CN111447041A - Modulation and coding strategy control method and device, storage medium and electronic equipment - Google Patents

Modulation and coding strategy control method and device, storage medium and electronic equipment Download PDF

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CN111447041A
CN111447041A CN201910041074.2A CN201910041074A CN111447041A CN 111447041 A CN111447041 A CN 111447041A CN 201910041074 A CN201910041074 A CN 201910041074A CN 111447041 A CN111447041 A CN 111447041A
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mcs level
channel quality
control terminal
total
period
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CN111447041B (en
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刘志州
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Beijing Xiaomi Pinecone Electronic Co Ltd
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Beijing Xiaomi Pinecone Electronic 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
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • 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
    • H04L1/0014—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the source coding
    • 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
    • H04L1/0001—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
    • H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
    • 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
    • H04L1/0019—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach
    • H04L1/0021—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach in which the algorithm uses adaptive thresholds
    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/203—Details of error rate determination, e.g. BER, FER or WER

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Artificial Intelligence (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

The present disclosure relates to a method, an apparatus, a storage medium and an electronic device for controlling a modulation and coding strategy, and relates to the field of wireless communication, wherein the method is applied to a control terminal, and comprises: updating the outer ring MCS level to the MCS level determined according to the error measurement of the previous outer ring period according to a preset outer ring period, so that the total MCS level is updated to the sum of the outer ring MCS level and the inner ring MCS level, updating the total MCS level to the sum of the total MCS level corresponding to the previous correction period and the preset correction MCS level according to a preset correction period, and adjusting the total MCS level according to a first flow and a second flow, wherein the first flow is the flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the previous correction period, and the second flow is the flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current correction period. The accuracy of the MCS level and the spectrum efficiency of data transmission can be improved.

Description

Modulation and coding strategy control method and device, storage medium and electronic equipment
Technical Field
The present disclosure relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for controlling a modulation and coding strategy, a storage medium, and an electronic device.
Background
In the wireless communication technology, the communication quality is changed in real time due to the complicated and variable environment of the communication channel, which is affected by multipath fading and electric wave interference (e.g. additive white noise). In order to ensure QoS (Quality of Service) of data transmission, it is necessary to dynamically adjust a Modulation scheme and a coding rate between terminals by using an AMC (Adaptive Modulation and coding, chinese) technique, and when the Quality of a communication channel is poor, a Modulation scheme and a coding rate are selected to be smaller, and when the Quality of a communication channel is better, a Modulation scheme and a coding rate are selected to be larger. In the prior art, a BS (Base Station) generally determines an MCS (Modulation and Coding Scheme, chinese: Modulation and Coding strategy) level based on a CQI (Channel Quality Indicator, chinese: Channel Quality Indicator) reported by a UE (User Equipment), and the MCS level is not selected properly due to inaccurate CQI measured by the UE, which reduces the spectrum efficiency of data transmission.
Disclosure of Invention
The present disclosure is directed to a method, an apparatus, a storage medium, and an electronic device for controlling a modulation and coding scheme, so as to solve the problems of inaccurate MCS level and low spectrum efficiency of data transmission in the prior art.
In order to achieve the above object, according to a first aspect of the embodiments of the present disclosure, there is provided a method for controlling a modulation and coding strategy, applied to a control terminal, the method including:
updating an outer ring modulation and coding strategy MCS level to an MCS level determined according to an error metric of a previous outer ring period according to a preset outer ring period, so that a total MCS level is updated to the sum of the outer ring MCS level and an inner ring MCS level, wherein the total MCS level is used for indicating a user terminal to perform data communication with the control terminal, and the inner ring MCS level is an MCS level determined according to channel quality sent by the user terminal;
updating the total MCS level to be the sum of the total MCS level corresponding to the last correction period and a preset correction MCS level according to a preset correction period;
and adjusting the total MCS level according to a first flow and a second flow, wherein the first flow is the flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the last correction period, and the second flow is the flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the current correction period.
Optionally, the error metric includes at least one of a bit error rate SER, a block error rate B L ER and a packet error rate PER, and the channel quality includes at least one of a channel quality indicator CQI, an initial data block error rate IB L ER, inter-cell interference coordination ICIC, a signal-to-noise ratio SNR and a reference signal received power RSRP;
the updating the outer loop modulation and coding strategy MCS level to the MCS level determined according to the error metric of the previous outer loop period according to the preset outer loop period includes:
decreasing the outer loop MCS level when the error metric is greater than a first error threshold;
increasing the outer loop MCS level when the error metric is less than the first error threshold.
Optionally, the adjusting the total MCS level according to the first traffic and the second traffic includes:
when the first flow is larger than the second flow, adjusting the total MCS level to the total MCS level corresponding to the last correction period;
and when the first flow is less than or equal to the second flow, keeping the total MCS level corresponding to the current correction period.
