WO2018127038A1 - Method of transmitting channel state information, device, and system - Google Patents

Abstract

The invention relates to the field of radio communication, and specifically, to a method of transmitting channel state information (CSI), a device, and a system. The method comprises: UE receives downlink signaling transmitted from a base station and carrying a feedback identification; and the UE determines, according to the feedback identification, a CSI characteristic, and performs, according to the CSI characteristic, a channel measurement to obtain CSI to be fed back to the base station; wherein the CSI characteristic comprises at least one of a CSI type, a CSI measurement method, and a CSI feedback opportunity. Since the CSI characteristic comprises at least one of the CSI type, the CSI measurement method, and the CSI feedback, opportunity, the CSI characteristic can include a plurality of combinations of various CSI types and various CSI measurement methods, achieving flexible CSI feedback from UE to a base station.

Description

Method, device and system for transmitting channel state information

This application claims priority to Chinese Patent Application, filed on Jan. 5, 2017, to the Chinese National Intellectual Property Office, Application No. 201710007146.2, entitled "Transmission Method, Apparatus, and System for Channel State Information", the entire contents of which are incorporated by reference. Combined in this application.

Technical field

The present application relates to the field of wireless communications, and in particular, to a method, device, and system for transmitting channel state information.

Background technique

In a wireless communication system, such as a Long Term Evolution (LTE) communication system, Multiple Input Multiple Output (MIMO) technology is a widely used technology. In a MIMO communication system, a transmitting node (such as a base station) can acquire channel state information (English: Channel Statement Information; CSI) sent by a receiving node (such as a user equipment) to precode the downlink signal according to the CSI, and A suitable scheduling policy is selected for the downlink signal, where the CSI is obtained by the receiving node for channel measurement.

Currently, the receiving node can feed back the CSI to the sending node according to a predetermined combination of the type of CSI and the measurement mode of the CSI. This type of receiving node feedbacks CSI in a single way with low flexibility.

Summary of the invention

In order to solve the problem of low flexibility of the prior art CSI feedback, the present application provides a method, an apparatus, and a system for transmitting channel state information. The technical solution is as follows:

In a first aspect, a method for transmitting channel state information is provided, the method comprising:

Receiving downlink signaling sent by the base station, where the downlink signaling carries a feedback identifier;

Determining, according to the feedback identifier, a channel state information CSI feature corresponding to the feedback identifier, where the CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing;

Performing channel measurement according to the CSI feature corresponding to the feedback identifier, to obtain CSI;

Sending the CSI to the base station.

After receiving the downlink signaling, the user equipment (English: User Equipment; UE for short) may determine the CSI feature corresponding to the feedback identifier based on the feedback identifier carried in the downlink signaling, and perform channel measurement according to the CSI feature. To feed back the CSI obtained by channel measurement to the base station. The CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing, that is, the CSI feature may include multiple CSI types, a CSI measurement mode, and a CSI feedback timing combination, so that the UE moves to the base station. Feedback CSI is more flexible.

Before the determining the CSI feature corresponding to the feedback identifier, the method for transmitting the channel state information further includes: receiving, by the base station, high layer configuration signaling, where the high layer configuration signaling indicates mapping of at least one set of feedback identifiers and CSI features relationship;

Correspondingly, the determining the CSI feature corresponding to the feedback identifier includes:

Determining, according to the mapping relationship, the CSI feature corresponding to the feedback identifier carried by the downlink signaling.

In this way, the mapping relationship between the at least one set of the feedback identifier and the CSI feature can be configured by the base station by using the high-level configuration signaling, so that the base station can easily modify the mapping relationship according to the actual situation, thereby further improving the flexibility of the UE to feed back the CSI to the base station. Sex.

In an embodiment of the present application, the CSI feature includes: a combination of a CSI type, a CSI measurement mode, and a CSI feedback timing.

In another embodiment of the present application, the feedback identifier includes at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier.

In the above case, the determining, according to the feedback identifier, the CSI feature indicated by the feedback identifier includes:

Determining, according to the CSI type identifier, a CSI type corresponding to the CSI type identifier, when the feedback identifier includes the CSI type identifier;

Determining, according to the CSI measurement mode identifier, a CSI measurement mode corresponding to the CSI measurement mode identifier, when the feedback identifier includes the CSI measurement mode identifier;

When the feedback identifier includes the CSI feedback timing identifier, determining a CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier.

In an embodiment of the present application, the feedback identifier includes at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier.

In the above case, the determining, according to the feedback identifier, the CSI feature indicated by the feedback identifier includes:

Determining, according to the CSI type identifier, a CSI type corresponding to the CSI type identifier, when the feedback identifier includes the CSI type identifier;

Determining, according to the CSI measurement effective bandwidth identifier, a CSI measurement effective bandwidth corresponding to the CSI measurement effective bandwidth identifier, when the feedback identifier includes the CSI measurement effective bandwidth identifier;

Determining, according to the CSI measurement effective time identifier, a CSI measurement effective time corresponding to the CSI measurement effective time identifier, when the feedback identifier includes the CSI measurement effective time identifier;

When the feedback identifier includes the CSI feedback timing identifier, determining a CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier.

In an embodiment of the present application, the CSI type identifier occupies two identifier bits.

In a second aspect, a method for transmitting channel state information is provided, where the method includes:

Sending downlink signaling to the user equipment UE, where the downlink signaling carries a feedback identifier, where the feedback identifier is used to indicate a channel state information CSI feature, where the CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing. And performing, by the UE, channel measurement according to the CSI feature indicated by the feedback identifier, to obtain CSI;

Receiving the CSI sent by the UE.

