WO2017050077A1

WO2017050077A1 - Channel information measurement pilot resources subset selection method, terminal and base station

Info

Publication number: WO2017050077A1
Application number: PCT/CN2016/096238
Authority: WO
Inventors: 陈艺戬; 李儒岳; 肖华华; 鲁照华; 蔡剑兴; 李永; 吴昊
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-25
Filing date: 2016-08-22
Publication date: 2017-03-30
Also published as: CN106559113B; CN106559113A

Abstract

A channel information measurement pilot resources subset selection method, a terminal and a base station. The method comprises: according to a feedback mode of channel information feedback on a physical uplink control channel and/or a feedback type of channel information on the physical uplink control channel and/or channel state information reference signal (CSI-RS) measurement resources subset selection signalling and/or a rank indicator (RI) value, a terminal determines a CSI-RS resources subset from within a CSI-RS configured by a base station for a CSI process; on the basis of the CSI-RS resources subset, the terminal performs measurement and channel information quantisation, and performs feedback on the physical uplink control channel via the feedback type included in the feedback mode.

Description

Subset selection method, terminal and base station for channel information measurement pilot resources

Technical field

This document relates to, but is not limited to, the field of mobile communications, and in particular, to a method, a terminal and a base station for selecting a subset of channel information measurement pilot resources.

Background technique

The data transmission performance of a multi-antenna system depends mainly on the measurement and feedback of channel information. Therefore, the measurement and feedback of channel information is the core content of multi-antenna technology; how to ensure the accuracy, cost and robustness of channel measurement and channel information feedback has become an important issue. In the early version of Long Term Evolution (LTE), such as Release 8 (Rel-8), the terminal usually used Common Reference Signal (CRS) for channel estimation and measurement. The reference used in this version. The signal RS is a non-precoded RS, and the RS is generally transmitted by using a base station antenna and an antenna port to be mapped one by one. In the Rel-10 release, a new RS, the channel state information reference signal CSI-RS, is introduced in order to enable the terminal to estimate and feed back a larger bandwidth of Channel State Information (CSI) for a large number of antenna ports. Unlike the RS in the earlier version, which is used for both channel estimation and signal demodulation, the newly introduced CSI-RS is a reference signal transmitted by the base station and used for channel measurement. The terminal performs channel based on the pilot symbols transmitted by the base station. It is estimated that the information of the channel matrix H of different transceiver antennas at different time-frequency resource locations is obtained, and then CSI quantization and feedback can be performed based on the channel matrix H.

For content related to CSI feedback in LTE, 3GPP mainly defines channel quality indication (CQI), Precoding Matrix Indicator (PMI), and Rank Indicator (RI). CQI is an indicator to measure the quality of downlink channels. In the 36-213 protocol, CQI is represented by an integer value of 0 to 15, which respectively represent different CQI levels, and different CQIs correspond to respective modulation modes and coding rate (MCS). The RI is used to describe the number of spatially independent channels, corresponding to the rank of the channel response matrix. In the open-loop spatial multiplexing and closed-loop spatial multiplexing mode, the UE needs to feed back RI information, and other modes do not need to feed back RI information. The rank of the channel matrix corresponds to the number of layers. PMI feedback is the best precoding information, based on the index Feedback indicating the codeword of the agreed codebook that best matches the characteristics of the current channel. CSI quantization and feedback can be performed based on the channel matrix H.

Currently, in the physical uplink control channel (PUCCH) periodic CSI feedback, since the payload of each feedback type (Report Type) of the PUCCH is small, it is close to saturation, and is configured in the CSI process. The number of CSI-RS pilots is large. The increase of the beam index Beam Index selection information will have a significant impact on the uplink performance of various different types of report types. Although the CSI feedback accuracy is guaranteed, it cannot be guaranteed. The low error rate requirement corresponding to the report type (Report Type) ultimately leads to sufficient CSI accuracy but the base station often fails to decode correctly. Therefore, a better method is needed to compromise the CSI accuracy and the error rate performance of the Report Type.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The method for selecting a subset of channel information measurement pilot resources, the terminal, and the base station provided by the embodiments of the present invention can achieve a compromise between CSI accuracy and feedback type error rate performance, so that the CSI accuracy and the feedback type error rate performance are balanced. .

The embodiments of the present invention provide the following technical solutions:

A method for selecting a subset of channel information measurement pilot resources, comprising:

The terminal measures the resource subset selection signaling and/or the rank indicator according to the feedback mode of the channel information feedback on the physical uplink control channel and/or the feedback type of the channel information on the physical uplink control channel and/or the channel state information reference signal CSI-RS. The value of the RI is determined by the base station to determine a CSI-RS resource subset in the CSI-RS for the CSI process configuration;

The terminal performs measurement and channel information quantization based on the CSI-RS resource subset and performs feedback on the physical uplink control channel by using the feedback type included in the feedback mode.

The subset of CSI-RS resources is a Yc set in an Xc set CSI-RS configuration; and/or,

The CSI-RS resource subset is Yr resource sets in Xr CSI-RS resource set configurations; and/or,

The CSI-RS resource subset is Yp CSI-RS port groups in Xp CSI-RS port groups;

Among them, Xc, Yc, Xr, Yr, Xp and Yp are all positive integers.

The terminal determines the value of the Yc and/or the value of Yr and/or the value of Yp according to the feedback mode and/or the feedback type.

The terminal determines an index of a Yc-set CSI-RS configuration according to the feedback mode and/or a feedback type, and/or a Set index included in a Yr CSI-RS resource group Resource Set, and/or Yr CSI- Group index included in the RS port group port group.

The measurement resource subset selection signaling is bitmap bitmap signaling, and each bit indicates selection information of one or more configurations and/or resource groups and/or port groups.

The base station separately configures CSI-RS measurement resource subset selection signaling for different feedback modes and/or feedback types.

The method further includes: the terminal determining a subset selection method of the pilot resources according to the feedback category configuration signaling.

The method further includes: determining, by the terminal, a subset selection method of the pilot resource according to whether the PMI feedback enables configuration signaling.

The method further includes: determining, by the terminal, a subset selection method of pilot resources according to a dimension of feedback of the PMI.

A method for configuring a subset of channel information measurement pilot resources, including:

The base station sends pilot resource subset selection signaling to the terminal for periodic CSI feedback, where the pilot resource subset selection signaling is used by the terminal to determine a pilot resource subset when CSI measurement and feedback.

