CN116505993B

CN116505993B - Self-adaptive adjustment method, device and apparatus for rank indication and storage medium

Info

Publication number: CN116505993B
Application number: CN202310747631.9A
Authority: CN
Inventors: 吴泽楠; 李晓亮; 郝鹏; 刘大可
Original assignee: Polar Core Communication Technology Xi'an Co ltd; Jixin Communication Technology Nanjing Co ltd
Current assignee: Polar Core Communication Technology Xi'an Co ltd; Jixin Communication Technology Nanjing Co ltd
Priority date: 2023-06-25
Filing date: 2023-06-25
Publication date: 2023-10-24
Anticipated expiration: 2043-06-25
Also published as: CN116505993A

Abstract

The invention provides a self-adaptive adjustment method, equipment, a device and a storage medium for rank indication, which relate to the technical field of wireless communication networks, wherein the method comprises the following steps: based on the effective RI reported by the target terminal and the corresponding spectrum efficiency, determining the effective RI with the maximum spectrum efficiency as the scheduling RI; determining the scheduling RI with the largest scheduling times as a reference RI; determining a first set formed by the heuristic RI based on a preset heuristic RI condition and a scheduling RI adjacent to a reference RI; based on the first set, whether a heuristic flow is started is determined, and whether RI configuration information in aperiodic CSI reporting is updated by the target terminal is further determined according to the heuristic flow. Therefore, when the RI reported by the terminal is inaccurate, the base station adjusts the scheduling RI by sending the corresponding configuration information to the terminal, so as to update the modulation and coding strategy, increase the opportunity of adopting other RI to transmit and decode other RI, improve the success rate of demodulation and decoding, and reduce the error rate.

Description

Self-adaptive adjustment method, device and apparatus for rank indication and storage medium

Technical Field

The present invention relates to the field of wireless communication networks, and in particular, to a method, an apparatus, and a device for adaptively adjusting a rank indication, and a storage medium.

Background

In wireless mobile communications, such as the fourth generation mobile communications (the 4th generation mobile communication,4G) and the fifth generation mobile communications (the 5th generation mobile communication,5G), which are also referred to as long term evolution (Long Term Evolution, LTE) and New air interface (NR) systems, in a frequency division duplex (Frequency Division Duplexing, FDD) mode, a closed loop transmission mode is generally used for data transmission, that is, a receiving end device (e.g., a User Equipment (UE)) measures and estimates a current channel according to a Reference Signal (RS) transmitted by a transmitting end device (e.g., an access device such as a base station), obtains channel state information (Channel State Information, CSI), and feeds the obtained CSI back to the transmitting end device. The Channel State Information (CSI) comprises information such as channel quality indication (Channel Quantity Indicator, CQI), rank Indicator (RI), precoding codebook index (Precoding Matrix Indicator, PMI) and the like, the transmitting terminal equipment adjusts the current scheduling strategy based on the CSI fed back by the receiving terminal equipment, and the precoding codebook is selected, so that the performance of the receiving terminal can be improved, and the signal processing difficulty of the receiving terminal can be greatly reduced.

If the receiving end device estimates or measures the channel quality with errors, and the RI fed back by the receiving end device is inaccurate, the transmitting end device still adjusts the current scheduling policy according to the inaccurate RI, which may affect the transmission rate and stability of the wireless communication system, for example, the RI fed back by the receiving end is not matched with the current channel quality, and the modulation and coding policy (Modulation and Coding Scheme, MCS) determined according to the fed back RI is not suitable, so that the demodulation and decoding of the receiving end are failed, and further the stability and the transmission rate of the wireless communication system are affected.

Therefore, under the condition that the RI fed back by the receiving end device is inaccurate, how the transmitting end device selects the RI matching the current channel according to the counted RI fed back by the receiving end device, so as to realize the adaptive adjustment of the RI fed back by the receiving end device becomes a technical problem to be solved in the industry.

Disclosure of Invention

Aiming at the problems existing in the prior art, the invention provides a self-adaptive adjustment method, equipment and device for rank indication and a storage medium.

In a first aspect, the present invention provides a method for adaptively adjusting a rank indication, including:

based on the effective RI reported by the target terminal and the spectrum efficiency corresponding to each effective RI, determining the effective RI with the maximum spectrum efficiency as a scheduling RI; the target terminal is a terminal supporting aperiodic CSI reporting;

Determining the scheduling RI with the largest scheduling times as a reference RI;

determining a first set of heuristic RI corresponding to the reference RI based on preset heuristic RI conditions and scheduling RI adjacent to the reference RI;

and based on the first set, determining whether to start a heuristic flow, and further determining whether to update and configure RI configuration information in the aperiodic CSI reporting of the target terminal according to the heuristic flow.

Optionally, the determining, based on the preset tentative RI condition and the scheduling RI adjacent to the reference RI, the first set of tentative RIs corresponding to the reference RI includes:

determining a value of the reference RI;

determining an average value of corresponding spectrum efficiency when the scheduled total times of the target terminal reach a preset first threshold value, wherein the average value is used as a first average value;

if the value of the reference RI is the maximum value of the RI supported by the target terminal, determining whether the first-order scheduling RI adjacent to the reference RI is used as a heuristic RI based on whether the scheduling times of the first-order scheduling RI adjacent to the reference RI is smaller than a preset second threshold value and whether the first average value is smaller than a first high threshold value; the first high threshold determines the spectrum efficiency according to a spectrum efficiency mapping table, a first-order scheduling RI adjacent to the reference RI, and a maximum MCS corresponding to the first-order scheduling RI adjacent to the reference RI;

If the value of the reference RI is the minimum value of the RI supported by the target terminal, determining whether the first-order scheduling RI adjacent to the reference RI is used as a heuristic RI based on whether the scheduling times of the first-order scheduling RI adjacent to the reference RI is smaller than a preset second threshold value and whether the first average value is larger than a first low threshold value; the first low threshold determines spectrum efficiency according to a spectrum efficiency mapping table, a first-order scheduling RI adjacent to the reference RI, and a minimum MCS corresponding to the first-order scheduling RI adjacent to the reference RI;

if the value of the reference RI is other values of RI supported by the target terminal, determining whether to take the first scheduling RI as a heuristic RI based on whether the scheduling times of the first scheduling RI are smaller than a preset second threshold and whether the first average value is larger than a second low threshold; or determining whether to take the second scheduling RI as a heuristic RI based on whether the scheduling times of the second scheduling RI are smaller than a preset second threshold and whether the first average value is smaller than a second high threshold; the first scheduling RI and the second scheduling RI are respectively the scheduling RI with larger value in the two first-order scheduling RI adjacent to the reference RI, and the scheduling RI with smaller value in the two first-order scheduling RI adjacent to the reference RI; the second low threshold determines the spectrum efficiency according to the spectrum efficiency mapping table, the first scheduling RI and the minimum MCS corresponding to the first scheduling RI; the second high threshold determines the spectrum efficiency according to the spectrum efficiency mapping table, the second scheduling RI and the maximum MCS corresponding to the second scheduling RI;

The spectrum efficiency mapping table is used for representing spectrum efficiencies corresponding to different RI and different MCS under different coding modes.

Optionally, the determining, based on the effective RI reported by the target terminal and the spectrum efficiency corresponding to each effective RI, the effective RI with the largest spectrum efficiency includes:

sequentially obtaining effective RI reported by the target terminal in a preset sliding window for the preset sliding window moving unit time length; the preset sliding window comprises a plurality of unit time lengths, wherein the unit time lengths are average time lengths for reporting an effective RI by the target terminal;

acquiring Modulation and Coding Strategies (MCS) corresponding to each effective RI; the MCS corresponding to the effective RI is determined based on CQI associated with the effective RI and feedback information of the target terminal;

and determining the effective RI with the maximum spectrum efficiency as a scheduling RI based on the spectrum efficiency mapping table and the MCS corresponding to the effective RI.

Optionally, the determining whether to start a heuristic procedure based on the first set, and further determining whether to update RI configuration information configuring the target terminal for aperiodic CSI reporting according to the heuristic procedure includes:

determining the number of heuristic RI included in the first set as a first number;

If the first number is equal to 1, the heuristic RI is used as a final heuristic RI, and a heuristic flow is started;

if the first number is greater than or equal to 2, selecting one of the heuristic RI included in the first set as a final heuristic RI according to a preferential heuristic rule, and starting a heuristic flow;

the heuristic flow comprises:

if the limitation RI included in the first pre-configuration information is different from the final heuristic RI, updating the limitation RI included in the first pre-configuration information into the final heuristic RI; the first pre-configuration information is used for configuring the target terminal to report aperiodic CSI;

acquiring CSI which comprises the final heuristic RI and the MCS corresponding to the final heuristic RI and is reported by the target terminal in a non-period mode in the effective duration of the heuristic process based on the updated first pre-configuration information;

and determining whether to update the limitation RI included in the first preconfiguration information to the reference RI based on the total scheduling times of the final heuristic RI, the equivalent spectrum efficiency corresponding to the final heuristic RI and whether the average spectrum efficiency corresponding to the reference RI meets a preset indication updating condition.

