KR20180101917A - Radio wave interference monitoring method and radio wave interference monitoring apparatus performing the method - Google Patents

Abstract

The present invention relates to a radio wave interference monitoring method and a radio wave interference monitoring apparatus performing the same. The radio wave interference monitoring method can automatically classify a radio wave interference source by analyzing spectrum and packet information of a communication signal received in a mobile communication band and monitoring and detecting whether radio wave interference for the communication signal occurs or not.

Description

TECHNICAL FIELD [0001] The present invention relates to a radio frequency interference monitoring method and a radio frequency interference monitoring method for performing the method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio frequency interference monitoring method and a radio frequency interference monitoring apparatus for performing the method, and more particularly to a method and apparatus for monitoring and detecting whether a radio frequency interference has occurred with respect to a communication signal received in a mobile communication band .

The mobile communication radio wave may mean that the radio wave signal of the mobile communication frequency band can not operate due to disturbance of other signals. The mobile communication radio wave includes communication radio wave disturbance which causes interference to a corresponding service or device by transmitting a frequency signal of artificially high intensity in a mobile communication frequency band to induce interference with the radio wave signal.

Communication propagation disturbance is the transmission of radio waves in the form of a deception, which detects false propagation and frequency and confuses or interferes with the communication system to transmit false information in the signal. In order to promptly respond to communication propagation disturbance, it is very important to monitor communication disturbance and detect a disturbance source. However, in the conventional radio wave monitoring system for a mobile communication band, And the channel power measurement is performed only within a limited range.

Therefore, there is a need for a method for real-time detection and classification of radio wave interference including communication radio disturbance.

The present invention relates to a method and apparatus for instantly and instantaneously and instantaneously detecting and classifying a radio wave interference including a radio wave disturbance of a communication signal by monitoring a communication signal received in a mobile communication band in real time.

The present invention relates to a method and apparatus for analyzing packet information and spectrum of a communication signal received in a mobile communication band to monitor whether or not a radio wave interference of a communication signal has occurred and to classify a horn interference source according to radio wave interference .

The present invention relates to a method and apparatus for detecting a frequency and a bandwidth of a jamming (interference) signal according to radio wave disturbance when a horn interferer of a communication signal in which a radio wave interference occurs is radio wave disturbance.

According to an embodiment of the present invention, there is provided a method for monitoring radio wave interference, comprising the steps of: processing a plurality of communication signals received in a mobile communication band; Performing analog-digital conversion (ADC) on the pre-processed communication signal; Analyzing a packet of the analog-to-digital converted communication signal to determine whether the communication signal is interrupted by the packet; Analyzing a spectrum of the analog-to-digital converted communication signal to determine whether the communication signal is crosstalk based on the spectrum; And determining whether a radio wave interference has occurred with respect to the communication signal in consideration of whether or not the communication signal is interference based on the determined packet and whether the communication signal is interference based on the spectrum.

The step of performing the pre-processing according to an embodiment includes a step of applying a plurality of communication signals received in a mobile communication band to a filter bank according to a unit of time to select one communication signal based on the bandwidth of the filter bank ; And amplifying the selected communication signal through a Low-Noise Amplifier (LNA).

The step of determining whether a communication signal is interrupted by a packet according to an embodiment includes: decoding the analog-to-digital converted communication signal; And determining whether a communication signal is interfered with using the packet information related to the physical layer (PHY Layer) of the network constituting the decoded communication signal and the packet information related to the MAC layer of the network have.

The step of determining whether a communication signal is interference based on a spectrum according to an exemplary embodiment of the present invention includes performing Fast Fourier Transform (FFT) on the analog-to-digital converted communication signal; And analyzing at least one of a signal source, an intensity, and a generation pattern based on the spectrum of the FFT-processed communication signal to determine interference of the communication signal.

The step of determining interference of a communication signal according to an exemplary embodiment of the present invention includes detecting a signal source having a constant intensity in the same communication signal based on the spectrum of the FFT signal, , The communication signal corresponding to the detected signal source can be confirmed as a radio disturbance signal.

