CN111447041B - Control method and device of modulation and coding strategy, storage medium and electronic equipment - Google Patents

Control method and device of modulation and coding strategy, storage medium and electronic equipment Download PDF

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Publication number
CN111447041B
CN111447041B CN201910041074.2A CN201910041074A CN111447041B CN 111447041 B CN111447041 B CN 111447041B CN 201910041074 A CN201910041074 A CN 201910041074A CN 111447041 B CN111447041 B CN 111447041B
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mcs level
channel quality
flow
control terminal
total
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CN111447041A (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)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The disclosure relates to a control method, a device, a storage medium and an electronic device for a modulation and coding strategy, and relates to the field of wireless communication, wherein the method is applied to a control terminal and comprises the following steps: updating the outer loop MCS level into the MCS level determined according to the error metric of the previous outer loop period according to the preset outer loop period, so that the total MCS level is updated into the sum of the outer loop MCS level and the inner loop MCS level, updating the total MCS level into the sum of the total MCS level corresponding to the previous correction period and the preset correction MCS level according to the preset correction period, and adjusting the total MCS level according to the first flow and the 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 spectral efficiency of data transmission can be improved.

Description

Control method and device of modulation and coding strategy, storage medium and electronic equipment
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and apparatus for controlling a modulation and coding policy, a storage medium, and an electronic device.
Background
In wireless communication technology, the communication quality is changed in real time due to the complex and varied environment in which the communication channel is located, which is affected by multipath fading and radio wave interference (e.g., additive white noise). In order to ensure the QoS (English: quality of Service, chinese: quality of service) of data transmission, the modulation mode and the coding rate between terminals need to be dynamically adjusted by using the AMC (English: adaptive Modulation and Coding, chinese: adaptive modulation coding) technology, when the quality of a communication channel is poor, a smaller modulation mode and coding rate are selected, and when the quality of the communication channel is good, a larger modulation mode and coding rate are selected. In the prior art, BS (Base Station, chinese) generally determines MCS (english: modulation and Coding Scheme, chinese: modulation and coding strategy) levels based on CQI (english: channel Quality Indicator, chinese: channel quality indication) reported by UE (User Equipment, english: user Equipment) measurement, and the CQI measured by the UE is inaccurate, which may result in inappropriate MCS level selection and reduced spectral efficiency of data transmission.
Disclosure of Invention
The disclosure aims to provide a control method, a device, a storage medium and an electronic device for a modulation and coding strategy, which are used for solving the problems of inaccurate MCS level and low frequency spectrum efficiency of data transmission in the prior art.
To achieve the above object, according to a first aspect of embodiments of the present disclosure, there is provided a control method of a modulation and coding strategy, applied to a control terminal, the method including:
updating an outer loop Modulation and Coding Strategy (MCS) level into an MCS level determined according to an error metric of the last outer loop period according to a preset outer loop period, so that a total MCS level is updated into a sum of the outer loop MCS level and an inner loop 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 loop MCS level is an MCS level determined according to channel quality sent by the user terminal;
updating the total MCS level into 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 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.
Optionally, the error metric includes: at least one of a bit error rate SER, a block error rate BLER, a packet error rate PER, the channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
the step of updating the MCS level of the outer loop modulation and coding strategy into the MCS level determined according to the error metric of the last outer loop period according to the preset outer loop period comprises the following steps:
reducing the outer loop MCS level when the error metric is greater than a first error threshold;
and 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, the total MCS level is adjusted to be the total MCS level corresponding to the last correction period;
and when the first flow is smaller than or equal to the second flow, maintaining the total MCS level corresponding to the current correction period.
