CN106817760A - Power distribution method and device - Google Patents

Abstract

The present invention discloses a power allocation method. The power allocation method includes: obtaining the uplink physical resource block PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of a user equipment UE on each component carrier; according to each Uplink transmission efficiency and its corresponding uplink PRB idle rate, determine the power allocation factor of the UE in each component carrier; determine and configure the UE in the The maximum transmit power of each component carrier. The invention also discloses a power distribution device. The present invention can solve the problem of degraded work performance caused by UE power reduction.

Description

Power distribution method and device

technical field

The present invention relates to the field of communication technology, in particular to a power allocation method and device.

Background technique

In the Long Term Evolution (LTE for short) communication system supporting multi-carrier, and the Long Term Evolution Advanced (LTE-Advanced for short, LTE-A) communication system, the user equipment (User Equipment, UE for short) is in CA (Carrier Aggregation, In the carrier aggregation) scenario, it will be instructed to perform uplink transmission on multiple CCs (Component Carriers, component carriers) at the same uplink subframe time. Since the total power of the UE is limited, in the CA scenario, the UE must When the sum of the transmit power calculated by the indicated power parameters exceeds the maximum transmit power of the terminal, this is especially true under the macro station models such as Massive MIMO due to the large coverage. At this time, the UE needs to reduce the transmission power of multiple CCs according to the channel according to the protocol, so that the sum of the transmission powers of multiple CCs does not exceed the maximum transmission power of the terminal. For example, LTE-A adopts a hierarchical power reduction scheme based on the channel type and the transmitted information. For example, when multiple PUSCHs are sent at the same time and the transmission power exceeds the maximum transmission power configured by the terminal, the transmission power of multiple PUSCHs is multiplied by the same The power reduction factor method is used to reduce the transmission power of multiple PUSCHs in proportion to ensure that the uplink transmission power will not exceed the maximum transmission power configured by the terminal; another example is that multiple PUSCHs and PUCCHs are sent at the same time and the transmission power exceeds the maximum transmission power configured by the terminal. In terms of power, first ensure the transmit power of the PUCCH, and then reduce the transmit power of multiple PUSCHs in proportion by multiplying the transmit power of multiple PUSCHs by the same power reduction factor to ensure that the uplink transmit power will not exceed the terminal configuration. Maximum transmit power. However, after the UE reduces the transmit power on each CC according to the channel according to the protocol, the scheduling results of each CC will no longer be suitable, the uplink packet error rate will increase, and the uplink transmission efficiency, SRS demodulation performance, downlink beamforming and space The performance of multiplexing will be seriously degraded.

Contents of the invention

The main purpose of the present invention is to provide a power allocation method and device, aiming at solving the problem of degraded work performance caused by UE power reduction.

In order to achieve the above object, the present invention provides a power allocation method, the power allocation method includes:

Obtain the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier;

determining a power allocation factor of the UE on each component carrier according to each uplink transmission efficiency and its corresponding uplink PRB idle rate;

Determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE.

Preferably, the obtaining the uplink transmission efficiency of the user equipment UE on each component carrier in the current detection period includes:

Measuring the SINR value of the UE on each component carrier, and receiving the power headroom report PHR on each component carrier reported by the UE;

According to each of the SINR measurement values and the PHR value carried by the corresponding PHR, determine the SINR value of the single PRB of the UE on each component carrier, and use the SINR value of each of the single PRB as the UE in each component carrier. The uplink transmission efficiency of the carrier.

Preferably, the step of determining the power allocation factor of the UE on each component carrier according to each uplink transmission efficiency and its corresponding uplink PRB idle rate includes:

calculating the product of each uplink transmission efficiency and its corresponding uplink PRB idle rate, and calculating the sum of each of the products;

The ratios of each of the products and the sum are respectively used as power allocation factors of the UE on each component carrier.

Preferably, before the step of determining and configuring the maximum transmit power of each component carrier for the UE according to each of the power allocation factors and the total transmit power of the UE, the method further includes:

Acquire and modify each of the power allocation factors according to the service type of the UE on each component carrier;

When the correction is completed, the step of determining and configuring the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE is performed.

Preferably, while receiving the PHR reported by the UE, the following steps are also performed:

Using the saved downlink path loss values of the UE on each component carrier, smoothing the current downlink path loss values of the UE derived from the corresponding PHR respectively;

The smoothed downlink path loss values are saved, and the detection period is adjusted according to the smoothed downlink path loss values.

Preferably, the power allocation method further includes:

The detection period is adjusted according to the uplink PRB idle rate of each component carrier in the current detection period.

In addition, in order to achieve the above object, the present invention also provides a power distribution device, the power distribution device includes:

An acquisition module, configured to acquire the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier;

A determining module, configured to determine a power allocation factor of the UE on each component carrier according to each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates;

A configuration module, configured to determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE.

Preferably, the acquisition module is also used to measure the SINR value of the UE on each component carrier, and receive the power headroom report PHR on each component carrier reported by the UE; and according to each The SINR measurement value and the PHR value carried by the corresponding PHR determine the SINR value of the single PRB of the UE on each component carrier, and use the SINR value of each single PRB as the uplink transmission of the UE on each component carrier efficiency.