The step of detecting the interference of the communication signal according to an exemplary embodiment of the present invention includes detecting a communication signal having the same hopping pattern based on the spectrum of the FFT signal, If it is detected, the communication signal generated in the same hopping pattern can be confirmed as a radio disturbance signal.

The method for monitoring radio wave interference according to an embodiment includes classifying a communication signal corresponding to the radio wave interference into one of a 1) radio disturbance signal or 2) a radio noise signal when a radio wave interference is generated for the communication signal As shown in FIG.

The step of classifying a signal according to an exemplary embodiment may detect a frequency and a bandwidth of a jamming signal corresponding to the radio wave disturbance signal when a communication signal corresponding to the radio wave interference is classified as a radio disturbance signal.

The method and apparatus for monitoring radio wave interference according to an embodiment of the present invention can analyze whether spectrum interference and packet information of a communication signal received in a mobile communication band are analyzed to immediately detect a radio wave interference of a communication signal.

The radio interference monitoring method and apparatus according to an embodiment of the present invention can automatically classify a horn interference source when interference or interference occurs in a communication signal received in a mobile communication band.

FIG. 1 is a configuration diagram for determining whether a communication signal received in a mobile communication band according to an embodiment is crosstalk.
2 is a detailed block diagram of a radio wave interference monitoring apparatus according to an embodiment of the present invention.
3 is a diagram showing a detailed configuration of a front end processing unit according to an embodiment.
4 is a flowchart illustrating a radio wave interference monitoring method according to an embodiment of the present invention.
5 is a flowchart illustrating a process of determining a cause of a radio wave interference caused in a communication signal according to an exemplary embodiment.
6 is a flowchart illustrating a final procedure for determining a normal communication signal according to an embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a configuration diagram for determining whether a communication signal received in a mobile communication band according to an embodiment is crosstalk.

Referring to FIG. 1, a radio wave interference monitoring apparatus 101 can receive communication signals 103 of a mobile communication band through an antenna 102. For example, the radio wave interference monitoring apparatus 101 may receive a plurality of communication signals 103 having a frequency form of a mobile communication band through an antenna 102. [ Here, although the antenna 102 is shown as being connected to the radio wave interference monitoring apparatus 101, it may exist separately and may receive the communication signals 103.

The radio wave interference monitoring device 101 can process a plurality of communication signals received in the mobile communication band at a preceding stage. Here, the radio wave interference monitoring apparatus 101 may apply a plurality of communication signals received in a mobile communication band to a filter bank according to a predetermined time unit. Then, the radio wave interference monitoring apparatus 101 can select one of the communication signals 103 based on the bandwidth of each of the plurality of filters constituting the filter bank. After that, the radio wave interference monitoring apparatus 101 amplifies the communication signal 104 selected through a low-noise amplifier (LNA), and then converts the pre-processed communication signal into an analog-to-digital conversion (ADC) can do.

The radio wave interference monitoring apparatus 101 can analyze the packet of the analog-to-digital converted communication signal and judge whether or not the communication signal is interrupted by the packet. Specifically, the radio wave interference monitoring apparatus 101 can decode the analog-to-digital converted communication signal and judge whether or not the communication signal is interrupted by the packet based on the decoded communication signal.

The radio wave interference monitoring apparatus 101 can analyze the spectrum of the analog-to-digital converted communication signal and judge whether or not the communication signal is interference based on the spectrum. Specifically, the radio wave interference monitoring apparatus 101 performs Fast Fourier Transform (FFT) on the analog-to-digital converted communication signal, and then determines whether or not the communication signal is interference based on the spectrum of the FFT- .

Here, in order to monitor and analyze the horn / interference of the communication signal having the frequency form of the mobile communication band, the radio wave interference monitoring apparatus 101 performs an operation of analyzing the packet of the communication signal and an operation of analyzing the waveform of the spectrum They can be made in parallel.