According to a second aspect of embodiments of the present disclosure, there is provided a control method of a modulation and coding strategy, 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 before the current time, wherein the first channel quality is determined according to a pilot signal sent by a control terminal;
transmitting 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;
and repeatedly executing the steps of determining the correction value of the first channel quality according to the error measurement in the preset time before the current moment and transmitting 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 BLER, a packet error rate PER, the first channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
The determining the correction value of the first channel quality according to the error metric in the preset time before the current time comprises:
when the error metric is greater than a second error threshold, determining that the correction value is negative;
when the error metric is less than the second error threshold, determining that the correction value is a positive number;
the transmitting the second channel quality determined according to the first channel quality and the correction value to the control terminal 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 control apparatus for a modulation and coding strategy, applied to a control terminal, the apparatus including:
the outer loop control module is used for updating the outer loop modulation and coding strategy MCS level into the MCS level determined according to the error measurement of the last outer loop period according to the preset outer loop period so as to update the total MCS level into the sum of the outer loop MCS level and the inner loop MCS level, wherein the total MCS level is used for indicating a user terminal to carry out data communication with the control terminal, and the inner loop MCS level is the MCS level determined according to the 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 last correction period and the preset correction MCS level according to the preset correction period;
the adjustment module is used for 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 last 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.
Optionally, the error metric includes: at least one of a bit error rate SER, a block error rate BLER, a packet error rate PER, the channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
the outer loop control module includes:
a first updating sub-module configured to reduce the outer loop MCS level when the error metric is greater than a first error threshold;
a second updating sub-module, configured 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 sub-module, configured to adjust the total MCS level to the total MCS level corresponding to the last correction period when the first flow is greater than the second flow;
and the maintaining submodule is used for maintaining the total MCS level corresponding to the current correction period when the first flow is smaller than or equal to the second flow.
According to a fourth aspect of embodiments of the present disclosure, there is provided a control apparatus for a modulation and coding strategy, applied to a user terminal, the apparatus comprising:
the determining module is used for determining a correction value of first channel quality according to error measurement in a preset time before the current moment, wherein the first channel quality is determined according to a pilot signal sent by the control terminal;
a transmitting module, configured to transmit 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 ring modulation and coding strategy MCS level according to the second channel quality, and determines a total MCS level according to the inner ring 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 before the current moment and transmitting 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 BLER, a packet error rate PER, the first channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
the determining module includes:
a first determining sub-module configured to determine that the correction value is negative when the error metric is greater than a second error threshold;
a second determining submodule, configured to determine that the correction value is a positive number when the error metric is less than the second error threshold;
the transmitting module includes:
a determining submodule for determining 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 having stored thereon a computer program which, when executed by a processor, implements the steps of the control method of the modulation and coding strategy provided by the first aspect.
According to a sixth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when 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 embodiments of the present disclosure, there is provided an electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the control method of the modulation and coding strategy provided in the first aspect.
According to an eighth aspect of embodiments of the present disclosure, there is provided an electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the control method of the modulation and coding strategy provided in the second aspect.
Through the above technical solution, in the present disclosure, the 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 a channel quality determined by the user terminal according to a pilot signal sent by the 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 repeatedly executes steps of determining the correction value to send the second channel quality to the control terminal. After receiving the channel quality sent by the user terminal, the control terminal determines the inner loop MCS level, updates the outer loop MCS level into the MCS level determined according to the error measurement of the last outer loop period according to the preset outer loop period, so that the total MCS level is the sum of the outer loop MCS level and the inner loop MCS level, updates the total MCS level into 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, thereby improving the accuracy of the MCS level and the spectrum efficiency of data transmission.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit 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 chart illustrating another control method of modulation and coding strategy according to an exemplary embodiment;
FIG. 3 is a flow chart illustrating another control method of modulation and coding strategy according to an exemplary embodiment;
FIG. 4 is a flow chart illustrating a method of controlling a modulation and coding strategy according to an exemplary embodiment;
FIG. 5 is a flow chart illustrating another control method of modulation and coding strategy according to an exemplary embodiment;
FIG. 6 is a block diagram of a control device for a modulation and coding strategy according to an exemplary embodiment;
FIG. 7 is a block diagram of a control device of another modulation and coding strategy, according to an example embodiment;
FIG. 8 is a block diagram of a control device of another modulation and coding strategy, according to an example embodiment;
FIG. 9 is a block diagram of a control device for a modulation and coding strategy according to an exemplary embodiment;
FIG. 10 is a block diagram of a control device of another modulation and coding strategy, according to an example embodiment;
FIG. 11 is a block diagram of an electronic device, shown in accordance with an exemplary embodiment;
fig. 12 is a block diagram of an electronic device, according to an example embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
Before introducing the control method, the device, the storage medium and the electronic equipment of the modulation and coding strategy provided by the present disclosure, an application scenario related to each embodiment of the present disclosure is first 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 UE may be any terminal with a wireless communication function, for example, may be a smart phone, a smart watch, or a tablet computer, and the control terminal may be a BS or a UE, may be any terminal capable of serving as a wireless communication switching center, for example, may be a macro base station, a micro base station, a repeater, a remote radio base station, or may be a terminal such as a smart phone, a smart watch, or a tablet computer.
