WO2018154772A1 - Signal detection device, sampling device, illegal radio wave monitoring system, signal source position estimation system, interference prevention communication system, and signal waveform data collection method - Google Patents

Signal detection device, sampling device, illegal radio wave monitoring system, signal source position estimation system, interference prevention communication system, and signal waveform data collection method Download PDF

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Publication number
WO2018154772A1
WO2018154772A1 PCT/JP2017/007445 JP2017007445W WO2018154772A1 WO 2018154772 A1 WO2018154772 A1 WO 2018154772A1 JP 2017007445 W JP2017007445 W JP 2017007445W WO 2018154772 A1 WO2018154772 A1 WO 2018154772A1
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WIPO (PCT)
Prior art keywords
signal
sampling
communication
unit
message
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PCT/JP2017/007445
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French (fr)
Japanese (ja)
Inventor
靖貴 山下
重紀 谷
康義 能田
元吉　克幸
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三菱電機株式会社
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Priority to JP2018565439A priority Critical patent/JP6479299B2/en
Priority to PCT/JP2017/007445 priority patent/WO2018154772A1/en
Publication of WO2018154772A1 publication Critical patent/WO2018154772A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the present invention relates to a signal detection device, a sampling device, an illegal radio wave monitoring system, a signal source position estimation system, an interference avoidance communication system, and a signal waveform data collection method used in radio wave monitoring.
  • a radio wave sensor removes unnecessary radio wave information and notifies the host device of necessary radio wave information.
  • the radio wave sensor determines whether or not at least one of the frequency, bandwidth, appearance time, and the like of the received signal matches a preset signal, and obtains it according to a preset modulation method, modulation speed, and the like.
  • the unnecessary radio wave information is automatically removed by determining whether or not the frequency distribution of the received signal matches the frequency distribution of the received signal.
  • the radio wave sensor cannot extract necessary radio wave information when all of these are unknown.
  • the radio wave sensor notifies the host device including unnecessary radio wave information, and there is a problem that the amount of data to be notified to the host device increases.
  • the present invention has been made in view of the above, and an object thereof is to obtain a signal detection device capable of reducing the amount of waveform information to be notified to a host device.
  • the signal detection device of the present invention obtains a valid signal information list indicating signal reception states from a plurality of sampling devices, and has a signal strength defined from the signals. From the combination of the signal detection unit for detecting the first signal and the effective signal information list, a combination of the second signals that are signals used in communication in the same frequency band among the first signals is detected, A combination detection unit that generates connection information indicating a combination of a sampling device as a transmission source of an effective signal information list including the reception state of the second signal and a reception period of the second signal.
  • the signal detection device generates a signal extraction message indicating an extraction period of the signal waveform data of the signal received by the sampling device based on the connection information, and transmits the signal extraction message to the sampling device corresponding to the connection information;
  • a message receiving unit that outputs to the signal detection unit when the valid signal information list is received from the sampling device and transmits to the host device when signal waveform data that is a response to the signal extraction message is received from the sampling device. It is characterized by that.
  • the signal detection device has an effect that the amount of waveform information to be notified to the host device can be reduced.
  • FIG. 1 is a block diagram showing a configuration example of a signal detection device according to a first exemplary embodiment
  • 1 is a diagram illustrating an example of a hardware configuration of a signal detection device according to a first embodiment
  • 1 is a block diagram showing a configuration example of a sampling device according to a first embodiment
  • 1 is a diagram illustrating an example of a hardware configuration of a sampling device according to a first embodiment
  • 1 is a flowchart showing an example of the operation of the signal detection device according to the first exemplary embodiment
  • FIG. 2 is a flowchart showing an example of the operation of the sampling apparatus according to the first embodiment.
  • FIG. 3 is a sequence diagram showing the relationship between the operation of the signal detection device and the operation of the sampling device according to the first embodiment.
  • positioning The figure which shows the structural example of the signal source position estimation system concerning Embodiment 3.
  • FIG. 1 The figure which shows the example of the information of the effective signal information list from the sampling device when the combination detection part of the signal detection apparatus concerning Embodiment 3 estimates the position of a signal source
  • FIG. 4 The figure which shows the structural example of the interference avoidance communication system concerning Embodiment 4.
  • FIG. 1 is a diagram illustrating a configuration example of a signal detection system 900 according to the first embodiment of the present invention.
  • the signal detection system 900 includes a signal detection device 100, sampling devices 200-1 to 200-6 that are radio wave sensors, and a host device 300. If the sampling devices 200-1 to 200-6 are not distinguished, they may be referred to as sampling devices 200. In FIG. 1, the number of sampling devices 200 is six, but this is an example, and the number may be more or less than six. All devices including the signal detection device 100 and the sampling device 200 are assigned unique physical or logical identifiers.
  • the signal detection device 100 acquires signal waveform data from which unnecessary radio waves are removed from each of the six sampling devices 200, and transmits the acquired signal waveform data to the host device 300.
  • FIG. 2 is a block diagram of a configuration example of the signal detection apparatus 100 according to the first embodiment.
  • the signal detection apparatus 100 includes a wireless transmission / reception unit 101, a message reception unit 102, a signal detection unit 103, a combination detection unit 104, a message transmission unit 105, and an antenna 106.
  • the wireless transmission / reception unit 101 transmits / receives a wireless signal including a message to / from the sampling devices 200-1 to 200-6 via the antenna 106.
  • the message receiving unit 102 determines the message content included in the wireless signal received by the wireless transmitting / receiving unit 101. For example, when the message content included in the radio signal is a valid signal information list, the message receiving unit 102 outputs the valid signal information list to the signal detecting unit 103. In addition, when the message content included in the radio signal is signal waveform data, the message receiving unit 102 transmits the signal waveform data to the higher-level device 300.
  • the signal detection unit 103 uses the effective signal information list from the sampling devices 200-1 to 200-6 acquired from the message reception unit 102 to detect a fixed length signal having a prescribed signal strength.
  • the fixed length signal is the first signal. Detailed operation of the signal detection unit 103 will be described later.
  • the combination detection unit 104 detects a combination of second signals, which are signals used in communication in the same frequency band among fixed-length signals, from the combination of the valid signal information list.
  • the combination detection unit 104 creates connection information indicating the combination of the sampling device 200 that is the transmission source of the effective signal information list including the reception state of the second signal and the reception period of the second signal.
  • the connection information includes identifier information of each sampling device 200 indicating the combination of the sampling devices 200.
  • the reception period of the second signal only needs to include the period in which each sampling apparatus 200 receives the second signal, and may be in a range larger than the actual reception period.
  • a connection list is a collection of multiple connection information. Detailed operation of the combination detection unit 104 will be described later.
  • the message transmission unit 105 transmits the generated message to the sampling device 200. Specifically, the message transmission unit 105 generates a message containing a trigger signal that instructs the sampling device 200 to start sampling, and outputs the message to the wireless transmission / reception unit 101.
  • the wireless transmission / reception unit 101 generates a wireless signal whose message content is a trigger signal, and transmits the wireless signal via the antenna 106 with all sampling devices 200 as a destination or broadcast. Further, the message transmission unit 105 generates a signal extraction message indicating the extraction period of the signal waveform data of the signal received by the sampling device 200 based on the connection list, that is, each connection information, and outputs the signal extraction message to the wireless transmission / reception unit 101.
  • the radio transmission / reception unit 101 generates a radio signal including a signal extraction message, and transmits a radio signal via the antenna 106 to the sampling device 200 corresponding to the connection information, that is, the sampling device 200 corresponding to the identifier included in the signal extraction message. Send.
  • FIG. 3 is a diagram illustrating an example of a hardware configuration of the signal detection apparatus 100 according to the first embodiment.
  • the signal detection apparatus 100 is realized by a processor 120, a storage 121, a memory 122, and a wireless transceiver 123.
  • the wireless transceiver 101 is a wireless transceiver 123.
  • the wireless transceiver 123 is assumed to also include the antenna 106.
  • the message reception unit 102, the signal detection unit 103, the combination detection unit 104, and the message transmission unit 105 are realized by software, firmware, or a combination of software and firmware.
  • Software and firmware are described as programs and stored in the memory 122. Each function is realized by the processor 120 reading and executing the program stored in the memory 122. When recording information while the program is being executed, the memory 122 may be used to hold data, or the storage 121 may be used to hold data.
  • the message reception unit 102, the signal detection unit 103, the combination detection unit 104, and the message transmission unit 105 are realized by a processing circuit including the processor 120, the storage 121, and the memory 122.
  • the processor 120 is, for example, a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, DSP (Digital Signal Processor)).
  • the storage 121 and the memory 122 include, for example, RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory), etc.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • flash memory for example, RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory), etc.
  • Non-volatile or volatile semiconductor memory magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disk), and the like.
  • the processing circuit including the processor 120, the storage 121, and the memory 122 may be realized by dedicated hardware.
  • the processing circuit can be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or It is a combination of these.
  • FIG. 4 is a block diagram of a configuration example of the sampling apparatus 200-1 according to the first embodiment.
  • Sampling apparatus 200-1 includes radio transmission / reception unit 201, message reception unit 202, radio reception unit 203, signal waveform recording unit 204, spectrogram creation unit 205, valid signal determination unit 206, message transmission unit 207, The signal waveform extracting unit 208 and the antennas 209 and 210 are provided.
  • the antennas 209 and 210 may be separate antennas or a common antenna.
  • the wireless transmission / reception unit 201 transmits / receives a wireless signal including a message between the signal detection device 100 and other surrounding sampling devices 200 via the antenna 209.
  • the message reception unit 202 determines the message content included in the wireless signal received by the wireless transmission / reception unit 201. For example, when the message content included in the wireless signal is a trigger signal, the message receiving unit 202 outputs the trigger signal to the wireless receiving unit 203. Further, when the message content included in the radio signal is a connection list, the message receiving unit 202 outputs the connection list to the signal waveform extracting unit 208.
  • the wireless reception unit 203 starts sampling based on an instruction from the signal detection device 100, that is, a trigger signal. Specifically, the wireless reception unit 203 receives a signal transmitted / received around its own device via the antenna 210, converts the signal from a radio frequency to an intermediate frequency, and further converts an analog signal to a digital signal. Processing is performed, and signal waveform data that is digital data of the waveform of the received signal is stored in the signal waveform recording unit 204. For example, the wireless reception unit 203 receives an illegal wireless signal transmitted / received around the own device. Unlike the wireless transmission / reception unit 201 transmitting / receiving a specific wireless signal, the wireless reception unit 203 receives an unspecified wireless signal.
  • the signal waveform recording unit 204 stores signal waveform data of a signal received by sampling in the wireless reception unit 203.
  • the spectrogram creating unit 205 creates a spectrogram in which the spectrum intensity is mapped in the time direction and the frequency direction using the signal waveform data stored in the signal waveform recording unit 204.
