CN108880745A - A kind of MCS selection method and system based on 5G communication network - Google Patents

A kind of MCS selection method and system based on 5G communication network Download PDF

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Publication number
CN108880745A
CN108880745A CN201810367461.0A CN201810367461A CN108880745A CN 108880745 A CN108880745 A CN 108880745A CN 201810367461 A CN201810367461 A CN 201810367461A CN 108880745 A CN108880745 A CN 108880745A
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value
channel quality
signal
noise ratio
subcarrier
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林啸
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Institute of Automation of Chinese Academy of Science
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Institute of Automation of Chinese Academy of Science
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H04L1/0005Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes applied to payload information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0204Channel estimation of multiple channels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to a kind of MCS selection method and system based on 5G communication network, which includes:Calculate the snr value of all subcarriers of channel transmission;Equivalent signal-to-noise ratio value is calculated by the snr value of all subcarriers, as channel quality value;Channel quality value is compared with preset threshold, show that channel quality indicates;When carrying out data transmission next time, indicated to obtain suitable modulation system and transport block size value according to channel quality.The embodiment of the present invention by calculate each channel be transmitted across after subcarrier snr value, the snr value of all subcarriers is mapped in a value, as equivalent signal-to-noise ratio value, and corresponding channel quality is obtained by the equivalent signal-to-noise ratio value and is indicated, in subsequent communication process, the case where selecting suitable modulation system and transport block size value according to channel quality instruction, carry out adaptive channel with this improves the efficiency of transmission and guarantees the quality of transmission.

Description

A kind of MCS selection method and system based on 5G communication network
Technical field
The present invention relates to wireless technology field more particularly to a kind of MCS selection method based on 5G communication network and System.
Background technique
By configuring more antennas in base station and mobile station, the capacity of wireless communication link and reliable can be significantly improved Property.In the case where not increasing excess power, space division multiplexing generates multiple spatial data pipelines in identical frequency band, to increase Spectrum efficiency.When base station occupies it is identical when, frequency domain resource multiple data flows be sent to same user when, maximize MIMO it is wide The optimal solution for broadcasting the dynamic space division multiple access of channel capacity is the technology based on DPC, but it requires the non-of complexity at coding and decoding end Linear process needs very high computation complexity, brings challenge to current realization.
Summary of the invention
Of the existing technology in order to solve the problems, such as, at least one embodiment of the present invention provides a kind of based on 5G communication The MCS selection method of network, including:
Calculate the snr value of all subcarriers in the reference signal of channel transmission;
Equivalent signal-to-noise ratio value is calculated by the snr value of all subcarriers, as channel quality value;
The channel quality value is compared with preset threshold, show that channel quality indicates;
When carrying out data transmission next time, is indicated to carry out MCS selection according to the channel quality, obtain suitable modulation methods Formula and transport block size value.
Based on the above-mentioned technical proposal, the embodiment of the present invention can also make following improvement.
Optionally, equivalent signal-to-noise ratio value is calculated by the snr value of all subcarriers, specifically included:
The snr value of all subcarriers is mapped to a snr value, as the equivalent signal-to-noise ratio value.
Optionally, the snr value by all subcarriers is mapped to a snr value, as described equivalent Snr value specifically includes:
The snr value of all subcarriers is substituted into following mapping equation and calculates the equivalent signal-to-noise ratio value:
Wherein, SINReffFor equivalent signal-to-noise ratio value, P is the quantity of the subcarrier, SINRPFor the letter of the P subcarrier It makes an uproar ratio, β is scale factor, and exp is the exponential function that the truth of a matter is e, and e is natural constant.
Optionally, described to be compared the channel quality value with preset threshold, show that channel quality indicates, it is specific to wrap It includes:
The preset threshold includes:At least two threshold values of different sizes;
The channel quality value and all threshold values are compared respectively, the channel quality value is greater than or is waited Adjustment number is used as in the number of the threshold value;
It is indicated to obtain corresponding channel quality instruction in corresponding table from channel quality according to the adjustment number.
Optionally, the snr value for calculating all subcarriers in the reference signal that channel transmits, specifically includes:
First signal power of the subcarrier in the reference signal before obtaining channel transmission;
The second signal power of the subcarrier in the reference signal after obtaining channel transmission;
Pass through the snr value of subcarrier described in first signal power and the second signal power calculation.