Optionally, before acquiring, based on the updated first preconfiguration information, CSI reported by the target terminal including the final heuristic RI and MCS corresponding to the final heuristic RI in an effective duration of the heuristic procedure, the method includes:

Determining a maximum spectrum efficiency value based on all the scheduling RI and the spectrum efficiency corresponding to each scheduling RI, and taking the maximum spectrum efficiency value as a target spectrum efficiency;

determining the MCS which belongs to the final heuristic RI and is closest to the target spectral efficiency and is larger than the target spectral efficiency in a spectral efficiency mapping table as a target MCS;

at a first moment, updating an outer loop parameter for determining the MCS corresponding to the heuristic RI based on a preset outer loop updating rule, the target MCS, the MCS corresponding to the reference RI and the spectrum efficiency mapping table; the first time is the time when the final heuristic RI is included in the aperiodic CSI reporting result of the target terminal received for the first time within the effective duration of the heuristic flow;

acquiring all final heuristic RI between a first time and a second time and MCS corresponding to each final heuristic RI based on the updated outer loop parameters; and the second time is the termination time of the effective duration of the heuristic flow.

Optionally, the determining whether to update the limiting RI included in the first preconfiguration information to the reference RI based on the total number of times of scheduling of the final heuristic RI, the equivalent spectrum efficiency corresponding to the final heuristic RI, and whether the average spectrum efficiency corresponding to the reference RI meets a preset indication update condition includes:

Counting the occurrence times of all final heuristic RI between a first time and a second time as the scheduling total times;

determining the equivalent spectral efficiency of the final heuristic RI based on a spectral efficiency mapping table, all final heuristic RI between a first time and a second time and MCS corresponding to each final heuristic RI;

and if the total scheduling times are determined to be greater than or equal to a preset third threshold value and the equivalent spectrum efficiency of the final heuristic RI is smaller than the spectrum efficiency mean value corresponding to the reference RI, updating the limitation RI included in the first pre-configuration information into the reference RI.

Optionally, the spectrum efficiency mapping table is one selected from spectrum efficiency mapping tables corresponding to different coding modes when the target terminal accesses the base station.

In a second aspect, the present invention further provides an electronic device, including a memory, a transceiver, and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor configured to read a computer program in the memory and implement the method for adaptive adjustment of rank indication according to the first aspect as described above.

In a third aspect, the present invention further provides an adaptive adjustment apparatus for rank indication, including:

the scheduling rank indication module is used for determining the effective RI with the maximum spectrum efficiency as the scheduling RI based on the effective RI reported by the target terminal and the spectrum efficiency corresponding to each effective RI; the target terminal is a terminal supporting aperiodic CSI reporting;

a reference rank indication module, configured to determine the scheduling RI with the largest scheduling number as a reference RI;

the heuristic rank indication module is used for determining a first set formed by heuristic RI corresponding to the reference RI based on preset heuristic RI conditions and scheduling RI adjacent to the reference RI;

and the heuristic flow module is used for determining whether to start a heuristic flow based on the first set, and further determining whether to update and configure RI configuration information in the aperiodic CSI reporting of the target terminal according to the heuristic flow.

In a fourth aspect, the present invention also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for adaptive adjustment of rank indication as described in the first aspect above.

In a fifth aspect, the present invention also provides a computer program product comprising a computer program which, when executed by a processor, implements the method for adaptive adjustment of rank indication as described in the first aspect.

According to the self-adaptive adjustment method, device and storage medium for rank indication, the effective RI with the largest frequency spectrum efficiency reported by the target terminal is selected as the scheduling RI, the scheduling RI with the largest scheduling times is selected as the reference RI, the first set formed by the probing RI is determined in the scheduling RI adjacent to the reference RI based on the preset probing RI condition, whether the probing process is started or not is determined according to the first set, whether the target terminal needs to be updated or not is determined according to the probing process to carry out the configuration of the RI reported by the aperiodic CSI, and therefore the problem that the receiving terminal device reports the RI inaccurately is solved, the base station sends corresponding configuration information to the receiving terminal device to adjust the scheduling RI so as to update the modulation coding strategy, increase the opportunity of adopting other RI to transmit and decode other RI, improve the demodulation and decoding success rate and reduce the error rate.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of an adaptive adjustment method for rank indication according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of an implementation of an adaptive adjustment method for rank indication according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an adaptive adjustment apparatus for rank indication according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The following describes a method, apparatus, device and storage medium for adaptive adjustment of rank indication provided by the present invention with reference to fig. 1 to 4.

Fig. 1 is a flow chart of an adaptive adjustment method for rank indication according to an embodiment of the present invention, as shown in fig. 1, where the method includes:

Step 101, determining an effective rank indication RI with the maximum spectrum efficiency as a scheduling rank indication RI based on the effective rank indication RI reported by a target terminal and the spectrum efficiency corresponding to each effective rank indication RI; the target terminal is a terminal supporting reporting of aperiodic Channel State Information (CSI);

step 102, determining the scheduling rank indication RI with the largest scheduling times as a reference rank indication RI;

step 103, determining a first set composed of the heuristic rank indication RI corresponding to the reference rank indication RI based on a preset heuristic rank indication RI condition and a scheduling rank indication RI adjacent to the reference rank indication RI;

step 104, determining whether to start a probing process based on the first set, and further determining whether to update and configure rank indication RI configuration information in reporting aperiodic channel state information CSI of the target terminal according to the probing process.

Specifically, in a wireless mobile communication system, a receiving end device (for example, a user equipment UE) measures and estimates a current channel according to a reference signal RS transmitted by a transmitting end device (for example, an access device such as a base station) to obtain channel state information CSI, and feeds back the obtained CSI to the transmitting end device. The transmitting terminal equipment measures the current channel quality based on CQI in the fed-back CSI; selecting a precoding codebook based on a PMI in the fed-back CSI; the RI in the feedback CSI adjusts the current scheduling strategy (such as changing the transmission mode, adjusting the modulation and coding strategy MCS, etc.), so that the performance of the receiving end can be improved, and the signal processing difficulty of the receiving end can be greatly reduced.

The receiving end device measures and estimates the channel, and the result of obtaining the channel state information CSI may be inaccurate, if the transmitting end device (e.g., the access device such as the base station) still adjusts the scheduling policy according to the inaccurate CSI fed back by the receiving end device, or selects the corresponding modulation and coding policy MCS, it may result in that the selected MCS cannot match the current channel quality, and further, the demodulation and decoding of the receiving end fails, thereby affecting the stability and the transmission rate of the system.

The terminal supporting the aperiodic CSI reporting is selected as a target terminal, and the total scheduling frequency of the base station scheduling the target terminal is greater than or equal to a preset first threshold, where the preset first threshold can be determined according to practical application requirements, and in order to ensure accuracy of data at present, the pressure is not caused to subsequent calculation, and the value is usually 400 to 800, and if the processing capacity of the base station and/or the terminal is continuously improved, the corresponding preset first threshold can also be changed according to the processing capacity of the base station, and increased to a value matched with the processing capacity of the base station and/or the terminal, which may be the frequency in thousands or tens of thousands of units, or the exponential multiple is increased.

And dividing the whole time period under the condition that the total scheduling times of the target terminal meet a preset first threshold value into smaller time periods, counting the effective RI reported by the target terminal, wherein the time period T can be realized by a timer or a time window and the like by receiving the RI reported by the target terminal according to the time period T, and all the RI reported by the target terminal received in the time period corresponding to the timer is taken as the effective RI, or all the RI reported by the target terminal received in the time period corresponding to the time window is taken as the effective RI, the value of the time period T can be set to an initial value, and continuous adjustment is carried out in the follow-up counting process, so that the RI acquired in the time period T has timeliness, the RI acquired in the time period T can be simply understood to be more capable of reflecting the characteristic of a current channel, and the RI exceeding the time period T can be possibly changed because of the movement of a receiving terminal equipment or the channel condition of the receiving terminal equipment is not accurately reflected, therefore, the time period T is generally not set to be longer than a frame length which is as a time slot which is 10 or longer than a frame length which can be taken as a time slot which is equal to 10 or longer than a time slot length which can be 10. The time length corresponding to the timer and the time length corresponding to the time window are set according to the time length of the time T. And there may be multiple timers and time windows, where the interval between the start time of each timer is the duration of reporting one or more RIs by the target terminal (the duration of scheduling the target terminal by the base station one or more times), and similarly, the interval between the start time of each time window is the duration of reporting one or more RIs by the target terminal (the duration of scheduling the target terminal by the base station one or more times). In this way, all RIs reported by the terminal in the period T can be obtained as valid RIs in the form of the timer or the time window.

