CN114765483A - Method, device and terminal for reporting channel state information - Google Patents

Method, device and terminal for reporting channel state information Download PDF

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Publication number
CN114765483A
CN114765483A CN202110057998.9A CN202110057998A CN114765483A CN 114765483 A CN114765483 A CN 114765483A CN 202110057998 A CN202110057998 A CN 202110057998A CN 114765483 A CN114765483 A CN 114765483A
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cqi
subbands
sub
csi
bands
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陈晓航
潘学明
曾超君
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN202110057998.9A priority Critical patent/CN114765483A/en
Priority to PCT/CN2022/071236 priority patent/WO2022152105A1/en
Publication of CN114765483A publication Critical patent/CN114765483A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0675—Space-time coding characterised by the signaling
    • H04L1/0693—Partial feedback, e.g. partial channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a method, a device and a terminal for reporting channel state information, and belongs to the technical field of wireless communication. The method for reporting the channel state information comprises the following steps: the terminal measures CSI of N first sub-bands in a first time window, wherein the first time window comprises M time domain units, N is an integer larger than 1, and M is an integer larger than or equal to 1; selecting P second sub-bands from the N first sub-bands according to first CSI (channel state information) of the N first sub-bands measured in the first time window, wherein P is an integer which is greater than 0 and less than or equal to N; and reporting a CSI report, wherein the CSI report comprises second CSI corresponding to the P second sub-bands.

Description

Method, device and terminal for reporting channel state information
Technical Field
The present application belongs to the technical field of wireless communication, and in particular, to a method, an apparatus, and a terminal for reporting channel state information.
Background
Similar to a Long Term Evolution (LTE) system, a Downlink aperiodic Channel State Information (CSI) reporting mechanism is also introduced in a New Radio (NR) system, that is, a base station may use Downlink Control Information (DCI) of Uplink scheduling to trigger transmission of Downlink CSI on a scheduled Physical Uplink Shared Channel (PUSCH) according to needs. A base station may configure an Aperiodic Trigger State List (Aperiodic Trigger State List) for a User Equipment (UE) in advance through Radio Resource Control (RRC) signaling, where each State corresponds to an associated reported configuration information List, and each reported configuration information indicates how to report and which CSI Reference Signal (CSI-RS) Resource set to use. Specifically indicating which preconfigured aperiodic trigger state is actually triggered through a 'CSI request' field in the uplink scheduled DCI, and indicating that corresponding CSI reporting information is carried on a PUSCH scheduled by the DCI.
In the related art, when the aperiodic trigger state is triggered, the UE performs CSI measurement on a subband (subband) indicated by the triggered aperiodic trigger state at the current time, and reports the CSI measurement according to a measurement result at the current time. And the network side carries out scheduling according to the reported sub-band CSI. Because the UE only reports the CSI of the sub-band specified by the network side when the sub-band is triggered, and an interval exists between the CSI reported by the UE and the scheduling of the network side, the network side is likely to schedule the UE on a sub band with poor quality, and the transmission performance is likely to be reduced.
Disclosure of Invention
The embodiment of the application provides a method, a device and a terminal for reporting channel state information, which can solve the problem that a network side schedules UE on a subband with poor quality because the UE only reports CSI of the subband specified by the network side when the UE is triggered.
In a first aspect, a method for reporting channel state information is provided, where the method includes: the terminal measures CSI of N first sub-bands in a first time window, wherein the first time window comprises M time domain units, N is an integer larger than 1, and M is an integer larger than or equal to 1; selecting P second sub-bands from the N first sub-bands according to first CSI of the N first sub-bands measured in the first time window, wherein P is an integer which is greater than 0 and less than or equal to N; and reporting a CSI report, wherein the CSI report comprises second CSI corresponding to the P second sub-bands.
In a second aspect, an apparatus for reporting channel state information is provided, including: a measurement module, configured to measure CSI of N first subbands in a first time window, where the first time window includes M time domain units, where N is an integer greater than 1 and M is an integer greater than or equal to 1; a selecting module, configured to select P second subbands from the N first subbands according to first CSI of the N first subbands measured in the first time window, where P is an integer greater than 0 and less than or equal to N; and a reporting module, configured to report a CSI report, where the CSI report includes second CSI corresponding to the P second subbands.
In a third aspect, a terminal is provided, the terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect.
In a fourth aspect, a readable storage medium is provided, on which a program or instructions are stored, which when executed by a processor, implement the steps of the method according to the first aspect.
In a fifth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a terminal program or instructions to implement the steps of the method according to the first aspect.
In a sixth aspect, a computer program product is provided, comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method according to the first aspect.
In the embodiment of the application, the terminal measures the CSI of the multiple first subbands in the first time window, selects P second subbands from the N first subbands according to the first CSI of the multiple first subbands measured in the first time window, and reports the second CSI corresponding to the P second subbands. Therefore, the UE can select the proper P second sub-bands to report according to the first CSI of the N first sub-bands measured by the first time window, so that the network side can select to schedule the UE on the sub-band with better quality, and the transmission performance is improved.
