WO2017118068A1 - 功率控制方法、装置及基站 - Google Patents

功率控制方法、装置及基站 Download PDF

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Publication number
WO2017118068A1
WO2017118068A1 PCT/CN2016/098220 CN2016098220W WO2017118068A1 WO 2017118068 A1 WO2017118068 A1 WO 2017118068A1 CN 2016098220 W CN2016098220 W CN 2016098220W WO 2017118068 A1 WO2017118068 A1 WO 2017118068A1
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Prior art keywords
power
user terminal
radio frequency
transmit power
parameter
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PCT/CN2016/098220
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English (en)
French (fr)
Inventor
梁彩云
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中兴通讯股份有限公司
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Publication of WO2017118068A1 publication Critical patent/WO2017118068A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a power control method, apparatus, and base station.
  • the cell merging technology is to connect a plurality of remote radio units (Radio Remote Units, RRUs) to the same baseband processing unit (BBU) and set them as the same logical cell.
  • RRUs Radio Remote Units
  • BBU baseband processing unit
  • the application of the cell merging technology mainly involves a baseband cell merging system and a radio frequency merging system.
  • radio frequency combining technology multiple remote radio units participating in cell merging are only regarded as one cell for the baseband, and only a plurality of radio units can be seen on the operation and maintenance surface. This method reduces the number of cells and saves.
  • Baseband resources at the same time, also solve the problem of multi-frequency radio unit co-frequency interference, effectively improving network performance.
  • the uplink noise figure is relatively small, and the power control is implemented according to the unified standard of the 3rd Generation Partnership Project (3GPP) protocol.
  • 3GPP 3rd Generation Partnership Project
  • the open-loop operating point does not consider the influence of the noise figure on the system, and the conventional baseband cell combining system can directly acquire the signal-to-noise ratio of the received signal after receiving the uplink signal. Therefore, in the baseband cell merging system, the control of the uplink transmit power is to directly correct the transmit power of the user terminal by using closed-loop power control according to the acquired signal-to-noise ratio.
  • the closed-loop power control method is not very suitable in the RF merging system.
  • the uplink channel noise figure increases with the number of combining channels, for example, When 32 RF units are combined, the noise figure is increased by 10*lg(32), which is 15dB, compared to the case of no combining. Therefore, if in this case, the initial uplink transmission power is set to be ignored as in the baseband cell combining system, the initial uplink transmission power is different from the actually expected uplink transmission power. Normally, the difference that needs to be corrected is very large.
  • the baseband processing unit can also obtain the signal-to-noise ratio, but the initial operating point deviation is relatively large, which will make the adjustment time longer.
  • the main technical problem to be solved by the present invention is to provide an uplink transmit power control strategy, which solves the problem that the open loop operating point is not in an optimal state in the related art, and the uplink transmit power in the radio frequency combined system is used by using the closed loop power control strategy.
  • the technical problems of long adjustment time and adjustment cannot be achieved in one step.
  • the present invention provides a power control method, which includes:
  • the target uplink transmission power is obtained according to the modified power determination parameter.
  • the power determination parameter includes at least one of a user terminal power reference parameter and a downlink path loss.
  • modifying the user terminal power reference parameter includes:
  • obtaining the target uplink transmit power according to the modified user terminal power reference parameter includes:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the uplink resource fast amount allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the corrected user terminal power reference parameter and The sum of the cell power reference parameters
  • ⁇ is the cell-specific path loss compensation coefficient
  • PL is the user terminal to measure the downlink path loss
  • ⁇ mcs specifies the specific parameter for the radio resource controller, which is the offset corresponding to the coding rate and the modulation mode
  • ⁇ i is a cell-specific transmit power control closed-loop correction factor
  • f(x) represents a function given by a higher layer.
  • correcting the downlink path loss includes:
  • the modified transmit power value is a sum of an actual transmit power value of the reference signal and the radio frequency combined gain
  • the corrected downlink path loss is calculated according to the received power value and the corrected transmit power value.
  • obtaining the target uplink transmit power according to the modified downlink path loss includes:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the fast amount of uplink resources allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the user terminal power reference parameter and the cell power reference parameter
  • ⁇ is a cell-specific path loss compensation coefficient
  • PL is the corrected downlink path loss
  • ⁇ mcs specifies a specific parameter for the radio resource controller, which is an offset corresponding to the coding rate and modulation mode
  • ⁇ i is The cell-specific transmit power control closed-loop correction factor
  • f(x) represents the function given by the higher layer.
  • calculating the radio frequency combining gain according to the number of the radio frequency units includes according to the formula:
  • Radio frequency combining gain 10*lg(N), where N is the number of radio frequency units;
  • the radio frequency combining gain is calculated.
  • the invention also provides a power control device comprising:
  • the radio frequency merging acquisition unit is configured to obtain the number of radio frequency units for cell merging in the service configuration
  • a combined gain calculation unit configured to calculate a radio frequency combining gain according to the number of the radio frequency units
  • a parameter correction unit configured to modify an uplink transmit power determination parameter according to the radio frequency combined gain
  • the transmission power determining unit is configured to obtain the target uplink transmission power according to the corrected power determination parameter.
  • the parameter modification unit includes at least one of a user terminal power reference parameter correction unit and a downlink path loss correction unit.
  • the user terminal power reference parameter correction unit is configured to modify the user terminal power reference parameter
  • the original data obtaining module is configured to obtain the original user terminal power reference parameter
  • the first correction module is configured to calculate the corrected user terminal power reference parameter by summing the original user terminal power reference parameter and the radio frequency combining gain.
