WO2019028907A1

WO2019028907A1 - Channel quality indicator reporting method and related apparatus

Info

Publication number: WO2019028907A1
Application number: PCT/CN2017/097260
Authority: WO
Inventors: 孙彦良; 赵毅男; 刘斌; 杨育波
Original assignee: 华为技术有限公司
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2019-02-14
Also published as: CN109923922A; CN109923922B

Abstract

The present disclosure relates to the technical field of communications, and particularly to a channel quality indicator (CQI) reporting method and a related apparatus. The method comprises: a terminal reports a differential channel quality indicator determined based on a median and an absolute CQI of a second code word, wherein the median and the absolute CQI of the second code word are calculated based on a network device configuration, and the network configuration comprises an absolute CQI rank configuration of a first code word and one or more of the following three items: an absolute CQI rank configuration of the second code word, a median configuration or offset value, and a differential CQI rank configuration. By implementing embodiments of the present application, when a downlink is a static link, that is, the difference in an absolute CQI between code words is large, a base station is able to more accurately ascertain an absolute CQI of a code word, so as to adjust downlink modulation and coding modes, thereby achieving better system performance.

Description

Channel quality indication reporting method and related equipment

Technical field

The present application relates to the field of communications technologies, and in particular, to a channel quality indication reporting method and related devices.

Background technique

Multi Input Multi Output (MIMO) technology is a major breakthrough in smart antenna technology in the field of wireless mobile communications. This technology can double the capacity and spectrum utilization of communication systems without increasing bandwidth. The key technology that must be adopted in a generation of mobile communication systems. In the MIMO system, the base station can adjust the downlink modulation and coding mode by referring to the absolute channel quality indicator (CQI) of the codeword to achieve better system performance, wherein the codeword is a codeword included in the downlink data. .

Generally, if the downlink data includes two codewords (the first codeword and the second codeword), the terminal may report the absolute CQI of the first codeword and the differential CQI of the second codeword, where the second codeword The differential CQI is calculated as follows based on the difference between the absolute CQI of the first codeword and the absolute CQI of the second codeword. The base station may determine the absolute CQI of each codeword according to the reported absolute CQI and the differential CQI, thereby adjusting the downlink modulation and coding mode according to determining the absolute CQI of each codeword.

The differential CQI of the second codeword = the absolute CQI of the first codeword - the absolute CQI of the second codeword

However, the standard stipulates that the absolute CQI level definition can be a 16-level definition table as shown in Table 1, Table 2 or Table 3. The differential CQI level configuration can be as defined in Table 4 with only 8 levels. form. It can be seen from Table 3 that the larger the calculated differential CQI is, or the larger the absolute CQI difference between the two codewords is, or the greater the difference between the signal-to-noise ratios of the two codewords (the absolute CQI of the codeword) The signal-to-noise ratio of the codeword has a mapping relationship. The mapping of the calculated differential CQI to the CQI sequence of Table 3 (the actually reported differential CQI) according to Table 4 cannot accurately reflect the difference of the codeword, that is, the base station reports according to the difference. The more inaccurate the absolute CQI determined by the differential CQI, the lower the accuracy of the base station's adjustment of the downlink modulation and coding scheme based on the reported CQI.

For example, the level configuration of the absolute CQI is as shown in Table 1, and the level configuration of the differential CQI is as shown in Table 4. The absolute CQI calculated by the first codeword with reference to Table 1 is 15, and the second codeword is calculated with reference to Table 1. CQI is 14, differential CQI of the second codeword = absolute CQI of the first codeword - absolute CQI = 1 of the second codeword, and differential CQI of the second codeword with reference to the CQI sequence of Table 4, that is, the differential CQI is 1, The base station calculates, according to the reported differential CQI(1) and the absolute CQI (15) of the first codeword reference, that the absolute CQI of the second codeword is 14, accurately reflecting the absolute CQI of the first codeword and the second codeword; However, when the absolute CQI of the second codeword is 1, the differential CQI of the second codeword = the absolute CQI of the first codeword - the absolute CQI of the second codeword = 14, and the differential CQI of the second codeword refers to Table 4. The CQI sequence number is the differential CQI of 3. The base station calculates the absolute CQI of the second codeword to be 12 according to the reported differential CQI (3) and the absolute CQI (15) of the first codeword reference, and the second code determined by the terminal. The absolute CQI of the word is 1 and does not accurately reflect the absolute CQI of the first codeword and the second codeword.

Therefore, there is an urgent need to solve the problem that when the downlink is a static link, that is, the absolute CQI of the codeword is relatively large, how to make the CQI report better adapt to the channel environment corresponding to the current two codewords, thereby enabling The network device adjusts the downlink modulation and coding modes more accurately to achieve better system performance.

Summary of the invention

The present application proposes a channel quality indication reporting method and related equipment. When the downlink is a static link, that is, the absolute CQI of the codewords is relatively large, the base station can more accurately understand the absolute CQI of the codeword to adjust. Downstream modulation and coding to achieve better system performance.

In a first aspect, a channel quality indication reporting method is provided, including:

The terminal reports a differential channel quality indicator CQI, and the differential CQI is determined based on a median value and an absolute CQI of the second codeword;

The absolute CQI of the median and the second codeword is calculated based on the network device configuration, and the network configuration includes an absolute CQI level configuration of the first codeword and one or more of the following three items:

Absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.

In one possible design, when the network configuration includes an absolute CQI level configuration of the second codeword, the absolute CQI level configuration of the second codeword is different from the absolute CQI level configuration of the first codeword, and the median and the second The calculation of the codeword absolute CQI is based on the absolute CQI level configuration of the second codeword.

In yet another possible design, when the network configuration does not include a median configuration and an offset value, the calculation of the median is based on the absolute CQI of the first codeword, wherein the absolute CQI of the first codeword is based on the first code The absolute CQI level configuration of the word is determined.

In yet another possible design, when the network configuration includes an absolute CQI level configuration of the second codeword, and the network configuration does not include the median configuration and the offset value, the median is the absolute CQI level configuration of the second codeword. The CQI sequence number of the spectral efficiency corresponding to the absolute CQI of the first codeword in the absolute CQI level configuration of the first codeword.