Fig. 1 is a flowchart illustrating a control method of a modulation and coding scheme according to an exemplary embodiment, and as shown in fig. 1, the method is applied to a control terminal, and includes:
step 101, updating the MCS level of the outer loop modulation and coding strategy into the MCS level determined according to the error metric of the last outer loop period according to the preset outer loop period, so that the total MCS level is updated into the sum of the outer loop MCS level and 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 the inner loop MCS level is the MCS level determined according to the channel quality sent by the user terminal.
For example, the control terminal continuously transmits the data signal and the CRS (english: cell Reference Signal, chinese: cell pilot signal) to the user terminal at a preset transmission 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 comprise, for example: at least one of parameters such as CQI (English: channel Quality Indicator, chinese: channel quality indication), IBLER (English: initial Block Error Rate, chinese: initial transmission data block error rate), ICIC (English: inter Cell Interference Coordination, chinese: inter-cell interference coordination), SNR (English: signal-Noise Ratio, chinese: signal-to-Noise Ratio), RSRP (English: reference Signal Receiving Power, chinese: reference Signal received power). The control terminal determines the inner loop MCS level according to the channel quality, for example, the inner loop MCS level may be determined by a table look-up method, and the table may store the correspondence between the channel quality and the inner loop MCS level in advance.
Then, the control terminal updates the outer loop MCS level according to a preset outer loop period (for example, may be 20 ms), where the outer loop MCS level may be an MCS level determined by the control terminal according to an error metric of the previous outer loop period. After updating the outer loop MCS level, the control terminal updates the total MCS level as: and the sum of the inner loop MCS level and the outer loop MCS level is transmitted to the user terminal, so that the user terminal can perform data communication with the control terminal according to the total MCS level (namely, the user terminal performs downlink modulation 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 will be appreciated that the initial value of the outer loop MCS level may be set to 0, and that in the first outer loop period, the total MCS level = inner loop MCS level +0, i.e. 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 value may be preset, when the error metric is greater than the threshold value, it is judged that the total MCS level is higher, the total MCS level should be reduced, then the outer loop MCS level may be determined as a negative value (for example, -2), when the error metric is less than the threshold value, it is judged that the total MCS level is lower, the total MCS level should be increased, then the outer loop MCS level may be determined as a positive value (for example, 3), and at this time, the total MCS level=the inner loop MCS level+the outer loop MCS level. In each outer loop period, step 101 is repeatedly performed, and the outer loop MCS level can be adjusted in real time to update the total MCS level.
Step 102, updating the total MCS level into 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 the first flow and the 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.
For example, when the resources transmitted by the communication channel are abundant, there may be a situation that part of the spectrum resources are not utilized, and in order to improve the utilization rate of the spectrum resources (that is, use all available frequency domain resources), the MCS level may be adjusted, so as to achieve the purpose of reducing the error metric and the time delay on the premise of meeting the QoS of the data transmission. Therefore, whether the frequency spectrum efficiency of the current data transmission is reasonable or not can be judged by measuring the flow rate when the user terminal and the control terminal perform data communication, so that the purpose of improving the data flow rate is achieved. 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 a sum of the total MCS level corresponding to the previous modification period and the modified MCS level according to a preset modification period (for example, 50 ms), 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 rate 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 rate when the user terminal and the control terminal carry out data communication according to the total MCS level corresponding to the previous correction period, so as to adjust the total MCS level. For example, when the first flow is greater than the second flow, the total MCS level may be adjusted to the total MCS level corresponding to the last modification period, and when the first flow is less than or equal to the second flow, the current total MCS level is maintained.
Fig. 2 is a flow chart illustrating another control method of modulation and coding strategy according to an exemplary embodiment, and as shown in fig. 2, step 101 may be implemented by:
in step 1011, the outer loop MCS level is reduced when the error metric is greater than the first error threshold.