The method further includes determining, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the feedback mode.

The method further includes determining, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the feedback type.

The method further includes: determining, by the base station, the pilot resource subset selection signaling permission according to a feedback category The configured subset size.

The method further includes the base station determining, according to the precoding matrix indicator PMI feedback enabled configuration signaling, the subset size of the pilot resource subset selection signaling allowed configuration.

The method further includes determining, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to a dimension of the feedback of the PMI.

The method further includes determining, by the base station, a subset size of the pilot resource subset selection signaling allowed configuration according to the RI value.

The method further includes: configuring, by the base station, pilot resource subset selection signaling for periodic CSI feedback for the P process processes, where P is an integer greater than 1.

The method further includes: configuring, by the base station, a pilot resource subset selection signaling when a periodic CSI feedback is configured for the P set of CSI-RSs, where P is an integer greater than 1.

The base station further includes a pilot resource subset selection signaling when periodic CSI feedback is configured for the feedback classes Class A and Class B, respectively.

The method further includes: the base station configuring, for the R RI values, a pilot resource subset selection signaling when the periodic CSI feedback is respectively configured, where R is an integer greater than 1.

The method further includes: configuring, by the base station, pilot resource subset selection signaling when periodic CSI feedback is respectively configured for PMI enable and disable.

The method further includes: configuring, by the base station, pilot resource subset selection signaling when periodic CSI feedback is respectively configured for RI enable and disable.

The method further includes: configuring, by the base station, a pilot resource subset selection signaling during periodic CSI feedback for the feedback of the Q PMIs, where Q is an integer greater than 1.

A terminal comprising:

The first determining module is configured to: according to a feedback mode of channel information feedback on the physical uplink control channel and/or a feedback type of channel information on the physical uplink control channel and/or a channel state information reference signal CSI-RS measurement resource subset selection signaling And/or the value of the rank indicator RI, the base station determines a CSI-RS resource subset in the CSI-RS configuration for the CSI process;

a processing module configured to perform measurement and channel information based on the subset of CSI-RS resources Chemical

The feedback module is configured to perform feedback on the physical uplink control channel by using the feedback type included in the feedback mode.

The CSI-RS resource subset is a Yc set in an Xc set CSI-RS configuration; and/or,

The CSI-RS resource subset is Yp CSI-RS port groups in Xp CSI-RS port groups;

Among them, Xc, Yc, Xr, Yr, Xp and Yp are all positive integers.

The first determining module is configured to determine a value of the Yc and/or a value of Yr and/or a value of Yp according to the feedback mode and/or the feedback type.

The first determining module is configured to determine an index of a Yc-set CSI-RS configuration according to the feedback mode and/or a feedback type, and/or a Set index included in a Yr CSI-RS resource group Resource Set, and / or Yr group index included in the CSI-RS port group port group.

The first determining module is further configured to determine a subset selection method of the pilot resources according to the feedback category configuration signaling.

The first determining module is further configured to determine a subset selection method of the pilot resources according to whether the PMI feedback enables configuration signaling.

The first determining module is further configured to determine a subset selection method of the pilot resources according to the dimension of the feedback of the PMI.

A base station comprising:

a sending module, configured to send pilot resource subset selection signaling to the terminal for periodic CSI feedback, where the pilot resource subset selection signaling is used by the terminal to determine CSI measurement and feedback A subset of pilot resources.

The base station further includes:

And a second determining module, configured to determine, according to the feedback mode, the subset size of the pilot resource subset selection signaling allowed configuration.

The base station further includes:

And a second determining module, configured to determine, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the feedback type.

The base station further includes:

And a second determining module, configured to determine, according to the feedback category, the subset size of the pilot resource subset selection signaling allowed configuration.

The base station further includes:

And a second determining module, configured to determine, according to the precoding matrix indicator PMI feedback enabled configuration signaling, the subset size of the pilot resource subset selection signaling allowed configuration.

The base station further includes:

And a second determining module, configured to determine, according to a dimension of the feedback of the PMI, the subset size of the pilot resource subset selection signaling allowed configuration.

The base station further includes:

The second determining module is configured to determine, according to the RI value, the subset size of the pilot resource subset selection signaling allowed to be configured according to the RI value.

The base station further includes:

The configuration module is configured to separately configure pilot resource subset selection signaling when the periodic CSI feedback is configured for the P process processes, where P is an integer greater than 1.

The base station further includes:

The configuration module is configured to configure pilot resource subset selection signaling when the periodic CSI feedback is configured for the P-set CSI-RS, where P is an integer greater than 1.

The base station further includes:

The configuration module is configured to configure pilot resource subset selection signaling when periodic CSI feedback is configured for the feedback classes Class A and Class B, respectively.

The base station further includes:

The configuration module is configured to configure pilot resource subset selection signaling when the periodic CSI feedback is respectively configured for the R RI values, where R is an integer greater than 1.

The base station further includes:

The configuration module is configured to configure pilot resource subset selection signaling when periodic CSI feedback is respectively configured for PMI enable and disable.

The base station further includes:

The configuration module is configured to configure pilot resource subset selection signaling when periodic CSI feedback is configured for the RI enabled and disabled states, respectively.

The base station further includes:

The configuration module is configured to separately configure pilot resource subset selection signaling when the periodic CSI feedback is used for the feedback of the Q PMIs, where Q is an integer greater than 1.

A method for determining a subset of channel information measurement pilot resources, comprising:

The terminal selects a subset of resources from the channel information measured by the base station, and the terminal feeds back the resource subset by using the first type of physical uplink control signaling;

The terminal notifies the base station that the CSI feedback in the agreed time range is measured by the resource subset of the feedback channel information measurement pilot by using the second type of physical uplink control channel signaling.

The agreed time range size is a feedback period of the feedback type in which the feedback signaling is located.

The notification signaling and the rank feedback information of the channel are fed back in the same feedback type.

The notification signaling and the selection of the subset of resources indicate that the signaling is fed back in the same feedback type.

A terminal comprising:

a processing module, configured to: select a subset of resources from the channel information measurement pilot resources configured by the base station; feed back the resource subset by using the first type of physical uplink control signaling; and pass the second type of physical uplink The control channel signaling informs the base station that the CSI feedback within the agreed time range is measured using the resource subset of the feedback channel information measurement pilot.

