Channel state information reporting method, device and terminal

Abstract

The present application discloses a method, device and terminal for reporting channel state information, which belongs to the field of wireless communication technology. The method for reporting channel state information includes: the terminal measures the CSI of N first subbands in a first time window, wherein the first time window includes M time domain units, wherein 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 subbands measured in the first time window, P second subbands are selected from the N first subbands, wherein P is an integer greater than 0 and less than or equal to N; and a CSI report is reported, wherein the CSI report includes the second CSI corresponding to the P second subbands.

Description

Technical Field

[0001] The present application belongs to the field of wireless communication technology, and specifically relates to a method, device and terminal for reporting channel state information. Background Art

[0002] Similar to the Long Term Evolution (LTE) system, the New Radio (NR) system also introduces a downlink aperiodic channel state information (CSI) reporting mechanism, that is, the base station can use the uplink scheduled downlink control information (DCI) to trigger the downlink CSI to be transmitted on the scheduled physical uplink shared channel (PUSCH) as needed. The base station can pre-configure an aperiodic trigger state list (Aperiodic Trigger State List) for the user equipment (UE) through radio resource control (RRC) signaling. Each state corresponds to an associated reporting configuration information list, and each reporting configuration information indicates how to report and which CSI reference signal (CSI-RS) resource set to use. In the uplink scheduled DCI, the "CSI request" field is used to specifically indicate which pre-configured aperiodic trigger state is actually triggered, and indicates that the corresponding CSI reporting information is carried on the PUSCH scheduled by the DCI.

[0003] In the related art, when the non-periodic trigger state is triggered, the UE performs CSI measurement on the subband indicated by the triggered non-periodic trigger state at the current moment, and reports it according to the measurement result at the current moment. The network side performs scheduling according to the reported subband CSI. Since the UE only reports the CSI of the subband specified by the network side when it is triggered, and there is a gap between the UE reporting CSI and the network side scheduling, it is likely that the network side will schedule the UE on a subband with poor quality, resulting in a decrease in transmission performance. Summary of the invention

[0004] The embodiments of the present application provide a method, device and terminal for reporting channel state information, which can solve the problem that the network side schedules the UE on a subband with poor quality because the UE only reports the CSI of the subband specified by the network side when it is triggered.

[0005] In a first aspect, a method for reporting channel state information is provided, the method comprising: a terminal measures CSI of N first subbands in a first time window, wherein the first time window includes M time domain units, wherein 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 subbands measured in the first time window, P second subbands are selected from the N first subbands, wherein P is an integer greater than 0 and less than or equal to N; and a CSI report is reported, wherein the CSI report includes second CSI corresponding to the P second subbands.

[0006] In a second aspect, a channel state information reporting device is provided, including: a measurement module, used to measure the CSI of N first subbands in a first time window, wherein the first time window includes M time domain units, wherein N is an integer greater than 1, and M is an integer greater than or equal to 1; a selection module, used to select P second subbands from the N first subbands based on the first CSI of the N first subbands measured in the first time window, wherein P is an integer greater than 0 and less than or equal to N; a reporting module, used to report a CSI report, wherein the CSI report includes second CSI corresponding to the P second subbands.

[0007] In a third aspect, a terminal is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0008] In a fourth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0009] In a fifth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a terminal program or instruction to implement the steps of the method described in the first aspect.

[0010] In a sixth aspect, a computer program product is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0011] In the embodiment of the present application, the terminal measures the CSI of multiple first subbands in the first time window, and selects P second subbands from 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. Thus, the UE can select the appropriate P second subbands to report according to the first CSI of the N first subbands measured in the first time window, so that the network side can choose to schedule the UE on a subband with better quality to improve the transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0013] Figure 2 A flow chart showing a method for reporting channel state information provided by an embodiment of the present application;

[0014] Figure 3 A schematic diagram showing the structure of a channel state information reporting device provided in an embodiment of the present application;

[0015] Figure 4 A schematic diagram showing the structure of a communication device provided in an embodiment of the present application is shown;

[0016] Figure 5 A schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0018] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0019] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in 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 technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.

[0020] Figure 1A schematic diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld 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 other terminal side devices, and the wearable device includes: a bracelet, a headset, glasses, etc. 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 can be a base station or a core network, wherein the base station can be referred to as 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 B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving 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. 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 the specific type of the base station is not limited.