In yet another possible design, when the network configuration includes a median configuration, the median takes the value of the median configuration.

In yet another possible design, when the network configuration includes an offset value, the calculation of the median is based on the sum or difference of the absolute CQI of the first codeword and the offset value, wherein the absolute CQI of the first codeword is based on The absolute CQI level configuration of a codeword is determined.

In yet another possible design, when the network configuration includes an absolute CQI level configuration of the second codeword, and the network configuration includes an offset value, the median is the absolute CQI level configuration of the second codeword, closest to the first The CQI sequence number of the spectral efficiency corresponding to the sum or difference of the offset value of the absolute CQI level configuration of the codeword and the absolute CQI of the first codeword.

In yet another possible design, when the network configuration does not include the absolute CQI level configuration of the second codeword, and the network configuration includes the offset value, the median is the sum of the absolute CQI and the offset value of the first codeword and or difference.

In yet another possible design, when the network configuration includes a differential CQI level configuration, the difference CQI is the difference between the median value and the second codeword absolute CQI, which is obtained based on the differential CQI level configuration.

In yet another possible design, the terminal may also report the differential CQI through the subframe configured by the network device.

The configuration information may be semi-statically configured by using a radio resource control message.

It can be seen that, when calculating the differential CQI, the present application is calculated based on the absolute CQI of the median and the second codeword, wherein the median value may be configured by the network, or based on the absolute CQI level configuration and the first codeword. Instead of directly calculating the absolute CQI of the first codeword and the absolute CQI of the second codeword, the absolute CQI level configuration of the two codewords or one or more of the differential CQI level configurations is determined, When the downlink is a static link, that is, the absolute CQI of the codewords is different, the network configuration is configured to better adapt the CQI reporting to the channel environment corresponding to the current two codewords, thereby allowing the network device to More accurate adjustment of the downstream modulation and coding methods to achieve better system performance.

In a second aspect, another method for reporting a channel quality indicator is provided, including:

The network device sends configuration information, where the configuration information includes one or more of the following three items in the absolute CQI level of the first codeword:

Absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.

The absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword may be different. The configuration information is also used to configure a subframe used by the terminal to report the differential CQI, wherein the differential CQI is determined based on the configuration information.

In a third aspect, another method for reporting a channel quality indicator is provided, including:

The network device sends configuration information to the terminal, where the configuration information may include a median configuration and an absolute CQI level configuration of the second codeword;

The terminal reports the differential CQI of the second codeword, and the differential CQI of the second codeword is determined based on the absolute CQI of the median and the second codeword, where the median is the value of the median configuration, and the absolute CQI of the second codeword is Determined based on the absolute CQI level configuration of the second codeword.

In a fourth aspect, a terminal is provided, the terminal comprising a module or unit for performing the channel quality indication reporting method of the above first aspect.

In a fifth aspect, a network device is provided, the network device comprising a module or unit for performing channel quality indication reporting of the second aspect above.

In a sixth aspect, a terminal is provided, the terminal comprising a processor, a communication module and a memory, the memory for storing instructions. The processor's instructions for reading the memory perform the channel quality indication reporting method of the first aspect above.

In a seventh aspect, a network device is provided. The network device includes a processor, a communication module, and a memory, and the memory is configured to store instructions. The processor's instructions for reading the memory perform the channel quality indication reporting method of the second aspect above.

In an eighth aspect, a computer storage medium is provided for storing computer software instructions for use in the terminal, comprising a program designed to perform the first aspect described above.

In a ninth aspect, a computer storage medium is provided for storing computer software instructions for use in the network device, comprising a program designed to perform the second aspect described above.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below.

1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

2A is a schematic flowchart of a differential CQI reporting method according to an embodiment of the present application;

2B is a schematic flowchart of still another method for reporting a differential CQI according to an embodiment of the present application;

2C is a schematic flowchart of still another method for reporting a differential CQI according to an embodiment of the present application;

2D is a schematic flowchart of still another method for reporting a differential CQI according to an embodiment of the present application;

FIG. 3 is a subframe set of a subframe for reporting a differential CQI by a terminal according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present application;

6 is a schematic structural diagram of still another terminal according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of still another network device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments.

1 is a schematic structural diagram of a communication system according to an embodiment of the present application. The communication system 100 includes a network device 101 and a terminal 102. The network device 101 and the terminal 102 communicate through air interfaces. among them:

The network device 101 may be a network device in a new wireless technology (New Radio, NR), or may be a 3G (such as a Universal Mobile Telecommunications System (UMTS), Wideband Code Division Multiple Access (Wideband Code Division Multiple Access). (WCDMA), Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system base station (NodeB, NB), may also be in Long Term Evolution (LTE) system Evolved Node B (eNB).

Terminal 102 may be referred to as a mobile station, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The terminal 102 can also be a cellular telephone, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, an in-vehicle device, a wearable device, and a mobile station in a future 5G network or a public land mobile network that is evolving in the future ( Public Land Mobile Network, PLMN) Terminal equipment in the network, etc.

In the application scenario of the present application, the network device 101 may send a channel state information reference signal (CSI-RS) and/or a synchronization signal (synchronization) to the terminal 102 by using a multi-codeword space division multiplexing manner. Signal, SS). The terminal 102 measures the reference signal CSI-RS and/or the synchronization signal SS, calculates a CQI for each codeword and reports it, so that when the downlink is a static link, that is, when the absolute CQI of the codeword is different, The absolute CQI of the codeword can be more accurately understood to adjust the downlink modulation and coding mode to achieve better system performance.

Embodiment 1:

FIG. 2A is a schematic flowchart of still another method for reporting differential CQI provided by the present application. As shown in FIG. 2A, the method may include:

S201a: The network device sends configuration information to the terminal, where the terminal receives configuration information sent by the network device, where the configuration information may include a median configuration and an absolute CQI level configuration of the first codeword.

S202b: The terminal reports a differential CQI of the second codeword, where the differential CQI of the second codeword is determined based on a median value and an absolute CQI of the second codeword.