The embodiment provided by the present invention, according to the feedback mode of the channel information feedback on the physical uplink control channel and/or the feedback type of the channel information on the physical uplink control channel and/or the channel state information reference signal CSI-RS measurement resource subset selection signaling And/or the value of the rank indicator RI, determining, by the base station, a CSI-RS resource subset in the CSI-RS configuration CSI-RS, performing measurement and channel information quantization based on the CSI-RS resource subset, and passing the feedback The feedback type included in the mode is fed back on the physical uplink control channel, and the error rate performance of the CSI precision and the feedback type is compromised, so that the CSI precision and the feedback type bit error rate performance are balanced.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flowchart of a method for selecting a subset of channel information measurement pilot resources according to an embodiment of the present invention;

2 is a schematic diagram of a method for a terminal to select a CSI-RS resource subset according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a correspondence between a process and a feedback mode according to an embodiment of the present disclosure;

4 is a schematic diagram of a method for configuring a subset of channel information measurement pilot resources according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a corresponding relationship between a measurement pilot subset and a periodic CSI feedback mode according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a correspondence between a feedback type configuration and a measurement pilot resource selection subset according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a correspondence between a RI and a selected subset of measurement pilot resources according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a correspondence between a feedback category and a selected subset of measurement pilot resources according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a correspondence between a CSI Process and a measurement pilot subset according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of whether a PMI is enabled to determine a measurement pilot subset selection signaling according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of determining signaling of a subset of measurement pilots according to whether a PMI is enabled according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of whether an RI enables determining a measurement pilot subset selection signaling according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of determining signaling of a subset of measurement pilots according to whether RI is enabled according to an RI according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of a correspondence between a feedback dimension size and a selected subset of measurement pilot resources according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of a base station transmitting a pilot resource subset selection signaling to a terminal according to an embodiment of the present disclosure;

FIG. 16 is a schematic diagram of a correspondence between a periodic CSI feedback mode and a subset of a configurable pilot resource according to an embodiment of the present disclosure;

FIG. 17 is a schematic diagram of a correspondence between a feedback category and a subset of a configurable pilot resource according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of a correspondence between PMI feedback enable and a subset of configurable pilot resources according to an embodiment of the present invention;

FIG. 19 is a schematic diagram of correspondence between RI feedback enable and the size of a subset of configurable pilot resources according to an embodiment of the present disclosure;

FIG. 20 is a schematic diagram of a feedback of a PMI and a subset of the available pilot resources according to an embodiment of the present invention. a schematic diagram of a small correspondence;

FIG. 21 is a schematic diagram of a correspondence between a value of a RI and a subset of a configurable pilot resource according to an embodiment of the present invention;

FIG. 22 is a schematic diagram of a pilot resource subset selection signaling when a base station configures periodic CSI feedback for N processes according to an embodiment of the present disclosure;

FIG. 23 is a schematic diagram of a pilot resource subset selection signaling when a base station configures periodic CSI feedback for a non-Europe feedback class according to an embodiment of the present disclosure;

FIG. 24 is a schematic diagram of a pilot resource subset selection signaling when a base station configures periodic CSI feedback for N RI values according to an embodiment of the present disclosure;

FIG. 25 is a schematic diagram of pilot resource subset selection signaling when a base station is configured with a CSI feedback for a PMI enabled and disabled state according to an embodiment of the present disclosure;

FIG. 26 is a schematic diagram of pilot resource subset selection signaling when a base station is configured with periodic CSI feedback for an RI enabled and disabled state according to an embodiment of the present disclosure;

FIG. 27 is a schematic diagram of a pilot resource subset selection signaling when a base station performs periodic CSI feedback for each of the five PMI feedback dimensions according to an embodiment of the present disclosure;

FIG. 28 is a schematic diagram of a pilot resource subset selection signaling when a base station configures periodic CSI feedback for N feedback modes according to an embodiment of the present disclosure;

FIG. 29 is a schematic diagram of a pilot resource subset selection signaling when a base station configures periodic CSI feedback for N feedback types according to an embodiment of the present disclosure;

FIG. 30 is a schematic diagram of a channel measurement performed by a terminal using a feedback resource subset according to an embodiment of the present disclosure;

FIG. 31 is another schematic diagram of a channel measurement performed by a terminal using a feedback resource subset according to an embodiment of the present disclosure;

FIG. 32 is a structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 33 is a schematic diagram of a method for determining a subset of channel information measurement pilot resources according to an embodiment of the present disclosure;

FIG. 34 is a structural diagram of a terminal according to an embodiment of the present invention;

FIG. 35 is a structural diagram of a base station according to an embodiment of the present invention.

Embodiments of the invention

The invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

FIG. 1 is a flowchart of a method for selecting a subset of channel information measurement pilot resources according to an embodiment of the present invention. The method shown in Figure 1 includes:

Step 101: The terminal measures the resource subset selection signaling and/or according to the feedback mode of the channel information feedback on the physical uplink control channel and/or the feedback type of the channel information on the physical uplink control channel and/or the channel state information reference signal CSI-RS. The value of the rank indicator RI is determined by the base station to determine a CSI-RS resource subset in the CSI-RS configuration for the CSI process;

Step 102: The terminal performs measurement and channel information quantization based on the CSI-RS resource subset, and performs feedback on the physical uplink control channel by using the feedback type included in the feedback mode.

The method provided by the embodiment of the present invention is further described below:

FIG. 2 is a schematic diagram of a method for a terminal to select a CSI-RS resource subset according to an embodiment of the present invention. described as follows:

The CSI-RS resource subset may be a Yc set in an Xc set CSI-RS configuration;

And/or the CSI-RS resource subset may be Yr resource sets in Xr CSI-RS Resource Set configurations, and/or the resource subset may be Yp in Xp CSI-RS port port groups CSI-RS port group;

Optionally, the terminal determines, according to the feedback mode and/or the feedback type, a value of Yc and/or a value of Yr, and/or a value of Yp.

Optionally, the terminal determines an index of the Yc-set CSI-RS configuration according to the feedback mode and/or the feedback type, and/or a Set index included in the Yr CSI-RS Resource Sets, and/or Yr CSI-RS ports. The group index contained in the group port group,

Optionally, the measurement resource subset selection signaling is bitmap signaling, and each bit indicates selection information of one or more configurations and/or resource set and/or port group group;

Optionally, the base station separately configures CSI-RS measurement resource subset selection signaling for different feedback modes and/or feedback types.

