WO2016119128A1 - Method for selecting modulation and coding scheme and base station - Google Patents

Abstract

Embodiments of the present invention relate to a method for selecting a modulation and coding scheme and a base station. The method comprises: acquiring an average signal to interference plus noise ratio (SINR) value and an average SINR difference value of a user equipment (UE) in a statistics period, wherein the statistics period comprises N transmission time intervals (TTIs) before a current TTI, and N>1; determining a target initial block error rate (IBLER) value of the UE according to the average SINR value and the average SINR difference value; acquiring a measured IBLER value of the UE at the current TTI; adjusting a filtered SINR value of the UE according to the measured IBLER value and the target IBLER value, so as to acquire a final SINR value of the UE; and selecting a modulation and coding scheme (MCS) for the UE according to the final SINR value. In view of the above, in the embodiments of the present invention, the target IBLER value determined in the foregoing manner can reflect the actual channel quality fluctuations, and the MCS selected according to the method can improve the spectral efficiency of the UE and thus increase the throughput rate of the UE.

Description

Modulation coding method selection method and base station Technical field

The present invention relates to the field of mobile communications, and in particular, to a method and a base station for selecting a modulation and coding scheme.

Background technique

In a wireless mobile communication system, the wireless environment changes abruptly with time and space, so that the received signal may have different degrees of attenuation when the transmitted signals are the same. In the Long Term Evolution (LTE) system, in order to obtain stable system performance, Adaptive Modulation and Coding (AMC) is adopted.

In the prior art, the initial block error rate (IBLER) target value in the selection method of the Modulation and Coding Scheme (MCS) cannot reflect the real-time change of the channel in the actual system, and the existing The selection method of the MCS, User Equipment (UE) cannot achieve high data throughput.

Summary of the invention

The embodiment of the invention provides a method for selecting a modulation and coding mode and a base station, which can effectively improve the data throughput rate of the UE.

In a first aspect, a method for selecting a modulation coding method is provided, the method comprising:

Obtaining a signal to interference plus noise ratio (SINR) average value and an SINR average difference value of the UE in the statistical period, where the statistical period includes a current transmission time interval (TTI) N TTIs, said N>1;

Determining an IBLER target of the UE according to the SINR average value and the SINR average difference value value;

Obtaining an IBLER measurement value of the UE in the current TTI;

And adjusting an SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value, and acquiring a final SINR value of the UE;

The MCS is selected for the UE according to the SINR final value.

In a second aspect, a base station is provided, the base station comprising:

An acquiring unit, configured to obtain an average SINR value and an SINR average difference value of the UE in the statistical period, where the statistical period includes N TTIs before the current TTI, where N>1;

a determining unit, configured to determine an IBLER target value of the UE according to an SINR average value and an SINR average difference value acquired by the acquiring unit;

The acquiring unit is further configured to acquire an IBLER measurement value of the current TTI UE;

And an adjusting unit, configured to adjust an SINR filtering value of the UE according to an IBLER measurement value acquired by the acquiring unit and an IBLER target value determined by the determining unit, to obtain a final SINR value of the UE;

And a selecting unit, configured to select an MCS for the UE according to the final value of the SINR obtained by the adjusting unit.

In a third aspect, a base station is provided, where the base station includes:

Memory

processor;

The memory for storing instructions or code;

The processor is configured to invoke the instruction or code stored by the memory, and perform the following processing:

Obtaining an average SINR value and a SINR average difference value of the UE in the statistical period, where the statistical period includes N TTIs before the current TTI, where N>1;

Determining an IBLER target value of the UE according to the SINR average value and the SINR average difference value;

Obtaining an IBLER measurement value of the UE in the current TTI;

And adjusting an SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value, and acquiring a final SINR value of the UE;

The MCS is selected for the UE according to the SINR final value.

The embodiment of the present invention provides a method for selecting an MCS, determining an IBLER target value of the UE according to the SINR average value and the SINR average difference value, and adjusting the SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value to obtain the SINR of the UE. The value, and based on the final value of the SINR, selects the MCS for the UE. Since the SINR average value and the SINR average difference value can reflect the actual channel quality fluctuation condition, the MCS selection method with respect to the fixed IBLER target value can improve the spectrum efficiency of the UE, thereby improving the throughput rate of the UE.

