WO2017016303A1 - Method and apparatus for pre-compensating frequency offset - Google Patents

Method and apparatus for pre-compensating frequency offset Download PDF

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Publication number
WO2017016303A1
WO2017016303A1 PCT/CN2016/083526 CN2016083526W WO2017016303A1 WO 2017016303 A1 WO2017016303 A1 WO 2017016303A1 CN 2016083526 W CN2016083526 W CN 2016083526W WO 2017016303 A1 WO2017016303 A1 WO 2017016303A1
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Prior art keywords
frequency offset
compensation
mobile terminal
module
pdsch
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PCT/CN2016/083526
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French (fr)
Chinese (zh)
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范毅
陈强
曹琦
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中兴通讯股份有限公司
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Publication of WO2017016303A1 publication Critical patent/WO2017016303A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset

Definitions

  • the present invention relates to, but is not limited to, a wireless network transmission technology of a Long Term Evolution (LTE) system, and more particularly to a method and apparatus for frequency offset pre-compensation in a high-speed motion scenario of a mobile terminal.
  • LTE Long Term Evolution
  • the network scale is rapidly expanding, and LTE users in high-speed scenarios are also rapidly increasing.
  • the current speed of the high-speed rail can reach more than 350 km / h.
  • the Doppler frequency offset of the mobile terminal can reach 800 Hz or more.
  • the highest Doppler frequency offset is reachable. Above 1600Hz.
  • both the base station and the mobile terminal must estimate and correct the Doppler frequency offset by an algorithm to correctly demodulate the data.
  • the base station side its processing capability is strong, and there is no problem in frequency offset correction.
  • the mobile terminal side due to the processing capability of the mobile terminal, there may be cases where frequency offset estimation and frequency offset correction cannot be performed, resulting in easy off-network. Or the experience is very poor.
  • the embodiments of the present invention are directed to a frequency offset pre-compensation method and apparatus, which can perform Doppler frequency offset compensation in a high-speed scene of a mobile terminal.
  • the embodiment of the invention provides a frequency offset pre-compensation method, and the method includes:
  • the base station transmission mode When it is confirmed that the mobile terminal is in a high speed scenario, configure the base station transmission mode to be TM8;
  • RS downlink dedicated reference signal
  • PDSCH physical downlink shared channel
  • the downlink dedicated RS and PDSCH signals after the frequency offset pre-compensation are transmitted to the mobile terminal.
  • the confirming that the mobile terminal is in a high speed scenario includes:
  • the configuring the base station transmission mode to be TM8 includes:
  • the base station transmission mode is set to TM8 by sending an RRC Connection Reconfiguration message.
  • the performing frequency offset pre-compensation for the downlink dedicated RS and the PDSCH includes:
  • the method further includes:
  • the embodiment of the present invention further provides a frequency offset pre-compensation device, where the device includes: an acknowledgment module, a transmission mode configuration module, a frequency offset pre-compensation module, and a sending module, where
  • the confirmation module is configured to confirm whether the mobile terminal is in a high speed scene
  • the transmission mode configuration module is configured to configure the base station transmission mode to be TM8 when it is confirmed that the mobile terminal is in a high speed scenario
  • the frequency offset pre-compensation module is configured to perform frequency offset pre-compensation on a downlink dedicated reference signal (RS) and a physical downlink shared channel (PDSCH) signal;
  • RS downlink dedicated reference signal
  • PDSCH physical downlink shared channel
  • the transmitting module is configured to send a downlink dedicated RS and a PDSCH signal that are subjected to frequency offset pre-compensation to the mobile terminal.
  • the confirmation module is set to:
  • the transmission mode configuration module is configured to: configure the base station transmission mode to be TM8 by sending an RRC Connection Reconfiguration message.
  • the frequency offset pre-compensation module is set to:
  • the embodiment of the invention further provides a mobile terminal, including:
  • a receiving module configured to receive the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation
  • the signal processing module is configured to perform channel estimation according to the downlink dedicated RS after the frequency offset pre-compensation, and demodulate the PDSCH signal after the frequency offset pre-compensation.
  • the frequency offset pre-compensation method and device when confirming that the mobile terminal is in a high-speed scenario, configuring the base station transmission mode to be TM8; and performing frequency on the downlink dedicated reference signal (RS) and the physical downlink shared channel (PDSCH) signal Offset pre-compensation; transmitting the downlink dedicated RS and PDSCH signals subjected to the frequency offset pre-compensation to the mobile terminal.
  • the base station performs frequency offset compensation on the PDSCH signal in advance, thereby reducing the requirement for the frequency offset demodulation capability in the high-speed scene of the mobile terminal, avoiding the occurrence of the off-network phenomenon, and improving the user experience.
  • FIG. 1 is a schematic flow chart of a frequency offset pre-compensation method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a second frequency offset pre-compensation method according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a frequency offset pre-compensation device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • the downlink channel estimation by the mobile terminal mainly relies on the downlink reference signal (RS, Reference Signals) from the base station, and the downlink RS of the base station is applicable to the entire cell, and cannot be processed for a single mobile terminal.
  • RS downlink reference signal
  • frequency offset pre-compensation needs to be performed based on the downlink dedicated RS: when the base station confirms that the mobile terminal is in a high-speed scenario, the base station transmission mode is configured as TM8; and the base station performs frequency offset pre-compensation on the downlink dedicated RS and the PDSCH signal; And transmitting the downlink dedicated RS and PDSCH signals that are subjected to frequency offset pre-compensation to the mobile terminal.
  • the Doppler frequency offset of the downlink dedicated RS and PDSCH signals received by the mobile terminal is small or there is no Doppler frequency offset.