Preferably, the determination module is further configured to calculate the product of each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates, and calculate the sum of each of the products; and calculate the ratio of each of the products to the sum are respectively used as power allocation factors of the UE on each component carrier.

Preferably, the power allocation device further includes a correction module, configured to obtain and correct each of the power allocation factors according to the service type of the UE on each component carrier;

The configuration module is further configured to determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE when the correction is completed.

Preferably, the power allocation device further includes a first adjustment module, configured to, when receiving the PHR reported by the UE, use the stored downlink path loss values of the UE on each component carrier to respectively correspond to the PHR smoothing the deduced current downlink path loss values of the UE; and saving the smoothed downlink path loss values, and adjusting the detection period according to the smoothed downlink path loss values.

Preferably, the power allocation device further includes a second adjustment module, configured to adjust the detection cycle according to the uplink PRB idle rate of each component carrier.

In the power allocation method or device proposed by the present invention, firstly, according to the uplink physical resource block PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier, determine the power allocation factor of the UE on each component carrier , and then according to each of the power allocation factors and the total transmit power of the UE, determine and configure the maximum transmit power on each component carrier for the UE, so that when the UE is scheduled between each component carrier, the maximum transmit power on each component carrier The total expected transmission power of the UE will not exceed its actual total transmission power, that is, there will be no power limitation, and power reduction is avoided. Therefore, the present invention can solve the problem of performance degradation caused by UE power reduction.

Description of drawings

FIG. 1 is a schematic flow chart of the first embodiment of the power allocation method of the present invention;

Fig. 2 is a schematic diagram of functional modules of the first embodiment of the power distribution device of the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The present invention provides a power allocation method. Referring to FIG. 1, in the first embodiment of the power allocation method of the present invention, the power allocation method includes:

Step S10, acquiring the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier;

The power allocation method provided in this embodiment can be applied to base stations in communication systems such as LTE (Long Term Evolution, Long Term Evolution) and LTE-A (LTE-Advanced, Advanced Long Term Evolution), for example, when applied to Massive MIMO, etc. For a CA (Carrier Aggregation, carrier aggregation) macro base station, the base station configures the uplink transmit power between component carriers for the UE (User Equipment, user equipment) in advance, so that when the UE is scheduled on multiple component carriers at the same time, the The transmission power of the carrier will not exceed the total transmission power, so as to avoid the problem that the UE performs power reduction to cause the degradation of the working performance.

In this embodiment, when power allocation is performed, firstly, the uplink PRB (Physical Resource Block, physical resource block, which is the basic unit of air interface physical resource allocation) idle rate of each component carrier in the current detection period and the user equipment UE's uplink transmission efficiency. Specifically, when obtaining the uplink transmission efficiency of the UE on each component carrier, calculate the SINR (Signal Interference Plus Noise Ratio, signal-to-interference-noise ratio) value of the UE converted to a single PRB on each component carrier, and calculate the UE The SINR value of a single PRB on each component carrier is respectively used as the uplink transmission efficiency of the UE on each component carrier.

Wherein, it should be noted that the SINR value refers to the ratio of the strength of the received useful signal to the strength of the received interference signal (noise and interference), which can be simply understood as a "signal-to-noise ratio". In actual engineering scenarios, especially in MIMO scenarios, it is unrealistic to estimate the channel matrix accurately and in time, and due to the limitation of the feedback channel, it is impossible to have too much feedback information. Therefore, in the proposal of 3GPP, SINR is usually used as feedback information for control parameters of adaptive modulation.

Specifically, SINR first appeared in multi-user detection, assuming that there are two users 1 and 2, and the two signals of the transmitting antenna (CDMA (Code Division Multiple Access, code division multiple access) adopt code orthogonality, OFDM (Orthogonal Frequency Division Multiplexing , Orthogonal Frequency Division Multiplexing) adopts spectrum orthogonality, which is used to distinguish different data sent to two users), user 1 receives the data sent to itself by the transmitting antenna, which is a useful signal Signal, and also receives The data sent by the transmitting antenna to user 2 is Interference and, of course, Noise.

When acquiring the uplink PRB idle rate of each component carrier, the calculation of the uplink PRB idle rate of the component carrier CC1 is used for illustration.

In this embodiment, the uplink PRB usage Ucc1 of CC1 and the available uplink PRB Tcc1 of CC1 are counted in the current detection period, and the ratio of (Tcc1-Ucc1) to Tcc1 is taken as the uplink PRB idle rate of CC1.

Step S20, determining the power allocation factor of the UE on each component carrier according to each uplink transmission efficiency and its corresponding uplink PRB idle rate;

In this embodiment, after obtaining the uplink PRB idle rate of each component carrier and the uplink transmission efficiency of the UE on each component carrier, according to each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates, it is determined that the UE is in each component carrier. The power allocation factor for the component carrier.

Specifically, calculate the product of each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates, and calculate the sum of each of the products; use the ratio of each of the products to the sum as the UE in each component The power allocation factor for the carrier.