DRAWINGS

1 is a schematic structural diagram of a wireless communication network;

2 is a flowchart of a method for selecting a modulation and coding mode according to Embodiment 1 of the present invention;

3 is a schematic diagram of a method for determining an IBLER target value according to an embodiment of the present invention;

4 is a schematic diagram of another method for determining an IBLER target value according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base station according to Embodiment 2 of the present invention;

FIG. 6 is a schematic structural diagram of another base station according to Embodiment 3 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be described in conjunction with the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are part of the present invention. Embodiments, but 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.

1 is a schematic structural diagram of a wireless communication network, such as the wireless communication network 100 shown in FIG. 1, the wireless communication network 100 includes a plurality of base stations 110 and other network entities for supporting a number of user settings. The device 120 communicates. For convenience of description, the following describes an LTE network as an example.

The base station 110 may be an evolved NodeB (eNB) in LTE. One base station 110 may support/manage one or more cells, and when the UE 120 needs to communicate with the network, it will select a cell to initiate access.

The UE 120 may also be referred to as a mobile terminal (MT), a mobile station (MS), or the like, and may communicate with one or more core networks via a Radio Access Network (RAN).

The core network device 130 is connected to one or more base stations 110, and the core network device 130 includes a Mobility Management Entity (MME).

2 is a flowchart of a method for selecting a modulation and coding mode according to Embodiment 1 of the present invention. The method is performed by a base station. Referring to FIG. 2, the method includes:

Step 201: Acquire an average value of a signal to interference plus noise ratio (SINR) of the UE in a statistical period and an average difference value of the SINR.

The statistics period includes N TTIs before the current Transmission Time Interval (TTI), where N>1.

The base station may obtain the SINR measurement value of the UE in each TTI of the N TTIs, and obtain the SINR average value and the SINR average difference value of the UE in the statistical period according to the N SINR measurement values.

Step 202: Determine an IBLER target value of the UE according to the SINR average value and the SINR average difference value.

Optionally, for the MCS selection to be more accurate, the moving speed of the UE may also be considered when determining the IBLER target value, that is, according to the moving speed of the UE, the SINR average value of the UE, and the SINR average difference value of the UE, The IBLER target value of the UE is determined.

Step 203: Acquire an IBLER measurement value of the UE in the current TTI.

The ratio of the number of times the initial transmission data is not correctly received and the number of non-acknowledgement (NACK) indication information is compared with the number of times the data is initially transmitted is called an IBLER measurement value.

Step 204: Adjust the SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value, and obtain a final SINR value of the UE.

The method for obtaining the SINR filtering value of the UE includes:

SINR filtering value of the current scheduling TTI = SINR filtering value *(1-a) of the previous scheduling TTI + SINR measurement value *a of the current TTI, a is configurable, 0 < a < 1.

Step 205: Select an MCS for the UE according to the final value of the SINR.

The embodiment of the present invention provides a method for selecting an MCS, determining an IBLER target value of the UE according to the SINR average value and the SINR average difference value, and adjusting the SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value to obtain the SINR of the UE. The value, and based on the final value of the SINR, selects the MCS for the UE. Since the SINR average value and the SINR average difference value can reflect the actual channel quality fluctuation condition, the MCS selection method with respect to the fixed IBLER target value can improve the spectrum efficiency of the UE, thereby improving the throughput rate of the UE.

Based on the first embodiment of the present invention, a selection method of the modulation and coding mode of the present invention will be described in detail below.

The SINR measurement value can be obtained by direct measurement or indirect measurement. When the direct measurement mode is adopted, the channel sounding reference signal (SRS) or the demodulation reference signal (Demodulation Reference Signal) sent by the UE to the base station is measured. The DMRS) base station acquires the SINR measurement value of the UE; when the indirect measurement mode is adopted, the base station receives the Power Headroom Report (PHR) reported by the UE and the Reference Signal Received Power (RSRP) of the UE. The SINR measurement of the UE is estimated.

The SINR average is the sum of the N SINR measurements divided by N. For example, for N=2, the SINR average = (SINR1 + SINR2)/2, where SINR1 is the SINR measurement of TTI1 and SINR2 is the SINR measurement of TTI2.

The SINR average difference value is an average value of the difference between the SINR measurement values of the UEs of the adjacent TTIs. For example, for N=2, the SINR average difference value=|SINR1-SINR2|, where SINR1 is the SINR measurement of TTI1, SINR2 is the SINR measurement of TTI2; for N=3, the SINR average difference Value = (|SINR2-SINR1|+|SINR3-SINR2|)/2, where SINR1 is the SINR measurement of TTI 1, SINR2 is the SINR measurement of TTI 2, and SINR3 is the SINR measurement of TTI 3.