The embodiment of the invention also provides a kind of, and the MCS based on 5G communication network selects system, including:Computing subsystem, Compare subsystem, selection subsystem and storage subsystem;
The computing subsystem, for calculating the snr value of all subcarriers in the reference signal that channel transmits;
The computing subsystem is also used to that equivalent signal-to-noise ratio is calculated by the snr value of all subcarriers Value, as channel quality value;
The relatively subsystem, preset threshold for that will store in the channel quality value and the storage subsystem into Row compares, and show that channel quality indicates;
The selection subsystem carries out MCS selection for indicating according to the channel quality, obtains suitable modulation system With transport block size value.
Optionally, the computing subsystem, specifically for the snr value of all subcarriers is mapped to a letter It makes an uproar ratio, as the equivalent signal-to-noise ratio value.
Optionally, the computing subsystem, specifically for the snr value of all subcarriers is substituted into following mapping Formula calculates the equivalent signal-to-noise ratio value:
Wherein, SINReffFor equivalent signal-to-noise ratio value, P is the quantity of the subcarrier, SINRPFor the letter of the P subcarrier It makes an uproar ratio, β is scale factor, and exp is the exponential function that the truth of a matter is e, and e is natural constant.
Optionally, the preset threshold stored in the storage subsystem includes:At least two thresholdings of different sizes Value;
The relatively subsystem, specifically for the channel quality value and all threshold values are compared respectively, The channel quality value is greater than or equal to the number of the threshold value as adjustment number;And according to the adjustment number from letter Road quality indicates to obtain corresponding channel quality instruction in corresponding table.
Optionally, further include:Subsystem is obtained, for obtaining the son in the reference signal before channel transmits First signal power of carrier wave;The second signal function of the subcarrier in the reference signal after obtaining channel transmission Rate;
The computing subsystem is specifically used for by described in first signal power and the second signal power calculation The snr value of subcarrier.
Above-mentioned technical proposal of the invention has the following advantages that compared with prior art:The embodiment of the present invention is every by calculating One channel be transmitted across after subcarrier snr value, the snr value of all subcarriers is mapped in a value, As equivalent signal-to-noise ratio value, and corresponding channel quality is obtained by the equivalent signal-to-noise ratio value and is indicated, in subsequent communication process, The case where selecting suitable modulation system and transport block size value according to channel quality instruction, carry out adaptive channel with this, improves letter The efficiency of road transmission and the quality for guaranteeing transmission.
Detailed description of the invention
Fig. 1 is a kind of MCS selection method flow diagram based on 5G communication network provided in an embodiment of the present invention;
Fig. 2 be another embodiment of the present invention provides a kind of MCS selection method flow diagram based on 5G communication network;
Fig. 3 is a kind of MCS selection system structure diagram based on 5G communication network that further embodiment of this invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of MCS selection method based on 5G communication network provided in an embodiment of the present invention, including:
S11, the snr value for calculating all subcarriers in the reference signal of channel transmission.
Specifically, the ratio of noise power or bit value when signal-to-noise ratio is normal signal power or bit value and no signal Value, noise signal refer to by random extra not existing in the original signal generated after the equipment, and this kind Signal does not change with the variation of original signal, by calculating the snr value of subcarrier, for indicating to transmit the subcarrier The case where channel, specifically, obtaining the first signal power of the subcarrier in the reference signal before channel transmission;It obtains through believing The second signal power of the subcarrier in reference signal after road transmission;First signal power is subtracted second signal power to make an uproar The power of acoustical signal passes through the snr value of the first signal power and second signal power calculation subcarrier.
S12, equivalent signal-to-noise ratio value is calculated by the snr value of all subcarriers, as channel quality value.
Specifically, the snr value for all subcarriers being calculated is mapped in a snr value, as equivalent Snr value, when there is larger fluctuation by the snr value that some subcarrier occurs in mapping calculation reduction, to final result It influences, improves System Fault Tolerance rate, improve computational accuracy and be optionally averaged, put down to the snr value of all subcarriers The difference of the snr value of subcarrier and average signal-to-noise ratio value is greater than the signal-to-noise ratio of the subcarrier of preset threshold by equal snr value It rejects, weeds out the subcarrier for larger fluctuation occur, reduce error.
