CN113922925B - Data transmission modulation class processing method, base station and storage medium - Google Patents

Data transmission modulation class processing method, base station and storage medium Download PDF

Info

Publication number
CN113922925B
CN113922925B CN202111176131.1A CN202111176131A CN113922925B CN 113922925 B CN113922925 B CN 113922925B CN 202111176131 A CN202111176131 A CN 202111176131A CN 113922925 B CN113922925 B CN 113922925B
Authority
CN
China
Prior art keywords
data transmission
modulation
modulation level
value
base station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111176131.1A
Other languages
Chinese (zh)
Other versions
CN113922925A (en
Inventor
张力方
胡泽妍
赵雪聪
程奥林
张伟强
冯毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China United Network Communications Group Co Ltd
Original Assignee
China United Network Communications Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China United Network Communications Group Co Ltd filed Critical China United Network Communications Group Co Ltd
Priority to CN202111176131.1A priority Critical patent/CN113922925B/en
Publication of CN113922925A publication Critical patent/CN113922925A/en
Application granted granted Critical
Publication of CN113922925B publication Critical patent/CN113922925B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

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

Abstract

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

Description

Data transmission modulation class processing method, base station and storage medium
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a method for processing a data transmission modulation class, a base station, and a storage medium.
Background
In the data transmission process of the wireless communication system, the wireless transmission channel is a multipath fading and random time-varying channel, and the time-varying characteristic of the channel directly influences the data transmission efficiency. 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 existing method for adaptively adjusting the data modulation level, a base station selects a modulation level corresponding to the fed-back CQI from a modulation coding strategy (Modulation and Coding Scheme, for short, MCS) set according to a channel quality indication (Channel Quality Indicator, for short, CQI) periodically fed back by a user terminal. Meanwhile, in the CQI feedback interval between every two CQI feedback, in order to further track the channel state, 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 result of the hybrid automatic repeat request (Hybrid Automatic Repeat request, abbreviated as HARQ) fed back by the user terminal in real time, and once the preset grade adjustment rule is met, the modulation grade is immediately adjusted until the next CQI arrives, and the modulation grade is adjusted again.
In the existing method for adaptively adjusting the data modulation level, the modulation level adjustment mode performed in the CQI feedback interval is not accurate, so that data transmission failure is caused, and the retransmission times are increased.
Disclosure of Invention
The application provides a processing method, a base station and a storage medium for data transmission modulation level, which are used for solving the problem that a modulation level adjustment mode performed in a CQI feedback interval in the prior art is inaccurate.
In a first aspect, the present application provides a method for processing a data transmission modulation class, including:
in a channel quality indication CQI feedback interval, receiving a hybrid automatic repeat request (HARQ) result of the mth data transmission;
performing accumulated correction calculation processing on HARQ results of the mth data transmission and the n previous data transmissions to obtain a modulation class stepping value corresponding to the mth+1th data transmission;
adding the modulation level stepping value corresponding to the m+1th data transmission with the modulation level corresponding to the m-th data transmission to obtain the modulation value corresponding to the m+1th data transmission;
determining whether a modulation value corresponding to the m+1th data transmission reaches a preset adjustment rule, and if so, adjusting the modulation level according to the modulation value corresponding to the m+1th data transmission, so as to perform the m+1th data transmission on the adjusted modulation level;
wherein n and m are natural numbers, 0 < m, and n < m.
In a second aspect, the present application provides a base station, including:
a processor and a memory;
the memory stores the processor-executable instructions;
wherein the processor executes the executable instructions stored in the memory, causing the processor to perform the method of processing a data transmission modulation class as described above.
In a third aspect, the present application provides a storage medium having stored therein computer-executable instructions which, when executed by a processor, are adapted to implement a method of processing a data transmission modulation class as described above.
According to the processing method, the base station and the storage medium for the data transmission modulation level, the modulation level stepping value corresponding to each data transmission is subjected to accumulated correction calculation, the obtained modulation level stepping value can more accurately reflect the change trend and the amplitude of the channel quality state in the CQI feedback interval, and more accurate tracking of the channel quality state in the CQI feedback interval is achieved. The modulation grade obtained based on the modulation grade step value calculation is more in line with the channel quality state, the probability of data transmission failure is reduced, and the data transmission efficiency and the frequency spectrum resource utilization rate of the wireless communication system are greatly improved. The method and the device solve the problem that in the prior art, the modulation level adjustment mode carried out in the CQI feedback interval is inaccurate.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a block diagram of a processing system for data transmission modulation class according to an embodiment of the present application;
fig. 2 is a flowchart of a processing method of a data transmission modulation class according to an embodiment of the present application;
fig. 3 is a flowchart of a second method for processing a data transmission modulation class according to an embodiment of the present application;
fig. 4 is a block diagram of a base station according to an embodiment of the present application.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The processing method of the data transmission modulation class is mainly used in a wireless communication system. Fig. 1 is a block diagram of a processing system of a data transmission modulation class according to an embodiment of the present application. As shown in fig. 1, the processing system for data transmission modulation class 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 specifically limited herein.