In this way, the feedback identifier carried by the base station in the downlink signaling sent to the UE is used to indicate the CSI feature, so that the UE performs channel measurement according to the CSI feature to feed back the CSI obtained by the channel measurement to the base station. The CSI feature may include a combination of multiple CSI types, CSI measurement modes, and CSI feedback timings, so that the UE feedback CSI to the base station is more flexible.

In an embodiment of the present application, the method for transmitting the channel state information may further include: sending, to the UE, high layer configuration signaling, where the high layer configuration signaling indicates a mapping relationship between at least one set of feedback identifiers and CSI features. .

In this way, the UE can obtain the mapping relationship between the at least one set of the feedback identifier and the CSI feature through the high-level configuration signaling, so that the base station can easily modify the mapping relationship according to the actual situation, thereby further improving the flexibility of the UE to feed back the CSI to the base station.

In an embodiment of the present application, the CSI feature includes: a combination of the CSI type, the CSI measurement mode, and a CSI feedback timing.

In an embodiment of the present application, the feedback identifier includes at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier;

The CSI feature includes at least one of the CSI type corresponding to the CSI type identifier, the CSI measurement mode corresponding to the CSI measurement mode identifier, and the CSI feedback timing corresponding to the CSI feedback opportunity identifier.

In an embodiment of the present application, the feedback identifier includes at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier;

The CSI feature includes the CSI type corresponding to the CSI type identifier, the CSI measurement effective bandwidth identifier corresponding to the CSI measurement effective bandwidth identifier, and the CSI measurement effective time corresponding to the CSI measurement effective time identifier. The CSI feedback timing identifies at least one of the CSI feedback timings corresponding to the CSI feedback timing.

In an embodiment of the present application, the CSI type identifier occupies two identifier bits.

In a third aspect, a transmission apparatus for channel state information is provided, the transmission apparatus of the channel state information includes at least one module, and the at least one module is configured to implement the implementation of any one of the foregoing first aspect or the first aspect Method of transmitting channel state information.

A fourth aspect provides a transmission apparatus for channel state information, where the apparatus for transmitting channel state information includes at least one module, and the at least one module is configured to implement the implementation of any one of the foregoing second aspect or the second aspect. Method of transmitting channel state information.

In a fifth aspect, a transmission system for channel state information is provided, the transmission system of the channel state information comprising the transmission device of the first channel state information as provided in the third aspect above, and the second device as provided in the fourth aspect above A transmission device for channel state information.

In a sixth aspect, a transmission device is provided, the transmission device comprising: a processor, a transmitter, a receiver, and a memory, wherein the transmitter, the receiver, and the memory are respectively connected to the processor, and the processor is configured to execute the memory The stored instruction, the processor, by executing the instruction, implements a method for transmitting channel state information provided by any one of the foregoing first aspect or the first aspect.

In a seventh aspect, a transmission device is provided, the transmission device comprising: a processor, a transmitter, a receiver, and a memory, wherein the transmitter, the receiver, and the memory are respectively connected to the processor, and the processor is configured to execute the memory The stored instruction, the processor, by executing the instruction, implements a method for transmitting channel state information provided by any of the possible implementations of the second aspect or the second aspect.

The beneficial effects brought by the technical solutions provided by the present application are:

After receiving the downlink signaling, the UE determines the CSI feature corresponding to the feedback identifier based on the feedback identifier carried in the downlink signaling, and performs channel measurement according to the CSI feature to feed back the CSI obtained by the channel measurement to the base station. The CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing, that is, the CSI feature may include multiple CSI types, a CSI measurement mode, and a CSI feedback timing, so that the UE moves to the base station. Feedback CSI is more flexible.

DRAWINGS

FIG. 1 is a schematic diagram of a connection manner of devices in a wireless communication system provided by the present application.

FIG. 2 is a schematic structural diagram of a UE provided by the present application.

FIG. 3 is a schematic structural diagram of a base station provided by the present application.

FIG. 4 is a flowchart of a method for transmitting channel state information provided by the present application.

FIG. 5 is a schematic structural diagram of a transmission apparatus for channel state information provided by the present application.

FIG. 6 is a schematic structural diagram of a transmission apparatus for channel state information provided by the present application.

FIG. 7 is a schematic structural diagram of a transmission system for channel state information provided by the present application.

detailed description

In order to make the objects, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The present application provides a method for transmitting channel state information, which is applicable to device transmission channel state information in a wireless communication system. The following application briefly describes the connection manner of devices in the wireless communication system according to the present application:

As shown in FIG. 1, the above device may include a UE 101 and a base station 102. The data between the UE 101 and the base station 102 can be transmitted through a channel.

As shown in FIG. 2, in an embodiment of the present application, the foregoing UE 101 may include: a processor 1001, a receiver 1002, a transmitter 1003, and a memory 1004. The receiver 1002, the transmitter 1003, and the memory 1004 are connected to the processor 1001 via a bus, respectively.

The processor 1001 includes one or more processing cores, and the processor 1001 executes the transmission method of the channel state information provided by the present application by running a software program and a module. The memory 1004 can be used to store software programs as well as modules. Specifically, the memory 1004 can store an operating system 10041, an application module 10042 required for at least one function. The receiver 1002 is configured to receive communication messages sent by other devices, and the transmitter 1003 is configured to send communication messages to other devices.

