signal resource set is a full set of available reference signal resources. For example, the preconfigured reference signal resource set is a set of candidate reference signal resources configured by configuration information received by the terminal device. As an example, the second reference signal resource set is a set of CSI-RS resources preconfigured by the network device for the terminal device. The following describes implementation manners in which the first indication information and the second reference signal resource set jointly indicate the information of the first reference signal resource set, i.e., the following implementation manners 1 to 5.

[0228] In the implementation 1, the first reference signal resource set is a subset of the second reference signal resource set. The first indication information includes at least one relative identification information, and the at least one relative identification information includes first relative identification information. The first relative identification information is relative identification information corresponding to a first reference signal resource in the first reference signal resource set. A first relative identification corresponding to the first relative identification information is a relative identification of the first reference signal resource in the second reference signal resource set. The first indication information includes at least one deletion information, and the at least one deletion information includes first deletion information. The first deletion information is used to indicate that a second reference signal resource belongs to the second reference signal resource set but does not belong to the first reference signal resource set. In this way, the bit overhead of indicating the first reference signal resource set can be saved. Any one of the at least one relative identification information corresponds to a relative identification of a reference signal resource in the second reference signal resource set. In other words, any one of the at least one relative identification information corresponds to a relative identification of a reference signal resource in the second reference signal resource set, and the reference signal resource is a reference signal resource in the first reference signal resource set. Any one of the at least one deletion information is used to indicate a reference signal resource that belongs to the second reference signal resource set but does not belong to the first reference signal resource set. The number of relative identification information in the at least one relative identification information is not limited. The number of deletion information in the at least one deletion information is not limited.

[0229] The first indication information can include only the at least one relative identification information, or only the at least one deletion information, or both the at least one relative identification information and the at least one deletion information. The first deletion information indicates identification information of the second reference signal resource. The identification information of the second reference signal resource includes second relative identification information. The second relative identification information is relative identification information corresponding to a second reference signal resource in the first reference signal resource set. A second relative identification corresponding to the second relative identification information is a relative identification of the second reference signal resource in the second reference signal resource set. If the first reference signal resource set is a subset of the second reference signal resource set, the technical essence of the first indication information is to indicate which reference signal resources in the second reference signal resource set are reference signal resources in the first reference signal resource set.

[0230] As an example, assume that the second set of reference signal resources includes M reference signal resources, the relative indices of the M reference signal resources in the second set of reference signal resources are index 0 ~ index (M-1) respectively, where different reference signal resources correspond to different indices, and the index corresponding to each reference signal resource is predefined or preconfigured; the first indication information only includes at least one relative index information, the at least one relative index information includes K relative index information, i.e. relative index information #1, relative index information #2, …, relative index information #K, the relative index corresponding to the relative index information #1 is index h#1, the relative index corresponding to the relative index information #2 is index h#2, …, the relative index corresponding to the relative index information #K is index h#K, then the first set of reference signal resources indicated by the first indication information includes the reference signal resources in the second set of reference signal resources whose relative indices are index h#1 ~ index h#K respectively, and the values of h#1, h#2, …, h#K are in the range of 0 ~ (M-1).

[0231] As another example, the first indication information includes a bitmap, the bitmap includes P bits, the P bits one-to-one correspond to P reference signal resources in the second set of reference signal resources, when the value of any bit in the bitmap is the first value, it indicates that the reference signal resource corresponding to the bit in the second set of reference signal resources belongs to the first set of reference signal resources, when the value of any bit in the bitmap is the second value, it indicates that the reference signal resource corresponding to the bit in the second set of reference signal resources does not belong to the first set of reference signal resources; P is an integer greater than K; each bit in the bitmap whose value is the first value is the relative index information corresponding to each reference signal resource in the first set of reference signal resources, or said another way, each bit in the bitmap whose value is the first value is the above-mentioned at least one relative index information. The first value is 1, and the second value is 0. Alternatively, the first value is 0, and the second value is 1.

[0232] As another example, the first indication information only includes the at least one deletion information, the at least one deletion information includes Q deletion information, i.e., deletion information #1, deletion information #2, …, deletion information #Q, it is assumed that the deletion information #1 is used to represent that the reference signal resource #1 belongs to the second reference signal resource set but does not belong to the first reference signal resource set, the deletion information #2 is used to represent that the reference signal resource #2 belongs to the second reference signal resource set but does not belong to the first reference signal resource set, and the deletion information #Q is used to represent that the reference signal resource #Q belongs to the second reference signal resource set but does not belong to the first reference signal resource set, then the first reference signal resource set indicated by the first indication information includes all reference signal resources in the second reference signal resource set except the reference signal resource #1, the reference signal resource #2, …, and the reference signal resource #Q. Q is a positive integer. Optionally, any one of the at least one deletion information includes a relative identifier of one reference signal resource in the second reference signal resource set in the second reference signal resource set.

[0233] As another example, the first indication information includes a bitmap, the bitmap includes P bits, the P bits correspond to P reference signal resources in the second reference signal resource set in a one-to-one manner, when a value of any one bit in the bitmap is a first value, it represents that the reference signal resource corresponding to the bit in the second reference signal resource set does not belong to the first reference signal resource set, when a value of any one bit in the bitmap is a second value, it represents that the reference signal resource corresponding to the bit in the second reference signal resource set belongs to the first reference signal resource set; P is an integer greater than K; each bit with the second value in the bitmap is a relative identifier corresponding to each reference signal resource in the first reference signal resource set, or said another way, each bit with the second value in the bitmap is the above-mentioned at least one relative identifier. The first value is 1, and the second value is 0. Alternatively, the first value is 0, and the second value is 1.

[0234] In a second implementation, the second set of reference signal resources is a subset of the first set of reference signal resources, and the first indication information includes at least one augmentation information. The at least one augmentation information includes first augmentation information, and the first augmentation information is used to indicate that a third reference signal resource belongs to the first set of reference signal resources but does not belong to the second set of reference signal resources. Any one of the at least one augmentation information is used to indicate one reference signal resource that belongs to the first set of reference signal resources but does not belong to the second set of reference signal resources. The number of the augmentation information in the at least one augmentation information is not limited. Optionally, the first augmentation information indicates identification information of the third reference signal resource. Each of the at least one augmentation information can indicate identification information of one reference signal resource, i.e., identification information of the reference signal resource indicated by the augmentation information. The first set of reference signal resources includes all reference signal resources in the second set of reference signal resources and reference signal resources that belong to the first set of reference signal resources but do not belong to the second set of reference signal resources and are indicated by each of the at least one augmentation information.

