CN109600200B

CN109600200B - Transmission method, mobile communication terminal and network side equipment

Info

Publication number: CN109600200B
Application number: CN201710940923.9A
Authority: CN
Inventors: 刘昊; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2020-10-30
Anticipated expiration: 2037-09-30
Also published as: CN109600200A

Abstract

The invention provides a transmission method, a mobile communication terminal and network side equipment. The transmission method applied to the mobile communication terminal comprises the following steps: receiving a modulation coding strategy index sent by network side equipment; determining a first modulation coding mode corresponding to the modulation coding strategy index sent by the network side equipment according to the mapping relation between the modulation coding strategy index and the modulation coding mode; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment; when the mobile communication terminal does not support the first modulation coding mode, selecting a second modulation coding mode supported by the mobile communication terminal from the modulation coding modes recorded by the mapping relation; and transmitting uplink data by using the second modulation coding mode. The embodiment of the invention provides the design and the use of the MCS table which only needs to store one mapping relation at the network side and the mobile communication terminal side.

Description

Transmission method, mobile communication terminal and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a transmission method, a mobile communication terminal, and a network side device.

Background

The quality of the wireless channel affects the performance of the communication system, and the signal-to-noise ratio plays an important role as an index for measuring the quality of the wireless channel. Generally, it is not enough that the mobile communication terminal informs the network side of the snr value, and a feedback of possible modulation schemes is needed. In order to save signaling overhead in the LTE communication system, the terminal only reports a CQI (channel quality Indicator) index as a preliminary basis for the network side to determine the quality of a radio channel, and the network side maps the CQI index to obtain a 5-bit MCS (Modulation Coding Scheme) index, and then determines transmission parameters such as a Modulation Coding Scheme and a code rate used for transmission according to the MCS index.

The 5G NR (New Radio ) starts to discuss the design of CQI and MCS tables on NR #3 conference and initially forms a conclusion: for the design of the CQI table, it needs to be determined according to the maximum modulation scheme level that can be supported by the terminal. For example, if the terminal can only support maximum 64QAM (Quadrature Amplitude Modulation), a CQI table with a maximum Modulation mode of 64QAM is used; if the terminal can support the maximum 256QAM, a CQI table with the maximum modulation mode of 256QAM is adopted.

However, there is no theory as to how to design and use the MCS table in 5G NR, and therefore, it is necessary to propose a scheme with respect to the design and use of the MCS table.

Disclosure of Invention

The embodiment of the invention provides a transmission method, a mobile communication terminal and network side equipment for the design and the use of an MCS table.

In a first aspect, an embodiment of the present invention provides a transmission method applied to a mobile communication terminal, where the method includes:

receiving a modulation coding strategy index sent by network side equipment;

determining a first modulation coding mode corresponding to the modulation coding strategy index sent by the network side equipment according to the mapping relation between the modulation coding strategy index and the modulation coding mode; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

when the mobile communication terminal does not support the first modulation coding mode, selecting a second modulation coding mode supported by the mobile communication terminal from the modulation coding modes recorded by the mapping relation;

and transmitting uplink data by using the second modulation coding mode.

In a second aspect, an embodiment of the present invention further provides a transmission method, which is applied to a network device, and the method includes:

determining a modulation coding strategy index;

determining a first modulation coding mode corresponding to the modulation coding strategy index according to the mapping relation between the modulation coding strategy index and the modulation coding mode; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

and transmitting downlink data by using the second modulation coding mode.

In a third aspect, an embodiment of the present invention further provides a mobile communication terminal, where the mobile communication terminal includes:

the first receiving module is used for receiving a modulation and coding strategy index sent by network side equipment;

a first determining module, configured to determine, according to a mapping relationship between a modulation and coding strategy index and a modulation and coding scheme, a first modulation and coding scheme corresponding to the modulation and coding strategy index sent by the network side device; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

a first selecting module, configured to select, when the mobile communication terminal does not support the first modulation and coding scheme, a second modulation and coding scheme supported by the mobile communication terminal from the modulation and coding schemes recorded in the mapping relationship;

and the first transmission module is used for transmitting uplink data by utilizing the second modulation coding mode.

In a fourth aspect, an embodiment of the present invention further provides a network-side device, where the network-side device includes:

a third determining module, configured to determine a modulation and coding strategy index;

a fourth determining module, configured to determine, according to a mapping relationship between a modulation and coding strategy index and a modulation and coding scheme, a first modulation and coding scheme corresponding to the modulation and coding strategy index; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

a second selecting module, configured to select, when the mobile communication terminal does not support the first modulation and coding scheme, a second modulation and coding scheme supported by the mobile communication terminal from the modulation and coding schemes recorded in the mapping relationship;

and the second transmission module is used for transmitting the downlink data by utilizing the second modulation coding mode.