Specifically, during the signal modulation transmission, firstly, the user terminal 13 periodically feeds back CQI to the base station 11, and the base station 11 determines the modulation class of the data transmission according to the fed-back CQI. The base station 11 modulates the signal to be transmitted according to the parameters corresponding to the determined modulation class, and then transmits the signal data to be transmitted to the user terminal 13. After the base station 11 sends the data packet to the user terminal 13, the user terminal 13 feeds back the HARQ result of each data transmission to the base station 11. Specifically, each time the base station 11 transmits a data packet to the user terminal 13, the user terminal 13 transmits an Acknowledgement (ACK) or non-acknowledgement (NACK) identification in HARQ to the base station 11. If the base station 11 receives the NACK identifier sent by the user terminal 13, the HARQ result indicating the last data transmission fed back by the user terminal 13 is retransmitted, 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 indicator sent by the ue 13, it indicates that the HARQ result of the last data transmission fed back by the ue 13 is correct, and the base station 11 continues to transmit a new data packet to the ue 13.
The ue 13 periodically feeds back CQI to the bs 11, and the bs 11 periodically tracks the channel quality status according to the CQI that is periodically fed back. The base station 11 determines the modulation class corresponding to the channel quality state through the CQI fed back periodically to perform data transmission, so that the transmission efficiency of the data transmission of the communication system is ensured. However, with respect to the time-varying characteristics of the wireless channel, the time-varying channel quality state cannot be tracked by CQI within the CQI feedback interval between every two CQI feedbacks.
In this regard, in the prior art, a method of adaptively adjusting a data modulation level is adopted, so that the channel state in a CQI feedback interval is further tracked, and the data transmission throughput and the spectrum efficiency are improved. Specifically, the base station 11 selects a modulation level corresponding to the fed-back CQI from a Modulation 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 for the modulation class determined based on the received CQI according to the HARQ result fed back in real time by the user terminal 13. Once the modulation level after the equal step size increasing and decreasing process satisfies the preset adjustment rule, the base station 11 immediately adjusts the modulation level until the next CQI arrives, and adjusts the modulation level again.
In the CQI feedback interval, the base station 11 adjusts the modulation value corresponding to the next data transmission according to the following formula 1 based on the ACK/NACK identifier sent in real time by the user terminal 13 after the previous data transmission. The base station 11 then rounds down the modulation value M to obtain the modulation level MCS for each data transmission. Wherein, the liquid crystal display device comprises a liquid crystal display device,modulation value M corresponding to first data transmission after CQI feedback 1 Modulation level MCS corresponding to first data transmission after CQI feedback 1 I.e. M 1 ＝MCS 1 . And 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 the Modulation Coding Scheme (MCS) set according to the CQI value.
Specifically, equation 1 is shown below:
Figure BDA0003295138970000041
wherein N is m The accumulated transmission times of the data packet for the mth data transmission, delta is a preset step value.
The following is exemplified for equation 1:
assuming delta=0.23, when the first data transmission is at modulation level MCS 1 After completion of data transmission, base station 11 receives ACK;
the base station 11 calculates a modulation value MCS corresponding to the second data transmission 2 =7.23, modulation level MCS corresponding to the second data transmission 2 ＝[M 2 ]=7, wherein [ x ]]Representing rounding down the value x. The base station 11 adopts the modulation level MCS 2 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 transmission 3 =7.46, the modulation level MCS corresponding to the third data transmission 3 ＝[M 3 ]=7. The base station 11 adopts the modulation level MCS 3 The third data transmission is performed=7. After the third data transmission, the base station 11 receives the ACK.
Similarly, after the fourth and fifth data transmission, the base station 11 also receives the ACK.
The base station 11 calculates a modulation value M corresponding to the sixth data transmission 6 ＝8.15，MCS 6 ＝[M 6 ]=8. The base station 11 adopts the modulation level MCS 6 A sixth data transmission is performed=8. After the sixth data transmission, the base station 11 receives the ACK。
The base station 11 calculates a modulation value M corresponding to the seventh data transmission 7 ＝8.38，MCS 7 ＝[M 7 ]=8. The base station 11 adopts the modulation level MCS 7 The seventh data transmission is performed=8. After the seventh data transmission, the base station 11 receives NACK.
Thus, according to equation 1, due to M 7 -N 7 δ＝8.38-1×0.23＝8.15，MCS 7 ＝8，(M 7 -N 7 δ)≥MCS 7 The base station 11 calculates a modulation value M corresponding to the eighth data transmission 8 ＝M 7 -N 7 δ＝8.15，MCS 8 ＝[M 8 ]=8. The base station 11 adopts the modulation level MCS 8 Eighth data transmission is performed=8. However, the base station 11 also receives a NACK after the eighth data transmission.
Then, according to equation 1, due to M 8 -N 8 δ＝8.15-2×0.23＝7.69，MCS 8 ＝8，(M 7 -N 7 δ)＜MCS 7 The base station 11 calculates a modulation value M corresponding to the ninth data transmission 9 ＝MCS 8 -1＝7，MCS 9 ＝[M 9 ]=7. The base station 11 adopts the modulation level MCS 9 The ninth data transmission is performed=7. However, the base station 11 also receives a NACK after the ninth data transmission. It follows that according to the prior art equation 1, when (M m -N m δ)＜MCS m The modulation value for the ninth data transmission is directly and substantially reduced to 7 by 8.15 for the eighth data transmission.
Then, the base station 11 calculates a modulation value M corresponding to the tenth data transmission 10 ＝7-0.23＝6.77，MCS 10 ＝[M 10 ]=6. The base station 11 adopts the modulation level MCS 10 Tenth data transmission is performed=6. When the tenth data transmission is followed, the base station 11 receives the ACK and another CQI value, and the modulation class determined from the CQI value is 10. Next, the base station 11 performs the next data transmission with the modulation class 10 and receives the ACK.
