WO2017088147A1

WO2017088147A1 - Method and base station for realizing adaptive modulation and coding

Info

Publication number: WO2017088147A1
Application number: PCT/CN2015/095685
Authority: WO
Inventors: 严平; 李英伦
Original assignee: 华为技术有限公司
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2017-06-01

Abstract

Provided are a method and a base station for realizing AMC. The method comprises: a base station instructing user equipment (UE) not to report a channel quality indicator (CQI), and sending to the UE the data information, the amount of which satisfies a first time window and which carries a first scheduling modulation and coding scheme (MCS); the base station determining, according to the feedback information corresponding to the data information, a first block error ratio (BLER) within the first time window that the first scheduling MCS corresponds to, and determining, according to the first BLER and a target BLER, a second scheduling MCS. This invention does not require the UE to feed back the CQI, avoiding the waste of air interface resources.

Description

Method and base station for implementing adaptive modulation coding

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to a method and a base station for implementing adaptive modulation and coding.

Background technique

The Adaptive Modulation and Coding (AMC) technology selects an appropriate modulation and coding scheme (MCS) according to the change of the radio channel, and the base station side according to the user's instantaneous channel quality indicator (Channel Quality Indicator, referred to as The CQI) and the current most suitable MCS are used to enable the user equipment (User Equipment, UE for short) to use the appropriate MCS to demodulate the data sent by the base station to the UE, and then send corresponding feedback information to the base station, and the feedback information may include affirmation. The Acknowledgement (ACK) information or the Negative Acknowledgement (NACK) information, the appropriate MCS selected by the base station, enables the UE to achieve the highest possible data throughput rate. When the UE is in a favorable communication location (such as near a base station or a line-of-sight link), the base station side selects a high-order modulation and a high-rate channel coding mode, that is, the MCS takes a large value, thereby obtaining a higher data transmission rate. (Data transmission traffic is large); when the user is in an unfavorable communication location (such as at the cell edge or deep fading of the channel), the base station side selects a low-order modulation mode and a low-rate channel coding scheme, that is, the MCS takes a small value. Thereby ensuring the reliability of the communication link.

However, in the scenario where the transmitter and the receiver do not move or other channel quality is gradual or even a static channel, the method for implementing the AMC in the prior art still needs to measure or report the CQI of the UE periodically or aperiod, resulting in air interface resources. Waste.

Summary of the invention

The embodiments of the present invention provide a method and a base station for implementing adaptive modulation and coding, which are used to solve the problem that the UE needs to periodically or non-periodly measure and report CQI in the AMC, which causes waste of air interface resources.

In a first aspect, an embodiment of the present invention provides a method for implementing adaptive modulation and coding AMC, including:

The base station indicates that the user equipment UE does not report the channel quality indicator CQI;

Sending, by the base station, the data information that meets the first time window to the UE, where the data information includes a current first scheduling modulation and coding mode MCS of the base station;

Determining, by the base station, the first block error rate BLER in the first time window corresponding to the first scheduling MCS according to the obtained feedback information corresponding to the data information, and according to the first BLER and the pre- The target BLER is determined, and the second scheduling MCS is determined. The difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.

With the method for implementing AMC provided by the first aspect, the base station indicates that the UE does not report the CQI, and the base station may determine, by using feedback information of the UE, the first BLER in the first time window corresponding to the first scheduling MCS, and according to the first BLER and The preset target BLER determines the second scheduling MCS, so that the difference between the error block rate and the target BLER when the UE processes the data by using the second scheduling MCS is not greater than a preset threshold, so the method provided by the first aspect may The actual scheduled MCS is determined by the feedback information sent by the UE, and the UE does not need to feed back the CQI, thereby reducing the power consumption of the UE and avoiding waste of air interface resources.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by the base station, the second scheduling MCS, according to the first BLER and the preset target BLER, specifically includes:

The base station performs an update determining operation, and determines the second scheduling MCS. The update determining operation includes:

Determining, by the base station, whether a difference between the first BLER and the target BLER is greater than the preset threshold;

If yes, the base station updates the current statistical MCS of the UE according to the preset adjustment policy, obtains an updated statistical MCS, and determines a new first scheduling MCS according to the updated statistical MCS;

Acquiring, by the base station, the second BLER in the new first time window corresponding to the new first scheduling MCS according to the new first scheduling MCS, and returning the second BLER as a new first BLER. Performing the update determining operation until the difference between the new first BLER and the target BLER is not greater than the preset threshold, and determining the new first scheduling MCS as the second scheduling MCS .

In conjunction with the first possible implementation of the first aspect, the second possible implementation in the first aspect In the implementation manner, the base station updates the current statistic MCS of the UE according to the preset adjustment policy, and obtains the updated statistic MCS, which specifically includes:

When the base station determines that the first BLER is smaller than the target BLER, the base station determines that the updated statistical MCS=the current statistical MCS of the UE+the preset MCS lifting adjustment parameter;

When the base station determines that the first BLER is greater than the target BLER, the base station determines that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the determining, by the base station, the new first scheduling MCS according to the updated statistical MCS includes:

The base station performs a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS satisfies the MCS range in the communication protocol.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the base station performs a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, specifically includes:

The base station rounds down the updated statistical MCS to obtain a third scheduling MCS, where the third scheduling MCS does not satisfy the MCS range in the communication protocol;

Determining, by the base station, that the new first scheduling MCS is a minimum value in a maximum MCS of the third scheduling MCS and a communication protocol; or, the base station determining that the new first scheduling MCS is the third The maximum value in the minimum MCS in the MCS and communication protocol is scheduled.