As shown in FIG. 3, in an embodiment of the present application, the foregoing base station 102 may include: a processor 1101, a receiver 1102, a transmitter 1103, and a memory 1104. The receiver 1102, the transmitter 1103, and the memory 1104 are connected to the processor 1101 via a bus, respectively.

The processor 1101 includes one or more processing cores, and the processor 1101 performs a transmission method of channel state information provided by the present application by running a software program and a module. Memory 1104 can be used to store software programs as well as modules. Specifically, the memory 1104 can store an operating system 11041, an application module 11042 required for at least one function. The receiver 1102 is configured to receive communication messages sent by other devices, and the transmitter 1103 is configured to send communication messages to other devices.

FIG. 4 is a flowchart of a method for transmitting channel state information according to an exemplary embodiment. As shown in FIG. 4, the method for transmitting channel state information may be applied to a network architecture as shown in FIG. The method includes the following steps:

Step 401: The base station sends downlink signaling to the UE, where the downlink signaling carries a feedback identifier.

In the MIMO communication system, the UE can obtain the channel state information (Channel Statement Information; CSI for short) by measuring the channel, and the UE can feed back the CSI to the base station. Since the CSI can reflect the state and attributes of the channel, the base station can select an appropriate downlink signal transmission policy according to the indication of the CSI to improve the performance of the MIMO communication system.

In practical applications, the CSI may include multiple types, such as a channel quality indicator (CQI), a precoding matrix indicator (PMI), and a rank indication (English: Rank). Indicator; abbreviated as: RI), covariance matrix (English: covariance matrix), main eigen component of covariance matrix (English: main beam component), beam index (English: beam index). Among them, CQI, PMI, and RI are the most common types of CSI. In practical applications, the base station can determine the size, coding mode, and modulation mode of the transmitted data block according to the size of the CQI. The downlink signal can be precoded according to the PMI. The RI selects the appropriate spatial stream number to transmit the downlink signal.

In addition, the CSI measurement method may include a CSI measurement effective bandwidth and a CSI measurement effective time. The CSI measurement effective bandwidth may include full bandwidth (English: wideband), high-level subband bandwidth (English: sub-banded by high layer), user equipment selection sub-bandwidth (English: UE-selected subband), etc., where full bandwidth refers to The measurement of the entire working bandwidth is performed. The high-level configuration sub-bandwidth refers to measuring the sub-bandwidth of the high-level configuration, and the user equipment selecting the sub-bandwidth refers to measuring the sub-bandwidth selected by the UE. The CSI measurement effective time may include long-term (English: long-term) measurement, short-term (English: short-time) measurement, etc., where long-term measurement refers to long-term measurement of the channel, which reflects the channel for a period of time. The statistical characteristics inside, short-term measurement refers to the real-time measurement of the channel, which reflects the instantaneous state of the channel.

In addition, the timing at which the UE feeds back the CSI to the base station, that is, the CSI feedback timing may also be various. Specifically, the UE may periodically feed back the CSI (initial: periodic) to the base station, that is, the UE may continuously feed back the CSI to the base station at intervals; or, the UE may feed back the CSI to the base station (English: aperiodic) Alternatively, the UE may periodically feed back the CSI (semi-persistent) to the base station within a certain period of time, that is, the UE may feed back the CSI to the base station at regular intervals within a certain period of time, and after exceeding the certain time Stop feeding CSI to the base station.

It should be noted that the foregoing CSI type, CSI measurement mode, and CSI feedback timing are only exemplary. In practical applications, other CSI types, CSI measurement modes, and CSI feedback timings are also included. One by one.

In the existing MIMO communication system, the UE may perform channel measurement according to a fixed combination of a predetermined CSI measurement mode and a CSI type, and feed back CSI to the base station according to the result of the channel measurement and a predetermined CSI feedback timing. However, in a new generation communication system, such as the 5th generation communication system, since the transmission scheme (Transmission Scheme) is switched frequently, the base station needs to acquire different measurement methods and different types of combined CSIs at different timings. The manner in which the current UE feeds back CSI in a predetermined CSI feedback timing according to a predetermined combination of a predetermined CSI measurement mode and a CSI type cannot be applied to the requirements of a new generation communication system.

In the present application, in order to meet the requirements of the new generation communication system, the base station may send downlink signaling to the UE, such as Downlink Control Information (English: DCI). The downlink signaling carries a feedback identifier, where the feedback identifier is used to indicate a CSI feature, and the CSI feature may include at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing, that is, carried in downlink signaling sent by the base station. The CSI feature indicated by the feedback identifier may include any CSI type, any CSI measurement mode, any CSI feedback timing, or a combination thereof, and the UE performs channel measurement according to the CSI feature, and feeds back to the base station to measure through the channel. The resulting CSI, so that the base station can acquire different measurement modes and different types of combined CSI at different timings.

Step 402: The UE receives downlink signaling sent by the base station.

Step 403: The UE determines, according to the feedback identifier, a CSI feature corresponding to the feedback identifier, where the CSI feature includes one of a CSI type, a CSI measurement mode, and a CSI feedback timing.

In a practical application, a mapping relationship between at least one set of feedback identifiers and CSI features may be stored in the UE. After receiving the downlink signaling, the UE may extract the feedback identifier carried in the downlink signaling, and query the mapping relationship according to the feedback identifier carried in the downlink signaling to obtain the downlink signaling. The feedback identifies the corresponding CSI feature.