For example, the base station includes a primary component carrier PCC, two secondary component carriers SCC1 and SCC2, and the base station obtains the uplink PRB idle rates of SCC1, SCC2 and PCC as ULPrbUsage(1), ULPrbUsage(2) and ULPrbUsage(3), and The acquired uplink transmission efficiencies of UE on SCC1, SCC2 and PCC are NormalizedUlSinr(1), NormalizedUlSinr(2) and NormalizedUlSinr(3) respectively;

Denote the power allocation factors of UE in SCC1, SCC2 and PCC as ScaleFactor(1), ScaleFactor(2) and ScaleFactor(3) respectively, then

ScaleFactor(1)=ULPrbUsage(1)*NormalizedUlSinr(1)/(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

ScaleFactor(2)=ULPrbUsage(2)*NormalizedUlSinr(2)/(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

ScaleFactor(3)=ULPrbUsage(3)*NormalizedUlSinr(3)/(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3)).

Step S30: Determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE.

After determining the power allocation factors of the UE on each component carrier, determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE.

For example, the total transmit power of the UE is Pmcax_Total, and the maximum transmit power of the UE in SCC1, SCC2, and PCC are respectively recorded as PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC(3), then

PmcaxOnCC(1) = Pmcax_Total*ScaleFactor(1);

PmcaxOnCC(2) = Pmcax_Total*ScaleFactor(2);

PmcaxOnCC(3)=Pmcax_Total*ScaleFactor(3).

In this embodiment, after determining the maximum transmit power PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC(3) of the UE on each component carrier, pass PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC(3) through RRC (Radio Resource Control, radio resource control) reconfiguration signaling is sent to the UE. After receiving the aforementioned reconfiguration signaling, the UE parses out the PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC(3) carried in the aforementioned reconfiguration signaling, and sets its maximum transmit power in SCC1, SCC2 and PCC to PmcaxOnCC( 1), PmcaxOnCC(2) and PmcaxOnCC(3).

The power allocation method proposed in this embodiment first determines the power allocation factor of the UE on each component carrier according to the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier, Then, according to each of the power allocation factors and the total transmit power of the UE, determine and configure the maximum transmit power on each component carrier for the UE, so that when the UE is scheduled between each component carrier, the maximum transmit power on each component carrier The total expected transmission power will not exceed its actual total transmission power, that is, there will be no power limitation, and power reduction is avoided. Therefore, the present invention can solve the problem of performance degradation caused by UE power reduction.

Further, based on the first embodiment, a second embodiment of the power allocation method of the present invention is proposed. In this embodiment, obtaining the uplink transmission efficiency of the user equipment UE on each component carrier in the current detection period in the above step S10 includes :

Measuring the SINR value of the UE on each component carrier, and receiving the power headroom report PHR on each component carrier reported by the UE;

According to each of the SINR measurement values and the PHR value carried by the corresponding PHR, determine the SINR value of the single PRB of the UE on each component carrier, and use the SINR value of each of the single PRB as the UE in each component carrier. The uplink transmission efficiency of the carrier.

In this embodiment, the SINR value of a single PRB is determined using the SINR measurement value and the PHR value. Specifically, firstly, the SINR value of the UE on each component carrier is measured, and the power of each component carrier reported by the UE is received. headroom report PHR; when the SINR measurement value of the UE on each component carrier is obtained, and the power headroom report PHR on each component carrier reported by the UE is received, according to each of the SINR measurement values and its corresponding The PHR value carried by the PHR determines the SINR value of a single PRB of the UE on each component carrier, and uses the SINR value of each single PRB as the uplink transmission efficiency of the UE on each component carrier. The following takes the acquisition of the uplink transmission efficiency of the UE on the component carrier SCC1 as an example for description.

Optionally, use the following formula to determine the SINR value (uplink transmission efficiency) of a single PRB of UE on SCC1

NormalizedUlSinr(1)=SINR1+ΔSINR1+δ1;

Among them, SINR1 represents the measured SINR measurement value of the UE in SCC1, including the adjustment amount of AMC (Adaptive Modulation and Coding, adaptive modulation and coding), ΔSINR1 represents the influence of bandwidth when measuring SINR1, and δ1 is the PHR value corresponding to SINR1 ,and

PmcaxOnCC(1) is the maximum transmission power of UE in SCC1, P _{P_PUSCH} is the expected transmission power of UE in SCC1, P _{P_PUSCH} (i)=10log10(M0)+P _{o_Pusch} +αPL1+ _ΔTF (i)+f(i) , M0 is the number of PRBs that the UE currently needs to send, P _{P_PUSCH} is the power parameter set by the base station, which is used to identify the expected power spectral density received by the UE, α is the smoothing factor, PL1 is the current downlink path loss value of the UE in SCC1, Δ _TF (i) is the adjustment value based on MCS when the power control parameter DeltaMCS_Enable is 1, it is 0 when DeltaMCS_Enable is 0, f(i) is the closed-loop power control parameter, and the value is 0 in the open-loop power control, i is PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) i-th frame.

Further, based on the first or second embodiment, a third embodiment of the power allocation method of the present invention is proposed. In this embodiment, before the above step S30, it also includes:

Acquiring and modifying each of the power allocation factors according to the service type of the UE on each component carrier, and performing step S30 when the modification is completed.

As we all know, the base station carries various services of the UE, such as VoIP voice service, web text service, audio and video service, etc. However, when the UE transmits these services, the service type of the UE is often transparent to the base station, that is, For the base station, it does not know the service type of the UE carried by it.

In this embodiment, in each detection period, the UE may push the service type information transmitted by the UE on each component carrier to the base station, or the base station obtains the service type information transmitted by the UE on each component carrier from the core network.