After the method provided by each of the foregoing possible implementation manners, after determining the updated statistical MCS, the base station performs a rounding operation on the statistical MCS to determine that the new first scheduling MCS is the third of the third scheduling MCS and the communication protocol. a minimum value in the MCS; or, determining that the new first scheduling MCS is the maximum of the third MCS and the minimum MCS in the communication protocol, that is, the base station performs a rounding operation to ensure that the base station can determine an accurate Scheduling the MCS, the determined scheduling MCS is within the MCS of the communication protocol, ensuring the reliability of data transmission between the base station and the UE; in addition, it does not require the UE to separately transmit the CQI, thereby reducing the power consumption of the UE and avoiding Waste of air interface resources.

In conjunction with the first possible implementation of the first aspect, the fourth possible implementation of the first aspect, in a fifth possible implementation of the first aspect, the base station Before the UE sends the data information that satisfies the first time window, the method further includes:

The base station initializes statistical MCS information and scheduling MCS information maintained by the base station.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the base station determines a first error in the first time window corresponding to the first scheduling MCS The block rate BLER includes:

The base station according to the formula:

Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.

With reference to the first aspect to any one of the sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the determining, by the base station, that the user equipment UE does not report the CQI includes:

The base station sends CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.

Through the method provided by the foregoing possible implementation manner, the base station initializes the statistical MCS information and the scheduled MCS information before transmitting the data information for the first time, thereby ensuring the reliability of the communication link.

In a second aspect, an embodiment of the present invention provides a base station, including:

The indication module is configured to indicate that the user equipment UE does not report the channel quality indicator CQI;

a sending module, configured to send, to the UE, a quantity of data that meets a first time window; where the data information includes a current first scheduling modulation and coding mode MCS of the base station;

a determining module, configured to determine, according to the obtained feedback information corresponding to the data information, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the first BLER And determining, by the preset target BLER, the second scheduling MCS, where the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining module includes a first determining submodule;

The first determining sub-module is configured to perform an update determining operation, and determine the second scheduling MCS, where the update determining operation includes:

Determining whether a difference between the first BLER and the target BLER is greater than the preset threshold;

If yes, the current statistical MCS of the UE is updated according to the preset adjustment policy, and the updated statistical MCS is obtained, and the new first scheduled MCS is determined according to the updated statistical MCS.

Obtaining, according to the new first scheduling MCS, a second BLER in a new first time window corresponding to the new first scheduling MCS, and using the second BLER as a new first BLER, returning to perform the And updating the determining operation until the difference between the new first BLER and the target BLER is not greater than the preset threshold, and determining the new first scheduling MCS as the second scheduling MCS.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the first determining submodule includes a determining unit and a first determining unit;

The first determining unit is configured to: when the determining unit determines that the first BLER is smaller than the target BLER, determine that the updated statistical MCS=the current statistical MCS of the UE+the preset MCS lifting adjustment parameter And determining, by the determining unit, that the first BLER is greater than the target BLER, determining that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the first determining submodule further includes a second determining unit;

The second determining unit is configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS meets the MCS range in the communication protocol.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the second determining unit is specifically configured to round down the updated statistical MCS to obtain Third scheduling the MCS, and determining that the new first scheduling MCS is a minimum value of the third MCS and the maximum MCS in the communication protocol; or determining that the new first scheduling MCS is the third A maximum of the minimum MCS in the MCS and the communication protocol is scheduled, the third scheduled MCS not satisfying the MCS range in the communication protocol.

With reference to the first possible implementation manner of the second aspect, the fourth possible implementation manner of the second aspect, in the fifth possible implementation manner of the second aspect, the base station further includes:

The initialization module is configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the sending module sends the data information that meets the first time window to the UE.

With reference to the fifth possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, the determining module further includes a second determining submodule;

The second determining submodule is configured according to a formula:

With reference to any one of the second aspect to the sixth possible implementation manner of the second aspect, in the seventh possible implementation manner of the second aspect, the indication module is specifically configured to send the CQI to the UE The CQI configuration information is used to indicate that the UE does not report the CQI.

The technical effects brought by the foregoing second aspect and the possible implementation manners of the second aspect may be related to the technical effects brought about by the foregoing first aspect and the possible implementation manners of the first aspect, and details are not described herein again. .

In a third aspect, an embodiment of the present invention provides a base station, including:

And a transmitter, configured to indicate that the user equipment UE does not report the channel quality indication CQI, and send the data information that meets the first time window to the UE, where the data information includes the current first scheduling modulation and coding of the base station. Mode MCS;

a processor, configured to determine, according to the obtained feedback information corresponding to the data information, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the first BLER And determining, by the preset target BLER, the second scheduling MCS, where the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the processor is configured to perform an update determining operation, and determine the second scheduling MCS, where the updating determining operation includes:

Obtaining, according to the new first scheduling MCS, a second BLER in a new first time window corresponding to the new first scheduling MCS, and using the second BLER as a new first BLER, returning to perform the Updating the determining operation until the difference between the new first BLER and the target BLER is not greater than the preset threshold, and determining the new first scheduling MCS as the second scheduling MCS.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the processor is configured to update a current statistic MCS of the UE according to a preset adjustment policy, Updated statistical MCS, including:

The processor is configured to determine, when the first BLER is smaller than the target BLER, the updated statistical MCS=the current statistical MCS of the UE+the preset MCS lifting adjustment parameter; When the first BLER is greater than the target BLER, it is determined that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the processor is configured to determine, according to the updated statistical MCS, a new first scheduled MCS, Specifically include:

The processor is specifically configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS meets the MCS range in the communication protocol.