In practical applications, the mapping relationship stored in the UE may be various, and the following is only described in four possible forms:

The mapping relationship stored in the UE may be a mapping relationship between the at least one set of the feedback identifier and the combination of the CSI type, the CSI measurement mode, and the CSI feedback timing, that is, at least one set of the feedback identifier and the CSI. The mapping relationship between type, CSI measurement effective bandwidth, CSI measurement effective time, and CSI feedback timing. In this case, the CSI feature corresponding to the feedback identifier carried in the downlink signaling determined by the UE according to the feedback identifier carried in the downlink signaling is a combination of a CSI type, a CSI measurement mode, and a CSI feedback timing, that is, a CSI type, The CSI measures the combination of effective bandwidth, CSI measurement effective time, and CSI feedback timing.

For example, in the above case, the mapping relationship stored in the UE may be as shown in Table 1:

Table 1

It should be noted that the mapping relationship shown in Table 1 is merely exemplary, and it does not limit the present application.

In Table 1, the CSI type corresponding to the feedback identifier “0” is “CQI, PMI, and RI”, and the corresponding CSI measurement effective bandwidth is wideband, and the corresponding CSI measurement effective time is Long-term, and the corresponding CSI feedback timing is periodic. The CSI type corresponding to the feedback identifier "1" is CQI, the corresponding CSI measurement effective bandwidth is wideband, the corresponding CSI measurement effective time is Long-term, and the corresponding CSI feedback timing is periodic. The CSI features corresponding to other feedback identifiers in Table 1 are not described here.

If the mapping relationship stored in the UE is the mapping relationship shown in Table 1, if the feedback identifier carried in the downlink signaling received by the UE is “0”, the UE may query the mapping relationship in Table 1 to obtain the mapping relationship. The CSI feature corresponding to the feedback identifier “0” carried in the downlink signaling is “combination of CQI, PMI, RI, wideband, Long-term, and periodic”.

In the second embodiment, the feedback identifier in the mapping relationship stored in the UE may include a CSI type measurement mode joint identifier and a CSI feedback timing identifier, and the mapping relationship stored in the UE may include: at least one set of CSI type measurement manner joint identifiers and “ A mapping relationship between a CSI type and a CSI measurement mode combination, and a mapping relationship between at least one CSI feedback timing identifier and a CSI feedback timing, where the CSI measurement mode is a combination of a CSI measurement effective bandwidth and a CSI measurement effective time.

In this case, the feedback identifier carried in the downlink signaling may include at least one of a CSI type measurement mode joint identifier and a CSI feedback timing identifier. The CSI feature that is determined by the UE according to the feedback identifier carried in the downlink signaling, and the CSI feature corresponding to the feedback identifier carried in the downlink signaling is the combination of the CSI type and the CSI measurement mode and the CSI feedback timing corresponding to the CSI type measurement mode joint identifier. At least one of the corresponding CSI feedback timings is identified.

For example, the mapping relationship stored in the UE can be as shown in Table 2 and Table 3:

Table 2

table 3

It should be noted that the mapping relationship shown in Table 2 and Table 3 is merely exemplary, and it does not limit the present application.

In Table 2, the CSI type corresponding to the CSI type measurement mode is “CQI, PMI, and RI”, and the corresponding CSI measurement effective bandwidth is “wideband”, and the corresponding CSI measurement effective time is “Long-tem”. . In Table 3, the CSI feedback timing corresponding to the CSI feedback timing identifier “0” is “periodic”.

When the feedback identifier carried in the downlink signaling may include at least one of a CSI type measurement mode joint identifier and a CSI feedback timing identifier, when the feedback identifier carried in the downlink signaling includes only the CSI type measurement mode joint identifier, The UE may determine, according to the CSI type measurement mode, the combination of the CSI type, the CSI measurement effective bandwidth, and the CSI measurement effective time corresponding to the CSI type measurement mode joint identifier, and determine the feedback identifier carried in the downlink signaling. Corresponding CSI features. For example, if the feedback identifier carried in the downlink signaling includes only the CSI type measurement mode joint identifier, and the CSI type measurement mode joint identifier is 0, the query table 2 indicates that the feedback identifier carried in the downlink signaling corresponds to The CSI feature is a combination of "CQI, PMI, RI, wideband, and Long-tem."

When the feedback identifier carried in the downlink signaling includes only the CSI feedback timing identifier, the UE may determine the CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier, and determine the feedback identifier carried in the downlink signaling. Corresponding CSI features. For example, if the feedback identifier carried in the downlink signaling includes only the CSI feedback timing identifier, and the CSI feedback timing identifier is 1, the query table 3 indicates that the CSI feature corresponding to the feedback identifier carried in the downlink signaling is For "aperiodic".

When the feedback identifier carried in the downlink signaling includes the CSI type measurement mode joint identifier and the CSI feedback timing identifier, the UE may determine, according to the CSI type measurement mode joint identifier, the CSI type and CSI corresponding to the CSI type measurement mode joint identifier. The combination of measuring the effective bandwidth and the CSI measurement effective time may determine the CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier, and the above “CSI type, CSI measurement effective bandwidth and CSI measurement effective time combination” And the CSI feedback timing is determined as a CSI feature corresponding to the feedback identifier carried in the downlink signaling. For example, the CSI type measurement mode joint identifier of the feedback identifier carried in the downlink signaling is 1 and the CSI feedback timing identifier is 1, and the CSI corresponding to the feedback identifier carried in the downlink signaling is known by using the query table 2 and the table 3. Features "CQI, wideband, Long-tem, and aperiodic".