After the service type information of the UE on each component carrier is acquired, each power allocation factor is corrected according to the service type of the UE on each component carrier. It should be noted that, in this embodiment, corresponding priorities are preset for different service types, and corresponding correction amounts are assigned to different service types according to the priority level. For example, for VoIP voice services, web text services, and audio For video services, VoIP voice services have the highest priority, followed by audio and video services, and web text services have the lowest priority. To put it vividly, the modification of the power allocation factors in this embodiment is to increase the power allocation factor corresponding to the component carrier where the service with high priority is located, and correspondingly reduce the component carrier where the service with low priority is located. Corresponding power allocation factor.

Let’s take the example that currently the services transmitted by the UE on SCC1, SCC2 and PCC are VoIP voice service, webpage text service and audio and video service respectively:

After determining the power allocation factors of the UE on each component carrier according to the uplink transmission efficiencies and the corresponding uplink PRB idle rates, it is recognized that the services transmitted by the UE on SCC1, SCC2 and PCC are VoIP voice services, web pages, etc. Taking the text service and the audio and video service as examples, the corrections corresponding to the power allocation factors obtained according to the priority relationship of the aforementioned services are CorrtOnCC(1), CorrtOnCC(2) and CorrtOnCC(3), respectively, wherein,

CorrtOnCC(1)=+10%(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

CorrtOnCC(2)=-6%(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

CorrtOnCC(3)=-4%(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

Then the corrected power allocation factors are:

ScaleFactor(1)'=ScaleFactor(1)+CorrtOnCC(1);

ScaleFactor(2)'=ScaleFactor(2)+CorrtOnCC(2);

ScaleFactor(3)'=ScaleFactor(3)+CorrtOnCC(3);

In this embodiment, after the correction of each of the power allocation factors is completed, the maximum transmission power of the UE on each component carrier is allocated by using each of the revised power allocation factors, that is,

PmcaxOnCC(1)=Pmcax_Total*ScaleFactor(1)';

PmcaxOnCC(2)=Pmcax_Total*ScaleFactor(2)';

PmcaxOnCC(3)=Pmcax_Total*ScaleFactor(3)'.

The allocation strategy in this embodiment not only considers the uplink PRB idle rate of each component carrier and the transmission efficiency of the UE on each component carrier, but also considers the service type of the UE on each component carrier, which can improve the communication efficiency of the entire communication system.

Further, based on the second embodiment, a fourth embodiment of the power allocation method of the present invention is proposed. In this embodiment, while receiving the PHR reported by the UE, the following steps are also performed:

Using the saved downlink path loss values of the UE on each component carrier, smoothing the current downlink path loss values of the UE derived from the corresponding PHR respectively;

The smoothed downlink path loss values are saved, and the detection period is adjusted according to the smoothed downlink path loss values.

Those skilled in the art can understand that in actual engineering scenarios, wireless communication is affected by many factors and changes dynamically. If it is inconvenient to maintain the detection cycle of power allocation, this obviously does not meet the actual needs. Therefore, this The embodiment proposes an optional adjustment scheme of the detection period.

Specifically, when receiving the PHR reported by the UE, this embodiment not only obtains the PHR value carried by the PHR, but also derives the current downlink path loss value of the UE on each component carrier according to each PHR, and uses the stored The downlink path loss value of the UE on each component carrier is smoothed respectively for each current downlink path loss value corresponding to it, as shown in the following formula:

PLj=(1-α)*PLj+α*PLcurr(j);

Among them, PLj on the left side of the formula represents the smoothed downlink path loss value, PLj on the right side of the formula represents the saved downlink path loss value, PLcurr represents the current downlink path loss value, j represents different component carriers, and α represents the smoothing factor , the value range is [0,1]. For example, in this embodiment, α is set to 0.5.

After the smoothing process is completed, the smoothed PLj is judged,

Wherein, PLj _min and PLj _max respectively represent the small downlink path loss threshold and the large downlink path loss threshold for adjusting the detection period on the corresponding component carrier.

like If it is greater than zero, the detection period will be shortened, and the adjusted detection period cannot be less than the minimum detection period; if If equal to zero, the detection cycle is maintained; if If it is less than zero, the detection cycle will be extended, and the adjusted detection cycle cannot be greater than the maximum detection cycle.

It should be noted that the adjustment amount of the detection cycle and the minimum and maximum values of the detection cycle can be set according to actual needs. For example, in this embodiment, the adjustment amount is set to 5 seconds, that is, each time the detection cycle is adjusted, the time is extended or shortened. The detection period is 5 seconds.

In this embodiment, the detection period is adjusted accordingly according to the downlink path loss value reported by the UE, which can increase the stability of power allocation.

Further, based on the first or second embodiment, a fifth embodiment of the power allocation method of the present invention is proposed. In this embodiment, the power allocation method further includes:

The detection period is adjusted according to the uplink PRB idle rate of each component carrier in the current detection period.