It should be noted that, in the embodiment of the present application, description is made on whether the configuration information may further include an absolute CQI level configuration of the second codeword. The absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword may be a definition table for calculating an absolute CQI of the first codeword and an absolute CQI reference of the second codeword, respectively, and selecting a CQI sequence number.

Case 1: The configuration information does not include the absolute CQI level configuration of the second codeword.

The terminal may calculate and report the absolute CQI of the first codeword based on the absolute CQI level configuration of the first codeword. For the second codeword, when calculating the absolute CQI of the second codeword, the same absolute CQI level configuration, ie, the absolute CQI level configuration of the first codeword, can be calculated based on the absolute CQI of the first codeword. The differential CQI of the second codeword may be the difference between the median (ie, the median configuration) and the absolute CQI of the second codeword.

For example, the absolute CQI level of the first codeword is configured as Table 1. The first codeword can be selected according to Table 1 (based on the signal-to-noise ratio of the first codeword, which is not described herein again). The CQI sequence number is reported as the absolute CQI of the first codeword, and the second codeword can also be based on the first code. The absolute CQI of the word calculates the same absolute CQI level configuration, Table 1, and calculates the absolute CQI of the second codeword. If the median value of the network device configuration is 8 and the absolute CQI of the second codeword calculated based on Table 1 is 10, the difference CQI of the second codeword is the median value - the absolute CQI of the second codeword =8-10=-2.

Table 1 Absolute CQI Level Definition 1

As another example, the absolute CQI level of the first codeword is configured as Table 2. The first codeword can be selected according to Table 2 (based on the signal-to-noise ratio of the first codeword, which is not described herein again), the CQI sequence number is reported as the absolute CQI of the first codeword, and the second codeword can also be based on the first code. The absolute CQI of the word calculates the same absolute CQI level configuration, Table 2, and calculates the absolute CQI of the second codeword. If the median value of the network device configuration is 8 and the absolute CQI of the second codeword calculated based on Table 2 is 10, the differential CQI of the second codeword = the median value - the absolute CQI of the second codeword =8-10=-2.

Table 2 Absolute CQI Level Definition 2

Case 2: The configuration information includes an absolute CQI level configuration of the second codeword.

The terminal may calculate and report the absolute CQI of the first codeword based on the absolute CQI level configuration of the first codeword. The absolute CQI of the second codeword can be calculated based on the absolute CQI level configuration of the second codeword. The differential CQI of the second codeword may be the difference between the median (ie, the median configuration) and the absolute CQI of the second codeword.

For example, the absolute CQI level of the first codeword is configured as Table 1. The first codeword can refer to Table 1 to select the CQI sequence number as the absolute CQI of the first codeword and report it. The absolute CQI level of the second codeword is configured as Table 3. The second codeword can refer to Table 3 to select the CQI sequence number as the absolute CQI of the second codeword. If the median configuration of the network device is configured to 8, the second code The absolute CQI of the second codeword calculated based on Table 3 is 8, and the difference CQI of the second codeword = median - the absolute CQI of the second codeword = 8-8=0.

Table 3 Absolute CQI Level Definition 3

It should be noted that the differential CQI of the second codeword calculated by the embodiment of the present application is not the differential CQI actually reported by the terminal. In practice, after calculating the differential CQI, the terminal may further query the CQI sequence number corresponding to the calculated differential CQI from the differential CQI level definition, and report the queried CQI sequence number to the network device as a differential CQI, where the difference is The CQI level definition can be system default or network device configuration.

Specifically, if the network device sends configuration information to the terminal that does not include a differential CQI level configuration, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the system default differential CQI level definition, and use the queried CQI sequence number as a difference. The CQI is reported to the network device. If the network device sends the configuration information to the terminal, including the differential CQI level configuration, the terminal may determine the differential CQI level definition from the differential CQI level configuration configured by the network device, and query the CQI sequence number corresponding to the calculated differential CQI, and then query the The CQI sequence number is reported to the network device as a differential CQI.

For example, the system default differential CQI level definition can be as shown in Table 4. If the network device sends configuration information to the terminal does not include a differential CQI level configuration, the terminal can query the calculated CQI sequence number corresponding to the differential CQI from Table 4, and The queried CQI sequence number is reported to the network device as a differential CQI. That is, if the difference CQI of the second codeword calculated above is -2, the terminal may query the calculated CQI sequence number 6 corresponding to the differential CQI from Table 4, and use the queried CQI sequence number 6 as the second codeword. The differential CQI is reported to the network device.

For another example, if the network device sends the configuration information to the terminal including the differential CQI level configuration, and the configured differential CQI level is defined as Table 5, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the table 5 of the network device configuration. And the queried CQI sequence number is reported to the network device as a differential CQI. That is, if the difference CQI of the second codeword calculated above is -2, the terminal may query the calculated CQI sequence number 6 corresponding to the differential CQI from Table 5, and query The received CQI sequence number 6 is reported to the network device as the differential CQI of the second codeword.

For another example, if the network device sends the configuration information to the terminal including the differential CQI level configuration, and the configured differential CQI level is defined as Table 6, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the table 6 of the network device configuration. And the queried CQI sequence number is reported to the network device as a differential CQI. That is, if the difference CQI of the second codeword calculated above is -2, the terminal may query the calculated CQI sequence number 6 corresponding to the differential CQI from Table 6, and use the queried CQI sequence number 6 as the second codeword. The differential CQI is reported to the network device.

Table 4 Differential CQI Level Definition 1 (System Default)

CQI序号CQI serial number	偏置计算值Offset calculation
00	00
11	11
22	22
33	≥3≥3
44	≤-4≤-4
55	-3-3
66	-2-2
77	-1-1

Table 5 Differential CQI Level Definition 2

CQI序号CQI serial number	偏置计算值Offset calculation
00	00
11	11
22	22
33	33
44	44
55	≥5≥5
66	≤-2≤-2
77	-1-1

Table 6 Differential CQI Level Definition 3

CQI序号CQI serial number	偏置计算值Offset calculation
00	00
11	11
22	≥2≥2
33	≤-5≤-5
44	-4-4
55	-3-3
66	-2-2

7

-1

Optionally, the configuration information may be configured to be used by the terminal to report the subframe used by the differential CQI, so that the terminal reports the differential CQI through the configured subframe. For example, FIG. 3 is a subframe set of a subframe in which a terminal reports a differential CQI. As shown in FIG. 3, the subframe set includes subframes CSISubframeSet_1 and CSISubframeSet_2, and when the configuration information indicates that CSISubframeSet_1 is a subframe for reporting differential CQI, the terminal The differential CQI can be reported by the CSISubframeSet_1 shown in FIG. 3; when the configuration information indicates that the CSISubframeSet_2 is a subframe for reporting the differential CQI, the terminal can report the differential CQI through the CSISubframeSet_2 shown in FIG. 3.