Step 1012, increasing the outer loop MCS level when the error metric is less than the first error threshold.
For example, the channel quality may include: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP. The error metrics include: at least one of SER (English: symbol Error Rate, chinese: error Rate), BLER (English: block Error Rate, chinese: block Error Rate), PER (English: packet Error Rate, chinese: packet Error Rate). The outer loop MCS level is updated according to the outer loop period, which may be determined based on an error metric of the last outer loop period. For example, a first error threshold may be preset, the control terminal counts the error metric of the last outer loop period, determines a correction value (delta value) of the outer loop MCS level according to the relationship between the error metric and the first error threshold, and updates the outer loop MCS level to the sum of the outer loop MCS level of the last outer loop period and the correction value, i.e., MCS' Outer part ＝MCS Outer part +delta, where MCS' Outer part Indicating the updated outer loop MCS level, MCS Outer part The outer loop MCS level indicating the last outer loop period. 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, the outer loop MCS level is decreased, i.e. the delta value is set to a negative number (e.g. -3), when the error metric is greater than the first error threshold, and the outer loop MCS level is increased, i.e. the delta value is set to a positive number (e.g. 1).
Fig. 3 is a flow chart illustrating another control method of modulation and coding strategy according to an exemplary embodiment, and as shown in fig. 3, step 103 may include the steps of:
step 1031, when the first flow is greater than the second flow, adjusting the total MCS level to the total MCS level corresponding to the previous modification period.
And 1032, when the first flow is smaller than or equal to the second flow, maintaining the total MCS level corresponding to the current correction period.
For example, when the first flow is greater than the second flow, the total MCS level is adjusted to the total MCS level corresponding to the previous modification period, and when the first flow is less than or equal to the second flow, the total MCS level corresponding to the current modification period is maintained. After determining the total MCS level corresponding to the current modification period 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 the flow (i.e., the second flow) 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 flow with the flow (i.e., the first flow) counted by the control terminal in the previous modification period, so as to adjust the total MCS level. It may be understood that the initial value of the first flow is 0, and in the first modification period, the flow corresponding to the first modification period (i.e. the second flow) is determined, where the second flow is greater than the first flow, and then the total MCS level corresponding to the current modification period (i.e. the first modification period) is maintained. And in 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 aim of fully utilizing the frequency spectrum resources.
In summary, in the present disclosure, after receiving the channel quality sent by the user terminal, the control terminal determines the inner ring MCS level, updates the outer ring MCS level to the MCS level determined according to the error metric of the previous 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, where the total MCS level is used to instruct the user terminal and the control terminal to perform data communication, and updates 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 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 previous 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 as to improve the accuracy of the MCS level and the spectrum efficiency of data transmission.
Fig. 4 is a flowchart illustrating a control method of a modulation and coding strategy according to an exemplary embodiment, and 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 an error metric within a preset time period before a current time, wherein the first channel quality is determined according to a pilot signal sent by a control terminal.
Step 202, the second channel quality determined according to the first channel quality and the correction value is sent 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.
Steps 201 to 202 are repeatedly performed.
For example, the control terminal continuously transmits the data signal and the CRS to the user terminal according to the preset transmission frequency, the user terminal first determines the current first channel quality according to the received CRS, counts the error metric within a preset time period (for example, 10 ms) before the moment, determines the correction value of the first channel quality according to the error metric, determines the 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 as a period. For example, an error threshold may be set, and the correction value is determined to be negative when the error metric is greater than the error threshold, and positive when the error metric is less than the error threshold. Wherein, the first channel quality and the second channel quality may both include: CQI, IBLER, ICIC, SNR, RSRP, the error metric may comprise at least one of SER, BLER, PER. And the control terminal determines an inner loop 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.
Fig. 5 is a flowchart illustrating another control method of modulation and coding strategy according to an exemplary embodiment, and as shown in fig. 5, step 201 may be implemented by:
in step 2011, when the error metric is greater than the second error threshold, the correction value is determined to be negative.
In step 2012, when the error metric is less than the second error threshold, the correction value is determined to be positive.
Step 202 may be implemented by:
step 2021, determining the sum of the first channel quality and the correction value as the second channel quality.
