CN113824533A - Method, equipment and storage medium for determining Modulation Coding Scheme (MCS) - Google Patents
Method, equipment and storage medium for determining Modulation Coding Scheme (MCS) Download PDFInfo
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Abstract
The invention discloses a method, equipment and a storage medium for determining a Modulation and Coding Scheme (MCS). The method comprises the following steps: acquiring the utilization rate of a Resource Block (RB) in a wireless channel; when the RB utilization rate meets a preset limiting condition, determining an MCS limiting value; wherein the limitation condition comprises a first limitation condition, and the first limitation condition is: the RB utilization rate is less than a preset first utilization rate; determining an MCS value corresponding to the wireless channel; when the MCS value is greater than or equal to the MCS limit value, the determined MCS value is reduced, which is beneficial to obtaining better modulation coding effect and better adapting to the real environment of the wireless channel, and moreover, the determined MCS value is reduced, so that the data volume of each scheduling can be reduced, thereby increasing the scheduling times and smoothly scheduling and transmitting the flow.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, a device, and a storage medium for determining a modulation and coding scheme MCS.
Background
The wireless channel has strong time variation, the fading can reach dozens of or even dozens of dB in a short time, and the Adaptive Modulation and Coding (AMC) technology dynamically selects a proper Modulation and Coding Scheme (MCS) according to the time variation of the channel, so that the transmission efficiency of a communication system can be greatly improved. The basic principle is that the channel characteristics of data transmission are estimated at a receiving end and fed back to a sending end, and the sending end selects a corresponding MCS for data transmission according to the channel characteristics fed back by the receiving end, so that the overall throughput and transmission efficiency of the system are improved. However, the current AMC scheme shows a very different difference due to different design methods and considered factors, which causes the determined MCS to be possibly inaccurate, the coding effect is not good, and the method is difficult to adapt to the real environment of the wireless channel.
Disclosure of Invention
The embodiments of the present invention mainly aim to provide a method, a device, and a storage medium for determining a modulation and coding scheme MCS, which are adapted to a real environment of a wireless channel and improve the effect of modulation and coding.
In order to achieve the above object, an embodiment of the present invention provides a method for determining a modulation and coding scheme MCS, where the method includes: acquiring the utilization rate of a Resource Block (RB) in a wireless channel; when the RB utilization rate meets a preset limiting condition, determining an MCS limiting value; wherein the limitation condition comprises a first limitation condition, and the first limitation condition is: the RB utilization rate is less than a preset first utilization rate; (ii) a Determining an MCS value corresponding to the wireless channel; and when the MCS value is larger than or equal to the MCS limit value, reducing the determined MCS value.
In order to achieve the above object, an embodiment of the present invention further provides an apparatus for determining a modulation and coding scheme MCS, where the apparatus includes a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for implementing connection communication between the processor and the memory, and the program implements the steps of the foregoing method when executed by the processor.
To achieve the above object, the present invention provides a storage medium for a computer-readable storage, the storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the steps of the aforementioned method.
The method, the device and the storage medium for determining the Modulation and Coding Scheme (MCS) provided by the embodiment of the invention monitor the RB utilization rate by acquiring the RB utilization rate in a wireless channel, and determine the MCS limit value when the RB utilization rate meets the preset limit condition. The limiting conditions comprise a first limiting condition, and the first limiting condition is as follows: when the MCS value is greater than or equal to the MCS limit value, the determined MCS value is reduced, namely the MCS value actually applied in the data transmission process is less than the MCS limit value, so that a better modulation and coding effect is favorably obtained, and the real environment of the wireless channel is better adapted. And, the determined MCS value is reduced, so that the data amount of each scheduling can be reduced, the scheduling times are increased, the input data number of algorithms such as AGC (automatic gain control) and the like can be increased, and the functions of smooth scheduling and message transmission flow are also realized.
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FIG. 1 is a flowchart of a method for determining modulation coding scheme MCS according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a method for determining a modulation and coding scheme MCS according to a second embodiment of the present invention;
FIG. 3 is a flowchart of a method for determining modulation coding scheme MCS according to a third embodiment of the present invention;
FIG. 4 is a flowchart of a process corresponding to each cycle in the constraint mode according to the third embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for determining a modulation and coding scheme MCS according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
A first embodiment of the present invention relates to a method for determining a modulation and coding scheme MCS, including: acquiring the utilization rate of a Resource Block (RB) in a wireless channel; when the RB utilization rate is smaller than a preset first utilization rate, determining an MCS limit value; determining an MCS value corresponding to a wireless channel; and when the MCS value is greater than or equal to the MCS limit value, reducing the determined MCS value. The following describes implementation details of the method for determining the modulation coding scheme MCS according to the present embodiment, and the following description is provided only for easy understanding and is not necessary to implement the present embodiment.
