WO2017118098A1 - Cell common reference signal sending method and apparatus, and base station - Google Patents

Cell common reference signal sending method and apparatus, and base station Download PDF

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Publication number
WO2017118098A1
WO2017118098A1 PCT/CN2016/099532 CN2016099532W WO2017118098A1 WO 2017118098 A1 WO2017118098 A1 WO 2017118098A1 CN 2016099532 W CN2016099532 W CN 2016099532W WO 2017118098 A1 WO2017118098 A1 WO 2017118098A1
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Prior art keywords
power
reference signal
common reference
cell
normalized
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PCT/CN2016/099532
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French (fr)
Chinese (zh)
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袁红峰
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中兴通讯股份有限公司
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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
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3827—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using only the demodulated baseband signals
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a base station for transmitting a common reference signal of a cell.
  • LTE Long Term Evolution
  • the data transmission power of the base station is a very important factor. If the power is too small, the signal-to-noise ratio of the user equipment is too low, which affects data demodulation. The higher the power of the transmitted data, the greater the interference to the adjacent cell. Data demodulation of user equipment in the area.
  • the size of the base station transmit power is based on CRS (cell reference signal).
  • the LTE protocol stipulates that the transmit power of all physical layer channels and physical signals is based on CRS. After determining the power of the cell reference signal, other physical signals determine the transmit power of the physical signal by using the power offset.
  • the size of the cell reference signal is also directly related to the user equipment estimating the path loss of the wireless channel. Therefore, how to accurately transmit a cell reference signal at a suitable power in downlink data of a base station is an urgent problem to be solved in the art.
  • the technical problem to be solved by the present invention is to provide a method, a device, and a base station for transmitting a common reference signal of a cell, which are used to solve the problem that it is difficult to accurately transmit a cell reference signal with an appropriate power in downlink data of a base station in the prior art.
  • the present invention provides a method for transmitting a common reference signal of a cell, including: determining a normalized common reference signal power of a cell; and generating a baseband digital signal according to the normalized common reference signal power of the cell, the baseband The power of the digital signal is the maximum power allowed by the baseband digital signal; the baseband digital signal is converted into an analog signal and power adjusted and sent to the air interface.
  • E_RS is normalized to the normalized cell common reference signal power
  • P B is the B-type OFDM (Orthogonal Frequency Division Multiplexing) symbol power in the Long Term Evolution LTE frequency domain resource block.
  • the index of the class A orthogonal frequency division multiplexing OFDM symbol power ratio, RBNum is the number of bandwidth resource blocks of the LTE system.
  • S rs2 S rs1 ⁇ 2 (E_RS normalized + P IRDBFS ) / 20 ;
  • S rs1 is the common reference signal before weighting
  • S rs2 is the weighted common reference signal
  • P IRDBFS is the base interface Ir interface (Open Interface between the RRU and The BBU, the open BBU and RRU interface) the maximum digital power agreed upon.
  • the method further includes: detecting whether a maximum transmit power of the cell is less than a base station rated power; determining the normalized cell common reference signal power includes: When the maximum transmit power of the cell is less than the rated power of the base station, the normalized common reference signal power of the cell is determined.
  • the detecting whether the maximum transmit power of the cell is less than the rated power of the base station includes: detecting whether the P cell max is smaller than the P base ; wherein, the P cell max is the maximum transmit power of the cell,
  • P cell max 12 ⁇ RBNum ⁇ 10 E_RS/10 ⁇ PortNum/(P B +1)
  • P base is the base station rated power
  • E_RS is the cell common reference signal power
  • P B is the class B OFDM symbol in the LTE frequency domain resource block.
  • An index associated with the power ratio of the class A OFDM symbol, RBNum is the number of bandwidth resource blocks of the LTE system, and PortNum is the number of LTE antenna ports.
  • the present invention further provides a device for transmitting a common reference signal of a cell, comprising: a determining unit, configured to determine a normalized common reference signal power of the cell; and a generating unit, configured to use the normalized cell common reference according to the normalized cell Signal power, generating a baseband digital signal, the power of the baseband digital signal being allowed by the baseband digital signal Maximum power; an adjustment and transmission unit for converting the baseband digital signal into an analog signal and performing power adjustment and transmitting to the air interface.
  • the determining unit is specifically configured to: determine the normalized cell common reference signal power according to the following formula:
  • E_RS normalized 10 ⁇ lg ((P B +1)/12/RBNum);
  • the E_RS is a normalized common reference signal power of the cell
  • the P B is an index associated with the power ratio of the class B OFDM symbol in the LTE frequency domain resource block and the power ratio of the class A OFDM symbol
  • the RBNum is the number of bandwidth resource blocks of the LTE system.
  • the generating unit is specifically configured to:
  • S rs1 is the common reference signal before weighting
  • S rs2 is the weighted common reference signal
  • P IRDBFS is the maximum digital power agreed by the Open Interface between the RRU and the BBU (open BBU and RRU interface).
  • the P base is the base station rated power
  • the E_RS is the cell common reference signal power
  • the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block
  • the RBNum is the LTE system bandwidth resource block number. PortNum is the number of LTE antenna ports.
  • the present invention also provides a base station, including a transmitting apparatus for a common reference signal of any medium provided by the present invention.
  • the method, device and base station for transmitting a common reference signal of a cell are capable of determining a normalized common reference signal power of a cell, and generating a baseband digital signal according to the normalized common reference signal power of the cell, and then generating a baseband digital signal, and then Converting the baseband digital signal into an analog signal and performing power adjustment and transmitting to the air interface.
  • the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.
  • FIG. 1 is a flowchart of a method for transmitting a common reference signal of a cell according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a device for transmitting a common reference signal of a cell according to an embodiment of the present invention.
  • an embodiment of the present invention provides a method for sending a common reference signal of a cell, including:
  • the method for transmitting a common reference signal of a cell is capable of determining a normalized common reference signal power of a cell, and generating a baseband digital signal according to the normalized common reference signal power of the cell, and then using the baseband The digital signal is converted into an analog signal and adjusted for power and sent to the air interface.
  • the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.
  • determining the normalized cell common reference signal power may include:
  • the normalized cell common reference signal power is determined according to the following formula:
  • E_RS normalization 10 ⁇ lg ((P B +1) / 12 / RBNum) (1)
  • E_RS is normalized to a normalized cell common reference signal power
  • P B is an index associated with a class B OFDM symbol power and a class A orthogonal frequency division multiplexing OFDM symbol power ratio in a Long Term Evolution LTE frequency domain resource block, RBNum The number of bandwidth resource blocks for the LTE system.