[0235] As an example, the first indication information includes at least one augmentation information, and the at least one augmentation information includes Q1 augmentation information, i.e., augmentation information #1, augmentation information #2, …, and augmentation information #Q1. It is assumed that the augmentation information #1 is used to indicate that the reference signal resource #1 belongs to the first set of reference signal resources but does not belong to the second set of reference signal resources, the augmentation information #2 is used to indicate that the reference signal resource #2 belongs to the first set of reference signal resources but does not belong to the second set of reference signal resources, and the augmentation information #Q1 is used to indicate that the reference signal resource #Q1 belongs to the first set of reference signal resources but does not belong to the second set of reference signal resources. Then, the first set of reference signal resources indicated by the first indication information includes all reference signal resources in the second set of reference signal resources and the reference signal resource #1, the reference signal resource #2, …, and the reference signal resource #Q1. Q1 is a positive integer.

[0236] As another example, the first indication information includes a bitmap including P1 bits, the P1 bits one-to-one corresponding to P1 reference signal resources in a fourth reference signal resource set, the fourth reference signal resource set being a predefined or preconfigured reference signal resource set, an intersection of the fourth reference signal resource set and the second reference signal resource set being an empty set, i.e., each reference signal resource in the fourth reference signal resource set does not belong to the second reference signal resource set; a value of any bit in the bitmap being the first value indicates that the reference signal resource corresponding to the bit in the fourth reference signal resource set belongs to the first reference signal resource set but does not belong to the second reference signal resource set, a value of any bit in the bitmap being the second value indicates that the reference signal resource corresponding to the bit in the fourth reference signal resource set does not belong to the first reference signal resource set; P1 being a positive integer; the first reference signal resource set indicated by the first indication information including all reference signal resources in the second reference signal resource set and the reference signal resources corresponding to the bits with the first value in the bitmap in the fourth reference signal resource set. The bits with the first value in the bitmap are the at least one augmented information. The first value is 1 and the second value is 0. Or, the first value is 0 and the second value is 1.

[0237] In implementation 3, the first indication information includes at least one relative identification information and at least one augmented information, the at least one relative identification information includes first relative identification information, the first relative identification information being relative identification information corresponding to a first reference signal resource in the first reference signal resource set, a first relative identification corresponding to the first relative identification information being a relative identification of the first reference signal resource in the second reference signal resource set, i.e., the first relative identification corresponding to the first reference signal resource in the second reference signal resource set, the at least one augmented information including first augmented information, the first augmented information being used to indicate that a third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set. Any augmented information included in the at least one augmented information is used to indicate a reference signal resource belonging to the first reference signal resource set but not belonging to the second reference signal resource set. The first reference signal resource set includes the reference signal resources respectively corresponding to the relative identifications in the second reference signal resource set respectively corresponding to the relative identifications in the at least one relative identification information, and the reference signal resources belonging to the first reference signal resource set but not belonging to the second reference signal resource set indicated by each augmented information in the at least one augmented information.

[0238] As an example, it is assumed that the second reference signal resource set includes M reference signal resources, the relative identifiers of the M reference signal resources in the second reference signal resource set are index 0~index (M-1) respectively, wherein different reference signal resources correspond to different indexes, and the index corresponding to each reference signal resource is predefined or preconfigured; the first indication information includes at least one relative identifier information and at least one augmented information, the at least one relative identifier information includes K relative identifier information, i.e. relative identifier information #1, relative identifier information #2, …, relative identifier information #K, the relative identifier corresponding to the relative identifier information #1 is index h#1, the relative identifier corresponding to the relative identifier information #2 is index h#2, …, the relative identifier corresponding to the relative identifier information #K is index h#K; the at least one augmented information includes Q1 augmented information, i.e. augmented information #1, augmented information #2, …, augmented information #Q1, the augmented information #1 is used to represent that the reference signal resource #1 belongs to the first reference signal resource set but does not belong to the second reference signal resource set, the augmented information #2 is used to represent that the reference signal resource #2 belongs to the first reference signal resource set but does not belong to the second reference signal resource set, and the augmented information #Q1 is used to represent that the reference signal resource #Q1 belongs to the first reference signal resource set but does not belong to the second reference signal resource set; the first reference signal resource set indicated by the first indication information includes the reference signal resources with the relative identifiers of index h#1~index h#K in the second reference signal resource set and the reference signal resource #1, the reference signal resource #2, …, the reference signal resource #Q1, and the values of h#1, h#2, …, h#K are in the range of 0~(M-1). Q1 is a positive integer.

[0239] In implementation 4, the first indication information includes at least one deleted information and at least one augmented information, the at least one deleted information includes first deleted information, the first deleted information is used to represent that the second reference signal resource belongs to the second reference signal resource set but does not belong to the first reference signal resource set, and the at least one augmented information includes first augmented information, the first augmented information is used to represent that the third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set. Any one of the at least one deleted information is used to represent one reference signal resource belonging to the second reference signal resource set but not belonging to the first reference signal resource set. The first reference signal resource set includes all reference signal resources in the second reference signal resource set except the reference signal resources represented by the deleted information in the at least one deleted information, and the reference signal resource belonging to the first reference signal resource set but not belonging to the second reference signal resource set represented by each augmented information in the at least one augmented information.

[0240] As an example, the first indication information includes at least one deletion information and at least one addition information; the at least one deletion information includes Q deletion information, i.e., deletion information #1, deletion information #2, …, and deletion information #Q, the deletion information #1 is used to represent that the reference signal resource #1 belongs to the second reference signal resource set but not to the first reference signal resource set, the deletion information #2 is used to represent that the reference signal resource #2 belongs to the second reference signal resource set but not to the first reference signal resource set, and the deletion information #Q is used to represent that the reference signal resource #Q belongs to the second reference signal resource set but not to the first reference signal resource set; the at least one addition information includes Q1 addition information, i.e., addition information #1, addition information #2, …, and addition information #Q1, the addition information #1 is used to represent that the reference signal resource #1 belongs to the first reference signal resource set but not to the second reference signal resource set, the addition information #2 is used to represent that the reference signal resource #2 belongs to the first reference signal resource set but not to the second reference signal resource set, and the addition information #Q1 is used to represent that the reference signal resource #Q1 belongs to the first reference signal resource set but not to the second reference signal resource set; the first reference signal resource set indicated by the first indication information includes all reference signal resources in the second reference signal resource set except the reference signal resource #1, the reference signal resource #2, …, and the reference signal resource #Q, and the reference signal resource #1, the reference signal resource #2, …, and the reference signal resource #Q1. Q is a positive integer, and Q1 is a positive integer.