The method for determining a modulation and coding scheme MCS in this embodiment is applied to a base station, and a scheduler is disposed in a Medium Access Control (MAC) layer in the base station, and the scheduler may execute the method for determining a modulation and coding scheme MCS in this embodiment. For example, for a scenario of uplink scheduling, that is, User Equipment (UE) needs to send data to a base station, the base station determines an MCS value, that is, determines a modulation scheme, a code rate, and efficiency, by executing the method for determining a modulation and coding scheme MCS in this embodiment. And the base station sends the finally determined MCS value to the user equipment, and the user equipment sends data to the base station according to the received MCS value. For a downlink scheduling scenario, that is, the base station needs to send data to the ue, the base station determines an MCS value by performing the method for determining a modulation and coding scheme MCS in this embodiment, and sends data to the ue according to the determined MCS value. The above is merely an exemplary application scenario, but not limited thereto.
The specific process of this embodiment is shown in fig. 1, and includes the following steps:
step 101: resource Block (RB) utilization in a wireless channel is obtained.
The Resource Block (RB) is a unit of frequency domain Resource allocation, a bandwidth of one Resource Block is 180kHz, and the Resource Block is composed of 12 subcarriers with a bandwidth of 15kHz and is a time slot in a time domain. The RB is used to carry traffic data, and the subcarrier is a unit used to carry traffic data. In the process of signal transmission, the signal is not directly transmitted, but the signal interacts with a fixed frequency wave, which is called loading, and such a fixed frequency wave is called carrier frequency.
In an example, when the user equipment needs to transmit the service data, the base station may allocate corresponding RBs to the user equipment for transmitting the service data, that is, the number of RBs available in the radio channel is constant, and when the service data is transmitted, the base station may obtain the number of RBs actually used in the radio channel within a preset time period, and further obtain the RB utilization rate of the radio channel within the preset time period according to the ratio of the number of RBs actually used in the radio channel to the number of RBs available in the radio channel. The preset time period may be set according to actual needs, for example, the preset time period may be a constant, or may be a variable or a value of a function determined by several factors, but this embodiment is not particularly limited to this. In a specific implementation, the base station may obtain the RB utilization in the radio channel after receiving the obtaining instruction, but not limited thereto.
Step 102: and when the RB utilization rate meets a preset limiting condition, determining the MCS limiting value.
The limiting conditions comprise a first limiting condition, and the first limiting condition is as follows: the RB utilization rate is less than a preset first utilization rate. The first utilization rate may be pre-stored in a scheduler of the base station, for example, the RB utilization threshold may be configured as the first utilization rate when the scheduler is started. Specifically, the first utilization rate may be set according to a specific application, for example, the base station may be configured according to processing capabilities of software and hardware of the base station and empirical data. The value is set either fixed or dynamically.
In a specific implementation, the base station may determine whether the RB utilization is less than a preset first utilization, and if the RB utilization is less than the preset first utilization, the current load is considered to be too light, and then the MCS limit value may be determined. The MCS limit value may be used to limit an MCS value applied to data transmission between the base station and the user equipment in a next period of time, and ensure that the MCS value applied to data transmission between the base station and the user equipment in the next period of time is smaller than the MCS limit value. If the RB utilization is greater than the preset first utilization, step 101 may be executed next to obtain the RB utilization in the radio channel.
In one example, the MCS limit may be determined by: acquiring the data volume scheduled through a wireless channel, and determining an MCS limit value according to the scheduled data volume; wherein, the more the scheduled data amount is, the larger the determined MCS limit value can be. In a specific implementation, the base station may obtain the data amount scheduled through the wireless channel within a preset time length, where the preset time length is the same as the preset time length mentioned in step 101. Since the number of schedulable bytes corresponding to different MCS values is constant, that is, the schedulable data amount corresponding to each different MCS value is constant. Therefore, according to the obtained scheduled data amount, a minimum MCS value that can schedule out the data amount may be selected as the determined MCS limit value.
In another example, the MCS limit may also be determined by: and acquiring the data volume scheduled through the wireless channel, and determining the MCS limit value according to the scheduled data volume and the preset first utilization rate. Assuming that the preset first utilization rate is 50% and the obtained scheduled data amount is 50 bytes, the determined MCS limit value may be the smallest MCS value among MCS values corresponding to which 50/50% can be scheduled, i.e., 100 bytes. In this example, the MCS limit value is determined by combining the scheduled data amount and the preset first utilization rate, so that the MCS limit value can be determined more accurately and reasonably, and the possibility that the RB utilization rate in the radio channel is greater than the first utilization rate after the MCS value corresponding to the radio channel is limited by the MCS limit value is improved, that is, the RB utilization rate after limitation can be in a normal range, so that the RB in the radio channel is reasonably utilized.
Step 103: and determining the MCS value corresponding to the wireless channel.