According to a second aspect of the embodiments of the present disclosure, there is provided a method for controlling a modulation and coding strategy, which is applied to a user terminal, the method including:
determining a correction value of a first channel quality according to an error metric in a preset time length before the current time, wherein the first channel quality is determined according to a pilot signal sent by a control terminal;
sending a second channel quality determined according to the first channel quality and the correction value to the control terminal, so that the control terminal determines an inner loop Modulation and Coding Strategy (MCS) level according to the second channel quality, and determines a total MCS level according to the inner loop MCS level, wherein the total MCS level is used for indicating the user terminal to perform data communication with the control terminal;
and repeatedly executing the step of determining a correction value of the first channel quality according to the error metric in the preset time length before the current time until the step of sending the second channel quality determined according to the first channel quality and the correction value to the control terminal.
Optionally, the error metric includes at least one of a bit error rate SER, a block error rate B L ER, and a packet error rate PER, and the first channel quality includes at least one of a channel quality indicator CQI, an initial data block error rate IB L ER, inter-cell interference coordination ICIC, a signal-to-noise ratio SNR, and a reference signal received power RSRP;
determining the correction value of the first channel quality according to the error metric within a preset time period before the current time comprises:
determining the correction value to be a negative number when the error metric is greater than a second error threshold;
determining the correction value to be a positive number when the error metric is less than the second error threshold;
the sending, to the control terminal, the second channel quality determined according to the first channel quality and the correction value includes:
determining the sum of the first channel quality and the correction value as the second channel quality;
and sending the second channel quality to the control terminal.
According to a third aspect of the embodiments of the present disclosure, there is provided a modulation and coding strategy control apparatus, applied to a control terminal, the apparatus including:
an outer ring control module, configured to update an outer ring modulation and coding strategy MCS level to an MCS level determined according to an error metric of a previous outer ring period according to a preset outer ring period, so as to update a total MCS level to a sum of the outer ring MCS level and an inner ring MCS level, where the total MCS level is used to instruct a user terminal to perform data communication with the control terminal, and the inner ring MCS level is an MCS level determined according to channel quality sent by the user terminal;
the correction control module is used for updating the total MCS level into the sum of the total MCS level corresponding to the previous correction period and a preset correction MCS level according to a preset correction period;
and the adjusting module is configured to adjust the total MCS level according to a first traffic and a second traffic, where the first traffic is a traffic when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the previous correction period, and the second traffic is a traffic when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current correction period.
Optionally, the error metric includes at least one of a bit error rate SER, a block error rate B L ER and a packet error rate PER, and the channel quality includes at least one of a channel quality indicator CQI, an initial data block error rate IB L ER, inter-cell interference coordination ICIC, a signal-to-noise ratio SNR and a reference signal received power RSRP;
the outer loop control module includes:
a first update sub-module to decrease the outer loop MCS level when the error metric is greater than a first error threshold;
a second update submodule to increase the outer loop MCS level when the error metric is less than the first error threshold.
Optionally, the adjusting module includes:
an adjusting submodule, configured to adjust the total MCS level to the total MCS level corresponding to the previous modification period when the first traffic is greater than the second traffic;
and the holding submodule is used for holding the total MCS level corresponding to the current correction period when the first flow is less than or equal to the second flow.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a modulation and coding strategy control apparatus, applied to a user terminal, the apparatus including:
the determining module is used for determining a correction value of a first channel quality according to an error metric in a preset time length before the current time, wherein the first channel quality is determined according to a pilot signal sent by a control terminal;
a sending module, configured to send a second channel quality determined according to the first channel quality and the correction value to the control terminal, so that the control terminal determines an inner-loop Modulation and Coding Scheme (MCS) level according to the second channel quality, and determines a total MCS level according to the inner-loop MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal;
and repeatedly executing the step of determining a correction value of the first channel quality according to the error metric in the preset time length before the current time until the step of sending the second channel quality determined according to the first channel quality and the correction value to the control terminal.
Optionally, the error metric includes at least one of a bit error rate SER, a block error rate B L ER, and a packet error rate PER, and the first channel quality includes at least one of a channel quality indicator CQI, an initial data block error rate IB L ER, inter-cell interference coordination ICIC, a signal-to-noise ratio SNR, and a reference signal received power RSRP;
the determining module comprises:
a first determining submodule for determining the correction value as a negative number when the error metric is greater than a second error threshold;
a second determining submodule for determining the correction value as a positive number when the error metric is less than the second error threshold;
the sending module comprises:
a determination submodule configured to determine a sum of the first channel quality and the correction value as the second channel quality;
and the sending submodule is used for sending the second channel quality to the control terminal.
According to a fifth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for controlling a modulation and coding strategy provided by the first aspect.
According to a sixth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the control method of the modulation and coding strategy provided by the second aspect.
According to a seventh aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method for controlling a modulation and coding strategy provided by the first aspect.
According to an eighth aspect of embodiments of the present disclosure, there is provided an electronic apparatus including:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method for controlling a modulation and coding strategy provided by the second aspect.