[0241] In implementation 5, the first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, including: the first indication information includes at least one replacement information, the at least one replacement information includes first replacement information, the first replacement information is used to represent that a fourth reference signal resource in the second reference signal resource set is replaced by a fifth reference signal resource, and the first reference signal resource set is obtained after one or more reference signal resources in the second reference signal resource set are replaced, the one or more reference signal resources include the fourth reference signal resource. The number of replacement information in the at least one replacement information is not limited. The fifth reference signal resource belongs to a fourth reference signal resource set. The intersection of the fourth reference signal resource set and the second reference signal resource set is an empty set. The fourth reference signal resource set is predefined or preconfigured. Any one of the at least one replacement information is used to represent that one reference signal resource in the second reference signal resource set is replaced by one reference signal resource in the fourth reference signal resource set. Any one of the at least one replacement information includes identification information of one reference signal resource in the second reference signal resource set and identification information of the reference signal resource replaced for the reference signal resource, i.e., identification information of one reference signal resource in the fourth reference signal resource set.

[0242] As an example, the first indication information includes at least one replacement information, the at least one replacement information includes K1 pieces of replacement information, i.e., replacement information #1, replacement information #2, …, replacement information #K1, assuming that the replacement information #1 is used to represent that the reference signal resource #m1 in the second reference signal resource set is replaced by the reference signal resource #n1, the replacement information #2 is used to represent that the reference signal resource #m2 in the second reference signal resource set is replaced by the reference signal resource #n2, …, the replacement information #K1 is used to represent that the reference signal resource #m(K1) in the second reference signal resource set is replaced by the reference signal resource #n(K1), then the first reference signal resource set indicated by the first indication information is a reference signal resource set after one or more reference signal resources in the fourth reference signal resource set are replaced, the one or more reference signal resources include the reference signal resource #m1, the reference signal resource #m2, …, the reference signal resource #m(K1), and K1 is a positive integer.

[0243] Optionally, the first indication information is also used to indicate associated identification information of the second reference signal resource set, and the first reference signal resource set corresponds to the associated identification information; thereby the terminal device can determine the second reference signal resource set associated with the first reference signal resource set according to the first indication information. The associated identification information can include one or more of the following: identification information of the second reference signal resource set, resource configuration identification information of a resource configuration corresponding to the second reference signal resource set, and CSI task identification information of a CSI task corresponding to the second reference signal resource set. The CSI task refers to a CSI report (CSI report) and / or a CSI trigger state (trigger state). In some possible designs, the network device pre-configures a plurality of reference signal resource sets for the terminal device, the plurality of reference signal resource sets include the second reference signal resource set, and each reference signal resource set in the plurality of reference signal resource sets has a similar function to that of the second reference signal resource set. The network device can select any one of the plurality of reference signal resource sets to assist in indicating the first reference signal resource set according to actual needs.

[0244] In a possible implementation, the first indication information includes at least one quasi co-location information, and the at least one quasi co-location information includes first quasi co-location information corresponding to a sixth reference signal resource in the first set of reference signal resources. The first quasi co-location information is used to indicate information of a seventh reference signal resource that is quasi co-located with the sixth reference signal resource, and the first quasi co-location information includes third relative identification information, which indicates a relative identity of the seventh reference signal resource in a third set of reference signal resources. The third set of reference signal resources is a preconfigured set of reference signal resources. For example, a set of candidate reference signal resources configured by the received configuration information. As an example, any one of the at least one quasi co-location information one-to-one corresponds to quasi co-location information corresponding to each reference signal resource in the first set of reference signal resources. As another example, any one of the at least one quasi co-location information indicates quasi co-location information corresponding to a group of reference signal resources in the first set of reference signal resources; and the group of reference signal resources includes at least one reference signal resource or at least two reference signal resources.

[0245] In a possible implementation, the first quasi co-location information corresponds to a second validity time, and the second validity time corresponds to a first CSI report corresponding to the first measurement result, or in other words, the first CSI report is within the second validity time. The first quasi co-location information corresponding to the second validity time means that after the second validity time, the first quasi co-location information corresponding to the sixth reference signal resource is invalid. It should be understood that after the second validity time, the quasi co-location information corresponding to each reference signal resource in the first set of reference signal resources is invalid. The first quasi co-location information being invalid includes that the sixth reference signal resource returns to quasi co-location information corresponding to before the first quasi co-location information is valid, or the sixth reference signal resource does not correspond to any quasi co-location information. The first CSI report being within the second validity time includes that a time unit in which control information used to trigger or configure the first CSI report is within the second validity time, or a time unit in which CSI reporting information corresponding to the first CSI report is within the second validity time, or a time domain resource corresponding to the first set of reference signal resources is within the second validity time.

[0246] In a possible implementation, the first quasi co-location information is applicable to the sixth reference signal resource; the sixth reference signal resource is the earliest reference signal resource corresponding to the first reference signal resource identifier after the first quasi co-location information takes effect, where the first reference signal resource identifier is a reference signal resource identifier corresponding to the sixth reference signal resource, and the earliest reference signal resource corresponding to the first reference signal resource identifier can be the earliest aperiodic reference signal resource corresponding to the first reference signal resource identifier, or the earliest periodic reference signal resource corresponding to the first reference signal resource identifier, or the earliest semi-persistent reference signal resource corresponding to the first reference signal resource identifier; or,

[0247] The first reference signal resource set is the earliest reference signal resource set corresponding to the first reference signal resource configuration identifier after the first quasi co-location information takes effect, where the first reference signal resource configuration identifier is a reference signal resource configuration identifier corresponding to the first reference signal resource set; or,

[0248] The sixth reference signal resource is a reference signal resource corresponding to the first CSI report, the first CSI report is the earliest CSI report after the first quasi co-location information takes effect or the earliest CSI report corresponding to the first CSI report identifier, where the first CSI report identifier is a CSI report identifier corresponding to the first CSI report. The earliest CSI report is the earliest aperiodic CSI report, or the earliest periodic CSI report, or the earliest semi-persistent CSI report.