Further, the spectrum efficiency (Spectrum Effectiveness, SE) corresponding to each effective RI is determined by taking a time period T as a unit, and one effective RI with the largest frequency efficiency is selected as the scheduling RI. The above-mentioned one time period T is used as a unit, and the spectrum efficiency corresponding to each effective RI is determined, and then the effective RI with the highest spectrum efficiency is determined as the scheduling RI, and the following table 1 can be used in the initial stage:

TABLE 1

Wherein A1 to A8 represent values of the effective RI obtained in the period T, are arbitrary values in a range of values of RI supported by the target terminal, and any two or more of the values represented by A1 to A8 may be the same. The initial stage indicates that the target terminal just accesses the base station, and RI reported by the target terminal possibly acquired in the time period T cannot fill the time period T. And comparing the spectrum efficiency of each effective RI, and selecting one effective RI with the maximum spectrum efficiency as the scheduling RI.

After the target terminal accesses the base station for a period of time, determining the spectrum efficiency corresponding to each effective RI by taking a period of time T as a unit, and further determining the effective RI with the highest spectrum efficiency as the scheduling RI. The number of effective RI in each time period T is fixed, and the number of fixed values is determined according to the number of RI reported by the target terminal which can be included in the time period T.

After determining the scheduling RI in each time period T, based on the scheduling RI of which each scheduling RI is scheduled the most times as a reference RI, if there are a plurality of scheduling RIs of which the scheduling times are the most, one scheduling RI of which the value of RI is the smallest is selected as the reference RI.

Then, the scheduling RI adjacent to the reference RI is determined by centering on or taking the reference RI as a standard, and based on the preset heuristic RI condition, which scheduling RI or which scheduling RIs are used as the heuristic RI among the scheduling RIs adjacent to the reference RI, the selected heuristic RI may better match the current channel quality, and in particular, whether the heuristic RI better matches the current channel quality needs to be determined according to the subsequent heuristic flow.

The above-identified probe RIs may be none, one or more, and these probe RIs form the first set.

Whether to start a heuristic flow is determined according to whether the first set is empty or the number of elements in the first set. Specifically, in the case that the first set is empty, that is, the selected heuristic RI is empty according to the reference RI and the preset heuristic RI condition, that is, no scheduling RI that may be more matched with the current channel quality is found, and the heuristic flow does not need to be started. In case the first set is not empty, this means that a scheduling RI is found that may better match the current channel quality, requiring a heuristic flow to be initiated. The starting of the probing process needs to be performed based on the corresponding probing RI, that is, one or more elements in the first set need to be determined, that is, the number of probing RI is one or more, if there are a plurality of probing RI, one of the plurality of probing RI needs to be selected to perform the corresponding probing process, and whether the configuration of RI in the configuration information that the target terminal needs to update for aperiodic CSI reporting is determined through the probing process, that is, the configuration of RI in the configuration information that the current target terminal performs aperiodic CSI reporting is updated to the probing RI or the reference RI. Thereby enabling an adaptive adjustment of the rank indication of the receiving end device (user terminal).

According to the self-adaptive adjustment method for the rank indication, the effective RI with the largest frequency spectrum efficiency reported by the target terminal is selected as the scheduling RI, the scheduling RI with the largest scheduling times is selected as the reference RI, the first set formed by the probing RI is determined in the scheduling RI adjacent to the reference RI based on the preset probing RI condition, whether the probing process is started or not is determined according to the first set, whether the target terminal needs to be updated for the configuration of the RI reported by the aperiodic CSI is determined according to the probing process, and therefore the problem that the receiving terminal equipment reports the RI inaccurately is solved, the base station sends corresponding configuration information to the receiving terminal equipment for adjusting the scheduling RI, the modulation coding strategy is updated, the opportunity of adopting other RI to transmit and decode other RI is increased, the demodulating and decoding success rate is improved, and the error rate is reduced.

determining a value of the reference RI;

The spectrum efficiency mapping table is used for representing spectrum efficiencies corresponding to different RI and different MCS under different coding modes;

and the other values of the RI supported by the target terminal are the values except the maximum value and the minimum value in all the values of the RI supported by the target terminal.

Specifically, under the condition that the total scheduled times of the target terminal meet or reach a preset first threshold value, CSI information reported by the target terminal in each scheduling process is obtained, according to RI included in the CSI information, a base station determines MCS according to the CQI information included in the CSI information reported by the target terminal and feedback information of the target terminal, and a spectrum efficiency mapping table determined by the target terminal and the base station through signaling interaction in an access stage, corresponding spectrum efficiency is determined when the target terminal is scheduled each time, and then an average value, namely a first average value, of the corresponding spectrum efficiency is determined when the scheduled times of the target terminal reach the preset first threshold value. And the feedback information of the target terminal is information of whether the received signaling or data is correct or not after the target terminal receives the signaling or data from the base station, and the feedback information of the target terminal is used for the base station to determine the next operation.

In the process of determining the heuristic RI in the scheduling RI through the determined reference RI and the preset heuristic condition, the value of the reference RI and the range of RI supported by the target terminal may be determined first, and this range may include one or more RI values. The minimum value of RI supported by the target terminal is 1, the maximum value of RI supported by the target terminal is 4, and the other values of RI supported by the target terminal are 2 and 3. The preset heuristic condition is used for selecting a proper heuristic RI according to the reference RI.

Assuming that the initial value of the first set of heuristic RI is null, the elements in the first set are determined according to the following principle.

1. When reference ri=4

Because the reference ri=4 is the maximum value of the target terminal supporting RI, when the first-order scheduling RI adjacent to the reference ri=4 has only a value of 3, and when it is determined that the scheduling times of the scheduling ri=3 is smaller than the preset second threshold and the first average value is smaller than the first high threshold, the scheduling ri=3 is used as the probe RI, and the first set is added. The second threshold may be an initial value preset, where the initial value is related to the total scheduled number N of times the target terminal is scheduled, where k is possibly a positive number greater than zero and less than 1, and the initial value may be set to 0.1, and is adjusted according to practical situations. Further judging whether the first average value is smaller than a first high threshold. The first high threshold is the spectrum efficiency determined based on the scheduling ri=3 and the maximum MCS corresponding to the scheduling ri=3 in the spectrum efficiency mapping table, where the maximum MCS is the maximum index value of the MCS, and before determining, according to the spectrum efficiency mapping table, the spectrum efficiency corresponding to the maximum MCS when the scheduling ri=3 is determined, when the receiving end device (user terminal) accesses the base station, the corresponding coding mode is determined between the receiving end device (user terminal) and the base station, and then according to the spectrum efficiency mapping tables corresponding to different coding modes, the spectrum efficiency mapping table to be adopted by the target terminal is selected. The spectrum efficiency mapping table is used for representing the corresponding spectrum efficiency SE value when the terminal adopts different RI and different MCS under different coding modes, and the corresponding signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) value when the terminal adopts different RI and different MCS.

Different coding schemes here may include quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM), quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK), etc., where quadrature amplitude modulation QAM is more common 64QAM and 256QAM. The spectrum efficiency mapping table corresponding to different coding modes is a spectrum efficiency mapping table corresponding to a coding mode supported by the terminal at maximum, for example, a spectrum efficiency mapping table corresponding to a 64QAM coding mode represents a spectrum efficiency mapping table formed by spectrum efficiencies corresponding to different RI and different MSC in the case that the terminal supports 64QAM at maximum, and the spectrum efficiency mapping table corresponding to the 64QAM coding mode may be represented as shown in table 2:

TABLE 2

The first column of data in table 2 is determined according to the relevant rule of the MCS index table corresponding to the relevant physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) in the 64QAM coding scheme in the 3GPP protocol 38.214, the second column of data is determined by multiplying the first column of data by the RI value corresponding to the second column, and the subsequent arbitrary column, such as the nth column, is determined by multiplying the first column of data by the RI value corresponding to the nth column (ri=n), where the N value may be changed according to the maximum capability supported by the terminal or the base station, such as the maximum capability supported by the current terminal, for example, ri=4, and the spectrum efficiency map corresponding to the corresponding 64QAM coding scheme is shown in table 2, if the maximum capability supported by the terminal is improved, such as the maximum ri=n supported by the terminal, and N >4, the data in table 2 may be correspondingly updated, and of course, the corresponding 3GPP protocol 38.214 may also be updated, and the data in the first column of the table is determined based on the latest version of the 3GPP protocol 38.214.

Similarly, the spectrum efficiency mapping table corresponding to other coding modes can also be determined by adopting the mode. Such as a spectrum efficiency mapping table corresponding to a 256QAM encoding scheme, a spectrum efficiency mapping table corresponding to a 1024QAM encoding scheme, etc.

In table 2, SE represents spectral efficiency Spectral efficiency.

2. When reference ri=1

And when the scheduling times of the scheduling RI=2 are less than a preset second threshold value and the first average value is greater than a first low threshold value, taking the scheduling RI=2 as a heuristic RI, and adding the heuristic RI into a first set. The value of the second threshold is the same as that of the reference ri=4. The first low threshold is a spectrum efficiency determined based on the scheduling ri=2 and a minimum MCS corresponding to the scheduling ri=2 in the spectrum efficiency mapping table, and the minimum MCS is the minimum index value of the MCS. Likewise, the average value of the spectrum efficiency of the schedule ri=2 can be determined with reference to the method adopted in the case of the reference ri=4.