Drawings
Fig. 1 shows a schematic diagram of a wireless communication system to which embodiments of the present application are applicable;
fig. 2 is a flowchart illustrating a method for reporting channel state information according to an embodiment of the present application;
fig. 3 is a schematic structural diagram illustrating a device for reporting channel state information according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;
fig. 5 shows a hardware structure diagram of a terminal according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" used herein generally refer to a class and do not limit the number of objects, for example, a first object can be one or more. In addition, "and/or" in the specification and claims means at least one of connected objects, and a character "/" generally means that the former and latter related objects are in an "or" relationship.
It is worth pointing out that the techniques described in the embodiments of the present application do notAn LTE-Advanced (LTE-a) system limited to Long Term Evolution (LTE)/LTE, and may also be used for other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, but the techniques may also be applied to applications other than NR system applications, such as generation 6 (6)thGeneration, 6G) communication system.
Fig. 1 shows a schematic diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a Transmit Receive Point (TRP), or some other suitable term in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.
The following describes in detail a reporting scheme of channel state information provided in the embodiments of the present application with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Fig. 2 is a flowchart illustrating a method for reporting channel state information in an embodiment of the present application, where the method 200 may be executed by a terminal. In other words, the method may be performed by software or hardware installed on the terminal. As shown in fig. 2, the method may include the following steps.
S210, a terminal measures CSI of N first sub-bands in a first time window, wherein the first time window comprises M time domain units, N is an integer larger than 1, and M is an integer larger than or equal to 1.
In the embodiment of the application, the terminal measures the CSI of a plurality of first subbands in a first time window comprising M time domain units.
In a specific application, when the terminal needs to report the CSI of the subband, the terminal may measure the CSI of the N first subbands in the first time window. For example, the terminal may measure N first subbands at time t, and obtain CSI measurement information of the N first subbands from time (t-t0) to time t, where the time (t-t0) to time t is a first time window, and t0 is a window length of the first time window.
In a possible implementation manner, the window length of the first time window may be indicated by DCI, for example, the network side indicates the window length of the first time window in DCI triggering CSI reporting, and the UE may determine the window length of the first time window according to the indication of DCI.
Alternatively, in another possible implementation manner, the window length of the first time window may also be configured by Radio Resource Control (RRC). For example, the network side may configure an offset (offset) by RRC, where the offset is relative to the CSI measurement time t or the CSI reporting time t1, and the offset may also be a CSI measurement reference interval. That is to say, in this possible implementation manner, according to RRC configuration, the terminal measures CSI of the N first subbands in a time window that is configured by the network side at the CSI measurement time t or the CSI reporting time t1 and is advanced by the offset or delayed by the offset.
Alternatively, in yet another possible implementation, the window length of the first time window may also be predefined, for example, a predefined CSI calculation time.
In a possible implementation manner, when the terminal measures CSI of N first subbands, types of measurements performed may be channel measurement, interference measurement, beam measurement, or multiple measurements in the above types, for example, channel measurement and beam measurement, or interference measurement and beam measurement, or channel measurement and interference measurement, or channel measurement, interference measurement, and beam measurement, which may be determined specifically according to practical applications, and are not limited in this embodiment of the application.
In this embodiment, the N first subbands may be all subbands of the terminal, or may be partial subbands of the terminal.
In one possible implementation manner, a CSI Reference Signal (CSI-RS) corresponding to each first subband may be triggered by DCI, for example, a network side indicates the CSI-RS in the DCI triggering CSI reporting.
Or, in another possible implementation manner, the CSI-RS corresponding to each first subband may also be determined by a CSI-RS associated with a CSI report. The network side can configure the association relationship between the CSI reports and the CSI-RS resources through RRC, wherein one CSI-RS resource can be associated with one or more CSI reports, and one CSI report can be associated with one or more CSI-RS resources. The terminal can acquire the CSI-RS resource associated with the CSI report according to the association relation, so that the CSI-RS corresponding to the first sub-band is determined.
S212, selecting P second subbands from the N first subbands according to the first CSI of the N first subbands measured in the first time window, where P is an integer greater than 0 and less than or equal to N.
In this embodiment, the terminal may select, according to the first CSI of the N first subbands measured by the first time window, P second subbands suitable for the N first subbands as the reported subbands. For example, the terminal may select P second subbands with the best or worst channel quality from the N first subbands, so that the network side schedules the UE to the subband with the best channel quality or avoids scheduling the UE to the subband with the worst channel quality. Alternatively, the terminal may also select N first subbands for reporting, that is, P ═ N.
And S213, reporting a CSI report, wherein the CSI report comprises second CSI corresponding to the P second sub-bands.
In this embodiment of the present application, the UE may directly report CSI, that is, the first CSI, of the P measured second subbands, or the UE may also calculate the CSI of the P measured second subbands, for example, for one subband, if the first time window performs multiple CSI measurements, the UE may calculate Channel Quality Indication (CQI) values obtained by multiple measurements, and report a mean value, a standard deviation, a variance, or the like of the CQI values of the second subbands obtained by multiple measurements.
