WO2019141232A1

WO2019141232A1 - Communication and mcs receiving and notification method and device

Info

Publication number: WO2019141232A1
Application number: PCT/CN2019/072310
Authority: WO
Inventors: 邵家枫; 官磊; 吕永霞; 胡丹; 宋兴华
Original assignee: 华为技术有限公司
Priority date: 2018-01-19
Filing date: 2019-01-18
Publication date: 2019-07-25

Abstract

A communication and MCS receiving and notification method and device, for providing an MCS corresponding to a lower encoding rate, so as to better adapt requirements of a URLLC service. The communication method comprises: determining N MCS indexes in an MCS form, wherein the value of an encoding rate corresponding to an MCS index X of the N MCS indexes multiplied by 1024 is smaller than or equal to a first threshold, where X is an integer greater than or equal to 0, N is a positive integer, and N is greater than or equal to X; and sending at least one MCS index of the N MCS indexes.

Description

Communication, MCS receiving, notification method and device

This application claims the priority of the Chinese patent application filed on January 19, 2018, the Chinese Patent Office, the application number is 201810055745.6, and the application name is "a communication, MCS reception, notification method and equipment", which is required in 2018. Submitted on the 4th of the month to the China Patent Office, application number 201810302135.1, the priority of the Chinese patent application titled "A Communication, MCS Receiving, Notification Method and Equipment", and the requirement to submit the Chinese patent on May 10, 2018. The priority of the Chinese Patent Application No. 201810467480.0, the entire disclosure of which is hereby incorporated by reference in its entirety in the entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all all

Technical field

The present application relates to the field of communications technologies, and in particular, to a communication, MCS receiving, notification method, and device.

Background technique

The international telecommunication union (ITU) defines three types of application scenarios for the fifth generation mobile communication system (the fifth generation, 5G) and future mobile communication systems: enhanced mobile broadband (eMBB), Ultra reliable and low latency communications (URLLC) and massive machine type communications (mMTC).

Among them, the URLLC service requires extremely high latency, and the one-way transmission delay from the sender to the receiver is required to be within 0.5 milliseconds (millisecond, ms), and the transmission reliability is 99.999% within 1 ms.

The block error rate (BLER) corresponding to the modulation coding scheme (MCS) applied by the current eMBB service is 10e-1, which is higher reliability for the URLLC service with time delay. The system needs to support a lower BLER. Given the same signal-to-noise ratio, a lower BLER can be achieved if the encoding rate is lower.

However, the coding rate of the MCS included in the currently applied MCS table is high, and the requirements of the URLLC service cannot be adapted.

Summary of the invention

The embodiment of the present application provides a communication, MCS receiving, and notification method, and a device for providing an MCS corresponding to a lower coding rate to better adapt the requirements of the URLLC service.

In a first aspect, a communication method is provided, which can be performed by a communication device, such as a network device, such as a base station. The method includes: determining N MCS indexes in an MCS table, the coding rate corresponding to the MCS index X in the N MCS indexes multiplied by a value of 1024 is less than or equal to a first threshold, where X is an integer greater than or equal to 0 , N is a positive integer, N is greater than or equal to X; and at least one MCS index of the N MCS indexes is sent.

Accordingly, in a second aspect, a communication method is provided, which can be performed by a communication device, such as a terminal device. The method includes: receiving downlink control information, and acquiring, according to the downlink control information, at least one MCS index in an MCS table, where the MCS table includes N MCS indexes, and a coding rate corresponding to an MCS index X in the N MCS indexes The value multiplied by 1024 is less than or equal to the first threshold, where X is an integer greater than or equal to 0, N is a positive integer, and N is greater than or equal to X.

In the embodiment of the present application, the coding rate corresponding to the index value X of the N index values included in the MCS table is multiplied by 1024 to be less than or equal to the first threshold, that is, the MCS table provided in the embodiment of the present application includes a lower The MCS table of the coding rate can be adapted to the lower BLER. The MCS table provided by the embodiment of the present application can effectively adapt the requirements of the URLLC service. The first threshold may be specified by a protocol, for example, the first threshold is 119, or 120, etc., and is not specifically limited.

In one possible design, the encoding rate corresponding to the MCS index X multiplied by a value of 1024 is greater than or equal to the second threshold.

The value of the coding rate corresponding to the MCS index X multiplied by 1024 cannot be infinitely small, so the value of the coding rate corresponding to the MCS index X multiplied by 1024 may also be greater than or equal to the second threshold. The second threshold may be specified by a protocol, for example, the first threshold is 5, or 8, etc., and is not limited in specific terms.

In a possible design, the modulation mode corresponding to the MCS index X is the same as the modulation mode corresponding to the MCS index X+1, and the coding rate corresponding to the MCS index X and the coding rate corresponding to the MCS index X+1 are The difference between the *1024 is less than or equal to the third threshold; and/or, the modulation mode corresponding to the MCS index X is the same as the modulation mode corresponding to the MCS index X+1, the coding rate corresponding to the MCS index X and the The difference *1024 between the encoding rates corresponding to the MCS index X+1 is greater than or equal to the fourth threshold.

According to the calculation of the existing protocol, the fluctuation of the coding rate causes the resource allocation to change greatly. Therefore, if the terminal device can accurately report the coding rate or the spectral efficiency value corresponding to the SNR, the system can save a lot of resources and improve system utilization. . According to the evaluation, in particular, when the time domain resource for transmitting data is 2 symbols and the encoding rate *1024 is 30, at least the required frequency domain resource is 212 Resource Block (RB), and the encoding rate *1024 is 34. The required frequency domain resource is 192 RB, the frequency domain resource required for the coding rate *1024 is 37 is 172 RB, and the frequency domain resource required for the coding rate *1024 is 42 is 152 RB. Therefore, in the CQI table or the MCS table of the URLLC, different from the original table, if the distance between two adjacent points can reach less than or equal to the third threshold, the use efficiency of the system resources can be improved. Therefore, in the MCS table provided by the embodiment of the present application, the modulation mode corresponding to the MCS index X and the MCS index X+1 is the same, and the difference between the coding rate corresponding to the MCS index X and the coding rate corresponding to the MCS index X+1 is *1024. It may be less than or equal to the third threshold.

In addition to the condition regarding the third threshold, in the embodiment of the present application, the modulation mode corresponding to the MCS index X is the same as the modulation mode corresponding to the MCS index X+1, and the coding rate corresponding to the MCS index X corresponds to the MCS index X+1. The difference between the encoding rates *1024 can also be greater than or equal to the fourth threshold. The value of the fourth threshold is related to the channel estimation accuracy of the terminal device. If the SNR corresponding to 10 is 0.5 dB, the channel estimation accuracy of the terminal device is also 0.5 dB, that is, the coding rate difference is lower than this. The value is incapable of being recognized by the terminal device. Therefore, in the MCS table provided in the embodiment of the present application, the difference between the coding rates of the two adjacent items *1024 is greater than or equal to the fourth threshold.

In a possible design, the coding rate of the MCS index X is determined according to the coding rate of the MCS index X-1 and the coding rate of the MCS index X+2, and/or the coding rate of the MCS index X+1 is It is determined according to the coding rate of the MCS index X-1 and the coding rate of the MCS index X+2.

The embodiment of the present application may add a new item to the original CQI form or the MCS form to obtain a new MCS form. Then one way to add a new item is to halve between the two items of the original CQI form or the MCS form to get two new items. In this way, the MCS table provided by the embodiment of the present application can be obtained, so that a low coding rate item can be added in the new MCS table, because the URLLC is a highly reliable service, and a low coding rate point is needed, so the design is so The MCS form can improve the reliability of URLLC transmission.

In one possible design, the encoding rate of the MCS index X is equal to one of the following:

In one possible design, the encoding rate of the MCS index X+1 is equal to one of the following:

The calculation method for the MCS index X and the MCS index X+1 as above is only an example, and the embodiment of the present application is not limited thereto.

In one possible design, the first threshold is 119, and the value of the encoding rate corresponding to the MCS index X multiplied by 1024 includes at least one of the following values:

5,8,10,13,14,15,16,17,18,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36, 37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61, 62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, and 119.

List some possible values, which can be selected according to the situation in the specific MCS table, which is more flexible.

In a possible design, the coding mode corresponding to the MCS index X is BPSK or QPSK.

Generally, the larger the value of the MCS index is, the larger the corresponding coding rate is. The coding rate corresponding to the MCS index X is smaller, so the value of the MCS index X is smaller. For example, the MCS index X includes the MCS index 1. Or include MCS index 0, etc. When the value of the MCS index is small, the corresponding coding mode can use BPSK or QPSK to obtain better coding performance.

In a possible design, in the MCS table, the coding mode corresponding to the MCS index with the coding rate less than F is Polar or LDPC BG2, and F is greater than or equal to 0.25.

The MCS index with a small coding rate may correspond to a coding mode such as a Polar or an LDPC BG2, and the specific embodiment of the present application is not limited.

In one possible design, the MCS index in the MCS table corresponds to at least two of the following encoding modes: LDPC BG1, LDPC BG2, and Polar.

In addition to the three types listed above, the MCS index in the MCS table may also correspond to other coding modes, which is not limited in the embodiment of the present application.

In a possible design, the modulation manners of the MCS index XX and the MCS index XX+1 are different in the N MCS indexes, and the spectrum efficiency of the MCS index XX and the MCS index XX+1 is the same. The coding mode corresponding to the MCS index XX is BG2, and the coding mode corresponding to the MCS index XX+1 is BG1, or the coding mode corresponding to the MCS index XX is BG1, and the coding mode corresponding to the MCS index XX+1 Is BG2, wherein the XX is an integer greater than or equal to 0, and the XX+1 is less than or equal to N.

The newly introduced MCS in the MCS table provided by the embodiment of the present application can be considered as first introducing a new item in the CQI table, and the new item introduced in the CQI table can be directly added to the MCS table, then in the MCS table. In the newly added item, the two items can be averaged, for example, the arithmetic mean value, and in this way, a new item can be obtained. The two items here are the two adjacent to the MCS index. Then, when the two items are averaged, they may get only one item, or they may get two items. For example, by averaging the two items, two items are obtained. The MCS indexes of the two items are the MCS index XX and the MCS index XX+1, respectively, and the modulation modes corresponding to the MCS index XX and the MCS index XX+1 are different. For example, the MCS index XX corresponds to QPSK, and the MCS index XX+1 corresponds to 16QAM, but the spectral efficiency corresponding to the MCS index XX and the MCS index XX+1 may be the same, in this case, the MCS index XX and the MCS index XX+ The corresponding coding mode may be different. For example, the MCS index XX corresponds to BG2, the MCS index XX+1 corresponds to Polar, or the MCS index XX+1 corresponds to BG2, and the MCS index XX corresponds to Polar.

In a possible design, in the N MCS indexes, the corresponding coding mode is that the number of MCS indexes of the BG2 is greater than or equal to the number of corresponding MCS indexes whose coding modes are Polar.

That is to say, in the MCS table, the number of MCS indexes corresponding to the higher coding rate is larger, which also enables the MCS table provided by the embodiment of the present application to be better compatible with the existing MCS table.

In one possible design, the MCS table includes a corresponding item of modulation mode of QPSK, and includes items corresponding to modulation modes of BSPK and 16QAM, and does not include items of corresponding modulation modes of 64QAM and 256QAM.

That is to say, the embodiment of the present application can limit the modulation mode, but does not limit the coding rate and the spectrum efficiency.

In a third aspect, a method of receiving an MCS is provided, which method can be performed by a communication device, such as a terminal device. The method includes: the communication device transmitting a first CQI number, the first CQI number being determined according to the first CQI table; the communication device receiving an MCS number in the first MCS table, the first MCS table including An item not included in the first CQI table, and a modulation mode in the first CQI table is at least one item of 64QAM.

Correspondingly, in a fourth aspect, a method for notifying an MCS is provided, which may be performed by a communication device, such as a network device, such as a base station. The method includes: a communication device receiving a first channel quality indicator CQI number in a first CQI table; the communication device transmitting a first MCS number, the first MCS number being determined according to a first MCS table, the first MCS The table includes an item not included in the first CQI table, and at least one item of the modulation method in the first CQI table is 64QAM.

An item that is not included in the first CQI table is, for example, a corresponding item with a lower coding rate. That is, the MCS table provided by the embodiment of the present application includes an MCS with a lower coding rate, and such an MCS table can correspond to The lower the BLER, the MCS table provided by the embodiment of the present application can effectively adapt the requirements of the URLLC service.

In one possible design, the first MCS table includes all items except the item having the smallest CQI number in the first CQI table.

The first MCS table includes all items except the item having the smallest CQI number in the first CQI table. The first MCS table includes all items except the item of the CQI number 0 corresponding to the first CQI table, that is, the first MCS table does not include all items except the items in the range of the first CQI table.

In one possible design, the total number of items in the first MCS table is 16, and the number of items not included in the first CQI table is 1.

For example, the coding rate of one item not included in the first CQI table is smaller than the coding rate of CQI number 1 in the first CQI table. As another example, the spectral efficiency of the 1 term not included in the first CQI table is less than the spectral efficiency of the CQI number 1 in the first CQI table. When the network device receives the CQI number 1 or the CQI number 0 sent by the terminal device, the network device can also schedule the terminal device at a lower coding rate, so that the terminal device can still meet the service requirements of the URLLC. Thereby ensuring the reliability of the URLLC service transmission.

In one possible design, the MCS number of the item not included in the first CQI table in the first MCS table is one of the following: MCS number 0, MCS number 1, and MCS number 3.

If the network device receives the CQI number 1 or the CQI number 0 sent by the terminal device, the network device can also schedule the terminal device at a lower coding rate, so that the terminal device can still meet the service requirements of the URLLC. Thereby ensuring the reliability of the URLLC service transmission. Alternatively, the network device receives the CQI number 1 or the CQI number 2 sent by the terminal device, and the network device can also schedule the terminal device according to the MCS number 1 with the medium spectrum efficiency, so that the terminal device can still meet the service requirement of the URLLC. Thereby ensuring system efficiency and reliability of URLLC service transmission. Alternatively, when the network device receives the CQI number 2 or the CQI number 3 sent by the terminal device, the network device may also schedule the terminal device corresponding to the medium spectrum efficiency MCS number 3, so that the terminal device can still meet the service requirements of the URLLC. Thereby ensuring system efficiency and reliability of URLLC service transmission.

In a possible design, the number of items included in the first MCS table is the same as the number of items included in the first CQI table, or the number of items included in the first MCS table is less than or equal to 16 and greater than The number of items included in the first CQI table.

In one possible design, among the number of items included in the first CQI table and/or the first MCS table, the value of the corresponding coding rate multiplied by 1024 includes the following value: 30, and further includes at least one of the following values : 35, 37, 40, 46, 49, 68, 70, 90, 95.

The relationship between the first MCS table and the first CQI table is described above, which is only an example, and the embodiment of the present application is not limited thereto.

In one possible design, the spectral efficiency of the item of MCS number 0 in the first MCS table is less than the spectral efficiency of the item of CQI number 1 in the first CQI table.

When the network device receives the CQI number 1 or the CQI number 0 sent by the terminal device, the network device can also schedule the terminal device at a lower coding rate, so that the terminal device can still meet the service requirements of the URLLC. Thereby ensuring the reliability of the URLLC service transmission.

In a possible design, all items in the first CQI table with a modulation mode of 64QAM are part of 64QAM in the second CQI table, and part of the 64QAM in the second CQI table includes:

The CQI numbers corresponding to the partial items are equally spaced; or,

The CQI number corresponding to the partial item is discontinuous, and at least one item other than the item having the largest CQI number corresponding to all the items in the second CQI table whose modulation mode is 64QAM; or

The CQI numbers corresponding to the partial items are consecutive, and at least one item other than the item having the largest CQI number corresponding to all the items in the second CQI table whose modulation mode is 64QAM; or

The partial item includes an item having the largest CQI number corresponding to all items in the second CQI table whose modulation mode is 64QAM; or

The partial item includes consecutive N items corresponding to the CQI number of the 64QAM in the second CQI table, and the first item of the consecutive N items is the corresponding modulation mode of the second CQI table is 64QAM. The smallest item of the CQI number, N is a positive integer greater than or equal to 1 and less than or equal to 5.

Several possibilities for some of the 64QAM entries in the second CQI table are introduced.

In a possible design,

The part of the second CQI table whose modulation mode is 64QAM is the CQI number 10, the CQI number 12, and the CQI number 14 in the second CQI table, or the CQI number 11, the CQI number 13, and the CQI number 15; or

The part of the second CQI table whose modulation mode is 64QAM is CQI number 10, CQI number 11, CQI number 12, CQI number 13 and CQI number 15 in the second CQI table, or CQI number 10, CQI number 11, CQI number 14 and CQI number 15, or CQI number 11, CQI number 12, CQI number 13, CQI number 14 and CQI number 15, or CQI number 10, CQI number 11, CQI number 12, CQI number 14 and CQI number 15; or,

The part of the second CQI table whose modulation mode is 64QAM is CQI number 10, CQI number 11, CQI number 12, CQI number 13 and CQI number 14 in the second CQI table, or CQI number 10, CQI number 11, CQI number 12 and CQI number 13, or CQI number 10, CQI number 11 and CQI number 12, or CQI number 10 and CQI number 11.

In a possible design, each item in the first MCS table corresponds to a modulation mode, a coding rate, and a spectral efficiency; or, the modulation method of the largest numbered item in the first MCS table For QPSK, the coding rate and the spectral efficiency are reserved; or, the modulation method of the highest numbered item in the first MCS table is 16QAM, the coding rate and the spectral efficiency are reserved, and the number in the first MCS table is The modulation mode of the item with a maximum of -1 is QPSK, and the coding rate and the spectrum efficiency are reserved; or, the modulation method of the item with the largest number in the first MCS table is 64QAM, the coding rate and the spectrum efficiency are reserved, and The modulation method of the item with the highest number -1 in the first MCS table is QPSK, and the coding rate and the spectral efficiency are reserved; or the modulation mode, coding rate, and spectral efficiency of at least one of the first MCS tables Is reserved.

In a possible design, the value range of the CQI number in the first CQI table is the same as the value range of the CQI number in the second CQI table.

For example, if the first CQI table includes CQI numbers 0 to 15, the CQI number in the second CQI table also includes 0-15.

In a possible design, the first MCS table is determined according to the first MCS offset value and the second MCS table, or the coding rate corresponding to the at least one MCS number in the first MCS table is according to the first The MCS offset value is determined by the second MCS table. The first MCS offset value may be sent by the network device by using high layer signaling or downlink control information DCI.

In one possible design, the first MCS table includes 32 items including all items in the first CQI table, the first CQI table including at least one spectral efficiency less than 78/1024* An item of 2, wherein the 32 items further include at least one of a spectral efficiency not included in the first CQI table greater than 772/1024*6; wherein

The modulation mode corresponding to an MCS number X, the MCS number X-1, and the MCS number X is QPSK, and the modulation mode corresponding to the MCS number X+1 is 16QAM, and the coding rate of the MCS number X is equal to one of the following: Entire {(the encoding rate of the MCS number X-1*2+ the encoding rate of the MCS number X+1*4)/4}, rounded down {(the encoding rate of the MCS number X-1* 2+ encoding rate of the MCS number X+1 *4) / 4}, rounded { (the encoding rate of the MCS number X-1 * 2 the encoding rate of the MCS number X + 1 * 4) / 4 }, (the encoding rate of the MCS number X-1 *2+ the encoding rate of the MCS number X+1 *4) / 4;

An MCS number Y, the modulation mode corresponding to the MCS number Y-1 and the MCS number Y is 16QAM, and the modulation mode corresponding to the MCS number Y+1 is 64QAM, and the coding rate of the MCS number Y is equal to the following one: Entire {(the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8}, rounded down { (the encoding rate of the MCS number Y-1 * 4+ The coding rate of the MCS number Y+1*6)/8}, rounded to {(the coding rate of the MCS number Y-1*4+the coding rate of the MCS number Y+1*6)/8 }, (the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8, where Y is greater than X + 2.