Specifically, the base station may dynamically select an appropriate modulation and coding scheme MCS as an MCS value corresponding to a radio channel according to the time-varying characteristic of the channel by the AMC technology. In a specific implementation, a base station may receive a Channel characteristic of a radio Channel fed back by a user equipment, where the Channel characteristic may also be referred to as a Channel parameter, and the base station determines a Quality of the radio Channel according to the received Channel parameter, and the Quality of the radio Channel may be represented by a Channel Quality Indicator (CQI). The CQIs of different levels correspond to different modulation schemes, code rates, and efficiencies, that is, MCS, and the MCS corresponding to the CQIs of different levels may refer to table 1. Therefore, after determining the CQI level of the wireless channel, the base station can determine the MCS value corresponding to the wireless channel through the lookup table 1. Wherein, the higher the CQI level, the higher the quality of a wireless channel, and therefore, the signal-to-noise ratio of the wireless channel can be represented by the CQI level. The signal-to-noise ratio is large, which proves that the quality condition of the wireless channel is better, so the selectable CQI grade is higher, and under the condition of good quality of the wireless channel, a higher-order modulation coding mode, namely a modulation coding mode corresponding to a higher CQI grade, can be selected, thereby achieving higher code rate and efficiency.
TABLE 1
Step 104: and when the MCS value is greater than or equal to the MCS limit value, reducing the determined MCS value.
Specifically, the base station may determine whether the determined MCS value is greater than or equal to the MCS limit value, and may decrease the determined MCS value if the MCS value is greater than or equal to the MCS limit value; wherein the reduced MCS value may be less than the MCS limit value. The base station may send the reduced MCS value to the user equipment, so that the user equipment may send data to the base station according to the reduced MCS value. If the MCS value is smaller than the MCS limit value, it indicates that the MCS limit value does not play a limiting role, and the determined MCS value does not need to be lowered, the base station may directly send the MCS value determined in step 103 to the user equipment, so that the user equipment may send data to the base station according to the received MCS value.
In a specific implementation, assuming that the MCS value determined in step 103 is the corresponding MCS value when the CQI level is 8 in table 1, decreasing the determined MCS value may be understood as: the CQI level is lowered, and the MCS value corresponding to the lowered CQI level may be used as the lowered MCS value.
The above examples in the present embodiment are only for convenience of understanding, and do not limit the technical aspects of the present invention.
It can be understood that, when the RB utilization ratio is less than the preset first utilization ratio, it can be considered that the current load is too light, and the processing capability of the radio channel at this time does not need to be very high, i.e. the MCS value actually applied when data transmission is performed between the base station and the user equipment does not need to be very high. Therefore, compared with the prior art, in the embodiment, the RB utilization rate in the wireless channel is obtained to monitor the RB utilization rate, and when the RB utilization rate is less than the preset first utilization rate, that is, the RB utilization rate is low, the MCS limit value is determined, so that when the load is light, the MCS value corresponding to the wireless channel can be limited by using the MCS limit value, and when the MCS value is greater than or equal to the MCS limit value, the determined MCS value is reduced, that is, the MCS value actually applied in the data transmission process is less than the MCS limit value, which is beneficial to obtaining a better modulation and coding effect, so that the method better adapts to the real environment of the wireless channel, and is beneficial to improving the RB utilization rate, and the RB utilization rate can be within a normal range.
In addition, in the prior art, the power of the signal received by the receiving side varies, and in order to enable the receiving side to demodulate data stably, the power of the signal at the receiving side needs to be stabilized. The power of the signal received by the receiving party can be automatically adjusted through Automatic Gain Control (AGC), so that the signal power of the receiving party is stable. However, the AGC in the prior art as a dynamic gain control scheme often fails to respond accurately due to insufficient input data. In this embodiment, when the load is light, that is, the RB utilization rate is less than the preset first utilization rate, and when the MCS value is greater than or equal to the MCS limit value, the determined MCS value is decreased, so that the amount of data scheduled at each time can be decreased, thereby increasing the number of times of scheduling, and correspondingly increasing the number of times of receiving data by the receiving party, so that the AGC can perform multiple learning and optimization by using the data received multiple times, thereby facilitating an accurate response to the received data. That is, the embodiment of the invention can provide more times of input data for the AGC when the load is light, and is also beneficial to improving the control performance of the AGC. Moreover, the determined MCS value is reduced, so that the demodulation capability is improved, and the functions of smooth scheduling and message transmission flow are also achieved.
The second embodiment of the present invention relates to a method for determining a modulation and coding scheme MCS, and the following describes implementation details of the method for determining a modulation and coding scheme MCS of the present embodiment, and the following description is provided only for easy understanding and is not necessary to implement the present embodiment.
Fig. 2 is a flowchart of a method for determining a modulation and coding scheme MCS in this embodiment, and includes:
step 201: and acquiring the RB utilization rate in the wireless channel in the current period.
That is, the base station may periodically obtain the RB utilization in the radio channel, for example, the base station may automatically obtain the RB utilization in the radio channel every preset time period. The periodic acquisition mode enables the base station to actively monitor the utilization rate of the RBs in the wireless channel in a regular manner.