  • the formula (1) can be obtained as follows.
  • the optimal PA parameters under different PBs can be traversed in different cell port numbers. Taking the two ports of the cell as an example, the following relationship needs to be satisfied:
  • RBNum ⁇ 12 represents the number of resource units of all PDSCHs in the class A OFDM symbol.
  • E_RS normalization 10 ⁇ lg (1/12 / RBNum) -PA (5)
  • Equation (1) Since P A is a UE-level parameter, the actual UE P A parameters may all be the same, so by bringing equation (3) into equation (5), equation (1) can be obtained.
  • a baseband digital signal may be generated according to the normalized cell common reference signal power.
  • the baseband digital signal can be generated according to the full-scale principle.
  • the frequency domain signal power of the normalized cell common reference signal may be specifically weighted according to the following formula:
  • S rs1 is the common reference signal before weighting
  • S rs2 is the weighted common reference signal
  • P IRDBFS is the maximum digital power agreed by the Open Interface between the RRU and the BBU (open BBU and RRU interface).
  • the baseband digital signal After the baseband digital signal is generated, the baseband digital signal can be converted into an analog signal and power adjusted and then sent to the air interface in step S13. Specifically, since the baseband digital signal is generated by using the principle of full power in step S12, the power has reached the maximum, so it needs to be adjusted after a certain power and then sent to the air interface.
  • the baseband digital signal may be converted into an analog signal and subjected to power attenuation and then sent to the air interface, and the power attenuation coefficient ⁇ satisfies the following formula:
  • the P base is the base station rated power
  • the E_RS is the cell common reference signal power
  • the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block
  • the RBNum is the LTE system bandwidth resource block number.
  • PortNum is the number of LTE antenna ports. 10 ⁇ lg((P B +1) ⁇ P base /PortNum /12/RBNum) represents the maximum value of the maximum configurable cell common reference signal power calculated according to the rated power of the base station, and the calculation method is the same as before
  • E_RS is the cell common reference signal power configured by the actual user.
  • the baseband signal can be converted, filtered, and RF filtered by the RF module of the base station, and then transmitted to the antenna feeder system by the linear power amplifier, and the signal can be power-decayed when filtering the wave.
  • multiple cell power parameters such as E_RS, P B , PortNum, etc., are used when determining the cell common reference signal power, and the cell common reference signal can be transmitted more accurately when these power parameters are properly set. .
  • the method for transmitting the common reference signal of the cell before determining the normalized common reference signal power of the cell, the method for transmitting the common reference signal of the cell further includes: detecting whether the maximum transmit power of the cell is Less than the rated power of the base station.
  • determining the normalized cell common reference signal power includes determining a normalized cell common reference signal power if the maximum transmit power of the cell is less than the base station rated power. When the maximum transmit power of the cell is greater than the rated power of the base station, the base station may issue an unreasonable alarm for configuring the power parameter.
  • detecting whether the maximum transmit power of the cell is less than the rated power of the base station may include: detecting whether P cell max is smaller than P base ;
  • P cell max is the maximum transmit power of the cell
  • P base is the rated power of the base station
  • E_RS is the common reference signal power of the cell
  • P B is the index associated with the power ratio of the class B OFDM symbol and the class A OFDM symbol power in the LTE frequency domain resource block
  • RBNum is the number of bandwidth resource blocks of the LTE system
  • PortNum is the number of LTE antenna ports.
  • an embodiment of the present invention further provides a device for transmitting a common reference signal of a cell, including:
  • a determining unit 21 configured to determine a normalized cell common reference signal power
  • the generating unit 22 is configured to generate a baseband digital signal according to the normalized cell common reference signal power, where the power of the baseband digital signal is the maximum power allowed by the baseband digital signal;
  • the adjusting and transmitting unit 23 is configured to convert the baseband digital signal into an analog signal and perform power adjustment and then send the signal to the air interface.
  • the determining unit 21 can determine the normalization The cell common reference signal power
  • the generating unit 22 is capable of generating a baseband digital signal according to the normalized cell common reference signal power
  • the adjusting and transmitting unit 23 can convert the baseband digital signal into an analog signal and perform power adjustment. After sending to the air interface. In this way, since the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.
  • the determining unit 21 is specifically configured to:
  • the normalized cell common reference signal power is determined according to the following formula:
  • E_RS normalization 10 ⁇ lg ((P B +1) / 12 / RBNum) (1)
  • the E_RS is a normalized common reference signal power of the cell
  • the P B is an index associated with the power ratio of the class B OFDM symbol in the LTE frequency domain resource block and the power ratio of the class A OFDM symbol
  • the RBNum is the number of bandwidth resource blocks of the LTE system.
  • the generating unit 22 is specifically configured to: weight the frequency domain signal power of the normalized cell common reference signal according to the following formula:
  • S rs1 is the common reference signal power before weighting
  • S rs2 is the weighted common reference signal power
  • P IRDBFS is the maximum digital power of the infrared interface of the base station.
  • the adjusting and transmitting unit 23 is specifically configured to: convert the baseband digital signal into an analog signal, perform power attenuation, and then send the signal to the air interface, where the power attenuation coefficient ⁇ satisfies the following relationship:
  • the P base is the base station rated power
  • the E_RS is the cell common reference signal power
  • the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block
  • the RBNum is the LTE system bandwidth resource block number. PortNum is the number of LTE antenna ports.
  • the embodiment of the present invention further provides a base station, which includes any one of the cell common reference signal sending devices provided by the foregoing embodiments, and thus can achieve corresponding technical effects.
  • a base station which includes any one of the cell common reference signal sending devices provided by the foregoing embodiments, and thus can achieve corresponding technical effects.
  • Each module or unit in the transmitting device of the cell common reference signal provided by the embodiment of the present application may pass through one or more digital signal processors (DSPs), application specific integrated circuits (ASICs), processors, microprocessors, controllers, Implemented by a microcontroller, field programmable array (FPGA), programmable logic device, or other electronic unit, or any combination thereof.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • processors microprocessors
  • controllers Implemented by a microcontroller, field programmable array (FPGA), programmable logic device, or other electronic unit, or any combination thereof.
  • FPGA field programmable array
  • programmable logic device or other electronic unit, or any combination thereof.
  • an embodiment of the present invention further provides a sending apparatus for a common reference signal of a cell, for example, the apparatus may be applied to a base station, including:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • the method and apparatus of the present application are applicable to the field of communications, and are mainly applicable to a base station to accurately transmit a cell reference signal with an appropriate power.