Step 2022, the second channel quality is sent 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 excessively high error metric, so that the correction value may be determined as a negative number, so that the channel quality reported to the control terminal (i.e., the second channel quality) is reduced, 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 as a positive number, so that the channel quality reported to the control terminal is improved (i.e., the second channel quality), and when the error metric is equal to the second error threshold, it may be determined that the correction value is 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, the 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 a channel quality determined by the user terminal according to a pilot signal sent by the 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 ring MCS level according to the second channel quality, and determine a total MCS level according to the inner ring 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 perform the steps of determining the correction value to send the second channel quality to the control terminal. The accuracy of the MCS level, and the spectral efficiency of data transmission can be improved.
Fig. 6 is a block diagram of a control apparatus for modulation and coding scheme 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 an outer loop modulation and coding strategy MCS level to an MCS level determined according to an error metric of a previous outer loop period according to a preset outer loop period, so that a total MCS level is updated to be a sum of an outer loop MCS level and an 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 channel quality sent by the user terminal.
The correction control module 302 is configured to update the total MCS level to a sum of the total MCS level corresponding to the previous correction period and the preset correction MCS level according to the preset correction period.
The adjusting module 303 is configured to adjust the total MCS level according to a first flow and a second flow, where the first flow is a 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 a flow 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 of a control device of another modulation and coding strategy according to an exemplary embodiment, and as shown in fig. 7, the error metrics include: at least one of a bit error rate SER, a block error rate BLER, and a packet error rate PER, the channel quality includes: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP.
The outer loop control module 301 may include:
a first update sub-module 3011 is 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 is configured to increase the outer loop MCS level when the error metric is less than the first error threshold.
Fig. 8 is a block diagram of a control device of another modulation and coding strategy according to an exemplary embodiment, and as shown in fig. 8, the adjustment module 303 includes:
and the adjusting submodule 3031 is used for adjusting the total MCS level to be the total MCS level corresponding to the last correction period when the first flow is greater than the second flow.
A holding sub-module 3032, configured to hold the total MCS level corresponding to the current modification period when the first flow is less than or equal to the second flow.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
In summary, in the present disclosure, after receiving the channel quality sent by the user terminal, the control terminal determines the inner ring MCS level, updates the outer ring MCS level to the MCS level determined according to the error metric of the previous 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, where the total MCS level is used to instruct the user terminal and the control terminal to perform data communication, and updates 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 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 previous 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 as to improve the accuracy of the MCS level and the spectrum efficiency of data transmission.
Fig. 9 is a block diagram of a control apparatus for modulation and coding strategy according to an exemplary embodiment, and as shown in fig. 9, the apparatus 400 is applied to a user terminal, and includes:
the determining module 401 is configured to determine, according to the error metric within a preset time period before the current time, a correction value of a first channel quality, where the first channel quality is determined according to a pilot signal sent by the control terminal.
A transmitting module 402, configured to transmit 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 metric in the preset time period before the current moment and transmitting 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 of a control device of another modulation and coding strategy according to an exemplary embodiment, and as shown in fig. 10, the error metrics include: at least one of a bit error rate SER, a block error rate BLER, and a packet error rate PER, the first channel quality includes: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP.
The determining module 401 includes:
the first determining submodule 4011 is configured to determine that the correction value is negative when the error metric is greater than the second error threshold.
A second determining submodule 4012 is configured to determine that the correction value is positive when the error measure is smaller than the second error threshold.
The transmitting module 402 includes:
a determining submodule 4021 is configured to determine the sum of the first channel quality and the correction value as the second channel quality.
A transmitting submodule 4022, configured to transmit the second channel quality to the control terminal.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
In summary, in the present disclosure, the 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 a channel quality determined by the user terminal according to a pilot signal sent by the 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 ring MCS level according to the second channel quality, and determine a total MCS level according to the inner ring 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 perform the steps of determining the correction value to send the second channel quality to the control terminal. The accuracy of the MCS level, and the spectral efficiency of data transmission can be improved.
