WO2014106390A1 - 一种下行功率参数的配置方法及装置 - Google Patents

一种下行功率参数的配置方法及装置 Download PDF

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Publication number
WO2014106390A1
WO2014106390A1 PCT/CN2013/082671 CN2013082671W WO2014106390A1 WO 2014106390 A1 WO2014106390 A1 WO 2014106390A1 CN 2013082671 W CN2013082671 W CN 2013082671W WO 2014106390 A1 WO2014106390 A1 WO 2014106390A1
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WO
WIPO (PCT)
Prior art keywords
terminal
cell
downlink power
base station
parameters
Prior art date
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PCT/CN2013/082671
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English (en)
French (fr)
Inventor
徐汉青
赵亚军
莫林梅
黄琛
李玉洁
孙宝玉
陈国峰
秦洪峰
Original Assignee
中兴通讯股份有限公司
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Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/759,275 priority Critical patent/US20150358913A1/en
Priority to JP2015551102A priority patent/JP6041999B2/ja
Priority to EP13870353.3A priority patent/EP2943021A4/en
Publication of WO2014106390A1 publication Critical patent/WO2014106390A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/143Downlink power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035Resource allocation in a cooperative multipoint environment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/40TPC being performed in particular situations during macro-diversity or soft handoff
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for configuring downlink power parameters.
  • CoMP Coordinatd Multi-Point
  • LTE-A Long Term Evolution-Advanced
  • the JT (Joint Transmission) mechanism in the CoMP technology uses a method in which a primary cell and a cooperative cell jointly transmit a PDSCH (Physical Downlink Shared Channel).
  • the DPS (Dynamic Point Selection) mechanism dynamically selects a single cell to transmit the PDSCH according to the channel conditions of the primary cell and the coordinated cell to the terminal.
  • the embodiments of the present invention provide a method and a device for configuring downlink power parameters, which solve the problem of inaccurate estimation of the downlink channel estimation amplitude, thereby improving system performance.
  • the embodiment of the invention provides a method for configuring a downlink power parameter, including:
  • the base station configures downlink power parameters for the primary cell and the coordinated cell of the terminal in the coordinated multi-point CoMP set where the terminal is located;
  • the base station notifies the terminal of the downlink power parameter.
  • the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
  • the base station configures a power ratio between the same different symbols of the primary cell and the coordinated cell of the terminal.
  • the downlink power parameter includes a cell-specific parameter P B ;
  • the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
  • the base station configures the primary cell and the coordinated cell of the terminal to use the same P B .
  • the base station configures downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
  • the base station configures the primary cell and the coordinated cell of the terminal to use the same reference signal power parameter, the same CRS-containing OFDM symbol power parameter, and the same CRS-free parameter. OFDM symbol power parameters.
  • the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power PRS, and a terminal-specific parameter P A ;
  • the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
  • the base station configures the primary cell and the coordinated cell of the terminal to use the same P B , P RS and P A .
  • the downlink power parameter includes P B , P RS , and P A ;
  • the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
  • the base station configures a downlink power parameter for the primary cell of the terminal, and configures a downlink power parameter for the coordinated cell of the terminal, and after selecting the used single cell, the terminal is used.
  • the downlink power parameter of the primary cell is modified to the selected downlink power parameter of the used single cell.
  • the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power PRS, and a terminal-specific parameter P A ;
  • the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
  • the base station configures independent downlink power parameters for the primary cell and the coordinated cell of the terminal.
  • the base station notifying the terminal of the downlink power parameter includes:
  • the base station sends a downlink power parameter of the used single cell selected under the DPS mechanism to the terminal.
  • the embodiment of the present invention further provides a device for configuring a downlink power parameter, including: a base station power parameter configuration and a constraint unit, and a base station power parameter selection and signaling delivery unit, where:
  • the base station power parameter configuration and the constraint unit are set to: a coordinated multipoint for the terminal
  • the primary cell and the coordinated cell of the terminal in the CoMP set are configured with downlink power parameters; and the base station power parameter selection and signaling sending unit is configured to: notify the terminal of the downlink power parameter.
  • the base station power parameter configuration and the constraint unit are configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner: jointly transmitting JT in CoMP In the mechanism, the primary cell and the coordinated cell configuring the terminal use the same power ratio between different symbols.
  • the downlink power parameter includes a cell-specific parameter P B ;
  • the base station power parameter configuration and the constraining unit are configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner:
  • the primary cell and the coordinated cell configuring the terminal use the same P B .
  • the base station power parameter configuration and the constraint unit are configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner: dynamic point selection in the CoMP
  • the primary cell and cooperation of the terminal when configuring the DPS mechanism The cell uses the same reference signal power parameter, the same CRS-containing OFDM symbol power parameter, and the same OFDM symbol power parameter that does not contain the CRS.