  • the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.

Abstract

Disclosed are a cell common reference signal sending method and apparatus, and a base station, relating to the technical field of communications and used for solving the problem in the prior art of having difficulty in accurately sending a cell reference signal at an appropriate power in downlink data of a base station. The method comprises: determining a normalized cell common reference signal power; according to the normalized cell common reference signal power, generating a baseband digital signal, wherein the power of the baseband digital signal is the maximum power allowed for the baseband digital signal; and converting the baseband digital signal into an analogue signal and sending same to an air interface after performing power adjustment.

Description

一种小区公共参考信号的发送方法、装置及基站Method, device and base station for transmitting common reference signal of cell
本申请基于申请号为CN 201610003659.1、申请日为2016年1月4日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。The present application is filed on the basis of the Chinese Patent Application No. WO 201610003659.1, filed on Jan. 4, 2016, the entire disclosure of which is hereby incorporated by reference.
技术领域Technical field
本发明涉及通讯技术领域，特别是涉及一种小区公共参考信号的发送方法、装置及基站。The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a base station for transmitting a common reference signal of a cell.
背景技术Background technique
LTE(Long Term Evolution，长期演进)技术是当前主流的通信方式。基站发射数据功率大小是一个很重要的因素，功率太小则用户设备受到数据的信噪比太低，影响数据解调；发射数据功率越大则会对临小区产生较大的干扰，影响临区用户设备的数据解调。基站发射功率的大小以CRS(cell Reference Signal，小区公共参考信号)为基础。LTE (Long Term Evolution) technology is the current mainstream communication method. The data transmission power of the base station is a very important factor. If the power is too small, the signal-to-noise ratio of the user equipment is too low, which affects data demodulation. The higher the power of the transmitted data, the greater the interference to the adjacent cell. Data demodulation of user equipment in the area. The size of the base station transmit power is based on CRS (cell reference signal).
LTE协议中规定，所有物理层信道和物理信号的发射功率大小均以CRS为标准，在确定小区参考信号功率后，其他物理信号均在此基础上通过功率偏移确定该物理信号的发射功率。小区参考信号的大小还直接关系着用户设备估计无线信道的路损。因此，如何在基站下行数据中将小区参考信号以合适的功率准确发送是本领域亟待解决的问题。The LTE protocol stipulates that the transmit power of all physical layer channels and physical signals is based on CRS. After determining the power of the cell reference signal, other physical signals determine the transmit power of the physical signal by using the power offset. The size of the cell reference signal is also directly related to the user equipment estimating the path loss of the wireless channel. Therefore, how to accurately transmit a cell reference signal at a suitable power in downlink data of a base station is an urgent problem to be solved in the art.
发明内容Summary of the invention
本发明要解决的技术问题是提供一种小区公共参考信号的发送方法、装置及基站，用以解决现有技术基站下行数据中难以将小区参考信号以合适的功率准确发送的问题。The technical problem to be solved by the present invention is to provide a method, a device, and a base station for transmitting a common reference signal of a cell, which are used to solve the problem that it is difficult to accurately transmit a cell reference signal with an appropriate power in downlink data of a base station in the prior art.
一方面，本发明提供一种小区公共参考信号的发送方法，包括：确定归一化的小区公共参考信号功率；根据所述归一化的小区公共参考信号功率，生成基带数字信号，所述基带数字信号的功率为基带数字信号所允许的最大功率；将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。 In one aspect, the present invention provides a method for transmitting a common reference signal of a cell, including: determining a normalized common reference signal power of a cell; and generating a baseband digital signal according to the normalized common reference signal power of the cell, the baseband The power of the digital signal is the maximum power allowed by the baseband digital signal; the baseband digital signal is converted into an analog signal and power adjusted and sent to the air interface.
可选的，所述确定归一化的小区公共参考信号功率包括：根据如下公式确定所述归一化的小区公共参考信号功率：E_RS归一＝10·lg((PB+1)/12/RBNum)；其中，E_RS归一为归一化的小区公共参考信号功率，PB为长期演进LTE频域资源块中B类OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号功率和A类正交频分复用OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数。Optionally, the determining the normalized cell common reference signal power comprises: determining the normalized cell common reference signal power according to the following formula: E_RS normalization =10·lg((P B +1)/12 /RBNum); where E_RS is normalized to the normalized cell common reference signal power, and P B is the B-type OFDM (Orthogonal Frequency Division Multiplexing) symbol power in the Long Term Evolution LTE frequency domain resource block. The index of the class A orthogonal frequency division multiplexing OFDM symbol power ratio, RBNum is the number of bandwidth resource blocks of the LTE system.
可选的，所述根据所述归一化的小区公共参考信号功率，生成基带数字信号包括：根据如下公式对所述归一化的小区公共参考信号的频域信号功率进行加权：Srs2＝Srs1·2(E_RS 归一 +P IRDBFS )/20；其中，Srs1为加权前的公共参考信号，Srs2为加权后的公共参考信号，PIRDBFS为基站Ir接口(Open Interface between the RRU and the BBU，开放的BBU与RRU接口)约定的最大数字功率。Optionally, the generating the baseband digital signal according to the normalized cell common reference signal power comprises: weighting the frequency domain signal power of the normalized cell common reference signal according to the following formula: S rs2 = S rs1 · 2 (E_RS normalized + P IRDBFS ) / 20 ; where S rs1 is the common reference signal before weighting, S rs2 is the weighted common reference signal, and P IRDBFS is the base interface Ir interface (Open Interface between the RRU and The BBU, the open BBU and RRU interface) the maximum digital power agreed upon.
可选的，所述确定归一化的小区公共参考信号功率之前，所述方法还包括：检测小区最大发射功率是否小于基站额定功率；所述确定归一化的小区公共参考信号功率包括：在所述小区最大发射功率小于基站额定功率的情况下，确定归一化的小区公共参考信号功率。Optionally, before the determining the normalized cell common reference signal power, the method further includes: detecting whether a maximum transmit power of the cell is less than a base station rated power; determining the normalized cell common reference signal power includes: When the maximum transmit power of the cell is less than the rated power of the base station, the normalized common reference signal power of the cell is determined.