With reference to the second possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the processor is configured to perform a rounding operation on the updated statistical MCS, and determine The new first scheduling MCS includes:

The processor is specifically configured to round down the updated statistical MCS to obtain a third scheduling MCS, and determine that the new first scheduling MCS is the third MCS and the largest MCS in the communication protocol. a minimum value; or determining that the new first scheduling MCS is a maximum value among the third MCS and a minimum MCS in a communication protocol, the third scheduling MCS not satisfying the MCS range in the communication protocol .

With reference to any one of the first possible implementation of the third aspect to the fourth possible implementation of the third aspect, in a fifth possible implementation of the third aspect, the processor is further And configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the transmitter sends the data information that meets the first time window to the UE.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the processor is configured to determine, in the first time window corresponding to the first scheduling MCS The first block error rate BLER includes:

The processor is specifically configured according to a formula:

With reference to any one of the third aspect to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the transmitter is configured to indicate that the user equipment UE does not report the CQI Specifically, including:

The transmitter is specifically configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.

The technical effects brought by the foregoing third aspect and the possible implementation manners of the third aspect may be corresponding to the technical effects brought about by the foregoing first aspect and the possible implementation manners of the first aspect, and details are not described herein again. .

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is a schematic diagram of a network architecture of an LTE system according to an embodiment of the present disclosure;

2 is a signaling flowchart of Embodiment 1 of a method for implementing AMC according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of Embodiment 2 of a method for implementing AMC according to an embodiment of the present disclosure;

4 is a schematic flowchart of an update determination operation according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of performing a rounding operation on a new first scheduling MCS according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 1 of a base station according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of Embodiment 2 of a base station according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of Embodiment 3 of a base station according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of Embodiment 4 of a base station according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of Embodiment 5 of a base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The method for implementing AMC in this application can be applied to a network architecture of a Long Term Evolution (LTE) system, and can also be applied to a network architecture of a next-generation (4.5G or 5G) communication system, and can also be applied to a network. Non-wireless communication systems with ACK feedback and AMC schemes, such as copper cables, fiber-optic communication systems, etc. For example, as shown in FIG. 1 , an LTE system is used as an example, and the LTE system includes a user equipment, an Evolved Node B (eNodeB), and an Evolved Packet Core (EPC). The EPC is responsible for the core network part, the signaling processing part is the Mobility Management Entity (MME), the data processing part is the Serving Gateway (S-GW), and the eNode B is responsible for the access network part. It is called the evolved UMTS Terrestrial Radio Access Network (Evolved UTRAN, Evolved UTRAN). The LTE system supports interoperability with other 3GPP systems. According to the duplex mode, the LTE system is divided into a Frequency Division Duplexing (LTE) system (Frequency Division Duplexing-LTE) and a Time Division Duplexing (LTE) system. Referred to as TDD-LTE).

For the above LTE system, 4.5G communication system, and future 5G communication system, these communication systems have many communication scenarios, and scenes for which certain transmitters and receivers do not move or other channel quality gradual changes or even static channel scenarios, For example, some Internet of Things (IOT) scenarios, wireless remote meter reading systems, and small cell (Small Cell) wireless backhaul scenarios, in which the channel changes are slow or even constant. A method for implementing the AMC in the prior art, the user equipment (User Equipment, UE for short) needs to report the CQI to the base station periodically or aperiodically, so that the base station can select a suitable MCS to schedule data transmission of the UE (the MCS is the scheduling MCS, ie, MCS _Schedule ), the UE finally sends ACK information or NACK information to it; however, the AMC method of the prior art, for some static channel or slow channel communication scenario, undoubtedly causes the UE's power consumption and air interface resources. Waste.

The method for implementing AMC provided by the embodiment of the present invention is to solve the problem that the UE is required in the prior art. Periodic or aperiodic measurement and reporting of CQI, resulting in a large technical problem of the UE's power consumption and the waste of air interface resources.

In addition, the base station involved in the embodiment of the present invention may refer to a device in the access network that communicates with the wireless terminal through one or more sectors on the air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, which is not limited in this application.

The UE involved in the embodiment of the present invention may be a wireless terminal. The wireless terminal includes a device that provides voice and/or data services to the user. Alternatively, the device can be a handheld device with wireless connectivity, or other processing device connected to the wireless modem. Moreover, the wireless terminal can also communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), for example, the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" "Phone" and a computer having a mobile terminal, which may be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device that can interact with the core network for voice and/or data.

The technical solutions of the present invention will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

FIG. 2 is a signaling flowchart of Embodiment 1 of a method for implementing AMC according to an embodiment of the present invention. The embodiment relates to a specific process in which the UE does not need to report the CQI to the base station, and the base station determines, by using the collected feedback information, the MCS of the data transmission of the final scheduling UE (ie, the second scheduling MCS in the following implementation). As shown in Figure 2, the method includes:

S101. The base station indicates that the user equipment UE does not report the CQI.

Optionally, the base station may send, to the UE, an indication message that is used to indicate that the UE does not report the CQI, and the indication message may be a CQI configuration message, and may also be a bit identifier carried in the downlink reference signal, and may also be other types of indication messages. The method of the present invention does not limit how the base station indicates that the UE does not report the CQI.