3. When reference ri=2

When the scheduling ri=3, that is, when the scheduling RI is the first scheduling RI, it is determined that the number of times of scheduling ri=3 is smaller than a preset second threshold, and when the first average value is greater than a second lower threshold when the scheduling ri=3, the scheduling ri=3 is used as a probe RI, and the first set is added. And when the second low threshold is set, determining the spectrum efficiency according to the scheduling ri=3 and the scheduling ri=3 corresponding to the minimum MCS in the spectrum efficiency mapping table.

When the scheduling ri=1, that is, when the scheduling RI is the second scheduling RI, it is determined that the scheduling times of the scheduling ri=1 is smaller than a preset second threshold, and the first average value is smaller than a second high threshold when the scheduling ri=1, the scheduling ri=1 is used as the probe RI, and the first set is added. And when the second high threshold is set, determining the spectrum efficiency according to the scheduling ri=1 and the corresponding maximum MCS of the scheduling ri=1 in the spectrum efficiency mapping table.

4. When reference ri=3

When the scheduling ri=4, that is, when the scheduling RI is the first scheduling RI, it is determined that the number of times of scheduling ri=4 is smaller than a preset second threshold, and the first average value is greater than a second lower threshold when the scheduling ri=4, the scheduling ri=4 is used as the probe RI, and the first set is added. And when the second low threshold is set, determining the spectrum efficiency according to the scheduling ri=4 and the scheduling ri=4 corresponding to the minimum MCS in the spectrum efficiency mapping table.

When the scheduling ri=2, that is, when the scheduling RI is the second scheduling RI, it is determined that the scheduling number of times of the scheduling ri=2 is smaller than a preset second threshold, and the first average value is smaller than a second high threshold when the scheduling ri=2, the scheduling ri=2 is used as the probe RI, and the first set is added. And when the second high threshold is set, determining the spectrum efficiency according to the scheduling ri=2 and the corresponding maximum MCS of the scheduling ri=2 in the spectrum efficiency mapping table.

Through the preset heuristic RI condition, the reference RI can be used as the center, and the scheduling RI meeting the preset heuristic RI condition is selected from the first-order scheduling RI adjacent to the reference RI as the heuristic RI, the heuristic RI can be more matched with the current channel quality, and the opportunity of adopting other RI for transmission is increased for the transmitting terminal equipment (base station); for the receiving end device (user terminal), the opportunity to decode other RI is increased, and the success rate of demodulation and decoding is increased.

Specifically, when the total scheduled time of the target terminal is greater than or equal to a preset first threshold value, all pieces of CSI information reported by the target terminal are obtained, wherein the pieces of CSI information comprise information such as a rank indication RI, a channel quality indication CQI, a precoding codebook index PMI and the like. Specifically, the effective RI reported by the target terminal in the preset sliding window can be obtained by sliding the preset sliding window for one unit time; the preset sliding window comprises a plurality of unit time lengths, wherein the unit time lengths are average time lengths for reporting an effective RI to the target terminal or average time lengths for the target terminal to be scheduled once. The average time length of the target terminal scheduled once indicates the total time length of the target terminal for receiving the scheduling of the base station and reporting the corresponding CSI information.

Before the target terminal reports the CSI information, the target terminal and the base station have determined the adopted coding mode and the spectrum efficiency mapping table corresponding to the coding mode, namely the adopted spectrum efficiency mapping table, through signaling interaction in the access stage. The coding scheme here is mainly a coding scheme corresponding to the downlink channel.

In this way, in the preset sliding window, the base station receives the RI included in the CSI information reported by the target terminal, that is, the effective RI, the CSI information further includes CQI information, feedback information of the target terminal is obtained, and the MCS corresponding to the effective RI is determined according to the CQI information in the CSI information reported by the target terminal and the feedback information of the target terminal, and further, a spectrum efficiency mapping table is searched to determine spectrum efficiency corresponding to a combination of each effective RI and the MCS corresponding to the effective RI, and then, the effective RI and the MCS combination with the largest spectrum efficiency are selected in the combination, that is, the determined effective RI with the largest spectrum efficiency is used as the scheduling RI. And the feedback information of the target terminal is information of whether the received signaling or data is correct or not after the target terminal receives the signaling or data from the base station, and the feedback information of the target terminal is used for the base station to determine the next operation.

And moving the preset sliding window for a unit time, repeating the steps again to obtain the effective RI in the next preset sliding window time, and further determining the scheduling RI in the preset sliding window time.

Of course, the above schematic description mainly realizes the determination of the scheduling RI in a preset sliding window manner, and in practical application, the determination may also be realized in a timer manner, and a plurality of timers may be correspondingly required to be set, where the starting time difference between adjacent timers is one unit duration of the preset sliding window, the total duration of the timers is the total number of unit durations included in the preset sliding window, and if the total number of unit durations included in the preset sliding window is S, the number of corresponding timers is greater than or equal to S, so that the timer may also realize the function of the preset sliding window.

the heuristic flow comprises:

Specifically, after the first set including the tentative RIs is determined according to the above method, the number of elements included in the first set, that is, the number of tentative RIs is determined as the first number.

When the first number is 0, it indicates that the first set is empty, that is, the reference RI is determined, and in the process of determining the tentative RI in the first-order scheduled RIs adjacent to the reference RI, there is no scheduled RI satisfying the preset tentative RI condition, so there is no scheduled RI selected from the first-order scheduled RIs adjacent to the reference RI to obtain the scheduled RI satisfying the preset tentative RI condition.

When the first number is 1, it indicates that only one element in the first set is included, that is, only one scheduling RI satisfies the preset tentative RI condition in determining tentative RIs in the first-order scheduling RIs adjacent to the reference RI. Thus, the heuristic flow is initiated with the heuristic RI as the final heuristic RI.

When the first number is a value greater than or equal to 2, which indicates that the elements in the first set are greater than or equal to two, one of these heuristic RI is selected as the final heuristic RI, and a heuristic flow is started. The method for selecting one of the plurality of heuristic RI as the final heuristic RI may use a heuristic direction counter, where any element in the heuristic set appears once, the heuristic direction counter is incremented by 1, and determines the final heuristic RI according to the result of the heuristic direction counter modulo 2, determines the heuristic RI with a larger value as the final heuristic RI when the result of modulo 2 is even, and determines the heuristic RI with a smaller value as the final heuristic RI when the result of modulo 2 is odd. Either it is determined which heuristic RI occurs the most often as the final heuristic RI or it is randomly selected as the final heuristic RI.

In the case of the heuristic RI, a heuristic procedure is started, which specifically includes:

determining whether the limitation RI included in the first pre-configuration information of the base station is the same as the final heuristic RI, namely determining whether the values of the limitation RI and the final heuristic RI are the same, and if the values of the limitation RI and the final heuristic RI are not the same, updating the limitation RI included in the first pre-configuration information into the final heuristic RI. If so, the first pre-configuration information need not be updated.

And after receiving the first pre-configuration information, the target terminal reports the aperiodic CSI according to the first pre-configuration information, and the base station side acquires and acquires the aperiodic CSI result reported by the target terminal within the effective duration of the current probing process.

And counting the times of the final heuristic RI included in the aperiodic CSI report of the target terminal, namely determining the total scheduling times of the final heuristic RI and the equivalent spectrum efficiency corresponding to the final heuristic RI. The equivalent spectrum efficiency corresponding to the final heuristic RI is determined according to the final heuristic RI reported by the target terminal and the MCS corresponding to the final heuristic RI, wherein the MCS corresponding to the final heuristic RI is determined according to the dynamically updated outer loop parameters.

Before the heuristic flow is started, the average spectrum efficiency of the reference RI is determined, specifically, the average spectrum efficiency of the reference RI is determined by counting the total times of the reference RI included in the CSI report of the target terminal and the MCS corresponding to the reference RI determined by the base station each time.

And determining whether to update the limiting RI included in the first pre-configuration information to the reference RI according to the total scheduling times of the final heuristic RI and the average spectrum efficiency of the reference RI, and issuing the updated limiting RI to the target terminal.

Specifically, when the limitation RI in the first pre-configuration information is different from the final heuristic RI, after updating the limitation RI in the first pre-configuration information to the final heuristic RI, the target terminal reports the aperiodic CSI according to the updated first pre-configuration information.

And in the effective duration of the heuristic flow, under the condition that the final heuristic RI is included in the aperiodic CSI reporting result of the target terminal received for the first time, namely at the first moment, updating the outer ring parameters of the MCS corresponding to the heuristic RI. The specific way of updating the outer loop parameters is:

acquiring all effective RI and MCS corresponding to each effective RI according to the steps, searching a spectrum efficiency mapping table, and determining the maximum spectrum efficiency value as target spectrum efficiency; the MCS corresponding to each effective RI is CSI information including the effective RI reported by the target terminal in the preset sliding window, and the base station receiving the CSI information determines the MCS according to the CQI information included in the CSI information and feedback information of the target terminal, and searches the spectrum efficiency mapping table based on each effective RI and the MCS corresponding to each effective RI, so as to determine the spectrum efficiency of each effective RI. And selecting the largest spectrum efficiency from all the spectrum efficiencies of the effective RI as the Target spectrum efficiency SE_target. Then, in the spectrum efficiency mapping table, the Target modulation and coding strategy mcs_target, which belongs to the final heuristic RI, is found to be closest to the Target spectrum efficiency and is larger than the Target spectrum efficiency.