[0021] The following is a detailed description of the channel state information reporting scheme provided in the embodiment of the present application through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0022] Figure 2 A flow chart of a method for reporting channel state information in an embodiment of the present application is shown. The method 200 can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal. Figure 2 As shown, the method may include the following steps.

[0023] S210, the terminal measures 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.

[0024] In this embodiment of the present application, the terminal measures CSI of multiple first subbands in a first time window including M time domain units.

[0025] In a specific application, the terminal may measure the CSI of the N first subbands within the first time window when the subband CSI needs to be reported. For example, the terminal may measure the N first subbands at time t, and obtain the CSI measurement information of the N first subbands from time (t-t0) to time t, where the time from time (t-t0) to time t is the first time window, and t0 is the window length of the first time window.

[0026] In one possible implementation, the window length of the first time window can be indicated by DCI. For example, the network side indicates the window length of the first time window in the DCI that triggers CSI reporting, and the UE can determine the window length of the first time window according to the indication of the DCI.

[0027] Alternatively, in another possible implementation, 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 through RRC, the offset being 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, in this possible implementation, the terminal measures the CSI of the N first subbands within a time window that is configured by the RRC configuration and is set forward by the offset or backward by the offset of the CSI measurement time t or the CSI reporting time t1 configured by the network side.

[0028] 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.

[0029] In one possible implementation, when the terminal measures the CSI of N first subbands, the type of measurement performed may be channel measurement, interference measurement, or beam measurement, or multiple measurements of the above types may be performed simultaneously, 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. The specific measurement may be determined based on the actual application and is not limited in the embodiments of the present application.

[0030] In the embodiment of the present application, the N first sub-bands may be all sub-bands of the terminal, or may be part of the sub-bands of the terminal.

[0031] In a possible implementation, 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 that triggers CSI reporting.

[0032] Alternatively, in another possible implementation, 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 may configure the association relationship between the CSI report and the CSI-RS resource through RRC, wherein one CSI-RS resource may be associated with one or more CSI reports, and one CSI report may be associated with one or more CSI-RS resources. Based on the association relationship, the terminal may obtain the CSI-RS resource associated with the CSI report, thereby determining the CSI-RS corresponding to the first subband.

[0033] S212: Select P second subbands from the N first subbands according to the first CSIs 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.

[0034] In an embodiment of the present application, the terminal may select appropriate P second subbands from the N first subbands as the subbands to be reported based on the first CSI of the N first subbands measured in 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. Alternatively, the terminal may also select N first subbands for reporting, that is, P=N.

[0035] S213: Report a CSI report, where the CSI report includes second CSIs corresponding to the P second subbands.

[0036] In an 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 also calculate the measured CSI of the P second subbands. For example, for one subband, if multiple CSI measurements are performed in the first time window, the UE may calculate the multiple measured channel quality indication (Channels Quality Indication, CQI) values, and report the mean, standard deviation or variance of the CQI values ​​of the second subband obtained by the multiple measurements.

[0037] It can be seen that in the technical solution provided in the embodiment of the present application, when the terminal needs to report the subband CSI, the terminal can 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 moment. Among them, the terminal measures the CSI of the N first subbands at the first moment (t), obtains the CSI of each of the first subbands at the first moment, and counts the statistical information of the CSI of each of the first subbands measured at each measurement moment from the second moment (t-t0) to the first moment (t). Among them, from the second moment to the first moment is the first time window. Optionally, the terminal can perform L measurements on the CSI of the N first subbands from the second moment to the first moment, that is, the CSI corresponding to the second subband reported by the terminal can be the statistical information of the CSI obtained by performing L measurements on the second subband. Optionally, one measurement moment can correspond to one of the above-mentioned time domain units.

[0038] Through the above technical solution provided by the embodiment of the present application, the terminal measures the CSI of multiple first subbands in the first time window, and selects P second subbands from N first subbands according to the first CSI of multiple first subbands measured in the first time window, and reports the second CSI corresponding to the P second subbands. Thus, the UE can select the appropriate P second subbands to report according to the first CSI of the N first subbands measured in the first time window, so that the network side can choose to schedule the UE on a subband with better quality, thereby improving the transmission performance.

[0039] In a possible implementation, within the first time window, the terminal may perform multiple measurements on the CSI of the N first subbands respectively. Therefore, in this possible implementation, S210 may include: the terminal measures the 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, and L is less than or equal to M, and L is indicated by DCI or configured by RRC. In this possible implementation, each of the L time domain units corresponds to a measurement moment, and the UE performs measurements on the CSI of the L first subbands at each measurement moment, so that L measurement results can be obtained for each first subband, and based on the L measurement results, the terminal can determine the channel change of each first subband.