  • the sending power determining unit includes a first power calculating module, and the first power calculating module is configured to obtain a target uplink sending power according to the modified user terminal power reference parameter, which is specifically as follows
  • the uplink transmit power calculation formula shown obtains the target uplink transmit power:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the uplink resource fast amount allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the corrected user terminal power reference parameter and The sum of the cell power reference parameters
  • ⁇ is the cell-specific path loss compensation coefficient
  • PL is the user terminal to measure the downlink path loss
  • ⁇ mcs specifies the specific parameter for the radio resource controller, which is the offset corresponding to the coding rate and the modulation mode
  • ⁇ i is a cell-specific transmit power control closed-loop correction factor
  • f(x) represents a function given by a higher layer.
  • the downlink path loss correcting unit is configured to correct the downlink path loss, and the method includes:
  • a receiving power value obtaining module configured to acquire a received power value of the reference signal received by the user terminal
  • a modified transmit power value obtaining module configured to obtain a modified transmit power value of the reference signal, where the modified transmit power value is a sum of an actual transmit power value of the reference signal and the radio frequency combined gain;
  • the second correction module is configured to calculate the corrected downlink path loss according to the received power value and the corrected transmit power value.
  • the sending power determining unit includes a second power calculating module, where the second power calculating module is configured to obtain a target uplink sending power according to the corrected downlink path loss, which is specifically included as follows
  • the uplink transmit power calculation formula obtains the target uplink transmit power:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the fast amount of uplink resources allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the user terminal power reference parameter and the cell power reference parameter
  • ⁇ is a cell-specific path loss compensation coefficient
  • PL is the corrected downlink path loss
  • ⁇ mcs specifies a specific parameter for the radio resource controller, which is an offset corresponding to the coding rate and modulation mode
  • ⁇ i is The cell-specific transmit power control closed-loop correction factor
  • f(x) represents the function given by the higher layer.
  • the combining gain calculation unit calculates the radio frequency combining gain according to the number of the radio frequency units, according to the formula:
  • Radio frequency combining gain 10*lg(N), where N is the number of radio frequency units;
  • the radio frequency combining gain is calculated.
  • the present invention also provides a base station comprising the power control device as described above.
  • Another embodiment of the present invention provides a computer storage medium storing execution instructions for performing the method in the above embodiments.
  • the uplink transmit power control method provided by the present invention calculates the radio frequency combining gain by acquiring the number of radio frequency units participating in the cell merge, and then performs corresponding modification on the uplink transmit power determining parameter according to the radio frequency combining gain; When the parameters are determined, the thermal noise of the plurality of remote radio units is considered. Therefore, the target uplink transmission power calculated according to the modified uplink transmission power determination parameter is closer to the expected uplink transmission power, thereby omitting the subsequent complicated.
  • the adjustment process saves time in the power control process.
  • FIG. 1 is a flowchart of a power control method according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of modifying a power reference parameter of a user terminal according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of modifying a downlink path loss according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of a power control apparatus according to Embodiment 2 of the present invention.
  • Figure 5 is a schematic diagram of the parameter correction unit of Figure 4.
  • FIG. 6 is another schematic diagram of the parameter correction unit of FIG. 4.
  • Figure 7 is another schematic diagram of the parameter correction unit of Figure 4.
  • FIG. 8 is a schematic diagram of a transmission power determining unit of FIG. 4;
  • FIG. 9 is another schematic diagram of the transmission power determining unit of FIG. 4; FIG.
  • FIG. 10 is another schematic diagram of the transmission power determining unit of FIG. 4.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 Please refer to FIG. 1:
  • one cell corresponds to one remote radio unit and one remote radio unit is connected to a baseband processing unit.
  • the combining technology supports multiple remote radio units under the same baseband processing unit to form a logical cell, that is to say, in the radio frequency combining system, one baseband processing unit actually corresponds to multiple remote radio units, so that This is done to reduce the number of cells, thereby effectively reducing interference and improving network performance.
  • the signal in the downlink direction, the signal is copied and transmitted by the remote aggregation unit to multiple remote radio units; in the uplink direction, the signals received by the remote radio unit are combined by the aggregation unit and sent to the baseband processing unit for solution.
  • the noise gain is 10*lg(N)dB, compared to the single far end. 10*lg(1)dB (ie 0dB thermal noise gain) in the case of a radio unit, which increases by 10*lg(N)dB, ie the signal-to-noise ratio deteriorates by 10log(N)dB.
  • the signal-to-noise ratio of the signal received by the demodulation unit reaches the same demodulation threshold as in the non-merging system, and the uplink transmission power needs to be increased by 10 log(N) dB.
  • the number of radio frequency units to be combined by the cell must be obtained, and the number of radio frequency units in a radio frequency combining system can be obtained in multiple ways.
  • the radio frequency can be directly obtained.
  • the number of remote radio units in the merging system is the number of radio units that participate in cell radio frequency combining.
  • the direct purpose of obtaining the radio frequency combining gain is to modify the uplink transmit power determining parameter, so that the obtained uplink transmit power is closer to the expected value.
  • the parameter that can be modified according to the radio frequency combining gain includes at least the user terminal power reference parameter. And one of the downlink path loss, and how to modify the above two uplink transmit power determining parameters respectively according to FIG. 2 and FIG. 3, and how to further calculate the target uplink transmit power according to the modified uplink transmit power determining parameter.
  • the modified uplink transmit power determination parameter is the user terminal power reference parameter, please refer to FIG. 2:
  • the original user-specific parameter is determined by a Radio Resource Control (RRC), and the original user-specific parameter plus the radio frequency combining gain is the corrected user terminal power reference parameter.
  • RRC Radio Resource Control
  • the sum of the cell power reference parameter and the corrected user-specific parameter is substituted into the following formula as P0, and the target uplink transmit power can be obtained:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the uplink resource fast amount allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the corrected user terminal power reference parameter and The sum of the cell power reference parameters
  • ⁇ is the cell-specific path loss compensation coefficient
  • PL is the user terminal to measure the downlink path loss
  • ⁇ mcs specifies the specific parameter for the radio resource controller, which is the offset corresponding to the coding rate and the modulation mode
  • ⁇ i is a cell-specific transmit power control closed-loop correction factor
  • f(x) represents a function given by a higher layer.