S102. The base station sends, to the UE, the data information that meets the first time window.

The data information includes a current first scheduling modulation and coding manner of the base station. MCS.

Specifically, the first time window herein may be a time period, and the base station sends a certain amount of data information in the first time window, and the quantity of the data information may fill the entire first time window, that is, send the quantity of data. The time occupied by the information is equal to the length of the first time window; optionally, the number of the data information may not be filled with the first time window, and the first time window is only used as a time range for counting feedback information of the UE. The data information sent by the base station to the UE may include the current first scheduled MCS and the data packet of the base station, and after receiving the data information, the UE demodulates and decodes the data packet in the data information by using the first scheduling MCS. And so on, so that the feedback information of the data information can be sent to the base station.

Optionally, the first scheduling MCS may be an MCS of any order specified by the communication protocol.

S103. The UE sends the feedback information corresponding to the data information to the base station.

It should be noted that the feedback information sent by the UE to the base station is feedback information corresponding to all data information in the first time window.

S104. The base station determines, according to the feedback information, a first block error rate (BLER) in the first time window corresponding to the first scheduling MCS, and according to the first BLER and the preset The target BLER determines the second scheduled MCS.

Specifically, the base station performs statistics on the feedback information sent by the UE, that is, the base station collects the feedback information corresponding to the data information in the first time window, and determines the acknowledgement (ACK) information and the negative acknowledgement (NACK) information in the feedback information. And determining the first BLER in the first time window according to the quantity of the foregoing data information, where the first BLER corresponds to a block error rate of data processed by the UE by using the first scheduled MCS.

After the base station obtains the first BLER, the base station adjusts the current first scheduling MCS according to the preset target BLER, and determines a suitable second scheduling MCS, where the second scheduling MCS can ensure that the UE adopts the first The difference between the BLER and the target BLER that is demodulated and decoded by the second scheduling MCS is not greater than a preset threshold (or the BLER corresponding to the second scheduling MCS converges to the target BLER). Optionally, the target BLER may be 1%. Optionally, the second scheduling MCS may be the first scheduling MCS, that is, the first BLER obtained by the base station according to the feedback information sent by the UE after using the first scheduling MCS, and the difference between the target BLER and the target BLER is not greater than the foregoing The threshold is set, and the base station can use the first scheduling MCS as the second scheduling MCS. Optionally, when the base station determines that the first BLER is greater than the target BLER, and the difference between the two is greater than a preset threshold, The first scheduling MCS has a higher order, and the base station can appropriately reduce the order of the MCS, thereby obtaining a second MCS that can ensure that the difference between the error block rate and the target block error rate is not greater than a preset threshold; when the base station determines the first BLER If the difference between the two is greater than the preset threshold, the first scheduling MCS has a lower order, and the base station can appropriately increase the MCS order, thereby obtaining a block error rate and a target block rate. The second MCS whose difference is not greater than a preset threshold.

The method for implementing the AMC according to the embodiment of the present invention, the base station instructs the UE not to report the CQI, and the base station determines the first BLER in the first time window corresponding to the first scheduling MCS by using the feedback information of the UE, and further, according to the first BLER and the pre- The target BLER is configured to determine the second scheduling MCS, so that the difference between the block error rate and the target BLER when the UE processes the data by using the second scheduling MCS is not greater than a preset threshold, so the method provided by the embodiment of the present invention may pass The feedback information sent by the UE determines the MCS that is actually scheduled, and does not require the UE to feed back the CQI, thereby reducing the power consumption of the UE and avoiding waste of air interface resources.

FIG. 3 is a schematic flowchart of Embodiment 2 of a method for implementing AMC according to an embodiment of the present disclosure. This embodiment relates to a specific process of determining, by the base station, the second scheduled MCS according to the first BLER and the target BLER. As shown in FIG. 3, the foregoing S104 specifically includes: the base station performs an update determining operation, and determines the second scheduling MCS.

Specifically, the foregoing update judging operation is a process of continuously looping. In order to explain the process of the base station performing the update judging operation more clearly, the flow diagram shown in FIG. 4 is taken as an example for description. Referring to FIG. 4, the update is performed. The judgment operation specifically includes:

S201. The base station determines whether a difference between the first BLER and the target BLER is greater than the preset threshold. If not, execute S204; if yes, execute S202.

Specifically, the base station generally maintains a plurality of statistical MCSs (MCS _Statistics ), and each of the statistical MCSs corresponds to one UE, that is, the base station internally maintains a statistical MCS corresponding to multiple UEs, and one statistical MCS (MCS _Statistic ) corresponds to one scheduling MCS. (MCS _Schedule ). Taking the above-mentioned UE as an example, the current statistical MCS of the UE is set to MCS _Statistic A, and the scheduling MCS corresponding to the statistical MCS is the first scheduling MCS (set to MCS _Schedule a). Optionally, in order to ensure the reliability of the communication, the base station may initialize the internal MCS information and the scheduled MCS information, that is, after the initialization, the current MCS of the UE is MCS 0, and the first scheduled MCS is also MCS 0.

As described in the first embodiment, the base station may determine the first BLER according to the feedback information of the UE. Specifically, the base station may use the formula according to the formula.

Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) The feedback information of the i-th data information sent by the UE, and when the UE can correctly parse the i-th data information, the value of ACK(i) is 1, when the UE cannot correctly parse the i-th data information. When ACK(i) has a value of 0.