S13, channel quality value is compared with preset threshold, show that channel quality indicates.
Specifically, CQI is the information instruction of channel quality, the quality of present channel quality and the signal-to-noise ratio of channel are represented Size is corresponding, value range 0~31.When CQI value is 0, channel quality is worst;When CQI value is 31, channel quality It is best.In embodiments of the present invention, the corresponding different threshold value of different channels quality instruction is obtained by largely emulation in advance, it will be upper The channel quality value that step obtains is stated, is compared to obtain corresponding channel quality instruction with preset threshold.
S14, when carrying out data transmission next time, according to channel quality indicate carry out MCS selection, obtain suitable modulation methods Formula and transport block size value.
Specifically, MCS, i.e. modulation and coding strategy, MCS is using the factor of influence communication speed of interest as table Column form a Speedometer Drive using MCS index as row.So each MCS index has corresponded to the object under one group of parameter in fact Manage transmission rate.In subsequent communications data transmission procedure, MCS selection is carried out according to newest obtained channel quality instruction, is obtained To the modulation system and transport block size value for meeting present channel quality, improves the efficiency of transmission and guarantee the matter of transmission Amount.
In above-described embodiment, by calculating the snr value of all subcarriers in a transmission process, and by all Equivalent signal-to-noise ratio value is calculated in the snr value of subcarrier, to indicate channel quality value, by the channel quality value and in advance If the comparison result of threshold value, corresponding channel quality instruction is obtained, feedback arrives transmitting terminal, and transmitting terminal is in subsequent data transmission process In, suitable modulation system and transport block size value are selected according to channel quality instruction, guaranteeing the case where transmitting accuracy Under, reach raising throughput of system.
In the present embodiment, channel quality value is compared with preset threshold, show that channel quality indicates, it is specific to wrap It includes:
Preset threshold includes:At least two threshold values of different sizes, specifically, different threshold value ranges corresponds to not Same channel quality instruction, threshold value is more, then smaller to the division of channel quality, final result is more accurate.
Channel quality value and all threshold values are compared respectively, channel quality value is greater than or equal to time of threshold value Number is as adjustment number;
It is indicated to obtain corresponding channel quality instruction in corresponding table from channel quality according to adjustment number;Specifically, at this In embodiment, it is greater than or equal to threshold value by being compared respectively to channel quality value with threshold value, and to channel quality value Number counted, the instruction of corresponding channel quality is obtained according to the adjustment number.
As shown in Fig. 2, the embodiment of the invention also provides a kind of MCS selection methods based on 5G communication network, including:
S21, the snr value for calculating all subcarriers in the reference signal of channel transmission.
Specifically, the ratio of noise power or bit value when signal-to-noise ratio is normal signal power or bit value and no signal Value, noise signal refer to by random extra not existing in the original signal generated after the equipment, and this kind Signal does not change with the variation of original signal, by calculating the snr value of subcarrier, for indicating to transmit the subcarrier The case where channel.
S22, the snr value of all subcarriers is substituted into following mapping equation calculating equivalent signal-to-noise ratio value:
Wherein, SINReffFor equivalent signal-to-noise ratio value, P is the quantity of subcarrier, SINRPFor the signal-to-noise ratio of the P subcarrier Value, β is scale factor, and exp is the exponential function that the truth of a matter is e, and e is natural constant.
S23, channel quality value is compared with preset threshold, show that channel quality indicates.
Specifically, CQI is the information instruction of channel quality, the quality of present channel quality and the signal-to-noise ratio of channel are represented Size is corresponding, value range 0~31.When CQI value is 0, channel quality is worst;When CQI value is 31, channel quality It is best.In embodiments of the present invention, the corresponding different threshold value of different channels quality instruction is obtained by largely emulation in advance, it will be upper The channel quality value that step obtains is stated, is compared to obtain corresponding channel quality instruction with preset threshold.
S24, when carrying out data transmission next time, according to channel quality indicate carry out MCS selection, obtain suitable modulation methods Formula and transport block size value.
