CN108696306B - CSI feedback configuration method, network side equipment and terminal - Google Patents

Abstract

The invention provides a CSI feedback configuration method, network side equipment and a terminal, wherein the method comprises the following steps: the method comprises the steps that network side equipment sends indication information to a terminal through a first signaling, wherein the indication information is used for indicating the terminal to obtain feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal; and the network side equipment receives the CSI fed back by the terminal according to the feedback configuration. Therefore, the terminal can perform CSI feedback according to the feedback configuration configured by the network side equipment, and the accuracy of CSI feedback can be improved.

Description

CSI feedback configuration method, network side equipment and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a Channel State Information (CSI) feedback configuration method, a network side device, and a terminal.

Background

In order to improve communication performance in a communication system, a terminal often feeds back CSI to a network side device, and the network side device may perform corresponding data transmission processing based on the CSI fed back by the terminal. However, at present, the CSI feedback method from the terminal to the network device is fixed, which results in poor accuracy of CSI feedback.

Disclosure of Invention

The invention aims to provide a CSI feedback configuration method, network side equipment and a terminal, so as to solve the problem of poor accuracy of CSI feedback.

In order to achieve the above object, an embodiment of the present invention provides a CSI feedback configuration method, including:

the method comprises the steps that network side equipment sends indication information to a terminal through a first signaling, wherein the indication information is used for indicating the terminal to obtain feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal;

and the network side equipment receives the CSI fed back by the terminal according to the feedback configuration.

Optionally, the indication Information is further used to indicate that the terminal acquires a resource configuration of a Channel State Information-Reference Signals (CSI-RS) corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is configured to indicate that the terminal needs to feed back at least one of a Rank Indication (RI), a Precoding Matrix Indicator (PMI), a Channel Quality Indication (CQI), and Channel Reservation Information (CRI).

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, the method further includes:

the network side equipment configures L link configurations to the terminal through a second signaling, wherein L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, the method further includes:

the network side equipment configures resource configuration and feedback configuration of M CSI-RSs to the terminal through a third signaling, wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, the method further includes:

and the network side equipment sends the CSI-RS according to the CSI-RS resource configuration, wherein the CSI-RS resource configuration corresponds to the feedback configuration obtained by the terminal, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

The embodiment of the invention also provides a CSI feedback configuration method, which comprises the following steps:

the method comprises the steps that a terminal receives indication information sent by network side equipment through a first signaling, the indication information is used for indicating the terminal to obtain feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal;

and the terminal acquires the feedback configuration according to the indication information, determines the CSI required to be fed back, and feeds back the CSI to the network side equipment.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of a CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, the method further includes:

the terminal receives L link configurations configured by the network side equipment through a second signaling direction, wherein L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, the method further includes:

the terminal receives resource configuration and N feedback configuration of M CSI-RSs configured by the network side equipment through a third signaling, wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, the method further includes:

and the terminal performs receiving measurement on the CSI-RS sent by the network side equipment according to the CSI-RS resource configuration, wherein the CSI-RS resource configuration corresponds to the feedback configuration obtained by the terminal, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

An embodiment of the present invention further provides a network side device, including:

a first sending module, configured to send indication information to a terminal through a first signaling, where the indication information is used to indicate the terminal to obtain a feedback configuration, and the feedback configuration is used to indicate CSI that the terminal needs to feed back;

and the receiving module is used for receiving the CSI fed back by the terminal according to the feedback configuration.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of a CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, the network side device further includes:

a first configuration module, configured to configure L link configurations to the terminal through a second signaling, where L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, the network side device further includes:

a second configuration module, configured to configure resource configurations and N feedback configurations of M CSI-RSs to the terminal through a third signaling, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, the network side device further includes:

and a second sending module, configured to send a CSI-RS according to a CSI-RS resource configuration, where the CSI-RS resource configuration corresponds to a feedback configuration obtained by the terminal, and the CSI includes CSI measured by the terminal for the CSI-RS.

