WO2006102793A1 - Procede de detection de signal de frequence illegalement utilisee dans un reseau de communication radio - Google Patents

Procede de detection de signal de frequence illegalement utilisee dans un reseau de communication radio Download PDF

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Publication number
WO2006102793A1
WO2006102793A1 PCT/CN2005/000407 CN2005000407W WO2006102793A1 WO 2006102793 A1 WO2006102793 A1 WO 2006102793A1 CN 2005000407 W CN2005000407 W CN 2005000407W WO 2006102793 A1 WO2006102793 A1 WO 2006102793A1
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Prior art keywords
signal
base station
communication network
detection
frequency
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PCT/CN2005/000407
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English (en)
French (fr)
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Yanwei Wu
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2005/000407 priority Critical patent/WO2006102793A1/zh
Priority to CN200580049673.5A priority patent/CN101167377B/zh
Publication of WO2006102793A1 publication Critical patent/WO2006102793A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/23—Indication means, e.g. displays, alarms, audible means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • the present invention relates to the field of wireless communications, and in particular to a method for detecting an illegally occupied frequency signal in a wireless communication network, and is particularly suitable for a time division multiple access cellular communication system (such as GSM, TD-SCDMA) and broadband wireless based on OFDM/OFDMA. Access to the network (such as 802.16). Background technique
  • wireless communication networks are established at specified frequency points or frequency bands. These specified frequency points or frequency bands are legal frequency points or frequency bands, and their right to use is limited by legal documents. Only authorized operators have the right to use the legal frequency or frequency band. Any unauthorized unit or individual using these frequency points or frequency bands is illegally occupied.
  • the wireless communication network is often interfered with by illegally occupying the frequency signal.
  • the interference of the illegally occupied frequency signal is serious, the local wireless communication network may not work normally.
  • operators of wireless communication networks find it difficult to locate and locate the illegal occupied frequency signals.
  • a large amount of human resources and monitoring equipment are usually required.
  • the communication device in the wireless communication network utilizes the average power information of the received signal reported by the base station, especially the average power information reported during the period of minimum traffic (such as 2 am to 4 am). Compared with the noise floor of the signal, it is judged whether there is interference of the illegal occupied frequency signal according to the comparison result of the two. In addition, based on the information reported by multiple base stations, the location of the interference source can be initially determined. Therefore, this technical solution is very useful for the operation of wireless communication networks and the maintenance of wireless communication networks.
  • the present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a method for detecting an illegally occupied frequency signal in a wireless communication network, which can be applied at any time without being affected by a legitimate communication service.
  • the method for detecting illegally occupying a frequency signal in a wireless communication network comprises the following steps:
  • the synchronous detection object is determined in the network affected by the same frequency network in the surrounding area;
  • the base station system compares the received signal strength with the signal floor noise. If the difference between the received signal strength and the signal floor noise is greater than a predetermined threshold, it indicates that there is an illegal occupied frequency signal in the network.
  • the step of determining a synchronization detection object comprises: periodically determining one or several consecutive synchronization detection objects.
  • the step of determining the synchronization detection object comprises: randomly determining one or several consecutive synchronization detection objects.
  • the synchronization detection object is a synchronization time slot.
  • the synchronous detection object is a synchronous time-frequency resource block.
  • the step of performing signal strength detection on the received signal is performed by the base station system or the terminal system; after the detection is completed, the terminal system reports the detection result of the received signal to the base station system.
  • the step of performing signal strength detection further includes: the base station system receiving the signal at the transmission frequency point.
  • the interference of the illegal occupied frequency signal in the current wireless communication network can be detected at any time without being affected by the legal communication.
  • Method of the invention It can be applied to a TDD- or FDD-based time division multiple access system to an OFDM/OFDMA-based broadband data communication network.
  • Figure 1 is a schematic diagram of communication time slots of a time division duplex (TDD) based time division multiple access system
  • Figure 2 is a wideband data communication based on Orthogonal Frequency Division Multiplexing (OFDM) / Orthogonal Frequency Division Multiple Access (OFDMA) Schematic diagram of the wireless resources of the network;
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDMA Orthogonal Frequency Division Multiple Access
  • FIG. 3 is a flow chart of detecting an illegal occupation frequency signal according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a typical time division multiple access wireless communication system
  • FIG. 5 is a flow chart of a method for detecting an illegal occupation frequency signal according to another embodiment of the present invention applied to the system of FIG. 4;
  • FIG. 6 is a flow chart of a method for detecting an illegal occupation frequency signal according to still another embodiment of the present invention applied to the system of FIG. 4;
  • FIG. 7 is a schematic diagram of a broadband data communication network based on OFDM/OFDMA;
  • FIG. 8 is a flow chart of a method for detecting an illegal occupied frequency signal according to still another embodiment of the present invention applied to the network shown in FIG. detailed description
  • FIG 1 is a schematic diagram of communication time slots of a time division multiple access (TDD) based time division multiple access system.
  • TDD time division multiple access
  • the so-called time division multiple access system refers to distinguishing voice and data information of different users through different time slots to avoid interference between different users.
  • the uplink and downlink links share the same frequency resource, and a sufficiently large protection time slot is left between the uplink and downlink time slots to avoid air transmission between the uplink and downlink time slots.
  • Crosstalk caused by delay as shown in Figure 1.
  • TDD-based time division multiple access wireless networks require strict network synchronization.
  • the uplink and downlink respectively occupy different frequency points, so that the uplink and downlink links can be avoided by relying on the frequency interval between the uplink and downlink links. Interference.