Through the technical scheme, the user terminal determines the correction value of the first channel quality according to the error metric in the preset time length before the current time, wherein the first channel quality is the channel quality determined by the user terminal according to the pilot signal sent by the control terminal, determines the second channel quality according to the first channel quality and the correction value, and sends the second channel quality to the control terminal, so that the control terminal can determine the inner-loop MCS grade according to the second channel quality, and repeatedly executes the steps of determining the correction value and sending the second channel quality to the control terminal. The control terminal determines the inner ring MCS level after receiving the channel quality sent by the user terminal, updates the outer ring MCS level to the MCS level determined according to the error measurement of the last outer ring period according to the preset outer ring period, so that the total MCS level is the sum of the outer ring MCS level and the inner ring MCS level, updates the total MCS level to the sum of the total MCS level corresponding to the last correction period and the preset correction MCS level according to the preset correction period, and finally adjusts the total MCS level according to the first flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the last correction period and the second flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current correction period, so that the accuracy of the MCS level and the spectrum efficiency of data transmission can be improved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a flow chart illustrating a method of controlling a modulation and coding strategy according to an exemplary embodiment;
FIG. 2 is a flow diagram illustrating another method of controlling a modulation and coding strategy in accordance with an exemplary embodiment;
FIG. 3 is a flow diagram illustrating another method of controlling a modulation and coding strategy in accordance with an exemplary embodiment;
FIG. 4 is a flow diagram illustrating a method of controlling a modulation and coding strategy in accordance with an exemplary embodiment;
FIG. 5 is a flow chart illustrating another method of controlling a modulation and coding strategy in accordance with an exemplary embodiment;
FIG. 6 is a block diagram illustrating a control apparatus of a modulation and coding strategy in accordance with an exemplary embodiment;
FIG. 7 is a block diagram illustrating another modulation and coding strategy control apparatus according to an exemplary embodiment;
FIG. 8 is a block diagram illustrating another modulation and coding strategy control apparatus according to an exemplary embodiment;
FIG. 9 is a block diagram illustrating a control apparatus of a modulation and coding strategy in accordance with an exemplary embodiment;
FIG. 10 is a block diagram illustrating another modulation and coding strategy control apparatus according to an exemplary embodiment;
FIG. 11 is a block diagram illustrating an electronic device in accordance with an exemplary embodiment;
FIG. 12 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Before introducing the modulation and coding strategy control method, apparatus, storage medium, and electronic device provided by the present disclosure, an application scenario related to each embodiment in the present disclosure is introduced, where the application scenario includes a user terminal and a control terminal, and data communication can be performed between the user terminal and the control terminal according to an MCS level allocated by the control terminal, that is, the user terminal performs downlink demodulation or uplink modulation according to the MCS level, and the control terminal performs downlink modulation or uplink demodulation according to the MCS level. The user terminal may be understood as UE, and may be any terminal having a wireless communication function, for example, a smart phone, a smart watch, a tablet computer, or the like, and the control terminal may be understood as BS or UE, and may be any terminal capable of serving as a wireless communication switching center, for example, a macro base station, a micro base station, a repeater, a radio remote base station, or the like, or a terminal such as a smart phone, a smart watch, or a tablet computer.
Fig. 1 is a flowchart illustrating a method for controlling a modulation and coding scheme according to an exemplary embodiment, where the method is applied to a control terminal, as shown in fig. 1, and includes:
step 101, updating the outer ring modulation and coding strategy MCS level to an MCS level determined according to the error metric of the previous outer ring period according to a preset outer ring period, so that the total MCS level is updated to the sum of the outer ring MCS level and the inner ring MCS level, the total MCS level is used for indicating the user terminal to perform data communication with the control terminal, and the inner ring MCS level is determined according to the channel quality sent by the user terminal.
For example, the control terminal constantly sends a data Signal and a CRS (Cell Reference Signal, chinese) to the user terminal according to a preset sending frequency, and the user terminal determines the current Channel Quality according to the received CRS and reports the Channel Quality to the control terminal, wherein the Channel Quality may include at least one of parameters such as CQI (Channel Quality Indicator, chinese), IB L ER (Initial block error Rate, chinese), ICIC (Inter Cell interference coordination, chinese), SNR (Signal-Noise Ratio, chinese), RSRP (Reference Signal Receiving Power), etc. the control terminal determines the MCS level according to the Channel Quality, for example, the control terminal may determine the MCS level by table lookup, and the corresponding relation between the MCS level and the MCS level may be stored in the MCS table.
Thereafter, the control terminal updates the outer loop MCS level according to a preset outer loop period (which may be 20ms, for example), where the outer loop MCS level may be an MCS level determined by the control terminal according to the error metric of the last outer loop period. After updating the outer loop MCS level, the control terminal updates the total MCS level to: the sum of the inner ring MCS level and the outer ring MCS level, and the total MCS level is sent to the user terminal, so that the user terminal can perform data communication with the control terminal according to the total MCS level (that is, the user terminal performs downlink demodulation or uplink modulation according to the total MCS level, and the control terminal performs downlink modulation or uplink demodulation according to the total MCS level). It is to be understood that the initial value of the outer loop MCS level may be set to 0, and in the first outer loop period, the total MCS level is equal to the inner loop MCS level +0, that is, the total MCS level is the inner loop MCS level. In the second outer loop period, the control terminal determines the outer loop MCS level according to the error metric counted in the first outer loop period, for example, a threshold may be preset, when the error metric is greater than the threshold, the total MCS level is determined to be higher, the total MCS level should be lowered, the outer loop MCS level may be determined to be a negative value (for example: -2), when the error metric is less than the threshold, the total MCS level is determined to be lower, the total MCS level should be raised, the outer loop MCS level may be determined to be a positive value (for example: 3), and the total MCS level is equal to the inner loop MCS level + the outer loop MCS level. In each outer loop period, step 101 is repeatedly executed, and the outer loop MCS level can be adjusted in real time to update the total MCS level.