The spectrum efficiency mapping table corresponding to different coding modes also comprises SINR values corresponding to different MCSs determined by simulation or other modes such as statistical analysis of measured data.

For example, the spectrum efficiency mapping table corresponding to the 64QAM coding mode may also be represented as shown in table 3:

TABLE 3 Table 3

The SINR in the last column represents SINR corresponding to different MCSs in the 64QAM coding scheme, and the SINR value is determined by means of simulation or statistical analysis of measured data. In general, different MCS values correspond to different SINR values, and according to the increment of the MCS index value, the SINR value corresponding to the MCS index value is also incremented. For example, MCS index 0, corresponding sinr_0= -2.8516, MCS index 1, corresponding sinr_1= -1.7500, MCS index 28, corresponding sinr_28= 19.6797.

Similarly, for the spectrum efficiency mapping table corresponding to other coding modes (such as 256QAM, 1024QAM, etc.), SINR corresponding to different MCS exists, and the method similar to 64QAM can be used for determining.

The outer loop parameters for determining the MCS under the final heuristic RI are updated as follows:

∆SINR = SINR_Target - SINR_His

wherein, SINR_Target is the SINR corresponding to MCS_Target, SINR_His is the SINR corresponding to the scheduling MCS of the reference RI. The sinr_target herein is a Target modulation and coding strategy mcs_target determined according to a final heuristic RI and a final heuristic RI, a signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) is determined by searching a spectrum efficiency mapping table, and the SINR corresponding to a scheduling MCS of a reference RI is a reference RI determined by a base station before starting a heuristic procedure, and based on a CQI included in CSI information to which the reference RI belongs and an MCS determined by feedback information of a Target terminal, an SINR located in the same line as the MCS is determined as sinr_his by searching a spectrum efficiency mapping table.

After the outer loop parameters corresponding to the final heuristic RI are updated according to the method, all final heuristic RI between the first time and the ending time (second time) of the effective duration of the heuristic flow and the MCS corresponding to each final heuristic RI are obtained.

Specifically, after updating the outer loop parameter corresponding to the final heuristic RI, the target terminal reports aperiodic CSI according to the first preconfigured information including the final heuristic RI, the base station counts the number of times that the CSI information including the final heuristic RI reported by the target terminal includes the final heuristic RI in the effective duration of the heuristic process, that is, counts the number of times that the CSI information including the heuristic RI reported by the target terminal includes the heuristic RI between the first time and the second time, and determines the MCS corresponding to the final heuristic RI based on the CQI information including the final heuristic RI reported by the target terminal and the feedback information of the target terminal, and then searches the spectrum efficiency mapping table to determine the equivalent spectrum efficiency of the final heuristic RI.

If the total number of times of reporting the final heuristic RI is counted in the effective duration of the heuristic flow, namely, the target terminal is scheduled, and the reported CSI information comprises the total number of times of the final heuristic RI. When the total number of times of reporting the final heuristic RI is determined to be greater than or equal to a preset third threshold and the equivalent spectral efficiency of the final heuristic RI is smaller than the average value of the spectral efficiencies corresponding to the reference RI, the performance of the reference RI is indicated to be better, and the target terminal should be configured to perform aperiodic CSI reporting according to the reference RI. The preset third threshold is generally smaller than the preset first threshold and larger than the preset second threshold. Can be set according to actual requirements and adjusted according to final analysis results. The effective duration of the heuristic flow can be realized by setting a timer.

In addition, if the total number of times of reporting the final heuristic RI obtained by statistics is smaller than a preset third threshold value within the effective duration of the heuristic process, or if it is determined that the total number of times of reporting the final heuristic RI obtained by statistics is greater than or equal to the preset third threshold value, the equivalent spectral efficiency of the final heuristic RI is greater than or equal to the average value of the spectral efficiencies corresponding to the reference RI, then the limiting RI in the first preset information does not need to be updated.

And stopping the probing process after the effective duration of the probing process is up, without updating the limitation RI in the first preconfiguration information, and exiting the probing process.

Fig. 2 is a schematic implementation flow chart of an adaptive adjustment method for rank indication according to an embodiment of the present invention, as shown in fig. 2, including:

step 201, receiving channel state information CSI information of a target terminal, and determining a scheduling rank indication RI;

the base station receives the CSI information reported by the target terminal, slides the preset sliding window for unit duration through the preset sliding window, acquires the effective rank indication RI, and determines the most scheduling rank indication RI with the maximum frequency spectrum efficiency in the effective rank indication RI.

Step 202, determining a reference rank indication RI and a heuristic rank indication RI;

and determining the heuristic RI corresponding to the reference RI based on a preset heuristic RI condition and a scheduling RI adjacent to the reference RI.

Step 203, determining whether the number N of the heuristic RIs is greater than or equal to 1, and if N is greater than or equal to 1, proceeding to step 204; if N is less than 1, then step 201 is entered;

step 204, selecting one as the final heuristic rank indication RI;

when there is a heuristic RI, the heuristic RI is used as the final heuristic RI;

when there are multiple heuristic RI, one of them is selected as the final heuristic RI, a specific method may be to use one heuristic direction counter, select the most counted as the final heuristic RI, or randomly select one.

Step 205, starting a probing process timer, and reconfiguring a rank indicator RI in the aperiodic channel state information CSI to be a final probing rank indicator RI;

in order to control the duration of the probing process, for example, the probing process timer is started, and whether the limitation RI reported by the current aperiodic CSI is equal to the final probing RI is judged, wherein the limitation RI reported by the aperiodic CSI is not issued to the target terminal when the target terminal is initially accessed to the base station, the base station generates relevant configuration information only at the base station side, and if the final probing RI determined by the base station according to the steps is not equal to the limitation RI preconfigured to the target terminal, the RI in the configuration needs to be updated to be the final probing RI. And immediately transmitting the result to a target terminal, and performing CSI measurement reporting by the target terminal according to aperiodic CSI reporting configuration transmitted by the base station.

Step 206, receiving aperiodic channel state information CSI including the final tentative RI;

when receiving CSI information including final heuristic RI sent by a Target terminal for the first time, a base station acquires the maximum value of SE corresponding to all effective RI dispatching MCS as SE_target, and finds out MCS which is just larger than the SE_target under the heuristic RI as MCS_target by searching a spectrum efficiency mapping table;

Step 207, updating the outer ring parameters corresponding to the final heuristic RI;

and determining the outer loop parameters to be updated based on the SINR corresponding to the MCS_Target, the reference RI and the SINR determined by the MCS corresponding to the reference RI through table lookup.

Step 208, counting the times of the CSI information including the final heuristic RI reported by the target terminal, namely the final heuristic RI scheduling times, in the effective duration of the heuristic process;

step 209, whether greater than or equal to a third preset threshold;

if it is determined that the number of times of the final heuristic RI scheduling is greater than or equal to the third preset threshold, step 210 is entered, if it is determined that the number of times of the final heuristic RI scheduling is less than the third preset threshold, the heuristic flow timer is stopped, the heuristic flow is exited, and step 201 is entered;

step 210, whether the equivalent spectral efficiency SE of the current heuristic rank indication RI is smaller than the average spectral efficiency SE of the reference RI;

when the base station receives CSI information including the final heuristic RI sent by the target terminal for the first time, determining the equivalent spectrum efficiency SE of the current final heuristic RI in the effective duration of the heuristic flow based on the updated outer ring parameters corresponding to the final heuristic RI.

Comparing the equivalent spectrum efficiency SE of the current final heuristic RI with the average spectrum efficiency SE of the reference RI; if the equivalent spectral efficiency SE of the current probing rank indication RI is less than the average spectral efficiency SE of the reference RI, step 211 is entered; otherwise, stopping the probing process timer, exiting the probing process, and entering step 201;

Step 211, reconfiguring the rank indication RI in the reporting of the aperiodic channel state information CSI as a reference rank indication RI;

if it is determined that the preset indication update condition is satisfied, the aperiodic CSI is reconfigured as the reference RI, the heuristic flow timer is stopped, the heuristic flow is exited, and step 201 is entered.

In order to more clearly describe the adaptive adjustment method of rank indication provided by the present invention, a specific example will be described below.

The table lookup in each of the examples below represents a lookup of the spectral efficiency map.

Case 1, in which the reference RI determined for the base station is the maximum value of RI supported by the target terminal, there is no case of probing RI.

1) Judging whether the UE meets the enabling condition of the method:

UE supports aperiodic CSI reporting; and in a period of time, the downlink continuous scheduling frequency of the UE is greater than or equal to a preset first threshold N (such as 500 times).

