CN102958148B - A kind of user equipment transmitting power control method and device - Google Patents
A kind of user equipment transmitting power control method and device Download PDFInfo
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Abstract
The invention discloses a kind of user equipment transmitting power control method and device.Including：UE receives the downlink channel signals from base station, and the downlink channel signals received are parsed；Uplink channel signals are generated according to the downlink channel signals after parsing, and calculate uplink transmission power；According to the power increment in downlink channel signals, uplink transmission power, up channel data-signal and DMRS generating process, up channel data-signal and DMRS calibration of power value are determined respectively；Calibration of power value, DMRS calibration of power value, preset hardware power control parameters and Base-Band Processing characterisitic parameter according to up channel data-signal, first carry out the calibration of power of up channel data-signal and the DMRS calibration of power, then the calibration of power of unified progress up channel data-signal and the DMRS calibration of power in hardware power control flow respectively in Base-Band Processing flow.The present invention can be accurately to UE transmission power be controlled.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for controlling transmit power of a user equipment.
Background
In order to ensure the data rate of User Equipment (UE) and reduce the interference of the User to other users, a Long Term Evolution (LTE) system and an Evolution system thereof strictly limit the uplink transmission power of the User UE.
Because the bandwidth allocated to the UE for uplink transmission is variable in the unit scheduling time, in the baseband processing process, if the same processing flow is adopted in different bandwidth configurations, the accuracy loss in signal baseband signal processing is large; in the baseband processing process, if different processing flows are adopted during different bandwidth configurations, the transmit power of the uplink subframe of the UE will be greatly different due to different configured bandwidths. In addition, the processing procedure of the data part of the Physical Uplink Shared Channel (PUSCH) in the LTE system is different from the processing procedure of the DeModulation Reference Signal (DMRS), and if the PUSCH data and the DeModulation Reference Signal are not transmitted according to the same power level, when the base station uses the Channel impulse response obtained according to the DeModulation Reference Signal for detecting the PUSCH data Signal, the performance of the base station receiver will be seriously affected; if the power control is performed on the PUSCH data and the demodulation reference signal respectively, the processing complexity, accuracy, and power consumption of the UE hardware will be greatly increased.
From the above analysis, if the uplink transmission power of the UE in the LTE system is not calibrated, the transmission power of the UE will generate a significant deviation, which results in a reduction in the performance of the entire system; if the uplink transmission power of the UE in the LTE system is improperly controlled, the hardware processing cost of the UE will be greatly increased.
A method and apparatus for transmit power calibration in a frequency division multiplexed wireless system is proposed in patent document No. 200880103688.9, which proposes that the transmit power needs to be calibrated according to different bandwidth configurations of the UE.
However, this document in the prior art only proposes a concept of calibrating the transmission power from the control flow, and does not effectively eliminate the influence of the power increment introduced in the baseband signal processing process, nor adjust the data signal and the demodulation reference signal in one subframe to the same power level, so that the processing according to the prior art scheme will inevitably cause a deviation between the actual power transmitted by the UE and the power expected by the base station to be transmitted by the UE.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling the transmitting power of user equipment, which can accurately control the transmitting power of UE.
The method for controlling the transmitting power of the user equipment provided by the embodiment of the invention comprises the following steps:
user Equipment (UE) receives a downlink channel signal from a base station and analyzes the received downlink channel signal; the UE generates an uplink channel signal according to the analyzed downlink channel signal and calculates uplink transmitting power, wherein the uplink channel signal comprises an uplink channel data signal and a demodulation reference signal DMRS; the UE respectively determines a power calibration value of the uplink channel data signal and a power calibration value of the DMRS according to the downlink channel signal, the uplink transmitting power, the power increment in the uplink channel data signal generating process and the power increment in the DMRS generating process; and the UE firstly respectively carries out power calibration of the uplink channel data signal and power calibration of the DMRS in the baseband processing flow according to the power calibration value of the uplink channel data signal, the power calibration value of the DMRS, a preset hardware power control parameter and a baseband processing characteristic parameter, and then carries out power calibration of the uplink channel data signal and power calibration of the DMRS in a unified manner in the hardware power control flow.
Optionally, the power-calibrated uplink channel data signal and demodulation reference signal have a power level with zero error within a subframe.
