WO2018090814A1 - 基站干扰检测方法及装置 - Google Patents

基站干扰检测方法及装置 Download PDF

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Publication number
WO2018090814A1
WO2018090814A1 PCT/CN2017/108164 CN2017108164W WO2018090814A1 WO 2018090814 A1 WO2018090814 A1 WO 2018090814A1 CN 2017108164 W CN2017108164 W CN 2017108164W WO 2018090814 A1 WO2018090814 A1 WO 2018090814A1
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Prior art keywords
base station
received signal
signal strength
channel
interference
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PCT/CN2017/108164
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English (en)
French (fr)
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王许旭
王建锋
周瑞兴
吴广德
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中兴通讯股份有限公司
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Publication of WO2018090814A1 publication Critical patent/WO2018090814A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/29—Performance testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

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  • the present disclosure relates to the field of base stations and communication systems, and in particular, to a base station interference detection method and apparatus.
  • the positioning is external interference
  • RRU remote radio unit
  • the above solution can accurately determine whether the high RSSI phenomenon is a problem of the RRU, but the operability in the external field is low.
  • a method and apparatus for detecting base station interference can determine whether the cause of the high RSSI is external interference or internal interference.
  • a method for detecting a base station interference includes: detecting, by using a received signal strength of an uplink receiving channel of a base station, whether an interference event occurs; and when determining that an interference event has occurred, starting a self-test mode of the base station; After the base station self-test mode is activated, the first received signal strength of the base station uplink receiving channel and the second received signal strength of the partial receiving channel are obtained by detecting, under the condition that the base station transmitting channel is closed; according to the first received signal strength and the Second, the received signal strength is determined to originate from within the base station or from outside the base station.
  • the determining, by detecting the received signal strength of the uplink receiving channel of the base station, determining whether the interference event occurs includes: detecting a received signal of the uplink receiving channel of the base station in real time, and obtaining a received signal strength; if the real-time detected base station is uplinked If the received signal strength of the receiving channel is greater than the alarm threshold, it is determined that an interference event has occurred.
  • the first received signal strength of the uplink receiving channel of the base station and the second received signal strength of the partial receiving channel are obtained by detecting: detecting, by detecting, a channel between the circulator and the receiving module of the base station, detecting The first received signal strength of the uplink receiving channel of the base station including the antenna, the filter, the circulator, and the receiving module; detecting the partial receiving channel of the receiving module by controlling the channel disconnection between the circulator and the receiving module of the base station Second received signal strength.
  • the determining, according to the first received signal strength and the second received signal strength, that the interference originates from the inside of the base station or from the outside of the base station comprises: if the difference between the first received signal strength and the second received signal strength Within the preset range, it is determined that the interference originates from the inside of the base station, otherwise it is determined that the interference originates from outside the base station.
  • the first received signal strength and the second received signal strength are detected in the same time slot of the same frame, or the first received signal strength and the second received signal strength are respectively detected in the same time slot of different frames.
  • the base station transmit channel is only turned off in the receive time slot.
  • a storage medium stores a program for implementing the above-described base station interference detecting method.
  • a base station interference detecting apparatus includes: a digital processing module, configured to detect whether an interference event occurs by detecting a received signal strength of an uplink receiving channel of a base station, and when it is determined that an interference event has occurred, start a base station self-test mode; a control module, configured to: after starting the base station self-test mode, shutting down the base station transmit channel; wherein, after the control module has turned off the base station transmit channel, the digital module obtains the base station uplink receive channel by detecting The first received signal strength and the second received signal strength of the partial receiving channel, and based on the first received signal strength and the second received signal strength, determined that the interference originates from within the base station or originates from outside the base station.
  • the digital processing module detects the received signal of the uplink receiving channel of the base station in real time, and obtains the received signal strength. If the received signal strength of the uplink receiving channel of the base station is greater than the alarm threshold, the interference event is determined to have occurred. .
  • the digital processing module detects the uplink receiving channel of the base station including the antenna, the filter, the circulator, and the receiving module. Receiving a signal strength, and when the control module controls a channel disconnection between the circulator and the receiving module of the base station, the digital processing module detects a second received signal strength of a portion of the receiving channel including the receiving module.
  • the digital processing module determines that the interference originates from the inside of the base station when the difference between the first received signal strength and the second received signal strength is within a preset range, and otherwise determines that the interference originates from outside the base station.
  • the digital processing module detects the first received signal strength and the second received signal strength in the same time slot of the same frame, or detects the first received signal strength and the second respectively in the same time slot of different frames Receive signal strength.
  • the base station transmit channel is only turned off in the receive time slot.
  • the embodiment of the present disclosure adds a base station self-test mode based on the general RRU architecture.
  • the received signal strength of the receiving channel can be detected to determine whether the interference originates from outside or inside the base station, that is, whether it is external interference or the RRU itself.