The third type, the feedback identifier in the mapping relationship stored in the UE may include a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier. The mapping relationship stored in the UE may include: at least one group of CSI type identifiers and CSI types. A mapping relationship, a mapping relationship between at least one set of CSI measurement mode identifiers and a CSI measurement mode, and a mapping relationship between at least one set of CSI feedback timing identifiers and CSI feedback timings.

In this case, the feedback identifier carried in the downlink signaling may include at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier. The CSI feature corresponding to the CSI type corresponding to the CSI type identifier and the CSI measurement mode identifier and the CSI feedback timing identifier corresponding to the CSI type identifier are determined by the UE according to the feedback identifier carried in the downlink signaling. At least one of the corresponding CSI feedback timings.

For example, the mapping relationship stored in the UE may be as shown in Table 4, Table 5, and Table 6:

Table 4

table 5

CSI measurement method identification CSI measures the effective bandwidth CSI measurement effective time 0 Wideband Long-tem 1 Wideband Long-term 2 Subband indicated by high layer Short-term 3 UE-selected subband Short-term 4 Wideband Long-term

Table 6

It should be noted that the mapping relationships shown in Table 4, Table 5, and Table 6 are merely exemplary, and are not intended to limit the application.

In Table 4, the CSI type corresponding to the CSI type identifier "0" is "CQI, PMI, and RI". In Table 5, the CSI measurement effective bandwidth corresponding to the CSI measurement mode identifier "0" is "wideband", and the corresponding CSI The measurement effective time is Long-term. In Table 6, the CSI feedback timing corresponding to the CSI feedback timing identifier “0” is “periodic”.

When the feedback identifier carried in the downlink signaling may include at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier, when the feedback identifier carried in the downlink signaling includes only the CSI type identifier, the UE The CSI type corresponding to the CSI type identifier may be determined according to the CSI type identifier, and determined as a CSI feature corresponding to the feedback identifier carried in the downlink signaling. For example, the feedback identifier carried in the downlink signaling includes only the CSI type identifier, and the CSI type identifier is 1. According to the query table 4, the CSI feature corresponding to the feedback identifier carried in the downlink signaling is “CQI”.

When the feedback identifier carried in the downlink signaling includes only the CSI measurement mode identifier, the UE may determine the CSI measurement mode corresponding to the CSI measurement mode identifier according to the CSI measurement mode identifier, and determine the feedback carried in the downlink signaling. The corresponding CSI feature is identified, and the CSI measurement mode is a combination of the CSI measurement effective bandwidth and the CSI measurement effective time. For example, the feedback identifier carried in the downlink signaling includes only the CSI measurement mode identifier, and the CSI measurement mode identifier is 1, and the CSI feature corresponding to the feedback identifier carried in the downlink signaling is “wideband”. Combination with Long-term".

When the feedback identifier carried in the downlink signaling includes only the CSI feedback timing identifier, the UE may determine the CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier, and determine the feedback carried in the downlink signaling. Identify the corresponding CSI feature. For example, the feedback identifier carried in the downlink signaling includes only the CSI feedback timing identifier, and the CSI feedback timing identifier is 1, and the CSI feature corresponding to the feedback identifier carried in the downlink signaling is “ Aperiodic".

Certainly, the feedback identifier carried in the downlink signaling may further include two or three types of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier. In this case, the UE uses the feedback identifier carried in the downlink signaling. The manner of determining the CSI feature corresponding to the feedback identifier carried in the downlink signaling is the same as the case where the feedback identifier carried in the downlink signaling includes only one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier. This application does not repeat here.

The fourth type, the feedback identifier in the mapping relationship stored in the UE may include a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier, where the mapping relationship stored in the UE may include: at least one group The mapping relationship between the CSI type identifier and the CSI type, the mapping relationship between the at least one CSI measurement effective bandwidth identifier and the CSI measurement effective bandwidth, the mapping relationship between the at least one CSI measurement effective time identifier and the CSI measurement effective time, and at least one set of CSI feedback The mapping relationship between the timing identifier and the CSI feedback timing.

In this case, the feedback identifier carried in the downlink signaling may include at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier. The CSI feature corresponding to the feedback identifier carried in the downlink signaling that is determined by the UE according to the feedback identifier carried in the downlink signaling is at least one of a CSI type, a CSI measurement effective bandwidth, a CSI measurement effective time, and a CSI feedback timing.

For example, the mapping relationship stored in the UE may be as shown in Table 7, Table 8, Table 9, and Table 10:

Table 7

Table 8

Table 9

Table 10

It should be noted that the mapping relationships shown in Table 7, Table 8, Table 9, and Table 10 are merely exemplary and are not intended to limit the application.

The feedback identifier carried in the downlink signaling when the feedback identifier carried in the downlink signaling may include at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier. When the CSI type identifier is included, the UE may determine the CSI type corresponding to the CSI type identifier according to the CSI type identifier, and determine the CSI feature corresponding to the feedback identifier carried in the downlink signaling. For example, if the CSI type identifier is included in the feedback identifier carried in the downlink signaling, and the CSI type identifier is 1, the CSI feature corresponding to the feedback identifier carried in the downlink signaling is “PMI”.

When the feedback identifier carried in the downlink signaling includes only the CSI measurement effective bandwidth identifier, the UE may determine the CSI measurement effective bandwidth corresponding to the CSI measurement effective bandwidth identifier according to the CSI measurement effective bandwidth identifier, and determine the downlink signaling as the downlink signaling. The feedback identifier carried in the identifier identifies the corresponding CSI feature. For example, if the CSI measurement effective bandwidth identifier is included in the feedback identifier carried in the downlink signaling, and the CSI measurement effective bandwidth identifier is 1, the CSI feature corresponding to the feedback identifier carried in the downlink signaling is "subband indicated by high layer".