2) When the method enabling condition is met, the UE is used as a target terminal, and a frequency spectrum efficiency mapping table corresponding to the 256QAM in the coding mode is determined through signaling interaction between the target terminal and the base station.

The base station obtains all effective RI reported by the target terminal from the RI timeliness sliding window module: [4,4,3,4,2,4,4,4] obtaining the channel MCS under all valid RI from the downlink channel MCS module: [11,11,14,11,19,11,11,11] by looking up the spectrum efficiency map, selecting ri=4 as the scheduling RI after comparing with SE, and recording as ri_normal.

3) The MCS corresponding to RI_normal is the MCS under the scheduling RI, which is MCS_11 at this time, denoted MCS_normal.

4) The latest PMI under RI_normal is obtained from the PMI maintenance module and is marked as PMI_normal.

5) Counting the scheduling times and average SE of all RI in 500 scheduling in the above flow, and selecting RI with the largest scheduling times as a reference RI. RI1 schedules 0 times, RI2 schedules 2 times, RI3 schedules 60 times, RI4 schedules 438 times, and ri=4 is selected as a reference RI. Based on the RI value of each schedule and the MCS corresponding to the determined RI value in the 500 schedules, it is determined that the average SE range corresponding to the 500 schedules (the RI included in the CSI information terminal reported by the target terminal) is 10.23 to 10.92 by looking up the spectrum efficiency mapping table.

6) In the method for determining the RI set according to the heuristics:

when reference ri=4

And when the scheduling times of RI=3 are smaller than a preset second threshold k×N and the average SE corresponding to 500 times of scheduling is smaller than the spectrum efficiency corresponding to the MCS high threshold of RI=3, adding RI=3 into the heuristic RI set to serve as a first set.

The first threshold N is preset to be 500, k defaults to 0.1, and the scheduling frequency of heuristic ri=3 is 60 times, which is greater than 0.1×500. The average SE corresponding to 500 schedules is smaller than the SE corresponding to MCS high threshold with ri=3 (look-up table 22.2189). The predetermined heuristic RI condition is not satisfied, so ri=3 cannot be added to the heuristic RI set as the first set. I.e. the heuristic RI set (first set) is empty, no heuristic flow is entered.

Case 2: aiming at the condition that the reference RI determined by the base station is the maximum value of RI supported by the target terminal, a heuristic RI exists.

1) Judging whether the UE meets the enabling condition of the method:

5) Counting the scheduling times and average SE of all RI in 500 scheduling in the above flow, and selecting RI with the largest scheduling times as a reference RI. RI1 schedules 0 times, RI2 schedules 2 times, RI3 schedules 40 times, RI4 schedules 458 times, and ri=4 is selected as a reference RI. Based on the RI value of each schedule and the MCS corresponding to the determined RI value in the 500 schedules, the range of average SE corresponding to the 500 schedules (RI included in the CSI information terminal reported by the target terminal) is determined to be 10.23 to 10.92 by looking up the spectrum efficiency mapping table.

6) In the method for determining the RI set according to the heuristics:

when reference ri=4

The first threshold N is preset to be 500, k defaults to 0.1, and the scheduling times of heuristic ri=3 are 40 times, which is smaller than 0.1×500. The average SE corresponding to 500 schedules is smaller than the SE corresponding to MCS high threshold with ri=3 (look-up table 22.2189). The default heuristic RI condition is satisfied, so ri=3 is added to the heuristic RI set.

7) At this time, only one RI in the heuristic RI set, i.e., ri=3, does not need a heuristic direction counter, satisfies the heuristic flow condition, and directly enters the heuristic flow.

8) The heuristic flow validity period Timer valid_Timer0 is started.

9) Judging whether the limit RI reported by the current aperiodic CSI is equal to the heuristic RI, wherein the limit RI=3 reported by the aperiodic CSI in the example is equal to the heuristic RI, and the reconfiguration of the aperiodic CSI is not needed.

10 Under the condition that a valid_Timer0 of the heuristic flow is not overtime, directly updating the outer loop parameters of the heuristic RI when the PMI under the heuristic RI reported by the aperiodic CSI is received for the first time, specifically comprising:

10-1, obtaining the maximum value of SE corresponding to all effective RI scheduling MCSs between the starting time of the timer and the time when the first time of receiving the aperiodic CSI report including the probe RI, marking the maximum value as se_target at 10.922, looking up a table, finding a column of the probe ri=3, finding a row just larger than the se_target, obtaining mcs=15, and marking the column as mcs_target. The outer loop parameter is updated to be equal to the resulting sinr_rl3=sinr_15-sinr_11, where sinr_11 is the SINR corresponding to mcs_11 of the reference RI and sinr_15 is the SINR corresponding to mcs_target.

11 After updating the outer loop of the heuristic RI, starting to count the scheduling times of the heuristic RI

And counting the times of the target terminal for carrying out aperiodic CSI reporting and including the heuristic RI.

12 If the equivalent SE of the current heuristic RI is less than the average SE of the reference RI, the aperiodic CSI is reconfigured into the reference RI, the heuristic flow timer is stopped, and the heuristic flow is exited when the heuristic RI scheduling times are greater than or equal to a preset third threshold M (default is 100) in the heuristic flow effective period; otherwise, the aperiodic CSI does not need to be reconfigured, the probing process timer is stopped, and the probing process is exited. The number of times of scheduling the heuristic RI is 120 times and is more than 100 times, the equivalent SE of the heuristic RI is more than or equal to the average SE of the reference RI, the aperiodic CSI does not need to be reconfigured, the heuristic flow timer is stopped, and the heuristic flow is exited.

Case 3: for the base station to determine that the reference RI is the minimum value of RI supported by the target terminal, there is a heuristic RI.

1) Judging whether the UE meets the enabling condition of the method:

2) When the method enabling condition is met, the UE is a target terminal, and a frequency spectrum efficiency mapping table corresponding to the 256QAM in the coding mode is determined through signaling interaction between the target terminal and the base station.

The base station obtains all effective RI reported by the UE from the RI time efficiency sliding window module: [1,1,2,1,3,1,1,1] obtaining the channel MCS under all valid RI from the downlink channel MCS module: [19,19,9,19,5,19,19,19] by looking up the spectrum efficiency map, selecting ri=1 as the scheduling RI after comparing with SE, and recording as ri_normal.

3) The MCS corresponding to RI_normal is the MCS under the scheduling RI, which is MCS_19 at this time, denoted MCS_normal.

5) Counting the scheduling times and average SE of all RI in 500 scheduling in the above flow, and selecting RI with the largest scheduling times as a reference RI. RI1 schedules 448 times, RI2 schedules 48 times, RI3 schedules 4 times, RI4 schedules 0 times, and ri=1 is selected as a reference RI. Based on the RI value of each schedule and the MCS corresponding to the determined RI value in the 500 schedules, the range of average SE corresponding to the 500 schedules (RI included in the CSI information terminal reported by the target terminal) is determined to be 4.42 to 5.11 by looking up the spectrum efficiency mapping table.

6) In the method for determining the RI set according to the heuristics:

when reference ri=1

And when the scheduling times of RI=2 are smaller than a preset second threshold k×N and the average SE corresponding to 500 times of scheduling is larger than the spectrum efficiency corresponding to the MCS low threshold of RI=2, adding RI=2 into the heuristic RI set to serve as a first set.

The first threshold N is preset to be 500, k defaults to 0.1, and the scheduling times of the heuristic ri=2 are 48 times, which is smaller than 0.1×500. The average SE corresponding to 500 schedules is greater than the SE corresponding to MCS low threshold with ri=2 (look-up table 0.4688). The default heuristic RI condition is satisfied, so ri=2 is added to the heuristic RI set.

7) At this time, only one RI in the heuristic RI set, i.e., ri=2, does not need a heuristic direction counter, satisfies the heuristic flow condition, and directly enters the heuristic flow.

8) The heuristic flow validity period Timer valid_Timer0 is started.

9) Judging whether the limit RI reported by the current aperiodic CSI is equal to the heuristic RI, wherein the limit RI=3 reported by the aperiodic CSI in the example is not equal to the heuristic RI, and the aperiodic CSI needs to be reconfigured to be RI=2.

10-1, obtaining the maximum value of SE corresponding to all effective RI scheduling MCSs between the starting time of the timer and the time when the first time of receiving the aperiodic CSI report including the tentative RI, marking as se_target for 5.1152, looking up a table, finding out a row just greater than 5.1152 from the tentative ri=2 column, obtaining mcs=10, and marking as mcs_target. The outer loop parameter is updated to be the nominal sinr_rl2=sinr_10-sinr_19; here, sinr_10 is SINR corresponding to mcs_target, SINR19 is SINR corresponding to mcs_19 of the reference RI, and in this embodiment, the reference RI is ri=1, and in step 3, it is known that MCS corresponding to the reference ri=1 is MCS19.