Therefore, in the prior art, the base station 11 further tracks the channel quality status in the CQI feedback interval by using the modulation value of each data transmission, and obtains the modulation class corresponding to the data transmission by rounding the modulation value. However, when the base station 11 calculates the modulation value of each data transmission, the modulation value of each data transmission is obtained by mainly increasing or decreasing the modulation value of the last data transmission according to the fixed step delta, and then the corresponding modulation class is obtained. When the channel quality is continuously deteriorated, the base station 11 directly performs a substantial degradation process on the modulation value corresponding to the last data transmission according to the formula 1 in the prior art, and correspondingly, the modulation level also performs a continuous degradation process, so that the efficiency of the data transmission of the system 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 subtracted according to a fixed step length or a large-amplitude degradation type, so that the modulation level corresponding to the obtained modulation value does not accord with the channel quality state, and the modulation level of data transmission is far lower than the modulation level supported by the channel, thereby greatly reducing the data transmission efficiency and the frequency spectrum utilization rate of the wireless communication system.
Therefore, for the existing method for adaptively adjusting the data modulation level, the modulation level adjustment mode performed in the CQI feedback interval is not accurate, and the present application proposes a processing method for data transmission modulation level to solve the problems in the prior art.
The processing method of the data transmission modulation level is mainly used for 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 Modulation and Coding Scheme (MCS) corresponding to the fed-back CQI from a MCS set according to the CQI periodically fed back by the user terminal 1 . Then, during the CQI feedback interval, the base station 11 performs data transmission according to the modulation level MCS for the first time 1 The corresponding parameters are signal modulated and the modulated signal data is then transmitted to the user terminal 13. The user terminal 13 then sends the ACK or NACK in HARQ to the base station. Specifically, the base station 11 transmits once every timeThe data, the user terminal 13 feeds back the HARQ result to the base station 11.
In the CQI feedback interval between the two CQI feedback, 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 receiving the HARQ result of the mth data transmission, the base station 11 performs calculation processing of accumulation correction on the HARQ result of the mth data transmission and the n previous data transmissions, to obtain a modulation class step value corresponding to the mth+1th data transmission. Wherein n and m are natural numbers, 0 < m, and n < m. The accumulated and corrected calculation processing mode 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 limitation of the fixed stepping value on the channel quality state tracking.
Then, the base station 11 adds the modulation level stepping value corresponding to the m+1th data transmission to the modulation level corresponding to the m-th data transmission to obtain the modulation value corresponding to the m+1th data transmission. Then, the base station 11 determines whether the modulation value corresponding to the m+1st data transmission reaches a preset adjustment rule. If the base station 11 determines that the modulation value corresponding to the m+1th data transmission reaches the preset adjustment rule, the modulation level is adjusted according to the modulation value corresponding to the m+1th data transmission, so that the m+1th data transmission is performed on the adjusted modulation level. Otherwise, if the base station 11 determines that the modulation value corresponding to the mth+1st data transmission does not reach the preset adjustment rule, the modulation level is kept unchanged, and the mth+1st data transmission is still performed by adopting the modulation level corresponding to the mth data transmission.
According to the data transmission modulation class processing method, in the CQI feedback interval, the modulation class stepping value corresponding to each data transmission is obtained by accumulation correction calculation according to the HARQ result of the previous data transmission instead of the fixed step length. According to the processing method for the data transmission modulation level, the modulation level stepping value corresponding to each data transmission is subjected to accumulated correction calculation, and the obtained modulation level stepping value can more accurately reflect the change trend and the amplitude of the channel quality state in the CQI feedback interval. Further, the channel quality state of the data transmission in the CQI feedback interval can be tracked more accurately. The modulation grade obtained based on the modulation grade step value calculation is more in line with the channel quality state, the probability of data transmission failure is reduced, and the data transmission efficiency and the frequency spectrum resource utilization rate of the wireless communication system are greatly improved.
Fig. 2 is a flowchart of a processing method of a data transmission modulation class according to an embodiment of the present application, and fig. 2 is a detailed description of a processing method of a data transmission modulation class according to the present application based on fig. 1. As shown in fig. 2, the method includes:
s201, in a channel quality indication CQI feedback interval, receiving a hybrid automatic repeat request HARQ result of mth data transmission;
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 terminal 1 . The modulation level MCS 1 Is the initial reference for modulation level adjustment corresponding to each data transmission in the subsequent CQI feedback interval. During the CQI feedback interval, when the base station 11 performs data transmission on the signal to be transmitted for the first time, the base station performs data transmission according to the modulation level MCS 1 The corresponding parameters are signal modulated and the modulated signal data is then 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 base station 11 transmitting data to the user terminal 13 is correct; otherwise, the NACK flag indicates that the base station 11 retransmits the HARQ result of the data transmitted to the user terminal 13, i.e. 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 transmits an ACK or NACK identification 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.
After receiving the HARQ result of the mth data transmission in the CQI feedback interval, the base station 11 determines a modulation level step value corresponding to the (m+1) th data transmission according to step S202 described below.
S202, carrying out accumulated correction calculation processing on HARQ results of the mth data transmission and the n previous data transmission to obtain a modulation class stepping value corresponding to the mth+1th data transmission;
specifically, the base station 11 calculates the HARQ result of the mth data transmission and the HARQ result of the n consecutive data transmissions identical to the HARQ result of the mth data transmission, by performing accumulation correction, to obtain the modulation class step value corresponding to the (m+1) th data transmission.