The base station may acquire the SINR measurement value of the UE of each TTI of the N TTIs of the UE in the statistical period, and obtain the SINR average value and the SINR average difference value of the UE in the statistical period according to the N SINR measurement values. The statistics period includes N TTIs before the current TTI, where N>1.

Based on the SINR average and the SINR average difference value, the base station determines an IBLER target value for the UE.

In the embodiment of the present invention, the IBLER target value of the UE may be determined by combining the SINR average value and the SINR average difference value, and the IBLER target value of the UE may also be determined by one of the SINR average value and the SINR average difference value.

FIG. 3 is a schematic diagram of a method for determining an IBLER target value according to an embodiment of the present invention. In this method, an IBLER target value of the UE is determined by combining an SINR average value and an SINR average difference value. Referring to FIG. 3, the specific determining method includes:

When the SINR average difference value is greater than the SINR fluctuation upper threshold, determining that the first target value is the IBLER target value of the UE, or determining that the second target value is the IBLER target value of the UE when the SINR average difference value is less than the SINR fluctuation upper threshold, The first target value is greater than the second target value, for example, the first target value may be 30% and the second target value may be 10%. In the embodiment of the present invention, the IBLER target value may be set to the second target value in advance.

In the embodiment of the present invention, the IBLER target value of the UE is determined by combining the SINR average value and the SINR average difference value, and a larger IBLER target value may be selected when the channel fluctuation is large, and a smaller one is selected when the channel fluctuation is small. IBLER target value. Since the convergence value of the IBLER will increase when a larger IBLER target value is selected, the IBLER will rise, and when finally stabilized, the IBLER will converge to the set target value. After the IBLER rises, you can choose a higher order MCS. When a smaller IBLER target value is selected, the convergence value of the IBLER will decrease, so the IBLER will decrease.

When the channel fluctuations are different, sometimes the IBLER target value configuration is larger, which is beneficial to the uplink spectrum efficiency improvement. Sometimes the IBLER target value configuration is small, which is beneficial to the uplink spectrum efficiency improvement. According to the actual channel fluctuation condition, the IBLER target value is selected, which can improve the uplink spectrum efficiency of the UE.

Optionally, for the MCS selection to be more accurate, the moving speed of the UE may also be considered when determining the IBLER target value, that is, according to the moving speed of the UE, the SINR average value of the UE, and the SINR average difference value of the UE, The IBLER target value of the UE is determined.

The base station can determine the moving speed of the UE in multiple manners. For example, the base station can measure the Doppler frequency offset of the UE, and determine the moving speed of the UE according to the Doppler frequency offset of the UE.

FIG. 4 is a schematic diagram of another method for determining an IBLER target value according to an embodiment of the present invention, where the IBLER target value of the UE is determined according to the moving speed of the UE, the SINR average value of the UE, and the SINR average difference value of the UE. Referring to FIG. 4, the specific determining method includes:

When the SINR average difference value is greater than the upper threshold of the SINR fluctuation, determining that the first target value is the IBLER target value of the UE; or, when the SINR average value is less than the average SINR lower threshold, the SINR average difference value is less than the SINR fluctuation upper threshold, and If the moving speed is greater than the speed threshold, determining that the first target value is the IBLER target value of the UE; or, when the SINR average value is less than the average SINR lower threshold, the SINR average difference value is less than the SINR fluctuation upper threshold, and the moving speed is less than The speed threshold determines whether the second target value is the IBLER target value of the UE; or, when the SINR average value is greater than the average SINR lower threshold than the average SINR upper threshold, and the SINR average difference value is less than the SINR fluctuation upper threshold, determining the second The target value is the IBLER target value of the UE; or, when the SINR average value is greater than the average SINR upper threshold, and the SINR average difference value is greater than the SINR fluctuation lower threshold than the SINR fluctuation upper threshold, determining the second target value is the IBLER of the UE. a target value; or, when the SINR average is greater than an average SINR upper threshold, the SINR average difference value is less than a SINR fluctuation lower threshold, and the movement If the degree is greater than the speed threshold, determining that the third target value is the IBLER target value of the UE; or, when the SINR average value is greater than the average SINR upper threshold, the SINR average difference value is less than the SINR fluctuation lower threshold, and the moving speed is less than the speed The threshold determines that the second target value is an IBLER target value of the UE, and the first target value is greater than the second target value is greater than the third target value.