In a fifth aspect, an embodiment of the present invention further provides a mobile communication terminal, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the transmission method applied to the mobile communication terminal are implemented.

In a sixth aspect, an embodiment of the present invention further provides a network-side device, where the network-side device includes a processor, a memory, and a computer program stored in the memory and being executable on the processor, and when the computer program is executed by the processor, the steps of the transmission method applied to the network-side device are implemented.

In a seventh aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements the steps of the transmission method applied to the mobile communication terminal, or implements the steps of the transmission method applied to the network-side device, as described above.

In the embodiment of the present invention, at both the network side and the mobile communication terminal side, the determination of the modulation and coding scheme can be implemented only by using one mapping relationship corresponding to the highest level modulation and coding scheme, and compared with the determination of the modulation and coding scheme by using the mapping relationships corresponding to different modulation and coding schemes, the method and the mobile communication terminal have at least one of the following beneficial effects:

1. in the embodiment of the invention, the network side and the mobile communication terminal side only need to store one mapping relation, so that the storage capacity requirements of the network side and the mobile communication terminal side are reduced;

2. in the embodiment of the invention, the network side and the mobile communication terminal side only need to store one mapping relation, and the network side and the mobile communication terminal do not need to execute other operations such as mapping relation selection and the like, so that the complexity of the system is reduced;

3. in the embodiment of the invention, the network side and the mobile communication terminal side only need to store one mapping relation, so that the network side does not need to indicate which mapping relation corresponds to when sending the MCS index, thereby reducing the signaling indication overhead.

Drawings

Fig. 1 is a flowchart of a transmission method according to an embodiment of the present invention;

fig. 2 is a second flowchart of a transmission method according to an embodiment of the present invention;

fig. 3 is a third flowchart of a transmission method according to an embodiment of the present invention;

fig. 4 is a fourth flowchart of a transmission method according to an embodiment of the present invention;

fig. 5 is one of the structural diagrams of a mobile communication terminal according to an embodiment of the present invention;

fig. 6 is one of the structural diagrams of the network side device according to the embodiment of the present invention;

fig. 7 is a second block diagram of a mobile communication terminal according to an embodiment of the present invention;

fig. 8 is a second structural diagram of a network-side device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a flowchart of a transmission method according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:

step 101, receiving a modulation coding strategy index sent by a network side device;

the transmission method provided by the embodiment of the invention is applied to a mobile communication terminal and is used for controlling the modulation coding mode of uplink data transmission.

In this step, the network side device may determine, according to the channel Quality indicator cqi (channel Quality indicator), a modulation and coding strategy index that is sent by the mobile communication terminal in the uplink direction, and send the modulation and coding strategy index to the mobile communication terminal to indicate a modulation and coding scheme that the mobile communication terminal performs uplink transmission. For example, the Modulation and coding scheme for uplink data transmission may include BPSK (binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, and 256 QAM.

Step 102, determining a first modulation and coding mode corresponding to a modulation and coding strategy index sent by the network side equipment according to a mapping relation between the modulation and coding strategy index and the modulation and coding mode; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

it should be understood that, since whether different mobile communication terminals can support the highest modulation and coding scheme is not consistent, and the mapping relationship needs to be for all mobile communication terminals, the modulation and coding schemes supported by all mobile communication terminals are included in the mapping relationship, that is, the mapping relationship corresponds to the highest modulation and coding scheme supported by the mobile communication system.

After receiving the modulation and coding strategy index sent by the network side equipment, the mobile communication terminal searches and obtains a first modulation and coding mode corresponding to the modulation and coding strategy index sent by the network side equipment according to the mapping relation. Specifically, the mapping relationship may be stored in the form of an MCS table.

103, when the mobile communication terminal does not support the first modulation and coding mode, selecting a second modulation and coding mode supported by the mobile communication terminal from the modulation and coding modes recorded by the mapping relation;

and 104, utilizing the second modulation coding mode to transmit uplink data.

In the above step, since the network side device usually sends the modulation and coding strategy index corresponding to the maximum modulation and coding scheme that can be supported in the CQI state according to the CQI sent by the mobile communication terminal, however, the capabilities of the mobile communication terminal are different, and there may be a modulation and coding scheme that supports the modulation and coding scheme corresponding to the modulation and coding strategy index, or a modulation and coding scheme that does not support the modulation and coding scheme corresponding to the modulation and coding strategy index. Specifically, after the mobile communication terminal determines the modulation and coding scheme indicated by the network side according to the mapping relationship, it determines whether the mobile communication terminal supports the first modulation and coding scheme according to the capability status of the mobile communication terminal. If the mobile communication terminal does not support the first modulation coding mode, performing uplink data transmission from a second modulation coding mode which is recorded in the mapping relation and does not support the first modulation coding mode; and if the mobile communication terminal supports the first modulation coding mode, carrying out uplink data transmission according to the first modulation coding mode.