In one example, the duration of the period may include a number of Transmission Time Intervals (TTI), which refers to the length of an independently decoded Transmission in a radio link; the duration of the period may also be understood as the preset duration. The base station can acquire the utilization rate of the RB in the wireless channel in the current period by the following modes: firstly, acquiring the RB utilization rate of a wireless channel in each TTI in the current period; and then, acquiring the RB utilization rate in the wireless channel in the current period according to the RB utilization rate in the wireless channel in each TTI and the weight corresponding to the RB utilization rate in the wireless channel in each TTI. And combining the weight of the RB utilization rate in the wireless channel in each TTI, the method is favorable for obtaining the RB utilization rate in the wireless channel in the current period more reasonably.
The weights corresponding to the RB utilization rates in the radio channels in each TTI may be set according to actual needs.
In an example, if the weights respectively corresponding to the RB utilization rates in the radio channels in the TTIs are the same and greater than 0, the RB utilization rate in the radio channel in the current period is obtained according to the weights respectively corresponding to the RB utilization rate in the radio channel in each TTI and the RB utilization rate in the radio channel in each TTI, which can be understood as: and taking the average value of the RB utilization rate in the wireless channel in each TTI as the RB utilization rate in the wireless channel in the current period. The RB utilization rate in the wireless channel in each TTI is averaged, and the average value is used as the RB utilization rate in the wireless channel in the current period, so that the RB utilization rate in the wireless channel in the current period can be measured more accurately and comprehensively.
In another example, the weights corresponding to the RB utilization rates in the radio channels in the TTIs may also be different, for example, if the RB utilization rate in a radio channel in one TTI in the current period is to be used as the RB utilization rate in the radio channel in the current period, the weight corresponding to the RB utilization rate in the radio channel in the TTI may be set to 1, and the weight corresponding to the RB utilization rates in the radio channels in other TTIs may be set to 0, which is not limited in this embodiment.
Step 202: and when the RB utilization rate meets a preset limiting condition, determining the MCS limiting value.
The limiting conditions comprise a first limiting condition, and the first limiting condition is as follows: the RB utilization rate is less than a preset first utilization rate.
In one example, the base station may first obtain a data amount scheduled by a radio channel in each TTI in a current period; next, the MCS limit value is determined based on the weights corresponding to the amount of data scheduled by the radio channel in each TTI and the amount of data scheduled by the radio channel in each TTI. In a specific implementation, the base station may determine the data amount scheduled by the wireless channel in the current period according to the weight corresponding to the data amount scheduled by the wireless channel in each TTI and the weight corresponding to the data amount scheduled by the wireless channel in each TTI, and determine the MCS limit value according to the data amount scheduled by the wireless channel in the current period. The determined MCS limit value may be an MCS limit value corresponding to a next period, and is used to limit an MCS value applied to data transmission between the base station and the user equipment in the next period.
The weights corresponding to the data amount scheduled in each TTI may be set according to actual needs.
In an example, the weights respectively corresponding to the data amount scheduled by the wireless channel in each TTI may all be the same and greater than 0, and the data amount scheduled by the wireless channel in the current period is obtained according to the weight respectively corresponding to the data amount scheduled by the wireless channel in each TTI and the data amount scheduled by the wireless channel in each TTI, which may be understood as: and taking the average value of the data amount scheduled by the wireless channel in each TTI as the data amount scheduled by the wireless channel in the current period by the base station. The data amount scheduled by the wireless channel in each TTI is averaged, and the average value is used as the data amount scheduled by the wireless channel in the current period, so that the data amount scheduled by the wireless channel in the current period can be more accurately and comprehensively measured.
In another example, the weights corresponding to the data amount scheduled by the radio channel in each TTI may also be different, for example, if the data amount scheduled by the radio channel in a certain TTI is to be the data amount scheduled in the current period, the weight corresponding to the data amount scheduled by the radio channel in the TTI may be set to 1, and the weight corresponding to the data amount scheduled by the radio channel in other TTIs may be set to 0, which is not limited in this embodiment.
Step 203: and determining the MCS value corresponding to the wireless channel in the next period.
Specifically, the base station may determine a CQI level according to a channel characteristic of a radio channel fed back by the user equipment in the next period, and look up table 1 according to the CQI level, thereby determining an MCS value corresponding to the radio channel in the next period.
In one example, the duration of the period may include several TTIs, and the MCS value corresponding to the radio channel in the next period may include: the MCS value corresponding to the radio channel in each TTI of the next period may be understood as an MCS value allocated by the base station for each TTI with reference to table 1.
Step 204: and when the MCS value is greater than or equal to the MCS limit value, reducing the determined MCS value.
In one example, the MCS value corresponding to the radio channel in the next period may be decreased if the MCS value corresponding to the radio channel in the next period is greater than or equal to the MCS limit value corresponding to the next period. That is, when the base station determines that the RB utilization rate of the current period is low, the base station uses the determined MCS limit value corresponding to the next period to limit the MCS value corresponding to the radio channel in the next period, so that the MCS value actually applied by the base station and the user equipment in the next period during data transmission is smaller than the MCS limit value corresponding to the next period.