Currently, the URLLC supports CQI tables, which respectively correspond to different BLERs. For example, the two CQI tables are respectively referred to as a first CQI table and a second CQI table. Wherein, all or part of the two CQI tables are different. For example, the BLER corresponding to the first CQI table is 10e-5, and the first CQI table introduces more low spectral efficiency items, such as a second CQI table. The corresponding BLER is 10e-1, and the second CQI table can reuse the CQI table of the eMBB, which includes more high spectral efficiency items. At present, the MCS table is undetermined. If two MCS tables are also designed and corresponded to the CQI table one by one, then there is a problem of how the terminal device and the network device determine which MCS table should be used. There are two current mainstream solutions: 1. The dynamic MCS table is adopted, that is, the network device notifies the terminal device which MCS table is used by signaling; 2. The MCS table is semi-statically configured through RRC signaling. The first scheme introduces more additional signaling overhead, and the second scheme takes effect too slowly, which is not suitable for the scheduling of services with more delays such as URLLC. In view of this, in the embodiment of the present application, a new MCS table is provided. For example, the MCS table is referred to as a first MCS table, and the first MCS table may correspond to at least two different CQI tables of BLER.

In the embodiment of the present application, the first MCS table may include 32 items, where the 32 items include all items in the first CQI table, and the first CQI table includes at least one item whose spectral efficiency is less than 78/1024*2, currently It is known that the maximum spectral efficiency of the first CQI table is 772/1024*6, then all items included in the first CQI table should be included in the first MCS table, and the first of the 32 items also includes the first At least one item not included in the CQI table, the spectral efficiency of at least one item not included in the first CQI table is greater than 772/1024*6, that is, not included in the first CQI table and greater than 772/1024*6 The item of spectral efficiency, in which all or part of the item is included in the first MCS table.

In a possible design, the X, the Y, the item not included in the first CQI table and all the items in the first CQI table correspond to the value of the MCS number, and the second CQI table The spectral efficiency of the CQI number 14 in the medium is 873/1024*6, and the spectral efficiency of the CQI number 15 in the second CQI table is 948/1024*6, which is one of the following combinations:

X is 15, Y is 21, the spectral efficiency of the MCS number 30 is 873/1024*6, the spectral efficiency of the MCS number 31 is 948/1024*6, and the spectral efficiency of the MCS number 0 is the The spectral efficiency of the CQI number 1 in a CQI table, the spectral efficiency of the MCS number 2 being the spectral efficiency of the CQI number 2 in the first CQI table;

X is 15, Y is 21, the spectral efficiency of the MCS number 30 is 873/1024*6, the spectral efficiency of the MCS number 31 is 910/1024*6, and the spectral efficiency of the MCS number 0 is The spectral efficiency of the CQI number 1 in a CQI table, the spectral efficiency of the MCS number 2 being the spectral efficiency of the CQI number 2 in the first CQI table;

X is 13, Y is 19, the spectral efficiency of the MCS number 28 is 873/1024*6, the spectral efficiency of the MCS number 27 is 822/1024*6, and the MCS numbers 29 to 31 are reserved items. The spectral efficiency of the MCS number 0 is the spectral efficiency of the CQI number 1 in the first CQI table, and the spectral efficiency of the MCS number 1 is the spectral efficiency of the CQI number 2 in the first CQI table;

X is 14, Y is 20, the spectral efficiency of the MCS number 28 is 822/1024*6, the MCS numbers 29 to 31 are reserved items, and the spectral efficiency of the MCS number 0 is (the first CQI table) Spectrum efficiency of CQI number 1 in the ++ spectral efficiency of CQI number 2 in the first CQI table)/2, the spectral efficiency of the MCS number 1 is the spectral efficiency of the CQI number 2 in the first CQI table The spectral efficiency of the MCS number 2 is (the spectral efficiency of the CQI number 1 in the first CQI table + the spectral efficiency of the CQI number 3 in the first CQI table)/2;

X is 14, Y is 20, the spectral efficiency of the MCS number 28 is 822/1024*6, the spectral efficiency of the MCS number 29 is 873/1024*6, and the MCS number 30 is 910/1024*6. The MCS number 31 is 948/1024*6, and the spectrum efficiency of the MCS number 0 is (the spectral efficiency of the CQI number 1 in the first CQI table + the spectrum of the CQI number 2 in the first CQI table) Efficiency /2, the spectral efficiency of the MCS number 1 is the spectral efficiency of the CQI number 2 in the first CQI table, and the spectral efficiency of the MCS number 2 is (the CQI number 1 in the first CQI table) Spectral efficiency + spectral efficiency of CQI number 3 in the first CQI table)/2.

The above is some specific examples of the items included in the first MCS table, and is not limited thereto in practical applications.

In a possible design, the conversion precoding is enabled. Then, if the terminal device reports pi/2BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation level supported by the terminal device. The modulation order of the reserved item corresponding to at least one of the MCS numbers 29, 30, and 31 is determined according to the value of q.

For the MCS table, the conversion precoding is also corresponding. If the conversion precoding is enabled, there is a parameter q, and q can represent the lowest modulation order that the terminal device can support. Where, if q=2, there will always be a reserved item q in the MCS table (for example, the item corresponding to the MCS number 28 in the prior art), which causes a waste of state. For example, in the prior art, when q = 2, MCS number 28 and MCS number 29 are the same item, which is a redundant state. In view of this, the embodiment of the present application introduces more effective MCS indication states for saving state. For example, the embodiment of the present application may determine all items or partial items in the first MCS table according to the value of q.

In a possible design, the modulation order of the corresponding reserved item of at least one of the MCS numbers 29, 30, and 31 is determined according to the value of q, including: q=1, and the MCS number 29 corresponds to the modulation order. Number 1, MCS number 30 corresponds to modulation order 2, MCS number 31 corresponds to modulation order 4; and/or, q=2, MCS number 29 corresponds to modulation order 2, MCS number 30 corresponds to modulation order 4, MCS number 31 Corresponding to the modulation order of 6.

In a possible design, the conversion precoding is enabled. Then, if the terminal device reports pi/2BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation level supported by the terminal device. The number, the spectral efficiency corresponding to at least one MCS number is determined according to the value of q.

In a possible design, the spectral efficiency of the item corresponding to the MCS number 28 is a reserved value or a value greater than 772/1024*6, which is determined according to the value of q, or the MCS number 28 corresponds to The spectral efficiency of the term is one of two values greater than 772/1024*6, which is determined based on the value of q.

In a possible design, the spectral efficiency of the item corresponding to the MCS number 28 is a value that is reserved or greater than 772/1024*6, and is determined according to the value of q, including: q=1, corresponding to MCS number 28. The spectral efficiency of the term is reserved; and/or q = 2, the spectral efficiency of the term corresponding to MCS number 28 is one of the following spectral efficiencies: 822/1024*6, 873/1024*6, 910/1024*6 , 948/1024*6.

It can be seen that, in the embodiment of the present application, the modulation order of the corresponding reserved item of at least one of the MCS numbers 29, 30, and 31 can be determined according to the value of the q, thereby minimizing waste of the status item. Of course, the above are just some examples, and are not limited to this.

In a fifth aspect, a method of notifying a CQI is provided, which can be performed by a communication device, such as a terminal device. The method includes: the communication device learns the first CQI number according to the first CQI table; the communication device sends the first CQI number; the first CQI table includes: an item not included in the second CQI table; the second CQI table The medium modulation mode is a partial item of 64QAM.

Correspondingly, in a sixth aspect, a method for receiving a CQI is provided, which may be performed by a communication device, such as a network device, such as a base station. The method includes: the communication device receiving a first CQI number in the first CQI table; the communication device determining a modulation mode, a coding rate, and a spectral efficiency corresponding to the first CQI number; the first CQI table includes: An item not included in the two CQI tables; the modulation method in the second CQI table is a part of 64QAM.

An item that is not included in the second CQI table, for example, a corresponding item with a lower coding rate, that is, the MCS table provided by the embodiment of the present application includes an MCS with a lower coding rate, and such an MCS table can correspond to The lower the BLER, the MCS table provided by the embodiment of the present application can effectively adapt the requirements of the URLLC service.

In one possible design, the modulation in the first CQI table is that all items of the 64-phase quadrature amplitude modulation QAM are part of 64QAM in the second CQI table, and the part of 64QAM in the second CQI table include:

The CQI numbers corresponding to the partial items are equally spaced; or,

In a seventh aspect, a communication device is provided, such as a network device. The communication device has the function of implementing a network device in the design of the above method. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In one possible design, the specific structure of the communication device can include a processor and a transceiver. The processor and transceiver may perform the respective functions of the methods provided by the first aspect or any one of the fourth or sixth aspects of the above.

In one possible design, the specific structure of the communication device may include a processing module and a transceiver module. The processing module and the transceiver module may perform the respective functions of the methods provided by the first aspect or any one of the fourth or sixth aspects. In an eighth aspect, a communication device is provided, such as a terminal device. The communication device has the function of implementing the terminal device in the above method design. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In one possible design, the specific structure of the communication device can include a processor and a transceiver. The processor and transceiver may perform the respective functions of the methods provided by the second aspect or any one of the third or fifth aspects of the above.

In one possible design, the specific structure of the communication device may include a processing module and a transceiver module. The processing module and the transceiver module may perform the respective functions of the methods provided by the second aspect or any one of the third or fifth aspects of the above.

In a ninth aspect, a communication device is provided. The communication device may be a network device in the above method design, or a chip disposed in the network device. The communication device includes a memory for storing computer executable program code, and a processor coupled to the memory. Wherein the program code stored in the memory includes instructions, when the processor executes the instructions, causing the communication device to perform the method performed by the network device in any one of the first aspect or the fourth aspect or the sixth aspect .

In a tenth aspect, a communication device is provided. The communication device may be a terminal device in the above method design, or a chip disposed in the terminal device. The communication device includes a memory for storing computer executable program code, and a processor coupled to the memory. The program code stored in the memory includes instructions, when the processor executes the instructions, causing the communication device to perform the method performed by the terminal device in any one of the second aspect or the third aspect or the fifth aspect .

In an eleventh aspect, a communication system is provided, the communication system comprising a network device and a terminal device. The network device is configured to determine N MCS indexes in the MCS table, where the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by a value of 1024, which is less than or equal to a first threshold, where X is greater than or equal to An integer of 0, where N is a positive integer, N is greater than or equal to X; transmitting at least one MCS index of the N MCS indexes; the terminal device is configured to receive downlink control information; and acquiring, in the MCS table, according to the downlink control information At least one MCS index, the MCS table includes N MCS indexes, and the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by a value of 1024 that is less than or equal to a first threshold, where X is greater than or equal to 0. An integer, N is a positive integer, and N is greater than or equal to X.

In a twelfth aspect, a communication system is provided, the communication system comprising a network device and a terminal device. The terminal device is configured to send a first CQI number, where the first CQI number is determined according to the first CQI table, and the first MCS table includes one MCS number, where the first MCS table includes An item not included in the first CQI table, and a modulation mode in the first CQI table is at least one item of 64QAM; and a network device, configured to receive a first channel quality indicator CQI number in the first CQI table; An MCS number, the first MCS number is determined according to a first MCS table, where the first MCS table includes an item not included in the first CQI table, and a modulation manner in the first CQI table At least one item for 64QAM.

In a thirteenth aspect, a communication system is provided, the communication system comprising a network device and a terminal device. The terminal device is configured to learn the first CQI number according to the first CQI table, and send the first CQI number. The first CQI table includes: an item not included in the second CQI table; and the modulation mode in the second CQI table. a part of the 64QAM; the network device, configured to receive the first CQI number in the first CQI table; determine a modulation mode, a coding rate, and a spectrum efficiency corresponding to the first CQI number; the first CQI table includes: An item not included in the second CQI table; the modulation method in the second CQI table is a partial item of 64QAM.

In a fourteenth aspect, a computer storage medium is provided, wherein the computer readable storage medium stores instructions that, when run on a computer, cause the computer to perform any of the above-described aspects of any of the possible designs method.

A fifteenth aspect, a computer program product comprising instructions, wherein instructions stored in a computer program product, when run on a computer, cause the computer to perform any of the above-described aspects of any of the possible designs Methods.

The MCS table provided by the embodiment of the present application includes the MCS of the lower coding rate, and the MCS table can correspond to the lower BLER. The MCS table provided by the embodiment of the present application can effectively adapt the requirements of the URLLC service.

DRAWINGS

Figure 1 shows the usage scenarios of LDPC BG1 and BG2 in the eMBB service.

2 is a schematic diagram of an application scenario according to an embodiment of the present application;

3 is a flowchart of a first communication method according to an embodiment of the present application;

4 is a flowchart of a first communication method according to an embodiment of the present application;

4-1 is a schematic diagram of an application manner of an MCS table according to an embodiment of the present application;

4-2 is a schematic diagram of an application manner of an MCS table according to an embodiment of the present application;

FIG. 5 is a flowchart of a first communication method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a communication device according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a communication device according to an embodiment of the present application;

8A-8B are schematic diagrams of a communication device according to an embodiment of the present application.

Detailed ways

In order to make the objects, technical solutions, and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Hereinafter, some of the terms in the embodiments of the present application will be explained so as to be understood by those skilled in the art.

1) A terminal device, including a device that provides voice and/or data connectivity to a user, for example, may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (RAN) to exchange voice and/or data with the RAN. The terminal device may include a user equipment (UE), a wireless terminal device, a mobile terminal device, a subscriber unit, a subscriber station, a mobile station, a mobile station, and a remote station. Remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, or user Equipment (user device) and so on. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a portable, pocket, handheld, computer built-in or in-vehicle mobile device, smart wearable device, and the like. For example, personal communication service (PCS) telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (personal digital assistant, PDA), and other equipment. It also includes restricted devices, such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing capabilities. Examples include information sensing devices such as bar code, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.

By way of example and not limitation, in the embodiment of the present application, the terminal device may also be a wearable device. A wearable device, which can also be called a wearable smart device, is a general term for applying wearable technology to intelligently design and wear wearable devices such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are more than just a hardware device, but they also implement powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-size, non-reliable smartphones for full or partial functions, such as smart watches or smart glasses, and focus on only one type of application, and need to work with other devices such as smartphones. Use, such as various types of smart bracelets for smart signs monitoring, smart helmets, smart jewelry, etc.

2) A network device, for example comprising a base station (e.g., an access point), may refer to a device in the access network that communicates over the air interface with the wireless terminal device over one or more cells. The network device can be used to convert the received air frame to an Internet Protocol (IP) packet as a router between the terminal device and the rest of the access network, wherein the remainder of the access network can include an IP network. Network devices can also coordinate attribute management of air interfaces. For example, the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-A), or The next generation node B (gNB) in the 5G NR system may also be included in the embodiment of the present application.

In addition, in the embodiment of the present application, the network device provides a service for the cell, and the terminal device communicates with the network device by using a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a network device. (e.g., a base station) corresponding to a cell, the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell, where the small cell may include: a metro cell, a micro cell, and a pico cell. (pico cell), femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

In addition, multiple carriers can work at the same frequency on the carrier in the LTE system or the NR system. In some special scenarios, the concept of the carrier and the cell can be considered to be equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identifier (Cell ID) of the secondary cell operating in the secondary carrier are simultaneously carried. In this case, the concept of the carrier and the cell can be considered to be equivalent, for example, the UE accessing one carrier and accessing one cell are equivalent.

3) Subcarrier spacing, the interval value between the center position or the peak position of two adjacent subcarriers in the frequency domain in an orthogonal frequency division multiplexing (OFDM) system. For example, the subcarrier spacing in a long term evolution (LTE) system is 15 (kilohertz, kHz), and the subcarrier spacing of a 5G NR system may be 15 kHz, or 30 kHz, or 60 kHz, or 120 kHz, and the like.

4) The URLLC service requires a very high latency for the URLLC service. The one-way transmission delay from the sender to the receiver is within 0.5 ms, and the transmission reliability is 99.999% within 1 ms.

In order to meet the transmission delay requirement of the URLLC service, the data transmission of the wireless air interface can use a shorter time scheduling unit, for example, using a mini-slot, or using a larger sub-carrier time slot as the smallest. Time scheduling unit. Wherein, one mini-slot includes one or more time domain symbols, where the time domain symbols may be orthogonal frequency division multiplexing OFDM symbols. For a time slot with a subcarrier spacing of 15 kHz, including 6 or 7 time domain symbols, the corresponding time length is 0.5 ms; for a time slot with a subcarrier spacing of 60 kHz, the corresponding time length is shortened to 0.125 ms.

The generation of data packets of the URLLC service is bursty and random, and may not generate data packets for a long period of time, or may generate multiple data packets in a short time. The packets of the URLLC service are in most cases small packets, for example 50 bytes. The characteristics of the data packets of the URLLC service affect the way resources are allocated by the communication system. The resources herein include but are not limited to: time domain symbols, frequency domain resources, time-frequency resources, codeword resources, and beam resources. Generally, the allocation of system resources is performed by the access network device. The following uses the access network device as an example for description. If the access network device allocates resources for the URLLC service by using reserved resources, the system resources are wasted when there is no URLLC service. Moreover, the short delay feature of the URLLC service requires the data packet to be transmitted in a very short period of time. Therefore, the access network device needs to reserve a sufficient bandwidth for the URLLC service, thereby causing a serious drop in system resource utilization.

The URLLC service data usually adopts a shorter time scheduling unit to meet the requirements of ultra-short delay, for example, two time domain symbols with 15 kHz subcarrier spacing, or one time slot with 60 kHz subcarrier spacing, corresponding to seven time slots. The domain symbol, the corresponding length of time is 0.125ms.

5) Modulation coding mode table. In this paper, the modulation coding mode may be simply referred to as MCS. In this paper, the modulation coding mode table may be simply referred to as an MCS table. However, this article does not limit the modulation and coding methods will have other translation methods. The MCS table includes at least one of the following: modulation, coding rate, and spectral efficiency. At least one modulation and coding mode information may be included in an MCS table, and each modulation and coding mode information has a corresponding number (ie, a modulation coding mode number), and at least one of the following contents: modulation mode, coding Rate and spectral efficiency. Similarly, since the modulation and coding scheme is simply referred to as MCS, the modulation and coding scheme information may be simply referred to as MCS information, and the modulation and coding scheme index may be simply referred to as the MCS number.

For URLLC services, multiple MCS tables may be supported, each of which may correspond to one BLER or multiple BLERs.

In the MCS table, the relationship between the values can be referred to the following formula:

Spectrum efficiency = coding rate / 1024 * modulation order Qm (Equation 1)

Encoding rate = transfer of valid information / data resources used (Equation 2)

6) A channel quality indicator (CQI) table, the CQI table including at least one of a modulation mode, a coding rate, a spectral efficiency, and a BLER. At least one CQI (or at least one CQI) may be included in a CQI table, and each CQI has a corresponding index (ie, a CQI index), and corresponding to at least one of the following contents: modulation mode, coding rate, and frequency spectrum. Efficiency and BLER.

Among them, the MCS form can be considered to be obtained according to the CQI form. For example, the current CQI table includes 16 items, that is, 16 CQI indexes including 0 to 15. These 16 items can be directly put into the MCS table as the 16 items included in the MCS table, then these 16 items become 16 MCS in the MCS table. If the MCS table is indicated by 5 bits, then in the MCS table, the adjacent two of the 16 items can also be averaged to obtain another 16 items, and the MCS table can include 32 items in total.

