WO2016172897A1

WO2016172897A1 - Channel quality indication adjustment method and device

Info

Publication number: WO2016172897A1
Application number: PCT/CN2015/077911
Authority: WO
Inventors: 李少华; 杜静; 敖娟
Original assignee: 华为技术有限公司
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2016-11-03
Also published as: CN106464445B; CN106464445A

Abstract

Provided in embodiments of the present invention are a channel quality indication (CQI) adjustment method and device, the method comprising: grouping, according to classification information of subframe numbers, two or more of the subframe numbers reported by a UE in an ACK/NCK feedback into two or more groups; determining, according to the ACK/NCK feedback reported by the UE in the subframes respectively corresponding to the two or more subframe numbers, CQI adjustment numbers respectively corresponding to the two or more groups; determining, according to the CQI adjustment numbers respectively corresponding to the two or more groups and a CQI reported by the UE, adjusted CQIs respectively corresponding to the two or more groups; determining, according to the adjusted CQIs respectively corresponding to the two or more groups, transport block (TB) indexes respectively corresponding to the two or more groups; and scheduling transmission resources according to the TB indexes respectively corresponding to the two or more groups so as to address the problem in the prior art in which a subframe corresponding to a subframe number, served by a serving sell and experiencing less interference from a neighbor cell, has a lower MCS level.

Description

Channel quality indication adjustment method and device

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to a method and an apparatus for adjusting a Channel Quality Indication (CQI).

Background technique

In order to meet the increasing demand for data services, the 3rd Generation Partnership Project (3GPP) launched the "Long Term Evolution (LTE) project, which aims to evolve through continuous evolution. 3G system provides more powerful data service support and provides better service for users. Key technologies of the LTE system include scheduling and adaptive modulation coding techniques.

In the LTE system, in order to implement the scheduling and adaptive modulation and coding techniques, the user equipment (UE, User Equipment) is required to report the CQI according to the downlink pilot signal of the current serving cell, and perform acknowledgement (ACK, Acknowledgment)/negative on the subframe. Confirm (Negative Acknowledgment) feedback. The base station (that is, the base station to which the serving cell belongs) determines the CQI adjustment amount according to the ACK/NCK reported by the UE in all subframes, and obtains the corrected CQI according to the CQI adjustment amount and the CQI reported by the UE. The base station determines, according to the modified CQI, a downlink scheduled transport block (TB) index corresponding to the UE. Finally, the base station performs scheduling of the transmission resource according to the TB index. The scheduling of the transmission resource by the base station according to the TB index includes: determining a modulation and coding scheme (MCS) according to the TB index, and a resource block (RB, Resource) allocated to the UE according to the TB index. Block number (that is, the number of available RBs) and the size of the data to be sent to the UE, determine the TB size (TBS, TB Size); perform scheduling of the transmission resource according to the MCS order and the TBS.

However, in the prior art, when the subframe corresponding to the molecular frame number in the middle of the serving cell is interfered by the neighboring area and the subframe corresponding to the other part of the subframe number is less interfered by the neighboring cell, there is interference in the neighboring cell in the serving cell. The problem that the subframe number corresponding to the small subframe number is lower in the MCS order.

Summary of the invention

The embodiment of the present invention provides a method and a device for adjusting a channel quality indicator, which are used to solve the problem that the number of MCSs of a subframe corresponding to a subframe number with less neighboring interference in a serving cell existing in the prior art is lower.

In a first aspect, an embodiment of the present invention provides a method for adjusting a CQI, where the method is applied to an LTE system, where the LTE system includes a serving cell where the UE is located, and a neighboring cell of the serving cell, where the serving cell is The neighboring cell is time-synchronized; the method is performed by a base station to which the serving cell belongs, and the method includes:

Obtaining subframe number classification information, where the subframe number classification information is used to indicate that a subframe corresponding to a subframe number belonging to a different category in the neighboring cell has different interference levels to the serving cell;

Decoding, according to the subframe number classification information, at least two subframe numbers into at least two groups; wherein the at least two subframe numbers are subframe numbers of subframes in which the UE reports ACK/negative acknowledgement NCK feedback; Among the at least two subframe numbers, the subframe numbers in the same group belong to the same category in the subframe number classification information, and the subframe numbers in different groups belong to different categories in the subframe number classification information. ;

Determining, according to the ACK/NCK feedback of the UE on the subframe corresponding to the at least two subframe numbers, respectively, the at least two groups of CQI adjustment amounts respectively; and according to the at least two groups of corresponding CQI adjustment amounts respectively And determining, by the CQI reported by the UE, the corrected CQI corresponding to the at least two groups respectively;

And determining, according to the modified CQI corresponding to the at least two groups, the at least two sets of respectively corresponding transport block TB indexes; and performing scheduling of the transmission resources according to the at least two sets of respectively corresponding transport block TB indexes.