  • the valid signal determination unit 206 removes signal components such as noise from the spectrogram created by the spectrogram creation unit 205 and detects a valid signal that is a candidate signal used in communication.
  • the effective signal determination unit 206 calculates an effective frequency band, a reception start time, a reception duration, a reception end time, an average reception power, and the like for the detected effective signal, and creates an effective signal information list including these pieces of information. . Detailed operation of the valid signal determination unit 206 will be described later.
  • the signal waveform extraction unit 208 extracts the signal waveform data of the extraction period designated by the signal extraction message from the signal detection device 100 from the signal waveform recording unit 204.
  • the message transmission unit 207 transmits the generated message to the signal detection device 100. Specifically, the message transmission unit 207 generates a message containing the valid signal information list created by the valid signal determination unit 206 or the signal waveform data extracted by the signal waveform extraction unit 208, and the wireless transmission / reception unit 201. Output to. The wireless transmission / reception unit 201 generates a wireless signal having a valid signal information list or signal waveform data as a message content, and transmits the wireless signal to the signal detection apparatus 100 via the antenna 209.
  • FIG. 5 is a diagram illustrating an example of a hardware configuration of the sampling apparatus 200-1 according to the first embodiment.
  • the sampling device 200-1 is realized by a processor 220, a storage 221, a memory 222, an A / D converter 223, a wireless receiver 224, and a wireless transmitter / receiver 225.
  • the wireless transceiver 201 is a wireless transceiver 225.
  • the wireless transceiver 225 also includes an antenna 209.
  • the wireless reception unit 203 is an A / D converter 223 and a wireless receiver 224.
  • the wireless receiver 224 also includes the antenna 210.
  • the signal waveform recording unit 204 is a storage 221 or a memory 222.
  • the message reception unit 202, spectrogram creation unit 205, valid signal determination unit 206, message transmission unit 207, and signal waveform extraction unit 208 are realized by software, firmware, or a combination of software and firmware.
  • Software and firmware are described as programs and stored in the memory 222. Each function is realized by the processor 220 reading and executing the program stored in the memory 222. Data holding necessary for execution of each function program and recording of information by the signal waveform recording unit 204 are performed using the memory 222 or the storage 221.
  • the message reception unit 202, spectrogram creation unit 205, valid signal determination unit 206, message transmission unit 207, and signal waveform extraction unit 208 are realized by a processing circuit including the processor 220, the storage 221, and the memory 222. .
  • the processor 220 is, for example, a CPU.
  • the storage 221 and the memory 222 correspond to, for example, a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, and an EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD. .
  • the processing circuit including the processor 220, the storage 221, and the memory 222 may be realized by dedicated hardware.
  • the processing circuit is, for example, a single circuit, a composite circuit, a programmed processor, a processor programmed in parallel, an ASIC, an FPGA, or a combination thereof.
  • the signal detection device 100 and the sampling device 200 use the identifier assigned to each device as described above when identifying the communication partner.
  • the identifier for example, a known address used in the data link layer, the network layer, or other layers can be used.
  • FIG. 6 is a flowchart of an example of the operation of the signal detection apparatus 100 according to the first embodiment.
  • the flowchart shown in FIG. 6 is an example, and if necessary, the order of the processes may be changed, or the processes may be parallelized.
  • About the value and threshold value which are set to the signal detection apparatus 100 you may set from the high-order apparatus 300, and a user may set to the signal detection apparatus 100 previously.
  • the message transmission unit 105 In the signal detection apparatus 100, the message transmission unit 105 generates a trigger signal for instructing the start of sampling.
  • the trigger signal includes information on a period during which sampling is performed, that is, a signal is received by the sampling apparatus 200, such as a sampling start time and a sampling time or a sampling end time.
  • the message transmission unit 105 transmits a message containing the generated trigger signal to the sampling device 200 (step S1). Specifically, the message transmission unit 105 outputs a message containing the generated trigger signal to the wireless transmission / reception unit 101.
  • the wireless transmission / reception unit 101 generates a wireless signal whose message content is a trigger signal, and transmits the wireless signal via the antenna 106 with all sampling devices 200 as a destination or broadcast.
  • the wireless transmission / reception unit 101 When the wireless transmission / reception unit 101 receives a wireless signal from the sampling device 200 via the antenna 106, the wireless transmission / reception unit 101 passes a message included in the wireless signal to the message reception unit 102. When the message includes a valid signal information list, the message receiving unit 102 acquires and holds the valid signal information list (step S2).
  • step S3: No When there is a sampling device 200 that has not acquired the valid signal information list (step S3: No), the wireless transmission / reception unit 101 and the message reception unit 102 repeatedly perform the process of step S2.
  • the message receiving unit 102 When the valid signal information list is acquired from all the sampling devices 200 (step S3: Yes), the message receiving unit 102 outputs the valid signal information list to the signal detecting unit 103.
  • the message receiving unit 102 may collect and output the effective signal information lists of all the sampling devices 200 to the signal detecting unit 103, or each time the effective signal information list is acquired from each sampling device 200. The signal may be output to the signal detection unit 103.
  • the signal detection unit 103 detects a fixed-length signal using the valid signal information list of all the sampling devices 200 acquired from the message reception unit 102 (step S4). For example, the signal detection unit 103 creates a histogram with the signal lengths of all signals included in the valid signal information list, and detects signals having a ratio exceeding a set threshold as fixed-length signals. Alternatively, the signal detection unit 103 classifies signals as feature vectors using one or more pieces of information such as reception frequency bands included in the effective signal information list for the signals included in the effective signal information list, and the classified clusters A signal with a variance within a certain value is detected as a fixed-length signal. These methods of detecting the fixed length signal in the signal detection unit 103 are examples, and are not limited to these methods. The signal detection unit 103 outputs the detected fixed-length signal information to the combination detection unit 104 together with the acquired valid signal information list.
  • the combination detection unit 104 extracts two effective signal information lists from all the effective signal information lists acquired from the signal detection unit 103, and uses the same frequency band of fixed-length signals from the combination of the two extracted effective signal information lists. It is confirmed whether or not a combination of signals used in the communication is detected (step S5).
  • a signal used in communication in the same frequency band is defined as a second signal.
  • the combination detection unit 104 includes the same effective frequency band described in each effective signal information list, and the effective frequency band is the same. It is determined that the bands match, and it is determined that a combination of signals used in communication in the same frequency band has been detected (step S5: Yes).
  • the bandwidth is equivalent, for example, the range of error in which the bandwidth of the effective frequency band described in the other effective signal information list is defined with respect to the bandwidth of the effective frequency band described in one of the effective signal information lists This is the case.
  • the combination detection unit 104 is an area in which fixed-length signals are arranged at equal density from the valid signal information lists of two sampling devices 200 and the sampling devices 200 alternately receive fixed-length signals.
  • the combination detection unit 104 selects a combination of signals used in communication in the same frequency band based on the reception frequency and reception order of the fixed-length signals in the two sampling devices 200. It is determined that it has been detected.
  • the combination detection unit 104 adds the identifier combinations of the two sampling devices 200 to the combination list. Based on the valid signal information list associated with the two sampling devices 200 added to the combination list, the combination detection unit 104 assumes that there is a call-response relationship in one communication. Communication exchange is detected as a connection. Specifically, the communication device A is around one sampling device 200 of the two sampling devices 200, the communication device B is around the other sampling device 200, and one sampling device 200 is connected to the communication device A from the communication device A. It is assumed that the wireless signal transmitted to the communication device B is received and the other sampling device 200 receives the wireless signal transmitted from the communication device B to the communication device A.
  • the combination detection unit 104 creates connection information for the detected connection by utilizing the fact that the same number of fixed-length signals exist in the connection and that one connection is dense in time (step S6).
  • the connection information includes information on the combination of the sampling devices 200 as the transmission source in the effective signal information list including the reception state of the second signal, and information on the reception period of the second signal. Information on the combination of the sampling devices 200 is indicated by an identifier of each sampling device 200.
  • the information on the reception period of the second signal may be a reception start time and a reception duration, or a reception start time and a reception end time.
  • the combination detection unit 104 sets the connection information as a connection list, and adds the created connection information to the connection list.
  • FIG. 7 is a diagram illustrating an example of a connection list created by the combination detection unit 104 of the signal detection apparatus 100 according to the first embodiment.
  • the connection list includes items of a sampling device, a reception start time, and a reception end time, and one line is one connection information.
  • the items of the sampling device use the codes of the sampling devices 200 such as 200-1 and 200-2 shown in FIG. 1, but actually use the identifier of the sampling device 200.
  • the reception end time item may be the reception duration.
  • the combination detection unit 104 for all the connection information added to the connection list, based on the reception start time and the reception duration included in each valid signal information list, or the reception start time and the reception end time, Check whether a signal exists at the same time.
  • the combination detection unit 104 determines that there is no relationship between call and response for connection information in which a signal exists at the same time in the same frequency band, that is, does not perform communication, and deletes it from the connection list.
  • the combination detection unit 104 deletes, for example, a signal other than the signal having the highest average received power from the corresponding valid signal information list and deletes it from the connection list for connection information in which signals exist at the same time in the same frequency band. You may make it not.
  • the combination detection unit 104 includes the identifier of the sampling device 200 corresponding to the combination of the valid signal information list, the reception start time and the reception duration of the second signal, or the reception start time and the reception included in each connection information of the connection list. Information on the end time is notified to the message transmission unit 105.
  • the combination detection unit 104 notifies the message transmission unit 105 of retransmission of the trigger signal when the combination of signals used in communication in the same frequency band cannot be detected (step S5: No).
  • the process returns to step S1 and the above-described processing is repeatedly performed.
  • the combination detection unit 104 can detect a combination of signals used in communication in the same frequency band (step S5: Yes), but the connection list is excluded from the connection list as a result of the process of removing the connection information from the connection list.
  • the message transmission unit 105 may be notified of retransmission of the trigger signal, as in step S5: No.
  • the message transmission unit 105 generates a signal extraction message for collecting signal waveform data of signals included in the connection list from the sampling device 200 based on the information acquired from the combination detection unit 104.
  • the signal extraction message includes information about the reception start time and reception duration of the second signal, or the reception start time and reception end time. Further, the signal extraction message includes an identifier of the sampling device 200 corresponding to the combination of the valid signal information list.
  • the message transmission unit 105 transmits the generated signal extraction message to the sampling device 200 (step S7).
  • the message transmission unit 105 outputs the generated signal extraction message to the wireless transmission / reception unit 101.
  • the wireless transmission / reception unit 101 generates a wireless signal including a signal extraction message, and transmits the wireless signal via the antenna 106 with the sampling device 200 that is the target of the signal extraction message as a destination or broadcast.
  • the sampling device 200 that is not subject to the signal extraction message discards the radio signal including the received signal extraction message.