Two different waveforms are defined in NR: cyclic prefix orthogonal frequency division multiplexing multiple access CP-OFDM and discrete fourier transform spread orthogonal frequency division multiplexing multiple access DFT-S-OFDM (mainly used in the case of power limitation of the uplink). The modulation schemes supported by each waveform are slightly different, as shown in table one below.

Watch 1

CP-OFDM	DFT-S-OFDM
			π/2-BPSK
QPSK	QPSK
		16QAM	16QAM
64QAM	64QAM
		256QAM	256QAM

It can be found that the modulation and coding scheme sets corresponding to different OFDM waveforms are different, and therefore, different mapping relationships need to be set for different OFDM waveforms. Since the waveforms used for data transmission are different and the mapping relationships corresponding to the waveforms are also different, in the embodiment of the present invention, when the mobile communication system defines different waveforms, the mapping relationship needs to be determined first, and further, referring to fig. 2, in the step 102, it includes:

step 1021, selecting a mapping relation corresponding to an orthogonal frequency division multiplexing multiple access waveform used for current transmission;

step 1022, determining a first modulation and coding scheme corresponding to the modulation and coding strategy index sent by the network side device according to the mapping relationship between the selected modulation and coding strategy index and the modulation and coding scheme.

In this embodiment, the ofdm multiple access waveform includes: cyclic prefix orthogonal frequency division multiplexing multiple access and discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access. The modulation coding mode supported in the MCS table of the cyclic prefix orthogonal frequency division multiplexing multiple access comprises the following steps: QPSK, 16QAM, 64QAM, and 256 QAM; the modulation coding mode supported by the MCS table of the orthogonal frequency division multiplexing multiple access of the discrete Fourier transform spread spectrum comprises the following steps: BPSK, QPSK, 16QAM, 64QAM, and 256 QAM.

The QPSK modulation mode generally works in a low signal-to-noise ratio scene, is influenced by system interference random jitter and channel estimation precision, and is difficult to obtain accurate CQI feedback; in addition, the throughput of the current scene is not a main system concern target, and the corresponding MCS table area does not need to be designed too finely. Therefore, the accuracy of Q-5 bit can cover all cases of { QPSK, 16QAM, 64QAM, 256QAM } without affecting the throughput performance.

In comparison, the modulation and coding scheme corresponding to the ofdm multiple access of the discrete fourier transform spread spectrum is one more BPSK, and in the scenario of the ofdm multiple access of the discrete fourier transform spread spectrum, since the ofdm multiple access tends to work at the cell edge, the occurrence probability of the low-to-low signal-to-noise ratio is high, and thus the probability of using 256QAM is relatively low. For high-order modulation 256QAM with low occurrence probability, the corresponding area in the MCS table does not need to be designed to be too fine, and a part of the original MCS indexes corresponding to the 256QAM can be divided into BPSK.

It should be noted that, when the mobile communication terminal does not support the first modulation and coding scheme, the rule for selecting the second modulation and coding scheme may be set according to actual needs, for example, in this embodiment, in order to ensure throughput and transmission rate of the system, the second modulation and coding scheme may be selected as: and among the modulation coding modes recorded by the mapping relation, the modulation coding mode with the highest grade supported by the mobile communication terminal.

In this embodiment, the highest modulation and coding scheme of the mobile communication terminal is used as the second modulation and coding scheme, so that the transmission rate of uplink transmission data can be increased as much as possible.

For example, when the MCS Index received from the network side device is 22 corresponding to 256QAM, if the highest modulation code supported by the mobile communication terminal is 64QAM, the mobile communication terminal determines that the first modulation and coding scheme is 256QAM according to the mapping relationship, and at this time, the mobile communication terminal will search for the second modulation and coding scheme again from the mapping relationship record, in this embodiment, the second modulation and coding scheme is 64QAM, and the mobile communication terminal will perform uplink transmission in the modulation and coding scheme of 64 QAM. If the highest modulation code supported by the mobile communication terminal is 256QAM, the mobile communication terminal performs uplink transmission in the modulation and coding scheme of 256 QAM.

Further, the network side device may further indicate the spectrum efficiency of data transmission of the mobile communication device through the modulation and coding strategy index. Referring to fig. 3, after the step 101, the method further includes:

step 105, determining a first target spectrum efficiency corresponding to the modulation and coding strategy index sent by the network side equipment according to the mapping relation between the modulation and coding strategy index and the spectrum efficiency;

the step 104 is specifically:

and transmitting uplink data by using the second modulation coding mode and the first target spectrum efficiency.