In the embodiment of the present invention, the SINR fluctuation threshold, the SINR fluctuation upper threshold, the average SINR lower threshold, the average SINR upper threshold, and the speed threshold may be preset, for example, the set speed threshold is 20 km/h; The first target value, the second target value, and the third target value may also be set in advance. For example, the first target value may be 30%, the second target value may be 10%, and the third target value may be 5%. In the embodiment of the present invention, the IBLER target value may be set to the second target value in advance.

It can be known from the above process that under high speed conditions, when the channel fluctuation is large, a larger IBLER target value is selected; when the channel fluctuation is small, according to the IBLER average value, a smaller IBLER target value is selected at a near point, at a far point. The larger IBLER target value is selected. In other cases, the IBLER target value is unchanged. The near point refers to the location where the user and the base station have a small path loss. In this case, selecting a smaller IBLER target value can obtain better spectral efficiency. Under low speed conditions, when the channel fluctuation is large, a larger IBLER target value is selected. In other cases, the IBLER target value is not changed. Since the convergence value of the IBLER will increase when a larger IBLER target value is selected, the IBLER will rise, and when finally stabilized, the IBLER will converge to the set target value. After the IBLER rises, you can choose a higher order MCS. When a smaller IBLER target value is selected, the convergence value of the IBLER will decrease, so the IBLER will decrease.

The base station acquires the IBLER measurement value of the UE in the current TTI, and adjusts the SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value to obtain the final SINR value of the UE.

When the IBLER measurement value is less than the IBLER target value, the SINR filtering value is adjusted upward by the first adjustment amount to obtain the final SINR value of the UE; or

When the IBLER measurement value is greater than the IBLER target value, the SINR filtering value is lowered by a second adjustment amount to obtain a final SINR value of the UE.

Specifically, when the IBLER measurement value is less than the IBLER target value, the first adjustment amount=adjustment step size*IBLER target value, SINR filter value+first adjustment amount=SINR final value;

When the IBLER measurement value is greater than the IBLER target value, the second adjustment amount=adjustment step size*(1-IBLER target value), SINR filter value-second adjustment amount=SINR final value; wherein the adjustment step size is configurable.

The base station selects an MCS for the UE according to the final value of the SINR.

After determining the final value of the SINR, the base station acquires the corresponding MCS according to the final value of the SINR. The base station sends the selected MCS to the UE through the downlink control channel.

In the embodiment of the present invention, the SINR average value and the SINR average difference value of the UE in the statistical period are obtained first, and then the IBLER measurement value of the current TTI UE is obtained, or may be obtained first. The current IBLER measurement value of the UE in the current TTI, and then obtains the SINR average value and the SINR average difference value of the UE in the statistical period; and may simultaneously acquire the SINR average value and the SINR average difference value of the UE in the statistical period and the current TTI IBLER measurement of the UE. value.

Optionally, in the method for selecting the modulation and coding mode, the UE may also detect whether the UE is a Full Buffer UE, and the Full Buffer UE is a UE that has sufficient data volume and can obtain a scheduling opportunity each time. When the detection result is that the UE is a Full Buffer UE, the other steps of the method are performed.

Specifically, the UE may be configured to determine whether the UE meets the first condition and the second condition, where the first condition is that the ratio of the resource required by the UE to the system bandwidth is greater than the first proportional threshold, and the second condition is that the UE obtains the scheduled number of times and The proportion of the total number of scheduling times is greater than the second ratio threshold; when the UE satisfies the first condition and the second condition, it is confirmed that the UE is a Full Buffer UE.

In the embodiment of the present invention, when the UE is a Full Buffer UE, the method of selecting the modulation and coding mode is performed, and the modulation is performed when the UE is not a Full Buffer UE. The selection method of the coding mode produces a negative gain due to the change of the IBLER target value.

An embodiment of the present invention provides a method for selecting a modulation and coding mode, determining an IBLER target value of the UE according to an average SINR value and an SINR average difference value, or determining the UE according to a moving speed, an SINR average value, and an SINR average difference value. The IBLER target value is obtained by adjusting the SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value to obtain the final SINR value of the UE, and selecting the MCS for the UE according to the final value of the SINR. Since a larger IBLER target value is selected when the channel fluctuation is large, and a smaller IBLER target value is selected when the channel fluctuation is small, the spectrum efficiency of the UE can be improved with respect to the MCS selection method of the fixed IBLER target value. Improve the throughput of the UE.