  • FIG. 1 is a schematic flowchart of a frequency offset pre-compensation method according to an embodiment of the present invention. As shown in FIG. 1 , the frequency offset pre-compensation method in this embodiment includes the following steps:
  • Step 101 The base station configures the base station transmission mode to be TM8 when it is confirmed that the mobile terminal is in a high speed scenario
  • the determining, by the base station, that the mobile terminal is in a high-speed scenario comprises: the base station estimating a Doppler frequency offset of the received uplink signal from the mobile terminal; and when the Doppler frequency offset of the uplink signal is higher than a preset threshold , the base station confirms that the mobile terminal is in a high speed scenario;
  • the preset threshold may be set according to actual requirements, such as setting the maximum value of the Doppler frequency offset that most mobile terminals can bear or process as the base station side without leaving the network or affecting the user experience.
  • the preset threshold is not specifically limited in the embodiment of the present invention, and any formally determined preset threshold belongs to the protection scope of the present invention.
  • the configuring the mobile terminal to transmit the mode to the TM8 includes: the base station, by transmitting a radio resource control connection reconfiguration message (RRC Connection Reconfiguration) message, configuring the mobile terminal to transmit the mode to the TM8; wherein the TM8 mode is the dual stream Beamforming mode.
  • RRC Connection Reconfiguration radio resource control connection reconfiguration message
  • Step 102 The base station performs frequency offset pre-compensation on the downlink dedicated reference signal (RS) and the physical downlink shared channel (PDSCH) signal.
  • RS downlink dedicated reference signal
  • PDSCH physical downlink shared channel
  • Performing frequency offset pre-compensation for the downlink dedicated RS and the PDSCH by the base station includes: the base station real-time estimation of the received Doppler frequency offset of the uplink signal from the mobile terminal, according to the Doppler frequency offset of the uplink signal,
  • the downlink dedicated RS and PDSCH signals are subjected to frequency offset pre-compensation.
  • Step 103 The base station sends the downlink dedicated RS and PDSCH signals that are subjected to frequency offset pre-compensation to the mobile terminal.
  • the mobile terminal after receiving the downlink dedicated RS and the PDSCH signal after the frequency offset pre-compensation, the mobile terminal performs channel estimation according to the downlink dedicated RS that performs the frequency offset pre-compensation, and demodulates the performing. Pre-compensated PDSCH signal with frequency offset.
  • the frequency offset pre-compensation method according to the embodiment of the present invention includes the following steps:
  • Step 201 The mobile terminal initiates a service.
  • the high-speed mobile LTE mobile terminal in this step initiates a service according to a normal process, and sends an uplink signal to the base station;
  • Step 202 The base station estimates a Doppler frequency offset of the uplink signal sent by the mobile terminal.
  • Step 203 Determine whether the Doppler frequency offset of the uplink signal of the mobile terminal is higher than a preset threshold. When the Doppler frequency offset of the uplink signal of the mobile terminal is higher than a preset threshold, it is considered to be moving at this time. If the terminal is in a high-speed moving scenario, step 204 is performed; when the Doppler frequency offset of the uplink signal of the mobile terminal is not higher than a preset threshold, step 210 is performed, and the process ends;
  • the preset threshold may be set according to actual requirements, such as setting the maximum value of the Doppler frequency offset that most mobile terminals can bear or process as the base station side without leaving the network or affecting the user experience. Preset threshold.
  • Step 204 The base station sends an RRC Connection Reconfiguration message, and configures the base station transmission mode to be TM8.
  • the TM8 mode is a dual stream Beamforming mode.
  • Step 205 The base station estimates a Doppler frequency offset of the uplink signal in real time.
  • Step 206 The base station performs frequency offset pre-compensation on the downlink dedicated RS and the PDSCH according to the Doppler frequency offset of the uplink signal.
  • Step 207 The base station sends the downlink dedicated RS and the PDSCH after the frequency offset pre-compensation to the mobile terminal.
  • Step 208 The mobile terminal receives the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
  • Step 209 The mobile terminal performs channel estimation according to the downlink dedicated RS, and demodulates the PDSCH signal after performing frequency offset pre-compensation;
  • Step 210 The process ends.
  • FIG. 3 is a schematic structural diagram of a frequency offset pre-compensation device according to an embodiment of the present invention. As shown in FIG. 3, the device includes a confirmation module 31. a transmission mode configuration module 32, a frequency offset pre-compensation module 33, and a transmitting module 34, wherein
  • the confirmation module 31 is configured to confirm whether the mobile terminal is in a high speed scene
  • the confirmation module 31 is configured to: estimate a Doppler frequency offset of the received uplink signal from the mobile terminal; when the Doppler frequency offset of the uplink signal is higher than a preset threshold, Then confirm that the mobile terminal is in a high speed scene.
  • the preset threshold may be set according to actual requirements, such as setting the maximum value of the Doppler frequency offset that most mobile terminals can bear or process as the base station side without leaving the network or affecting the user experience.
  • the preset threshold is not specifically limited in the embodiment of the present invention, and any formally determined preset threshold belongs to the protection scope of the present invention.
  • the transmission mode configuration module 32 is configured to configure the base station transmission mode to be TM8 when it is confirmed that the mobile terminal is in a high speed scenario;
  • the transmission mode configuration module 32 is configured to: configure the base station transmission mode to be TM8 by sending an RRC Connection Reconfiguration message; wherein the TM8 mode is a dual-stream Beamforming mode.
  • the frequency offset pre-compensation module 33 is configured to perform frequency offset pre-compensation on a downlink dedicated reference signal (RS) and a physical downlink shared channel (PDSCH) signal;
  • RS downlink dedicated reference signal
  • PDSCH physical downlink shared channel
  • the frequency offset pre-compensation module 33 is configured to: receive real-time estimation Doppler frequency offset of the uplink signal from the mobile terminal; performing frequency offset pre-compensation on the downlink dedicated RS and PDSCH signals according to the Doppler frequency offset of the uplink signal.
