CN113922925A - Processing method, base station and storage medium for data transmission modulation grade - Google Patents

Processing method, base station and storage medium for data transmission modulation grade Download PDF

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Publication number
CN113922925A
CN113922925A CN202111176131.1A CN202111176131A CN113922925A CN 113922925 A CN113922925 A CN 113922925A CN 202111176131 A CN202111176131 A CN 202111176131A CN 113922925 A CN113922925 A CN 113922925A
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data transmission
modulation
modulation level
value
base station
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CN113922925B (en
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张力方
胡泽妍
赵雪聪
程奥林
张伟强
冯毅
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application provides a processing method of data transmission modulation grade, a base station and a storage medium, wherein the method comprises the following steps: receiving a hybrid automatic repeat request (HARQ) result of the mth data transmission in a Channel Quality Indicator (CQI) feedback interval; performing accumulated correction calculation processing on the HARQ results of the mth data transmission and the previous n data transmissions to obtain a modulation level stepping value corresponding to the (m +1) th data transmission; adding the modulation grade stepping value corresponding to the (m +1) th data transmission with the modulation grade corresponding to the (m +1) th data transmission to obtain a modulation value corresponding to the (m +1) th data transmission; determining whether the modulation value corresponding to the (m +1) th data transmission reaches a preset adjustment rule, if so, adjusting the modulation level according to the modulation value corresponding to the (m +1) th data transmission, and performing the (m +1) th data transmission according to the adjusted modulation level; wherein n and m are natural numbers, 0 is more than m, and n is more than m.

Description

Processing method, base station and storage medium for data transmission modulation grade
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a method, a base station, and a storage medium for processing a data transmission modulation level.
Background
In the data transmission process of a wireless communication system, a wireless transmission channel is a multipath fading and random time-varying channel, and the time-varying characteristic of the channel directly affects the transmission efficiency of data. Therefore, in actual data transmission, the base station needs to adaptively adjust the data modulation level according to the change of the wireless channel to improve the data transmission rate of the system, thereby improving the frequency band utilization rate.
In the conventional method for adaptively adjusting the data Modulation level, a base station selects a Modulation level corresponding to a Channel Quality Indicator (CQI) fed back periodically by a user equipment (ue) from a Modulation and Coding Scheme (MCS) set. Meanwhile, in the CQI feedback interval between every two times of CQI feedback, in order to further track the channel state and improve the data transmission throughput and the spectrum efficiency, the base station performs equal-step increase and decrease processing on the modulation grade determined based on the received CQI according to the Hybrid Automatic Repeat request (HARQ) result fed back by the user terminal in real time, once the preset grade adjustment rule is met, the modulation grade is immediately adjusted until the next CQI is reached, and the modulation grade is adjusted again.
In the conventional method for adaptively adjusting the data modulation level, the modulation level adjustment mode performed in the CQI feedback interval is not accurate, which leads to data transmission failure and increased retransmission times.
Disclosure of Invention
The application provides a processing method, a base station and a storage medium for data transmission modulation grade, which aim to solve the problem that the modulation grade adjustment mode performed in a CQI feedback interval in the prior art is not accurate.
In a first aspect, the present application provides a method for processing a modulation level for data transmission, including:
receiving a hybrid automatic repeat request (HARQ) result of the mth data transmission in a Channel Quality Indicator (CQI) feedback interval;
performing accumulated correction calculation processing on the HARQ results of the mth data transmission and the previous n data transmissions to obtain a modulation level stepping value corresponding to the (m +1) th data transmission;
adding the modulation grade stepping value corresponding to the (m +1) th data transmission with the modulation grade corresponding to the (m +1) th data transmission to obtain a modulation value corresponding to the (m +1) th data transmission;
determining whether the modulation value corresponding to the (m +1) th data transmission reaches a preset adjustment rule, if so, adjusting the modulation level according to the modulation value corresponding to the (m +1) th data transmission, and performing the (m +1) th data transmission according to the adjusted modulation level;
wherein n and m are natural numbers, 0 is more than m, and n is more than m.
In a second aspect, the present application provides a base station, comprising:
a processor and a memory;
the memory stores the processor-executable instructions;
wherein the processor executes the executable instructions stored in the memory to cause the processor to execute the processing method of the data transmission modulation class as described above.
In a third aspect, the present application provides a storage medium having stored therein computer-executable instructions for implementing the processing method for data transmission modulation classes as described above when executed by a processor.
According to the processing method, the base station and the storage medium for the data transmission modulation grade, the modulation grade stepping value corresponding to each data transmission is subjected to accumulated correction calculation, the obtained modulation grade stepping value can reflect the change trend and the amplitude of the channel quality state in the CQI feedback interval more accurately, and the channel quality state in the CQI feedback interval is tracked more accurately. The modulation grade obtained by calculation based on the modulation grade stepping value is more in line with the channel quality state, the probability of data transmission failure is reduced, and the data transmission efficiency and the spectrum resource utilization rate of the wireless communication system are greatly improved. The method and the device solve the problem that the modulation grade adjustment mode performed in the CQI feedback interval is not accurate in the prior art.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a block diagram of a system for processing a modulation level for data transmission according to an embodiment of the present disclosure;
fig. 2 is a first flowchart of a method for processing a modulation class of data transmission according to an embodiment of the present disclosure;
fig. 3 is a flowchart of a processing method for data transmission modulation classes according to an embodiment of the present application;
fig. 4 is a structural diagram of a base station according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 embodiments of the present invention, but not all embodiments. 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 application.
The method for processing the data transmission modulation grade is mainly used in a wireless communication system. Fig. 1 is a block diagram of a system for processing a modulation level for data transmission according to an embodiment of the present disclosure. As shown in fig. 1, a system for processing a modulation level for data transmission includes: a base station 11 and a user terminal 13. The user terminal 13 may be a mobile phone terminal of a user, or may be a vehicle-mounted terminal or any terminal that performs wireless communication with the base station 11, and the embodiment is not limited in this embodiment.