  • the calculation of the original downlink path loss is calculated according to the provisions of the Time Division Long Term Evolution (TD-LTE) power control protocol.
  • the base station sends a reference signal to the user terminal in a broadcast manner, and the user terminal receives the reference signal, and calculates a difference between the reference signal sent by the base station and the reference signal received by the user terminal, where the difference is the downlink path loss.
  • the above calculation of the downlink path loss is based on the premise that the cell does not perform radio frequency combining, and in the case of cell radio frequency combining, the radio frequency combining gain needs to be affected on the obtained original downlink path loss, so the target uplink transmitting power is obtained.
  • the baseband processing unit sends a reference signal RS with power P0 to the user terminal, and the user terminal receives the reference signal RS, assuming that the received signal is received.
  • the power of the RS is P0'
  • the value of the original downlink path loss is P0-P0'.
  • the baseband processing unit informs the user terminal by means of signaling that the transmit power value of the reference signal transmitted by the user terminal is the sum of the P0 and the radio frequency combined gain.
  • the value of the transmit power of the reference signal RS that the user terminal is informed is actually the corrected transmit power value, which is P0+10*lg(N), and the corrected transmit power value of the RS is greater than the value of the actual transmit power of the RS by 10*lg. (N).
  • the calculated downlink path loss value is P0+10*lg(N)-P0', which is 10*lg(N) larger than the original downlink path loss.
  • the target uplink transmission power can be obtained:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the fast amount of uplink resources allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the user terminal power reference parameter and the cell power reference parameter
  • ⁇ is a cell-specific path loss compensation coefficient
  • PL is the corrected downlink path loss
  • ⁇ mcs specifies a specific parameter for the radio resource controller, which is an offset corresponding to the coding rate and modulation mode
  • ⁇ i is The cell-specific transmit power control closed-loop correction factor
  • f(x) represents the function given by the higher layer.
  • the power control method in this embodiment is proposed to solve the problem of power control in the radio frequency combining system, in fact, the method also has the advantage of being compatible with the non-merging system.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment mainly describes the power control device provided by the present invention in detail.
  • the power control device 40 includes a radio frequency combining acquisition unit 401, a combined gain calculation unit 402, a parameter correction unit 403, and a transmission power determination unit 404.
  • the radio frequency combination obtaining unit 401 is configured to obtain the number of radio frequency units for radio frequency combining in the service configuration.
  • one cell corresponds to one remote radio unit and one remote radio unit is connected to a baseband processing unit. Since the combining technology supports multiple remote radio units under the same baseband processing unit to form a logical cell, that is to say, in the radio frequency combining system, one baseband processing unit actually corresponds to multiple cells and remote radio units. This is done to reduce the number of cells, thereby effectively reducing interference and improving network performance.
  • the signal in the downlink direction, the signal is copied and sent by the remote aggregation unit to multiple remote radio units; in the uplink direction, the signals received by the remote radio unit are combined by the aggregation unit and then sent to the baseband processing unit for demodulation. .
  • the noise gain is 10*lg(N)dB, compared to single far 10*lg(1)dB (ie, 0dB thermal noise gain) in the case of the terminal RF unit, which increases by 10*lg(N)dB, that is, the signal-to-noise ratio deteriorates by 10*lg(N)dB.
  • the signal-to-noise ratio of the signal received by the demodulation unit reaches the same demodulation threshold as in the non-merging system, and the uplink transmission power needs to be increased by 10*lg(N)dB.
  • the radio frequency merge acquisition unit 401 In order to obtain the correct uplink transmit power, the radio frequency merge acquisition unit 401 must Obtaining the number of the radio unit to be merged in the cell, and obtaining the number of the cells in the radio combining system.
  • the radio frequency combining and acquiring unit 401 can directly obtain the radio frequency in the radio frequency combining system.
  • the number of cells is taken as the number of radio frequency units participating in the radio frequency combining.
  • the merge gain calculation unit 402 calculates the radio frequency combining gain according to the number of radio frequency units. After the radio frequency combining and acquiring unit 401 obtains the number of radio frequency units participating in the cell merging in a certain radio frequency combining system, the merged gain calculating unit 402 can directly according to the formula:
  • the direct purpose of the merge gain calculation unit 402 to obtain the radio frequency combining gain is to cause the parameter correcting unit 403 to modify the uplink transmit power determining parameter, so that the uplink transmit power obtained by the transmit power determining unit 404 is closer to the expected value.
  • the parameter correction unit 403 corrects the uplink transmission power determination parameter according to the radio frequency combining gain.
  • the parameter correction unit 403 includes at least one of the user terminal power reference parameter correction unit 4031 and the downlink path loss correction unit 4032.
  • the parameter modification unit 403 When the parameter modification unit 403 includes only the user terminal power reference parameter modification unit 4031, as shown in FIG. 5, the parameter modification unit 403 first acquires the original user terminal power reference parameter by using the original data acquisition module 40311, and the original user specific parameter is used by the radio resource controller ( Radio Resource Control (abbreviated as RRC) determines, and then the first correction module 40312 is configured to calculate the original user terminal power reference parameter and the radio frequency combining gain to obtain the corrected user terminal power reference parameter.
  • RRC Radio Resource Control
  • the calculation of the downlink path loss is calculated according to the provisions of the Time Division Long Term Evolution (TD-LTE) power control protocol.
  • the base station sends a reference signal to the user terminal in a broadcast manner, and the user terminal receives the reference signal, and calculates a difference between the reference signal sent by the base station and the reference signal received by the user terminal, where the difference is the downlink path loss.
  • the above calculation of the downlink path loss is based on the premise that the cell does not perform radio frequency combining, and in the case of cell radio frequency combining, the basis of the original downlink path loss required is obtained. Further consideration is given to the influence of the RF combining gain. Therefore, before the target uplink transmission power is obtained, the original downlink path loss is corrected, and the corrected downlink path loss must be considered for the radio combining gain.