  • a broadband data communication network based on OFDM/OFDMA such as a broadband data communication system based on the 802.16 standard, divides radio resources by subcarriers in the frequency domain, in addition to dividing time slots in the time domain to distinguish users.
  • the radio resources allocated to each user appear as a region in the plane composed of the time domain and the frequency domain, as shown in Fig. 2, hereinafter referred to as a time-frequency resource block.
  • the time-frequency resource block contains all sub-carriers, the time-frequency resource block is equivalent to the time-slot, so the time slot is a special case of the time-frequency resource block.
  • FIG. 3 is a flow chart of a method of detecting an illegal occupation frequency signal in accordance with one embodiment of the present invention.
  • the detection method of the present invention can be applied to a time division multiple access wireless communication network based on TDD or FDD and a broadband data communication network based on OFDM/OFDMA.
  • the detection object in the network is determined according to the requirement of the interference signal detection. Specifically: determining the detection object in a local area network or the whole network affected by the same frequency network in other areas, synchronizing the time slot in the instant multiple access wireless communication network, or synchronizing the broadband data communication network based on OFDM or OFDMA Time-frequency resource block.
  • the synchronous time slot/synchronous time-frequency resource block means that the start/stop time/start and stop time of the specified time slot/time-frequency resource block and the sub-carrier are the same within the network detection range, and all transceivers in the network range are in the synchronization time. Synchronous detection of illegally occupied frequency signals in the slot/synchronous time-frequency resource block.
  • the synchronization time slot/synchronous time-frequency resource block size is determined according to the characteristics of the illegal occupied frequency signal and the requirement of detection accuracy. There are various methods for determining a synchronization slot/synchronous time-frequency resource block, including periodically determining one or several consecutive synchronization slot/synchronous time-frequency resource blocks, or randomly determining one or a certain period of time.
  • the periodically determined synchronization time slot/synchronous time-frequency resource block for signal detection can capture most illegal occupied frequency signals and is easy to implement; but for special illegal occupied frequency signals, for example, the interference period is just an integer of the detection period. Times, that During the period, the detection time slot/time-frequency resource block is randomly selected for detection; but the most important thing is that regardless of how the detection slot/time-frequency resource block is selected, it is necessary to ensure that the detection slot/time-frequency resource block has the characteristics of intra-network synchronization.
  • the synchronization slot/synchronous time-frequency resource block determined in step 301 is not allocated any link usage to ensure that there is no service transmission signal in the synchronization slot/synchronous time-frequency resource block, that is, the detected network. There is no base station or terminal transmitting signals.
  • the synchronized signal strength detection is performed on the received signal by the determined system, and the signal strength detection may use a power spectrum analysis method, specifically: the base station system performs fast Fourier transform (FFT) processing on the received signal, that is, In the frequency analysis of the broadband signal. Using FFT to process the signal, it is easy to find the presence of narrowband low power interference signals.
  • FFT fast Fourier transform
  • the base station system compares the strength of the received signal with the signal floor noise. If the difference between the received signal strength and the signal floor noise is greater than a predetermined threshold, it indicates that there is an illegal occupied frequency signal in the network (step 320); No interference was detected that illegally occupied the frequency signal. The test ends and the next test cycle is entered.
  • the predetermined threshold is determined based on the detection accuracy and the noise figure dynamic range of the detecting device itself, and in the present embodiment, the predetermined threshold is set to 3 dB.
  • the location of the illegally occupied frequency signal source may be initially determined on the network topology according to the detection result of the received signal by the base station.
  • the received signal is detected by the terminal system, and then the terminal system reports the detection result of the received signal to the base station system.
  • the signal strength detection method of the terminal system is specifically: the base station system notifies the terminal system of the location of the synchronization time slot/synchronous time-frequency resource block to be detected, and the terminal system performs strength on the received signal in the synchronization time slot/synchronous time-frequency resource block. Detection, if the difference between the received signal strength and the signal floor noise is greater than a predetermined threshold, it indicates that there is illegal occupied frequency signal interference in the network, otherwise it indicates that the illegal occupied frequency signal is not detected. Then, the detection result is transmitted to the base station system through the terminal system.
  • the base station system notifies the terminal system of the location of the synchronization time slot/synchronous time-frequency resource block to be detected, and may use any one of the following methods (but is not limited to this): by configuring a message, or in a synchronization time slot to be detected. /Synchronize The time-frequency resource block is tagged with a special flag, or the location of the fixed sync slot/time-frequency resource block.
  • the base station system when detecting whether there is interference of the illegally occupied frequency signal on the downlink, in step 310, the base station system performs transceiving and inversion, that is, The radio frequency point receives the signal, and then the signal strength is detected on the received signal.
  • the method according to the embodiment can detect the illegal occupied frequency signal in the wireless communication network, and the FFT processing received signal can easily find the existence of the narrowband low power interference signal.
  • a typical wireless communication network generally includes a base station system BSS and a core network CN.
  • the base station system BSS establishes a communication link with the user terminal in the air to complete the two-way transmission of voice and data information; the service data (voice or data) accesses the public network through the core network CN, such as the PSTN network or the Internet.
  • the core network CN is also responsible for completing functions such as authentication of legitimate users and mobile roaming control.
  • the base station system BSS includes a base transceiver station BTS and a base station controller BSCo. In a time division multiple access system, all BTSs require synchronization, for example, synchronization with a GPS system.
  • Each base station controller BSC has an operation and maintenance interface for connecting the operation and maintenance module OMM.