After the base station determines the first BLER, the base station determines whether the difference between the first BLER and the target BLER is greater than a preset threshold, and obtains a corresponding determination result.

S202. The base station updates the current statistical MCS of the UE according to the preset adjustment policy, obtains an updated statistical MCS, and determines a new first scheduling MCS according to the updated statistical MCS.

Specifically, when the result of the foregoing determination is that the difference between the first BLER and the target BLER is greater than a preset threshold, the base station updates the current statistical MCS of the UE according to the preset adjustment policy, to obtain the updated statistical MCS. If this is the first judgment of the base station (that is, the update of the first statistical MCS is performed), that is, the current statistical MCS of the UE is MCS _Statistic A, and the base station performs the current statistical MCS of the UE according to the adjustment policy (MCS _Statistic). A) Updated to MCS _Statistic B (MCS _Statistic B is the statistical MCS after this update). Afterwards, the base station performs a rounding operation on the updated statistical MCS to obtain a new first scheduling MCS (assumed to be MCS _Schedule b).

Optionally, the base station updates the current statistic MCS of the UE according to the preset adjustment policy, where the base station determines that the updated statistic MCS=the current statistic MCS of the UE+the preset MCS rises when the base station determines that the first BLER is smaller than the target BLER. Adjusting the parameter (α); when the base station determines that the first BLER is greater than the target BLER, the base station determines the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter (β). For example, when the base station performs the first update of the statistical MCS, when the base station determines that the first BLER is greater than the target BLER, the MCS _Statistic B=MCS _Statistic A+α, when the base station determines that the first BLER is smaller than the target BLER, The above MCS _Statistic B = MCS _Statistic A-β. Optionally, in order to ensure the reliability of the communication link, a "slow up and down" scheme (where α<β<1) is used, for example, α=0.01, β=0.05.

S203. The base station acquires, according to the new first scheduling MCS, the second BLER in the new first time window corresponding to the new first scheduling MCS, and returns the second BLER as the new first BLER, and returns to step S201. Until the difference between the new first BLER and the target BLER is not greater than the And ending the threshold, and determining the new first scheduling MCS as the second scheduling MCS.

Specifically, after the base station determines the new first scheduling MCS (MCS _Schedule b), the new first scheduling MCS (MCS _Schedule b) is used to send a certain amount of data information to the UE again. Optionally, the base station may adopt the new first scheduling MCS (MCS _schedule b) re-transmitting one or more data information to the UE, the UE transmits feedback information when the data information to the base station, the sliding window mechanisms can be employed, within a first time window corresponding to the The feedback information of the first data information or the feedback information of the first few data information is discarded. For example, it is assumed that the base station sends two pieces of data information to the UE again by using the new first scheduling MCS (MCS _Schedule b), and the UE sends the data information to the base station. After feedback of two feedback information (P' and P respectively), the base station adopts a sliding window mechanism to discard the feedback information of the first two pieces of data information located in the first time window, and the above feedback information P' and P Adding to the first time window, the first time window may be referred to as a new first time window, and the base station may count the BLER in the new first time window, that is, counting the new first scheduling MCS (MCS _Schedule) b) Corresponding second BLER Optionally, the base station may not adopt the sliding window mechanism, that is, the base station completely discards the feedback information in the first time window, and the time period in which the feedback information P′ and P′ are obtained is referred to as a new first time window. Then, the BLER in the new first time window is counted, and in fact, the second BLER corresponding to the new first scheduling MCS (MCS _Schedule b) is counted.

After the second BLER is used as the new first BLER, the base station re-determines whether the difference between the new first BLER and the target BLER is greater than a preset threshold. If not, the base station determines the new scheduled MCS (MCS _Schedule). b) is the second scheduling MCS; if still greater than, the base station updates the current statistical MCS of the UE again (the current statistical MCS of the UE is MCS _Statistic B), and obtains the updated MCS (assumed to be MCS _Statistic C), after which The base station performs a rounding operation on the updated statistical MCS (MCS _Statistic C) again, and obtains a new first scheduling MCS (assumed to be MCS _Schedule c) again, and according to the new first scheduling MCS (MCS _Schedule) c) transmitting a certain amount of data information to the UE again, and counting the feedback information in the new first time window to obtain the second BLER corresponding to the new first scheduling MCS (MCS _Schedule c), and again As the new first BLER, the second BLER continues to perform S201, and determines whether the difference between the new first BLER and the target BLER is greater than a preset threshold, until the difference between the new first BLER and the target BLER is not greater than a preset threshold. So far, you can The new first scheduling MCS is determined to be the second scheduling MCS.

S204. The base station determines that the second scheduling MCS is the first scheduling MCS.

That is, the base station uses the current first scheduling MCS as the second scheduling MCS.

In addition, the foregoing base station performs a rounding operation on the updated statistical MCS to obtain a new first scheduling MCS, where the new first scheduling MCS satisfies the MCS range in the communication protocol; however, when the base station updates the updated MCS After the rounding down, the obtained scheduling MCS exceeds the MCS range specified in the communication protocol, the scheduling MCS cannot be used as the new first scheduling MCS, and corresponding processing is needed to obtain a new first scheduling MCS. For details, refer to the steps shown in Figure 5, including:

S301. The base station rounds down the updated statistical MCS to obtain a third scheduling MCS, where the third scheduling MCS does not satisfy the MCS range in the communication protocol.

