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CN114765483B - 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
CN114765483B
CN114765483B CN202110057998.9A CN202110057998A CN114765483B CN 114765483 B CN114765483 B CN 114765483B CN 202110057998 A CN202110057998 A CN 202110057998A CN 114765483 B CN114765483 B CN 114765483B
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cqi
sub
bands
subbands
csi
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CN114765483A (en
Inventor
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/CN114765483B/en
Priority to PCT/CN2022/071236 priority patent/WO2022152105A1/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 steps that 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, M is an integer larger than or equal to 1, P second sub-bands are selected from the N first sub-bands according to the N first sub-bands obtained through measurement in the first time window, P is an integer larger than 0 and smaller than or equal to N, and a CSI report is reported, wherein the CSI report comprises P second CSI corresponding to the second sub-bands.

Description

Method, device and terminal for reporting channel state information
Technical Field
The application belongs to the technical field of wireless communication, and particularly relates to a method, a device and a terminal for reporting channel state information.
Background
Similar to a long term evolution (Long Term Evolution, LTE) system, a downlink aperiodic CSI (CHANNEL STATE Information, CSI) reporting mechanism is also introduced in a New air interface (New Radio, NR) system, that is, a base station may use Uplink scheduled downlink control Information (Downlink Control Information, DCI) to trigger downlink CSI to be transmitted on a scheduled Physical Uplink shared channel (Physical Uplink SHARED CHANNEL, PUSCH) according to needs. The base station may pre-configure a non-periodic trigger status list (apidic TRIGGER STATE LIST) for a User Equipment (UE) through radio resource control (Radio Resource Control, RRC) signaling, each status corresponding to an associated list of reporting configuration information, each reporting configuration information indicating how to report and which sets of CSI reference signal (CSI REFERENCE SIGNAL, CSI-RS) resources to use. In the DCI of the uplink scheduling, a "CSI request" field is used to specifically indicate which preconfigured aperiodic trigger state is actually triggered, and indicate that corresponding CSI report information is carried on the PUSCH of the DCI scheduling.
In the related art, when the UE is triggered in the aperiodic trigger state, CSI measurement is performed on a subband (subband) indicated by the triggered aperiodic trigger state at the current time, and the CSI measurement is reported according to the measurement result at the current time. And the network side performs scheduling according to the reported subband CSI. Since the UE only reports CSI of the sub-band designated by the network side when triggered, and there is an interval between the reporting of CSI by the UE and the scheduling of the network side, it is likely to cause the network side to schedule the UE on a subband with poor quality, resulting in a decrease in transmission performance.
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 sub-band with poor quality because the UE only reports CSI of the sub-band appointed by the network side when triggered.
The first aspect provides a method for reporting channel state information, which comprises the steps that 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 greater than 1, M is an integer greater than or equal to 1, P second sub-bands are selected from the N first sub-bands according to the N first sub-bands obtained through measurement in the first time window, P is an integer greater than 0 and less than or equal to N, and a CSI report is reported, wherein the CSI report comprises P second CSI corresponding to the second sub-bands.
The second aspect provides a reporting device of channel state information, which comprises a measuring module and a reporting module, wherein the measuring module is used for measuring CSI of N first sub-bands in a first time window, the first time window comprises M time domain units, N is an integer greater than 1, M is an integer greater than or equal to 1, the selecting module is used for selecting P second sub-bands from the N first sub-bands according to the N first CSI of the N first sub-bands obtained through measurement in the first time window, P is an integer greater than 0 and less than or equal to N, and the reporting module is used for reporting a CSI report, wherein the CSI report comprises P second CSI corresponding to the second sub-bands.
In a third aspect, there is provided a terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the first aspect.
In a fourth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor perform 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 and the processor being coupled, the processor being for running a terminal program or instructions to implement the steps of the method according to the first aspect.
In a sixth aspect, there is provided a computer program product 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 the embodiment of the application, the terminal measures the CSI of a plurality of first sub-bands in a first time window, selects P second sub-bands from N first sub-bands according to the first CSI of the plurality of first sub-bands measured in the first time window, and reports the second CSI corresponding to the P second sub-bands. 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 shows a flowchart of a method for reporting channel state information according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a reporting device for channel state information according to an embodiment of the present application;
Fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;
Fig. 5 shows a schematic hardware structure of a terminal according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.