Optionally, the uplink channel is one or a combination of several of a physical uplink shared channel PUSCH, a physical uplink control channel PUCCH, a physical random access channel PRACH, and a sounding reference signal channel SRS.
Optionally, the downlink channel signal includes power control related information and uplink grant information related to transmitting an uplink channel signal.
Optionally, the uplink grant information includes resource allocation information, a modulation and coding scheme, HARQ information, TPC (transmit power control), and CQI (channel quality indicator).
Optionally, the determining, by the UE, the power calibration value of the uplink channel data signal and the power calibration value of the DMRS according to the downlink channel signal, the uplink transmission power, the power increment in the uplink channel data signal generation process, and the power increment in the DMRS generation process by the UE respectively includes:
the UE determines a corresponding relation between a power calibration value under the reference bandwidth configuration and uplink transmitting power required by a system to the UE under the reference bandwidth configuration;
the UE determines the current bandwidth configuration according to the uplink authorization information in the downlink channel signal;
the UE determines the difference value of the power increment introduced in the baseband signal processing process relative to the power increment introduced in the reference bandwidth configuration;
and the UE respectively determines the power calibration values of the uplink channel data signal and the DMRS under the current bandwidth configuration according to the uplink transmission power, the corresponding relation, and the difference value of the power increment introduced in the processing process of the uplink channel data signal and the DMRS under the current bandwidth configuration relative to the power increment introduced in the processing process of the reference bandwidth configuration.
Optionally, the difference between the power increment introduced in the processing process of the uplink channel data signal and the demodulation reference signal under the current bandwidth configuration and the power increment introduced in the processing process of the baseband signal under the reference bandwidth configuration is obtained through real-time calculation or through a table.
The user equipment transmitting power control device provided by the embodiment of the invention comprises:
a receiving unit, configured to receive a downlink channel signal from a base station, and analyze the received downlink channel signal; a generating unit, configured to generate an uplink channel signal according to the analyzed downlink channel signal, where the uplink channel signal includes an uplink channel data signal and a demodulation reference signal DMRS; the power calculation unit is used for calculating uplink transmitting power according to the analyzed downlink channel signal; the calibration value calculation unit is used for respectively determining the power calibration value of the uplink channel data signal and the power calibration value of the DMRS according to the downlink channel signal, the uplink transmitting power, the power increment in the uplink channel data signal generation process and the power increment in the DMRS generation process; and the power calibration unit is used for respectively calibrating the power of the uplink channel data signal and the power of the DMRS in the baseband processing flow according to the power calibration value of the uplink channel data signal, the power calibration value of the DMRS, a preset hardware power control parameter and a baseband processing characteristic parameter, and then uniformly calibrating the power of the uplink channel data signal and the power of the DMRS in the hardware power control flow.
Optionally, the power calibration unit performs power calibration on the uplink channel data signal and the demodulation reference signal, and the uplink channel data signal and the demodulation reference signal have a power level with zero error in a subframe.
Optionally, the calibration value calculation unit includes:
a corresponding relation determining module, configured to determine a corresponding relation between a power calibration value under the reference bandwidth configuration and uplink transmit power of the UE required by the system under the reference bandwidth configuration;
the bandwidth configuration determining module is used for determining the current bandwidth configuration according to the uplink authorization information in the downlink channel signal;
a difference value calculating module, configured to determine, according to the current bandwidth configuration, a difference value between a power increment introduced in the baseband signal processing process and a power increment introduced in the baseband signal processing process when the reference bandwidth configuration is performed;
and the calibration value calculation module is used for respectively determining the power calibration values of the uplink channel data signal and the DMRS under the current bandwidth configuration according to the difference value of the uplink transmission power, the corresponding relation, the uplink channel data signal under the current bandwidth configuration and the power increment introduced in the DMRS processing process relative to the power increment introduced in the base band signal processing process under the reference bandwidth configuration.