  • the channel problem causes the RSSI to be high and the operability is high.
  • FIG. 1 is a block diagram of a method for detecting interference of a base station according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a base station interference detecting apparatus according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart of a self-test mode provided by an embodiment of the present disclosure.
  • FIG. 4 is a first timing diagram of a self-test mode provided by an embodiment of the present disclosure.
  • FIG. 5 is a second timing diagram of a self-test mode provided by an embodiment of the present disclosure.
  • FIG. 1 is a block diagram of a method for detecting interference of a base station according to an embodiment of the present disclosure. As shown in FIG. 1, the steps include:
  • Step S101 Determine whether an interference event occurs by detecting the received signal strength of the uplink receiving channel of the base station.
  • Step S101 includes: detecting a received signal of an uplink receiving channel of the base station in real time, and obtaining a received signal strength. If the received signal strength is greater than an alarm threshold, determining that an interference event has occurred. Wherein the received signal comprises a spatial signal and an entire receiver noise signal.
  • Step S102 When it is determined that an interference event has occurred, the base station self-test mode is started.
  • Step S103 After the base station self-test mode is activated, the first received signal strength of the base station uplink receiving channel and the second received signal strength of the partial receiving channel are obtained by detecting the base station transmitting channel.
  • Step S103 includes: to detect the received signal strength of the receiving channel, when the base station performs self-test, the base station transmitting channel needs to be closed. Then, by controlling the channel between the circulator and the receiving module of the base station to be turned on or off, respectively detecting the first received signal strength of the uplink receiving channel of the base station including the antenna, the filter, the circulator, and the receiving module, and including the receiving module Part of the receiving channel's second received signal strength.
  • the first received signal strength and the second received signal strength need to be detected in the receiving time slot, so it is necessary to control the transmitting channel to be powered off, and the receiving channel is powered on.
  • the first received signal of the complete base station uplink receiving channel is detected by controlling the path between the circulator and the receiving module to obtain a first received signal strength, and the first received signal includes a spatial signal and the entire receiving.
  • the machine noise signal by controlling the disconnection between the circulator and the receiving module, the second receiving signal of the partial receiving channel is detected, and the second received signal strength is obtained, and the path between the circulator and the receiving module is disconnected.
  • the second received signal does not include a spatial signal and a noise signal of the receiving channel between the circulator and the antenna.
  • first received signal strength and the second received signal strength may be detected in the same time slot of the same frame, and the first received signal strength and the second received may be separately detected in the same time slot of different frames. Signal strength.
  • the base station transmit channel may be turned off only in the receive time slot, and the first received signal strength and the second received signal strength may be detected, and in the transmit time slot, the base station transmit channel may be normally turned on, and the signal is sent. .
  • Step S104 Determine, according to the first received signal strength and the second received signal strength, that the interference originates from inside the base station or originates from outside the base station.
  • Step S104 includes: if the difference between the first received signal strength and the second received signal strength is within a preset range, determining that the interference originates from inside the base station, otherwise determining that the interference originates from outside the base station.
  • the embodiments of the present disclosure are applicable to interference detection of a base station RRU of a TDD system. By configuring the RRU remotely, the purpose of determining interference can be achieved.
  • steps S101 to S104 are included.
  • the storage medium may be a ROM/RAM, a magnetic disk, an optical disk, or the like.
  • the method includes: a digital processing module, a control module, a transmitting module, a receiving module, and a switch (ie, the switching module shown in FIG. 2), and high power. Load, circulator, filter, antenna.
  • the digital processing module converts the baseband data into an analog signal and transmits the signal to the transmitting module, and performs analog-to-digital conversion on the signal output by the receiving module and performs corresponding digital processing, and then transmits the signal to the baseband processing.
  • the transmitter module After the transmitter module up-converts, amplifies, filters, etc., it is input from the 1-port of the circulator, and the 2-port output is filtered by the filter module (ie, the filter shown in Figure 2) and transmitted through the antenna.
  • the filter module ie, the filter shown in Figure 2
  • the receiving module amplifies, filters, downconverts and the like of the uplink signal, and then sends the signal to the digital processing module.
  • the input of the switch module is 1 port, the output is 2, 3 ports, the 2 port is connected to the receiving module, and the 3 port is connected to the high power matching load (ie the high power load shown in Figure 2).
  • the signal path of the receiving module and the circulator, the filter, and the antenna is actually connected (corresponding to the uplink receiving channel of the base station described in the embodiment of FIG. 1), and the receiving is read at this time.
  • the noise floor or received signal strength of the path is the sum of the spatial signal and the noise of the entire receiver (including the antenna, filter, circulator and receiver module).
  • the noise floor or received signal strength of the read receiving channel actually only includes the receiving module and its subsequent link noise. .
  • the control module is used to control the power supply control of the receiving module and the transmitting module, and the channel selection of the switch module.
  • the uplink signal is received by the antenna, and is filtered by the filter module, and is input from the 2-port of the circulator, and is outputted by the 3-port, and is input through the port of the switch module, and is outputted by the port 2, and enters the receiving module for processing.
  • the control on the hardware is as follows: in the receiving time slot, 1) the transmitting module is powered off, the receiving module is powered on, and receives the signal; 2) the 1 and 2 ports of the switch module are turned on.
  • the transmitting module is powered on, sends a signal, and the receiving module is powered off; 2) the 1 and 3 ports of the switch module are turned on.
  • the signal processing process is as follows: when receiving the time slot, the electromagnetic wave of the antenna receiving space is filtered by the filter, and then input through the port of the circulator 2, and then output from the port of the circulator 3, at this time, the receiver path switch module The 1 and 2 ports are turned on, and the signal passes through the switch and then passes through the receiving module to reach the digital processing module for related processing.
  • the signal is output through the digital processing module through the transmitting module from the circulator 1 port input 2 port, filtered by the filter, and radiated through the antenna.
  • the 1 and 3 ports of the receiver path switch module are turned on, usually In this state, only the device that transmits the channel signal and does not backflow to the receiving channel to burn out the front end is considered.
  • the embodiment of the present disclosure adds a self-test mode based on the general RRU architecture. In this mode, it can be determined whether the interference is external or internal to the RRU by detecting the noise floor of the receiving channel or the received signal strength.
  • the digital processing module detects the received signal strength of the uplink receiving channel of the base station. If the received signal strength obtained by the real-time detection is greater than the alarm threshold, it is determined that an interference event occurs, and the base station self-test mode is activated. After the base station self-test mode is activated, the control module turns off the base station transmit channel. The digital module obtains the first received signal strength of the uplink receiving channel of the base station and the partial receiving channel by detecting that the base station transmitting channel is closed.
  • the interference originates from within the base station RRU or originates outside the base station.
  • first received signal strength and the second received signal strength may be respectively detected in the same time slot of the same frame, or may be separately detected in the same time slot of different frames.
  • the control on the receiving time slot hardware is as follows: in the receiving time slot, 1) the transmitting module is powered off, the receiving module is powered on, and receives the signal; 2) the 1 and 2 ports of the switch module are turned on, and the RSSI 12 is read. 3) The 1 and 3 ports of the switch module are turned on, and the RSSI 13 is read; 4) The RSSI 12 and RSSI 13 are compared to determine whether the interference is generated internally by the receiver.
  • the base station transmit channel is only turned off in the receive time slot. It can be seen that when the embodiment is applied to the TDD system, the self-test mode does not involve the transmission slot.
  • the main modules involved include: a control module, a detection module, and a judgment module, wherein the functions of the detection module and the judgment module can be implemented by a digital processing module.
  • the functions of each module in self-test mode include:
  • Control module 1. Control the receiving channel to power on; 2. Control the switch module to turn on ports 1 and 3; 3. Control the switch module to turn on ports 1 and 2.
  • Detection module reading the signal strength of the receiving channel (ie, RSSI), including: 1. reading the RSSI 13 when the switch module turns on the 1 and 3 ports (ie, the first received signal strength of the uplink receiving channel of the base station); 2. guiding the switch module The RSSI 12 (ie, the second received signal strength of the partial receive channel) is read through the 1 and 2 ports.
  • RSSI signal strength of the receiving channel
  • Judgment module Determine whether the interference is external or internal to the RRU by the values of RSSI13 and RSSI12. If the RSSI12 is greater than RSSI13 and the difference exceeds the predetermined range, the interference is external to the RRU, otherwise it is internal to the RRU.
  • FIG. 3 is a flowchart of a self-test mode provided by an embodiment of the present disclosure. As shown in FIG. 3, the steps include:
  • Step S201 The receiving channel has a high noise floor, and enters a certain bottom noise high receiving time slot self-test mode.
  • the receiving channel RSSI When the receiving channel RSSI is greater than the alarm threshold Ta, it indicates that the receiving channel has high noise floor and needs to enter the base station self-test mode. For example, if the receiving channel RSSI is -70 dBm and the alarm threshold Ta is -80 dBm, the receiving channel bottom noise is considered to be high.
  • Step S202 The control module controls the receiving channel to be powered on, and controls the switch module to turn on the ports 1 and 3.
  • Step S203 The detection module reads the received signal strength of the receiving channel, and records it as RSSI13.
  • Step S204 The control module controls the receiving channel to be powered on, and controls the switch module to turn on the ports 1 and 2.
  • Step S205 The detection module reads the received signal strength of the receiving channel, and records it as RSSI12.
  • Step S206 The determining module determines whether the difference between the RSSI 12 and the RSSI 13 is outside the preset range [0, Tb], that is, whether the difference between the RSSI 12 and the RSSI 13 is greater than the preset difference threshold Tb, and if yes, executing step S207, otherwise executing Step S208.
  • Step S207 The determining module determines that the interference is from outside the RRU.
  • Step S208 The determining module determines that the interference comes from inside the RRU.
  • RSSI 12 and RSSI 13 are read in the same time slot of different frames.
  • the base station finds that the RSSI is high in the background and suspects that there is interference, it can enter the self-test mode of the base station.
  • a time slot with high RSSI SLOT
  • the RSSI13 when the switch module 1 and 3 ports are turned on and the RSSI12 when the switch module 1 and 2 ports are turned on are compared with whether the RSSI12 is higher than the RSSI13 by the preset difference threshold Tb. If so, the reason why the RSSI is high can be judged. Outside the base station, otherwise the reason for the high RSSI is inside the base station channel.
  • the base station When the base station finds that the RSSI is high in the background and suspects that there is interference, it can enter the self-test mode of the base station, and configure a certain uplink time slot (SLOT) for the self-test mode through the background configuration fixed, and read separately in the same time slot of different frames. Take the RSSI13 when the switch module 1 and 3 ports are on and the RSSI12 when the switch module 1 and 2 ports are on. Compare whether the RSSI12 is higher than the RSSI13 by the preset difference threshold Tb. If yes, the reason why the RSSI is high may be determined. Outside the base station; otherwise the reason for the high RSSI is inside the base station channel.
  • SLOT uplink time slot
  • the interference can be scanned slot by slot to determine which time slots the interference occurs.
  • FIG. 5 is a second timing diagram of a self-test mode provided by an embodiment of the present disclosure. As shown in FIG. 5, RSSI 12 and RSSI 13 are read in the same time slot of the same frame.
  • the base station finds that the RSSI is high in the background and suspects that there is interference, it can enter the self-test mode of the base station.
  • a time slot with high RSSI SLOT
  • the RSSI13 when the switch module 1 and 3 ports are turned on and the RSSI12 when the switch module 1 and 2 ports are turned on are compared with whether the RSSI12 is higher than the RSSI13 by the preset difference threshold Tb. If so, the reason why the RSSI is high can be judged. Outside the base station, otherwise the reason for the high RSSI is inside the base station channel.
  • the base station When the base station finds that the RSSI is high in the background and suspects that there is interference, it can enter the self-test mode of the base station, configure a certain uplink time slot (SLOT) to configure the self-test mode through the background configuration, and respectively read the switch module in the same time slot of the same frame.
  • SLOT uplink time slot
  • the RSSI13 when the 1st and 3rd ports are on and the RSSI12 when the switch module 1 and 2 are turned on compares whether the RSSI12 is higher than the RSSI13 by the preset difference threshold Tb, and if so, the reason why the RSSI is high is outside the base station; Otherwise, the reason why the RSSI is high is inside the base station channel.
  • the interference can be scanned slot by slot to determine which time slots the interference occurs.
  • RSSI12 -40dBm
  • RSSI13 -85dBm (days)
  • the isolation between the line port and the switch module port 3 is 45dB). If it is an internal cause, RSSI12 and RSSI13 are equivalent.
  • the embodiment of the present disclosure can replace the method of adding a matching load to the antenna port when the current RSSI is high fault location, and can be remotely operated through the background, and does not require the worker to perform the station operation, thereby greatly saving manpower and material resources.
  • the base station interference detection method and apparatus increases the base station self-test mode based on the general RRU architecture.
  • the received signal strength of the receiving channel can be detected to determine whether the interference originates from outside or inside the base station, that is, It is determined whether the external interference or the RRU's own channel problem causes the RSSI to be high and the operability is high.

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Abstract

本公开涉及一种基站干扰检测方法及装置，涉及基站及通讯系统领域，所述方法包括：通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件；当判断已发生干扰事件时，启动基站自检模式；在启动基站自检模式后，在关闭基站发射通道的条件下，通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度；根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部。本公开实施例在一般RRU架构的基础上，增加基站自检模式，在此模式下，可以通过检测接收通道的接收信号强度来判断干扰是基站外部的还是内部的。 (图1)

Description

基站干扰检测方法及装置 技术领域
本公开涉及基站及通讯系统领域，特别涉及一种基站干扰检测方法及装置。
背景技术
随着各大运营商不断扩充基站站点，在外场频繁出现底噪高或接收信号强度指示(Received Signal Strength Indication，RSSI)高的现象，此时需要确定干扰是外部干扰还是内部干扰。
当定位是否为外部干扰时，需要在天线口使用匹配负载替换天线，然后通过底噪是否正常来判断是由外部干扰还是由射频拉远单元(Remote Radio Unit，RRU)自身通道问题引起的。
上述方案能够准确判断高RSSI现象是否是RRU的问题，但是在外场的可操作性低。
发明内容
根据本公开实施例提供的一种基站干扰检测方法及装置，能够确定导致高RSSI的原因是外部干扰还是内部干扰。
根据本公开实施例提供的一种基站干扰检测方法，包括：通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件；当判断已发生干扰事件时，启动基站自检模式；在启动基站自检模式后，在关闭基站发射通道的条件下，通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度；根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部。
优选地，所述的通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件包括：实时检测基站上行接收通道的接收信号，得到接收信号强度；若所述实时检测得到的基站上行接收通道的接收信号强度大于告警门限值，则判断已发生干扰事件。
优选地，所述的通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度包括：通过控制所述基站的环形器与接收模块之间的通道导通，检测包括天线、滤波器、环形器、接收模块的基站上行接收通道的第一接收信号强度；通过控制所述基站的环形器与接收模块之间的通道断开，检测包括接收模块的部分接收通道的第二接收信号强度。
优选地，所述的根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部包括：若所述第一接收信号强度和第二接收信号强度之差在预设范围内，则确定干扰源自基站内部，否则确定干扰源自基站外部。
优选地，在同一帧的相同时隙检测所述第一接收信号强度和第二接收信号强度，或在不同帧的相同时隙分别检测所述第一接收信号强度和第二接收信号强度。
优选地，在TDD系统中，仅在接收时隙关闭基站发射通道。
根据本公开实施例提供的存储介质，其存储用于实现上述基站干扰检测方法的程序。
根据本公开实施例提供的一种基站干扰检测装置，包括：数字处理模块，用于通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件，当判断已发生干扰事件时，启动基站自检模式；控制模块，用于在启动基站自检模式后，关闭基站发射通道；其中，在所述控制模块已关闭基站发射通道的条件下，所述数字模块通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度，并根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部。
优选地，所述数字处理模块实时检测基站上行接收通道的接收信号，得到接收信号强度，若所述实时检测得到的基站上行接收通道的接收信号强度大于告警门限值，则判断已发生干扰事件。
优选地，当所述控制模块控制所述基站的环形器与接收模块之间的通道导通时，所述数字处理模块检测包括天线、滤波器、环形器、接收模块的基站上行接收通道的第一接收信号强度，并当所述控制模块控制所述基站的环形器与接收模块之间的通道断开，所述数字处理模块检测包括接收模块的部分接收通道的第二接收信号强度。
优选地，所述数字处理模块在所述第一接收信号强度和第二接收信号强度之差在预设范围内时，确定干扰源自基站内部，否则确定干扰源自基站外部。
优选地，所述数字处理模块在同一帧的相同时隙检测所述第一接收信号强度和第二接收信号强度，或在不同帧的相同时隙分别检测所述第一接收信号强度和第二接收信号强度。
优选地，所述装置应用于TDD系统中时，仅在接收时隙关闭基站发射通道。
本公开实施例提供的技术方案具有如下有益效果：
本公开实施例在一般RRU架构的基础上，增加基站自检模式，在此模式下，可以通过检测接收通道的接收信号强度来确定干扰源自基站外部还是内部，即确定是外部干扰还是RRU自身通道问题引起RSSI偏高，可操作性高。
附图说明
图1是本公开实施例提供的基站干扰检测方法框图；
图2是本公开实施例提供的基站干扰检测装置示意图；
图3是本公开实施例提供的自检模式流程图；
图4是本公开实施例提供的自检模式第一时序图；
图5是本公开实施例提供的自检模式第二时序图。
具体实施方式
以下结合附图对本公开的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本公开，并不用于限定本公开。
图1是本公开实施例提供的基站干扰检测方法框图，如图1所示，步骤包括：
步骤S101：通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件。
步骤S101包括：实时检测基站上行接收通道的接收信号，得到接收信号强度，若该接收信号强度大于告警门限值，则判断已发生干扰事件。其中，所述接收信号包括空间信号和整个接收机噪声信号。
步骤S102：当判断已发生干扰事件时，启动基站自检模式。
步骤S103：在启动基站自检模式后，在关闭基站发射通道的条件下，通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度。
步骤S103包括：为检测接收通道的接收信号强度，基站自检时，需要关闭基站发射通道。然后，通过控制基站的环形器与接收模块之间的通道导通或断开，分别检测包括天线、滤波器、环形器、接收模块的基站上行接收通道的第一接收信号强度，以及包括接收模块的部分接收通道的第二接收信号强度。
也就是说，第一接收信号强度和第二接收信号强度需要在接收时隙检测，因此需要控制发射通道下电，接收通道上电。检测期间，通过控制环形器与接收模块之间的通路导通，对完整的基站上行接收通道的第一接收信号进行检测，得到第一接收信号强度，该第一接收信号包括空间信号和整个接收机噪声信号；通过控制环形器与接收模块之间的通路断开，实现对部分接收通道的第二接收信号进行检测，得到第二接收信号强度，由于环形器与接收模块之间的通路断开，该第二接收信号不包括空间信号以及环形器至天线之间的接收通道的噪声信号。
需要说明的是，可以在同一帧的相同时隙检测所述第一接收信号强度和第二接收信号强度，也可以在不同帧的相同时隙分别检测所述第一接收信号强度和第二接收信号强度。
需要说明的是，对于TDD系统，可以仅在接收时隙，关闭基站发射通道，检测上述第一接收信号强度和第二接收信号强度，而在发射时隙，可以正常开启基站发射通道，发信号。
步骤S104：根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部。
步骤S104包括：若所述第一接收信号强度和第二接收信号强度之差在预设范围内，则确定干扰源自基站内部，否则确定干扰源自基站外部。
本公开实施例适用于TDD系统基站RRU的干扰检测，通过远程配置RRU，可以达到判断干扰的目的。
本领域普通技术人员可以理解，实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，所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，包括步骤S101至步骤S104。其中，所述的存储介质可以为ROM/RAM、磁碟、光盘等。
图2是本公开实施例提供的基站干扰检测装置示意图，如图2所示，包括：数字处理模块、控制模块、发射模块、接收模块、开关(即图2所示的开关模块)、大功率负载、环形器、滤波器、天线。其中：数字处理模块将基带数据转换成模拟信号传递给发射模块，并将接收模块输出的信号进行模数转换并进行相应的数字处理后，传递给基带处理。
发射模块对信号进行上变频，放大，滤波等处理后，从环形器的1端口输入，2端口输出，经过滤波器模块(即图2所示的滤波器)的滤波，通过天线发射出去。
接收模块对上行信号进行放大，滤波，下变频等处理后，发送给数字处理模块。
开关模块输入端为1端口，输出端为2,3端口，2端口连接接收模块，3端口连接大功率匹配负载(即图2所示的大功率负载)。当开关模块的1和2端口导通时，实际连通了接收模块和环形器、滤波器及天线的信号通路(相当于图1实施例所述的基站上行接收通道)，此时读取的接收通路的底噪或接收信号强度是空间信号与整个接收机(包括天线，滤波器，环形器和接收模块)噪声的总和。当开关模块的1和3端口导通时，实际的接收模块和环形器是断开的，此时读取的接收通路的底噪或接收信号强度其实只包含接收模块及其以后的链路噪声。
控制模块用来控制接收模块和发射模块的供电控制，以及开关模块的通道选择。
其中，所述上行信号通过天线接收后，经过滤波器模块的滤波处理，从环形器的2端口输入，3端口输出，经过开关模块的1端口输入，2端口输出，进入接收模块进行处理。
在正常工作模式下，硬件上的控制如下：在接收时隙，1)发射模块下电，接收模块上电，接收信号；2)开关模块的1和2端口导通。在发射时隙，1)发射模块上电，发信号，接收模块下电；2)开关模块的1和3端口导通。
在正常工作模式下，信号处理过程如下：接收时隙时，天线接收空间的电磁波并通过滤波器滤波后，通过环形器2端口输入后，从环形器3端口输出，此时接收机通路开关模块的1和2端口导通，信号通过开关后经过接收模块到达数字处理模块进行相关处理。发射时隙时，信号通过数字处理模块经过发射模块从环形器1端口输入2端口输出，经滤波器滤波后，通过天线辐射出去，此时接收机通路开关模块的1和3端口导通，通常此种状态下只是考虑了发射通道信号不会反灌到接收通道烧坏前端的器件。
本公开实施例在一般RRU架构的基础上，增加了一种自检模式，在此模式下，可以通过检测接收通道底噪或接收信号强度来判断干扰是RRU外部的还是内部的。
在自检模式下，数字处理模块通过对基站上行接收通道的接收信号强度进行检测，若实时检测得到的接收信号强度大于告警门限值，则判断发生干扰事件，并启动基站自检模式。在启动基站自检模式后，控制模块关闭基站发射通道。在已关闭基站发射通道的条件下，所述数字模块通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的 第二接收信号强度，并根据所述第一接收信号强度和第二接收信号强度，示例性地通过判断所述第一接收信号强度和第二接收信号强度之差是否在预设范围内，确定干扰源自基站RRU内部或源自基站外部。
需要说明的是，所述第一接收信号强度和第二接收信号强度可以在同一帧的相同时隙分别检测，也可以在不同帧的相同时隙分别检测。
在自检模式下，接收时隙硬件上的控制如下：在接收时隙，1)发射模块下电，接收模块上电，接收信号；2)开关模块的1和2端口导通，读取RSSI12；3)开关模块的1和3端口导通，读取RSSI13；4)对比RSSI12和RSSI13，判断干扰是否是接收机内部产生。
所述装置应用于TDD系统中时，仅在接收时隙关闭基站发射通道。可见，本实施例应用于TDD系统中时，自检模式不涉及发射时隙。
在自检模式下，主要涉及的模块包括：控制模块、检测模块和判断模块，其中，检测模块和判断模块的功能可以由数字处理模块实现。在自检模式下各个模块的功能包括：
控制模块：1、控制接收通道上电；2、控制开关模块导通1和3端口；3、控制开关模块导通1和2端口。
检测模块：读取接收通道信号强度(即RSSI)，包括1、在开关模块导通1和3端口时读取RSSI13(即基站上行接收通道的第一接收信号强度)；2、在开关模块导通1和2端口时读取RSSI12(即部分接收通道的第二接收信号强度)。
判断模块：通过RSSI13和RSSI12的值来判断干扰是RRU外部的还是内部的，如果RSSI12大于RSSI13且差值超过预定范围，则干扰是RRU外部的，否则是RRU内部的。
图3是本公开实施例提供的自检模式流程图，如图3所示，步骤包括：
步骤S201：接收通道底噪高，进入某一底噪高接收时隙自检模式。
当接收通道RSSI大于告警门限值Ta时，说明接收通道底噪高，需要进入基站自检模式。例如，接收通道RSSI为-70dBm，告警门限值Ta为-80dBm，则认为接收通道底噪高。
步骤S202：控制模块控制接收通道上电，并控制开关模块导通1和3端口。
步骤S203：检测模块读取接收通道接收信号强度，记作RSSI13。
步骤S204：控制模块控制接收通道上电，并控制开关模块导通1和2端口。
步骤S205：检测模块读取接收通道接收信号强度，记作RSSI12
步骤S206：判断模块判断RSSI12与RSSI13的差值是否在预设范围[0,Tb]外，即判断RSSI12与RSSI13的差值是否大于预设差值门限Tb，若是，则执行步骤S207，否则执行步骤S208。
步骤S207：判断模块确定干扰来自RRU外部。
步骤S208：判断模块确定干扰来自RRU内部。
图4是本公开实施例提供的自检模式第一时序图，如图4所示，RSSI12和RSSI13在不同帧的相同时隙读取。
应用实施例一
当基站后台发现RSSI偏高，怀疑有干扰时，可以进入基站自检模式，在不改变基站基本配置的基础上，找到某一个RSSI高的时隙(SLOT)，在不同帧的相同时隙分别读取开关模块1和3端口导通时的RSSI13和开关模块1和2端口导通时的RSSI12，对比RSSI12是否比RSSI13高出预设差值门限Tb，如果是，可以判断RSSI偏高的原因在基站外部，否则说明RSSI偏高的原因在基站通道内部。
应用实施例二
当基站后台发现RSSI偏高，怀疑有干扰时，可以进入基站自检模式，通过后台配置固定，将某一上行时隙(SLOT)配置用于自检模式，在不同帧的相同时隙分别读取开关模块1和3端口导通时的RSSI13和开关模块1和2端口导通时的RSSI12，对比RSSI12是否比RSSI13高出预设差值门限Tb，如果是，可以判断RSSI偏高的原因在基站外部；否则说明RSSI偏高的原因在基站通道内部。
这种情况可以对干扰进行逐个时隙扫描，判断干扰出现在哪些时隙上。
图5是本公开实施例提供的自检模式第二时序图，如图5所示，RSSI12和RSSI13在同一帧的相同时隙读取。
应用实施例三
当基站后台发现RSSI偏高，怀疑有干扰时，可以进入基站自检模式，在不改变基站基本配置的基础上，找到某一个RSSI高的时隙(SLOT)，在同一帧的相同时隙分别读取开关模块1和3端口导通时的RSSI13和开关模块1和2端口导通时的RSSI12，对比RSSI12是否比RSSI13高出预设差值门限Tb，如果是，可以判断RSSI偏高的原因在基站外部，否则说明RSSI偏高的原因在基站通道内部。
应用实施例四
当基站后台发现RSSI偏高，怀疑有干扰时，可以进入基站自检模式，通过后台配置固定某一上行时隙(SLOT)配置成自检模式，在同一帧的相同时隙分别读取开关模块1和3端口导通时的RSSI13和开关模块1和2端口导通时的RSSI12，对比RSSI12是否比RSSI13高出预设差值门限Tb，如果是，可以判断RSSI偏高的原因在基站外部；否则说明RSSI偏高的原因在基站通道内部。
这种情况可以对干扰进行逐个时隙扫描，判断干扰出现在哪些时隙上。
对于LTE制式的RRU，以20MHz带宽为例，在无干扰时的RSSI为-98dBm水平，一般基站告警RSSI高的话，门限值在超过-80dBm。如果该-80dBm的RSSI抬高是由于RRU外部信号产生，那么自检模式时，RSSI12＝-80dBm，RSSI13＝-98dBm。如果RSSI12＝-80dBm，RSSI13也在-80dBm水平，那么偏高的原因在基站通道内部。对于更大的外部干扰信号，例如-40dBm，那么自检模式时，RSSI12＝-40dBm，RSSI13＝-85dBm(天 线口与开关模块端口3的隔离度45dB)。如果是内部原因，RSSI12和RSSI13相当。
综上所述，本公开的实施例具有以下技术效果：
本公开实施例可以取代目前RSSI偏高故障定位时在天线端口加匹配负载的方法，通过后台远程操作即可，不需要工人上站操作，大大节省了人力物力。
尽管上文对本公开进行了详细说明，但是本公开不限于此，本技术领域技术人员可以根据本公开的原理进行各种修改。因此，凡按照本公开原理所作的修改，都应当理解为落入本公开的保护范围。
工业实用性
本公开涉及的基站干扰检测方法及装置，在一般RRU架构的基础上，增加基站自检模式，在此模式下，可以通过检测接收通道的接收信号强度来确定干扰源自基站外部还是内部，即确定是外部干扰还是RRU自身通道问题引起RSSI偏高，可操作性高。

Claims (13)

  1. 一种基站干扰检测方法，包括：
    通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件；
    当判断已发生干扰事件时，启动基站自检模式；
    在启动基站自检模式后，在关闭基站发射通道的条件下，通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度；
    根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部。
  2. 根据权利要求1所述的方法，所述的通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件包括：
    实时检测基站上行接收通道的接收信号，得到接收信号强度；
    若所述实时检测得到的基站上行接收通道的接收信号强度大于告警门限值，则判断已发生干扰事件。
  3. 根据权利要求1所述的方法，所述的通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度包括：
    通过控制所述基站的环形器与接收模块之间的通道导通，检测包括天线、滤波器、环形器、接收模块的基站上行接收通道的第一接收信号强度；
    通过控制所述基站的环形器与接收模块之间的通道断开，检测包括接收模块的部分接收通道的第二接收信号强度。
  4. 根据权利要求1所述的方法，所述的根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部包括：
    若所述第一接收信号强度和第二接收信号强度之差在预设范围内，则确定干扰源自基站内部，否则确定干扰源自基站外部。
  5. 根据权利要求1-4任意一项所述的方法，在同一帧的相同时隙检测所述第一接收信号强度和第二接收信号强度，或在不同帧的相同时隙分别检测所述第一接收信号强度和第二接收信号强度。
  6. 根据权利要求5所述的方法，在TDD系统中，仅在接收时隙关闭基站发射通道。
  7. 一种基站干扰检测装置，包括：
    数字处理模块，设置为通过对基站上行接收通道的接收信号强度进行检测，判断是否发生干扰事件，当判断已发生干扰事件时，启动基站自检模式；
    控制模块，设置为在启动基站自检模式后，关闭基站发射通道；
    其中，在所述控制模块已关闭基站发射通道的条件下，所述数字模块通过检测得到基站上行接收通道的第一接收信号强度和部分接收通道的第二接收信号强度，并根据所述第一接收信号强度和第二接收信号强度，确定干扰源自基站内部或源自基站外部。
  8. 根据权利要求7所述的装置，所述数字处理模块实时检测基站上行接收通道的接 收信号，得到接收信号强度，若所述实时检测得到的基站上行接收通道的接收信号强度大于告警门限值，则判断已发生干扰事件。
  9. 根据权利要求7所述的装置，当所述控制模块控制所述基站的环形器与接收模块之间的通道导通时，所述数字处理模块检测包括天线、滤波器、环形器、接收模块的基站上行接收通道的第一接收信号强度，并当所述控制模块控制所述基站的环形器与接收模块之间的通道断开，所述数字处理模块检测包括接收模块的部分接收通道的第二接收信号强度。
  10. 根据权利要求7所述的装置，所述数字处理模块在所述第一接收信号强度和第二接收信号强度之差在预设范围内时，确定干扰源自基站内部，否则确定干扰源自基站外部。
  11. 根据权利要求7-10任意一项所述的装置，所述数字处理模块在同一帧的相同时隙检测所述第一接收信号强度和第二接收信号强度，或在不同帧的相同时隙分别检测所述第一接收信号强度和第二接收信号强度。
  12. 根据权利要求11所述的装置，所述装置应设置为TDD系统中时，仅在接收时隙关闭基站发射通道。
  13. 一种存储介质，设置为存储程序代码，所述程序代码用于执行权利要求1至5中任一项所述方法。
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