Fig. 11 is a block diagram of an electronic device 500, according to an example embodiment. As shown in fig. 11, the electronic device 500 may include: a processor 501, 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 to perform all or part of the steps in the control method of the modulation and coding strategy 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, which may include, for example, instructions for any application or method operating on the electronic device 500, as well as application-related data, such as contact data, messages sent and received, 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 (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), 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, the audio component being for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 502 or transmitted through the communication component 505. The audio assembly further comprises at least one speaker for outputting audio signals. The I/O interface 504 provides an interface between the processor 501 and other interface modules, which may be 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 (Near Field Communication, NFC for short), 2G, 3G or 4G, or a combination of one or more thereof, the corresponding communication component 505 may thus comprise: 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 (Application Specific Integrated Circuit, abbreviated as ASIC), digital signal processors (Digital Signal Processor, abbreviated as DSP), digital signal processing devices (Digital Signal Processing Device, abbreviated as DSPD), programmable logic devices (Programmable Logic Device, abbreviated as PLD), field programmable gate arrays (Field Programmable Gate Array, abbreviated as FPGA), controllers, microcontrollers, microprocessors, or other electronic components for performing the control method of the modulation and coding strategy described above and illustrated in fig. 4 or 5.
In another exemplary embodiment, a computer readable storage medium is also provided, comprising program instructions which, when executed by a processor, implement the steps of the control method of the modulation and coding strategy shown in fig. 4 or fig. 5 described above. For example, the computer readable storage medium may be the memory 502 including program instructions described above, which may be executed by the processor 501 of the electronic device 500 to implement the control method of the modulation and coding scheme shown in fig. 4 or fig. 5 described above.
In summary, in the present disclosure, the 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 a channel quality determined by the user terminal according to a pilot signal sent by the 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 ring MCS level according to the second channel quality, and determine a total MCS level according to the inner ring 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 perform the steps of determining the correction value to send the second channel quality to the control terminal. The accuracy of the MCS level, and the spectral efficiency of data transmission can be improved.
Fig. 12 is a block diagram of 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 each corresponding to a set of instructions. Furthermore, the processor 622 may be configured to execute the computer program to perform the control method of the modulation and coding strategy shown in fig. 1-3 described above.
In addition, the electronic device 600 may further include a power supply component 626 and a communication component 650, the power supply component 626 may be configured to perform power management of the electronic device 600, and the communication component 650 may be configured to enable communication of the electronic device 600, e.g., wired or wireless communication. In addition, the electronic device 600 may also include an input/output (I/O) interface 658. The electronic device 600 may operate based on an operating system stored in the memory 632, such as Windows Server, mac OS XTM, unixTM, linuxTM, and the like.
In another exemplary embodiment, a computer readable storage medium is also provided, comprising program instructions which, when executed by a processor, implement the steps of the control method of the modulation and coding strategy shown in fig. 1 to 3 described above. For example, the computer readable storage medium may be the memory 632 including the program instructions that are executable by the processor 622 of the electronic device 600 to implement the modulation and coding strategy control method shown in fig. 1-3.
In summary, in the present disclosure, after receiving the channel quality sent by the user terminal, the control terminal determines the inner ring MCS level, updates the outer ring MCS level to the MCS level determined according to the error metric of the previous 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, where the total MCS level is used to instruct the user terminal and the control terminal to perform data communication, and updates 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 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 previous 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 as to improve the accuracy of the MCS level and the spectrum efficiency of data transmission.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the present disclosure within the scope of the technical concept of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. While any combination between the various embodiments of the present disclosure is possible, it should also be considered as disclosed in the present disclosure, as long as it does not depart from the spirit of the present disclosure. The present disclosure is not limited to the exact construction that has been described above, but the scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. A control method of a modulation and coding strategy, applied to a control terminal, the method comprising:
updating an outer loop Modulation and Coding Strategy (MCS) level into an MCS level determined according to an error metric of the last outer loop period according to a preset outer loop period, so that a total MCS level is updated into a sum of the outer loop MCS level and an inner loop 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 loop MCS level is an MCS level determined according to channel quality sent by the user terminal; the error metric includes: at least one of a bit error rate SER, a block error rate BLER, a packet error rate PER, the channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
Updating the total MCS level into 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;
the total MCS level is adjusted 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;
adjusting the total MCS level according to the first traffic and the second traffic, including:
when the first flow is larger than the second flow, the total MCS level is adjusted to be the total MCS level corresponding to the last correction period;
and when the first flow is smaller than or equal to the second flow, maintaining the total MCS level corresponding to the current correction period.