When the feedback identifier carried in the downlink signaling includes only the CSI measurement effective time identifier, the UE may determine, according to the CSI measurement effective time identifier, a CSI measurement effective time corresponding to the CSI measurement effective time identifier, and determine the downlink signaling as the downlink signaling. The feedback identifier carried in the identifier identifies the corresponding CSI feature. For example, the feedback identifier carried in the downlink signaling includes only the CSI measurement effective time identifier, and the CSI measurement effective time identifier is 1, and the CSI feature corresponding to the feedback identifier carried in the downlink signaling is known by using the query table 9. Is "Short-term".

When the feedback identifier carried in the downlink signaling includes only the CSI feedback timing identifier, the UE may determine the CSI feedback timing corresponding to the first CS feedback timing identifier according to the CSI feedback timing identifier, and determine the downlink signaling to be carried in the downlink signaling. The feedback identifies the corresponding CSI feature. For example, if the feedback identifier carried in the downlink signaling includes only the CSI feedback timing identifier, and the CSI feedback timing identifier is 1, the query table 10 indicates that the CSI feature corresponding to the feedback identifier carried in the downlink signaling is “ Aperiodic".

The feedback identifier carried in the foregoing downlink signaling may further include two or three types of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier. In this case, the UE according to the downlink The manner in which the feedback identifier carried in the signaling determines the CSI feature corresponding to the feedback identifier carried in the downlink signaling, and the feedback identifier carried in the downlink signaling includes only the CSI type identifier, the CSI measurement effective bandwidth identifier, and the CSI measurement effective time identifier. The case of one of the CSI feedback timing identifiers is the same, and the present application will not repeat them here.

It should be noted that the mapping relationship of the foregoing four types of UEs is only exemplary. In an actual application, the types of mapping relationships stored by the UE may be more than four types described above. If the feedback identifier in the mapping relationship may include a CSI type and a feedback opportunity joint identifier and a CSI measurement mode identifier, the mapping relationship stored by the UE may include: at least one set of CSI types and a feedback opportunity joint identifier and a combination of “CSI type and CSI feedback timing” a mapping relationship between the CSI measurement mode identifier and the CSI measurement mode; and the feedback identifier in the mapping relationship may include a CSI type identifier, a CSI measurement mode, and a feedback opportunity joint identifier, where the mapping relationship stored by the UE may be The mapping relationship between the CSI type and the CSI type, and the mapping between the CSI measurement mode and the feedback opportunity joint identifier and the combination of the CSI measurement mode and the CSI feedback timing are not included in the present application. A narrative.

In an embodiment of the present application, the CSI type identifier may occupy two identifier bits. The identifier on the first identifier bit may indicate a certain subset of the CSI type, and the identifier on the second identifier bit may indicate that the subset of the CSI type indicated by the identifier on the first identifier bit includes A CSI type. For example, as shown in Table 11, a subset of the CSI types indicated by "0" in the CSI type identifier "01" may include four CSI types, CQI, PMI, RI, and beam index, and the CSI type identifier is "01". "1" indicates the PMI of the above CSI type subset, and the CSI type indicated by the CSI type identifier "01" is "PMI".

Table 11

It should be noted that the mapping relationship stored in the foregoing UE may be configured in advance by the system, or may be configured by the base station by using high-level configuration signaling, where the high-level configuration signaling may be radio resource control (English: Radio Resource Control; RRC) signaling, etc., is not specifically limited in this application. Specifically, the UE may receive the high-level configuration signaling sent by the base station, where the high-level configuration signaling indicates a mapping relationship between the at least one set of the feedback identifier and the CSI feature.

Step 404: The UE performs channel measurement according to the CSI feature corresponding to the feedback identifier carried in the downlink signaling, to obtain CSI.

It should be noted that, when the CSI feature corresponding to the feedback identifier carried in the downlink signaling includes only the CSI type, the UE may perform channel measurement according to the CSI type and the CSI measurement manner determined by other policies to obtain the CSI. The CSI measurement mode determined by the other policies may be a CSI measurement mode determined based on a preset setting, a CSI measurement mode determined based on a historical channel measurement, or the like, which is not specifically limited in this application. Of course, the CSI feature corresponding to the feedback identifier carried in the downlink signaling includes only the CSI measurement mode, or only one measurement mode of the CSI measurement mode (including only the CSI measurement effective bandwidth or only the CSI measurement effective time). The case where the channel measurement is performed by the UE and the CSI feature corresponding to the feedback identifier carried in the downlink signaling only includes the CSI type, and is not described herein again.

Step 405: The UE sends the CSI to the base station.

Step 406: The base station receives the CSI.

In summary, the method for transmitting channel state information provided by the present application determines, by the UE, the CSI feature corresponding to the feedback identifier, based on the feedback identifier carried in the downlink signaling, after receiving the downlink signaling, and according to the CSI feature. Channel measurements are made to feed back the CSI obtained by channel measurement to the base station. The CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing, so that the CSI corresponding to the feedback identifier carried in the downlink signaling is stored in the UE. The feature may include a combination of multiple CSI types, CSI measurement modes, and CSI feedback timings, so that the UE feedback CSI to the base station is more flexible.

FIG. 5 is a block diagram of a transmission apparatus 500 for channel state information, according to an exemplary embodiment. The transmission device 500 of the channel state information may be a UE. Referring to FIG. 5, the transmission apparatus 500 of the channel state information includes a receiving module 501, a determining module 502, a measuring module 503, and a transmitting module 504.