Therefore, in the technical scheme provided by the embodiment of the application, when the terminal needs to report the CSI of the sub-bands, the terminal may determine the P corresponding second sub-bands according to the statistical information of the CSI corresponding to the N first sub-bands and/or the statistical information of the CSI corresponding to each measurement time. The terminal measures CSI of N first sub-bands at a first time (t) to obtain CSI of each first sub-band at the first time, and counts the CSI statistical information of each first sub-band measured at each measuring time from a second time (t-t0) to the first time (t). And the time window from the second moment to the first moment is the first time window. Optionally, the terminal may perform L measurements on the CSI of the N first subbands from the second time to the first time, that is, the CSI reported by the terminal and corresponding to the second subband may be statistical information of the CSI obtained by performing L measurements on the second subband. Optionally, one measurement time may correspond to one time domain unit described above.
According to the technical scheme provided by the embodiment of the application, the terminal measures the CSI of the multiple first subbands in the first time window, selects P second subbands from the N first subbands according to the first CSI of the multiple first subbands measured by the first time window, and reports the second CSI corresponding to the P second subbands. Therefore, the UE can select the proper P second sub-bands to report according to the first CSI of the N first sub-bands measured by the first time window, so that the network side can select to schedule the UE on the sub-band with better quality, and the transmission performance is improved.
In one possible implementation manner, the terminal may perform multiple measurements on the CSI of the N first subbands in the first time window, respectively. Thus, in this possible implementation, S210 may include: and the terminal measures the CSI of the N first sub-bands on L time domain units of the first time window, wherein L is an integer greater than or equal to 1 and less than or equal to M, and L is indicated by DCI or configured by RRC. In this possible implementation manner, in L time domain units, each time domain unit corresponds to one measurement time, and the UE performs measurement on CSI of L first subbands at each measurement time, so that L measurement results can be obtained for each first subband, and according to the L measurement results, the terminal can determine a channel variation condition of each first subband.
In the foregoing possible implementation manner, the time domain unit includes but is not limited to one of the following: a slot, a sub-slot, a symbol, or a predetermined plurality of symbols.
In the above possible implementation manner, the measured first CSI of the first subband may include, but is not limited to, the following three forms: in the embodiment of the present invention, the first CSI may include CQI values, and the second CSI corresponding to the second subband reported in S214 may include at least one of a mean value of CQI values measured for the second subband in the first time window, a variance of CQI values measured for the second subband in the first time window, and a standard deviation of CQI values measured for the second subband in the first time window.
In one possible implementation manner, in S212, the UE may calculate CQI information of each of the first subbands, and then select P second subbands from the N first subbands according to the CQI information of each of the first subbands. Wherein the CQI information comprises one of: the average value of all the CQI values obtained in the first time window, the variance of all the CQI values obtained in the first time window and the standard deviation of all the CQI values obtained in the first time window. That is to say, in this possible implementation manner, the UE performs statistics on the CQI of each first subband measured in the first time window to obtain CQI information of each first subband in the first time window, and selects P second subbands according to the CQI information of each first subband in the first time window.
In one possible implementation, the UE may use all the N first subbands as the second subband, that is, select to report the N first subbands. For example, assuming that the N first subbands include subbands 1-8, the UE performs CSI measurement on the subbands 1-8 at time t, and statistically calculates a CQI mean value of each subband in a time window of (t-t0) to t. And the UE reports the CQI mean value of each subband.
In another possible implementation manner, the UE may also select P subbands with the largest or smallest target CQI information from the N first subbands, where the target CQI information may include one of: mean value of CQI values, variance of CQI values, standard deviation of CQI values.
For example, for the N first subbands: the UE may select the respective subbands according to their CQIs (k 1 to N)mean(k) (i.e., the mean of the CQI values) in an order (ascending or descending order)) Selecting the largest or smallest CQImean(k) The corresponding P subbands are the P second subbands.
For example, assume that the N first subbands include: the sub bands 1-8 are sorted by the UE according to the CQI mean values (ascending or descending) corresponding to the sub bands 1-8, the sub bands with the CQI mean value at the top 2 (namely P-2) are sub band 3 and sub band 4, and the sub band 3 and the sub band 4 are taken as the second sub band by the UE.
For another example, for N first subbands subband (k is 1 to N), CQI for each subbandvariance(k) (i.e., standard deviation of CQI value) or CQIstd(k) (i.e., the variance of the CQI values) the N first subbands are sorted (in ascending or descending order) and the largest or smallest CQI is selectedvariance(k) Or CQIstd(k) The corresponding P subbands are the P second subbands.
For example, assume that the N first subbands include: and (5) the UE ranks the sub-bands 1-8 according to the CQI variances or standard deviations (ascending or descending) corresponding to the sub-bands 1-8, and if the sub-bands with the CQI variances or standard deviations ranked in the top 2 are sub-bands 3 and sub-bands 4, the UE takes the sub-bands 3 and sub-bands 4 as second sub-bands.
In another possible implementation manner, the UE may also select S subbands with the largest or smallest first target CQI information from the N first subbands, and then select P second target subbands with the largest or smallest second target CQI information from the S subbands, where S is an integer greater than 0, and N is greater than or equal to S ≧ P; wherein the first target CQI information includes: an average of the CQI values, the second target CQI information comprising: a variance of the CQI value or a standard deviation of the CQI value; or, the first target CQI information includes: a variance of the CQI value or a standard deviation of the CQI value, the second target CQI information including: mean of CQI values.