  • the operation and maintenance module OMM serves as a centralized point of a single base station system BSS, and can establish communication routes with multiple BTSs, and complete functions such as data configuration and device maintenance for the BSS system under the jurisdiction.
  • the regional operation and maintenance console For a network configured with multiple BSCs, configure the regional operation and maintenance console.
  • the LOMC governs multiple OAMs.
  • the regional operation and maintenance console LOMC serves as a centralized point of multiple base station systems BSS, and can establish communication routes with all BTSs under multiple BSS systems to complete data configuration and control of multiple BSS systems under the jurisdiction. Equipment maintenance and other functions.
  • the process shown in Figure 5 can be used to detect the illegal occupied frequency signal.
  • step 501 the operation and maintenance module OMM periodically configures one or more synchronization time slots, and the size of the synchronization time slot may be determined according to the characteristics of the illegal occupied frequency signal and the requirements of the detection accuracy.
  • step 505 the operation and maintenance module OMM transmits configuration information to the base station system BSS through its communication route with the base station system BSS.
  • step 510 the base station system BSS ensures during the scheduling of the resources that no information is transmitted in the configured time slots or times.
  • all BTSs in the network perform FFT processing on the received signals in the designated one or more of the time slots to determine the strength of the received signal.
  • the configuration information transmitted in step 505 further includes a predetermined threshold, such that in step 520, if the difference between the strength of the received signal and the signal floor noise is greater than a predetermined threshold, it indicates that there is illegal occupation. Frequency signal; otherwise, the frequency signal is not illegally occupied, the detection ends, and the next detection cycle is entered. If there is an illegal occupation frequency signal, then in step 525, the base station system BSS transmits the detection result to the operation and maintenance module OMM.
  • step 520 the base station system BSS transmits the determined received signal strength to the operation and maintenance module OMM, and then in step 525, the operation and maintenance module OMM determines the strength of the received signal and Whether the difference between the signal floor noises is greater than a predetermined threshold, and if so, indicates that there is an illegal occupation frequency signal. If there is an illegal occupation frequency signal, step 530 is performed. Finally, in step 530, the location of the illegally occupied frequency signal source is determined by the operation and maintenance module OMM according to the geographical distribution of the interfered base station.
  • the process shown in Figure 6 can be used to detect the illegal occupied frequency signal.
  • the regional operation and maintenance station LOMC periodically configures one or more synchronization time slots, and the synchronization time slot size is determined according to the characteristics of the interference signal and the detection accuracy.
  • the regional operations maintenance station LOMC transmits the configuration information to the respective operation and maintenance modules OMM through its communication route with all the operation and maintenance modules OMM under the jurisdiction.
  • the operation and maintenance module OMM transmits configuration information to the corresponding base station system BSS through its communication route with the base station system BSS.
  • the base station system BSS ensures during the resource scheduling process that no information is transmitted in the configured time slot or times.
  • step 620 all BTSs in the network analyze the received signals in the designated time slot or the time slots by using FFT processing to obtain a strong skin of the received signal. Then, to determine whether there is an illegal occupation frequency signal, It can be performed in the base station system BSS or in the regional operation and maintenance station LOMC. If executed in the base station system BSS, the configuration information transmitted in steps 605 and 610 further includes a predetermined threshold, such that in step 625, if the difference between the strength of the received signal and the signal floor noise is greater than a predetermined threshold, then the presence is indicated Illegal occupation of the frequency signal; otherwise, the frequency signal is not illegally occupied, the detection ends, and the next detection cycle is entered.
  • a predetermined threshold such that in step 625, if the difference between the strength of the received signal and the signal floor noise is greater than a predetermined threshold, then the presence is indicated Illegal occupation of the frequency signal; otherwise, the frequency signal is not illegally occupied, the detection ends, and the next detection cycle is entered.
  • step 630 the base station system BSS transmits the detection result to the corresponding operation and maintenance module OMM, and then transmits it to the regional operation and maintenance station LOMC. If executed in the regional operation and maintenance station LOMC, in step 625, the base station system BSS transmits the determined received signal strength to the corresponding operation and maintenance module OMM, and then to the regional operation and maintenance station LOMC, in step 630, It is judged by the regional operation and maintenance station LOMC whether the difference between the strength of the received signal and the signal noise of the signal is greater than a predetermined threshold, and if so, it indicates that there is an illegal occupation frequency signal. If there is an illegal occupation frequency signal, step 635 is performed. In step 635, the regional operations maintenance station LOMC may determine the location of the illegally occupied frequency signal source based on the geographical distribution of the interfered base station.
  • FIG. 7 shows a schematic diagram of an OFDM/OFDMA based broadband data communication network into a Next Generation Communication Network (NGN).
  • the OFDM/OFDMA-based broadband data communication network usually includes an OFDM/OFDMA base station subsystem BSS, an operation and maintenance server (OMM), and an access gateway (AGW), wherein the base station subsystem BSS is connected to the access gateway AGW.
  • the gateway AGW, NGN and the operation and maintenance server OMM are connected through the Internet.
  • the base station subsystem BSS establishes a communication link with the user terminal in the air to complete the two-way transmission of voice and data information.
  • the service data (voice or data) is connected through the access gateway AGW.
  • the base station subsystem BSS includes a base transceiver station BTS and a base station controller BSC.
  • Each base station controller BSC has an operation and maintenance interface, which can be directly connected to the operation and maintenance server OMM, or can be connected to the operation and maintenance server OMM through the Internet.