It should be noted that the configuration information in the embodiment of the present application may be semi-statically configured through a Radio Resource Control (RRC) message.

It can be seen that, when calculating the differential CQI, the present application is calculated based on the absolute CQI of the median and the second codeword, wherein the median value and the absolute CQI of the second codeword are based on the median configuration of the network device configuration and the The absolute CQI level configuration of one codeword or the absolute CQI level configuration of the second codeword is determined instead of being based directly on the absolute CQI of the first codeword and the absolute CQI of the second codeword, which can be when the downlink is When the static link, that is, the absolute CQI of the codewords is different, the network configuration is configured to better adapt the CQI reporting to the channel environment corresponding to the current two codewords, thereby allowing the network device to adjust the downlink more accurately. Modulation and coding to achieve better system performance.

Embodiment 2:

FIG. 2B is a schematic flowchart of still another method for reporting differential CQI provided by the present application. As shown in FIG. 2B, the method may include:

S201c: The network device sends configuration information to the terminal, where the terminal receives configuration information sent by the network device, where the configuration information may include an offset value and an absolute CQI level configuration of the first codeword.

S202d: The terminal reports a differential CQI of the second codeword, where the differential CQI of the second codeword is determined based on a median value and an absolute CQI of the second codeword.

The terminal may calculate and report the absolute CQI of the first codeword based on the absolute CQI level configuration of the first codeword. For the second codeword, the differential CQI of the second codeword may be the difference between the absolute CQI of the median value and the second codeword, wherein the median value may be the offset value plus the absolute CQI of the first codeword, The differential CQI of the second codeword can be as shown in the following equation. When calculating the absolute CQI of the second codeword, the same absolute CQI level configuration, that is, the absolute CQI of the first codeword, can also be calculated based on the absolute CQI of the first codeword. Level configuration.

The differential CQI of the second codeword = the absolute CQI of the first codeword + the offset value - the absolute CQI of the second codeword

Optionally, for the second codeword, the differential CQI of the second codeword may be the difference between the absolute CQI of the median value and the second codeword, where the median value may be the absolute CQI of the first codeword minus the offset. The value is set, so the differential CQI of the second codeword can be as shown in the following equation. When calculating the absolute CQI of the second codeword, the same absolute CQI can be calculated based on the absolute CQI of the first codeword. Level configuration, which is the absolute CQI level configuration of the first codeword.

The difference CQI of the second codeword = the absolute CQI-offset value of the first codeword - the absolute CQI of the second codeword

For example, the absolute CQI level of the first codeword is configured as Table 1, the absolute CQI of the first codeword calculated by the first codeword reference table 1 is 10, and the second codeword is also calculated based on the second codeword of Table 1. The absolute CQI is 10, the offset value of the network device configuration is 5, then the differential CQI of the second codeword = the offset value + the absolute CQI of the first codeword - the absolute CQI of the second codeword = 5 + 10-10 =5.

The terminal may calculate and report the absolute CQI of the first codeword based on the absolute CQI level configuration of the first codeword. For the second codeword, the differential CQI of the second codeword may be the difference between the absolute CQI of the median value and the second codeword, wherein the median value may be the absolute CQI level configuration of the second codeword, the closest (including Equal to the CQI number of the spectral efficiency corresponding to the sum of the offset value and the absolute CQI of the first codeword in the absolute CQI level configuration of the first codeword, the absolute CQI of the second codeword may be based on the absolute of the second codeword CQI level configuration calculation.

For example, the absolute CQI level of the first codeword is configured as Table 1. The first codeword can refer to Table 1 to select the CQI sequence number as the absolute CQI of the first codeword and report it. The absolute CQI level of the second codeword is configured as Table 2, which may be the spectral efficiency corresponding to the sum of the absolute CQI of the offset value in Table 1 and the first codeword in Table 2 closest to (including equal) The CQI sequence number, that is, if the network device is configured with an offset value of 5, the absolute CQI of the first codeword calculated by the first codeword based on Table 1 is 10, and the sum of the offset value and the absolute CQI of the first codeword is 10 +5=15 The corresponding spectral efficiency in Table 1 is 5.5547, then the median value can be the CQI number 12 corresponding to the spectral efficiency of the closest (or equal) spectral efficiency of 5.5547 in Table 2; the second code word The absolute CQI can be calculated based on Table 2, and the differential CQI of the second codeword can be the difference between the absolute CQI of the median and the second codeword, ie, the difference CQI of the second codeword = the median value - the absolute CQI of the second codeword =12-10=-2.

For example, the absolute CQI level of the first codeword is configured as Table 1. The first codeword can refer to Table 1 to select the CQI sequence number as the absolute CQI of the first codeword and report it. The absolute CQI level of the second codeword is configured as Table 3. The median value may be the spectral efficiency corresponding to the sum of the absolute CQI of the offset value in Table 1 and the first codeword in Table 3 closest to (including equal) The CQI sequence number, that is, if the network device is configured with an offset value of 5, the absolute CQI of the first codeword calculated by the first codeword based on Table 1 is 10, and the sum of the offset value and the absolute CQI of the first codeword is 10 +5=15 The corresponding spectral efficiency in Table 1 is 5.5547, then the median value can be the CQI number 8 corresponding to the spectral efficiency closest to the spectral efficiency of 5.5547 in Table 3; the absolute CQI of the second codeword can be based on Table 3 calculates 8, the differential CQI of the second codeword may be the difference between the absolute CQI of the median and the second codeword, that is, the difference CQI of the second codeword = the median value - the absolute CQI of the second codeword = 8-8 =0.