With reference to the first aspect, in the first possible implementation manner of the first aspect, the acquiring the subframe number classification information includes: acquiring a data bearer status of each subframe number of the neighboring area, and according to the foregoing The data bearer status of the subframe number determines the subframe number classification information; or, the interference level of the subframe corresponding to each subframe number of the neighboring cell to the serving cell is obtained, and according to the subframe number The corresponding subframes respectively determine the subframe number classification information for the interference level of the serving cell.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the subframe that is corresponding to the at least two subframe numbers of the UE The ACK/NCK feedback on the top determines the CQI adjustment amount corresponding to the at least two groups respectively, including:

For each of the at least two groups, according to the UE in the at least two subframe numbers The ACK/NCK feedback on the subframe corresponding to the subframe number of each group determines the CQI adjustment amount of each group.

In combination with the first aspect or the first to the second aspect of the first aspect, in a third possible implementation manner of the first aspect, the at least two groups respectively correspond to the CQI Adjusting the amount and the CQI reported by the UE, and determining the corrected CQI corresponding to the at least two groups respectively, including:

For each of the at least two groups, the corrected CQI of each group is determined according to the CQI adjustment amount of each group and the CQI.

In combination with the first aspect or the first to the third of the first aspect, in a fourth possible implementation manner of the first aspect, the corresponding transmission according to the at least two groups The block TB index performs scheduling of transmission resources, including:

In the resource block RB allocated to the UE, the subframe in which the subframe number belongs to any one of the at least two groups performs scheduling of the transmission resource according to the TB index of the any group.

In a second aspect, an embodiment of the present invention provides a CQI adjustment apparatus, where the apparatus is applied to a Long Term Evolution (LTE) system, where the LTE system includes a serving cell where a user equipment UE is located, and a neighboring area of the serving cell. The serving cell is time-synchronized with the neighboring cell; the device is a base station to which the serving cell belongs, and the device includes:

An acquiring module, configured to acquire subframe number classification information, where the subframe number classification information is used to indicate that a subframe corresponding to a subframe number belonging to a different category in the neighboring cell has different interference levels to the serving cell;

a grouping module, configured to divide at least two subframe numbers into at least two groups according to the subframe number classification information, where the at least two subframe numbers are subframes in which the UE reports an acknowledgement ACK/negative acknowledgement NCK feedback a subframe number of the at least two subframe numbers, the subframe numbers in the same group belong to the same category in the subframe number classification information, and the subframe numbers in different groups are classified in the subframe number. The information belongs to different categories;

a CQI adjustment amount determining module, configured to determine, according to the ACK/NCK feedback of the UE on the subframe corresponding to the at least two subframe numbers, respectively, the at least two groups of CQI adjustment amounts respectively; and according to the at least Determining, by the two groups, the CQI adjustment amount and the CQI reported by the UE, respectively, determining the corrected CQI corresponding to the at least two groups respectively;

a scheduling module, configured to determine, according to the at least two sets of corrected CQIs respectively At least two sets of corresponding transport block TB indexes are respectively included; and scheduling of transmission resources is performed according to the at least two sets of respectively corresponding transport block TB indexes.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the acquiring module is specifically configured to:

Obtaining a data bearer status of each subframe number of the neighboring cell, and determining the subframe number classification information according to a data bearer state of each subframe number; or acquiring a corresponding subframe number of the neighboring cell And determining, by the subframe, the interference level of the serving cell, and determining the subframe number classification information according to the interference level of the serving cell by the subframe corresponding to each subframe number.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the CQI adjustment amount determining module is configured according to the UE in the at least two subframe numbers Determining, by the ACK/NCK feedback on the corresponding subframes, the CQI adjustment amounts corresponding to the at least two groups respectively, specifically including:

For each of the at least two groups, determining CQI of each group according to ACK/NCK feedback on the subframe corresponding to the subframe number of each group in the at least two subframe numbers Adjustment amount.

With reference to the second aspect or the first to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the CQI adjustment amount determining module is configured according to the at least two The correct CQI corresponding to the at least two groups is determined by the corresponding CQI adjustment amount and the CQI reported by the UE, and specifically includes:

In a fourth possible implementation manner of the second aspect, the scheduling module may respectively correspond to the at least two groups according to the second aspect or the first to the third possible implementation manner of the second aspect The transport block TB index performs scheduling of transmission resources, including:

A method and device for adjusting a channel quality indicator according to an embodiment of the present invention, by using sub-frame number classification information, where the sub-frame number classification information is used to indicate a sub-frame number corresponding to a different category in the neighboring cell. The frame has different interference levels to the serving cell, and the at least two subframe numbers that are reported by the UE to report ACK/NCK feedback are divided into at least two groups; wherein the subframe numbers in the same group are in the The sub-frame number classification information belongs to the same category, and the sub-frame numbers in different groups belong to different categories in the sub-frame number classification information; according to the UE in the subframe corresponding to the at least two sub-frame numbers respectively ACK/NCK feedback, determining the CQI adjustment amount corresponding to the at least two groups respectively; and determining, according to the at least two groups of corresponding CQI adjustment amounts and the CQI reported by the UE, Determining, according to the modified CQI corresponding to the at least two groups, respectively, the at least two sets of corresponding TB indexes; and performing scheduling of transmission resources according to the at least two sets of respectively corresponding transport block TB indexes; The base station can group the subframe number of the subframe in which the ACK/NCK is reported by the UE according to the subframe number classification information, and the subframe number in the same group has the same interference level to the serving cell, and is in the subframe group of the different group to the serving cell. The interference level is different; and the corresponding CQI adjustment amount is determined for each group separately; so that the MCS order of the subframe corresponding to the subframe number with less interference in the adjacent area is not blocked by the neighboring area in which it is in a different group. Larger subframe number corresponding subframe down; MCS order to improve the number of neighboring cell interference subframe by subframe number corresponding to the smaller of. Therefore, the problem that the MCS order of the subframe corresponding to the subframe number with less neighboring interference is lower in the prior art is solved.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of an application scenario of a method for adjusting a CQI according to the present invention;

2 is a flowchart of Embodiment 1 of a method for adjusting a CQI according to the present invention;

3 is a flowchart of Embodiment 2 of a method for adjusting a CQI according to the present invention;

4 is a graph showing relationship between SINR and downlink throughput rate in an external field scenario of the present invention;

5 is a graph showing relationship between SINR and MCS order in an external field scenario of the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 1 of a CQI adjusting apparatus according to the present invention; FIG.

FIG. 7 is a schematic structural diagram of Embodiment 2 of an apparatus for adjusting a CQI according to the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the drawings, and the embodiments are described as a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic diagram of an application scenario of a method for adjusting a CQI according to the present invention; as shown in FIG. 1 , the application scenario includes: a serving cell and a neighboring cell of the serving cell; and when the load in the neighboring cell is light, the neighboring cell may be turned off. There is no need to transmit a partial subframe number of the user data (that is, the power amplifier is turned off within the symbol period of the partial subframe number) to reduce the interference of the neighboring cell to the serving cell. Since the partial subframe number of the neighboring cell is turned off, when the serving cell synchronizes with the neighboring cell time, the subframe corresponding to the partial subframe number in the serving cell is less interfered by the neighboring cell, and the other part of the serving cell is smaller. The subframe corresponding to the subframe number is subjected to a scene with large interference from the neighboring area. The number of NCKs fed back in the subframe corresponding to the partial subframe number in which the neighboring area has a large interference in the serving cell is larger than the number of NCKs in the subframe corresponding to the partial subframe number in which the neighboring area has less interference, and the number of NCKs is higher. The smaller the CQI adjustment amount is, the smaller the corresponding MCS order is. Therefore, the CQI adjustment is uniformly performed based on the ACK/NCK feedback on the subframe corresponding to all the subframe numbers reported by the UE in the prior art, which will lower the CQI adjustment. The MCS order of the subframe corresponding to the subframe number with less interference in the neighboring cell; therefore, there is a problem that the MCS order of the subframe corresponding to the subframe number with less interference in the neighboring cell in the serving cell is lower.

It should be noted that the serving cell has six neighboring cells in FIG. 1 as an example, and the serving cell may have one or more neighboring cells.

It should be noted that when the serving cell is a cell with a large number of users and a large amount of traffic (that is, a hotspot cell), it is more urgent to solve the subframe MCS order corresponding to the subframe number with less interference in the neighboring cell. A lower number of questions.

FIG. 2 is a flowchart of Embodiment 1 of a method for adjusting a CQI according to the present invention. As shown in FIG. 2, an executor of the method in this embodiment may be a base station to which a serving cell belongs, and the method in this embodiment may include:

Step 201: Obtain sub-frame number classification information, where the sub-frame number classification information is used to indicate that a subframe corresponding to a subframe number of a different category in the neighboring cell has different interference levels to the serving cell.

The interference level may include high interference and low interference; or the interference level may include high interference, medium interference, and low interference.

It should be noted that the interference level may also be divided into other numbers.

Optionally, step 201 may include:

Obtaining a data bearer status of each subframe number of the neighboring cell, and determining the subframe number classification information according to a data bearer state of each subframe number;

or,

Obtaining an interference level of the subframe corresponding to each subframe number of the neighboring cell to the serving cell, and determining, according to the interference level of the serving cell, the subframe according to the subframe corresponding to each subframe number. Number classification information.