  • the OMM can establish communication routes with multiple BTSs to complete data configuration and device maintenance for the BSS subsystems under its jurisdiction.
  • the flow pair shown in FIG. 8 can be used. Illegal occupation of frequency signals for detection.
  • the operation and maintenance server OMM periodically configures one or more synchronous time-frequency resource blocks, and the synchronous time-frequency resource block size can be determined according to the characteristics of the illegal occupied frequency signal and the detection accuracy.
  • the operation maintainer OMM sends the configuration information to the access gateway AGW, and in step 805, the access gateway AGW performs address mapping on the configuration information and transmits the configuration information to the base station subsystem BSS.
  • the base station subsystem BSS ensures that no information is transmitted in the configured time or frequency resource blocks during the scheduling of the resources.
  • step 815 all BTSs in the network perform FFT processing on the received signals in the designated time or frequency resource block to determine the spectral strength of the received signal. Then, it is judged whether or not there is an illegal occupation frequency signal, which can be executed in the base station subsystem BSS or in the operation maintainer OMM. If executed in the base station subsystem BSS, the configuration information transmitted in steps 803 and 805 further includes a predetermined threshold, such that in step 820, if the difference between the strength of the received signal and the signal floor noise is greater than a predetermined threshold, then There is an illegal occupation frequency signal; otherwise, the frequency signal is not illegally occupied, the detection ends, ⁇ A next detection cycle.
  • step 825 the base station subsystem BSS transmits the detection result to the access gateway AGW, and then the access gateway AGW performs address mapping on the detection result and transmits it to the operation maintainer OMM. If executed in the operation maintainer OMM, in step 820, the base station subsystem BSS transmits the determined received signal strength to the access gateway AGW, and the access gateway AGW performs address mapping on the signal detection strength information, and then transmits the information to the access gateway AGW.
  • step 825 it is judged by the operation maintainer OMM whether the difference between the received signal strength and the signal floor noise is greater than a predetermined threshold, and if so, it indicates that there is an illegal occupation frequency signal. If there is an illegal occupation frequency signal, step 830 is performed. In step 830, the location of the illegally occupied frequency signal source is then determined by the operation and maintenance server OMM based on the geographical distribution of the interfered base station.