Specifically, the base station 11 calculates the HARQ result accumulation probability for the HARQ result of the mth data transmission and the HARQ result of the n previous and consecutive data transmissions, which are the same as the HARQ result of the mth data transmission, to obtain the adjustment coefficient corresponding to the (m+1) th data transmission. Then, the base station 11 performs correction calculation based on the modulation class stepping value corresponding to the mth data transmission by using the adjustment coefficient, and obtains the modulation class stepping value corresponding to the (m+1) th data transmission.
Next, according to the modulation level step value corresponding to the m+1th data transmission obtained in this step, the modulation value corresponding to the m+1th data transmission is determined in step S203 described below.
S203, adding the modulation level stepping value corresponding to the m+1th data transmission and the modulation level corresponding to the m-th data transmission to obtain a modulation value corresponding to the m+1th data transmission;
specifically, the base station 11 adds the modulation level step value corresponding to the m+1th data transmission determined in step S202 to the modulation level corresponding to the m-th data transmission, to obtain the modulation value corresponding to the m+1th data transmission.
The modulation value corresponding to the m+1th data transmission is obtained by performing probability calculation on the HARQ result of the previous m data transmission and correcting calculation on the basis of the modulation level corresponding to the immediately adjacent m data transmission through the steps. Therefore, the modulation value corresponding to the m+1th data transmission can more accurately reflect the channel quality state of the m+1th data transmission, and a foundation is laid for the accuracy of the adjustment of the modulation level corresponding to the data transmission according to the modulation value.
The modulation value corresponding to the m+1th data transmission is obtained by adding the modulation level step value corresponding to the m+1th data transmission to the modulation level corresponding to the m-th data transmission. Therefore, the calculation mode of the modulation value corresponding to the m+1th data transmission avoids the problem that the subsequent modulation level is far lower than the modulation level which can be supported by the channel quality state because the last modulation value is directly and greatly reduced in a crossing way when the channel quality state is poor in the prior art.
After determining the modulation value corresponding to the m+1th data transmission according to this step, the base station 11 determines whether the m+1th data transmission needs to be performed after the modulation level adjustment or whether the data transmission is performed while maintaining the modulation level of the m-th data transmission according to this modulation value in step S204 described below.
S204, determining whether a modulation value corresponding to the m+1th data transmission reaches a preset adjustment rule, and if so, adjusting the modulation level according to the modulation value corresponding to the m+1th data transmission, so as to carry out the m+1th data transmission on the adjusted modulation level.
Specifically, the base station 11 performs mapping processing on the modulation value corresponding to the m+1st data transmission determined in the previous step, and obtains the modulation class corresponding to the modulation value. Then, the base station 11 compares the modulation level corresponding to the m+1th data transmission with the modulation level corresponding to the m+1th data transmission, and determines whether to adjust the modulation level corresponding to the m+1th data transmission according to the following adjustment rule:
if the comparison results are different, the modulation level corresponding to the m+1th data transmission is adjusted, and the m+1th data transmission is carried out according to the modulation level corresponding to the m+1th data transmission;
if the comparison result is the same, the modulation level corresponding to the m+1th data transmission is not required to be adjusted, and the m+1th data transmission is still carried out according to the modulation level corresponding to the m+1th data transmission, so that time delay caused by adjustment of the modulation level is avoided.
The data transmission modulation level provided by the embodiment of the applicationWith the modulation level MCS corresponding to the fed-back CQI 1 And in the CQI feedback interval, carrying out probability calculation on HARQ results of m times of data transmission before the m+1th time of data transmission, and carrying out correction calculation on the probability calculation results on the basis of the modulation level corresponding to the m-th time of data transmission in the next vicinity to obtain a modulation level stepping value corresponding to the m+1th time of data transmission. And finally determining the adjustment of the modulation level corresponding to the m+1th data transmission based on the modulation level stepping value corresponding to the m+1th data transmission. The processing method for the data transmission modulation class realizes the accurate tracking of the channel quality state in the CQI feedback interval, and further determines the more accurate modulation class of each data transmission in the CQI feedback interval for data transmission. The processing method of the data transmission modulation level provided by the embodiment of the application avoids the problem that the modulation level is far lower than the modulation level supported by the channel quality state when the channel quality state continuously worsens in the CQI feedback interval.
For further explanation of the method for processing a data transmission modulation class provided in the present application, fig. 3 shows another embodiment of the method for processing a data transmission modulation class provided in the present application.
Fig. 3 is a flowchart of a second method for processing a data transmission modulation class according to an embodiment of the present application, and fig. 3 is a flowchart for further describing a method for processing a data transmission modulation class according to an embodiment of the present application based on the embodiment shown in fig. 2. As shown in fig. 3, the method includes:
s301, in a channel quality indication CQI feedback interval, receiving a hybrid automatic repeat request (HARQ) result of mth data transmission;
specifically, the specific implementation manner of this step is similar to that of step S201 in the embodiment shown in fig. 2, and this embodiment is not repeated here.
S302, calculating and processing the HARQ results of the mth data transmission and the n continuous data transmission which are the same as the previous HARQ results to obtain the adjustment coefficient of the mth+1th data transmission;