  • the signal detection device 100 indicates that there is no need to transmit the signal waveform data to the sampling device 200 that is not the target of the signal extraction message, that is, the sampling device 200 that does not need to transmit the signal waveform data.
  • An extraction message may be sent. Thereby, the sampling apparatus 200 can avoid the situation where it waits for the response from the signal detection apparatus 100, that is, the signal extraction message after transmitting the valid signal information list.
  • the wireless transmission / reception unit 101 When the wireless transmission / reception unit 101 receives a wireless signal from the sampling device 200 via the antenna 106, the wireless transmission / reception unit 101 passes a message included in the wireless signal to the message reception unit 102.
  • the message receiving unit 102 acquires the signal waveform data included in the message in response to the signal extraction message (step S8), the message receiving unit 102 transmits the acquired signal waveform data to the host device 300 (step S9). .
  • FIG. 8 is a flowchart illustrating an example of the operation of the sampling apparatus 200 according to the first embodiment.
  • the flowchart shown in FIG. 8 is an example, and if necessary, the order of the processes may be changed, or the processes may be parallelized.
  • the value and threshold value set in the sampling device 200 may be set from the signal detection device 100 or may be set in the sampling device 200 in advance by the user.
  • the wireless transmission / reception unit 201 when the wireless transmission / reception unit 201 receives a wireless signal from the signal detection device 100, the wireless transmission / reception unit 201 passes a message included in the wireless signal to the message reception unit 202.
  • the message receiving unit 202 waits until the content of the message receives a trigger signal for instructing the start of sampling (step S21: No).
  • the message reception unit 202 instructs the wireless reception unit 203 to start sampling according to the sampling period information included in the trigger signal.
  • the radio reception unit 203 starts sampling of the signal in synchronization with the other sampling devices 200 in the sampling period indicated by the trigger signal in accordance with the instruction from the message reception unit 202 (step S22).
  • an absolute time obtained from a GPS (Global Positioning System) device connected inside or outside the sampling device 200 is used as a sampling start time included in the trigger signal.
  • time synchronization may be performed using a time synchronization method using wireless communication, and a time synchronized within the network may be used.
  • the signal detection device 100 and the sampling device 200 constitute a star type system centered on the signal detection device 100
  • the sampling device 200 starts sampling from the time when the trigger signal is received from the signal detection device 100.
  • sampling may be started based on a relative time from when the trigger signal included in the trigger signal is received to when sampling is started.
  • the wireless reception unit 203 stores the signal waveform data obtained by sampling in the signal waveform recording unit 204.
  • the spectrogram creation unit 205 reads the signal waveform data from the signal waveform recording unit 204 and creates a spectrogram of the signal waveform data (step S23). For example, the spectrogram creating unit 205 performs fast Fourier transform (FFT) on the signal waveform data by shifting signal samples, and creates a spectrogram in which spectral intensities in the time direction and the frequency direction are mapped.
  • FFT fast Fourier transform
  • the valid signal determination unit 206 detects a signal from which a low-power signal such as noise has been removed as a valid signal using the spectrogram created by the spectrogram creation unit 205 (step S24).
  • the effective signal determination unit 206 may calculate the average power in the entire region of the signal as a method for removing the low-power signal, and detect a signal at a time and frequency equal to or higher than the average power as an effective signal. You may detect the signal more than the threshold value for which electric power was set as an effective signal.
  • the valid signal determination unit 206 may arrange the signals in the order of signal strength, and may set a set ratio, for example, a signal whose signal strength occupies the top 1% in the entire time as a valid signal. In addition, the valid signal determination unit 206 may use a combination of these methods.
  • the effective signal determination unit 206 divides the signal into a plurality of frequency bands using the set frequency division value, performs time integration of the signal intensity in each frequency band, and detects a frequency band having a large time integration value as an effective frequency band. (Step S25).
  • the effective signal determination unit 206 detects a section where a signal exists in the detected effective frequency band as an effective signal time (step S26).
  • the valid signal determination unit 206 may divide by a set time width and use a section in which a certain number of valid signals detected in step S24 exist as a valid signal time.
  • the signal intensity may be smoothed by signal processing such as the above, and an interval equal to or greater than the threshold may be set as the effective signal time.
  • the range of the effective signal time may be specified by the reception start time of the effective signal and the reception duration of the effective signal, or may be specified by the reception start time of the effective signal and the reception end time of the effective signal.
  • the effective signal determination unit 206 creates an effective signal information list including the effective frequency band obtained by the detection, the reception start time, the reception duration or the reception end time, and the average received power (step S27).
  • the valid signal determination unit 206 outputs the created valid signal information list to the message transmission unit 207.
  • the message transmission unit 207 generates a message containing the effective signal information list acquired from the signal waveform extraction unit 208, and transmits the effective signal information list to the signal detection device 100 (step S28). Specifically, the message transmission unit 207 outputs the generated message to the wireless transmission / reception unit 201.
  • the wireless transmission / reception unit 201 generates a wireless signal having the effective signal information list as a message content, and transmits the generated wireless signal to the signal detection apparatus 100 via the antenna 106.
  • the wireless transmission / reception unit 201 When the wireless transmission / reception unit 201 receives a wireless signal from the signal detection device 100, the wireless transmission / reception unit 201 passes a message included in the wireless signal to the message reception unit 202. The message receiving unit 202 waits until a signal extraction message is received (step S29: No). When receiving the signal extraction message (step S29: Yes), the message reception unit 202 outputs the signal extraction message to the signal waveform extraction unit 208. Note that when the sampling device 200 receives a signal extraction message indicating that there is no need to transmit signal waveform data from the signal detection device 100, the subsequent processing is omitted.
  • the sampling apparatus 200 determines that there is no need to transmit the signal waveform data when the signal extraction message cannot be received from the signal detection apparatus 100 even after a specified time has elapsed after transmitting the valid signal information list. However, the subsequent processing may be omitted.
  • the signal waveform extraction unit 208 extracts the signal waveform data of the extraction period indicated by the signal extraction message from the signal waveform recording unit 204 based on the signal extraction message acquired from the message reception unit 202 (step S30).
  • the signal waveform extraction unit 208 outputs the extracted signal waveform data to the message transmission unit 207.
  • the message transmission unit 207 generates a message containing the signal waveform data acquired from the signal waveform extraction unit 208, and transmits the signal waveform data to the signal detection device 100 (step S31). Specifically, the message transmission unit 207 outputs the generated message to the wireless transmission / reception unit 201.
  • the radio transmission / reception unit 201 generates a radio signal having the signal waveform data as a message content, and transmits the generated radio signal to the signal detection apparatus 100 via the antenna 106.
  • the sampling device 200 may end the subsequent processing, or may notify the signal detection device 100 that the valid signal has not been detected.
  • FIG. 9 is a sequence diagram illustrating the relationship between the operation of the signal detection device 100 and the operation of the sampling device 200 according to the first embodiment.
  • FIG. 6 illustrates the operation of the signal detection apparatus 100
  • FIG. 8 illustrates the operation of the sampling apparatus 200.
  • the signal detection system 900 as shown in FIG. 9, first, as an instruction step, the signal detection device 100 performs the operation of step S1. Next, as the effective signal information list transmission step, the sampling apparatus 200 performs the operations from step S21 to step S28. Next, as a signal extraction message transmission step, the signal detection device 100 performs the operations from step S2 to step S7.
  • FIG. 9 shows the operation of the signal waveform data collection method by the signal detection system 900.
  • the effective signal information list includes the effective frequency band, the reception start time, the reception duration or the reception end time, and the average reception power, but is not limited to this, and the effective frequency band, the reception start time In addition, at least one of reception duration, reception end time, and average reception power may be included.
  • the signal detection device 100 first collects the effective signal information list having a smaller communication data amount than the signal waveform data from the sampling device 200, and each sampling device The necessary extraction period of the signal waveform data is determined from the combination of the valid signal information lists collected from 200 and notified to each sampling device 200.
  • Each sampling device 200 transmits the signal waveform data instructed in the extraction period to the signal detection device 100.
  • Embodiment 2 FIG. In the first embodiment, the specific operations of the signal detection device 100 and the sampling device 200 have been described. In Embodiment 2, an illegal radio wave monitoring system for monitoring illegal radio waves using these devices will be described.
  • FIG. 10 is a diagram illustrating a configuration example of the illegal radio wave monitoring system 910 according to the second embodiment.
  • the illegal radio wave monitoring system 910 includes a signal detection device 100, sampling devices 200-1 to 200-4, and a host device 300. Although there are four sampling devices 200 in FIG. 9, this is an example, and the number may be more or less than four.
  • the host device 300 is specifically an illegal radio wave monitoring device.
  • illegal radio wave sources 400-1 to 400-4 exist in the vicinity where the sampling device 200 is installed. If the illegal radio sources 400-1 to 400-4 are not distinguished, they may be referred to as illegal radio sources 400.
  • the sampling device 200 detects that the illegal radio wave sources 400-1 and 400-2 are performing illegal communication.
  • the sampling device 200 passes only the signal waveform data of the necessary part by the processing of the first embodiment with respect to the signal waveform data of the illegal radio wave sources 400-1 and 400-2 performing illegal communication via the signal detection device 100.
  • To the host device 300 which is an illegal radio wave monitoring device.
  • the configurations of the signal detection device 100 and the sampling device 200 are the same as those in the first embodiment.
  • the signal detection apparatus 100 creates connection information and creates a connection list.
  • FIG. 11 shows the contents of the connection list created by the signal detection device 100 according to the second embodiment based on the valid signal information list acquired from the sampling devices 200-1 to 200-4 in a specific signal arrangement. It is a figure which shows the example of time.
  • the signal detection apparatus 100 detects a fixed-length signal and divides a signal included in the information of the valid signal information list into a fixed-length signal and a non-fixed-length signal.
  • the combination detection unit 104 has signals in both the two sampling devices 200 in the short time domain for those having the same effective frequency band, and the fixed length signal and the non-fixed length signal are constant.
  • the areas 501 to 504 existing at the ratio are detected as connections.
  • the combination detection unit 104 excludes the connection information corresponding to the area 504 from the connection list, assuming that the area 504 in which a signal exists at the same time among the areas 501 to 504 does not have a call-response relationship. Further, the combination detection unit 104 excludes connection information corresponding to the region 503 from the connection list, assuming that there is no relationship between calling and response in the region 503 in which the two sampling devices 200 do not receive signals alternately.
  • connection information corresponding to the areas 501 and 502 remains in the connection list.
  • the illegal radio wave source 400 that performs illegal communication is the sampling device 200-1. , 200-2, it is determined that the position is close to the distance.
  • the combination detection unit 104 communicates with the second signal based on the position information of the sampling devices 200-1 and 200-2 corresponding to the connection information. It is possible to estimate the position of the communication system that is performing, that is, the illegal radio wave source 400.