  • the sending module 34 is configured to send the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation to the mobile terminal.
  • the embodiment of the present invention further provides a mobile terminal.
  • the mobile terminal includes a receiving module, and a signal processing module.
  • the receiving module is configured to receive the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
  • the signal processing module is configured to perform channel estimation according to the downlink dedicated RS after performing frequency offset pre-compensation, and demodulate the PDSCH signal after performing frequency offset pre-compensation.
  • each processing module in the frequency offset precompensation device shown in FIG. 3 can be understood by referring to the related description of the frequency offset precompensation method. It should be understood by those skilled in the art that the function of each processing module in the frequency offset precompensation device shown in FIG. 3 can be implemented by a program running on a processor, or can be implemented by a specific logic circuit, for example, can be centrally Processor (CPU), microprocessor (MPU), digital signal processor (DSP), or field programmable gate array (FPGA) implementation.
  • CPU centrally Processor
  • MPU microprocessor
  • DSP digital signal processor
  • FPGA field programmable gate array
  • the disclosed method and apparatus may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules is only a logical function division.
  • there may be another division manner for example, multiple modules or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the communication connections between the various components shown or discussed may be indirect coupling or communication connections through some interfaces, devices or modules, and may be electrical, mechanical or otherwise.
  • the modules described above as separate components may or may not be physically separated.
  • the components displayed as modules may or may not be physical modules, that is, may be located in one place or distributed to multiple network modules; Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional module in each embodiment of the present invention may be integrated into one processing module.
  • each module may be separately used as one module, or two or more modules may be integrated into one module; the integrated module may be implemented in the form of hardware or in the form of hardware plus software function modules. achieve.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a removable storage device, a read-only memory (ROM), a magnetic disk or an optical disk, and the like, which can store a program code.
  • ROM read-only memory
  • the above-described integrated module of the embodiment of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in each embodiment of the present invention.
  • the foregoing storage medium includes: a plurality of media that can store program codes, such as a mobile storage device, a ROM, a magnetic disk, or an optical disk.
  • the present invention is an example of the frequency offset pre-compensation method and apparatus described in the examples, but the above embodiments are taken as an example, but the invention is not limited thereto, and those skilled in the art should understand that the technical solutions described in the foregoing embodiments can still be performed. Modifications, or equivalents to some or all of the technical features, and the modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present invention.
  • the foregoing technical solution can reduce the requirement of the frequency offset demodulation capability in the high-speed scene of the mobile terminal, avoid the occurrence of the off-network phenomenon, and improve the user experience.

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Abstract

A method and apparatus for pre-compensating a frequency offset. The method comprises: when it is confirmed that a mobile terminal is in a high-speed scenario, configuring a base station transmission mode as TM8; performing frequency offset pre-compensation on a downlink dedicated reference signal (RS) and a physical downlink shared channel (PDSCH) signal; and sending the downlink dedicated RS and the PDSCH signal after the frequency offset pre-compensation to the mobile terminal.

Description

一种频偏预补偿方法及装置Frequency offset pre-compensation method and device 技术领域Technical field
本文涉及但不限于长期演进(LTE，Long Term Evolution)系统的无线网络传输技术，尤其涉及一种在移动终端处于高速运动场景下的频偏预补偿的方法和装置。The present invention relates to, but is not limited to, a wireless network transmission technology of a Long Term Evolution (LTE) system, and more particularly to a method and apparatus for frequency offset pre-compensation in a high-speed motion scenario of a mobile terminal.
背景技术Background technique
随着LTE技术和移动终端产业链不断成熟和完善，网络规模在迅速扩大，高速场景下的LTE用户也在急速增加。如目前的高铁时速可以达到350公里/小时以上，在这一高速场景下，移动终端的多普勒频偏可达800Hz以上，对于两个小区重叠覆盖的区域，最高多普勒频偏可达1600Hz以上。As the LTE technology and the mobile terminal industry chain continue to mature and improve, the network scale is rapidly expanding, and LTE users in high-speed scenarios are also rapidly increasing. For example, the current speed of the high-speed rail can reach more than 350 km / h. In this high-speed scene, the Doppler frequency offset of the mobile terminal can reach 800 Hz or more. For the overlapping coverage area of two cells, the highest Doppler frequency offset is reachable. Above 1600Hz.
高速场景下，基站和移动终端都必须通过算法对多普勒频偏进行估计和纠正，才能正确解调数据。对于基站侧，其处理能力强大，频偏纠正不存在问题，但对于移动终端侧，受限于移动终端的处理能力，可能存在无法进行频偏估计和频偏纠正的情况，从而导致容易脱网或者体验很差。In high-speed scenarios, both the base station and the mobile terminal must estimate and correct the Doppler frequency offset by an algorithm to correctly demodulate the data. For the base station side, its processing capability is strong, and there is no problem in frequency offset correction. However, for the mobile terminal side, due to the processing capability of the mobile terminal, there may be cases where frequency offset estimation and frequency offset correction cannot be performed, resulting in easy off-network. Or the experience is very poor.
发明内容Summary of the invention
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.
有鉴于此，本发明实施例期望提供一种频偏预补偿方法及装置，能够使移动终端高速场景下进行多普勒频偏补偿。In view of this, the embodiments of the present invention are directed to a frequency offset pre-compensation method and apparatus, which can perform Doppler frequency offset compensation in a high-speed scene of a mobile terminal.
本发明实施例的技术方案是这样实现的：The technical solution of the embodiment of the present invention is implemented as follows:
本发明实施例提供了一种频偏预补偿方法，所述方法包括：The embodiment of the invention provides a frequency offset pre-compensation method, and the method includes:
当确认移动终端处于高速场景时，配置基站传输模式为TM8；When it is confirmed that the mobile terminal is in a high speed scenario, configure the base station transmission mode to be TM8;
对下行专用参考信号(RS)和物理下行共享信道(PDSCH)信号进行 频偏预补偿；Performing downlink dedicated reference signal (RS) and physical downlink shared channel (PDSCH) signals Frequency offset pre-compensation;
将进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。The downlink dedicated RS and PDSCH signals after the frequency offset pre-compensation are transmitted to the mobile terminal.