The terminal further determines a subset selection method of the pilot resources according to the feedback class (Class) configuration signaling;

The terminal further determines a subset selection method of the pilot resource according to whether the PMI feedback enables the configuration signaling;

The terminal further determines a subset selection method of the pilot resource according to the dimension of the feedback of the PMI;

The advantage of the above manner is that the CSI-RS measurement resource subset selection can be performed through pre-agreed or signaling configuration, and the selection can be adapted to different feedback modes, feedback types, and feedback categories to adapt to these feedback modes and feedback types, and feedback categories. Resource subset selection for features and application scenarios.

In addition, the embodiment of the present invention further provides a method for configuring a subset of channel information measurement pilot resources, as shown in FIG. 4, including:

The base station sends pilot resource subset selection signaling to the terminal for periodic CSI feedback; wherein the terminal determines the pilot resource subset when CSI measurement and feedback based on the pilot resource subset selection signaling.

Optionally, the base station determines, according to the feedback mode, the subset size of the pilot resource subset selection signaling allowed to be configured;

Optionally, the base station determines, according to a feedback type, a subset size of the pilot resource subset selection signaling allowed to be configured;

Optionally, the base station determines, according to a feedback class, a subset size of the pilot resource subset selection signaling allowed configuration;

Optionally, the base station determines, according to the PMI feedback enabled configuration signaling, the subset size of the pilot resource subset selection signaling allowed to be configured;

Optionally, the base station determines, according to a dimension of the feedback of the PMI, the subset size of the pilot resource subset selection signaling allowed to be configured;

Optionally, the base station determines, according to the RI value, a subset size of the pilot resource subset selection signaling allowed to be configured;

Optionally, the base station configures, for the P process processes, the pilot resource subset selection signaling when the periodic CSI feedback is respectively configured;

Optionally, the base station configures pilot resource subset selection signaling for periodic CSI feedback for the P set of CSI-RSs;

Optionally, the base station configures pilot resource subset selection signaling when periodic CSI feedback is respectively configured for the feedback classes Class A and Class B;

Optionally, the base station configures pilot resource subset selection signaling when periodic CSI feedback is configured for each of the R RI values;

Optionally, the base station configures pilot resource subset selection signaling when periodic CSI feedback is respectively configured for PMI enable and disable.

Optionally, the base station configures pilot resource subset selection signaling when periodic CSI feedback is respectively configured for RI enable and disable.

Optionally, the base station separately configures pilot resource subset selection signaling during periodic CSI feedback for the feedback dimensions of the Q PMIs.

According to an embodiment of the present invention, a base station sends a pilot resource subset selection signaling to a terminal for periodic CSI feedback, where the terminal determines a pilot resource when CSI measurement and feedback based on the pilot resource subset selection signaling. Set, compromise CIT accuracy and feedback type of bit error rate performance, so that the CSI accuracy and feedback type of bit error rate performance is balanced.

Embodiment 1: The terminal determines the selection of the subset according to the feedback mode;

In the LTE/LTE-A standard, there are two feedback modes, periodic feedback and aperiodic feedback. The feedback mode includes multiple feedback modes. Different feedback modes define different feedback content and feedback accuracy. In the periodic feedback mode, the base station can configure the feedback mode for the terminal. Table 1 shows the CQI and PMI feedback types in the PUCCH feedback mode. details as follows:

Table 1

The periodic CSI feedback Mode 1-1 can be further divided into sub-mode 1 and sub-mode 2;

The base station may configure a plurality of process processes for the terminal, and each process corresponds to a feedback mode. FIG. 3 is a schematic diagram of a correspondence between a process and a feedback mode according to an embodiment of the present invention. As shown in Figure 3:

CSI Process 1 periodic CSI feedback mode a, aperiodic CSI feedback mode a;

CSI Process2 periodic CSI feedback mode b, aperiodic CSI feedback mode b;

.......;

The CSI Process n medium cycle CSI feedback mode n, the aperiodic CSI feedback mode n.

The feedback mode can be selected in the optional feedback mode table according to the current transmission mode. For the specific correspondence, refer to Table 2:

Table 2

The base station and the terminal appoint a subset of measurement pilot resources corresponding to different feedback modes, or the base station configures a corresponding subset of measurement pilot resources for each feedback mode; the size of the measurement pilot resource selection subset may be different, and the included The CSI-RS measurement resources may be different, and the CSI-RS measurement resources may be different if the size is the same. For details, refer to FIG. 5, which is a measurement pilot subset and a periodic CSI feedback mode according to an embodiment of the present invention. Schematic diagram of correspondence

Assuming a total of 16 sets of pilots are configured, the correspondence between the measurement subset and the CSI-RS can be:

The terminal determines the selection of the subset according to a feedback mode corresponding to the Process or the CSI-RS;

Embodiment 2: The terminal determines the selection of the subset according to the feedback Type;

In the cyclic feedback of LTE/LTE-A, there are multiple feedback types Report Type,

-Type 1report supports CQI feedback for the UE selected sub-bands

-Type 1a report supports subband CQI and second PMI feedback

-Type 2, Type 2b, and Type 2c report supports wideband CQI and PMI feedback

-Type 2a report supports wideband PMI feedback

-Type 3report supports RI feedback

-Type 4report supports wideband CQI

-Type 5report supports RI and wideband PMI feedback

-Type 6report supports RI and PTI feedback

For a variety of Report Type applications, the bit overhead is shown in the following table:

Table PUCCH Reporting Type Payload size per PUCCH Reporting Mode and Mode State

The base station and the terminal appoint a subset of measurement pilot resources corresponding to different feedback types, or the base station configures a corresponding subset of measurement pilot resources for each feedback type. Figure 6 is a diagram of an embodiment of the present invention Schematic diagram of the correspondence between the feedback type configuration and the measurement pilot resource selection subset. The terminal determines the selection of the subset according to the feedback Type that is currently reported;

Example 3:

The base station and the terminal appoint a subset of the measurement pilot resources corresponding to the values of the different RIs, or the base station configures a subset of the measurement pilot resources for each RI. For details, refer to FIG. 7, where FIG. 7 is provided in the embodiment of the present invention. Schematic diagram of the correspondence between the RI and the selected subset of measurement pilot resources.

The terminal determines the selection of the subset according to the current RI value to be reported, including size selection and index selection; for example, there are 16 sets of CSI-RSs, and the measurement pilot subsets are selected respectively.