For example, for the N first subbands: sub-band (k 1 to N), and the UE performs CQI for each sub-bandmean(k) Sorting (ascending or descending) to select the largest or smallest CQImean(k) Corresponding to S subbands, and for subband m (m is 1 to S), CQI is addedvariance(m) sorting (ascending or descending) the CQI with the largest or smallest CQIvariance(m) P correspondingAnd subband is P second sub-bands.
For example, assuming that the N first subbands are subbands 1-8, the UE sorts (ascending or descending) the subbands 1-8 according to their corresponding CQI mean values, and the subbands with the CQI mean value in the first 4 bits are subbands 1,2,3 and 4. And the UE sorts (ascending or descending) the subbbands 1-4 according to the corresponding CQI variances or standard deviations, and if the subbbands with the CQI variances or standard deviations ranked in the first 2 bits are subbband 3 and subbband 4, the UE selects and reports the CQI mean values or the CQI variances or standard deviations of the subbband 3 and the subbband 4.
For example, for the N first subbands subband (k is 1 to N), the UE assigns CQI to each subband according to the subbandvariance(k) Sorting (ascending or descending) to select the maximum CQIvariance(k) For S subbands, the CQI for each subband is assigned to each subband m (m is 1 to S)mean(m) sorting to select the largest or smallest CQImean(m) corresponding P subbands, i.e., P second subbands.
For example, assuming that the N first subbands are subbands 1-8, the UE sorts (ascending or descending) the subbands 1-8 according to the corresponding CQI variances or standard deviations, and the subbands with the CQI variances or standard deviations in the first 4 bits are subbands 1,2,3 and 4. The UE sorts the sub-bands 1-4 according to the corresponding CQI mean values (ascending or descending), the sub-bands with the CQI mean values ranked at the top 2 are sub-band 3 and sub-band 4, and the UE selects and reports the CQI mean values or the CQI variances or the standard deviations of the sub-band 3 and the sub-band 4.
In yet another possible implementation manner, the UE may select P second subbands with the largest or smallest target value from the N first subbands, where the target value is (x × CQI)mean–y*CQIstd) Or (x CQI)mean+y*CQIstd) X and y are>Rational number of 0, CQImeanBeing the average of the CQI values, CQIstdIs the standard deviation of the CQI value. For example, each first sub-band is sorted (in ascending or descending order) according to its corresponding target value, and the P first sub-bands having the largest or smallest target values are selected as the second sub-bands.
For example, for N first subbands subband (k is 1 to N), the UE assigns each subband to each subband[CQImean(k)-CQIstd(k)]Sorting to select the maximum CQImean(k)-CQIstd(k)]Corresponding P subbands, i.e., P second subbands.
In the above possible implementation, x and y may be configured or predetermined on the network side.
In one possible implementation, when P second subbands are selected from the N first subbands according to the first CSI of the N first subbands measured in the first time window, the UE may rank, for each time domain unit in the L time domain units, the N first subbands according to a CQI value measured from large to small or from small to large; and then selecting the P second sub-bands meeting the preset condition from the N first sub-bands according to the arrangement sequence of the N first sub-bands in the L-time ordering.
Wherein the predetermined condition includes, but is not limited to, one of: the number of times that the CQI value is the maximum or minimum is the greatest; the ranking average is maximum or minimum.
For example, for N first subbands subband (k is 1 to N), each subband (k is 1 to N) is CQI-dependent for each measurement time tmean(k,t)Sorting is carried out to determine the maximum CQImeanCorresponding to suband. P maximum CQIs in the statistic time T1-TmeanThe largest number of subbands m (m is 1 to P), i.e., P second subbands.
For example, in the ranking of the respective measurement times shown in table 1, at the measurement times (i.e., time domain units) t1, t2, and t4, the CQI corresponding to subband 2 is the largest among all subbands, at the times t3 and t5, the CQI corresponding to subband 1 is the largest among all subbands, the largest times are subband 2 and subband 1, and the UE uses the subband 2 and the subband 1 as the second subband.
Table 1.
Measurement time t1 Measurement time t2 Measurement time t3 Measurement time t4 Measurement time t5
1 subband 2 subband 2 subband 1 subband 2 subband 1
2 subband 1 subband 3 subband 3 subband 4 subband 2
3 subband 3 subband 1 subband 2 subband 1 subband 4
4 subband 4 subband 4 subband 4 subband 3 subband 3
For another example, in table 1, the rank average value of subband 1 is (2+3+1+3+ 1)/5-2, the rank average value of subband 2 is (1+1+3+1+ 2)/5-1.4, the rank average value of subband 3 is (3+2+ 4+ 4)/5-3, the rank average value of subband 4 is (4+4+4+2+ 3)/5-3.4, the two subbands with the smallest rank average values are subband 2 and subband 1, and the UE uses subband 2 and subband 1 as the second subband.
According to the technical scheme provided by the embodiment of the application, the UE selects P second sub-bands from N first sub-bands according to the CSI of each first sub-band in L times of measurement in the first time window, and reports the mean value, standard deviation or variance of the CQI values of the P second sub-bands, so that the UE does not need to report the CSI of all sub-bands to the network side at every moment, the network side can also know the change condition of the channel, the scheduling efficiency is improved, and the increase of feedback overhead is avoided.