  • the downlink path loss correction unit 4032 includes a received power value acquisition module 40321 and a modified transmission power value acquisition module. 40322 and a second correction module 40323, wherein the received power value obtaining module 40321 is configured to acquire a received power value of the reference signal received by the user terminal; the modified transmit power value obtaining module 40322 is configured to obtain a corrected transmit power value of the reference signal; and the second correcting module 40323 calculates the corrected downlink path loss according to the received power value and the corrected transmit power value.
  • the baseband processing unit sends a power of P0 to the user terminal.
  • the reference signal RS the user terminal receives the reference signal RS, assuming that the received RS power is P0'; then the value of the original downlink path loss is P0-P0', but in this embodiment, since the baseband processing unit passes signaling
  • the method of telling the user terminal that the transmit power value of the reference signal transmitted by the terminal is the sum of the P0 and the radio frequency combining gain, it can be understood that the value of the transmit power of the RS obtained by the user terminal here is actually the corrected transmit power value, and the modified transmit The power value is greater than the value of the actual transmit power of the RS by 10*lg(N), that is, the corrected transmit power value obtained by the modified transmit power value acquisition module 40322 is P0+10*lg(N), and the received power value acquisition module
  • the transmission power determination unit 404 includes at least the first power calculation module 4041.
  • the first power calculation module 4041 sets the cell power reference parameter and the corrected The user-specific parameter summation is substituted into the following formula as P0, and the target uplink transmit power can be obtained:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the uplink resource fast amount allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the corrected user terminal power reference parameter and The sum of the cell power reference parameters
  • ⁇ is the cell-specific path loss compensation coefficient
  • PL is the user terminal to measure the downlink path loss
  • ⁇ mcs specifies the specific parameter for the radio resource controller, which is the offset corresponding to the coding rate and the modulation mode
  • ⁇ i is a cell-specific transmit power control closed-loop correction factor
  • f(x) represents a function given by a higher layer.
  • the transmission power determining unit 404 includes at least a second power calculation module 4042, and the second power calculation module 4042 substitutes the modified downlink path loss as a PL.
  • the target uplink transmit power can be obtained:
  • P is the target uplink transmit power
  • P max is the maximum transmit power of the user terminal
  • M is the fast amount of uplink resources allocated to the user terminal
  • P 0 represents the semi-static power reference, which is the user terminal power reference parameter and the cell power reference parameter
  • ⁇ is a cell-specific path loss compensation coefficient
  • PL is the corrected downlink path loss
  • ⁇ mcs specifies a specific parameter for the radio resource controller, which is an offset corresponding to the coding rate and modulation mode
  • ⁇ i is The cell-specific transmit power control closed-loop correction factor
  • f(x) represents the function given by the higher layer.
  • the parameter modification unit 403 can include the user terminal power reference parameter correction unit 4031 and the downlink path loss correction unit 4032 at the same time, as shown in FIG. 7.
  • the transmit power determining unit 404 can include both the first power calculation module 4041 and the second power calculation module 4042, as shown in FIG.
  • the power control device 40 provided in this embodiment may be set at a base station, a user terminal, or any On the third-party device, the uplink transmission power of the user terminal is controlled.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the embodiment provides a base station, which includes the power control device in the second embodiment.
  • the base station since the base station includes the foregoing power control device, after determining the uplink transmission power, the base station sends the power information to the user terminal, and causes the user terminal to send information to the terminal according to the determined uplink transmission power.
  • the power control method, apparatus, and base station provided by the embodiments of the present invention have the following beneficial effects: calculating the radio frequency combining gain by acquiring the number of radio frequency units participating in the cell combination, and then transmitting the uplink according to the radio frequency combining gain.
  • the power determination parameter is modified accordingly; since the thermal noise of multiple remote radio units is considered when the uplink transmission power determination parameter is modified, the target uplink transmission power calculated according to the modified uplink transmission power determination parameter is closer.
  • the power is transmitted at the desired uplink, thereby omitting the subsequent complicated adjustment process and saving the time of the power control process.