FIG. 5 is a schematic structural diagram of a base station according to Embodiment 2 of the present invention. The base station is configured to perform a method for selecting an MCS according to Embodiment 1 of the present invention. Referring to FIG. 5, the base station includes:

The obtaining unit 501 is configured to obtain an average SINR value and an SINR average difference value of the UE in the statistical period, where the statistical period includes N TTIs before the current TTI, where N>1;

The obtaining unit 501 may obtain the SINR measurement value of the UE in each TTI of the N TTIs, and obtain an SINR average value and an SINR average difference value of the UE in the statistical period according to the N SINR measurement values.

The obtaining unit 501 can obtain the above SINR measurement value by two methods: direct measurement or indirect measurement. Optionally, the base station further includes a transceiver unit. When the direct measurement mode is adopted, the UE sends the SRS or the DMRS to the base station by using the transceiver unit, and the acquiring unit 501 obtains the SINR measurement value of the UE by measuring the SRS or the DMRS; The UE sends the PHR and the RSRP to the base station through the transceiver unit, and the obtaining unit 501 estimates the SINR measurement value of the UE according to the PHR and the RSRP.

a determining unit 502, configured to determine an IBLER target value of the UE according to the SINR average value and the SINR average difference value acquired by the acquiring unit 501;

Optionally, for the MCS selection to be more accurate, the moving speed of the UE may also be considered when determining the IBLER target value, that is, the acquiring unit 501 is further configured to acquire the moving speed of the UE, and the determining unit 502 is configured according to the moving speed of the UE. The SINR average value of the UE and the SINR average difference value of the UE determine an IBLER target value of the UE.

The obtaining unit 501 is further configured to acquire an IBLER measurement value of the UE in the current TTI;

The adjusting unit 503 is configured to adjust the SINR filtering value of the UE according to the IBLER measurement value acquired by the acquiring unit 501 and the IBLER target value determined by the determining unit 502, and obtain the SINR final value of the UE;

The selecting unit 504 is configured to select a modulation and coding mode MCS for the UE according to the SINR final value acquired by the adjusting unit 503.

The embodiment of the present invention provides a base station, where the determining unit 502 determines the IBLER target value of the UE according to the SINR average value and the SINR average difference value acquired by the obtaining unit 501, and the IBLER measurement value obtained by the adjusting unit 501 according to the obtaining unit 501 is determined. The IBLER target value determined by the unit 502 adjusts the SINR filtering value of the UE to obtain the SINR final value of the UE, and is selected by the selecting unit 504 according to The final value of the SINR is the MCS selected for the UE. Since the SINR average value and the SINR average difference value can reflect the actual channel quality fluctuation situation, the MCS selection method using the fixed IBLER target value of other base stations can improve the spectrum efficiency of the UE, thereby improving the throughput rate of the UE.

Preferably, the determining unit 502 is specifically configured to:

When the SINR average difference value acquired by the acquiring unit 501 is greater than the upper threshold of the SINR fluctuation, determining that the first target value is the IBLER target value of the UE; or

When the SINR average difference value acquired by the acquiring unit 501 is less than the upper threshold of the SINR fluctuation, determining that the second target value is an IBLER target value of the UE, the first target value is greater than the second target value.

Preferably, the acquiring unit 501 is further configured to: acquire a moving speed of the UE;

The determining unit 502 is specifically configured to: determine an IBLER target value of the UE according to the moving speed, the SINR average value, and the SINR average difference value.

Preferably, the determining unit 502 is specifically configured to:

Determining that the first target value is an IBLER target value of the UE when the SINR average difference value is greater than an upper threshold of the SINR fluctuation; or

When the SINR average value is less than the average SINR lower threshold, when the SINR average difference value is smaller than the SINR fluctuation upper threshold, and the moving speed is greater than the speed threshold, determining that the first target value is the IBLER target value of the UE; or

When the SINR average value is less than the average SINR lower threshold, the SINR average difference value is less than the SINR fluctuation upper threshold, and the moving speed is less than the speed threshold, determining that the second target value is the IBLER target value of the UE; or

When the SINR average value is greater than the average SINR lower threshold than the average SINR upper threshold, and the SINR average difference value is less than the SINR fluctuation upper threshold, determining that the second target value is the IBLER target value of the UE; or