  • the method of the invention can be applied to a wireless communication network, in particular, a time division multiple access wireless communication network based on TDD/FDD and a broadband data communication network based on OFDM/OFDMA, for detecting whether there is an illegal occupation frequency signal in the uplink and downlink.
  • a wireless communication network in particular, a time division multiple access wireless communication network based on TDD/FDD and a broadband data communication network based on OFDM/OFDMA, for detecting whether there is an illegal occupation frequency signal in the uplink and downlink.

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Description

检测无线通讯网络中非法占用频率信号的方法 技术领域
本发明涉及无线通讯领域， 具体地说， 涉及在无线通讯网络中检测非 法占用频率信号的方法， 尤其适用于时分多址蜂窝通讯系统（诸如 GSM, TD-SCDMA )和基于 OFDM/OFDMA的宽带无线接入网络（诸如 802.16 )。 背景技术
按照相关标准的规定， 无线通讯网络都是建立在规定的频点或频段上 的， 这些规定的频点或频段就是合法频点或频段， 其使用权通过法律文件 限定。 只有被授权的运营商拥有对合法频点或频段的使用权， 任何未经授 权的单位或个人使用这些频点或频段均属于非法占用。
但是在建设无线通讯网络以及网络运行过程中， 无线通讯网络常常受 到非法占用频率信号的干扰， 当非法占用频率信号的干扰严重时， 会导致 局部无线通讯网络不能正常工作。 通常无线通讯网络的运营商艮难发现和 定位非法占用频率信号的存在， 为了证明存在非法占用频率信号， 并找到 干扰源， 通常需要大量的人力和监测设备。
在现有技术中 , 无线通讯网络中的通讯设备利用基站 信机上报的 接收信号平均功率信息， 尤其是在业务量最小的时段（比如凌晨 2点到 4 点）上报的平均功率信息， 将其与信号底噪进行比较， 根据两者的比较结 果判断是否存在非法占用频率信号的干扰。 另外， 才艮据多个基站上报的信 息可以初步判断干扰源的位置。 因此， 这种技术方案对于无线通讯网络的 运营和无线通讯网络的维护， 都是非常有用的。 但是， 采用这种技术方案 在现有的无线通讯网络中检测非法占用频率信号的干扰时， 网络中同时还 可能存在合法的通信业务， 这样检测容易受到影响， 为了减小这种影响， 必须选择在业务量艮小的时间段的统计数据才有意义。 因此， 如果非法占 用频率信号的干 生在白天业务繁忙的时间段， 就 ^检测出非法占用 频率信号。 发明内容
本发明正是鉴于现有技术的上述问题提出的， 其目的在于提供一种检 测无线通讯网络中非法占用频率信号的方法， 可以在任意时间应用， 不受 合法通信业务的影响。
本发明所述检测无线通讯网络中非法占用频率信号的方法， 包括以下 步驟：
根据对非法占用频率信号检测的要求， 在受周围区域同频网络影响小 的网络中确定同步检测对象；
保持所述同步检测对象不分配给任何链路使用；
在所述同步检测对象中， 对接收信号进行信号强度检测；
基站系统将接收信号强度与信号底噪进行比较， 如果接收信号强度与 信号底噪之间的差大于预定阈值， 则表明网络中存在非法占用频率信号。
优选地， 所述确定同步检测对象的步骤包括： 周期性地确定一个或几 个连续的同步检测对象。
优选地， 所述确定同步检测对象的步骤包括： 随机性地确定一个或几 个连续的同步检测对象。
优选地， 当所述无线通讯网络是时分多址系统时， 所述同步检测对象 是同步时隙。
优选地， 当所述无线通讯网络是基于正交频分复用 /正交频分复用接入 的宽带数据通讯网络时， 所述同步检测对象是同步时频资源块。
优选地， 所述对接收信号进行信号强度检测的步骤由基站系统或终端 系统执行； 所述终端系统在检测完成后， 将接收信号的检测结果上报给基 站系统。
优选地， 当所述无线通讯网络 于频分双工的时分多址系统或基于 正交频分复用 /正交频分复用接入的宽带数据通讯网络时， 对于下行链路， 所述进行信号强度检测的步骤还包括： 基站系统在发射频点接收信号。
采用本发明的方法， 可以在任何时刻对当前无线通讯网络中是否存在 非法占用频率信号的干扰进行检测， 不受合法通信的影响。 本发明的方法 可以应用于基于 TDD或 FDD的时分多址系统以 ^基于 OFDM/OFDMA 的宽带数据通讯网络。 附图说明
图 1是基于时分双工 （TDD ) 的时分多址系统的通讯时隙示意图； 图 2是基于正交频分复用 （OFDM ) /正交频分复用接入 ( OFDMA ) 的宽带数据通讯网络的无线资源示意图；
图 3是根据本发明的一个实施例的检测非法占用频率信号的流程图； 图 4是典型的时分多址无线通讯系统的示意图；
图 5是应用于图 4所示系统的根据本发明的另一个实施例的检测非法 占用频率信号的方法流程图；
图 6是应用于图 4所示系统的根据本发明的再一个实施例的检测非法 占用频率信号的方法流程图；
图 7是基于 OFDM/OFDMA的宽带数据通讯网络的示意图； 图 8是应用于图 7所示网络的根据本发明的再一个实施例的检测非法 占用频率信号的方法流程图。 具体实施方式
相信通过以下结合附图对具体实施例的详细描述， 可以更好地理解本 发明的上述目的、 特征和优点。
图 1是基于时分双工（TDD ) 的时分多址系统的通讯时隙示意图。 所 谓时分多址系统， 是指通过不同时隙区分不同用户的语音、 数据信息， 以 避免不同用户之间产生千扰。 对于采用 TDD通讯模式的时分多址系统， 其上下行链路共享同一频率资源， 在上下行时隙之间留有足够大的保护时 隙， 以避免在上下行时隙之间有由于空中传输延时导致的串扰， 如图 1所 示。 基于 TDD的时分多址无线网^求严格的网络同步。