[0040] In the above possible implementation manners, the time domain unit includes but is not limited to one of the following: a time slot, a sub-time slot, a symbol, or a predetermined plurality of symbols.

[0041] In the above possible implementation, the first CSI of the measured first subband may include, but is not limited to, the following three forms: Channel Quality Indication (CQI), Precoding Matrix Indicator (PMI), and Rank Indicator (RI). In the embodiment of the present application, optionally, the first CSI includes a CQI value. The second CSI corresponding to the second subband reported in S214 may include at least one of the following: the mean of each CQI value measured on the second subband within the first time window, the variance of each CQI value measured by the second subband within the first time window, and the standard deviation of each CQI value measured by the second subband within the first time window. Through this optional implementation, the mean, standard deviation or variance of the CQI value of the second subband is reported instead of the CQI value obtained by each measurement, which can reduce the amount of reported data and save uplink overhead.

[0042] In a possible implementation, in S212, the UE may calculate the CQI information of each of the first subbands, and then select P of the second subbands from the N first subbands according to the CQI information of each of the first subbands. The CQI information includes one of the following: the mean of each CQI value obtained in the first time window, the variance of each CQI value obtained in the first time window, and the standard deviation of each CQI value obtained in the first time window. That is, in this possible implementation, the UE performs statistics on the CQI of each first subband measured in the first time window to obtain the 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.

[0043] In a possible implementation, the UE may use all N first subbands as the second subband, that is, select to report N first subbands. For example, assuming that the N first subbands include subbands 1 to 8, the UE performs CSI measurement on subbands 1 to 8 at time t, and statistically calculates the CQI mean of each subband in the time window from (t-t0) to t. The UE reports the CQI mean of each subband.

[0044] In another possible implementation, the UE may also select P subbands with maximum or minimum target CQI information from the N first subbands, where the target CQI information may include one of the following: a mean of the CQI value, a variance of the CQI value, and a standard deviation of the CQI value.

[0045] For example, for N first subbands: subbandk (k=1-N), the UE may select each subband according to its CQI mean (k) (i.e., the mean of the CQI values) are sorted (in ascending or descending order) and the largest or smallest CQI is selected mean The P subbands corresponding to (k) are P second subbands.

[0046] For example, assuming that the N first subbands include: subbands 1 to 8, the UE sorts subbands 1 to 8 according to the CQI averages corresponding to subbands 1 to 8 (in ascending or descending order), and the subbands with the top 2 (i.e., P=2) CQI averages are subband 3 and subband 4, then the UE uses subband 3 and subband 4 as the second subband.

[0047] For another example, for N first subbands subbandk (k=1-N), according to the CQI of each subband variance (k) (i.e., standard deviation of CQI values) or CQI std (k) (i.e., the variance of the CQI value) sorts the N first subbands (in ascending or descending order) and selects the largest or smallest CQI variance (k) or CQI std The P subbands corresponding to (k) are P second subbands.

[0048] For example, assuming that the N first subbands include: subband 1 to 8, the UE sorts subband 1 to 8 according to the CQI variance or standard deviation corresponding to subband 1 to 8 (in ascending order or descending order), and the subbands with the top two CQI variance or standard deviation are subband 3 and subband 4, then the UE uses subband 3 and subband 4 as the second subband.

[0049] In another possible implementation, the UE may also select S subbands with the maximum or minimum first target CQI information from the N first subbands, and then select P second target subbands with the maximum or minimum second target CQI information from the S subbands, where S is an integer greater than 0 and N≥S≥P; wherein the first target CQI information includes: the mean of the CQI value, and the second target CQI information includes: the variance of the CQI value or the standard deviation of the CQI value; or, the first target CQI information includes: the variance of the CQI value or the standard deviation of the CQI value, and the second target CQI information includes: the mean of the CQI value.

[0050] For example, for N first subbands: subbandk (k=1-N), the UE allocates each subband according to its CQImean (k) Sort (ascending or descending) and select the largest or smallest CQI mean (k) corresponding to the S subbands, for subband m (m = 1 ~ S), CQI variance (m) Sort (ascending or descending) and select the largest or smallest CQI variance The P subbands corresponding to (m) are P second subbands.