In order to increase the stability of power allocation, this embodiment proposes another optional adjustment scheme of the detection period. Specifically, when the uplink PRB idle rates of each component carrier in the current detection period are obtained, this embodiment not only performs UE power allocation based on each of the uplink PRB idle rates (for details, refer to the foregoing embodiments, and details will not be repeated here. ), and also perform statistics on each of the uplink PRB idle rates, and judge whether to adjust the detection period according to the statistical results, as shown in the following formula:

Wherein, k represents a different component carrier, and RbUsagek _min and RbUsagek _max respectively represent the minimum PRB utilization rate and the maximum PRB utilization rate for adjusting the detection period on the corresponding component carrier.

like If it is greater than zero, the detection period will be shortened, and the adjusted detection period cannot be less than the minimum detection period; if If equal to zero, the detection cycle is maintained; if If it is less than zero, the detection cycle will be extended, and the adjusted detection cycle cannot be greater than the maximum detection cycle.

It should be noted that the adjustment amount of the detection cycle and the minimum and maximum values of the detection cycle can be set according to actual needs. For example, in this embodiment, the adjustment amount is set to 5 seconds, that is, each time the detection cycle is adjusted, the time is extended or shortened. The detection period is 5 seconds.

The present invention also provides a power distribution device. Referring to FIG. 2, in the first embodiment of the power distribution device of the present invention, the power distribution device includes:

The acquiring module 10 is configured to acquire the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier;

The power allocation device provided in this embodiment can be applied to base stations in communication systems such as LTE (Long Term Evolution, Long Term Evolution) and LTE-A (LTE-Advanced, Advanced Long Term Evolution), for example, when applied to Massive MIMO, etc. to enable For a CA (Carrier Aggregation, carrier aggregation) macro base station, the power allocation device is built into the base station to run, so that the base station configures the uplink transmit power between component carriers for UE (User Equipment, user equipment) in advance, so that UE simultaneously transmits power on multiple component carriers During upscheduling, the transmission power of multiple component carriers will not exceed the total transmission power, thereby avoiding the problem of performance degradation caused by UE power reduction.

In this embodiment, when power allocation is performed, the acquisition module 10 first acquires the uplink PRB (Physical Resource Block, physical resource block, which is the basic unit of air interface physical resource allocation) idle rate of each component carrier in the current detection period and the user equipment UE Uplink transmission efficiency on each component carrier. Specifically, when acquiring the uplink transmission efficiency of the UE on each component carrier, the acquiring module 10 calculates the SINR (Signal Interference Plus Noise Ratio, signal-to-interference-noise ratio) value of the UE converted to a single PRB on each component carrier, The SINR value of the single PRB of the UE on each component carrier is used as the uplink transmission efficiency of the UE on each component carrier.

Wherein, it should be noted that the SINR value refers to the ratio of the strength of the received useful signal to the strength of the received interference signal (noise and interference), which can be simply understood as a "signal-to-noise ratio". In actual engineering scenarios, especially in MIMO scenarios, it is unrealistic to estimate the channel matrix accurately and in time, and due to the limitation of the feedback channel, it is impossible to have too much feedback information. Therefore, in the proposal of 3GPP, SINR is usually used as feedback information for control parameters of adaptive modulation.

Specifically, SINR first appeared in multi-user detection, assuming that there are two users 1 and 2, and the two signals of the transmitting antenna (CDMA (Code Division Multiple Access, code division multiple access) adopt code orthogonality, OFDM (Orthogonal Frequency Division Multiplexing , Orthogonal Frequency Division Multiplexing) adopts spectrum orthogonality, which is used to distinguish different data sent to two users), user 1 receives the data sent to itself by the transmitting antenna, which is a useful signal Signal, and also receives The data sent by the transmitting antenna to user 2 is Interference and, of course, Noise.

When the acquiring module 10 acquires the uplink PRB idle rate of each component carrier, the calculation of the uplink PRB idle rate of the component carrier CC1 is used for illustration.

In this embodiment, the acquisition module 10 counts the number Ucc1 of the uplink PRB used by CC1 in the current detection period, and counts the number Tcc1 of the available uplink PRB of CC1, and uses the ratio of (Tcc1-Ucc1) to Tcc1 as the uplink PRB idle rate of CC1.

A determining module 20, configured to determine a power allocation factor of the UE on each component carrier according to each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates;

In this embodiment, after the acquisition module 10 acquires the uplink PRB idle rate of each component carrier and the uplink transmission efficiency of the UE on each component carrier, the determination module 20 determines according to each of the uplink transmission efficiency and its corresponding uplink PRB idle rate rate, and determine the power allocation factor of the UE on each component carrier.

Specifically, the determination module 20 calculates the product of each uplink transmission efficiency and its corresponding uplink PRB idle rate, and calculates the sum of each of the products, and uses the ratio of each of the products and the sum as the respective The power allocation factor of the UE on each component carrier.

For example, the base station includes a primary component carrier PCC, two secondary component carriers SCC1 and SCC2, and the obtaining module 10 obtains the uplink PRB idle rates of SCC1, SCC2 and PCC as ULPrbUsage(1), ULPrbUsage(2) and ULPrbUsage(3) , and the acquired uplink transmission efficiencies of UE on SCC1, SCC2 and PCC are NormalizedUlSinr(1), NormalizedUlSinr(2) and NormalizedUlSinr(3);

Denote the power allocation factors of UE in SCC1, SCC2 and PCC as ScaleFactor(1), ScaleFactor(2) and ScaleFactor(3) respectively, then

ScaleFactor(1)=ULPrbUsage(1)*NormalizedUlSinr(1)/(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

ScaleFactor(2)=ULPrbUsage(2)*NormalizedUlSinr(2)/(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

ScaleFactor(3)=ULPrbUsage(3)*NormalizedUlSinr(3)/(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3)).