An embodiment of the present invention further provides a terminal, including:

a first receiving module, configured to receive indication information sent by a network side device through a first signaling, where the indication information is used to indicate the terminal to obtain a feedback configuration, and the feedback configuration is used to indicate CSI that the terminal needs to feed back;

and the feedback module is used for acquiring the feedback configuration according to the indication information, determining the CSI required to be fed back, and feeding back the CSI to the network side equipment.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of a CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, the terminal further includes:

a second receiving module, configured to receive L link configurations configured by the network side device through a second signaling direction, where L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, the terminal further includes:

a third receiving module, configured to receive resource configurations and N feedback configurations of M CSI-RSs that are configured by the network side device through a third signaling, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, the terminal further includes:

and the measurement module is used for performing receiving measurement on the CSI-RS sent by the network side equipment according to the CSI-RS resource configuration, the CSI-RS resource configuration corresponds to the CSI feedback configuration indicated by the indication information, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

The technical scheme of the invention at least has the following beneficial effects:

in the embodiment of the invention, network side equipment sends indication information to a terminal through a first signaling, wherein the indication information is used for indicating the terminal to acquire feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal; and the network side equipment receives the CSI fed back by the terminal according to the feedback configuration. Therefore, the terminal can perform CSI feedback according to the feedback configuration configured by the network side equipment, and the accuracy of CSI feedback can be improved.

Drawings

FIG. 1 is a diagram of a network architecture provided by an embodiment of the present invention;

fig. 2 is a flowchart of a CSI feedback configuration method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a link indication provided by an embodiment of the invention;

fig. 4 is a flowchart of another CSI feedback configuration method according to an embodiment of the present invention;

fig. 5 is a structural diagram of a network side device according to an embodiment of the present invention;

fig. 6 is a structural diagram of another network-side device according to an embodiment of the present invention;

fig. 7 is a block diagram of another network-side device according to an embodiment of the present invention;

fig. 8 is a block diagram of another network-side device according to an embodiment of the present invention;

fig. 9 is a structural diagram of a terminal according to an embodiment of the present invention;

fig. 10 is a block diagram of another terminal provided in an embodiment of the present invention;

fig. 11 is a block diagram of another terminal provided in an embodiment of the present invention;

fig. 12 is a block diagram of another terminal provided in an embodiment of the present invention;

fig. 13 is a block diagram of another network-side device according to an embodiment of the present invention;

fig. 14 is a block diagram of another terminal according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a network structure diagram provided in the embodiment of the present invention, and as shown in fig. 1, the network structure diagram includes a terminal 11 and a network-side Device 12, where the terminal 11 may be a terminal-side Device or a User Equipment (UE), such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that a specific type of the terminal 11 is not limited in the embodiment of the present invention. The terminal 11 may establish communication with the network-side device 12, where the network in the drawing may indicate that the terminal 11 wirelessly establishes communication with the network-side device 12, and the network-side device 12 may be a base station, where the base station may be a macro station, such as an LTE eNB, a 5G NR NB, or a gNB; or a small station, such as a Low Power Node (LPN) pico, a femto, or an Access Point (AP); the network side device 12 may also be a Central Unit (CU), or may be a Transmission Reception Point (TRP) managed and controlled by the CU. In addition, one or more cells (e.g., different frequency bins or sector splitting) are located under one network-side device 12. It should be noted that the specific type of the network-side device 12 is not limited in the embodiment of the present invention.

Referring to fig. 2, fig. 2 is a flowchart of a CSI feedback configuration method according to an embodiment of the present invention, as shown in fig. 2, including the following steps:

201. the network side equipment sends indication information to a terminal through a first signaling, wherein the indication information is used for indicating the terminal to acquire feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal.

202. And the network side equipment receives the CSI fed back by the terminal according to the feedback configuration.

The first signaling may be dynamic signaling, that is, the network side device may dynamically send the indication information to the terminal, so as to dynamically indicate CSI that the terminal needs to feed back. In addition, the indication information may indicate the terminal to acquire the feedback configuration by a direct indication manner, for example: the indication information may be the indication information of the feedback configuration, that is, the terminal directly obtains the feedback configuration through the indication information; or the indication information may indicate the terminal to acquire the feedback configuration in an indirect indication manner, for example: the indication information may be indication information of a certain link configuration, and the link configuration corresponds to a feedback configuration, so that the terminal acquires the link configuration through the indication information and acquires the feedback configuration through the link configuration.