When the SINR average value is greater than the average SINR upper threshold, and the SINR average difference value is greater than the SINR fluctuation lower threshold than the SINR fluctuation upper threshold, determining that the second target value is the IBLER of the UE Target value; or,

When the SINR average value is greater than an average SINR upper threshold, the SINR average difference value is less than a SINR fluctuation lower threshold, and the moving speed is greater than a speed threshold, determining that the third target value is an IBLER target value of the UE; or ,

When the SINR average value is greater than the average SINR upper threshold, the SINR average difference value is less than the SINR fluctuation lower threshold, and the moving speed is less than the speed threshold, determining that the second target value is the IBLER target value of the UE, The first target value is greater than the second target value is greater than the third target value.

Preferably, the adjusting unit 503 is specifically configured to:

When the IBLER measurement value acquired by the acquiring unit 501 is smaller than the IBLER target value determined by the determining unit 502, the SINR filtering value is adjusted upward by the first adjustment amount to obtain the final SINR value of the UE; or

When the IBLER measurement value acquired by the acquiring unit 501 is greater than the IBLER target value determined by the determining unit 502, the SINR filtering value is down-regulated by the second adjustment amount to obtain the SINR final value of the UE.

Preferably, the acquiring unit 501 is specifically configured to: when the UE is a Full Buffer UE, acquire an SINR average value and an SINR average difference value of the UE in the statistical period.

Preferably, the base station further includes:

a detecting unit, configured to detect whether the UE meets the first condition and the second condition, where the first condition is that a ratio of a resource required by the UE to a system bandwidth is greater than a first proportional threshold, and the second condition is The ratio of the number of times the UE obtains the scheduling to the total number of scheduling times is greater than the second ratio threshold; when the UE meets the first condition and the second condition, the UE is confirmed to be a Full Buffer UE.

FIG. 6 is a schematic structural diagram of another base station according to Embodiment 3 of the present invention. The base station is configured to perform a method for selecting an MCS according to Embodiment 1 of the present invention. Referring to FIG. 6, the base station includes:

Memory 601;

The processor 602;

The memory 601 is used to store instructions or codes, and the processor 602 is used to call the fingers of the memory 601. Order or code, perform the following processing:

Obtaining an average SINR value and a SINR average difference value of the UE in the statistical period, where the statistical period includes N TTIs before the current TTI, where N>1;

Determining an IBLER target value of the UE according to the SINR average value and the SINR average difference value;

Obtaining an IBLER measurement value of the UE in the current TTI;

And adjusting an SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value, and acquiring a final SINR value of the UE;

The MCS is selected for the UE according to the SINR final value.

Preferably, the processor 602 may obtain the SINR measurement value of the UE in each TTI of the N TTIs, and obtain the SINR average value and the SINR average difference value of the UE in the statistical period according to the N SINR measurement values.

The processor 602 can obtain the above SINR measurement value by two methods: direct measurement or indirect measurement. Optionally, the base station further includes a transceiver, when the UE adopts the direct measurement mode, the UE sends the SRS or the DMRS to the base station by using the transceiver, and the processor 602 obtains the SINR measurement value of the UE by measuring the SRS or the DMRS; The UE transmits the PHR and the RSRP to the base station through the transceiver, and the processor 602 estimates the SINR measurement value of the UE according to the PHR and the RSRP.

Preferably, the instruction or code stored in the memory 601 is operable to cause the processor 602 to perform the determining an IBLER target value of the UE according to the SINR average value and the SINR average difference value:

Determining that the first target value is an IBLER target value of the UE when the SINR average difference value is greater than an upper threshold of the SINR fluctuation; or

When the SINR average difference value is less than the upper threshold of the SINR fluctuation, determining that the second target value is an IBLER target value of the UE, the first target value is greater than the second target value.

Preferably, the processor 602 is further configured to perform the following operations according to the instructions or code stored in the memory 601:

Obtaining a moving speed of the UE;

An instruction or code stored in the memory 601 that is operable to cause the processor 602 to perform determining the IBLER target value of the UE based on the SINR average and the SINR average difference value is:

The IBLER target value of the UE is determined according to the moving speed, the SINR average value, and the SINR average difference value.