According to the technical scheme, the embodiment of the invention has the following advantages:
in the embodiment of the invention, the UE does not consider the change of signal power in the baseband signal processing process of the uplink channel data signal and the DMRS, thereby ensuring the accuracy of baseband processing to the maximum extent;
secondly, the power of the uplink channel data signal and the DMRS is adjusted to the same power level after the power of the baseband part is adjusted, so that the performance of the base station for channel estimation and data signal detection by utilizing the DMRS can be effectively ensured;
thirdly, the UE combines a downlink channel signal, uplink transmitting power, a power increment in the generation process of the uplink channel data signal and a power increment in the generation process of the demodulation reference signal of the base station to respectively determine a power calibration value of the uplink channel data signal and a power calibration value of the demodulation reference signal, and accurately controls the uplink transmitting power of the UE by calibrating the power of the uplink channel data signal and the power of the demodulation reference signal, so that the accuracy of a baseband signal of the UE is effectively ensured, and the processing complexity of hardware is low while the transmitting power meets the preset transmitting power;
furthermore, in the embodiment of the present invention, when configuring different bandwidths, power variation is not considered in the baseband signal processing process, and the power calibration value calculation module compensates the power increment in the baseband signal processing process, which effectively ensures the accuracy of the baseband signal and does not increase the complexity of the power calibration module.
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Fig. 1 is a schematic diagram of an embodiment of a method for controlling the transmission power of a ue according to the present invention;
FIG. 2 is a diagram of another embodiment of a method for controlling transmission power of UE according to the present invention;
fig. 3 is a schematic diagram of an embodiment of a user equipment transmit power control apparatus according to the present invention.
Detailed Description
The embodiment of the invention provides a method and a device for controlling the transmitting power of user equipment, which can accurately control the transmitting power of UE.
Referring to fig. 1, an embodiment of a method for controlling transmit power of a ue according to the present invention includes:
101. the UE receives a downlink channel signal from a base station and analyzes the received downlink channel signal;
in this embodiment, the UE may receive a downlink channel signal sent by the base station through a downlink channel, and after receiving the downlink channel signal, may analyze the downlink channel signal, and the specific process is not limited here.
102. The UE generates an uplink channel signal according to the analyzed downlink channel signal and calculates uplink transmitting power;
after analyzing the downlink channel signal, the UE may generate an uplink channel signal according to the analyzed downlink channel signal, and calculate uplink transmit power.
In this embodiment, the uplink channel signal includes an uplink channel data signal and a DMRS.
103. The UE respectively determines a power calibration value of an uplink channel data signal and a power calibration value of a DMRS according to a downlink channel signal, uplink transmitting power, a power increment in the generation process of the uplink channel data signal and a power increment in the generation process of the DMRS;
the UE may generate the uplink channel data signal and the DMRS through step 102, and then the UE may calculate a power increment in the uplink channel data signal generation process and a power increment in the DMRS generation process, and then, in combination with the downlink channel signal and the uplink transmission power, may respectively determine a power calibration value of the uplink channel data signal and a power calibration value of the DMRS.
104. And the UE firstly respectively carries out power calibration of the uplink channel data signal and power calibration of the DMRS in the baseband processing flow according to the power calibration value of the uplink channel data signal, the power calibration value of the DMRS, a preset hardware power control parameter and a baseband processing characteristic parameter, and then carries out power calibration of the uplink channel data signal and power calibration of the DMRS in a unified manner in the hardware power control flow.
In this embodiment, the UE may perform power calibration of the uplink channel data signal and power calibration of the DMRS in the baseband processing flow respectively according to the power increment in the uplink channel data signal generation process and the power increment in the DMRS generation process calculated in step 103 and according to preset hardware power control parameters and baseband processing characteristic parameters, and then perform power calibration of the uplink channel data signal and power calibration of the DMRS in the hardware power control flow in a unified manner.
In the embodiment, the UE does not consider the change of the signal power in the baseband signal processing process of the uplink channel data signal and the DMRS, so that the accuracy of baseband processing is ensured to the maximum extent;
secondly, the power of the uplink channel data signal and the DMRS is adjusted to the same power level after the power of the baseband part is adjusted, so that the performance of the base station for channel estimation and data signal detection by utilizing the DMRS can be effectively ensured;
and thirdly, the UE combines a downlink channel signal, uplink transmission power, a power increment in the generation process of the uplink channel data signal and a power increment in the generation process of the demodulation reference signal of the base station to respectively determine a power calibration value of the uplink channel data signal and a power calibration value of the demodulation reference signal, and accurately controls the uplink transmission power of the UE by calibrating the power of the uplink channel data signal and the power of the demodulation reference signal, so that the accuracy of the baseband signal of the UE is effectively ensured, and the processing complexity of hardware is low while the transmission power meets the preset transmission power.