In this embodiment, the MCS table further stores a mapping relationship between the modulation and coding strategy index and the spectral efficiency, and specifically, as shown in the following table two, the MCS table stores a mapping relationship between the modulation and coding strategy index and the spectral efficiency and a mapping relationship between the modulation and coding strategy index and the modulation and coding scheme.

Watch two

In this embodiment, when the MCS Index received from the network side device is 22, if the highest modulation and coding scheme supported by the mobile communication terminal is 64QAM, the mobile communication terminal determines that the first modulation and coding scheme is 256QAM according to the mapping relationship, and at this time, the mobile communication terminal will search for the second modulation and coding scheme again from the mapping relationship record, where in this embodiment, the second modulation and coding scheme is 64QAM, and the mobile communication terminal will perform uplink transmission in the modulation and coding scheme of 64 QAM.

In this case, the determination of the spectral efficiency may be set according to actual needs, for example, in this embodiment, the spectral efficiency corresponding to one MCS Index may be selected from the MCS indexes corresponding to the second modulation and coding schemes as the first target spectral efficiency, but it is understood that, in order to improve the transmission rate, one spectral efficiency corresponding to the highest spectral efficiency in the second modulation and coding schemes is usually selected as the first target spectral efficiency, and for example, the spectral efficiency of 5.04 may be selected as the first target spectral efficiency. It should be noted that, when the mobile communication terminal capability only supports the highest 64QAM, the maximum frequency offset efficiency reached by the table two is 5.04, while the actual 64QAM theory can reach 0.93 × 6 to 5.58, when the spectrum efficiency corresponding to the CQI index reported by the terminal is greater than or equal to 5.58, the table two MCS index is selected to be 22, the second modulation and coding scheme selected at this time is 64QAM, and the first target frequency efficiency can be selected to be 5.58, that is, the MCS index of the selected spectrum efficiency is kept unchanged, so that the mobile communication terminal performs uplink transmission with the modulation and coding scheme of 64QAM and the spectrum efficiency of 5.58.

In this embodiment, different MCS tables may be defined for different highest supported modulation and coding schemes of different mobile communication terminals, or a maximum MCS table may be defined according to the highest supported modulation and coding scheme of all mobile communication terminals, and the maximum MCS table is decoded according to the highest supported modulation and coding scheme of the mobile communication terminal, so as to obtain an MCS table correspondingly supported by the mobile communication terminal. For example, the modulation and coding scheme supported by the mobile communication terminal is 64QAM, and when the MCS table is interpreted, the modulation scheme corresponding to MCS Index 22 in the table is 6, and the mapping record of MCS Index 23 to 27 is none, as shown in table three below.

Watch III

Further, referring to fig. 4, the present invention further provides a transmission method, as shown in fig. 4, the transmission method includes:

step 401, determining a modulation and coding strategy index;

the transmission method provided by the embodiment of the invention is applied to network side equipment and is used for controlling the modulation coding mode of downlink data transmission.

In this step, the network side device may determine, according to a channel Quality indicator cqi (channel Quality indicator), a Modulation and coding strategy index for downlink transmission to the mobile communication terminal, where the Modulation and coding strategy index is used to indicate a coding scheme, where contents specifically included in the coding scheme may be set according to actual needs, and for example, the Modulation and coding scheme for downlink data transmission may include BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation, QAM), 64QAM, and 256QAM, and the like.

Step 402, determining a first modulation coding mode corresponding to a modulation coding strategy index according to a mapping relation between the modulation coding strategy index and the modulation coding mode; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

After determining the modulation and coding strategy index, the network side device searches for and obtains a first modulation and coding mode corresponding to the modulation and coding strategy index according to the mapping relation. Specifically, the mapping relationship may be stored in the form of an MCS table.

Step 403, when the mobile communication terminal does not support the first modulation and coding scheme, selecting a second modulation and coding scheme supported by the mobile communication terminal from the modulation and coding schemes recorded in the mapping relationship;

and step 404, utilizing the second modulation and coding mode to perform downlink data transmission.

In this step, the capabilities of the mobile communication terminals are different, and there may be a modulation and coding scheme corresponding to the modulation and coding strategy index that is supported, or a modulation and coding scheme corresponding to the modulation and coding strategy index that is not supported. Specifically, after the network side device determines the modulation and coding scheme indicated by the network side according to the mapping relationship, it is determined whether the mobile communication terminal supports the first modulation and coding scheme. If the mobile communication terminal does not support the first modulation coding mode, downlink data transmission is carried out from a second modulation coding mode which is recorded in the mapping relation and does not support the first modulation coding mode; if the mobile communication terminal supports the first modulation coding mode, downlink data transmission is carried out according to a second modulation coding mode. Specifically, the method for the network side device to know the highest modulation and coding scheme supported by the mobile communication terminal may be set according to actual needs, for example, the method may be determined by reporting capability information or reported CQI (for example, the reported CQI corresponds to the modulation and coding scheme).