specifically, the base station 11 pairs with the firstThe HARQ result of m data transmissions and the HARQ result of n consecutive data transmissions identical to the HARQ result of the m data transmissions are calculated according to the formula K m+1 = (n+1)/(m+1) determines an adjustment coefficient K for the (m+1) -th data transmission m+1 ；
Wherein K is 1 ＝0。
Specifically, if after the mth data transmission, the base station 11 receives the ACK identifier in the HARQ corresponding to the mth data transmission, performs cumulative calculation on the ACK identifier consecutive to the mth data transmission before the mth data transmission, and if the calculated number of ACK identifiers is n, the adjustment coefficient K of the (m+1) th data transmission m+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 base station performs cumulative calculation on the NACK flag consecutive to the mth data transmission before the mth data transmission, and if the calculated number of NACK flags is n, the adjustment coefficient K of the (m+1) th data transmission m+1 ＝(n+1)/(m+1)；
The adjustment coefficient reflects the probability of the same HARQ result as the mth data transmission after the (m+1) th data transmission, that is, the probability of the channel quality state when the channel of the (m+1) th data transmission maintains the mth data transmission. The adjustment coefficient is used for correction calculation of the modulation value corresponding to the m+1th data transmission, so that higher accuracy of tracking of the obtained adjustment value on the time-varying channel quality state 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 class step value corresponding to the (m+1) th data transmission;
specifically, the HARQ result includes a correct and a retransmission, specifically, the base station 11 receives an ACK flag in the HARQ indicating that the HARQ result of the data transmission is correct, and the base station 11 receives a NACK flag in the HARQ indicating that the HARQ result of the data transmission is a 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 status is better, and the current channel may support a modulation level higher than that of the mth data transmission. Otherwise, if the HARQ result of the mth data transmission is retransmission, that is, the base station 11 receives the NACK identifier after the mth data transmission, it indicates that the current channel quality status is poor, and the current channel does not support the modulation class of the mth data transmission. Therefore, in order to improve the data transmission efficiency of the wireless communication system, the corresponding modulation level can be adjusted according to different HARQ results of the mth data transmission, so as to obtain the modulation level conforming to the channel quality state during the mth+1th data transmission for the mth+1th data transmission.
Specifically, if the HARQ result of the mth data transmission is correct, the formula θ is adopted m+1 ＝θ m +(1+K m+1 ) Determining modulation level stepping value theta corresponding to m+1st data transmission by x delta m+1 The method comprises the steps of carrying out a first treatment on the surface of the The modulation class step value theta m+1 By adjusting the coefficient K m+1 And performing correction calculation. At this time, the m+1th data transmission corresponds to the modulation level step value θ m+1 Modulation class stepping value theta corresponding to mth data transmission m Is higher by (1+K) m+1 ) Amplitude of x delta. Since the HARQ result of the mth data transmission is correct, it is indicated that the channel quality state is good in the mth data transmission. And the m+1st data transmission is correct probability K m+1 So on the basis of the modulation level stepping value corresponding to the mth data transmission, the modulation level stepping value theta corresponding to the following mth+1th data transmission m+1 The increment of (a) is higher than a fixed step delta by K m+1 Amplitude of x delta.
If the HARQ result of the mth data transmission is retransmission, the formula theta is adopted m+1 ＝θ m -(1+K m+1 ) Determining modulation level stepping value theta corresponding to m+1st data transmission by x delta m+1 The method comprises the steps of carrying out a first treatment on the surface of the The HARQ result of the mth data transmission is retransmitted, which indicates that the channel quality state is poor in the mth data transmission. And the probability of retransmission of the (m+1) -th data transmission is K m+1 So the modulation class step value theta corresponding to the mth data transmission m On the basis of the (1) th time transmission, the modulation level stepping value theta corresponding to the subsequent m+1 th time transmission m+1 The subtraction amplitude of (2) is higher than a fixed step deltaK m+1 Amplitude of x delta.
Wherein θ m Is the modulation level stepping value corresponding to the mth data transmission, K m+1 Is the adjustment coefficient of the (m+1) -th data transmission, delta is a preset stepping value, theta 1 ＝0。
S304, adding the modulation level stepping value corresponding to the m+1th data transmission and the modulation level corresponding to the m-th data transmission to obtain a modulation value corresponding to the m+1th data transmission;
specifically, after determining the modulation level stepping value corresponding to the m+1th data transmission in step S303, the base station 11 steps the modulation level stepping value θ corresponding to the m+1th data transmission m+1 Modulation level MCS corresponding to mth data transmission m Adding to obtain a modulation value M corresponding to the m+1st data transmission m+1 . The modulation value M m+1 The method comprises the step value of the modulation level after the correction of the channel quality probability value of the last data transmission is maintained by the modulation level of the last data transmission and the current channel quality state. The modulation value can be used for more accurately tracking the time-varying channel quality state.
S305, mapping the modulation value corresponding to the m+1th data transmission to obtain a modulation class corresponding to the modulation value;
specifically, the modulation levels of the Modulation Coding Schemes (MCSs) adopted when the base station 11 performs data transmission are all integers, and the modulation values corresponding to each data transmission determined by the base station 11 through the above steps are real numbers. Thus, the base station 11 needs to transmit the corresponding modulation value M for the (m+1) -th data m+1 Mapping to obtain modulation value M m+1 Corresponding modulation level MCS m+1 。
Specifically, the base station 11 may modulate the modulation value M for the (m+1) -th data transmission m+1 Directly rounding down, and taking the rounded value as a corresponding modulation level MCS m+1 。
Alternatively, the base station 11 may modulate the modulation value M for the (m+1) -th data transmission m+1 Rounding downwards or upwards according to a decimal preset threshold value, and taking the rounded value as a corresponding modulation level MCS m+1 。