Specifically, during signal modulation transmission, the user terminal 13 periodically feeds back CQI to the base station 11, and the base station 11 determines the modulation level of data transmission according to the fed back CQI. The base station 11 modulates the signal to be transmitted according to the determined parameter corresponding to the modulation level, and then transmits the signal data to be transmitted to the user terminal 13. After the base station 11 sends a data packet to the ue 13 each time, the ue 13 will feed back the HARQ result of each data transmission to the base station 11. Specifically, each time the base station 11 sends a data packet to the user terminal 13, the user terminal 13 sends an Acknowledgement (ACK) or Negative Acknowledgement (NACK) flag in HARQ to the base station 11. If the base station 11 receives the NACK flag sent by the user terminal 13, it indicates that the HARQ result of the last data transmission fed back by the user terminal 13 is retransmission, and the base station 11 needs to retransmit the data packet of the last data transmission to the user terminal 13. If the base station 11 receives the ACK flag sent by the user terminal 13, it indicates that the HARQ result of the last data transmission fed back by the user terminal 13 is correct, and the base station 11 continues to transmit a new data packet to the user terminal 13.
The user terminal 13 feeds back the CQI to the base station 11 periodically, and the base station 11 tracks the channel quality status periodically according to the CQI fed back periodically. The base station 11 determines the modulation level corresponding to the channel quality state for data transmission through the CQI fed back periodically, thereby ensuring the transmission efficiency of data transmission in the communication system. However, with respect to the time-varying characteristic of the wireless channel, the time-varying channel quality state cannot be tracked by the CQI in the CQI feedback interval between every two CQI feedbacks.
In contrast, in the prior art, a method of adaptively adjusting a data modulation level is adopted, so that a channel state in a CQI feedback interval is further tracked, and data transmission throughput and spectral efficiency are improved. Specifically, the base station 11 selects a modulation level corresponding to the fed back CQI from a Modulation and Coding Scheme (MCS) set according to the CQI periodically fed back by the user terminal. Then, in the CQI feedback interval, the base station 11 performs equal-step increase/decrease processing on the modulation level determined based on the received CQI for the HARQ result fed back in real time by the user terminal 13. Once the modulation level after the equal step size increase/decrease processing satisfies the preset adjustment rule, the base station 11 immediately adjusts the modulation level, and adjusts the modulation level again until the next CQI arrives.
In the CQI feedback interval, the base station 11 adjusts a modulation value corresponding to the next data transmission based on the ACK/NACK flag sent by the user terminal 13 in real time after the last data transmission according to the following formula 1. Then, the base station 11 rounds the modulation value M down to obtain the modulation level MCS for each data transmission. Wherein, the modulation value M corresponding to the first data transmission after CQI feedback1Modulation level MCS corresponding to first data transmission after CQI feedback1I.e. M1＝MCS1. The modulation level MCS1 corresponding to the first data transmission after CQI feedback is directly and correspondingly selected and determined by the base station 11 from a Modulation and Coding Scheme (MCS) set according to the CQI value.
Specifically, equation 1 is as follows:
Figure BDA0003295138970000041
wherein N ismThe cumulative transmission times of the data packets for the mth data transmission is δ a preset step value.
Equation 1 is illustrated as follows:
suppose δ is 0.23, when the first data transmission is in modulation level MCS1After completing data transmission, the base station 11 receives ACK;
the base station 11 calculates the modulation value MCS corresponding to the second data transmission27.23, modulation level MCS corresponding to the second data transmission2＝[M2]7, wherein [ x]Indicating rounding down the value x. So base station 11 adopts modulation level MCS2The second data transmission is performed 7. After the second data transmission, the base station 11 receives the ACK.
The base station 11 calculates a modulation value M corresponding to the third data transmission37.46, modulation level MCS corresponding to the third data transmission3＝[M3]7. So base station 11 adopts modulation level MCS3The third data transmission is carried out 7. After the third data transmission, the base station 11 receives the ACK.
Similarly, the base station 11 receives ACK after the fourth and fifth data transmissions.
The base station 11 calculates a modulation value M corresponding to the sixth data transmission6＝8.15，MCS6＝[M6]8. So base station 11 adopts modulation level MCS6The sixth data transmission is performed 8. After the sixth data transmission, the base station 11 receives the ACK.
The base station 11 calculates the modulation value M corresponding to the seventh data transmission7＝8.38，MCS7＝[M7]8. Base station 11 adopts modulation level MCS7The seventh data transmission is carried out 8. After the seventh data transmission, the base station 11 receives NACK.
Thus, according to equation 1, since M7-N7δ＝8.38-1×0.23＝8.15，MCS7＝8，(M7-N7δ)≥MCS7Then the base station 11 calculates the modulation value M corresponding to the eighth data transmission8＝M7-N7δ＝8.15，MCS8＝[M8]8. Base station 11 adopts modulation level MCS8The eighth data transmission is performed 8. However, the base station 11 also receives NACK after the eighth data transmission.
Then, according to equation 1, since M8-N8δ＝8.15-2×0.23＝7.69，MCS8＝8，(M7-N7δ)＜MCS7Then the base station 11 calculates the modulation value M corresponding to the ninth data transmission9＝MCS8-1＝7，MCS9＝[M9]7. Base station 11 adopts modulation level MCS9The ninth data transmission is performed 7. However, the base station 11 also receives NACK after the ninth data transmission. It can be seen that, according to prior art equation 1, (M) ism-Nmδ)＜MCSmThen, the modulation value for the ninth data transmission is directly reduced to 7 by a large amplitude from 8.15 for the eighth data transmission.
Then, the base station 11 calculates the modulation value M corresponding to the tenth data transmission10＝7-0.23＝6.77，MCS10＝[M10]6. Base station 11 adopts modulation level MCS10The tenth data transmission is performed 6. After the tenth data transmission, the base station 11 receives the ACK and another CQI value, and the modulation level determined according to the CQI value is 10. Next, the base station 11 performs the next data transmission with the modulation class 10 and receives ACK.