Meanwhile, when the mobile communication system defines different waveforms, the step 402 includes:

selecting a mapping relation corresponding to an orthogonal frequency division multiplexing multiple access waveform used for current transmission;

and determining a first modulation coding mode corresponding to the modulation coding strategy index according to the mapping relation between the selected modulation coding strategy index and the modulation coding mode.

In this embodiment, the ofdm multiple access waveform includes: cyclic prefix orthogonal frequency division multiplexing multiple access and discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access. The modulation coding modes supported in the MCS table of the cyclic prefix orthogonal frequency division multiplexing multiple access comprise QPSK, 16QAM, 64QAM and 256 QAM; the modulation coding mode supported by the MCS table of the orthogonal frequency division multiplexing multiple access of the discrete Fourier transform spread spectrum comprises the following steps: BPSK, QPSK, 16QAM, 64QAM, and 256 QAM.

In this embodiment, the highest modulation and coding scheme of the mobile communication terminal is used as the second modulation and coding scheme, so that the transmission rate of downlink transmission data can be increased as much as possible.

For example, when the MCS Index received from the network side device is 22 corresponding to 256QAM, if the highest modulation code supported by the mobile communication terminal is 64QAM, the mobile communication terminal determines that the first modulation and coding scheme is 256QAM according to the mapping relationship, at this time, the mobile communication terminal will search for the second modulation and coding scheme again from the mapping relationship record, in this embodiment, the second modulation and coding scheme is 64QAM, and the network side device will perform downlink transmission in the modulation and coding scheme of 64 QAM. If the highest modulation code supported by the mobile communication terminal is 256QAM, the mobile communication terminal performs downlink transmission in the modulation and coding scheme of 256 QAM.

Further, the network side device may also determine the spectral efficiency by modulating the coding strategy index. Specifically, after the step 401, the method further includes:

determining a second target spectrum efficiency corresponding to the modulation coding strategy index according to the mapping relation between the modulation coding strategy index and the spectrum efficiency;

the step 404 is specifically: and transmitting downlink data by using the second modulation coding mode and the second target spectrum efficiency.

In this embodiment, the MCS table further stores a mapping relationship between the modulation and coding strategy index and the spectral efficiency, and specifically, the MCS table stores a mapping relationship between the modulation and coding strategy index and the spectral efficiency and a mapping relationship between the modulation and coding strategy index and the modulation and coding scheme.

In this embodiment, when the MCS Index received from the network side device is 22, if the highest modulation and coding scheme supported by the mobile communication terminal is 64QAM, the mobile communication terminal determines that the first modulation and coding scheme is 256QAM according to the mapping relationship, and at this time, the mobile communication terminal will search for the second modulation and coding scheme from the mapping relationship record again, in this embodiment, the second modulation and coding scheme is 64QAM, and the network side device will perform downlink transmission in the modulation and coding scheme of 64 QAM. In this case, the determination of the spectral efficiency may be set according to actual needs, for example, in this embodiment, the spectral efficiency corresponding to one MCS Index may be selected from the MCS indexes corresponding to the second modulation and coding scheme as the second target spectral efficiency, but it is understood that, in order to improve the transmission rate, one spectral efficiency corresponding to the highest spectral efficiency in the second modulation and coding scheme is usually selected as the second target spectral efficiency, and for example, the spectral efficiency of 5.04 may be selected as the second target spectral efficiency. It should be noted that, when the mobile communication terminal capability only supports the highest 64QAM, the maximum frequency offset efficiency reached by the above table two is 5.04, and the actual 64QAM theory can reach 0.93 × 6 to 5.58, when the spectral efficiency corresponding to the CQI index reported by the terminal is greater than or equal to 5.58, the table two MCS index is selected to be 22, the second modulation and coding scheme selected at this time is 64QAM, and the first target frequency efficiency can be selected to be 5.58, that is, the MCSindex selecting the spectral efficiency is kept unchanged, so that the network side device performs downlink transmission with the modulation and coding scheme of 64QAM and the spectral efficiency of 5.58.

In this embodiment, different MCS tables may be defined for different highest supported modulation and coding schemes of different mobile communication terminals, or a maximum MCS table may be defined according to the highest supported modulation and coding scheme of all mobile communication terminals, and the maximum MCS table is decoded according to the highest supported modulation and coding scheme of the mobile communication terminal, so as to obtain an MCS table correspondingly supported by the mobile communication terminal. For example, the highest supported modulation and coding scheme of the mobile communication terminal is 64QAM, and when the MCS table is decoded, the modulation scheme corresponding to MCSIndex 22 is 6. And a mapping record with an MCS Index of 23 to 27 is none.