The terms first, second and the like in the description and in the claims, 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 sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.
It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a new air interface (NR) system for purposes of example and NR terminology is used in much of the description below, but these techniques may also be applied to applications other than NR system applications, such as a 6 th Generation (6G) communication system.
Fig. 1 shows a schematic diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be called a terminal device or a User Equipment (UE), and the terminal 11 may be a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a terminal-side device called a notebook Computer, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a palm Computer, a netbook, an ultra-Mobile Personal Computer (ultra-Mobile Personal Computer, UMPC), a Mobile internet device (Mobile INTERNET DEVICE, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), and the wearable device may include a bracelet, an earphone, a glasses, and the like. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network, where the base station may be called a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a Basic service set (Basic SERVICE SET, BSS), an Extended service set (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 transmission receiving point (TransmittingReceivingPoint, TRP), or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that, in the embodiment of the present application, only a base station in an NR system is taken as an example, but a specific type of the base station is not limited.
The following describes in detail, by means of specific embodiments and application scenarios thereof, a reporting scheme of channel state information provided by the embodiments of the present application with reference to the accompanying drawings.
Fig. 2 is a flow chart illustrating a method for reporting channel state information in an embodiment of the present application, and the method 200 may be performed 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, 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 greater than 1, and M is an integer greater 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 CSI of the subband needs to be reported, the terminal may measure CSI of N first subbands in a 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-t 0) to time t, where from time (t-t 0) to time t is a first time window, and t0 is a window length of the first time window.
In one possible implementation, 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 the DCI triggering CSI reporting, and the UE may determine the window length of the first time window according to the indication of the DCI.
Or in another possible implementation, the window length of the first time window may also be configured by the radio resource control (Radio Resource Control, RRC). For example, the network side may configure an offset (offset) by RRC, where the offset may be a CSI measurement reference interval with respect to CSI measurement time t or CSI reporting time t 1. That is, in this possible implementation manner, the terminal measures CSI of the N first subbands in a time window of forward advance offset or backward delay offset at the CSI measurement time t or the CSI report time t1 configured at the network side according to the RRC configuration.
Or in yet another possible implementation, the window length of the first time window may also be predefined, e.g. a predefined CSI calculation time.
In one possible implementation manner, when the terminal performs measurement on CSI of N first subbands, the type of measurement performed may be channel measurement, interference measurement, beam measurement, or multiple measurements in the foregoing types may be performed simultaneously, for example, channel measurement and beam measurement, interference measurement and beam measurement, or channel measurement and interference measurement, or channel measurement, interference measurement and beam measurement, which may be specifically determined according to practical applications, and embodiments of the present application are not limited.
In the embodiment of the present application, the N first subbands may be all subbands of the terminal, or may be part of the subbands of the terminal.
In one possible implementation manner, the CSI reference signal (CSI REFERENCE SIGNAL, CSI-RS) corresponding to each of the first subbands may be triggered by DCI, for example, the network side indicates the CSI-RS in the DCI triggering CSI reporting.
Or in another possible implementation manner, the CSI-RS corresponding to each of the first subbands may also be determined by the CSI-RS associated with the CSI report. The network side can configure association relation 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. And the terminal can acquire the CSI-RS resources associated with the CSI report according to the association relation, so as to determine the CSI-RS corresponding to the first sub-band.
S212, according to the first CSI of the N first sub-bands measured in the first time window, selecting P second sub-bands from the N first sub-bands, wherein P is an integer greater than 0 and less than or equal to N.
In the embodiment of the application, the terminal can select the proper P second sub-bands from the N first sub-bands as the reported sub-bands according to the first CSI of the N first sub-bands measured by the first time window. 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. Or the terminal may also select N first sub-bands to report, i.e., p=n.
S213, reporting a CSI report, wherein the CSI report comprises second CSI corresponding to the P second sub-bands.
In the embodiment of the present application, the UE may directly report the measured CSI of the P second subbands, that is, the first CSI, or the UE may calculate the measured CSI of the P second subbands, for example, for one subband, if the first time window performs multiple CSI measurements, the UE may calculate multiple measured channel quality indicator (Channels Quality Indication, CQI) values, and report the mean, standard deviation, or variance of the CQI values of the second subband obtained by multiple measurements.