It should be noted that, in the method for reporting channel state information provided in this embodiment of the present application, the execution main body may be a device for reporting channel state information, or a control module in the device for reporting channel state information, which is used to execute the method for reporting channel state information. In the embodiment of the present application, a method for reporting channel state information performed by a reporting device of channel state information is taken as an example, and a reporting device of channel state information provided in the embodiment of the present application is described.
Fig. 3 is a schematic structural diagram of a device for reporting channel state information according to an embodiment of the present application, and as shown in fig. 3, the device 300 for reporting channel state information mainly includes: a measuring module 301, a selecting module 302 and a reporting module 303.
In this embodiment of the present application, the measurement module 301 is configured to measure CSI of N first subbands in a first time window, where the first time window includes M time domain units, where N is an integer greater than 1, and M is an integer greater than or equal to 1; a selecting module 302, configured to select P second subbands from the N first subbands according to first CSI, measured in the first time window, of the N first subbands, where P is an integer greater than 0 and less than or equal to N; a reporting module 303, configured to report a CSI report, where the CSI report includes second CSI corresponding to the P second subbands.
In one possible implementation, the measurement module 301 determines the length of the first time window according to at least one of:
a DCI indication;
RRC configuration;
and (4) defining in advance.
In one possible implementation manner, the measuring module 301 measures CSI of N first subbands in a first time window, including:
performing a type of measurement on the first sub-band of at least one of: channel measurements, interference measurements, and beam measurements.
In one possible implementation, the CSI reference signal corresponding to each first subband is triggered by DCI or determined by a CSI reference signal associated with the CSI report.
In one possible implementation, the measuring module 301 measures CSI of N first subbands in a first time window, including:
measuring CSI of the N first subbands on L time domain units of the first time window, wherein L is an integer greater than or equal to 1, and L is less than or equal to M, and L is indicated by DCI or configured by RRC.
In one possible implementation, the first CSI includes: a channel quality indication, CQI, value; the second CSI corresponding to the second subband comprises at least one of the following: the average value of all the CQI values measured by the second sub-band in the first time window, the variance of all the CQI values measured by the second sub-band in the first time window, and the standard deviation of all the CQI values measured by the second sub-band in the first time window.
In one possible implementation manner, the selecting module 302 selects P second subbands from the N first subbands according to the first CSI of the N first subbands measured in the first time window, including:
calculating CQI information for each of the first subbands, wherein the CQI information includes one of: obtaining a mean value of each CQI value obtained in the first time window, a variance of each CQI value obtained in the first time window, and a standard deviation of each CQI value obtained in the first time window;
and selecting P second sub-bands from N first sub-bands according to the CQI information of each first sub-band.
In a possible implementation manner, the selecting module 302 selects P second subbands from N first subbands according to CQI information of each first subband, including:
selecting the P second subbands from the N first subbands according to CQI information of each of the first subbands, where the P second subbands are P subbands with maximum or minimum target CQI information in the N first subbands, and the target CQI information includes one of: mean value of CQI values, variance of CQI values, standard deviation of CQI values.
In a possible implementation manner, the selecting module 302 selects P second subbands from N first subbands according to CQI information of each first subband, including:
selecting S sub-bands with the largest or smallest first target CQI information from the N first sub-bands according to the CQI information of each first sub-band, and then selecting P second target sub-bands with the largest or smallest second target CQI information from the S sub-bands, wherein S is an integer larger than 0, and N is larger than or equal to S and larger than or equal to P; wherein the first target CQI information includes: an average of the CQI values, the second target CQI information comprising: a variance of the CQI value or a standard deviation of the CQI value; or, the first target CQI information includes: a variance of the CQI value or a standard deviation of the CQI value, the second target CQI information including: average of CQI values.
In one possible implementation manner, the selecting module 302 selects P second subbands from N first subbands according to CQI information of each first subband, including:
selecting P second sub-bands with the maximum or minimum target value from the N first sub-bands according to the CQI information of each first sub-band, wherein the target value is (x CQI)mean–y*CQIstd) Or (x CQI)mean+y*CQIstd) X and y are>Rational number of 0, CQImeanBeing the average of the CQI values, CQIstdIs the standard deviation of the CQI value.
In one possible implementation, x and y are configured or predetermined on the network side.
In one possible implementation manner, the selecting module 302 selects P second subbands from the N first subbands according to the first CSI of the N first subbands measured in the first time window, including:
for each time domain unit in the L time domain units, sequencing the N first sub-bands according to the CQI value obtained by measurement from large to small or from small to large;
and selecting the P second sub-bands meeting a preset condition from the N first sub-bands according to the arrangement sequence of the N first sub-bands in the L-time ordering.
In one possible implementation, the predetermined condition includes one of:
the number of times that the CQI value is maximum or minimum is the largest;
the ranking average is maximum or minimum.
In one possible implementation, the time domain unit includes one of: a slot, a sub-slot, a symbol, or a predetermined plurality of symbols.