Further, in order to ensure that the mobile communication terminal can demodulate the downlink transmission data and perform uplink data transmission normally, the method further includes:

and transmitting the modulation and coding strategy index to the mobile communication terminal.

In this embodiment, after receiving the modulation and coding strategy index sent by the network side, the mobile communication terminal may determine the modulation and coding scheme and the spectral efficiency of the downlink transmission data according to the mapping relationship between the modulation and coding strategy index and the modulation and coding scheme and the relationship between the modulation and coding strategy index and the spectral efficiency in the MCS table, so as to demodulate the downlink transmission data and transmit the uplink data.

Referring to fig. 5, fig. 5 is a block diagram of a mobile communication terminal according to an embodiment of the present invention, and as shown in fig. 5, the mobile communication terminal 500 includes: a first receiving module 501, a first determining module 502, a first selecting module 503, and a first transmitting module 504.

The first receiving module 501 is configured to receive a modulation and coding strategy index sent by a network side device;

a first determining module 502, configured to determine, according to a mapping relationship between a modulation and coding strategy index and a modulation and coding scheme, a first modulation and coding scheme corresponding to the modulation and coding strategy index sent by the network side device; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

a first selecting module 503, configured to select, when the mobile communication terminal does not support the first modulation and coding scheme, a second modulation and coding scheme supported by the mobile communication terminal from the modulation and coding schemes recorded in the mapping relationship;

a first transmission module 504, configured to perform uplink data transmission by using the second modulation and coding scheme.

Optionally, the second modulation and coding scheme is as follows: and among the modulation coding modes recorded by the mapping relation, the modulation coding mode with the highest grade supported by the mobile communication terminal.

Optionally, the mobile communication terminal 500 further includes:

the second determining module is used for determining a first target spectrum efficiency corresponding to the modulation and coding strategy index sent by the network side equipment according to the mapping relation between the modulation and coding strategy index and the spectrum efficiency after receiving the modulation and coding strategy index sent by the network side equipment;

the first transmission module is specifically configured to perform uplink data transmission by using the second modulation and coding scheme and the first target spectrum efficiency.

Optionally, the first determining module 502 includes:

the first selection submodule is used for selecting a mapping relation corresponding to the orthogonal frequency division multiplexing multiple access waveform used by current transmission;

and the first determining submodule is used for determining a first modulation and coding mode corresponding to the modulation and coding strategy index sent by the network side equipment according to the mapping relation between the selected modulation and coding strategy index and the modulation and coding mode.

Optionally, the ofdm multiple access waveform includes: cyclic prefix orthogonal frequency division multiplexing multiple access and discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access.

The mobile communication terminal 500 can implement each process implemented by the mobile communication terminal in the method embodiments of fig. 1 to fig. 3, and is not described herein again to avoid repetition.

Referring to fig. 6, fig. 6 is a structural diagram of a network side device according to an embodiment of the present invention, and as shown in fig. 6, the network side device 600 includes: a third determining module 601, a fourth determining module 602, a second selecting module 603 and a second transmitting module 604.

The third determining module 601 is configured to determine a modulation and coding strategy index;

a fourth determining module 602, configured to determine, according to a mapping relationship between a modulation and coding strategy index and a modulation and coding scheme, a first modulation and coding scheme corresponding to the modulation and coding strategy index; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment;

a second selecting module 603, configured to select, when the mobile communication terminal does not support the first modulation and coding scheme, a second modulation and coding scheme supported by the mobile communication terminal from the modulation and coding schemes recorded in the mapping relationship;

a second transmission module 604, configured to perform downlink data transmission by using the second modulation and coding scheme.

Optionally, the network-side device 600 further includes:

a fifth determining module, configured to determine, after determining the modulation and coding strategy index, a second target spectral efficiency corresponding to the modulation and coding strategy index according to a mapping relationship between the modulation and coding strategy index and the spectral efficiency;

the second transmission module is specifically configured to perform downlink data transmission by using the second modulation and coding scheme and the second target spectrum efficiency.

Optionally, the network-side device 600 further includes:

a sending module, configured to send the index of modulation and coding strategy to the mobile communication terminal.

Optionally, the fourth determining module 602 includes:

the second selection submodule is used for selecting a mapping relation corresponding to the orthogonal frequency division multiplexing multiple access waveform used for current transmission;

and the second determining submodule is used for determining the first modulation coding mode corresponding to the modulation coding strategy index according to the mapping relation between the selected modulation coding strategy index and the modulation coding mode.