See, for example, Table 1, which is a current CQI form:

Table 1

It can be seen that Table 1 includes a total of 16 items.

See Table 2 for the current MCS table for the physical downlink shared channel (PDSCH):

Table 2

Among them, the spectrum efficiency is also the spectrum efficiency. The MCS table shown in Table 2 can be understood to include 16 items in the CQI table shown in Table 1, and an additional 16 items obtained by averaging the adjacent two of the 16 items. .

Wherein, the modulation order 1 corresponds to pi/2 binary phase shift keying (BPSK), the modulation order 2 corresponds to QPSK, the modulation order 4 corresponds to 16QAM, and the modulation order 6 corresponds to 64QAM, modulation The order 8 corresponds to 256QAM.

7) The block error rate, referred to as BLER in this article, does not exclude other translation methods or other names. BLER is the percentage of blocks that are erroneous in all blocks sent. For example, the BLER can be equal to {x*10e-1, x*10e-2, x*10e-3, x*10e-4, x*10e-5, x*10e-6, x*10e-7, x* One of 10e-8, x*10e-9}, or it can be equal to other values. Among them, 10e-1=10 ^-1 =0.1, and other values of BLER are similar. Where x is a positive number, such as x=1 or 5, and can also be equal to other values. That is, it can be understood that the BLER can also be replaced with a correct rate, which can be equal to {1-x*1e-1, 1-x*1e-2, 1-x*1e-3, 1-x*1e-4,1. One of -x*1e-5, 1-x*1e-6, 1-x*1e-7, 1-x*1e-8 or 1-x*1e-9}.

8) Channel coding technology is a commonly used method to improve the reliability of data transmission in communication systems. At present, the channel coding technology standardization work of the 5G eMBB scenario has been roughly completed: the data channel will be encoded with a low density parity check code (LDPC), and the control channel will be Polar coded.

In the 5G eMBB scenario, the data channel uses the LDPC code as the only channel coding mode. The current standard gives two base matrices: BG1 and BG2. BG2 is used for all payload sizes with a coding rate lower than 1/4, all coding rates with a payload less than 308, and a scenario where the encoding rate is less than 2/3 when the payload is between 308 and 3840. In other cases, BG1 is generally used. Referring to FIG. 1, the usage scenarios of eMBB LDPC BG1 (also referred to as BG1) and LDPC BG2 (also referred to as BG2) are respectively divided, the horizontal axis represents the payload size, and the vertical axis represents the coding rate. The part that represents "BG2" and the part that draws "\" represent BG1.

The URL size of a URLLC scenario is generally smaller than that of an eMBB scenario, and in order to pursue higher reliability, a lower coding rate is often required. Therefore, BG2 can be used for the data channel of the URLLC scenario, but the embodiment of the present application is not limited thereto.

9) Channel state information (CSI). In general, CSI is further divided into periodic CSI (P-CSI), aperiodic CSI (A-CSI), and semi-persistent CSI (SPS-CSI). The meaning of the periodic CSI is that the terminal device periodically sends CSI to the network device, and the transmission of the aperiodic CSI is triggered by the network device triggered by downlink control information (DCI), and the semi-persistent CSI transmission network device passes. Downlink control information to trigger the terminal device to continuously send CSI for a period of time. It can be seen from the sending mechanism that the aperiodic CSI can make the network device instruct the terminal device to send the CSI at this time according to its own needs, thereby being more flexible. However, each trigger depends on the transmission of the DCI. In order to control the number of DCIs, reducing the control channel resources occupied by the DCI introduces semi-persistent CSI, and the periodic CSI is configured by the higher layer signaling, so the most DCI transmission is saved, and thus three types. The mechanism has been retained. It should be noted that only the periodic CSI and the aperiodic CSI are supported in the fourth generation mobile communication system (4G) system, and the aperiodic CSI must be sent in the physical uplink shared channel (PUSCH). The periodic CSI must be sent in a physical uplink control channel (PUCCH). In the current discussion of the 5G NR system, semi-persistent CSI is introduced, and it is also agreed that aperiodic CSI can be transmitted in the PUCCH. The CSI includes a CQI, a precoding matrix indicator (PMI), a rank indicator (RI), a reference signal receiving power (RSRP), and a channel state information reference signal resource indication (channel- State information reference signal resource indicator (CRI), one or more of information such as the number of non-zero wide band amplitude coefficients.

10) High-level signaling, which may refer to signaling sent by a higher layer protocol layer, and the upper layer protocol layer is at least one protocol layer above the physical layer. The upper layer protocol layer may specifically include at least one of the following protocol layers: a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (packet data convergence). Protocol, PDCP) layer, radio resource control (RRC) layer and non access stratum (NAS).

Dynamic signaling may refer to signaling sent by the physical layer, such as signaling or information sent through DCI.

11) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "Multiple" means two or more. In view of this, "a plurality" can also be understood as "at least two" in the embodiment of the present application. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. In addition, the character "/", unless otherwise specified, generally indicates that the contextual object is an "or" relationship.

In the various embodiments introduced in the present application, when introducing a table, "number" and "index" can be understood as the same concept, and English is index. For example, for the MCS table, the two concepts of the MCS number and the MCS index can be interchanged. For example, for the CQI table, the CQI number and the CQI index can be interchanged. For example, the items of the MCS table correspond to the modulation mode, coding rate, and spectral efficiency corresponding to one MCS number in the MCS table. The item of the CQI table corresponds to the modulation mode, coding rate, and spectral efficiency corresponding to one CQI number in the CQI table.

In addition, unless stated to the contrary, the embodiments of the present application refer to "first", "second" and the like are used to distinguish multiple objects, and are not used to limit the order, timing, priority or Importance.

The embodiments of the present application can be applied to an LTE system or a 5G NR system, and can also be applied to a next generation mobile communication system or other similar communication system.

In addition, in the following description, the technical solution provided by the embodiment of the present application is applied to the URL LC service as an example, and is not limited to the actual application. For example, the technical solution provided by the embodiment of the present application can also be applied to other technologies. A service with similar requirements to the URLLC service, or it can also be used for services such as eMBB.

The technical background of the embodiment of the present application is described below.

In the 5G system, the URLLC service requires extremely high latency, and the one-way transmission delay from the sender to the receiver is required to be within 0.5 milliseconds (millisecond, ms), and the transmission reliability is 99.999% within 1 ms.

The BLER corresponding to the MCS applied by the current eMBB service is 10e-1. For the URLLC service with an urgent delay, the system needs to support a lower BLER due to higher reliability. In view of the relationship between the BLER and the coding rate, if a lower BLER is to be required, a lower coding rate is required because the lower the coding rate, the lower the corresponding BLER.

The reason why the system is required to support a lower encoding rate in order to support a lower BLER is described below. The data transmission of the terminal device under the current communication conditions can only use the MCS corresponding to the MCS index 0 in the existing MCS table, corresponding to the error block rate 10e-1, where the uplink or downlink is not distinguished. It is assumed that in the case where other external conditions are not changed, transmissions supporting lower block error rates can only be exchanged by lowering the modulation order or lowering the coding rate.

If the coding rate is reduced, it means that less useful information is transmitted in the same system resources, and more information redundancy is introduced to improve reliability. For example, suppose that A bit is originally transmitted in a Z data resource, and the encoding rate is A/Z. On the 3*Z data resources, the A bit is repeated 3 times to form 3A bit transmission, and the coding rate at this time is A/3Z. It is clear that the latter has a lower encoding rate and thus higher accuracy.

If you reduce the modulation order, you can also achieve the purpose of using more data resources to transmit a small amount of useful information. However, since the modulation order has reached 2-QPSK in the existing MCS table, and pi/2BPSK is very close in performance to QPSK, it is impossible to use a lower modulation order to improve reliability.

In summary, it is reasonable to improve the reliability by reducing the coding rate. In view of this, the embodiment of the present application provides an MCS corresponding to a lower coding rate, so that the MCS can adapt the requirements of the URLLC service.

FIG. 2 is an application scenario of an embodiment of the present application. In Fig. 2, a network device and at least one terminal device are included, the network device and the terminal device operating in a 5G NR system, such as a base station. Among them, the terminal device and the network device can communicate through the 5G NR system.

Referring to FIG. 3, the first communication method is provided in the embodiment of the present application. In the following description, the application is applied to the application scenario shown in FIG. 2 as an example. The flow of this method is described below.

S31: The network device determines N MCS indexes in the MCS table, where the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by 1024 is less than or equal to the first threshold, where X is an integer greater than or equal to 0, where N is Positive integer, N=>X;

S32. The network device sends at least one MCS index of the N MCS indexes to the terminal device, where the terminal device receives at least one MCS index of the N MCS indexes. FIG. 3 sends the network device to the network device by using downlink control information. The MCS index is taken as an example, and the terminal device receives the downlink control information;

S33. The terminal device acquires, by using the downlink control information, at least one MCS index in the MCS table, where the MCS table includes N MCS indexes, and the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by 1024 or less. a first threshold, where X is an integer greater than or equal to 0, N is a positive integer, N => X;

S34. The terminal device determines an MCS according to the at least one MCS index.

S35. The terminal device transmits the first information according to the determined MCS.

In the embodiment of the present application, the number before the step is only an example, and is not a limitation on the actual execution order of the steps. In the application process, each step may also change the execution order according to different scenarios or requirements.

The terminal device obtains a CSI report by using the channel measurement of the CSI reference resource, and the terminal device sends the CSI obtained by encoding the CSI report to the network device, and the network device can receive the CSI from the terminal device.

S31 is an optional step because the network device can also send the MCS index to the terminal device without receiving the CSI from the terminal device.

In addition, S35 and S36 are also optional steps.

The downlink control information, for example, downlink control information (DCI), or other downlink control information, is exemplified by DCI. For example, by including an MCS field in the DCI, the MCS field can indicate the at least one MCS index.

The first information may be scheduled by DCI, or may be scheduled by other means.

The embodiment of the present application provides an MCS table, where the MCS table includes N MCS indexes, where each MCS index corresponds to one MCS, and one MCS corresponds to at least one of the following contents: a modulation mode, a coding rate (hereinafter also referred to as an encoding rate), and Spectral efficiency. In the N MCS indexes, the coding rate corresponding to the MCS index X is multiplied by 1024 to be less than or equal to YY. That is, the MCS table provided by the embodiment of the present application includes the MCS with a lower coding rate, and the MCS table can be used. Corresponding to the lower BLER, the MCS table provided by the embodiment of the present application can effectively adapt the requirements of the URLLC service. Optionally, the value of X in the MCS index X is 0, 1, 2, 3, 4, 5, 6, 7, 8 or a positive integer greater than or equal to 0.

In addition, the coding rate corresponding to the MCS index X may not be infinitely small, so the coding rate corresponding to the MCS index X multiplied by 1024 may be greater than or equal to the second threshold, in addition to being less than or equal to the first threshold, ie, Two threshold <= MCS index X corresponding coding rate × 1024 <= first threshold. The second threshold is, for example, 5 or 8, or may be other values. The first threshold is, for example, 119, or 120, or 40, or may be other values, which is not limited in the embodiment of the present application. In the following, the first threshold may also be represented by YY, and the second threshold may also be represented by YYY.

The MCS index X is, for example, an index with a smaller index value in the MCS table. Generally, the smaller the MCS index, the corresponding encoding method may be BPSK or QPSK, and then the encoding method corresponding to the MCS index X may be selected. Is BPSK or QPSK.

In the embodiment of the present application, the first threshold is 119, and the coding rate of the MCS index X in the MCS table multiplied by 1024 may include at least one of the following values: 5, 8, 10, 13, 14, 15 ,16,17,18,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42 , 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67 ,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92 , 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119.

In the current MCS table, the minimum coding rate multiplied by the value of 1024 is 120. It can be seen that the coding rate supported by the MCS table provided by the embodiment of the present application multiplied by 1024 can be smaller than the minimum in the current MCS table. The coding rate is multiplied by the value of 1024. That is to say, the coding rate supported by the MCS table provided by the embodiment of the present application is smaller than the minimum coding rate in the current MCS table, and such an MCS table can correspond to a lower BLER. Therefore, the requirements of the URLLC service are effectively adapted. In addition, in the MCS table provided by the embodiment of the present application, the coding rate corresponding to the smallest MCS index is smaller than the coding rate corresponding to the smallest MCS index in the CQI table, where the CQI table refers to the existing CQI table. For example, referring to Table 1, in the current CQI table, the coding rate corresponding to the smallest MCS index is 78. In the MCS table provided by the embodiment of the present application, the coding rate corresponding to the smallest MCS index is less than 78. That is to say, the MCS table provided by the embodiment of the present application can support a lower coding rate.

In the embodiment of the present application, the provided MCS table may correspond to at least two of the following encoding modes: LDPC BG1, LDPC BG2, and Polar, and may of course also correspond to other encoding modes. For example, the MCS table corresponds to LDPC BG2 and Polar, then in the MCS table, the number of MCS indexes corresponding to Polar is smaller than the number of MCS indexes corresponding to LDPC BG2, that is, in the MCS table, corresponding to higher The number of MCS indexes of the coding rate is large, which also enables the MCS table provided by the embodiment of the present application to be better compatible with existing MCS tables.

If the coding rate corresponding to an MCS index is less than F, the coding mode corresponding to the MCS index may be Polar, or BG2. F is, for example, greater than or equal to 0.25, or is understood to mean that F belongs to the first set, and the first set includes a minimum of 0.25.

In addition, according to the calculation of the existing protocol, the fluctuation of the coding rate causes the resource allocation to change drastically, so that if the terminal device can accurately report the coding rate or the spectral efficiency value corresponding to the signal-noise ratio (SNR), Then it can help the system save a lot of resources and improve system utilization. According to the evaluation, in particular, when the time domain resource for transmitting data is 2 symbols and the encoding rate *1024 is 30, at least the required frequency domain resource is 212 Resource Block (RB), and the encoding rate *1024 is 34. The required frequency domain resource is 192 RB, the frequency domain resource required for the coding rate *1024 is 37 is 172 RB, and the frequency domain resource required for the coding rate *1024 is 42 is 152 RB. Therefore, in the CQI table or the MCS table of the URLLC, different from the original table, if the distance between two adjacent points can reach less than or equal to the third threshold, the use efficiency of the system resources can be improved. Therefore, in the MCS table provided by the embodiment of the present application, the modulation mode corresponding to the MCS index X and the MCS index X+1 is the same, and the difference between the coding rate corresponding to the MCS index X and the coding rate corresponding to the MCS index X+1 is *1024. It may be less than or equal to the third threshold.

In addition to the condition regarding the third threshold, in the embodiment of the present application, the modulation mode corresponding to the MCS index X is the same as the modulation mode corresponding to the MCS index X+1, and the coding rate corresponding to the MCS index X corresponds to the MCS index X+1. The difference between the encoding rates *1024 can also be greater than or equal to the fourth threshold. The value of the fourth threshold is related to the channel estimation accuracy of the terminal device. If the SNR corresponding to 10 is 0.5 dB, the channel estimation accuracy of the terminal device is also 0.5 dB, that is, the coding rate difference is lower than this. The value is incapable of being recognized by the terminal device. Therefore, in the MCS table provided in the embodiment of the present application, the difference between the coding rates of the two adjacent items *1024 is greater than or equal to the fourth threshold. Regarding the two conditions of the third threshold and the fourth threshold, at least one of the MCS tables provided in the embodiments of the present application may exist. For example, in the case where the difference *1024 of the coding rates of the adjacent two items is greater than or equal to the fourth threshold, if the distance is too far to be detrimental to the resource allocation, the difference in the coding rate of the adjacent two items can also be made. The value *1024 is less than or equal to the third threshold.

The third threshold is, for example, 1, 2, 3, 4, 5, 11, 12, or 13, or other values may be taken. The fourth threshold is, for example, 1, 2, 3, 4, 8, 9, 10 or 11, or other values may be used. The values of the third threshold and the fourth threshold are not limited in the embodiment of the present application.

The MCS table provided by the embodiment of the present application is described below by some examples.

First, example A.

Example A is to obtain a new MCS table by modifying an existing MCS form or CQI form. In the example A, the coding mode corresponding to all the MCS indexes included in the MCS table may be BG2, but is not limited thereto, for example, may also correspond to Polar, or the coding mode corresponding to different MCS indexes included in the MCS table. It may also be different.

In Example A, the MCS table can support a lower BLER relative to the existing 10e-1, which is described below as being divided into different BLERs.

a. For example, the MCS table supports a BLER of 10e-5.

In general, the MCS table may be 5 bits, and the MCS table may include 32 items, or the MCS table may also be 4 bits, and the MCS table may include 16 items. In the following introduction process, the MCS table is 5 bits and the MCS table is 4 bits, respectively.

1. The MCS table is 5 bits.

When the MCS table is 5 bits, the G item can be removed from the original MCS table (as shown in Table 2), and the G item is added. The newly added G item corresponds to a lower coding rate, and G is a positive integer. It is considered that the embodiment of the present application is to provide an MCS capable of supporting a lower coding rate, and according to Table 2, the larger the MCS index is, the larger the corresponding coding rate is, and the G item removed from the original MCS table is The G item with the highest MCS index, for example, G=4, the item corresponding to the MCS index 28, the item corresponding to the MCS index 29, the item corresponding to the MCS index 30, and the item corresponding to the MCS index 31 may be removed from Table 2, or Because the items corresponding to the MCS indexes 29, 30, and 31 are all reserved items, it is also considered to remove the valid G items. For example, the item corresponding to the MCS index 25, the item corresponding to the MCS index 26, and the MCS index 27 may be removed. The entry corresponding to the item and the MCS index 28 is equivalent to removing the item with a higher coding rate from the original MCS table, so that the new MCS table supports the low coding rate more effectively. Alternatively, the G item removed from the original MCS table may also be a randomly selected G item, and the MCS index corresponding to the removed G item may be continuous or discontinuous, or may be selected to remove the last 64QAM corresponding to the original MCS table. Item, the specific is not limited.

As a first example, G=4, an MCS table can refer to Table A1:

Table A1

One row in Table A1 can be understood as an MCS. It can be seen that one MCS corresponds to one MCS index and a series of parameters. In addition, in the MCS table, the parameters corresponding to one MCS may include other parameters in addition to the parameters shown in Table A1, but are not related to the solution of the present application, so they are not listed one by one.

For the correspondence between the numbering of the modulation method and the specific modulation method, refer to the previous introduction. The subsequent tables are similar and will not be repeated.

In Table A1, the Old MCS Index indicates the index of the corresponding item in the original MCS table, and the New MCS Index indicates the index of the corresponding item in the new MCS table. It can be seen that in Table A1, there is no corresponding New MCS Index after the Old MCS Index 28, indicating that the table A1 is the item corresponding to the MCS index 28, the item corresponding to the MCS index 29, and the MCS index 30 are removed from the original MCS table. The corresponding item and the item corresponding to the MCS index 31 are taken as an example. Among them, New MCS Index0 ~ New MCS Index3, these four are new. It can be understood that New MCS Index0 and New MCS Index2 are newly added, and the corresponding item of New MCS Index1 is obtained by the corresponding item of New MCS Index0 and the corresponding item of New MCS Index2, and the corresponding item of New MCS Index3 is The item corresponding to New MCS Index 2 and the item corresponding to New MCS Index 4 are obtained by averaging. For example, the coding rate corresponding to New MCS Index 1 is multiplied by 1024 to be equal to 66, which is obtained by multiplying the coding rate corresponding to New MCS Index 0 by the value 54 of 1024 and the coding rate corresponding to New MCS Index 2 by the value 78 of 1024. 66=(54+78)/2, New MCS Index1 corresponds to a spectral efficiency of 0.1289, which is also obtained by averaging the spectral efficiency 0.1055 of New MCS Index0 and the spectral efficiency of 0.1523 corresponding to New MCS Index2, 0.1289=(0.1055+ 0.1523)/2. The method of obtaining the item corresponding to New MCS Index 3 is similar to the method of obtaining the item corresponding to New MCS Index 1, and will not be described again.