可选的，所述检测小区最大发射功率是否小于基站额定功率包括：检测Pcell max是否小于Pbase；其中，Pcell max为小区最大发射功率，Optionally, the detecting whether the maximum transmit power of the cell is less than the rated power of the base station includes: detecting whether the P cell max is smaller than the P base ; wherein, the P cell max is the maximum transmit power of the cell,
Pcell max＝12·RBNum·10E_RS/10·PortNum/(PB+1)，Pbase为基站额定功率，E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。P cell max =12·RBNum·10 E_RS/10 ·PortNum/(P B +1), P base is the base station rated power, E_RS is the cell common reference signal power, and P B is the class B OFDM symbol in the LTE frequency domain resource block. An index associated with the power ratio of the class A OFDM symbol, RBNum is the number of bandwidth resource blocks of the LTE system, and PortNum is the number of LTE antenna ports.
可选的，所述将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口包括：将所述基带数字信号转化成模拟信号并进行功率衰减后发送到空口，功率衰减系数α＝10·lg((PB+1)·Pbase/PortNum/12/RBNum)-E_RS；其中，Pbase为基站额定功率，E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。Optionally, the converting the baseband digital signal into an analog signal and performing power adjustment and then transmitting the signal to the air interface comprises: converting the baseband digital signal into an analog signal, performing power attenuation, and transmitting the signal to the air interface, and the power attenuation coefficient α= 10·lg((P B +1)·P base /PortNum/12/RBNum)-E_RS; where P base is the base station rated power, E_RS is the cell common reference signal power, and P B is the LTE frequency domain resource block B An index associated with a power ratio of a class OFDM symbol and a class A OFDM symbol, RBNum is the number of bandwidth resource blocks of the LTE system, and PortNum is the number of LTE antenna ports.
相应的，本发明还提供一种小区公共参考信号的发送装置，包括：确定单元，用于确定归一化的小区公共参考信号功率；生成单元，用于根据所述归一化的小区公共参考信号功率，生成基带数字信号，所述基带数字信号的功率为基带数字信号所允许 的最大功率；调整和发送单元，用于将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。Correspondingly, the present invention further provides a device for transmitting a common reference signal of a cell, comprising: a determining unit, configured to determine a normalized common reference signal power of the cell; and a generating unit, configured to use the normalized cell common reference according to the normalized cell Signal power, generating a baseband digital signal, the power of the baseband digital signal being allowed by the baseband digital signal Maximum power; an adjustment and transmission unit for converting the baseband digital signal into an analog signal and performing power adjustment and transmitting to the air interface.
可选的，所述确定单元，具体用于：根据如下公式确定所述归一化的小区公共参考信号功率：Optionally, the determining unit is specifically configured to: determine the normalized cell common reference signal power according to the following formula:
E_RS归一＝10·lg((PB+1)/12/RBNum)；E_RS normalized = 10·lg ((P B +1)/12/RBNum);
其中，E_RS归一为归一化的小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数。The E_RS is a normalized common reference signal power of the cell, and the P B is an index associated with the power ratio of the class B OFDM symbol in the LTE frequency domain resource block and the power ratio of the class A OFDM symbol, and the RBNum is the number of bandwidth resource blocks of the LTE system.
可选的，所述生成单元，具体用于：Optionally, the generating unit is specifically configured to:
根据如下公式对所述归一化的小区公共参考信号的频域信号功率进行加权：Srs2＝Srs1·2(E_RS 归一 +P IRDBFS )/20；The frequency domain signal power of the normalized cell common reference signal is weighted according to the following formula: S rs2 = S rs1 · 2 (E_RS normalized + P IRDBFS ) / 20 ;
其中，Srs1为加权前的公共参考信号，Srs2为加权后的公共参考信号，PIRDBFS为基站Ir接口(Open Interface between the RRU and the BBU，开放的BBU与RRU接口)约定的最大数字功率。Where S rs1 is the common reference signal before weighting, S rs2 is the weighted common reference signal, and P IRDBFS is the maximum digital power agreed by the Open Interface between the RRU and the BBU (open BBU and RRU interface). .
可选的，所述调整和发送单元，具体用于：将所述基带数字信号转化成模拟信号并进行功率衰减后发送到空口，功率衰减系数α＝10·lg((PB+1)·Pbase/PortNum/12/RBNum)-E_RS；Optionally, the adjusting and transmitting unit is specifically configured to: convert the baseband digital signal into an analog signal, perform power attenuation, and then send the signal to the air interface, and the power attenuation coefficient is α=10·lg ((P B +1)· P base /PortNum/12/RBNum)-E_RS;
其中，Pbase为基站额定功率，E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。The P base is the base station rated power, the E_RS is the cell common reference signal power, and the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block, and the RBNum is the LTE system bandwidth resource block number. PortNum is the number of LTE antenna ports.
另一方面，本发明还提供一种基站，包括本发明提供的任一中小区公共参考信号的发送装置。In another aspect, the present invention also provides a base station, including a transmitting apparatus for a common reference signal of any medium provided by the present invention.
本发明实施例提供的小区公共参考信号的发送方法、装置及基站，能够确定归一化的小区公共参考信号功率，并根据所述归一化的小区公共参考信号功率，生成基带数字信号，然后将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。这样，由于采用最大功率的原则生成基带小区参考信号，保证了基带信号的数字精度，使小区公共参考信号的功率能够更准确地分配在下行数据中。The method, device and base station for transmitting a common reference signal of a cell according to an embodiment of the present invention are capable of determining a normalized common reference signal power of a cell, and generating a baseband digital signal according to the normalized common reference signal power of the cell, and then generating a baseband digital signal, and then Converting the baseband digital signal into an analog signal and performing power adjustment and transmitting to the air interface. In this way, since the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.
附图说明DRAWINGS
图1是本发明实施例提供的小区公共参考信号的发送方法的一种流程图； 1 is a flowchart of a method for transmitting a common reference signal of a cell according to an embodiment of the present invention;
图2是本发明实施例提供的小区公共参考信号的发送装置的一种结构示意图。FIG. 2 is a schematic structural diagram of a device for transmitting a common reference signal of a cell according to an embodiment of the present invention.
具体实施方式detailed description
以下结合附图对本发明进行详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不限定本发明。The invention will be described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
如图1所示，本发明实施例提供一种小区公共参考信号的发送方法，包括：As shown in FIG. 1 , an embodiment of the present invention provides a method for sending a common reference signal of a cell, including:
S11，确定归一化的小区公共参考信号功率；S11, determining a normalized cell common reference signal power;
S12，根据所述归一化的小区公共参考信号功率，生成基带数字信号，所述基带数字信号的功率为基带数字信号所允许的最大功率；S12. Generate a baseband digital signal according to the normalized cell common reference signal power, where the power of the baseband digital signal is a maximum power allowed by the baseband digital signal;
S13，将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。S13. Convert the baseband digital signal into an analog signal, perform power adjustment, and send the signal to the air interface.