[0249] The first quasi co-location information is not applicable to other reference signal resources corresponding to the first reference signal resource identifier after the sixth reference signal resource, or the first quasi co-location information is not applicable to other reference signal resource sets corresponding to the first reference signal resource configuration identifier after the first reference signal resource set, or the first quasi co-location information is not applicable to other CSI reports after the first CSI report or other CSI reports corresponding to the first CSI report identifier. Corresponding to the first CSI report, the terminal device performs measurement on the sixth reference signal resource to determine the first measurement result. The first quasi co-location information taking effect time, that is, the time when the first quasi co-location information starts to take effect, is: a time unit when the terminal device receives the first indication information, or a time unit corresponding to a time unit when the terminal device receives the first indication information plus a time offset value, or a time unit of the sixth reference signal resource on which the first quasi co-location information acts.

[0250] FIG. 6 is a flow diagram of another communication method provided by an embodiment of the present application. FIG. 6 shows an AI-based beam management scheme. The method flow in FIG. 6 is a possible implementation of the method described in FIG. 5. As shown in FIG. 6, the method includes:

[0251] 601. The network device sends second configuration information to the terminal device.

[0252] Correspondingly, the terminal device receives the second configuration information from the network device. The second configuration information is used to configure a second reference signal resource set. The second reference signal resource set is a set of candidate reference signal resources, and the second reference signal resource set includes at least one reference signal resource. Step 601 is optional. The second configuration information corresponds to or can be carried in high-layer signaling, such as an RRC message. The second reference signal resource set can be updated or configured periodically, for example, once every week or two weeks, instead of performing step 601 every time the method flow of FIG. 6 is performed. The second reference signal resource set can be obtained by the network device based on historical experience, and the size of the second reference signal resource set is determined by the network side and will not be too large, for example, including 8 or 16 reference signal resources. The specific manner in which the network device obtains the second reference signal resource set is not limited. The reference signal resources in the second reference signal resource set can be reference signal resources that are determined by the network device to have a greater probability of corresponding to the best candidate beam between the terminal device and the network device. That is, the reference signal resources in the second reference signal resource set are more likely to be the best candidate beam between the network device and the terminal device than other reference signal resources.

[0253] 602. The network device scans SSBs.

[0254] Correspondingly, the terminal device receives each SSB sent by the network device. In one possible implementation manner, the network device configures SSB beam scanning resources, that is, reference signal resources corresponding to each SSB; and then, the network device sends the SSB on the reference signal resource corresponding to the SSB. An example of scanning SSBs by the network device is as follows: The network device sends SSB#1, SSB#2, SSB#3, …, SSB#V in sequence, V is an integer greater than 1, any two of SSB#1, SSB#2, SSB#3, …, SSB#V correspond to different wide beams, and any two of SSB#1, SSB#2, SSB#3, …, SSB#V correspond to different reference signal resources.

[0255] 603. The terminal device measures the RSRP of each SSB sent by the network device.

[0256] 604. The terminal device sends the measurement result of each SSB to the network device.

[0257] Correspondingly, the network device receives the measurement result of each SSB from the terminal device.

[0258] 605. The network device takes the received RSRP of each SSB as input of an AI model to obtain a beam prediction result.

[0259] The beam prediction result includes the K candidate beams, i.e., the top-K candidate beams. The AI model can output the top-K candidate beams at the current time, or the top-K candidate beams at a certain time or certain times in the future. The AI model can be located at the network device (i.e., the network side) or at the terminal device. In the method flow of FIG. 6, the AI model is located at the network device as an example. When the AI model is located at the terminal device, the terminal device takes the RSRP of each SSB as input of the AI model, obtains the beam prediction result, and feeds back to the network device, and the network device infers the K candidate beams according to the beam prediction result. It should be understood that when the AI model is located at the terminal device, step 605 can be replaced by: the terminal device takes the RSRP of each SSB as input of the AI model, obtains the beam prediction result, and feeds back to the network device; and the network device infers the K candidate beams according to the beam prediction result.

[0260] 606. The network device generates first indication information according to the K reference signals to be sent.

[0261] The K reference signals correspond to the K candidate beams one by one. Each reference signal is sent on the corresponding candidate beam. Step 606 can refer to step 501 in FIG. 5. Optionally, the first indication information and the second reference signal resource set jointly indicate information of the first reference signal resource set. The implementation of the first indication information and the second reference signal resource set jointly indicating the information of the first reference signal resource set can refer to the implementation modes 1 to 5.

[0262] 607. The network device sends the first indication information to the terminal device.

[0263] Correspondingly, the terminal device receives the first indication information from the network device. Step 606 can refer to step 502 in FIG. 5.

[0264] 608. The network device performs beam sweeping according to the reference signal resources corresponding to the K candidate beams, and correspondingly, the terminal device performs measurement based on at least one reference signal resource in the first reference signal resource set to determine a first measurement result.

[0265] Step 608 can refer to step 503 in FIG. 5.

[0266] 609. The terminal device sends the first measurement result to the network device.

[0267] Correspondingly, the network device receives the first measurement result from the terminal device.

[0268] 610. The network device determines an optimal beam according to the first measurement result.

[0269] As an example, the first measurement result includes an RSRP corresponding to each candidate beam of the K candidate beams; the network device determines the candidate beam with the maximum corresponding RSRP as the optimal beam. The RSRP corresponding to each candidate beam refers to the RSRP corresponding to the reference signal corresponding to the candidate beam. Step 610 is optional.

[0270] In the embodiment of the application, the network device sends first indication information to the terminal device, and the terminal device determines the receive beam corresponding to each candidate beam in the Top-K candidate beams to be scanned by the network device according to the first indication information, so that the terminal device can dynamically perform CSI-RS beam measurement, which can not only adjust the optimal beam in time, but also effectively reduce the scanning overhead.