It can be seen that, in the technical solution provided in the embodiment of the present application, when the terminal needs to report the CSI of the subbands, the terminal may determine the corresponding P second subbands according to the statistical information of the CSI corresponding to the N first subbands and/or the statistical information of the CSI corresponding to each measurement time. The terminal measures the CSI of N first sub-bands at a first time (t), obtains the CSI of each first sub-band at the first time, and counts the statistical information of the CSI of each first sub-band measured at each measuring time from a second time (t-t 0) to the first time (t). The first time window is from the second time to the first time. Optionally, from the second time to the first time, the terminal may perform L measurements on CSI of the N first subbands, that is, the CSI that the terminal reports to the terminal corresponding to the second subband may be statistical information of CSI obtained by performing L measurements on the second subband. Alternatively, 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 plurality of first sub-bands in the first time window, and according to the first CSI of the plurality of first sub-bands measured in the first time window, P second sub-bands are selected from N first sub-bands, and second CSI corresponding to the P second sub-bands is reported. 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, the terminal may perform multiple measurements on CSI of N first subbands, respectively, within a first time window. Thus, in this possible implementation, S210 may include the terminal measuring CSI for the N first subbands over 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. In this possible implementation manner, in the L time domain units, each time domain unit corresponds to one measurement time, and the UE performs measurement on CSI of the L first subbands at each measurement time, so that L measurement results may be obtained for each first subband, and according to the L measurement results, the terminal may determine a channel change condition of each first subband.
In a possible implementation, the time domain unit includes, but is not limited to, one of 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, three forms including, a channel quality indication (Channels Quality Indication, CQI), a precoding matrix indication ((Pre-coding Matrix Indicator, PMI), and a Rank Indicator (RI). In the embodiment of the present application, optionally, the first CSI includes a CQI value, 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, 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 a mean value of the respective CQI values obtained within the first time window, a variance of the respective CQI values obtained within the first time window, and a standard deviation of the respective CQI values obtained within the first time window. That is, in this possible implementation manner, the UE counts the CQI of each first subband measured in the first time window, so as 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 of the N first subbands as the second subbands, i.e., choose to report the N first subbands. For example, suppose that the N first subbands include subbands 1-8, the ue performs CSI measurement on subbands 1-8 at time t, and calculates a CQI average for each subband in a time window from (t-t 0) to (t) statistically. The UE reports the CQI average value of each subband.
In another possible implementation, 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 a mean value of CQI values, a variance of CQI values, and a standard deviation of CQI values.
For example, for N first subbands subbandk (k=1 to N), the UE may sort (in ascending or descending order) the subbands according to their CQIs mean (k) (i.e., the average of the CQI values), and select P subbands corresponding to the largest or smallest CQI mean (k), i.e., P second subbands.
For example, assuming that the N first subbands include subbands 1-8, the UE ranks the subbands 1-8 according to the average CQI values (in ascending or descending order) corresponding to the subbands 1-8, and the subbands with the average CQI values ranked in the first 2 (i.e., P=2) bits are subband 3 and subband 4, the UE takes subband 3 and subband 4 as the second subband.
For another example, for N first subbands subbandk (k=1 to N), the N first subbands are ordered (in ascending or descending order) according to CQI variance (k) (i.e., standard deviation of CQI values) or CQI std (k) (i.e., variance of CQI values) for each subband, and P subbands corresponding to the largest or smallest CQI variance (k) or CQI std (k), i.e., P second subbands, are selected.
For example, assuming that the N first subbands include subbands 1-8, the UE ranks the subbands 1-8 according to CQI variance or standard deviation (ascending or descending) corresponding to the subbands 1-8, and the subbands with the CQI variance or standard deviation ranked in the first 2 bits are subband 3 and subband 4, the UE takes the subband 3 and subband 4 as the second subband.
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 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+.s+.p, where the first target CQI information includes a mean value of CQI values, the second target CQI information includes a variance of CQI values or a standard deviation of CQI values, or the first target CQI information includes a variance of CQI values or a standard deviation of CQI values, and the second target CQI information includes a mean value of CQI values.