本发明实施例提供的小区公共参考信号的发送方法，能够确定归一化的小区公共参考信号功率，并根据所述归一化的小区公共参考信号功率，生成基带数字信号，然后将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。这样，由于采用最大功率的原则生成基带小区参考信号，保证了基带信号的数字精度，使小区公共参考信号的功率能够更准确地分配在下行数据中。The method for transmitting a common reference signal of a cell according to an embodiment of the present invention is capable of determining a normalized common reference signal power of a cell, and generating a baseband digital signal according to the normalized common reference signal power of the cell, and then using the baseband The digital signal is converted into an analog signal and adjusted for power and sent to the air interface. In this way, since the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.
具体而言，在步骤S11中，确定归一化的小区公共参考信号功率可包括：Specifically, in step S11, determining the normalized cell common reference signal power may include:
根据如下公式确定所述归一化的小区公共参考信号功率：The normalized cell common reference signal power is determined according to the following formula:
E_RS归一＝10·lg((PB+1)/12/RBNum)    (1)E_RS normalization = 10 · lg ((P B +1) / 12 / RBNum) (1)
其中，E_RS归一为归一化的小区公共参考信号功率，PB为长期演进LTE频域资源块中B类OFDM符号功率和A类正交频分复用OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数。Wherein, E_RS is normalized to a normalized cell common reference signal power, and P B is an index associated with a class B OFDM symbol power and a class A orthogonal frequency division multiplexing OFDM symbol power ratio in a Long Term Evolution LTE frequency domain resource block, RBNum The number of bandwidth resource blocks for the LTE system.
公式(1)可以根据如下方法得到。The formula (1) can be obtained as follows.
根据A类OFDM和B类OFDM符号上发射功率相等的原则，可以在不同的小区端口数情况下遍历不同PB下最佳的PA参数，以小区两端口为例，需要满足如下关系式：According to the principle that the transmit powers of the A-type OFDM and the B-type OFDM symbols are equal, the optimal PA parameters under different PBs can be traversed in different cell port numbers. Taking the two ports of the cell as an example, the following relationship needs to be satisfied:
10PA/10×12＝2+x×10PA/10×8    (2)10 PA/10 ×12=2+x×10 PA/10 ×8 (2)
(2)式等号左边表示A类符号的能量，一个RB中有12个PDSCH的RE，因此乘以12。等号右边表示B类符号的能量，在一个RB的12个RE中，有2个是CRS，2个是空，8个是PDSCH的RE。x为B类OFDM符号功率和A类正交频分复用OFDM 符号功率比值。假设此时E_RS＝1，x＝1.25,1,0.75,0.5分别对应PB＝0,1,2,3。分别代入公式(2)后，可分别计算得到PA＝0db，-3db，-4.77dB,-6dB。从而得出PB和PA满足关系：(2) The left side of the equation indicates the energy of the class A symbol, and there are 12 PDSCH REs in one RB, so multiply by 12. The right side of the equal sign indicates the energy of the class B symbol. Among the 12 REs of one RB, two are CRS, two are empty, and eight are REs of the PDSCH. x is a class B OFDM symbol power and a class A orthogonal frequency division multiplexing OFDM symbol power ratio. Suppose that E_RS=1, x=1.25, 1, 0.75, and 0.5 correspond to P B =0, 1, 2, and 3, respectively. After substituting into formula (2), respectively, P A =0 db, -3 db, -4.77 dB, -6 dB can be calculated. Thus, P B and P A satisfy the relationship:
PA＝-10·lg(PB+1)    (3)PA=-10·lg(PB+1) (3)
在其他情况下遍历亦满足式(3)。In other cases, traversal also satisfies equation (3).
计算归一化的小区公共参考信号时假设小区总功率为1，以A类OFDM符号计算功率，可得
Figure PCTCN2016099532-appb-000001
Calculate the normalized common reference signal of the cell, assuming that the total power of the cell is 1, and calculate the power by using the class A OFDM symbol.
Figure PCTCN2016099532-appb-000001
其中，RBNum×12表示A类OFDM符号中所有的PDSCH的资源单元个数。根据(4)式计算得到：Where RBNum×12 represents the number of resource units of all PDSCHs in the class A OFDM symbol. Calculated according to formula (4):
E_RS归一＝10·lg(1/12/RBNum)-PA    (5)E_RS normalization = 10 · lg (1/12 / RBNum) -PA (5)
因为PA是UE级的参数，实际各UE PA参数可能全部相同，因此利用将式(3)带入式(5)，即可得到式(1)。Since P A is a UE-level parameter, the actual UE P A parameters may all be the same, so by bringing equation (3) into equation (5), equation (1) can be obtained.
生成归一化的小区公共参考信号之后，在步骤S12中，可以根据所述归一化的小区公共参考信号功率，生成基带数字信号。为了使小区公共参考信号功率配置的更为精确，可以按照满量程原则生成基带数字信号。After generating the normalized cell common reference signal, in step S12, a baseband digital signal may be generated according to the normalized cell common reference signal power. In order to make the cell common reference signal power configuration more precise, the baseband digital signal can be generated according to the full-scale principle.
在本发明的一个实施例中，具体可以根据如下公式对所述归一化的小区公共参考信号的频域信号功率进行加权：In an embodiment of the present invention, the frequency domain signal power of the normalized cell common reference signal may be specifically weighted according to the following formula:
Srs2＝Srs1·2(E_RS 归一 +PIRDBFS)/20    (6)S rs2 =S rs1 ·2 (E_RS normalized +PIRDBFS)/20 (6)
其中，Srs1为加权前的公共参考信号，Srs2为加权后的公共参考信号，PIRDBFS为基站Ir接口(Open Interface between the RRU and the BBU，开放的BBU与RRU接口)约定的最大数字功率。Where S rs1 is the common reference signal before weighting, S rs2 is the weighted common reference signal, and P IRDBFS is the maximum digital power agreed by the Open Interface between the RRU and the BBU (open BBU and RRU interface). .
生成基带数字信号后，在步骤S13中可以将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。具体的，由于在步骤S12中是采用满功率的原则生成基带数字信号的，功率已达最大，因此需要进行一定功率调整后再发送到空口。After the baseband digital signal is generated, the baseband digital signal can be converted into an analog signal and power adjusted and then sent to the air interface in step S13. Specifically, since the baseband digital signal is generated by using the principle of full power in step S12, the power has reached the maximum, so it needs to be adjusted after a certain power and then sent to the air interface.