对于采用 FDD通讯模式的时分多址系统，其上下行链路分别占用不同 的频点， 这样依靠上下行链路之间的频率间隔， 就可以避免上下行链路之 间的干扰。
基于 OFDM/OFDMA的宽带数据通讯网络， 如基于 802.16标准的宽 带数据通讯系统， 除了在时域上划分时隙以区分用户外， 还在频域上通过 子载波的方式对无线资源进行划分。 这样， 分配给每个用户的无线资源在 时域和频域构成的平面中， 表现为一个区域， 如图 2所示， 下文称为时频 资源块。 当时频资源块包含所有子载波时， 时频资源块就等同于时隙， 因 此时隙是时频资源块的一个特例。
图 3是根据本发明的一个实施例的检测非法占用频率信号的方法流程 图。 本发明的检测方法可以应用于基于 TDD或 FDD的时分多址无线通讯 网络和基于 OFDM/OFDMA的宽带数据通讯网络。
在步骤 301 , 根据干扰信号检测的要求， 确定网络中的检测对象。 具 体是： 在受其它区域同频网络影响小的局部区域网络或全网范围内确定检 测对象， 即时分多址无线通讯网络中的同步时隙， 或者基于 OFDM 或 OFDMA的宽带数据通讯网络的同步时频资源块。所谓同步时隙 /同步时频 资源块是指该指定时隙 /时频资源块的起止时间 /起止时间和子载波在网络 检测范围内是相同的， 网络范围内的所有收发信机在该同步时隙 /同步时频 资源块内对非法占用频率信号进行同步检测。
同步时隙 /同步时频资源块大小根据非法占用频率信号的特点和检测 精度的要求确定。 确定同步时隙 /同步时频资源块有多种方法， 包括周期性 地确定某一个或几个连续的同步时隙 /同步时频资源块，或者在某一时间段 里随机性地确定一个或连续几个的同步时隙 /同步时频资源块，无论是哪种 方法只要保证对非法占用频率信号的检测无论在频域还是在时域都有很好 的覆盖即可， 换句话说， 采用周期性确定的同步时隙 /同步时频资源块进行 信号检测可以捕捉到绝大多数非法占用频率信号， 并且易于实现； 但对于 特殊的非法占用频率信号， 例如其干扰周期恰好是检测周期的整数倍， 那 期内随机选择检测时隙 /时频资源块进行检测； 但最重要的是无论检测时隙 /时频资源块如何选取， 必须保证检测时隙 /时频资源块具有网内同步的特 性。
在步骤 305， 保持步骤 301中确定的同步时隙 /同步时频资源块不分配 何链路使用， 以确保在该同步时隙 /同步时频资源块中没有任何业务发 射信号， 即检测的网络中没有基站或终端发射信号。 在步骤 310， 在被确 系统对接收信号进行同步信号强度检测， 信号强度检测可以釆用功率谱分 析的方法， 具体是： 基站系统对接收信号进行快速傅里叶变换（FFT )处 理， 即相当于对宽频信号进行频讲分析。 采用 FFT处理信号， 能够很容易 发现窄带小功率干扰信号的存在。
在步驟 315中， 基站系统将接收信号的强度与信号底噪进行比较， 如 果接收信号强度与信号底噪之间的差大于预定阈值， 则表明网络中存在非 法占用频率信号（步骤 320 )； 否则没有检测到非法占用频率信号的干扰。 检测结束， 进入下一个检测周期。 预定阈值是根据检测精度和检测设备本 身的噪声系数动态范围确定， 在本实施例中， 预定阈值设置为 3dB。
进一步地， 在检测到网络中有非法占用频率信号的干扰后， 可以进一 步地根据基站对接收信号的检测结果， 在网络拓朴图上初步确定非法占用 频率信号源的位置。
优选地， 在步骤 310， 还可以由终端系统对接收信号进行信号强度检 测， 然后终端系统将接收信号的检测结果上报给基站系统。 终端系统的信 号强度检测方法具体是： 基站系统将待检测的同步时隙 /同步时频资源块的 位置通知终端系统， 终端系统在该同步时隙 /同步时频资源块内对接收信号 进行强度检测， 如果接收信号强度与信号底噪之间的差大于预定阈值， 则 说明网络中存在非法占用频率信号干扰， 否则说明没有检测到非法占用频 率信号。 然后， 检测结果通过终端系统发送给基站系统。 基站系统将待检 测的同步时隙 /同步时频资源块的位置通知终端系统，可以釆用以下方式的 任何一种（但也不限于此）： 通过配置消息， 或在待检测的同步时隙 /同步 时频资源块上加有特殊标记， 或固定同步时隙 /时频资源块的位置。
对于基于 FDD的时分多址无线通讯网络和基于 OFDM或 OFDMA的 宽带数据通讯网络，在检测下行链路上是否有非法占用频率信号的干扰时， 在步骤 310中， 基站系统进行收发倒置， 即在发射频点接收信号， 然后对 接收信号进行信号强度检测。
通过以上的描述可知， 采用本实施例所述的方法可以对无线通讯网络 中的非法占用频率信号进行检测， 此外采用 FFT处理接收信号， 可以很容 易发现窄带小功率干扰信号的存在。
下面以基于 TDD 的时分多址无线通讯网络为例， 具体说明本发明方 法的实施。
如图 4所示， 典型的无线通讯网络通常包括基站系统 BSS和核心网 CN两个部分。基站系统 BSS与用户终端在空中建立通讯链路， 完成语音、 数据信息的双向传送； 业务数据 (语音或数据 )通过核心网 CN接入公网， 如 PSTN网络或互联网。 核心网 CN还负责完成对合法用户的鉴权和移动 漫游控制等功能。 基站系统 BSS 包括基站收发信机 BTS 和基站控制器 BSCo 在时分多址系统中， 所有 BTS要求同步， 例如与 GPS系统同步。 每个基站控制器 BSC都有操作维护接口， 用于连接操作维护模块 OMM。 在网络拓朴图中， 操作维护模块 OMM作为单个基站系统 BSS的集中点， 可以与多个 BTS建立通信路由， 完成对所管辖 BSS系统的数据配置和设 备维护等功能。对于配置有多个 BSC的网络， 则配置地区操作维护控制台 LOMC管辖多个操作维护模块 OMM。 在网络拓朴图中， 地区操作维护控 制台 LOMC作为多个基站系统 BSS的集中点， 可以与多个 BSS系统下的 所有 BTS建立通信路由， 完成对所管辖的多个 BSS系统的数据配置和设 备维护等功能。
如果是单个基站系统 BSS覆盖的区域网络， 则可以釆用图 5所示的流 程， 对非法占用频率信号进行检测。