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Abstract

本发明公开了一种功率控制方法、装置及基站，包括：获取业务配置中进行小区合并的射频单元个数；根据所述射频单元个数计算射频合并增益；根据所述射频合并增益修正上行发送功率确定参数；根据修正后的功率确定参数得到目标上行发送功率。通过获取参与小区合并的射频单元个数来计算得到射频合并增益，然后根据该射频合并增益对上行发送功率确定参数进行相应的修改；由于修改上行发送功率确定参数时考虑了多个远端射频合并单元在合并时的热噪声，所以根据修改后的上行发送功率确定参数计算得到的目标上行发送功率更接近于期望的上行发送功率，从而省略了后续繁杂的调整过程，节省了功率控制过程的时间。

Description

功率控制方法、装置及基站 技术领域
本发明涉及无线通信领域，尤其涉及一种功率控制方法、装置及基站。
背景技术
小区合并技术是指将多个远端射频单元(Radio Remote Unit，简称为RRU)连接于同一个基带处理单元(Building Base band Unit，简称为BBU)，并设置为同一逻辑小区。目前，小区合并技术的应用主要涉及到基带小区合并系统和射频合并系统。
在射频合并技术中，参与小区合并的多个远端射频单元对基带只看成1个小区，只在操作维护面可看到多个射频单元，这种做法一方面减少了小区数目、节约了基带资源，同时，也解决了多个射频单元同频临区干扰问题有效地提升网络性能。
对于传统的基带小区合并系统或非小区合并系统而言，上行链路噪声系数比较小，功率控制按照第三代合作伙伴计划(3rd Generation Partnership Project，简称为3GPP)协议统一标准实施，在上行基本开环工作点可不考虑噪声系数对系统的影响，而且传统基带小区合并系统能够在接收到上行信号之后直接获取接收信号的信噪比。因此，在基带小区合并系统中，对上行发射功率的控制是直接根据获取到的信噪比，利用闭环功率控制对用户终端的发射功率进行准确校正。
但是闭环功率控制的方式在射频合并系统中却并不十分适用，这存在至少两方面的原因：首先，在射频合并系统中，上行链路通道噪声系数随合路个数的增加而增加，例如，在32个射频单元进行合并时，其噪声系数相较于不合并的情况增加了10*lg(32)，即15dB。因此，如果在此情况下，依然像基带小区合并系统中一样忽略噪声系数来进行初始上行发送功率的设置，那么该初始上行发送功率和实际期望的上行发送功率相差非 常大，即需要进行校正的差值就非常大。另一方面，在射频合并系统中，基带处理单元也可以获取信噪比的，只是初始工作点偏差比较大，会使调整时间变长。
发明内容
本发明要解决的主要技术问题是，提供一种上行发送功率控制策略，解决相关技术中，开环工作点非处于最优状态，而通过使用闭环功率控制策略对射频合并系统中的上行发送功率进行调整时，调整时间长、且调整不能一步到位的技术问题。
为解决上述技术问题，本发明提供一种功率控制方法，其特征在于，包括：
获取业务配置中进行小区合并的射频单元个数；
根据所述射频单元个数计算射频合并增益；
根据所述射频合并增益修正上行发送功率确定参数；
根据修正后的功率确定参数得到目标上行发送功率。
在本发明一种实施例中，所述功率确定参数包括用户终端功率基准参数和下行路径损耗中的至少一种。
在本发明一种实施例中，所述功率确定参数包括所述用户终端功率基准参数时，修正所述用户终端功率基准参数包括：
获取原始用户终端功率基准参数；
将所述原始用户终端功率基准参数与所述射频合并增益进行求和计算得到修正后的用户终端功率基准参数。
在本发明一种实施例中，根据修正后的用户终端功率基准参数得到目标上行发送功率包括：
根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为所述修正后的用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为用户终端测量下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
在本发明一种实施例中，所述功率确定参数包括所述下行路径损耗时,修正所述下行路径损耗包括：
获取用户终端接收参考信号的接收功率值；
获取所述参考信号的修正发射功率值，所述修正发射功率值为所述参考信号的实际发射功率值与所述射频合并增益之和；
根据所述接收功率值与所述修正发射功率值计算得到修正后的下行路径损耗。
在本发明一种实施例中，根据修正后的下行路径损耗得到目标上行发送功率包括：
根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为所述修正后的下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
在本发明一种实施例中，根据所述射频单元个数计算射频合并增益包括根据公式：
射频合并增益＝10*lg(N)，N为所述射频单元个数；
计算得到所述射频合并增益。
本发明还提供一种功率控制装置，包括：
射频合并获取单元，设置为获取业务配置中进行小区合并的射频单元个数；
合并增益计算单元，设置为根据所述射频单元个数计算射频合并增益；
参数修正单元，设置为根据所述射频合并增益修正上行发送功率确定参数；
发送功率确定单元，设置为根据修正后的功率确定参数得到目标上行发送功率。
在本发明一种实施例中，所述参数修正单元包括用户终端功率基准参数修正单元和下行路径损耗修正单元两个中的至少一个。
在本发明一种实施例中，所述用户终端功率基准参数修正单元设置为修正用户终端功率基准参数；其包括：
原始数据获取模块，设置为获取原始用户终端功率基准参数；
第一修正模块，设置为将所述原始用户终端功率基准参数与所述射频合并增益进行求和计算得到修正后的用户终端功率基准参数。
在本发明一种实施例中，所述发送功率确定单元包括第一功率计算模块，所述第一功率计算模块设置为根据修正后的用户终端功率基准参数得到目标上行发送功率，具体包括根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为所述修正后的用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为用户终端测量下行路径损耗；Δmcs为无线资源控制器 指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
在本发明一种实施例中，所述下行路径损耗修正单元设置为修正下行路径损耗，其包括：
接收功率值获取模块，设置为获取用户终端接收参考信号的接收功率值；
修正发射功率值获取模块，设置为获取所述参考信号的修正发射功率值，所述修正发射功率值为所述参考信号的实际发射功率值与所述射频合并增益之和；
第二修正模块，设置为根据所述接收功率值与所述修正发射功率值计算得到修正后的下行路径损耗。
在本发明一种实施例中，所述发送功率确定单元包括第二功率计算模块，所述第二功率计算模块设置为根据修正后的下行路径损耗得到目标上行发送功率，具体包括根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为所述修正后的下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