S306, comparing the modulation level corresponding to the m+1th data transmission with the modulation level corresponding to the m th data transmission, and determining the adjustment of the modulation level according to the following comparison result: if the comparison results are different, the modulation levels are adjusted, and the m+1th data transmission is carried out according to the modulation levels corresponding to the m+1th data transmission; if the comparison result is the same, the modulation level is not required to be adjusted, and the (m+1) th data transmission is still carried out according to the modulation level corresponding to the (m) th data transmission;
specifically, after the base station 11 obtains the modulation level corresponding to the m+1th data transmission in step S305, it transmits the modulation level MCS corresponding to the m+1th data transmission m+1 Modulation level MCS corresponding to mth data transmission m Comparing, and determining the adjustment of the modulation level according to the following comparison result:
if the MCS is m+1 ≠MCS m I.e. the comparison result is different, the modulation level is adjusted, and the base station 11 transmits the corresponding modulation level MCS at the m+1st data m+1 Carrying out the (m+1) th data transmission;
if the MCS is m+1 ＝MCS m I.e. the comparison result is the same, the modulation level does not need to be adjusted, and the base station 11 still transmits the corresponding modulation level MCS at the mth data m And carrying out the (m+1) th data transmission.
Further, in order to specifically exemplify the processing method of the data transmission modulation class provided in the embodiment of the present application, the processing method of the data transmission modulation class provided in the present application is explained below based on the specific example provided in the embodiment of the present application shown in table 1. As shown in table 1, specific parameters after the data transmission modulation level processing in the CQI feedback interval by using the data transmission modulation level processing method in the embodiment shown in fig. 3 are as follows:
table 1 specific examples provided in the examples of the present application
Figure BDA0003295138970000131
In particular, as a table1, a preset step value δ=0.2 for a certain channel of the wireless communication system. The base station 11 receives the CQI value CQIa fed back from the user terminal 13 and determines the MCS based on the CQIa 1 The modulation class 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 to perform data transmission. After the first data transmission, the base station 11 receives the ACK identifier fed back by the user terminal 13.
Before the second data transmission by the base station 11, the base station 11 performs the above-mentioned step S302 and equation K m+1 The adjustment coefficient of the second data transmission is calculated by = (n+1)/(m+1), where m=1 and n is 0, and K is calculated 2 =1/2; then, the base station 11 follows the step S303 and the formula θ according to the ACK flag corresponding to the first data transmission m+1 ＝θ m +(1+K m+1 ) Calculating the modulation class stepping value corresponding to the second data transmission by x delta to obtain theta 2 ＝θ 1 +(1+K 2 ) X δ=0+ (1+1/2) x 0.2=0.3; next, the base station 11 calculates a modulation value M corresponding to the second data transmission according to step S304 2 ＝MCS 1 +θ 2 =7.3; the base station 11 obtains the corresponding modulation level, i.e. MCS, by mapping the modulation value 7.3 by the direct down rounding in step S305 2 ＝[M 2 ]＝[7.3]=7; finally, the base station 11 sets the MCS in step S306 2 And MCS 1 Comparing the MCS with the comparison result 2 ＝MCS 1 The description does not require modulation level adjustment. Thus, the base station 11 determines to perform the second data transmission using the modulation class 7 of the first data transmission. After the second data transmission, the base station 11 receives the ACK identifier fed back by the user terminal 13.
Similarly, the base station 11 calculates K before the third data transmission 3 ＝2/3，θ 3 ＝0.567，M 3 ＝7.567，MCS 3 =7, and MCS 3 ＝MCS 2 Modulation level adjustment is not required. Thus, the base station 11 determines to use the modulation class 7 for the third data transmission. After the third data transmission, the base station 11 receives the ACK identifier fed back by the user terminal 13.
Similarly, fourth data transmissionPreviously, the base station 11 calculated K 4 ＝3/4，θ 4 ＝0.867，M 4 ＝7.867，MCS 4 =7, and MCS 4 ＝MCS 3 Modulation level adjustment is not required. Thus, the base station 11 determines to perform the fourth data transmission using the modulation class 7. After the fourth data transmission, the base station 11 receives the NACK identifier fed back by the user terminal 13.
Similarly, the base station 11 calculates K before the fifth data transmission 5 =1/5, according to step S303 and formula θ m+1 ＝θ m -(1+K m+1 ) Calculating theta by using the x delta to calculate the modulation class stepping value corresponding to the fifth data transmission 5 ＝θ 4 - (1+k5) ×δ=0.627, then M is calculated 5 ＝7.62，MCS 5 =7, and MCS 5 ＝MCS 4 Modulation level adjustment is not required. Thus, the base station 11 determines to use the modulation class 7 for the fifth data transmission. After the fifth data transmission, the base station 11 receives the NACK identifier fed back by the user terminal 13.
...；
Similarly, the base station 11 calculates K before the ninth data transmission 9 ＝3/9，θ 9 ＝1.106，M 9 ＝8.106，MCS 9 =8, and MCS 9 ≠MCS 8 The modulation class corresponding to the ninth data transmission is adjusted. Thus, the base station 11 determines to employ the MCS 9 Modulation class 8 performs the ninth data transmission. After the ninth data transmission, the base station 11 receives the ACK identifier fed back by the user terminal 13.
Similarly, the base station 11 calculates K before the tenth data transmission 10 ＝1/10，θ 10 ＝1.326，M 10 ＝9.326，MCS 10 =9, and MCS 10 ≠MCS 9 The modulation class corresponding to the ninth data transmission is adjusted. Thus, the base station 11 determines to employ the MCS 10 Modulation 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 adjustment of the modulation level and the data transmission in the CQI feedback interval described above with the modulation level 10 determined by CQIb as the initial reference of the next CQI feedback interval.
According to the processing method of the data transmission modulation class, the adjustment coefficient obtained through accumulation calculation reflects the probability that the channel maintains the channel quality state in the last data transmission. The adjustment coefficient is used for correction calculation of the adjustment level 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 accuracy of the adjustment mode of the modulation level in the CQI feedback interval is ensured. The processing method of the data transmission modulation level further improves the data transmission efficiency and the utilization rate of spectrum resources of the wireless communication system. By adopting the processing method of the data transmission modulation class, 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 above method embodiment, and the implementation principle and technical effects are similar, and the embodiment is not repeated here. It should be understood that the processor 41 may be a central processing unit (in english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (in english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (in english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. 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 for execution, or in a combination of hardware and software modules in a processor for execution. The memory 42 may comprise a high-speed RAM memory, and may further comprise a nonvolatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.