[0051] For example, assuming that the N first subbands are subbands 1 to 8, the UE sorts subbands 1 to 8 according to their corresponding CQI means (in ascending or descending order), and the subbands with the top 4 CQI means are subbands 1, 2, 3, and subband 4. The UE sorts subbands 1 to 4 according to their corresponding CQI variances or standard deviations (in ascending or descending order), and the subbands with the top 2 CQI variances or standard deviations are subbands 3 and subband 4, then the UE chooses to report the CQI mean or CQI variance or standard deviation of subband 3 and subband 4.

[0052] For another example, for N first subbands subbandk (k=1-N), the UE allocates each subband according to its corresponding CQI variance (k) Sort (ascending or descending) and select the maximum CQI variance (k) The corresponding S subbands, for subband m (m = 1 ~ S), each subband is divided according to its CQI mean (m) Sort and select the largest or smallest CQI mean (m) corresponds to P subbands, that is, P second subbands.

[0053] For example, assuming that the N first subbands are subbands 1 to 8, the UE sorts subbands 1 to 8 according to the corresponding CQI variance or standard deviation (in ascending or descending order), and the subbands with the top 4 CQI variance or standard deviation are subbands 1, 2, 3, and subband 4. The UE sorts subbands 1 to 4 according to the corresponding CQI mean (in ascending or descending order), and the subbands with the top 2 CQI mean are subband 3 and subband 4, then the UE chooses to report the CQI mean or CQI variance or standard deviation of subband 3 and subband 4.

[0054] In 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*CQImean –y*CQI std ) or (x*CQI mean +y*CQI std ), x and y are rational numbers > 0, CQI mean is the mean of the CQI values, CQI std is the standard deviation of the CQI value. For example, each first subband is sorted (in ascending order or descending order) according to its corresponding target value, and P first subbands with the largest or smallest target value are selected as the second subbands.

[0055] For example, for N first subbands subbandk (k=1 to N), the UE allocates each subband according to its corresponding [CQI mean (k)-CQI std (k)] to sort and select the maximum [CQI mean (k)-CQI std (k)] corresponding to the P subbands, that is, P second subbands.

[0056] In the above possible implementations, x and y may be configured or predetermined on the network side.

[0057] In a possible implementation, when selecting P second subbands from N first subbands based on the first CSI of the N first subbands measured in the first time window, the UE can measure on each time domain unit in the L time domain units, and sort the N first subbands from large to small or from small to large according to the measured CQI values; and then select the P second subbands that meet the predetermined conditions from the N first subbands according to the arrangement order of the N first subbands in the L sortings.

[0058] The predetermined condition includes but is not limited to one of the following: the CQI value is the largest or the smallest the most times; the ranking average is the largest or the smallest.

[0059] For example, for N first subbands subbandk (k=1-N), at each measurement time t, each subband subbandk (k=1-N) is measured according to CQI mean(k,t) Sort and determine the maximum CQI mean The corresponding subband. The P maximum CQIs in the statistical time t = 1 ~ T mean The subband m (m=1 to P) with the largest number of times is P second subbands.

[0060] For example, in the order of the 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, and at times t3 and t5, the CQI corresponding to subband 1 is the largest among all subbands. Subband 2 and subband 1 have the largest number of maximum times, and the UE uses subband 2 and subband 1 as the second subband.

[0061] Table 1.

[0062] 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

[0063] For another example, in Table 1, the average ranking value of subband 1 is (2+3+1+3+1) / 5=2, the average ranking value of subband 2 is (1+1+3+1+2) / 5=1.4, the average ranking value of subband 3 is (3+2+2+4+4) / 5=3, and the average ranking value of subband 4 is (4+4+4+2+3) / 5=3.4. The two subbands with the smallest ranking average values ​​are subband 2 and subband 1, and the UE uses subband 2 and subband 1 as the second subband.

[0064] Through the technical solution provided by the embodiment of the present application, the UE selects P second subbands from N first subbands according to the CSI of each first subband in L measurements within the first time window, and reports the mean, standard deviation or variance of the CQI values ​​of the P second subbands, so that the UE does not need to report the CSI of all subbands to the network side at every moment, and the network side can also be aware of the channel changes, thereby improving the scheduling efficiency and avoiding increasing the feedback overhead.