Optionally, for the second codeword, the differential CQI of the second codeword may be a difference between an absolute CQI of the median value and the second codeword, where the median value may be an absolute CQI level configuration of the second codeword, The closest to (including equal to) the CQI sequence number of the spectral efficiency corresponding to the difference between the offset value and the absolute CQI of the first codeword in the absolute CQI level configuration of the first codeword, the absolute CQI of the second codeword may be based on the second The absolute CQI level configuration calculation of the codeword.

For example, the absolute CQI level of the first codeword is configured as Table 1. The first codeword can refer to Table 1 to select the CQI sequence number as the absolute CQI of the first codeword and report it. The absolute CQI level of the second codeword is configured as Table 2. The median value may be the spectral efficiency corresponding to the difference between the offset value of the offset value in Table 1 and the absolute CQI of the first codeword in Table 2 (closely). The CQI sequence number, that is, if the network device configuration offset value is 5, the absolute CQI of the first codeword calculated by the first codeword based on Table 1 is 10, and the difference between the offset value and the absolute CQI of the first codeword is 10 -5=5 The corresponding spectral efficiency in Table 1 is 0.8770, then the median value can be Table 2 The CQI number 3 corresponding to the spectral efficiency closest to (or equal to) the spectral efficiency of 0.8770; the absolute CQI of the second codeword can be calculated based on Table 2, and the differential CQI of the second codeword can be the median and the second The difference between the absolute CQIs of the codewords, ie the difference CQI of the second codeword = the median value - the absolute CQI of the second codeword = 3-10 = -7.

It can be understood that, in the first embodiment, the differential CQI of the second codeword calculated by the embodiment of the present application is not the differential CQI actually reported by the terminal. In practice, after calculating the differential CQI, the terminal may further query the CQI sequence number corresponding to the calculated differential CQI from the differential CQI level definition, and report the queried CQI sequence number to the network device as a differential CQI, where the difference is The CQI level definition can be system default or network device configuration.

Specifically, if the network device sends configuration information to the terminal that does not include a differential CQI level configuration, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the system default differential CQI level definition, and use the queried CQI sequence number as a difference. The CQI is reported to the network device. If the network device sends the configuration information to the terminal, including the differential CQI level configuration, the terminal may determine the differential CQI level definition from the differential CQI level configuration configured by the network device, and query the CQI sequence number corresponding to the calculated differential CQI, and query the The CQI sequence number is reported to the network device as a differential CQI.

For another example, if the network device sends the configuration information to the terminal including the differential CQI level configuration, and the configured differential CQI level is defined as Table 5, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the table 5 of the network device configuration. And the queried CQI sequence number is reported to the network device as a differential CQI. That is, if the difference CQI of the second codeword calculated above is 0, the terminal may query the calculated CQI sequence number 0 corresponding to the differential CQI from Table 5, and use the queried CQI sequence number 0 as the second codeword. The differential CQI is reported to the network device.

It can be understood that, in the first embodiment, in the embodiment of the present application, the configuration information may be used to configure the terminal to report the subframe used by the differential CQI, so that the terminal reports the differential CQI through the configured subframe. No longer.

It can be seen that, when calculating the differential CQI, the present application is calculated based on the absolute CQI of the median and the second codeword, wherein the median value and the absolute CQI of the second codeword are based on the offset value of the network device configuration and the first The absolute CQI level configuration of one codeword or the absolute CQI level configuration of the second codeword is determined instead of being based directly on the absolute CQI of the first codeword and the absolute CQI of the second codeword, which can be when the downlink is When the static link, that is, the absolute CQI of the codewords is different, the network configuration is configured to better adapt the CQI reporting to the channel environment corresponding to the current two codewords, thereby allowing the network device to adjust the downlink more accurately. Modulation and coding to achieve better system performance.

Embodiment 3:

2C is a schematic flowchart of another differential CQI reporting method provided by the present application. As shown in FIG. 2C, the method may include:

S201e: The network device sends configuration information to the terminal, where the terminal receives configuration information sent by the network device, where the configuration information may include an absolute CQI level configuration of the first codeword and an absolute CQI level configuration of the second codeword.

S202f: The terminal reports a differential CQI of the second codeword, where the differential CQI of the second codeword is determined based on a median value and an absolute CQI of the second codeword.

In this embodiment, the absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword may be used to calculate an absolute CQI of the first codeword and an absolute CQI reference of the second codeword, respectively, and select a CQI sequence number. Definition table.

The terminal may calculate and report the absolute CQI of the first codeword based on the absolute CQI level configuration of the first codeword. For the second codeword, the differential CQI of the second codeword may be the difference between the absolute CQI of the median value and the second codeword, wherein the median value may be the absolute CQI level configuration of the second codeword, the closest (including Equal to the CQI sequence number of the spectral efficiency corresponding to the absolute CQI of the first codeword in the absolute CQI level configuration of the first codeword, the absolute CQI of the second codeword may be calculated based on the absolute CQI level configuration of the second codeword.

It should be noted that, in the embodiment of the present application, the absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword are different.

For example, the absolute CQI level of the first codeword is configured as Table 1. The first codeword can refer to Table 1 to select the CQI sequence number as the absolute CQI of the first codeword and report it. The absolute CQI level of the second codeword is configured as Table 2. The median value may be the CQI sequence number in Table 2 that is closest to (including equal) the spectral efficiency corresponding to the absolute CQI of the first codeword in Table 1, ie, The first codeword is based on the absolute CQI of the first codeword calculated in Table 1. The absolute CQI of the first codeword corresponds to a spectral efficiency of 2.7305 in Table 1, and the median value can be in Table 2, and the spectrum The efficiency 2.7305 is the closest (or equal) spectral efficiency corresponding to the CQI sequence number 7; the absolute CQI of the second codeword can be calculated based on Table 2, and the differential CQI of the second codeword can be the absolute value of the median and the second codeword. The difference between the CQIs, that is, the difference CQI of the second codeword = the median value - the absolute CQI of the second codeword = 7-10 = -3.