  • the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power PRS, and a terminal-specific parameter P A ;
  • the base station power parameter configuration and the constraint unit are set to be located in the following manner
  • the primary cell and the coordinated cell of the terminal in the CoMP set are configured with downlink power parameters:
  • the primary cell and the coordinated cell configuring the terminal use the same P B , P RS , and P A ; or
  • the independent primary power parameters are configured for the primary cell and the coordinated cell of the terminal.
  • the base station power parameter selection and signaling sending unit is configured to notify the terminal of the downlink power parameter in the following manner:
  • the base station power parameter configuration and the constraint unit configure respective independent downlink power parameters for the primary cell and the coordinated cell of the terminal, send downlink power parameters of the used single cell selected by the DPS mechanism to the Said terminal.
  • the present invention configures downlink power parameters for both the primary cell and the coordinated cell in the CoMP set in which the terminal is located, and notifies the terminal of the downlink power parameter, which can solve the system performance problem caused by the terminal downlink channel estimation inaccuracy, thereby improving System performance.
  • FIG. 1 is a flowchart of a method for configuring a downlink power parameter according to an embodiment of the present invention
  • FIG. 2 is a structural diagram of an apparatus for configuring a downlink power parameter according to an embodiment of the present invention
  • FIG. 3 is a structural diagram of a terminal according to an embodiment of the present invention. Preferred embodiment of the invention. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
  • the configuration in the upper layer may not be 1, that is, and may not be equal, according to the definition of 1 ⁇ 2, when it is not equal to 1 ⁇ 2, it contains CRS (Cell-specific Reference Signals).
  • the OFDM (Orthogonal Frequency Division Multiplexing) symbol is different from the power of the OFDM symbol without CRS; when using the CoMP JT/DPS mechanism, according to the 3rd Generation Partnership Project (3GPP) In the version 10/11 (R10/R11) standard, the terminal only knows the P A , P B and CRS power configuration values (ie, P RS ) of the camped cell, and the values of the camped cell and the coordinated cell are possible.
  • the difference between the camping cell and the cooperating cell may be different.
  • the downlink channel is used.
  • UE-specific Reference Signals also known as DMRS (Demodulation Reference Signals)
  • the downlink channel is used.
  • the DMRS power is the same as the power of the OFDM symbol of the camping cell that does not contain the CRS, because the CRS-containing OFDM symbol of the camping cell does not contain CR.
  • the power of the OFDM symbol of S is different, so the DMRS power is inconsistent with the power of the CRS-containing OFDM symbol of the camping cell, and because the camped cell and the coordinated cell may also be different, the DMRS power may also be related to the OFDM symbol of the coordinated cell. The power is inconsistent, which in turn leads to an increase in the amplitude error of the downlink channel estimation.
  • the base station configures downlink power parameters for both the primary cell and the coordinated cell in the CoMP set where the terminal is located, so as to solve the problem that the downlink channel estimation amplitude is inaccurate.
  • the method for configuring a downlink power parameter in this embodiment includes the following steps: Step 101: A base station configures downlink power parameters of each cell in a CoMP JT/DPS set where the terminal is located, including P B , P RS , and P A, etc.
  • the base station configures the power ratios between different symbols of all cells in the CoMP JT set to be the same. If the JT mechanism is used, the base station configures all cells in the CoMP JT set to use the same P B , that is, to ensure that all cells in the CoMP JT set are the same, that is, the power ratios between different symbols of all cells are the same.
  • the method of configuring the post-constraint first can be obtained.
  • the downlink power parameter of each cell is configured first, and then the P B of the coordinated cell is kept the same as the P B of the camping cell, and the P B and the coordinated cell of the camping cell can also be made.
  • the P B remains the same
  • the method of configuring the power parameters of each cell under the same constraint condition of P B can also be taken.
  • cells in the set can have the same CoMP JT P RS, P A, may be arranged different P RS, P A.
  • the downlink power parameter of the single cell (the camping cell, that is, the primary cell) is configured, and the downlink power parameters of the coordinated cell in the JT set are not configured and restricted, so that the terminal cannot be downlinked according to the received camped cell.
  • the power parameter performs accurate channel estimation on the data jointly transmitted by the multi-cell.
  • the downlink power parameters of multiple cells are configured, and the cells in the set are increased.
  • the base station configures and constrains the downlink power parameters of each cell in the CoMP DPS set.
  • the base station can configure parameters first, then perform parameter relationship constraints, and can also configure parameters under parameter relationship constraints. This step can include the following operations:
  • the base station configures and constrains all the coordinated cells in the CoMP DPS set to use the same downlink power parameters as the camped cell, including: the reference signal power parameter and the power parameters of different OFDM symbols are the same.
  • the base station configures and constrains all coordinated cells within the CoMP DPS set to use the same downlink power parameters as the camped cells: P B , P RS and P A .