Example 4:

The base station and the terminal appoint a subset of the measurement pilot resources corresponding to the different feedback class categories, or the base station configures a corresponding subset of the measurement pilot resources for each feedback class Class. For details, refer to FIG. 8, where FIG. 8 is an embodiment of the present invention. A schematic diagram of the correspondence between the provided feedback categories and the selected subset of measurement pilot resources. The terminal determines the selection of the subset according to the current Class category, including size selection and index selection.

Embodiment 5: The terminal determines the selection of the subset according to the configuration signaling;

The base station may configure the measurement pilot subset selection signaling for the PUCCH feedback of each process Process. For details, refer to FIG. 9, where FIG. 9 is a schematic diagram of the correspondence between the CSI Process and the measurement pilot subset provided by the embodiment of the present invention, where the terminal The size and content of the measurement pilot resource subset for each Process is determined based on the configuration signaling.

Embodiment 6: The terminal determines the selection of the subset according to the PMI enabling signaling;

The base station and the terminal appoint a subset of measurement pilot resources corresponding to different PMI enabled states, or the base station selects a subset of measurement pilot resources corresponding to different PMI enabled states.

FIG. 10 is a schematic diagram of whether a PMI is enabled to determine a measurement pilot subset selection signaling according to an embodiment of the present invention. FIG. 11 is a schematic diagram of determining signaling subset selection signaling according to whether a PMI is enabled according to an embodiment of the present invention.

Embodiment 7: The terminal determines the selection of the subset according to the RI enable signaling;

The base station and the terminal appoint a subset of measurement pilot resources corresponding to different RI enabled states, or the base station selects a subset of measurement pilot resources corresponding to different RI enabled states.

FIG. 12 is a schematic diagram of whether an RI enables determining a measurement pilot subset selection signaling according to an embodiment of the present invention. FIG. 13 is a schematic diagram of determining signaling pilot subset selection signaling according to whether RI is enabled for different CSI processes according to an embodiment of the present invention.

Example 8

The base station and the terminal appoint a subset of measurement pilot resources corresponding to different feedback dimension sizes, or the base station configures a subset of measurement pilot resources corresponding to different feedback dimension sizes; FIG. 14 is a feedback dimension size and A schematic diagram of measuring the correspondence of pilot resource selection subsets. The terminal may determine the measurement pilot subset selection signaling according to the feedback dimension size; or jointly determine based on the pilot port number and the feedback dimension.

Example 9

FIG. 15 is a schematic diagram of a base station transmitting pilot resource subset selection signaling to a terminal according to an embodiment of the present invention. In the schematic diagram shown in FIG. 15, the base station sends pilot resource subset selection signaling for periodic CSI feedback to the terminal; and the terminal determines pilot resource subsets for CSI measurement and feedback according to the pilot resource subset selection signaling; The terminal performs CSI measurement and reports CSI according to the subset of pilot resources.

The optional base station may determine, according to the feedback mode, the subset size of the pilot resource subset selection signaling allowed configuration; FIG. 16 is a correspondence between the periodic CSI feedback mode and the subset of the configurable pilot resource provided by the embodiment of the present invention. Schematic diagram of the relationship.

The optional base station may determine, according to a feedback type, a subset size of the pilot resource subset selection signaling allowed to be configured.

The optional base station may determine, according to a feedback class, a subset size of the pilot resource subset selection signaling allowed configuration; FIG. 17 is a feedback class and a subset of the pilotable resource subsets provided by the embodiment of the present invention. A schematic diagram of the correspondence.

The optional base station may determine the subset size of the pilot resource subset selection signaling allowed to be configured according to the PMI feedback enabled configuration signaling. FIG. 18 is a PMI feedback enable and a configurable pilot according to an embodiment of the present invention. Schematic diagram of the correspondence of resource subset sizes.

The optional base station may determine, according to the RI feedback-enabled configuration signaling, the subset size of the pilot resource subset selection signaling allowed configuration; FIG. 19 is the RI feedback enable and the configurable pilot provided by the embodiment of the present invention. Schematic diagram of the correspondence of resource subset sizes.

The optional base station may determine the subset size of the pilot resource subset selection signaling allowed to be configured according to the dimension of the feedback of the PMI; FIG. 20 is a feedback dimension and a configurable pilot resource of the PMI according to the embodiment of the present invention. A schematic diagram of the correspondence of set sizes.

The optional base station may determine the subset size of the pilot resource subset selection signaling allowed to be configured according to the RI value; FIG. 21 is the correspondence between the RI value and the subset of the configurable pilot resource provided by the embodiment of the present invention. Schematic diagram of the relationship.

Example 10:

Optionally, the base station configures pilot resource subset selection signaling for periodic CSI feedback for each of the N processes. FIG. 22 is a schematic diagram of pilot resource subset selection when the base station configures periodic CSI feedback for each of the N processes according to the embodiment of the present invention. Schematic diagram of signaling.

Optionally, the base station configures pilot resource subset selection signaling for periodic CSI feedback for the feedback classes Class A and Class B, respectively. FIG. 23 is a pilot station configured to configure periodic CSI feedback for different feedback classes according to an embodiment of the present invention. Schematic diagram of resource subset selection signaling.

Optionally, the base station configures pilot resource subset selection signaling for periodic CSI feedback for each of the N RI values; FIG. 24 is a pilot station configured to configure periodic CSI feedback for each of the N RI values according to the embodiment of the present invention. Schematic diagram of resource subset selection signaling.

Optionally, the base station configures pilot resource subset selection signaling for periodic CSI feedback in the case of PMI enable and disable, respectively. FIG. 25 is a case where the base station is enabled and disabled by the PMI according to the embodiment of the present invention. A schematic diagram of pilot resource subset selection signaling when periodic CSI feedback is separately configured.

Optionally, the base station configures pilot resource subset selection signaling for periodic CSI feedback for RI enable and disable conditions respectively. FIG. 26 is a case where the base station is enabled and disabled for the RI according to the embodiment of the present invention. A schematic diagram of pilot resource subset selection signaling when periodic CSI feedback is separately configured.

Optionally, the base station configures the pilot resource subset selection signaling for the periodic CSI feedback for the dimensions of the feedback of the five types of PMIs. FIG. 27 is configured to configure the periodic CSI for the dimensions of the feedback of the five PMIs by the base station according to the embodiment of the present invention. Schematic diagram of pilot resource selection control signaling at the time of feedback.