The data bearer status may include not carrying data, carrying a small amount of data, carrying more data, and the like. For example, the data bearer state of the subframe number that is turned off (for example, the subframe number 2, 3) may be an un-beared state; the data bearer state of the subframe number 0 that carries the broadcast message may be carrying more data; The data bearer status of the subframe number (for example, subframe number 1, 4) may be to carry a small amount of data.

It should be noted that the data bearer status of the subframe number of the neighboring cell indicates that the more data carried by the subframe number, the higher the interference level of the subframe number to the serving cell. That is to say, the data bearer status of the subframe number of the neighboring cell can also indirectly reflect the interference level of the subframe number of the neighboring cell to the serving cell.

For example, for 0 to 910 subframe numbers, the subframe number classification information may be: subframe number 0, subframe number 5 is the first type; subframe number 1, subframe number 4, and subframe number 9 are the second category. ; subframe number 2, subframe number 3, subframe number 6, subframe number 7, and subframe number 8 are the third category. The interference level of each subframe number in the first class to the serving cell is high interference, and the interference level of each subframe number in the second category to the serving cell is medium interference, and each subframe number in the third category is The interference level of the serving cell is low interference.

It should be noted that when there are multiple neighboring cells in the serving cell, the data bearer status (or the interference level to the serving cell) of the same subframe number in different neighboring cells may be the same or different. When different, the data bearer status (or the interference level to the serving cell) of the same subframe number of each neighboring area needs to be comprehensively considered to determine the subframe number classification information.

Step 202: Divide at least two subframe numbers into at least two groups according to the subframe number classification information, where the at least two subframe numbers are subframe numbers of subframes that the UE reports ACK/NCK feedback; Among the at least two subframe numbers, the subframe numbers in the same group belong to the same category in the subframe number classification information, and the subframe numbers in different groups belong to different categories in the subframe number classification information. ;

For example, if the at least two subframe numbers are the subframe number 1, the subframe number 4, and the subframe number 5, the at least two subframe numbers are determined to be divided into two groups; The subframe number 1 and the subframe number 4 are included, and the other group includes the subframe number 5.

Step 203: Determine, according to the ACK/NCK feedback of the UE in the subframe corresponding to the at least two subframe numbers, the CQI adjustment amounts respectively corresponding to the at least two groups, and respectively corresponding to the at least two groups. Determining the CQI of the CQI and the CQI reported by the UE, and determining the corrected CQI corresponding to the at least two groups respectively;

Optionally, the determining, according to the ACK/NCK feedback of the UE in the subframe corresponding to the at least two subframe numbers, determining the CQI adjustment amount corresponding to the at least two groups respectively, including:

Optionally, the principle of determining the CQI adjustment amount according to the ACK/NCK feedback may be:

When the NCK is received, the CQI adjustment amount is decreased, and when the ACK is received, the CQI adjustment amount is increased.

Optionally, the determining, according to the CQI adjustment amount corresponding to the at least two groups and the CQI reported by the UE, the corrected CQI corresponding to the at least two groups respectively, including:

Step 204: Determine, according to the modified CQI corresponding to the at least two groups, the at least two sets of corresponding TB indexes, and perform scheduling of transmission resources according to the at least two sets of respectively corresponding transport block TB indexes.

Optionally, the determining, according to the modified CQI corresponding to the at least two groups, the at least two sets of corresponding TB indexes, including:

For each of the at least two groups, a TB index for each group is determined based on the corrected CQI for each group.

Wherein, determining the TB index according to the corrected CQI may include:

When the corrected CQI is an integer, the corrected CQI is used as a TB index; when the corrected CQI is a decimal, the corrected integer portion of the CQI is used as a TB index.

Optionally, the scheduling of the transmission resource according to the at least two corresponding transport block TB indexes, including:

It should be noted that, in the present invention, the serving cell and the neighboring cell should be synchronized in time.

In the prior art, the base station to which the serving cell belongs is uniformly performing CQI adjustment based on the ACK/NCK feedback on the subframe corresponding to all the subframe numbers reported by the UE; when the subframe corresponding to the molecular frame number in the middle of the serving cell is interfered by the neighboring area If the subframe corresponding to another part of the subframe number is interfered by the neighboring area, the number of NCKs fed back in the subframe corresponding to the part of the subframe number that is interfered by the neighboring area is larger than that of the neighboring area. The number of NCKs fed back in the subframe corresponding to the smaller partial subframe number is larger; and the more the CQI adjustment amount is smaller, the smaller the MCS order is smaller; therefore, all the UEs report based on the UE in the prior art. The ACK/NCK feedback on the subframe corresponding to the subframe number is used to perform CQI adjustment uniformly (that is, a unified CQI adjustment amount is calculated for all subframes in which the UE reports ACK/NCK feedback), which will lower the interference caused by the neighboring cell. The MCS order of the subframe corresponding to the smaller subframe number; therefore, there is a problem that the MCS order of the subframe corresponding to the subframe number with less neighboring interference is lower in the prior art; and the MCS order is smaller. The amount of data that can be transmitted is less; therefore, it is also stored in the prior art. Less interference by neighboring subframe number corresponding to a downlink subframe problem of insufficient throughput.