12 If the equivalent SE of the current heuristic RI is less than the average SE of the reference RI, the aperiodic CSI is reconfigured into the reference RI, the heuristic flow timer is stopped, and the heuristic flow is exited when the heuristic RI scheduling times are greater than or equal to a preset third threshold M (M is taken as 100 by default) in the heuristic flow effective period; otherwise, the aperiodic CSI does not need to be reconfigured, the probing process timer is stopped, and the probing process is exited. The scheduling times of the heuristic RI of the embodiment are 135 times and more than 100 times, the equivalent SE of the heuristic RI is more than or equal to the average SE of the reference RI, the aperiodic CSI does not need to be reconfigured, the heuristic flow timer is stopped, and the heuristic flow is exited.

Case 4: for any value between the maximum value and the minimum value of RI supported by the target terminal, the reference RI determined by the base station, there are a plurality of cases of heuristic RI.

1) Judging whether the UE meets the enabling condition of the method:

The base station obtains all effective RI reported by the target terminal from the RI timeliness sliding window module: [3,3,2,3,1,3,3,3] obtaining the channel MCS under all valid RI from the downlink channel MCS module: [12,12,15,12,20,12,12,12] by looking up the table, ri=3 was chosen as the scheduling RI after comparison with SE, and was noted as ri_normal.

3) The MCS corresponding to RI_normal is the MCS under the scheduling RI, which is MCS_12 at this time, denoted MCS_normal.

5) Counting the scheduling times and average SE of all RI in 500 scheduling in the above flow, and selecting RI with the largest scheduling times as a reference RI. RI1 schedules 0 times, RI2 schedules 36 times, RI3 schedules 426 times, RI4 schedules 38 times, and ri=3 is selected as a reference RI. Based on the RI value of each schedule and the MCS corresponding to the determined RI value in the 500 schedules, the range of average SE corresponding to the 500 schedules (RI included in the CSI information terminal reported by the target terminal) is determined to be 5.3 to 9.08 by looking up the spectrum efficiency mapping table.

6) In the method for determining the RI set according to the heuristics:

when reference ri=3

1. And adding RI=2 to the heuristic RI set when the scheduling times of RI=2 in the window are smaller than a preset second threshold k×N and the average SE in the window is smaller than the spectrum efficiency corresponding to the MCS high threshold of RI=2.

The first threshold N is preset to be 500, k defaults to 0.1, and the scheduling frequency of ri=2 is 36 times, which is less than 0.1×500. The average SE corresponding to 500 schedules is smaller than the SE corresponding to MCS high threshold with ri=2 (look-up table 14.8126). The default heuristic RI condition is satisfied, so ri=2 is added to the heuristic RI set.

2. And adding RI=4 to the heuristic RI set when the scheduling times of RI=4 in the window are smaller than a preset second threshold k×N and the average SE in the window is larger than the spectrum efficiency corresponding to the MCS low threshold of RI=4.

The first threshold N is preset to be 500, k defaults to 0.1, and the scheduling frequency of ri=4 is 38 times, which is smaller than 0.1×500. The average SE corresponding to 500 schedules is greater than the SE corresponding to MCS low threshold with ri=4 (look-up table 0.9376). The default heuristic RI condition is satisfied, so ri=4 is added to the heuristic RI set. And further determining that the first set includes ri=2 and ri=4.

7) At this time, 2 RIs in the heuristic RI set, i.e., ri=2 and ri=4, need a heuristic direction counter.

8) Starting a heuristic Direction Counter of direct_counter 0, when the condition that two heuristic RI exist in the heuristic set occurs Y times (Y defaults to 2), adding 1 to the Counter, in this example, the heuristic Direction Counter is finally 19, modulo 2 is equal to 1, is odd, and heuristics towards low RI, namely ri=2 towards the final heuristic RI. And (5) meeting the condition of the heuristic flow and directly entering the heuristic flow.

9) The heuristic flow validity period Timer valid_Timer0 is started.

10 Judging whether the limit RI reported by the current aperiodic CSI is equal to the heuristic RI, wherein the limit RI=2 reported by the aperiodic CSI in the example is equal to the heuristic RI, and the reconfiguration of the aperiodic CSI is not needed.

11 Under the condition that a valid_Timer0 of the heuristic flow is not overtime, directly updating the outer ring of the heuristic RI when the PMI under the heuristic RI reported by the aperiodic CSI is received for the first time, specifically comprising:

11-1, obtaining the maximum value of SE corresponding to all effective RI scheduling MCSs between the starting time of the timer and the time when the first time of receiving the aperiodic CSI report including the tentative RI, marking as se_target for 9.0879, looking up a table, finding out a row just larger than the se_target from the tentative ri=2 column, obtaining mcs=18, and marking as mcs_target. The outer loop parameter is updated to be equal to the resulting sinr_rl2=sinr_18-sinr_12, where sinr_12 corresponds to mcs_12 of the reference RI and sinr_18 is the SINR corresponding to mcs_target.

12 After updating the outer loop of the heuristic RI, starting to count the scheduling times of the heuristic RI

13 If the equivalent SE of the current heuristic RI is less than the average SE of the reference RI, the aperiodic CSI is reconfigured into the reference RI, the heuristic flow timer is stopped, and the heuristic flow is exited when the heuristic RI scheduling times are greater than or equal to a preset third threshold M (M is taken as 100 by default) in the heuristic flow effective period; otherwise, the aperiodic CSI does not need to be reconfigured, the probing process timer is stopped, and the probing process is exited.

14 When the heuristic flow Timer valid_Timer0 times out, the heuristic flow Timer is stopped, the aperiodic CSI is not required to be reconfigured, and the heuristic flow is exited. In this example, the number of times of the heuristic RI scheduling is 85 times, and is not more than 100 times, the heuristic process Timer valid_Timer0 times out, the heuristic process Timer is stopped, the aperiodic CSI is not required to be reconfigured, and the heuristic process is exited.

Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention; as shown in fig. 3, the electronic device includes a processor (processor) 310, a communication interface (Communications Interface) 320, a memory (memory) 330, and a communication bus 340, where the processor 310, the communication interface 320, and the memory 330 communicate with each other through the communication bus 340. The processor 310 may invoke logic instructions in the memory 330 to perform an adaptive adjustment method of rank indication, the method comprising:

determining a value of the reference RI;

the heuristic flow comprises:

determining a maximum spectrum efficiency value as a target spectrum efficiency based on all the effective RI and the spectrum efficiency corresponding to each effective RI;

It should be noted that, the electronic device provided by the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effects, and the parts and beneficial effects that are the same as those of the method embodiment in the present embodiment are not described in detail herein.

Further, the logic instructions in the memory 330 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Fig. 4 is a schematic structural diagram of an adaptive adjustment apparatus for rank indication according to an embodiment of the present invention, as shown in fig. 4, the apparatus includes:

a scheduling rank indication module 401, configured to determine, based on an effective RI reported by a target terminal and spectrum efficiency corresponding to each effective RI, an effective RI with a maximum spectrum efficiency as a scheduling RI; the target terminal is a terminal supporting aperiodic CSI reporting;

A reference rank indication module 402, configured to determine the scheduling RI with the largest scheduling number as a reference RI;

a heuristic rank indication module 403, configured to determine a first set of heuristic RI corresponding to the reference RI based on a preset heuristic RI condition and a scheduling RI adjacent to the reference RI;

and a heuristic flow module 404, configured to determine, based on the first set, whether to start a heuristic flow, and further determine whether to update RI configuration information configured for the target terminal to perform aperiodic CSI reporting according to the heuristic flow.

Specifically, the adaptive adjustment device for rank indication provided by the present invention can implement all the method steps implemented by the method embodiments and achieve the same technical effects, and the same parts and beneficial effects as those of the method embodiments in the present embodiment are not described in detail herein.

In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are capable of performing the method of adaptive adjustment of rank indication provided by the above embodiments.

In another aspect, the present invention further provides a processor readable storage medium storing a computer program, where the computer program is configured to cause the processor to execute the adaptive adjustment method for rank indication provided in each of the foregoing embodiments.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), and the like.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adaptive adjustment method of rank indication, applied to a base station, is characterized by comprising the following steps:

determining the effective rank indication RI with the maximum spectrum efficiency as a scheduling rank indication RI based on the effective rank indication RI reported by a target terminal and the spectrum efficiency corresponding to each effective rank indication RI; the target terminal is a terminal supporting reporting of aperiodic Channel State Information (CSI);

determining the scheduling rank indication RI with the largest scheduling times as a reference rank indication RI;

determining a first set formed by a heuristic rank indication RI corresponding to a reference rank indication RI based on a preset heuristic rank indication RI condition and a scheduling rank indication RI adjacent to the reference rank indication RI;

based on the first set, determining whether to start a heuristic flow, and further determining whether to update and configure rank indication RI configuration information in the non-periodic Channel State Information (CSI) reporting of the target terminal according to the heuristic flow.