S302. The base station determines that the new first scheduling MCS is a minimum value of the third MCS and the maximum MCS in the communication protocol. Alternatively, the base station determines that the new first scheduling MCS is the third. The maximum value in the minimum MCS in the MCS and communication protocol is scheduled.

The method for implementing the AMC according to the embodiment of the present invention, the base station instructs the UE not to report the CQI, and the base station determines the first BLER in the first time window corresponding to the first scheduling MCS by using the feedback information of the UE, and further, according to the first BLER and the pre- The target BLER is configured to determine the second scheduling MCS, so that the difference between the block error rate and the target BLER when the UE processes the data by using the second scheduling MCS is not greater than a preset threshold, so the method provided by the embodiment of the present invention may pass The feedback information sent by the UE determines the MCS that is actually scheduled, and does not need the UE to feed back the CQI, thereby reducing the power consumption of the UE and avoiding waste of the air interface resources. In addition, the base station compares the MCS information before sending the data information for the first time. The MCS information is scheduled for initialization to ensure the reliability of the communication link.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The following is an embodiment of the apparatus of the present invention that can be used to carry out the method embodiments of the present invention. For details not disclosed in the device embodiments of the present invention, please refer to the method embodiments of the present invention. The modules involved in the following device embodiments may be implemented by software, may also be implemented by hardware, or may be implemented by a combination of software and hardware.

FIG. 6 is a schematic structural diagram of Embodiment 1 of a base station according to an embodiment of the present disclosure. As shown in Figure 6, The base station includes: an indication module 10, a sending module 11, a determining module 12, and a receiving module 13.

The indicating module 10 is configured to indicate that the user equipment UE does not report the channel quality indicator CQI;

The sending module 11 is configured to send, to the UE, a quantity of data information that satisfies a first time window, where the data information includes a current first scheduling modulation and coding mode MCS of the base station;

a determining module 12, configured to determine, according to the feedback information corresponding to the data information acquired by the receiving module 13, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and Determining, according to the first BLER and the preset target BLER, a second scheduling MCS, where a difference between a BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.

Optionally, the foregoing indicator module 10 may be separately or separately set from the sending module 11 or may be integrated. The indicating module 10 and the sending module 11 may be a transmitting and receiving antennas in the base station that cooperate with the radio frequency processing unit, and the determining module 12 may be a processor of the base station or a related hardware component in the processor.

The base station provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 7 is a schematic structural diagram of Embodiment 2 of a base station according to an embodiment of the present disclosure. On the basis of the embodiment shown in Figure 6, further, as shown in Figure 7, the above determining module 12, may include a first determining sub-module 121;

The first determining sub-module 121 is configured to perform an update determining operation, and determine the second scheduling MCS, where the update determining operation includes:

Further, on the basis of the embodiment shown in FIG. 7, refer to the structural diagram of Embodiment 3 of the base station shown in FIG. As shown in FIG. 8, the first determining submodule 121, the determining unit 1211 and the a determining unit 1212;

The first determining unit 1212 is configured to: when the determining unit 1211 determines that the first BLER is smaller than the target BLER, determine that the updated statistical MCS=the current statistical MCS of the UE+the preset MCS elevation Adjusting the parameter; determining, by the determining unit 1211, that the first BLER is greater than the target BLER, determining that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.

Continuing to refer to FIG. 8 , the first determining sub-module 121 further includes a second determining unit 1213, configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS. The new first scheduling MCS satisfies the MCS range in the communication protocol.

Further, the second determining unit 1213 is specifically configured to round down the updated statistical MCS to obtain a third scheduling MCS, and determine that the new first scheduling MCS is the third scheduling MCS and a minimum value in the maximum MCS in the communication protocol; or determining that the new first scheduling MCS is the maximum value in the third MCS of the third scheduling MCS and the communication protocol, the third scheduling MCS not satisfying The MCS range in the communication protocol.

Further, on the basis of the embodiment shown in FIG. 7 or FIG. 8, reference is made to the structural diagram of the fourth embodiment of the base station shown in FIG. As shown in Figure 9, the above base station may further include an initialization module 14;

The initialization module 4 is configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the sending module 11 sends the data information that satisfies the first time window to the UE.

With continued reference to Figure 9, the above determining module 12 may further include a second determining sub-module 122;

The second determining sub-module 122 is configured according to a formula: Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.

Further, the foregoing indication module 10 is specifically configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.

It should be noted that the structural diagram of the base station shown in FIG. 9 is shown based on the structure of the embodiment shown in FIG. 8. Of course, it can be shown based on the structure of FIG. 7, which is just an example.

The internal functional modules and structural diagrams of the base station are described above. The following embodiments describe the physical structure of the base station.

FIG. 10 is a schematic structural diagram of Embodiment 5 of a base station according to an embodiment of the present invention. As shown in FIG. 10, the base station may include: the terminal includes a transmitter 20, a processor 21, and a receiver 22. The transmitter 20 and the receiver 22 may be integrated in the transceiver of the base station, or may be an independent transceiver antenna on the base station. The base station according to the embodiment of the present invention may further include a power source 23, a memory 24, a communication bus 25, and a communication port 26. The communication bus 25 is used to implement a communication connection between components. The memory 24 may include a high speed RAM memory and may also include a non-volatile memory NVM, such as at least one disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiment. . The communication port 26 is used to implement connection communication between the base station and other peripheral devices.