In one example, if the base station allocates one MCS value for each TTI of the next period, the base station may limit the allocated MCS value for each TTI of the next period by using the MCS limit value corresponding to the next period, so that the MCS value actually applied by the base station and the user equipment during data transmission in each TTI of the next period is smaller than the MCS limit value corresponding to the next period.
The above examples in the present embodiment are only for convenience of understanding, and do not limit the technical aspects of the present invention.
Compared with the prior art, in this embodiment, when the base station determines that the RB utilization rate of the current period is low, the MCS limit value corresponding to the next period determined in the current period is used to limit the MCS value corresponding to the wireless channel in the next period, so that the MCS value applied by the base station and the user equipment in the next period during data transmission is smaller than the MCS limit value corresponding to the next period, which is beneficial to obtaining a better modulation and coding effect, better adapting to the real environment of the wireless channel, and improving the RB utilization rate, so that the RB utilization rate can be within a normal range. Furthermore, the periodic manner in this embodiment may automatically and regularly limit the MCS value corresponding to the wireless channel. Meanwhile, the utilization rate of the RB in the wireless channel in each TTI in the current period and the data volume scheduled by the wireless channel in each TTI are combined, so that the reasonable determination of the utilization rate of the RB in the wireless channel in the current period and the data volume scheduled by the wireless channel in the current period are facilitated, the determined MCS limit value is more reasonable and accurate, and the limit effect of the MCS limit value is better exerted.
The third embodiment of the present invention relates to a method for determining a modulation and coding scheme MCS, and the following describes implementation details of the method for determining a modulation and coding scheme MCS of the present embodiment, and the following description is provided only for easy understanding and is not necessary to implement the present embodiment.
The preset limiting conditions in this embodiment further include: a second limiting condition, the second limiting condition being: the RB utilization rate is smaller than the first utilization rate, or the RB utilization rate is larger than a preset second utilization rate, and the second utilization rate is larger than the first utilization rate. The second utilization rate can be understood as a higher threshold value of the utilization rate, and the first utilization rate can be understood as a lower threshold value of the utilization rate; the first utilization rate and the second utilization rate may be set according to actual needs, and this embodiment is not specifically limited to this. In consideration of the specific implementation, the size of the data volume transmitted by the air interface in a given interval (one period) is determined by an application, and may be large, small, or irregular for the air interface, so that the utilization rate of the RB in the radio channel may be smaller than the first utilization rate, larger than the first utilization rate and smaller than the second utilization rate, or larger than the second utilization rate. By setting the second limitation condition, the above 3 situations that may occur in the RB utilization in the radio channel are more comprehensively considered, so that the MCS value is more comprehensively limited according to the RB utilization in the radio channel.
In a specific implementation, the base station may periodically obtain the RB utilization of the resource block in the radio channel, and after the RB utilization of the radio channel in the current period meets the first constraint condition, when the RB utilization of the radio channel in a period after the current period meets the second constraint condition, determine the MCS limit value. For convenience of understanding, when the RB utilization in the radio channel in the current period satisfies the first restriction condition, that is, the RB utilization is less than the preset first utilization, it may be considered that the base station enters the restriction mode from the current period, and in the restriction mode, the MCS limit value is determined when the RB utilization in the radio channel satisfies the second restriction condition.
In one example, after determining the MCS limit value when the RB utilization in the radio channel in a period after the current period satisfies the second constraint, the method further includes: after meeting the preset quitting limiting condition, when the RB utilization rate in the wireless channel meets a first limiting condition, determining an MCS limiting value; wherein, the exit limiting conditions are as follows: and detecting that the MCS limit value is larger than the MCS value in N periods after the current period, wherein N is a natural number larger than 1, and the N periods are respectively corresponding to the MCS limit value and the MCS value. For convenience of understanding, when the base station determines that the RB utilization in the wireless channel satisfies the preset exit restriction condition, it may be considered that the base station exits the restriction mode, i.e., enters the non-restriction mode in which the base station determines the MCS restriction value upon determining that the RB utilization in the wireless channel satisfies the first restriction condition.
In an example, the flowchart of the method for determining the modulation and coding scheme MCS in this embodiment may refer to fig. 3, which includes:
step 301: and acquiring the RB utilization rate in the wireless channel in the current period.
Step 301 is substantially the same as step 201 in the second embodiment, and in order to avoid repetition, this embodiment is not described herein again.
Step 302: and when the RB utilization rate in the wireless channel in the current period is less than a preset first utilization rate, entering a preset limiting mode, and determining the MCS limiting value in the limiting mode.
That is, if the base station determines that the RB utilization rate in the radio channel in the current period is less than the preset first utilization rate, it determines to enter the restriction mode from the current period, and in the restriction mode, determines the MCS limit value.