Therefore, in the prior art, the base station 11 further tracks the channel quality state in the CQI feedback interval by using the modulation value of each data transmission, and obtains the modulation level corresponding to the data transmission by rounding the modulation value. However, when calculating the modulation value for each data transmission, the base station 11 mainly increases or decreases the modulation value for the last data transmission by a fixed step δ to obtain the modulation value for each data transmission, and further obtain the corresponding modulation level. When the channel quality is continuously deteriorated, the base station 11 directly performs a large degradation process on the modulation value corresponding to the last data transmission according to formula 1 in the prior art, and accordingly, the modulation class also performs a continuous degradation process, so that the efficiency of system data transmission is greatly reduced. Therefore, when the channel quality state is good, the capability of tracking the time variation of the channel according to the modulation value calculated by the equal step length is weak, and the high-efficiency transmission of the wireless system to the data is limited; when the channel quality is poor, the modulation value is adjusted and reduced according to a fixed step length or a large amplitude reduction type, so that the modulation grade corresponding to the obtained modulation value is not in accordance with the channel quality state, the modulation grade of data transmission is far lower than the modulation grade supported by the channel, and the data transmission efficiency and the spectrum utilization rate of the wireless communication system are greatly reduced.
Therefore, for the problem that the modulation level adjustment mode performed in the CQI feedback interval is not accurate in the conventional method for adaptively adjusting the data modulation level, the present application provides a method for processing the data transmission modulation level to solve the problems in the prior art.
The processing method for the data transmission modulation level mainly aims at further improvement and optimization of a modulation level adjustment mode in a CQI feedback interval.
Specifically, as shown in fig. 1, the base station 11 selects a modulation level MCS corresponding to the fed back CQI from a Modulation and Coding Scheme (MCS) set according to the CQI periodically fed back by the user terminal1. Then, in the CQI feedback interval, when the base station 11 performs data transmission on the signal to be transmitted for the first time, the MCS is adjusted according to the modulation level1The corresponding parameters are signal modulated and then the modulated signal data is transmitted to the user terminal 13. The user terminal 13 then sends an ACK or NACK in HARQ to the base station. Specifically, each time the base station 11 transmits data, the user terminal 13 feeds back the HARQ result to the base station 11.
In the CQI feedback interval between two CQI feedbacks, the base station 11 calculates a modulation value corresponding to each data transmission to determine an adjustment of a modulation level corresponding to each data transmission. Specifically, after the base station 11 receives the HARQ result of the mth data transmission, the base station 11 performs cumulative correction calculation on the HARQ result of the mth data transmission and the HARQ result of the previous n data transmissions, and obtains a modulation level step value corresponding to the m +1 th data transmission. Wherein n and m are natural numbers, 0 is more than m, and n is more than m. The calculation processing mode of the accumulative correction enables the modulation grade stepping value of each data transmission to change along with the change of the channel quality state fed back by the HARQ result of the previous data transmission, and breaks through the fixed amplitude limit of the fixed stepping value on the channel quality state tracking.
Then, the base station 11 adds the modulation level step value corresponding to the m +1 th data transmission to the modulation level corresponding to the m +1 th data transmission to obtain the modulation value corresponding to the m +1 th data transmission. Then, the base station 11 determines whether the modulation value corresponding to the m +1 th data transmission reaches a preset adjustment rule. If the base station 11 determines that the modulation value corresponding to the (m +1) th data transmission reaches the preset adjustment rule, the modulation level is adjusted according to the modulation value corresponding to the (m +1) th data transmission, so that the (m +1) th data transmission is performed according to the adjusted modulation level. On the contrary, if the base station 11 determines that the modulation value corresponding to the m +1 th data transmission does not reach the preset adjustment rule, the modulation level is kept unchanged, and the m +1 th data transmission is still performed by using the modulation level corresponding to the m +1 th data transmission.
In the method for processing the modulation level for data transmission provided in the embodiment of the present application, in the CQI feedback interval, the modulation level step value corresponding to each data transmission is not a fixed step size, but is obtained by performing cumulative correction calculation according to the HARQ result of the previous data transmission. According to the method for processing the modulation grade of the data transmission, which is provided by the embodiment of the application, the obtained modulation grade stepping value can reflect the change trend and the amplitude of the channel quality state in the CQI feedback interval more accurately by performing accumulated correction calculation on the modulation grade stepping value corresponding to each data transmission. Further, the channel quality state of data transmission in the CQI feedback interval can be tracked more accurately. The modulation grade obtained by calculation based on the modulation grade stepping value is more in line with the channel quality state, the probability of data transmission failure is reduced, and the data transmission efficiency and the spectrum resource utilization rate of the wireless communication system are greatly improved.
Fig. 2 is a flowchart of a first method for processing a data transmission modulation level according to an embodiment of the present application, and fig. 2 is a flowchart for explaining in detail a method for processing a data transmission modulation level according to the present application on the basis of fig. 1. As shown in fig. 2, the method includes:
s201, receiving a hybrid automatic repeat request (HARQ) result of mth data transmission in a Channel Quality Indicator (CQI) feedback interval;
specifically, the base station 11 selects a modulation level MCS corresponding to the fed-back CQI from the MCS set according to the channel quality indicator CQI periodically fed back by the user terminal1. The modulation level MCS1Is the initial reference for the modulation level adjustment corresponding to each data transmission in the subsequent CQI feedback interval. In the CQI feedback interval, the base station 11 treats the transmission signal for the first timeWhen data transmission is carried out according to the modulation level MCS1The corresponding parameters are signal modulated and then the modulated signal data is transmitted to the user terminal 13. Next, the user terminal 13 feeds back a hybrid automatic repeat request (HARQ) result to the base station 11. Specifically, the user terminal 13 sends an ACK or NACK flag to the base station according to the data result transmitted by the base station 11. Further, the ACK flag indicates that the HARQ result of the data transmission from the base station 11 to the user terminal 13 is correct; conversely, the NACK flag indicates that the HARQ result of the data transmitted from the base station 11 to the user terminal 13 is retransmission, that is, the data packet transmitted last time needs to be retransmitted in the next data transmission. Specifically, each time the base station 11 transmits data to the user terminal 13, the user terminal 13 sends an ACK or NACK flag to the base station 11. The base station 11 receives and stores the ACK or NACK flag sent by the user terminal 13 after each data transmission.