  • the downlink power parameters of the single cell are configured, and the downlink power parameters of the coordinated cells in the DPS set are not configured and restricted.
  • the DPS mechanism is used to schedule the coordinated cell to send downlink data
  • the terminal cannot perform accurate channel estimation on the data sent by the coordinated cell according to the received downlink power parameter of the camped cell.
  • the downlink power parameter of the multi-cell is configured, and the above constraint conditions are added to solve the problem that the channel estimation range is inaccurate.
  • the base station configures downlink power parameters for the camped cell and the coordinated cell respectively, and after selecting the used single cell under the DPS mechanism, the base station changes the downlink power parameter of the camped cell of the terminal.
  • the downlink power parameter of the single cell used for the DPS selection is the downlink power parameter of the single cell used for the DPS selection.
  • the downlink power parameter of the single cell is configured, and the downlink power parameters of the coordinated cell in the DPS set are not configured and restricted.
  • the terminal cannot perform accurate channel estimation on the data sent by the coordinated cell according to the received downlink power parameter of the camped cell.
  • the downlink power parameter of the multi-cell is configured, and the above constraint conditions are added to solve the problem that the channel estimation range is inaccurate.
  • the base station configures the downlink power parameters of each cell in the CoMP DPS set, and does not constrain the parameter relationship between the cells, and configures independent downlink power parameters.
  • the downlink power parameters of the single cell are configured and notified, and the downlink power parameters of the coordinated cell in the DPS set are not configured, restricted, and notified.
  • the DPS mechanism is used to schedule the coordinated cell to transmit downlink data
  • the terminal cannot perform accurate channel estimation on the data sent by the coordinated cell according to the received power parameter of the camped cell.
  • the downlink power parameter of the multi-cell is configured, and the notification operation selected below is added to solve the problem that the channel estimation range is inaccurate.
  • the downlink power parameter of each cell may be configured first, and when the DPS cell is scheduled to send data, the following notification operation may be performed, or after the downlink power parameter of the DPS cell is configured (not all configured) The power parameter of the cell), immediately perform the following notification operation.
  • Step 102 The base station selects and notifies the downlink power parameters of the terminal: P B , P RS , P A , and the like.
  • the base station may select and notify the downlink power parameter of the resident cell of the terminal through RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the base station selects and notifies the downlink power parameter of the terminal, which may include the following operations:
  • the base station selects a downlink power parameter of the camped cell, and notifies the terminal by using RRC signaling;
  • the base station selects the downlink power parameter of the used single cell selected by the DPS for (3) in (2) in step 101, and notifies the terminal by using RRC signaling.
  • Step 103 The terminal receives the PDSCH, the DMRS, and the downlink power parameters P B , P RS , and P A , etc. Information, and channel estimation using DMRS as a reference signal to obtain a downlink channel H.
  • step 102 the terminal considers that it receives the downlink power parameters and data of the camped cell, and has performed correct parameter constraints, and uses these The power parameters are used for DMRS channel estimation.
  • step 102 the terminal considers that the downlink power parameters and data of the camped cell are received, and the correct parameter constraints have been performed, and the power parameters are correctly used.
  • DMRS channel estimation For the (1) under (2) in step 102, the terminal considers that the downlink power parameters and data of the camped cell are received, and the correct parameter constraints have been performed, and the power parameters are correctly used.
  • the terminal considers that the downlink power parameters and data of the single cell selected by the DPS are received, and the correct parameter constraints have been performed, and the power is utilized.
  • the parameters are correctly DMRS channel estimates.
  • Step 104 The terminal demodulates the PDSCH data sent by the CoMP JT/DPS cell by using the downlink channel H estimated by the DMRS channel.
  • the base station Since the base station has correctly configured, constrained, selected, and notified the downlink power parameters, the system performance problem caused by the terminal downlink channel estimation is not solved.
  • the embodiment further provides a configuration device for downlink power parameters, including: a base station power parameter configuration and constraint unit 21, and a base station power parameter selection and signaling delivery unit 22, where:
  • the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located;
  • the base station power parameter selection and signaling delivery unit 22 is configured to notify the terminal of the downlink power parameter.
  • the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner:
  • the downlink power parameter includes a cell specific parameter P B ;
  • the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for both the primary cell and the coordinated cell of the terminal in the CoMP set in which the terminal is located in the following manner:
  • the primary cell and the coordinated cell of the configuration terminal use the same P B .
  • the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner:
  • the primary cell and the coordinated cell of the configuration terminal use the same reference signal power parameter, the same OFDM symbol power parameter containing CRS, and the same OFDM symbol power parameter without CRS. .
  • the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power P RS , and a terminal-specific parameter P A ;
  • the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for both the primary cell and the coordinated cell of the terminal in the CoMP set in which the terminal is located in the following manner:
  • the primary cell and the coordinated cell of the configuration terminal are the same.