2. The method for adaptive adjustment of rank indication according to claim 1, wherein the determining the first set of tentative rank indication RI corresponding to the reference rank indication RI based on a preset tentative rank indication RI condition and a scheduled rank indication RI adjacent to the reference rank indication RI comprises:

Determining a value of the reference rank indication RI;

if the value of the reference rank indication RI is the maximum value of the rank indication RI supported by the target terminal, determining whether the first-order scheduling rank indication RI adjacent to the reference rank indication RI is used as a probing rank indication RI based on whether the scheduling times of the first-order scheduling rank indication RI adjacent to the reference rank indication RI is smaller than a preset second threshold and whether the first average value is smaller than a first high threshold; the first high threshold is the spectrum efficiency determined according to a spectrum efficiency mapping table, a first order scheduling rank indication RI adjacent to the reference rank indication RI, and a maximum modulation and coding strategy MCS corresponding to the first order scheduling rank indication RI adjacent to the reference rank indication RI;

if the value of the reference rank indication RI is the minimum value of the rank indication RI supported by the target terminal, determining whether the first-order scheduling rank indication RI adjacent to the reference rank indication RI is used as a probing rank indication RI based on whether the scheduling times of the first-order scheduling rank indication RI adjacent to the reference rank indication RI is smaller than a preset second threshold and whether the first average value is larger than a first low threshold; the first low threshold is the spectrum efficiency determined according to a spectrum efficiency mapping table, a first order scheduling rank indication RI adjacent to the reference rank indication RI, and a minimum modulation and coding strategy MCS corresponding to the first order scheduling rank indication RI adjacent to the reference rank indication RI;

If the value of the reference rank indication RI is other values of the rank indication RI supported by the target terminal, determining whether to take the first scheduling rank indication RI as a probing rank indication RI based on whether the scheduling times of the first scheduling rank indication RI is smaller than a preset second threshold and whether the first average value is larger than a second low threshold; or determining whether to take the second scheduling rank indication RI as a heuristic rank indication RI based on whether the scheduling times of the second scheduling rank indication RI is smaller than a preset second threshold and whether the first average value is smaller than a second high threshold; the first scheduling rank indication RI, the second scheduling rank indication RI are respectively a larger value of two first order scheduling rank indication RI adjacent to the reference rank indication RI, and a smaller value of two first order scheduling rank indication RI adjacent to the reference rank indication RI; the second low threshold is the spectrum efficiency determined according to the spectrum efficiency mapping table, the first scheduling rank indication RI, and the minimum modulation and coding strategy MCS corresponding to the first scheduling rank indication RI; the second high threshold is the spectrum efficiency determined according to the spectrum efficiency mapping table, the second scheduling rank indication RI, and the maximum modulation and coding strategy MCS corresponding to the second scheduling rank indication RI;

The spectrum efficiency mapping table is used for representing spectrum efficiencies corresponding to different rank indication RI and different modulation and coding strategies MCS under different coding modes.

3. The adaptive adjustment method of rank indication according to claim 1, wherein the determining the effective rank indication RI with the largest spectrum efficiency based on the effective rank indication RI reported by the target terminal and the spectrum efficiency corresponding to each effective rank indication RI includes:

sequentially obtaining effective rank indication RI reported by the target terminal in a preset sliding window for the preset sliding window moving unit time length; the preset sliding window comprises a plurality of unit time lengths, wherein the unit time lengths are average time lengths for reporting an effective rank indication RI by the target terminal;

acquiring Modulation and Coding Strategies (MCS) corresponding to each effective Rank Indication (RI); the modulation and coding strategy MCS corresponding to the effective rank indication RI is determined based on CQI associated with the effective rank indication RI and feedback information of the target terminal;

and determining the effective rank indication RI with the maximum spectrum efficiency as a scheduling rank indication RI based on the spectrum efficiency mapping table and a modulation and coding strategy MCS corresponding to the effective rank indication RI.

4. The method for adaptively adjusting rank indication according to claim 3, wherein determining whether to start a heuristic procedure based on the first set, and further determining whether to update rank indication RI configuration information configuring the target terminal for aperiodic channel state information CSI reporting according to the heuristic procedure, comprises:

determining the number of heuristic Rank Indication (RI) included in the first set as a first number;

if the first number is equal to 1, the heuristic rank indication RI is used as a final heuristic rank indication RI, and a heuristic flow is started;

if the first number is greater than or equal to 2, selecting one of the heuristic rank indicators RI included in the first set as a final heuristic rank indicator RI according to a preferential heuristic rule, and starting a heuristic flow;

the heuristic flow comprises:

if the limited rank indication RI included in the first pre-configuration information is different from the final heuristic rank indication RI, updating the limited rank indication RI included in the first pre-configuration information into the final heuristic rank indication RI; the first pre-configuration information is used for configuring the target terminal to report aperiodic Channel State Information (CSI);

Acquiring Channel State Information (CSI) which is reported by the target terminal in a non-periodic manner and comprises the final heuristic Rank Indication (RI) and a Modulation and Coding Strategy (MCS) corresponding to the final heuristic Rank Indication (RI) in the effective duration of the heuristic process based on the updated first preconfiguration information;

and determining whether to update the restricted rank indication RI included in the first preconfiguration information to the reference rank indication RI based on the total scheduling times of the final heuristic rank indication RI, the equivalent spectrum efficiency corresponding to the final heuristic rank indication RI and whether the average spectrum efficiency corresponding to the reference rank indication RI meets a preset indication update condition.

5. The method for adaptive adjustment of rank indication according to claim 4, wherein the acquiring, based on the updated first preconfiguration information, channel state information CSI reported by the target terminal aperiodically including the final heuristic rank indication RI and before the modulation and coding strategy MCS corresponding to the final heuristic rank indication RI in an effective duration of the heuristic procedure includes:

determining a maximum spectrum efficiency value as a target spectrum efficiency based on all the effective Rank Indication (RI) and the spectrum efficiency corresponding to each effective Rank Indication (RI);

In a spectrum efficiency mapping table, determining a modulation and coding strategy MCS which belongs to the final heuristic rank indication RI and is closest to the target spectrum efficiency and is larger than the target spectrum efficiency as a target modulation and coding strategy MCS;

at a first moment, based on a preset outer loop updating rule, the target modulation and coding strategy MCS, the modulation and coding strategy MCS corresponding to the reference rank indication RI and the spectrum efficiency mapping table, updating an outer loop parameter for determining the modulation and coding strategy MCS corresponding to the heuristic rank indication RI; the first time is the time when the final heuristic rank indication RI is included in the result of reporting the aperiodic channel state information CSI by the target terminal in the effective duration of the heuristic process;

based on the updated outer loop parameters, acquiring all final heuristic rank indication RI between a first time and a second time and modulation and coding strategies MCS corresponding to each final heuristic rank indication RI; and the second time is the termination time of the effective duration of the heuristic flow.

6. The method for adaptive adjustment of rank indication according to claim 5, wherein the determining whether to update the restricted rank indication RI included in the first preconfigured information to the reference rank indication RI based on the total number of scheduling times of the final tentative rank indication RI, the equivalent spectral efficiency corresponding to the final tentative rank indication RI, and the average spectral efficiency corresponding to the reference rank indication RI satisfy a preset indication update condition includes:

Counting the occurrence times of all the final heuristic rank indication RI between a first time and a second time as the scheduling total times;

determining the equivalent spectrum efficiency of the final probing rank indication RI based on a spectrum efficiency mapping table, all the final probing rank indication RI between a first time and a second time and a modulation and coding strategy MCS corresponding to each final probing rank indication RI;

and if the total scheduling times are determined to be greater than or equal to a preset third threshold value and the equivalent spectrum efficiency of the final heuristic rank indication RI is smaller than the spectrum efficiency mean value corresponding to the reference rank indication RI, updating the restricted rank indication RI included in the first preconfiguration information into the reference rank indication RI.

7. The adaptive adjustment method of rank indication according to claim 2, wherein the spectrum efficiency mapping table is a selected one of spectrum efficiency mapping tables corresponding to different coding modes when the target terminal accesses the base station.

8. An electronic device, applied to a base station, is characterized by comprising a memory, a transceiver and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

9. An adaptive adjustment device for rank indication, applied to a base station, comprising:

the scheduling rank indication module is used for determining the effective rank indication RI with the maximum spectrum efficiency as the scheduling rank indication RI based on the effective rank indication RI reported by the target terminal and the spectrum efficiency corresponding to each effective rank indication RI; the target terminal is a terminal supporting reporting of aperiodic Channel State Information (CSI);

A reference rank indication module, configured to determine the scheduling rank indication RI with the largest scheduling times as a reference rank indication RI;

the heuristic rank indication module is used for determining a first set formed by heuristic rank indication RI corresponding to the reference rank indication RI based on preset heuristic rank indication RI conditions and scheduling rank indication RI adjacent to the reference rank indication RI;

and the heuristic flow module is used for determining whether to start a heuristic flow based on the first set, and further determining whether to update and configure RI rank indication configuration information in the non-periodic Channel State Information (CSI) reporting of the target terminal according to the heuristic flow.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for causing a computer to execute the adaptive adjustment method of rank indication according to any one of claims 1 to 7.