In the CQI feedback interval, after the base station 11 receives the HARQ result of the mth data transmission, the modulation level step value corresponding to the (m +1) th data transmission is determined according to the following step S202.
S202, carrying out accumulated correction calculation processing on the HARQ results of the m-th data transmission and the previous n-th data transmission to obtain a modulation grade stepping value corresponding to the m + 1-th data transmission;
specifically, the base station 11 performs cumulative correction calculation on the HARQ result of the mth data transmission and the HARQ results of n consecutive data transmissions that are the same as the HARQ result of the mth data transmission, and obtains a modulation level step value corresponding to the m +1 th data transmission.
Specifically, the base station 11 calculates HARQ result accumulation probability for the HARQ result of the mth data transmission and the HARQ result of the previous n consecutive data transmissions that is the same as the HARQ result of the mth data transmission, so as to obtain an adjustment coefficient corresponding to the (m +1) th data transmission. Then, the base station 11 performs correction calculation based on the modulation level step value corresponding to the mth data transmission by using the adjustment coefficient, and obtains a modulation level step value corresponding to the (m +1) th data transmission.
Next, according to the modulation level step value corresponding to the m +1 th data transmission obtained in this step, the following step S203 is adopted to determine the modulation value corresponding to the m +1 th data transmission.
S203, adding the modulation grade stepping value corresponding to the (m +1) th data transmission and the modulation grade corresponding to the (m +1) th data transmission to obtain a modulation value corresponding to the (m +1) th data transmission;
specifically, the base station 11 adds the modulation level step value corresponding to the m +1 th data transmission determined in step S202 to the modulation level corresponding to the m +1 th data transmission, so as to obtain the modulation value corresponding to the m +1 th data transmission.
And the modulation value corresponding to the m +1 th data transmission is obtained by performing probability calculation on the HARQ result of the previous m data transmissions and performing correction calculation on the basis of the modulation grade corresponding to the m-th data transmission. Therefore, the modulation value corresponding to the (m +1) th data transmission can more accurately reflect the channel quality state during the (m +1) th data transmission, and a foundation is laid for the accuracy of the adjustment of the modulation grade corresponding to the data transmission according to the modulation value.
In addition, the modulation value corresponding to the m +1 th data transmission is obtained by adding the modulation level stepping value corresponding to the m +1 th data transmission and the modulation level corresponding to the m-th data transmission. Therefore, the calculation mode of the modulation value corresponding to the (m +1) th data transmission avoids the problem that when the channel quality state is poor in the prior art, the subsequent modulation level is far lower than the modulation level which can be supported by the channel quality state because the previous modulation value is directly adjusted in a large-amplitude spanning manner.
After determining the modulation value corresponding to the m +1 th data transmission according to this step, the base station 11 determines, according to the modulation value, whether the m +1 th data transmission needs to be performed with modulation level adjustment and then performs data transmission or maintains the modulation level of the m-th data transmission for performing data transmission according to the following step S204.
S204, determining whether the modulation value corresponding to the (m +1) th data transmission reaches a preset adjustment rule, if so, adjusting the modulation level according to the modulation value corresponding to the (m +1) th data transmission, and performing the (m +1) th data transmission according to the adjusted modulation level.
Specifically, the base station 11 performs mapping processing on the modulation value corresponding to the m +1 th data transmission determined in the previous step, and obtains the modulation level corresponding to the modulation value. Then, the base station 11 compares the modulation level corresponding to the m +1 th data transmission with the modulation level corresponding to the m th data transmission, and determines whether the modulation level corresponding to the m +1 th data transmission needs to be adjusted according to the following adjustment rule:
if the comparison result is different, adjusting the modulation grade corresponding to the m +1 th data transmission, and performing the m +1 th data transmission according to the modulation grade corresponding to the m +1 th data transmission;
if the comparison result is the same, the modulation grade corresponding to the m +1 th data transmission is not required to be adjusted, and the m +1 th data transmission is still performed according to the modulation grade corresponding to the m +1 th data transmission, so that the time delay caused by the adjustment of the modulation grade is avoided.
The method for processing the modulation level for data transmission provided by the embodiment of the application uses the modulation level MCS corresponding to the fed back CQI1And performing probability calculation on the HARQ result of m times of data transmission before the m +1 th time of data transmission in a CQI feedback interval, and performing correction calculation on the modulation level corresponding to the m +1 th time of data transmission by using the probability calculation result on the basis of the modulation level corresponding to the m-th time of data transmission. And finally determining the adjustment of the modulation level corresponding to the (m +1) th data transmission based on the modulation level stepping value corresponding to the (m +1) th data transmission. The method for processing the data transmission modulation grade realizes accurate tracking of the channel quality state in the CQI feedback interval, and further determines a more accurate modulation grade of each data transmission in the CQI feedback interval so as to transmit data. The method for processing the modulation grade of data transmission provided by the embodiment of the application avoids the problem that the modulation grade is far lower than the modulation grade supported by the channel quality state when the channel quality state is continuously deteriorated in the CQI feedback interval.
For further explanation of the processing method of the data transmission modulation level provided in the present application, fig. 3 shows another embodiment of the processing method of the data transmission modulation level provided in the present application.
Fig. 3 is a flow chart of a processing method of a data transmission modulation class according to an embodiment of the present application, and fig. 3 is a flowchart of a processing method of a data transmission modulation class according to the present application, which is further described on the basis of the embodiment shown in fig. 2. As shown in fig. 3, the method includes:
s301, receiving a hybrid automatic repeat request (HARQ) result of the mth data transmission in a Channel Quality Indicator (CQI) feedback interval;
specifically, a specific implementation manner of this step is similar to the specific implementation manner of step S201 in the embodiment shown in fig. 2, and this embodiment is not described herein again.