The transmitter 20 is configured to indicate that the user equipment UE does not report the channel quality indication CQI, and send the data information that meets the first time window to the UE, where the data information includes the current first scheduling of the base station. Modulation and coding mode MCS;

The processor 21 is configured to determine, according to the feedback information corresponding to the data information acquired by the receiver 22, the first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the Determining, by the first BLER and the preset target BLER, the second scheduling MCS, where the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.

Further, the processor 21 is specifically configured to perform an update determining operation, and determine the second scheduling MCS. The update determining operation includes:

Further, the processor 21 is configured to: update the current statistic MCS of the UE according to the preset adjustment policy, and obtain the updated statistic MCS, specifically:

The processor 21 is configured to determine, when the first BLER is smaller than the target BLER, the updated statistical MCS=the current statistical MCS of the UE+the preset MCS lifting adjustment parameter; When the first BLER is greater than the target BLER, it is determined that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.

Further, the processor 21 is specifically configured to determine a new first scheduling MCS according to the updated statistical MCS, and specifically includes: the processor 21, configured to perform a downward fetching on the updated statistical MCS. In the whole operation, a new first scheduling MCS is determined, and the new first scheduling MCS satisfies the MCS range in the communication protocol. Further, the processor 21 is specifically configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, which specifically includes:

The processor 21 is specifically configured to round down the updated statistical MCS to obtain a third scheduling MCS, and determine that the new first scheduling MCS is the largest of the third scheduling MCS and the communication protocol. a minimum value in the MCS; or determining that the new first scheduling MCS is the maximum of the third MCS and the minimum MCS in the communication protocol, the third scheduling MCS not satisfying the MCS in the communication protocol range.

Optionally, the processor 21 is further configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the transmitter 20 sends the data information that meets the first time window to the UE.

Further, the processor 21 is configured to determine a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and specifically includes:

The processor 21 is specifically configured according to a formula:

Further, the transmitter 20 is configured to indicate that the user equipment UE does not report the CQI, and specifically includes:

The transmitter 20 is configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A method for implementing adaptive modulation coding AMC, comprising:

The base station indicates that the user equipment UE does not report the channel quality indicator CQI;

Sending, by the base station, the data information that meets the first time window to the UE, where the data information includes a current first scheduling modulation and coding mode MCS of the base station;

Determining, by the base station, the first block error rate BLER in the first time window corresponding to the first scheduling MCS according to the obtained feedback information corresponding to the data information, and according to the first BLER and the pre- The target BLER is determined, and the second scheduling MCS is determined. The difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
The method according to claim 1, wherein the determining, by the base station, the second scheduling MCS according to the first BLER and the preset target BLER, specifically includes:

The base station performs an update determining operation, and determines the second scheduling MCS. The update determining operation includes:

Determining, by the base station, whether a difference between the first BLER and the target BLER is greater than the preset threshold;

If yes, the base station updates the current statistical MCS of the UE according to the preset adjustment policy, obtains an updated statistical MCS, and determines a new first scheduling MCS according to the updated statistical MCS;

Acquiring, by the base station, the second BLER in the new first time window corresponding to the new first scheduling MCS according to the new first scheduling MCS, and returning the second BLER as a new first BLER. Performing the update determining operation until the difference between the new first BLER and the target BLER is not greater than the preset threshold, and determining the new first scheduling MCS as the second scheduling MCS .
The method according to claim 2, wherein the base station updates the current statistical MCS of the UE according to the preset adjustment policy, and obtains the updated statistical MCS, which specifically includes:

When the base station determines that the first BLER is smaller than the target BLER, the base station determines that the updated statistical MCS=the current statistical MCS of the UE+the preset MCS lifting adjustment parameter;

When the base station determines that the first BLER is greater than the target BLER, the base station determines that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.
The method according to claim 3, wherein the determining, by the base station, the new first scheduling MCS according to the updated statistical MCS includes:

The base station performs a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS satisfies the MCS range in the communication protocol.
The method according to claim 4, wherein the base station performs a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, which specifically includes:

The base station rounds down the updated statistical MCS to obtain a third scheduling MCS, where the third scheduling MCS does not satisfy the MCS range in the communication protocol;

Determining, by the base station, that the new first scheduling MCS is a minimum value in a maximum MCS of the third scheduling MCS and a communication protocol; or, the base station determining that the new first scheduling MCS is the third The maximum value in the minimum MCS in the MCS and communication protocol is scheduled.
The method according to any one of claims 2 to 5, wherein before the base station sends the data information that satisfies the first time window to the UE, the method further includes:

The base station initializes statistical MCS information and scheduling MCS information maintained by the base station.
The method according to claim 6, wherein the determining, by the base station, the first block error rate BLER in the first time window corresponding to the first scheduling MCS includes:

The base station according to the formula:
Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
The method according to any one of claims 1 to 7, wherein the base station indicates that the user equipment UE does not report the CQI, and specifically includes:

The base station sends CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.
A base station, comprising:

The indication module is configured to indicate that the user equipment UE does not report the channel quality indicator CQI;

a sending module, configured to send, to the UE, a quantity of data that meets a first time window; where the data information includes a current first scheduling modulation and coding mode MCS of the base station;

a determining module, configured to determine, according to the obtained feedback information corresponding to the data information, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the And determining, by the first BLER and the preset target BLER, a second scheduling MCS, where a difference between a BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
The base station according to claim 9, wherein the determining module comprises a first determining submodule;

The first determining sub-module is configured to perform an update determining operation, and determine the second scheduling MCS, where the update determining operation includes:

Determining whether a difference between the first BLER and the target BLER is greater than the preset threshold;

If yes, the current statistical MCS of the UE is updated according to the preset adjustment policy, and the updated statistical MCS is obtained, and the new first scheduled MCS is determined according to the updated statistical MCS.