[0271] FIG. 7 is a flowchart of another communication method provided by an embodiment of the application. FIG. 7 shows an AI-based beam management scheme. The method flow in FIG. 7 is a possible implementation of the method described in FIG. 5. As shown in FIG. 7, the method includes:

[0272] 701. The network device fixes the CSI-RS resource index.

[0273] A possible implementation of the network device fixing the CSI-RS resource index is as follows: mapping the K candidate beams to a group of fixed logical beams / ports to fix the CSI-RS resource index, for example, fixing the CSI-RS resource index corresponding to all K candidate beams as the first index of the CSI-RS resource set.

[0274] 702. The network device scans the SSB.

[0275] Correspondingly, the terminal device receives each SSB sent by the network device. Steps 702 to 707 can refer to steps 602 to 607 in FIG. 6, and the steps are described in detail here.

[0276] 703. The terminal device measures the RSRP of each SSB sent by the network device.

[0277] 704. The terminal device sends the measurement result of each SSB to the network device.

[0278] Correspondingly, the network device receives the measurement result of each SSB from the terminal device.

[0279] 705. The network device takes the received RSRP of each SSB as the input of the AI model to obtain a beam prediction result.

[0280] The beam prediction result includes the above-mentioned K candidate beams, that is, the best K candidate beams (Top-K candidate beams).

[0281] 706. The network device generates first indication information according to the K reference signals to be transmitted.

[0282] The K reference signals correspond to the K candidate beams one by one. Each reference signal is transmitted on its corresponding candidate beam. Step 706 can refer to step 501 in FIG. 5. The first indication information includes at least one quasi-co-location information, and the at least one quasi-co-location information includes first quasi-co-location information corresponding to a sixth reference signal resource in a first reference signal resource set.

[0283] 707. The network device transmits the first indication information to the terminal device.

[0284] Correspondingly, the terminal device receives the first indication information from the network device. Step 706 can refer to step 502 in FIG. 5.

[0285] 708. The network device adjusts the mapping of the logical beam index to the physical beam index according to the index of the K candidate beams.

[0286] In the embodiments of the present application, the network device maps the K candidate beams determined in different beam management tasks to a fixed set of logical beams / ports; then, maps the different K candidate beams to different physical beams, realizing the dynamic change of the physical beam when the logical beam index is fixed. For example, the network device determines a first group of candidate beams when performing a certain beam management task, and the network device fixes the CSI-RS resource indexes corresponding to the first group of candidate beams to the first index of the CSI-RS resource set. According to the first index corresponding to the first group of candidate beams, the first group of candidate beams is mapped to the physical beam with the third index. The network device determines a second group of candidate beams when performing another beam management task, and the network device fixes the CSI-RS resource indexes corresponding to the second group of candidate beams to the first index of the CSI-RS resource set. According to the first index corresponding to the second group of candidate beams, the second group of candidate beams is mapped to the physical beam with the fourth index, and the third index and the fourth index are different.

[0287] 709. The network device performs beam sweeping according to the reference signal resources corresponding to the K candidate beams, and correspondingly, the terminal device performs measurement based on at least one reference signal resource in the first reference signal resource set to determine a first measurement result.

[0288] Step 709 can refer to step 503 in FIG. 5.

[0289] 710. The terminal device transmits the first measurement result to the network device.

[0290] Correspondingly, the network device receives the first measurement result from the terminal device.

[0291] 711、The network device determines the optimal beam according to the first measurement result.

[0292] As an example, the first measurement result includes an RSRP corresponding to each candidate beam in the K candidate beams; the network device determines the candidate beam with the maximum corresponding RSRP as the optimal beam. The RSRP corresponding to each candidate beam refers to the RSRP corresponding to the reference signal corresponding to the candidate beam.

[0293] In the embodiments of the present application, the network device sends first indication information to the terminal device, the first indication information indicating the QCL relationship between the candidate beam and other beams, and the terminal device determines the receiving beam corresponding to each candidate beam in the Top-K candidate beams to be scanned by the network device according to the first indication information, so that the terminal device can dynamically perform CSI-RS beam measurement, both timely adjusting the optimal beam and effectively reducing the scanning overhead.

[0294] In the above embodiments, the AI model of the network device can be deployed on the network device (such as a base station), at this time the AI model is implemented for the chip inside the network device; or can be deployed on the network side AI model deployment device collectively referred to as intelligent network element such as near real-time RIC (near real-time RIC is arranged in RAN node, for example, CU / DU).

[0295] Taking the embodiment described in FIG. 6 as an example, the main process of deploying the AI model to the near real-time RIC is shown in FIG. 8. FIG. 8 is a flowchart of another communication method provided by the embodiments of the present application. The difference between the method flow of FIG. 8 and the method flow of FIG. 6 is that the AI model is deployed to the near real-time RIC, i.e., the intelligent network element. As shown in FIG. 8, the method includes:

[0296] 801、The network device sends second configuration information to the terminal device.

[0297] Correspondingly, the terminal device receives the second configuration information from the network device. Steps 801 to 804 can refer to steps 601 to 604 in FIG. 6, which will not be described here.

[0298] 802、The network device scans the SSB.

[0299] Correspondingly, the terminal device receives each SSB sent by the network device.

[0300] 803、The terminal device measures the RSRP of each SSB sent by the network device.

[0301] 804、The terminal device sends the measurement result of each SSB to the network device.

[0302] Correspondingly, the network device receives the measurement results of the SSBs from the terminal device.

[0303] 805. The network device sends inference task information to the intelligent network element.

[0304] Correspondingly, the intelligent network element receives the inference task information from the network device. The inference task information is used by the intelligent network element to predict the best candidate beams according to the RSRP of each SSB. The inference task information includes the measurement results of each SSB.

[0305] 806. The intelligent network element takes the RSRP of each SSB as the input of the AI model to obtain beam prediction results.

[0306] The beam prediction results include the above-mentioned K candidate beams, i.e., the top-K candidate beams.

[0307] 807. The intelligent network element sends the beam prediction results to the network device.

[0308] Correspondingly, the network device receives the beam prediction results from the intelligent network element.

[0309] 808. The network device generates first indication information according to the K reference signals to be sent.

[0310] The K reference signals correspond one-to-one to the above-mentioned K candidate beams. Steps 808 to 812 can refer to steps 606 to 610 in FIG. 6, which will not be described here.

[0311] 809. The network device sends the first indication information to the terminal device.