[0065] It should be noted that the reporting method of channel state information provided in the embodiment of the present application can be executed by a reporting device for channel state information, or a control module in the reporting device for channel state information for executing the reporting method for channel state information. In the embodiment of the present application, the reporting method for channel state information executed by a reporting device for channel state information is taken as an example to illustrate the reporting device for channel state information provided in the embodiment of the present application.

[0066] Figure 3 A schematic diagram showing a structure of a channel state information reporting device provided in an embodiment of the present application is shown as follows: Figure 3 As shown, the channel state information reporting device 300 mainly includes: a measurement module 301, a selection module 302 and a reporting module 303.

[0067] In an embodiment of the present application, a measurement module 301 is used to measure the CSI of N first subbands in a first time window, wherein the first time window includes M time domain units, wherein N is an integer greater than 1, and M is an integer greater than or equal to 1; a selection module 302 is used to select P second subbands from the N first subbands based on the first CSI of the N first subbands measured in the first time window, wherein P is an integer greater than 0 and less than or equal to N; a reporting module 303 is used to report a CSI report, wherein the CSI report includes second CSI corresponding to the P second subbands.

[0068] In a possible implementation, the measuring module 301 determines the length of the first time window according to at least one of the following:

[0069] DCI indication;

[0070] RRC configuration;

[0071] Predefined.

[0072] In a possible implementation, the measuring module 301 measures the CSI of N first subbands in the first time window, including:

[0073] At least one of the following types of measurements are performed on the first subband: channel measurement, interference measurement, and beam measurement.

[0074] In a possible implementation manner, the CSI reference signal corresponding to each of the first subbands is triggered by DCI, or is determined by the CSI reference signal associated with the CSI report.

[0075] In a possible implementation, the measuring module 301 measures the CSI of N first subbands in the first time window, including:

[0076] The CSI of the N first subbands is measured on 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.

[0077] In one possible implementation, the first CSI includes: a channel quality indication CQI value; the second CSI corresponding to the second subband includes at least one of the following: a mean of each CQI value measured for the second subband within the first time window, a variance of each CQI value measured for the second subband within the first time window, and a standard deviation of each CQI value measured for the second subband within the first time window.

[0078] In a possible implementation, the selection module 302 selects P second subbands from N first subbands according to the first CSI of the N first subbands measured in the first time window, including:

[0079] Calculate CQI information of each of the first subbands, wherein the CQI information includes one of the following: a mean 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;

[0080] P second subbands are selected from N first subbands according to CQI information of each of the first subbands.

[0081] In a possible implementation manner, the selection module 302 selects P second subbands from N first subbands according to CQI information of each first subband, including:

[0082] According to the CQI information of each of the first subbands, the P second subbands are selected from the N first subbands, wherein the P second subbands are the P subbands with the largest or smallest target CQI information among the N first subbands, and the target CQI information includes one of the following: a mean of the CQI value, a variance of the CQI value, and a standard deviation of the CQI value.

[0083] In a possible implementation manner, the selection module 302 selects P second subbands from N first subbands according to CQI information of each first subband, including:

[0084] According to the CQI information of each of the first subbands, S subbands with the largest or smallest first target CQI information are selected from the N first subbands, and then P second target subbands with the largest or smallest second target CQI information are selected from the S subbands, wherein S is an integer greater than 0, and N≥S≥P; wherein the first target CQI information includes: a mean of the CQI value, and the second target CQI information includes: 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, and the second target CQI information includes: a mean of the CQI value.

[0085] In a possible implementation manner, the selection module 302 selects P second subbands from N first subbands according to CQI information of each first subband, including:

[0086] According to the CQI information of each of the first subbands, P second subbands with the largest or smallest target value are selected from the N first subbands, wherein the target value is (x*CQImean –y*CQI std ) or (x*CQI mean +y*CQI std ), x and y are rational numbers > 0, CQI mean is the mean of the CQI values, CQI std is the standard deviation of the CQI value.

[0087] In a possible implementation, x and y are configured or predetermined on the network side.

[0088] In a possible implementation, the selection module 302 selects P second subbands from N first subbands according to the first CSI of the N first subbands measured in the first time window, including:

[0089] For each of the L time domain units, the N first subbands are sorted according to the CQI values ​​obtained by measurement from large to small or from small to large;

[0090] According to the arrangement order of the N first sub-bands in the L-order sorting, the P second sub-bands that meet a predetermined condition are selected from the N first sub-bands.