  • the downlink power parameter is configured; or, the primary power cell and the coordinated cell of the terminal are configured with independent downlink power parameters.
  • the base station power parameter selection and signaling delivery unit 22 is configured to notify the terminal of the downlink power parameters in the following manner:
  • the base station power parameter configuration and constraint unit 21 configures the independent downlink power parameters for the primary cell and the coordinated cell of the terminal.
  • the downlink power parameter of the used single cell selected under the DPS mechanism is sent to the terminal.
  • the embodiment further provides a terminal, including: a terminal power parameter receiving and channel estimating unit 31 and a downlink data demodulating unit 32, where:
  • the terminal power parameter receiving and channel estimating unit 31 is configured to receive the PDSCH, the DMRS, and the lower Line power parameters P B , P RS and P A and other information, and channel estimation using DMRS as a reference signal to obtain a downlink channel H;
  • the downlink data demodulating unit 32 is configured to demodulate the PDSCH data transmitted by the CoMP JT/DPS cell by using the downlink channel H estimated by the DMRS channel.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
  • the method and apparatus of the embodiments of the present invention can solve the system performance problem caused by the terminal downlink channel estimation inaccuracy, thereby improving the performance of the system.

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Abstract

一种下行功率参数的配置方法及装置。所述方法包括:基站为终端所在的CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数;以及所述基站向所述终端通知所述下行功率参数。

Description

一种下行功率参数的配置方法及装置
技术领域
本发明涉及无线通信领域, 尤其涉及一种下行功率参数的配置方法及装 置。
背景技术
随着人们对未来无线通信要求的不断提高, 小区边缘频谱效率和用户体 验更加受到重视, 如何提高小区边缘的传输质量与吞吐量成为竟相研究的课 题。 CoMP ( Coordinated Multi-Point,协作多点)技术利用多个接入点( Access Point, AP )的天线协作传输和接收, 能有效解决小区边缘的干扰问题, 从而 提高无线链路的容量和可靠性。 因此, CoMP技术作为一项关键技术被引入 LTE-A ( Long Term Evolution-Advanced , 高级长期演进) 系统中。
CoMP技术中的 JT ( Joint Transmission, 联合发送)机制釆用主小区和协 作小区联合发送 PDSCH ( Physical Downlink Shared Channel , 物理下行链路共 享信道)的方法。 DPS ( Dynamic Point Selection, 动态点选择)机制则根据主 小区和协作小区到终端的信道状况, 动态地选择单小区来发送 PDSCH。
也就是说, 在使用 CoMP JT 和 DPS机制时, 均存在由协作小区发送 PDSCH的可能性。这种情况下,有可能会造成下行信道估计的幅度误差增大, 从而影响系统的性能。 发明内容
本发明实施例提供一种下行功率参数的配置方法及装置, 解决下行信道 估计幅度估计不准的问题, 从而提高系统的性能。
本发明实施例提供一种下行功率参数的配置方法, 包括:
基站为终端所在的协作多点 CoMP集合中的所述终端的主小区和协作小 区均配置下行功率参数; 以及