2. The method of claim 1 wherein said updating the outer loop modulation and coding strategy MCS level to the MCS level determined based on the error metric of the last said outer loop period according to a preset outer loop period comprises:
Reducing the outer loop MCS level when the error metric is greater than a first error threshold;
and increasing the outer loop MCS level when the error metric is less than the first error threshold.
3. A method for controlling a modulation and coding strategy, applied to a user terminal, the method comprising:
determining a correction value of a first channel quality according to an error metric in a preset time before the current time, wherein the first channel quality is determined according to a pilot signal sent by a control terminal; the error metric includes: at least one of a bit error rate SER, a block error rate BLER, a packet error rate PER, the first channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
transmitting 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;
Repeatedly executing the step of determining a correction value of the first channel quality according to the error measurement in a preset time period before the current moment to send a second channel quality determined according to the first channel quality and the correction value to a control terminal;
the determining the correction value of the first channel quality according to the error metric in the preset time before the current time comprises:
when the error metric is greater than a second error threshold, determining that the correction value is negative;
and when the error metric is smaller than the second error threshold value, determining that the correction value is positive.
4. A method according to claim 3, wherein said transmitting a second channel quality determined from said first channel quality and said correction value to said control terminal comprises:
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.
5. A control apparatus for a modulation and coding scheme, applied to a control terminal, comprising:
the outer loop control module is used for updating the outer loop modulation and coding strategy MCS level into the MCS level determined according to the error measurement of the last outer loop period according to the preset outer loop period so as to update the total MCS level into the sum of the outer loop MCS level and the inner loop MCS level, wherein the total MCS level is used for indicating a user terminal to carry out data communication with the control terminal, and the inner loop MCS level is the MCS level determined according to the channel quality sent by the user terminal; the error metric includes: at least one of a bit error rate SER, a block error rate BLER, a packet error rate PER, the channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
The correction control module is used for updating the total MCS level into 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;
the adjustment module is used for 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 last 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 adjustment module includes:
an adjusting sub-module, configured to adjust the total MCS level to the total MCS level corresponding to the last correction period when the first flow is greater than the second flow;
and the maintaining submodule is used for maintaining the total MCS level corresponding to the current correction period when the first flow is smaller than or equal to the second flow.
6. The apparatus of claim 5, wherein the outer loop control module comprises:
a first updating sub-module configured to reduce the outer loop MCS level when the error metric is greater than a first error threshold;
A second updating sub-module, configured to increase the outer loop MCS level when the error metric is less than the first error threshold.
7. A control apparatus for a modulation and coding strategy, applied to a user terminal, the apparatus comprising:
the determining module is used for determining a correction value of first channel quality according to error measurement in a preset time before the current moment, wherein the first channel quality is determined according to a pilot signal sent by the control terminal; the error metric includes: at least one of a bit error rate SER, a block error rate BLER, a packet error rate PER, the first channel quality comprising: at least one of channel quality indication CQI, initial transmission data block error rate IBLER, inter-cell interference coordination ICIC, signal-to-noise ratio SNR and reference signal received power RSRP;
a transmitting module, configured to transmit 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 ring modulation and coding strategy MCS level according to the second channel quality, and determines a total MCS level according to the inner ring MCS level, where the total MCS level is used to instruct the user terminal to perform data communication with the control terminal;
Repeatedly executing the step of determining a correction value of the first channel quality according to the error measurement in a preset time period before the current moment to send a second channel quality determined according to the first channel quality and the correction value to a control terminal;
the determining module includes:
a first determining sub-module configured to determine that the correction value is negative when the error metric is greater than a second error threshold;
and the second determining submodule is used for determining that the correction value is positive when the error metric is smaller than the second error threshold value.
8. The apparatus of claim 7, wherein the transmitting module comprises:
a determining submodule for determining 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.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method of claim 1 or 2.
10. An electronic device, comprising:
a memory having a computer program stored thereon;
A processor for executing said computer program in said memory to carry out the steps of the method of claim 1 or 2.
11. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any one of claims 3 or 4.
12. An electronic device, comprising:
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 of any one of claims 3 or 4.
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