[0091] In a possible implementation, the predetermined condition includes one of the following:

[0092] The CQI value is the maximum or minimum most often;

[0093] The ranking average is the largest or smallest.

[0094] In a possible implementation manner, the time domain unit includes one of the following: a time slot, a sub-time slot, a symbol, or a predetermined plurality of symbols.

[0095] The reporting device of the channel state information in the embodiment of the present application may be a device, or a component, an integrated circuit, or a chip in a terminal. The device may be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal may include but is not limited to the types of terminals 11 listed above, and the non-mobile terminal may be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0096] The channel state information reporting device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0097] The channel state information reporting device provided in the embodiment of the present application can achieve Figure 2 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0098] Optional, such as Figure 4 As shown, an embodiment of the present application also provides a communication device 400, including a processor 401, a memory 402, and a program or instruction stored in the memory 402 and executable on the processor 401. For example, when the communication device 400 is a terminal, the program or instruction is executed by the processor 401 to implement the various processes of the above-mentioned channel state information reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0099] Figure 5 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0100] 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.

[0101] Those skilled in the art will appreciate that the terminal 500 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 510 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 5 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0102] It should be understood that in the embodiment of the present application, the input unit 504 may include a graphics processor (Graphics Processing Unit, GPU) 5041 and a microphone 5042, and the graphics processor 5041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the 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, etc. 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: a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0103] In the embodiment of the present application, the radio frequency unit 501 receives downlink data from the network side device and sends it to the processor 510 for processing; in addition, the uplink data is sent to the network side device. Generally, 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, etc.

[0104] The memory 509 can be used to store software programs or instructions and various data. The memory 509 can mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 509 can include a high-speed random access memory, and can also include a non-volatile memory, wherein the non-volatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0105] The processor 510 may include one or more processing units; optionally, the processor 510 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs or instructions, etc., and the modem processor mainly processes wireless communications, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 510.

[0106] The processor 510 is configured to measure CSIs 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; select P second subbands from the N first subbands according to the first CSIs 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;

[0107] The radio frequency unit 501 is used to report a CSI report, wherein the CSI report includes second CSI corresponding to P second subbands.

[0108] Through the terminal provided by the embodiment of the present application, the CSI of multiple first subbands can be measured in the first time window, and P second subbands can be selected from N first subbands according to the first CSI of the multiple first subbands measured in the first time window, and the second CSI corresponding to the P second subbands can be reported. Therefore, according to the first CSI of the N first subbands measured by the terminal in the first time window, the appropriate P second subbands can be selected for reporting, so that the network side can choose to schedule the UE on a subband with better quality, thereby improving the transmission performance.

[0109] Optionally, the processor 510 is further configured to perform at least one of the following types of measurements on the first subband: channel measurement, interference measurement, and beam measurement.

[0110] Optionally, the processor 510 is further used to measure the 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, and L is less than or equal to M, and L is indicated by DCI or configured by RRC.

[0111] Optionally, the processor 510 is further used to calculate CQI information of each first subband, wherein the CQI information includes one of the following: a mean 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 select P second subbands from N first subbands based on the CQI information of each first subband.

[0112] Optionally, the processor 510 is further used to select the P second subbands from the N first subbands based on the CQI information of each of the first subbands, wherein the P second subbands are the P subbands with the maximum or minimum target CQI information among the N first subbands, and the target CQI information includes one of the following: the mean of the CQI value, the variance of the CQI value, and the standard deviation of the CQI value.

[0113] Optionally, the processor 510 is further used to select S subbands with the maximum or minimum first target CQI information from the N first subbands according to the CQI information of each of the first subbands, and then select P second target subbands with the maximum or minimum second target CQI information from the S subbands, wherein S is an integer greater than 0, and N≥S≥P; wherein the first target CQI information includes: the mean of the CQI value, and the second target CQI information includes: the variance of the CQI value or the standard deviation of the CQI value; or, the first target CQI information includes: the variance of the CQI value or the standard deviation of the CQI value, and the second target CQI information includes: the mean of the CQI value.

[0114] Optionally, the processor 510 is further configured to select P second subbands with the largest or smallest target value from the N first subbands according to the CQI information of each of the first subbands, wherein the target value is (x*CQI mean –y*CQI std ) or (x*CQI mean +y*CQI std ), x and y are rational numbers > 0, CQI mean is the mean of the CQI values, CQI std is the standard deviation of the CQI value.