The network side device 600 can implement each process implemented by the network side device in the method embodiment of fig. 4, and is not described here again to avoid repetition.

Referring to fig. 7, fig. 7 is a block diagram of a mobile communication terminal according to another embodiment of the present invention, where the mobile communication terminal may be a hardware structure diagram of a mobile communication terminal for implementing various embodiments of the present invention. As shown in fig. 7, the mobile communication terminal 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, a power supply 711, and the like. Those skilled in the art will appreciate that the mobile communication terminal configuration shown in fig. 7 does not constitute a limitation of the mobile communication terminal, and that the mobile communication terminal may include more or less components than those shown, or combine some components, or a different arrangement of components. In the embodiment of the present invention, the mobile communication terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 701 is configured to receive a modulation and coding strategy index sent by a network side device; and transmitting uplink data by using the second modulation coding mode.

A processor 710, configured to determine, according to a mapping relationship between a modulation and coding strategy index and a modulation and coding scheme, a first modulation and coding scheme corresponding to the modulation and coding strategy index sent by the network side device; the mapping relation corresponds to the highest-level modulation coding mode supported by the network side equipment; and when the mobile communication terminal does not support the first modulation coding mode, selecting a second modulation coding mode supported by the mobile communication terminal from the modulation coding modes recorded by the mapping relation.

Optionally, the processor 710 is further configured to: determining a first target spectrum efficiency corresponding to a modulation and coding strategy index sent by the network side equipment according to a mapping relation between the modulation and coding strategy index and the spectrum efficiency;

the radio frequency unit 701 is further configured to: and transmitting uplink data by using the second modulation coding mode and the first target spectrum efficiency.

Optionally, the processor 710 is further configured to:

and determining a first modulation coding mode corresponding to the modulation coding strategy index sent by the network side equipment according to the mapping relation between the selected modulation coding strategy index and the modulation coding mode.

It should be noted that, in this embodiment, the mobile communication terminal 700 may be a mobile communication terminal according to any implementation manner in the method embodiment of the present invention, that is, any implementation manner of the mobile communication terminal in the method embodiment of the present invention may be implemented by the mobile communication terminal 700 in this embodiment, and the same beneficial effects are achieved, and in order to avoid repetition, no further description is given here.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 710; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 may also communicate with a network and other devices through a wireless communication system.

The mobile communication terminal provides the user with wireless broadband internet access, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like, through the network module 702.

The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output related to a specific function performed by the mobile communication terminal 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.

The input unit 704 is used to receive audio or video signals. The input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 706. The image frames processed by the graphic processor 7041 may be stored in the memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 701 in case of a phone call mode.

The mobile communication terminal 700 further includes at least one sensor 705, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or a backlight when the mobile communication terminal 700 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile communication terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 706 is used to display information input by the user or information provided to the user. The Display unit 706 may include a Display panel 7061, and the Display panel 7061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 707 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile communication terminal. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 710, receives a command from the processor 710, and executes the command. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 710 to determine the type of the touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although the touch panel 7071 and the display panel 7061 are shown in fig. 7 as two separate components to implement the input and output functions of the mobile communication terminal, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the mobile communication terminal, which is not limited herein.

The interface unit 708 is an interface through which an external device is connected to the mobile communication terminal 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile communication terminal 700 or may be used to transmit data between the mobile communication terminal 700 and the external device.

The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 709 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 710 is a control center of the mobile communication terminal, connects various parts of the entire mobile communication terminal using various interfaces and lines, and performs various functions of the mobile communication terminal and processes data by operating or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby integrally monitoring the mobile communication terminal. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.

The mobile communication terminal 700 may further include a power supply 711 (e.g., a battery) for supplying power to various components, and preferably, the power supply 711 may be logically connected to the processor 710 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the mobile communication terminal 700 includes some functional modules that are not shown, and thus, will not be described in detail herein.

Preferably, an embodiment of the present invention further provides a mobile communication terminal, including a processor 710, a memory 709, and a computer program stored in the memory 709 and capable of running on the processor 710, where the computer program is executed by the processor 710 to implement the processes of the transmission method embodiment applied to the mobile communication terminal, and can achieve the same technical effects, and in order to avoid repetition, the descriptions are omitted here.

Referring to fig. 8, fig. 8 is a structural diagram of a network side device according to another embodiment of the present invention, and as shown in fig. 8, the network side device 800 includes: a processor 801, a memory 802, a user interface 803, a transceiver 804 and a bus interface.

In this embodiment of the present invention, the network side device 800 further includes: a computer program stored on the memory 802 and executable on the processor 801, the computer program when executed by the processor 801 implementing the steps of:

determining a modulation coding strategy index;

and transmitting downlink data by using the second modulation coding mode.