In the new item in Table A1, the correspondence between the MCS index and each parameter is only an example. For example, the modulation mode corresponding to New MCS Index0 may not be 2, or the corresponding coding rate multiplied by 1024 may not be 54. Etc., the specific one is not limited, as long as at least one of the newly added items has a corresponding encoding rate lower than the lowest encoding rate in the original MCS table.

For example, if YY is 120, the MCS index X may include at least one of the new MCS index 0 to the new MCS index 3 in the table A1.

As a second example, G=6, an MCS table can refer to Table A2:

Table A2

Among them, the problems similar to Table A1 are not introduced any more, and reference can be made to the introduction of Table A1.

It can be seen that in Table A2, there is no corresponding New MCS Index after the Old MCS Index 26, indicating that the table A2 is the item corresponding to the MCS index 26, the item corresponding to the MCS index 27, and the MCS index 28 are removed from the original MCS table. The corresponding item, the item corresponding to the MCS index 29, the item corresponding to the MCS index 30, and the item corresponding to the MCS index 31 are taken as an example. Among them, New MCS Index0 ~ New MCS Index5, these 6 items are new. It can be understood that New MCS Index0, New MCS Index2 and New MCS Index4 are newly added, and the corresponding items of New MCS Index1 are obtained by the corresponding items of New MCS Index0 and the corresponding items of New MCS Index2, New MCS Index3. The corresponding item is obtained by the corresponding item of New MCS Index2 and the item corresponding to New MCS Index4, and the item corresponding to New MCS Index5 is obtained by the item corresponding to New MCS Index4 and the item corresponding to New MCS Index6. For the specific method of obtaining the new item, refer to the introduction of Table A1.

For example, if YY is 120, the MCS index X may include at least one of the new MCS index 0 to the new MCS index 5 in the table A2.

In the new item in Table A2, the correspondence between the MCS index and each parameter is only an example. For example, the modulation mode corresponding to New MCS Index0 may not be 2, or the corresponding coding rate multiplied by 1024 may not be 16 Etc., the specific one is not limited, as long as at least one of the newly added items has a corresponding encoding rate lower than the lowest encoding rate in the original MCS table.

As an eighth example, an MCS table can refer to Table A8:

Table A8

In Table A8, the corresponding value for each possibility is the MCS index. Similarly to Table A4, Table A8 can actually include multiple MCS tables, each of which can belong to a separate MCS table. In Table A8, the items corresponding to the MCS index that do not have a correspondence with the old MCS index are added.

Taking the MCS table corresponding to the possibility 1 as an example, it can be seen that in the table A8, the possibility 1 has no corresponding New MCS Index after the Old MCS Index 26, indicating that the table A8 is the MCS index removed from the original MCS table. The corresponding item, the item corresponding to the MCS index 27, the item corresponding to the MCS index 28, the item corresponding to the MCS index 29, the item corresponding to the MCS index 30, and the item corresponding to the MCS index 31 are taken as an example. Among them, New MCS Index0 ~ New MCS Index5, these 6 items are new.

For example, YY is 120. For possibility 1, the MCS index X may include at least one of the new MCS index 0 to the new MCS index 6 in Table A8.

In the new item in Table A8, the correspondence between the MCS index and each parameter is only an example. For example, in the possibility 1, the modulation mode corresponding to New MCS Index0 may not be 2, or the corresponding coding rate is multiplied by 1024. The value may not be 8, etc., and the specific one is not limited, as long as at least one of the added items has a corresponding encoding rate lower than the lowest encoding rate in the original MCS table.

As a ninth example, an MCS table can refer to Table A9:

Table A9

In Table A9, the corresponding value for each possibility is the MCS index. Similarly to Table A4, Table A9 can actually include multiple MCS tables, each of which can belong to a separate MCS table. In Table A9, the items corresponding to the MCS index that do not have a correspondence with the old MCS index are new.

Taking the MCS table corresponding to the possibility 1 as an example, it can be seen that in Table A9, the possibility 1 has no corresponding New MCS Index from the Old MCS Index 28, indicating that the table A9 is the MCS index 28 removed from the original MCS table. The corresponding item, the item corresponding to the MCS index 29, the item corresponding to the MCS index 30, and the item corresponding to the MCS index 31 are taken as an example. Among them, New MCS Index0 ~ New MCS Index3, these four are new.

For example, YY is 120. For possibility 1, the MCS index X may include at least one of the new MCS index 0 to the new MCS index 4 in the table A8.

In the new item in Table A9, the correspondence between the MCS index and each parameter is only an example. For example, in the possibility 1, the modulation mode corresponding to New MCS Index0 may not be 2, or the corresponding coding rate is multiplied by 1024. The value may not be 22, etc., and the specific one is not limited, as long as at least one of the added items has a corresponding encoding rate lower than the lowest encoding rate in the original MCS table.

There is also an example, an MCS table can refer to Table A9-1:

Table A9-1

2. The MCS table is 4 bits.

When the MCS table is 4 bits, the original CQI table (refer to Table 1) can be directly extracted to form a new MCS table. The new MCS table may include multiple items in the original CQI table, and may also include H items not included in the original CQI table, that is, when a new MCS table is formed, in addition to directly extracting items in the original CQI table. , will also add H items in the new MCS table. For example, an entry corresponding to MCS index 1 in the new MCS table may not be included in the original CQI table. As a thirteenth example, an MCS table can refer to Table A13:

Table A13

In Table A13, the corresponding value for each possibility is the MCS index. It can be understood that a plurality of MCS tables can actually be included in Table A13. For example, old CQI index, probability 1, modulation, code rate, and Spectral Efficiency, these four columns can form an MCS table, for example, old CQI index, probability 2, modulation, code rate, and Spectral Efficiency. Form an MCS form, ie each possibility can belong to a separate MCS form. In Table A13, the items corresponding to the MCS index that do not have a correspondence with the old CQI index are added.

In Table A13, for example, for the possibility 1, New MCS Index0 to New MCS Index 4, these five items are new.

For example, YY is 120. For possibility 1, the MCS index X may include at least one of the new MCS index 0 to the new MCS index 6 in the table A13.

In the new item in Table A13, the correspondence between the MCS index and each parameter is only an example. For example, in the possibility 1, the modulation mode corresponding to New MCS Index0 may not be 2, or the corresponding coding rate is multiplied by 1024. The value may not be 8, etc., and the specific one is not limited, as long as at least one of the added items has a corresponding encoding rate lower than the lowest encoding rate in the original MCS table.

c. For example, the MCS table supports the BLER of 10e-3.

In the following introduction process, the MCS table is 5 bits and the MCS table is 4 bits, respectively.

5. The MCS table is 5 bits.

There is also an example, an MCS table can refer to Table A32-1:

Table A32-1

6. The MCS table is 4 bits.

As a thirty-sixth example, an MCS table can be referred to Table A36:

Table A36

d. For example, the MCS table supports a BLER of 10e-4.

7. The MCS form is 5 bits. As a forty-second example, an MCS table can be referred to Table A42:

Table A42

8. The MCS table is 4 bits.

As a forty-sixth example, an MCS table can be referred to Table A46:

Table A46

As a forty-ninth example, an MCS table can be referred to Table A49:

Table A49

As a fiftyth example, an MCS table can be referred to Table A50:

Table A50

There is also an example, an MCS table can refer to Table A50-1:

Table A50-1

The example A as described above is to obtain a new MCS table provided by the embodiment of the present application by modifying an existing MCS table or a CQI table.

In addition, the current URLLC supports the lower BLER feature, so the terminal device and the network device support two CQI tables, respectively, which correspond to different BLERs, for example, the two CQI tables are respectively called the first CQI table and the second. CQI form. Wherein, all or part of the two CQI tables are different. For example, the BLER corresponding to the first CQI table is 10e-5, and the first CQI table introduces more low spectral efficiency items than the second CQI table. For example, the BLER corresponding to the second CQI table is 10e-1, the second CQI table may multiplex the CQI table of the eMBB, and the second CQI table includes more high spectral efficiency items than the first CQI table. For example, the second CQI table may refer to Table 1 above. The first CQI table may refer to Table 2.1A below, where Z1, Z2 are positive integers greater than or equal to 30 and less than 78. Z1 is smaller than Z2. Alternatively, Z1 and Z2 are 31, 33, 34, 35, 36, 37, 38, 41, 43, 44, 45, 46, 47, 48, 49, 51, 53, 55, 57, 58, 59, Two of 60, 61, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77. Wherein, the Z2 ratio is less than or equal to 10, and the Z2 ratio is less than or equal to 10. Table 2.1A is as follows:

Table 2.1A

Since the URLLC supports two CLER tables of the BLER, if the two MCS tables corresponding to the CQI table are also supported, it is necessary to solve the problem of how the terminal device and the network device determine which MCS table is used for the data transmission. There are two current solutions: 1. Which MCS table is used by the network device to notify the terminal device of data reception or data transmission through dynamic signaling DCI; 2. The network device is semi-statically configured by the RRC signaling to the terminal device MCS table. Both the terminal device and the network device use this previously configured MCS table for data transmission before the terminal device receives the new RRC configuration signaling. A disadvantage of the first scheme described above is that more additional signaling overhead is introduced. The second scheme mentioned above uses RRC signaling or other high-level signaling, and these signaling reconfigurations require a long waiting period, so it is not suitable for dynamic scheduling of URLLC, which is a more urgent delay. The most suitable MCS form.

In view of this, in an embodiment, a new MCS table is provided in the embodiment of the present application, and the MCS table is, for example, a first MCS table, and the first MCS table includes all and part of the CQI corresponding to the two BLERs. The item, and thus one MCS table, may correspond to at least two CQI tables of different BLERs, ie avoiding additional signaling overhead and achieving the benefit of maintaining scheduling flexibility and improving system efficiency.

In the first MCS table, for one MCS number X, the modulation scheme corresponding to the MCS number X-1 and the MCS number X is QPSK, and the modulation scheme corresponding to the MCS number X+1 is 16QAM. The coding rate of the MCS number X is equal to one of the following:

Rounding up {(the encoding rate of the MCS number X-1*2+ the encoding rate of the MCS number X+1*4)/4},

Rounding down {(the encoding rate of the MCS number X-1*2+ the encoding rate of the MCS number X+1*4)/4},

Rounding {(the encoding rate of the MCS number X-1*2+ the encoding rate of the MCS number X+1*4)/4}, and,

(The coding rate of the MCS number X-1*2+ the coding rate of the MCS number X+1*4)/4.

In the first MCS table, for one MCS number Y, the modulation mode corresponding to the MCS number Y-1 and the MCS number Y is 16QAM, and the modulation mode corresponding to the MCS number Y+1 is 64QAM. The coding rate of the MCS number Y is equal to one of the following:

Round up {(the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8},

Rounding down {(the encoding rate of the MCS number Y-1*4+the encoding rate of the MCS number Y+1*6)/8},

Rounding {(the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8}, and,

(The encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8.

Where Y is greater than X+2.

The case as described above is in the case where the conversion precoding is not enabled, or in the case of cyclic prefix (CP)-orthogonal frequency division multiplexing (OFDM).

It can be understood that in the first MCS table, only the items corresponding to the low modulation order are retained at the modulation order intersection. In the prior art, two items corresponding to the same spectral efficiency are reserved at the handover, except that the modulation orders corresponding to the two items are different. In order to reduce the number of status items in the MCS table, the embodiment of the present application retains only one of the items, and the items of the low modulation order are reserved to ensure higher reliability. Because in general, under the same spectral efficiency, the lower the modulation order, the better the reliability. In addition, for the MCS table, the corresponding transform precoding is also performed. If the conversion precoding is enabled, There is a parameter q, and q can represent the minimum modulation order supported by the terminal device. Where, if q=2, there will always be a reserved item q in the MCS table (for example, the item corresponding to the MCS number 28 in the prior art), which causes a waste of state. For example, in the prior art, when q = 2, MCS number 28 and MCS number 29 are the same item, which is a redundant state.

In view of this, the embodiment of the present application introduces more effective MCS indication states for saving state. For example, the embodiment of the present application may determine all items or partial items in the first MCS table according to the value of q.

Optionally, the conversion precoding is enabled; if the terminal device reports pi/2BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation order supported by the terminal device; at least one MCS The spectral efficiency corresponding to the number is determined according to the value of q.

Optionally, the conversion precoding is enabled; if the terminal device reports pi/2BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation order supported by the terminal device; at least one MCS The modulation order and spectral efficiency corresponding to the number are determined according to the value of q.

Optionally, the conversion precoding is enabled; if the terminal device reports pi/2BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation order supported by the terminal device; at least one MCS The reservation corresponding to the number and the first value are determined according to the value of q, and the first value is a value greater than 772/1024*6.

Optionally, the conversion precoding is enabled; if the terminal device reports pi/2BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation order supported by the terminal device; at least one MCS The first value or the second value corresponding to the number is determined according to the value of q, and the first value and the second value are both greater than 772/1024*6.

In the embodiment of the present application, if the terminal device supports pi/2BPSK modulation, the terminal device reports to the network device, and if the network device receives the reporting of the terminal device, that is, the network device determines that the terminal device reports the support of pi/2BPSK modulation, then q is equal to 1, otherwise, q is equal to 2, and the modulation order of the corresponding reservation item of at least one of the MCS numbers 29, 30, 31 in the first MCS table is determined according to the value of q, It can be understood that, according to the value of q, the modulation order of all items or partial items in the first MCS table can be determined. Actually, it is determined that the items of the modulation order are unrestricted according to the value of q. At least one of the MCS numbers 29, 30, and 31 herein is merely an example.

For example, the modulation order of the reserved item corresponding to at least one of the MCS numbers 29, 30, and 31 is determined according to the value of q, including but not limited to at least one of the following two cases:

q=1, MCS number 29 corresponds to modulation order 1, MCS number 30 corresponds to modulation order 2, MCS number 31 corresponds to modulation order 4;

q=2, MCS number 29 corresponds to modulation order 2, MCS number 30 corresponds to modulation order 4, and MCS number 31 corresponds to modulation order 6.

For example, the modulation order of the reserved item corresponding to at least one of the MCS numbers 28, 29, 30, and 31 is determined according to the value of q, including but not limited to at least one of the following two cases:

q=1, MCS number 28 corresponds to modulation order 1 and spectrum efficiency is reserved value, MCS number 29 corresponds to modulation order 2 and spectrum efficiency is reserved value, MCS number 30 corresponds to modulation order 4 and spectrum efficiency is reserved Value, MCS number 31 corresponds to modulation order 6 and the spectral efficiency is a reserved value;

q=2, MCS number 28 corresponds to modulation order 6 and the spectral efficiency is greater than 772/1024*6, MCS number 29 corresponds to modulation order 2 and spectral efficiency is reserved, MCS number 30 corresponds to modulation order 4 and spectrum The efficiency is a reserved value, the MCS number 31 corresponds to the modulation order of 6 and the spectral efficiency is a reserved value.

Referring to FIG. 4, the embodiment of the present application provides a second communication method, which is also referred to as an MCS receiving and notifying method. In the following description, the application scenario shown in FIG. 2 is applied as an example. The flow of this method is described below.

S41. The terminal device sends a first CQI number to the network device, where the network device receives the first CQI number, where the first CQI number is determined according to the first CQI table.

S42. The network device sends the first MCS number, where the terminal device receives the first MCS number, where the first MCS number is determined according to the first MCS table, where the first MCS table includes an item not included in the first CQI table, and The modulation method in a CQI table is at least one item of 64QAM.

In the embodiment of the present application, “number” and “index” may be understood as the same meaning. For example, the CQI index and the CQI number are alternative concepts, or the MCS index and the MCS number are alternative concepts.

The first CQI table may be pre-defined by the protocol, and the terminal device is pre-set according to the protocol or pre-stored by the terminal device; or the terminal device selects according to the downlink channel state from at least two predefined tables; or It is notified by the network device to the terminal device. Specifically, the method for the network device to notify the terminal device may be that the network device selects one of the uplink channel state or the downlink channel state from at least two predefined tables and notifies the terminal device. The CQI table is used to describe the mapping relationship between the CQI number and the item. The mapping relationship of the CQI table in the embodiment of the present application is only for the convenience of understanding the example given in the present application. The expression form of the CQI table in the present application includes and is not limited to Therefore, that is, the CQI table can have various combinations, and as long as the mapping relationship between the CQI number and the item can be embodied, it belongs to the scope of protection of the present application.

The first MCS table may be pre-defined by a protocol, and the terminal device is pre-set according to a protocol or pre-stored by the terminal device; or the terminal device selects from at least two predefined MCS tables according to a downlink channel state; or It can be notified by the network device to the terminal device. Specifically, the method for the network device to notify the terminal device may be that the network device selects one of the uplink channel state or the downlink channel state from at least two predefined tables and notifies the terminal device. The MCS table is used to describe the mapping relationship between the MCS number and the item. The mapping relationship of the MCS table in the embodiment of the present application is only for the convenience of understanding the example given in the present application. The representation form of the MCS table in the present application includes and is not limited to Therefore, that is, the MCS table can have various combinations, as long as the mapping relationship between the MCS number and the item can be reflected, which belongs to the scope of protection of the present application.

Specifically, the terminal device determines the first spectrum efficiency according to the measured first SINR, and then acquires the first CQI number corresponding to the first spectrum efficiency according to the first spectrum efficiency and the first CQI table. The first CQI table is pre-stored by the terminal device.

Specifically, the item corresponding to the CQI number may represent a line in the CQI table where the CQI number is located, or may represent a modulation mode, a spectrum efficiency, and a coding rate corresponding to the CQI number in a CQI table, and may also represent a CQI. The CQI number in the table corresponds to the range, and may also represent that the value corresponding to the CQI number in a CQI table is empty and is not used. It should be understood that, in general, the CQI number 0 corresponds to the meaning outside the range, that is, the received signal to noise ratio of the terminal device is lower than the preset threshold.

Specifically, the item corresponding to the MCS number may represent a row of the CQIMCS in an MCS table, or may represent a modulation mode, a spectrum efficiency, and a coding rate corresponding to the MCS number in an MCS table, or may represent an MCS table. The modulation mode corresponding to the MCS number and the reserved information reserved may also represent that the value corresponding to the MCS number in an MCS table is empty and is not used. It should be understood that the reserved information is reserved. The current MCS notification does not include the coding rate and the spectrum efficiency. Therefore, the coding rate or spectrum efficiency required for the current transmission is notified by the MCS or higher layer signaling previously notified by the pre-defined or network device. The MCS is ok.

Specifically, the first MCS table includes an item that is not included in the first CQI table, and the modulation mode in the first CQI table is at least one item of a 64-phase quadrature amplitude modulation QAM. Specifically, the first MCS table includes: an item not included in the first CQI table, and further includes at least one of XXX1 to XXX5. The items included in the first MCS table with a modulation mode of 64QAM may be one item or multiple items, and each of the items of the modulation mode of 64QAM includes a modulation mode, a coding rate, and a spectrum efficiency, and there is one The corresponding MCS number.

It should be understood that XXX1~XXX5, the location and number of YYY1 are only schematic, that is, the corresponding part of 64QAM can also include only XXX1~XXX4, and YYY can also include YYY1 and YYY2.

Table C2

Specifically, the network device determines the first CQI table by predefining or from at least two CQI tables. The first CQI number sent by the terminal device is then received. It can be understood that the network device has determined or learned the first CQI table after receiving the first CQI number.