The reporting apparatus of the channel state information in this embodiment may be an apparatus, or may be a component, an integrated circuit, or a chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.
The reporting apparatus of the csi in the embodiment of the present application may be an apparatus having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The device for reporting channel state information provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effect, and is not described herein again to avoid repetition.
Optionally, as shown in fig. 4, an embodiment of the present application further provides a communication device 400, which includes a processor 401, a memory 402, and a program or an instruction stored in the memory 402 and capable of being executed on the processor 401, for example, when the communication device 400 is a terminal, the program or the instruction is executed by the processor 401 to implement each process of the above-mentioned method for reporting channel state information, and the same technical effect can be achieved, and details are not described here to avoid repetition.
Fig. 5 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.
The terminal 500 includes but is not limited to: a radio frequency unit 501, a network module 502, an audio output unit 503, an input unit 504, a sensor 505, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, a processor 510, and the like.
Those skilled in the art will appreciate that the terminal 500 may further include a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 510 via a power management system, so as to implement functions of managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 5 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or may combine some components, or may be arranged differently, and thus, the description thereof is omitted.
It should be understood that in the embodiment of the present application, the input Unit 504 may include a Graphics Processing Unit (GPU) 5041 and a microphone 5042, and the Graphics processor 5041 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 506 may include a display panel 5061, and the display panel 5061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 507 includes a touch panel 5071 and other input devices 5072. The touch panel 5071 is also called a touch screen. The touch panel 5071 may include two parts of a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in further detail herein.
In the embodiment of the present application, the radio frequency unit 501 receives downlink data from a network side device and then processes the downlink data in the processor 510; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 501 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The memory 509 may be used to store software programs or instructions as well as various data. The memory 509 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the memory 509 may include a high-speed random access memory, and may further include a nonvolatile memory, wherein the nonvolatile memory may be a Read-only memory (ROM), a programmable Read-only memory (PROM), an erasable programmable Read-only memory (erasabprom, EPROM), an electrically erasable programmable Read-only memory (EEPROM), or a flash memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
Processor 510 may include one or more processing units; alternatively, processor 510 may integrate an application processor, which primarily handles operating systems, user interfaces, and applications or instructions, etc., and a modem processor, which primarily handles wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 510.
Wherein, the processor 510 is configured to measure CSI of N first subbands in a first time window, where the first time window includes M time domain units, where N is an integer greater than 1 and M is an integer greater than or equal to 1; selecting P second sub-bands from the N first sub-bands according to first CSI of the N first sub-bands measured in the first time window, wherein P is an integer which is greater than 0 and less than or equal to N;
a radio frequency unit 501, configured to report a CSI report, where the CSI report includes P second CSI corresponding to the second subbands.
By the terminal provided by the embodiment of the application, the CSI of the plurality of first subbands can be measured in the first time window, P second subbands are selected from the N first subbands according to the first CSI of the plurality of first subbands measured in the first time window, and second CSI corresponding to the P second subbands is reported. Therefore, the appropriate P second sub-bands can be selected for reporting according to the first CSI of the N first sub-bands measured by the terminal in the first time window, so that the network side can select to schedule the UE on the sub-band with better quality, and the transmission performance is improved.
Optionally, the processor 510 is further configured to perform, on the first subband, a type of measurement of at least one of: channel measurements, interference measurements, and beam measurements.
Optionally, the processor 510 is further configured to measure CSI of the N first subbands in L time domain units of the first time window, where L is an integer greater than or equal to 1, and L is less than or equal to M, and L is indicated by DCI or configured by RRC.
Optionally, the processor 510 is further configured to calculate CQI information of each of the first subbands, where the CQI information includes one of: the mean value of all the CQI values obtained in the first time window, the variance of all the CQI values obtained in the first time window and the standard deviation of all the CQI values obtained in the first time window; and selecting P second sub-bands from N first sub-bands according to the CQI information of each first sub-band.
Optionally, the processor 510 is further configured to select, according to the CQI information of each of the first subbands, P second subbands from the N first subbands, where the P second subbands are P subbands with the largest or smallest target CQI information in the N first subbands, and the target CQI information includes one of: mean value of CQI values, variance of CQI values, standard deviation of CQI values.
Optionally, the processor 510 is further configured to select, according to the CQI information of each first subband, S subbands where first target CQI information is the largest or the smallest from the N first subbands, and then select, from the S subbands, P second target subbands where second target CQI information is the largest or the smallest, where S is an integer greater than 0, and N is greater than or equal to S and is greater than or equal to P; wherein the first target CQI information includes: an average of the CQI values, the second target CQI information comprising: a variance of the CQI value or a standard deviation of the CQI value; or, the first target CQI information includes: a variance of the CQI value or a standard deviation of the CQI value, the second target CQI information including: average of CQI values.
Optionally, the processor 510 is further configured to select P second subbands with a largest or smallest target value from the N first subbands according to the CQI information of each first subband, where the target value is (x × CQI)mean–y*CQIstd) Or (x CQI)mean+y*CQIstd) X and y are>Rational number of 0, CQImeanBeing the average of the CQI values, CQIstdIs the standard deviation of the CQI values.