[0115] Optionally, the processor 510 is further used to measure on each time domain unit in the L time domain units, and sort the N first subbands from large to small or from small to large according to the measured CQI values; and select the P second subbands that meet the predetermined conditions from the N first subbands according to the arrangement order of the N first subbands in the L sortings.

[0116] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned channel state information reporting method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0117] 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 computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0118] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a network-side device program or instruction to implement each process of the above-mentioned channel state information reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0119] An embodiment of the present application further provides a computer program product, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, each process of the above-mentioned channel state information reporting method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0120] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0121] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0122] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0123] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for reporting channel state information, characterized in that: The method includes: The terminal measures the channel state information 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 1; Selecting P second subbands from the N first subbands according to the first CSIs 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 the first CSI includes: a channel quality indication CQI value; Report a CSI report, wherein the CSI report includes second CSIs corresponding to P second subbands, and the second CSI corresponding to the second subband includes at least one of the following: a mean of each CQI value measured for the second subband in the first time window, a variance of each CQI value measured by the second subband in the first time window, and a standard deviation of each CQI value measured by the second subband in the first time window.

2. The method according to claim 1, characterized in that The terminal measures the CSI of N first subbands in the first time window, including: The terminal measures the 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, and L is less than or equal to M, and L is indicated by DCI or configured by RRC.

3. The method according to claim 2, characterized in that Selecting P second subbands from the N first subbands according to the first CSIs of the N first subbands measured in the first time window includes: Calculate CQI information of each of the first subbands, wherein the CQI information includes one of the following: a mean 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; P second subbands are selected from N first subbands according to CQI information of each of the first subbands.

4. The method according to claim 3, characterized in that Selecting P second subbands from N first subbands according to CQI information of each first subband includes: According to the CQI information of each of the first subbands, the P second subbands are selected from the N first subbands, wherein the P second subbands are the P subbands with the largest or smallest target CQI information among the N first subbands, and the target CQI information includes one of the following: a mean of the CQI value, a variance of the CQI value, and a standard deviation of the CQI value.

5. The method according to claim 3, characterized in that: Selecting P second subbands from N first subbands according to CQI information of each first subband includes: According to the CQI information of each of the first subbands, S subbands with the largest or smallest first target CQI information are selected from the N first subbands, and then P second target subbands with the largest or smallest second target CQI information are selected from the S subbands, wherein S is an integer greater than 0, and N≥S≥P; wherein the first target CQI information includes: a mean of the CQI value, and the second target CQI information includes: 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, and the second target CQI information includes: a mean of the CQI value.

6. The method according to claim 3, characterized in that Selecting P second subbands from N first subbands according to CQI information of each first subband includes: According to the CQI information of each of the first subbands, P second subbands with the largest or smallest target value are selected from the N first subbands, wherein the target value is (x*CQI mean –y*CQI std ) or (x*CQI mean +y*CQI std ), x and y are rational numbers > 0, CQI mean is the mean of the CQI values, CQI std is the standard deviation of the CQI value.

7. The method according to claim 6, characterized in that The x and y are configured or predetermined by the network side.

8. The method according to claim 2, characterized in that: Selecting P second subbands from the N first subbands according to the first CSIs of the N first subbands measured in the first time window includes: For each of the L time domain units, the N first subbands are sorted according to the CQI values ​​obtained by measurement from large to small or from small to large; According to the arrangement order of the N first sub-bands in the L-order sorting, the P second sub-bands that meet a predetermined condition are selected from the N first sub-bands.

9. The method according to claim 8, characterized in that The predetermined condition includes one of the following: The CQI value is the maximum or minimum most often; The ranking average is the largest or smallest.

10. The method according to claim 2, characterized in that The time domain unit includes one of the following: a time slot, a sub-time slot, a symbol, or a predetermined plurality of symbols.

11. The method according to any one of claims 1 to 10, characterized in that: The terminal determines the length of the first time window according to at least one of the following: Downlink control information DCI indication; Radio Resource Control RRC configuration; Predefined.

12. The method according to any one of claims 1 to 10, characterized in that: The terminal measures the CSI of N first subbands in the first time window, including: At least one of the following types of measurements are performed on the first subband: channel measurement, interference measurement, and beam measurement.

13. The method according to any one of claims 1 to 10, characterized in that: The N first sub-bands include part of the sub-bands of the terminal.

14. The method according to any one of claims 1 to 10, characterized in that: The N first sub-bands include all sub-bands of the terminal.