上述方案中，所述确认移动终端处于高速场景包括：In the above solution, the confirming that the mobile terminal is in a high speed scenario includes:
估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
当所述上行信号的多普勒频偏高于预设阈值时，确认移动终端处于高速场景。When the Doppler frequency offset of the uplink signal is higher than a preset threshold, it is confirmed that the mobile terminal is in a high speed scene.
上述方案中，所述配置基站传输模式为TM8包括：In the foregoing solution, the configuring the base station transmission mode to be TM8 includes:
通过发送RRC Connection Reconfiguration消息，配置基站传输模式为TM8。The base station transmission mode is set to TM8 by sending an RRC Connection Reconfiguration message.
上述方案中，所述对下行专用RS和PDSCH进行频偏预补偿包括：In the foregoing solution, the performing frequency offset pre-compensation for the downlink dedicated RS and the PDSCH includes:
估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
根据所述上行信号的多普勒频偏，对所述下行专用RS和PDSCH信号进行频偏预补偿。Performing frequency offset pre-compensation on the downlink dedicated RS and PDSCH signals according to the Doppler frequency offset of the uplink signal.
上述方案中，所述方法还包括：In the above solution, the method further includes:
移动终端接收所述进行频偏预补偿后的下行专用RS和PDSCH信号；Receiving, by the mobile terminal, the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
根据所述进行频偏预补偿后的下行专用RS进行信道估计，并解调所述进行频偏预补偿后的PDSCH信号。Performing channel estimation based on the downlink dedicated RS after performing frequency offset pre-compensation, and demodulating the PDSCH signal subjected to frequency offset pre-compensation.
本发明实施例还提供了一种频偏预补偿装置，所述装置包括：确认模块、传输模式配置模块、频偏预补偿模块、发送模块，其中，The embodiment of the present invention further provides a frequency offset pre-compensation device, where the device includes: an acknowledgment module, a transmission mode configuration module, a frequency offset pre-compensation module, and a sending module, where
所述确认模块，设置为确认移动终端是否处于高速场景；The confirmation module is configured to confirm whether the mobile terminal is in a high speed scene;
所述传输模式配置模块，设置为当确认移动终端处于高速场景时，配置基站传输模式为TM8；The transmission mode configuration module is configured to configure the base station transmission mode to be TM8 when it is confirmed that the mobile terminal is in a high speed scenario;
所述频偏预补偿模块，设置为对下行专用参考信号(RS)和物理下行共享信道(PDSCH)信号进行频偏预补偿；The frequency offset pre-compensation module is configured to perform frequency offset pre-compensation on a downlink dedicated reference signal (RS) and a physical downlink shared channel (PDSCH) signal;
所述发送模块，设置为将进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。 The transmitting module is configured to send a downlink dedicated RS and a PDSCH signal that are subjected to frequency offset pre-compensation to the mobile terminal.
上述方案中，所述确认模块是设置为：In the above solution, the confirmation module is set to:
估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
当所述上行信号的多普勒频偏高于预设阈值时，则确认移动终端处于高速场景。When the Doppler frequency offset of the uplink signal is higher than a preset threshold, it is confirmed that the mobile terminal is in a high speed scene.
上述方案中，所述传输模式配置模块是设置为：通过发送RRC Connection Reconfiguration消息，配置基站传输模式为TM8。In the above solution, the transmission mode configuration module is configured to: configure the base station transmission mode to be TM8 by sending an RRC Connection Reconfiguration message.
上述方案中，所述频偏预补偿模块是设置为：In the above solution, the frequency offset pre-compensation module is set to:
估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
根据所述上行信号的多普勒频偏，对所述下行专用RS和PDSCH信号进行频偏预补偿。Performing frequency offset pre-compensation on the downlink dedicated RS and PDSCH signals according to the Doppler frequency offset of the uplink signal.
本发明实施例还提供了一种移动终端，包括：The embodiment of the invention further provides a mobile terminal, including:
接收模块，设置为接收所述进行频偏预补偿后的下行专用RS和PDSCH信号；a receiving module, configured to receive the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
信号处理模块，设置为根据所述进行频偏预补偿后的下行专用RS进行信道估计，并解调所述进行频偏预补偿后的PDSCH信号。The signal processing module is configured to perform channel estimation according to the downlink dedicated RS after the frequency offset pre-compensation, and demodulate the PDSCH signal after the frequency offset pre-compensation.
本发明实施例所提供的频偏预补偿方法及装置，当确认移动终端处于高速场景时，配置基站传输模式为TM8；对下行专用参考信号(RS)和物理下行共享信道(PDSCH)信号进行频偏预补偿；将所述进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。如此，通过基站预先对PDSCH信号进行频偏补偿，能够降低对移动终端高速场景下的频偏解调能力的要求，避免脱网现象发生，提高用户体验。The frequency offset pre-compensation method and device provided by the embodiment of the present invention, when confirming that the mobile terminal is in a high-speed scenario, configuring the base station transmission mode to be TM8; and performing frequency on the downlink dedicated reference signal (RS) and the physical downlink shared channel (PDSCH) signal Offset pre-compensation; transmitting the downlink dedicated RS and PDSCH signals subjected to the frequency offset pre-compensation to the mobile terminal. In this way, the base station performs frequency offset compensation on the PDSCH signal in advance, thereby reducing the requirement for the frequency offset demodulation capability in the high-speed scene of the mobile terminal, avoiding the occurrence of the off-network phenomenon, and improving the user experience.
在阅读并理解了附图和详细描述后，可以明白其他方面。Other aspects will be apparent upon reading and understanding the drawings and detailed description.
附图概述BRIEF abstract
图1为本发明实施例一频偏预补偿方法流程示意图；1 is a schematic flow chart of a frequency offset pre-compensation method according to an embodiment of the present invention;
图2为本发明实施例二频偏预补偿方法流程示意图；2 is a schematic flowchart of a second frequency offset pre-compensation method according to an embodiment of the present invention;
图3为本发明实施例频偏预补偿装置结构示意图； 3 is a schematic structural diagram of a frequency offset pre-compensation device according to an embodiment of the present invention;
图4为本发明实施例移动终端结构示意图。FIG. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
本发明的实施方式Embodiments of the invention
在LTE系统中，移动终端进行下行信道估计主要依靠来自于基站的下行参考信号(RS，Reference Signals)，而基站的下行RS是适用于整个小区的，无法针对单独一个移动终端进行处理。In the LTE system, the downlink channel estimation by the mobile terminal mainly relies on the downlink reference signal (RS, Reference Signals) from the base station, and the downlink RS of the base station is applicable to the entire cell, and cannot be processed for a single mobile terminal.
因此，本发明实施例中，需要基于下行专用RS进行频偏预补偿：当基站确认移动终端处于高速场景时，配置基站传输模式为TM8；基站对下行专用RS和PDSCH信号进行频偏预补偿；将所述进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。如此，移动终端接收到的下行专用RS和PDSCH信号的多普勒频偏很小或者已经没有多普勒频偏。Therefore, in the embodiment of the present invention, frequency offset pre-compensation needs to be performed based on the downlink dedicated RS: when the base station confirms that the mobile terminal is in a high-speed scenario, the base station transmission mode is configured as TM8; and the base station performs frequency offset pre-compensation on the downlink dedicated RS and the PDSCH signal; And transmitting the downlink dedicated RS and PDSCH signals that are subjected to frequency offset pre-compensation to the mobile terminal. As such, the Doppler frequency offset of the downlink dedicated RS and PDSCH signals received by the mobile terminal is small or there is no Doppler frequency offset.
下面结合附图及具体实施例，对本发明技术方案的实施作进一步的详细描述。图1为本发明实施例一频偏预补偿方法流程示意图，如图1所示，本实施例频偏预补偿方法包括以下步骤：The implementation of the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. FIG. 1 is a schematic flowchart of a frequency offset pre-compensation method according to an embodiment of the present invention. As shown in FIG. 1 , the frequency offset pre-compensation method in this embodiment includes the following steps:
步骤101：基站当确认移动终端处于高速场景时，配置基站传输模式为TM8；Step 101: The base station configures the base station transmission mode to be TM8 when it is confirmed that the mobile terminal is in a high speed scenario;
本步骤中，所述基站确认移动终端处于高速场景包括：基站估计接收到的来自移动终端的上行信号的多普勒频偏；当所述上行信号的多普勒频偏高于预设阈值时，则基站确认移动终端处于高速场景；In this step, the determining, by the base station, that the mobile terminal is in a high-speed scenario comprises: the base station estimating a Doppler frequency offset of the received uplink signal from the mobile terminal; and when the Doppler frequency offset of the uplink signal is higher than a preset threshold , the base station confirms that the mobile terminal is in a high speed scenario;
其中所述预设阈值可以根据实际需求进行设定，如设定在不脱网或者不影响用户体验前提下，大多数移动终端能够承受或处理的多普勒频偏的最大值作为基站侧的预设阈值，本发明实施例不对预设阈值进行具体限定，任何形式确定的预设阈值均属于本发明的保护范围。The preset threshold may be set according to actual requirements, such as setting the maximum value of the Doppler frequency offset that most mobile terminals can bear or process as the base station side without leaving the network or affecting the user experience. The preset threshold is not specifically limited in the embodiment of the present invention, and any formally determined preset threshold belongs to the protection scope of the present invention.
所述配置移动终端的传输模式为TM8包括：基站通过发送无线资源控制连接重配置消息(RRC Connection Reconfiguration)消息，配置移动终端的传输模式为TM8；其中，所述TM8模式为双流Beamforming模式。The configuring the mobile terminal to transmit the mode to the TM8 includes: the base station, by transmitting a radio resource control connection reconfiguration message (RRC Connection Reconfiguration) message, configuring the mobile terminal to transmit the mode to the TM8; wherein the TM8 mode is the dual stream Beamforming mode.
步骤102：基站对下行专用参考信号(RS)和物理下行共享信道(PDSCH)信号进行频偏预补偿； Step 102: The base station performs frequency offset pre-compensation on the downlink dedicated reference signal (RS) and the physical downlink shared channel (PDSCH) signal.
所述基站对下行专用RS和PDSCH进行频偏预补偿包括：基站实时估计接收到的来自移动终端的上行信号的多普勒频偏，根据所述上行信号的多普勒频偏，对所述下行专用RS和PDSCH信号进行频偏预补偿。Performing frequency offset pre-compensation for the downlink dedicated RS and the PDSCH by the base station includes: the base station real-time estimation of the received Doppler frequency offset of the uplink signal from the mobile terminal, according to the Doppler frequency offset of the uplink signal, The downlink dedicated RS and PDSCH signals are subjected to frequency offset pre-compensation.
步骤103：基站将所述进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。Step 103: The base station sends the downlink dedicated RS and PDSCH signals that are subjected to frequency offset pre-compensation to the mobile terminal.
本发明实施例中，所述移动终端接收到进行频偏预补偿后的下行专用RS和PDSCH信号后，根据所述进行频偏预补偿后的下行专用RS进行信道估计，并解调所述进行频偏预补偿后的PDSCH信号。In the embodiment of the present invention, after receiving the downlink dedicated RS and the PDSCH signal after the frequency offset pre-compensation, the mobile terminal performs channel estimation according to the downlink dedicated RS that performs the frequency offset pre-compensation, and demodulates the performing. Pre-compensated PDSCH signal with frequency offset.
图2为本发明实施例二频偏预补偿方法流程示意图，如图2所示，本发明实施例所述频偏预补偿方法包括以下步骤：2 is a schematic flowchart of a frequency offset pre-compensation method according to an embodiment of the present invention. As shown in FIG. 2, the frequency offset pre-compensation method according to the embodiment of the present invention includes the following steps:
步骤201：移动终端发起业务；Step 201: The mobile terminal initiates a service.
本步骤中所述高速移动的LTE移动终端按照正常流程发起业务，发送上行信号到基站；The high-speed mobile LTE mobile terminal in this step initiates a service according to a normal process, and sends an uplink signal to the base station;
步骤202：基站估计所述移动终端发送的上行信号的多普勒频偏；Step 202: The base station estimates a Doppler frequency offset of the uplink signal sent by the mobile terminal.
步骤203：判断所述移动终端的上行信号的多普勒频偏是否高于预设阈值，当所述移动终端的上行信号的多普勒频偏高于预设阈值时，则认为此时移动终端处于高速移动的场景下，则执行步骤204；当所述移动终端的上行信号的多普勒频偏不高于预设阈值时，执行步骤210，本流程结束；Step 203: Determine whether the Doppler frequency offset of the uplink signal of the mobile terminal is higher than a preset threshold. When the Doppler frequency offset of the uplink signal of the mobile terminal is higher than a preset threshold, it is considered to be moving at this time. If the terminal is in a high-speed moving scenario, step 204 is performed; when the Doppler frequency offset of the uplink signal of the mobile terminal is not higher than a preset threshold, step 210 is performed, and the process ends;
其中所述预设阈值可以根据实际需求进行设定，如设定在不脱网或者不影响用户体验前提下，大多数移动终端能够承受或处理的多普勒频偏的最大值作为基站侧的预设阈值。The preset threshold may be set according to actual requirements, such as setting the maximum value of the Doppler frequency offset that most mobile terminals can bear or process as the base station side without leaving the network or affecting the user experience. Preset threshold.
步骤204：基站发送RRC Connection Reconfiguration消息，配置基站传输模式为TM8；Step 204: The base station sends an RRC Connection Reconfiguration message, and configures the base station transmission mode to be TM8.
其中，所述TM8模式为双流Beamforming模式The TM8 mode is a dual stream Beamforming mode.
步骤205：基站实时估计所述上行信号的多普勒频偏；Step 205: The base station estimates a Doppler frequency offset of the uplink signal in real time.
步骤206：基站根据所述上行信号的多普勒频偏，对下行专用RS和PDSCH进行频偏预补偿； Step 206: The base station performs frequency offset pre-compensation on the downlink dedicated RS and the PDSCH according to the Doppler frequency offset of the uplink signal.
步骤207：基站将进行频偏预补偿后的下行专用RS和PDSCH发送到移动终端；Step 207: The base station sends the downlink dedicated RS and the PDSCH after the frequency offset pre-compensation to the mobile terminal.
步骤208：移动终端接收所述进行频偏预补偿后的下行专用RS和PDSCH信号；Step 208: The mobile terminal receives the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
步骤209：移动终端根据下行专用RS进行信道估计，并解调进行频偏预补偿后的PDSCH信号；Step 209: The mobile terminal performs channel estimation according to the downlink dedicated RS, and demodulates the PDSCH signal after performing frequency offset pre-compensation;
步骤210：本流程结束。Step 210: The process ends.
本发明实施例还提供了一种频偏预补偿装置，所述装置位于基站侧，图3为本发明实施例频偏预补偿装置结构示意图，如图3所示，所述装置包括确认模块31、传输模式配置模块32、频偏预补偿模块33、发送模块34，其中，The embodiment of the present invention further provides a frequency offset pre-compensation device, which is located at the base station side. FIG. 3 is a schematic structural diagram of a frequency offset pre-compensation device according to an embodiment of the present invention. As shown in FIG. 3, the device includes a confirmation module 31. a transmission mode configuration module 32, a frequency offset pre-compensation module 33, and a transmitting module 34, wherein
所述确认模块31，设置为确认移动终端是否处于高速场景；The confirmation module 31 is configured to confirm whether the mobile terminal is in a high speed scene;
本发明实施例中，所述确认模块31是设置为：估计接收到的来自移动终端的上行信号的多普勒频偏；当所述上行信号的多普勒频偏高于预设阈值时，则确认移动终端处于高速场景。In the embodiment of the present invention, the confirmation module 31 is configured to: estimate a Doppler frequency offset of the received uplink signal from the mobile terminal; when the Doppler frequency offset of the uplink signal is higher than a preset threshold, Then confirm that the mobile terminal is in a high speed scene.
其中所述预设阈值可以根据实际需求进行设定，如设定在不脱网或者不影响用户体验前提下，大多数移动终端能够承受或处理的多普勒频偏的最大值作为基站侧的预设阈值，本发明实施例不对预设阈值进行具体限定，任何形式确定的预设阈值均属于本发明的保护范围。The preset threshold may be set according to actual requirements, such as setting the maximum value of the Doppler frequency offset that most mobile terminals can bear or process as the base station side without leaving the network or affecting the user experience. The preset threshold is not specifically limited in the embodiment of the present invention, and any formally determined preset threshold belongs to the protection scope of the present invention.
所述传输模式配置模块32，设置为当确认移动终端处于高速场景时，配置基站传输模式为TM8；The transmission mode configuration module 32 is configured to configure the base station transmission mode to be TM8 when it is confirmed that the mobile terminal is in a high speed scenario;
本发明实施例中，所述传输模式配置模块32是设置为：通过发送RRC Connection Reconfiguration消息，配置基站传输模式为TM8；其中，所述TM8模式为双流Beamforming模式。In the embodiment of the present invention, the transmission mode configuration module 32 is configured to: configure the base station transmission mode to be TM8 by sending an RRC Connection Reconfiguration message; wherein the TM8 mode is a dual-stream Beamforming mode.
所述频偏预补偿模块33，设置为对下行专用参考信号(RS)和物理下行共享信道(PDSCH)信号进行频偏预补偿；The frequency offset pre-compensation module 33 is configured to perform frequency offset pre-compensation on a downlink dedicated reference signal (RS) and a physical downlink shared channel (PDSCH) signal;
本发明实施例中，所述频偏预补偿模块33是设置为：实时估计接收到 的来自所述移动终端的上行信号的多普勒频偏；根据所述上行信号的多普勒频偏，对所述下行专用RS和PDSCH信号进行频偏预补偿。In the embodiment of the present invention, the frequency offset pre-compensation module 33 is configured to: receive real-time estimation Doppler frequency offset of the uplink signal from the mobile terminal; performing frequency offset pre-compensation on the downlink dedicated RS and PDSCH signals according to the Doppler frequency offset of the uplink signal.
所述发送模块34，设置为将进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。The sending module 34 is configured to send the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation to the mobile terminal.
本发明实施例还提供了一种移动终端，如图4所示，所述移动终端包括接收模块，以及信号处理模块；The embodiment of the present invention further provides a mobile terminal. As shown in FIG. 4, the mobile terminal includes a receiving module, and a signal processing module.
所述接收模块，设置为接收所述进行频偏预补偿后的下行专用RS和PDSCH信号；The receiving module is configured to receive the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
所述信号处理模块，设置为根据所述进行频偏预补偿后的下行专用RS进行信道估计，并解调所述进行频偏预补偿后的PDSCH信号。The signal processing module is configured to perform channel estimation according to the downlink dedicated RS after performing frequency offset pre-compensation, and demodulate the PDSCH signal after performing frequency offset pre-compensation.
图3中所示的频偏预补偿装置中的每个处理模块的实现功能，可参照前述频偏预补偿方法的相关描述而理解。本领域技术人员应当理解，图3所示的频偏预补偿装置中每个处理模块的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现，比如：可由中央处理器(CPU)、微处理器(MPU)、数字信号处理器(DSP)、或现场可编程门阵列(FPGA)实现。The implementation function of each processing module in the frequency offset precompensation device shown in FIG. 3 can be understood by referring to the related description of the frequency offset precompensation method. It should be understood by those skilled in the art that the function of each processing module in the frequency offset precompensation device shown in FIG. 3 can be implemented by a program running on a processor, or can be implemented by a specific logic circuit, for example, can be centrally Processor (CPU), microprocessor (MPU), digital signal processor (DSP), or field programmable gate array (FPGA) implementation.
在本发明所提供的几个实施例中，应该理解到，所揭露的方法及装置，可以通过其他的方式实现。以上所描述的装置实施例仅仅是示意性的，例如，所述模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个模块或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的每个组成部分相互之间的通信连接可以是通过一些接口，设备或模块的间接耦合或通信连接，可以是电性的、机械的或其他形式的。In the several embodiments provided by the present invention, it should be understood that the disclosed method and apparatus may be implemented in other manners. The device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed. In addition, the communication connections between the various components shown or discussed may be indirect coupling or communication connections through some interfaces, devices or modules, and may be electrical, mechanical or otherwise.
上述作为分离部件说明的模块可以是、或也可以不是物理上分开的，作为模块显示的部件可以是、或也可以不是物理模块，即可以位于一个地方，也可以分布到多个网络模块上；可以根据实际的需要选择其中的部分或全部模块来实现本实施例方案的目的。The modules described above as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, may be located in one place or distributed to multiple network modules; Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
另外，在本发明各实施例中的各功能模块可以全部集成在一个处理模块 中，也可以是各模块分别单独作为一个模块，也可以两个或两个以上模块集成在一个模块中；上述集成的模块既可以采用硬件的形式实现，也可以采用硬件加软件功能模块的形式实现。In addition, each functional module in each embodiment of the present invention may be integrated into one processing module. In the middle, each module may be separately used as one module, or two or more modules may be integrated into one module; the integrated module may be implemented in the form of hardware or in the form of hardware plus software function modules. achieve.
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：移动存储设备、只读存储器(ROM，Read-Only Memory)、磁碟或者光盘等多种可以存储程序代码的介质。It will be understood by those skilled in the art that all or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a removable storage device, a read-only memory (ROM), a magnetic disk or an optical disk, and the like, which can store a program code.
或者，本发明实施例上述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明每个实施例所述方法的全部或部分。而前述的存储介质包括：移动存储设备、ROM、磁碟或者光盘等多种可以存储程序代码的介质。Alternatively, the above-described integrated module of the embodiment of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in each embodiment of the present invention. The foregoing storage medium includes: a plurality of media that can store program codes, such as a mobile storage device, a ROM, a magnetic disk, or an optical disk.
本发明是实例中记载的频偏预补偿方法、装置只以上述实施例为例，但不仅限于此，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。The present invention is an example of the frequency offset pre-compensation method and apparatus described in the examples, but the above embodiments are taken as an example, but the invention is not limited thereto, and those skilled in the art should understand that the technical solutions described in the foregoing embodiments can still be performed. Modifications, or equivalents to some or all of the technical features, and the modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present invention.
以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
工业实用性Industrial applicability
上述技术方案能够降低对移动终端高速场景下的频偏解调能力的要求，避免脱网现象发生，提高用户体验。 The foregoing technical solution can reduce the requirement of the frequency offset demodulation capability in the high-speed scene of the mobile terminal, avoid the occurrence of the off-network phenomenon, and improve the user experience.

Claims (10)

  1. 一种频偏预补偿方法，所述方法包括：A frequency offset pre-compensation method, the method comprising:
    当确认移动终端处于高速场景时，配置基站传输模式为TM8；When it is confirmed that the mobile terminal is in a high speed scenario, configure the base station transmission mode to be TM8;
    对下行专用参考信号(RS)和物理下行共享信道(PDSCH)信号进行频偏预补偿；Frequency offset pre-compensation for downlink dedicated reference signal (RS) and physical downlink shared channel (PDSCH) signals;
    将进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。The downlink dedicated RS and PDSCH signals after the frequency offset pre-compensation are transmitted to the mobile terminal.
  2. 根据权利要求1所述方法，其中，所述确认移动终端处于高速场景包括：The method of claim 1 wherein said confirming that the mobile terminal is in a high speed scene comprises:
    估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
    当所述上行信号的多普勒频偏高于预设阈值时，确认移动终端处于高速场景。When the Doppler frequency offset of the uplink signal is higher than a preset threshold, it is confirmed that the mobile terminal is in a high speed scene.
  3. 根据权利要求1所述方法，其中，所述配置基站传输模式为TM8包括：The method of claim 1, wherein the configuring the base station transmission mode to TM8 comprises:
    通过发送无线资源控制RRC连接重配置消息，配置基站传输模式为TM8。The RRC connection reconfiguration message is controlled by sending a radio resource, and the base station transmission mode is set to TM8.
  4. 根据权利要求1所述方法，其中，所述对下行专用RS和PDSCH进行频偏预补偿包括：The method of claim 1, wherein the performing frequency offset pre-compensation for the downlink dedicated RS and the PDSCH comprises:
    估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
    根据所述上行信号的多普勒频偏，对所述下行专用RS和PDSCH信号进行频偏预补偿。Performing frequency offset pre-compensation on the downlink dedicated RS and PDSCH signals according to the Doppler frequency offset of the uplink signal.
  5. 根据权利要求1至4任一项所述方法，所述方法还包括：A method according to any one of claims 1 to 4, the method further comprising:
    移动终端接收所述进行频偏预补偿后的下行专用RS和PDSCH信号；Receiving, by the mobile terminal, the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
    根据所述进行频偏预补偿后的下行专用RS进行信道估计，并解调所述进行频偏预补偿后的PDSCH信号。Performing channel estimation based on the downlink dedicated RS after performing frequency offset pre-compensation, and demodulating the PDSCH signal subjected to frequency offset pre-compensation.
  6. 一种频偏预补偿装置，所述装置包括：确认模块、传输模式配置模块、频偏预补偿模块、发送模块，其中， A frequency offset pre-compensation device, the device comprising: a confirmation module, a transmission mode configuration module, a frequency offset pre-compensation module, and a transmission module, wherein
    所述确认模块，设置为确认移动终端是否处于高速场景；The confirmation module is configured to confirm whether the mobile terminal is in a high speed scene;
    所述传输模式配置模块，设置为当确认移动终端处于高速场景时，配置基站传输模式为TM8；The transmission mode configuration module is configured to configure the base station transmission mode to be TM8 when it is confirmed that the mobile terminal is in a high speed scenario;
    所述频偏预补偿模块，设置为对下行专用参考信号(RS)和物理下行共享信道(PDSCH)信号进行频偏预补偿；The frequency offset pre-compensation module is configured to perform frequency offset pre-compensation on a downlink dedicated reference signal (RS) and a physical downlink shared channel (PDSCH) signal;
    所述发送模块，设置为将进行频偏预补偿后的下行专用RS和PDSCH信号发送到所述移动终端。The transmitting module is configured to send a downlink dedicated RS and a PDSCH signal that are subjected to frequency offset pre-compensation to the mobile terminal.
  7. 根据权利要求6所述装置，其中，所述确认模块是设置为：The apparatus of claim 6 wherein said validation module is configured to:
    估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
    当所述上行信号的多普勒频偏高于预设阈值时，则确认移动终端处于高速场景。When the Doppler frequency offset of the uplink signal is higher than a preset threshold, it is confirmed that the mobile terminal is in a high speed scene.
  8. 根据权利要求6所述装置，其中，所述传输模式配置模块是设置为：The apparatus of claim 6 wherein said transmission mode configuration module is configured to:
    通过发送无线资源控制RRC连接重配置消息，配置基站传输模式为TM8。The RRC connection reconfiguration message is controlled by sending a radio resource, and the base station transmission mode is set to TM8.
  9. 根据权利要求6所述装置，其中，所述频偏预补偿模块是设置为：The apparatus of claim 6 wherein said frequency offset precompensation module is configured to:
    估计接收到的来自移动终端的上行信号的多普勒频偏；Estimating a Doppler frequency offset of the received uplink signal from the mobile terminal;
    根据所述上行信号的多普勒频偏，对所述下行专用RS和PDSCH信号进行频偏预补偿。Performing frequency offset pre-compensation on the downlink dedicated RS and PDSCH signals according to the Doppler frequency offset of the uplink signal.
  10. 一种移动终端，包括：A mobile terminal includes:
    接收模块，设置为接收所述进行频偏预补偿后的下行专用RS和PDSCH信号；a receiving module, configured to receive the downlink dedicated RS and PDSCH signals after performing frequency offset pre-compensation;
    信号处理模块，设置为根据所述进行频偏预补偿后的下行专用RS进行信道估计，并解调所述进行频偏预补偿后的PDSCH信号。 The signal processing module is configured to perform channel estimation according to the downlink dedicated RS after the frequency offset pre-compensation, and demodulate the PDSCH signal after the frequency offset pre-compensation.
PCT/CN2016/083526 2015-07-29 2016-05-26 Method and apparatus for pre-compensating frequency offset WO2017016303A1 (en)

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