[0312] Correspondingly, the terminal device receives the first indication information from the network device.

[0313] 810. The network device performs beam scanning according to the reference signal resources corresponding to the K candidate beams, and correspondingly, the terminal device measures based on at least one reference signal resource in the first reference signal resource set to determine a first measurement result.

[0314] 811. The terminal device sends the first measurement result to the network device.

[0315] Correspondingly, the network device receives the first measurement result from the terminal device.

[0316] 812. The network device determines the optimal beam according to the first measurement result.

[0317] In the embodiments of the present application, the network device sends first indication information to the terminal device, and the terminal device determines, according to the first indication information, a receiving beam corresponding to each candidate beam in the Top-K candidate beams to be scanned by the network device, so that the terminal device can dynamically perform CSI-RS beam measurement, and both timely adjustment of the optimal beam and effective reduction of scanning overhead can be achieved.

[0318] The structure of a communication device capable of implementing the communication method provided in the embodiments of the present application will be described below with reference to the accompanying drawings. The communication device is briefly described below, and for details of the implementation scheme, reference can be made to the description of the method embodiments provided above, which will not be repeated here.

[0319] FIG. 9 is a structural schematic diagram of a communication device 900 provided in the embodiments of the present application. The communication device 900 can correspond to the functions or steps implemented by the terminal device in the above-mentioned various method embodiments, or can correspond to the functions or steps implemented by the network device in the above-mentioned various method embodiments. The communication device can include a processing module 910 and a transceiver module 920. In a possible implementation manner, a storage unit can also be included, which can be used to store instructions (codes or programs) and / or data. The processing module 910 and the transceiver module 920 can be coupled with the storage unit, for example, the processing module 910 can read the instructions (codes or programs) and / or data in the storage unit to implement the corresponding method. The above-mentioned various units can be independently arranged, or partially or entirely integrated. For example, the transceiver module 920 can include a sending module and a receiving module. The sending module can be a transmitter, and the receiving module can be a receiver. The entity corresponding to the transceiver module 920 can be a transceiver, or a communication interface.

[0320] In some possible implementation manners, the communication device 900 can correspond to the behaviors and functions of the terminal device in the above-mentioned method embodiments. For example, the communication device 900 can be the terminal device, or can be a component (for example, a chip or a circuit) applied to the terminal device. The transceiver module 920 can be used, for example, to perform all the receiving or sending operations performed by the terminal device in the embodiments of FIGS. 5 to 8. The processing module 910 is configured to perform all the operations performed by the terminal device in the embodiments of FIGS. 5 to 8, except for the transceiving operations.

[0321] In some possible implementation manners, the communication device 900 can correspond to the behaviors and functions of the network device in the above-mentioned method embodiments. For example, the communication device 900 can be the network device, or can be a component (for example, a chip or a circuit) applied to the network device. The transceiver module 920 can be used, for example, to perform all the receiving or sending operations performed by the network device in the embodiments of FIGS. 5 to 8. The processing module 910 is configured to perform all the operations performed by the network device in the embodiments of FIGS. 5 to 8, except for the transceiving operations.

[0322] Figure 10 is a structural schematic diagram of another communication apparatus 100 provided by embodiments of the present application. The communication apparatus in Figure 10 can be the terminal device or the network device described above. As shown in Figure 10, the communication apparatus 100 includes at least one processor 1010 and at least one transceiver 1020.

[0323] In some embodiments of the present application, the processor 1010 and the transceiver 1020 can be configured to perform functions or operations performed by the terminal device. The transceiver 1020 is configured to perform all receiving or transmitting operations performed by the terminal device in the embodiments of Figures 5 to 8, for example. The processor 1010 is configured to perform all operations performed by the terminal device in the embodiments of Figures 5 to 8, except for the transceiving operations, for example.

[0324] In some embodiments of the present application, the processor 1010 and the transceiver 1020 can be configured to perform functions or operations performed by the network device. The transceiver 1020 is configured to perform all receiving or transmitting operations performed by the network device in the embodiments of Figures 5 to 8, for example. The processor 1010 is configured to perform all operations performed by the network device in the embodiments of Figures 5 to 8, except for the transceiving operations, for example.

[0325] The transceiver 1020 is configured to communicate with other devices / apparatuses via a transmission medium. The processor 1010 is configured to receive and / or transmit data and / or signaling by means of the transceiver 1020, and is configured to implement the methods in the method embodiments described above. The processor 1010 can implement the functions of the processing module 910, and the transceiver 1020 can implement the functions of the transceiving module 920. Optionally, the transceiver 1020 can include a radio frequency circuit and an antenna, where the radio frequency circuit is mainly configured to convert a baseband signal to a radio frequency signal and process the radio frequency signal. The antenna is mainly configured to transceive radio frequency signals in the form of electromagnetic waves. Input / output devices, such as touch screens, display screens, keyboards, etc., are mainly configured to receive data input by a user and output data to the user.

[0326] Optionally, the communication apparatus 100 can further include at least one memory 1030 configured to store program instructions and / or data. The memory 1030 is coupled to the processor 1010. The coupling in the embodiments of the present application is indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 1010 can operate in cooperation with the memory 1030. The processor 1010 can execute program instructions stored in the memory 1030. At least one of the at least one memory can be included in the processor.

[0327] The processor 1010 can read a software program in the memory 1030, interpret and execute instructions of the software program, and process data of the software program. When data needs to be transmitted wirelessly, the processor 1010 outputs a baseband signal to the radio frequency circuit after baseband processing of the data to be transmitted, and the radio frequency circuit converts the baseband signal into a radio frequency signal and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1010, and the processor 1010 converts the baseband signal into data and processes the data.

[0328] In another implementation, the radio frequency circuit and the antenna described above can be arranged independently of the processor that performs baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0329] The specific connection medium between the transceiver 1020, the processor 1010 and the memory 1030 in the embodiments of the present application is not limited. In FIG. 10, the memory 1030, the processor 1010 and the transceiver 1020 are connected through a bus 1040, which is represented by a thick line in FIG. 10, and the connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used in FIG. 10, but it does not mean that there is only one bus or only one type of bus.