Optionally, the processor 510 is further configured to, for each time domain unit in the L time domain units, rank the N first subbands according to a CQI value obtained through measurement from large to small or from small to large; and selecting the P second sub-bands meeting a preset condition from the N first sub-bands according to the arrangement sequence of the N first sub-bands in the L-time ordering.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned method for reporting channel state information, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a network-side device program or an instruction, so as to implement each process of the above method for reporting channel state information, and achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.
The embodiment of the present application further provides a computer program product, where the computer program product includes a processor, a memory, and a program or an instruction stored in the memory and capable of running on the processor, and when the program or the instruction is executed by the processor, the processes of the above method for reporting channel state information are implemented, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions recited, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (32)

1. A method for reporting channel state information is characterized in that the method comprises the following steps:
the method comprises the steps that a terminal measures Channel State Information (CSI) of N first sub-bands in a first time window, wherein the first time window comprises M time domain units, N is an integer larger than 1, and M is an integer larger than or equal to 1;
selecting P second sub-bands from the N first sub-bands according to first CSI of the N first sub-bands measured in the first time window, wherein P is an integer which is greater than 0 and less than or equal to N;
and reporting a CSI report, wherein the CSI report comprises second CSI corresponding to the P second sub-bands.
2. The method of claim 1, wherein the terminal measures CSI for the N first subbands in a first time window, comprising:
and the terminal measures the CSI of the N first subbands on L time domain units of the first time window, wherein L is an integer greater than or equal to 1 and less than or equal to M, and L is indicated by DCI or configured by RRC.
3. The method of claim 2,
the first CSI includes: a channel quality indication, CQI, value;
the second CSI corresponding to the second subband comprises at least one of the following: the average value of all the CQI values measured by the second sub-band in the first time window, the variance of all the CQI values measured by the second sub-band in the first time window, and the standard deviation of all the CQI values measured by the second sub-band in the first time window.
4. The method of claim 2, wherein selecting P second subbands from the N first subbands according to the first CSI measured for the N first subbands in the first time window comprises:
calculating CQI information for each of the first subbands, wherein the CQI information includes one of: the mean value of all the CQI values obtained in the first time window, the variance of all the CQI values obtained in the first time window and the standard deviation of all the CQI values obtained in the first time window;
and selecting P second sub-bands from N first sub-bands according to the CQI information of each first sub-band.
5. The method of claim 4, wherein selecting P second subbands from among the N first subbands according to the CQI information for each first subband comprises:
selecting the P second subbands from the N first subbands according to CQI information of each of the first subbands, where the P second subbands are P subbands with maximum or minimum target CQI information in the N first subbands, and the target CQI information includes one of: mean value of CQI values, variance of CQI values, standard deviation of CQI values.
6. The method of claim 4, wherein selecting P second subbands from among the N first subbands according to the CQI information for each first subband comprises:
selecting S sub-bands with the maximum or minimum first target CQI information from N first sub-bands according to the CQI information of each first sub-band, and then selecting P second target sub-bands with the maximum or minimum second target CQI information from the S sub-bands, wherein S is an integer greater than 0, and N is greater than or equal to S and is greater than or equal to P; wherein the first target CQI information includes: an average of the CQI values, the second target CQI information comprising: a variance of the CQI value or a standard deviation of the CQI value; or, the first target CQI information includes: a variance of the CQI value or a standard deviation of the CQI value, the second target CQI information including: mean of CQI values.
7. The method of claim 4, wherein selecting P second subbands from among the N first subbands according to the CQI information for each first subband comprises:
selecting P second sub-bands with the maximum or minimum target value from the N first sub-bands according to the CQI information of each first sub-band, wherein the target value is (x CQI)mean–y*CQIstd) Or (x CQI)mean+y*CQIstd) X and y are>Rational number of 0, CQImeanBeing the average of the CQI values, CQIstdIs the standard deviation of the CQI value.
8. The method of claim 7, wherein x and y are configured or predetermined on the network side.
9. The method of claim 2, wherein selecting P second subbands from the N first subbands according to the first CSI measured for the N first subbands in the first time window comprises:
for each time domain unit in the L time domain units, sequencing the N first sub-bands according to the CQI value obtained by measurement from large to small or from small to large;
and selecting the P second sub-bands meeting a preset condition from the N first sub-bands according to the arrangement sequence of the N first sub-bands in the L-time ordering.
10. The method of claim 9, wherein the predetermined condition comprises one of:
the number of times that the CQI value is maximum or minimum is the largest;
the ranking average is maximum or minimum.
11. The method of claim 2, wherein the time domain unit comprises one of: a slot, a sub-slot, a symbol, or a predetermined plurality of symbols.
12. The method according to any of claims 1 to 11, wherein the terminal determines the length of the first time window based on at least one of:
downlink control information DCI indication;
radio Resource Control (RRC) configuration;
and (4) defining in advance.
13. The method according to any of claims 1 to 11, wherein the terminal measures CSI for N first subbands in a first time window, comprising:
performing a type of measurement on the first sub-band of at least one of: channel measurements, interference measurements, and beam measurements.
14. The method according to any of claims 1 to 11, wherein the N first sub-bands comprise partial sub-bands of the terminal.