S302, calculating the HARQ results of the mth data transmission and the previous N data transmissions which are the same as the HARQ results of the mth data transmission and are continuous to the previous HARQ results, and obtaining an adjustment coefficient of the (m +1) th data transmission;
specifically, the base station 11 performs HARQ for the mth data transmission and HARQ for n consecutive data transmissions that are the same as the previous HARQ for the mth data transmission according to formula Km+1Determining an adjustment coefficient K of the (m +1) th data transmission as (n +1)/(m +1)m+1；
Wherein, K1＝0。
Specifically, if the base station 11 receives the ACK flag in the HARQ corresponding to the mth data transmission after the mth data transmission, the ACK flag before the mth data transmission and consecutive to the mth data transmission is cumulatively calculated, and if the calculated number of the ACK flags is n, the adjustment coefficient K of the (m +1) th data transmission is calculated as the adjustment coefficient Km+1＝(n+1)/(m+1)；
Similarly, if the base station 11 receives the NACK flag in the HARQ corresponding to the mth data transmission after the mth data transmission, the NACK flag before the mth data transmission and consecutive to the mth data transmission is accumulated, and if the calculated NACK flag number is n, the adjustment coefficient K of the (m +1) th data transmission is calculatedm+1＝(n+1)/(m+1)；
The above adjustment coefficient reflects the probability of the same HARQ result of the mth data transmission after the mth +1 data transmission, i.e. the probability of the channel quality state when the channel of the mth +1 data transmission maintains the mth data transmission. The adjustment coefficient is used for correction calculation of a modulation value corresponding to the m +1 th data transmission, and higher accuracy of tracking the time-varying channel quality state by the obtained adjustment value is ensured.
S303, calculating an adjustment coefficient and a preset step value based on the HARQ result of the mth data transmission to obtain a modulation grade step value corresponding to the (m +1) th data transmission;
specifically, the HARQ result includes correct and retransmission, specifically, the ACK flag received by the base station 11 in HARQ indicates that the HARQ result of the data transmission is correct, and the NACK flag received by the base station 11 in HARQ indicates that the HARQ result of the data transmission is retransmission.
If the HARQ result of the mth data transmission is correct, that is, the base station 11 receives the ACK identifier after the mth data transmission, it indicates that the current channel quality state is better, and the current channel may support a modulation level higher than the modulation level of the mth data transmission. On the contrary, if the HARQ result of the mth data transmission is retransmission, that is, the base station 11 receives the NACK after the mth data transmission, it indicates that the current channel quality state is poor, and the current channel does not support the modulation level of the mth data transmission. Therefore, in order to improve the data transmission efficiency of the wireless communication system, the modulation level can be adjusted according to different HARQ results of the mth data transmission, so as to obtain a modulation level which is in accordance with the channel quality state during the (m +1) th data transmission, and perform the (m +1) th data transmission.
Specifically, if the HARQ result of the mth data transmission is correct, the formula θ is adoptedm+1＝θm+(1+Km+1) Determining modulation grade stepping value theta corresponding to the m +1 th data transmission by multiplying deltam+1(ii) a The modulation level step value thetam+1By adjusting the coefficient Km+1And performing correction calculation. At this time, the modulation level step value θ corresponding to the m +1 th data transmissionm+1Modulation grade stepping value theta corresponding to mth data transmissionmIs higher than (1+ K)m+1) Amplitude of x δ. The result of the HARQ of the mth data transmission is correct, which indicates the mth data transmission timeThe track quality status is better. And the probability of the m +1 th data transmission being correct is Km+1Therefore, on the basis of the modulation level stepping value corresponding to the mth data transmission, the modulation level stepping value theta corresponding to the m +1 th data transmission is carried out subsequentlym+1The step-up amplitude is higher than a fixed step delta by Km+1Amplitude of x δ.
If the HARQ result of the mth data transmission is retransmission, the formula theta is adoptedm+1＝θm-(1+Km+1) Determining modulation grade stepping value theta corresponding to the m +1 th data transmission by multiplying deltam+1(ii) a Since the HARQ result of the mth data transmission is retransmission, it indicates that the channel quality state is poor at the mth data transmission. And the probability of the m +1 th data transmission retransmission is Km+1So that the modulation level step value theta corresponding to the mth data transmissionmBased on the modulation level step value theta corresponding to the m +1 th data transmissionm+1The modulation and reduction amplitude of the step is higher than a fixed step delta by Km+1Amplitude of x δ.
Wherein, thetamIs the modulation level step value, K, corresponding to the mth data transmissionm+1Is the adjustment coefficient of the (m +1) th data transmission, delta is the preset step value, theta1＝0。
S304, adding the modulation grade stepping value corresponding to the m +1 th data transmission and the modulation grade corresponding to the m +1 th data transmission to obtain a modulation value corresponding to the m +1 th data transmission;
specifically, after determining the modulation level step value corresponding to the m +1 th data transmission through step S303, the base station 11 steps the modulation level step value θ corresponding to the m +1 th data transmissionm+1Modulation level MCS corresponding to mth data transmissionmAdding to obtain modulation value M corresponding to the M +1 th data transmissionm+1. The modulation value Mm+1The modulation grade step value after the modulation grade of the last data transmission and the channel quality probability value of the current channel quality state maintaining the last data transmission are corrected is included. The modulation value can more accurately track the time-varying channel quality state.