  • the signal detection device 100 can notify the host device 300 that is an illegal radio wave monitoring device of positional information of the communication system of the illegal radio wave source 400.
  • the signal detection device 100 detects the position of the illegal radio wave source 400 based on the position information of the sampling device 200 that detected the illegal radio wave source 400 performing illegal communication. Can be estimated. Thereby, as in the first embodiment, the signal detection device 100 acquires the signal waveform data from which unnecessary radio waves are removed from the sampling device 200 and transmits the signal waveform data to the illegal radio wave monitoring device that is the host device 300, and also estimates the estimated illegal radio waves. The position information of the source 400 can also be transmitted to the illegal radio wave monitoring apparatus.
  • Embodiment 3 FIG. In the third embodiment, a signal source position estimation system that estimates the position of a signal source using the signal detection apparatus 100 and the sampling apparatus 200 will be described.
  • the configurations of the signal detection device 100 and the sampling device 200 are the same as those in the first embodiment.
  • the combination detection unit 104 of the signal detection device 100 does not determine that communication is not being performed for connections in which signals exist at the same time in the same frequency band, and signals transmitted from the same signal source. As a result, the position of the signal source is estimated.
  • FIG. 12 is a diagram illustrating a configuration example of the signal source position estimation system 920 according to the third embodiment.
  • the signal source position estimation system 920 includes a signal detection device 100, sampling devices 200-1 to 200-3, and a host device 300. In FIG. 12, there are three sampling devices 200, but this is an example, and the number may be more or less than three.
  • the signal source 500 exists in the vicinity where the sampling device 200 is installed.
  • the signal source position estimation system 920 estimates the position of the signal source 500 using the signal detection device 100 and the sampling device 200.
  • the combination detection unit 104 detects a fixed-length signal received at the same time in the same frequency band from the combination of the valid signal information list when detecting the connection.
  • the combination detection unit 104 for a region where a signal exists at the same time in the same frequency band, if a fixed-length signal exists similarly at a plurality of times in the connection, the average reception included in the effective signal information list Based on the power and the position information of the sampling devices 200-1 to 200-3, the position of the signal source 500 that is the transmission source of the detected fixed-length signal is estimated.
  • FIG. 13 is an example of information in the effective signal information list from the sampling devices 200-1 to 200-3 when the combination detection unit 104 of the signal detection device 100 according to the third embodiment estimates the position of the signal source 500.
  • FIG. 13 in the example of FIG. 13, in the effective signal information list acquired by the signal detection device 100, the average received power of the signal received by the sampling device 200-1 from the signal source 500 is the largest, and then the sampling device 200-3 receives the signal source. The average received power of the signal received from 500 is large, and the average received power of the signal received from the signal source 500 by the sampling device 200-2 is the smallest.
  • the combination detection unit 104 can estimate the position using, for example, the fact that the attenuation of radio waves is proportional to the square of the distance.
  • the signal detection device 100 when detecting a connection, has an average received power of each sampling device 200 in a region where a signal exists at the same time in the same frequency band, and Based on the position information of each sampling device 200, the position of the signal source 500 can be estimated.
  • Embodiment 4 when a connection is detected by the method of the first embodiment and the position of the signal source is estimated by the third embodiment or other methods, interference is prevented so that radio waves are not emitted around the signal source.
  • An interference avoidance communication system that performs avoidance communication will be described.
  • FIG. 14 is a diagram of a configuration example of the interference avoidance communication system 930 according to the fourth embodiment.
  • the interference avoidance communication system 930 includes a signal detection device 100, sampling devices 200-1 and 200-2, a host device 300, and interference avoidance communication devices 700-1 to 700-3.
  • the interference avoidance communication apparatuses 700-1 to 700-3 are not distinguished, they may be referred to as interference avoidance communication apparatuses 700.
  • the interference avoidance communication device 700 is a communication device including a known wireless transceiver and a directional antenna.
  • the interference avoidance communication apparatus 700 can communicate with another interference avoidance communication apparatus 700 that has received the communication permission instruction message only when the communication permission instruction message is received from the host apparatus 300 or the signal detection apparatus 100. It becomes.
  • the interference avoidance communication device 700 receives a communication stop instruction message from the host device 300 or the signal detection device 100, the interference avoidance communication device 700 immediately stops communication.
  • the signal detection apparatus 100 detects the connection between the sampling apparatuses 200-1 and 200-2 by the method of the first embodiment, and estimates the position of the signal source by the third embodiment or other methods. To do.
  • the signal detection device 100 or the host device 300 emits radio waves in the direction of the existing communication sources 600-1 and 600-2, specifically, the communication areas of the existing communication sources 600-1 and 600-2.
  • a communication permission instruction message instructing that communication is possible is transmitted to the communicable interference avoidance communication apparatuses 700-1 and 700-2.
  • the signal detection device 100 or the host device 300 communicates between the interference avoidance communication device 700-3 and the interference avoidance communication device 700-1, and the interference avoidance communication device 700-3 and the interference avoidance communication device 700-2.
  • the signal detection device 100 or the host device 300 considers communication between the existing communication sources 600-1 and 600-2, and the interference avoidance communication devices 700-1 and 700-2.
  • a communication permission instruction message instructing permission of only the communication between 700-2 is transmitted.
  • the interference avoidance communication device When the signal detection device 100 or the host device 300 determines that the communication environment of the surroundings changes and the communication of the interference avoidance communication devices 700-1 and 700-2 interferes with the existing communication source, for example, the interference avoidance communication device If either 700-1 or 700-2 is a movable terminal and one of them moves into the communication area of the existing communication source 600-1, 600-2, the communication stop instruction Is transmitted to the interference avoidance communication apparatuses 700-1 and 700-2.
  • Interference avoidance communication apparatuses 700-1 and 700-2 perform communication when a communication permission instruction message is received, and immediately stop communication when a communication stop instruction message is received.
  • control for transmitting a communication permission instruction message and a communication stop instruction message to the interference avoidance communication apparatuses 700-1 and 700-2 may be performed by the host apparatus 300, or the host apparatus 300 may detect a signal. You may make it transmit via the apparatus 100.
  • the combination detection unit 104 determines the interference avoidance communication devices 700-1 and 700-2 based on the connection detection result and the estimated positions of the existing communication sources 600-1 and 600-2. Control for transmitting a communication permission instruction message and a communication stop instruction message may be performed.
  • the interference avoidance communication system 930 uses the connection information detected by the same processing as in the first embodiment, the signal source estimated by the processing described in the third embodiment, and the like.
  • the interference avoidance communication apparatus 700 can perform communication without causing interference to existing communication by using the position information.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
  • 100 signal detection device 101, 201 wireless transmission / reception unit, 102, 202 message reception unit, 103 signal detection unit, 104 combination detection unit, 105, 207 message transmission unit, 106, 209, 210 antenna, 200-1 to 200-6 Sampling device, 203 wireless reception unit, 204 signal waveform recording unit, 205 spectrogram creation unit, 206 valid signal determination unit, 208 signal waveform extraction unit, 300 host device, 400-1 to 400-4 illegal radio wave source, 500 signal source, 600-1, 600-2, existing communication source, 700-1 to 700-3 interference avoidance communication device, 900 signal detection system, 910 illegal radio wave monitoring system, 920 signal source position estimation system, 930 interference avoidance communication system.

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Abstract

The present invention is provided with: a signal detection unit (103) that acquires valid signal information lists from a plurality of sampling devices and detects first signals; a combination detection unit (104) that detects, from combinations of the valid signal information lists, a combination of second signals that are signals used for communication in the same frequency band among the first signals and creates connection information indicating a period in which the second signals are received and a combination of sampling devices that are transmission sources of the valid signal information lists including a state in which the second signals are received; a message transmission unit (105) that generates, on the basis of the connection information, a signal extraction message indicating a period in which signal waveform data of the signals received by the sampling devices are extracted, and transmits the signal extraction message to the sampling devices corresponding to the connection information; and a message reception unit (102) that outputs the valid signal information lists to the signal detection unit upon reception of the valid signal information lists, and transmits the signal waveform data to a host device upon reception of the signal waveform data.

Description

信号検出装置、サンプリング装置、不法電波監視システム、信号源位置推定システム、干渉回避通信システムおよび信号波形データ収集方法Signal detection device, sampling device, illegal radio wave monitoring system, signal source position estimation system, interference avoidance communication system, and signal waveform data collection method
　本発明は、電波監視で使用される信号検出装置、サンプリング装置、不法電波監視システム、信号源位置推定システム、干渉回避通信システムおよび信号波形データ収集方法に関する。 The present invention relates to a signal detection device, a sampling device, an illegal radio wave monitoring system, a signal source position estimation system, an interference avoidance communication system, and a signal waveform data collection method used in radio wave monitoring.
　従来、電波監視装置において、電波センサは、不要な電波情報を除去して必要な電波情報を上位装置に通知していた。電波センサは、受信信号について、周波数、帯域幅、出現時間などのうち少なくとも１つが予め設定されたものと一致するか否かを判定し、また、予め設定された変調方式、変調速度などにより得られる周波数分布と受信信号の周波数分布とが一致するか否かを判定することによって自動的に不要な電波情報を除去する。このような技術が、特許文献１において開示されている。 Conventionally, in a radio wave monitoring device, a radio wave sensor removes unnecessary radio wave information and notifies the host device of necessary radio wave information. The radio wave sensor determines whether or not at least one of the frequency, bandwidth, appearance time, and the like of the received signal matches a preset signal, and obtains it according to a preset modulation method, modulation speed, and the like. The unnecessary radio wave information is automatically removed by determining whether or not the frequency distribution of the received signal matches the frequency distribution of the received signal. Such a technique is disclosed in Patent Document 1.
特許第３９０３８１４号公報Japanese Patent No. 3903814
　しかしながら、上記従来の技術によれば、周波数、帯域幅、変調方式、変調速度などの波形情報、または出現時間が既知である必要があった。そのため、電波センサは、これら全てが未知の場合は必要な電波情報を抽出できない。電波センサは、不要な電波情報も含めて上位装置に通知することになり、上位装置へ通知するデータ量が大きくなってしまう、という問題があった。 However, according to the above conventional technique, it is necessary to know waveform information such as frequency, bandwidth, modulation method, modulation speed, or appearance time. Therefore, the radio wave sensor cannot extract necessary radio wave information when all of these are unknown. The radio wave sensor notifies the host device including unnecessary radio wave information, and there is a problem that the amount of data to be notified to the host device increases.
　本発明は、上記に鑑みてなされたものであって、上位装置へ通知する波形情報のデータ量を削減可能な信号検出装置を得ることを目的とする。 The present invention has been made in view of the above, and an object thereof is to obtain a signal detection device capable of reducing the amount of waveform information to be notified to a host device.