The configuration module 30 is configured to determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE.

After the determination module 20 determines the power allocation factors of the UE in each component carrier, the configuration module 30 determines and configures the power allocation factors for the UE in each component carrier according to each of the power allocation factors and the total transmit power of the UE. The maximum transmit power of the carrier.

For example, the total transmit power of the UE is Pmcax_Total, and the maximum transmit power of the UE in SCC1, SCC2, and PCC are respectively recorded as PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC(3), then

PmcaxOnCC(1) = Pmcax_Total*ScaleFactor(1);

PmcaxOnCC(2) = Pmcax_Total*ScaleFactor(2);

PmcaxOnCC(3)=Pmcax_Total*ScaleFactor(3).

In this embodiment, after the configuration module 30 determines the maximum transmit power PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC(3) of the UE on each component carrier, it sets PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC (3) is sent to the UE through RRC (Radio Resource Control, radio resource control) reconfiguration signaling. After receiving the aforementioned reconfiguration signaling, the UE parses out the PmcaxOnCC(1), PmcaxOnCC(2) and PmcaxOnCC(3) carried in the aforementioned reconfiguration signaling, and sets its maximum transmit power in SCC1, SCC2 and PCC to PmcaxOnCC( 1), PmcaxOnCC(2) and PmcaxOnCC(3).

The power allocation device proposed in this embodiment first determines the power allocation factor of the UE on each component carrier according to the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier, Then, according to each of the power allocation factors and the total transmit power of the UE, determine and configure the maximum transmit power on each component carrier for the UE, so that when the UE is scheduled between each component carrier, the maximum transmit power on each component carrier The total expected transmission power will not exceed its actual total transmission power, that is, there will be no power limitation, and power reduction is avoided. Therefore, the present invention can solve the problem of performance degradation caused by UE power reduction.

Further, based on the first embodiment, a second embodiment of the power allocation device of the present invention is proposed. In this embodiment, the acquisition module 10 is also used to measure the SINR value of the UE on each component carrier , and receive the power headroom report PHR on each component carrier reported by the UE; and determine the single PRB of the UE on each component carrier according to each of the SINR measurement values and the PHR value carried by the corresponding PHR SINR value, and use the SINR value of each single PRB as the uplink transmission efficiency of the UE on each component carrier.

In this embodiment, the acquisition module 10 uses the SINR measurement value and the PHR value to determine the SINR value of a single PRB. Specifically, the acquisition module 10 first measures the SINR value of the UE on each component carrier, and receives the The power headroom report PHR reported by the UE on each component carrier; when the SINR measurement value of the UE on each component carrier is obtained, and the power headroom report PHR on each component carrier reported by the UE is received, The acquisition module 10 determines the SINR value of a single PRB of the UE on each component carrier according to each measured SINR value and the PHR value carried by the corresponding PHR, and uses the SINR value of each single PRB as the The uplink transmission efficiency of the UE on each component carrier. Hereinafter, the acquisition module 10 acquires the uplink transmission efficiency of the UE on the component carrier SCC1 as an example for description.

Optionally, use the following formula to determine the SINR value (uplink transmission efficiency) of a single PRB of UE on SCC1

NormalizedUlSinr(1)=SINR1+ΔSINR1+δ1;

Among them, SINR1 represents the measured SINR measurement value of UE in SCC1, including the adjustment amount of AMC (Adaptive Modulation and Coding, adaptive modulation and coding), ΔSINR1 represents the influence of bandwidth when measuring SINR1, and δ1 is the PHR value corresponding to SINR1 ,and

PmcaxOnCC(1) is the maximum transmission power of UE in SCC1, P _{P_PUSCH} is the expected transmission power of UE in SCC1, P _{P_PUSCH} (i)=10log10(M0)+P _{o_Pusch} +αPL1+ _ΔTF (i)+f(i) , M0 is the number of PRBs that the UE currently needs to send, P _{P_PUSCH} is the power parameter set by the base station, which is used to identify the expected power spectral density received by the UE, α is the smoothing factor, PL1 is the current downlink path loss value of the UE in SCC1, Δ _TF (i) is the adjustment value based on MCS when the power control parameter DeltaMCS_Enable is 1, it is 0 when DeltaMCS_Enable is 0, f(i) is the closed-loop power control parameter, and the value is 0 in the open-loop power control, i is PUSCH (Physical UplinkShared Channel, Physical Uplink Shared Channel) i-th frame.

Further, based on the first or second embodiment, a third embodiment of the power allocation device of the present invention is proposed. In this embodiment, the power allocation device further includes a correction module, configured to obtain and use The service type of the component carrier modifies each of the power allocation factors;

The configuration module is further configured to determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE when the correction is completed.

As we all know, the base station carries various services of the UE, such as VoIP voice service, web text service, audio and video service, etc. However, when the UE transmits these services, the service type of the UE is often transparent to the base station, that is, For the base station, it does not know the service type of the UE carried by it.

In this embodiment, in each detection cycle, the UE may push the service type information transmitted by the UE on each component carrier to the base station (correction module), or the correction module obtains the service transmitted by the UE on each component carrier from the core network type information.