所述基站向所述终端通知所述下行功率参数。 可选地, 所述基站为终端所在的 CoMP集合中的所述终端的主小区和协 作小区均配置下行功率参数, 包括:
在釆用 CoMP的联合发送 JT机制时,所述基站配置所述终端的主小区和 协作小区釆用相同的不同符号之间的功率比。
可选地, 所述下行功率参数包含小区特定参数 PB;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的联合发送 JT机制时,所述基站配置所述终端的主小区和 协作小区釆用相同的 PB
可选地, 所述基站为终端所在的 CoMP集合中的所述终端的主小区和协 作小区均配置下行功率参数, 包括:
在釆用 CoMP的动态点选择 DPS机制时,所述基站配置所述终端的主小 区和协作小区釆用相同的参考信号功率参数、 相同的含有 CRS的 OFDM符 号功率参数, 以及相同的不含有 CRS的 OFDM符号功率参数。
可选地, 所述下行功率参数包含小区特定参数 PB、 小区特定参数参考信 号功率 PRS和终端特定参数 PA;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的动态点选择 DPS机制时,所述基站配置所述终端的主小 区和协作小区釆用相同的 PB、 PRS和 PA
可选地, 所述下行功率参数包含 PB、 PRS和 PA;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的 DPS机制时,所述基站为所述终端的主小区配置下行功 率参数和为所述终端的协作小区配置下行功率参数, 并在选择所使用的单小 区后, 将所述终端的主小区的下行功率参数修改为选择的所使用的单小区的 下行功率参数。 可选地, 所述下行功率参数包含小区特定参数 PB、 小区特定参数参考信 号功率 PRS和终端特定参数 PA;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的 DPS机制时,所述基站为所述终端的主小区和协作小区 配置各自独立的下行功率参数。
可选地, 基站向所述终端通知所述下行功率参数, 包括:
所述基站将在所述 DPS机制下选择的所使用的单小区的下行功率参数发 送给所述终端。
本发明实施例还提供一种下行功率参数的配置装置, 包括: 基站功率参 数配置和约束单元以及基站功率参数选择和信令下发单元, 其中:
所述基站功率参数配置和约束单元设置成: 为终端所在的协作多点
CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数; 以及 所述基站功率参数选择和信令下发单元设置成: 向所述终端通知所述下 行功率参数。
可选地, 所述基站功率参数配置和约束单元是设置成以如下方式为终端 所在的 CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数: 在釆用 CoMP的联合发送 JT机制时,配置所述终端的主小区和协作小区 釆用相同的不同符号之间的功率比。
可选地, 所述下行功率参数包含小区特定参数 PB;
所述基站功率参数配置和约束单元是设置成以如下方式为终端所在的 CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的联合发送 JT机制时,配置所述终端的主小区和协作小区 釆用相同的 PB
可选地, 所述基站功率参数配置和约束单元是设置成以如下方式为终端 所在的 CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数: 在釆用 CoMP的动态点选择 DPS机制时,配置所述终端的主小区和协作 小区釆用相同的参考信号功率参数、 相同的含有 CRS的 OFDM符号功率参 数, 以及相同的不含有 CRS的 OFDM符号功率参数。
可选地, 所述下行功率参数包含小区特定参数 PB、 小区特定参数参考信 号功率 PRS和终端特定参数 PA;
所述基站功率参数配置和约束单元是设置成以如下方式为终端所在的
CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的动态点选择 DPS机制时,配置所述终端的主小区和协作 小区釆用相同的 PB、 PRS和 PA; 或者,
为所述终端的主小区配置下行功率参数和为所述终端的协作小区配置下 行功率参数, 并在选择所使用的单小区后, 将所述终端的主小区的下行功率 参数修改为选择的所使用的单小区的下行功率参数; 或者,
为所述终端的主小区和协作小区配置各自独立的下行功率参数。
可选地, 所述基站功率参数选择和信令下发单元是设置成以如下方式向 所述终端通知所述下行功率参数:
在所述基站功率参数配置和约束单元为所述终端的主小区和协作小区配 置各自独立的下行功率参数时, 将在所述 DPS机制下选择的所使用的单小区 的下行功率参数发送给所述终端。
综上所述, 本发明为终端所在的 CoMP集合中的主小区和协作小区均配 置下行功率参数, 并向终端通知下行功率参数, 能够解决终端下行信道估计 不准引起的系统性能问题, 从而提高系统的性能。 附图概述
图 1为本发明实施方式的下行功率参数配置的方法的流程图;
图 2为本发明实施方式的下行功率参数配置的装置的架构图;
图 3为本发明实施方式的终端的架构图。 本发明的较佳实施方式 下文中将结合附图对本发明实施例进行详细说明。 需要说明的是, 在不 冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