可选的，可以将所述基带数字信号转化成模拟信号并进行功率衰减后发送到空口，功率衰减系数α满足如下公式：Optionally, the baseband digital signal may be converted into an analog signal and subjected to power attenuation and then sent to the air interface, and the power attenuation coefficient α satisfies the following formula:
α＝10·lg((PB+1)·Pbase/PortNum/12/RBNum)-E_RS；    (7)α=10·lg((P B +1)·P base /PortNum/12/RBNum)-E_RS; (7)
其中，Pbase为基站额定功率，E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。10·lg((PB+1)·Pbase/PortNum /12/RBNum)表示的是根据基站额定功率计算出来的最大可配置的小区公共参考信号功率的最大值，计算方法同前面推导，而E_RS为实际用户配置的小区公共参考信号功率。The P base is the base station rated power, the E_RS is the cell common reference signal power, and the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block, and the RBNum is the LTE system bandwidth resource block number. PortNum is the number of LTE antenna ports. 10·lg((P B +1)·P base /PortNum /12/RBNum) represents the maximum value of the maximum configurable cell common reference signal power calculated according to the rated power of the base station, and the calculation method is the same as before, and E_RS is the cell common reference signal power configured by the actual user.
可选的，可以通过基站的射频模块将基带信号经变频，滤波，射频滤波，线性功率放大器后传至天馈系统，信号可在过滤波时进行功率衰减。Optionally, the baseband signal can be converted, filtered, and RF filtered by the RF module of the base station, and then transmitted to the antenna feeder system by the linear power amplifier, and the signal can be power-decayed when filtering the wave.
在上述实施例中，确定小区公共参考信号功率时用到了多个小区功率参数，如E_RS、PB、PortNum等，在这些功率参数设置合适的情况下，才能够更加准确的发送小区公共参考信号。In the above embodiment, multiple cell power parameters, such as E_RS, P B , PortNum, etc., are used when determining the cell common reference signal power, and the cell common reference signal can be transmitted more accurately when these power parameters are properly set. .
为了检测上述功率参数设置是否合适，进一步的，在本发明的一个实施例中，在确定归一化的小区公共参考信号功率之前，小区公共参考信号的发送方法还包括：检测小区最大发射功率是否小于基站额定功率。Further, in an embodiment of the present invention, before determining the normalized common reference signal power of the cell, the method for transmitting the common reference signal of the cell further includes: detecting whether the maximum transmit power of the cell is Less than the rated power of the base station.
基于此，确定归一化的小区公共参考信号功率包括：在所述小区最大发射功率小于基站额定功率的情况下，确定归一化的小区公共参考信号功率。在小区最大发射功率大于基站额定功率的情况下，基站可发出功率参数配置不合理告警。Based on this, determining the normalized cell common reference signal power includes determining a normalized cell common reference signal power if the maximum transmit power of the cell is less than the base station rated power. When the maximum transmit power of the cell is greater than the rated power of the base station, the base station may issue an unreasonable alarm for configuring the power parameter.
可选的，检测小区最大发射功率是否小于基站额定功率可包括：检测Pcell max是否小于Pbase；Optionally, detecting whether the maximum transmit power of the cell is less than the rated power of the base station may include: detecting whether P cell max is smaller than P base ;
其中，Pcell max为小区最大发射功率，Where P cell max is the maximum transmit power of the cell,
Pcell max＝12·RBNum·10E_RS/10·PortNum/(PB+1)    (8)P cell max =12·RBNum·10 E_RS/10 ·PortNum/(P B +1) (8)
Pbase为基站额定功率，P base is the rated power of the base station,
E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。E_RS is the common reference signal power of the cell, and P B is the index associated with the power ratio of the class B OFDM symbol and the class A OFDM symbol power in the LTE frequency domain resource block, RBNum is the number of bandwidth resource blocks of the LTE system, and PortNum is the number of LTE antenna ports.
相应的，如图2所示，本发明的实施例还提供一种小区公共参考信号的发送装置，包括：Correspondingly, as shown in FIG. 2, an embodiment of the present invention further provides a device for transmitting a common reference signal of a cell, including:
确定单元21，用于确定归一化的小区公共参考信号功率；a determining unit 21, configured to determine a normalized cell common reference signal power;
生成单元22，用于根据所述归一化的小区公共参考信号功率，生成基带数字信号，所述基带数字信号的功率为基带数字信号所允许的最大功率；The generating unit 22 is configured to generate a baseband digital signal according to the normalized cell common reference signal power, where the power of the baseband digital signal is the maximum power allowed by the baseband digital signal;
调整和发送单元23，用于将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。The adjusting and transmitting unit 23 is configured to convert the baseband digital signal into an analog signal and perform power adjustment and then send the signal to the air interface.
本发明实施例提供的小区公共参考信号的发送装置，确定单元21能够确定归一 化的小区公共参考信号功率，生成单元22能够根据所述归一化的小区公共参考信号功率，生成基带数字信号，调整和发送单元23能够将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。这样，由于采用最大功率的原则生成基带小区参考信号，保证了基带信号的数字精度，使小区公共参考信号的功率能够更准确地分配在下行数据中。The device for transmitting the common reference signal of the cell provided by the embodiment of the present invention, the determining unit 21 can determine the normalization The cell common reference signal power, the generating unit 22 is capable of generating a baseband digital signal according to the normalized cell common reference signal power, and the adjusting and transmitting unit 23 can convert the baseband digital signal into an analog signal and perform power adjustment. After sending to the air interface. In this way, since the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.
可选的，确定单元21，可具体用于：Optionally, the determining unit 21 is specifically configured to:
根据如下公式确定所述归一化的小区公共参考信号功率：The normalized cell common reference signal power is determined according to the following formula:
E_RS归一＝10·lg((PB+1)/12/RBNum)    (1)E_RS normalization = 10 · lg ((P B +1) / 12 / RBNum) (1)
其中，E_RS归一为归一化的小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数。The E_RS is a normalized common reference signal power of the cell, and the P B is an index associated with the power ratio of the class B OFDM symbol in the LTE frequency domain resource block and the power ratio of the class A OFDM symbol, and the RBNum is the number of bandwidth resource blocks of the LTE system.