For understanding, the following describes the ue transmit power control method in detail with reference to fig. 2, and another embodiment of the ue transmit power control method includes:
201. the UE receives a downlink channel signal from a base station and analyzes the received downlink channel signal;
in this embodiment, the UE may receive a downlink channel signal sent by the base station from the base station through a downlink channel, and after receiving the downlink channel signal, may analyze the downlink channel signal, and the specific process is not limited here.
The downlink channel signal in this embodiment includes power control related information and uplink grant information related to transmission of the uplink channel signal.
The uplink grant information may include resource allocation information, a modulation and coding scheme, Hybrid Automatic Repeat Request (HARQ) information, Transmit Power Control (TPC) information, and Channel Quality Indicator (CQI) information.
The power control related information is included in DCI0 and DCI3/DCI3A of the downlink channel signal, and the uplink grant information is included in DCI 0.
202. The UE generates an uplink channel signal according to the analyzed downlink channel signal and calculates uplink transmitting power;
after analyzing the downlink channel signal, the UE may generate an uplink channel signal according to the analyzed downlink channel signal, and calculate uplink transmit power.
In this embodiment, the uplink channel signal includes an uplink channel data signal and a DMRS.
The uplink Channel in this embodiment may be one or a combination of several of a PUSCH, a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), and a Sounding Reference Signal Channel (SRS).
The specific process of generating the uplink channel signal may be performed according to 3GPP TS36.211, 36.212, and 36.213 protocols, and the power is not considered to be constant in the implementation, so as to ensure the maximum accuracy of the uplink channel signal.
Correspondingly, the process of calculating the uplink transmission power can also be calculated according to the formula in section 5.1 of the 3GPP TS36.213 protocol.
In this embodiment, the UE generates a PUSCH uplink channel signal according to the uplink authorization information in the parsed DCI0, the PUSCH transmission channel data is sequentially subjected to scrambling, modulation, and transmission precoding processing, and power constancy is not considered in implementation, so as to ensure maximum accuracy of the uplink channel signal; the generation method of the PUSCH demodulation reference signal may refer to section 5.5.2.1 of the TS36.211 protocol.
The UE maps the PUSCH data and the PUSCH demodulation reference signal to data of one subframe according to the mapping rule of the PUSCH channel, and it is assumed here that SRS transmission is not performed on the PUSCH. And carrying out SC-FDMA baseband processing on the mapped data to obtain a baseband PUSCH uplink channel data signal to be sent and a demodulation reference signal.
According to the analyzed downlink channel signal of the base station, the UE calculates the PUSCH transmitting power in the uplink subframe i according to the following formula, wherein the power calculated by the formula is the PUSCH transmitting power of the UE expected by the base station, and the unit is dBm:
PPUSCH(i)＝min{PCMAX，10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)} (1)
in the above formula, PCMAXIs the UE maximum supported transmit power;
MPUSCH(i) indicates the number of PRBs allocated to the UE by DCI 0;
PO_PUSCH(j) the power reference value is a semi-statically set power reference value and can be obtained by analysis according to the base station control information, and j takes the value of 0, 1 or 2;
α (j) represents a compensation amount (path loss compensation factor) for path loss, and can be obtained by analysis according to base station control information;
PL represents the path loss of a downlink, and is obtained by measuring a common reference signal of a downlink cell by UE in dB;
ΔTF(i) the offset corresponding to the coding rate and the modulation mode can be obtained by analyzing and calculating according to the base station control information;
f (i) is the power increment, primarily related to the TPC command.
203. The UE determines a corresponding relation between a power calibration value under the reference bandwidth configuration and uplink transmitting power required by a system to the UE under the reference bandwidth configuration;
the UE may generate the uplink channel data signal and the DMRS, and then the UE may calculate a power increment in a generation process of the uplink channel data signal and a power increment in a generation process of the DMRS, and then, in combination with the downlink channel signal and the uplink transmit power, may respectively determine a power calibration value of the uplink channel data signal and a power calibration value of the DMRS.