考虑到在高层配置的 ^可能会不为 1 , 即, 和 可能会不相等, 根 据 和 ½的定义可知,在 和 ½不相等时,含有 CRS ( Cell-specific Reference Signals, 小区特定参考信号) 的 OFDM (正交频分复用 Orthogonal Frequency Division Multiplexing )符号与不含有 CRS的 OFDM符号的功率不同; 在使用 CoMP JT/DPS 机制时, 根据第三代合作伙伴项目 (the 3rd Generation Partnership Project, 3GPP )版本 10/11 ( R10/R11 )标准, 终端只知道其驻留 小区的 PA、 PB以及 CRS功率配置值(即, PRS ) , 而驻留小区和协作小区的 这几个值有可能不同, 使得驻留小区和协作小区的 ^也有可能不同; 当使 用 UE-RS ( UE-specific Reference Signals, 用户特定参考信号) (又称 DMRS ( Demodulation Reference Signals, 解调参考信号) )进行下行信道估计时, DMRS功率和驻留小区的不含有 CRS的 OFDM符号的功率一致, 因为, 驻 留小区的含有 CRS的 OFDM符号与不含有 CRS的 OFDM符号的功率不同, 所以 DMRS功率与驻留小区的含有 CRS的 OFDM符号的功率不一致, 又因 为驻留小区和协作小区的 也有可能不同,所以 DMRS功率也有可能与协 作小区的 OFDM符号的功率不一致,进而导致下行信道估计的幅度误差增大。
其中, 代表符号中不含有小区参考信号的 PDSCH资源元素的能量与 小区参考信号资源元素的能量的比值, ^代表符号中含有小区参考信号的 PDSCH资源元素的能量与小区参考信号资源元素的能量的比值。
本实施方式中, 基站为终端所在的 CoMP集合中的主小区和协作小区均 配置下行功率参数, 以解决下行信道估计幅度不准的问题。
下面结合附图对本实施方式的下行功率参数的配置方法进行说明。
如图 1所示, 本实施方式的下行功率参数的配置方法, 包括如下步骤: 步骤 101、 基站配置终端所在的 CoMP JT/DPS集合内各小区的下行功率 参数, 包括 PB、 PRS和 PA等。
(一) 、 如果釆用 JT机制, 基站配置 CoMP JT集合内的所有小区的不 同符号之间的功率比相同。 如果釆用 JT机制,基站配置 CoMP JT集合内的所有小区釆用相同的 PB, 即,保证 CoMP JT集合内所有小区的 相同,也即所有小区的不同符号之 间的功率比相同。
这里可以釆取先配置后约束的方法(先配置好各小区的下行功率参数, 然后使协作小区的 PB与驻留小区的 PB保持相同, 也可以使驻留小区的 PB与 协作小区的 PB保持相同) , 也可以釆取在 PB相同的约束条件下, 同时配置 各小区功率参数的方法。 另外, CoMP JT集合内的小区可以配置相同的 PRS、 PA, 也可以配置不相同的 PRS、 PA
相关技术中仅仅配置单小区(驻留小区, 即, 主小区)的下行功率参数, 对 JT集合中协作小区的下行功率参数不做配置和约束,导致终端无法根据接 收到的驻留小区的下行功率参数, 对多小区联合发送的数据进行准确的信道 估计。 而本实施方式通过配置多小区的下行功率参数, 并增加集合内小区的
PB相等的约束条件, 解决信道估计幅度不准确的问题。
(二)、 如果釆用 DPS机制, 基站配置并约束 CoMP DPS集合内各小区 的下行功率参数。 基站可以先配置好参数, 再进行参数关系约束, 也可以在 参数关系约束条件下配置参数。 本步骤可以包括以下操作方式:
( 1 ) 、 基站配置并约束 CoMP DPS集合内的所有协作小区釆用与驻留 小区相同的下行功率参数, 包括: 参考信号功率参数以及不同 OFDM符号的 功率参数都对应相同。
基站配置并约束 CoMP DPS集合内的所有协作小区釆用与驻留小区相同 的下行功率参数: PB、 PRS和 PA
相关技术中仅仅配置单小区的下行功率参数, 对 DPS集合中协作小区的 下行功率参数不做配置和约束。 当通过 DPS机制调度协作小区发送下行数据 时, 导致终端无法根据接收到的驻留小区的下行功率参数, 对协作小区发送 的数据进行准确的信道估计。而本实施方式通过配置多小区的下行功率参数, 并增加以上约束条件, 解决信道估计幅度不准确的问题。
( 2 ) 、 基站分别为驻留小区和协作小区配置下行功率参数, 并在 DPS 机制下选择所使用的单小区后, 基站将终端的驻留小区的下行功率参数更改 为 DPS所选择的使用的单小区的下行功率参数。
相关技术中仅仅配置单小区 (驻留小区)的下行功率参数, 对 DPS集合 中协作小区的下行功率参数不做配置和约束。 当通过 DPS机制调度协作小区 发送下行数据时, 导致终端无法根据接收到的驻留小区的下行功率参数, 对 协作小区发送的数据进行准确的信道估计。 而本实施方式通过配置多小区的 下行功率参数, 并增加以上约束条件, 解决信道估计幅度不准确的问题。
( 3 )基站配置 CoMP DPS集合内各小区的下行功率参数, 对小区间的 参数关系不做约束, 配置各自独立的下行功率参数。
相关技术中仅仅配置和通知单小区(驻留小区)的下行功率参数,对 DPS 集合中协作小区的下行功率参数不做配置、 约束和通知。 当通过 DPS机制调 度协作小区发送下行数据时, 导致终端无法根据接收到的驻留小区的功率参 数, 对协作小区发送的数据进行准确的信道估计。 而本实施方式通过配置多 小区的下行功率参数, 并增加下面选择的通知操作, 解决信道估计幅度不准 确的问题。
本实施方式中, 既可以先配置好各小区的下行功率参数, 在调度 DPS小 区发送数据时, 再执行下面的通知操作, 也可以在配置好 DPS小区的下行功 率参数后(不需要配置好全部小区的功率参数), 立即执行下面的通知操作。
步骤 102、 基站选择并通知终端的下行功率参数: PB、 PRS和 PA等。