In FIG. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 801 and various circuits of memory represented by memory 802 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 804 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 803 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 2601 in performing operations.

Optionally, the computer program when executed by the processor 801 further implements the steps of:

the downlink data transmission by using the second modulation and coding scheme specifically includes:

and transmitting downlink data by using the second modulation coding mode and the second target spectrum efficiency.

It should be noted that, in this embodiment, the network-side device 800 may be a network-side device in any implementation manner in the method embodiment of the present invention, that is, any implementation manner of a mobile network-side device in the method embodiment of the present invention may be implemented by the network-side device 800 in this embodiment, and the same beneficial effects are achieved, and in order to avoid repetition, details are not described here again.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the foregoing transmission method embodiment applied to the mobile communication terminal or the foregoing transmission method embodiment applied to the network side device, and can achieve the same technical effect, and in order to avoid repetition, the details are not described here again. The computer-readable storage medium may be a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A transmission method for a mobile communication terminal, the transmission method comprising:

receiving a modulation coding strategy index sent by network side equipment;

and transmitting uplink data by using the second modulation coding mode.

2. The transmission method according to claim 1, wherein the second modulation and coding scheme is: and among the modulation coding modes recorded by the mapping relation, the modulation coding mode with the highest grade supported by the mobile communication terminal.

3. The transmission method according to claim 1 or 2, wherein after receiving the modulation and coding strategy index sent by the network side device, the method further comprises:

determining a first target spectrum efficiency corresponding to a modulation and coding strategy index sent by the network side equipment according to a mapping relation between the modulation and coding strategy index and the spectrum efficiency;

the uplink data transmission by using the second modulation and coding scheme specifically includes:

4. The transmission method according to claim 1 or 2, wherein the determining, according to the mapping relationship between the modulation and coding strategy index and the modulation and coding scheme, the first modulation and coding scheme corresponding to the modulation and coding strategy index sent by the network side device specifically includes:

5. The transmission method of claim 4, wherein the orthogonal frequency division multiplexing multiple access waveform comprises: cyclic prefix orthogonal frequency division multiplexing multiple access and discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access.

6. A transmission method is used for a network side device, and is characterized in that the transmission method comprises the following steps:

determining a modulation coding strategy index;

and transmitting downlink data by using the second modulation coding mode.

7. The transmission method according to claim 6, wherein the second modulation and coding scheme is: and among the modulation coding modes recorded by the mapping relation, the modulation coding mode with the highest grade supported by the mobile communication terminal.

8. The transmission method according to claim 6 or 7, wherein after determining the modulation and coding scheme index, further comprising:

9. The transmission method according to claim 6 or 7, further comprising:

10. The transmission method according to claim 6 or 7, wherein the determining, according to the mapping relationship between the modulation and coding strategy index and the modulation and coding scheme, the first modulation and coding scheme corresponding to the modulation and coding strategy index specifically includes:

11. The transmission method of claim 10, wherein the orthogonal frequency division multiplexing multiple access waveform comprises: cyclic prefix orthogonal frequency division multiplexing multiple access and discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access.

12. A mobile communication terminal, comprising:

13. The mobile communication terminal according to claim 12, wherein the second modulation and coding scheme is: and among the modulation coding modes recorded by the mapping relation, the modulation coding mode with the highest grade supported by the mobile communication terminal.

14. The mobile communication terminal according to claim 12 or 13, further comprising:

15. The mobile communication terminal according to claim 12 or 13, wherein the first determining module comprises:

16. The mobile communication terminal of claim 15, wherein the orthogonal frequency division multiplexing multiple access waveform comprises: cyclic prefix orthogonal frequency division multiplexing multiple access and discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access.

17. A network side device, wherein the network side device comprises:

18. The network-side device of claim 17, wherein the second modulation and coding scheme is: and among the modulation coding modes recorded by the mapping relation, the modulation coding mode with the highest grade supported by the mobile communication terminal.

19. The network-side device according to claim 17 or 18, further comprising:

20. The network-side device according to claim 17 or 18, further comprising:

21. The network-side device of claim 17 or 18, wherein the fourth determining module comprises:

22. The network-side device of claim 21, wherein the orthogonal frequency division multiplexing multiple access waveform comprises: cyclic prefix orthogonal frequency division multiplexing multiple access and discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access.

23. A mobile communication terminal, characterized in that it comprises a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the transmission method according to any one of claims 1 to 5.

24. A network-side device, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the transmission method according to any one of claims 6 to 11.

25. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the transmission method according to one of the claims 1 to 5 or carries out the steps of the transmission method according to one of the claims 6 to 11.