Specifically, the UE may first determine a corresponding relationship between a power calibration value under the reference bandwidth configuration and uplink transmission power of the UE required by the system under the reference bandwidth configuration, and is described by taking a PUSCH channel data signal as an example, where the measurement method is as follows:
the calibrated PUSCH channel data signal is transmitted out through a radio frequency circuit, the actual power value transmitted by the UE is measured through instruments such as a frequency spectrograph, and the following formula can be obtained according to the measurement result:
wherein,the left side and the right side of the expression have equivalent mapping relation, but not equal relation;
configuring the PUSCH transmission power of the UE expected by the base station under the reference bandwidth, namely the actual transmission power of the UE measured by instruments such as a frequency spectrograph and the like, wherein the value is designed in advance before measurement;
the power increment introduced in the baseband signal processing process of the PUSCH channel data signal under the reference bandwidth configuration is mainly expressed as related to the bandwidth configuration of the system in the embodiment, but the value is related to the whole baseband processing process of the PUSCH channel data signal;
i.e. the power calibration value in the reference bandwidth configuration.
It can be understood that, in this step, the expression may also be obtained by using the PUSCH demodulation reference signal as a reference, and details are not described here.
204. The UE determines the current bandwidth configuration according to the uplink authorization information in the downlink channel signal;
in this embodiment, the UE may acquire the uplink grant information from the downlink channel signal, and then may determine the current bandwidth configuration according to the uplink grant information, and the specific process is not limited here.
205. The UE determines the difference value of the power increment introduced in the baseband signal processing process relative to the power increment introduced in the reference bandwidth configuration;
the UE may determine, according to the current bandwidth configuration, a difference value of a power increment introduced during the baseband signal processing of the PUSCH channel data signal with respect to a power increment introduced during the baseband signal processing of the reference bandwidth configuration, and record the difference value as Δ P.
The power increment introduced in the baseband signal processing process of the PUSCH channel data signal under the current bandwidth configuration is mainly expressed as being related to the bandwidth configuration of the system in the embodiment, but the value is related to the whole baseband processing process of the PUSCH channel data signal under the current bandwidth;
power increment introduced in uplink channel data signal processing process under current bandwidth configurationConfiguring a power increment introduced during processing of a baseband signal relative to a reference bandwidthThe difference value delta P can be calculated in real time and can also be realized by storing a table, and the table size is required to be the total number of the configurable bandwidth size when the table is stored.
Similarly, the power increment introduced in the process of processing the uplink demodulation reference signal under the current bandwidth configurationConfiguring a power increment introduced during processing of a baseband signal relative to a reference bandwidthThe difference Δ P' of (d) is expressed as:
206. the UE respectively determines the power calibration values of the uplink channel data signal and the DMRS under the current bandwidth configuration according to the uplink transmission power, the corresponding relation, and the difference value of the power increment introduced in the processing process of the uplink channel data signal and the DMRS under the current bandwidth configuration relative to the power increment introduced in the processing process of the reference bandwidth configuration;
according to the formula (2), the transmission power of the base station expected UE under the current PRB configuration can be obtainedCalibrating power with an uplink channel data signal under a current PRB configurationThe relational expression of (1) is:
the transmission power of the UE expected by the base station under the current PRB configurationPUSCH (physical uplink shared channel) transmission power of UE (user equipment) expected by base station under reference bandwidth configurationThe difference of (d) is denoted as c, i.e.:
from equations (2), (3), (5) and (6):
it can be seen that the power calibration value of the uplink channel data signal under the current bandwidth configurationCalibration values for power only with reference bandwidth configurationTransmission power of base station expected UE under current PRB configurationPUSCH (physical uplink shared channel) transmission power of UE (user equipment) expected by base station under reference bandwidth configurationIs related to the difference value Δ P of the power increment introduced in the processing of the baseband signal under the current bandwidth configuration relative to the power increment introduced in the processing of the baseband signal under the reference bandwidth configuration. Wherein the reference bandwidth configurationLower power calibration valueAnd PUSCH transmission power of UE expected by base station under reference bandwidth configurationAre known definitely and are not related to the scheduling information of the base station;
transmission power of base station expected UE under current PRB configurationThe control information is obtained by calculation according to the control information issued by the base station;
the difference Δ P between the power increment introduced in the processing process of the baseband signal under the current bandwidth configuration and the power increment introduced in the processing process of the baseband signal under the reference bandwidth configuration may be calculated in real time or may be obtained by storing a table.