In the present invention, the classification information is used according to the subframe number (the subframe number classification information is used to indicate that the subframe corresponding to the subframe number of the different category in the neighboring cell has different interference levels to the serving cell) At least two subframe numbers that are reported by the UE to report ACK/NCK feedback are divided into at least two groups; wherein the subframe numbers in the same group belong to the same category in the subframe number classification information, and the subframes in different groups The number of the sub-frame number classification information belongs to different categories; and the CQI adjustment amount corresponding to the at least two groups is determined according to the ACK/NCK feedback of the UE on the subframe corresponding to the at least two subframe numbers respectively. And determining, according to the at least two sets of corresponding CQI adjustment amounts and the CQIs reported by the UE, the at least two sets of corrected CQIs respectively; and according to the at least two sets of corresponding corrected CQIs, And determining, by the at least two groups of corresponding TB indexes, the scheduling of the transmission resource according to the at least two sets of respectively corresponding transport block TB indexes; and enabling the UE to report the ACK/NCK subframe according to the subframe number classification information. Subframe number Row grouping, the subframe number in the same group has the same interference level to the serving cell, and the subframe number in different groups has different interference levels to the serving cell; and the corresponding CQI adjustment amount is determined for each group separately; The MCS order of the subframe corresponding to the subframe number with less interference is not lower by the subframe corresponding to the subframe number of the different group that is interfered by the neighboring area; the sub-frame with less interference from the neighboring area is improved. The MCS order of the subframe corresponding to the frame number. Therefore, the problem that the MCS order of the subframe corresponding to the subframe number with less interference in the neighboring area is lower in the prior art is solved, and the problem that the interference in the neighboring area is small in the prior art is also solved. The problem that the downlink throughput rate of the subframe corresponding to the frame number is insufficient.

FIG. 3 is a flowchart of Embodiment 2 of a method for adjusting a CQI according to the present invention. As shown in FIG. 3, the method in this embodiment may include:

Step 301: The first base station turns off the subframe numbers 2, 3, 6, 7, and 8 in the neighboring cell that do not need to send the user data, where the first base station is the base station to which the neighboring cell belongs;

Step 302: The second base station acquires the subframe number classification information, where the

subframe number

0, 5 is one type, the subframe numbers 1, 4, and 9 are one type, and the subframe number is 2, 3, 6, 7, 8 are a class; the second base station is a base station to which the serving cell belongs;

Optionally, the acquiring, by the second base station, the subframe number classification information may include:

The first base station sends the subframe number classification information to the second base station; or the second base station determines the subframe number classification information according to the configuration information input by the user.

It should be noted that since the

subframe numbers

0 and 5 in the neighboring area are used to transmit the broadcast message, the serving cell has high interference; the subframe numbers 2, 3, 6, 7, and 8 are turned off (that is, in the some The power amplifier is turned off during the subframe number period, and therefore has low interference to the serving cell; the remaining subframe numbers 1, 4, and 9 interfere with the serving cell.

It should be noted that the first base station and the second base station may be different base stations, or may be the same base station.

Step 303: The second base station divides the subframe numbers 1, 2, 3, 4, 6, 7, 8, and 9 of the subframe reported by the UE to the ACK/NCK according to the subframe number classification information. a group and a second group; wherein the first group includes subframe numbers 1, 4, 9, and the second group includes subframe numbers 2, 3, 6, 7, 8;

Step 304: The second base station determines, according to the ACK/NCK feedback of the UE in a subframe with subframe numbers 1, 4, and 9, the CQI adjustment amount of the first group, and according to the UE in the sub- Determining the CQI adjustment amount of the second group by using ACK/NCK feedback on subframes of frame numbers 2, 3, 6, 7, and 8;

It should be noted that the ACK/NCK feedback when determining the CQI adjustment amount of the first group or the CQI adjustment amount of the second group may be a statistical value of ACK/NCK feedback in a period of time.

Step 305: The second base station determines, according to the CQI adjustment amount of the first group and the CQI reported by the UE, the corrected CQI of the first group, and according to the CQI adjustment amount of the second group. Determining, by the CQI reported by the UE, the corrected CQI of the second group;

Optionally, the determining, by the first base station, the corrected CQI of the first group according to the CQI adjustment quantity of the first group and the CQI reported by the UE, including:

The first base station determines the sum of the CQI adjustment amount of the first group and the CQI reported by the UE as the corrected CQI of the first group.