The receiving module 501 is configured to perform the foregoing step 402.

The determining module 502 is configured to perform the foregoing step 403.

The measuring module 503 is configured to perform the above step 404.

The sending module 504 is configured to perform the foregoing step 405.

In summary, the channel state information transmission apparatus provided in this embodiment determines the CSI feature corresponding to the feedback identifier based on the feedback identifier carried in the downlink signaling after receiving the downlink signaling, and according to the CSI feature. Channel measurements are made to feed back the CSI obtained by channel measurement to the base station. The CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing, so that the CSI corresponding to the feedback identifier carried in the downlink signaling is stored in the UE. The feature may include a combination of multiple CSI types, CSI measurement modes, and CSI feedback timings, so that the UE feedback CSI to the base station is more flexible.

FIG. 6 is a block diagram of a transmission apparatus 600 for channel state information, according to an exemplary embodiment. The transmission device 600 of the channel state information may be a base station. Referring to FIG. 6, the transmission apparatus 600 of the channel state information includes a transmitting module 601 and a receiving module 602.

The sending module 601 is configured to perform the foregoing step 401.

The receiving module 602 is configured to perform the foregoing step 406.

In summary, the channel state information transmission apparatus provided in this embodiment determines the CSI feature corresponding to the feedback identifier based on the feedback identifier carried in the downlink signaling after receiving the downlink signaling, and according to the CSI feature. Channel measurements are made to feed back the CSI obtained by channel measurement to the base station. The CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing, so that the CSI corresponding to the feedback identifier carried in the downlink signaling is stored in the UE. The feature may include a combination of multiple CSI types, CSI measurement modes, and CSI feedback timings, so that the UE feedback CSI to the base station is more flexible.

FIG. 7 is a block diagram of a transmission system 700 for channel state information, according to an exemplary embodiment. The transmission system of the channel state information includes a UE 701 and a base station 702.

The UE 701 is configured to perform operations performed by the UE in the embodiment shown in FIG. 4.

The base station 702 is configured to perform operations performed by the base station in the embodiment shown in FIG.

In summary, the channel state information transmission system provided by the present application determines the CSI feature corresponding to the feedback identifier based on the feedback identifier carried in the downlink signaling after receiving the downlink signaling, and performs the CSI feature according to the CSI feature. Channel measurement to feed back the CSI obtained by channel measurement to the base station. The CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing, so that the CSI corresponding to the feedback identifier carried in the downlink signaling is stored in the UE. The feature may include a combination of multiple CSI types, CSI measurement modes, and CSI feedback timings, so that the UE feedback CSI to the base station is more flexible.

The term “and/or” in the present application is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

The above-mentioned embodiments are not intended to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims (26)