[0330] In the embodiments of the present application, the processor can be one of the following devices: a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or all or part of the circuits of the foregoing devices for processing functions, which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0331] FIG. 11 is a schematic diagram of a chip system architecture provided by an embodiment of the present application. The chip system architecture can be used in a network device and / or a terminal device. A communication control module is configured to establish a communication connection. An input / output control module is configured to manage input and output signals of the device, for example, the input / output control module can be in the form of a modem, a keyboard, a mouse, a touch screen, etc. The input / output control module can also be part of the processor. A receiver / transmitter is configured to communicate with other devices. The receiver / transmitter can include a modem configured to modulate information or demodulate modulated information. An antenna is configured to transmit or receive signals. A storage module can include a random access memory (RAM) or a read-only memory (ROM). The storage module can be configured to store codes executable by the processor to implement corresponding functions. The processor can include an intelligent hardware device, such as a general-purpose processor, a digital signal processor (DSP), a central processing unit (CPU), a field-programmable gate array (FPGA), a graphics processing unit (GPU), a neural-network processing unit, etc.

[0332] In some possible embodiments, the terminal device establishes a communication connection with the network device through the communication control module. The terminal device receives signaling (e.g., the DCI or the MAC CE described above) and reference signals sent by the network device through the antenna and the receiver. The terminal device parses the signaling carrying the first indication information through the processor for subsequent processing of the CSI report. The terminal device sends the CSI report to the network device through the transmitter and the antenna. The terminal device stores the measurement results in the storage through the processor.

[0333] The present application also provides a computer-readable storage medium having stored therein a computer program or instructions, which, when executed on a computer, cause the computer to perform the method of the above-described embodiments.

[0334] The present application also provides a computer program product including instructions or a computer program, which, when executed on a computer, cause the method of the above-described embodiments to be performed.

[0335] The present application also provides a communication system including the terminal device and the network device described above.

[0336] The application also provides a chip, comprising: a communication interface and a processor; the communication interface is used for signal transceiving of the chip; and the processor is used for executing computer program instructions, so that a communication device comprising the chip executes the method in the above embodiments.

[0337] In the above embodiments, the implementation can be achieved by software, hardware, firmware or any combination thereof, entirely or partially. When implemented by software, the implementation can be achieved in the form of a computer program product, entirely or partially. The computer program product comprises one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, the above-mentioned processes or functions of the embodiments of the application are executed, entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment or other programmable apparatus. The computer programs or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer programs or instructions can be transferred from one website, computer, server or data center to another by wired or wireless means. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available medium can be a magnetic medium, for example, a floppy disk, a hard disk, a magnetic tape; an optical medium, for example, a digital video disc; and a semiconductor medium, for example, a solid-state disk. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0338] In various embodiments of the application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

Claims

1. A communication method characterized by comprising: Comprising: receiving first indication information, the first indication information being used for indicating information of a first reference signal resource set, the first reference signal resource set comprising at least one reference signal resource, the first reference signal resource set being a subset of a second reference signal resource set, or the second reference signal resource set being a subset of the first reference signal resource set, or the first reference signal resource set being a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set being the second reference signal resource set; wherein the second reference signal resource set is a set of candidate reference signal resources, the second reference signal resource set comprising at least one reference signal resource; determining a first measurement result, the first measurement result being obtained based on measurement on at least one reference signal resource in the first reference signal resource set.

2. The method of claim 1, wherein, The first indication information is carried in a downlink control information DCI and / or a medium access control layer control element MAC CE.

3. The method according to claim 1 or 2, characterized in that, The first reference signal resource set is a subset of the second reference signal resource set, comprising: The first indication information comprises at least one relative identification information, the at least one relative identification information comprising first relative identification information, the first relative identification information being relative identification information corresponding to a first reference signal resource in the first reference signal resource set, the first relative identification corresponding to the first relative identification information being a relative identification of the first reference signal resource in the second reference signal resource set; and / or, The first indication information comprises at least one pruning information, the at least one pruning information comprising first pruning information, the first pruning information being used for representing that a second reference signal resource belongs to the second reference signal resource set but does not belong to the first reference signal resource set.

4. The method according to claim 1 or 2, characterized in that, The second reference signal resource set is a subset of the first reference signal resource set, comprising: The first indication information comprises at least one expansion information, the at least one expansion information comprising first expansion information, the first expansion information being used for representing that a third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set.

5. The method according to claim 1 or 2, characterized in that, The first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, comprising: The first indication information comprises at least one replacement information, the at least one replacement information comprising first replacement information, the first replacement information being used for representing that a fourth reference signal resource in the second reference signal resource set is replaced by a fifth reference signal resource, the first reference signal resource set being obtained after one or more reference signal resources in the second reference signal resource set are replaced, the one or more reference signal resources comprising the fourth reference signal resource.

6. The method according to any one of claims 1 to 5, characterized in that, The first indication information is also used for indicating associated identification information of the second reference signal resource set, the first reference signal resource set corresponding to the associated identification information.

7. The method according to any one of claims 1 to 6, characterized in that, The first reference signal resource set corresponds to a first validity time, and the first validity time corresponds to a first CSI report corresponding to the first measurement result.

8. The method of claim 1 or 2, wherein, The first indication information is used to indicate information of the first reference signal resource set, including: The first indication information includes at least one quasi co-location information, and the at least one quasi co-location information includes first quasi co-location information corresponding to a sixth reference signal resource in the first reference signal resource set.

9. The method of claim 8, wherein, The first quasi co-location information is used to indicate information of a seventh reference signal resource quasi co-located with the sixth reference signal resource, and the first quasi co-location information includes third relative identification information indicating a relative identification of the seventh reference signal resource in a third reference signal resource set.

10. The method according to claim 8 or 9, characterized in that, The first quasi co-location information corresponds to a second validity time, and the second validity time corresponds to a first CSI report corresponding to the first measurement result.

11. The method according to claim 8 or 9, characterized in that, The first quasi co-location information is applicable to the sixth reference signal resource. The sixth reference signal resource is the earliest reference signal resource corresponding to a first reference signal resource identifier after the first quasi co-location information takes effect, wherein the first reference signal resource identifier is a reference signal resource identifier corresponding to the sixth reference signal resource, or The first reference signal resource set is the earliest reference signal resource set corresponding to a first reference signal resource configuration identifier after the first quasi co-location information takes effect, wherein the first reference signal resource configuration identifier is a reference signal resource configuration identifier corresponding to the first reference signal resource set; or The sixth reference signal resource is a reference signal resource corresponding to a first CSI report, and the first CSI report is the earliest CSI report after the first quasi co-location information takes effect or the earliest CSI report corresponding to a first CSI report identifier, wherein the first CSI report identifier is a CSI report identifier corresponding to the first CSI report.