For example, the absolute CQI level of the first codeword is configured as Table 1. The first codeword can refer to Table 1 to select the CQI sequence number as the absolute CQI of the first codeword and report it. The absolute CQI level of the second codeword is configured as Table 3. The median value may be the spectral efficiency corresponding to the sum of the absolute CQI of the offset value in Table 1 and the first codeword in Table 3 closest to (including equal) CQI sequence number, that is, if the absolute CQI of the first codeword calculated by the first codeword based on Table 1 is 10, and the absolute CQI of the first codeword corresponds to a spectral efficiency of 2.7305 in Table 1, the median value may be In Table 3, the CQI number 5 corresponding to the spectral efficiency closest to the spectral efficiency of 2.7305; the absolute CQI of the second codeword can be calculated based on Table 3, and the differential CQI of the second codeword can be the median and the second codeword. The difference between the absolute CQIs, that is, the difference CQI of the second codeword = the median value - the absolute CQI of the second codeword = 5-8 = -3.

It can be understood that, in the first embodiment, the differential CQI of the second codeword calculated by the embodiment of the present application is not the differential CQI actually reported by the terminal. In practice, after calculating the differential CQI, the terminal may further query the CQI sequence number corresponding to the calculated differential CQI from the differential CQI level configuration, and report the queried CQI sequence number to the network device as a differential CQI, where the difference is The CQI level configuration can be system default or network device configuration.

Specifically, if the network device sends configuration information to the terminal that does not include a differential CQI level configuration, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the system default differential CQI level configuration, and use the queried CQI sequence number as a difference. The CQI is reported to the network device. If the network device sends the configuration information to the terminal, including the differential CQI level configuration, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the differential CQI level configuration configured by the network device, and report the queried CQI sequence number to the differential CQI. Network equipment.

For example, the system default differential CQI level configuration can be as shown in Table 4. If the network device sends configuration information to the terminal does not include a differential CQI level configuration, the terminal can query the calculated CQI sequence number corresponding to the differential CQI from Table 4, and The queried CQI sequence number is reported to the network device as a differential CQI. That is, if the difference CQI of the second codeword calculated above is -3, the terminal may query the calculated CQI sequence number 5 corresponding to the differential CQI from Table 4, and use the queried CQI sequence number 5 as the second codeword. The differential CQI is reported to the network device.

For another example, if the network device sends the configuration information to the terminal, including the differential CQI level configuration, and the configured differential CQI level is configured as Table 5, the terminal may query the calculated CQI sequence number corresponding to the differential CQI from the table 5 of the network device configuration. And the queried CQI sequence number is reported to the network device as a differential CQI. That is, if the difference CQI of the second codeword calculated above is -3, the terminal may query the calculated CQI sequence number 6 corresponding to the differential CQI from Table 5, and use the queried CQI sequence number 6 as the second codeword. The differential CQI is reported to the network device.

It can be seen that, when calculating the differential CQI, the present application is calculated based on the absolute CQI of the median and the second codeword, wherein the median value and the absolute CQI of the second codeword are based on the first codeword of the network device configuration. The absolute CQI level configuration and the absolute CQI level configuration of the second codeword are determined, instead of being directly calculated based on the absolute CQI of the first codeword and the absolute CQI of the second codeword, when the downlink is a static link, When the absolute CQI of the codewords is different, the CQI reporting is better adapted to the channel environment corresponding to the current two codewords by using the network configuration, so that the network device can more accurately adjust the downlink modulation and coding. Ways to achieve better system performance.

Embodiment 4:

It can be seen from the first embodiment that if only the differential CQI of the second codeword is calculated, as shown in FIG. 2D, a flow diagram of the differential CQI reporting method can perform the following steps:

S201g: The network device sends configuration information to the terminal, where the terminal receives configuration information sent by the network device, where the configuration information may include a median configuration and an absolute CQI level configuration of the second codeword.

S202h: The terminal reports a differential CQI of the second codeword, where the differential CQI of the second codeword is determined based on a median value and an absolute CQI of the second codeword.

The absolute CQI level configuration of the second codeword may be an absolute CQI reference for calculating the second codeword and a definition table for the CQI sequence number.

As with the first embodiment, the absolute CQI of the second codeword can be calculated based on the absolute CQI level configuration of the second codeword. The differential CQI of the second codeword may be the difference between the median configuration and the absolute CQI of the second codeword. For details, refer to the related description of the first embodiment, and details are not described herein again.

When the downlink is a static link, that is, the absolute CQI of the codewords is different, the downlink Cs can be a static link, that is, when the absolute CQI of the codewords is different. The network configuration enables the CQI reporting to better adapt to the channel environment corresponding to the current two codewords, thereby allowing the network device to more accurately adjust the downlink modulation and coding modes to achieve better system performance.

It should be noted that the above table 1, table 2, and table 3 absolute CQI definition tables can be used as the absolute CQI calculated by the first codeword and the second codeword, and the definition table of the CQI sequence number is selected, but in the above different embodiments. According to the system configuration, Table 1 can be used as the first codeword to calculate the CQI and select the definition table of the CQI sequence number, that is, the absolute CQI level configuration of the first codeword; or, when the table 2 is used as the first codeword, the CQI is used as a reference. And the definition table of the CQI serial number is selected, that is, the absolute CQI level configuration of the first codeword; or, when the CQI is calculated by using Table 3 as the second codeword, the definition table of the CQI serial number is selected, that is, the absolute CQI level of the second codeword. Configuration, etc. It can also be understood that the absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword in the embodiment of the present application may also be other than Table 1, Table 2, and Table 3 above. The absolute CQI definition form is not limited here. It can also be understood that the exemplary disclosed Table 4, Table 5, and Table 6 differential CQI definition tables, the differential CQI definition table may also be other differential CQI definition tables other than Table 4, Table 5, and Table 6 above. This is not limited here.

In addition, the embodiment of the present application is mainly for the terminal to report the absolute CQI of the first codeword and the differential CQI of the second codeword. It can be understood by those skilled in the art that the terminal can also report the absolute CQI and the second codeword. a differential CQI of a codeword, wherein the absolute CQI of the second codeword and the differential CQI of the first codeword may refer to a related description of the absolute CQI of the first codeword and the differential CQI of the second codeword in the embodiment of the present application, It also belongs to the scope protected by this application, and details are not described herein again.