And 102, updating the total MCS level to be the sum of the total MCS level corresponding to the last correction period and the preset correction MCS level according to the preset correction period.
And 103, adjusting the total MCS level according to a first flow and a second flow, wherein the first flow is the flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the last correction period, and the second flow is the flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the current correction period.
For example, when the communication channel is full of resources, a part of spectrum resources may not be utilized, and in order to improve the utilization rate of the spectrum resources (i.e., use all available frequency domain resources), the level of MCS may be adjusted to achieve the purpose of reducing the error metric and the delay while satisfying the QoS of data transmission. Therefore, whether the spectrum efficiency of the current data transmission is reasonable or not can be judged by measuring the flow when the user terminal and the control terminal carry out data communication, so that the aim of improving the data flow is fulfilled. A modified MCS level (for example, 1 or-1) may be preset, and after the control terminal determines the total MCS level, the total MCS level is updated to the sum of the total MCS level and the modified MCS level corresponding to the previous modification period according to a preset modification period (for example, 50ms), and the updated total MCS level is sent to the user terminal, so that the user terminal and the control terminal can perform data communication according to the updated total MCS level. And then the control terminal counts the second flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the current correction period, and the first flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the last correction period, which are recorded before, so as to adjust the total MCS level. For example, when the first traffic is greater than the second traffic, the total MCS level may be adjusted to the total MCS level corresponding to the last modification period, and when the first traffic is less than or equal to the second traffic, the current total MCS level is maintained.
Fig. 2 is a flowchart illustrating another control method for a modulation and coding scheme according to an exemplary embodiment, and as shown in fig. 2, step 101 may be implemented by:
in step 1011, when the error metric is greater than the first error threshold, the outer loop MCS level is decreased.
Step 1012, when the error metric is smaller than the first error threshold, the outer loop MCS level is increased.
For example, the channel quality may include at least one of a channel quality indicator CQI, an initial data Block Error Rate IB L ER, an inter-cell interference coordination ICIC, a signal-to-noise ratio SNR, and a reference signal received power RSRP, the Error metric includes at least one of a SER (English: Symbol Error Rate), a B L ER (English: Block Error Rate), a Chinese: Block Error Rate), and a PER (Packet Error Rate).Outer cover＝MCSOuter cover+ delta, wherein, MCS'Outer coverIndicates the updated outer loop MCS level, MCSOuter coverOuter of last outer ring periodRing MCS level. The outer loop MCS level of the last outer loop cycle may be maintained when the error metric is equal to the first error threshold, decreased when the error metric is greater than the first error threshold, i.e., the delta value is set to a negative number (e.g., -3), and increased when the error metric is less than the first error threshold, i.e., the delta value is set to a positive number (e.g., 1).
Fig. 3 is a flowchart illustrating another modulation and coding scheme control method according to an exemplary embodiment, and as shown in fig. 3, step 103 may include the following steps:
and step 1031, when the first flow rate is greater than the second flow rate, adjusting the total MCS level to the total MCS level corresponding to the previous modification period.
And 1032, when the first flow is less than or equal to the second flow, keeping the total MCS level corresponding to the current correction period.
For example, when the first traffic is greater than the second traffic, the total MCS level is adjusted to the total MCS level corresponding to the previous modification period, and when the first traffic is less than or equal to the second traffic, the total MCS level corresponding to the current modification period is maintained. After the total MCS level corresponding to the current modification period is determined in step 102, the updated total MCS level is sent to the user terminal, so that the user terminal and the control terminal can perform data communication according to the updated total MCS level, in the current modification period, the control terminal counts traffic (i.e., second traffic) when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current modification period, and compares the second traffic with traffic (i.e., first traffic) counted by the control terminal in the previous modification period, so as to adjust the total MCS level. It can be understood that the initial value of the first traffic is 0, and during the first modification period, the traffic corresponding to the first modification period (i.e., the second traffic) is determined, and at this time, the second traffic is greater than the first traffic, so that the total MCS level corresponding to the current modification period (i.e., the first modification period) is maintained. And during the second correction period, determining the flow (namely, the second flow) corresponding to the second correction period, comparing the flow corresponding to the second correction period with the flow corresponding to the first correction period to adjust the total MCS level, and so on, so that the total MCS level can be adjusted in real time to achieve the purpose of fully utilizing the spectrum resources.