S305, mapping the modulation value corresponding to the (m +1) th data transmission to obtain a modulation grade corresponding to the modulation value;
specifically, the modulation levels of the Modulation and Coding Schemes (MCS) used by the base station 11 for data transmission are all integers, and the modulation value corresponding to each data transmission determined by the base station 11 through the above steps is a real number. Therefore, the base station 11 needs to transmit the corresponding modulation value M for the M +1 th data transmissionm+1Mapping processing is carried out to obtain a modulation value Mm+1Corresponding modulation level MCSm+1。
Specifically, the base station 11 may modulate the M +1 th data transmission by the M +1 th modulation value Mm+1Directly rounding down, and taking the rounded value as the corresponding modulation level MCSm+1。
Alternatively, the base station 11 may modulate the M +1 th data transmission by the M +1 th modulation value Mm+1Rounding down or rounding up according to decimal place preset threshold value, and taking the rounded rounding value as corresponding modulation level MCSm+1。
S306, comparing the modulation grade corresponding to the (m +1) th data transmission with the modulation grade corresponding to the m-th data transmission, and determining the adjustment of the modulation grade according to the following comparison result: if the comparison result is different, adjusting the modulation grade, and performing data transmission for the (m +1) th time according to the modulation grade corresponding to the (m +1) th time data transmission; if the comparison result is the same, the modulation grade does not need to be adjusted, and the data transmission of the (m +1) th time is still carried out according to the modulation grade corresponding to the data transmission of the (m) th time;
specifically, after obtaining the modulation level corresponding to the m +1 th data transmission in step S305, the base station 11 transmits the modulation level MCS corresponding to the m +1 th data transmissionm+1Modulation level MCS corresponding to mth data transmissionmAnd comparing, and determining the adjustment of the modulation level according to the comparison result as follows:
if, MCSm+1≠MCSmIf the comparison result is different, the modulation level is adjusted, and the base station 11 transmits the corresponding modulation level MCS according to the m +1 th datam+1Carrying out data transmission for the (m +1) th time;
if, MCSm+1＝MCSmI.e. the comparison result is the same, no modulation or the like is necessaryThe level is adjusted, and the base station 11 still transmits the corresponding modulation level MCS according to the m-th data transmissionmAnd (5) carrying out data transmission for the (m +1) th time.
Further, in order to specifically exemplify a processing method of a data transmission modulation level provided in the embodiment of the present application, the following describes the processing method of the data transmission modulation level provided in the present application based on the specific examples provided in the embodiment of the present application shown in table 1. As shown in table 1, the specific parameters after processing the modulation level of data transmission in the CQI feedback interval by using the method for processing the modulation level of data transmission according to the embodiment shown in fig. 3 are as follows:
table 1 specific examples provided in the examples of the present application
Figure BDA0003295138970000131
Specifically, as shown in table 1, the preset step value δ of a certain channel of the wireless communication system is equal to 0.2. The base station 11 receives the CQI value CQIa fed back by the user terminal 13 and determines MCS according to the CQIa1The modulation order is 7. After receiving the CQIa, the base station 11 modulates the signal to be transmitted by using the parameter corresponding to the modulation class 7 for the first data transmission, so as to perform data transmission. After the first data transmission, the base station 11 receives the ACK flag fed back by the user terminal 13.
Before the base station 11 performs the second data transmission, the base station 11 performs the second data transmission according to the above step S302 and formula Km+1The adjustment factor for the second data transmission is calculated as (n +1)/(m +1), where m is 1 and n is 0, and K is calculated21/2; next, the base station 11 performs step S303 and formula θ according to the ACK flag corresponding to the first data transmissionm+1＝θm+(1+Km+1) Calculating the modulation grade stepping value corresponding to the second data transmission by the multiplying factor delta to obtain theta2＝θ1+(1+K2) X δ is 0+ (1+1/2) × 0.2 is 0.3; next, the base station 11 calculates a modulation value M corresponding to the second data transmission in step S3042＝MCS1+θ27.3; base station 11 rounds the modulation value 7.3 directly down in step S305Obtain the corresponding modulation level, i.e. MCS, after the mapping process2＝[M2]＝[7.3]7; finally, the base station 11 sets the MCS in step S3062And MCS1Comparing the MCS with the MCS2＝MCS1No modulation level adjustment is required. Thereby, the base station 11 determines to perform the second data transmission with the modulation class 7 of the first data transmission. After the second data transmission, the base station 11 receives the ACK flag fed back by the user terminal 13.
Similarly, before the third data transmission, the base station 11 calculates K3＝2/3，θ3＝0.567，M3＝7.567，MCS37 and MCS3＝MCS2No modulation level adjustment is required. Thereby, the base station 11 determines to perform the third data transmission with the modulation class 7. After the third data transmission, the base station 11 receives the ACK flag fed back by the user terminal 13.
Similarly, base station 11 calculates K before the fourth data transmission4＝3/4，θ4＝0.867，M4＝7.867，MCS47 and MCS4＝MCS3No modulation level adjustment is required. Thereby, the base station 11 determines to perform the fourth data transmission with the modulation class 7. After the fourth data transmission, the base station 11 receives the NACK flag fed back by the user terminal 13.
Similarly, before the fifth data transmission, the base station 11 calculates K51/5, according to step S303 and formula thetam+1＝θm-(1+Km+1) Calculating theta by multiplying delta according to the modulation level stepping value corresponding to the fifth data transmission5＝θ4- (1+ K5) × δ 0.627, and M is calculated5＝7.62，MCS57 and MCS5＝MCS4No modulation level adjustment is required. Thus, base station 11 determines to perform the fifth data transmission using modulation class 7. After the fifth data transmission, the base station 11 receives the NACK flag fed back by the user terminal 13.
...；
Similarly, before the ninth data transmission, the base station 11 calculates K9＝3/9，θ9＝1.106，M9＝8.106，MCS98, and MCS9≠MCS8And adjusting the modulation level corresponding to the ninth data transmission. Thus, base station 11 determines to adopt the MCS9Modulation class 8 performs the ninth data transmission. After the ninth data transmission, the base station 11 receives the ACK flag fed back by the user terminal 13.
Similarly, before the tenth data transmission, the base station 11 calculates K10＝1/10，θ10＝1.326，M10＝9.326，MCS109, and MCS10≠MCS9And adjusting the modulation level corresponding to the ninth data transmission. Thus, base station 11 determines to adopt the MCS10Modulation class 9 performs the tenth data transmission. After the tenth data transmission, the base station 11 receives the ACK flag and another CQI value CQIb fed back by the user terminal 13.