　上述した課題を解決し、目的を達成するために、本発明の信号検出装置は、複数のサンプリング装置から信号の受信状態を示す有効信号情報リストを取得し、信号から規定された信号強度を有する第１の信号を検出する信号検出部と、有効信号情報リストの組み合わせから、第１の信号のうち同一周波数帯の通信で使用されている信号である第２の信号の組み合わせを検出し、第２の信号の受信状態が含まれる有効信号情報リストの送信元のサンプリング装置の組み合わせおよび第２の信号の受信期間を示すコネクション情報を作成する組み合わせ検出部と、を備える。また、信号検出装置は、コネクション情報に基づいて、サンプリング装置で受信された信号の信号波形データの抽出期間を示す信号抽出メッセージを生成し、コネクション情報に該当するサンプリング装置に送信するメッセージ送信部と、サンプリング装置から有効信号情報リストを受信した場合は信号検出部に出力し、サンプリング装置から信号抽出メッセージに対する応答である信号波形データを受信した場合は上位装置に送信するメッセージ受信部と、を備えることを特徴とする。 In order to solve the above-described problems and achieve the object, the signal detection device of the present invention obtains a valid signal information list indicating signal reception states from a plurality of sampling devices, and has a signal strength defined from the signals. From the combination of the signal detection unit for detecting the first signal and the effective signal information list, a combination of the second signals that are signals used in communication in the same frequency band among the first signals is detected, A combination detection unit that generates connection information indicating a combination of a sampling device as a transmission source of an effective signal information list including the reception state of the second signal and a reception period of the second signal. Further, the signal detection device generates a signal extraction message indicating an extraction period of the signal waveform data of the signal received by the sampling device based on the connection information, and transmits the signal extraction message to the sampling device corresponding to the connection information; A message receiving unit that outputs to the signal detection unit when the valid signal information list is received from the sampling device and transmits to the host device when signal waveform data that is a response to the signal extraction message is received from the sampling device. It is characterized by that.
　本発明にかかる信号検出装置は、上位装置へ通知する波形情報のデータ量を削減できる、という効果を奏する。 The signal detection device according to the present invention has an effect that the amount of waveform information to be notified to the host device can be reduced.
実施の形態１にかかる信号検出システムの構成例を示す図The figure which shows the structural example of the signal detection system concerning Embodiment 1. FIG. 実施の形態１にかかる信号検出装置の構成例を示すブロック図1 is a block diagram showing a configuration example of a signal detection device according to a first exemplary embodiment; 実施の形態１にかかる信号検出装置のハードウェア構成の一例を示す図1 is a diagram illustrating an example of a hardware configuration of a signal detection device according to a first embodiment; 実施の形態１にかかるサンプリング装置の構成例を示すブロック図1 is a block diagram showing a configuration example of a sampling device according to a first embodiment; 実施の形態１にかかるサンプリング装置のハードウェア構成の一例を示す図1 is a diagram illustrating an example of a hardware configuration of a sampling device according to a first embodiment; 実施の形態１にかかる信号検出装置の動作の例を示すフローチャート1 is a flowchart showing an example of the operation of the signal detection device according to the first exemplary embodiment; 実施の形態１にかかる信号検出装置の組み合わせ検出部が作成したコネクションリストの例を示す図The figure which shows the example of the connection list which the combination detection part of the signal detection apparatus concerning Embodiment 1 produced. 実施の形態１にかかるサンプリング装置の動作の例を示すフローチャート2 is a flowchart showing an example of the operation of the sampling apparatus according to the first embodiment. 実施の形態１にかかる信号検出装置の動作およびサンプリング装置の動作の関係を示すシーケンス図FIG. 3 is a sequence diagram showing the relationship between the operation of the signal detection device and the operation of the sampling device according to the first embodiment. 実施の形態２にかかる不法電波監視システムの構成例を示す図The figure which shows the structural example of the illegal radio wave monitoring system concerning Embodiment 2. 実施の形態２にかかる信号検出装置がサンプリング装置から取得した有効信号情報リストに基づいて作成したコネクションリストの内容を具体的な信号の配置で表したときの例を示す図The figure which shows the example when the signal detection apparatus concerning Embodiment 2 represents the content of the connection list produced based on the effective signal information list acquired from the sampling apparatus by specific signal arrangement | positioning. 実施の形態３にかかる信号源位置推定システムの構成例を示す図The figure which shows the structural example of the signal source position estimation system concerning Embodiment 3. 実施の形態３にかかる信号検出装置の組み合わせ検出部が信号源の位置を推定する際のサンプリング装置からの有効信号情報リストの情報の例を示す図The figure which shows the example of the information of the effective signal information list from the sampling device when the combination detection part of the signal detection apparatus concerning Embodiment 3 estimates the position of a signal source 実施の形態４にかかる干渉回避通信システムの構成例を示す図The figure which shows the structural example of the interference avoidance communication system concerning Embodiment 4. FIG.
　以下に、本発明の実施の形態にかかる信号検出装置、サンプリング装置、不法電波監視システム、信号源位置推定システム、干渉回避通信システムおよび信号波形データ収集方法を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, a signal detection device, a sampling device, an illegal radio wave monitoring system, a signal source position estimation system, an interference avoidance communication system, and a signal waveform data collection method according to embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
実施の形態１．
　図１は、本発明の実施の形態１にかかる信号検出システム９００の構成例を示す図である。信号検出システム９００は、信号検出装置１００と、電波センサであるサンプリング装置２００－１～２００－６と、上位装置３００と、を備える。サンプリング装置２００－１～２００－６を区別しない場合、サンプリング装置２００と称する場合がある。図１ではサンプリング装置２００は６台であるが、一例であり、６台より多くてもよいし少なくてもよい。信号検出装置１００およびサンプリング装置２００を含む全ての装置には、物理的または論理的な固有の識別子が割り当てられている。信号検出システム９００では、信号検出装置１００が、６台のサンプリング装置２００のそれぞれから不要電波を除去した信号波形データを取得し、取得した信号波形データを上位装置３００に送信する。 Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration example of a signal detection system 900 according to the first embodiment of the present invention. The signal detection system 900 includes a signal detection device 100, sampling devices 200-1 to 200-6 that are radio wave sensors, and a host device 300. If the sampling devices 200-1 to 200-6 are not distinguished, they may be referred to as sampling devices 200. In FIG. 1, the number of sampling devices 200 is six, but this is an example, and the number may be more or less than six. All devices including the signal detection device 100 and the sampling device 200 are assigned unique physical or logical identifiers. In the signal detection system 900, the signal detection device 100 acquires signal waveform data from which unnecessary radio waves are removed from each of the six sampling devices 200, and transmits the acquired signal waveform data to the host device 300.
　信号検出装置１００の構成について説明する。図２は、実施の形態１にかかる信号検出装置１００の構成例を示すブロック図である。信号検出装置１００は、無線送受信部１０１と、メッセージ受信部１０２と、信号検出部１０３と、組み合わせ検出部１０４と、メッセージ送信部１０５と、アンテナ１０６と、を備える。 The configuration of the signal detection device 100 will be described. FIG. 2 is a block diagram of a configuration example of the signal detection apparatus 100 according to the first embodiment. The signal detection apparatus 100 includes a wireless transmission / reception unit 101, a message reception unit 102, a signal detection unit 103, a combination detection unit 104, a message transmission unit 105, and an antenna 106.
　無線送受信部１０１は、アンテナ１０６を介して、サンプリング装置２００－１～２００－６との間でメッセージを含む無線信号を送受信する。 The wireless transmission / reception unit 101 transmits / receives a wireless signal including a message to / from the sampling devices 200-1 to 200-6 via the antenna 106.
　メッセージ受信部１０２は、無線送受信部１０１で受信された無線信号に含まれるメッセージ内容を判断する。例えば、メッセージ受信部１０２は、無線信号に含まれるメッセージ内容が有効信号情報リストの場合、有効信号情報リストを信号検出部１０３に出力する。また、メッセージ受信部１０２は、無線信号に含まれるメッセージ内容が信号波形データの場合、信号波形データを上位装置３００に送信する。 The message receiving unit 102 determines the message content included in the wireless signal received by the wireless transmitting / receiving unit 101. For example, when the message content included in the radio signal is a valid signal information list, the message receiving unit 102 outputs the valid signal information list to the signal detecting unit 103. In addition, when the message content included in the radio signal is signal waveform data, the message receiving unit 102 transmits the signal waveform data to the higher-level device 300.
　信号検出部１０３は、メッセージ受信部１０２から取得したサンプリング装置２００－１～２００－６からの有効信号情報リストを用いて、規定された信号強度を有する固定長信号を検出する。固定長信号は第１の信号である。信号検出部１０３の詳細な動作については後述する。 The signal detection unit 103 uses the effective signal information list from the sampling devices 200-1 to 200-6 acquired from the message reception unit 102 to detect a fixed length signal having a prescribed signal strength. The fixed length signal is the first signal. Detailed operation of the signal detection unit 103 will be described later.
　組み合わせ検出部１０４は、有効信号情報リストの組み合わせから、固定長信号のうち同一周波数帯の通信で使用されている信号である第２の信号の組み合わせを検出する。組み合わせ検出部１０４は、第２の信号の受信状態が含まれる有効信号情報リストの送信元のサンプリング装置２００の組み合わせおよび第２の信号の受信期間を示すコネクション情報を作成する。コネクション情報には、サンプリング装置２００の組み合わせを示す各サンプリング装置２００の識別子の情報が含まれる。第２の信号の受信期間については、各サンプリング装置２００が第２の信号を受信している期間を含んでいればよく、実際の受信期間よりも大きめの範囲にしてもよい。複数のコネクション情報をまとめたものをコネクションリストとする。組み合わせ検出部１０４の詳細な動作については後述する。 The combination detection unit 104 detects a combination of second signals, which are signals used in communication in the same frequency band among fixed-length signals, from the combination of the valid signal information list. The combination detection unit 104 creates connection information indicating the combination of the sampling device 200 that is the transmission source of the effective signal information list including the reception state of the second signal and the reception period of the second signal. The connection information includes identifier information of each sampling device 200 indicating the combination of the sampling devices 200. The reception period of the second signal only needs to include the period in which each sampling apparatus 200 receives the second signal, and may be in a range larger than the actual reception period. A connection list is a collection of multiple connection information. Detailed operation of the combination detection unit 104 will be described later.
　メッセージ送信部１０５は、生成したメッセージをサンプリング装置２００に向けて送信する。具体的に、メッセージ送信部１０５は、サンプリング装置２００に対してサンプリングの開始を指示するトリガ信号を内容とするメッセージを生成し、無線送受信部１０１に出力する。無線送受信部１０１は、トリガ信号をメッセージ内容とする無線信号を生成し、全てのサンプリング装置２００を宛先としてまたはブロードキャストで、アンテナ１０６を介して無線信号を送信する。また、メッセージ送信部１０５は、コネクションリストすなわち各コネクション情報に基づいて、サンプリング装置２００で受信された信号の信号波形データの抽出期間を示す信号抽出メッセージを生成し、無線送受信部１０１に出力する。無線送受信部１０１は、信号抽出メッセージを含む無線信号を生成し、コネクション情報に該当するサンプリング装置２００すなわち信号抽出メッセージに含まれる識別子に該当するサンプリング装置２００に対して、アンテナ１０６を介して無線信号を送信する。 The message transmission unit 105 transmits the generated message to the sampling device 200. Specifically, the message transmission unit 105 generates a message containing a trigger signal that instructs the sampling device 200 to start sampling, and outputs the message to the wireless transmission / reception unit 101. The wireless transmission / reception unit 101 generates a wireless signal whose message content is a trigger signal, and transmits the wireless signal via the antenna 106 with all sampling devices 200 as a destination or broadcast. Further, the message transmission unit 105 generates a signal extraction message indicating the extraction period of the signal waveform data of the signal received by the sampling device 200 based on the connection list, that is, each connection information, and outputs the signal extraction message to the wireless transmission / reception unit 101. The radio transmission / reception unit 101 generates a radio signal including a signal extraction message, and transmits a radio signal via the antenna 106 to the sampling device 200 corresponding to the connection information, that is, the sampling device 200 corresponding to the identifier included in the signal extraction message. Send.
　図３は、実施の形態１にかかる信号検出装置１００のハードウェア構成の一例を示す図である。信号検出装置１００は、プロセッサ１２０、ストレージ１２１、メモリ１２２、および無線送受信器１２３により実現される。具体的に、無線送受信部１０１は無線送受信器１２３である。無線送受信器１２３はアンテナ１０６も含むものとする。 FIG. 3 is a diagram illustrating an example of a hardware configuration of the signal detection apparatus 100 according to the first embodiment. The signal detection apparatus 100 is realized by a processor 120, a storage 121, a memory 122, and a wireless transceiver 123. Specifically, the wireless transceiver 101 is a wireless transceiver 123. The wireless transceiver 123 is assumed to also include the antenna 106.
　メッセージ受信部１０２、信号検出部１０３、組み合わせ検出部１０４、およびメッセージ送信部１０５は、ソフトウェア、ファームウェア、またはソフトウェアとファームウェアの組み合わせにより実現される。ソフトウェアおよびファームウェアはプログラムとして記述され、メモリ１２２に記憶される。メモリ１２２が記憶するプログラムをプロセッサ１２０が読み出して実行することにより各機能が実現される。プログラムが実行される中で情報を記録する際には、メモリ１２２を用いてデータを保持してもよいし、ストレージ１２１を用いてデータを保持してもよい。このように、メッセージ受信部１０２、信号検出部１０３、組み合わせ検出部１０４、およびメッセージ送信部１０５は、プロセッサ１２０、ストレージ１２１、およびメモリ１２２を含む処理回路により実現される。 The message reception unit 102, the signal detection unit 103, the combination detection unit 104, and the message transmission unit 105 are realized by software, firmware, or a combination of software and firmware. Software and firmware are described as programs and stored in the memory 122. Each function is realized by the processor 120 reading and executing the program stored in the memory 122. When recording information while the program is being executed, the memory 122 may be used to hold data, or the storage 121 may be used to hold data. As described above, the message reception unit 102, the signal detection unit 103, the combination detection unit 104, and the message transmission unit 105 are realized by a processing circuit including the processor 120, the storage 121, and the memory 122.
　図３において、プロセッサ１２０は、例えば、ＣＰＵ（Central　Processing　Unit、中央処理装置、処理装置、演算装置、マイクロプロセッサ、マイクロコンピュータ、ＤＳＰ（Digital　Signal　Processor）ともいう）である。ストレージ１２１およびメモリ１２２は、例えば、ＲＡＭ（Random　Access　Memory）、ＲＯＭ（Read　Only　Memory）、フラッシュメモリ、ＥＰＲＯＭ（Erasable　Programmable　Read　Only　Memory）、ＥＥＰＲＯＭ（登録商標）（Electrically　Erasable　Programmable　Read　Only　Memory）などの、不揮発性または揮発性の半導体メモリ、磁気ディスク、フレキシブルディスク、光ディスク、コンパクトディスク、ミニディスク、ＤＶＤ（Digital　Versatile　Disk）などが該当する。 3, the processor 120 is, for example, a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, DSP (Digital Signal Processor)). The storage 121 and the memory 122 include, for example, RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory), etc. Non-volatile or volatile semiconductor memory, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disk), and the like.
　プロセッサ１２０、ストレージ１２１、およびメモリ１２２からなる処理回路については、専用のハードウェアで実現してもよい。専用のハードウェアで実現する場合、処理回路は、例えば、単一回路、複合回路、プログラム化したプロセッサ、並列プログラム化したプロセッサ、ＡＳＩＣ（Application　Specific　Integrated　Circuit）、ＦＰＧＡ（Field　Programmable　Gate　Array）、またはこれらを組み合わせたものである。 The processing circuit including the processor 120, the storage 121, and the memory 122 may be realized by dedicated hardware. When implemented with dedicated hardware, the processing circuit can be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or It is a combination of these.
　つぎに、サンプリング装置２００の構成について説明する。サンプリング装置２００－１～２００－６は同様の構成のため、ここでは、サンプリング装置２００－１を例にして説明する。図４は、実施の形態１にかかるサンプリング装置２００－１の構成例を示すブロック図である。サンプリング装置２００－１は、無線送受信部２０１と、メッセージ受信部２０２と、無線受信部２０３と、信号波形記録部２０４と、スペクトログラム作成部２０５と、有効信号判定部２０６と、メッセージ送信部２０７と、信号波形抽出部２０８と、アンテナ２０９，２１０と、を備える。なお、アンテナ２０９，２１０については、別々のアンテナであってもよいし、共通の１つのアンテナであってもよい。 Next, the configuration of the sampling apparatus 200 will be described. Since the sampling devices 200-1 to 200-6 have the same configuration, the sampling device 200-1 will be described as an example here. FIG. 4 is a block diagram of a configuration example of the sampling apparatus 200-1 according to the first embodiment. Sampling apparatus 200-1 includes radio transmission / reception unit 201, message reception unit 202, radio reception unit 203, signal waveform recording unit 204, spectrogram creation unit 205, valid signal determination unit 206, message transmission unit 207, The signal waveform extracting unit 208 and the antennas 209 and 210 are provided. The antennas 209 and 210 may be separate antennas or a common antenna.
　無線送受信部２０１は、アンテナ２０９を介して、信号検出装置１００および周囲の他のサンプリング装置２００との間でメッセージを含む無線信号を送受信する。 The wireless transmission / reception unit 201 transmits / receives a wireless signal including a message between the signal detection device 100 and other surrounding sampling devices 200 via the antenna 209.
　メッセージ受信部２０２は、無線送受信部２０１で受信された無線信号に含まれるメッセージ内容を判断する。例えば、メッセージ受信部２０２は、無線信号に含まれるメッセージ内容がトリガ信号の場合、トリガ信号を無線受信部２０３に出力する。また、メッセージ受信部２０２は、無線信号に含まれるメッセージ内容がコネクションリストの場合、コネクションリストを信号波形抽出部２０８に出力する。 The message reception unit 202 determines the message content included in the wireless signal received by the wireless transmission / reception unit 201. For example, when the message content included in the wireless signal is a trigger signal, the message receiving unit 202 outputs the trigger signal to the wireless receiving unit 203. Further, when the message content included in the radio signal is a connection list, the message receiving unit 202 outputs the connection list to the signal waveform extracting unit 208.
　無線受信部２０３は、信号検出装置１００からの指示、すなわちトリガ信号に基づいてサンプリングを開始する。具体的に、無線受信部２０３は、アンテナ２１０を介して、自装置の周辺で送受信されている信号を受信し、信号を無線周波数から中間周波数に変換し、さらにアナログ信号からデジタル信号に変換する処理などを行って、受信した信号の波形のデジタルデータである信号波形データを信号波形記録部２０４に記憶させる。無線受信部２０３は、例えば、自装置の周辺で送受信されている不法な無線信号を受信する。無線送受信部２０１が特定の無線信号を送受信するのと異なり、無線受信部２０３は、不特定の無線信号を受信する。 The wireless reception unit 203 starts sampling based on an instruction from the signal detection device 100, that is, a trigger signal. Specifically, the wireless reception unit 203 receives a signal transmitted / received around its own device via the antenna 210, converts the signal from a radio frequency to an intermediate frequency, and further converts an analog signal to a digital signal. Processing is performed, and signal waveform data that is digital data of the waveform of the received signal is stored in the signal waveform recording unit 204. For example, the wireless reception unit 203 receives an illegal wireless signal transmitted / received around the own device. Unlike the wireless transmission / reception unit 201 transmitting / receiving a specific wireless signal, the wireless reception unit 203 receives an unspecified wireless signal.
　信号波形記録部２０４は、無線受信部２０３でのサンプリングによって受信された信号の信号波形データを記憶する。 The signal waveform recording unit 204 stores signal waveform data of a signal received by sampling in the wireless reception unit 203.
　スペクトログラム作成部２０５は、信号波形記録部２０４に記憶されている信号波形データを用いて、時間方向および周波数方向にスペクトラム強度をマッピングしたスペクトログラムを作成する。 The spectrogram creating unit 205 creates a spectrogram in which the spectrum intensity is mapped in the time direction and the frequency direction using the signal waveform data stored in the signal waveform recording unit 204.
　有効信号判定部２０６は、スペクトログラム作成部２０５で作成されたスペクトログラムからノイズなどの信号成分を除去し、通信で使用されている信号の候補となる有効信号を検出する。有効信号判定部２０６は、検出した有効信号について、有効周波数帯域、受信開始時刻、受信持続時間、受信終了時刻、および平均受信電力などを算出し、これらの情報を含む有効信号情報リストを作成する。有効信号判定部２０６の詳細な動作については後述する。 The valid signal determination unit 206 removes signal components such as noise from the spectrogram created by the spectrogram creation unit 205 and detects a valid signal that is a candidate signal used in communication. The effective signal determination unit 206 calculates an effective frequency band, a reception start time, a reception duration, a reception end time, an average reception power, and the like for the detected effective signal, and creates an effective signal information list including these pieces of information. . Detailed operation of the valid signal determination unit 206 will be described later.
　信号波形抽出部２０８は、信号検出装置１００からの信号抽出メッセージによって指示された抽出期間の信号波形データを信号波形記録部２０４から抽出する。 The signal waveform extraction unit 208 extracts the signal waveform data of the extraction period designated by the signal extraction message from the signal detection device 100 from the signal waveform recording unit 204.