Optionally, the base station configures the pilot resource subset selection signaling for the periodic CSI feedback for the N feedback modes, and the base station provides the pilot resource for the CSI feedback for the N feedback modes. Schematic diagram of set selection signaling.

Optionally, the base station configures a pilot resource subset selection signaling for periodic CSI feedback for each of the N feedback types. FIG. 29 is a flowchart, where the base station provides a periodic CSI feedback pilot resource for each of the N feedback types. Schematic diagram of set selection signaling.

Example 11

In addition to being used for precoding pilots, the embodiments of the present invention may actually be used for non-precoded pilots, such as the total number of non-precoded pilot ports is 16, and some feedback modes of PUSCH aperiodic CSI feedback are in 16 dimensions. The CSI performs feedback, and finds an index corresponding to the quantized precoding codeword from a 16-dimensional codebook and feeds back to the base station;

However, due to the feedback of PUCCH, the feedback overhead of each mode must be small. If the 16-dimensional CSI feedback is still used, the number of codewords will be too small, and the 16-dimensional space cannot be quantized well. The CSI quantization performance of many UEs is extremely poor. Situation, therefore, it is better to adopt more robust low-dimensional CSI feedback, so that a part of ports from 16 ports of CSI-RS need to be selected as a port subset for PUCCH feedback;

In a fixed manner, the feedback mode for all PUCCHs is as follows:

Assuming that even or odd-numbered antenna ports are used, a subset of CSI-RS resources of 8 ports is obtained for PUCCH feedback;

Alternatively, when the feedback type is RI, the reporting CSI is quantized according to 16 ports, and when the feedback type includes the PMI, the reporting is based on 8-port quantization;

The PUCCH may also be determined according to the CSI-RS measurement resource subset selection signaling configured by the base station. A subset of measurement resource ports corresponding to each Report Type report.

It is also possible to determine a resource subset from the base station for configuring CSI-RS in the CSI process according to the value of the RI. For example, when the RI is 1, the 16 ports are measured, and when the RI is 2, 8 ports are measured, and when the RI is 3, 4, Measure 4 ports.

Example 12

One way is to determine the subset of pilots selected during the subsequent measurement period based on the content reported in the Report Type; for example:

The base station configures eight sets of CSI-RS resources or configurations for the terminal, and the terminal selects a subset from the terminal, for example, the subset may be two sets of CSI-RS resources or configurations;

Or this subset may be one set of CSI-RS resource or configuration;

The terminal informs the base station of the selected subset information, which can be implemented by feedback of the physical uplink control channel, for example, a 3-bit BEA Index information can complete an indication of a set of CSI-RS resource or configuration;

In addition to reporting the selected subset of measurement resources: X sets of CSI-RS resource or configuration, 1 ≤ X < 8, the terminal should also send an indication message on the uplink control channel to inform the base station to receive the information from the receiver. The sub-frames will be measured using the subset of measurement resources they report until the next receipt of the indication, as shown in the following figure. FIG. 30 is a schematic diagram of a channel measurement performed by a terminal using a fed back resource subset according to an embodiment of the present invention.

Optionally, the resource subset selection indication signaling may be fed back in the same Report Type as the measurement resource restriction signaling; and may be fed back together with the RI, as shown in the following figure, FIG. 31 is a terminal provided by an embodiment of the present invention. Another schematic of channel measurement using a subset of the feedback resources.

Example 13

As in the previous embodiment, there is a case where the measurement resource restriction signaling is not fed back, and the base station and the terminal agree to trigger the measurement resource limitation by default when receiving the resource subset selection indication signaling, in a feedback period of the signaling. Within, the indicated subset of measurement resources is used for channel measurement.

FIG. 32 is a structural diagram of a terminal according to an embodiment of the present invention. The terminal shown in Figure 32 includes:

The first determining module 201 is configured to: according to the feedback mode of the channel information feedback on the physical uplink control channel and/or the feedback type and/or channel state information of the channel information on the physical uplink control channel. The CSI-RS measurement resource subset selection signaling and/or the rank indicator RI value is determined, and the base station determines a CSI-RS resource subset in the CSI-configuration CSI-RS.

The processing module 202 is configured to perform measurement and channel information quantization based on the CSI-RS resource subset;

The feedback module 203 is configured to perform feedback on the physical uplink control channel by using the feedback type included in the feedback mode.

among them:

The resource subset is Yp CSI-RS port groups in Xp CSI-RS port groups;

Among them, Xc, Yc, Xr, Yr, Xp and Yp are all positive integers.

The first determining module 201 is configured to determine the value of the Yc and/or the value of Yr and/or the value of Yp according to the feedback mode and/or the feedback type.

The first determining module 201 is configured to determine an index of a Yc-set CSI-RS configuration according to the feedback mode and/or a feedback type, and/or a Set index included in a Yr CSI-RS resource group Resource Set, And/or group index included in the Yr CSI-RS port group port group.

The first determining module 201 is further configured to determine a subset selection method of the pilot resources according to the feedback category configuration signaling.

The first determining module 201 is further configured to determine a subset selection method of the pilot resources according to whether the PMI feedback enables configuration signaling.

The first determining module 201 is further configured to determine a subset selection method of the pilot resources according to the dimension of the feedback of the PMI.

The embodiment provided by the present invention, according to the feedback mode of the channel information feedback on the physical uplink control channel and/or the feedback type of the channel information on the physical uplink control channel and/or the channel state information reference signal CSI-RS measurement resource subset selection signaling And/or the value of the rank indicator RI, determining, by the base station, a CSI-RS resource subset in the CSI-RS configuration CSI-RS, performing measurement and channel information quantization based on the CSI-RS resource subset, and passing the feedback The feedback type included in the mode is fed back on the physical uplink control channel, and the error rate performance of the CSI precision and the feedback type is compromised, so that the balanced CSI precision and the feedback type bit error rate performance are balanced.

In addition, the embodiment of the present invention further provides a method for determining a subset of channel information measurement pilot resources, as shown in FIG. 33, including:

The terminal selects a subset of resources from the channel information measurement pilot resources configured by the base station;

The terminal feeds back the resource subset by using a first type of physical uplink control signaling;

The terminal notifies the base station that the channel state information CSI feedback in the agreed time range is measured by the resource subset of the feedback channel information measurement pilot by using the second type of physical uplink control channel signaling.

Optionally, the agreed time range size is a feedback period of the feedback type in which the feedback signaling is located.