Similarly, the demodulation reference signal power calibration value under the current bandwidth configurationCalibration values for power only with reference bandwidth configurationTransmission power of base station expected UE under current PRB configurationPUSCH (physical uplink shared channel) transmission power of UE (user equipment) expected by base station under reference bandwidth configurationIs related to the difference Δ P' of the power increment introduced during processing of the baseband signal under the current bandwidth configuration with respect to the power increment introduced during processing of the baseband signal under the reference bandwidth configuration, wherein:
whereinThe power increment introduced in the PUSCH demodulation reference signal baseband signal processing procedure under the reference bandwidth configuration is mainly expressed in the embodiment as being related to the bandwidth configuration of the system, but the value is related to the whole demodulation reference signal baseband processing procedure.
207. According to the power calibration value of the uplink channel data signal, the power calibration value of the DMRS, a preset hardware power control parameter and a baseband processing characteristic parameter, the UE firstly carries out power calibration of the uplink channel data signal and power calibration of the DMRS in a baseband processing flow respectively, and then carries out power calibration of the uplink channel data signal and power calibration of the DMRS in a unified manner in the hardware power control flow.
The UE can firstly respectively carry out power calibration of the uplink channel data signal and power calibration of the DMRS in the baseband processing flow according to the calculated power increment in the uplink channel data signal generation process and the calculated power increment in the DMRS generation process and according to preset hardware power control parameters and baseband processing characteristic parameters, then uniformly carry out power calibration of the uplink channel data signal and power calibration of the DMRS in the hardware power control flow, and the uplink channel data signal and the demodulation reference signal after power calibration have a power level grade with zero error in a subframe.
The power calibration can be realized by baseband signals of a software part, hardware realization and combination of software and hardware; preferably, the present embodiment may be implemented by combining software and hardware, where the calibration value includes power calibration of a baseband signal processing section and power calibration of a hardware section, and specifically includes the following steps:
(1) and obtaining the power calibration value of the PUSCH channel data signal under the current bandwidth configurationAnd PUSCH demodulation reference signal power calibration value under current bandwidth configurationLower value of the power calibration value is rounded down and recorded as
(2) And the power calibration value of the PUSCH channel data signal under the current bandwidth configurationAndthe difference value of the PUSCH channel data signal is used for completing the power calibration of a baseband signal processing part of the PUSCH channel data signal;
power calibration value according to PUSCH demodulation reference signal under current bandwidth configurationAndthe power calibration of the baseband signal processing section of the PUSCH demodulation reference signal is completed.
(3) Obtained according to the above stepsCompleting power calibration of hardware portions of the PUSCH channel data signal and the PUSCH demodulation reference signal.
As can be seen from (1) and (2) above, the baseband adjustment adjusts the power of the data and the DMRS respectively; it can be seen from (3) that the hardware part only needs to be as follows for Data and DMRSThe value is adjusted once.
In the embodiment, the power change is not considered in the generation process of the baseband signal, so that the generation precision of the baseband signal is effectively ensured;
secondly, the UE records the power increment introduced in the baseband signal processing and compensates the power increment into the baseband signal through power calibration; during power compensation, the power of the decimal dB part is compensated at a baseband; the radio frequency only calibrates the power of an integer dB part, which effectively combines the characteristics of software and hardware power control, and greatly reduces the complexity and cost of hardware power control while ensuring the precision;
and thirdly, the UE adjusts the power of the uplink channel data signal and the demodulation reference signal in the same subframe to the same power level in the baseband signal processing, thereby powerfully ensuring the performance of the base station end for performing channel estimation and data signal detection by using the demodulation reference signal. Hardware power control is not needed to be carried out on the uplink channel data signal and the demodulation reference signal respectively, and one uplink subframe only needs to be subjected to power control once through hardware, so that the complexity, precision loss and power consumption of hardware processing are reduced.
In the above description of the method for controlling the transmit power of the ue of the present invention, the following describes a device for controlling the transmit power of the ue of the present invention, and referring to fig. 3, an embodiment of the device for controlling the transmit power of the ue of the present invention includes:
a receiving unit 301, configured to receive a downlink channel signal from a base station, and analyze the received downlink channel signal;
a generating unit 302, configured to generate an uplink channel signal according to the analyzed downlink channel signal, where the uplink channel signal includes an uplink channel data signal and a demodulation reference signal DMRS;
a power calculating unit 303, configured to calculate uplink transmission power according to the analyzed downlink channel signal;
a calibration value calculation unit 304, configured to determine a power calibration value of the uplink channel data signal and a power calibration value of the DMRS according to the downlink channel signal, the uplink transmission power, a power increment in the uplink channel data signal generation process, and a power increment in the DMRS generation process, respectively;
the power calibration unit 305 is configured to perform power calibration on the uplink channel data signal and power calibration on the DMRS in the baseband processing flow, respectively, and then perform power calibration on the uplink channel data signal and power calibration on the DMRS in the hardware power control flow, according to the power calibration value on the uplink channel data signal, the power calibration value on the DMRS, a preset hardware power control parameter, and a baseband processing characteristic parameter.