After acquiring the service type information of the UE on each component carrier, the correction module corrects each of the power allocation factors according to the service type of the UE on each component carrier. It should be noted that, in this embodiment, corresponding priorities are preset for different service types, and corresponding correction amounts are assigned to different service types according to the priority level. For example, for VoIP voice services, web text services, and audio For video services, VoIP voice services have the highest priority, followed by audio and video services, and web text services have the lowest priority. To put it vividly, the correction module corrects each of the power allocation factors by increasing the power allocation factor corresponding to the component carrier where the service with high priority is located, and correspondingly reducing the power allocation factor corresponding to the component carrier where the service with low priority is located. power allocation factor.

Let’s take the example that currently the services transmitted by the UE on SCC1, SCC2 and PCC are VoIP voice service, webpage text service and audio and video service respectively:

After the determination module 20 determines the power allocation factor of the UE on each component carrier according to each uplink transmission efficiency and its corresponding uplink PRB idle rate, the correction module identifies the services transmitted by the UE on SCC1, SCC2 and PCC Taking VoIP voice service, webpage text service and audio-video service as examples respectively, the corrections corresponding to each of the power allocation factors obtained according to the priority relationship of the aforementioned services are CorrtOnCC(1), CorrtOnCC(2) and CorrtOnCC(3) respectively. ),in,

CorrtOnCC(1)=+10%(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

CorrtOnCC(2)=-6%(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

CorrtOnCC(3)=-4%(ULPrbUsage(1)*NormalizedUlSinr(1)+ULPrbUsage(2)*NormalizedUlSinr(2)+ULPrbUsage(3)*NormalizedUlSinr(3));

Then the corrected power allocation factors are:

ScaleFactor(1)'=ScaleFactor(1)+CorrtOnCC(1);

ScaleFactor(2)'=ScaleFactor(2)+CorrtOnCC(2);

ScaleFactor(3)'=ScaleFactor(3)+CorrtOnCC(3);

In this embodiment, after the correction module finishes correcting the power allocation factors, the configuration module 30 uses the corrected power allocation factors to allocate the maximum transmit power of the UE on each component carrier, namely

PmcaxOnCC(1)=Pmcax_Total*ScaleFactor(1)';

PmcaxOnCC(2)=Pmcax_Total*ScaleFactor(2)';

PmcaxOnCC(3)=Pmcax_Total*ScaleFactor(3)'.

The allocation strategy in this embodiment not only considers the uplink PRB idle rate of each component carrier and the transmission efficiency of the UE on each component carrier, but also considers the service type of the UE on each component carrier, which can improve the communication efficiency of the entire communication system.

Further, based on the second embodiment, a fourth embodiment of the power allocation device of the present invention is proposed. In this embodiment, the power allocation device further includes a first adjustment module, configured to receive the PHR reported by the UE At the same time, using the saved downlink path loss values of the UE in each component carrier, respectively perform smoothing processing on the current downlink path loss values of the UE derived from the corresponding PHR; and save the smoothed downlink path loss values value, and adjust the detection period according to each smoothed downlink path loss value.

Those skilled in the art can understand that in actual engineering scenarios, wireless communication is affected by many factors and changes dynamically. If it is inconvenient to maintain the detection cycle of power allocation, this obviously does not meet the actual needs. Therefore, this The embodiment proposes an optional adjustment scheme of the detection period.

Specifically, when receiving the PHR reported by the UE, not only the determination module 10 obtains the PHR value carried by the PHR, but the first adjustment module also derives the current downlink path loss value of the UE on each component carrier according to each PHR , and use the saved downlink path loss values of the UE on each component carrier to perform smoothing processing on the corresponding current downlink path loss values, as shown in the following formula:

PLj=(1-α)*PLj+α*PLcurr(j);

Among them, PLj on the left side of the formula represents the smoothed downlink path loss value, PLj on the right side of the formula represents the saved downlink path loss value, PLcurr represents the current downlink path loss value, j represents different component carriers, and α represents the smoothing factor , the value range is [0,1]. For example, in this embodiment, α is set to 0.5.

After the smoothing process is completed, the first adjustment module judges the smoothed PLj,

Wherein, PLj _min and PLj _max respectively represent the small downlink path loss threshold and the large downlink path loss threshold for adjusting the detection period on the corresponding component carrier.

like greater than zero, the first adjustment module shortens the detection period, and the adjusted detection period cannot be less than the minimum detection period; if Equal to zero, then the first adjustment module keeps the detection period; if If it is less than zero, the first adjustment module prolongs the detection period, and the adjusted detection period cannot be greater than the maximum detection period.

It should be noted that the adjustment amount of the detection cycle and the minimum and maximum values of the detection cycle can be set according to actual needs. For example, in this embodiment, the adjustment amount is set to 5 seconds, that is, every time the first adjustment module adjusts the detection cycle , prolong or shorten the detection period by 5 seconds.

In this embodiment, the detection period is adjusted accordingly according to the downlink path loss value reported by the UE, which can increase the stability of power allocation.

Furthermore, based on the first or second embodiment, a fifth embodiment of the power distribution device of the present invention is proposed. In this embodiment, the power distribution device further includes a second adjustment module, configured to The uplink PRB idle rate of the component carrier adjusts the detection period.