Optionally, the notification signaling and the rank feedback information of the channel are fed back in the same feedback type.

Optionally, the notification signaling and the selection of the resource subset indicate that the signaling is fed back in the same feedback type.

In addition, the embodiment of the present invention further provides a terminal, as shown in FIG. 34, including:

a processing module, configured to: select a resource subset from the channel information measurement pilot resources configured by the base station; feed back the resource subset by using the first type of physical uplink control signaling; and notify the base station by using the second type physical uplink control channel signaling The CSI feedback within the agreed time range is measured using a subset of the channel information measurement pilots of the feedback.

Wherein, the notification signaling and the selection of the subset of resources indicate signaling in the same feedback type. Give feedback.

The embodiment provided by the present invention, according to the feedback mode of the channel information feedback on the physical uplink control channel and/or the feedback type of the channel information on the physical uplink control channel and/or the channel state information reference signal CSI-RS measurement resource subset selection signaling And/or the value of the rank indicator RI, the base station determines a CSI-RS resource subset in the CSI-RS configuration for the CSI process, and compromises the CSI accuracy and the error rate performance of the feedback type, so that the CSI precision and the feedback type are balanced. The BER performance is balanced.

In addition, an embodiment of the present invention provides a base station, as shown in FIG. 35, including:

And a sending module, configured to send pilot resource subset selection signaling to the terminal for periodic CSI feedback, where the pilot resource subset selection signaling is used by the terminal to determine a pilot resource subset when CSI measurement and feedback.

Optionally, the base station further includes:

a second determining module, configured to determine, by the base station, the pilot resource subset selection according to the RI value Signaling allows the configured subset size.

Optionally, the base station further includes:

The base station further includes:

According to an embodiment of the present invention, a base station sends a pilot resource subset selection signaling to a terminal for periodic CSI feedback, where the terminal determines a pilot resource when CSI measurement and feedback based on the pilot resource subset selection signaling. Set, compromise CIT accuracy and feedback type of bit error rate performance, so that balanced CSI accuracy and feedback type of bit error rate performance is balanced.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Industrial applicability

The above technical solution compromises the bit error rate performance of the CSI precision and the feedback type, so that the CSI precision and the feedback type bit error rate performance are balanced.

Claims

A method for selecting a subset of channel information measurement pilot resources, comprising:

The terminal measures the resource subset selection signaling and/or the rank indicator according to the feedback mode of the channel information feedback on the physical uplink control channel and/or the feedback type of the channel information on the physical uplink control channel and/or the channel state information reference signal CSI-RS. The value of the RI is determined by the base station to determine a CSI-RS resource subset in the CSI-RS for the CSI process configuration;

The terminal performs measurement and channel information quantization based on the CSI-RS resource subset and performs feedback on the physical uplink control channel by using the feedback type included in the feedback mode.
The method of claim 1 wherein:

The CSI-RS resource subset is a Yc set in an Xc set CSI-RS configuration; and/or,

The CSI-RS resource subset is Yr resource sets in Xr CSI-RS resource set configurations; and/or,

The CSI-RS resource subset is Yp CSI-RS port groups in Xp CSI-RS port groups;

Among them, Xc, Yc, Xr, Yr, Xp and Yp are all positive integers.
The method according to claim 2, wherein the terminal determines the value of the Yc and/or the value of Yr and/or the value of Yp according to the feedback mode and/or the type of feedback.
The method according to claim 3, wherein the terminal determines an index of a Yc-set CSI-RS configuration according to the feedback mode and/or a feedback type, and/or a set included in a Yr CSI-RS resource group Resource Set Index, and/or Yr group index of group included in the CSI-RS port group port group.
The method of claim 1, wherein the measurement resource subset selection signaling is bitmap bitmap signaling, each bit indicating selection information of one or more configurations and/or resource groups and/or port groups .
The method of claim 1, wherein the base station separately configures CSI-RS measurement resource subset selection signaling for different feedback modes and/or feedback types.
The method of claim 1 further comprising:

The terminal determines a subset selection method of the pilot resources according to the feedback category configuration signaling.
The method of claim 1 further comprising:

The terminal returns, according to the precoding matrix indicator PMI, whether the configuration signaling is enabled to determine a subset selection method of the pilot resource.
The method of claim 1 further comprising:

The terminal determines a subset selection method of pilot resources according to a dimension of feedback of the precoding matrix indicator PMI.
A method for configuring a subset of channel information measurement pilot resources, including:

The base station sends pilot resource subset selection signaling to the terminal for periodic channel state information CSI feedback, where the pilot resource subset selection signaling is used by the terminal to determine a subset of pilot resources when CSI measurement and feedback.
The method of claim 10 further comprising

Determining, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the feedback mode.
The method of claim 10 further comprising

Determining, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the feedback type.
The method of claim 10 further comprising

Determining, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the feedback category.
The method of claim 10 further comprising

The base station determines, according to the precoding matrix indicator PMI feedback enabled configuration signaling, the subset size of the pilot resource subset selection signaling allowed configuration.
The method of claim 10 further comprising

The base station determines, according to a dimension of the feedback of the precoding matrix indicator PMI, the subset size of the pilot resource subset selection signaling allowed configuration.
The method of claim 10 further comprising

Determining, by the base station, the pilot resource subset selection signaling permission according to the value of the rank indicator RI The configured subset size.
The method of claim 10 further comprising

The base station configures pilot resource subset selection signaling for periodic CSI feedback for the P process processes, where P is an integer greater than 1.
The method of claim 10 further comprising

The base station configures pilot resource subset selection signaling for periodic CSI feedback for the P set channel state information reference signal CSI-RS, where P is an integer greater than 1.
The method of claim 10 further comprising

The base station configures pilot resource subset selection signaling for periodic CSI feedback for the feedback classes Class A and Class B, respectively.
The method of claim 10 further comprising

The base station configures pilot resource subset selection signaling for periodic CSI feedback for the R rank indicator RI values, where R is an integer greater than 1.
The method of claim 10 further comprising

The base station configures pilot resource subset selection signaling when periodic CSI feedback is respectively configured for the precoding matrix indicator PMI enable and disable.
The method of claim 10 further comprising

The base station configures pilot resource subset selection signaling when periodic CSI feedback is respectively configured for the rank indicator RI enable and disable.
The method of claim 10 further comprising

The base station configures pilot resource subset selection signaling for periodic CSI feedback for the dimension of the feedback of the Q coding matrix indicator PMI, where Q is an integer greater than 1.
A terminal comprising:

The first determining module is configured to: according to a feedback mode of channel information feedback on the physical uplink control channel and/or a feedback type of channel information on the physical uplink control channel and/or a channel state information reference signal CSI-RS measurement resource subset selection signaling And/or the value of the rank indicator RI, the base station determines a CSI-RS resource subset in the CSI-RS configuration for the CSI process;

a processing module, configured to perform measurement and channel information quantization based on the CSI-RS resource subset;

The feedback module is configured to perform feedback on the physical uplink control channel by using the feedback type included in the feedback mode.
The terminal of claim 24 wherein:

The CSI-RS resource subset is a Yc set in an Xc set CSI-RS configuration; and/or,

The CSI-RS resource subset is Yr resource sets in Xr CSI-RS resource set configurations; and/or,

The CSI-RS resource subset is Yp CSI-RS port groups in Xp CSI-RS port groups;

Among them, Xc, Yc, Xr, Yr, Xp and Yp are all positive integers.
The terminal according to claim 25, wherein the first determining module is configured to determine the value of the Yc and/or the value of Yr and/or the Yp according to the feedback mode and/or the feedback type. value.
The terminal according to claim 26, wherein the first determining module is configured to determine an index of a Yc-set CSI-RS configuration according to the feedback mode and/or a feedback type, and/or Yr CSI-RS resource groups The Set index contained in the Resource Set, and/or the group group index included in the Yr CSI-RS port group port group.
The terminal according to claim 24, wherein the measurement resource subset selection signaling is bitmap bitmap signaling, and each bit indicates selection information of one or more configurations and/or resource groups and/or port groups. .
The terminal according to claim 24, wherein the base station separately configures CSI-RS measurement resource subset selection signaling for different feedback modes and/or feedback types.
The terminal according to claim 24, wherein the first determining module is further configured to determine a subset selection method of the pilot resources according to the feedback category configuration signaling.
The terminal according to claim 24, wherein the first determining module is further configured to: according to the precoding matrix indicator PMI, feedback whether to enable configuration signaling to determine a subset selection method of pilot resources.
The terminal according to claim 24, wherein the first determining module is further configured to determine a subset selection method of pilot resources according to a dimension of feedback of the precoding matrix indicator PMI.
A base station comprising:

a sending module, configured to send pilot resource subset selection signaling to the terminal when the periodic channel state information CSI feedback is used, where the pilot resource subset set signaling is used by the terminal to determine pilot resources when CSI measurement and feedback Subset.
The base station according to claim 33, the base station further comprising:

And a second determining module, configured to determine, according to the feedback mode, the subset size of the pilot resource subset selection signaling allowed configuration.
The base station according to claim 33, the base station further comprising:

And a second determining module, configured to determine, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the feedback type.
The base station according to claim 33, the base station further comprising:

And a second determining module, configured to determine, according to the feedback category, the subset size of the pilot resource subset selection signaling allowed configuration.
The base station according to claim 33, the base station further comprising:

And a second determining module, configured to determine, according to the precoding matrix indicator PMI feedback enabled configuration signaling, the subset size of the pilot resource subset selection signaling allowed configuration.
The base station according to claim 33, the base station further comprising:

And a second determining module, configured to determine, according to a dimension of the feedback of the precoding matrix indicator PMI, the subset size of the pilot resource subset selection signaling allowed configuration.
The base station according to claim 33, the base station further comprising:

And a second determining module, configured to determine, by the base station, the subset size of the pilot resource subset selection signaling allowed configuration according to the value of the rank indicator RI.
The base station according to claim 33, the base station further comprising:

The configuration module is configured to separately configure pilot resource subset selection signaling when the periodic CSI feedback is configured for the P process processes, where P is an integer greater than 1.
The base station according to claim 33, the base station further comprising:

Configure the module to set the period for the P-channel channel state information reference signal CSI-RS. The pilot resource subset selection signaling is used for CSI feedback, where P is an integer greater than one.
The base station according to claim 33, the base station further comprising:

The configuration module is configured to configure pilot resource subset selection signaling when periodic CSI feedback is configured for the feedback classes Class A and Class B, respectively.
The base station according to claim 33, the base station further comprising:

The configuration module is configured to configure a pilot resource subset selection signaling when the periodic CSI feedback is respectively set for the R rank indicator RI values, where R is an integer greater than 1.
The base station according to claim 33, the base station further comprising:

The configuration module is configured to configure pilot resource subset selection signaling when periodic CSI feedback is respectively configured for the coding matrix indicator PMI enable and disable.
The base station according to claim 33, the base station further comprising:

The configuration module is configured to configure the pilot resource subset selection signaling when the periodic CSI feedback is respectively configured for the rank indicator RI enable and disable conditions.
The base station according to claim 33, the base station further comprising:

The configuration module is configured to separately configure pilot resource subset selection signaling when the periodic CSI feedback is used for the feedback of the Q coding matrix indicator PMI, where Q is an integer greater than 1.
A method for determining a subset of channel information measurement pilot resources, comprising:

The terminal selects a subset of resources from the channel information measurement pilot resources configured by the base station;

The terminal feeds back the resource subset by using a first type of physical uplink control signaling;

The terminal notifies the base station that the channel state information CSI feedback in the agreed time range is measured by using the resource subset of the feedback channel information measurement pilot by using the second type of physical uplink control channel signaling.
The method according to claim 47, wherein the agreed time range size is a feedback period of a feedback type in which feedback signaling is located.
The method of claim 47, wherein the notification signaling and the rank feedback information of the channel are fed back in the same feedback type.
The method of claim 47 wherein the notification signaling and selection of a subset of resources Indication signaling is fed back in the same feedback type.
A terminal comprising:

a processing module, configured to: select a resource subset from the channel information measurement pilot resources configured by the base station; feed back the resource subset by using the first type of physical uplink control signaling; and notify the base station by using the second type physical uplink control channel signaling The channel state information CSI feedback within the agreed time range is measured using a subset of the channel information measurement pilots of the feedback.
The terminal according to claim 51, wherein the agreed time range size is a feedback period of a feedback type in which the feedback signaling is located.
The terminal according to claim 51, wherein the notification signaling and the rank feedback information of the channel are fed back in the same feedback type.
The terminal of claim 51, wherein the notification signaling and the selection of the subset of resources indicate that signaling is fed back in the same feedback type.