(一) 、 针对步骤 101中的(一) , 如果釆用的是 JT机制, 基站可以通 过 RRC ( Radio Resource Control, 无线资源控制)信令选择并通知终端的驻 留小区的下行功率参数。
(二) 、 针对步骤 101中的 (二) , 如果釆用的是 DPS机制, 基站选择 并通知终端的下行功率参数, 可以包括以下操作方式:
( 1 ) 、 针对步骤 101中 (二)下的 ( 1 )和( 2 ) , 基站选择驻留小区的 下行功率参数, 并通过 RRC信令通知给终端;
( 2 ) 、 针对步骤 101中 (二)下的 (3 ) , 基站选择 DPS选择的所使用 的单小区的下行功率参数, 并通过 RRC信令通知给终端。
步骤 103、 终端接收 PDSCH、 DMRS以及下行功率参数 PB、 PRS和 PA等 信息, 并进行以 DMRS为参考信号的信道估计, 得到下行信道 H。
(一) 、 针对步骤 102下的(一) , 如果釆用的是 JT机制, 终端认为其 接收到的是驻留小区的下行功率参数和数据, 并已进行了正确的参数约束, 并利用这些功率参数进行 DMRS信道估计。
(二) 、 针对步骤 102下的 (二) , 如果釆用的是 DPS机制, 则包括以 下操作方式:
( 1 ) 、 针对步骤 102下的 (二) 下的 (1 ) , 终端认为接收到的是驻留 小区的下行功率参数和数据, 并已进行了正确的参数约束, 并利用这些功率 参数进行正确的 DMRS信道估计;
( 2 ) 、 针对步骤 102下的 (二) 下的 (2 ) , 终端认为接收到的是 DPS 所选择的单小区的下行功率参数和数据, 并已进行了正确的参数约束, 并利 用这些功率参数进行正确的 DMRS信道估计。
步骤 104、终端利用 DMRS信道估计得到的下行信道 H,对 CoMP JT/DPS 小区发送的 PDSCH数据进行解调。
由于基站已经对下行功率参数进行了正确的配置、 约束、 选择和通知, 终端下行信道估计不准引起的系统性能问题得到解决。
如图 2所示, 本实施方式还提供了一种下行功率参数的配置装置, 包括: 基站功率参数配置和约束单元 21以及基站功率参数选择和信令下发单元 22, 其中:
基站功率参数配置和约束单元 21用于为终端所在的 CoMP集合中的终端 的主小区和协作小区均配置下行功率参数;
基站功率参数选择和信令下发单元 22用于向终端通知下行功率参数。 其中,基站功率参数配置和约束单元 21是用于以如下方式为终端所在的 CoMP集合中的终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的联合发送 JT机制时,配置终端的主小区和协作小区釆用 相同的不同符号之间的功率比。 其中, 下行功率参数包含小区特定参数 PB;
基站功率参数配置和约束单元 21是用于以如下方式为终端所在的 CoMP 集合中的终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的 JT机制时, 配置终端的主小区和协作小区釆用相同的 PB
其中,基站功率参数配置和约束单元 21是用于以如下方式为终端所在的 CoMP集合中的终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的动态点选择 DPS机制时,配置终端的主小区和协作小区 釆用相同的参考信号功率参数、 相同的含有 CRS的 OFDM符号功率参数, 以及相同的不含有 CRS的 OFDM符号功率参数。
其中, 下行功率参数包含小区特定参数 PB、 小区特定参数参考信号功率 PRS和终端特定参数 PA;
基站功率参数配置和约束单元 21是用于以如下方式为终端所在的 CoMP 集合中的终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的 DPS机制时,配置终端的主小区和协作小区釆用相同的
PB、 PRS和 PA; 或者, 分别为终端的主小区和协作小区配置下行功率参数, 并在选择所使用的单小区后, 将终端的主小区的下行功率参数修改为选择的 所使用的单小区的下行功率参数; 或者, 为终端的主小区和协作小区配置各 自独立的下行功率参数。
基站功率参数选择和信令下发单元 22是用于以如下方式向终端通知下 行功率参数:
在基站功率参数配置和约束单元 21 为终端的主小区和协作小区配置各 自独立的下行功率参数时, 将在 DPS机制下选择的所使用的单小区的下行功 率参数发送给终端。
如图 3所示, 本实施方式还提供了一种终端, 包括: 终端功率参数接收 和信道估计单元 31以及下行数据解调单元 32, 其中:
终端功率参数接收和信道估计单元 31用于接收 PDSCH、 DMRS以及下 行功率参数 PB、 PRS和 PA等信息, 并进行以 DMRS为参考信号的信道估计, 得到下行信道 H;
下行数据解调单元 32用于利用 DMRS信道估计得到的下行信道 H, 对 CoMP JT/DPS小区发送的 PDSCH数据进行解调。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而可以将它们存储在存储装置中由计算装置来执行, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明实施例不限制于任何特定的硬件 和软件结合。
以上该仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领 域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原 则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明所附权利 要求的保护范围之内。