可选的，生成单元22，具体可用于：根据如下公式对所述归一化的小区公共参考信号的频域信号功率进行加权：Optionally, the generating unit 22 is specifically configured to: weight the frequency domain signal power of the normalized cell common reference signal according to the following formula:
Srs2＝Srs1·2(E_RS 归一 +P IRDBFS )/20    (6) S rs2 = S rs1 · 2 ( E_RS normalized + P IRDBFS) / 20 (6 )
其中，Srs1为加权前的公共参考信号功率，Srs2为加权后的公共参考信号功率，PIRDBFS为基站红外接口的最大数字功率。Where S rs1 is the common reference signal power before weighting, S rs2 is the weighted common reference signal power, and P IRDBFS is the maximum digital power of the infrared interface of the base station.
可选的，调整和发送单元23，具体可用于：将所述基带数字信号转化成模拟信号并进行功率衰减后发送到空口，功率衰减系数α满足如下关系：Optionally, the adjusting and transmitting unit 23 is specifically configured to: convert the baseband digital signal into an analog signal, perform power attenuation, and then send the signal to the air interface, where the power attenuation coefficient α satisfies the following relationship:
α＝10·lg((PB+1)·Pbase/PortNum/12/RBNum)-E_RS    (7)α=10·lg((P B +1)·P base /PortNum/12/RBNum)-E_RS (7)
其中，Pbase为基站额定功率，E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。The P base is the base station rated power, the E_RS is the cell common reference signal power, and the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block, and the RBNum is the LTE system bandwidth resource block number. PortNum is the number of LTE antenna ports.
相应的，本发明实施例还提供一种基站，包括前述实施例提供的任一种小区公共参考信号的发送装置，因此也能实现相应的技术效果，前文已经进行了详细的说明，此处不再赘述。Correspondingly, the embodiment of the present invention further provides a base station, which includes any one of the cell common reference signal sending devices provided by the foregoing embodiments, and thus can achieve corresponding technical effects. The foregoing has been described in detail, and is not Let me repeat.
本申请实施例提供的小区公共参考信号的发送装置中的各个模块或单元可以通过一个或多个数字信号处理器(DSP)、专用集成电路(ASIC)、处理器、微处理器、控制器、微控制器、现场可编程阵列(FPGA)、可编程逻辑器件或其他电子单元或其任意组合来实现。在本申请实施例中描述的一些功能或处理也可以通过在处理器上执行的软件来实现。 Each module or unit in the transmitting device of the cell common reference signal provided by the embodiment of the present application may pass through one or more digital signal processors (DSPs), application specific integrated circuits (ASICs), processors, microprocessors, controllers, Implemented by a microcontroller, field programmable array (FPGA), programmable logic device, or other electronic unit, or any combination thereof. Some of the functions or processes described in this application embodiment may also be implemented by software executing on a processor.
例如，本发明的实施例还提供了一种小区公共参考信号的发送装置，例如该装置可以应用于一基站，包括：For example, an embodiment of the present invention further provides a sending apparatus for a common reference signal of a cell, for example, the apparatus may be applied to a base station, including:
处理器；processor;
用于存储处理器可执行指令的存储器；a memory for storing processor executable instructions;
其中，所述处理器被配置为：Wherein the processor is configured to:
确定归一化的小区公共参考信号功率；Determining a normalized cell common reference signal power;
根据所述归一化的小区公共参考信号功率，生成基带数字信号，所述基带数字信号的功率为基带数字信号所允许的最大功率；Generating a baseband digital signal according to the normalized cell common reference signal power, where the power of the baseband digital signal is the maximum power allowed by the baseband digital signal;
将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。Converting the baseband digital signal into an analog signal and performing power adjustment and transmitting to the air interface.
工业实用性Industrial applicability
本申请的方法和装置可应用于通信领域中，主要可应用于基站将小区参考信号以合适的功率准确发送。在本申请的实施例中，由于采用最大功率的原则生成基带小区参考信号，保证了基带信号的数字精度，使小区公共参考信号的功率能够更准确地分配在下行数据中。The method and apparatus of the present application are applicable to the field of communications, and are mainly applicable to a base station to accurately transmit a cell reference signal with an appropriate power. In the embodiment of the present application, since the baseband cell reference signal is generated by using the principle of maximum power, the digital precision of the baseband signal is ensured, so that the power of the common reference signal of the cell can be more accurately allocated in the downlink data.
尽管为示例目的，已经公开了本发明的优选实施例，本领域的技术人员将意识到各种改进、增加和取代也是可能的，因此，本发明的范围应当不限于上述实施例。 While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Claims (11)

  1. 一种小区公共参考信号的发送方法，其中其中，包括：A method for transmitting a common reference signal of a cell, wherein:
    确定归一化的小区公共参考信号功率；Determining a normalized cell common reference signal power;
    根据所述归一化的小区公共参考信号功率，生成基带数字信号，所述基带数字信号的功率为基带数字信号所允许的最大功率；Generating a baseband digital signal according to the normalized cell common reference signal power, where the power of the baseband digital signal is the maximum power allowed by the baseband digital signal;
    将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。Converting the baseband digital signal into an analog signal and performing power adjustment and transmitting to the air interface.
  2. 根据权利要求1所述的方法，其中其中，所述确定归一化的小区公共参考信号功率包括：The method of claim 1 wherein said determining a normalized cell common reference signal power comprises:
    根据如下公式确定所述归一化的小区公共参考信号功率：The normalized cell common reference signal power is determined according to the following formula:
    E_RS归一＝10·lg((PB+1)/12/RBNum)；E_RS normalized = 10·lg ((P B +1)/12/RBNum);
    其中，E_RS归一为归一化的小区公共参考信号功率，PB为长期演进LTE频域资源块中B类OFDM符号功率和A类正交频分复用OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数。Wherein, E_RS is normalized to a normalized cell common reference signal power, and P B is an index associated with a class B OFDM symbol power and a class A orthogonal frequency division multiplexing OFDM symbol power ratio in a Long Term Evolution LTE frequency domain resource block, RBNum The number of bandwidth resource blocks for the LTE system.
  3. 根据权利要求2所述的方法，其中其中，所述根据所述归一化的小区公共参考信号功率，生成基带数字信号包括：The method of claim 2, wherein the generating the baseband digital signal based on the normalized cell common reference signal power comprises:
    根据如下公式对所述归一化的小区公共参考信号的频域信号功率进行加权：
    Figure PCTCN2016099532-appb-100001
    The frequency domain signal power of the normalized cell common reference signal is weighted according to the following formula:
    Figure PCTCN2016099532-appb-100001
    其中，Srs1为加权前的公共参考信号功率，Srs2为加权后的公共参考信号功率，PIRDBFS为基站红外接口的最大数字功率。Where S rs1 is the common reference signal power before weighting, S rs2 is the weighted common reference signal power, and P IRDBFS is the maximum digital power of the infrared interface of the base station.