To sum up, in the present disclosure, a control terminal determines an inner loop MCS level after receiving channel quality sent by a user terminal, and updates an outer loop MCS level to an MCS level determined according to an error metric of a previous outer loop cycle according to a preset outer loop cycle, so that a total MCS level is a sum of the outer loop MCS level and the inner loop MCS level, where the total MCS level is used to instruct the user terminal and the control terminal to perform data communication, and then updates the total MCS level to a sum of a total MCS level corresponding to a previous modification cycle and a preset modified MCS level according to a preset modification cycle, and finally adjusts the total MCS level according to a first flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the previous modification cycle and a second flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current modification cycle, so as to improve accuracy of the MCS level, and the spectral efficiency of the data transmission.
Fig. 4 is a flowchart illustrating a method for controlling a modulation and coding scheme, according to an exemplary embodiment, where the method is applied to a user terminal, as shown in fig. 4, and includes:
step 201, determining a correction value of a first channel quality according to the error metric within a preset time period before the current time, where the first channel quality is determined according to a pilot signal sent by the control terminal.
Step 202, sending the second channel quality determined according to the first channel quality and the correction value to the control terminal, so that the control terminal determines an inner loop modulation and coding strategy MCS level according to the second channel quality, and determines a total MCS level according to the inner loop MCS level, wherein the total MCS level is used for indicating the user terminal to perform data communication with the control terminal.
Step 201 to step 202 are repeatedly executed.
For example, the control terminal continuously transmits a data signal and a CRS to the user terminal according to a preset transmission frequency, the user terminal first determines a current first channel quality according to the received CRS, then counts an error metric within a preset time period (for example, 10ms) before the current time, determines a correction value of the first channel quality according to the error metric, then determines a second channel quality according to the first channel quality and the correction value, and reports the second channel quality to the control terminal, and repeatedly executes steps 201 to 202, so that the user terminal continuously reports the second channel quality to the control terminal with the preset time period.
Fig. 5 is a flowchart illustrating another control method of a modulation and coding scheme according to an exemplary embodiment, and as shown in fig. 5, step 201 may be implemented by:
in step 2011, the correction value is determined to be negative when the error metric is greater than the second error threshold.
In step 2012, the correction value is determined to be a positive number when the error metric is less than the second error threshold.
Step 202 may be implemented by:
step 2021, determine the sum of the first channel quality and the correction value as the second channel quality.
Step 2022, sending the second channel quality to the control terminal.
For example, when the error metric is greater than the second error threshold, it indicates that the current channel quality is poor, resulting in an error metric that is too high, the correction value may be determined to be a negative number, so as to decrease the channel quality reported to the control terminal (i.e., the second channel quality), when the error metric is less than the second error threshold, the current channel quality is better, the error metric is lower, so that the correction value may be determined to be a positive number, so as to increase the channel quality reported to the control terminal (i.e., the second channel quality), and when the error metric is equal to the second error threshold, the correction value may be determined to be zero, i.e., the second channel quality is the same as the first channel quality. After the correction value is determined, the sum of the first channel quality and the correction value is used as a second channel quality, and the second channel quality is transmitted to the control terminal.
In summary, in the present disclosure, a user terminal first determines a correction value of a first channel quality according to an error metric within a preset time period before a current time, where the first channel quality is determined by the user terminal according to a pilot signal sent by a control terminal, then determines a second channel quality according to the first channel quality and the correction value, and sends the second channel quality to the control terminal, so that the control terminal can determine an inner loop MCS level according to the second channel quality and determine a total MCS level according to the inner loop MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal, and finally, repeatedly performs the step of determining the correction value until the second channel quality is sent to the control terminal. The accuracy of the MCS level and the spectrum efficiency of data transmission can be improved.
Fig. 6 is a block diagram illustrating a modulation and coding scheme control apparatus according to an exemplary embodiment, and as shown in fig. 6, the apparatus 300 is applied to a control terminal and includes:
the outer loop control module 301 is configured to update the outer loop modulation and coding strategy MCS level to an MCS level determined according to the error metric of the previous outer loop period according to a preset outer loop period, so that the total MCS level is updated to a sum of the outer loop MCS level and the inner loop MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal, and the inner loop MCS level is an MCS level determined according to the channel quality sent by the user terminal.
And a modification control module 302, configured to update the total MCS level to a sum of the total MCS level corresponding to the previous modification period and a preset modified MCS level according to a preset modification period.
And an adjusting module 303, configured to adjust the total MCS level according to a first traffic and a second traffic, where the first traffic is a traffic when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the previous correction period, and the second traffic is a traffic when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current correction period.
Fig. 7 is a block diagram illustrating another modulation and coding strategy control apparatus according to an exemplary embodiment, where as shown in fig. 7, the error metric includes at least one of a bit error rate SER, a block error rate B L ER, and a packet error rate PER, and the channel quality includes at least one of a channel quality indicator CQI, an initial data block error rate IB L ER, an inter-cell interference coordination ICIC, a signal-to-noise ratio SNR, and a reference signal received power RSRP.
