WO2013155977A1

WO2013155977A1 - Csi reporting control method, csi reporting method and device

Info

Publication number: WO2013155977A1
Application number: PCT/CN2013/074391
Authority: WO
Inventors: 苏昕; 张然然; 荆梅芳; 拉盖施
Original assignee: 电信科学技术研究院
Priority date: 2012-04-20
Filing date: 2013-04-19
Publication date: 2013-10-24
Also published as: CN102638337A; CN102638337B

Abstract

Disclosed are a CSI reporting control method, a CSI reporting method and device. The CSI reporting control method includes: from a frequency domain granularity set upon sub-band CSI reporting corresponding to a combination of a current system bandwidth and a CSI reporting mode configured for user equipment, selecting a frequency domain granularity upon sub-band CSI reporting for the sub-band CSI information required to be reported by the user equipment; and transmitting the configuration information of the frequency domain granularity upon sub-band CSI reporting to the user equipment, the configuration information carrying the frequency domain granularity upon sub-band CSI reporting which is selected for the sub-band CSI information required to be reported by the user equipment. Since a CSI reporting mode and system bandwidth group can correspond to a plurality of frequency domain granularities upon sub-band CSI reporting, network-side equipment can select one frequency domain granularity upon sub-band CSI reporting therefrom, and transmit the selected frequency domain granularity upon sub-band CSI reporting to user equipment, which improves the flexibility of configuration of a frequency domain granularity upon sub-band CSI reporting.

Description

CSI reporting control method, CSI reporting method and device The application is submitted to the Chinese Patent Office on April 20, 2012, the application number is 201210119226.4, and the invention name is

The priority of the Chinese Patent Application, the disclosure of which is incorporated herein by reference. The present invention relates to the field of communications technologies, and in particular, to a CSI reporting control method and apparatus, and a CSI reporting method and apparatus. BACKGROUND OF THE INVENTION Two forms of CSI (Channel State) are supported in an LTE (Long Term Evolution) system.

Information, channel status information) feedback scheme: periodic CSI reporting and aperiodic CSI reporting. The periodic CSI is usually performed through the PUCCH (Physical Uplink Control Channel). If the UE (terminal) is periodically scheduled to transmit CSI, and the data is scheduled to be transmitted at the same time, the periodic CSI report will be performed through the PUSCH (Physical Uplink Shared Channel). Aperiodic CSI reporting is performed through PUSCH. The CSI may be one or any combination of RI ( Rank Indicator), PMI (Pre-Coding Matrix Indicator), CQI (Channel Quality Indicator).

For example, the non-periodic CSI reporting process based on the PUSCH defined by the existing specification includes five CSI reporting modes. For the CSI reporting mode that needs to be reported to the PMI, the three CSI reporting modes shown in Table 1 can be used:

Table 1

In Table 1, the CSI reporting mode 1-2 based on the PUSCH needs to report the CQI and the PMI. Specifically, the UE is required. The PMI W1 (Broadband PMI WI) for the entire system bandwidth is required to be reported by the UE based on the primary codebook (W1); and the sub-band PMI W2 is required to be reported by the UE based on the secondary codebook (W2).

Based on the PUSCH-based CSI reporting mode 2-2, CQI and PMI need to be reported. Specifically, the UE needs to report a broadband CQI and report the sub-band CQI for the selected M sub-bands; based on the first-level codebook, the UE needs to report the broadband PMI WI; based on the second-level codebook, the UE needs to report the broadband PMI W2, and The subband PMI W2 for the selected M subbands is reported.

Based on the PUSCH-based CSI reporting mode 3-1, CQI and PMI need to be reported. Specifically, the UE needs to report the sub-band CQI; based on the first-level codebook, the UE needs to report the broadband PMI W1; based on the second-level codebook, the UE needs to report the broadband PMI W2.

To further improve the feedback accuracy, PUSCH-based mode 3-2 may be introduced in subsequent releases of LTE (as shown in Table 2):

Table 2

In the above CSI reporting mode, the frequency-domain granularity when sub-band CSI (sub-band CSI refers to sub-band CQI and/or sub-band PMI) is reported depends on system bandwidth and CSI.

The frequency domain granularity when the sub-band CSI is reported refers to the bandwidth of the sub-band for which the CSI feedback is directed. If the sub-band CSI to be reported includes both the sub-band CQI and the sub-band PMI, the frequency-domain granularity at 4 艮 on the sub-band CQI is the same as the frequency-domain granularity at 4 子 on the sub-band PMI.

Then, for the above-mentioned PUSCH-based CSI reporting modes 1-2 and 3-1, the frequency domain granularity at 4 子 on the sub-band CSI is defined by Table 3.

table 3

System bandwidth subband frequency domain granularity when CSI is reported

6 - 7 NA

8 -

4

10

11 -

4

26 27 -

6

63

64 -

8

110, where the system bandwidth WRB and the subband CSI are used to describe the frequency domain granularity k in RB. For example, when the system bandwidth is 64-110 RBs, the frequency domain granularity k at 4 子 on the sub-band CSI is 8 RBs. For a system bandwidth of 6-7 RBs, the frequency domain granularity k when the sub-band CSI is reported is NA (indicating all RBs included in the system bandwidth).

For the above-mentioned PUSCH-based CSI reporting mode 2-2, the frequency domain granularity when the sub-band CSI is reported is defined by Table 4.

Table 4

In the CSI feedback scheme of the existing LTE system, when the CSI mode and the system bandwidth are determined, the frequency domain granularity of the sub-band CSI is uniquely determined, and the frequency domain of the sub-band CSI is 艮The configuration of the granularity is not flexible. SUMMARY OF THE INVENTION An object of the present invention is to provide a CSI reporting control method, a CSI method, and a device for solving the problem of inflexible frequency domain granularity configuration when an existing sub-band CSI is reported.

The object of the invention is achieved by the following technical solutions:

A channel state information CSI · 艮 control method, including:

Selecting a sub-band CSI for the sub-band CSI information to be reported by the terminal from the current system bandwidth and the frequency-domain granularity set on the sub-band CSI corresponding to the combination of CSIs configured for the terminal Frequency domain granularity, said The frequency domain granularity set when the sub-band CSI is reported includes the frequency domain granularity when the at least one sub-band CSI is reported; and the frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal, the sub-band The frequency domain granularity configuration information of the sub-band CSI selected for the sub-band CSI information to be reported by the terminal is carried in the frequency domain granularity configuration information of the sub-band CSI information to be reported by the terminal.

A channel state information CSI reporting method includes:

The frequency domain granularity configuration information when the sub-band CSI is reported by the network side device is received, and the frequency domain granularity configuration information of the sub-band CSI reporting is carried by the network side device to select the sub-band CSI information to be reported by the terminal. The frequency domain granularity when the sub-band CSI is reported, and the frequency domain granularity when the sub-band CSI is reported is a sub-correspondence corresponding to the combination of the current system bandwidth and the CSI on the CSI configured for the terminal by the network side device. The frequency domain granularity set when the sub-band CSI is reported includes the frequency domain granularity when the sub-band CSI is reported, and is selected in the frequency domain granularity set when the CSI is used.