In this embodiment, the power calibration unit 305 performs power calibration on the uplink channel data signal and the demodulation reference signal, and the uplink channel data signal and the demodulation reference signal have a power level with zero error in a subframe.
The calibration value calculation unit 304 in the present embodiment may further include:
a corresponding relationship determining module 3041, configured to determine a corresponding relationship between a power calibration value under the reference bandwidth configuration and uplink transmit power of a UE required by the system under the reference bandwidth configuration;
a bandwidth configuration determining module 3042, configured to determine a current bandwidth configuration according to the uplink authorization information in the downlink channel signal;
a difference value calculating module 3043, configured to determine, according to the current bandwidth configuration, a difference value between a power increment introduced in the baseband signal processing process and a power increment introduced in the baseband signal processing process when the reference bandwidth configuration is performed;
and a calibration value calculation module 3044, configured to separately determine, by combining the uplink transmission power, the corresponding relationship, and the difference between the uplink channel data signal under the current bandwidth configuration and the power increment introduced in the DMRS processing procedure relative to the power increment introduced in the base band signal processing procedure under the reference bandwidth configuration, the power calibration values of the uplink channel data signal and the DMRS under the current bandwidth configuration.
In this embodiment, the specific implementation manner of the functions of each unit and module is similar to the method flow described in the embodiment shown in fig. 2, and is not described here again.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, where the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The foregoing detailed description of the method and apparatus for controlling ue transmit power provided by the present invention is provided, and for those skilled in the art, the idea of the embodiment of the present invention may be changed in the specific implementation and application scope, and therefore, the content of this specification should not be construed as a limitation to the present invention.
Claims (8)
1. A method for controlling transmit power of a user equipment, comprising:
user Equipment (UE) receives a downlink channel signal from a base station and analyzes the received downlink channel signal;
the UE generates an uplink channel signal according to the analyzed downlink channel signal and calculates uplink transmitting power, wherein the uplink channel signal comprises an uplink channel data signal and a demodulation reference signal DMRS;
the UE respectively determines a power calibration value of the uplink channel data signal and a power calibration value of the DMRS according to the downlink channel signal, the uplink transmitting power, the power increment in the uplink channel data signal generating process and the power increment in the DMRS generating process;
the UE respectively carries out power calibration of the uplink channel data signal and power calibration of the DMRS in a baseband processing flow according to the power calibration value of the uplink channel data signal, the power calibration value of the DMRS, a preset hardware power control parameter and a baseband processing characteristic parameter, and then carries out the power calibration of the uplink channel data signal and the power calibration of the DMRS in a unified manner in the hardware power control flow;
the UE respectively determines the power calibration value of the uplink channel data signal and the power calibration value of the DMRS according to the downlink channel signal, the uplink transmitting power, the power increment in the uplink channel data signal generating process and the power increment in the DMRS generating process, and the UE comprises the following steps:
the UE determines a corresponding relation between a power calibration value under the reference bandwidth configuration and uplink transmitting power required by a system to the UE under the reference bandwidth configuration;
the UE determines the current bandwidth configuration according to the uplink authorization information in the downlink channel signal;
the UE determines the difference value of the power increment introduced in the baseband signal processing process relative to the power increment introduced in the reference bandwidth configuration;
and the UE respectively determines the power calibration values of the uplink channel data signal and the DMRS under the current bandwidth configuration according to the uplink transmission power, the corresponding relation, and the difference value of the power increment introduced in the processing process of the uplink channel data signal and the DMRS under the current bandwidth configuration relative to the power increment introduced in the processing process of the reference bandwidth configuration.
2. The method of claim 1, wherein the power-calibrated uplink channel data signal and demodulation reference signal have a power level with zero error within a subframe.