For example, for N first subbands subbandk (k=1 to N), the UE sorts (ascending or descending) the subbands according to their CQI mean (k), selects S subbands corresponding to the largest or smallest CQI mean (k), sorts (ascending or descending) CQI variance (m) for subbands m (m= 1~S), and selects P subbands corresponding to the largest or smallest CQI variance (m), i.e., P second subbands.
For example, suppose that the N first subbands are subbands 1-8, and the ue ranks (ascending or descending) the subbands 1-8 according to their corresponding CQI averages, with the first 4-bit subbands of the CQI average rank being subbands 1,2,3, and 4. And the UE ranks (ascending or descending) the CQI variances or standard deviations of the subbands 1-4 according to the corresponding CQI variances or standard deviations, and if the subbands with the CQI variances or standard deviations ranked in the first 2 bits are the subbands 3 and the subbands 4, the UE selects and reports the CQI mean value or the CQI variances or the standard deviations of the subbands 3 and the subbands 4.
For another example, for N first subbands subbandk (k=1 to N), the UE ranks (ascending or descending) the subbands according to their corresponding CQIs variance (k), selects S subbands corresponding to the maximum CQI variance (k), ranks (m= 1~S) the subbands according to their CQIs mean (m), and selects P subbands corresponding to the maximum or minimum CQI mean (m), i.e., P second subbands.
For example, assume that the N first subbands are subbands 1-8, and that the ue ranks (in ascending or descending order) the subbands 1-8 according to their corresponding CQI variances or standard deviations, with the CQI variances or standard deviations ranked in the first 4 bits being subbands 1,2,3, and 4. And the UE sorts the CQI average values of the sub-bands 1-4 (in ascending order or descending order) according to the corresponding CQI average values, wherein the sub-bands with the CQI average values being ranked in the first 2 bits are sub-band 3 and sub-band 4, and then the UE selects and reports the CQI average values or CQI variances or standard deviations of the sub-bands 3 and 4.
In yet another possible implementation, 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 numbers >0, CQI mean is a mean of CQI values, and CQI std is a standard deviation of CQI values. For example, each of the first subbands is ordered (in ascending or descending order) according to its corresponding target value, and P first subbands having the largest or smallest target value are selected as the second subbands.
For example, for N first subbands subbandk (k=1 to N), the UE sorts the subbands according to their corresponding [ CQI mean(k)-CQIstd (k) ] and selects P subbands corresponding to the maximum [ CQI mean(k)-CQIstd (k) ], i.e., P second subbands.
In the above possible implementations, x and y may be configured or predetermined at the network side.
In one possible implementation, when 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, the UE may rank the N first subbands from big to small or from big to big according to the measured CQI value for each of the L time domain units, and then select the P second subbands satisfying a predetermined condition from the N first subbands according to the rank order of the N first subbands in the L ranks.
Wherein the predetermined condition includes, but is not limited to, one of the maximum or minimum number of times that the CQI value is maximum and the maximum or minimum ranking average.
For example, for N first subbands subbandk (k=1 to N), for each measurement time t, the subbands subbandk (k=1 to N) are sorted according to CQI mean(k,t), and the subband corresponding to the maximum CQI mean is determined. In the statistical time t= 1~T, P maximum CQIs mean are the largest subbands m (m= 1~P), i.e., P second subbands.
For example, in the ordering of the measurement times shown in table 1, CQI corresponding to subband 2 is largest among all subbands at measurement times (i.e., time domain units) t1, t2, and t4, CQI corresponding to subband 1 is largest among all subbands at times t3 and t5, and the largest number of times is largest among subband 2 and subband 1, and ue uses subband 2 and subband 1 as the second subband.
Table 1.
Measuring time t1 Measuring time t2 Measuring time t3 Measuring time t4 Measuring 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 ranking average of subband 1 is (2+3+1+3+1)/5=2, the ranking average of subband 2 is (1+1+3+1+2)/5=1.4, the ranking average of subband 3 is (3+2+2+4)/5=3, the ranking average of subband 4 is (4+4+2+3)/5=3.4, the two subbands with the smallest ranking average 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, in the L-time measurement within the first time window, the UE selects P second sub-bands from N first sub-bands and reports the mean value, standard deviation or variance of 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 each moment, the network side can also acquire the change condition of the channel, the scheduling efficiency is improved, and the feedback overhead is avoided.