Calculating sub-band CSI information according to frequency domain granularity when the sub-band CSI is reported;

According to the CSI on the terminal configured for the terminal, the sub-band CSI information is extracted at a predetermined time. A channel state information CSI on the control device, including:

The frequency domain granularity configuration module is configured to: in the frequency domain granularity set on the sub-band CSI corresponding to the combination of the current system bandwidth and the CSI reporting mode configured for the terminal, the terminal needs to be 4艮The CSI information is used to select the frequency domain granularity at 4 子 on the sub-band CSI, and the frequency-domain granularity set at 4 艮 on the sub-band CSI includes at least one sub-band CSI.

• Frequency domain granularity at the time of ;;

a configuration information sending module, configured to send the frequency domain granularity configuration information when the sub-band CSI is reported to the terminal, where the frequency domain granularity configuration information of the sub-band CSI is carried as the terminal needs to be 4 The frequency domain granularity of the sub-band CSI selected by the sub-band CSI information of the sub-band.

A channel status information CSI reporting device includes:

a configuration information receiving module, configured to receive frequency domain granularity configuration information when the sub-band CSI is reported by the network side device, where the frequency domain granularity configuration information of the sub-band CSI carries the network side device The frequency domain granularity of the sub-band CSI reported by the sub-band CSI information is required by the terminal, and the frequency domain granularity of the sub-band CSI reporting is determined by the network side device from the current system bandwidth and is the terminal. The frequency domain granularity set when the sub-band CSI is reported on the sub-band CSI is selected by the combination of the configured CSI reporting mode, and the frequency domain granularity set of the sub-band CSI includes at least one sub-band CSI. Frequency domain granularity;

The CSI information calculation module is configured to calculate sub-band CSI information according to the frequency domain granularity of the sub-band CSI reporting, and the CSI reporting module is configured to report the CSI reporting mode configured for the terminal at a predetermined reporting time. The subband CSI information.

According to the technical solution provided by the foregoing embodiment of the present invention, the network side device can select one sub-subsection according to the foregoing processing procedure, because a set of csi pop-up and system bandwidth can correspond to frequency domain granularity when multiple sub-band CSIs are reported. The frequency domain granularity when the CSI is reported is sent to the terminal, and the frequency domain granularity when the selected sub-band CSI is reported is sent to the terminal, which improves the flexibility of the frequency domain granularity configuration when the sub-band CSI is 4艮. 1 is a flowchart of a CSI reporting control method according to an embodiment of the present invention;

2 is a flowchart of a method for CSI on a CSI according to an embodiment of the present invention;

3 is a schematic structural diagram of a CSI report control device according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a CSI reporting apparatus according to an embodiment of the present invention. The embodiment of the present invention provides a CSI control method, which is implemented as shown in FIG. 1 and specifically includes the following operations:

Step 100: Select a sub-band CSI on the sub-band CSI information that is required to be sent by the sub-band CSI information corresponding to the sub-band CSI reporting corresponding to the combination of the current system bandwidth and the CSI reporting mode configured for the terminal. Frequency domain granularity;

The frequency domain granularity set of the sub-band CSI at 4 包含 includes the frequency domain granularity of at least one sub-band CSI. That is to say, a set of CSI reporting modes and system bandwidths can correspond to frequency domain granularity when multiple sub-band CSIs are reported.

Step 110: Send the frequency domain granularity configuration information when the sub-band CSI is reported to the terminal, where the frequency domain granularity configuration information of the sub-band CSI reporting carries the sub-band CSI information of the terminal in step 100. The frequency domain granularity of the selected subband CSI is reported.

The frequency domain granularity configuration information when the sub-band CSI is reported may be sent by physical layer signaling or higher layer signaling, or may be sent by other messages sent to the terminal, or may be sent as a separate message.

The frequency domain granularity when a sub-band CSI is reported may be selected by the network side device (for example, e B ) according to the foregoing processing procedure, because a set of CSI reporting mode and system bandwidth may correspond to frequency domain granularity when multiple sub-band CSIs are reported. And transmitting the selected frequency band granularity of the sub-band CSI to the terminal, thereby improving the flexibility of the frequency domain granularity configuration when the sub-band CSI is on the 。.

Communication system performance is highly dependent on the choice of scheduling algorithm. If the terminal can feed back richer CSI, it is more advantageous for the network side to schedule the appropriate terminal in the proper resource and transmit it in an appropriate transmission manner. The larger the frequency domain granularity when the sub-band CSI is reported, the richer the CSI fed back by the terminal. On the other hand, the selection of the frequency domain granularity when the sub-band CSI is reported has an impact on the feedback overhead, feedback resources and power loss. The eNB needs to configure the frequency domain granularity for the sub-band CSI according to the change of the application environment and the needs of data transmission and scheduling. Among them, the changes of the application environment and the need for data transmission and scheduling are reflected by the actual situation of the channel. Specific to the implementation of the present invention, in order to make the terminal The reported sub-band CSI information can be matched with the actual situation of the channel, so that the sub-band CSI information can better reflect the actual situation of the channel, thereby improving system performance. Preferably, the specific implementation manner of the foregoing step 110 may be: In the actual case, the frequency domain granularity at the sub-band CSI is selected from the frequency domain granularity set when the sub-band CSI is reported corresponding to the combination of the current system bandwidth and the CSI reporting mode configured for the terminal.

The actual situation of the channel includes any one or more of the following combinations: frequency selectivity of the channel, capacity of the feedback channel for reporting the sub-band CSI information, path loss of the channel uplink power, and other possible sub-band CSI reporting Frequency domain granularity related channel parameters and so on.

The frequency selectivity of a channel often depends on the multipath distribution in the propagation environment and therefore changes as the terminal moves. When the frequency selectivity is high, the frequency domain correlation of the channel is low. If the frequency domain granularity is used, the sub-band CSI information cannot reflect the fluctuation of the channel well. In this case, the terminal needs to be reported. The sub-band CSI information selects the frequency domain granularity at 4 较大 on the larger sub-band CSI. When the frequency selectivity of the channel is low, the frequency domain correlation of the channel is high. If a large frequency domain granularity is used, there is a large redundancy between the CSI information of each sub-band, which leads to waste of feedback overhead. In this case, the frequency domain granularity of the smaller sub-band CSI reporting needs to be selected for the sub-band CSI information that the terminal needs to report.

The capacity of the feedback channel used for the upper 4 艮 sub-band CSI information also affects the selection of the frequency domain granularity at 4 子 on the sub-band CSI to some extent. If the number of active terminals in the cell is large, the capacity of the feedback channel is insufficient, and the eNB wants to obtain the sub-band CSI information of the terminal, the smaller sub-band CSI may be selected for the CSI information of the terminal. on

• Frequency domain granularity at the time of 。. On the other hand, if the number of active terminals in the cell is small and the capacity of the feedback channel is sufficient, the frequency domain granularity of the larger sub-band CSI reporting may be selected for the CSI information to be reported by the terminal, so as to provide richer CSI information.