In a specific implementation, in the restriction mode, when the RB utilization satisfies a preset second restriction condition, determining an MCS limit value, that is, when the RB utilization in the radio channel is less than the first utilization or when the RB utilization in the radio channel is greater than the preset second utilization, determining the MCS limit value; wherein the second utilization rate is greater than the first utilization rate. After each period, the base station calculates the RB utilization rate in the radio channel in the period, and when the calculated RB utilization rate of one period is less than the first utilization rate or greater than the second utilization rate from the time of entering the restricted mode to the time of exiting the restricted mode, the base station may determine an MCS limit value for limiting the MCS value corresponding to the next period of the period.
Specifically, when the RB utilization in the radio channel in the period is less than the first utilization, the base station may determine the MCS limit value corresponding to the next period of the period based on the data amount scheduled through the radio channel in the period. When the RB utilization in the radio channel in the period is greater than the second utilization, the base station may determine the MCS limit value corresponding to the next period of the period based on the amount of data scheduled through the radio channel in the period. The specific manner in which the base station obtains the data amount scheduled through the wireless channel in one period may refer to the manner mentioned in step 202 of the second embodiment, and in order to avoid repetition, this embodiment is not specifically limited to this.
It can be understood that, when the RB utilization in the radio channel in the period is less than the first utilization, the amount of data scheduled in the period acquired by the base station is less, and thus the MCS limit value determined based on the less amount of data is less. When the RB utilization rate in the radio channel in the period is greater than the second utilization rate, the base station acquires a larger amount of data scheduled in the period, and therefore the MCS limit value determined based on the larger amount of data is larger. In a specific implementation, when determining the MCS limit, the amount of data scheduled in the period and the first utilization rate may also be combined.
For understanding, in the restricted mode, the processing flow of the base station in each cycle may refer to fig. 4, which includes:
step 401: the RB utilization in the radio channel during the period is calculated.
In a specific implementation, the base station may calculate the RB utilization in the radio channel in the period after the period is ended.
Step 402: judging whether the RB utilization rate is smaller than a first utilization rate or not; if so, step 404 is performed, otherwise step 403 is performed.
If the RB utilization is less than the first utilization, the RB utilization is considered to be too low, and step 404 is executed.
Step 403: judging whether the RB utilization rate is greater than a second utilization rate; if so, step 404 is performed, otherwise the process flow for the cycle ends.
The second utilization rate may be understood as a higher threshold of the utilization rate, and the first utilization rate may be understood as a lower threshold of the utilization rate. If the RB utilization is greater than the second utilization, the RB utilization can be considered too high, and step 404 is performed. If the RB utilization ratio is less than the second utilization ratio, that is, the RB utilization ratio is greater than the first utilization ratio and less than the second utilization ratio, the RB utilization ratio is considered to be normal, and step 404 is not executed, that is, the limitation processing is not performed.
In a specific implementation, the first utilization and the second utilization may be stored in advance in the base station, for example in a scheduler of the base station. The first utilization rate and the second utilization rate may be set by a person skilled in the art according to actual needs, and the first utilization rate and the second utilization rate stored in the base station may also be adjusted according to actual needs, however, this embodiment is not specifically limited to this.
Step 404: the MCS limit value is determined.
That is, if the RB utilization is less than the first utilization, or the RB utilization is greater than the second utilization, the step is performed.
In a specific implementation, the base station controls, in a next period of the period, the MCS value corresponding to the radio channel in the next period to be smaller than the MCS limit value. For example, if the MCS value corresponding to the wireless channel in the next period of the period is greater than the MCS limit value, the MCS value may be decreased such that the decreased MCS value is less than the MCS limit value determined in step 404.
Step 303: and determining the MCS value corresponding to the wireless channel in the next period.
Step 304: and when the MCS value is greater than or equal to the MCS limit value, reducing the determined MCS value.
Step 305: and exiting the limiting mode when the MCS limiting value is detected to be larger than the MCS value in N periods.
Wherein, N periods all correspond to respective MCS limit value and MCS value, and N is a natural number larger than 1. That is, after entering the restricted mode, if the MCS limit value is detected to be greater than the MCS value for a plurality of periods, the restricted mode is exited. It is to be understood that if the MCS limit value is detected to be greater than the MCS value for a plurality of periods, the MCS limit value may be considered to be not limiting, and the limiting mode is exited. In a specific implementation, the N periods may be N consecutive periods.
The above examples in the present embodiment are only for convenience of understanding, and do not limit the technical aspects of the present invention.
Compared with the prior art, in the embodiment, by comparing the MCS limit values corresponding to the N periods with the MCS values, the information of the periods can be referred to, and when the preset quit limit condition is met, that is, the MCS limit values are detected to be larger than the MCS values in the N periods, the MCS limit values can be reasonably deduced to have no limit function, so that the limit mode can be quitted in time, that is, the preset limit condition is switched from the second limit condition to the first limit condition, so that the base station determines the MCS limit value when the RB utilization rate in the wireless channel meets the first limit condition. And the utilization rate range comprises two thresholds, wherein a lower threshold is a first utilization rate, and a higher threshold is a second utilization rate, so that various conditions possibly occurring in the RB utilization rate in the wireless channel can be considered more comprehensively, and the step of determining the MCS limit value can be executed aiming at the condition that the RB utilization rate is greater than the second utilization rate by setting the higher threshold, thereby being beneficial to avoiding frequent access of the limit mode.
In addition, those skilled in the art can understand that the steps of the above methods are divided for clarity, and the implementation can be combined into one step or split into some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, and the method is within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
A fourth embodiment of the present invention relates to an apparatus for determining a modulation and coding scheme MCS, as shown in fig. 5, including: at least one processor 501; and a memory 502 communicatively coupled to the at least one processor 501; the memory 502 stores instructions executable by the at least one processor 501, and the instructions are executed by the at least one processor 501, so that the at least one processor 501 can execute the above method for determining the modulation and coding scheme MCS.
The memory 502 and the processor 501 are coupled by a bus, which may include any number of interconnected buses and bridges that couple one or more of the various circuits of the processor 501 and the memory 502 together. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 501 is transmitted over a wireless medium through an antenna, which further receives the data and transmits the data to the processor 501.
The processor 501 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 502 may be used to store data used by processor 501 in performing operations.
A fifth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A method for determining a Modulation and Coding Scheme (MCS), comprising:
acquiring the utilization rate of a Resource Block (RB) in a wireless channel;
when the RB utilization rate meets a preset limiting condition, determining an MCS limiting value; the preset limiting conditions comprise first limiting conditions, and the first limiting conditions are as follows: the RB utilization rate is less than a preset first utilization rate;
determining an MCS value corresponding to the wireless channel;
and when the MCS value is larger than or equal to the MCS limit value, reducing the determined MCS value.
2. The method of claim 1, wherein the determining the MCS limit value comprises:
acquiring the data volume scheduled by the wireless channel;
and determining the MCS limit value according to the scheduled data volume.
3. The method of claim 2, wherein the determining the MCS limit value according to the scheduled data amount comprises:
and determining the MCS limit value according to the scheduled data volume and the first utilization rate.
4. The method of claim 1, wherein the obtaining the utilization rate of Resource Blocks (RBs) in the wireless channel comprises:
acquiring the RB utilization rate in the wireless channel in the current period;
the determining the MCS value corresponding to the wireless channel includes:
and determining the MCS value corresponding to the wireless channel in the next period.
5. The method of claim 4, wherein the period duration includes a plurality of Transmission Time Intervals (TTIs), and the obtaining the utilization rate of the RBs in the radio channel in the current period comprises:
acquiring the RB utilization rate in the wireless channel in each TTI in the current period;
and acquiring the RB utilization rate in the wireless channel in the current period according to the RB utilization rate in the wireless channel in each TTI and the weights corresponding to the RB utilization rate in the wireless channel in each TTI.
6. The method of claim 4, wherein the period duration comprises a plurality of Transmission Time Intervals (TTIs), and wherein the determining the MCS limit value comprises:
acquiring the data volume scheduled by the wireless channel in each TTI in the current period;
and determining the MCS limit value according to the weight corresponding to the data quantity scheduled by the wireless channel in each TTI and the data quantity scheduled by the wireless channel in each TTI.
7. The method of claim 1, wherein the preset constraint further comprises: a second limiting condition, wherein the second limiting condition is as follows: the RB utilization rate is smaller than the first utilization rate, or the RB utilization rate is larger than a preset second utilization rate, and the second utilization rate is larger than the first utilization rate;
the acquiring Resource Block (RB) utilization rate in a wireless channel comprises the following steps:
periodically acquiring the RB utilization rate in the wireless channel;
when the RB utilization rate meets a preset limiting condition, determining an MCS limiting value, including:
and after the RB utilization rate in the wireless channel in the current period meets the first limiting condition, when the RB utilization rate in the wireless channel in the period after the current period meets the second limiting condition, determining an MCS limiting value.
8. The method of claim 7, wherein after determining the MCS limit value when the RB utilization in the wireless channel in the period after the current period satisfies the second limit condition, the method further comprises:
after meeting a preset exit limiting condition, when the RB utilization rate in the wireless channel meets the first limiting condition, determining an MCS limiting value; wherein the exit restriction condition is: and detecting that the MCS limit value is larger than the MCS value in N periods after the current period, wherein N is a natural number larger than 1, and the N periods correspond to the respective MCS limit value and the MCS value.
9. An apparatus for determining a modulation coding scheme, MCS, comprising a memory, a processor, a program stored on the memory and executable on the processor, and a data bus for enabling communication of a connection between the processor and the memory, the program, when executed by the processor, implementing the steps of the method for determining a modulation coding scheme, MCS, as claimed in any one of claims 1-8.