在本发明一种实施例中，所述合并增益计算单元根据所述射频单元个数计算射频合并增益包括根据公式：
射频合并增益＝10*lg(N)，N为所述射频单元个数；
计算得到所述射频合并增益。
本发明还提供一种基站，包括如上所述的功率控制装置。
本发明另一实施例提供了一种计算机存储介质，所述计算机存储介质存储有执行指令，所述执行指令用于执行上述实施例中的方法。
本发明的有益效果是：
采用本发明提供的上行发送功率控制方法，通过获取参与小区合并的射频单元个数来计算得到射频合并增益，然后根据该射频合并增益对上行发送功率确定参数进行相应的修改；由于修改上行发送功率确定参数时考虑了多个远端射频单元在合并时的热噪声，所以根据修改后的上行发送功率确定参数计算得到的目标上行发送功率更接近于期望的上行发送功率，从而省略了后续繁杂的调整过程，节省了功率控制过程的时间。
附图说明
图1为本发明实施例一提供的功率控制方法的一种流程图；
图2为本发明实施例一中修改用户终端功率基准参数的一种流程图；
图3为本发明实施例一中修改下行路径损耗的一种流程图；
图4为本发明实施例二提供的功率控制装置的一种示意图；
图5为图4中参数修正单元的一种示意图；
图6为图4中参数修正单元的另一种示意图；
图7为图4中参数修正单元的另一种示意图；
图8为图4中发送功率确定单元的一种示意图；
图9为图4中发送功率确定单元的另一种示意图；
图10为图4中发送功率确定单元的另一种示意图。
具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。
实施例一：
为了本发明的目的、技术方案和优点更加清楚，本实施例将结合附图对本发明提供的功率控制方法作进一步的说明，具体请参考图1：
S101，获取业务配置中进行小区合并的射频单元个数。
在非合并系统下，一个小区对应于一个远端射频单元，一个远端射频单元连接至一个基带处理单元上。但是合并技术支持同一个基带处理单元下的多个远端射频单元组成一个逻辑小区，也就是说其实在射频合并系统中，一个基带处理单元实际上是对应了多个远端射频单元的，这样做是为了减少小区数，从而有效降低干扰、提升网络性能。
在射频合并系统中，下行方向，由远汇聚单元将信号复制发送至多个远端射频单元上；上行方向，远端射频单元接收的信号在汇聚单元进行射频合并后，送往基带处理单元进行解调。由于在进行合并过程中，各远端射频单元天线口的热噪声线性叠加，例如，N个远端射频单元进行合并时，其噪声增益为10*lg(N)dB，相较于单远端射频单元情况中10*lg(1)dB(即0dB的热噪声增益)，其增加了10*lg(N)dB，也即信噪比恶化了10log(N)dB。要使在射频合并系统下，解调单元接收到的信号的信噪比达到与非合并系统中同样的解调门限，上行发送功率需要提升10log(N)dB。
所以为了得到正确的上行发送功率，必须要获取到进行小区合并的射频单元的个数，而获取一个射频合并系统下射频单元个数的方式有多种，在本实施例中，可以直接获取射频合并系统中远端射频单元的数目作为参与小区射频合并的射频单元个数。
S102，根据射频单元个数计算射频合并增益。
获取到某一射频合并系统中参与小区合并的射频单元个数后，可以直接根据公式：
射频合并增益＝10*lg(N)，N表示射频单元个数；
计算出射频合并增益的大小。
S103，根据射频合并增益修正上行发送功率确定参数。
S104，根据修正后的功率确定参数得到目标上行发送功率。
获取射频合并增益的直接目的是对上行发送功率确定参数进行修改，进而使得到的上行发送功率更接近期望值，在本实施例中，可以根据射频合并增益进行修改的参数至少包括用户终端功率基准参数和下行路径损耗两者中的一个，下面结合图2和图3分别对如何修改上面两种上行发送功率确定参数，并如何根据修改后得到的上行发送功率确定参数进一步计算得到目标上行发送功率进行详细说明。
当修改的上行发送功率确定参数为用户终端功率基准参数时，请结合图2：
S201，获取原始用户终端功率基准参数；
S202，将原始用户终端功率基准参数与射频合并增益进行求和计算得到修正后的用户终端功率基准参数。
原始用户特定参数由无线资源控制器(Radio Resource Control，简称为RRC)确定，该原始用户特定参数加上射频合并增益即得到修正后的用户终端功率基准参数。将小区功率基准参数与修正后的用户特定参数求和作为P0代入下面的公式，即可求得目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为所述修正后的用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为用户终端测量下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
当修改的上行发送功率确定参数为下行路径损耗时，请结合图3：
S301，获取用户终端接收参考信号的接收功率值；
S302，获取参考信号的修正发射功率值；
S303，根据接收功率值与修正发射功率值计算得到修正后的下行路径损耗。
原始下行路径损耗的计算根据分时长期演进(Time Division Long Term Evolution，简称为TD-LTE)功率控制协议的规定计算得到。基站通过广播的方式向用户终端发送参考信号，用户终端接收该参考信号，并计算基站发送的参考信号与用户终端接收到的参考信号的差值，该差值即为下行路径损耗。上述计算下行路径损耗是基于小区不进行射频合并的前提之下，而在小区射频合并的情况下，需要在得到的原始下行路径损耗的基础上射频合并增益影响，所以在求取目标上行发送功率之前，要对原始的下行路径损耗进行修正，获得修正后的下行路径损耗须考虑射频合并增益。在实际的实施过程中，为了得到修正后的下行路径损耗，比较常用的方式为：基带处理单元向用户终端发送一个功率为P0的参考信号RS，用户终端接收该参考信号RS，假设接收到的RS的功率为P0’，那么原始下行路径损耗的值为P0-P0’。但是在本实施例中，在计算下行路径损耗的时候，基带处理单元通过信令的方式告诉用户终端其发送的参考信号的发射功率值为P0与射频合并增益之和，可以理解的是，这里用户终端被告知的参考信号RS的发射功率的值实际上是修正发射功率值，为P0+10*lg(N)，RS的修正发射功率值比RS的实际发射功率的值大了10*lg(N)。通过这种方式，计算得到的下行路径损耗值为P0+10*lg(N)-P0’，比原始下行路径损耗增大了10*lg(N)。
将上述修正后的下行路径损耗作为PL代入下面的公式中，即可求得目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为所述修正后的下行路径损耗；Δmcs为无线资源控制器指定特定参 数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
在不进行射频合并的情况下，N＝1，所以，10*lg(N)＝0，此时依据本实施例提供的功率控制方法计算获得的射频单元发射增益为0。因此，虽然提出本实施例中的功率控制方法是为了解决射频合并系统中功率控制的问题，但事实上，该方法还具有兼容非合并系统的优点。