工业实用性 釆用本发明实施例的方法及装置, 能够解决终端下行信道估计不准引起 的系统性能问题, 从而提高系统的性能。

Claims

权 利 要 求 书
1、 一种下行功率参数的配置方法, 包括:
基站为终端所在的协作多点 CoMP集合中的所述终端的主小区和协作小 区均配置下行功率参数; 以及
所述基站向所述终端通知所述下行功率参数。
2、 如权利要求 1所述的方法, 其中:
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的联合发送 JT机制时,所述基站配置所述终端的主小区和 协作小区釆用相同的不同符号之间的功率比。
3、 如权利要求 1所述的方法, 其中:
所述下行功率参数包含小区特定参数 PB;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的联合发送 JT机制时,所述基站配置所述终端的主小区和 协作小区釆用相同的 PB
4、 如权利要求 1所述的方法, 其中:
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的动态点选择 DPS机制时,所述基站配置所述终端的主小 区和协作小区釆用相同的参考信号功率参数、 相同的含有 CRS的 OFDM符 号功率参数, 以及相同的不含有 CRS的 OFDM符号功率参数。
5、 如权利要求 1所述的方法, 其中:
所述下行功率参数包含小区特定参数 PB、小区特定参数参考信号功率 PRS 和终端特定参数 PA;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括: 在釆用 CoMP的动态点选择 DPS机制时,所述基站配置所述终端的主小 区和协作小区釆用相同的 PB、 PRS和 PA
6、 如权利要求 1所述的方法, 其中:
所述下行功率参数包含小区特定参数 PB、小区特定参数参考信号功率 PRS 和终端特定参数 PA;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的 DPS机制时,所述基站为所述终端的主小区配置下行功 率参数和为所述终端的协作小区配置下行功率参数, 并在选择所使用的单小 区后, 将所述终端的主小区的下行功率参数修改为选择的所使用的单小区的 下行功率参数。
7、 如权利要求 1所述的方法, 其中:
所述下行功率参数包含小区特定参数 PB、小区特定参数参考信号功率 PRS 和终端特定参数 PA;
所述基站为终端所在的 CoMP集合中的所述终端的主小区和协作小区均 配置下行功率参数, 包括:
在釆用 CoMP的 DPS机制时,所述基站为所述终端的主小区和协作小区 配置各自独立的下行功率参数。
8、 如权利要求 7所述的方法, 其中, 所述基站向所述终端通知所述下行 功率参数, 包括:
所述基站将在所述 DPS机制下选择的所使用的单小区的下行功率参数发 送给所述终端。
9、 一种下行功率参数的配置装置, 包括: 基站功率参数配置和约束单元 以及基站功率参数选择和信令下发单元, 其中:
所述基站功率参数配置和约束单元设置成: 为终端所在的协作多点
CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数; 以及 所述基站功率参数选择和信令下发单元设置成: 向所述终端通知所述下 行功率参数。
10、 如权利要求 9所述的装置, 其中:
所述基站功率参数配置和约束单元是设置成以如下方式为终端所在的 CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的联合发送 JT机制时,配置所述终端的主小区和协作小区 釆用相同的不同符号之间的功率比。
11、 如权利要求 9所述的装置, 其中:
所述下行功率参数包含小区特定参数 PB;
所述基站功率参数配置和约束单元是设置成以如下方式为终端所在的 CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的联合发送 JT机制时,配置所述终端的主小区和协作小区 釆用相同的 PB
12、 如权利要求 9所述的装置, 其中:
所述基站功率参数配置和约束单元是设置成以如下方式为终端所在的 CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的动态点选择 DPS机制时,配置所述终端的主小区和协作 小区釆用相同的参考信号功率参数、 相同的含有 CRS的 OFDM符号功率参 数, 以及相同的不含有 CRS的 OFDM符号功率参数。
13、 如权利要求 9所述的装置, 其中:
所述下行功率参数包含小区特定参数 PB、小区特定参数参考信号功率 PRS 和终端特定参数 PA;
所述基站功率参数配置和约束单元是设置成以如下方式为终端所在的
CoMP集合中的所述终端的主小区和协作小区均配置下行功率参数:
在釆用 CoMP的动态点选择 DPS机制时,配置所述终端的主小区和协作 小区釆用相同的 PB、 PRS和 PA; 或者,
为所述终端的主小区配置下行功率参数和为所述终端的协作小区配置下 行功率参数, 并在选择所使用的单小区后, 将所述终端的主小区的下行功率 参数修改为选择的所使用的单小区的下行功率参数; 或者,
为所述终端的主小区和协作小区配置各自独立的下行功率参数。
14、 如权利要求 13所述的装置, 其中:
所述基站功率参数选择和信令下发单元是设置成以如下方式向所述终端 通知所述下行功率参数:
在所述基站功率参数配置和约束单元为所述终端的主小区和协作小区配 置各自独立的下行功率参数时, 将在所述 DPS机制下选择的所使用的单小区 的下行功率参数发送给所述终端。
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