It should be noted that, in the method for reporting channel state information provided in the embodiment of the present application, the execution body may be a device for reporting channel state information, or a control module in the device for reporting channel state information, where the control module is used for executing the method for reporting channel state information. In the embodiment of the present application, a method for reporting channel state information by using a reporting device for channel state information is taken as an example, and the reporting device for channel state information provided by the embodiment of the present application is described.
Fig. 3 shows a schematic structural diagram of a reporting device for channel state information according to an embodiment of the present application, and as shown in fig. 3, the reporting device 300 for channel state information mainly includes a measurement module 301, a selection module 302, and a reporting module 303.
In the embodiment of the application, a 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, N is an integer greater than 1, M is an integer greater than or equal to 1, a selection module 302 is configured to select 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, and a reporting module 303 is configured to report CSI reports, where the CSI reports include P second CSI corresponding to the 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;
Predefined.
In one possible implementation, the measuring module 301 measures CSI of the N first subbands in a first time window, including:
at least one of channel measurement, interference measurement, and beam measurement types is performed on the first sub-band.
In one possible implementation, the CSI reference signal corresponding to each of the first subbands is triggered by DCI or determined by the CSI reference signal associated with the CSI report.
In one possible implementation, the measuring module 301 measures CSI of the N first subbands in a first time window, including:
And measuring 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, 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 comprises a channel quality indication CQI value, and the second CSI corresponding to the second sub-band comprises at least one of a mean value of each CQI value measured on the second sub-band in the first time window, a variance of each CQI value measured on the second sub-band in the first time window, and a standard deviation of each CQI value measured on the second sub-band in the first time window.
In one possible implementation, 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, where the selecting includes:
Calculating CQI information for each of the first subbands, wherein the CQI information includes one of a mean value of each CQI value obtained within the first time window, a variance of each CQI value obtained within the first time window, and a standard deviation of each CQI value obtained within the first time window;
And selecting P second sub-bands from N first sub-bands according to CQI information of each first sub-band.
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:
And selecting the P second sub-bands from the N first sub-bands according to the CQI information of each first sub-band, wherein the P second sub-bands are P sub-bands with the largest or smallest target CQI information in the N first sub-bands, and the target CQI information comprises one of a mean value of CQI values, a variance of the CQI values and a standard deviation of the 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:
And selecting S sub-bands with the largest or smallest first target CQI information from N first sub-bands according to the CQI information of each first sub-band, and 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 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 comprises a mean value of CQI values, the second target CQI information comprises a variance of CQI values or a standard deviation of CQI values, or the first target CQI information comprises a variance of CQI values or a standard deviation of CQI values, and the second target CQI information comprises a mean value 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:
And selecting P second subbands with the largest or smallest target value from N first subbands according to CQI information of each first subband, wherein the target value is (x-CQI mean–y*CQIstd) or (x-CQI mean+y*CQIstd), x and y are rational numbers of >0, CQI mean is the average value of CQI values, and CQI std is the standard deviation of the CQI values.
In one possible implementation, the x and y are configured or predetermined at the network side.
In one possible implementation, 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, where the selecting includes:
Sorting the N first subbands according to the CQI value measured from large to small or from small to large for measurement on each of the L time domain units;
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 orders.
In one possible implementation, the predetermined condition includes one of:
The number of times the CQI value is maximum or minimum is the greatest;
The ranking average is the largest or smallest.
In one possible implementation, the time domain unit comprises one of a slot, a sub-slot, a symbol, or a predetermined plurality of symbols.
The reporting device of the channel state information in the embodiment of the application can be a device, and can also be a component, an integrated circuit or a chip in the terminal. The device may be a mobile terminal or a non-mobile terminal. By way of example, mobile terminals may include, but are not limited to, the types of terminals 11 listed above, and non-mobile terminals may be servers, network attached storage (Network Attached Storage, NAS), personal computers (personal computer, PCs), televisions (TVs), teller machines, self-service machines, etc., and embodiments of the present application are not limited in particular.
The reporting device of the channel state information in the embodiment of the application can be a device with an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, and the embodiment of the present application is not limited specifically.