在步骤 501， 操作维护模块 OMM周期地配置一个或多个同步时隙， 同步时隙的大小可根据非法占用频率信号的特点和检测精度的要求确定。 在步骤 505，操作维护模块 OMM通过其与基站系统 BSS之间的通讯路由， 将配置信息传送给基站系统 BSS。 然后在步骤 510， 基站系统 BSS在资源 的调度过程中确保在配置的这个或者这些时隙中不传送任何信息。 在步骤 515， 网络中所有的 BTS 对指定的这个或者这些时隙中的接收信号采用 FFT处理， 确定接收信号的强度。 然后， 判断网络中是否存在非法占用频 率信号， 其可以在基站系统 BSS中执行， 也可以在操作维护模块 OMM中 执行。 如果在基站系统 BSS中执行， 则在步骤 505中传送的配置信息还包 括预定阈值， 这样在步骤 520中， 如果接收信号的强度与信号底噪之间的 差大于预定阈值， 则表明存在非法占用频率信号； 否则没有非法占用频率 信号， 检测结束， 进入下一个检测周期。 如果有非法占用频率信号， 则在 步骤 525中， 基站系统 BSS将检测结果传送到操作维护模块 OMM。 如果 在操作维护模块 OMM中执行，则在步骤 520，中，基站系统 BSS将确定的 接收信号强度传送到操作维护模块 OMM, 然后在步骤 525，中， 由操作维 护模块 OMM 判断接收信号的强度与信号底噪之间的差是否大于预定阈 值， 如果是， 则表明存在非法占用频率信号。 如果存在非法占用频率信号， 则执行步骤 530。 最后， 在步骤 530， 由操作维护模块 OMM根据被干扰 的基站的地理位置分布情况确定非法占用频率信号源的位置。
如果是多个基站系统 BSS覆盖的区域网络， 则可以采用如图 6所示的 流程， 对非法占用频率信号进行检测。
在步骤 601，地区操作维护台 LOMC周期 配置一个或多个同步时隙， 同步时隙大小根据干扰信号的特点和检测精度的要求决定。 在步骤 605， 地区操作维护台 LOMC将该配置信息通过其与所管辖的所有操作维护模 块 OMM之间的通讯路由， 传送到各个操作维护模块 OMM。 在步骤 610， 操作维护模块 OMM通过其与基站系统 BSS之间的通讯路由 ,将配置信息 传送给相应的基站系统 BSS。 在步骤 615， 基站系统 BSS在资源调度过程 中确保在配置的这个或者这些时隙中不传送任何信息。 然后在步骤 620， 网络中所有 BTS对指定的这个或者这些时隙中的接收信号采用 FFT处理 进行分析， 得到接收信号的强皮。 然后， 判断是否存在非法占用频率信号， 其可以在基站系统 BSS中执行，也可以在地区操作维护台 LOMC中执行。 如果在基站系统 BSS中执行， 则在步骤 605和 610中传送的配置信息还包 括预定阈值， 这样在步骤 625中， 如果接收信号的强度与信号底噪之间的 差大于预定阈值， 则表明存在非法占用频率信号； 否则没有非法占用频率 信号， 检测结束， 进入下一个检测周期。 如果网络中有非法占用频率信号， 则在步驟 630 中， 基站系统 BSS将检测结果传送到对应的操作维护模块 OMM , 然后传送到地区操作维护台 LOMC。 如果在地区操作维护台 LOMC中执行， 则在步骤 625，中， 基站系统 BSS将确定的接收信号强度 传送到对应的操作维护模块 OMM, 然后传送到地区操作维护台 LOMC, 在步骤 630，中， 由地区操作维护台 LOMC判断接收信号的强度与信号底 噪之间的差是否大于预定阈值， 如果是， 则表明存在非法占用频率信号。 如果存在非法占用频率信号， 则执行步骤 635。 在步骤 635中， 地区操作 维护台 LOMC 可以根据被干扰的基站的地理位置分布情况确定非法占用 频率信号源的位置。
图 7示出了基于 OFDM/OFDMA的宽带数据通讯网^ 入下一代通 讯网络（NGN ) 的示意图。 基于 OFDM/OFDMA的宽带数据通讯网络通 常包括 OFDM/OFDMA基站子系统 BSS、 操作维护服务器（OMM )和接 入网关（AGW )等几个部分， 其中基站子系统 BSS与接入网关 AGW相 连， 接入网关 AGW、 NGN和操作维护服务器 OMM通过互联网相连， 基 站子系统 BSS与用户终端在空中建立通讯链路， 完成语音、 数据信息的双 向传送； 业务数据（语音或数据）通过接入网关 AGW接入互联网， 而下 一代通讯网络 NGN 负责完成对合法用户的鉴权和移动漫游控制等功能。 基站子系统 BSS包括基站收发信机 BTS和基站控制器 BSC, 每个基站控 制器 BSC都有操作维护接口， 可以直接连接操作维护服务器 OMM, 也可 以通过互联网连接操作维护服务器 OMM。 在网络拓朴图中， 操作维护服 务器 OMM可以与多个 BTS建立通信路由， 完成对所管辖 BSS子系统的 数据配置和设备维护等功能。
对于基站子系统 BSS覆盖的区域网络， 则可以采用图 8所示的流程对 非法占用频率信号进行检测。 在步骤 801， 操作维护服务器 OMM周期地 配置一个或多个同步时频资源块， 同步时频资源块大小可才艮据非法占用频 率信号的特点和检测精度的要求确定。 在步骤 803， 操作维护器 OMM将 配置信息发送到接入网关 AGW, 并在步骤 805中， 接入网关 AGW将配 置信息进行地址映射后， 传送给基站子系统 BSS。 然后在步骤 810, 基站 子系统 BSS在资源的调度过程中确保在配置的这个或者这些时频资源块中 不传送任何信息。 在步骤 815中， 网络中所有的 BTS对指定的这个或者这 些时频资源块中的接收信号采用 FFT处理， 确定接收信号的频谱强度。 然 后， 判断是否存在非法占用频率信号， 其可以在基站子系统 BSS中执行， 也可以在操作维护器 OMM中执行。如果在基站子系统 BSS中执行， 则在 步骤 803和 805中传送的配置信息还包括预定阈值， 这样在步骤 820中， 如果接收信号的强度与信号底噪之间的差大于预定阈值， 则表明存在非法 占用频率信号； 否则没有非法占用频率信号， 检测结束， ^A下一个检测 周期。 如果有非法占用频率信号， 则在步骤 825中， 基站子系统 BSS将检 测结果传送到接入网关 AGW, 然后接入网关 AGW对检测结果进行地址 映射后， 传送到操作维护器 OMM。 如果在操作维护器 OMM中执行， 则 在步骤 820，中， 基站子系统 BSS 将确定的接收信号强度传送到接入网关 AGW,接入网关 AGW对信号检测强度的信息进行地址映射后，传送到操 作维护服务器 OMM， 然后在步骤 825，中， 由操作维护器 OMM判断接收 信号的强度与信号底噪之间的差是否大于预定阔值， 如果是， 则表明存在 非法占用频率信号。 如果存在非法占用频率信号， 则执行步骤 830。 在步 骤 830中， 然后由操作维护服务器 OMM根据被干扰的基站的地理位置分 布情况确定非法占用频率信号源的位置。 工业应用性
本发明方法可以应用于无线通讯网络中， 尤其是基于 TDD/FDD的时 分多址无线通讯网络和基于 OFDM/OFDMA 的宽带数据通讯网络， 用于 检测上下行链路中是否存在非法占用频率信号。

Claims

权利要求书
1.一种检测无线通讯网络中非法占用频率信号的方法， 其特征在于， 包括以下步骤：
根据对非法占用频率信号检测的要求， 在受周围区域同频网络影响小 的网络中确定同步检测对象；
保持所述同步检测对象不分配给任何链路使用；
在所述同步检测对象中， 对接收信号进行信号强度检测；
基站系统将接收信号强度与信号底噪进行比较， 如果接收信号强度与 信号底噪之间的差大于预定阔值， 则表明网络中存在非法占用频率信号。