The radio wave interference monitoring apparatus 101 can determine whether or not a radio wave interference has occurred with respect to the communication signal in consideration of the interference of the communication signal by the determined packet and the interference of the communication signal by the spectrum. The radio wave interference monitoring apparatus 101 can automatically classify a horn interference source when interference or interference occurs in a communication signal received in the mobile communication band. In detail, when a radio wave interference with respect to a communication signal occurs, the radio wave interference monitoring apparatus 101 classifies the communication signal corresponding to the radio wave interference into one of the 1) radio disturbance signal or 2) can do.

Further, when the communication signal corresponding to the radio wave interference is classified as the radio wave disturbance signal, the radio wave interference monitoring device 101 can detect the frequency and the bandwidth of the jamming signal corresponding to the radio disturbance signal.

The present invention analyzes spectrum and packet information of a communication signal received in a mobile communication band to immediately monitor whether or not a radio wave interference of a communication signal has occurred and automatically classify a radio interference source according to interference or interference of a communication signal can do.

2 is a detailed block diagram of a radio wave interference monitoring apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the radio wave interference monitoring apparatus 201 monitors real-time communication signals received in a mobile communication band and can detect and classify radio waves including radio wave disturbance of a communication signal immediately and immediately. The radio frequency interference monitoring apparatus 201 includes a front end processing unit 202, an ADC unit 203, a signal decoding unit 204, a packet analysis unit 205, an FFT processing unit 206, (207) and a signal classifier (208).

The front end processor 202 can receive a plurality of communication signals through the antenna. Here, the front end processing unit 202 can receive only a plurality of communication signals having a frequency form of the mobile communication band according to a predetermined time unit. The front end processing unit 202 can apply the plurality of received communication signals to a filter bank. The filter bank is composed of a plurality of band-pass filters having a specific frequency band, and can filter communication signals by a band-pass filter. The pre-processing unit 202 selects one communication signal based on the bandwidth of the filter bank, and amplifies the selected communication signal through a low-noise amplifier (LNA). The front end processing unit 202 can transmit the amplified communication signal to the ADC unit 203.

The ADC unit 203 can convert a communication signal amplified by an analog-to-digital converter (ADC) from an analog signal to a digital signal. The ADC unit 203 can transmit the analog-to-digital converted communication signal to the signal decoding unit 204 and the FFT processing unit 206.

The signal decoding unit 204 can decode the analog-to-digital converted communication signal. In other words, the signal decoding unit 204 can decode the PHY packet information and the MAC packet information constituting the communication signal. Then, the signal decoding unit 204 can transmit the decoded PHY packet information and MAC packet information to the packet analyzing unit 205. [

After analyzing the received PHY packet information and MAC packet information, the packet analyzing unit 205 analyzes the received PHY packet information and MAC packet information, and determines whether or not the communication signal is a packet based on a packet of the communication signal . More specifically, the packet analyzing unit 205 analyzes the packet information related to the physical layer (PHY Layer) of the network constituting the communication signal and the packet information related to the MAC layer of the network, It can be judged primarily. In addition, the packet analyzing unit 205 can decode and analyze an upper layer from the PHY packet information and the MAC packet information of the received communication signal.

The FFT processing unit 206 can perform Fast Fourier Transform (FFT) on the analog-to-digital converted communication signal. The FFT processing unit 206 can perform a fast Fourier transform capable of continuous and high-speed processing in order to change the analog-to-digital converted communication signal into simpler components. Thereafter, the FFT processing unit 206 can transmit the fast Fourier transformed communication signal to the spectrum analyzer 207.

The spectrum analyzer 207 can analyze the spectrum of the FFT-processed communication signal to determine whether or not the communication signal is interference based on the spectrum. The spectrum analyzer 207 may analyze at least one of a signal source, an intensity, and an occurrence pattern based on the spectrum of the FFT-processed communication signal to primarily determine whether a communication signal is interrupted.

In detail, the spectrum analyzer 207 can detect a signal source having a constant intensity in the same communication signal based on the spectrum of the fast Fourier transformed communication signal. The spectrum analyzer 207 can identify a communication signal corresponding to the detected signal source as a propagation disturbance signal when a signal source with a predetermined intensity is detected. Also, the spectrum analyzer 207 can detect a communication signal having the same hopping pattern based on the spectrum of the fast Fourier transformed communication signal. When a communication signal having a hopping pattern is detected, the spectrum analyzer 207 can identify a communication signal generated in the same hopping pattern as a propagation disturbance signal.

In addition, the spectrum analyzer 207 may calculate the bandwidth of the communication signal, the received signal strength, and the center frequency. Then, the spectrum analyzer 207 can transmit the calculated result to the signal classifier 208.

The signal classifying unit 208 can determine whether or not a radio wave interference has occurred with respect to the communication signal in consideration of the interference of the communication signal by the determined packet and the interference of the communication signal by the spectrum. The signal classifying unit 208 classifies the communication signal corresponding to the radio wave interference into one of a 1) propagation disturbance signal or 2) radio noise signal when a radio wave interference with respect to a communication signal is generated. When no radio wave is generated in the communication signal, the signal classifying unit 208 can classify it into a normally received communication signal. The signal classifying unit 208 classifies the communication signal so as to finally determine whether or not the communication signal is interfered with.

The signal classifying unit 208 can detect a frequency and a bandwidth of a jamming signal (interference signal: jamming signal) corresponding to a radio disturbance signal when a communication signal corresponding to the radio wave interference is classified as a radio disturbance signal.

3 is a diagram showing a detailed configuration of a front end processing unit according to an embodiment.

3, the pre-processing unit 301 applies a plurality of communication signals received in a mobile communication band to a filter bank according to a predetermined time unit, selects one communication signal based on the bandwidth of the filter bank, LNA: Low-Noise Amplifier) to amplify the selected communication signal. For this, the front end processing unit 301 may include a frequency selection filter bank unit 302 and a low noise amplifier 303.

The frequency selection filter bank unit 302 can select only a communication signal of a frequency band to be processed by a band-pass filter for a mobile communication band. Here, the mobile communication band may be a frequency band of 700 MHz, 800 MHz, 900 MHz, 1.8 GHz, 2.1 GHz, 2.3 GHz, 2.6 GHz, 3.5 GHz, Bank).

The frequency selection filter bank unit 302 can selectively receive and process only one communication signal of one mobile communication band at a predetermined time interval. For example, the frequency selection filter bank unit 302 may receive the communication signals 305 of the mobile communication band through the antenna. The frequency selection filter bank unit 302 then applies the received communication signals 305 to the filter bank 304 and the filter bank 304 passes the plurality of bandpass filters of the communication signals 305 One communication signal 306 can be extracted. In other words, the frequency selection filter bank unit 302 can select one of the communication signals 305 through the filter bank 304. [

The low noise amplifier 303 can amplify the communication signal selected by the filter bank 304 (Filter Bank).

4 is a flowchart illustrating a radio wave interference monitoring method according to an embodiment of the present invention.

In step 401, the radio wave interference monitoring apparatus can process a plurality of communication signals received in the mobile communication band. In other words, the radio wave interference monitoring apparatus can apply a plurality of communication signals received in the mobile communication band to the filter bank according to a predetermined time unit, thereby selecting one communication signal based on the bandwidth of the filter bank. And, the radio wave interference monitoring device can amplify the communication signal selected through the low noise amplifier.

In step 402, the radio interference monitoring device can analog-to-digital convert the pre-processed communication signal.

In step 403, the radio interference monitoring device can analyze the packets of the analog-to-digital converted communication signal to determine whether or not the communication signal is interrupted by the packet. Specifically, the radio interference monitoring device can decode the analog-to-digital converted communication signal. Then, the radio wave interference monitoring apparatus judges whether or not the communication signal is crosstalk using the packet information related to the physical layer (PHY Layer) of the network constituting the decoded communication signal and the packet information related to the MAC layer of the network .

In step 404, the radio wave interference monitoring apparatus can analyze the spectrum of the analog-to-digital converted communication signal to determine whether or not the communication signal is interference based on the spectrum. In detail, the radio wave interference monitoring apparatus can perform fast Fourier transform of the analog-to-digital converted communication signal. The radio wave interference monitoring apparatus can analyze at least one of a signal source, an intensity, and a generation pattern based on a spectrum of a fast Fourier transformed communication signal to determine interference of a communication signal.

Here, the radio wave interference monitoring apparatus can detect a signal source of a constant intensity in the same communication signal based on the spectrum of the fast Fourier transformed communication signal. When a signal source of a predetermined intensity is detected, the radio interference monitoring apparatus can confirm a communication signal corresponding to the detected signal source by using a radio disturbance signal.

Further, the radio wave interference monitoring apparatus can detect a communication signal having the same hopping pattern based on the spectrum of the fast Fourier transformed communication signal. When a communication signal having a hopping pattern is detected, the radio wave interference monitoring apparatus can confirm the communication signal generated in the same hopping pattern as a radio disturbance signal.

In step 405, the radio wave interference monitoring apparatus can determine whether a radio wave interference has occurred with respect to the communication signal in consideration of interference of the communication signal by the determined packet and interference of the communication signal by the spectrum. When a radio wave interference is generated with respect to a communication signal, the radio frequency interference monitoring apparatus can classify a communication signal corresponding to radio wave interference into one of a 1) a radio disturbance signal or 2) a radio noise signal.

When the communication signal corresponding to the radio wave interference is classified as the radio disturbance signal, the radio frequency interference monitoring apparatus can detect the frequency and the bandwidth of the jamming signal corresponding to the radio disturbance signal.

5 is a flowchart illustrating a process of determining a cause of a radio wave interference caused in a communication signal according to an exemplary embodiment.

In step 501, the radio interference monitoring device can confirm whether the bandwidth of the mobile signal of the communication signal is satisfied. In other words, the radio wave interference monitoring apparatus can confirm the signal bandwidth of the received signal corresponding to the bandwidth of the band-pass filter through which the communication signal passes among the plurality of band-pass filters constituting the filter bank.

If the bandwidth of the movement signal of the communication signal is checked (step 501: Yes), the radio wave interference monitoring device demodulates the waveform of the received signal in step 502 and classifies it into a plurality of PHY packets per channel have. Then, the radio wave interference monitoring device can analyze the normal state of the received signal by extracting the PHY headers for each channel in the classified PHY packets for each channel.

When the analysis of the packet information related to the physical layer is completed (Step 502: Yes), in Step 503, the radio interference monitoring device demultiplexes the PHY packets according to the channel transmitted in Step 502, And can be processed as logical channels of the MAC layer through a mapping process. The radio wave interference monitoring apparatus can extract and analyze the MAC header for each logical channel of a plurality of MAC layers to determine whether the packet is a normal packet.

Demodulates the waveform of the signal into a plurality of PHY channel packets. The PHY headers for each channel are extracted from the classified PHY packets for each channel to analyze whether they are normal or not.

In step 504, the radiocommunication monitoring apparatus may analyze the L3 (Layer-3) parameter. In other words, the radio interference monitoring device can classify whether or not the normal communication signal is normal through whether the messages are normally formatted and normal sequence through the L3 parameter message analysis.

The radio wave interference monitoring apparatus can classify the communication signal into the normal mobile packet signal 506 when the result of the analysis through steps 502, 503, and 504 does not include a separate radio disturbance signal.

In addition, if the received signal does not satisfy the bandwidth of the communication signal (No at step 501), at step 505, the radio interference monitoring device can confirm the intensity and the center frequency of the communication signal. Here, in the process of analyzing the spectrum of the communication signal, the radio wave interference monitoring apparatus can calculate the intensity and center frequency of the communication signal. Then, the radio wave interference monitoring apparatus can confirm the intensity and the center frequency of the calculated communication signal.

Thereafter, the radio wave interference monitoring apparatus can classify the communication signal as a jamming (interference) signal 507 when a separate radio disturbance signal is included in the result of the analysis through steps 502 to 504. [

If the intensity of the communication signal and the center frequency are not confirmed (step 505: No), the radio interference monitoring device can classify the communication signal into the radio noise signal 508.

6 is a flowchart illustrating a final procedure for determining a normal communication signal according to an embodiment.

If the communication signal is classified as a normal packet based on FIG. 5, in step 601, the radio interference monitoring apparatus transmits a Mobile Country Code (MCC) and a Mobile Network Code (MNC) Can be decoded. Here, the mobile country code is a top-level Internet domain name, which may be a code for individual country units. For example, Korea may be a short alphabet code attached to each country represented by KR and US by US. Also, the mobile network code may be a code representing a network of a mobile network operator (MNO) having a frequency for providing mobile communication services. For example, the mobile network code can be expressed as KT, LGU, SKT, etc. as a domestic mobile communication carrier.

The radio wave interference monitoring apparatus can check whether the corresponding token signal is a domestic code by analyzing the parameters of the decoded mobile country code and the mobile network code.

In the case of a domestic code, the radio interference monitoring device can finally determine the communication signal as the domestic normal mobile communication signal 603.

Conversely, if it is not a local code, the radio wave interference monitoring device can finally determine the radio wave signal 604 as a registration code of a country other than the domestic normal mobile communication signal.

Meanwhile, the method according to the present invention may be embodied as a program that can be executed by a computer, and may be embodied as various recording media such as a magnetic storage medium, an optical reading medium, and a digital storage medium.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or combinations thereof. Implementations may be implemented in a computer program product, such as an information carrier, e.g., a machine readable storage device, such as a computer readable storage medium, for example, for processing by a data processing apparatus, Apparatus (computer readable medium) or as a computer program tangibly embodied in a propagation signal. A computer program, such as the computer program (s) described above, may be written in any form of programming language, including compiled or interpreted languages, and may be stored as a stand-alone program or in a module, component, subroutine, As other units suitable for use in the present invention. A computer program may be deployed to be processed on one computer or multiple computers at one site or distributed across multiple sites and interconnected by a communications network.

Processors suitable for processing a computer program include, by way of example, both general purpose and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The elements of a computer may include at least one processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer may include one or more mass storage devices for storing data, such as magnetic, magneto-optical disks, or optical disks, or may receive data from them, transmit data to them, . ≪ / RTI > Information carriers suitable for embodying computer program instructions and data include, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks and magnetic tape, compact disk read only memory A magneto-optical medium such as a floppy disk, an optical disk such as a DVD (Digital Video Disk), a ROM (Read Only Memory), a RAM , Random Access Memory), a flash memory, an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and the like. The processor and memory may be supplemented or included by special purpose logic circuitry.

In addition, the computer-readable medium can be any available media that can be accessed by a computer, and can include both computer storage media and transmission media.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various device components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and devices will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

101: Radio wave interference monitor
102: Antenna
103, 104: communication signal

Claims (1)

Processing a plurality of communication signals received in a mobile communication band;
Performing analog-digital conversion (ADC) on the pre-processed communication signal;
Analyzing a packet of the analog-to-digital converted communication signal to determine whether the communication signal is interrupted by the packet;
Analyzing a spectrum of the analog-to-digital converted communication signal to determine whether the communication signal is crosstalk based on the spectrum; And
Determining whether a radio wave interference has occurred with respect to the communication signal in consideration of whether or not the communication signal is interfered with the determined packet and whether the communication signal is interfered with the spectrum;
And a radio frequency interference monitoring method.

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