10. A storage medium for computer readable storage, wherein the storage medium stores one or more programs, which are executable by one or more processors to implement the steps of the method of determining modulation coding scheme, MCS, of any one of claims 1-8.
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| CN202010568633.8A CN113824533A (en) | 2020-06-19 | 2020-06-19 | Method, equipment and storage medium for determining Modulation Coding Scheme (MCS) |
| PCT/CN2021/079489 WO2021253877A1 (en) | 2020-06-19 | 2021-03-08 | Method and device for determining modulation and coding scheme (mcs), and storage medium |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647796A (en) * | 2011-02-21 | 2012-08-22 | 中兴通讯股份有限公司 | Method and device for upstream resource allocation |
| CN102752874A (en) * | 2011-04-22 | 2012-10-24 | 中兴通讯股份有限公司 | Physical downlink shared channel (PDSCH) scheduling method and device |
| US20150282202A1 (en) * | 2012-10-26 | 2015-10-01 | Deshan Miao | Scheduling Coordination |
| US20160219563A1 (en) * | 2015-01-28 | 2016-07-28 | Zulfiquar Sayeed | System and method for controlling an operation of an application by forecasting a smoothed transport block size |
| CN106550467A (en) * | 2016-10-31 | 2017-03-29 | 上海华为技术有限公司 | A kind of resource regulating method and base station |
| CN107800514A (en) * | 2017-11-16 | 2018-03-13 | 中国联合网络通信集团有限公司 | A kind of transmission method of downlink data and passback base station |
| US20190059020A1 (en) * | 2016-04-25 | 2019-02-21 | Huawei Technologies Co., Ltd. | Transport block generation method and apparatus |
| WO2019197027A1 (en) * | 2018-04-12 | 2019-10-17 | Nokia Technologies Oy | Methods and apparatuses for selective modulation and coding scheme (mcs) exclusion |
| CN110891306A (en) * | 2018-09-07 | 2020-03-17 | 成都鼎桥通信技术有限公司 | Method, base station and storage medium for downlink coverage adaptive adjustment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103079279B (en) * | 2012-12-20 | 2016-12-28 | 上海大唐移动通信设备有限公司 | A kind of resource allocation methods and device |
| CN104980247B (en) * | 2014-04-04 | 2019-11-22 | 北京三星通信技术研究有限公司 | Method, base station, terminal and the system of adaptive adjustment modulation coding scheme and reference signal pattern |
| US10848228B2 (en) * | 2018-02-16 | 2020-11-24 | Qualcomm Incorporated | Modulation and coding scheme and channel quality indicator for high reliability |
-
2020
- 2020-06-19 CN CN202010568633.8A patent/CN113824533A/en active Pending
-
2021
- 2021-03-08 WO PCT/CN2021/079489 patent/WO2021253877A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647796A (en) * | 2011-02-21 | 2012-08-22 | 中兴通讯股份有限公司 | Method and device for upstream resource allocation |
| CN102752874A (en) * | 2011-04-22 | 2012-10-24 | 中兴通讯股份有限公司 | Physical downlink shared channel (PDSCH) scheduling method and device |
| US20150282202A1 (en) * | 2012-10-26 | 2015-10-01 | Deshan Miao | Scheduling Coordination |
| US20160219563A1 (en) * | 2015-01-28 | 2016-07-28 | Zulfiquar Sayeed | System and method for controlling an operation of an application by forecasting a smoothed transport block size |
| US20190059020A1 (en) * | 2016-04-25 | 2019-02-21 | Huawei Technologies Co., Ltd. | Transport block generation method and apparatus |
| CN106550467A (en) * | 2016-10-31 | 2017-03-29 | 上海华为技术有限公司 | A kind of resource regulating method and base station |
| CN107800514A (en) * | 2017-11-16 | 2018-03-13 | 中国联合网络通信集团有限公司 | A kind of transmission method of downlink data and passback base station |
| WO2019197027A1 (en) * | 2018-04-12 | 2019-10-17 | Nokia Technologies Oy | Methods and apparatuses for selective modulation and coding scheme (mcs) exclusion |
| CN110891306A (en) * | 2018-09-07 | 2020-03-17 | 成都鼎桥通信技术有限公司 | Method, base station and storage medium for downlink coverage adaptive adjustment |
Non-Patent Citations (3)
| Title |
|---|
| NOKIA SIEMENS NETWORKS, NOKIA: "R1-121296 "Comparison of peak rate reduction methods for low-cost MTC"", 3GPP TSG_RAN\\WG1_RL1, no. 1, 20 March 2012 (2012-03-20) * |
| 庞晓丹;李薇薇;孙茜;田霖;: "LTE无线网络虚拟化中切片调度策略", 电信科学, no. 02, 20 February 2017 (2017-02-20) * |
| 李园园;金杰;苏寒松;马康;: "LTE系统下行基于调度度量值的资源分配方案", 计算机工程与设计, no. 12, 16 December 2014 (2014-12-16) * |
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