实施例二：
本实施例主要对本发明提供的功率控制装置进行详细的阐述。
如图4所示，本实施例中，功率控制装置40包括：射频合并获取单元401、合并增益计算单元402、参数修正单元403和发送功率确定单元404。
射频合并获取单元401设置为获取业务配置中进行射频合并的射频单元个数。
在非合并系统下，一个小区对应于一个远端射频单元，一个远端射频单元连接至一个基带处理单元上。由于合并技术支持同一个基带处理单元下的多个远端射频单元组成一个逻辑小区，也就是说其实在射频合并系统中，一个基带处理单元实际上是对应了多个小区和远端射频单元的，这样做是为了减少小区数，从而有效降低干扰、提升网络性能。
射频合并系统中，下行方向，由远汇聚单元将信号复制发送至多个远端射频单元上；上行方向，远端射频单元接收的信号在汇聚单元进行射频合并后，送往基带处理单元进行解调。由于在进行合并的过程中，各远端射频单元天线口的热噪声线性叠加，例如，N个远端射频单元进行合并时，其噪声增益为10*lg(N)dB，相较于单远端射频单元情况中10*lg(1)dB(即0dB的热噪声增益)，其增加了10*lg(N)dB，也即信噪比恶化了10*lg(N)dB。要使在射频合并系统下，解调单元接收到的信号的信噪比达到与非合并系统中同样的解调门限，上行发送功率需要提升10*lg(N)dB。
所以为了得到正确的上行发送功率，射频合并获取单元401就必须要 获取到进行小区合并的射频单元的个数，而获取一个射频合并系统下小区的个数的方式有多种，在本实施例中，射频合并获取单元401可以直接获取射频合并系统中远端射频单元的数目作为参与射频合并的射频单元个数。
合并增益计算单元402根据射频单元个数计算射频合并增益。射频合并获取单元401获取到某一射频合并系统中参与小区合并的射频单元的个数后，合并增益计算单元402可以直接根据公式：
射频合并增益＝10*lg(N)，N表示射频单元个数；
计算出射频合并增益的大小。
合并增益计算单元402获取射频合并增益的直接目的是让参数修正单元403对上行发送功率确定参数进行修改，进而使发送功率确定单元404得到的上行发送功率更接近期望值。
参数修正单元403，根据所述射频合并增益修正上行发送功率确定参数。参数修正单元403包括用户终端功率基准参数修正单元4031和下行路径损耗修正单元4032中的至少一个。
当参数修正单元403仅包括用户终端功率基准参数修正单元4031时，如图5，参数修正单元403先利用原始数据获取模块40311获取原始用户终端功率基准参数，原始用户特定参数由无线资源控制器(Radio Resource Control，简称为RRC)确定，然后第一修正模块40312设置为将原始用户终端功率基准参数与射频合并增益进行求和计算得到修正后的用户终端功率基准参数。
下行路径损耗的计算根据分时长期演进(Time Division Long Term Evolution，简称为TD-LTE)功率控制协议的规定计算得到。基站通过广播的方式向用户终端发送参考信号，用户终端接收该参考信号，并计算基站发送的参考信号与用户终端接收到的参考信号的差值，该差值即为下行路径损耗。上述计算下行路径损耗是基于小区不进行射频合并的前提之下，而在小区射频合并的情况下，需要在得到的原始下行路径损耗的基础 上进一步考虑射频合并增益影响，所以在求取目标上行发送功率之前，要对原始的下行路径损耗进行修正，获得修正后的下行路径损耗须考虑射频合并增益。
当参数修正单元403中仅包括下行路径损耗修正单元4032时，请参考图6所示的下行路径损耗修正单元4032，下行路径损耗修正单元4032包括接收功率值获取模块40321、修正发射功率值获取模块40322和第二修正模块40323，其中接收功率值获取模块40321设置为获取用户终端接收参考信号的接收功率值；修正发射功率值获取模块40322设置为获取参考信号的修正发射功率值；第二修正模块40323根据接收功率值与修正发射功率值计算得到修正后的下行路径损耗。
在实际的实施过程中，为了让第二修正模块40323根据接收功率值与修正发射功率值计算得到修正后的下行路径损耗，比较常用的方式为：基带处理单元向用户终端发送一个功率为P0的参考信号RS，用户终端接收该参考信号RS，假设接收到的RS的功率为P0’；那么原始下行路径损耗的值为P0-P0’，但在本实施例中，由于基带处理单元通过信令的方式告诉用户终端其发送的参考信号的发射功率值为P0与射频合并增益之和，可以理解的是，这里用户终端得到的RS的发射功率的值实际上是修正发射功率值，该修正发射功率值比RS的实际发射功率的值大了10*lg(N)，即修正发射功率值获取模块40322获取到的修正发射功率值为P0+10*lg(N)，接收功率值获取模块40321获取到的用户终端接收参考信号的接收功率值为P0’，这时，第二修正模块40323计算得到的下行路径损耗值为P0+10*lg(N)-P0’，比原始下行路径损耗增大了10*lg(N)，这也就是修正后的下行路径损耗。
当参数修正单元403包括用户终端功率基准参数修正单元4031时，发送功率确定单元404至少包括第一功率计算模块4041，请进一步结合图8，第一功率计算模块4041将小区功率基准参数与修正后的用户特定参数求和作为P0代入下面的公式，即可求得目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为所述修正后的用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为用户终端测量下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
当参数修正单元403包括下行路径损耗修正单元4032时，请参考图9，发送功率确定单元404至少包括第二功率计算模块4042，第二功率计算模块4042将上述修正后的下行路径损耗作为PL代入下面的公式中，即可求得目标上行发送功率：
P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为所述修正后的下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
可以理解的是，上述参数修正单元403可以同时包含用户终端功率基准参数修正单元4031和下行路径损耗修正单元4032，如图7。同样的，发送功率确定单元404可以同时包括第一功率计算模块4041和第二功率计算模块4042，如图10。
在不进行射频合并的情况下，N＝1，所以，10*lg(N)＝0，因此，本实施例提供的功率控制装置应用在非合并系统时，计算获得的下行发射增益为0。因此，虽然提出本实施例中的功率控制装置40同样适用于控制非合并系统中的上行发射功率。
本实施例提供的功率控制装置40可以设置在基站、用户终端或者任 何第三方设备上，对用户终端的上行发送功率进行控制。
实施例三：
本实施例提供一种基站，该基站包括实施例二中的功率控制装置。
由于基站包含上述功率控制装置，所以该基站在确定了上行发送功率之后，会将功率的信息发送给用户终端，让用户终端根据其确定的上行发送功率向终端发送信息。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。