In order to increase the stability of power allocation, this embodiment proposes another optional adjustment scheme of the detection period. Specifically, when the uplink PRB idle rates of each component carrier in the current detection period are obtained, this embodiment not only performs UE power allocation based on each of the uplink PRB idle rates (for details, refer to the foregoing embodiments, and details will not be repeated here. ), and also perform statistics on each of the uplink PRB idle rates, and judge whether to adjust the detection period according to the statistical results, as shown in the following formula:

Wherein, k represents a different component carrier, and RbUsagek _min and RbUsagek _max respectively represent the minimum PRB utilization rate and maximum PRB utilization rate of the UE for adjusting the detection cycle on the corresponding component carrier.

like If it is greater than zero, the second adjustment module shortens the detection period, and the adjusted detection period cannot be less than the minimum detection period; if Equal to zero, then the second adjustment module keeps the detection cycle; if If it is less than zero, the second adjustment module prolongs the detection period, and the adjusted detection period cannot be greater than the maximum detection period.

It should be noted that the adjustment amount of the detection cycle and the minimum and maximum values of the detection cycle can be set according to actual needs. For example, in this embodiment, the adjustment amount is set to 5 seconds, that is, every time the second adjustment module adjusts the detection cycle , prolong or shorten the detection period by 5 seconds.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (12)

1. A power distribution method, characterized in that, the power distribution method comprises: Obtain the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier; determining a power allocation factor of the UE on each component carrier according to each uplink transmission efficiency and its corresponding uplink PRB idle rate; Determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE. 2. The power allocation method according to claim 1, wherein the obtaining the uplink transmission efficiency of the user equipment UE in each component carrier in the current detection period comprises: Measuring the SINR value of the UE on each component carrier, and receiving the power headroom report PHR on each component carrier reported by the UE; According to each of the SINR measurement values and the PHR value carried by the corresponding PHR, determine the SINR value of the single PRB of the UE on each component carrier, and use the SINR value of each of the single PRB as the UE in each component carrier. The uplink transmission efficiency of the carrier. 3. The power allocation method according to claim 1 or 2, wherein, according to each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates, determine the power allocation factor of the UE on each component carrier Steps include: calculating the product of each uplink transmission efficiency and its corresponding uplink PRB idle rate, and calculating the sum of each of the products; The ratios of each of the products and the sum are respectively used as power allocation factors of the UE on each component carrier. 4. The power allocation method according to claim 1 or 2, wherein, according to each of the power allocation factors and the total transmit power of the UE, determine and configure the UE on each component carrier Before the step of maximum transmit power, also include: Acquire and modify each of the power allocation factors according to the service type of the UE on each component carrier; When the correction is completed, the step of determining and configuring the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE is performed. 5. The power allocation method according to claim 2, wherein, while receiving the PHR reported by the UE, the following steps are also performed: Using the saved downlink path loss values of the UE on each component carrier, smoothing the current downlink path loss values of the UE derived from the corresponding PHR respectively; The smoothed downlink path loss values are saved, and the detection period is adjusted according to the smoothed downlink path loss values. 6. The power distribution method according to claim 1 or 2, wherein the power distribution method further comprises: The detection period is adjusted according to the uplink PRB idle rate of each component carrier in the current detection period. 7. A power distribution device, characterized in that the power distribution device comprises: An acquisition module, configured to acquire the uplink PRB idle rate of each component carrier in the current detection period and the uplink transmission efficiency of the user equipment UE on each component carrier; A determining module, configured to determine a power allocation factor of the UE on each component carrier according to each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates; A configuration module, configured to determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE. 8. The power allocation device according to claim 7, wherein the acquisition module is also used to measure the signal-to-interference-noise ratio (SINR) value of the UE on each component carrier, and receive the UE's reported signal-to-interference-noise ratio (SINR) value on each component carrier. The power headroom report PHR of the component carrier; and according to each of the SINR measurement values and the PHR value carried by the corresponding PHR, determine the SINR value of the single PRB of the UE on each component carrier, and send the SINR value of each single PRB The SINR values are respectively used as the uplink transmission efficiency of the UE on each component carrier. 9. The power allocation device according to claim 7 or 8, wherein the determining module is further configured to calculate the product of each of the uplink transmission efficiencies and their corresponding uplink PRB idle rates, and calculate the product of each of the products and a sum value; and using a ratio of each of the products and the sum value as a power allocation factor of the UE on each component carrier. 10. The power allocation device according to claim 7 or 8, characterized in that, the power allocation device further comprises a correction module, configured to obtain and allocate the power to each component carrier according to the service type of the UE on each component carrier The factor is corrected; The configuration module is further configured to determine and configure the UE's maximum transmit power on each component carrier according to each of the power allocation factors and the total transmit power of the UE when the correction is completed. 11. The power allocation device according to claim 8, wherein the power allocation device further comprises a first adjustment module, configured to use the saved PHR of the UE in each For the downlink path loss values of the component carriers, respectively perform smoothing processing on the current downlink path loss values of the UE derived from the corresponding PHRs; and store the smoothed downlink path loss values, and The line loss value adjusts the detection period. 12. The power allocation device according to claim 7 or 8, further comprising a second adjustment module, configured to adjust the detection cycle according to the uplink PRB idle rate of each component carrier.