The network device may determine a corresponding modulation mode, a coding rate, and a spectrum efficiency according to the received first CQI number. The network device determines the first MCS number in the first MCS table according to the received first CQI number and the first MCS table. The modulation mode, the coding rate, and the spectrum efficiency corresponding to the first MCS number may be the same as the modulation mode, the coding rate, and the spectrum efficiency corresponding to the first CQI number, or may be different, and the present application is not limited thereto. It can be understood that the network device further determines the first MCS table, and specifically includes the network device determining the first MCS table according to the first CQI number.

The network device sends the first MCS number. Specifically, the network device may send the first MCS number by using high layer signaling or downlink control information.

Specifically, the first MCS table includes all items except the item having the smallest CQI number in the first CQI table. The first MCS table includes all items except the item of the CQI number 0 corresponding to the first CQI table, that is, the first MCS table does not include all items except the items in the range of the first CQI table.

Optionally, it can be understood that the first MCS table includes all valid items in the first CQI table. The valid item is an item whose corresponding item is outside the range and/or whose value is null.

Illustratively, assume that the first MCS table includes 16 items or 32 items. In general, the CQI table is as shown in Tables 1 and 2, and the items corresponding to the excluded items and/or the values outside the range are 15 items. That is, the first MCS table includes 15 valid items in this CQI table. It can be understood that, assuming that the CQI table includes seven items having an empty value and a corresponding item outside the range, the first MCS table includes eight valid items in the CQI table.

In the embodiment of the present application, the total number of items in the first MCS table is 16, and the number of items not included in the first CQI table is 1.

Optionally, the size of the MCS bit field in the downlink control information corresponding to the MCS table is 4 bits.

Specifically, the number of items not included in the first CQI table included in the first MCS table is 1, that is, the first MCS table includes an item not included in the first CQI table.

Illustratively, in general, the CQI table is as shown in Tables C1 and C2, and the items corresponding to the excluded items and/or the values outside the range are 15 items. The first MCS table includes 15 items in the first CQI table and 1 item not included in the first CQI table.

For example, the coding rate of the 1 item not included in the first CQI table is smaller than the coding rate of the CQI number 1 in the first CQI table. As another example, the spectral efficiency of the 1 term not included in the first CQI table is less than the spectral efficiency of the CQI number 1 in the first CQI table. When the network device receives the CQI number 1 or the CQI number 0 sent by the terminal device, the network device can also schedule the terminal device at a lower coding rate, so that the terminal device can still meet the service requirements of the URLLC. Thereby ensuring the reliability of the URLLC service transmission.

Optionally, the MCS number 0 is an item that is not included in the first CQI table. According to the MCS table design principle of spectrum efficiency from small to large, it can be known that the spectrum efficiency corresponding to MCS number 0 is smaller than the spectrum efficiency corresponding to CQI table number 1. When the network device receives the CQI number 1 or the CQI number 0 sent by the terminal device, the network device can also schedule the terminal device at a lower coding rate, so that the terminal device can still meet the service requirements of the URLLC. Thereby ensuring the reliability of the URLLC service transmission.

Optionally, the MCS number 1 is an item that is not included in the first CQI table. According to the design of the spectrum efficiency from small to large, the spectral efficiency corresponding to one possible MCS number 1 is equal to (the spectral efficiency corresponding to CQI number 1 in the first CQI table + the spectral efficiency corresponding to CQI number 2 in the first CQI table) divided by 2 . The spectral efficiency corresponding to one possible MCS number 1 is smaller than the spectral efficiency corresponding to CQI number 2 in the first CQI table, and larger than the spectral efficiency corresponding to CQI number 1 in the first CQI table. It can be known from the above that when the network device receives the CQI number 1 or the CQI number 2 sent by the terminal device, the network device can also schedule the terminal device corresponding to the medium spectrum efficiency MCS number 1, so that the terminal device can still satisfy the URLLC service. demand. Thereby ensuring system efficiency and reliability of URLLC service transmission.

In the embodiment of the present application, the MCS number of the item not included in the first CQI table in the first MCS table is one of the following: MCS number 0, MCS number 1, and MCS number 3.

Optionally, the MCS number 3 is an item that is not included in the first CQI table. According to the design of the spectrum efficiency from small to large, the spectral efficiency corresponding to one possible MCS number 3 is equal to (the spectral efficiency corresponding to CQI number 2 in the first CQI table + the spectral efficiency corresponding to CQI number 3 in the first CQI table) divided by 2 . The spectral efficiency corresponding to one possible MCS number 3 is smaller than the spectral efficiency corresponding to CQI number 3 in the first CQI table, and larger than the spectral efficiency corresponding to CQI number 2 in the first CQI table. It can be known from the above that when the network device receives the CQI number 2 or the CQI number 3 sent by the terminal device, the network device can also schedule the terminal device corresponding to the medium spectrum efficiency MCS number 3, so that the terminal device can still satisfy the URLLC service. demand. Thereby ensuring system efficiency and reliability of URLLC service transmission. It can be understood that since the spectral efficiency only takes 4 bits after the decimal point, the value divided by 2 (including the spectral efficiency corresponding to the CQI number 2 in the first CQI table + the spectral efficiency corresponding to the CQI number 3 in the first CQI table) includes The number of digits after the decimal point of 5 digits or more is rounded to the spectral efficiency of 4 digits after the decimal point. It can be considered that the spectral efficiency corresponding to MCS number 3 is equal to (the spectral efficiency corresponding to CQI number 2 in the first CQI table + first Divided by the spectral efficiency of CQI number 3 in the CQI table).

It can be understood that the new item corresponding to the coding rate or spectral efficiency added here is not included in the first CQI table. However, the specific added position may be MCS number 0, 1, 3, or other positions, and if added to other locations, it is within the protection scope of the present application.

The spectral efficiency of the item of MCS number 0 in the first MCS table is less than the spectral efficiency of the item of CQI number 1 in the first CQI table.

For example, the spectral efficiency of the item of CQI number 1 in the first CQI table is 0.07813, the coding rate *1024 corresponding to QPSK modulation is 40, and the coding rate *1024 corresponding to pi/2BPSK modulation is 80.

The spectrum efficiency of the item of MCS number 0 in the first MCS table is 0.0195, the coding rate *1024 corresponding to QPSK modulation is 10, and the coding rate *1024 corresponding to pi/2BPSK modulation is 20. Alternatively, the spectral efficiency of the item of MCS number 0 in the first MCS table is 0.0391, the coding rate *1024 corresponding to QPSK modulation is 20, and the coding rate *1024 corresponding to pi/2BPSK modulation is 40. Alternatively, the spectral efficiency of the item of MCS number 0 in the first MCS table is 0.0586, the coding rate *1024 corresponding to QPSK modulation is 30, and the coding rate *1024 corresponding to pi/2BPSK modulation is 60. Alternatively, the spectrum efficiency of the item of MCS number 0 in the first MCS table is 0.0625, the coding rate *1024 corresponding to QPSK modulation is 32, and the coding rate *1024 corresponding to pi/2BPSK modulation is 64. Alternatively, the spectrum efficiency of the item of MCS number 0 in the first MCS table is 0.0313, the coding rate *1024 corresponding to QPSK modulation is 16, and the coding rate *1024 corresponding to pi/2BPSK modulation is 32. Alternatively, the spectrum efficiency of the item of MCS number 0 in the first MCS table is 0.0156, the coding rate *1024 corresponding to QPSK modulation is 8, and the coding rate *1024 corresponding to pi/2BPSK modulation is 16. It should be understood that the above values may also correspond to other MCS numbers. The present application is not limited, that is, the MCS number corresponding to the above spectral efficiency may be greater than or equal to 0 and less than or equal to 31.

In the embodiment of the present application, the number of items included in the first MCS table is the same as the number of items included in the first CQI table, or the number of items included in the first MCS table is less than or equal to 16 and greater than that included in the first CQI table. The number of items.

Optionally, if the item in the first CQI table is 16 items, the number of items in the first MCS table is 16. The number of items in the first CQI table is eight, and the number of items in the first MCS table is eight.

It can be understood that, at this time, 16 items of the first CQI table include 1 out of coverage item index0, and 15 valid items index 1 to index 15. The 16 items in the first MCS table are all 16 valid items. At this time, eight items of the first CQI table include one out of coverage item index0 and seven valid items index 1 to index 7. The 8 items in the first MCS table are all 8 valid items. Further, the number of items of the first MCS table is the same as the number of items of the first CQI table. However, the first MCS table includes a valid item not included in the CQI form. The first MCS table includes but the valid items not included in the first CQI table may be reserved reserved items, that is, the modulation order, the coding rate, and the spectrum efficiency are not included, and the meaning is that the modulation order of the last transmission is used. , coding rate and spectral efficiency. The first MCS table includes but the valid entries not included in the first CQI table may also be MCS index 0, where MCS index 0 is less than the encoding rate and/or spectral efficiency of CQI index 1. In another example, the first MCS table includes: but the valid item not included in the first CQI table is only one item, and the value thereof may pass the MCS index A corresponding to the valid item, where the encoding rate of the MCS index A may be equal to

The coding rate, and/or, the spectral efficiency of MCS index A is equal to the spectral efficiency of (spectral efficiency of MCS index A-1 + spectral efficiency of MCS index A+1)/2. The encoding rate of MCS index A is equal to

The coding rate, and/or, the spectral efficiency of MCS index A is equal to the spectral efficiency of (the spectral efficiency of CQI index A + the spectral efficiency of CQI index A+1)/2. It should be noted that other items in the first MCS table are valid items in the CQI table. Optionally, when A is 1, the MCS index 1 to be added is a low coding rate and low spectral efficiency item, and the URLLC service can improve resource utilization and reliability.

It should be noted that since the spectral efficiency only retains 4 digits after the decimal point, when obtaining the spectral efficiency of the MCS index 1, the calculated result needs to be rounded off to retain the last four digits of the decimal point, for example, the spectrum of the MCS index 1 The efficiency is 1.56444, and the final is 1.5644. For example, the spectral efficiency of MCS index 1 is 1.56445, and finally 1.5645.

Optionally, the number of items in the first CQI table is eight, and the number of items in the first MCS table is 16. Optionally, the number of items in the first CQI table is 4, and the number of items in the first MCS table is 8.

It can be understood that, at this time, 8 items of the first CQI table include 1 out of coverage item index0, and 7 valid items index 1 to index 7. The 16 items in the first MCS table are all 16 valid items, of which 7 items correspond to: CQI index 1 to CQI index 7.

The encoding rate of the four MCS index B is equal to

And/or, the spectral efficiency of MCS index B is equal to

(Spectrum efficiency of MCS index B-1 + spectral efficiency of MCS index B+1) / 2 spectral efficiency.

The encoding rate of the four MCS index C is equal to

or,

The last valid item may be a reserved item, or may be an item obtained according to the index B or index C acquisition manner, or may be obtained by obtaining the MCS index X or the MCS index X+1 according to the communication method shown in FIG. 3 . The items obtained by the method are not limited in the embodiment of the present application.

In the embodiment of the present application, in the number of items included in the first CQI table and/or the first MCS table, the value of the corresponding coding rate multiplied by 1024 includes the following value: 30, and further includes at least one of the following values: 35, 37, 40, 46, 49, 68, 70, 90, 95.

Optionally, the value of the corresponding coding rate in the number of items included in the first CQI table multiplied by 1024 includes the following values: two items are included in the coding rate of 30 to 39, and are included in the coding rate of 40 to 49. It is equal to two items, including two or less in the encoding rate of 60 to 70, and two or less in the encoding rate of 89 to 96. The encoding rates of other ranges are not limited.

Optionally, the value of the corresponding coding rate in the number of items included in the first MCS table multiplied by 1024 includes the following values: three items are included in the coding rate of 30 to 39, and are included in the coding rate of 40 to 49. It is equal to three items, including two or less in the coding rate of 60 to 70, and includes two or less in the coding rate of 89 to 96, and the coding rates of other ranges are not limited.

Optionally, the value of the coding rate multiplied by 1024 in the number of items included in the first CQI table includes the following values: at least one of 35, 37, and 40, and/or at least one of 46 and 49, and / Or at least one of 68 and 70, and/or at least one of 90 and 95.

Optionally, the value of the coding rate multiplied by 1024 in the number of items included in the first CQI table includes the following values: at least one of 30, 35, and 40, and/or at least one of 45 and 50, and / Or at least one of 65 and 70, and/or at least one of 78 and 80, and/or at least one of 90 and 95.

Applying this scheme can improve resource utilization efficiency and transmission reliability at low SNR.

Please refer to Table C5-1, which is an MCS table provided by an embodiment of the present application, where the MCS table is 5 bits, that is, the MCS table includes 32 items:

Table C5-1

Among them, a row in Table C5-1 can be understood as an MCS. It can be seen that one MCS corresponds to one MCS index and a series of parameters. In addition, in the MCS table, the parameters corresponding to one MCS may include other parameters in addition to the parameters shown in Table C5-1, but are not related to the solution of the present application, so they are not listed one by one.

In Table C5-1, the corresponding value for each possibility is the MCS index in the new MCS table, where Old MCS Index indicates the index of the corresponding item in the original MCS table. It can be understood that a plurality of MCS tables can actually be included in Table C5-1. For example, probability 1, modulation order, coding rate, and spectral efficiency, these four columns can form an MCS table, and then, for example, probability 2, modulation order, coding rate, and spectral efficiency, these four columns can form an MCS. The form, ie, each possibility can belong to a separate MCS form. In Table C5-1, the items corresponding to the MCS index that do not have a correspondence with the old MCS index are added.

In the new item in Table C5-1, the correspondence between the MCS index and each parameter is only an example. For example, in the possibility 2, the modulation mode corresponding to the MCS index 6 may not be 2, or the corresponding coding rate is also May not be 90, etc., specifically no restrictions.

Please refer to Table C5-3, which is an MCS table provided by an embodiment of the present application, where the MCS table is 4 bits, that is, the MCS table includes 16 items:

Table C5-3

Among them, the problems similar to those in Table C5-1 are not introduced any more. Refer to the introduction of Table C5-1.

In the new item in Table C5-3, the correspondence between the MCS index and each parameter is only an example. For example, in the possibility 1, the modulation mode corresponding to the MCS index 0 may not be 2, or the corresponding coding rate is also May not be 45, etc., specifically no restrictions.

In the embodiment of the present application, all the items in the first CQI table with the modulation mode being 64QAM are part of the 64QAM in the second CQI table, and the parts of the 64QAM in the second CQI table include:

The CQI numbers corresponding to the partial items are equally spaced; or,

Optionally, the terminal device determines the first CQI table. Further, the terminal device determines a first CQI table from the CQI table set, where the CQI table set includes a first CQI table and a second CQI table. Alternatively, the terminal device determines a first CQI table according to the first message, where the table that can be configured to the terminal device in the first message includes at least a first CQI table and a second CQI table.

Optionally, the network device determines the first CQI table. Further, the network device determines a first CQI table from the CQI table set, where the CQI table set includes a first CQI table and a second CQI table. Alternatively, the network device determines a first CQI table according to the first message, where the first message is a first CQI table or a second CQI table configured by the network device to the terminal device.

It can be understood that the partial item of 64QAM in the second CQI table refers to a part of all the items of 64QAM in the second CQI table.

Optionally, the second form is a C6 form. It can also be other pre-configured forms.

It can be understood that all the items in the first CQI table with a modulation mode of 64QAM are part of the 64QAM in the second CQI table, and all the items in the first CQI table with the modulation mode of 64QAM are all derived from the second CQI. The 64QAM entry in the table. And the item in the first CQI table whose modulation mode is 64QAM is a subset of the items of 64QAM in the second CQI table.

G1: The CQI numbers corresponding to the partial items are equally spaced.

It can be understood that the partial items corresponding to 64QAM include at least three items. Part of the 64QAM in the second CQI table is the CQI number 10, 12, 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 11, 13, and 15 in the second CQI table.

Further, the items of 64QAM in the first CQI table are the CQI numbers 10, 12, 14 in the second CQI table; or the CQI numbers 11, 13, 15 in the second CQI table. This application does not limit the CQI number of these items in the first CQI form. That is, the coding rate (coding rate × 1024) corresponding to the item of 64QAM in the first CQI table, and the spectral efficiency include corresponding values corresponding to the CQI number in the above second CQI table. For example, the CQI number of the item of 64QAM in the first CQI table is XXX3, and if the CQI number 15 in the second CQI table corresponding to XXX3, the coding rate of XXX3 is 948 and the spectrum efficiency is 5.5547.

G2: the partial item includes consecutive N items corresponding to the corresponding CQI number of the 64QAM in the second CQI table, and the first item of the consecutive N items is the modulation mode of the second CQI table is 64QAM The corresponding item with the smallest CQI number, N is a positive integer greater than or equal to 1 and less than or equal to 5.

N=1, the partial items of 64QAM in the second CQI table are CQI numbers 10 and 11 in the second CQI table; or,

N=2, the partial items of 64QAM in the second CQI table are CQI numbers 10 and 11 in the second CQI table; or,

N=3, the partial items of 64QAM in the second CQI table are CQI numbers 10, 11, and 12 in the second CQI table; or,

N=4, the partial items of 64QAM in the second CQI table are CQI numbers 10, 11, 12 and 13 in the second CQI table;

N=5, the partial items of 64QAM in the second CQI table are CQI numbers 10, 11, 12, 13, and 14 in the second CQI table.

Further, the items of 64QAM in the first CQI table are the CQI numbers 10 and 11 in the second CQI table; or the CQI numbers 10, 11 and 12 in the second CQI table; or, the 64QAM in the second CQI table The partial items are CQI numbers 10, 11, 12, and 13 in the second CQI table; or, the partial items of 64QAM in the second CQI table are CQI numbers 10, 11, 12, 13, and 14 in the second CQI table. This application does not limit the CQI number of these items in the first CQI form. That is, the coding rate (coding rate × 1024) corresponding to the item of 64QAM in the first CQI table, and the spectral efficiency include corresponding values corresponding to the CQI number in the above second CQI table. For example, the CQI number of the 64QAM entry in the first CQI table is XXX1 to XXX3. If the CQI numbers in the second CQI table corresponding to XXX1 to XXX3 are 10 to 12, the coding rate of XXX3 is 666 and the spectrum efficiency is 3.9023. For other values, please refer to Table 10, and will not repeat them.

G3: The CQI number corresponding to the partial item is discontinuous, and at least one item other than the item having the largest CQI number corresponding to all the items in the second CQI table whose modulation mode is 64QAM.

The partial items of 64QAM in the second CQI table are CQI numbers 10 and 12 in the second CQI table; or CQI numbers 10 and 13 in the second CQI table; or CQI numbers 10 and 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 11 and 13 in the second CQI table; or, CQI numbers 11 and 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 12 and 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 10, 11 and 13 in the second CQI table; or, the partial items of 64QAM in the second CQI table are CQI numbers 10, 11 and 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 10, 12 and 13 in the second CQI table; or, the partial items of 64QAM in the second CQI table are CQI numbers 10, 12 and 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 10, 13, and 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 11, 12, and 14 in the second CQI table; or,

The partial items of 64QAM in the second CQI table are CQI numbers 10, 11, 12, and 14 in the second CQI table; or, the partial items of 64QAM in the second CQI table are CQI numbers 10, 12 in the second CQI table, 13 and 14; or, the partial items of 64QAM in the second CQI table are CQI numbers 10, 11, 13, and 14 in the second CQI table; or, the partial items of 64QAM in the second CQI table are in the second CQI table. CQI numbers 10, 11, 12 and 14.