The outer loop control module 301 may include:
a first update sub-module 3011 configured to decrease the outer loop MCS level when the error metric is greater than a first error threshold.
A second update sub-module 3012, configured to increase the outer loop MCS level when the error metric is smaller than the first error threshold.
Fig. 8 is a block diagram illustrating another modulation and coding scheme control apparatus according to an exemplary embodiment, and as shown in fig. 8, the adjusting module 303 includes:
the adjusting submodule 3031 is configured to adjust the total MCS level to the total MCS level corresponding to the previous modification period when the first traffic is greater than the second traffic.
The holding submodule 3032 is configured to hold the total MCS level corresponding to the current modification period when the first traffic is less than or equal to the second traffic.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
To sum up, in the present disclosure, a control terminal determines an inner loop MCS level after receiving channel quality sent by a user terminal, and updates an outer loop MCS level to an MCS level determined according to an error metric of a previous outer loop cycle according to a preset outer loop cycle, so that a total MCS level is a sum of the outer loop MCS level and the inner loop MCS level, where the total MCS level is used to instruct the user terminal and the control terminal to perform data communication, and then updates the total MCS level to a sum of a total MCS level corresponding to a previous modification cycle and a preset modified MCS level according to a preset modification cycle, and finally adjusts the total MCS level according to a first flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the previous modification cycle and a second flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current modification cycle, so as to improve accuracy of the MCS level, and the spectral efficiency of the data transmission.
Fig. 9 is a block diagram illustrating a modulation and coding scheme control apparatus according to an exemplary embodiment, and as shown in fig. 9, the apparatus 400 is applied to a user terminal and includes:
a determining module 401, configured to determine a correction value of a first channel quality according to the error metric in a preset time period before the current time, where the first channel quality is determined according to a pilot signal sent by the control terminal.
A sending module 402, configured to send the second channel quality determined according to the first channel quality and the correction value to the control terminal, so that the control terminal determines an inner loop modulation and coding strategy MCS level according to the second channel quality, and determines a total MCS level according to the inner loop MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal.
And repeatedly executing the steps of determining the correction value of the first channel quality according to the error measurement in the preset time length before the current time, and sending the second channel quality determined according to the first channel quality and the correction value to the control terminal.
Fig. 10 is a block diagram illustrating another modulation and coding strategy control apparatus according to an exemplary embodiment, where as shown in fig. 10, the error metric includes at least one of a bit error rate SER, a block error rate B L ER, and a packet error rate PER, and the first channel quality includes at least one of a channel quality indicator CQI, an initial data block error rate IB L ER, an inter-cell interference coordination ICIC, a signal-to-noise ratio SNR, and a reference signal received power RSRP.
The determination module 401 includes:
a first determining sub-module 4011 configured to determine the correction value as a negative number when the error metric is greater than the second error threshold.
A second determining sub-module 4012 configured to determine the correction value as a positive number when the error metric is smaller than a second error threshold.
The sending module 402 includes:
the determining sub-module 4021 is configured to determine the sum of the first channel quality and the correction value as the second channel quality.
A sending submodule 4022, configured to send the second channel quality to the control terminal.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
In summary, in the present disclosure, a user terminal first determines a correction value of a first channel quality according to an error metric within a preset time period before a current time, where the first channel quality is determined by the user terminal according to a pilot signal sent by a control terminal, then determines a second channel quality according to the first channel quality and the correction value, and sends the second channel quality to the control terminal, so that the control terminal can determine an inner loop MCS level according to the second channel quality and determine a total MCS level according to the inner loop MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal, and finally, repeatedly performs the step of determining the correction value until the second channel quality is sent to the control terminal. The accuracy of the MCS level and the spectrum efficiency of data transmission can be improved.
Fig. 11 is a block diagram illustrating an electronic device 500 in accordance with an example embodiment. As shown in fig. 11, the electronic device 500 may include: a processor 501 and a memory 502. The electronic device 500 may also include one or more of a multimedia component 503, an input/output (I/O) interface 504, and a communication component 505.
The processor 501 is configured to control the overall operation of the electronic device 500, so as to complete all or part of the steps in the method for controlling the modulation and coding scheme shown in fig. 4 or fig. 5. The memory 502 is used to store various types of data to support operation at the electronic device 500, such as instructions for any application or method operating on the electronic device 500 and application-related data, such as contact data, messaging, pictures, audio, video, and so forth. The Memory 502 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, 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 disk or optical disk. The multimedia component 503 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 502 or transmitted through the communication component 505. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 504 provides an interface between the processor 501 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them, so that the corresponding Communication component 505 may include: Wi-Fi module, bluetooth module, NFC module.
In an exemplary embodiment, the electronic Device 500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable logic devices (Programmable L analog devices, P L D), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components, and is used for executing the control method of the modulation and coding strategy shown in fig. 4 or fig. 5.
In another exemplary embodiment, a computer readable storage medium including program instructions, which when executed by a processor, implement the steps of the control method of the modulation and coding scheme of fig. 4 or 5 described above is also provided. For example, the computer readable storage medium may be the memory 502 described above comprising program instructions executable by the processor 501 of the electronic device 500 to perform the modulation and coding scheme control method described above with reference to fig. 4 or 5.