A person skilled in the art should further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be performed by a program, and the program may be stored in a computer readable storage medium, which is non-transitory ( English: non-transitory) media, such as random access memory, read-only memory, flash memory, hard disk, solid state disk, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), CD (English: optical disc) And any combination thereof.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims (15)

A method for selecting a modulation and coding method, the method comprising: Obtaining a signal and interference plus noise ratio SINR average value and an SINR average difference value of the user equipment UE in the statistical period, where the statistical period includes N TTIs before the current transmission time interval TTI, where N>1; Determining an initial block error rate IBLER target value of the UE according to the SINR average value and the SINR average difference value; Obtaining an IBLER measurement value of the UE in the current TTI; And adjusting an SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value, and acquiring a final SINR value of the UE; A modulation coding mode MCS is selected for the UE according to the SINR final value. The method according to claim 1, wherein the determining an IBLER target value of the UE according to the SINR average value and the SINR average difference value comprises: Determining that the first target value is an IBLER target value of the UE when the SINR average difference value is greater than an upper threshold of the SINR fluctuation; or When the SINR average difference value is less than the upper threshold of the SINR fluctuation, determining that the second target value is an IBLER target value of the UE, the first target value is greater than the second target value. The method of claim 1 further comprising: Obtaining a moving speed of the UE; Determining, according to the SINR average value and the SINR average difference value, the IBLER target value of the UE, including: The IBLER target value of the UE is determined according to the moving speed, the SINR average value, and the SINR average difference value. The method according to claim 3, wherein the determining an IBLER target value of the UE according to the moving speed, the SINR average value, and the SINR average difference value comprises: When the SINR average difference value is greater than the upper threshold of the SINR fluctuation, determining the first target value is The IBLER target value of the UE; or, When the SINR average value is less than the average SINR lower threshold, when the SINR average difference value is smaller than the SINR fluctuation upper threshold, and the moving speed is greater than the speed threshold, determining that the first target value is the IBLER target value of the UE; or When the SINR average value is less than the average SINR lower threshold, the SINR average difference value is less than the SINR fluctuation upper threshold, and the moving speed is less than the speed threshold, determining that the second target value is the IBLER target value of the UE; or When the SINR average value is greater than the average SINR lower threshold than the average SINR upper threshold, and the SINR average difference value is less than the SINR fluctuation upper threshold, determining that the second target value is the IBLER target value of the UE; or When the SINR average value is greater than the average SINR upper threshold, and the SINR average difference value is greater than the SINR fluctuation lower threshold than the SINR fluctuation upper threshold, determining that the second target value is the IBLER target value of the UE; or When the SINR average value is greater than an average SINR upper threshold, the SINR average difference value is less than a SINR fluctuation lower threshold, and the moving speed is greater than a speed threshold, determining that the third target value is an IBLER target value of the UE; or , When the SINR average value is greater than the average SINR upper threshold, the SINR average difference value is less than the SINR fluctuation lower threshold, and the moving speed is less than the speed threshold, determining that the second target value is the IBLER target value of the UE, The first target value is greater than the second target value is greater than the third target value. The method according to any one of claims 1 to 4, wherein the SINR filtering value of the UE is adjusted according to the IBLER measurement value and the IBLER target value, and the SINR of the UE is finally obtained. Values, including: When the IBLER measurement value is smaller than the IBLER target value, the SINR filtering value is adjusted upward by a first adjustment amount to obtain a final value of the SINR of the UE; or When the IBLER measurement value is greater than the IBLER target value, the SINR filtered value is down-regulated by a second adjustment amount to obtain a final SINR value of the UE. The method according to any one of claims 1 to 5, wherein the acquiring the SINR average value and the SINR average difference value of the UE in the statistical period includes: When the UE is a full-load Ful l Buffer UE, the SINR average value and the SINR average difference value of the UE in the statistical period are obtained. The method according to claim 6, wherein the method further comprises: detecting whether the UE satisfies a first condition and a second condition, where the first condition is that the UE needs to transmit a required resource and a system bandwidth. The ratio is greater than the first proportional threshold, and the second condition is that the ratio of the number of times the UE obtains the scheduling to the total number of scheduling times is greater than the second proportional threshold; When the UE satisfies the first condition and the second condition, it is confirmed that the UE is a Ful l Buffer UE. A base station, the base station includes: An acquiring unit, configured to acquire a signal and interference plus noise ratio SINR average value and an SINR average difference value of the user equipment UE in the statistical period, where the statistical period includes N TTIs before the current