When the terminal is close to the eNB, the path loss of the uplink power of the terminal (that is, the path loss of the channel uplink power) is small, and the frequency domain granularity when the large sub-band CSI is reported can be selected. Conversely, the frequency domain granularity when the smaller sub-band CSI is reported can be selected to reduce the power consumed by the feedback.

The larger the bandwidth of the subband to which the CSI feedback is, the smaller the frequency domain granularity at 4 艮 on the corresponding subband CSI; conversely, the larger the bandwidth of the subband for the CSI feedback, the corresponding subband CSI The smaller the frequency domain granularity at the time of reporting.

In actual application, the actual situation of the channel is determined by the above multiple channel parameters. When selecting the frequency domain granularity when the sub-band CSI is reported, it is necessary to comprehensively consider the frequency domain granularity that may be related to the sub-band CSI reporting. Channel parameters. The specific selection criteria can be configured according to the actual application scenario in the application process, and can be realized by those skilled in the art without any creative work.

The CSI control method provided by the present invention will be described in detail below with reference to specific application embodiments.

Application Example 1

In the non-periodic CSI process, if the terminal needs to report the sub-band CQI and the sub-band PMI, the process of controlling the CSI reporting by the eNB specifically includes the following operations: Steps 200 and e B select a subband corresponding to the combination of the current system bandwidth and the combination of the four modes of the CSI configured for the terminal according to the first correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. The frequency domain granularity when the CSI is reported is used as the frequency domain granularity when the subband CQI selected for the subband CQI to be reported by the terminal is reported.

The first correspondence relationship refers to the correspondence between the CSI on the CSI, the system bandwidth, and the frequency domain granularity when the sub-band CSI is reported in the existing LTE communication standard. For example, if the CSI reporting mode is based on the PUSCH-based CSI mode 1-2 or 3-1, the first correspondence may be as shown in Table 3. If the CSI on the CSI mode is the PUSCH-based CSI reporting mode 2-2, the first correspondence may be as shown in Table 4.

Step 210: The eNB, according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported, the multiple sub-band CSIs corresponding to the current system bandwidth and the CSI combination configured for the terminal. In the frequency domain granularity at the time of reporting, the frequency domain granularity when the sub-band PMI is reported is selected for the sub-band PMI to be reported by the terminal.

In the foregoing second correspondence, the frequency domain granularity set on the sub-band CSI includes the frequency domain granularity at 4 上 on the plurality of sub-bands CSI.

Preferably, the eNB selects from the current system bandwidth and the CSI configured for the terminal according to the actual situation of the channel and according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. In the frequency domain granularity when the CSIs of the plurality of subbands are combined, the frequency domain granularity at the time of the subband PMI is selected for the subband PMI to be reported by the terminal. The description of the actual situation of the channel is described in the foregoing embodiment of the present invention, and details are not described herein again.

It should be noted that the present invention does not limit the sequence of steps 200 and 210 described above. Step 220: The eNB sends the frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal, and the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band CQI selected by the terminal. The frequency domain granularity when the CQI is reported, and the frequency domain granularity when the subband PMI selected for the subband PMI of the terminal is selected.

According to the method provided by the first embodiment of the present invention, when the sub-band CQI and the sub-band PMI need to be reported at the same time, the frequency-domain granularity of the sub-band CQI and the sub-band PMI is reported respectively, so that the frequency of reporting the sub-band CSI is reported. The configuration of the domain granularity is more flexible and can better reflect the actual situation of the channel.

Application Example 2

In the non-periodic CSI process, if the terminal needs to report the sub-band CQI and the sub-band PMI, the process of controlling the CSI reporting by the eNB includes the following operations:

Step 300: The eNB selects multiple sub-band CSIs corresponding to the combination of the current system bandwidth and the CSI type configured for the terminal according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. In the frequency domain granularity at the time of reporting, the frequency domain granularity when the sub-band CQI is reported is selected for the sub-band CQI to be reported by the terminal.

Preferably, the eNB selects from the current system bandwidth and the CSI configured for the terminal according to the actual situation of the channel and according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. In the frequency domain granularity of the multiple sub-band CSIs reported by the combination, the sub-band CQI is selected as the sub-band CQI to be reported by the terminal. The frequency domain granularity of the upper ί艮. The description of the actual situation of the channel is described in the foregoing embodiment of the present invention, and details are not described herein again.

Step 310: The e B selects a subband corresponding to a combination of a current system bandwidth and a combination of a CSI mode configured for the terminal according to a first correspondence between a CSI reporting mode, a system bandwidth, and a frequency domain granularity set when the sub-band CSI is reported. The frequency domain granularity at 4 C on the CSI is the frequency domain granularity at 4 子 on the sub-band PMI selected for the sub-band PMI of the terminal.

It should be noted that the present invention does not limit the sequence of steps 300 and 310 described above. Step 320: The eNB sends the frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal, and the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band CQI selected by the terminal. The frequency domain granularity when the CQI is reported, and the frequency domain granularity when the subband PMI selected for the subband PMI to be reported by the terminal is reported.

For the explanation of the first correspondence relationship and the second correspondence relationship in the second embodiment, reference may be made to the application embodiment 1, and details are not described herein again.

According to the method provided by the second embodiment of the present invention, when the sub-band CQI and the sub-band PMI need to be reported at the same time, the frequency-domain granularity of the sub-band CQI and the sub-band PMI are respectively reported, so that the frequency of the sub-band CSI is reported. The configuration of the domain granularity is more flexible and can better reflect the actual situation of the channel.

Application Example 3

Step 400: The eNB performs multiple sub-band CSIs corresponding to the combination of the current system bandwidth and the CSI type configured for the terminal according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. In the frequency domain granularity at the time of reporting, the frequency domain granularity when the sub-band CQI is reported is selected for the sub-band CQI to be reported by the terminal.

Preferably, the eNB selects from the current system bandwidth and the CSI configured for the terminal according to the actual situation of the channel and according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. In the frequency domain granularity when the CSI of the sub-bands corresponding to the combination is combined, the frequency-domain granularity of the sub-band CQI on the CQI is selected for the sub-band CQI to be reported by the terminal. The description of the actual situation of the channel is described in the foregoing embodiment of the present invention, and details are not described herein again.

Step 410: The eNB selects multiple sub-band CSIs corresponding to the combination of the current system bandwidth and the CSI type configured for the terminal according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. In the frequency domain granularity at the time of reporting, the frequency domain granularity when the sub-band PMI is reported is selected for the sub-band PMI to be reported by the terminal.

Preferably, the eNB selects from the current system bandwidth and the CSI configured for the terminal according to the actual situation of the channel and according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported. In the frequency domain granularity when the CSIs of the plurality of subbands are combined, the frequency domain granularity at the time of the subband PMI is selected for the subband PMI to be reported by the terminal. The description of the actual situation of the channel is described in the above embodiment of the present invention, here No longer.