In summary, in the present disclosure, a user terminal first determines a correction value of a first channel quality according to an error metric within a preset time period before a current time, where the first channel quality is determined by the user terminal according to a pilot signal sent by a control terminal, then determines a second channel quality according to the first channel quality and the correction value, and sends the second channel quality to the control terminal, so that the control terminal can determine an inner loop MCS level according to the second channel quality and determine a total MCS level according to the inner loop MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal, and finally, repeatedly performs the step of determining the correction value until the second channel quality is sent to the control terminal. The accuracy of the MCS level and the spectrum efficiency of data transmission can be improved.
Fig. 12 is a block diagram illustrating an electronic device 600 according to an example embodiment. For example, the electronic device 600 may be provided as a server. Referring to fig. 12, the electronic device 600 includes a processor 622, which may be one or more in number, and a memory 632 for storing computer programs executable by the processor 622. The computer program stored in memory 632 may include one or more modules that each correspond to a set of instructions. Further, the processor 622 may be configured to execute the computer program to perform the control method of the modulation and coding scheme shown in fig. 1 to 3.
In addition, the electronic device 600 may further include a power component 626 and a communication component 650, the power component 626 may be configured to perform power management of the electronic device 600, the communication component 650 may be configured to enable communication, e.g., wired or wireless communication, of the electronic device 600. in addition, the electronic device 600 may further include an input/output (I/O) interface 658. the electronic device 600 may be operable based on an operating system stored in the memory 632, e.g., Windows Server, Mac OSXTM, UnixTM, &lTtTtranslation = L "&gg g L &lTt/T &gTt g inuxTM, and so on.
In another exemplary embodiment, a computer readable storage medium including program instructions, which when executed by a processor, implement the steps of the modulation and coding scheme control method described above with reference to fig. 1 to 3 is also provided. For example, the computer readable storage medium may be the memory 632 including program instructions executable by the processor 622 of the electronic device 600 to perform the modulation and coding strategy control method described above with reference to fig. 1 to 3.
To sum up, in the present disclosure, a control terminal determines an inner loop MCS level after receiving channel quality sent by a user terminal, and updates an outer loop MCS level to an MCS level determined according to an error metric of a previous outer loop cycle according to a preset outer loop cycle, so that a total MCS level is a sum of the outer loop MCS level and the inner loop MCS level, where the total MCS level is used to instruct the user terminal and the control terminal to perform data communication, and then updates the total MCS level to a sum of a total MCS level corresponding to a previous modification cycle and a preset modified MCS level according to a preset modification cycle, and finally adjusts the total MCS level according to a first flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the previous modification cycle and a second flow when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current modification cycle, so as to improve accuracy of the MCS level, and the spectral efficiency of the data transmission.
Preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and other embodiments of the present disclosure may be easily conceived by those skilled in the art within the technical spirit of the present disclosure after considering the description and practicing the present disclosure, and all fall within the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. Meanwhile, any combination can be made between various different embodiments of the disclosure, and the disclosure should be regarded as the disclosure of the disclosure as long as the combination does not depart from the idea of the disclosure. The present disclosure is not limited to the precise structures that have been described above, and the scope of the present disclosure is limited only by the appended claims.

Claims (14)

1. A method for controlling a modulation and coding strategy is applied to a control terminal, and the method comprises the following steps:
updating an outer ring modulation and coding strategy MCS level to an MCS level determined according to an error metric of a previous outer ring period according to a preset outer ring period, so that a total MCS level is updated to the sum of the outer ring MCS level and an inner ring MCS level, wherein the total MCS level is used for indicating a user terminal to perform data communication with the control terminal, and the inner ring MCS level is an MCS level determined according to channel quality sent by the user terminal;
updating the total MCS level to be the sum of the total MCS level corresponding to the last correction period and a preset correction MCS level according to a preset correction period;
and adjusting the total MCS level according to a first flow and a second flow, wherein the first flow is the flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the last correction period, and the second flow is the flow when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the current correction period.
2. The method according to claim 1, wherein the error metric comprises at least one of a bit error rate (SER), a block error rate (B L ER), and a Packet Error Rate (PER), and wherein the channel quality comprises at least one of a Channel Quality Indicator (CQI), an initial data block error rate (IB L ER), inter-cell interference coordination (ICIC), a signal-to-noise ratio (SNR), and a Reference Signal Received Power (RSRP);
the updating the outer loop modulation and coding strategy MCS level to the MCS level determined according to the error metric of the previous outer loop period according to the preset outer loop period includes:
decreasing the outer loop MCS level when the error metric is greater than a first error threshold;
increasing the outer loop MCS level when the error metric is less than the first error threshold.
3. The method of claim 1, wherein the adjusting the total MCS level based on the first traffic and the second traffic comprises:
when the first flow is larger than the second flow, adjusting the total MCS level to the total MCS level corresponding to the last correction period;
and when the first flow is less than or equal to the second flow, keeping the total MCS level corresponding to the current correction period.