In the embodiment of the present invention, the feedback configuration is used to indicate CSI that the terminal needs to feed back, for example: the CSI indicating that the terminal needs to feed back includes at least one of RI, PMI, CQI, and CRI, and in the embodiment of the present invention, the CSI is not limited to include only these, and other CSI may be configured by the foregoing method.

After receiving the indication information, the terminal may obtain the feedback configuration through the indication information, further determine the CSI that needs to be fed back, and then feed back the CSI to the network side device.

Through the steps, the CSI fed back by the terminal can be fed back according to the feedback configuration indicated by the network side equipment, so that the accuracy of CSI feedback can be improved. For example: the network side device needs the CQI, and then, corresponding indication information may be sent to the terminal, so that the terminal feeds back the CQI to the network side device. And because the terminal feeds back according to the feedback configuration, signaling overhead and equipment power consumption can be saved, because the terminal can only feed back corresponding CSI to the network side equipment, and does not need to feed back additional CSI, for example: for example: the network side equipment needs the PMI, and then, corresponding indication information can be sent to the terminal, so that the terminal can only feed back the PMI to the network side equipment, and does not need to acquire and feed back other CSI, such as CQI or RI.

Optionally, the method may further include:

and the network side equipment sends the CSI-RS according to the CSI-RS resource configuration, wherein the CSI-RS resource configuration corresponds to the feedback configuration obtained by the terminal, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

The CSI-RS resource configuration may be a resource configuration for the network side device to send the CSI-RS, or may be a resource configuration for the terminal to receive and measure the CSI-RS, that is, the terminal performs the CSI-RS reception measurement through the resource configuration to obtain the corresponding CSI. In addition, since the resource configuration of the CSI-RS corresponds to the feedback configuration obtained by the terminal, that is, the resource configuration of the CSI-RS is associated with the feedback configuration obtained by the terminal, when the resource configuration performs the reception measurement of the CSI-RS, the terminal may obtain the corresponding CSI according to the feedback configuration measurement and perform the feedback. Therefore, the corresponding feedback configuration can be configured for different resource configurations, namely, the corresponding CSI can be fed back for different resource configurations, so that the flexibility of the communication system can be improved.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of the CSI-RS corresponding to the feedback configuration.

In this embodiment, the simultaneous indication of the feedback configuration and the corresponding CSI-RS resource configuration can be achieved through the indication information, that is, the feedback configuration is associated with the CSI-RS resource configuration through the indication information, so that the terminal performs the CSI-RS reception measurement through the resource configuration and performs the corresponding CSI feedback according to the feedback configuration. Therefore, the CSI required to be fed back by the terminal can be flexibly configured.

It should be noted that, in the embodiment of the present invention, one feedback configuration may correspond to resource configurations of one or more CSI-RSs, that is, CSI-RS reception measurements performed by the terminal through the one or more resource configurations are all performed according to the feedback configuration to perform CSI feedback.

Of course, in the embodiment of the present invention, the resource configuration of the CSI-RS corresponding to the feedback configuration is not limited to be indicated by the indication information, and may be configured in advance for the terminal. For example: the feedback configuration may be valid within a preset time, that is, the CSI-RS resource configuration within the preset time may correspond to the feedback configuration, so that the terminal performs CSI feedback according to the feedback configuration within the preset time, thereby reducing the indication overhead of the resource configuration and achieving the purpose of saving signaling overhead.

Optionally, the resource configuration includes at least one of a port number and a period; the resource configuration here may be the resource configuration of any CSI-RS in the embodiments of the present invention;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

In this embodiment, the terminal can perform corresponding CSI-RS reception measurement according to the resource configuration, and feed back the corresponding CSI to the network side device, so as to improve the flexibility of the communication system, and facilitate adaptation to different demand scenarios or services.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Each link configuration corresponds to one feedback configuration, and the resource configuration of the at least one CSI-RS corresponding to the feedback configuration may be understood as that each link configuration associates one feedback configuration with one or more resource configurations. For example: the link configuration 1 associates the feedback configuration 1 with the resource configuration 1, and then the terminal performs reception measurement on the CSI-RS through the resource configuration 1 and feeds back corresponding CSI in the measurement result to the network side device according to the feedback configuration 1.

In this embodiment, at least one link configuration may be indicated to the terminal through the indication information, so that the terminal may obtain the at least one link configuration, the feedback configuration corresponding to each link configuration, and the corresponding resource configuration through the indication information.

Optionally, the method further includes:

the network side equipment configures L link configurations to the terminal through a second signaling, wherein L is an integer greater than or equal to 1; wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Wherein, the second signaling may be a higher layer signaling. In this embodiment, it may be implemented that L link configurations are first configured for the terminal, and then at least one link configuration is dynamically indicated through the indication information, and after the terminal receives the indication information, a corresponding link configuration may be selected from the L link configurations, so that the overhead of the indication information may be saved. Of course, in the embodiment of the present invention, the indication information is not limited to indicate at least one link configuration of the L link configurations, for example: the indication information may also be complete configuration information of the link configuration, i.e. the indication information directly indicates the content of the link configuration.

For example: taking L equal to 8 cases, the resource configuration includes: the method comprises the following steps of resource configuration 1, resource configuration 2, resource configuration 3 and resource configuration 4, wherein the feedback configuration comprises the following steps: feedback configuration 1, feedback configuration 2, feedback configuration 3, feedback configuration 4. Then, the link configuration can be as shown in table 1:

table 1:

	resource allocation	Feedback configuration
			Link 1(000)	Resource allocation 1	Feedback arrangement 1
Link 2(001)	Resource allocation 1	Feedback arrangement 2
			Link 3(010)	Resource allocation 3	Feedback arrangement 4
Link 4(011)	Resource allocation 2	Feedback arrangement 4
			Link 5(100)	Resource allocation 1, resource allocation 3	Feedback arrangement 3
Link 6(101)	Resource allocation 2, resource allocation 4	Feedback arrangement 2
			Link 7(110)	Resource allocation 4	Feedback arrangement 3
Link 8(111)	Resource allocation 4	Feedback arrangement 1

Thus, the network side device can indicate the terminal link information, such as the dynamic signaling indication (110), by 3-bit dynamic signaling, and then the terminal associates the resource configuration 4 and the feedback configuration 3.

It should be noted that the feedback configurations and resource configurations may be configured for the terminal when configuring L link configurations, that is, the link configurations include corresponding resource configurations and feedback configurations. Or the link configuration, and the resource configuration and the feedback configuration are configured separately, for example: the link configuration, the resource configuration and the feedback configuration are respectively configured through different high-level signaling, the link configuration can be an association relationship of the resource configuration and the feedback configuration, and therefore the terminal obtains the corresponding resource configuration and the corresponding feedback configuration through the association relationship.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap (bitmap) form or a coding form.

For example: as shown in fig. 3, the indication information indicated in the bitmap form may indicate the link configuration through L bits, so that when the number of indicated link configurations is large, signaling overhead may be saved.

Using the encoding format, it can be shown in table 2:

table 2:

thus, indicating the indication information in coded form requires log2(L) bits for indication, so that signaling overhead can be saved when the number of indication link configurations is small. When L is 8 as shown in table 2, 6 bits are needed if two links are to be indicated, and only 3 bits are needed to indicate one link.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

In this embodiment, it may be implemented that one indication information includes both the indication information of the feedback configuration and the indication information of the resource configuration of the CSI-RS corresponding to the feedback configuration. Namely, the feedback configuration is associated with the resource configuration through an indication message, so that only one signaling needs to be transmitted to the terminal, thereby saving transmission resources.

It should be noted that, in this embodiment, the indication information indicates both the indicated feedback configuration and the indicated resource configuration, but in the embodiment of the present invention, one link configuration corresponds to one feedback configuration and the corresponding resource configuration, and in this embodiment, the indication information may also be understood as indicating a feedback configuration corresponding to at least one link configuration and the corresponding resource configuration.

Optionally, the method further includes:

the network side equipment configures resource configuration and feedback configuration of M CSI-RSs to the terminal through a third signaling, wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1; wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

In this embodiment, the terminal may be configured with M CSI-RS resource configurations and N feedback configurations first, and then dynamically indicate a feedback configuration and one or more corresponding link configurations through the indication information, and after receiving the indication information, the terminal may select one feedback configuration from the N feedback configurations and select one or more corresponding CSI-RS resource configurations from the M resource configurations, so that overhead of the indication information may be saved. Of course, in the embodiment of the present invention, the indication information may also be complete configuration information of the feedback configuration and complete information of the corresponding resource configuration.

In addition, since the indication information may indicate at least one feedback configuration in this embodiment, the resource configuration of the CSI-RS indicated by the indication information is the resource configuration of the CSI-RS corresponding to the at least one feedback configuration, for example: the indication information indicates two feedback configurations, wherein the two feedback configurations correspond to one resource configuration and two resource configurations, respectively. Therefore, one or more feedback configurations and corresponding resource configurations are indicated to the terminal through one indication message, and transmission resources are saved.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

The bitmap indicating manner may refer to the above described bitmap indicating link configuration manner, which is not described herein again, and the same beneficial effects may be achieved. In addition, in the indication mode of the coding form, M resource configurations are coded by using log2(M) bits, and N feedback configurations are coded by using log2(N) bits, so that the feedback configuration and the resource configuration corresponding to one link configuration can use log2(M) + log2(N) bits. P × log2(M) + log2(N) bits are needed if one link corresponds to P (P < ═ M) resource configurations and one feedback configuration. For example: taking the example that both M and N are equal to 4, as shown in tables 3 and 4:

table 3:

bit information	Resource allocation
		00	1
01	2
		10	3
11	4

Table 4:

wherein 4 resource configurations are represented by 2 bits and 4 feedback configurations are represented by 2 bits. Thus, the network side device can dynamically configure the resource configuration and the link of the feedback configuration through the first signaling, for example: the link configuration for resource configuration 1 and feedback configuration 1 can be represented by 4 bits of 00 (resource configuration) and 00 (feedback configuration). The link configurations for resource configuration 1, resource configuration 2, and feedback configuration 1 can be represented by 6 bits of 00 (resource configuration), 01 (resource configuration), and 00 (feedback configuration).

It should be noted that, the various alternative embodiments described above may be implemented in combination with each other or separately, and the embodiment of the present invention is not limited thereto.

In the embodiment of the invention, network side equipment sends indication information to a terminal through a first signaling, wherein the indication information is used for indicating the terminal to acquire feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal; and the network side equipment receives the CSI fed back by the terminal according to the feedback configuration. Therefore, the terminal can perform CSI feedback according to the feedback configuration configured by the network side equipment, and the accuracy of CSI feedback can be improved.

Referring to fig. 4, fig. 4 is a flowchart of another CSI feedback configuration method according to an embodiment of the present invention, as shown in fig. 4, including the following steps:

401. the method comprises the steps that a terminal receives indication information sent by network side equipment through a first signaling, the indication information is used for indicating the terminal to obtain feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal;

402. and the terminal acquires the feedback configuration according to the indication information, determines the CSI required to be fed back, and feeds back the CSI to the network side equipment.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of a CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, the method further includes:

the terminal receives L link configurations configured by the network side equipment through a second signaling direction, wherein L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, the method further includes:

the terminal receives resource configuration and N feedback configuration of M CSI-RSs configured by the network side equipment through a third signaling, wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, the method further includes:

and the terminal performs receiving measurement on the CSI-RS sent by the network side equipment according to the CSI-RS resource configuration, wherein the CSI-RS resource configuration corresponds to the feedback configuration obtained by the terminal, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

It should be noted that, this embodiment is used as an implementation of the terminal corresponding to the embodiment shown in fig. 2, and specific implementations thereof may refer to the relevant description of the embodiment shown in fig. 2, and in order to avoid repeated descriptions, this embodiment is not described again. In this embodiment, the terminal performs CSI feedback according to the feedback configuration configured by the network side device, so that accuracy of CSI feedback can be improved.

Referring to fig. 5, fig. 5 is a structural diagram of a network side device according to an embodiment of the present invention, and as shown in fig. 5, the network side device 500 includes:

a first sending module 501, configured to send, by using a first signaling, indication information to a terminal, where the indication information is used to indicate the terminal to obtain feedback configuration, and the feedback configuration is used to indicate CSI that the terminal needs to feed back;

a receiving module 502, configured to receive the CSI fed back by the terminal according to the feedback configuration.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of a CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, as shown in fig. 6, the network side device 500 further includes:

a first configuring module 503, configured to configure L link configurations to the terminal through a second signaling, where L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, as shown in fig. 7, the network side device 500 further includes:

a second configuring module 504, configured to configure resource configurations and N feedback configurations of M CSI-RSs to the terminal through a third signaling, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, as shown in fig. 8, the network side device 500 further includes:

a second sending module 505, configured to send a CSI-RS according to a CSI-RS resource configuration, where the CSI-RS resource configuration corresponds to a feedback configuration obtained by the terminal, and the CSI includes CSI measured by the terminal for the CSI-RS.

It should be noted that, in this embodiment, the network-side device 500 may be a network-side device according to any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 500 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 9, fig. 9 is a structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 9, the terminal 900 includes:

a first receiving module 901, configured to receive indication information sent by a network side device through a first signaling, where the indication information is used to indicate the terminal to obtain a feedback configuration, and the feedback configuration is used to indicate CSI that the terminal needs to feed back;

a feedback module 902, configured to obtain the feedback configuration according to the indication information, determine CSI that needs to be fed back, and feed back CSI to the network side device.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of a CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, as shown in fig. 10, the terminal 900 further includes:

a second receiving module 903, configured to receive L link configurations configured by the network side device through a second signaling direction, where L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, as shown in fig. 11, the terminal 900 further includes:

a third receiving module 904, configured to receive resource configurations and N feedback configurations of M CSI-RSs that are configured by the network side device through a third signaling, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, as shown in fig. 12, the terminal 900 further includes:

a measurement module 905, configured to perform receiving measurement on a CSI-RS sent by the network side device according to a resource configuration of the CSI-RS, where the resource configuration of the CSI-RS corresponds to a feedback configuration of the CSI indicated by the indication information, and the CSI includes CSI measured by the terminal for the CSI-RS.

It should be noted that, in this embodiment, the terminal 900 may be a terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the terminal in the method embodiment of the present invention may be implemented by the terminal 900 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 13, fig. 13 is a structural diagram of another network-side device according to an embodiment of the present invention, as shown in fig. 13, including: a processor 1300, a transceiver 1310, a memory 1320, a user interface 1330, and a bus interface, wherein:

a processor 1300, for reading the program in the memory 1320, for executing the following processes:

sending, by using a transceiver 1310, indication information to a terminal through a first signaling, where the indication information is used to indicate that the terminal acquires a feedback configuration, and the feedback configuration is used to indicate that the terminal needs to feed back CSI;

receiving, with a transceiver 1310, the CSI fed back by the terminal according to the feedback configuration.

Among other things, the transceiver 1310 is used for receiving and transmitting data under the control of the processor 1300.

In fig. 13, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1300 and various circuits of memory represented by memory 1320 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. User interface 1330 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1300 in performing operations.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of the CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, the processor 1300 is further configured to:

configuring L link configurations to the terminal through a second signaling by using a transceiver 1310, wherein L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, the processor 1300 is further configured to:

configuring resource configurations and N feedback configurations of M CSI-RSs to the terminal through a third signaling by using a transceiver 1310, wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, the processor 1300 is further configured to:

and transmitting, by using the transceiver 1310, a CSI-RS according to the CSI-RS resource configuration, where the CSI-RS resource configuration corresponds to the feedback configuration obtained by the terminal, and the CSI includes CSI measured by the terminal for the CSI-RS.

It should be noted that, in this embodiment, the network-side device may be the network-side device in the embodiment shown in fig. 1 to 4, and any implementation of the network-side device in the embodiment shown in fig. 1 to 4 may be implemented by the network-side device in this embodiment to achieve the same beneficial effects, and details are not repeated here.

Referring to fig. 14, fig. 14 is a structural diagram of another terminal according to an embodiment of the present invention, as shown in fig. 14, including: a processor 1400, a transceiver 1410, a memory 1420, a user interface 1430, and a bus interface, wherein:

the processor 1400 is used for reading the program in the memory 1420 and executing the following processes:

receiving, by a transceiver 1410, indication information sent by a network side device through a first signaling, where the indication information is used to indicate the terminal to obtain feedback configuration, and the feedback configuration is used to indicate CSI that the terminal needs to feed back;

and obtaining the feedback configuration according to the indication information through the transceiver 1410, determining CSI which needs to be fed back, and feeding back CSI to the network side device.

Among other things, the transceiver 1410 is used for receiving and transmitting data under the control of the processor 1400.

In fig. 14, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1400 and various circuits of memory represented by memory 1420 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1410 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1430 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1400 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1400 in performing operations.

Optionally, the indication information is further used to indicate the terminal to obtain a resource configuration of a CSI-RS corresponding to the feedback configuration.

Optionally, the resource configuration includes at least one of a port number and a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

Optionally, the indication information includes indication information of at least one link configuration, and each link configuration corresponds to a feedback configuration, and a resource configuration of at least one CSI-RS corresponding to the feedback configuration.

Optionally, the processor 1400 is further configured to:

receiving, by a transceiver 1410, L link configurations configured by the network-side device through a second signaling direction, where L is an integer greater than or equal to 1;

wherein the indication information is used for indicating at least one link configuration of the L link configurations.

Optionally, the indication information indicates at least one link configuration of the L link configurations in a bitmap form or an encoded form.

Optionally, the indication information includes indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration.

Optionally, the processor 1400 is further configured to:

receiving, by a transceiver 1410, resource configurations and N feedback configurations of M CSI-RSs configured by the network side device through a third signaling, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

Optionally, the indication information of the feedback configuration indicates, in a bitmap form or an encoded form, at least one of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS indicates, in a bitmap form or an encoded form, the resource configuration of at least one of the M resource configurations of the CSI-RS.

Optionally, the processor 1400 is further configured to:

and performing receiving measurement on the CSI-RS sent by the network side equipment according to the resource configuration of the CSI-RS through a transceiver 1410, wherein the resource configuration of the CSI-RS corresponds to the feedback configuration obtained by the terminal, and the CSI comprises CSI measured by the terminal for the CSI-RS.

It should be noted that, the terminal in this embodiment may be the terminal in the embodiment shown in fig. 1 to 4, and any implementation of the terminal in the embodiment shown in fig. 1 to 4 may be implemented by the terminal in this embodiment to achieve the same beneficial effects, which is not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (16)

1. A CSI feedback configuration method is characterized by comprising the following steps:

the method comprises the steps that network side equipment sends indication information to a terminal through a first signaling, wherein the indication information is used for indicating the terminal to obtain feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal;

the network side equipment receives the CSI fed back by the terminal according to the feedback configuration;

the method further comprises the following steps:

the network side equipment configures L link configurations to the terminal through a second signaling, wherein L is an integer greater than or equal to 1;

the indication information indicates at least one link configuration in the L link configurations in a bitmap form or a coded form, each link configuration corresponds to a feedback configuration, and the resource configuration of at least one CSI-RS corresponding to the feedback configuration includes the port number;

the indication information further comprises indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration;

the method further comprises the following steps:

the network side equipment configures resource configuration and feedback configuration of M CSI-RSs to the terminal through a third signaling, wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

2. The method of claim 1, wherein the indication information is further used for indicating the terminal to acquire a resource configuration of a channel state information reference signal (CSI-RS) corresponding to the feedback configuration.

3. The method of claim 2, wherein the resource configuration further comprises a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of Rank Indication (RI), Precoding Matrix Indication (PMI), Channel Quality Indication (CQI) and Channel Reservation Information (CRI).

4. The method of any one of claims 1-3, further comprising:

and the network side equipment sends the CSI-RS according to the CSI-RS resource configuration, wherein the CSI-RS resource configuration corresponds to the feedback configuration obtained by the terminal, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

5. A CSI feedback configuration method is characterized by comprising the following steps:

the method comprises the steps that a terminal receives indication information sent by network side equipment through a first signaling, the indication information is used for indicating the terminal to obtain feedback configuration, and the feedback configuration is used for indicating CSI required to be fed back by the terminal;

the terminal acquires the feedback configuration according to the indication information, determines CSI required to be fed back, and feeds back the CSI to the network side equipment;

the method further comprises the following steps:

the terminal receives L link configurations configured by the network side equipment through a second signaling direction, wherein L is an integer greater than or equal to 1;

the indication information indicates at least one link configuration in the L link configurations in a bitmap form or a coded form, each link configuration corresponds to a feedback configuration, and the resource configuration of at least one CSI-RS corresponding to the feedback configuration includes the port number;

the indication information further comprises indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration;

the method further comprises the following steps:

the terminal receives resource configuration and N feedback configuration of M CSI-RSs configured by the network side equipment through a third signaling, wherein M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

6. The method of claim 5, wherein the indication information is further used for indicating the terminal to acquire a resource configuration of a channel state information reference signal (CSI-RS) corresponding to the feedback configuration.

7. The method of claim 6, wherein the resource configuration further comprises a period;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

8. The method of any one of claims 5-7, further comprising:

and the terminal performs receiving measurement on the CSI-RS sent by the network side equipment according to the CSI-RS resource configuration, wherein the CSI-RS resource configuration corresponds to the feedback configuration obtained by the terminal, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

9. A network-side device, comprising:

a first sending module, configured to send indication information to a terminal through a first signaling, where the indication information is used to indicate the terminal to obtain a feedback configuration, and the feedback configuration is used to indicate CSI that the terminal needs to feed back;

a receiving module, configured to receive the CSI fed back by the terminal according to the feedback configuration;

the network side device further includes:

a first configuration module, configured to configure L link configurations to the terminal through a second signaling, where L is an integer greater than or equal to 1;

the indication information indicates at least one link configuration in the L link configurations in a bitmap form or a coded form, each link configuration corresponds to a feedback configuration, and the resource configuration of at least one CSI-RS corresponding to the feedback configuration includes the port number;

the indication information further comprises indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration;

the network side device further includes:

a second configuration module, configured to configure resource configurations and N feedback configurations of M CSI-RSs to the terminal through a third signaling, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

10. The network-side device of claim 9, wherein the indication information is further used to instruct the terminal to acquire a resource configuration of a CSI-RS corresponding to the feedback configuration.

11. The network-side device of claim 10, wherein the resource configuration further comprises a periodicity;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

12. The network-side device of any one of claims 9-11, wherein the network-side device further comprises:

and a second sending module, configured to send a CSI-RS according to a CSI-RS resource configuration, where the CSI-RS resource configuration corresponds to a feedback configuration obtained by the terminal, and the CSI includes CSI measured by the terminal for the CSI-RS.

13. A terminal, comprising:

a first receiving module, configured to receive indication information sent by a network side device through a first signaling, where the indication information is used to indicate the terminal to obtain a feedback configuration, and the feedback configuration is used to indicate CSI that the terminal needs to feed back;

the feedback module is used for acquiring the feedback configuration according to the indication information, determining CSI required to be fed back, and feeding back the CSI to the network side equipment;

the terminal further comprises:

a second receiving module, configured to receive L link configurations configured by the network side device through a second signaling direction, where L is an integer greater than or equal to 1;

the indication information indicates at least one link configuration in the L link configurations in a bitmap form or a coded form, each link configuration corresponds to a feedback configuration, and the resource configuration of at least one CSI-RS corresponding to the feedback configuration includes the port number;

the indication information further comprises indication information of the feedback configuration and indication information of resource configuration of CSI-RS corresponding to the feedback configuration;

the terminal further comprises:

a third receiving module, configured to receive resource configurations and N feedback configurations of M CSI-RSs that are configured by the network side device through a third signaling, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1;

wherein the indication information of the feedback configuration is used for indicating at least one feedback configuration of the N feedback configurations, and the indication information of the resource configuration of the CSI-RS is used for indicating the resource configuration of at least one CSI-RS of the resource configurations of the M CSI-RSs.

14. The terminal of claim 13, wherein the indication information is further used for indicating the terminal to acquire a resource configuration of a channel state information reference signal (CSI-RS) corresponding to the feedback configuration.

15. The terminal of claim 14, wherein the resource configuration further includes a periodicity;

the feedback configuration is used for indicating that the terminal needs to feed back at least one of RI, PMI, CQI and CRI.

16. The terminal according to any of claims 13-15, characterized in that the terminal further comprises:

and the measurement module is used for performing receiving measurement on the CSI-RS sent by the network side equipment according to the CSI-RS resource configuration, the CSI-RS resource configuration corresponds to the CSI feedback configuration indicated by the indication information, and the CSI comprises the CSI measured by the terminal aiming at the CSI-RS.

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