  4. 根据权利要求1所述的方法，其中其中，所述确定归一化的小区公共参考信号功率之前，所述方法还包括：The method of claim 1, wherein before the determining the normalized cell common reference signal power, the method further comprises:
    检测小区最大发射功率是否小于基站额定功率；Detecting whether the maximum transmit power of the cell is less than the rated power of the base station;
    所述确定归一化的小区公共参考信号功率包括：The determining the normalized cell common reference signal power includes:
    在所述小区最大发射功率小于基站额定功率的情况下，确定归一化的小区公共参考信号功率。The normalized cell common reference signal power is determined in a case where the maximum transmit power of the cell is less than the rated power of the base station.
  5. 根据权利要求4所述的方法，其中其中，所述检测小区最大发射功率是否小于基站额定功率包括：The method of claim 4, wherein the detecting whether the maximum transmit power of the cell is less than the rated power of the base station comprises:
    检测Pcell max是否小于Pbase；It is detected whether P cell max is smaller than P base ;
    其中，Pcell max为小区最大发射功率，Where P cell max is the maximum transmit power of the cell,
    Pcell max＝12·RBNum·10E_RS/10·PortNum/(PB+1)， P cell max =12·RBNum·10 E_RS/10 ·PortNum/(P B +1),
    Pbase为基站额定功率，P base is the rated power of the base station,
    E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。E_RS is the common reference signal power of the cell, and P B is the index associated with the power ratio of the class B OFDM symbol and the class A OFDM symbol power in the LTE frequency domain resource block, RBNum is the number of bandwidth resource blocks of the LTE system, and PortNum is the number of LTE antenna ports.
  6. 根据权利要求1所述的方法，其中其中，所述将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口包括：The method of claim 1 wherein said converting said baseband digital signal to an analog signal and performing power adjustment to transmit to said air interface comprises:
    将所述基带数字信号转化成模拟信号并进行功率衰减后发送到空口，功率衰减系数α＝10·lg(PB+1)·Pbase/PortNum/12/RBNum)-E_RS；Converting the baseband digital signal into an analog signal and performing power attenuation and transmitting to the air interface, the power attenuation coefficient α=10·lg(P B +1)·P base /PortNum/12/RBNum)-E_RS;
    其中，Pbase为基站额定功率，E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。The P base is the base station rated power, the E_RS is the cell common reference signal power, and the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block, and the RBNum is the LTE system bandwidth resource block number. PortNum is the number of LTE antenna ports.
  7. 一种小区公共参考信号的发送装置，其中其中，包括：A device for transmitting a common reference signal of a cell, wherein:
    确定单元，设置为确定归一化的小区公共参考信号功率；Determining a unit, configured to determine a normalized cell common reference signal power;
    生成单元，设置为根据所述归一化的小区公共参考信号功率，生成基带数字信号，所述基带数字信号的功率为基带数字信号所允许的最大功率；Generating unit, configured to generate a baseband digital signal according to the normalized cell common reference signal power, where the power of the baseband digital signal is a maximum power allowed by the baseband digital signal;
    调整和发送单元，设置为将所述基带数字信号转化成模拟信号并进行功率调整后发送到空口。The adjusting and transmitting unit is configured to convert the baseband digital signal into an analog signal and perform power adjustment and then send the signal to the air interface.
  8. 根据权利要求7所述的装置，其中其中，所述确定单元，设置为：The apparatus according to claim 7, wherein said determining unit is configured to:
    根据如下公式确定所述归一化的小区公共参考信号功率：The normalized cell common reference signal power is determined according to the following formula:
    E_RS归一＝10·lg((PB+1)/12/RBNum)；E_RS normalized = 10·lg ((P B +1)/12/RBNum);
    其中，E_RS归一为归一化的小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数。The E_RS is a normalized common reference signal power of the cell, and the P B is an index associated with the power ratio of the class B OFDM symbol in the LTE frequency domain resource block and the power ratio of the class A OFDM symbol, and the RBNum is the number of bandwidth resource blocks of the LTE system.
  9. 根据权利要求8所述的装置，其中其中，The device according to claim 8, wherein
    所述生成单元，设置为：The generating unit is set to:
    根据如下公式对所述归一化的小区公共参考信号的频域信号功率进行加权：
    Figure PCTCN2016099532-appb-100002
    The frequency domain signal power of the normalized cell common reference signal is weighted according to the following formula:
    Figure PCTCN2016099532-appb-100002
    其中，Srs1为加权前的公共参考信号功率，Srs2为加权后的公共参考信号功率，PIRDBFS为基站红外接口的最大数字功率。Where S rs1 is the common reference signal power before weighting, S rs2 is the weighted common reference signal power, and P IRDBFS is the maximum digital power of the infrared interface of the base station.
  10. 根据权利要求7所述的装置，其中其中，所述调整和发送单元，设置为： The apparatus according to claim 7, wherein said adjustment and transmission unit is configured to:
    将所述基带数字信号转化成模拟信号并进行功率衰减后发送到空口，功率衰减系数α＝10·lg(PB+1)·Pbase/PortNum/12/RBNum)-E_RS；Converting the baseband digital signal into an analog signal and performing power attenuation and transmitting to the air interface, the power attenuation coefficient α=10·lg(P B +1)·P base /PortNum/12/RBNum)-E_RS;
    其中，Pbase为基站额定功率，E_RS为小区公共参考信号功率，PB为LTE频域资源块中B类OFDM符号功率和A类OFDM符号功率比值关联的索引，RBNum为LTE系统带宽资源块数，PortNum为LTE天线端口数。The P base is the base station rated power, the E_RS is the cell common reference signal power, and the P B is the index associated with the class B OFDM symbol power and the class A OFDM symbol power ratio in the LTE frequency domain resource block, and the RBNum is the LTE system bandwidth resource block number. PortNum is the number of LTE antenna ports.
  11. 一种基站，其中其中，包括权利要求7至10中任一项所述的小区公共参考信号的发送装置。 A base station, wherein the transmitting apparatus of the cell common reference signal according to any one of claims 7 to 10 is included.
PCT/CN2016/099532 2016-01-04 2016-09-21 Cell common reference signal sending method and apparatus, and base station WO2017118098A1 (en)

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