It should be noted that when the UE reports multiple CQIs, the CQI of the CQI that is last reported by the UE may be used to determine the CQI, or the CQI that was last reported by the UE and the last time may be used. The filtered value of the previously reported CQI is used to determine the corrected CQI.

Step 306: The second base station determines, according to the modified CQI of the first group, the TB index of the first group, and determines the TB index of the second group according to the corrected CQI of the second group. ;

Step 307: The second base station, in the RBs allocated to the UE, performs scheduling of transmission resources according to the TB index of the first group for a subframe whose subframe number belongs to the first group, and the subframe number is used. The subframes belonging to the second group perform scheduling of transmission resources according to the TB index of the second group.

In this embodiment, the subframe number of the subframe in which the UE reports the ACK/NCK feedback is classified into the first group and the second group according to the subframe number classification information; and the CQI adjustments of the first group and the second group are respectively determined. On the basis of the quantity, the corrected CQIs of the first group and the second group are respectively determined; the TB indexes of the first group and the second group are further determined respectively; and further according to the TB indexes corresponding to the first group and the second group respectively The scheduling of the transmission resource is such that the MCS order of the subframe corresponding to the subframe number that is less interfered by the neighboring cell is not pulled lower by the subframe corresponding to the subframe number of the different group that is interfered by the neighboring area; The MCS order of the subframe corresponding to the subframe number with less interference in the neighboring cell solves the problem that the MCS order of the subframe corresponding to the subframe number with less neighboring interference is lower in the prior art.

Laboratory scenario: one UE in the serving cell, the serving cell has two neighboring cells, and the three cells belong to the same base station, and the physical cell identifier (PCI, Physical Cell Identifier) of each cell does not conflict; the serving cell is fully loaded, adjacent The area is idling, and the subframe number classification information is as described in step 302.

When the method of the present invention is turned on or off, the corresponding signal to interference plus noise ratio (SINR, Signal to Interference plus Noise Ratio) (ie, position), respectively, the corresponding MCS order and downlink throughput rate results are shown in Table 1. Show.

Table 1

As can be seen from Table 1, in the laboratory scenario, the present invention improves the downlink throughput rate compared to the prior art.

It should be noted that when the SINR is greater than 20 db in Table 1, the near point can be considered, and the SINR can be regarded as the midpoint when the SINR is between 10 db and 20 db, and the time point can be considered when the SINR is less than 10 db.

External field scenario: two stations, time synchronization between stations; there is one UE in the serving cell, the serving cell has two neighboring cells, and the PCI mode 3 does not conflict between the cells; wherein the serving cell and one of the neighboring cells belong to one site The other neighboring area belongs to another station; the serving cell is fully loaded, the neighboring area is unloaded, and the subframe number classification information is as described in step 302.

When the method of the present invention is turned on or off, the corresponding MCS order and downlink throughput rate results under different SINRs are shown in Table 2.

Table 2

本发明的方法状态Method state of the invention	平均SINRAverage SINR	平均MCS阶数Average MCS order	平均下行吞吐率Average downlink throughput
本发明的方法状态Method state of the invention	平均SINRAverage SINR	平均MCS阶数Average MCS order	平均下行吞吐率Average downlink throughput	关闭shut down	13.8413.84	21.2821.28	28001.1228001.12
打开turn on	14.0314.03	23.1123.11	33090.4733090.47	关闭shut down	13.8413.84	21.2821.28	28001.1228001.12

As can be seen from Table 2, in the external field scenario, the present invention improves the downlink throughput rate compared to the prior art.

It should be noted that the units of SINR in Tables 1 and 2 are db, and the unit of downlink throughput is kpbs.

4 is a graph showing the relationship between the SINR and the downlink throughput rate in the external field scenario of the present invention. In FIG. 4, the horizontal axis represents the SINR, and the vertical axis represents the downlink throughput rate. As can be seen from Fig. 4, the present invention improves the downlink throughput rate compared to the prior art under the same SINR.

FIG. 5 is a graph showing the relationship between the SINR and the MCS order in the external field scenario of the present invention; in FIG. 5, the horizontal axis represents the SINR, and the vertical axis represents the MCS order. As can be seen from Fig. 5, the present invention improves the MCS order compared to the prior art under the same SINR.

It should be noted that the units of SINR in FIG. 4 and FIG. 5 are db, and the unit of downlink throughput is kpbs.