The embodiment of the application also provides a storage medium, wherein computer execution instructions are stored in the storage medium, and when the computer execution instructions are executed by a processor, the processing method of the data transmission modulation class is realized. The storage medium may be implemented by any type or combination of volatile or nonvolatile 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 disk. 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. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (English: application Specific Integrated Circuits; ASIC). It is also possible that the processor and the storage medium reside as discrete components in an electronic device or a master device.
The embodiments of the present application also provide a program product, such as a computer program, which when executed by a processor implements a method for processing a data transmission modulation class covered by the present application.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, 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 are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A method for processing a data transmission modulation class, comprising:
in a channel quality indication CQI feedback interval, receiving a hybrid automatic repeat request (HARQ) result of the mth data transmission;
performing accumulated correction calculation processing on HARQ results of the mth data transmission and the n previous data transmissions to obtain a modulation class stepping value corresponding to the mth+1th data transmission;
adding the modulation level stepping value corresponding to the m+1th data transmission with the modulation level corresponding to the m-th data transmission to obtain the modulation value corresponding to the m+1th data transmission;
determining whether a modulation value corresponding to the m+1th data transmission reaches a preset adjustment rule, and if so, adjusting the modulation level according to the modulation value corresponding to the m+1th data transmission, so as to perform the m+1th data transmission on the adjusted modulation level;
wherein n and m are natural numbers, 0 < m, and n < m;
the calculating the HARQ result of the mth data transmission and the n previous data transmissions to obtain a modulation class stepping value corresponding to the mth+1th data transmission, including:
for the HARQ result of the mth data transmission and the HARQ result of the previous n data transmissions which are identical and consecutive to the HARQ result of the mth data transmission, the formula K is used m+1 = (n+1)/(m+1) determines an adjustment coefficient K for the (m+1) -th data transmission m+1 ；
Wherein K is 1 ＝0；
The HARQ result includes a correct and retransmission;
if the HARQ result of the mth data transmission is correct, the formula theta is adopted m+1 ＝θ m +(1+K m+1 ) Determining modulation level stepping value theta corresponding to m+1st data transmission by x delta m+1 ；
If the HARQ result of the mth data transmission is retransmission, the formula theta is adopted m+1 ＝θ m -(1+K m+1 ) Determining modulation level stepping value theta corresponding to m+1st data transmission by x delta m+1 ；
Wherein θ m Is the modulation level stepping value corresponding to the mth data transmission, K m+1 Is the adjustment coefficient of the (m+1) -th data transmission, delta is a preset stepping value, theta 1 ＝0。
2. The method of claim 1, wherein the calculating the HARQ result of the mth data transmission and the n previous data transmissions, before obtaining the modulation class step value corresponding to the mth+1th data transmission, further comprises:
within the CQI feedback interval, the 1 st data transmission after receiving CQI feedback adopts the modulation level MCS 1 For a modulation class determined directly from the fed-back CQI.
3. The method of claim 1, wherein the determining whether the modulation value corresponding to the m+1th data transmission reaches a preset adjustment rule, and if so, adjusting the modulation level according to the modulation value corresponding to the m+1th data transmission, so as to perform the m+1th data transmission on the adjusted modulation level, includes:
a modulation value M corresponding to the m+1th data transmission m+1 Mapping to obtain the modulation value M m+1 Corresponding modulation level MCS m+1 ；
Modulation level MCS corresponding to m+1st data transmission m+1 Modulation level MCS corresponding to mth data transmission m Comparing, and determining the adjustment of the modulation level according to the following comparison result:
if the comparison results are different, the modulation level is adjusted by the MCS m+1 Carrying out the (m+1) th data transmission;
if the comparison result is the same, the modulation level is not required to be adjusted, and the MCS is still used m And carrying out the (m+1) th data transmission.
4. A method according to claim 3, wherein the modulation value M corresponding to the m+1th data transmission m+1 Mapping to obtain the modulation value M m+1 Corresponding modulation level MCS m+1 Comprising:
modulation value M for the (m+1) -th data transmission m+1 Directly rounding down, and taking the rounded value as a corresponding modulation level MCS m+1 。
5. A method according to claim 3, wherein the modulation value M corresponding to the m+1th data transmission m+1 Mapping to obtain the modulation value M m+1 Corresponding modulation level MCS m+1 Comprising:
modulation value M for the (m+1) -th data transmission m+1 Rounding downwards or upwards according to a decimal preset threshold value, and taking the rounded value as a corresponding modulation level MCS m+1 。
6. 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 one of claims 1-5.
7. A storage medium having stored therein computer-executable instructions which, when executed by a processor, are adapted to carry out the method of any one of claims 1-5.
CN202111176131.1A 2021-10-09 2021-10-09 Data transmission modulation class processing method, base station and storage medium Active CN113922925B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111176131.1A CN113922925B (en) 2021-10-09 2021-10-09 Data transmission modulation class processing method, base station and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111176131.1A CN113922925B (en) 2021-10-09 2021-10-09 Data transmission modulation class processing method, base station and storage medium