12. The method according to any one of claims 8 to 11, characterized in that, The reference signal resource used to determine the first measurement result does not include reference signal resources other than the reference signal resources of the first reference signal resource set; and the method further includes: receiving first configuration information, wherein the first configuration information sets a channel measurement time limit corresponding to a first CSI report corresponding to the first measurement result to be unconfigured.

13. The method according to any one of claims 8 to 12, characterized in that, The method further includes: performing measurement based on at least one reference signal resource to obtain a second measurement result, wherein the at least one reference signal resource does not include reference signal resources in the first reference signal resource set, and wherein a channel measurement time limit corresponding to a second CSI report corresponding to the second measurement result is disabled.

14. The method according to any one of claims 2 to 13, characterized in that, The first indication information is carried in DCI, and the first indication information reuses one or more fields in the DCI to indicate information of the first reference signal resource set, and the one or more fields include one or more of the following: a new data indication (NDI) field, a redundancy version (RV) field, a hybrid automatic repeat request (HARQ) field, or a CSI request field.

15. A method of communication, comprising: including: generating first indication information according to the K reference signals to be sent, the first indication information being used for indicating information of a first reference signal resource set, K reference signal resources in the first reference signal resource set corresponding to the K reference signals, the first reference signal resource set including at least one reference signal resource, the first reference signal resource set being a subset of a second reference signal resource set, or the second reference signal resource set being a subset of the first reference signal resource set, or the first reference signal resource set being a reference signal resource set replacing the second reference signal resource set, or the first reference signal resource set being the second reference signal resource set, the K being an integer greater than 1; wherein the second reference signal resource set is a set of candidate reference signal resources, and the second reference signal resource set includes at least one reference signal resource; sending the first indication information.

16. The method of claim 15, wherein, The first indication information is carried in downlink control information (DCI) and / or a medium access control (MAC) control element (CE).

17. The method according to claim 15 or 16, characterized in that, The first reference signal resource set is a subset of the second reference signal resource set, including: The first indication information includes at least one relative identification information, the at least one relative identification information including first relative identification information, the first relative identification information being relative identification information corresponding to a first reference signal resource in the first reference signal resource set, the first relative identification corresponding to the first relative identification information being a relative identification of the first reference signal resource in the second reference signal resource set; and / or The first indication information includes at least one deletion information, the at least one deletion information including first deletion information, the first deletion information being used for representing that a second reference signal resource belongs to the second reference signal resource set but does not belong to the first reference signal resource set.

18. The method of claim 15 or 16, wherein, The second reference signal resource set is a subset of the first reference signal resource set, including: The first indication information includes at least one expansion information, the at least one expansion information including first expansion information, the first expansion information being used for representing that a third reference signal resource belongs to the first reference signal resource set but does not belong to the second reference signal resource set.

19. The method of claim 15 or 16, wherein, The first reference signal resource set is a reference signal resource set replacing the second reference signal resource set, including: The first indication information includes at least one replacement information, the at least one replacement information including first replacement information, the first replacement information being used for representing that a fourth reference signal resource in the second reference signal resource set is replaced by a fifth reference signal resource, the first reference signal resource set being obtained after one or more reference signal resources in the second reference signal resource set are replaced, the one or more reference signal resources including the fourth reference signal resource.

20. The method according to any one of claims 15 to 19, characterized in that, The first indication information is also used for indicating associated identification information of the second reference signal resource set, the first reference signal resource set corresponding to the associated identification information.

21. The method according to any one of claims 15 to 20, characterized in that, The first reference signal resource set corresponds to a first validity time, and the first validity time corresponds to a first CSI report corresponding to the first measurement result.

22. The method of claim 15 or 16, wherein, The first indication information is used for indicating information of the first reference signal resource set, and includes: The first indication information includes at least one quasi-co-location information, and the at least one quasi-co-location information includes first quasi-co-location information corresponding to a sixth reference signal resource in the first reference signal resource set.

23. The method of claim 22, wherein, The first quasi-co-location information is used for indicating information of a seventh reference signal resource quasi-co-located with the sixth reference signal resource, and includes third relative identification information indicating a relative identification of the seventh reference signal resource in a third reference signal resource set.

24. The method of claim 22 or 23, wherein, The first quasi-co-location information corresponds to a second validity time, and the second validity time corresponds to a first CSI report corresponding to the first measurement result.

25. The method of claim 22 or 23, wherein, The first quasi-co-location information is applicable to the sixth reference signal resource. The sixth reference signal resource is the earliest reference signal resource corresponding to a first reference signal resource identifier after the first quasi-co-location information takes effect, where the first reference signal resource identifier is a reference signal resource identifier corresponding to the sixth reference signal resource, or The first reference signal resource set is the earliest reference signal resource set corresponding to a first reference signal resource configuration identifier after the first quasi-co-location information takes effect, where the first reference signal resource configuration identifier is a reference signal resource configuration identifier corresponding to the first reference signal resource set; or The sixth reference signal resource is a reference signal resource corresponding to a first CSI report, and the first CSI report is the earliest CSI report after the first quasi-co-location information takes effect or the earliest CSI report corresponding to a first CSI report identifier, where the first CSI report identifier is a CSI report identifier corresponding to the first CSI report.

26. The method according to any one of claims 16 to 25, characterized in that, The first indication information is carried in a DCI, and the first indication information reuses one or more fields in the DCI to indicate information of the first reference signal resource set, and the one or more fields include one or more of the following: a new data indicator (NDI) field, a redundancy version (RV) field, a hybrid automatic repeat request (HARQ) field, or a CSI request field.

27. A communications device, characterized by A module for performing the method of any one of claims 1-14.

28. A communications device, characterized by A module for performing the method of any one of claims 15-26.

29. A computer-readable storage medium, characterized in that, The computer program or instructions are stored on the computer readable storage medium, and when executed, cause a computer to perform the method of any one of claims 1-26.

30. A computer program product, characterised in that, The computer program product, when running on a computer, causes the computer to perform the method of any one of claims 1-26.

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