Obtaining, according to the new first scheduling MCS, a second BLER in a new first time window corresponding to the new first scheduling MCS, and using the second BLER as a new first BLER, returning to perform the And updating the determining operation until the difference between the new first BLER and the target BLER is not greater than the preset threshold, and determining the new first scheduling MCS as the second scheduling MCS.
The base station according to claim 10, wherein the first determining submodule comprises a determining unit and a first determining unit;

The first determining unit is configured to: when the determining unit determines that the first BLER is smaller than the target BLER, determine that the updated statistical MCS=the current statistical MCS of the UE+the preset MCS lifting adjustment parameter And determining, by the determining unit, that the first BLER is greater than the target BLER, determining that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.
The base station according to claim 11, wherein the first determining submodule further comprises a second determining unit;

The second determining unit is configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS meets the MCS range in the communication protocol.
The base station according to claim 12, wherein the second determining unit is configured to round down the updated statistical MCS, obtain a third scheduling MCS, and determine the new first scheduling. The MCS is a minimum value among the third MCS and the maximum MCS in the communication protocol; or, determining that the new first scheduling MCS is a maximum value among the third MCS and the minimum MCS in the communication protocol, The third scheduling MCS does not satisfy the communication protocol MCS range.
The base station according to any one of claims 10 to 13, wherein the base station further comprises:

The initialization module is configured to initialize the statistical MCS information and the scheduled MCS information maintained by the base station before the sending module sends the data information that meets the first time window to the UE.
The base station according to claim 14, wherein the determining module further comprises a second determining submodule;

The second determining submodule is configured according to a formula:
Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
The base station according to any one of claims 9 to 15, wherein the indication module is specifically configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.
A base station, comprising:

And a transmitter, configured to indicate that the user equipment UE does not report the channel quality indication CQI, and send the data information that meets the first time window to the UE, where the data information includes the current first scheduling modulation and coding of the base station. Mode MCS;

a processor, configured to determine, according to the obtained feedback information corresponding to the data information, a first block error rate BLER in the first time window corresponding to the first scheduling MCS, and according to the first BLER And determining, by the preset target BLER, the second scheduling MCS, where the difference between the BLER corresponding to the second scheduling MCS and the target BLER is not greater than a preset threshold.
The base station according to claim 17, wherein the processor is specifically configured to perform an update determining operation, and determine the second scheduling MCS; wherein the updating determining operation comprises:

Determining whether a difference between the first BLER and the target BLER is greater than the preset threshold;

If yes, the current statistical MCS of the UE is updated according to the preset adjustment policy, and the updated statistical MCS is obtained, and the new first scheduled MCS is determined according to the updated statistical MCS.

Obtaining a new first corresponding to the new first scheduling MCS according to the new first scheduling MCS Returning, by using the second BLER in a time window, the second BLER as a new first BLER, performing the update determining operation until the difference between the new first BLER and the target BLER is not greater than Determining the threshold, and determining the new first scheduling MCS as the second scheduling MCS.
The base station according to claim 18, wherein the processor is configured to: update the current statistical MCS of the UE according to a preset adjustment policy, and obtain an updated statistical MCS, specifically:

The processor is configured to determine, when the first BLER is smaller than the target BLER, the updated statistical MCS=the current statistical MCS of the UE+the preset MCS lifting adjustment parameter; When the first BLER is greater than the target BLER, it is determined that the updated statistical MCS=the current statistical MCS of the UE-preset MCS drop adjustment parameter.
The base station according to claim 19, wherein the processor is configured to: determine, according to the updated statistical MCS, a new first scheduling MCS, specifically:

The processor is specifically configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, where the new first scheduling MCS meets the MCS range in the communication protocol.
The base station according to claim 19, wherein the processor is configured to perform a rounding operation on the updated statistical MCS to determine a new first scheduling MCS, which specifically includes:

The processor is specifically configured to round down the updated statistical MCS to obtain a third scheduling MCS, and determine that the new first scheduling MCS is the third MCS and the largest MCS in the communication protocol. a minimum value; or determining that the new first scheduling MCS is a maximum value among the third MCS and a minimum MCS in a communication protocol, the third scheduling MCS not satisfying the MCS range in the communication protocol .
The base station according to any one of claims 18 to 21, wherein the processor is further configured to initialize the data before the sender sends the data information that satisfies the first time window to the UE. Statistics MCS information and scheduling MCS information maintained by the base station.
The base station according to claim 22, wherein the processor is configured to determine a first block error rate BLER in the first time window corresponding to the first scheduling MCS, which specifically includes:

The processor is specifically configured according to a formula:
Determining the first BLER; wherein the i is the i-th data information in the first time window, and the M is the number of data information in the first time window; the ACK (i) And feedback information of the i-th data information sent by the UE.
The base station according to any one of claims 17 to 23, wherein the transmitter is configured to indicate that the user equipment UE does not report the CQI, and specifically includes:

The transmitter is specifically configured to send CQI configuration information to the UE, where the CQI configuration information is used to indicate that the UE does not report the CQI.