工业实用性
如上所述，本发明实施例提供的一种功率控制方法、装置及基站具有以下有益效果：通过获取参与小区合并的射频单元个数来计算得到射频合并增益，然后根据该射频合并增益对上行发送功率确定参数进行相应的修改；由于修改上行发送功率确定参数时考虑了多个远端射频单元在合并时的热噪声，所以根据修改后的上行发送功率确定参数计算得到的目标上行发送功率更接近于期望的上行发送功率，从而省略了后续繁杂的调整过程，节省了功率控制过程的时间。

Claims (15)

  1. 一种功率控制方法，包括：
    获取业务配置中进行小区合并的射频单元个数；
    根据所述射频单元个数计算射频合并增益；
    根据所述射频合并增益修正上行发送功率确定参数；
    根据修正后的功率确定参数得到目标上行发送功率。
  2. 如权利要求1所述的功率控制方法，其中，所述功率确定参数包括用户终端功率基准参数和下行路径损耗中的至少一种。
  3. 如权利要求2所述的功率控制方法，其中，所述功率确定参数包括所述用户终端功率基准参数时，修正所述用户终端功率基准参数包括：
    获取原始用户终端功率基准参数；
    将所述原始用户终端功率基准参数与所述射频合并增益进行求和计算得到修正后的用户终端功率基准参数。
  4. 如权利要求3所述的功率控制方法，其中，根据修正后的用户终端功率基准参数得到目标上行发送功率包括：
    根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
    P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
    P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为所述修正后的用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为用户终端测量下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层 给出的函数。
  5. 如权利要求2所述的功率控制方法，其中，所述功率确定参数包括所述下行路径损耗时,修正所述下行路径损耗包括：
    获取用户终端接收参考信号的接收功率值；
    获取所述参考信号的修正发射功率值，所述修正发射功率值为所述参考信号的实际发射功率值与所述射频合并增益之和；
    根据所述接收功率值与所述修正发射功率值计算得到修正后的下行路径损耗。
  6. 如权利要求5所述的功率控制方法，其中，根据修正后的下行路径损耗得到目标上行发送功率包括：
    根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
    P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
    P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为所述修正后的下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
  7. 如权利要求1-6任一项所述的功率控制方法，其中，根据所述射频单元个数计算射频合并增益包括根据公式：
    射频合并增益＝10*lg(N),N为所述射频单元个数；
    计算得到所述射频合并增益。
  8. 一种功率控制装置，包括：
    射频合并获取单元，设置为获取业务配置中进行小区合并的射频 单元个数；
    合并增益计算单元，设置为根据所述射频单元个数计算射频合并增益；
    参数修正单元，设置为根据所述射频合并增益修正上行发送功率确定参数；
    发送功率确定单元，设置为根据修正后的功率确定参数得到目标上行发送功率。
  9. 如权利要求8所述的功率控制装置，其中，所述参数修正单元包括用户终端功率基准参数修正单元和下行路径损耗修正单元两个中的至少一个。
  10. 如权利要求9所述的功率控制装置，其中，所述用户终端功率基准参数修正单元设置为修正用户终端功率基准参数；其包括：
    原始数据获取模块，设置为获取原始用户终端功率基准参数；
    第一修正模块，设置为将所述原始用户终端功率基准参数与所述射频合并增益进行求和计算得到修正后的用户终端功率基准参数。
  11. 如权利要求10所述的功率控制装置，其中，所述发送功率确定单元包括第一功率计算模块，所述第一功率计算模块设置为根据修正后的用户终端功率基准参数得到目标上行发送功率，具体包括根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
    P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
    P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为所述修正后的用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为用户终端测量下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏 移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
  12. 如权利要求9所述的功率控制装置，其中，所述下行路径损耗修正单元设置为修正下行路径损耗，其包括：
    接收功率值获取模块，设置为获取用户终端接收参考信号的接收功率值；
    修正发射功率值获取模块，设置为获取所述参考信号的修正发射功率值，所述修正发射功率值为所述参考信号的实际发射功率值与所述射频合并增益之和；
    第二修正模块，设置为根据所述接收功率值与所述修正发射功率值计算得到修正后的下行路径损耗。
  13. 如权利要求12所述的功率控制装置，其中，所述发送功率确定单元包括第二功率计算模块，所述第二功率计算模块设置为根据修正后的下行路径损耗得到目标上行发送功率，具体包括根据如下所示的上行发送功率计算公式得到所述目标上行发送功率：
    P＝min{Pmax,10logM+P0+αPL+Δmcs+f(Δi)}；
    P为目标上行发送功率；Pmax为用户终端的最大发射功率；M为分配给该用户终端的上行资源快数量；P0表示半静态功率基准，为用户终端功率基准参数与小区功率基准参数之和；α为小区特定的路径损耗补偿系数；PL为所述修正后的下行路径损耗；Δmcs为无线资源控制器指定特定参数，是与编码速率和调制方式对应的偏移量；Δi为小区特定的发射功率控制闭环修正系数；f(x)表示由高层给出的函数。
  14. 如权利要求8-13任一项所述的功率控制装置，其中，所述噪声增益计算单元根据所述射频单元个数计算射频合并增益包括根据公式：
    射频合并增益＝10*lg(N),N为所述射频单元个数；
    计算得到所述射频合并增益。
  15. 一种基站，包括如权利要求8-14任一项所述的功率控制装置。
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