Publications (2)

Publication Number Publication Date
CN113922925A CN113922925A (en) 2022-01-11
CN113922925B true CN113922925B (en) 2023-05-12

Family

ID=79238702

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111176131.1A Active CN113922925B (en) 2021-10-09 2021-10-09 Data transmission modulation class processing method, base station and storage medium

Country Status (1)

Country Link
CN (1) CN113922925B (en)

Citations (5)

* 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
WO2009145454A2 (en) * 2008-03-31 2009-12-03 Lg Electronics Inc. Method for transmitting data using harq
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
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)
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

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404539B (en) * 2003-07-31 2006-06-14 Fujitsu Ltd Adaptive modulation and coding
US8098601B2 (en) * 2007-03-23 2012-01-17 Research In Motion Limited Slow adaptation of modulation and coding for packet transmission
CN101651533B (en) * 2009-08-27 2012-10-03 华为技术有限公司 Selection method and device of modulation encoding mode
CN102377508B (en) * 2010-08-13 2015-06-10 中兴通讯股份有限公司 Adaptive modulation and coding method and adaptive modulation and coding device
CN103457691B (en) * 2012-06-04 2017-04-05 普天信息技术研究院有限公司 Down self-adapting modulation coding method
CN102724016B (en) * 2012-06-05 2017-02-08 青岛艾特网络发展有限公司 Self-adaptive adjusting method and self-adaptive adjusting device of modulation and coding scheme
CN104518842B (en) * 2013-09-27 2018-06-22 普天信息技术研究院有限公司 A kind of method of adaptive adjustment modulation coding scheme
US10171201B2 (en) * 2015-11-18 2019-01-01 Electronics And Telecommunications Research Institute Method and apparatus for transmitting data
CN109644477A (en) * 2016-09-13 2019-04-16 华为技术有限公司 The method of Adaptive Modulation and Coding and base station
CN109150372B (en) * 2017-06-15 2021-08-06 中国信息通信研究院 Modulation and coding strategy adjustment method 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 (5)

* 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
WO2009145454A2 (en) * 2008-03-31 2009-12-03 Lg Electronics Inc. Method for transmitting data using harq
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
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

Also Published As

Publication number Publication date
CN113922925A (en) 2022-01-11

Similar Documents

Publication Publication Date Title
JP5608739B2 (en) Method for transmitting signaling and base station
CN101207461B (en) Method and apparatus for self-adapting regulation of threshold value
US8001440B2 (en) Apparatus and method for performing HARQ transmission in a wireless communication system
KR20080063109A (en) Apparatus and method for forward link outer loop rate control using hybrid automatic repeat request in mobile communication systems
WO2020030178A1 (en) Channel quality indicator feedback enhancement method, device and system, user equipment, and base station
CN111224745B (en) Narrow-band Internet of things NB-IoT network resource allocation method, terminal, equipment and system
US8225162B2 (en) Method and apparatus for power control in a wireless communication system
CN102377508A (en) Adaptive modulation and coding method and adaptive modulation and coding device
US20190068311A1 (en) Apparatus and method for rate control in mobile communication system
EP2015499A2 (en) Retransmitting control method and transmitting device
JP4949323B2 (en) Radio communication system, radio communication station apparatus, and radio communication method
US20100260083A1 (en) Method for Enhancing Accuracy of Rate Adaptation
CN104348576A (en) Method for determining MSC grade in downlink HARQ retransmission and system thereof
WO2023241309A1 (en) Adaptive modulation and coding method and apparatus, base station, and storage medium
CN113922925B (en) Data transmission modulation class processing method, base station and storage medium
CN111277369A (en) Downlink scheduling strategy adjusting method, device and server
CN113890679B (en) Signal modulation method, signal modulation device, electronic equipment and computer readable storage medium
US11412463B2 (en) Power adjustment method, terminal, and storage medium
CN104993909A (en) Data processing method and device for obfuscating data of PUCCH (Physical Uplink Control Channel) format 1b with channel selection 1bcs
CN113595692B (en) AMC-HARQ method based on dynamic threshold optimization design
EP1394979B1 (en) Method and apparatus for dynamically managing the packet segment threshold according to the state of the channel
CN113660067A (en) HARQ scheduling method and device for NR system
CN102739351A (en) Method of processing compatible modulation and coding and communication device
JP5047394B2 (en) Wireless communication system, base station apparatus, and wireless communication method
WO2009145295A1 (en) Radio communication device and radio communication method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant