WO2017036213A1 - 一种干扰检测方法和装置 - Google Patents

一种干扰检测方法和装置 Download PDF

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WO2017036213A1
WO2017036213A1 PCT/CN2016/084562 CN2016084562W WO2017036213A1 WO 2017036213 A1 WO2017036213 A1 WO 2017036213A1 CN 2016084562 W CN2016084562 W CN 2016084562W WO 2017036213 A1 WO2017036213 A1 WO 2017036213A1
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reference signal
cell reference
downlink cell
base station
signal
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PCT/CN2016/084562
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English (en)
French (fr)
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范毅
陈强
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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
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition

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  • This document relates to, but is not limited to, a wireless communication technology, and more particularly to an interference detection method and apparatus.
  • the frame structure of the TD-LTE (Time Division Long Term Evolution) system is shown in FIG. 1 in order to be able to be the same as the TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system.
  • Frequency coexistence special subframes are designed.
  • the special subframe is composed of DwPTS (Downlink Plot Time Slot), GP (Guard Period) and UpPTS (Uplink Plot Time Slot).
  • the total length of DwPTS, GP and UpPTS is equal to 1 millisecond (ms), and the lengths of DwPTS and UpPTS are configurable.
  • DwPTS is used to transmit downlink service data.
  • the DwPTS is generally configured with 9 to 10 symbols
  • the GP is generally configured with 2 to 3 symbols
  • the UpPTS is generally configured with 2 to 3 symbols.
  • the signal transmitted by a certain base station on the DwPTS generally does not cause too much delay and falls into other In the UpPTS of the base station or in the subsequent uplink service subframe, that is, the downlink transmission of the DwPTS of the TD-LTE base station does not interfere with the UpPTS and the uplink service subframe of the other base station (ie, the subframe 2 in FIG. 1). .
  • the propagation environment between base stations is very good.
  • the downlink signal transmission distance of TD-LTE base stations with high station erection reaches more than tens of kilometers.
  • the number of symbols set by the GP is small, and the guard interval is small.
  • the signals transmitted by the DwPTS of these TD-LTE overhead base stations generate uplink services of other base stations that are tens of kilometers away after a large delay.
  • Sub-frame (where the uplink service sub-frame includes the general name of the uplink pilot time slot and the subsequent uplink service sub-frame, the following are the same), so that the uplink service sub-frame of the remote TD-LTE base station will be filled with high-intensity interference. Affects the uplink access performance of these base stations. In severe cases, the uplink service subframes of these base stations are affected by high-intensity interference and lose service access capability. It is often difficult for network maintenance personnel to find out which base stations are interfered, resulting in maintainability of TD-LTE equipment. Poor performance, low efficiency in network performance issues.
  • the embodiment of the invention provides an interference detection method and device, which can enhance the maintainability of the TD-LTE device and improve the positioning efficiency of the network performance problem.
  • the embodiment of the invention provides an interference detection method, including:
  • the base station performs downlink cell reference signal CRS matching on the received signal in the uplink subframe. If the base station matches the downlink cell reference signal in the received signal in the uplink subframe, the base station outputs the downlink cell reference signal to generate the base station uplink subframe. Frame interference alarm.
  • the method further includes: calculating at least one of the following information of the matched downlink cell reference signal: a signal strength, an arrival delay position, and an arrival incoming direction.
  • the method further includes:
  • the base station After the base station matches the downlink cell reference signal in the received signal in the uplink subframe, before the base station outputs the downlink cell reference signal, the base station performs threshold determination on the signal strength of the matched cell reference signal. Determining that the signal strength of the matched downlink cell reference signal is greater than the threshold;
  • the outputting, by the base station, the downlink cell reference signal includes:
  • the base station outputs a downlink cell reference signal number CRS ID corresponding to the downlink cell reference signal.
  • the threshold is set to 6-10 dB.
  • the arrival delay position is determined by a method of shift correlation matching.
  • the downlink cell reference signal is one or more.
  • An embodiment of the present invention further provides an interference detecting apparatus, including:
  • a calculating unit configured to perform downlink cell reference signal matching on the received signal in the uplink subframe
  • the alarm judging unit is configured to: if there is a downlink cell in the received signal in the uplink subframe
  • the reference signal outputs the downlink cell reference signal to generate an uplink subframe interference alarm.
  • the device further includes:
  • the alarm information calculation unit is configured to calculate at least one of the following information of the matched downlink cell reference signal: a signal strength, an arrival delay position, and an arrival arrival direction.
  • the alarm determining unit is configured to:
  • the threshold of the matched cell reference signal is determined, and the signal strength of the matched downlink cell reference signal is determined.
  • the threshold is greater than the threshold; and the downlink cell reference signal number CRS ID corresponding to the downlink cell reference signal is output, and an uplink time slot interference alarm is generated.
  • the strength determination threshold of the matching result is set to 6 to 10 dB.
  • the alarm information calculation unit is configured to calculate an arrival delay position of the matched downlink cell reference signal by:
  • the arrival delay position is determined using a method of shift correlation matching.
  • the downlink cell reference signal is one or more.
  • the present application provides an information for the network maintenance personnel to use the information to discover, locate, and resolve the interference problem after outputting the UP time slot interference alarm and outputting the related alarm information for the base station having the interference phenomenon.
  • the network maintenance personnel can find out which base stations are interfered according to the information, where the interference source comes from, and enhance the TD. -
  • the maintainability of LTE devices improves the positioning efficiency of network performance problems.
  • 1 is a frame structure diagram of a TD-LTE system
  • FIG. 3 is a flowchart of an interference detecting method according to an embodiment of the present invention.
  • FIG. 4 is a structural diagram of an interference detecting apparatus according to an embodiment of the present invention.
  • Fig. 5 is a structural diagram of an interference detecting apparatus according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of an interference detection method according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step S202 The base station performs downlink reference signal matching on the received signal in the uplink subframe.
  • Step S204 If the base station matches the downlink reference signal in the received signal in the uplink subframe, the base station is interfered by the remote base station; and the base station outputs the downlink reference signal to generate the base station uplink time slot interference alarm.
  • the downlink reference signal may be a downlink cell reference signal (CRS, Cell Reference Signal).
  • a corresponding step can be added to estimate the location of the remote interfering base station, as shown in FIG.
  • Step S302 The base station performs downlink reference signal matching on the received signal in the uplink subframe.
  • Step S304 if the base station matches a downlink reference signal in the uplink received signal, indicating that the base station is interfered by the remote base station; the base station outputs the downlink reference signal to generate an uplink subframe interference alarm of the base station;
  • Step S306 the base station calculates at least one of the following information of the matched downlink reference signal: signal strength, arrival delay position, Direction of Arrival (DOA), and output alarm points.
  • the related information is analyzed, and the information about the alarm analysis includes the strength of the remote base station, the arrival delay position, and the direction of the incoming wave, which is used to estimate the location of the remote interfering base station, and provides assistance for the network maintenance personnel to use the information positioning.
  • step S302 the 504 cell reference signals are used to perform matching calculation on the received signals in the uplink time slot, and the matching result is calculated for each cell reference signal.
  • step S304 the base station matches the downlink cell reference signal in the received signal in the uplink subframe, and before the base station outputs the downlink cell reference signal, the base station further includes:
  • the base station performs threshold determination on the signal strength of the matched downlink cell reference signal, and determines that the signal strength of the matched downlink cell reference signal is greater than the threshold;
  • the base station outputting the downlink cell reference signal includes:
  • the base station outputs a downlink cell reference signal number CRS ID corresponding to the downlink cell reference signal.
  • the threshold can be set to 6 to 10 decibels (dB).
  • the method for shift correlation matching may be used to determine the arrival delay position of a downlink cell reference signal; after determining the arrival delay position of the downlink cell reference signal, the signal strength of the signal at the arrival delay position is performed. Calculating the signal strength of the downlink cell reference signal; if the base station is equipped with an array antenna, such as the 8-antenna line array commonly used in current TD-LTE base station equipment, the matching result on each antenna is integrated and according to the well-known GOB (fixed The beamforming algorithm (Grid of Beams) angle calculation method can calculate the direction of arrival (DOA) of the downlink cell reference signal. Using this information can help network maintenance personnel locate the location and distance of the access interference source.
  • Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions for performing any of the methods described above.
  • the apparatus includes: a calculating unit 402 configured to perform cell reference signal matching on a received signal in an uplink subframe; and an alarm determining unit 404 configured to: if there is a downlink in the received signal in the uplink time slot The cell reference signal outputs the downlink cell reference signal to generate an uplink subframe interference alarm.
  • the interference detecting apparatus further includes an alarm information calculating unit 506, and And determining at least one of the following information of the matched downlink cell reference signal: a signal strength, an arrival delay position, and an arrival incoming wave direction.
  • the alarm information calculation unit 506 is configured to calculate an arrival delay position of the matched downlink cell reference signal by using the following manner:
  • the arrival delay position is determined using a method of shift correlation matching.
  • the alarm determining unit 504 or the alarm determining unit 404 is configured to:
  • the threshold of the matched cell reference signal is determined, and the signal strength of the matched downlink cell reference signal is determined.
  • the threshold is greater than the threshold; and the downlink cell reference signal number CRS ID corresponding to the downlink cell reference signal is output, and an uplink time slot interference alarm is generated.
  • the network maintenance personnel can find out which base stations are interfered according to the information, and where the interference source comes from. It enhances the maintainability of TD-LTE devices and improves the positioning efficiency of network performance problems.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program in a storage and a memory by a processor. / instruction to achieve its corresponding function.
  • the invention is not limited to any particular form of hardware and software. Hehe.
  • the above technical solution enhances the maintainability of the TD-LTE device and improves the positioning efficiency of the network performance problem.

Abstract

一种基站干扰检测方法及装置，包括：基站对上行子帧中的接收信号进行下行小区参考信号CRS匹配；若所述基站匹配出上行子帧中的接收信号中存在下行小区参考信号，则基站输出该下行小区参考信号，产生基站上行子帧干扰告警。

Description

一种干扰检测方法和装置 技术领域
本文涉及但不限于一种无线通信技术，尤指一种干扰检测方法和装置。
背景技术
TD-LTE(时分双工长期演进，Time Division Long Term Evolution)系统的帧结构如图1所示，为了能够和TD-SCDMA(时分同步码分多址，Time Division Synchronous Code Division Multiple Access)系统同频共存，设计了特殊子帧。特殊子帧由DwPTS(下行导频时隙，Downlink Plot Time Slot)，GP(保护间隔，Guard Period)和UpPTS(上行导频时隙，Uplink Plot Time Slot)组成。DwPTS,GP and UpPTS的总长度等于1毫秒(ms)，DwPTS和UpPTS的长度可配置。
一般来说，DwPTS用来发射下行业务数据。为了提高频谱效率，增加小区吞吐量，商用配置情况下DwPTS一般配置为9～10个符号，GP一般配置为2～3个符号，UpPTS一般配置为2～3个符号。对于较小范围的TD-LTE基站群，由于DwPTS和UpPTS之间存在GP以作为信号的时延保护，所以某一基站在DwPTS上发射的信号一般不会产生太大的时延而落入其他基站的UpPTS内或者后续的上行业务子帧上，即一般情况下TD-LTE基站的DwPTS的下行发射不会对其他基站的UpPTS和上行业务子帧(即图1中的子帧2)生干扰。
但是对于大规模组网的TD-LTE基站群，由于基站间传播环境很好，某些情况下类似于自由空间传播，导致高站架设的TD-LTE基站的下行信号转播距离达到数十公里以上；并且为了提升小区吞吐量，GP设置的符号数较少，保护间隔较小，这些TD-LTE高架基站的DwPTS发射的信号产生大时延后会落入几十公里外的其他基站的上行业务子帧(此处上行业务子帧包括上行导频时隙和后续的上行业务子帧的统称，以下类同)，这样远处的TD-LTE基站的上行业务子帧将充满高强度的干扰，影响这些基站的上行接入性能。严重时，这些基站的上行业务子帧被大强度的干扰所影响而失去业务接入能力，而网络维护人员往往很难发现哪些基站被干扰，导致TD-LTE设备的可维护 性差，网络性能问题的定位效率低。
发明内容
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。
本发明实施例提出了一种干扰检测方法和装置，能够增强TD-LTE设备的可维护性，提高网络性能问题的定位效率。
本发明实施例提供了一种干扰检测方法，包括：
基站对上行子帧中的接收信号进行下行小区参考信号CRS匹配；若所述基站匹配出上行子帧中的接收信号中存在下行小区参考信号，则基站输出该下行小区参考信号，产生基站上行子帧干扰告警。
可选地，该方法还包括：计算匹配出的所述下行小区参考信号的下述信息至少之一：信号强度、到达延时位置、到达来波方向。
可选地，该方法还包括：
所述基站匹配出上行子帧中的接收信号中存在下行小区参考信号后，在所述基站输出该下行小区参考信号之前，所述基站对匹配出的所述小区参考信号的信号强度进行门限判断，判断出所述匹配出的下行小区参考信号的信号强度大于所述门限；
所述基站输出该下行小区参考信号包括：
所述基站输出所述下行小区参考信号对应的下行小区参考信号编号CRS ID。
可选地，所述门限设置为6～10dB。
可选地，所述到达延时位置采用移位相关匹配的方法确定。
可选地，所述下行小区参考信号为一个或多个。
本发明实施例还提供了一种干扰检测装置包含：
计算单元，设置为对上行子帧中的接收信号进行下行小区参考信号匹配；
告警判断单元，设置为若匹配出上行子帧中的接收信号中存在下行小区 参考信号，则输出该下行小区参考信号，产生上行子帧干扰告警。
可选地，所述装置还包含：
告警信息计算单元，设置为计算匹配出的所述下行小区参考信号的下述信息至少之一：信号强度、到达时延位置、到达来波方向。
可选地，所述告警判断单元是设置为：
设置为若匹配出上行子帧中的接收信号中存在下行小区参考信号，则对匹配出的所述小区参考信号的信号强度进行门限判断，判断出所述匹配出的下行小区参考信号的信号强度大于所述门限；输出所述下行小区参考信号对应的下行小区参考信号编号CRS ID，产生上行时隙干扰告警。
可选地，所述匹配结果的强度判断门限设置为6～10dB。
可选地，所述告警信息计算单元是设置为采用以下方式计算所述匹配出的下行小区参考信号的到达延时位置：
采用移位相关匹配的方法确定所述到达延时位置。
可选地，所述下行小区参考信号为一个或多个。
与相关技术相比，本申请对于存在干扰现象的基站输出UP时隙干扰告警并输出相关的告警信息后，为网络维护人员利用这些信息发现、定位和解决干扰问题提供信息。采用本发明实施例的方法，对于存在干扰现象的基站输出接入干扰告警并输出相关的告警信息后，网络维护人员根据这些信息就可以发现哪些基站被干扰，干扰源头来自何处，增强了TD-LTE设备的可维护性，提高了网络性能问题的定位效率。
本发明实施例的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明实施例的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1是TD-LTE系统的帧结构图；
图2是本发明实施例的干扰检测方法的流程图；
图3是本发明实施例的干扰检测方法的流程图；
图4是根据本发明实施例的干扰检测装置的结构图；
图5是根据本发明实施例的干扰检测装置的结构图。
本发明的实施方式
下面结合附图和具体实施例对本发明所述技术方案作进一步的详细描述，以使本领域的技术人员可以更好的理解本发明并能予以实施，但所举实施例不作为对本发明的限定。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组合。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
图2是本发明实施例干扰检测方法的流程图，如图2所示，该方法包括以下步骤：
步骤S202，基站对上行子帧中的接收信号进行下行参考信号匹配；
步骤S204，若基站匹配出上行子帧中的接收信号中存在某下行参考信号，说明该基站受到远端基站的干扰；则基站输出该下行参考信号，产生基站上行时隙干扰告警。
本步骤中，下行参考信号可以是下行小区参考信号(CRS，Cell Reference Signal)。
可选地，可增加相应的步骤，来估算远端干扰基站的位置，如图3所示。
步骤S302，基站对上行子帧中的接收信号进行下行参考信号匹配；
步骤S304，若基站匹配出上行接收信号中存在某下行参考信号，说明该基站受到远端基站的干扰；则基站输出该下行参考信号，产生基站上行子帧干扰告警；
步骤S306，基站计算匹配出的下行参考信号的下述信息至少之一：信号强度、到达时延位置、来波方向(DOA，Direction of Arrival)，输出告警分 析相关信息，所述告警分析相关信息包括远端基站的强度，到达时延位置，来波方向，用来估算远端干扰基站的位置，为网络维护人员利用这些信息定位提供帮助。
TD-LTE系统的小区参考信号共有504个，以CRS ID0至ID503编号。所以在步骤S302中，用这504个小区参考信号对上行时隙中的接收信号分别进行匹配计算，对每个小区参考信号均计算出匹配结果。
在步骤S304中，基站匹配出上行子帧中的接收信号中存在下行小区参考信号后，在所述基站输出该下行小区参考信号之前还包括：
所述基站对匹配出的下行小区参考信号的信号强度进行门限判断，判断出匹配出的下行小区参考信号的信号强度大于所述门限；
基站输出该下行小区参考信号包括：
基站输出下行小区参考信号对应的下行小区参考信号编号CRS ID。
其中，门限可以设置为6～10分贝(dB)。
在步骤S306中，可以用移位相关匹配的方法确定某一下行小区参考信号的到达延时位置；确定下行小区参考信号的到达延时位置后，对该到达延时位置上的信号进行信号强度计算可以获得该下行小区参考信号的信号强度；如果基站配备了阵列天线，比如目前TD-LTE基站配备中常见的8天线线阵，综合每一个天线上的匹配结果并根据众说周知的GOB(固定波束赋形算法，Grid of Beams)角度计算方法，可以计算出该下行小区参考信号的来波方向(DOA)。利用这些信息可以帮助网络维护人员定位接入干扰源头的方位和距离。
本发明实施例还提出了一种计算机可读存储介质，存储有计算机可执行指令，计算机可执行指令用于执行上述描述的任意一个方法。
图4是本发明实施例干扰检测装置的结构图。如图4所示，该装置包括：计算单元402，设置为对上行子帧中的接收信号进行小区参考信号匹配；告警判断单元404，设置为若匹配出上行时隙中的接收信号中存在下行小区参考信号，则输出该下行小区参考信号，产生上行子帧干扰告警。
可选地，如图5所示，干扰检测装置还包括告警信息计算单元506，设 置为计算匹配出的所述下行小区参考信号的下述信息至少之一：信号强度、到达延时位置、到达来波方向。
可选的，告警信息计算单元506是设置为采用以下方式计算所述匹配出的下行小区参考信号的到达延时位置：
采用移位相关匹配的方法确定所述到达延时位置。
可选的，告警判断单元504或告警判断单元404是设置为：
设置为若匹配出上行子帧中的接收信号中存在下行小区参考信号，则对匹配出的所述小区参考信号的信号强度进行门限判断，判断出所述匹配出的下行小区参考信号的信号强度大于所述门限；输出所述下行小区参考信号对应的下行小区参考信号编号CRS ID，产生上行时隙干扰告警。
综上所述，采用本发明实施例，对于存在干扰现象的基站输出上行子帧干扰告警并输出相关的告警信息后，网络维护人员根据这些信息就可以发现哪些基站被干扰，干扰源头来自何处，增强了TD-LTE设备的可维护性和提高网络性能问题的定位效率。
本发明实施例中所描述的每一种单元、模块仅是根据其功能进行划分的一种示例，可理解地，在系统/装置/设备实现相同功能的情况下，本领域技术人员可给出一种或多种其他功能划分方式，在具体应用时可将其中任意一个或多个功能模块采用一个功能实体装置或单元实现，不可否认地，以上变换方式均在本申请保护范围之内。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储与存储器中的程序/指令来实现其相应功能。本发明不限于任何特定形式的硬件和软件的结 合。
虽然本发明所揭露的实施方式如上，但所述的内容仅为便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属领域内的技术人员，在不脱离本发明所揭露的精神和范围的前提下，可以在实施的形式及细节上进行任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。
工业实用性
上述技术方案增强了TD-LTE设备的可维护性，提高了网络性能问题的定位效率。

Claims (12)

  1. 一种干扰检测方法，包括：
    基站对上行子帧中的接收信号进行下行小区参考信号CRS匹配；
    若所述基站匹配出上行子帧中的接收信号中存在下行小区参考信号，则基站输出该下行小区参考信号，产生基站上行时隙干扰告警。
  2. 如权利要求1所述的方法，该方法还包括：
    所述基站计算匹配出的所述下行小区参考信号的下述信息至少之一：信号强度、到达延时位置、到达来波方向。
  3. 如权利要求2所述的方法，所述到达延时位置采用移位相关匹配的方法确定。
  4. 如权利要求1所述的方法，该方法还包括：
    所述基站匹配出上行子帧中的接收信号中存在下行小区参考信号后，在所述基站输出该下行小区参考信号之前，所述基站对匹配出的所述小区参考信号的信号强度进行门限判断，判断出所述匹配出的下行小区参考信号的信号强度大于所述门限；
    所述基站输出该下行小区参考信号包括：
    所述基站输出所述下行小区参考信号对应的下行小区参考信号编号CRSID。
  5. 如权利要求4所述的方法，所述门限设置为6～10分贝dB。
  6. 如权利要求1所述的方法，所述下行小区参考信号为一个或多个。
  7. 一种干扰检测装置，包含：
    计算单元，设置为对上行子帧中的接收信号进行下行小区参考信号匹配；
    告警判断单元，设置为若匹配出上行子帧中的接收信号中存在下行小区参考信号，则输出该下行小区参考信号，产生上行时隙干扰告警。
  8. 如权利要求7所述的装置，所述装置还包含：
    告警信息计算单元，设置为计算匹配出的所述下行小区参考信号的下述 信息至少之一：信号强度、到达延时位置、到达来波方向。
  9. 如权利要求8所述的装置，其中，所述告警信息计算单元是设置为采用以下方式计算所述匹配出的下行小区参考信号的到达延时位置：
    采用移位相关匹配的方法确定所述到达延时位置。
  10. 如权利要求7所述的装置，其中，所述告警判断单元是设置为：
    设置为若匹配出上行子帧中的接收信号中存在下行小区参考信号，则对匹配出的所述小区参考信号的信号强度进行门限判断，判断出所述匹配出的下行小区参考信号的信号强度大于所述门限；输出所述下行小区参考信号对应的下行小区参考信号编号CRS ID，产生上行子帧干扰告警。
  11. 如权利要求10所述的装置，所述门限设置为6～10dB。
  12. 如权利要求7所述的装置，所述下行小区参考信号为一个或多个。
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