FIG. 6 is a schematic structural diagram of Embodiment 1 of a CQI adjusting apparatus according to the present invention; the apparatus is applied to a Long Term Evolution (LTE) system, where the LTE system includes a serving cell where a user equipment UE is located, and a neighboring area of the serving cell. The serving cell is time synchronized with the neighboring cell; the device is a base station to which the serving cell belongs. As shown in FIG. 6, the device in this embodiment may include: an obtaining module 601, a grouping module 602, and a CQI adjustment amount determining module. 603. A scheduling module 604. The obtaining module 601 is configured to obtain the subframe number classification information, where the subframe number classification information is used to indicate that the subframe corresponding to the subframe number of the different category in the neighboring cell has different interference levels to the serving cell. The grouping module 602 is configured to divide the at least two subframe numbers into at least two groups according to the subframe number classification information, where the at least two subframe numbers are the ACK/negative acknowledgement NCK feedback reported by the UE a subframe number of the subframe; among the at least two subframe numbers, the subframe numbers in the same group belong to the same category in the subframe number classification information, and the subframe numbers in different groups are in the subframe The CQI adjustment amount determining module 603 is configured to determine, according to the ACK/NCK feedback of the UE in the subframe corresponding to the at least two subframe numbers, that the at least two groups respectively correspond to each other. And determining, according to the at least two sets of corresponding CQI adjustment amounts and the CQIs reported by the UE, the at least two sets of corrected CQIs respectively; the scheduling module 604, configured to use the at least two Group corresponding repair After the CQI, determining the at least two sets of transport block TB corresponding to each index; and scheduling transmission resources according to the transmission block TB index corresponding to each of said at least two groups.

Optionally, the obtaining module 601 is configured to obtain a data bearer state of each subframe number of the neighboring cell, and determine the subframe number classification information according to the data bearer state of each subframe number; or, obtain The interference level of the subframe corresponding to each subframe number of the neighboring cell to the serving cell, and determining the subframe number according to the interference level of the serving cell by the subframe corresponding to each subframe number. Classified information.

Optionally, the CQI adjustment quantity determining module 603 determines, according to the ACK/NCK feedback of the UE in the subframe corresponding to the at least two subframe numbers, the CQI adjustment amount corresponding to the at least two groups, which specifically includes:

Optionally, the CQI adjustment quantity determining module 603 determines, according to the at least two groups of the corresponding CQI adjustment amounts and the CQIs that are reported by the UE, the at least two groups of the corrected CQIs, which are specifically:

Optionally, the scheduling module 604 performs scheduling of the transmission resource according to the at least two groups of the corresponding transport block TB indexes, which specifically includes:

The device of this embodiment can be used to implement the technical solutions of FIG. 2 and FIG. 3, and the implementation principle and technical effects thereof are similar, and details are not described herein again.

FIG. 7 is a schematic structural diagram of Embodiment 2 of a CQI adjusting apparatus according to the present invention; the apparatus is applied to a Long Term Evolution (LTE) system, where the LTE system includes a serving cell where a user equipment UE is located, and a neighboring area of the serving cell. The serving cell is time-synchronized with the neighboring cell; the device is a base station to which the serving cell belongs. As shown in FIG. 7, the device in this embodiment may include: a processor 701 and a memory 702. The apparatus can also include a transmitter 703 and a receiver 704. Transmitter 703 and receiver 704 can be coupled to processor 701. The transmitter 703 is configured to transmit data or information, the receiver 704 is configured to receive data or information, the memory 702 stores execution instructions, when the device is running, the processor 701 communicates with the memory 702, and the processor 701 calls the memory 702. Execution instructions for performing the following operations:

Determining, according to the ACK/NCK feedback of the UE on the subframe corresponding to the at least two subframe numbers, respectively, the at least two groups of CQI adjustment amounts respectively; and according to the at least two groups of corresponding CQI adjustment amounts respectively And determining, by the CQI reported by the UE, the correction corresponding to the at least two groups respectively After CQI;

Optionally, the acquiring the subframe number classification information includes:

or,

One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above may be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: ROM, RAM, disk, or optical disk, and the like, which can store program codes. Medium.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or replacements do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A method for adjusting a channel quality indication CQI, wherein the method is applied to a Long Term Evolution (LTE) system, where the LTE system includes a serving cell where a user equipment UE is located, and a neighboring area of the serving cell, the service The cell is time synchronized with the neighboring cell; the method is performed by a base station to which the serving cell belongs, and the method includes:

Obtaining subframe number classification information, where the subframe number classification information is used to indicate that a subframe corresponding to a subframe number belonging to a different category in the neighboring cell has different interference levels to the serving cell;

Decoding, according to the subframe number classification information, at least two subframe numbers into at least two groups; wherein the at least two subframe numbers are subframe numbers of subframes in which the UE reports ACK/negative acknowledgement NCK feedback; Among the at least two subframe numbers, the subframe numbers in the same group belong to the same category in the subframe number classification information, and the subframe numbers in different groups belong to different categories in the subframe number classification information. ;

Determining, according to the ACK/NCK feedback of the UE on the subframe corresponding to the at least two subframe numbers, respectively, the at least two groups of CQI adjustment amounts respectively; and according to the at least two groups of corresponding CQI adjustment amounts respectively And determining, by the CQI reported by the UE, the corrected CQI corresponding to the at least two groups respectively;