15. The method according to any one of claims 1 to 10, characterized in that The CSI reference signal corresponding to each of the first subbands is triggered by DCI, or is determined by the CSI reference signal associated with the CSI report.

16. A channel state information reporting device, characterized in that: include: a measurement module, configured to measure CSIs of N first subbands in a first time window, wherein the first time window includes M time domain units, wherein N is an integer greater than 1, and M is an integer greater than 1; A selection module is configured to select P second subbands from the N first subbands according to the first CSIs 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 the first CSI includes: a channel quality indication CQI value; A reporting module, used to report a CSI report, wherein the CSI report includes second CSIs corresponding to P second subbands, and the second CSI corresponding to the second subband includes at least one of the following: a mean of each CQI value measured for the second subband within the first time window, a variance of each CQI value measured by the second subband within the first time window, and a standard deviation of each CQI value measured by the second subband within the first time window.

17. The device according to claim 16, characterized in that The measuring module measures CSI of N first subbands in a first time window, including: The CSI of the N first subbands is measured on 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.

18. The device according to claim 17, characterized in that The selection module selects P second subbands from N first subbands according to the first CSIs of the N first subbands measured in the first time window, including: Calculate CQI information of each of the first subbands, wherein the CQI information includes one of the following: a mean 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; P second subbands are selected from N first subbands according to CQI information of each of the first subbands.

19. The device according to claim 18, characterized in that The selecting module selects P second subbands from N first subbands according to CQI information of each first subband, including: According to the CQI information of each of the first subbands, the P second subbands are selected from the N first subbands, wherein the P second subbands are the P subbands with the largest or smallest target CQI information among the N first subbands, and the target CQI information includes one of the following: a mean of the CQI value, a variance of the CQI value, and a standard deviation of the CQI value.

20. The device according to claim 18, characterized in that The selecting module selects P second subbands from N first subbands according to CQI information of each first subband, including: According to the CQI information of each of the first subbands, S subbands with the largest or smallest first target CQI information are selected from the N first subbands, and then P second target subbands with the largest or smallest second target CQI information are selected from the S subbands, wherein S is an integer greater than 0, and N≥S≥P; wherein the first target CQI information includes: a mean of the CQI value, and the second target CQI information includes: 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, and the second target CQI information includes: a mean of the CQI value.

21. The device according to claim 18, characterized in that The selecting module selects P second subbands from N first subbands according to CQI information of each first subband, including: According to the CQI information of each of the first subbands, P second subbands with the largest or smallest target value are selected from the N first subbands, wherein the target value is (x*CQI mean –y*CQI std ) or (x*CQI mean +y*CQI std ), x and y are rational numbers > 0, CQI mean is the mean of the CQI values, CQI std is the standard deviation of the CQI value.

22. The device according to claim 21, characterized in that The x and y are configured or predetermined by the network side.

23. The device according to claim 17, characterized in that The selection module selects P second subbands from N first subbands according to the first CSIs of the N first subbands measured in the first time window, including: For each of the L time domain units, the N first subbands are sorted according to the CQI values ​​obtained by measurement from large to small or from small to large; According to the arrangement order of the N first sub-bands in the L-order sorting, the P second sub-bands that meet a predetermined condition are selected from the N first sub-bands.

24. The device according to claim 23, characterized in that The predetermined condition includes one of the following: The CQI value is the maximum or minimum most often; The ranking average is the largest or smallest.

25. The device according to claim 17, characterized in that The time domain unit includes one of the following: a time slot, a sub-time slot, a symbol, or a predetermined plurality of symbols.

26. The device according to any one of claims 16 to 25, characterized in that The measuring module determines the length of the first time window according to at least one of the following: Downlink control information DCI indication; Radio Resource Control RRC configuration; Predefined.

27. The device according to any one of claims 16 to 25, characterized in that The measuring module measures CSI of N first subbands in a first time window, including: At least one of the following types of measurements are performed on the first subband: channel measurement, interference measurement, and beam measurement.

28. The device according to any one of claims 16 to 25, characterized in that The CSI reference signal corresponding to each of the first subbands is triggered by DCI, or is determined by the CSI reference signal associated with the CSI report.

29. A terminal, characterized in that: It includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the steps of the method for reporting channel state information as described in any one of claims 1 to 15 are implemented.

30. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the channel state information reporting method according to any one of claims 1 to 15 are implemented.

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