Further, the items of 64QAM in the first CQI table are CQI numbers 10, 12, 13, and 14 in the second CQI table, and so on. This application does not limit the CQI number of these items in the first CQI form. That is, the coding rate (coding rate × 1024) corresponding to the item of 64QAM in the first CQI table, and the spectral efficiency include corresponding values corresponding to the CQI number in the above second CQI table. For example, the CQI number of the 64QAM entry in the first CQI table is XXX1 to XXX3. If the CQI numbers 10, 12, 13, and 14 in the second CQI table corresponding to XXX1 to XXX4, the coding rate of XXX4 is 873, and the spectrum efficiency is 5.1152. For other values, please refer to Table 10, and will not repeat them.

G4: The partial item includes an item having the largest CQI number corresponding to all items in the second CQI table whose modulation mode is 64QAM.

It can be understood that the partial item of 64QAM in the second CQI table includes at least the item with the largest CQI number corresponding to all the items in the second CQI table whose modulation mode is 64QAM. That is, at least the item of the CQI number 15 in the second CQI table is included.

That is, the first CQI table includes at least the item of the CQI number 15 in the second CQI table. It can be understood that some items of 64QAM in the second CQI table may also include two, or three, or four of the numbers 10-14. But does not include all 10-14 items.

G5: The CQI numbers corresponding to the partial items are consecutive, and at least one item other than the item having the largest CQI number corresponding to all the items in the second CQI table whose modulation mode is 64QAM.

For ease of understanding, the first CQI table included in the following Table 2 (ie, the second CQI table) includes an item whose modulation mode is 64QAM. For example, the item including the modulation mode of 64QAM may be one item or multiple. item.

All items in the first CQI table with a modulation mode of 64QAM are part of 64QAM in the second CQI table, and part of the 64QAM in the second CQI table includes:

In this embodiment of the present application, each item in the first MCS table corresponds to a modulation mode, a coding rate, and a spectrum efficiency; or

The modulation method of the item with the largest MCS number in the first MCS table is QPSK, and the coding rate and the spectrum efficiency are reserved; or

The modulation mode of the item with the largest MCS number in the first MCS table is 16QAM, the coding rate and the spectrum efficiency are reserved, and the modulation mode of the item with the largest MCS number in the first MCS table is QPSK. The coding rate and spectral efficiency are reserved; or,

The modulation method of the item with the largest number in the first MCS table is 64QAM, the coding rate and the spectrum efficiency are reserved, and the modulation mode of the item with the largest MCS number in the first MCS table is QPSK, and the coding is performed. Rate and spectral efficiency are reserved; or,.

The modulation mode, coding rate, and spectral efficiency of the item of at least one of the first MCS tables are reserved.

Specifically, the first CQI table includes CQI numbers 0 to 15, and the CQI number in the second CQI table also includes 0 to 15.

Optionally, the modulation mode, the coding rate, and the spectrum efficiency of the item of the at least one of the first MCS tables are reserved. Exemplarily, the item number of the corresponding reserved in the first MCS table may be MCS number 0, or the last MCS number.

It can be understood that the modulation mode, coding rate and spectral efficiency corresponding to the MCS number notified in an MCS table are reserved. It can be understood that the modulation mode, the coding rate, and the spectrum efficiency of the current transmission of the HARQ process number are the modulation modes, coding rates, and spectrum efficiencies of the effective MCS corresponding to the transmission of the latest HARQ process number. This is because transmissions corresponding to different HARQ process numbers are considered to be different transmissions. Optionally, the modulation mode, the coding rate, and the spectrum efficiency of the current transmission of the HARQ process ID are the modulation mode, the coding rate, and the spectrum efficiency of the valid MCS corresponding to the transmission that does not correspond to the HARQ process number. In this case, when the network device notifies the MCS that the HARQ process ID is not specified, the notified MCS can correspond to the MCS of any one of the HARQ processes.

Optionally, the modulation mode, coding rate, and spectral efficiency corresponding to the MCS number used for retransmission are reserved. The modulation mode, coding rate, and spectral efficiency used for retransmission are the modulation modes, coding rates, and spectral efficiencies corresponding to the MCS numbers used for the initial transmission. The advantage of this is that the retransmitted transport block is the same as the original transmitted transport block, so that the retransmitted allocated time-frequency domain resources no longer determines the size of the transport block, and the network device can allocate more time-frequency domain resources for Transfer the retransmitted transport block. On the contrary, when the MCS number used for retransmission corresponds to the modulation mode, the coding rate, and the spectrum efficiency is not reserved, the indicated time-frequency domain resources may affect the terminal device to determine the transport block size, and then the network device indicates the same as the initial transmission block. The transport block, so the indicated time-frequency domain resources will receive a limit, which is not conducive to the high reliability requirements of URLLC.

For example, as shown in Figure 4-1, the 0th transmission scheduled by the network device is the initial transmission, the corresponding MCS is the non-reserved value, and the scheduled first transmission is a retransmission, and the corresponding MCS is the reserved value. Then, the value of the MCS corresponding to the 0th transmission can be used for the first transmission, specifically, the modulation scheme, the coding rate, the spectral efficiency, and the like corresponding to the 0th transmission. Or, as shown in Figure 4-2, the 0th transmission scheduled by the network device is the initial transmission, and the corresponding MCS is the non-reserved value. The scheduled 1st transmission and the 2nd transmission are retransmissions, and the corresponding MCS. All of them are reserved values. For example, the value of the MCS corresponding to the 0th transmission is used for the second transmission, specifically, the modulation scheme, the coding rate, and the spectral efficiency corresponding to the 0th transmission.

In the embodiment of the present application, the first MCS table is determined according to the first MCS offset value and the second MCS table, or the coding rate corresponding to the at least one MCS number in the first MCS table is according to the first The MCS offset value is determined by the second MCS table. The first MCS offset value is sent by the network device.

Optionally, the number of items in the second MCS table is greater than or equal to the number of items in the first MCS table. The item included in the first MCS table is a subset of the items included in the second MCS table.

Optionally, the first MCS offset value may be configured for a time-frequency domain resource. The frequency domain resource may be a carrier CC, or a partial carrier bandwidth BWP, or a serving cell, or one or more resource blocks RB. The time domain resource can be one or more symbols, or one or more time slots.

Optionally, the first MCS offset value may be configured for the BLER. For example, the first MCS offset value is AA1 for the configuration of 10e-5, the first MCS offset value is AA2 for the configuration of 10e-4, and the first MCS offset value is AA3 for the configuration of 10e-3, for 10e- The configuration of the first MCS offset value of 2 is AA4.

Optionally, the first MCS offset value may be configured for the first MCS table. For example, the first MCS offset value for the configuration of the first MCS table is AA5, and the first MCS offset value for the third MCS table is AA6.

It can be understood that the first MCS offset value is sent by the network device through high layer signaling. The terminal device receives the first MCS offset value by using the high layer signaling sent by the network device.

Optionally, the first MCS offset value may determine a modulation mode, a coding rate, and a spectral efficiency corresponding to one or more MCS numbers BB1. BB1 is a positive integer greater than or equal to zero. For example, the modulation mode, coding rate, and spectral efficiency corresponding to MCS number 0 to MCS number 4 are determined according to the first MCS offset value.

Optionally, the first CQI table is determined according to the first CQI offset value and the second CQI table, or the coding rate corresponding to the at least one CQI number in the first CQI table is according to the first CQI offset. The value is determined by the second CQI form.

Optionally, the number of items in the second CQI table is greater than or equal to the number of items in the first CQI table. The item included in the first CQI table is a subset of the items included in the second CQI table.

Optionally, the first CQI offset value may be configured for a time-frequency domain resource. The frequency domain resource may be a carrier CC, or a partial carrier bandwidth BWP, or a serving cell, or one or more resource blocks RB. The time domain resource can be one or more symbols, or one or more time slots.

Optionally, the first CQI offset value may be configured for the BLER. For example, the first CQI offset value is AA7 for the configuration of 10e-5, the first CQI offset value is AA8 for the configuration of 10e-4, and the first CQI offset value is AA9 for the configuration of 10e-3, for 10e- The configuration of the first CQI offset value of 2 is AA10.

Optionally, the first CQI offset value may be configured for the first CQI table. For example, the first CQI offset value for the configuration of the first CQI table is AA11, and the first CQI offset value for the third CQI table is AA12.

It can be understood that the first CQI offset value is sent by the network device through high layer signaling. The terminal device receives the first CQI offset value by using the high layer signaling sent by the network device. The high layer signaling may refer to signaling sent by a higher layer protocol layer, and the high layer protocol layer is at least one protocol layer in each protocol layer above the physical layer. The upper layer protocol layer may specifically be at least one of the following protocol layers: a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (Packet Data Convergence). Protocol, PDCP) layer, Radio Resource Control (RRC) layer and Non Access Stratum (NAS).

Optionally, the first CQI offset value may determine a modulation mode, a coding rate, and a spectral efficiency corresponding to one or more CQI numbers BB2 in the first CQI table. BB2 is a positive integer greater than or equal to 1. For example, the modulation mode, coding rate, and spectral efficiency corresponding to CQI number 1 to CQI number 15 are determined according to the first CQI offset value.

Optionally, the modulation mode, the coding rate, and the spectral efficiency corresponding to the CQI number of the 16QAM, and/or QPSK, and/or BSPK in the first CQI table are determined according to the first CQI offset value. For example, the modulation mode, the coding rate, and the spectral efficiency corresponding to the CQI number 1 and the CQI number 2 of the modulation scheme BSPK are determined according to the first CQI offset value. For example, the modulation mode, the coding rate, and the spectral efficiency corresponding to the CQI number 0 and the CQI number 9 of the modulation scheme QPSK are determined according to the first CQI offset value. Please refer to Table C13, which is an example of determining a first CQI table according to the second CQI table and the first CQI offset value:

Table C13

In Table C13, the first CQI number indicates the CQI index in the first CQI table, and the second CQI number indicates the CQI index in the second CQI table.

In Table C13, the correspondence between the CQI index and each parameter is only an example, for example, the first CQI number 15 and the second CQI number 17, and the corresponding modulation mode may not be 64QAM, or the corresponding coding rate × 1024 value. It may not be 666, etc., and is not limited.

It should be noted that the first CQI table and/or the second CQI table provided by the embodiment of the present application may include corresponding at least one item shown in the table C13, and may also include possible ones not shown in the table C13. Other items, as long as the rules for determining the first CQI table according to the second CQI table in accordance with the embodiments of the present application are included in the protection scope of the embodiments of the present application. The table C13 can also be tailored. For example, one or more of the tables C13 may also constitute one or more new tables C13, which are also within the protection scope of the embodiments of the present application.

It should be noted that the MCS table provided by the embodiment of the present application may include Tables A1, A2, A8, A9, A9-1, A13, A32-1, A36, A42, 46, 49, 50, 50-1. At least one of C2, C5-1, or C5-3 may further include Tables A1, A2, A8, A9, A9-1, A13, A32-1, A36, A42, 46, 49, 50, The possible other items not shown in the 50-1, C2, C5-1, or C5-3 are included in the protection scope of the embodiment of the present application as long as they conform to the rules of the MCS table of the embodiment of the present application. Among them, Tables A1, A2, A8, A9, A9-1, A13, A32-1, A36, A42, 46, 49, 50, 50-1, C2, C5-1, or C5-3 can also be cut to form new A table, such as one or more of the tables A1, may also constitute one or more new tables A1, respectively, and one or more of the tables A2 may also constitute one or more new tables A2, respectively, and the remaining tables are similar. Therefore, the new table formed after the cutting is also within the protection scope of the embodiment of the present application.

Referring to FIG. 5, an embodiment of the present application provides a third communication method, which is also referred to as a CQI receiving and notifying method. In the following description, the application scenario shown in FIG. 2 is applied as an example. The flow of this method is described below.

S51. The terminal device learns the first CQI number according to the first CQI table.

S52. The terminal device sends the first CQI number, and the network device receives the first CQI number.

S53. The network device determines a modulation mode, a coding rate, and a spectrum efficiency corresponding to the first CQI number. The first CQI table includes: an item not included in the second CQI table, and/or a part of the second CQI table whose modulation mode is 64QAM.

The items in the first CQI table are 64QAM, and all the items in the second CQI table are 64QAM. The 64QAM parts in the second CQI table include:

The CQI numbers corresponding to the partial items are equally spaced; or,

The CQI number corresponding to the partial item is discontinuous, and at least one item other than the item having the largest CQI number corresponding to all the items of the 64QAM modulation mode in the second CQI table; or

The CQI numbers corresponding to the partial items are consecutive, and at least one item other than the item having the largest CQI number corresponding to all the items of the 64QAM modulation mode in the second CQI table; or

The partial item includes consecutive N items corresponding to the CQI number of the 64QAM in the second CQI table, and the first item of the consecutive N items is the corresponding CQI of the second CQI table with a modulation mode of 64QAM. The item with the lowest number, N is a positive integer greater than or equal to 1 and less than or equal to 5.

The number of the partial items in the second CQI table whose modulation mode is 64QAM is CQI number 10, CQI number 11, CQI number 12, CQI number 13 and CQI number 15 in the second CQI table, or CQI number 10, CQI number 11 , CQI number 14 and CQI number 15, or CQI number 11, CQI number 12, CQI number 13, CQI number 14 and CQI number 15, or CQI number 10, CQI number 11, CQI number 12, CQI number 14 and CQI No. 15; or,

The parts of the second CQI table whose modulation scheme is 64QAM are numbered CQI number 10, CQI number 11, CQI number 12, CQI number 13, and CQI number 14, or CQI number 10, CQI number 11, CQI number 12, and CQI. No. 13, or, CQI number 10, CQI number 11 and CQI number 12, or CQI number 10 and CQI number 11.

Or, all the items in the first CQI table with the modulation mode being 64QAM are part of the 64QAM in the second CQI table, and the parts of the 64QAM in the second CQI table include:

For the first CQI table and the second CQI table, the difference is similar to the difference between the table C1 and the table C2 and the table C6, so regarding the related description of the embodiment shown in FIG. 5, reference may be made to the embodiment shown in FIG.

The device provided in the embodiment of the present application is described below with reference to the accompanying drawings.

FIG. 6 shows a schematic structural diagram of a communication device 600 that can implement the functions of the network device referred to above. The communication device 600 may be the network device described above or may be a chip disposed in the network device described above. The communication device 600 can include a processor 601 and a transceiver 602. The processor 601 can be used to perform S31 in the embodiment shown in FIG. 3, and/or S53 in the embodiment shown in FIG. 5, and/or other processes for supporting the techniques described herein. The transceiver 602 can be used to perform S32 and S35 in the embodiment shown in FIG. 3, and/or S41 and S42 in the embodiment shown in FIG. 4, and/or S52 in the embodiment shown in FIG. And/or other processes for supporting the techniques described herein.

For example, the processor 601 is configured to determine N MCS indexes in the MCS table, where the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by 1024 is less than or equal to a first threshold, where X is greater than or equal to 0. Integer, N is a positive integer, N=>X;

The transceiver 602 is configured to send at least one of the N MCS indexes.

All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

FIG. 7 shows a schematic structural diagram of a communication device 700 that can implement the functions of the terminal device referred to above. The communication device 700 may be the terminal device described above, or may be a chip disposed in the terminal device described above. The communication device 500 can include a processor 701 and a transceiver 702. Wherein, the processor 701 can be used to perform S33 and S34 in the embodiment shown in FIG. 3, and/or S51 in the embodiment shown in FIG. 5, and/or other processes for supporting the techniques described herein. . The transceiver 702 can be used to perform S32 and S35 in the embodiment shown in FIG. 3, and/or S41 and S42 in the embodiment shown in FIG. 4, and/or S52 in the embodiment shown in FIG. And/or other processes for supporting the techniques described herein.

For example, the transceiver 702 is configured to receive downlink control information.

The processor 701 is configured to obtain, from the downlink control information, at least one MCS index in the MCS table, where the MCS table includes N MCS indexes, and the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by 1024 is less than or equal to the first threshold, where X is an integer greater than or equal to 0, N is a positive integer, and N=>X.

In a simple embodiment, those skilled in the art will appreciate that communication device 600 or communication device 700 can also be implemented by the structure of communication device 800 as shown in FIG. 8A. The communication device 800 can implement the functions of the network device or terminal device referred to above. The communication device 800 can include a processor 801. Wherein, when the communication device 800 is used to implement the functions of the terminal device in the embodiment shown in FIG. 3, the processor 801 can be used to execute S33 and S34 in the embodiment shown in FIG. 3, and/or for Other processes that support the techniques described herein. When the communication device 800 is used to implement the functions of the network device in the embodiment shown in FIG. 3, the processor 801 can be used to perform S31 in the embodiment shown in FIG. 3, and/or to support the description herein. Other processes of technology. When the communication device 800 is used to implement the functions of the terminal device in the embodiment shown in FIG. 5, the processor 801 may be configured to perform S51 in the embodiment shown in FIG. 5, and/or to support the description herein. Other processes of technology. When the communication device 800 is used to implement the functions of the network device in the embodiment shown in FIG. 5, the processor 801 may be configured to perform S53 in the embodiment shown in FIG. 5, and/or to support the description herein. Other processes of technology.

The communication device 800 can pass through a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor (central processor). Unit, CPU), network processor (NP), digital signal processor (DSP), microcontroller (micro controller unit (MCU), or programmable logic device (programmable logic device, The PLD) or other integrated chip implementation, the communication device 800 can be disposed in the network device or the communication device of the embodiment of the present application, so that the network device or the communication device implements the method for transmitting a message provided by the embodiment of the present application.

In an alternative implementation, the communication device 800 can include a transceiver component for communicating with a network device. For example, when the communication device 800 is used to implement the functions of the network device or the terminal device in the embodiment shown in FIG. 3, the transceiver component may be used to execute S32 and S35 in the embodiment shown in FIG. 3, and/or Other processes for supporting the techniques described herein. When the communication device 800 is used to implement the functions of the network device or the terminal device in the embodiment shown in FIG. 4, the transceiver component may be used to execute S41 and S42 in the embodiment shown in FIG. 3, and/or for Other processes that support the techniques described herein. When the communication device 800 is used to implement the functions of the network device or the terminal device in the embodiment shown in FIG. 5, the transceiver component may be used to execute S52 in the embodiment shown in FIG. 5, and/or to support the document. Other processes of the described techniques.

In an alternative implementation, the communication device 800 can also include a memory 802, which can be referenced to FIG. 8B, where the memory 802 is used to store computer programs or instructions, and the processor 801 is used to decode and execute the computer programs or instructions. . It should be understood that these computer programs or instructions may include the functional programs of the network devices or terminal devices described above. When the function program of the network device is decoded and executed by the processor 801, the network device can be implemented by the embodiment shown in FIG. 3, the embodiment shown in FIG. 4, or the embodiment shown in FIG. The method of the network device. When the function program of the terminal device is decoded and executed by the processor 801, the terminal device can be implemented in the embodiment shown in FIG. 3, the embodiment shown in FIG. 4 or the embodiment shown in FIG. 5 in the embodiment of the present application. The functionality of the terminal device in the provided method.

In another alternative implementation, the functional programs of these network devices or terminal devices are stored in a memory external to the communication device 800. When the function program of the network device is decoded and executed by the processor 801, part or all of the contents of the function program of the network device are temporarily stored in the memory 802. When the function program of the terminal device is decoded and executed by the processor 801, part or all of the contents of the function program of the terminal device are temporarily stored in the memory 802.

In another alternative implementation, the functional programs of these network devices or terminal devices are disposed in a memory 802 stored within communication device 800. When the function program of the network device is stored in the memory 802 inside the communication device 800, the communication device 800 can be disposed in the network device of the embodiment of the present application. When the function program of the terminal device is stored in the memory 802 inside the communication device 800, the communication device 800 can be disposed in the terminal device of the embodiment of the present application.