3. The method of claim 1, wherein the uplink channel is one or a combination of a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), and a sounding reference signal channel (SRS).
4. The method according to any of claims 1 to 3, wherein the downlink channel signal comprises power control related information and uplink grant information related to transmitting uplink channel signal.
5. The method of claim 4, wherein the uplink grant information comprises resource allocation information, modulation and coding scheme, hybrid automatic repeat request (HARQ) information, Transmission Power Control (TPC), and Channel Quality Indication (CQI) information.
6. The method according to claim 1, wherein the difference between the power increment introduced during the processing of the uplink channel data signal and the demodulation reference signal under the current bandwidth configuration and the power increment introduced during the processing of the baseband signal under the reference bandwidth configuration is obtained by real-time calculation or by storing a table.
7. An apparatus for controlling user equipment transmission power, comprising:
a receiving unit, configured to receive a downlink channel signal from a base station, and analyze the received downlink channel signal;
a generating unit, configured to generate an uplink channel signal according to the analyzed downlink channel signal, where the uplink channel signal includes an uplink channel data signal and a demodulation reference signal DMRS;
the power calculation unit is used for calculating uplink transmitting power according to the analyzed downlink channel signal;
the calibration value calculation unit is used for respectively determining the power calibration value of the uplink channel data signal and the power calibration value of the DMRS according to the downlink channel signal, the uplink transmitting power, the power increment in the uplink channel data signal generation process and the power increment in the DMRS generation process;
the power calibration unit is used for respectively calibrating the power of the uplink channel data signal and the power of the DMRS in the baseband processing flow according to the power calibration value of the uplink channel data signal, the power calibration value of the DMRS, a preset hardware power control parameter and a baseband processing characteristic parameter, and then uniformly calibrating the power of the uplink channel data signal and the power of the DMRS in the hardware power control flow;
the calibration value calculation unit includes:
a corresponding relation determining module, configured to determine a corresponding relation between a power calibration value under the reference bandwidth configuration and uplink transmit power of the UE required by the system under the reference bandwidth configuration;
the bandwidth configuration determining module is used for determining the current bandwidth configuration according to the uplink authorization information in the downlink channel signal;
a difference value calculating module, configured to determine, according to the current bandwidth configuration, a difference value between a power increment introduced in the baseband signal processing process and a power increment introduced in the baseband signal processing process when the reference bandwidth configuration is performed;
and the calibration value calculation module is used for respectively determining the power calibration values of the uplink channel data signal and the DMRS under the current bandwidth configuration according to the difference value of the uplink transmission power, the corresponding relation, the uplink channel data signal under the current bandwidth configuration and the power increment introduced in the DMRS processing process relative to the power increment introduced in the base band signal processing process under the reference bandwidth configuration.
8. The apparatus of claim 7, wherein the power calibration unit performs power calibration on the uplink channel data signal and the demodulation reference signal at a power level with zero error within a subframe.
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| CN104219753B (en) * | 2013-05-29 | 2018-08-21 | 锐迪科（重庆）微电子科技有限公司 | Uplink power control method, system and terminal |
| US9918284B2 (en) | 2015-09-23 | 2018-03-13 | Futurewei Technologies, Inc. | Methods and systems for downlink transmit power control command transmission |
| WO2017132957A1 (en) * | 2016-02-04 | 2017-08-10 | 华为技术有限公司 | Method for transmitting uplink information, user equipment, base station and apparatus |
| CN107889206B (en) * | 2016-09-30 | 2023-01-20 | 中兴通讯股份有限公司 | Method and device for processing uplink signal transmission power, base station and terminal |
| US10644812B2 (en) * | 2017-03-22 | 2020-05-05 | Qualcomm Incorporated | User equipment antenna calibration with assistance from other devices |
| WO2018205160A1 (en) | 2017-05-10 | 2018-11-15 | 南通朗恒通信技术有限公司 | Method and device for wireless communication for user and base station |
| CN109392070B (en) * | 2017-08-11 | 2021-05-11 | 华为技术有限公司 | Method and device for transmitting signal |
| CN108684076B (en) * | 2018-05-11 | 2019-12-03 | 中国信息通信研究院 | A kind of uplink power distribution method and mobile communication equipment |
| CN117439723A (en) | 2018-05-11 | 2024-01-23 | 华为技术有限公司 | Communication method and communication device |
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