It should be noted that the present invention does not limit the sequence of steps 400 and 410 described above. Step 420: The e B transmits the frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal, and the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band CQI selected by the terminal. The frequency domain granularity when the subband CQI is reported, and the frequency domain granularity when the subband PMI selected for the subband PMI to be reported by the terminal is reported.

For the explanation of the second correspondence in the third embodiment, reference may be made to the application embodiment 1, and details are not described herein again.

According to the method provided by the third embodiment of the present invention, when the sub-band CQI and the sub-band PMI need to be reported at the same time, the frequency-domain granularity of the sub-band CQI and the sub-band PMI are respectively reported, so that the frequency of reporting the sub-band CSI is performed. The configuration of the domain granularity is more flexible and can better reflect the actual situation of the channel.

Application Example 4

In the process of aperiodic CSI, if the terminal needs to report the subband CQI and the subband PMI, the eNB pairs

The process of controlling the CSI to report the control specifically includes the following operations:

Step 500: The eNB selects a sub-band CSI corresponding to a combination of a current system bandwidth and a combination of four CXI modes configured for the terminal according to a first correspondence between a CSI reporting mode, a system bandwidth, and a frequency domain granularity set when the sub-band CSI is reported. The frequency domain granularity at the time of reporting, as the sub-band channel shield quantity to be reported for the terminal, indicates the frequency domain granularity when the CQI selected sub-band CQI is reported.

Step 510: The eNB selects a current system bandwidth and a sub-band CSI corresponding to a combination of a CSI mode configured on the CSI according to a first correspondence between a CSI reporting mode, a system bandwidth, and a frequency domain granularity set when the sub-band CSI is reported. The frequency domain granularity at the time of reporting, as the sub-band channel shield quantity to be reported for the terminal, indicates the frequency domain granularity when the sub-band PMI selected by the PMI is reported.

It should be noted that the present invention does not limit the sequence of steps 500 and 510 described above. Step 520: The eNB sends the frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal, and the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band CQI selected by the terminal. The frequency domain granularity when the CQI is reported, and the frequency domain granularity when the subband PMI selected for the subband PMI of the terminal is selected.

For the explanation of the first correspondence in the fourth embodiment, reference may be made to the application embodiment 1, and details are not described herein again.

According to the method provided by the fourth embodiment of the present invention, when the sub-band CQI and the sub-band PMI need to be reported at the same time, the frequency-domain granularity of the sub-band CQI and the sub-band PMI is reported respectively, so that the frequency of reporting the sub-band CSI is reported. The configuration of the domain granularity is more flexible and can better reflect the actual situation of the channel.

Application Example 5

If the terminal only needs to report the sub-band CQI, the process of controlling the CSI reporting by the eNB includes the following operations:

Step 610: The eNB selects a sub-band CSI corresponding to a combination of a current system bandwidth and a combination of four CXI modes configured for the terminal according to a first correspondence between a CSI reporting mode, a system bandwidth, and a frequency domain granularity set when the sub-band CSI is reported. On The frequency domain granularity of the time-scoring, as the sub-band channel shield quantity to be reported for the terminal, indicates the frequency domain granularity when the CQI selected sub-band CQI is reported.

Step 610: The e B transmits the frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal, and the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band CQI selected by the terminal. The frequency domain granularity when the subband CQI is reported.

For the explanation of the first correspondence in the fifth embodiment, reference may be made to the application embodiment 1, and details are not described herein again.

Application Example 6

Step 700: The eNB, according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported, the multiple sub-band csi corresponding to the current system bandwidth and the csi-up combination configured for the terminal. In the frequency domain granularity at the time of reporting, the frequency domain granularity when the sub-band CQI is reported is selected for the sub-band CQI to be reported by the terminal.

Step 710: The eNB sends the frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal, and the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band CQI selected by the terminal. Frequency domain granularity with CQI reporting.

For the explanation of the second correspondence in the sixth embodiment, reference may be made to the application embodiment 1, and details are not described herein again.

The foregoing application embodiments are described in detail by taking a non-periodic CSI reporting process as an example, and the CSI reporting control method provided by the present invention is described in detail. It should be noted that the CSI control method provided by the present invention can also be applied to a periodic CSI reporting process. It can be considered that the CSI reporting control method provided by the present invention can be applied to an application scenario in which the sub-band CSI information needs to be reported.

The second correspondence described in the above various embodiments of the present invention is directed. In the actual application process, according to the actual situation of the channel, a set of frequency domain granularity of 4 C on the CSI and the sub-band CSI corresponding to the system bandwidth may be determined in advance; or the channel condition may occur. A set of frequency domain granularity when a sub-band CSI corresponding to a set of CSI and a system bandwidth is reported is determined in advance. Of course, it is not excluded to predetermine a set of frequency domain granularity on a set of CSIs and a subband CSI corresponding to the system bandwidth according to other selection rules.

Table 5 provides a special second correspondence. Index of system bandwidth, system bandwidth, subband, frequency domain granularity when CS I is reported

0 6 - 7 NA

1 8 - 10 ··, )

2 11 - 26 ··,

3 27 - 63

4 64 - 110 • · 4 ) where ...' ) indicates the set of frequency domain granularity when _n i optional sub-bands are reported by the system bandwidth when the index number of the system bandwidth is i. The value indicates the number of RBs corresponding to the frequency domain granularity when the first j (j=l,..., ni) CSI is reported in ¹ '. When the index number of the system bandwidth is i, if the frequency domain granularity of the CSI is 艮, then the entire system bandwidth contains

The bandwidth of the band is one subband with a bandwidth of N - J. The minimum possible value is 1 and the maximum possible value.

For example, the at least one sub-collection is included, and each sub-set represents a frequency-domain granularity set when the sub-band CSI corresponding to the CSI reporting mode is reported when the system bandwidth index number is i.

The embodiment of the present invention provides a CSI reporting method, which is implemented as shown in FIG. 2, and specifically includes the following operations: Step 800: Receive frequency domain granularity configuration information when the sub-band CSI sent by the network side device is 4艮, The frequency domain granularity configuration information when the sub-band CSI is reported carries the frequency domain granularity of the sub-band CSI reported by the network side device for the sub-band CSI information to be reported by the terminal, and the frequency domain of the sub-band CSI reporting The granularity is selected by the network side device from the current system bandwidth and the frequency domain granularity set on the sub-band CSI corresponding to the combination of the CSI on the CSI configured for the terminal.

The frequency domain granularity set at 4 艮 on the sub-band CSI includes the frequency domain granularity at 4 上 on at least one sub-band CSI. That is to say, a set of CSI reporting modes and system bandwidths may correspond to frequency domain granularity when multiple sub-band CSIs are reported.

Step 810: #^ Calculate the sub-band CSI information according to the frequency domain granularity of the above sub-band CSI.

Step 820: Report the sub-band CSI information at a predetermined reporting time according to the CSI uploading mode configured for the terminal.