Specifically, MCS, i.e. modulation and coding strategy, MCS is using the factor of influence communication speed of interest as table Column form a Speedometer Drive using MCS index as row.So each MCS index has corresponded to the object under one group of parameter in fact Manage transmission rate.In subsequent communications data transmission procedure, MCS selection is carried out according to newest obtained channel quality instruction, is obtained To the modulation system and transport block size value for meeting present channel quality, improves the efficiency of transmission and guarantee the matter of transmission Amount.
In above-described embodiment, mapping equation as above is provided, all snr values in carrier wave are mapped in a value, made For equivalent signal-to-noise ratio value, the fluctuation of the snr value of subcarrier when thus reducing channel fluctuation during transmission is to whole The influence of body calculated result improves System Fault Tolerance rate, and improves the validity of final equivalent signal-to-noise ratio value.
As shown in figure 3, the embodiment of the invention also provides a kind of, the MCS based on 5G communication network selects system, including:Meter Operator Systems compare subsystem, selection subsystem and storage subsystem.
In the present embodiment, further include:Subsystem is obtained, is carried for obtaining the son in the reference signal before channel transmits First signal power of wave;The second signal power of the subcarrier in reference signal after obtaining channel transmission;
In the present embodiment, computing subsystem, for calculating the letter of all subcarriers in the reference signal that channel transmits It makes an uproar ratio;Specifically, computing subsystem passes through the snr value of the first signal power and second signal power calculation subcarrier.
In the present embodiment, computing subsystem is also used to that equivalent letter is calculated by the snr value of all subcarriers It makes an uproar ratio, as channel quality value;Specifically, the snr value of all subcarriers is mapped to a snr value, as etc. Snr value is imitated, e.g., the snr value of all subcarriers is substituted into following mapping equation and calculates equivalent signal-to-noise ratio value:
Wherein, SINReffFor equivalent signal-to-noise ratio value, P is the quantity of subcarrier, SINRPFor the signal-to-noise ratio of the P subcarrier Value, β is scale factor, and exp is the exponential function that the truth of a matter is e, and e is natural constant.
In the present embodiment, compare subsystem, the preset threshold for will store in channel quality value and storage subsystem It is compared, show that channel quality indicates, specifically, the preset threshold stored in storage subsystem includes:At least two sizes Different threshold values;Compare subsystem to be compared channel quality value and all threshold values respectively, channel quality value is greater than Or adjustment number is used as equal to the number of threshold value;And it indicates to obtain accordingly in corresponding table from channel quality according to adjustment number Channel quality instruction.
In the present embodiment, subsystem is selected, MCS selection is carried out for indicating according to channel quality, is suitably adjusted Mode and transport block size value processed.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that:It still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features; And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and Range.

Claims (10)

1. a kind of MCS selection method based on 5G communication network, which is characterized in that including:
Calculate the snr value of all subcarriers in the reference signal of channel transmission;
Equivalent signal-to-noise ratio value is calculated by the snr value of all subcarriers, as channel quality value;
The channel quality value is compared with preset threshold, show that channel quality indicates;
When carrying out data transmission next time, according to the channel quality indicate carry out MCS selection, obtain suitable modulation system and Transport block size value.
2. MCS selection method according to claim 1, which is characterized in that pass through the snr value of all subcarriers Equivalent signal-to-noise ratio value is calculated, specifically includes:
The snr value of all subcarriers is mapped to a snr value, as the equivalent signal-to-noise ratio value.
3. MCS selection method according to claim 2, which is characterized in that the signal-to-noise ratio by all subcarriers Value is mapped to a snr value, as the equivalent signal-to-noise ratio value, specifically includes:
The snr value of all subcarriers is substituted into following mapping equation and calculates the equivalent signal-to-noise ratio value:
Wherein, SINReffFor equivalent signal-to-noise ratio value, P is the quantity of the subcarrier, SINRPFor the signal-to-noise ratio of the P subcarrier Value, β is scale factor, and exp is the exponential function that the truth of a matter is e, and e is natural constant.