Based on the same technical concept of the foregoing method embodiments, the embodiment of the present application further provides a terminal, which can be applied to the foregoing method embodiments.

FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure, which may include:

a sending unit 401, configured to report a differential channel quality indicator CQI, where the differential CQI is determined based on a median value and an absolute CQI of the second codeword;

Absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.

Optionally, when the network configuration includes an absolute CQI level configuration of the second codeword, the absolute CQI level configuration of the second codeword is different from the absolute CQI level configuration of the first codeword, and the median and the second codeword absolute CQI The calculation is based on the absolute CQI level configuration of the second codeword.

Optionally, when the network configuration does not include the median configuration and the offset value, the calculation of the median is based on an absolute CQI of the first codeword, wherein the absolute CQI of the first codeword is based on an absolute CQI level of the first codeword. The configuration is ok.

Optionally, when the network configuration includes an absolute CQI level configuration of the second codeword, and the network configuration does not include the median configuration and the offset value, the median value is the absolute CQI level configuration of the second codeword, which is closest to the first The CQI sequence number of the spectral efficiency corresponding to the absolute CQI of the first codeword in the absolute CQI level configuration of the codeword.

Optionally, when the network configuration includes a median configuration, the median uses a median configured value.

Optionally, when the network configuration includes the offset value, the calculation of the median value is based on a sum or difference between the absolute CQI of the first codeword and the offset value, wherein the absolute CQI of the first codeword is based on the absolute of the first codeword. CQI level configuration is determined.

Optionally, when the network configuration includes an absolute CQI level configuration of the second codeword, and the network configuration includes the offset value, the median value is an absolute CQI of the absolute CQI level configuration of the second codeword, which is closest to the first codeword. The CQI sequence number of the spectral efficiency corresponding to the sum or difference of the offset value and the absolute CQI of the first codeword in the level configuration.

Optionally, when the network configuration does not include the absolute CQI level configuration of the second codeword, and the network configuration includes the offset value, the median is the sum or difference of the absolute CQI and the offset value of the first codeword.

Optionally, when the network configuration includes a differential CQI level configuration, the difference CQI is the difference between the median value and the second codeword absolute CQI, and is obtained based on the differential CQI level configuration.

Optionally, the sending unit 401 is specifically configured to report the differential CQI by using a subframe configured by the network device.

Optionally, the configuration information may be semi-statically configured by using a radio resource control message.

For the embodiments of the present application, reference may be made to the related descriptions of the first embodiment to the fourth embodiment, and details are not described herein again.

When the downlink is a static link, that is, when the absolute CQI of the codeword is different, the network configuration is used to make the CQI report better adapted to the current two codewords. The channel environment allows the network device to more accurately adjust the downstream modulation and coding modes to achieve better system performance.

Based on the same technical concept of the foregoing method embodiments, the embodiment of the present application further provides a network device, which can be applied to the foregoing method embodiments.

As shown in FIG. 5, a schematic structural diagram of a network device according to an embodiment of the present disclosure may include:

The sending unit 501 is configured to send configuration information, where the configuration information includes one or more of the following three items in an absolute CQI level configuration of the first codeword:

Absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.

Optionally, the absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword are different.

Optionally, the configuration information is used to configure a subframe used by the terminal to report the differential CQI, where the differential CQI is determined based on the configuration information.

FIG. 6 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure, where the terminal includes a processor 601, a memory 602, and a communication module 603.

The memory 602 includes, but is not limited to, a random access memory (English: random access memory, abbreviated as: RAM), a read-only memory (English: read-only memory, abbreviated as: ROM) or an erasable programmable read-only memory (English: Erasable programmable read-only memory (abbreviation: EPROM), the memory 602 is used to store related program codes and related data.

The processor 601 may be one or more central processing units (English: central processing unit, CPU for short). In the case that the processor 601 is a CPU, the CPU may be a single core CPU or a multi-core CPU.

In a possible implementation, the processor 601 in the terminal reads the program code stored in the memory 602 to perform the following operations:

The differential channel quality indicator CQI is reported by the communication module 603, and the differential CQI is determined based on the absolute CQI of the median and the second codeword;

Absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.

Further, the communication module 603 can also report the differential CQI through the subframe configured by the network device.

The configuration information may be semi-statically configured by the RRC message.

FIG. 7 is a schematic structural diagram of still another network device according to an embodiment of the present application. The network device includes a processor 701, a memory 702, and a communication module 703.

Memory 702 includes, but is not limited to, a RAM, ROM or EPROM for storing associated program code and associated data.

The processor 701 may be one or more CPUs. In the case where the processor 701 is a CPU, the CPU may be a single core CPU or a multi-core CPU.

In a first possible implementation, the processor 701 in the control device reads the program code stored in the memory 702 to perform the following operations:

The configuration information is sent by the communication module 703, and the configuration information includes one or more of the following three items in the absolute CQI level configuration of the first codeword:

Absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.

Alternatively, the absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword may be different.

The configuration information is used to configure a subframe used by the terminal to report the differential CQI, wherein the differential CQI is determined based on the configuration information.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above software function parts can be stored in the storage unit. The storage unit includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform some of the steps of the methods described in various embodiments of the present application. The storage unit includes: one or more memories, such as a read-only memory (ROM), a random access memory (RAM), and an electrically erasable programmable read only memory (EEPROM). and many more. The storage unit may exist independently or may be integrated with the processor.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

It will be understood by those skilled in the art that the various numbers of the first, second, etc., which are referred to herein, are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application.

It will be understood by those skilled in the art that in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, without The implementation process of the embodiments of the present application should be constituting any limitation.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium. (such as Solid State DisB (SSD)).

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should 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 substitutions do not deviate from the technical solutions of the embodiments of the present application. range.