　メッセージ送信部２０７は、生成したメッセージを信号検出装置１００に向けて送信する。具体的に、メッセージ送信部２０７は、有効信号判定部２０６で作成された有効信号情報リスト、または信号波形抽出部２０８で抽出された信号波形データを内容とするメッセージを生成し、無線送受信部２０１に出力する。無線送受信部２０１は、有効信号情報リストまたは信号波形データをメッセージ内容とする無線信号を生成し、信号検出装置１００に対して、アンテナ２０９を介して無線信号を送信する。 The message transmission unit 207 transmits the generated message to the signal detection device 100. Specifically, the message transmission unit 207 generates a message containing the valid signal information list created by the valid signal determination unit 206 or the signal waveform data extracted by the signal waveform extraction unit 208, and the wireless transmission / reception unit 201. Output to. The wireless transmission / reception unit 201 generates a wireless signal having a valid signal information list or signal waveform data as a message content, and transmits the wireless signal to the signal detection apparatus 100 via the antenna 209.
　図５は、実施の形態１にかかるサンプリング装置２００－１のハードウェア構成の一例を示す図である。サンプリング装置２００－１は、プロセッサ２２０、ストレージ２２１、メモリ２２２、Ａ／Ｄコンバータ２２３、無線受信器２２４、および無線送受信器２２５により実現される。具体的に、無線送受信部２０１は無線送受信器２２５である。無線送受信器２２５はアンテナ２０９も含むものとする。また、無線受信部２０３はＡ／Ｄコンバータ２２３および無線受信器２２４である。無線受信器２２４はアンテナ２１０も含むものとする。信号波形記録部２０４はストレージ２２１またはメモリ２２２である。 FIG. 5 is a diagram illustrating an example of a hardware configuration of the sampling apparatus 200-1 according to the first embodiment. The sampling device 200-1 is realized by a processor 220, a storage 221, a memory 222, an A / D converter 223, a wireless receiver 224, and a wireless transmitter / receiver 225. Specifically, the wireless transceiver 201 is a wireless transceiver 225. The wireless transceiver 225 also includes an antenna 209. The wireless reception unit 203 is an A / D converter 223 and a wireless receiver 224. The wireless receiver 224 also includes the antenna 210. The signal waveform recording unit 204 is a storage 221 or a memory 222.
　メッセージ受信部２０２、スペクトログラム作成部２０５、有効信号判定部２０６、メッセージ送信部２０７、および信号波形抽出部２０８は、ソフトウェア、ファームウェア、またはソフトウェアとファームウェアの組み合わせにより実現される。ソフトウェアおよびファームウェアはプログラムとして記述され、メモリ２２２に記憶される。メモリ２２２が記憶するプログラムをプロセッサ２２０が読み出して実行することにより各機能が実現される。各機能のプログラムの実行において必要なデータの保持および信号波形記録部２０４が情報を記録する際には、メモリ２２２あるいはストレージ２２１を用いて行われる。このように、メッセージ受信部２０２、スペクトログラム作成部２０５、有効信号判定部２０６、メッセージ送信部２０７、および信号波形抽出部２０８は、プロセッサ２２０、ストレージ２２１、およびメモリ２２２を含む処理回路により実現される。 The message reception unit 202, spectrogram creation unit 205, valid signal determination unit 206, message transmission unit 207, and signal waveform extraction unit 208 are realized by software, firmware, or a combination of software and firmware. Software and firmware are described as programs and stored in the memory 222. Each function is realized by the processor 220 reading and executing the program stored in the memory 222. Data holding necessary for execution of each function program and recording of information by the signal waveform recording unit 204 are performed using the memory 222 or the storage 221. As described above, the message reception unit 202, spectrogram creation unit 205, valid signal determination unit 206, message transmission unit 207, and signal waveform extraction unit 208 are realized by a processing circuit including the processor 220, the storage 221, and the memory 222. .
　図５において、プロセッサ２２０は、例えば、ＣＰＵである。ストレージ２２１およびメモリ２２２は、例えば、ＲＡＭ、ＲＯＭ、フラッシュメモリ、ＥＰＲＯＭ、ＥＥＰＲＯＭなどの、不揮発性または揮発性の半導体メモリ、磁気ディスク、フレキシブルディスク、光ディスク、コンパクトディスク、ミニディスク、ＤＶＤなどが該当する。 In FIG. 5, the processor 220 is, for example, a CPU. The storage 221 and the memory 222 correspond to, for example, a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, and an EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD. .
　プロセッサ２２０、ストレージ２２１、およびメモリ２２２からなる処理回路については、専用のハードウェアで実現してもよい。専用のハードウェアで実現する場合、処理回路は、例えば、単一回路、複合回路、プログラム化したプロセッサ、並列プログラム化したプロセッサ、ＡＳＩＣ、ＦＰＧＡ、またはこれらを組み合わせたものである。 The processing circuit including the processor 220, the storage 221, and the memory 222 may be realized by dedicated hardware. When realized by dedicated hardware, the processing circuit is, for example, a single circuit, a composite circuit, a programmed processor, a processor programmed in parallel, an ASIC, an FPGA, or a combination thereof.
　つづいて、実施の形態１にかかる信号検出システム９００の動作について説明する。信号検出装置１００およびサンプリング装置２００は、通信相手を識別する際、前述のように各装置に割り当てられた識別子を用いる。識別子としては、例えば、データリンク層、ネットワーク層、またはその他の層で用いられる公知のアドレスを用いることができる。 Subsequently, the operation of the signal detection system 900 according to the first exemplary embodiment will be described. The signal detection device 100 and the sampling device 200 use the identifier assigned to each device as described above when identifying the communication partner. As the identifier, for example, a known address used in the data link layer, the network layer, or other layers can be used.
　まず、信号検出装置１００の動作について説明する。図６は、実施の形態１にかかる信号検出装置１００の動作の例を示すフローチャートである。図６に示すフローチャートは一例であり、必要であれば各処理の順序を入れ替えてもよいし、各処理を並列化してもよい。信号検出装置１００に設定される値および閾値については、上位装置３００から設定してもよいし、予めユーザが信号検出装置１００に設定してもよい。 First, the operation of the signal detection apparatus 100 will be described. FIG. 6 is a flowchart of an example of the operation of the signal detection apparatus 100 according to the first embodiment. The flowchart shown in FIG. 6 is an example, and if necessary, the order of the processes may be changed, or the processes may be parallelized. About the value and threshold value which are set to the signal detection apparatus 100, you may set from the high-order apparatus 300, and a user may set to the signal detection apparatus 100 previously.
　信号検出装置１００において、メッセージ送信部１０５は、サンプリングの開始を指示するためのトリガ信号を生成する。トリガ信号には、サンプリング開始時刻、およびサンプリング時間またはサンプリング終了時刻など、サンプリング装置２００においてサンプリング、すなわち信号を受信する期間の情報が含まれる。メッセージ送信部１０５は、生成したトリガ信号を内容とするメッセージをサンプリング装置２００に向けて送信する（ステップＳ１）。具体的に、メッセージ送信部１０５は、生成したトリガ信号を内容とするメッセージを無線送受信部１０１に出力する。無線送受信部１０１は、トリガ信号をメッセージ内容とする無線信号を生成し、全てのサンプリング装置２００を宛先としてまたはブロードキャストで、アンテナ１０６を介して無線信号を送信する。 In the signal detection apparatus 100, the message transmission unit 105 generates a trigger signal for instructing the start of sampling. The trigger signal includes information on a period during which sampling is performed, that is, a signal is received by the sampling apparatus 200, such as a sampling start time and a sampling time or a sampling end time. The message transmission unit 105 transmits a message containing the generated trigger signal to the sampling device 200 (step S1). Specifically, the message transmission unit 105 outputs a message containing the generated trigger signal to the wireless transmission / reception unit 101. The wireless transmission / reception unit 101 generates a wireless signal whose message content is a trigger signal, and transmits the wireless signal via the antenna 106 with all sampling devices 200 as a destination or broadcast.
　無線送受信部１０１は、アンテナ１０６を介して、サンプリング装置２００から無線信号を受信すると、無線信号に含まれるメッセージをメッセージ受信部１０２に受け渡す。メッセージ受信部１０２は、メッセージに有効信号情報リストが含まれている場合、有効信号情報リストを取得して保持する（ステップＳ２）。 When the wireless transmission / reception unit 101 receives a wireless signal from the sampling device 200 via the antenna 106, the wireless transmission / reception unit 101 passes a message included in the wireless signal to the message reception unit 102. When the message includes a valid signal information list, the message receiving unit 102 acquires and holds the valid signal information list (step S2).
　有効信号情報リストを取得していないサンプリング装置２００がある場合（ステップＳ３：Ｎｏ）、無線送受信部１０１およびメッセージ受信部１０２は、ステップＳ２の処理を繰り返し実施する。全てのサンプリング装置２００から有効信号情報リストを取得した場合（ステップＳ３：Ｙｅｓ）、メッセージ受信部１０２は、有効信号情報リストを信号検出部１０３に出力する。なお、メッセージ受信部１０２は、全てのサンプリング装置２００の有効信号情報リストが揃ってからまとめて信号検出部１０３に出力してもよいし、個々のサンプリング装置２００から有効信号情報リストを取得する都度、信号検出部１０３に出力してもよい。 When there is a sampling device 200 that has not acquired the valid signal information list (step S3: No), the wireless transmission / reception unit 101 and the message reception unit 102 repeatedly perform the process of step S2. When the valid signal information list is acquired from all the sampling devices 200 (step S3: Yes), the message receiving unit 102 outputs the valid signal information list to the signal detecting unit 103. Note that the message receiving unit 102 may collect and output the effective signal information lists of all the sampling devices 200 to the signal detecting unit 103, or each time the effective signal information list is acquired from each sampling device 200. The signal may be output to the signal detection unit 103.
　信号検出部１０３は、メッセージ受信部１０２から取得した全てのサンプリング装置２００の有効信号情報リストを用いて固定長信号を検出する（ステップＳ４）。例えば、信号検出部１０３は、有効信号情報リストに含まれる全ての信号の信号長でヒストグラムを作成し、設定された閾値を超える割合の信号を固定長信号として検出する。または、信号検出部１０３は、有効信号情報リストに含まれる信号について、有効信号情報リストに含まれる受信周波数帯域などの１つ以上の情報を用いて特徴ベクトルとして信号を分類し、分類されたクラスタ内の分散が一定以内の値を持つものを固定長信号として検出する。信号検出部１０３において固定長信号を検出するこれらの方法は一例であり、これらの方法に限定されるものではない。信号検出部１０３は、取得した有効信号情報リストとともに、検出した固定長信号の情報を組み合わせ検出部１０４に出力する。 The signal detection unit 103 detects a fixed-length signal using the valid signal information list of all the sampling devices 200 acquired from the message reception unit 102 (step S4). For example, the signal detection unit 103 creates a histogram with the signal lengths of all signals included in the valid signal information list, and detects signals having a ratio exceeding a set threshold as fixed-length signals. Alternatively, the signal detection unit 103 classifies signals as feature vectors using one or more pieces of information such as reception frequency bands included in the effective signal information list for the signals included in the effective signal information list, and the classified clusters A signal with a variance within a certain value is detected as a fixed-length signal. These methods of detecting the fixed length signal in the signal detection unit 103 are examples, and are not limited to these methods. The signal detection unit 103 outputs the detected fixed-length signal information to the combination detection unit 104 together with the acquired valid signal information list.