The reporting device for channel state information provided by the embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.
Optionally, as shown in fig. 4, the embodiment of the present application further provides a communication device 400, including a processor 401, a memory 402, and a program or an instruction stored in the memory 402 and capable of running 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 foregoing embodiment of the method for reporting channel state information, and the same technical effects can be achieved, so that repetition is avoided and redundant description is omitted herein.
Fig. 5 is a schematic diagram of a hardware structure of a terminal for implementing an 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, and a processor 510.
Those skilled in the art will appreciate that the terminal 500 may further include a power source (e.g., a battery) for powering the various components, and the power source may be logically coupled to the processor 510 via a power management system so as to perform functions such as 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 shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.
It should be appreciated that in embodiments of the present application, the input unit 504 may include a graphics processor (Graphics Processing Unit, GPU) 5041 and a microphone 5042, with the graphics processor 5041 processing image data of still pictures or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture 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. Touch panel 5071, also referred to as a touch screen. Touch panel 5071 may include two parts, 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, a joystick, and so forth, which are not described in detail herein.
In the embodiment of the present application, the radio frequency unit 501 receives downlink data from the network side device and processes the downlink data with the processor 510, and in addition, sends uplink data to the network side device. Typically, the 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, application programs or instructions (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 also include a nonvolatile memory, wherein the nonvolatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, 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, and optionally, processor 510 may integrate an application processor that primarily processes operating systems, user interfaces, and application programs or instructions, and a modem processor that primarily processes wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 510.
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, N is an integer greater than 1, and M is an integer greater than or equal to 1; according to the first CSI of the N first sub-bands measured in the first time window, selecting P second sub-bands from the N first sub-bands, wherein P is an integer greater than 0 and less than or equal to N;
the radio unit 501 is configured to report a CSI report, where the CSI report includes P second CSI corresponding to the second subbands.
Through the terminal provided by the embodiment of the application, the CSI of the plurality of first sub-bands can be measured in the first time window, and P second sub-bands are selected from N first sub-bands according to the first CSI of the plurality of first sub-bands obtained by measuring in the first time window, and the second CSI corresponding to the P second sub-bands 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 at least one of channel measurement, interference measurement, and beam measurement types on the first sub-band.
Optionally, the processor 510 is further configured to measure CSI of the N first subbands on L time domain units of the first time window, where 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.
Optionally, the processor 510 is further configured to calculate CQI information of each of the first subbands, where the CQI information includes one of 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 select P second subbands from the N first subbands according to the CQI information of each of the first subbands.
Optionally, the processor 510 is further configured to select the P second subbands from the N first subbands according to CQI information of each first subband, where the P second subbands are P subbands with maximum or minimum target CQI information in the N first subbands, where the target CQI information includes one of a mean value of CQI values, a variance of CQI values, and a standard deviation of CQI values.
Optionally, the processor 510 is further configured to select S subbands with the largest or smallest first target CQI information from the N first subbands according to the CQI information of each first subband, and 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 and equal to P, where the first target CQI information includes a mean value of CQI values, the second target CQI information includes a variance of CQI values or a standard deviation of CQI values, or the first target CQI information includes a variance of CQI values or a standard deviation of CQI values, and the second target CQI information includes a mean value of CQI values.
Optionally, the processor 510 is further configured to select, according to the CQI information of each first subband, 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 numbers >0, CQI mean is a mean value of CQI values, and CQI std is a standard deviation of CQI values.
Optionally, the processor 510 is further configured to sort the N first subbands according to the measured CQI value from large to small or from small to large for measurement on each of the L time domain units, and select the P second subbands satisfying a predetermined condition from the N first subbands according to the arrangement sequence of the N first subbands in the L sorts.
The embodiment of the application also provides a readable storage medium, and the readable storage medium stores a program or an instruction, which when executed by a processor, implements each process of the above-mentioned method embodiment for reporting channel state information, and can achieve the same technical effect, so that repetition is avoided, and no further description is provided herein.
Wherein the processor is a 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 (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.
The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a network side equipment program or instruction, each process of the embodiment of the method for reporting channel state information can be realized, the same technical effect can be achieved, and the repetition is avoided, and the description is omitted here.