transmission time interval TTI, where N>1; a determining unit, configured to determine an initial block error rate IBLER target value of the UE according to the SINR average value and the SINR average difference value acquired by the acquiring unit; The acquiring unit is further configured to acquire an IBLER measurement value of the current TTI UE; And an adjusting unit, configured to adjust an SINR filtering value of the UE according to an IBLER measurement value acquired by the acquiring unit and an IBLER target value determined by the determining unit, to obtain a final SINR value of the UE; And a selecting unit, configured to select a modulation and coding mode MCS for the UE according to the final value of the SINR obtained by the adjusting unit. The base station according to claim 8, wherein the determining unit is specifically configured to: When the SINR average difference value acquired by the acquiring unit is greater than the upper threshold of the SINR fluctuation, determining that the first target value is the IBLER target value of the UE; or Determining when the SINR average difference value obtained by the acquiring unit is less than the upper threshold of the SINR fluctuation The second target value is an IBLER target value of the UE, and the first target value is greater than the second target value. The base station according to claim 8, wherein the acquiring unit is further configured to: acquire a moving speed of the UE; The determining unit is specifically configured to: determine an IBLER target value of the UE according to the moving speed, the SINR average value, and the SINR average difference value. The base station according to claim 10, wherein the determining unit is specifically configured to: Determining that the first target value is an IBLER target value of the UE when the SINR average difference value is greater than an upper threshold of the SINR fluctuation; or When the SINR average value is less than the average SINR lower threshold, when the SINR average difference value is smaller than the SINR fluctuation upper threshold, and the moving speed is greater than the speed threshold, determining that the first target value is the IBLER target value of the UE; or When the SINR average value is less than the average SINR lower threshold, the SINR average difference value is less than the SINR fluctuation upper threshold, and the moving speed is less than the speed threshold, determining that the second target value is the IBLER target value of the UE; or When the SINR average value is greater than the average SINR lower threshold than the average SINR upper threshold, and the SINR average difference value is less than the SINR fluctuation upper threshold, determining that the second target value is the IBLER target value of the UE; or When the SINR average value is greater than the average SINR upper threshold, and the SINR average difference value is greater than the SINR fluctuation lower threshold than the SINR fluctuation upper threshold, determining that the second target value is the IBLER target value of the UE; or When the SINR average value is greater than an average SINR upper threshold, the SINR average difference value is less than a SINR fluctuation lower threshold, and the moving speed is greater than a speed threshold, determining that the third target value is an IBLER target value of the UE; or , When the SINR average value is greater than the average SINR upper threshold, the SINR average difference value is less than the SINR fluctuation lower threshold, and the moving speed is less than the speed threshold, determining that the second target value is the IBLER target value of the UE, The first target value is greater than the second target value is greater than the third target value. The base station according to any one of claims 8 to 11, wherein the adjusting unit is specifically configured to: And when the IBLER measurement value obtained by the acquiring unit is smaller than the IBLER target value determined by the determining unit, the SINR filtering value is adjusted upward by the first adjustment amount to obtain a final value of the SINR of the UE; or When the IBLER measurement value acquired by the acquiring unit is greater than the IBLER target value determined by the determining unit, the SINR filtering value is down-regulated by the second adjustment amount to obtain the SINR final value of the UE. The base station according to any one of claims 8 to 12, wherein the acquiring unit is specifically configured to: when the UE is a full-load Ful l Buffer UE, acquire the UE in the statistical period The SINR average and the SINR average difference value. The base station according to claim 13, wherein the base station further comprises: a detecting unit, configured to detect whether the UE meets the first condition and the second condition, where the first condition is that a ratio of a resource required by the UE to a system bandwidth is greater than a first proportional threshold, and the second condition is The ratio of the number of times the UE obtains the scheduling to the total number of scheduling times is greater than the second ratio threshold; when the UE satisfies the first condition and the second condition, the UE is confirmed to be a Ful l Buffer UE. A base station, the base station includes: Memory processor; The memory for storing instructions or code; The processor is configured to invoke the instruction or code stored by the memory, and perform the following processing: Obtaining a signal and interference plus noise ratio SINR average value and an SINR average difference value of the user equipment UE in the statistical period, where the statistical period includes N TTIs before the current transmission time interval TTI, where N>1; Determining an initial block error rate IBLER target value of the UE according to the SINR average value and the SINR average difference value; Obtaining an IBLER measurement value of the UE in the current TTI; And adjusting an SINR filtering value of the UE according to the IBLER measurement value and the IBLER target value, and acquiring a final SINR value of the UE; A modulation coding mode MCS is selected for the UE according to the SINR final value.

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