A method for transmitting channel state information, characterized in that the method comprises: Receiving downlink signaling sent by the base station, where the downlink signaling carries a feedback identifier; Determining, according to the feedback identifier, a channel state information CSI feature corresponding to the feedback identifier, where the CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing; Performing channel measurement according to the CSI feature corresponding to the feedback identifier, to obtain CSI; Sending the CSI to the base station. The method according to claim 1, wherein before the determining the CSI feature corresponding to the feedback identifier, the method further includes: Receiving, by the base station, high layer configuration signaling, where the high layer configuration signaling indicates a mapping relationship between at least one set of feedback identifiers and CSI features; Correspondingly, the determining the CSI feature corresponding to the feedback identifier includes: Determining, according to the mapping relationship, the CSI feature corresponding to the feedback identifier carried by the downlink signaling. The method according to claim 1, wherein the CSI feature comprises: a combination of a CSI type, a CSI measurement mode, and a CSI feedback timing. The method according to claim 1, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier; Determining, according to the feedback identifier, the CSI feature indicated by the feedback identifier, including: Determining, according to the CSI type identifier, a CSI type corresponding to the CSI type identifier, when the feedback identifier includes the CSI type identifier; Determining, according to the CSI measurement mode identifier, a CSI measurement mode corresponding to the CSI measurement mode identifier, when the feedback identifier includes the CSI measurement mode identifier; When the feedback identifier includes the CSI feedback timing identifier, determining a CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier. The method according to claim 1, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier; Determining, according to the feedback identifier, the CSI feature indicated by the feedback identifier, including: Determining, according to the CSI type identifier, a CSI type corresponding to the CSI type identifier, when the feedback identifier includes the CSI type identifier; Determining, according to the CSI measurement effective bandwidth identifier, a CSI measurement effective bandwidth corresponding to the CSI measurement effective bandwidth identifier, when the feedback identifier includes the CSI measurement effective bandwidth identifier; Determining, according to the CSI measurement effective time identifier, a CSI measurement effective time corresponding to the CSI measurement effective time identifier, when the feedback identifier includes the CSI measurement effective time identifier; And determining, by the CSI feedback timing identifier, a CSI feedback timing corresponding to the CSI feedback timing identifier, when the feedback identifier includes the CSI feedback timing identifier. The method according to claim 4 or 5, wherein the CSI type identifier occupies two identification bits. A method for transmitting channel state information, characterized in that the method comprises: Sending downlink signaling to the user equipment UE, where the downlink signaling carries a feedback identifier, where the feedback identifier is used to indicate a channel state information CSI feature, where the CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing. And performing, by the UE, channel measurement according to the CSI feature indicated by the feedback identifier, to obtain CSI; Receiving the CSI sent by the UE. The method of claim 7, wherein the method further comprises: And sending high layer configuration signaling to the UE, where the high layer configuration signaling indicates a mapping relationship between at least one set of feedback identifiers and CSI features. The method according to claim 7, wherein the CSI feature comprises: a combination of the CSI type, the CSI measurement mode, and a CSI feedback timing. The method according to claim 7, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier; The CSI feature includes at least one of the CSI type corresponding to the CSI type identifier, the CSI measurement mode corresponding to the CSI measurement mode identifier, and the CSI feedback timing corresponding to the CSI feedback opportunity identifier. The method according to claim 7, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier; The CSI feature includes the CSI type corresponding to the CSI type identifier, the CSI measurement effective bandwidth identifier corresponding to the CSI measurement effective bandwidth identifier, and the CSI measurement effective time corresponding to the CSI measurement effective time identifier. The CSI feedback timing identifies at least one of the CSI feedback timings corresponding to the CSI feedback timing. The method according to claim 10 or 11, wherein the CSI type identifier occupies two identification bits. A transmission device for channel state information, characterized in that the device comprises: a receiving module, configured to receive downlink signaling sent by the base station, where the downlink signaling carries a feedback identifier; a determining module, configured to determine, according to the feedback identifier, a channel state information CSI feature corresponding to the feedback identifier, where the CSI feature includes at least one of a CSI type, a CSI measurement mode, and a CSI feedback timing; a measuring module, configured to perform channel measurement according to the CSI feature corresponding to the feedback identifier, to obtain CSI; And a sending module, configured to send the CSI to the base station. The apparatus according to claim 13, wherein the receiving module is further configured to receive high layer configuration signaling sent by the base station, where the high layer configuration signaling indicates a mapping relationship between at least one set of feedback identifiers and CSI features. ; The determining module is configured to determine, according to the mapping relationship, the CSI feature corresponding to the feedback identifier carried by the downlink signaling. The apparatus according to claim 13, wherein the CSI feature comprises: a combination of a CSI type, a CSI measurement mode, and a CSI feedback timing. The device according to claim 13, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier; The determining module is used to: Determining, according to the CSI type identifier, a CSI type corresponding to the CSI type identifier, when the feedback identifier includes the CSI type identifier; Determining, according to the CSI measurement mode identifier, a CSI measurement mode corresponding to the CSI measurement mode identifier, when the feedback identifier includes the CSI measurement mode identifier; When the feedback identifier includes the CSI feedback timing identifier, determining a CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier. The device according to claim 13, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier; The determining module is used to: Determining, according to the CSI type identifier, a CSI type corresponding to the CSI type identifier, when the feedback identifier includes the CSI type identifier; Determining, according to the CSI measurement effective bandwidth identifier, a CSI measurement effective bandwidth corresponding to the CSI measurement effective bandwidth identifier, when the feedback identifier includes the CSI measurement effective bandwidth identifier; Determining, according to the CSI measurement effective time identifier, a CSI measurement effective time corresponding to the CSI measurement effective time identifier, when the feedback identifier includes the CSI measurement effective time identifier; When the feedback identifier includes the CSI feedback timing identifier, determining a CSI feedback timing corresponding to the CSI feedback timing identifier according to the CSI feedback timing identifier. The apparatus according to claim 16 or 17, wherein the CSI type identifier occupies two identification bits. A transmission device for channel state information, characterized in that the device comprises: a sending module, configured to send downlink signaling to the user equipment UE, where the downlink signaling carries a feedback identifier, where the feedback identifier is used to indicate a channel state information CSI feature, where the CSI feature includes a CSI type, a CSI measurement mode, and a CSI feedback At least one of the timings, the UE performs channel measurement according to the CSI feature indicated by the feedback identifier, to obtain CSI; And a receiving module, configured to receive the CSI sent by the UE. The device according to claim 19, wherein the sending module is further configured to: And sending high layer configuration signaling to the UE, where the high layer configuration signaling indicates a mapping relationship between at least one set of feedback identifiers and CSI features. The apparatus according to claim 19, wherein the CSI feature comprises: a combination of the CSI type, the CSI measurement mode, and a CSI feedback timing. The apparatus according to claim 19, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement mode identifier, and a CSI feedback timing identifier; The CSI feature includes at least one of the CSI type corresponding to the CSI type identifier, the CSI measurement mode corresponding to the CSI measurement mode identifier, and the CSI feedback timing corresponding to the CSI feedback opportunity identifier. The device according to claim 19, wherein the feedback identifier comprises at least one of a CSI type identifier, a CSI measurement effective bandwidth identifier, a CSI measurement effective time identifier, and a CSI feedback timing identifier; The CSI feature includes the CSI type corresponding to the CSI type identifier, the CSI measurement effective bandwidth identifier corresponding to the CSI measurement effective bandwidth identifier, and the CSI measurement effective time corresponding to the CSI measurement effective time identifier. The CSI feedback timing identifies at least one of the CSI feedback timings corresponding to the CSI feedback timing. The apparatus according to claim 22 or 23, wherein the CSI type identifier occupies two identification bits. A transmission system for channel state information, characterized in that the system comprises: a transmission device for first channel state information according to any of claims 13-18 and a device according to any one of claims 19-24 A transmission device for two-channel state information. A non-transitory computer readable storage medium, wherein the computer readable storage medium stores a computer program, the computer program being executable by the processing component to implement any of claims 1-6 A method of transmitting channel state information, or a method of transmitting channel state information according to any one of claims 7-12, when the computer program is executed by a processing component.

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