And determining, according to the modified CQI corresponding to the at least two groups, the at least two sets of respectively corresponding transport block TB indexes; and performing scheduling of the transmission resources according to the at least two sets of respectively corresponding transport block TB indexes.
The method according to claim 1, wherein the acquiring the subframe number classification information comprises:

Obtaining a data bearer status of each subframe number of the neighboring cell, and determining the subframe number classification information according to a data bearer state of each subframe number;

or,

Obtaining an interference level of the subframe corresponding to each subframe number of the neighboring cell to the serving cell, and determining, according to the interference level of the serving cell, the subframe according to the subframe corresponding to each subframe number. Number classification information.
The method according to claim 1 or 2, wherein the determining, according to the ACK/NCK feedback of the UE in the subframe corresponding to the at least two subframe numbers, respectively, determining that the at least two groups respectively correspond to CQI adjustments, including:

For each of the at least two groups, determining CQI of each group according to ACK/NCK feedback on the subframe corresponding to the subframe number of each group in the at least two subframe numbers Adjustment amount.
The method according to any one of claims 1 to 3, wherein the determining the correction corresponding to the at least two groups according to the CQI adjustment amount corresponding to the at least two groups and the CQI reported by the UE After the CQI, including:

For each of the at least two groups, the corrected CQI of each group is determined according to the CQI adjustment amount of each group and the CQI.
The method according to any one of claims 1 to 4, wherein the scheduling of the transmission resource according to the at least two corresponding transport block TB indexes comprises:

In the resource block RB allocated to the UE, the subframe in which the subframe number belongs to any one of the at least two groups performs scheduling of the transmission resource according to the TB index of the any group.
An apparatus for adjusting channel quality indication CQI, wherein the apparatus is applied to a Long Term Evolution (LTE) system, where the LTE system includes a serving cell where a user equipment UE is located, and a neighboring area of the serving cell, the service The cell is synchronized with the neighboring cell; the device is a base station to which the serving cell belongs, and the device includes:

An acquiring module, configured to acquire subframe number classification information, where the subframe number classification information is used to indicate that a subframe corresponding to a subframe number belonging to a different category in the neighboring cell has different interference levels to the serving cell;

a grouping module, configured to divide at least two subframe numbers into at least two groups according to the subframe number classification information, where the at least two subframe numbers are subframes in which the UE reports an acknowledgement ACK/negative acknowledgement NCK feedback a subframe number of the at least two subframe numbers, the subframe numbers in the same group belong to the same category in the subframe number classification information, and the subframe numbers in different groups are classified in the subframe number. The information belongs to different categories;

a CQI adjustment amount determining module, configured to determine, according to the ACK/NCK feedback of the UE on the subframe corresponding to the at least two subframe numbers, respectively, the at least two groups of CQI adjustment amounts respectively; and according to the at least Determining, by the two groups, the CQI adjustment amount and the CQI reported by the UE, respectively, determining the corrected CQI corresponding to the at least two groups respectively;

a scheduling module, configured to determine, according to the at least two sets of corrected CQIs, respectively, the at least two sets of corresponding transport block TB indexes; and according to the at least two groups of corresponding transmissions respectively The block TB index performs scheduling of transmission resources.
The device according to claim 6, wherein the obtaining module is specifically configured to:

Obtaining a data bearer status of each subframe number of the neighboring cell, and determining the subframe number classification information according to a data bearer state of each subframe number;

or,

Obtaining an interference level of the subframe corresponding to each subframe number of the neighboring cell to the serving cell, and determining, according to the interference level of the serving cell, the subframe according to the subframe corresponding to each subframe number. Number classification information.
The apparatus according to claim 6 or 7, wherein the CQI adjustment amount determining module determines the at least the ACK/NCK feedback on the subframe corresponding to the at least two subframe numbers of the UE. The corresponding CQI adjustments of the two groups include:

For each of the at least two groups, determining CQI of each group according to ACK/NCK feedback on the subframe corresponding to the subframe number of each group in the at least two subframe numbers Adjustment amount.
The device according to any one of claims 6 to 8, wherein the CQI adjustment amount determining module determines the at least two according to the CQI adjustment amount corresponding to the at least two groups and the CQI reported by the UE. The corrected CQI corresponding to the group respectively includes:

For each of the at least two groups, the corrected CQI of each group is determined according to the CQI adjustment amount of each group and the CQI.
The apparatus according to any one of claims 6 to 9, wherein the scheduling module performs scheduling of transmission resources according to the at least two sets of transport block TB indexes respectively corresponding to the at least two groups, which specifically includes:

In the resource block RB allocated to the UE, the subframe in which the subframe number belongs to any one of the at least two groups performs scheduling of the transmission resource according to the TB index of the any group.