2.根据权利要求 1所述的方法， 其特征在于， 所述确定同步检测对象 的步骤包括： 周期性地确定一个或几个连续的同步检测对象。
3.根据权利要求 1所述的方法， 其特征在于， 所述确定同步检测对象 的步骤包括： 随机性地确定一个或几个连续的同步检测对象。
4.根据权利要求 1所述的方法， 其特征在于， 当所述无线通讯网络是 时分多址系统时， 所述同步检测对象是同步时隙。
5.根据权利要求 1所述的方法， 其特征在于， 当所述无线通讯网络是 基于正交频分复用 /正交频分复用接入的宽带数据通讯网络时， 所述同步检 测对象是同步时频资源块。
6.根据权利要求 4或 5所述的方法， 其特征在于， 所述对接收信号进 行信号强度检测的步骤由基站系统或终端系统执行； 所述终端系统在检测 完成后， 将接收信号的检测结果上报给基站系统。
7.根据权利要求 6所述的方法， 其特征在于， 所述进行信号强度检测 的步骤采用功率谱分析方法对接收信号进行强度检测， 得到接收信号的频 率强度。
8.根据权利要求 7所述的方法， 其特征在于， 所述功率傳分析方法是 快速傅里叶变换方法
9.根据权利要求 8所述的方法， 其特征在于， 当所述无线通讯网络是 宽带数据通讯网络时， 对于下行链路， 所述进行信号强度检测的步骤还包 括： 基站系统在发射频点接收信号。
10. 根据权利要求 8所述的方法， 其特征在于， 所述方法还包括： 根 据基站系统的检测结果， 在基站分布拓朴图上确定非法占用频率信号源的 位置。
PCT/CN2005/000407 2005-03-29 2005-03-29 Procede de detection de signal de frequence illegalement utilisee dans un reseau de communication radio Ceased WO2006102793A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101959228A (zh) * 2009-07-13 2011-01-26 中兴通讯股份有限公司 一种ofdma系统干扰分析方法和装置
US9456329B2 (en) 2010-09-20 2016-09-27 Lg Electronics Inc. Method and apparatus for disabling an illegal device in a wireless LAN system
CN107798317A (zh) * 2017-11-30 2018-03-13 安徽汇鑫电子有限公司 非法干扰信号实时监测报警设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3026835A1 (en) * 2014-11-28 2016-06-01 Gemalto M2M GmbH Method of detecting a jamming transmitter affecting a communication user equipment
KR101641112B1 (ko) * 2016-06-13 2016-07-20 (주)지슨 광대역 불법 무선 신호의 탐지 방법
CN108075846B (zh) * 2016-11-17 2021-06-18 中兴通讯股份有限公司 一种基站干扰检测方法及装置
CN116506045A (zh) * 2023-02-13 2023-07-28 中国科学院信息工程研究所 电磁干扰检测系统、方法、电子设备及存储介质

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1386033A (zh) * 2001-05-11 2002-12-18 三星电子株式会社 消除移动终端的本地无线通信设备中的干扰的装置和方法
EP1499033A1 (en) * 2003-07-16 2005-01-19 Sony International (Europe) GmbH Detection of broadcast signals for defining useable frequency bands for powerline communication

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6639541B1 (en) * 2000-08-29 2003-10-28 The United States Of America As Represented By The Secretary Of The Navy Device and method for detecting, measuring, and reporting low-level interference at a receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1386033A (zh) * 2001-05-11 2002-12-18 三星电子株式会社 消除移动终端的本地无线通信设备中的干扰的装置和方法
EP1499033A1 (en) * 2003-07-16 2005-01-19 Sony International (Europe) GmbH Detection of broadcast signals for defining useable frequency bands for powerline communication

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101959228A (zh) * 2009-07-13 2011-01-26 中兴通讯股份有限公司 一种ofdma系统干扰分析方法和装置
CN101959228B (zh) * 2009-07-13 2014-03-19 中兴通讯股份有限公司 一种ofdma系统干扰分析方法和装置
US9456329B2 (en) 2010-09-20 2016-09-27 Lg Electronics Inc. Method and apparatus for disabling an illegal device in a wireless LAN system
CN107798317A (zh) * 2017-11-30 2018-03-13 安徽汇鑫电子有限公司 非法干扰信号实时监测报警设备
CN107798317B (zh) * 2017-11-30 2024-06-04 安徽汇鑫电子有限公司 非法干扰信号实时监测报警设备

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