WO2021253877A1 - 确定调制编码方式mcs的方法、设备和存储介质 - Google Patents

确定调制编码方式mcs的方法、设备和存储介质 Download PDF

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Publication number
WO2021253877A1
WO2021253877A1 PCT/CN2021/079489 CN2021079489W WO2021253877A1 WO 2021253877 A1 WO2021253877 A1 WO 2021253877A1 CN 2021079489 W CN2021079489 W CN 2021079489W WO 2021253877 A1 WO2021253877 A1 WO 2021253877A1
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mcs
utilization rate
wireless channel
determining
value
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PCT/CN2021/079489
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English (en)
French (fr)
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田旌熙
鲍国超
戴华亮
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中兴通讯股份有限公司
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Publication of WO2021253877A1 publication Critical patent/WO2021253877A1/zh

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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
    • 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
    • H04L1/0015—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

Definitions

  • This application relates to the field of communications, and in particular to a method, device and storage medium for determining the modulation and coding mode MCS.
  • the wireless channel has a strong time-varying nature, and the fading can reach ten or even several decibels (dB) in a short time.
  • Choosing an appropriate modulation and coding scheme can greatly improve the transmission efficiency of the communication system.
  • the basic principle is to estimate the channel characteristics of data transmission at the receiving end and feed it back to the transmitting end.
  • the transmitting end selects the corresponding MCS for data transmission according to the channel characteristics fed back by the receiving end, which improves the overall throughput and transmission efficiency of the system.
  • the current AMC scheme due to different design methods and consideration factors, exhibits vastly different differences, resulting in the determined MCS may be inaccurate, the coding effect is not good, and it is difficult to adapt to the real environment of the wireless channel.
  • an embodiment of the present application provides a method for determining a modulation and coding scheme MCS.
  • the method includes: obtaining a resource block RB utilization rate in a wireless channel; when the RB utilization rate satisfies a preset restriction condition, Determine the MCS limit value; wherein the limit condition includes a first limit condition, and the first limit condition is: the RB utilization rate is less than a preset first utilization rate; and determine the 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.
  • the embodiment of the present application also proposes a device for determining a modulation and coding scheme MCS.
  • the device includes a memory, a processor, a program that is stored in the memory and can run on the processor, and is used to implement the processing.
  • a data bus for connection and communication between the processor and the memory, and the steps of the foregoing method are implemented when the program is executed by the processor.
  • This application provides a storage medium for computer-readable storage.
  • the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the foregoing method. step.
  • FIG. 1 is a flowchart of a method for determining a modulation and coding mode MCS provided by the first embodiment of the present application;
  • FIG. 2 is a flowchart of a method for determining a modulation and coding mode MCS provided by a second embodiment of the present application;
  • FIG. 3 is a flowchart of a method for determining a modulation and coding mode MCS provided by a third embodiment of the present application
  • Fig. 5 is a schematic structural diagram of a device for determining a modulation and coding mode MCS provided by a fourth embodiment of the present application.
  • the main purpose of the embodiments of the present application is to propose a method, device, and storage medium for determining the modulation and coding mode MCS, which aims to adapt to the real environment of the wireless channel and improve the effect of modulation and coding.
  • the method, device, and storage medium for determining the modulation and coding mode MCS proposed in the embodiments of the present application monitor the RB utilization rate by acquiring the RB utilization rate in the wireless channel, and determine the MCS when the RB utilization rate meets the preset restriction conditions.
  • the restriction conditions include the first restriction condition.
  • the first restriction condition is: the RB utilization rate is less than the preset first utilization rate, that is, when the RB utilization rate is low, the MCS restriction value is determined so that the MCS restriction can be used when the load is light.
  • the value limits the MCS value corresponding to the wireless channel.
  • the determined MCS value is reduced, that is, the MCS value actually used in the data transmission process is less than the MCS limit value, which is beneficial to obtain better Modulation and coding effect, so as to better adapt to the real environment of the wireless channel.
  • reducing the determined MCS value makes it possible to reduce the amount of data scheduled each time, thereby increasing the number of scheduling, increasing the number of input data for algorithms such as AGC, and smoothing the scheduling and packet transmission traffic.
  • the first embodiment of the present application relates to a method for determining a modulation and coding scheme MCS, including: obtaining a resource block (Resource Block, abbreviated: RB) utilization rate in a wireless channel; when the RB utilization rate is less than a preset first utilization rate , Determine the MCS limit value; determine the MCS value corresponding to the wireless channel; when the MCS value is greater than or equal to the MCS limit value, reduce the determined MCS value.
  • RB resource block
  • the method for determining the modulation and coding mode MCS in this embodiment is applied to a base station.
  • the Media Access Control (MAC layer) in the base station is provided with a scheduler, and the scheduler can execute the The method of determining the modulation and coding method MCS.
  • the base station determines the MCS value by executing the method of determining the modulation and coding mode MCS in this embodiment, that is, determining the modulation mode, Code rate, efficiency.
  • 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.
  • the base station determines the MCS value by executing the method of determining the modulation and coding mode MCS in this embodiment, and sends data to the user equipment according to the determined MCS value.
  • the base station determines the MCS value by executing the method of determining the modulation and coding mode MCS in this embodiment, and sends data to the user equipment according to the determined MCS value.
  • Step 101 Obtain the resource block RB utilization rate in the wireless channel.
  • a resource block is a unit of resource allocation in the frequency domain.
  • a resource block has a bandwidth of 180 kilohertz (kHz), is composed of 12 subcarriers with a bandwidth of 15 kHz, and is a time slot in the time domain.
  • the RB is used to carry service data
  • the subcarrier is a unit used to carry the service data.
  • the signal In the process of signal transmission, instead of directly transmitting the signal, the signal interacts with a wave of a fixed frequency. This process is called loading. Such a wave of fixed frequency is called the carrier frequency.
  • the base station when the user equipment needs to transmit service data, the base station can allocate corresponding RBs for the user equipment to transmit service data, that is, the number of RBs available in the wireless channel is certain.
  • the base station The number of RBs actually used in the wireless channel within the preset duration can be obtained, and then the RB utilization rate in the wireless channel within the preset duration can be obtained according to the ratio of the number of RBs actually used in the wireless channel to the number of RBs available in the wireless channel .
  • the preset duration can be set according to actual needs, for example, it can be a constant, it can also be a variable or the value of a function determined by several factors, but this embodiment does not specifically limit this.
  • the base station may obtain the RB utilization rate in the wireless channel after receiving the obtaining instruction, but it is not limited to this.
  • Step 102 Determine the MCS limit value when the RB utilization rate meets the preset limit condition.
  • the restriction condition includes a first restriction condition, and the first restriction condition is: the RB utilization rate is less than the preset first utilization rate.
  • the first utilization rate may be pre-stored in the scheduler of the base station.
  • the RB utilization rate threshold may be configured as the first utilization rate when the scheduler is started.
  • the size of the first utilization rate can be set according to specific application conditions.
  • the base station can set the value fixedly or dynamically according to its own software and hardware processing capabilities and empirical data.
  • the base station may determine whether the RB utilization rate is less than the preset first utilization rate, and if the RB utilization rate is less than the preset first utilization rate, and considers that the current load is too light, the MCS limit value may be determined.
  • the MCS limit value can be used to limit the MCS value applied for data transmission between the base station and the user equipment in the next period of time, and ensure that the MCS value applied for the data transmission between the base station and the user equipment in the next period of time is less than the MCS Limit value. If the RB utilization rate is greater than the preset first utilization rate, then step 101 may be executed to obtain the RB utilization rate in the wireless channel.
  • the MCS limit value can be determined in the following manner: the amount of data scheduled through the wireless channel is obtained, and the MCS limit value is determined according to the amount of scheduled data; wherein, the more the amount of scheduled data, the greater the determined MCS limit value. big.
  • the base station can obtain the amount of data scheduled through the wireless channel within a preset time period, where the preset time period is the same as the preset time period mentioned in step 101. Because the number of schedulable bytes corresponding to different MCS values is certain, that is, the amount of schedulable data corresponding to each different MCS value is certain. Therefore, according to the acquired scheduled data volume, a minimum MCS value that can transfer these data volumes can be selected as the determined MCS limit value.
  • Step 103 Determine the MCS value corresponding to the wireless channel.
  • the base station can dynamically select an appropriate modulation and coding mode MCS according to the time-varying nature of the channel according to the AMC technology, as the MCS value corresponding to the wireless channel.
  • the base station can receive the channel characteristics of the wireless channel fed back by the user equipment.
  • the channel characteristics can also be referred to as channel parameters.
  • the base station determines the quality of the wireless channel according to the received channel parameters.
  • the quality of the wireless channel can use the channel quality indicator ( Channel Quality Indicator (abbreviated as: CQI) means.
  • CQI Channel Quality Indicator
  • Different levels of CQI correspond to different modulation modes, code rates, and efficiencies, that is, MCS.
  • MCS corresponding to different levels of CQI, refer to Table 1.
  • the base station can determine the MCS value corresponding to the wireless channel by looking up Table 1.
  • the higher the CQI level the higher the quality of a wireless channel. Therefore, the CQI level can be used to represent the signal-to-noise ratio of the wireless channel.
  • the signal-to-noise ratio is large, which proves that the quality of the wireless channel is relatively good, so the CQI level that can be selected is relatively high.
  • Step 104 When the MCS value is greater than or equal to the MCS limit value, reduce the determined MCS value.
  • the base station can determine whether the determined MCS value is greater than or equal to the MCS limit value. If the MCS value is greater than or equal to the MCS limit value, the determined MCS value can be reduced; wherein the reduced MCS value can be less than the MCS limit value.
  • the base station can send the reduced MCS value to the user equipment, so that the user equipment can send data to the base station according to the reduced MCS value. If the MCS value is less than the MCS limit value, it means that the MCS limit value does not have a limiting effect, and there is no need to reduce the determined MCS value.
  • the base station can directly send the MCS value determined in step 103 to the user equipment, so that the user equipment can be based on the received MCS value Send data to the base station.
  • reducing the determined MCS value can be understood as: reducing the CQI level, and the MCS corresponding to the reduced CQI level The value can be used as the reduced MCS value.
  • this embodiment monitors the RB utilization rate by acquiring the RB utilization rate in the wireless channel.
  • the MCS limit value is determined so that the When the load is light, the MCS limit value can be used to limit the MCS value corresponding to the wireless channel.
  • the determined MCS value is reduced, that is, the MCS value actually used in the data transmission process is less than the MCS value.
  • the limit value is beneficial to obtain better modulation and coding effects, thereby better adapting to the real environment of the wireless channel, and also beneficial to improving the RB utilization rate, so that the RB utilization rate can be within a normal range.
  • the signal power received by the receiver will vary.
  • the signal power of the receiver needs to be stabilized.
  • AGC Automatic Gain Control
  • the power of the signal received by the receiver can be automatically adjusted to stabilize the signal power of the receiver.
  • AGC often fails to make accurate responses due to insufficient input data.
  • the load is light, that is, the RB utilization rate is less than the preset first utilization rate.
  • the determined MCS value is reduced, so that the amount of data scheduled each time can be reduced, thereby increasing
  • the number of scheduling correspondingly can increase the number of times the receiver receives data, so that the AGC can use the data received multiple times to perform multiple learning and optimization, which is beneficial to accurately respond to the received data. That is, the embodiment of the present application can provide more input data for the AGC when the load is light, and it is also beneficial to improve the control performance of the AGC.
  • by reducing the determined MCS value it is also beneficial to improve the demodulation capability, and also plays a role in smoothing scheduling and message transmission traffic.
  • the second embodiment of the present application relates to a method for determining a modulation and coding method MCS.
  • the following describes the implementation details of the method for determining a modulation and coding method MCS in this embodiment.
  • the following content is provided only for ease of understanding and implementation details, not implementation A must for this program.
  • Fig. 2 For the flowchart of the method for determining the modulation and coding mode MCS in this embodiment, refer to Fig. 2, which includes the following steps.
  • Step 201 Obtain the RB utilization rate in the wireless channel in the current period.
  • the base station can periodically obtain the RB utilization rate in the wireless channel. For example, the base station can automatically obtain the RB utilization rate in the wireless channel within the preset period of time.
  • the periodic acquisition method allows the base station to actively monitor the RB utilization rate in the wireless channel on a regular basis.
  • the duration of the cycle may include several transmission time intervals (Transmission Time Interval, TTI for short).
  • TTI refers to the length of an independent decoding transmission in the wireless link; wherein, the duration of the cycle can also be understood as The preset duration mentioned above.
  • the base station can obtain the RB utilization rate in the wireless channel in the current cycle in the following ways: first, obtain the RB utilization rate in the wireless channel in each TTI in the current cycle; then, according to the RB utilization rate in the wireless channel in each TTI and each TTI The weights corresponding to the RB utilization rates in the internal wireless channel are respectively used to obtain the RB utilization rates in the wireless channel in the current period. Combining the weight of the RB utilization rate in the wireless channel in each TTI is beneficial to obtain a more reasonable RB utilization rate in the wireless channel in the current period.
  • the weights corresponding to the RB utilization rates in the wireless channels in each TTI can be set according to actual needs.
  • the weights corresponding to the RB utilization rates in the wireless channels in each TTI are the same and greater than 0, and the RB utilization rates in the wireless channels in each TTI correspond to the RB utilization rates in the wireless channels in each TTI.
  • the RB utilization rate in the wireless channel in the current period it can be understood as: 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 weights corresponding to the RB utilization rates in the radio channels in each TTI may also be different. For example, if the RB utilization rate in the radio channel in a certain TTI in the current period is taken as the radio channel in the current period The weight corresponding to the RB utilization rate in the wireless channel in the TTI can be set to 1, and the weight corresponding to the RB utilization rate in the wireless channel in other TTIs can be set to 0. However, this embodiment does not Make specific restrictions.
  • Step 202 When the RB utilization rate meets the preset restriction condition, determine the MCS restriction value.
  • the restriction condition includes a first restriction condition, and the first restriction condition is: the RB utilization rate is less than the preset first utilization rate.
  • the base station may first obtain the amount of data scheduled through the wireless channel in each TTI in the current cycle; then, according to the amount of data scheduled through the wireless channel in each TTI and the amount of data scheduled through the wireless channel in each TTI, respectively correspond to The weight determines the MCS limit value.
  • the base station can first determine the amount of data scheduled through the wireless channel in the current cycle according to the weights corresponding to the amount of data scheduled through the wireless channel in each TTI and the amount of data scheduled through the wireless channel in each TTI. Determine the MCS limit value based on the amount of data scheduled through the wireless channel.
  • the determined MCS limit value may be the MCS limit value corresponding to the next cycle, which is used to limit the MCS value applied for data transmission between the base station and the user equipment in the next cycle.
  • the weights corresponding to the amount of data scheduled in each TTI can be set according to actual needs.
  • the weights corresponding to the amount of data scheduled through the wireless channel in each TTI may be the same and greater than 0. Then, according to the amount of data scheduled through the wireless channel in each TTI and the amount of data scheduled through the wireless channel in each TTI, respectively Corresponding weights, to obtain the amount of data scheduled through the wireless channel in the current cycle, can be understood as: taking the average of the amount of data scheduled through the wireless channel in each TTI as the amount of data scheduled through the wireless channel by the base station in the current cycle. By averaging the amount of data scheduled through the wireless channel in each TTI, and taking the average value as the amount of data scheduled through the wireless channel in the current period, it is helpful to more accurately and comprehensively measure the amount of data scheduled through the wireless channel in the current period. .
  • the weights corresponding to the amount of data scheduled through the wireless channel in each TTI may also be different. For example, if the amount of data scheduled through the wireless channel in a certain TTI is taken as the amount of data scheduled in the current period, then The weight corresponding to the amount of data scheduled through the wireless channel in this TTI may be set to 1, and the weight corresponding to the amount of data scheduled through the wireless channel in other TTIs may be set to 0, but this embodiment does not specifically limit this.
  • Step 203 Determine the MCS value corresponding to the wireless channel in the next period.
  • the base station may determine the CQI level according to the channel characteristics of the wireless channel fed back by the user equipment in the next cycle, and look up the foregoing Table 1 according to the CQI level to determine the MCS value corresponding to the wireless channel in the next cycle.
  • the duration of the period may include several TTIs
  • the MCS value corresponding to the wireless channel in the next period may include: the MCS value corresponding to the wireless channel in each TTI in the next period, which can be understood as the base station for each TTI TTI will refer to Table 1 above to assign an MCS value.
  • Step 204 When the MCS value is greater than or equal to the MCS limit value, reduce the determined MCS value.
  • the MCS value corresponding to the wireless channel in the next cycle when the MCS value corresponding to the wireless channel in the next cycle is greater than or equal to the MCS limit value corresponding to the next cycle, the MCS value corresponding to the wireless channel in the next cycle can be reduced. That is to say, when the base station determines that the RB utilization rate in the current cycle is low, it uses the determined MCS limit value corresponding to the next cycle to limit the MCS value corresponding to the wireless channel in the next cycle, so that the base station and the user equipment are in the next cycle. The MCS value actually applied during data transmission is less than the MCS limit value corresponding to the next cycle.
  • the base station can use the MCS limit value corresponding to the next cycle to limit the assigned MCS value for each TTI in the next cycle, so that the The MCS value actually applied by the base station and the user equipment during data transmission in each TTI of a cycle is smaller than the MCS limit value corresponding to the next cycle.
  • the base station when the base station determines that the RB utilization rate of the current cycle is low, it uses the MCS limit value corresponding to the next cycle determined in the current cycle to limit the MCS value corresponding to the wireless channel in the next cycle, so that the next cycle
  • the MCS value applied by the base station and user equipment during data transmission is less than the MCS limit value corresponding to the next cycle, which is conducive to obtaining better modulation and coding effects, thereby better adapting to the real environment of the wireless channel, and also conducive to improving RB Utilization rate, so that the RB utilization rate can be within the normal range.
  • the periodic method in this embodiment can automatically and regularly limit the MCS value corresponding to the wireless channel.
  • the RB utilization rate in the wireless channel in each TTI in the current period is conducive to reasonably determine the RB utilization rate in the wireless channel in the current period and the amount of data passed in the current period.
  • the amount of data scheduled by the wireless channel makes the determined MCS limit value more reasonable and accurate, which is conducive to better exerting the limiting effect of the MCS limit value.
  • the third embodiment of the present application relates to a method for determining a modulation and coding method MCS.
  • the following describes the implementation details of the method for determining a modulation and coding method MCS in this embodiment.
  • the following content is provided only for ease of understanding and implementation details, not implementation A must for this program.
  • the preset restriction conditions in this embodiment also include: a second restriction condition, the second restriction condition is: the RB utilization rate is less than the first utilization rate, or the RB utilization rate is greater than the preset second utilization rate, and the second utilization rate is greater than The first utilization rate.
  • the second utilization rate can be understood as the higher threshold value of the utilization rate, and the first utilization rate can be understood as the lower threshold value of the utilization rate; both the first utilization rate and the second utilization rate can be set according to actual needs.
  • the embodiment does not specifically limit this. Considering that, in specific implementation, the amount of data transmitted by the air interface in a given interval (one cycle) is determined by the application. For the air interface, it may be large or small, and there is no regularity.
  • the RB utilization rate in the wireless channel may be A situation occurs that is less than the first utilization rate, greater than the first utilization rate and less than the second utilization rate, or greater than the second utilization rate.
  • the base station can periodically obtain the resource block RB utilization rate in the wireless channel. After the RB utilization rate in the wireless channel in the current cycle meets the first restriction condition, when the RB utilization rate in the wireless channel in the cycle after the current cycle When the RB utilization rate meets the second restriction condition, the MCS restriction value is determined.
  • the MCS restriction value is determined when the RB utilization rate in the wireless channel in the current cycle satisfies the first restriction condition, that is, when the RB utilization rate is less than the preset first utilization rate.
  • the method further includes: after the preset exit restriction condition is satisfied, when the wireless channel The MCS limit value is determined when the RB utilization rate in the RB satisfies the first limit condition; among them, the exit limit condition is: the MCS limit value is detected to be greater than the MCS value in N cycles after the current cycle, and N is a natural number greater than 1, Each of the N cycles has its own MCS limit value and MCS value.
  • the base station determines that the RB utilization in the wireless channel meets the preset exit restriction conditions, it can be considered that the base station exits the restricted mode, that is, enters the unrestricted mode.
  • the base station determines the RB utilization in the wireless channel
  • the MCS restriction value is determined.
  • Step 301 Obtain 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 to avoid repetition, this embodiment will not be repeated here.
  • Step 302 When the RB utilization rate in the wireless channel in the current period is less than the preset first utilization rate, enter the preset restriction mode, and determine the MCS restriction value in the restriction mode.
  • the base station determines that the RB utilization rate in the wireless channel in the current cycle is less than the preset first utilization rate, it determines to enter the restriction mode from the current cycle, and determines the MCS restriction value in the restriction mode.
  • the MCS limit value is determined, that is, when the RB utilization rate in the wireless channel is less than the first utilization rate or when the RB utilization rate in the wireless channel If the rate is greater than the preset second utilization rate, the MCS limit value is determined; wherein, the second utilization rate is greater than the first utilization rate.
  • the base station will calculate the RB utilization rate in the wireless channel in the period after the end of each period.
  • the base station can determine the MCS limit value, which is used to limit the MCS value corresponding to the next period of the period.
  • 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 wireless channel in the period.
  • the base station can determine the MCS limit value corresponding to the next period of the period based on the amount of data scheduled through the wireless channel in the period.
  • the specific method for the base station to obtain the amount of data scheduled through the wireless channel in a period may refer to the method mentioned in step 202 of the second embodiment. To avoid repetition, this embodiment does not specifically limit this.
  • the base station when the RB utilization rate in the wireless channel in the period is less than the first utilization rate, the base station obtains a smaller amount of scheduled data in the period, and therefore the MCS limit value determined based on the smaller amount of data is higher. small.
  • the base station obtains a larger amount of scheduled data in the period, and therefore the MCS limit value determined based on the larger amount of data is larger.
  • the amount of data scheduled in the period and the first utilization rate may also be combined.
  • FIG. 4 includes the following steps.
  • Step 401 Calculate the RB utilization rate in the wireless channel in the period.
  • the base station may calculate the RB utilization rate in the wireless channel in the period after the period ends.
  • Step 402 Determine whether the RB utilization rate is less than the first utilization rate; if yes, perform step 404; otherwise, perform step 403.
  • step 404 is executed.
  • Step 403 Determine whether the RB utilization rate is greater than the second utilization rate; if it is, perform Step 404, otherwise the processing flow for this period ends.
  • the second utilization rate can be understood as a higher threshold value of the utilization rate
  • the first utilization rate can be understood as a lower threshold value of the utilization rate. If the RB utilization rate is greater than the second utilization rate, it can be considered that the RB utilization rate is too high, and step 404 is executed. If the RB utilization rate is less than the second utilization rate, that is, the RB utilization rate is greater than the first utilization rate and less than the second utilization rate, it can be considered that the RB utilization rate is normal, and step 404 will not be performed, that is, no restriction processing will be performed.
  • the first utilization rate and the second utilization rate may be stored in the base station in advance, for example, stored in the scheduler of the base station.
  • the size of the first utilization rate and the second utilization rate can be set by those skilled in the art according to actual needs, and the sizes of the first utilization rate and the second utilization rate stored in the base station can also be adjusted according to actual needs.
  • this embodiment The example does not make specific restrictions on this.
  • Step 404 Determine the MCS limit value.
  • this step is performed.
  • the base station will control the MCS value corresponding to the wireless channel in the next cycle to be smaller than the MCS limit value in the next cycle of the cycle. 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 can be reduced so that the reduced MCS value is less than the MCS limit value determined in step 404.
  • Step 303 Determine the MCS value corresponding to the wireless channel in the next period.
  • Step 304 When the MCS value is greater than or equal to the MCS limit value, reduce the determined MCS value.
  • step 303 to step 304 are substantially the same as step 203 to step 204 in the second embodiment, and in order to avoid repetition, it will not be repeated here.
  • Step 305 When it is detected that the MCS limit value is greater than the MCS value in N cycles, exit the limit mode.
  • N cycles correspond to their respective MCS limit values and MCS values, and N is a natural number greater than 1. That is, after entering the restricted mode, if it is detected that the MCS limit value is greater than the MCS value in multiple cycles, the restricted mode will be exited. It is understandable that if it is detected that the MCS limit value is greater than the MCS value in multiple cycles, it can be considered that the MCS limit value does not play a limiting role, and the limit mode is exited. In a specific implementation, the foregoing N cycles may be N consecutive cycles.
  • the information of multiple cycles can be referred to.
  • the preset exit restriction condition that is, the detection is performed in N cycles.
  • the MCS limit value is greater than the MCS value, it can be reasonably deduced that the MCS limit value does not have a limit effect, so that the limit mode can be exited 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 starts to operate
  • the MCS restriction value is determined.
  • the utilization range includes two thresholds, the lower threshold is the first utilization rate, and the higher threshold is the second utilization rate, which is conducive to more comprehensive consideration of the various situations that may occur in the RB utilization rate in the wireless channel.
  • the higher threshold allows the step of determining the MCS limit value to be performed when the RB utilization rate is greater than the second utilization rate, which is beneficial to avoid the frequent access restriction mode.
  • the fourth embodiment of the present application relates to a device for determining a modulation and coding scheme MCS. As shown in FIG. 5, it includes: at least one processor 501; and a memory 502 communicatively connected with the at least one processor 501; There are instructions that can be executed by at least one processor 501, and the instructions are executed by at least one processor 501, so that at least one processor 501 can execute the foregoing method of determining the modulation and coding mode MCS.
  • the memory 502 and the processor 501 are connected in a bus manner.
  • the bus may include any number of interconnected buses and bridges, and the bus connects one or more various circuits of the processor 501 and the memory 502 together.
  • the bus can also connect various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides an interface between the bus and the transceiver.
  • the transceiver may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on the transmission medium.
  • the data processed by the processor 501 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor 501.
  • the processor 501 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 502 may be used to store data used by the processor 501 when performing operations.
  • the fifth embodiment of the present application relates to a computer-readable storage medium, which stores a computer program.
  • the computer program is executed by the processor, the above method embodiment is realized.
  • the program is stored in a storage medium and includes several instructions to enable a device ( It may be a single-chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请公开一种确定调制编码方式MCS的方法、设备和存储介质。上述方法包括：获取无线信道中的资源块RB利用率；当所述RB利用率满足预设的限制条件，确定MCS限制值；其中，所述限制条件包括第一限制条件，所述第一限制条件为：所述RB利用率小于预设的第一利用率；确定所述无线信道对应的MCS值；当所述MCS值大于或等于所述MCS限制值，降低确定的所述MCS值。

Description

确定调制编码方式MCS的方法、设备和存储介质 技术领域
本申请涉及通讯领域，尤其涉及一种确定调制编码方式MCS的方法、设备和存储介质。
背景技术
无线信道具有很强的时变性，短时间内衰落可以达到十几甚至几十分贝(dB)，自适应调制和编码(Adaptive Modulation and Coding，简称：AMC)技术就是针对信道时变性，动态地选择适当的调制和编码方式(Modulation and Coding Scheme，简称：MCS)，可以使通信系统的传输效率得到极大地提高。其基本原理就是在接收端对数据传输的信道特性进行估计，并反馈给发送端，发送端根据接收端反馈的信道特性来选择相应的MCS进行数据传输，提高系统整体的吞吐量和传输效率。但目前的AMC方案，因为设计的方法和考虑的因素不同，而表现出了千差万别的差异，导致确定的MCS可能不准确，编码效果不好，较难适应无线信道的真实环境。
发明内容
为实现上述目的，本申请实施例提供了一种确定调制编码方式MCS的方法，所述方法包括：获取无线信道中的资源块RB利用率；当所述RB利用率满足预设的限制条件，确定MCS限制值；其中，所述限制条件包括第一限制条件，所述第一限制条件为：所述RB利用率小于预设的第一利用率；；确定所述无线信道对应的MCS值；当所述MCS值大于或等于所述MCS限制值，降低确定的所述MCS值。
本申请实施例还提出了一种确定调制编码方式MCS的设备，所述设备包 括存储器、处理器、存储在所述存储器上并可在所述处理器上运行的程序以及用于实现所述处理器和所述存储器之间的连接通信的数据总线，所述程序被所述处理器执行时实现前述方法的步骤。
本申请提供了一种存储介质，用于计算机可读存储，所述存储介质存储有一个或者多个程序，所述一个或者多个程序可被一个或者多个处理器执行，以实现前述方法的步骤。
附图说明
图1是本申请第一实施例提供的确定调制编码方式MCS的方法的流程图；
图2是本申请第二实施例提供的确定调制编码方式MCS的方法的流程图；
图3是本申请第三实施例提供的确定调制编码方式MCS的方法的流程图；
图4是本申请第三实施例提供的限制模式下每个周期对应的处理流程图；
图5是本申请第四实施例提供的确定调制编码方式MCS的设备的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请的各实施例进行详细的阐述。然而，本领域的普通技术人员可以理解，在本申请各实施例中，为了使读者更好地理解本申请而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施例的种种变化和修改，也可以实现本申请所要求保护的技术方案。以下各个实施例的划分是为了描述方便，不应对本申请的具体实现方式构成任何限定，各个实施例在不矛盾的前提下可以相互结合相互引用。
本申请实施例的主要目的在于提出一种确定调制编码方式MCS的方法、设备和存储介质，旨在适应无线信道的真实环境，提高调制编码的效果。
本申请实施例提出的确定调制编码方式MCS的方法、设备和存储介质， 其通过获取无线信道中的RB利用率以对RB利用率进行监测，在RB利用率满足预设的限制条件，确定MCS限制值。限制条件包括第一限制条件，第一限制条件为：RB利用率小于预设的第一利用率，即RB利用率较低时，确定MCS限制值，使得在轻载时，可以利用该MCS限制值对无线信道对应的MCS值进行限制，当MCS值大于或等于MCS限制值，降低确定的MCS值，即在数据传输过程中所实际应用的MCS值小于MCS限制值，有利于获取更好的调制编码效果，从而更好的适应无线信道的真实环境。而且，降低确定的MCS值，使得可以降低每次调度的数据量，从而增加调度的次数，可以增加AGC等算法的输入数据数目，也起到平滑调度和报文传输流量的作用。
本申请的第一实施例涉及一种确定调制编码方式MCS的方法，包括：获取无线信道中的资源块(Resource Block,简称：RB)利用率；当RB利用率小于预设的第一利用率，确定MCS限制值；确定无线信道对应的MCS值；当MCS值大于或等于MCS限制值，降低确定的MCS值。下面对本实施例的确定调制编码方式MCS的方法的实现细节进行说明，以下内容仅为方便理解而提供的实现细节，并非实施本方案的必须。
本实施例中的确定调制编码方式MCS的方法，应用于基站，基站中的介质访问控制层(Media Access Control，简称：MAC层)中设置有调度器，该调度器可以执行本实施例中的确定调制编码方式MCS的方法。例如，对于上行调度的场景，即用户设备(User Equipment，简称：UE)需要向基站发送数据，基站通过执行本实施例中的确定调制编码方式MCS的方法，确定MCS值，即确定调制方式、码率、效率。基站将最终确定好的MCS值发送给用户设备，用户设备按照接收到的MCS值向基站发送数据。对于下行调度的场景，即基站需要发送数据给用户设备，基站通过执行本实施例中的确定调制编码方式MCS的方法，确定MCS值，按照确定的MCS值向用户设备发送数据。以上仅为举例说明的应用场景，然并不以此为限。
本实施例的具体流程如图1所示，包括以下步骤。
步骤101：获取无线信道中的资源块RB利用率。
其中，资源块是频域资源分配的单位，一个资源块的带宽为180千赫兹(kHz)，由12个带宽为15kHz的子载波组成，在时域上为一个时隙。RB用于承载业务数据，子载波是用于承载业务数据的单元。在信号传输的过程中，并不是将信号直接进行传输，而是将信号与一个固定频率的波进行相互作用，这个过程称为加载，这样的一个固定频率的波称为载波频率。
在一个例子中，用户设备需要传输业务数据时，基站可以为用户设备分配相应的RB用于传输业务数据，即无线信道中可用的RB个数是一定的，在有业务数据进行传输时，基站可获取预设时长内无线信道中实际使用的RB个数，进而根据无线信道中实际使用的RB个数与无线信道中可用的RB个数的比值获取预设时长内无线信道中的RB利用率。其中，预设时长可以根据实际需要进行设置，比如可以为常量，也可以为变量或者由几个因素确定的一个函数的值，然而本实施例对此不做具体限定。在具体实现中，基站可以在接收到获取指令后，获取无线信道中的RB利用率，然并不以此为限。
步骤102：当RB利用率满足预设的限制条件，确定MCS限制值。
其中，限制条件包括第一限制条件，第一限制条件为：RB利用率小于预设的第一利用率。
第一利用率可以预存在基站的调度器中，比如在调度器启动时可以配置RB利用率门限为第一利用率。具体的，第一利用率的大小可以根据具体的应用情况设置，比如，基站可以根据自己软硬件的处理能力和经验数据，固定或动态设置该值。
在具体实现中，基站可以判断RB利用率是否小于预设的第一利用率，如果RB利用率小于预设的第一利用率，认为当前负载过轻，则可以确定MCS限制值。该MCS限制值可以用来限制接下来一段时间内基站与用户设备之间进行数据传输所应用的MCS值，保证接下来一段时间内基站与用户设备之间进行数据传输所应用的MCS值小于MCS限制值。如果RB利用率大于预设的第一利 用率则可以接着执行步骤101，获取无线信道中的RB利用率。
在一个例子中，可以通过以下方式确定MCS限制值：获取通过无线信道调度的数据量，根据调度的数据量，确定MCS限制值；其中，调度的数据量越多，确定的MCS限制值可以越大。在具体实现中，基站可以获取预设时长内通过无线信道调度的数据量，该预设时长与步骤101中提到的预设时长相同。由于，不同的MCS值对应的能够调度的字节数是一定的，即每一个不同的MCS值对应的能够调度的数据量是一定的。因此，根据获取的调度的数据量，可以选择一个能将这些数据量调出去的最小MCS值作为确定的MCS限制值。
在另一个例子中，还可以通过以下方式确定MCS限制值：获取通过无线信道调度的数据量，根据调度的数据量和预设的第一利用率，确定MCS限制值。假设，预设的第一利用率为50％，获取的调度的数据量为50个字节，则确定的MCS限制值可以为能够调度50/50％＝100个字节所对应的MCS值中最小的一个MCS值。本示例中，通过结合调度的数据量和预设的第一利用率，确定MCS限制值，使得可以更加准确合理的确定MCS限制值，提高了利用该MCS限制值对无线信道对应的MCS值进行限制后，无线信道中的RB利用率大于第一利用率的可能性，即有利于使得限制之后RB利用率可以处于正常范围，从而对无线信道中的RB进行合理的利用。
步骤103：确定无线信道对应的MCS值。
具体的说，基站可以根据AMC技术针对信道的时变性，动态地选择适当的调制和编码方式MCS，作为无线信道对应的MCS值。在具体实现中，基站可以接收用户设备反馈的无线信道的信道特性，信道特性也可以称为信道参数，基站根据接收的信道参数确定无线信道的质量，无线信道的质量可以用信道质量指示符(Channel Quality Indicator，简称：CQI)表示。不同等级的CQI对应不同的调制方式、码率、效率，即MCS，不同等级的CQI对应的MCS可以参考表1。因此，基站在确定无线信道的CQI的等级后，可以通过查找表1确定无线信道对应的MCS值。其中，CQI等级越高，表示一个无线信道的质量越高， 因此，可以用CQI等级来表示无线信道的信噪比。信噪比大，证明无线信道的质量情况比较好，故可以选择的CQI等级也就比较高，无线信道质量好的情况下，可以选择更高阶的调制编码方式，即更高的CQI等级对应的调制编码方式，从而达到更高的码率和效率。
表1
Figure PCTCN2021079489-appb-000001
步骤104：当MCS值大于或等于MCS限制值，降低确定的MCS值。
具体的说，基站可以判断确定的MCS值是否大于或等于MCS限制值，如果MCS值大于或等于MCS限制值，可以降低确定的MCS值；其中，降低后的MCS值可以小于MCS限制值。基站可以将降低后的MCS值发送给用户设备，使得用户设备可以根据降低后的MCS值向基站发送数据。如果MCS值小于MCS限制值，说明MCS限制值不起限制作用，无需降低确定的MCS值，基站可以直接将步骤103中确定的MCS值，发送给用户设备，使得用户设备可以根据接收的MCS值向基站发送数据。
在具体实现中，假设步骤103中确定的MCS值为表1中CQI等级为8时对应的MCS值，则降低确定的MCS值，可以理解为：降低CQI等级，降低后的CQI等级对应的MCS值可以作为降低后的MCS值。
需要说明的是，本实施例中的上述各示例均为为方便理解进行的举例说 明，并不对本申请的技术方案构成限定。
可以理解的是，当RB利用率小于预设的第一利用率，可以认为当前负载过轻，此时无线信道的处理能力不需要很高，即基站与用户设备之间实际在进行数据传输时所应用的MCS值不需要很高。因此，本实施例通过获取无线信道中的RB利用率以对RB利用率进行监测，在RB利用率小于预设的第一利用率，即RB利用率较低时，确定MCS限制值，使得在轻载时，可以利用该MCS限制值对无线信道对应的MCS值进行限制，当MCS值大于或等于MCS限制值，降低确定的MCS值，即在数据传输过程中所实际应用的MCS值小于MCS限制值，有利于获取更好的调制编码效果，从而更好的适应无线信道的真实环境，还有利于提高RB利用率，使得RB利用率可以处于正常的范围之内。
另外，在一些情形中，接收方收到的信号功率会有所变化，为了使接收方可以稳定的解调出数据，需要使接收方的信号功率稳定。通过自动增益控制(Automatic Gain Control，简称：AGC)能够自动调整接收方接收到的信号的功率，使得接收方的信号功率稳定。然而，一些情形中的AGC作为一种动态的增益控制方案，在实现时经常会因为输入数据不足，而导致不能做出准确的反应。本实施例中，在轻载时即RB利用率小于预设的第一利用率，当MCS值大于或等于MCS限制值，降低确定的MCS值，使得可以降低每次调度的数据量，从而增加调度的次数，对应的可以增加接收方接收数据的次数，使得AGC可以利用多次接收的数据进行多次学习和优化，从而有利于针对接收的数据做出准确的反应。即，本申请实施例可以在轻载时，为AGC提供更多次的输入数据，还有利于提高AGC的控制性能。而且，通过降低确定的MCS值，还有利于提高解调能力，也起到平滑调度和报文传输流量的作用。
本申请的第二实施例涉及一种确定调制编码方式MCS的方法，下面对本实施例的确定调制编码方式MCS的方法的实现细节进行说明，以下内容仅为方便理解而提供的实现细节，并非实施本方案的必须。
本实施例中确定调制编码方式MCS的方法的流程图可以参考图2，包括 以下步骤。
步骤201：获取当前周期内无线信道中的RB利用率。
也就是说，基站可以周期性的获取无线信道中的RB利用率，比如基站可以每隔预设时长自动获取该预设时长内无线信道中的RB利用率。周期性的获取方式使得基站可以主动规律性的无线信道中的RB利用率进行监测。
在一个例子中，周期的时长可以包括若干个传输时间间隔(Transmission Time Interval，简称：TTI)，TTI是指在无线链路中的一个独立解码传输的长度；其中，周期的时长也可以理解为上述的预设时长。基站可以通过以下方式获取当前周期内无线信道中的RB利用率：首先，获取当前周期中各个TTI内无线信道中的RB利用率；接着，根据各个TTI内无线信道中的RB利用率和各个TTI内无线信道中的RB利用率分别对应的权重，获取当前周期内无线信道中的RB利用率。结合各个TTI内无线信道中的RB利用率的权重，有利于更加合理的得到当前周期内无线信道中的RB利用率。
其中，各个TTI内无线信道中的RB利用率分别对应的权重可以根据实际需要进行设置。在一个例子中，各个TTI内无线信道中的RB利用率分别对应的权重均相同且大于0，则根据各个TTI内无线信道中的RB利用率和各个TTI内无线信道中的RB利用率分别对应的权重，获取当前周期内无线信道中的RB利用率，可以理解为：将各个TTI内无线信道中的RB利用率的平均值作为当前周期内无线信道中的RB利用率。通过对各个TTI内无线信道中的RB利用率求平均，将平均值作为当前周期内无线信道中的RB利用率，有利于更加准确、全面的对当前周期内无线信道中的RB利用率进行衡量。
在另一个例子中，各个TTI内无线信道中的RB利用率分别对应的权重也可以不同，比如，如果要将当前周期内某一个TTI内无线信道中的RB利用率作为当前周期内无线信道中的RB利用率，则可以将该TTI内无线信道中的RB利用率对应的权重设置为1，将其他TTI内无线信道中的RB利用率对应的权重设置为0，然而本实施例对此不做具体限定。
步骤202：当RB利用率满足预设的限制条件，确定MCS限制值。
其中，限制条件包括第一限制条件，第一限制条件为：RB利用率小于预设的第一利用率。
在一个例子中，基站可以先获取当前周期中各个TTI内通过无线信道调度的数据量；接着，根据各个TTI内通过无线信道调度的数据量和各个TTI内通过无线信道调度的数据量分别对应的权重，确定MCS限制值。在具体实现中，基站可以先根据各个TTI内通过无线信道调度的数据量和各个TTI内通过无线信道调度的数据量分别对应的权重，确定当前周期内通过无线信道调度的数据量，根据当前周期内通过无线信道调度的数据量，确定MCS限制值。确定的该MCS限制值可以为下一周期对应的MCS限制值，用于限制下一周期基站与用户设备之间进行数据传输所应用的MCS值。
其中，各个TTI内调度的数据量分别对应的权重可以根据实际需要进行设置。
在一个例子中，各个TTI内通过无线信道调度的数据量分别对应的权重可以均相同且大于0，则根据各个TTI内通过无线信道调度的数据量和各个TTI内通过无线信道调度的数据量分别对应的权重，获取当前周期内通过无线信道调度的数据量，可以理解为：将各个TTI内通过无线信道调度的数据量的平均值，作为基站在当前周期内通过无线信道调度的数据量。通过对各个TTI内通过无线信道调度的数据量求平均，将平均值作为当前周期内通过无线信道调度的数据量，有利于更加准确、全面的对当前周期内通过无线信道调度的数据量进行衡量。
在另一个例子中，各个TTI内通过无线信道调度的数据量分别对应的权重也可以不同，比如，如果要将某一个TTI内通过无线信道调度的数据量作为当前周期内调度的数据量，则可以将该TTI内通过无线信道调度的数据量对应的权重设置为1，将其他TTI内通过无线信道调度的数据量对应的权重设置为0，然而本实施例对此不做具体限定。
步骤203：确定下一周期内无线信道对应的MCS值。
具体的说，基站可以根据用户设备在下一周期反馈的无线信道的信道特性，确定CQI等级，根据该CQI等级查找上述表1，从而确定下一周期内无线信道对应的MCS值。
在一个例子中，周期的时长可以包括若干个TTI,下一周期内无线信道对应的MCS值，可以包括：下一周期的每个TTI内无线信道对应的MCS值，可以理解为基站针对每个TTI，均会参考上述表1分配一个MCS值。
步骤204：当MCS值大于或等于MCS限制值，降低确定的MCS值。
在一个例子中，当下一周期内无线信道对应的MCS值大于或等于下一周期对应的MCS限制值，则可以降低下一周期内无线信道对应的MCS值。也就是说，基站在确定当前周期的RB利用率较低时，利用确定的下一周期对应的MCS限制值去限制下一周期内无线信道对应的MCS值，使得下一周期基站与用户设备在进行数据传输时实际所应用的MCS值小于下一周期对应的MCS限制值。
在一个例子中，如果基站针对下一周期的每个TTI，均分配一个MCS值，则基站可以利用下一周期对应的MCS限制值限制下一周期的每个TTI被分配的MCS值，使得下一周期的每个TTI内基站与用户设备在进行数据传输时实际所应用的MCS值小于下一周期对应的MCS限制值。
需要说明的是，本实施例中的上述各示例均为为方便理解进行的举例说明，并不对本申请的技术方案构成限定。
在本实施例中，基站在确定当前周期的RB利用率较低时，利用在当前周期确定的下一周期对应的MCS限制值去限制下一周期内无线信道对应的MCS值，使得下一周期基站与用户设备在进行数据传输时所应用的MCS值小于下一周期对应的MCS限制值，有利于获取更好的调制编码效果，从而更好的适应无线信道的真实环境，还有利于提高RB利用率，使得RB利用率可以处于正常的范围之内。而且，本实施例中周期性的方式可以自动规律性的对无线信道对应 的MCS值进行限制。同时，结合当前周期内各个TTI内无线信道中的RB利用率，以及各个TTI内通过无线信道调度的数据量，有利于合理的确定当前周期内无线信道中的RB利用率，以及当前周期内通过无线信道调度的数据量，从而使得确定的MCS限制值更加合理和准确，有利于更好的发挥该MCS限制值的限制作用。
本申请的第三实施例涉及一种确定调制编码方式MCS的方法，下面对本实施例的确定调制编码方式MCS的方法的实现细节进行说明，以下内容仅为方便理解而提供的实现细节，并非实施本方案的必须。
本实施例中预设的限制条件还包括：第二限制条件，第二限制条件为：RB利用率小于第一利用率，或者RB利用率大于预设的第二利用率，第二利用率大于第一利用率。第二利用率可以理解为利用率的较高门限值，第一利用率可以理解为利用率的较低门限值；第一利用率和第二利用率均可以根据实际需要进行设置，本实施例对此不做具体限定。考虑到，具体实现中，给定间隔(一个周期)内空口传输的数据量的大小是由应用确定，对于空口来说可能大，可能小，没有规律性，因此无线信道中的RB利用率可能出现小于第一利用率、大于第一利用率且小于第二利用率，或大于第二利用率的情况。通过设置第二限制条件，有利于更加全面的考虑到无线信道中的RB利用率可能出现的上述3种情况，从而有利于更全面的根据无线信道中的RB利用率对MCS值进行限制。
在具体实现中，基站可以周期性的获取无线信道中的资源块RB利用率，在当前周期内无线信道中的RB利用率满足第一限制条件后，当当前周期之后的周期内无线信道中的RB利用率满足第二限制条件时，确定MCS限制值。为便于理解，当当前周期内无线信道中的RB利用率满足第一限制条件，即RB利用率小于预设的第一利用率时，可以认为基站从当前周期开始进入限制模式，在限制模式下，当无线信道中的RB利用率满足第二限制条件时，确定MCS限制值。
在一个例子中，在当所述当前周期之后的周期内无线信道中的RB利用率 满足第二限制条件，确定MCS限制值之后，还包括：在满足预设的退出限制条件后，当无线信道中的RB利用率满足第一限制条件时，确定MCS限制值；其中，退出限制条件为：在当前周期后的N个周期内均检测到MCS限制值大于MCS值，N为大于1的自然数，N个周期均对应有各自的MCS限制值和MCS值。为便于理解，当基站确定无线信道中的RB利用率满足预设的退出限制条件，可以认为基站退出限制模式，即进入非限制模式，在非限制模式下，基站在确定无线信道中的RB利用率满足第一限制条件时，确定MCS限制值。
在一个例子中，本实施例中确定调制编码方式MCS的方法的流程图可以参考图3，包括以下步骤。步骤301：获取当前周期内无线信道中的RB利用率。
其中，步骤301与第二实施例中步骤201大致相同，为避免重复，本实施例在此不再赘述。
步骤302：当当前周期内无线信道中的RB利用率小于预设的第一利用率，进入预设的限制模式，在限制模式下，确定MCS限制值。
也就是说，如果基站确定当前周期内无线信道中的RB利用率小于预设的第一利用率，则确定从当前周期开始进入限制模式，在限制模式下，确定MCS限制值。
在具体实现中，在限制模式下，当RB利用率满足预设的第二限制条件，确定MCS限制值，即当无线信道中的RB利用率小于第一利用率或者当无线信道中的RB利用率大于预设的第二利用率，确定MCS限制值；其中，第二利用率大于第一利用率。其中，基站在每个周期结束后，均会计算该周期内无线信道中的RB利用率，从进入限制模式开始到退出限制模式之前，当计算的一个周期的RB利用率小于第一利用率或者大于第二利用率，基站均可以确定MCS限制值，用于对该周期的下一个周期对应的MCS值进行限制。
具体的，当该周期内无线信道中的RB利用率小于第一利用率时，基站可以基于该周期内通过无线信道调度的数据量，确定该周期的下一周期对应的MCS限制值。当该周期内无线信道中的RB利用率大于第二利用率时，基站可 以基于该周期内通过无线信道调度的数据量，确定该周期的下一周期对应的MCS限制值。其中，基站获取一个周期内通过无线信道调度的数据量的具体方式，可以参考第二实施例的步骤202中提到的方式，为避免重复，本实施例对此不做具体限定。
可以理解的是，当该周期内无线信道中的RB利用率小于第一利用率时，基站获取的该周期内调度的数据量较少，因此基于该较少的数据量确定的MCS限制值较小。当该周期内无线信道中的RB利用率大于第二利用率时，基站获取的该周期内调度的数据量较多，因此基于该较多的数据量确定的MCS限制值较大。在具体实现中，在确定MCS限制值时，还可以结合该周期内调度的数据量和第一利用率。
为便于理解，在限制模式下，基站在每个周期的处理流程可以参考图4，包括以下步骤。
步骤401：计算该周期内无线信道中的RB利用率。
在具体实现中，基站可以在该周期结束后，计算该周期内无线信道中的RB利用率。
步骤402：判断RB利用率是否小于第一利用率；如果是，则执行步骤404，否则执行步骤403。
其中，如果RB利用率小于第一利用率，可以认为RB利用率过低，则执行步骤404。
步骤403：判断RB利用率是否大于第二利用率；如果是，则执行步骤404，否则对该周期的处理流程结束。
其中，第二利用率可以理解为利用率的较高门限值，第一利用率可以理解为利用率的较低门限值。如果RB利用率大于第二利用率，可以认为RB利用率过高，则执行步骤404。如果RB利用率小于第二利用率，即RB利用率大于第一利用率且小于第二利用率，可以认为RB利用率正常，不会执行步骤404，即不会做限制处理。
在具体实现中，第一利用率和第二利用率可以预先存储在基站中，比如存储在基站的调度器中。第一利用率和第二利用率的大小可以由本领域技术人员根据实际需要进行设置，存储在基站中的第一利用率和第二利用率的大小还可以根据实际需要进行调整，然而，本实施例对此不做具体限定。
步骤404：确定MCS限制值。
也就是说，如果RB利用率小于第一利用率，或者RB利用率大于第二利用率，均会执行该步骤。
在具体实现中，基站在该周期的下一周期会控制下一周期内无线信道对应的MCS值小于MCS限制值。比如，如果该周期的下一周期内无线信道对应的MCS值大于MCS限制值，则可以降低该MCS值，使得降低后的MCS值小于步骤404中确定的MCS限制值。
步骤303：确定下一周期内无线信道对应的MCS值。
步骤304：当MCS值大于或等于MCS限制值，降低确定的MCS值。
其中，步骤303至步骤304与第二实施例中的步骤203至步骤204大致相同，为避免重复，此处不再赘述。
步骤305：当在N个周期内均检测到MCS限制值大于MCS值，退出限制模式。
其中，N个周期均对应有各自的MCS限制值和MCS值，N为大于1的自然数。也就是说，在进入限制模式后，如果在多个周期内均检测到MCS限制值大于MCS值，则退出限制模式。可以理解的是，如果在多个周期内均检测到MCS限制值大于MCS值，可以认为MCS限制值起不到限制作用，则退出限制模式。在具体实现中，上述N个周期可以为N个连续的周期。
需要说明的是，本实施例中的上述各示例均为为方便理解进行的举例说明，并不对本申请的技术方案构成限定。
在本实施例中，通过对N个周期各自对应的MCS限制值和MCS值的大小进行比较，可以参考多个周期的信息，当满足预设的退出限制条件，即在N 个周期内均检测到MCS限制值大于MCS值，可以合理的推出MCS限制值起不到限制作用，从而可以及时退出限制模式，即将预设的限制条件从第二限制条件切换为第一限制条件，从而基站开始在无线信道中的RB利用率满足第一限制条件时，确定MCS限制值。而且利用率范围包括两个门限，较低门限即第一利用率，较高门限即第二利用率，有利于更加全面的考虑到无线信道中的RB利用率可能出现的多种情况，通过设置较高门限，使得针对于RB利用率大于第二利用率的情况，也会执行确定MCS限制值的步骤，有利于避免频繁进出限制模式。
此外，本领域技术人员可以理解，上面各种方法的步骤划分，只是为了描述清楚，实现时可以合并为一个步骤或者对某些步骤进行拆分，分解为多个步骤，只要包括相同的逻辑关系，都在本专利的保护范围内；对算法中或者流程中添加无关紧要的修改或者引入无关紧要的设计，但不改变其算法和流程的核心设计都在该专利的保护范围内。
本申请第四实施例涉及一种确定调制编码方式MCS的设备，如图5所示，包括：至少一个处理器501；以及，与至少一个处理器501通信连接的存储器502；其中，存储器502存储有可被至少一个处理器501执行的指令，指令被至少一个处理器501执行，以使至少一个处理器501能够执行上述的确定调制编码方式MCS的方法。
其中，存储器502和处理器501采用总线方式连接，总线可以包括任意数量的互联的总线和桥，总线将一个或多个处理器501和存储器502的各种电路连接在一起。总线还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路连接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口在总线和收发机之间提供接口。收发机可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经处理器501处理的数据通过天线在无线介质上进行传输，进一步，天线还接收数据并将数据传送给处理器501。
处理器501负责管理总线和通常的处理，还可以提供各种功能，包括定 时，外围接口，电压调节、电源管理以及其他控制功能。而存储器502可以被用于存储处理器501在执行操作时所使用的数据。
本申请第五实施例涉及一种计算机可读存储介质，存储有计算机程序。计算机程序被处理器执行时实现上述方法实施例。
即，本领域技术人员可以理解，实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本领域的普通技术人员可以理解，上述各实施例是实现本申请的具体实施例，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本申请的精神和范围。

Claims (10)

  1. 一种确定调制编码方式MCS的方法，包括：
    获取无线信道中的资源块RB利用率；
    当所述RB利用率满足预设的限制条件，确定MCS限制值；其中，所述预设的限制条件包括第一限制条件，所述第一限制条件为：所述RB利用率小于预设的第一利用率；
    确定所述无线信道对应的MCS值；
    当所述MCS值大于或等于所述MCS限制值，降低确定的所述MCS值。
  2. 根据权利要求1所述的确定调制编码方式MCS的方法，其中，所述确定MCS限制值，包括：
    获取通过所述无线信道调度的数据量；
    根据所述调度的数据量，确定所述MCS限制值。
  3. 根据权利要求2所述的确定调制编码方式MCS的方法，其中，所述根据所述调度的数据量，确定所述MCS限制值，包括：
    根据所述调度的数据量和所述第一利用率，确定所述MCS限制值。
  4. 根据权利要求1所述的确定调制编码方式MCS的方法，其中，所述获取无线信道中的资源块RB利用率，包括：
    获取当前周期内所述无线信道中的RB利用率；
    所述确定所述无线信道对应的MCS值，包括：
    确定下一周期内所述无线信道对应的MCS值。
  5. 根据权利要求4所述的确定调制编码方式MCS的方法，其中，所述周期的时长包括若干个传输时间间隔TTI，所述获取当前周期内所述无线信道中的RB利用率，包括：
    获取所述当前周期中各个所述TTI内所述无线信道中的RB利用率；
    根据所述各个所述TTI内所述无线信道中的RB利用率和所述各个所述TTI 内所述无线信道中的RB利用率分别对应的权重，获取所述当前周期内所述无线信道中的RB利用率。
  6. 根据权利要求4所述的确定调制编码方式MCS的方法，其中，所述周期的时长包括若干个传输时间间隔TTI，所述确定MCS限制值，包括：
    获取所述当前周期中各个所述TTI内通过所述无线信道调度的数据量；
    根据各个所述TTI内通过所述无线信道调度的数据量和所述各个所述TTI内通过所述无线信道调度的数据量分别对应的权重，确定所述MCS限制值。
  7. 根据权利要求1所述的确定调制编码方式MCS的方法，其中，所述预设的限制条件还包括：第二限制条件，所述第二限制条件为：所述RB利用率小于所述第一利用率，或者所述RB利用率大于预设的第二利用率，所述第二利用率大于所述第一利用率；
    所述获取无线信道中的资源块RB利用率，包括：
    周期性获取所述无线信道中的RB利用率；
    所述当所述RB利用率满足预设的限制条件，确定MCS限制值，包括：
    在当前周期内所述无线信道中的RB利用率满足所述第一限制条件后，当所述当前周期之后的周期内所述无线信道中的RB利用率满足所述第二限制条件，确定MCS限制值。
  8. 根据权利要求7所述的确定调制编码方式MCS的方法，其中，在所述当所述当前周期之后的周期内所述无线信道中的RB利用率满足所述第二限制条件，确定MCS限制值之后，所述方法还包括：
    在满足预设的退出限制条件后，当所述无线信道中的RB利用率满足所述第一限制条件，确定MCS限制值；其中，所述退出限制条件为：在所述当前周期后的N个周期内均检测到所述MCS限制值大于所述MCS值，所述N为大于1的自然数，所述N个周期均对应有各自的MCS限制值和MCS值。
  9. 一种确定调制编码方式MCS的设备，包括：存储器、处理器、存储在所述存储器上并可在所述处理器上运行的程序以及用于实现所述处理器和所述 存储器之间的连接通信的数据总线，所述程序被所述处理器执行时实现如权利要求1-8中任一项所述的确定调制编码方式MCS的方法的步骤。
  10. 一种存储介质，用于计算机可读存储，存储有一个或者多个程序，所述一个或者多个程序可被一个或者多个处理器执行，以实现权利要求1-8中任一项所述的确定调制编码方式MCS的方法的步骤。
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