Then, the base station 11 repeats the modulation level adjustment and data transmission in the CQI feedback interval described above with the modulation level 10 determined by the CQIb as the initial reference of the next CQI feedback interval.
According to the method for processing the data transmission modulation grade, the adjustment coefficient obtained through accumulative calculation reflects the probability that the channel quality state of the channel maintains the last data transmission during each data transmission. The adjustment coefficient is used for correction calculation of the adjustment grade stepping value, so that a subsequent adjustment value is obtained, accurate tracking of the channel quality state in the CQI feedback interval is realized, and the accuracy of the adjustment mode of the modulation grade in the CQI feedback interval is ensured. The method for processing the data transmission modulation grade further improves the data transmission efficiency and the utilization rate of spectrum resources of the wireless communication system. By adopting the processing method for the data transmission modulation grade provided by the embodiment of the application, the CQI feedback period can be prolonged, and further the load of the CQI feedback channel and the time delay caused by the load of the CQI feedback channel can be effectively reduced.
The embodiment of the application also provides a base station. Fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present application. As shown in fig. 4, the base station includes a processor 41 and a memory 42, where the memory 42 stores instructions executable by the processor 41, so that the processor 41 can be used to execute the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, which is not described herein again. It should be understood that the Processor 41 may be a Central Processing Unit (CPU), other general-purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor. The memory 42 may comprise a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one magnetic disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, and the like.
The embodiment of the present application further provides a storage medium, where computer-executable instructions are stored in the storage medium, and when the computer-executable instructions are executed by a processor, the method for processing the data transmission modulation level is implemented. The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Embodiments of the present application also provide a program product, such as a computer program, which when executed by a processor, implements the method for processing the modulation level for data transmission covered by the present application.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for processing a data transmission modulation level, comprising:
receiving a hybrid automatic repeat request (HARQ) result of the mth data transmission in a Channel Quality Indicator (CQI) feedback interval;
performing accumulated correction calculation processing on the HARQ results of the mth data transmission and the previous n data transmissions to obtain a modulation level stepping value corresponding to the (m +1) th data transmission;
adding the modulation grade stepping value corresponding to the (m +1) th data transmission with the modulation grade corresponding to the (m +1) th data transmission to obtain a modulation value corresponding to the (m +1) th data transmission;
determining whether the modulation value corresponding to the (m +1) th data transmission reaches a preset adjustment rule, if so, adjusting the modulation level according to the modulation value corresponding to the (m +1) th data transmission, and performing the (m +1) th data transmission according to the adjusted modulation level;
wherein n and m are natural numbers, 0 is more than m, and n is more than m.
2. The method according to claim 1, wherein the calculating the HARQ result of the m-th data transmission and the n previous data transmissions to obtain the modulation level step value corresponding to the m + 1-th data transmission comprises:
calculating the mth data transmission and the previous HARQ result which is the same as the previous HARQ result and is continuously transmitted for n times to obtain an adjustment coefficient of the (m +1) th data transmission;
and calculating the adjustment coefficient and a preset stepping value based on the HARQ result of the mth data transmission to obtain a modulation grade stepping value corresponding to the (m +1) th data transmission.
3. The method according to claim 2, wherein the calculating the m-th data transmission and the HARQ result of n consecutive data transmissions that are the same as the previous HARQ result to obtain the adjustment coefficient of the m + 1-th data transmission comprises:
adopting formula K for HARQ result of mth data transmission and HARQ result of n consecutive data transmissions which is the same as the previous HARQ result of mth data transmissionm+1Determining an adjustment coefficient K of the (m +1) th data transmission as (n +1)/(m +1)m+1；
Wherein, K1＝0。
4. The method of claim 2, wherein the HARQ results include correct and retransmit;
the calculating the adjustment coefficient and the preset step value based on the HARQ result of the mth data transmission to obtain the modulation level step value corresponding to the (m +1) th data transmission includes:
if the HARQ result of the mth data transmission is correct, the formula theta is adoptedm+1＝θm+(1+Km+1) Determining modulation grade stepping value theta corresponding to the m +1 th data transmission by multiplying deltam+1；
If the HARQ result of the mth data transmission is retransmission, the formula theta is adoptedm+1＝θm-(1+Km+1) Determining modulation grade stepping value theta corresponding to the m +1 th data transmission by multiplying deltam+1；
Wherein, thetamIs the modulation level step value, K, corresponding to the mth data transmissionm+1Is the adjustment coefficient of the (m +1) th data transmission, delta is the preset step value, theta1＝0。
5. The method according to any one of claims 1 to 4, wherein before performing the calculation processing on the HARQ results of the m-th data transmission and the n previous data transmissions to obtain the modulation level step value corresponding to the m + 1-th data transmission, the method further includes:
in CQI feedback interval, receiving modulation level MCS adopted by 1 st data transmission after CQI feedback1A modulation level directly determined according to the fed back CQI.
6. The method according to any one of claims 1 to 4, wherein the determining whether the modulation value corresponding to the (m +1) th data transmission reaches a preset adjustment rule, and if so, adjusting the modulation level according to the modulation value corresponding to the (m +1) th data transmission to perform the (m +1) th data transmission at the adjusted modulation level includes:
a modulation value M corresponding to the M +1 th data transmissionm+1Carrying out mapping processing to obtain the modulation value Mm+1Corresponding modulation level MCSm+1；
Transmitting the m +1 th data to the corresponding modulation level MCSm+1Modulation level MCS corresponding to mth data transmissionmAnd comparing, and determining the adjustment of the modulation level according to the comparison result as follows:
if the comparison result is different, the modulation level is adjusted by MCSm+1Data of m +1 th timeInputting;
if the comparison result is the same, the modulation level does not need to be adjusted, and the MCS is still usedmAnd (5) carrying out data transmission for the (m +1) th time.