15. The method according to any of claims 1 to 11, characterized in that said N first subbands comprise all subbands of said terminal.
16. The method according to any of claims 1 to 11, wherein the CSI reference signal for each of the first subbands is triggered by DCI or determined by a CSI reference signal with which the CSI report is associated.
17. An apparatus for reporting channel state information, comprising:
a measurement module, configured to measure CSI of N first subbands in a first time window, where the first time window includes M time domain units, where N is an integer greater than 1 and M is an integer greater than or equal to 1;
a selecting module, configured to select P second subbands from the N first subbands according to first CSI, measured in the first time window, of the N first subbands, where P is an integer greater than 0 and less than or equal to N;
and a reporting module, configured to report a CSI report, where the CSI report includes second CSI corresponding to the P second subbands.
18. The apparatus of claim 17, wherein the means for measuring measures CSI for N first subbands in a first time window comprises:
measuring CSI of the N first subbands on L time-domain units of the first time window, wherein L is an integer greater than or equal to 1, L is less than or equal to M, and L is indicated by DCI or configured by RRC.
19. The apparatus of claim 18,
the first CSI includes: a channel quality indication, CQI, value;
the second CSI corresponding to the second subband comprises at least one of the following: the average value of all the CQI values measured by the second sub-band in the first time window, the variance of all the CQI values measured by the second sub-band in the first time window, and the standard deviation of all the CQI values measured by the second sub-band in the first time window.
20. The apparatus of claim 18, wherein the means for selecting P second subbands from the N first subbands according to the first CSI measured for the N first subbands in the first time window comprises:
calculating CQI information for each of the first subbands, wherein the CQI information includes one of: the mean value of all the CQI values obtained in the first time window, the variance of all the CQI values obtained in the first time window and the standard deviation of all the CQI values obtained in the first time window;
and selecting P second sub-bands from N first sub-bands according to the CQI information of each first sub-band.
21. The apparatus of claim 20, wherein the means for selecting P second subbands from the N first subbands according to CQI information for each of the first subbands comprises:
selecting the P second subbands from the N first subbands according to the CQI information of each of the first subbands, where the P second subbands are P subbands with maximum or minimum target CQI information in the N first subbands, and the target CQI information includes one of: mean value of CQI values, variance of CQI values, standard deviation of CQI values.
22. The apparatus of claim 20, wherein the means for selecting P second subbands from the N first subbands according to CQI information for each of the first subbands comprises:
selecting S sub-bands with the maximum or minimum first target CQI information from N first sub-bands according to the CQI information of each first sub-band, and then selecting P second target sub-bands with the maximum or minimum second target CQI information from the S sub-bands, wherein S is an integer greater than 0, and N is greater than or equal to S and is greater than or equal to P; wherein the first target CQI information includes: an average of the CQI values, the second target CQI information comprising: a variance of the CQI value or a standard deviation of the CQI value; or, the first target CQI information includes: a variance of the CQI value or a standard deviation of the CQI value, the second target CQI information including: average of CQI values.
23. The apparatus of claim 20, wherein the means for selecting P second subbands from the N first subbands according to CQI information for each of the first subbands comprises:
selecting P second sub-bands with the maximum or minimum target value from the N first sub-bands according to the CQI information of each first sub-band, wherein the target value is (x CQI)mean–y*CQIstd) Or (x CQI)mean+y*CQIstd) X and y are>Rational number of 0, CQImeanBeing the average of the CQI values, CQIstdIs the standard deviation of the CQI value.
24. The apparatus of claim 23, wherein x and y are configured or predetermined on a network side.
25. The apparatus of claim 18, wherein the means for selecting P second subbands from the N first subbands according to the first CSI measured for the N first subbands in the first time window comprises:
for each time domain unit in the L time domain units, sequencing the N first sub-bands according to the CQI value obtained by measurement from large to small or from small to large;
and selecting the P second sub-bands meeting a preset condition from the N first sub-bands according to the arrangement sequence of the N first sub-bands in the L-time ordering.
26. The apparatus of claim 25, wherein the predetermined condition comprises one of:
the number of times that the CQI value is maximum or minimum is the largest;
the ranking average is maximum or minimum.
27. The apparatus of claim 18, wherein the time domain unit comprises one of: a slot, a sub-slot, a symbol, or a predetermined plurality of symbols.
28. The apparatus of any one of claims 17 to 27, wherein the measurement module determines the length of the first time window based on at least one of:
downlink control information DCI indication;
radio Resource Control (RRC) configuration;
and (4) defining in advance.
29. The apparatus of any one of claims 17 to 27, wherein the means for measuring measures CSI for N first subbands in a first time window comprises:
performing a type of measurement on the first sub-band of at least one of: channel measurements, interference measurements, and beam measurements.
30. The apparatus according to any of claims 17 to 27, wherein the CSI reference signal for each of the first subbands is triggered by DCI or determined by a CSI reference signal with which the CSI report is associated.
31. A terminal, comprising a processor, a memory and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method for reporting channel state information according to any one of claims 1 to 16.
32. A readable storage medium, which stores a program or instructions, and the program or instructions when executed by the processor implement the steps of the method for reporting channel state information according to any one of claims 1 to 16.
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