The embodiment of the application further provides a computer program product, which comprises a processor, a memory, and a program or an instruction stored in the memory and capable of running on the processor, wherein when the program or the instruction is executed by the processor, the program or the instruction realizes each process of the above-mentioned reporting method embodiment of the channel state information, and can achieve the same technical effect, and for avoiding repetition, the description is omitted here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.
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 one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, 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.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims (30)

1. The method for reporting the channel state information is characterized by comprising 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 greater than 1, and M is an integer greater than 1;
selecting P second sub-bands from the N first sub-bands according to the first CSI of the N first sub-bands measured in the first time window, wherein P is an integer greater than 0 and less than or equal to N, and the first CSI comprises a channel quality indication CQI value;
Reporting a CSI report, wherein the CSI report comprises second CSI corresponding to P second sub-bands, and the second CSI corresponding to the second sub-bands comprises at least one of a mean value of each CQI value obtained by measuring the second sub-bands in the first time window, a variance of each CQI value obtained by measuring the second sub-bands in the first time window and a standard deviation of each CQI value obtained by measuring the second sub-bands in the first time window.
2. The method of claim 1, wherein the terminal measures CSI for N first subbands in a first time window, comprising:
the terminal measures CSI of the N first subbands over 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.
3. The method of claim 2, wherein selecting P second subbands from the N first subbands based on the first CSI for the N first subbands measured in the first time window comprises:
Calculating CQI information for each of the first subbands, wherein the CQI information includes one of a mean value of each CQI value obtained within the first time window, a variance of each CQI value obtained within the first time window, and a standard deviation of each CQI value obtained within the first time window;
And selecting P second sub-bands from N first sub-bands according to CQI information of each first sub-band.
4. A method according to claim 3, wherein selecting P of said second sub-bands from N of said first sub-bands based on CQI information for each of said first sub-bands comprises:
And selecting the P second sub-bands from the N first sub-bands according to the CQI information of each first sub-band, wherein the P second sub-bands are P sub-bands with the largest or smallest target CQI information in the N first sub-bands, and the target CQI information comprises one of a mean value of CQI values, a variance of the CQI values and a standard deviation of the CQI values.
5. A method according to claim 3, wherein selecting P of said second sub-bands from N of said first sub-bands based on CQI information for each of said first sub-bands comprises:
And selecting S sub-bands with the largest or smallest first target CQI information from N first sub-bands according to the CQI information of each first sub-band, and 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 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 comprises a mean value of CQI values, the second target CQI information comprises a variance of CQI values or a standard deviation of CQI values, or the first target CQI information comprises a variance of CQI values or a standard deviation of CQI values, and the second target CQI information comprises a mean value of CQI values.
6. A method according to claim 3, wherein selecting P of said second sub-bands from N of said first sub-bands based on CQI information for each of said first sub-bands comprises:
And selecting P second subbands with the largest or smallest target value from N first subbands according to CQI information of each first subband, wherein the target value is (x-CQI mean–y*CQIstd) or (x-CQI mean+y*CQIstd), x and y are rational numbers of >0, CQI mean is the average value of CQI values, and CQI std is the standard deviation of the CQI values.
7. The method of claim 6, wherein x and y are network side configured or predetermined.
8. The method of claim 2, wherein selecting P second subbands from the N first subbands based on the first CSI for the N first subbands measured in the first time window comprises:
Sorting the N first subbands according to the CQI value measured from large to small or from small to large for measurement on each of the L time domain units;
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 orders.
9. The method of claim 8, wherein the predetermined condition comprises one of:
The number of times the CQI value is maximum or minimum is the greatest;
The ranking average is the largest or smallest.
10. 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.
11. The method according to any of claims 1 to 10, 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;
Predefined.
12. The method according to any of claims 1 to 10, wherein the terminal measures CSI for N first subbands in a first time window, comprising:
at least one of channel measurement, interference measurement, and beam measurement types is performed on the first sub-band.
13. The method according to any of claims 1 to 10, wherein the N first subbands comprise part of the subbands of the terminal.
14. The method according to any of claims 1 to 10, wherein the N first subbands comprise all subbands of the terminal.
15. The method according to any of claims 1 to 10, wherein the CSI reference signal for each of the first subbands is triggered by DCI or determined by the CSI reference signal with which the CSI report is associated.