Claims

A channel quality indication reporting method, comprising:

Transmitting, by the terminal, a differential channel quality indicator CQI, where the differential CQI is determined based on a median value and an absolute CQI of the second codeword;

The median value and the absolute CQI of the second codeword are calculated based on a network device configuration, where the network configuration includes an absolute CQI level configuration of the first codeword and one of the following three items or Multiple:

An absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.
The method of claim 1, wherein when the network configuration includes an absolute CQI level configuration of the second codeword, an absolute CQI level configuration of the second codeword and the first codeword The absolute CQI level configuration is different, and the calculation of the median and the second codeword absolute CQI is based on the absolute CQI level configuration of the second codeword.
The method according to claim 1, wherein when said network configuration does not include said median configuration and said offset value, said median value is calculated based on an absolute CQI of said first codeword, wherein The absolute CQI of the first codeword is determined based on an absolute CQI level configuration of the first codeword.
The method according to claims 2 and 3, wherein when said network configuration includes an absolute CQI level configuration of said second codeword, and said network configuration does not include said median configuration and offset values And the median value is a CQI sequence number of a spectral efficiency corresponding to an absolute CQI of the first codeword in an absolute CQI level configuration of the first codeword in an absolute CQI level configuration of the second codeword. .
The method of claim 1 wherein said median value is a value of said median configuration when said network configuration includes said median configuration.
The method according to claim 1, wherein when said network configuration includes said offset value, said median value is calculated based on a sum of said first codeword absolute CQI and said offset value Poor, wherein the absolute CQI of the first codeword is determined based on an absolute CQI level configuration of the first codeword.
The method according to claims 2 and 6, wherein when the network configuration includes an absolute CQI level configuration of the second codeword and the network configuration includes the offset value, the median value And corresponding to a sum or difference between the offset value of the absolute CQI level configuration of the first codeword and the absolute CQI of the first codeword in an absolute CQI level configuration of the second codeword. CQI sequence number for spectral efficiency.
The method according to claim 6, wherein when the network configuration does not include an absolute CQI level configuration of the second codeword, and the network configuration includes the offset value, the median value Absolute for the first codeword The sum or difference between the CQI and the offset value.
The method according to any one of claims 1 to 8, wherein when the network configuration comprises a differential CQI level configuration, the differential CQI is a difference between the median value and the second codeword absolute CQI, Obtained on the basis of the differential CQI level configuration.
The method according to any one of claims 1 to 9, wherein the terminal reports a differential channel quality indicator CQI, including:

The terminal reports the differential CQI through a subframe configured by the network device.
The method according to any one of claims 1 to 10, wherein the configuration information is semi-statically configured by a radio resource control message.
A channel quality indication reporting method, comprising:

The network device sends configuration information, the configuration information including one or more of the following three items in an absolute CQI level configuration of the first codeword:

An absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.
The method of claim 12 wherein the absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword are different.
The method according to claim 12 or 13, wherein the configuration information is used to configure a subframe used by the terminal to report the differential CQI, wherein the differential CQI is determined based on the configuration information.
A terminal, wherein the terminal comprises:

a sending unit, configured to report a differential channel quality indicator CQI, where the differential CQI is determined based on a median value and an absolute CQI of the second codeword;

The median value and the absolute CQI of the second codeword are calculated based on a network device configuration, where the network configuration includes an absolute CQI level configuration of the first codeword and one of the following three items or Multiple:

An absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.
The terminal according to claim 15, wherein when the network configuration includes an absolute CQI level configuration of the second codeword, an absolute CQI level configuration of the second codeword and the first codeword The absolute CQI level configuration is different, and the calculation of the median and the second codeword absolute CQI is based on the absolute CQI level configuration of the second codeword.
The terminal according to claim 15, wherein when the network configuration does not include the median configuration and the offset value, the calculation of the median value is based on an absolute CQI of the first codeword, wherein The absolute CQI of the first codeword is determined based on an absolute CQI level configuration of the first codeword.
The terminal according to claims 16 and 17, wherein when said network configuration includes an absolute CQI level configuration of said second codeword, and said network configuration does not include said median configuration and offset values And the median value is a CQI sequence number of a spectral efficiency corresponding to an absolute CQI of the first codeword in an absolute CQI level configuration of the first codeword in an absolute CQI level configuration of the second codeword. .
The terminal according to claim 15, wherein when the network configuration includes the median configuration, the median value is a value of the median configuration.
The terminal according to claim 15, wherein when said network configuration includes said offset value, said median value is calculated based on a sum of said first codeword absolute CQI and said offset value Poor, wherein the absolute CQI of the first codeword is determined based on an absolute CQI level configuration of the first codeword.
The terminal according to claims 16 and 20, wherein when said network configuration includes an absolute CQI level configuration of said second codeword, and said network configuration includes said offset value, said median value And corresponding to a sum or difference between the offset value of the absolute CQI level configuration of the first codeword and the absolute CQI of the first codeword in an absolute CQI level configuration of the second codeword. CQI sequence number for spectral efficiency.
The terminal according to claim 20, wherein when the network configuration does not include an absolute CQI level configuration of the second codeword, and the network configuration includes the offset value, the median value Is the sum or difference of the absolute CQI of the first codeword and the offset value.
The terminal according to any one of claims 15 to 22, wherein when the network configuration comprises a differential CQI level configuration, the differential CQI is a difference between the median value and the second codeword absolute CQI. Obtained on the basis of the differential CQI level configuration.
A terminal according to any one of claims 15 to 23, characterized in that

The sending unit is configured to report the differential CQI by using a subframe configured by the network device.
The terminal according to any one of claims 15 to 24, wherein the configuration information is semi-statically configured by a radio resource control message.
A network device, where the network device includes:

a sending unit, configured to send configuration information, where the configuration information includes an absolute CQI level configuration of the first codeword One or more of the three:

An absolute CQI level configuration of the second codeword;

Median configuration or offset value;

Differential CQI level configuration.
The network device of claim 26, wherein the absolute CQI level configuration of the first codeword and the absolute CQI level configuration of the second codeword are different.
The terminal according to claim 26 or 27, wherein the configuration information is used to configure a subframe used by the terminal to report the differential CQI, wherein the differential CQI is determined based on the configuration information.