4. according to MCS selection method described in previous claims 1, which is characterized in that described by the channel quality value and default Threshold value is compared, and is shown that channel quality indicates, is specifically included:
The preset threshold includes:At least two threshold values of different sizes;
The channel quality value and all threshold values are compared respectively, the channel quality value is greater than or equal to institute The number of threshold value is stated as adjustment number;
It is indicated to obtain corresponding channel quality instruction in corresponding table from channel quality according to the adjustment number.
5. MCS selection method according to any one of claims 1-4, which is characterized in that described to calculate what channel transmitted The snr value of all subcarriers, specifically includes in reference signal:
First signal power of the subcarrier in the reference signal before obtaining channel transmission;
The second signal power of the subcarrier in the reference signal after obtaining channel transmission;
Pass through the snr value of subcarrier described in first signal power and the second signal power calculation.
6. a kind of MCS based on 5G communication network selects system, which is characterized in that including:Computing subsystem, compare subsystem, Select subsystem and storage subsystem;
The computing subsystem, for calculating the snr value of all subcarriers in the reference signal that channel transmits;
The computing subsystem is also used to be calculated equivalent signal-to-noise ratio value by the snr value of all subcarriers, makees For channel quality value;
The relatively subsystem, for comparing the preset threshold stored in the channel quality value and the storage subsystem Compared with, obtain channel quality indicate;
The selection subsystem carries out MCS selection for indicating according to the channel quality, obtains suitable modulation system and biography Defeated block size value.
7. MCS according to claim 6 selects system, which is characterized in that the computing subsystem, specifically for that will own The snr value of the subcarrier is mapped to a snr value, as the equivalent signal-to-noise ratio value.
8. MCS according to claim 7 selects system, which is characterized in that the computing subsystem, specifically for that will own The snr value of the subcarrier substitutes into following mapping equation and calculates the equivalent signal-to-noise ratio value:
Wherein, SINReffFor equivalent signal-to-noise ratio value, P is the quantity of the subcarrier, SINRPFor the signal-to-noise ratio of the P subcarrier Value, β is scale factor, and exp is the exponential function that the truth of a matter is e, and e is natural constant.
9. MCS according to claim 6 selects system, which is characterized in that is stored in the storage subsystem is described pre- If threshold value includes:At least two threshold values of different sizes;
The relatively subsystem, specifically for the channel quality value and all threshold values to be compared respectively, by institute Number of the channel quality value more than or equal to the threshold value is stated as adjustment number;And according to the adjustment number from channel matter Amount indicates to obtain corresponding channel quality instruction in corresponding table.
10. selecting system according to the MCS any in claim 6-9, which is characterized in that further include:Subsystem is obtained, is used In the first signal power for obtaining the subcarrier in the reference signal before channel transmission;After obtaining channel transmission The reference signal in the subcarrier second signal power;
The computing subsystem is specifically used for carrying by son described in first signal power and the second signal power calculation The snr value of wave.
CN201810367461.0A 2018-04-23 2018-04-23 A kind of MCS selection method and system based on 5G communication network Pending CN108880745A (en)

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CN112383367A (en) * 2020-11-16 2021-02-19 杭州电子科技大学上虞科学与工程研究院有限公司 Method and device for selecting MCS (modulation and coding scheme) of simultaneous co-frequency full duplex system
CN112383367B (en) * 2020-11-16 2022-05-20 杭州电子科技大学上虞科学与工程研究院有限公司 MCS (modulation and coding scheme) selection method and device for simultaneous co-frequency full duplex system
CN114629757A (en) * 2020-12-14 2022-06-14 中国科学院上海高等研究院 Modulation strategy selection method, system, storage medium and terminal for non-orthogonal transmission
CN114629757B (en) * 2020-12-14 2023-03-21 中国科学院上海高等研究院 Modulation strategy selection method, system, storage medium and terminal for non-orthogonal transmission
WO2022227061A1 (en) * 2021-04-30 2022-11-03 华为技术有限公司 Resource configuration method and related device
CN114285482A (en) * 2021-12-28 2022-04-05 武汉光谷信息光电子创新中心有限公司 Method, device, equipment and storage medium for determining modulation mode
CN114285482B (en) * 2021-12-28 2023-09-05 武汉光谷信息光电子创新中心有限公司 Method, device, equipment and storage medium for determining modulation mode

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Application publication date: 20181123