16. The device for reporting the channel state information is characterized by comprising the following components:
The measuring module is used for measuring 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 greater than 1, and M is an integer greater than 1;
A selection 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, where the first CSI includes a channel quality indicator CQI value;
And the reporting module is used for reporting a CSI report, wherein the CSI report comprises P second CSI corresponding to the second sub-bands, and the second CSI corresponding to the second sub-bands comprises at least one of a mean value of all CQI values obtained by measuring the second sub-bands in the first time window, a variance of all CQI values obtained by measuring the second sub-bands in the first time window and a standard deviation of all CQI values obtained by measuring the second sub-bands in the first time window.
17. The apparatus of claim 16, wherein the means for measuring measures CSI for N first subbands over a first time window, comprising:
And measuring 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, L is less than or equal to M, and L is indicated by DCI or configured by RRC.
18. The apparatus of claim 17, wherein the means for selecting selects P second subbands from the N first subbands based on the first CSI for the N first subbands measured over the first time window comprises:
Calculating CQI information for each of the first subbands, wherein the CQI information includes one of a mean value of each CQI value obtained within the first time window, a variance of each CQI value obtained within the first time window, and a standard deviation of each CQI value obtained within the first time window;
And selecting P second sub-bands from N first sub-bands according to CQI information of each first sub-band.
19. The apparatus of claim 18, wherein the means for selecting selects P second subbands from N first subbands based on CQI information for each first subband comprises:
And selecting the P second sub-bands from the N first sub-bands according to the CQI information of each first sub-band, wherein the P second sub-bands are P sub-bands with the largest or smallest target CQI information in the N first sub-bands, and the target CQI information comprises one of a mean value of CQI values, a variance of the CQI values and a standard deviation of the CQI values.
20. The apparatus of claim 18, wherein the means for selecting selects P second subbands from N first subbands based on CQI information for each first subband comprises:
And selecting S sub-bands with the largest or smallest first target CQI information from N first sub-bands according to the CQI information of each first sub-band, and 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 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 comprises a mean value of CQI values, the second target CQI information comprises a variance of CQI values or a standard deviation of CQI values, or the first target CQI information comprises a variance of CQI values or a standard deviation of CQI values, and the second target CQI information comprises a mean value of CQI values.
21. The apparatus of claim 18, wherein the means for selecting selects P second subbands from N first subbands based on CQI information for each first subband comprises:
And selecting P second subbands with the largest or smallest target value from N first subbands according to CQI information of each first subband, wherein the target value is (x-CQI mean–y*CQIstd) or (x-CQI mean+y*CQIstd), x and y are rational numbers of >0, CQI mean is the average value of CQI values, and CQI std is the standard deviation of the CQI values.
22. The apparatus of claim 21, wherein x and y are network side configured or predetermined.
23. The apparatus of claim 17, wherein the means for selecting selects P second subbands from the N first subbands based on the first CSI for the N first subbands measured over the first time window comprises:
Sorting the N first subbands according to the CQI value measured from large to small or from small to large for measurement on each of the L time domain units;
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 orders.
24. The apparatus of claim 23, wherein the predetermined condition comprises one of:
The number of times the CQI value is maximum or minimum is the greatest;
The ranking average is the largest or smallest.
25. The apparatus of claim 17, wherein the time domain unit comprises one of a slot, a sub-slot, a symbol, or a predetermined plurality of symbols.
26. The apparatus of any one of claims 16 to 25, 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;
Predefined.
27. The apparatus of any of claims 16 to 25, wherein the measurement module measures CSI for N first subbands over a first time window, comprising:
at least one of channel measurement, interference measurement, and beam measurement types is performed on the first sub-band.
28. The apparatus of any of claims 16 to 25, wherein the CSI reference signal for each of the first subbands is triggered by DCI or determined by a CSI reference signal associated with the CSI report.
29. A terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method for reporting channel state information as claimed in any one of claims 1 to 15.
30. A readable storage medium, wherein a program or instructions are stored on the readable storage medium, which when executed by a processor, implement the steps of the channel state information reporting method according to any one of claims 1 to 15.
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