7. The method according to claim 6, wherein the modulation value M corresponding to the (M +1) th data transmissionm+1Carrying out mapping processing to obtain the modulation value Mm+1Corresponding modulation level MCSm+1The method comprises the following steps:
modulation value M for the (M +1) th data transmissionm+1Directly rounding down, and taking the rounded value as the corresponding modulation level MCSm+1。
8. The method according to claim 6, wherein the modulation value M corresponding to the (M +1) th data transmissionm+1Carrying out mapping processing to obtain the modulation value Mm+1Corresponding modulation level MCSm+1The method comprises the following steps:
modulation value M for the (M +1) th data transmissionm+1Rounding down or rounding up according to decimal place preset threshold value, and taking the rounded rounding value as corresponding modulation level MCSm+1。
9. A base station, comprising: a processor and a memory;
the memory stores the processor-executable instructions;
wherein execution of the executable instructions stored by the memory by the processor causes the processor to perform the method of any of claims 1-8.
10. A storage medium having stored therein computer executable instructions for performing the method of any one of claims 1-8 when executed by a processor.
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Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1407746A (en) * 2001-09-06 2003-04-02 华为技术有限公司 Self adaptable adjusting method for modulating code mode
US20050025254A1 (en) * 2003-07-31 2005-02-03 Awad Yassin Aden Adaptive modulation and coding
EP1973255A1 (en) * 2007-03-23 2008-09-24 Research In Motion Limited Slow Adaptation of Modulation and Coding for Packet Transmission
WO2009145454A2 (en) * 2008-03-31 2009-12-03 Lg Electronics Inc. Method for transmitting data using harq
CN101651533A (en) * 2009-08-27 2010-02-17 华为技术有限公司 Selection method and device of modulation encoding mode
CN102377508A (en) * 2010-08-13 2012-03-14 中兴通讯股份有限公司 Adaptive modulation and coding method and adaptive modulation and coding device
CN102394717A (en) * 2011-06-28 2012-03-28 北京邮电大学 Self-optimizing adjusting method for modulation coding mode selection threshold value
CN102724016A (en) * 2012-06-05 2012-10-10 中兴通讯股份有限公司 Self-adaptive adjusting method and self-adaptive adjusting device of modulation and coding scheme
CN102833034A (en) * 2011-06-16 2012-12-19 中兴通讯股份有限公司 Method and device for determining modulation and coding scheme (MCS)
CN103457691A (en) * 2012-06-04 2013-12-18 普天信息技术研究院有限公司 Downlink adaptive modulation coding method
CN103516463A (en) * 2012-06-20 2014-01-15 中兴通讯股份有限公司 Method and base station for performing outer-ring automatic modulation and coding adjustment
CN104518842A (en) * 2013-09-27 2015-04-15 普天信息技术研究院有限公司 Method for adaptively adjusting modulation and coding scheme (MCS)
US20170142696A1 (en) * 2015-11-18 2017-05-18 Electronics And Telecommunications Research Institute Method and apparatus for transmitting data
WO2018049562A1 (en) * 2016-09-13 2018-03-22 华为技术有限公司 Adaptive modulation and coding method and base station
CN109150372A (en) * 2017-06-15 2019-01-04 中国信息通信研究院 It is a kind of to modulate and coding strategy method of adjustment and device
CN110708149A (en) * 2018-07-10 2020-01-17 普天信息技术有限公司 Method and device for determining downlink MCS

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1407746A (en) * 2001-09-06 2003-04-02 华为技术有限公司 Self adaptable adjusting method for modulating code mode
US20050025254A1 (en) * 2003-07-31 2005-02-03 Awad Yassin Aden Adaptive modulation and coding
EP1973255A1 (en) * 2007-03-23 2008-09-24 Research In Motion Limited Slow Adaptation of Modulation and Coding for Packet Transmission
WO2009145454A2 (en) * 2008-03-31 2009-12-03 Lg Electronics Inc. Method for transmitting data using harq
CN101651533A (en) * 2009-08-27 2010-02-17 华为技术有限公司 Selection method and device of modulation encoding mode
CN102377508A (en) * 2010-08-13 2012-03-14 中兴通讯股份有限公司 Adaptive modulation and coding method and adaptive modulation and coding device
CN102833034A (en) * 2011-06-16 2012-12-19 中兴通讯股份有限公司 Method and device for determining modulation and coding scheme (MCS)
CN102394717A (en) * 2011-06-28 2012-03-28 北京邮电大学 Self-optimizing adjusting method for modulation coding mode selection threshold value
CN103457691A (en) * 2012-06-04 2013-12-18 普天信息技术研究院有限公司 Downlink adaptive modulation coding method
CN102724016A (en) * 2012-06-05 2012-10-10 中兴通讯股份有限公司 Self-adaptive adjusting method and self-adaptive adjusting device of modulation and coding scheme
CN103516463A (en) * 2012-06-20 2014-01-15 中兴通讯股份有限公司 Method and base station for performing outer-ring automatic modulation and coding adjustment
CN104518842A (en) * 2013-09-27 2015-04-15 普天信息技术研究院有限公司 Method for adaptively adjusting modulation and coding scheme (MCS)
US20170142696A1 (en) * 2015-11-18 2017-05-18 Electronics And Telecommunications Research Institute Method and apparatus for transmitting data
WO2018049562A1 (en) * 2016-09-13 2018-03-22 华为技术有限公司 Adaptive modulation and coding method and base station
CN109150372A (en) * 2017-06-15 2019-01-04 中国信息通信研究院 It is a kind of to modulate and coding strategy method of adjustment and device
CN110708149A (en) * 2018-07-10 2020-01-17 普天信息技术有限公司 Method and device for determining downlink MCS

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"\"R2-084371 Preventing UL HARQ transmissions without MCS information\"" *
HIROTAKA SENDA等: "Specification of Link Quality Degradation in WLAN based on MCS and Retransmission Flag" *
段红光;胡利;田枚;: "LTE-Advanced系统中的自适应调制技术" *

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