In yet another alternative implementation, portions of the functional programs of the network devices are stored in a memory external to the communication device 800, and other portions of the functional programs of the network devices are stored in the memory 802 internal to the communication device 800. Alternatively, part of the contents of the functional programs of the terminal devices are stored in a memory external to the communication device 800, and other portions of the functional programs of the terminal devices are stored in the memory 802 inside the communication device 800.

In the embodiment of the present application, the communication device 600, the communication device 700, and the communication device 800 are presented in the form of dividing each functional module into functions, or may be presented in an integrated manner to divide the functional modules. A "module" herein may refer to an ASIC, a processor and memory that executes one or more software or firmware programs, integrated logic circuitry, and/or other devices that provide the functionality described above.

In addition, the communication device 600 provided by the embodiment shown in FIG. 6 can also be implemented in other forms. For example, the communication device includes a processing module, and optionally, a transceiver module. For example, the processing module can be implemented by the processor 601, and the transceiver module can be implemented by the transceiver 602. Wherein, the processing module can be used to perform S31 in the embodiment shown in FIG. 3, and/or S53 in the embodiment shown in FIG. 5, and/or other processes for supporting the techniques described herein. The transceiver module can be used to perform S32 and S35 in the embodiment shown in FIG. 3, and/or S41 and S42 in the embodiment shown in FIG. 4, and/or S52 in the embodiment shown in FIG. 5, and / or other processes used to support the techniques described herein.

For example, the processing module is configured to determine N MCS indexes in the MCS table, and the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by 1024 by less than or equal to a first threshold, where X is an integer greater than or equal to 0. , N is a positive integer, N=>X;

And a transceiver module, configured to send at least one of the N MCS indexes.

The communication device 700 provided by the embodiment shown in FIG. 7 can also be implemented in other forms. For example, the communication device includes a processing module, and optionally, a transceiver module. For example, the processing module can be implemented by the processor 701, and the transceiver module can be implemented by the transceiver 702. Wherein, the processing module can be used to perform S33 and S34 in the embodiment shown in FIG. 3, and/or S51 in the embodiment shown in FIG. 5, and/or other processes for supporting the techniques described herein. The transceiver module can be used to perform S32 and S35 in the embodiment shown in FIG. 3, and/or S41 and S42 in the embodiment shown in FIG. 4, and/or S52 in the embodiment shown in FIG. 5, and / or other processes used to support the techniques described herein.

For example, a transceiver module is configured to receive downlink control information;

a processing module, configured to acquire, from the downlink control information, at least one MCS index in an MCS table, where the MCS table includes N MCS indexes, and an encoding rate corresponding to an MCS index X in the N MCS indexes is multiplied by 1024. Less than or equal to the first threshold, where X is an integer greater than or equal to 0, N is a positive integer, and N=>X.

The

communication device

600, 700 and the communication device 800 provided by the embodiments of the present application can be used to perform the method provided in the embodiment shown in FIG. 3, the embodiment shown in FIG. 4, or the embodiment shown in FIG. For the technical effects that can be obtained, reference may be made to the foregoing method embodiments, and details are not described herein again.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

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 application 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 readable storage medium, for example, the computer instructions can be passed from a website site, computer, server or data center Wired (eg, coaxial cable, fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. 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 digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD) ))Wait.

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A communication method, comprising:

Determining N MCS indexes in a modulation and coding mode MCS table, where a coding rate corresponding to an MCS index X in the N MCS indexes is multiplied by a value of 1024 is less than or equal to a first threshold, where X is an integer greater than or equal to 0, N is a positive integer, N is greater than or equal to X;

Sending at least one MCS index of the N MCS indexes.
A communication method, comprising:

Receiving downlink control information;

Acquiring at least one MCS index in the modulation and coding mode MCS table according to the downlink control information,

The MCS table includes N MCS indexes, and the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by a value of 1024 that is less than or equal to a first threshold, where X is an integer greater than or equal to 0, and N is positive An integer, N is greater than or equal to X.
The method according to claim 1 or 2, wherein the first threshold is 119, and the coding rate corresponding to the MCS index X multiplied by a value of 1024 includes the following values: 30, 40, 50, 64, 78 And 99, wherein the modulation mode corresponding to the MCS index X is QPSK, and the modulation order is 2.
The method according to claim 1 or 2, wherein the first threshold is 119, and the value of the coding rate corresponding to the MCS index X multiplied by 1024 includes the following values: 60, 80, and 100, wherein The modulation mode corresponding to the MCS index X is BPSK, and the modulation order is 1.
The method according to any one of claims 1 to 4, wherein the first MCS table includes items remaining after the items corresponding to the six MCS indexes in the second MCS table are removed.
The method according to any one of claims 1 to 5, wherein the first MCS table includes an item with an MCS index of 0, an item with an MCS index of 1, an item with an MCS index of 2, and an MCS index of The item of 3, the item with MCS index of 4 and the item with MCS index of 5 are items not included in the second MCS table.
The method according to any one of claims 1 to 4, wherein the first MCS table does not include an MCS index of 25 in the second MCS table, an MCS index of 26, an MCS index of 27, and an MCS index of 28 corresponding items.
The method according to claim 5, wherein the items corresponding to the six MCS indexes in the removed second MCS table include an MCS index of 25, an MCS index of 26, an MCS index of 27, and an MCS index of 28. Item.
The method according to any one of claims 1 to 8, wherein each item in the first MCS table corresponds to one MCS index, and each MCS index in a part of the MCS indexes in the first MCS table Corresponding to a modulation order, a coding rate multiplied by a value of 1024, and a spectral efficiency, wherein

The order of the MCS index of 6 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 120, and the spectral efficiency is 0.2344;

The order of the MCS index of 7 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 157, and the spectral efficiency is 0.3066;

The order of the MCS index of 8 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 193, and the spectral efficiency is 0.3770;

The order of the MCS index of 9 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 251, and the spectral efficiency is 0.4902;

The order of the MCS index of 10 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 308, and the spectral efficiency is 0.6016;

The order of the MCS index of 11 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 379, and the spectral efficiency is 0.7402;

The order of the MCS index of 12 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 449, and the spectral efficiency is 0.8770;

The order of the MCS index of 13 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 526, and the spectral efficiency is 1.0273;

The item with the MCS index of 14 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 602, and the spectral efficiency is 1.1758.
The method according to claim 9, wherein the first MCS table further comprises:

The item coding rate of the MCS index is 4, and the value of the value of 1024 is multiplied by 78, and the coding rate multiplied by the value of 1024 is 78, the modulation order is 2, and the spectral efficiency is 01523;

The MCS index is an item coding rate of 5 multiplied by a value of 1024, and the value of the coding rate multiplied by 1024 is a modulation order of 2 and a spectral efficiency of 01934.
The method according to claim 9, wherein the first MCS table further includes an item with an MCS index of 4, wherein

The coding rate corresponding to the item with the MCS index of 4 is multiplied by the value of 1024 by 78, the modulation order is 2, and the spectral efficiency is 01523; or

The coding rate corresponding to the item whose MCS index is 4 is multiplied by 1024, the value is 156, the modulation order is 1, and the spectral efficiency is 01523.
The method according to any one of claims 1 to 11, wherein the first MCS table further includes an item with an MCS index of 0, and the item with the MCS index of 0 corresponds to a spectral efficiency of 0.0586, wherein ,

The modulation order is 2, and the coding rate multiplied by 1024 is 30, or,

The modulation order is 1, and the coding rate multiplied by 1024 is 60.
The method according to any one of claims 1 to 8, wherein the first MCS table further includes an item with an MCS index of 1, and the item with the MCS index of 1 corresponds to a spectral efficiency of 0.0781, wherein ,

The modulation order is 2, and the coding rate is multiplied by 1024 to be 40, or,

The modulation order is 1, and the coding rate multiplied by 1024 is 80.
The method according to any one of claims 1 to 8, wherein the first MCS table further includes:

The coding rate is multiplied by an item having a value of 1024 of 50, and the coding rate multiplied by a value of 1024 is 50, and the modulation order is 2, and the spectral efficiency is 0.0977;

The coding rate is multiplied by a value of 1024 with a value of 64. The coding rate multiplied by a value of 1024 has an modulation order of 2 and a spectral efficiency of 0.125.
The method according to any one of claims 1 to 8, wherein the first MCS table further includes:

The coding rate is multiplied by a value of 1024, the value of the coding rate multiplied by 1024 is 100, the modulation order is 1 and the spectral efficiency is 0.0977;

The coding rate is multiplied by the value of 1024, which is 128. The coding rate multiplied by the value of 1024 is 128, the modulation order is 1 and the spectral efficiency is 0.125.
The method according to any one of claims 1 to 11, wherein the spectrum efficiency corresponding to the item with the MCS index of 1 in the first MCS table is equal to (the item corresponding to the CQI number 1 in the first CQI table corresponds to The spectral efficiency + the spectral efficiency corresponding to the item with the CQI number 2 in the first CQI table is divided by 2.
The method according to any one of claims 1 to 11, characterized in that the spectral efficiency corresponding to the item with the MCS number of 3 in the first MCS table is equal to (the item corresponding to the CQI number 2 in the first CQI table corresponds to The spectral efficiency + the spectral efficiency corresponding to the term CQI number 3 in the first CQI table is divided by 2.
The method according to claim 16 or 17, wherein all the items of the 64-phase quadrature amplitude modulation QAM in the first CQI table are part of 64QAM in the second CQI table, wherein Some of the 64QAM entries in the second CQI table are:

The CQI number in the second CQI table is 10, the CQI number is 11, the CQI number is 12, and the CQI number is 13.
The method of claim 5, 7 or 8, wherein said second MCS table is:
The method of claim 18 wherein said second CQI table is:
A method for receiving a modulation and coding mode MCS, comprising:

The communication device sends a first channel quality indicator CQI number, where the first CQI number is determined according to the first CQI table;

The communication device receives an MCS number in a first MCS table, the first MCS table includes an item not included in the first CQI table, and a modulation mode in the first CQI table is 64-phase At least one term of the amplitude modulation QAM.
A method for notifying a modulation and coding mode MCS, comprising:

The communication device receives the first channel quality indicator CQI number in the first CQI table;

Transmitting, by the communication device, a first MCS number, where the first MCS number is determined according to a first MCS table, where the first MCS table includes an item not included in the first CQI table, and the first The modulation scheme in the CQI table is at least one term of 64-phase quadrature amplitude modulation QAM.
The method according to claim 21 or 22, wherein the first MCS table includes all items except the item having the smallest CQI number in the first CQI table.
The method according to any one of claims 21 to 23, wherein the MCS number of the item not included in the first CQI table in the first MCS table is one of the following:

MCS number 0, MCS number 1, and MCS number 3.
The method according to any one of claims 21 to 24, wherein the spectral efficiency of the item of MCS number 0 in the first MCS table is smaller than the spectral efficiency of the item of CQI number 1 in the first CQI table.
The method according to any one of claims 21 to 25, wherein all the items of the 64-phase quadrature amplitude modulation QAM in the first CQI table are part of 64QAM in the second CQI table, Some of the 64QAM entries in the second CQI table are:

The CQI numbers corresponding to the partial items are consecutive, and at least one item other than the item having the largest CQI number corresponding to all the items in the second CQI table whose modulation mode is 64QAM; or

The partial item includes consecutive N items corresponding to the CQI number of the 64QAM in the second CQI table, and the first item of the consecutive N items is the corresponding modulation mode of the second CQI table is 64QAM. The smallest item of the CQI number, N is a positive integer greater than or equal to 1 and less than or equal to 5.
The method according to claim 26, wherein all items in the first CQI table with a modulation mode of 64QAM are part of 64QAM in the second CQI table, wherein 64QAM of the second CQI table The partial term is an item in the second CQI table with a CQI number of 10, a CQI number of 11, a CQI number of 12, and a CQI number of 13.
The method according to any one of claims 21-27, wherein each of the first CQI tables corresponds to one CQI number, and each of the partial CQI numbers in the first CQI table is CQI The number corresponds to a modulation mode, a coding rate, and a spectral efficiency;

The modulation mode corresponding to the item with the CQI number of 3 is QPSK, the coding rate multiplied by 1024 is 78, and the spectrum efficiency is 0.1523;

The modulation method corresponding to the item with CQI number 4 is QPSK, the coding rate multiplied by 1024 is 120, and the spectral efficiency is 0.2344;

The modulation method corresponding to the item with the CQI number of 5 is QPSK, the coding rate multiplied by 1024 is 193, and the spectral efficiency is 0.3770;

The modulation method corresponding to the item with CQI number 6 is QPSK, the coding rate multiplied by 1024 is 308, and the spectral efficiency is 0.6016.

The modulation method corresponding to the item with CQI number 7 is QPSK, the coding rate multiplied by 1024 is 449, and the spectral efficiency is 0.8770;

The modulation method corresponding to the item with the CQI number of 8 is QPSK, the coding rate multiplied by 1024 is 602, and the spectrum efficiency is 1.1758;

The modulation method corresponding to the item with the CQI number of 9 is 16QAM, the coding rate multiplied by 1024 is 378, and the spectral efficiency is 1.4766.

The modulation method corresponding to the item with the CQI number of 10 is 16QAM, the coding rate multiplied by 1024 is 490, and the spectral efficiency is 1.9141;

The modulation method corresponding to the item with the CQI number of 11 is 16QAM, the coding rate multiplied by 1024 is 616, and the spectral efficiency is 2.4063.
The method according to any one of claims 21-28, characterized in that the value of the coding rate multiplied by 1024 in the first CQI table comprises the following values: 30 and 50.
The method according to claim 29, wherein the value of the coding rate multiplied by 1024 in the first CQI table further comprises the following values: 78, 120, 193, 308, 449, 602, 378, 490, 616, 466, 567, 666, and 772.
The method according to claim 30, wherein the encoding rate multiplied by a value of 1024 corresponds to a coding rate and a spectral efficiency in an item in the first CQI table, including:

The coding rate multiplied by 1024 is 30. The modulation scheme is QPSK, and the spectral efficiency is 0.0586.

The coding rate multiplied by 1024 is 50. The modulation scheme is QPSK, and the spectral efficiency is 0.0977.

The coding rate multiplied by 1024 is 78. The modulation scheme is QPSK, and the spectral efficiency is 0.1523.

The coding rate multiplied by 1024 is 120, the modulation mode is QPSK, and the spectral efficiency is 0.2344.

The coding rate multiplied by 1024 is 193. The modulation scheme is QPSK, and the spectral efficiency is 0.3770.

The coding rate multiplied by 1024 is 308, the modulation mode is QPSK, and the spectral efficiency is 0.6016.

The coding rate multiplied by 1024 is 449. The modulation scheme is QPSK, and the spectral efficiency is 0.8770.

The coding rate multiplied by 1024 is 602. The modulation scheme corresponding to 602 is QPSK, and the spectral efficiency is 1.1758.

The coding rate multiplied by 1024 is 378, the modulation mode is 16QAM, and the spectral efficiency is 1.4766.

The coding rate multiplied by 1024 is 490, the modulation mode is 16QAM, and the spectral efficiency is 1.9141.

The coding rate multiplied by 1024 is 616, the modulation mode is 16QAM, and the spectral efficiency is 2.4063.

The coding rate multiplied by 1024 is 466, the modulation mode is 64QAM, and the spectral efficiency is 2.7305.

The coding rate multiplied by 1024 is 567, the modulation mode is 64QAM, and the spectral efficiency is 3.3223.

The coding rate multiplied by 1024 is 666, the modulation mode is 64QAM, and the spectral efficiency is 3.9023.

The coding rate multiplied by 1024 is 772. The modulation scheme is 64QAM and the spectral efficiency is 4.5234.
The method according to any one of claims 21 to 31, wherein a coding rate corresponding to an MCS index X in the N MCS indexes in the first MCS table multiplied by a value of 1024 is less than or equal to a first threshold. Where X is an integer greater than or equal to 0, N is a positive integer, and N is greater than or equal to X.
The method according to claim 32, wherein the first threshold is 119, and the value of the coding rate corresponding to the MCS index X multiplied by 1024 includes the following values: 30, 40, 50, 64, 78, and 99. The modulation mode corresponding to the MCS index X is QPSK, and the modulation order is 2.
The method according to claim 32, wherein the first threshold is 119, and a value corresponding to a coding rate of the MCS index X multiplied by 1024 includes the following values: 60, 80, and 100, wherein the The modulation mode corresponding to the MCS index X is BPSK, and the modulation order is 1.
A method according to any one of claims 21 to 25, 27, wherein

Each item in the first MCS table corresponds to a modulation mode, a coding rate, and a spectral efficiency; or

The modulation method of the item with the largest MCS number in the first MCS table is QPSK, and the coding rate and the spectrum efficiency are reserved; or

The modulation mode of the item with the largest MCS number in the first MCS table is 16QAM, the coding rate and the spectrum efficiency are reserved, and the modulation mode of the item with the largest MCS number in the first MCS table is QPSK. The coding rate and spectral efficiency are reserved; or,

The modulation mode of the item with the largest MCS number in the first MCS table is 64QAM, the coding rate and the spectrum efficiency are reserved, and the modulation mode of the item with the largest MCS number in the first MCS table is QPSK. The coding rate and spectral efficiency are reserved; or,

The modulation mode, coding rate, and spectral efficiency of the item of at least one of the first MCS tables are reserved.
The method according to claim 26 or 27, wherein the value range of the CQI number in the first CQI table is the same as the value range of the CQI number in the second CQI table.
The method according to any one of claims 21 to 36, wherein the first MCS table includes 32 items, and the 32 items include all items in the first CQI table, the first CQI The table includes at least one item having a spectral efficiency less than 78/1024*2, wherein the 32 items further include at least one of a spectral efficiency not included in the first CQI table greater than 772/1024*6; wherein

The modulation mode corresponding to an MCS number X, the MCS number X-1, and the MCS number X is QPSK, and the modulation mode corresponding to the MCS number X+1 is 16QAM, and the coding rate of the MCS number X is equal to one of the following: Entire {(the encoding rate of the MCS number X-1*2+ the encoding rate of the MCS number X+1*4)/4}, rounded down {(the encoding rate of the MCS number X-1* 2+ encoding rate of the MCS number X+1 *4) / 4}, rounded { (the encoding rate of the MCS number X-1 * 2 the encoding rate of the MCS number X + 1 * 4) / 4 }, (the encoding rate of the MCS number X-1 *2+ the encoding rate of the MCS number X+1 *4) / 4;

An MCS number Y, the modulation mode corresponding to the MCS number Y-1 and the MCS number Y is 16QAM, and the modulation mode corresponding to the MCS number Y+1 is 64QAM, and the coding rate of the MCS number Y is equal to the following one: Entire {(the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8}, rounded down { (the encoding rate of the MCS number Y-1 * 4+ The coding rate of the MCS number Y+1*6)/8}, rounded to {(the coding rate of the MCS number Y-1*4+the coding rate of the MCS number Y+1*6)/8 }, (the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8, where Y is greater than X + 2.
A method according to any one of claims 21 to 37, wherein the conversion precoding is enabled;

If the terminal device reports support for pi/2 BPSK modulation, q=1, otherwise, q=2;

The modulation order of the reserved item corresponding to at least one of the MCS numbers 29, 30, 31 is determined according to the value of q.
A method according to any of claims 21-38, wherein the conversion precoding is enabled;

If the terminal device reports pi/2 BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation order supported by the terminal device;

The spectral efficiency corresponding to at least one MCS number is determined according to the value of q.
The method according to claim 39, wherein the spectral efficiency corresponding to the at least one MCS number is determined according to the value of q, including:

The spectral efficiency of the item corresponding to the MCS number 28 is a reserved value or a value greater than 772/1024*6, which is determined according to the value of q; or

The spectral efficiency of the item corresponding to the MCS number 28 is one of two values greater than 772/1024*6, which is determined according to the value of q.
The method according to claim 40, wherein the spectral efficiency of the item corresponding to the MCS number 28 is a value of 772/1024*6, which is determined according to the value of q, and includes:

q=1, the spectral efficiency of the item corresponding to MCS number 28 is reserved; and/or,

q=2, the spectral efficiency of the item corresponding to MCS number 28 is one of the following spectral efficiencies: 822/1024*6, 873/1024*6, 910/1024*6, 948/1024*6.
A communication device includes a processing unit and a transmitting unit, wherein

The processing unit is configured to determine N MCS indexes in a modulation and coding mode MCS table, where a coding rate corresponding to an MCS index X in the N MCS indexes is multiplied by a value of 1024 is less than or equal to a first threshold, where X is An integer greater than or equal to 0, N is a positive integer, and N is greater than or equal to X;

The sending unit is configured to send at least one MCS index of the N MCS indexes.
A communication device includes a receiving unit and a processing unit, wherein

The receiving unit is configured to receive downlink control information;

The processing unit is configured to obtain, according to the downlink control information, at least one MCS index in a modulation and coding mode MCS table,

The MCS table includes N MCS indexes, and the coding rate corresponding to the MCS index X in the N MCS indexes is multiplied by a value of 1024 that is less than or equal to a first threshold, where X is an integer greater than or equal to 0, and N is positive An integer, N is greater than or equal to X.
The communication device according to claim 42 or 43, wherein the first threshold is 119, and the coding rate corresponding to the MCS index X multiplied by a value of 1024 includes the following values: 30, 40, 50, 64, 78, and 99, wherein the modulation mode corresponding to the MCS index X is QPSK, and the modulation order is 2.
The communication apparatus according to claim 42 or 43, wherein the first threshold is 119, and the value of the coding rate corresponding to the MCS index X multiplied by 1024 includes the following values: 60, 80, and 100, wherein The modulation mode corresponding to the MCS index X is BPSK, and the modulation order is 1.
The communication device according to any one of claims 42 to 45, wherein the first MCS table includes items remaining after the items corresponding to the six MCS indexes in the second MCS table are removed.
The communication device according to any one of claims 42 to 46, wherein the first MCS table includes an item with an MCS index of 0, an item with an MCS index of 1, an item with an MCS index of 2, and an MCS index. For items of 3, items with an MCS index of 4 and items with an MCS index of 5 are items that are not included in the second MCS table.
The communication apparatus according to any one of claims 42 to 45, wherein the first MCS table does not include an MCS index of 25 in the second MCS table, an MCS index of 26, an MCS index of 27, and an MCS index. Is the corresponding item of 28.
The communication apparatus according to claim 46, wherein the items corresponding to the six MCS indexes in the removed second MCS table include an MCS index of 25, an MCS index of 26, an MCS index of 27, and an MCS index of 28 Corresponding item.
The communication apparatus according to any one of claims 42 to 49, wherein each of said first MCS tables corresponds to one MCS index, and each of said MCS indexes in said first MCS table The index corresponds to a modulation order, a coding rate multiplied by a value of 1024, and a spectral efficiency, wherein

The order of the MCS index of 6 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 120, and the spectral efficiency is 0.2344;

The order of the MCS index of 7 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 157, and the spectral efficiency is 0.3066;

The order of the MCS index of 8 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 193, and the spectral efficiency is 0.3770;

The order of the MCS index of 9 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 251, and the spectral efficiency is 0.4902;

The order of the MCS index of 10 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 308, and the spectral efficiency is 0.6016;

The order of the MCS index of 11 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 379, and the spectral efficiency is 0.7402;

The order of the MCS index of 12 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 449, and the spectral efficiency is 0.8770;

The order of the MCS index of 13 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 526, and the spectral efficiency is 1.0273;

The item with the MCS index of 14 corresponds to a modulation order of 2, the coding rate multiplied by 1024 is 602, and the spectral efficiency is 1.1758.
The communication device according to claim 50, wherein the first MCS table further comprises:

The item coding rate of the MCS index is 4, and the value of the value of 1024 is multiplied by 78, and the coding rate multiplied by the value of 1024 is 78, the modulation order is 2, and the spectral efficiency is 01523;

The MCS index is an item coding rate of 5 multiplied by a value of 1024, and the value of the coding rate multiplied by 1024 is a modulation order of 2 and a spectral efficiency of 01934.
The communication device according to claim 50, wherein the first MCS table further includes an item with an MCS index of 4, wherein

The coding rate corresponding to the item with the MCS index of 4 is multiplied by the value of 1024 by 78, the modulation order is 2, and the spectral efficiency is 01523; or

The coding rate corresponding to the item whose MCS index is 4 is multiplied by 1024, the value is 156, the modulation order is 1, and the spectral efficiency is 01523.
The communication device according to any one of claims 42 to 52, wherein the first MCS table further includes an item with an MCS index of 0, and the item with the MCS index of 0 corresponds to a spectrum efficiency of 0.0586. among them,

The modulation order is 2, and the coding rate multiplied by 1024 is 30, or,

The modulation order is 1, and the coding rate multiplied by 1024 is 60.
The communication device according to any one of claims 42 to 49, wherein the first MCS table further includes an item with an MCS index of 1, and an item with an MCS index of 1 corresponds to a spectral efficiency of 0.0781. among them,

The modulation order is 2, and the coding rate is multiplied by 1024 to be 40, or,

The modulation order is 1, and the coding rate multiplied by 1024 is 80.
The communication device according to any one of claims 42 to 49, wherein the first MCS table further includes:

The coding rate is multiplied by an item having a value of 1024 of 50, and the coding rate multiplied by a value of 1024 is 50, and the modulation order is 2, and the spectral efficiency is 0.0977;

The coding rate is multiplied by a value of 1024 with a value of 64. The coding rate multiplied by a value of 1024 has an modulation order of 2 and a spectral efficiency of 0.125.
The communication device according to any one of claims 42 to 49, wherein the first MCS table further includes:

The coding rate is multiplied by a value of 1024, the value of the coding rate multiplied by 1024 is 100, the modulation order is 1 and the spectral efficiency is 0.0977;

The coding rate is multiplied by a value of 1024 with a value of 128, and the coding rate multiplied by a value of 1024 is 128, and the modulation order is 1 and the spectral efficiency is 0.125.
The communication apparatus according to any one of claims 42 to 52, characterized in that the spectral efficiency corresponding to the item having the MCS index of 1 in the first MCS table is equal to (the item having the CQI number of 1 in the first CQI table) Corresponding spectral efficiency + spectral efficiency corresponding to the item with CQI number 2 in the first CQI table) divided by 2.
The communication apparatus according to any one of claims 42 to 52, characterized in that the spectral efficiency corresponding to the item having the MCS number of 3 in the first MCS table is equal to (the item having the CQI number of 2 in the first CQI table) Corresponding spectral efficiency + spectral efficiency corresponding to the item with CQI number 3 in the first CQI table is divided by 2.
The communication device according to claim 57 or claim 58, wherein all the items of the 64-phase quadrature amplitude modulation QAM in the first CQI table are part of the 64QAM in the second CQI table, wherein The partial term of 64QAM in the second CQI table is an item in the second CQI table with a CQI number of 10, a CQI number of 11, a CQI number of 12, and a CQI number of 13.
A communication device according to claim 46, 48 or 49, wherein said second MCS table is:
The communication device of claim 56, wherein said second CQI table is:
A communication device includes a transmitting unit and a receiving unit, and includes:

The sending unit is configured to send a first channel quality indicator CQI number, where the first CQI number is determined according to the first CQI table;

The receiving unit is configured to receive an MCS number in the first MCS table, where the first MCS table includes an item that is not included in the first CQI table, and a modulation manner in the first CQI table is The 64-phase quadrature amplitude modulates at least one term of the QAM.
A communication device includes a receiving unit and a sending unit, including:

The receiving unit is configured to receive a first channel quality indicator CQI number in the first CQI table;

The sending unit is configured to send a first MCS number, where the first MCS number is determined according to a first MCS table, where the first MCS table includes an item that is not included in the first CQI table, and The modulation method in the first CQI table is at least one term of 64-phase quadrature amplitude modulation QAM.
The communication apparatus according to claim 62 or 63, wherein said first MCS table includes all items except the item having the smallest CQI number corresponding to said first CQI table.
The communication device according to any one of claims 62 to 64, wherein the MCS number of the item not included in the first CQI table in the first MCS table is one of the following:

MCS number 0, MCS number 1, and MCS number 3.
The communication apparatus according to any one of claims 62 to 65, characterized in that the spectral efficiency of the item of the MCS number 0 in the first MCS table is smaller than the spectral efficiency of the item of the CQI number 1 in the first CQI table.
The communication apparatus according to any one of claims 62 to 66, wherein all of the items of the 64-phase quadrature amplitude modulation QAM in the first CQI table are part of 64QAM in the second CQI table. The partial items of 64QAM in the second CQI table are:

The CQI numbers corresponding to the partial items are consecutive, and at least one item other than the item having the largest CQI number corresponding to all the items in the second CQI table whose modulation mode is 64QAM; or

The partial item includes consecutive N items corresponding to the CQI number of the 64QAM in the second CQI table, and the first item of the consecutive N items is the corresponding modulation mode of the second CQI table is 64QAM. The smallest item of the CQI number, N is a positive integer greater than or equal to 1 and less than or equal to 5.
The communication device according to claim 67, wherein all items in the first CQI table whose modulation mode is 64QAM are part of 64QAM in the second CQI table, wherein 64QAM in the second CQI table The partial term is an item in the second CQI table with a CQI number of 10, a CQI number of 11, a CQI number of 12, and a CQI number of 13.
A communication apparatus according to any one of claims 62 to 68, wherein each of said first CQI tables corresponds to one CQI number, and each of said partial CQI numbers in said first CQI table The CQI number corresponds to a modulation mode, a coding rate, and a spectral efficiency;

The modulation mode corresponding to the item with the CQI number of 3 is QPSK, the coding rate multiplied by 1024 is 78, and the spectrum efficiency is 0.1523;

The modulation method corresponding to the item with CQI number 4 is QPSK, the coding rate multiplied by 1024 is 120, and the spectral efficiency is 0.2344;

The modulation method corresponding to the item with the CQI number of 5 is QPSK, the coding rate multiplied by 1024 is 193, and the spectrum efficiency is 0.3770;

The modulation method corresponding to the item with CQI number 6 is QPSK, the coding rate multiplied by 1024 is 308, and the spectral efficiency is 0.6016.

The modulation method corresponding to the item with CQI number 7 is QPSK, the coding rate multiplied by 1024 is 449, and the spectral efficiency is 0.8770;

The modulation method corresponding to the item with the CQI number of 8 is QPSK, the coding rate multiplied by 1024 is 602, and the spectrum efficiency is 1.1758;

The modulation method corresponding to the item with the CQI number of 9 is 16QAM, the coding rate multiplied by 1024 is 378, and the spectral efficiency is 1.4766.

The modulation method corresponding to the item with the CQI number of 10 is 16QAM, the coding rate multiplied by 1024 is 490, and the spectral efficiency is 1.9141;

The modulation method corresponding to the item with the CQI number of 11 is 16QAM, the coding rate multiplied by 1024 is 616, and the spectral efficiency is 2.4063.
Communication device according to any of claims 62-69, characterized in that the value of the coding rate multiplied by 1024 in the first CQI table comprises the following values: 30 and 50.
The communication device according to claim 70, wherein the value of the coding rate multiplied by 1024 in the first CQI table further comprises the following values: 78, 120, 193, 308, 449, 602, 378, 490, 616. , 466, 567, 666, and 772.
The communication apparatus according to claim 71, wherein said coding rate is multiplied by a value of 1024 in a corresponding coding rate and a spectral efficiency in an item in said first CQI table, comprising:

The coding rate multiplied by 1024 is 30. The modulation scheme is QPSK, and the spectral efficiency is 0.0586.

The coding rate multiplied by 1024 is 50. The modulation scheme is QPSK, and the spectral efficiency is 0.0977.

The coding rate multiplied by 1024 is 78. The modulation scheme is QPSK, and the spectral efficiency is 0.1523.

The coding rate multiplied by 1024 is 120, the modulation mode is QPSK, and the spectral efficiency is 0.2344.

The coding rate multiplied by 1024 is 193. The modulation scheme is QPSK, and the spectral efficiency is 0.3770.

The coding rate multiplied by 1024 is 308, the modulation mode is QPSK, and the spectral efficiency is 0.6016.

The coding rate multiplied by 1024 is 449. The modulation scheme is QPSK, and the spectral efficiency is 0.8770.

The coding rate multiplied by 1024 is 602. The modulation scheme corresponding to 602 is QPSK, and the spectral efficiency is 1.1758.

The coding rate multiplied by 1024 is 378, the modulation mode is 16QAM, and the spectral efficiency is 1.4766.

The coding rate multiplied by 1024 is 490, the modulation mode is 16QAM, and the spectral efficiency is 1.9141.

The coding rate multiplied by 1024 is 616, the modulation mode is 16QAM, and the spectral efficiency is 2.4063.

The coding rate multiplied by 1024 is 466, the modulation mode is 64QAM, and the spectral efficiency is 2.7305.

The coding rate multiplied by 1024 is 567, the modulation mode is 64QAM, and the spectral efficiency is 3.3223.

The coding rate multiplied by 1024 is 666, the modulation mode is 64QAM, and the spectral efficiency is 3.9023.

The coding rate multiplied by 1024 is 772. The modulation scheme is 64QAM and the spectral efficiency is 4.5234.
The communication apparatus according to any one of claims 62 to 72, wherein a coding rate corresponding to an MCS index X in the N MCS indexes in the first MCS table multiplied by a value of 1024 is less than or equal to a first threshold. Where X is an integer greater than or equal to 0, N is a positive integer, and N is greater than or equal to X.
The communication apparatus according to claim 73, wherein said first threshold is 119, and a code rate corresponding to said MCS index X multiplied by a value of 1024 includes the following values: 30, 40, 50, 64, 78, And 99, wherein the modulation mode corresponding to the MCS index X is QPSK, and the modulation order is 2.
The communication apparatus according to claim 73, wherein said first threshold is 119, and a value corresponding to a coding rate of said MCS index X multiplied by 1024 includes the following values: 60, 80, and 100, wherein The modulation method corresponding to the MCS index X is BPSK, and the modulation order is 1.
A communication device according to any one of claims 62 to 66, 68, wherein

Each item in the first MCS table corresponds to a modulation mode, a coding rate, and a spectral efficiency; or

The modulation method of the item with the largest MCS number in the first MCS table is QPSK, and the coding rate and the spectrum efficiency are reserved; or

The modulation mode of the item with the largest MCS number in the first MCS table is 16QAM, the coding rate and the spectrum efficiency are reserved, and the modulation mode of the item with the largest MCS number in the first MCS table is QPSK. The coding rate and spectral efficiency are reserved; or,

The modulation mode of the item with the largest MCS number in the first MCS table is 64QAM, the coding rate and the spectrum efficiency are reserved, and the modulation mode of the item with the largest MCS number in the first MCS table is QPSK. The coding rate and spectral efficiency are reserved; or,

The modulation mode, coding rate, and spectral efficiency of the item of at least one of the first MCS tables are reserved.
The communication apparatus according to claim 67 or 68, wherein the value range of the CQI number in the first CQI table is the same as the value range of the CQI number in the second CQI table.
The communication device according to any one of claims 62 to 77, wherein said first MCS table includes 32 items, and said 32 items include all items in said first CQI table, said first The CQI table includes at least one item whose spectral efficiency is less than 78/1024*2, and the 32 items further include at least one item whose spectral efficiency is not included in the first CQI table is greater than 772/1024*6;

The modulation mode corresponding to an MCS number X, the MCS number X-1, and the MCS number X is QPSK, and the modulation mode corresponding to the MCS number X+1 is 16QAM, and the coding rate of the MCS number X is equal to one of the following: Entire {(the encoding rate of the MCS number X-1*2+ the encoding rate of the MCS number X+1*4)/4}, rounded down {(the encoding rate of the MCS number X-1* 2+ encoding rate of the MCS number X+1 *4) / 4}, rounded { (the encoding rate of the MCS number X-1 * 2 the encoding rate of the MCS number X + 1 * 4) / 4 }, (the encoding rate of the MCS number X-1 * 2 the encoding rate of the MCS number X + 1 * 4) / 4;

An MCS number Y, the modulation mode corresponding to the MCS number Y-1 and the MCS number Y is 16QAM, and the modulation mode corresponding to the MCS number Y+1 is 64QAM, and the coding rate of the MCS number Y is equal to the following one: Entire {(the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8}, rounded down { (the encoding rate of the MCS number Y-1 * 4+ The coding rate of the MCS number Y+1*6)/8}, rounded to {(the coding rate of the MCS number Y-1*4+the coding rate of the MCS number Y+1*6)/8 }, (the encoding rate of the MCS number Y-1 *4 + the encoding rate of the MCS number Y+1 *6) / 8, where Y is greater than X + 2.
A communication apparatus according to any one of claims 62 to 78, wherein the conversion precoding is enabled;

If the terminal device reports support for pi/2 BPSK modulation, q=1, otherwise, q=2;

The modulation order of the reserved item corresponding to at least one of the MCS numbers 29, 30, 31 is determined according to the value of q.
Communication device according to any of claims 62-79, characterized in that the conversion precoding is enabled;

If the terminal device reports pi/2 BPSK modulation, q=1, otherwise, q=2, where q is the lowest modulation order supported by the terminal device;

The spectral efficiency corresponding to at least one MCS number is determined according to the value of q.
The communication device according to claim 80, wherein the spectral efficiency corresponding to the at least one MCS number is determined according to the value of q, including:

The spectral efficiency of the item corresponding to the MCS number 28 is a reserved value or a value greater than 772/1024*6, which is determined according to the value of q; or

The spectral efficiency of the item corresponding to the MCS number 28 is one of two values greater than 772/1024*6, which is determined according to the value of q.
The communication device according to claim 81, wherein the spectral efficiency of the item corresponding to the MCS number 28 is a value that is reserved or greater than 772/1024*6, and is determined according to the value of q, and includes:

q=1, the spectral efficiency of the item corresponding to MCS number 28 is reserved; and/or,

q=2, the spectral efficiency of the item corresponding to MCS number 28 is one of the following spectral efficiencies: 822/1024*6, 873/1024*6, 910/1024*6, 948/1024*6.
A computer storage medium, characterized in that the computer storage medium stores computer instructions that, when executed by a communication device, cause the communication device to perform the method of any one of claims 1-20.
A computer storage medium, characterized in that the computer storage medium stores computer instructions that, when executed by a communication device, cause the communication device to perform the method of any one of claims 21 to 41.
A communication device, comprising: a processor coupled to a memory, the processor executing instructions stored in a memory, such that the communication device performs the method of any one of claims 1-20 Methods.
A communication device, comprising: a processor coupled to a memory, the processor executing instructions stored in a memory, such that the communication device performs according to any one of claims 21-41 Methods.
A computer program product, characterized in that a computer program is stored thereon, which when executed by a communication device causes the communication device to perform the method according to any one of claims 1-20.
A computer program product, characterized in that a computer program is stored thereon, which when executed by a communication device causes the communication device to perform the method according to any one of claims 21 to 41.
A communication system comprising the communication device according to any one of claims 42 or 44-61, and the communication device according to any of claims 43-61.
A communication system comprising a communication device according to any of claims 62 or 64-82, and a communication device according to any of claims 63-82.