4. A method for controlling a modulation and coding strategy is applied to a user terminal, and the method comprises the following steps:
determining a correction value of a first channel quality according to an error metric in a preset time length before the current time, wherein the first channel quality is determined according to a pilot signal sent by a control terminal;
sending a second channel quality determined according to the first channel quality and the correction value to the control terminal, so that the control terminal determines an inner loop Modulation and Coding Strategy (MCS) level according to the second channel quality, and determines a total MCS level according to the inner loop MCS level, wherein the total MCS level is used for indicating the user terminal to perform data communication with the control terminal;
and repeatedly executing the step of determining a correction value of the first channel quality according to the error metric in the preset time length before the current time until the step of sending the second channel quality determined according to the first channel quality and the correction value to the control terminal.
5. The method according to claim 4, wherein the error metric comprises at least one of a bit error rate (SER), a block error rate (B L ER), and a Packet Error Rate (PER), and wherein the first channel quality comprises at least one of a Channel Quality Indicator (CQI), an initial data block error rate (IB L ER), inter-cell interference coordination (ICIC), a signal-to-noise ratio (SNR), and a Reference Signal Received Power (RSRP);
determining the correction value of the first channel quality according to the error metric within a preset time period before the current time comprises:
determining the correction value to be a negative number when the error metric is greater than a second error threshold;
determining the correction value to be a positive number when the error metric is less than the second error threshold;
the sending, to the control terminal, the second channel quality determined according to the first channel quality and the correction value includes:
determining the sum of the first channel quality and the correction value as the second channel quality;
and sending the second channel quality to the control terminal.
6. A control apparatus for modulation and coding strategy, applied to a control terminal, the apparatus comprising:
an outer ring control module, configured to update an outer ring modulation and coding strategy MCS level to an MCS level determined according to an error metric of a previous outer ring period according to a preset outer ring period, so as to update a total MCS level to a sum of the outer ring MCS level and an inner ring MCS level, where the total MCS level is used to instruct a user terminal to perform data communication with the control terminal, and the inner ring MCS level is an MCS level determined according to channel quality sent by the user terminal;
the correction control module is used for updating the total MCS level into the sum of the total MCS level corresponding to the previous correction period and a preset correction MCS level according to a preset correction period;
and the adjusting module is configured to adjust the total MCS level according to a first traffic and a second traffic, where the first traffic is a traffic when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the previous correction period, and the second traffic is a traffic when the user terminal and the control terminal perform data communication according to the total MCS level corresponding to the current correction period.
7. The apparatus according to claim 6, wherein the error metric comprises at least one of a bit error rate (SER), a block error rate (B L ER), and a Packet Error Rate (PER), and wherein the channel quality comprises at least one of a Channel Quality Indicator (CQI), an initial data block error rate (IB L ER), inter-cell interference coordination (ICIC), a signal-to-noise ratio (SNR), and a Reference Signal Received Power (RSRP);
the outer loop control module includes:
a first update sub-module to decrease the outer loop MCS level when the error metric is greater than a first error threshold;
a second update submodule to increase the outer loop MCS level when the error metric is less than the first error threshold.
8. The apparatus of claim 6, wherein the adjustment module comprises:
an adjusting submodule, configured to adjust the total MCS level to the total MCS level corresponding to the previous modification period when the first traffic is greater than the second traffic;
and the holding submodule is used for holding the total MCS level corresponding to the current correction period when the first flow is less than or equal to the second flow.
9. A control apparatus for modulation and coding strategy, applied to a user terminal, the apparatus comprising:
the determining module is used for determining a correction value of a first channel quality according to an error metric in a preset time length before the current time, wherein the first channel quality is determined according to a pilot signal sent by a control terminal;
a sending module, configured to send a second channel quality determined according to the first channel quality and the correction value to the control terminal, so that the control terminal determines an inner-loop Modulation and Coding Scheme (MCS) level according to the second channel quality, and determines a total MCS level according to the inner-loop MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal;
and repeatedly executing the step of determining a correction value of the first channel quality according to the error metric in the preset time length before the current time until the step of sending the second channel quality determined according to the first channel quality and the correction value to the control terminal.
10. The apparatus according to claim 9, wherein the error metric comprises at least one of a bit error rate (SER), a block error rate (B L ER), and a Packet Error Rate (PER), and wherein the first channel quality comprises at least one of a Channel Quality Indicator (CQI), an initial data block error rate (IB L ER), inter-cell interference coordination (ICIC), a signal-to-noise ratio (SNR), and a Reference Signal Received Power (RSRP);
the determining module comprises:
a first determining submodule for determining the correction value as a negative number when the error metric is greater than a second error threshold;
a second determining submodule for determining the correction value as a positive number when the error metric is less than the second error threshold;
the sending module comprises:
a determination submodule configured to determine a sum of the first channel quality and the correction value as the second channel quality;
and the sending submodule is used for sending the second channel quality to the control terminal.
11. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.
12. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 3.
13. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 4 or 5.
14. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 4 or 5.
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