According to the foregoing processing procedure, the terminal can calculate the sub-band CSI according to the frequency domain granularity of the sub-band CSI reported by the network side device, because the CSI reporting mode and the system bandwidth can correspond to the frequency domain granularity of the multiple sub-band CSI reporting. The information is further increased by 4艮, which improves the flexibility of the frequency domain granularity configuration when the sub-band CSI is 4艮.

In the process of reporting the CSI by the terminal, in addition to reporting the sub-band CSI information, the broadband CSI information is also reported. corresponding, Broadband CSI information is also calculated. Specifically, the terminal measures and calculates the CSI information in a manner corresponding to the 4艮 mode on the CSI configured by the network side device. The following is an example of how various CSI information is calculated.

For the calculation of wideband PMI: Based on the RI calculated in the current CSI reporting mode, the terminal assumes that the same precoding is used for the whole system bandwidth, and selects a precoding matrix from the codebook to calculate the broadband PML according to the selected precoding matrix.

For the calculation of the subband PMI, the subband PMI is calculated according to the frequency domain granularity of the subband PMI reporting, specifically: based on the RI calculated in the current CSI reporting mode, for each subband, the terminal assumes that the subband is used. The same precoding, and a precoding matrix is selected from the codebook, and the subband PMI is calculated according to the selected precoding matrix. The subband bandwidth is determined by the frequency domain granularity at 4 子 on the subband PMI.

For the calculation of broadband CQI:

If the wideband CQI and the subband PMI are reported at the same time, based on the RI calculated in the current CSI reporting mode, the terminal assumes that each subband uses the ΡΜΙ for the subband on each sub-band, and calculates each case in this case. a wideband CQI of a codeword, wherein a bandwidth of the subband is determined by a frequency domain granularity when the subband is reported;

If the broadband CQI and the broadband ΡΜΙ are reported at the same time, based on the RI calculated in the current CSI reporting mode, the terminal assumes that the whole system bandwidth uniformly uses the broadband 上 reported by the terminal, and calculates the broadband CQI of each codeword in this case.

For the calculation of subband CQI:

If the subband CQI and the subband PMI are simultaneously reported, the terminal calculates the subband CQI for each codeword on each subband based on the RI calculated in the current CSI reporting mode.

Wherein, for any subband for the subband CQI, if all the RBs included in the subband are RBs included in a certain subband PMI, the terminal assumes downlink transmission when calculating the subband CQI of each codeword on the subband. The sub-band PMI described above is used on the sub-band to which the sub-band CQI is directed.

For the sub-band CQI, if there is an intersection between the RB set and the RB set included in the multiple PMI reporting sub-bands, the specific implementation of the foregoing step 810 may be: A sub-band PMI corresponding to the RB subset is used on each of the plurality of RB subsets of the sub-band corresponding to the sub-band CQI, according to the frequency-domain granularity at 4 上 on the sub-band CQI, and the sub-band PMI, The subband CQI is calculated, and the RBs in the RB subset have an intersection with the RBs included in the subband corresponding to one subband PMI. Specifically, when the terminal calculates the sub-band CQI of each codeword on the sub-band, it is assumed that the corresponding sub-band PMI with the intersection of the sub-bands of the sub-band for the sub-band CQI in the downlink transmission is respectively used. . E.g:

It is assumed that the CQI subband (i.e., the subband to which the subband CQI is reported) k contains N RBs, which can be respectively recorded as {R , ..., R3⁄4 _w } according to the frequency from low to high. The RB sets corresponding to the P-weighted PMI sub-bands (that is, the sub-bands to which the sub-band PMI is used) are respectively recorded as

}'···'

Wherein, the label /ow≤, low + PQ -\≥k _N , the sub-band PMI of the above P PMI sub-bands can be respectively recorded as ΡΜΙ _λ , ΡΜΙ ₂ ,...,ΡΜΙ _ρ . Then the _CQI subband _k can be divided into p subsets:

^S \ ^QI = {^1 , · · · 3⁄4w+el } , ^S 2 ^QI = {RBlow+Q " · · RBlow+lQ-l } , · · · , ^S P ^& = {3⁄4 _W+ (Pl)e ' · · · ^ _w }

The CQI calculation on the CQI subband k should assume that ΡΜΙ _λ , ΡΜΙ ₂ ΡΜΙ _Ρ are used on ^QI .., S _P ^CQI , respectively. That is, use ΡΜΙ to calculate the sub-band CQI of S ^Q1 , use the sub-band CQI calculated by ΡΜΙ ₂ , and so on, calculate the sub-band CQI of ²¹ using / 3⁄4, and then, ²¹ , ²¹ ,..., ²¹ The subband CQI is fitted to obtain a subband CQI of the CQI subband k.

If the sub-band CQI and the wideband PMI are simultaneously reported, based on the RI calculated in the current CSI reporting mode, the terminal assumes that each sub-band uniformly uses the broadband PMI on the terminal, and calculates each sub-band in this case. The subband of the codeword is CQI.

The embodiment of the invention further provides a CSI control device, and its implementation structure is shown in FIG. 3, and the specific implementation structure is as follows:

The frequency domain granularity configuration module 3001 is configured to select a sub-band CSI information to be reported by the terminal in a frequency domain granularity set when the sub-band CSI is reported from the combination of the current system bandwidth and the CSI reporting mode configured for the terminal. The frequency domain granularity at 4 C on the sub-band CSI.

The frequency domain granularity set when the sub-band CSI is reported includes the frequency domain granularity when the at least one sub-band CSI is reported. That is to say, a set of CSI reporting modes and system bandwidths can correspond to frequency domain granularity when multiple sub-band CSIs are reported.

The configuration information sending module 3002 is configured to send the frequency domain granularity configuration information when the sub-band CSI is reported to the terminal, and the frequency domain granularity configuration module 3001 in the frequency domain granularity configuration information of the sub-band CSI reporting is the terminal The frequency domain granularity when the sub-band CSI selected by the sub-band CSI information to be reported is reported.

The CSI reporting control device provided by the embodiment of the present invention may be e B.

Since a set of CSI 4 艮 mode and system bandwidth can correspond to frequency domain granularity at 4 多个 on multiple sub-band CSIs, a network-side device (eg, e B ) can select a frequency domain particle at 4 艮 on a sub-band CSI. Degree, and the selected frequency band granularity of the sub-band CSI is transmitted to the terminal, which improves the flexibility of the frequency domain granularity configuration when the sub-band CSI is on the SI.

For a specific implementation manner of configuring the sub-band CSI by the CSI reporting control device provided by the embodiment of the present invention, reference may be made to the description of the foregoing method, and details are not described herein again.

The embodiment of the invention further provides a CSI reporting device, and the implementation structure thereof is as shown in FIG. 4, and the specific implementation structure is as follows:

The configuration information receiving module 4001 is configured to receive frequency domain granularity configuration information when the sub-band CSI is reported by the network side device, where the frequency domain granularity configuration information of the sub-band CSI carries the network side device as a terminal. The frequency domain granularity of the sub-band CSI reported by the sub-band CSI information of the sub-band CSI information is required. The frequency-domain granularity of the sub-band CSI reporting is determined by the network side device from the current system bandwidth and the csi configured for the terminal. The combination of the Mo-type corresponds to the sub-band csi on the 4th Selected in the frequency domain granularity set.

The CSI information calculation module 4002 is configured to calculate sub-band CSI information according to the frequency domain granularity at 4 上述 on the sub-band CSI.

The CSI reporting module 4003 is configured to report the sub-band CSI information at a predetermined reporting time according to the CSI reporting mode configured for the terminal.

The CSI reporting device provided by the embodiment of the present invention may be a terminal.

The sub-band CSI information can be calculated according to the frequency-domain granularity of the sub-band CSI reported by the network-side device, because the 4-band mode and the system bandwidth of the CSI can correspond to the frequency-domain granularity of the multi-band CSI. And reported, improve the flexibility of the frequency domain granularity configuration when the sub-band CSI is 4艮.

If the frequency domain granularity configuration information in the above-mentioned sub-band CSI is in the frequency domain granularity of the sub-band CQI selected by the sub-band CQI of the terminal, the sum is The CSI information calculation module 4002 includes a subband ΡΜΙ calculation submodule and a subband CQI calculation submodule, where the terminal needs to select the subband ΡΜΙ selected frequency band granularity.

The subband ΡΜΙ calculation submodule is configured to calculate the subband 根据 according to the frequency domain granularity when the subband ΡΜΙ is reported.

The sub-band CQI calculation sub-module is configured to: if the RB included in the sub-band corresponding to the sub-band CQI and the RB included in the sub-band corresponding to the multiple sub-band 存在 have an intersection, it is assumed that the sub-band corresponding to the sub-band CQI in the downlink transmission The sub-bands corresponding to the RB subsets are respectively used on the plurality of RB subsets, and the sub-band CQIs are calculated according to the frequency-domain granularity of the sub-band CQI reporting, and the RB subsets. The RBs included in the subband corresponding to one subband have an intersection.

For a CSI reporting device, the specific working mode of each module may be referred to the description of the foregoing method, and details are not described herein again.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. A processor that can provide these computer program instructions to a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device To generate a machine that causes instructions executed by a processor of a computer or other programmable data processing device to generate functions for implementing a process in a flow or a flow and/or a block diagram in a block or blocks. s installation.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

1. A channel state information CSI control method, which is characterized in that:

Selecting the sub-band CSI for the sub-band CSI information to be reported by the terminal from the current system bandwidth and the frequency-domain granularity set on the sub-band csi corresponding to the csi-up combination configured for the terminal a frequency domain granularity, where the frequency domain granularity set when the sub-band CSI is reported includes a frequency domain granularity when at least one sub-band CSI is reported;

The frequency domain granularity configuration information when the sub-band CSI is transmitted to the terminal is transmitted to the terminal, and the frequency-domain granularity configuration information of the sub-band CSI is used to carry the sub-band CSI information to be reported by the terminal. The frequency domain granularity of the sub-band CSI reporting.

The method according to claim 1, wherein in the frequency domain granularity set when the sub-band CSI corresponding to the combination of the current system bandwidth and the CSI reporting mode configured for the terminal is reported, the terminal needs to be reported. Subband

The CSI information selects the frequency domain granularity of the sub-band CSI at 4艮, including:

According to the actual situation of the channel, in the frequency domain granularity set when the sub-band CSI is reported from the combination of the current system bandwidth and the CSI reporting mode configured for the terminal, the sub-band CSI is selected for the sub-band CSI information to be reported by the terminal. Frequency domain granularity when reported.

3. The method according to claim 2, wherein the actual situation of the channel comprises any one or more of the following combinations:

The frequency selectivity of the channel, the capacity of the feedback channel for reporting the sub-band CSI information, and the path loss of the channel uplink power.

The method according to any one of claims 1 to 3, wherein the CSI information to be reported by the terminal comprises: a subband channel shield quantity indication CQI and a subband precoding matrix indication PMI;

Selecting a sub-band CSI for the sub-band CSI information to be reported by the terminal from the current system bandwidth and the frequency-domain granularity set on the sub-band csi corresponding to the csi-up combination configured for the terminal The frequency domain granularity includes: according to the first correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set at the time of the sub-band CSI, the combination of the system bandwidth and the CSI on the terminal configured for the terminal The frequency domain granularity of the sub-band CQI selected for the sub-band CQI to be reported by the terminal is frequency domain granularity when the sub-band CQI is selected for the sub-band CQI to be reported by the terminal;

And according to the second correspondence between the csi on the system, the system bandwidth and the frequency domain granularity set on the sub-band csi, the plurality of sub-bands corresponding to the current system bandwidth and the csi-up combination configured for the terminal In the frequency domain granularity of the last 4 ,, the frequency domain granularity when the sub-band PMI is reported for the sub-band PMI to be reported by the terminal;

The first correspondence includes:

When the CSI reporting mode is based on the CSI reporting mode 1-2 or 3-1 of the physical uplink shared channel PUSCH: if the system bandwidth is 6-7 resource block RBs, the frequency domain granularity when the corresponding sub-band CSI is reported is the system bandwidth. All RBs included; if the system bandwidth is 8-26 RBs, the frequency domain granularity of 4 艮 on the corresponding sub-band CSI is 4 RBs; The system bandwidth is 27-110 RBs, and the frequency domain granularity of the corresponding sub-band CSI reporting is 6 RBs;

When the CSI is the PUSCH-based CSI reporting mode 2-2: If the system bandwidth is 6-7 RBs, the corresponding sub-band CSI reporting frequency domain granularity is all RBs included in the system bandwidth; if the system bandwidth is 8-26 RBs, the frequency domain granularity of the corresponding subband CSI is 2 RBs; if the system bandwidth is 27-63 RBs, the frequency domain granularity of 4 艮 on the corresponding subband CSI 3 RBs; if the system bandwidth is 64-110 RBs, the frequency domain granularity at 4 上 on the corresponding sub-band CSI is 4 RBs;

In the second correspondence, the frequency domain granularity set when the sub-band CSI is reported includes the frequency domain granularity when multiple sub-band CSIs are reported.

The method according to any one of claims 1 to 3, wherein the CSI information to be reported by the terminal comprises: a subband CQI and a subband ΡΜΙ;

Selecting a sub-band CSI for the sub-band CSI information to be reported by the terminal from the current system bandwidth and the frequency-domain granularity set on the sub-band csi corresponding to the csi-up combination configured for the terminal The frequency domain granularity includes: according to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set at the time of the sub-band CSI, the corresponding combination of the current system bandwidth and the csi on the terminal configuration In the frequency domain granularity of the plurality of sub-bands on the csi, the frequency-domain granularity when the sub-band CSI is reported for the sub-band CQI to be reported by the terminal;

And selecting a sub-band CSI corresponding to the combination of the current system bandwidth and the combination of the 4 艮 mode on the CSI configured for the terminal according to the first correspondence between the csi on the system, the system bandwidth, and the frequency domain granularity set on the sub-band csi. The frequency domain granularity of the upper λ, the frequency domain granularity when the sub-band selected for the sub-band of the terminal is 4 ΡΜΙ;

The first correspondence includes:

When the CSI reporting mode is CSI reporting mode 1-2 or 3-1 based on the physical uplink shared channel PUSCH: if the system bandwidth is 6-7 RBs, the frequency domain granularity of the corresponding sub-band CSI reporting is included in the system bandwidth. All RBs; if the system bandwidth is 8-26 RBs, the frequency domain granularity of 4 艮 on the corresponding sub-band CSI is 4 RBs; if the system bandwidth is 27-110 RBs, the corresponding sub-band CSI is reported The frequency domain granularity is 6 RBs;

Frequency domain from the current system bandwidth and the sub-band CSI corresponding to the combination of CSI configured for the terminal In the granularity set, the frequency domain granularity when the sub-band CSI is reported for the sub-band CSI information to be reported by the terminal, includes: a frequency domain granularity set according to a CSI reporting mode, a system bandwidth, and a sub-band CSI. The second correspondence relationship, the sub-band CQI selector to be reported by the terminal in the frequency domain granularity of the current sub-band csi corresponding to the current system bandwidth and the csi-up combination configured for the terminal Frequency domain granularity with CQI reporting;

And according to the second correspondence between the CSI, the system bandwidth, and the frequency domain granularity set on the sub-band CSI, the plurality of sub-bands corresponding to the current system bandwidth and the csi-up combination configured for the terminal In the frequency domain granularity of the last 4 ,, the frequency domain granularity when the sub-band PMI is reported for the sub-band PMI to be reported by the terminal;

The method according to any one of claims 1 to 3, wherein the CSI information to be reported by the terminal includes: a sub-band CQI and a sub-band PMI, and the CSI is configured from the current system bandwidth and the terminal. In the frequency domain granularity set of the sub-band CSI corresponding to the sub-band CSI, the frequency-domain granularity when the sub-band CSI is selected for the sub-band CSI information of the terminal is selected, including:

According to the first correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set on the sub-band CSI, the current system bandwidth and the sub-band CSI corresponding to the combination of the CSI on the CSI are selected. The frequency domain granularity of the time domain as the sub-band CQI selected for the sub-band CQI to be reported by the terminal;

The first correspondence includes:

When the CSI is the PUSCH-based CSI reporting mode 2-2: If the system bandwidth is 6-7 RBs, the corresponding sub-band CSI reporting frequency domain granularity is all RBs included in the system bandwidth; if the system bandwidth is 8-26 RBs, the frequency domain granularity of the corresponding subband CSI is 2 RBs; if the system bandwidth is 27-63 RBs, the frequency domain granularity of 4 艮 on the corresponding subband CSI It is 3 RBs; if the system bandwidth is 64-110 RBs, the frequency domain granularity at 4 上 on the corresponding sub-band CSI is 4 RBs.

The method according to any one of claims 1 to 3, wherein the CSI information to be reported by the terminal comprises: a subband CQI;

Selecting a sub-band CSI for the sub-band CSI information to be reported by the terminal from the current system bandwidth and the frequency-domain granularity set on the sub-band csi corresponding to the csi-up combination configured for the terminal Frequency domain granularity, including: According to the first correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set on the sub-band CSI, the current system bandwidth and the sub-band CSI corresponding to the combination of the CSI on the CSI are selected. Frequency domain granularity at the time of the frequency band granularity of the sub-band CQI selected by the CQI as the sub-band channel shield quantity to be reported for the terminal; or

The second correspondence between the 4 艮 mode on the CSI, the system bandwidth, and the frequency domain granularity set at 4 子 on the sub-band CSI, the multiple sub-bands corresponding to the combination of the current system bandwidth and the csi on the terminal configuration In the frequency domain granularity at 4 c on csi, the frequency domain granularity when the sub-band CQI is reported for the sub-band CQI to be reported by the terminal;

The first correspondence includes:

A channel state information CSI reporting method, which is characterized in that:

According to the CSI on the terminal configured for the terminal, the sub-band CSI information is extracted at a predetermined time.

The method according to claim 9, wherein the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band channel shield quantity indication CQI selected by the network side device to be reported by the terminal. The frequency domain granularity when the sub-band CQI is reported, and the sub-band precoding matrix that is reported by the terminal, indicates the frequency domain granularity when the selected sub-band is reported; the frequency domain granularity when reporting the sub-band CSI And calculating the sub-band CSI information, specifically: calculating the sub-band according to the frequency domain granularity of the sub-band reporting time; If there is an intersection between the resource block RB included in the subband corresponding to the subband CQI and the RB included in the subband corresponding to the multiple subband PMI, it is assumed that multiple RB subsets of the subband corresponding to the subband CQI in the downlink transmission The sub-band PMI corresponding to the RB subset is used respectively, and the sub-band CQI is calculated according to the frequency-domain granularity of the sub-band CQI reporting, and the sub-band PMI, and the RB and one sub-group of the RB subset The RBs included in the subbands corresponding to the PMI have an intersection.

11. A channel state information CSI on a control device, comprising:

The frequency domain granularity configuration module is configured to: in the frequency domain granularity set on the sub-band CSI corresponding to the combination of the current system bandwidth and the CSI reporting mode configured for the terminal, the terminal needs to be 4艮The CSI information is used to select the frequency domain granularity at 4 子 on the sub-band CSI, and the frequency domain granularity set at 4 艮 on the sub-band CSI includes at least one sub-band CSI on the frequency domain granularity;

a configuration information sending module, configured to send, to the terminal, frequency domain granularity configuration information when the sub-band CSI is 4艮, where the frequency domain granularity configuration information of the sub-band CSI is required to be carried in the terminal The frequency domain granularity of the sub-band CSI selected by the sub-band CSI information of the upper 4 。 sub-band.

The apparatus according to claim 11, wherein the frequency domain granularity configuration module is specifically configured to: according to a actual situation of the channel, a sub-corresponding sub-group from a current system bandwidth and a CSI reporting mode configured for the terminal In the frequency domain granularity set with CSI reporting, the frequency domain granularity when the sub-band CSI is reported is selected for the sub-band CSI information that the terminal needs to report.

13. The apparatus according to claim 12, wherein the actual situation of the channel comprises any one or more of the following combinations:

The device according to any one of claims 11 to 13, wherein the CSI information to be reported by the terminal includes: a subband channel shield quantity indication CQI and a subband precoding matrix indicator ΡΜΙ, the frequency domain granule The degree configuration module is specifically configured to: according to the first correspondence between the 4艮 mode on the CSI, the system bandwidth, and the frequency domain granularity set on the sub-band CSI, select the current system bandwidth and the CSI configured for the terminal. The frequency domain granularity at the time of the sub-band CSI corresponding to the combination of the 艮 mode is used as the frequency domain granularity of the sub-band CQI selected for the sub-band CQI to be reported by the terminal; and according to the CSI reporting mode and system The second correspondence between the bandwidth and the frequency domain granularity set when the sub-band CSI is reported, and the frequency domain granularity at the time of the multiple sub-band CSI corresponding to the combination of the current system bandwidth and the C艮 on the CSI configured for the terminal In the middle of the sub-band, the sub-band of 4 艮 is selected for the frequency domain granularity when the sub-band is 4 ;;

The first correspondence includes:

When the CSI reporting mode is based on the CSI reporting mode 1-2 or 3-1 of the physical uplink shared channel PUSCH: if the system bandwidth is 6-7 resource blocks RB, the frequency domain granularity when the corresponding sub-band CSI is reported is the system bandwidth. All the RBs included; if the system bandwidth is 8-26 RBs, the frequency domain granularity of the corresponding sub-band CSI is 4 RBs; if the system bandwidth is 27-110 RBs, the corresponding sub-band CSI is reported. The frequency domain granularity is 6 RBs; When the CSI is in the CSCH reporting mode 2-2 based on the PUSCH: If the system bandwidth is 6-7 RBs, the frequency domain granularity of the corresponding sub-band CSI reporting is all RBs included in the system bandwidth; The bandwidth is 8-26 RBs, and the frequency domain granularity of the corresponding subband CSI is 2 RBs. If the system bandwidth is 27-63 RBs, the frequency domain of the corresponding subband CSI is 4 艮. The granularity is 3 RBs; if the system bandwidth is 64-110 RBs, the frequency domain granularity at 4 上 on the corresponding sub-band CSI is 4 RBs;

The device according to any one of claims 11 to 13, wherein the CSI information to be reported by the terminal includes: a subband CQI and a subband, and the frequency domain granularity configuration module is specifically used according to The second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported, from the current system bandwidth and the multiple sub-band CSI corresponding to the combination of the four-mode CSI configured for the terminal In the frequency domain granularity, the frequency domain granularity when the sub-band CQI is reported for the sub-band CQI to be reported by the terminal; and according to the CSI reporting mode, the system bandwidth, and the frequency domain granularity at 4 子 on the sub-band CSI The first corresponding relationship of the set, the frequency domain granularity of the sub-band CSI reporting corresponding to the combination of the current system bandwidth and the CSI reporting mode configured for the terminal is selected as the sub-band selected for the sub-band to be reported by the terminal. Frequency domain granularity at the time of reporting;

The first correspondence includes:

When the CSI reporting mode is based on the CSI reporting mode 1-2 or 3-1 of the physical uplink shared channel PUSCH: if the system bandwidth is 6-7 RBs, the frequency domain granularity of the corresponding sub-band CSI reporting is included in the system bandwidth. All RBs; if the system bandwidth is 8-26 RBs, the frequency domain granularity of 4 艮 on the corresponding sub-band CSI is 4 RBs; if the system bandwidth is 27-110 RBs, the corresponding sub-band CSI is 4艮The frequency domain granularity is 6 RBs;

The device according to any one of claims 11 to 13, wherein the CSI information to be reported by the terminal includes: a subband CQI and a subband, and the frequency domain granularity configuration module is specifically used according to The second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported, from the current system bandwidth and the multiple sub-band CSI corresponding to the combination of the four-mode CSI configured for the terminal In the frequency domain granularity, the frequency domain granularity when the sub-band CQI is reported for the sub-band CQI to be reported by the terminal; and according to the CSI reporting mode, the system bandwidth, and the frequency domain granularity at 4 子 on the sub-band CSI The second correspondence of the set, from the current system bandwidth and the CSI configured for the terminal • In the frequency domain granularity of 4艮 on the multiple sub-bands CSI corresponding to the combination of Μ Μ 式, the sub-band 需 of 4 艮 is selected for the terminal, and the frequency-domain granularity when the sub-band is reported is selected;

The apparatus according to any one of claims 11 to 13, wherein the CSI information to be reported by the terminal includes: a subband CQI and a subband, and the frequency domain granularity configuration module is specifically used according to The first correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set at 4 子 on the sub-band CSI, and selecting the current system bandwidth and the sub-band CSI corresponding to the combination of the 4 艮 mode configured for the terminal. The frequency domain granularity of the time-frequency granularity as the sub-band CQI selected for the sub-band CQI to be reported by the terminal; and according to the CSI reporting mode, the system bandwidth, and the frequency domain granularity when the sub-band CSI is reported The first corresponding relationship of the set, selecting the current system bandwidth and the frequency domain granularity at the time of the sub-band CSI corresponding to the combination of the four modes on the CSI configured for the terminal, as a sub-band for the terminal频The selected sub-band has a frequency domain granularity of 4艮;

The first correspondence includes:

The device according to any one of claims 11 to 13, wherein the CSI information to be reported by the terminal includes: a sub-band CQI, where the frequency domain granularity configuration module is specifically configured to:

According to the first correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set when the sub-band CSI is reported, the current system bandwidth and the sub-band CSI corresponding to the combination of the CSI on the CSI are selected. Frequency domain granularity, as the sub-band channel shield quantity to be reported by the terminal, indicates the frequency domain granularity when the CQI selected sub-band CQI is reported; or

According to the second correspondence between the CSI reporting mode, the system bandwidth, and the frequency domain granularity set at the time of the sub-band CSI, the multiple sub-band CSI corresponding to the combination of the current system bandwidth and the CSI-based configuration configured for the terminal 4 In the frequency domain granularity of the time zone, the frequency domain granularity when the subband CQI is reported for the subband CQI to be reported by the terminal;

The first correspondence includes:

When the CSI reporting mode is CSI reporting mode 1-2 or 3-1 based on the physical uplink shared channel PUSCH: The system bandwidth is 6-7 RBs, and the frequency domain granularity of the corresponding sub-band CSI reporting is all RBs included in the system bandwidth; if the system bandwidth is 8-26 RBs, the corresponding sub-band CSI is 4 的. The domain granularity is 4 RBs; if the system bandwidth is 27-110 RBs, the corresponding sub-band CSI reporting frequency domain granularity is 6 RBs;

A channel state information CSI reporting device, comprising:

The device according to claim 19, wherein the frequency domain granularity configuration information when the sub-band CSI is reported carries the sub-band channel shield indication that the network side device needs to be on the terminal The frequency domain granularity when the sub-band CQI is selected by the CQI, and the frequency-domain granularity when the sub-band precoding matrix that is to be reported by the terminal indicates the sub-band that is selected, and the CSI information calculation module includes:

a subband ΡΜΙ calculation submodule, configured to calculate a subband 根据 according to a frequency domain granularity of the subband ΡΜΙ reporting time; a subband CQI calculation submodule, configured to use a resource block included in a subband corresponding to the subband CQI The RBs of the RBs corresponding to the multiple sub-bands have an intersection, and it is assumed that the sub-bands corresponding to the RB subsets are respectively used on the multiple RB subsets of the sub-bands corresponding to the sub-band CQI in the downlink transmission. Calculating a sub-band CQI according to the frequency domain granularity at 4 上 on the sub-band CQI, and the sub-band CQI, where the RBs in the RB subset and the sub-bands corresponding to one sub-band 存在 exist Intersection.