　組み合わせ検出部１０４は、信号検出部１０３から取得した全ての有効信号情報リストから２つの有効信号情報リストを抽出し、抽出した２つの有効信号情報リストの組み合わせから、固定長信号のうち同一周波数帯の通信で使用されている信号の組み合わせを検出できたか否かを確認する（ステップＳ５）。固定長信号すなわち第１の信号のうち、同一周波数帯の通信で使用されている信号を第２の信号とする。 The combination detection unit 104 extracts two effective signal information lists from all the effective signal information lists acquired from the signal detection unit 103, and uses the same frequency band of fixed-length signals from the combination of the two extracted effective signal information lists. It is confirmed whether or not a combination of signals used in the communication is detected (step S5). Of the fixed length signal, that is, the first signal, a signal used in communication in the same frequency band is defined as a second signal.
　組み合わせ検出部１０４は、例えば、ある２台のサンプリング装置２００の有効信号情報リストの組み合わせにおいて、各有効信号情報リストに記載の有効周波数帯域が同一の帯域を含み帯域幅が同等の場合、有効周波数帯域が一致したと判定し、同一周波数帯の通信で使用されている信号の組み合わせを検出できたと判定する（ステップＳ５：Ｙｅｓ）。帯域幅が同等とは、例えば、一方の有効信号情報リストに記載の有効周波数帯域の帯域幅に対して、他方の有効信号情報リストに記載の有効周波数帯域の帯域幅が規定された誤差の範囲内になる場合である。組み合わせ検出部１０４は、例えば、２台のサンプリング装置２００の有効信号情報リストから、固定長信号が等密度に配置されており、かつ、サンプリング装置２００が交互に固定長信号を受信している領域をコネクションとして検出する。すなわち、組み合わせ検出部１０４は、有効信号情報リストの組み合わせにおいて、２台のサンプリング装置２００での固定長信号の受信頻度および受信順に基づいて、同一周波数帯の通信で使用されている信号の組み合わせを検出したと判定する。 For example, in the combination of the effective signal information lists of two sampling devices 200, the combination detection unit 104 includes the same effective frequency band described in each effective signal information list, and the effective frequency band is the same. It is determined that the bands match, and it is determined that a combination of signals used in communication in the same frequency band has been detected (step S5: Yes). The bandwidth is equivalent, for example, the range of error in which the bandwidth of the effective frequency band described in the other effective signal information list is defined with respect to the bandwidth of the effective frequency band described in one of the effective signal information lists This is the case. For example, the combination detection unit 104 is an area in which fixed-length signals are arranged at equal density from the valid signal information lists of two sampling devices 200 and the sampling devices 200 alternately receive fixed-length signals. Is detected as a connection. That is, in the combination of the valid signal information lists, the combination detection unit 104 selects a combination of signals used in communication in the same frequency band based on the reception frequency and reception order of the fixed-length signals in the two sampling devices 200. It is determined that it has been detected.
　組み合わせ検出部１０４は、この２台のサンプリング装置２００の識別子の組み合わせを、組み合わせリストに追加する。組み合わせ検出部１０４は、組み合わせリストに追加された２台のサンプリング装置２００に紐づけられた有効信号情報リストに基づいて、１回の通信では呼び出しと応答の関係が存在すると仮定して１回の通信のやり取りをコネクションとして検出する。具体的に、２台のサンプリング装置２００のうち一方のサンプリング装置２００の周辺に通信装置Ａがあり、他方のサンプリング装置２００の周辺に通信装置Ｂがあり、一方のサンプリング装置２００が通信装置Ａから通信装置Ｂに送信された無線信号を受信し、他方のサンプリング装置２００が通信装置Ｂから通信装置Ａに送信された無線信号を受信した場合を想定したものである。 The combination detection unit 104 adds the identifier combinations of the two sampling devices 200 to the combination list. Based on the valid signal information list associated with the two sampling devices 200 added to the combination list, the combination detection unit 104 assumes that there is a call-response relationship in one communication. Communication exchange is detected as a connection. Specifically, the communication device A is around one sampling device 200 of the two sampling devices 200, the communication device B is around the other sampling device 200, and one sampling device 200 is connected to the communication device A from the communication device A. It is assumed that the wireless signal transmitted to the communication device B is received and the other sampling device 200 receives the wireless signal transmitted from the communication device B to the communication device A.
　組み合わせ検出部１０４は、検出したコネクションについて、コネクション内に同数の固定長信号が存在すること、また１コネクションは時間的に密集していることを利用してコネクション情報を作成する（ステップＳ６）。コネクション情報には、第２の信号の受信状態が含まれる有効信号情報リストの送信元のサンプリング装置２００の組み合わせの情報、および第２の信号の受信期間の情報が含まれる。サンプリング装置２００の組み合わせの情報は、各サンプリング装置２００の識別子によって示される。第２の信号の受信期間の情報は、受信開始時刻および受信持続時間であってもよいし、受信開始時刻および受信終了時刻であってもよい。 The combination detection unit 104 creates connection information for the detected connection by utilizing the fact that the same number of fixed-length signals exist in the connection and that one connection is dense in time (step S6). The connection information includes information on the combination of the sampling devices 200 as the transmission source in the effective signal information list including the reception state of the second signal, and information on the reception period of the second signal. Information on the combination of the sampling devices 200 is indicated by an identifier of each sampling device 200. The information on the reception period of the second signal may be a reception start time and a reception duration, or a reception start time and a reception end time.
　組み合わせ検出部１０４は、コネクション情報をまとめたものをコネクションリストとし、作成したコネクション情報をコネクションリストに追加する。図７は、実施の形態１にかかる信号検出装置１００の組み合わせ検出部１０４が作成したコネクションリストの例を示す図である。コネクションリストには、サンプリング装置、受信開始時刻、および受信終了時刻の項目があり、１行が１つのコネクション情報である。説明の便宜上、サンプリング装置の項目には、図１で示した２００－１，２００－２などのサンプリング装置２００の符号を用いているが、実際にはサンプリング装置２００の識別子を用いる。なお、前述のように、受信終了時刻の項目については受信持続時間にしてもよい。 The combination detection unit 104 sets the connection information as a connection list, and adds the created connection information to the connection list. FIG. 7 is a diagram illustrating an example of a connection list created by the combination detection unit 104 of the signal detection apparatus 100 according to the first embodiment. The connection list includes items of a sampling device, a reception start time, and a reception end time, and one line is one connection information. For the sake of convenience of explanation, the items of the sampling device use the codes of the sampling devices 200 such as 200-1 and 200-2 shown in FIG. 1, but actually use the identifier of the sampling device 200. As described above, the reception end time item may be the reception duration.
　組み合わせ検出部１０４は、コネクションリストに追加された全てのコネクション情報について、各有効信号情報リストに含まれる受信開始時刻および受信持続時間、または受信開始時刻および受信終了時刻に基づいて、同一周波数帯の同一時刻に信号が存在するか否かを確認する。組み合わせ検出部１０４は、同一周波数帯の同一時刻に信号が存在するコネクション情報について、呼び出しと応答の関係が存在しない、すなわち通信を行っていないと判定し、コネクションリストから削除する。なお、組み合わせ検出部１０４は、同一周波数帯の同一時刻に信号が存在するコネクション情報について、例えば、平均受信電力が最も大きい信号以外の信号を該当する有効信号情報リストから削除し、コネクションリストから削除しないようにしてもよい。 The combination detection unit 104, for all the connection information added to the connection list, based on the reception start time and the reception duration included in each valid signal information list, or the reception start time and the reception end time, Check whether a signal exists at the same time. The combination detection unit 104 determines that there is no relationship between call and response for connection information in which a signal exists at the same time in the same frequency band, that is, does not perform communication, and deletes it from the connection list. Note that the combination detection unit 104 deletes, for example, a signal other than the signal having the highest average received power from the corresponding valid signal information list and deletes it from the connection list for connection information in which signals exist at the same time in the same frequency band. You may make it not.
　組み合わせ検出部１０４は、コネクションリストの各コネクション情報に含まれる、有効信号情報リストの組み合わせに該当するサンプリング装置２００の識別子、第２の信号の受信開始時刻および受信持続時間、または受信開始時刻および受信終了時刻の情報をメッセージ送信部１０５に通知する。 The combination detection unit 104 includes the identifier of the sampling device 200 corresponding to the combination of the valid signal information list, the reception start time and the reception duration of the second signal, or the reception start time and the reception included in each connection information of the connection list. Information on the end time is notified to the message transmission unit 105.
　組み合わせ検出部１０４は、同一周波数帯の通信で使用されている信号の組み合わせを検出できなかった場合（ステップＳ５：Ｎｏ）、トリガ信号の再送をメッセージ送信部１０５に通知する。信号検出装置１００では、ステップＳ１に戻って前述の処理を繰り返し実施する。なお、組み合わせ検出部１０４は、同一周波数帯の通信で使用されている信号の組み合わせを検出できたが（ステップＳ５：Ｙｅｓ）、コネクションリストからコネクション情報を除外する処理を行った結果、コネクションリストにコネクション情報が残らなかった場合、ステップＳ５：Ｎｏの場合と同様、トリガ信号の再送をメッセージ送信部１０５に通知してもよい。 The combination detection unit 104 notifies the message transmission unit 105 of retransmission of the trigger signal when the combination of signals used in communication in the same frequency band cannot be detected (step S5: No). In the signal detection apparatus 100, the process returns to step S1 and the above-described processing is repeatedly performed. The combination detection unit 104 can detect a combination of signals used in communication in the same frequency band (step S5: Yes), but the connection list is excluded from the connection list as a result of the process of removing the connection information from the connection list. When no connection information remains, the message transmission unit 105 may be notified of retransmission of the trigger signal, as in step S5: No.
　メッセージ送信部１０５は、組み合わせ検出部１０４から取得した情報に基づいて、コネクションリストに含まれる信号の信号波形データをサンプリング装置２００から収集するための信号抽出メッセージを生成する。信号抽出メッセージには、第２の信号の受信開始時刻および受信持続時間、または受信開始時刻および受信終了時刻の情報が含まれる。また、信号抽出メッセージには、有効信号情報リストの組み合わせに該当するサンプリング装置２００の識別子が含まれる。メッセージ送信部１０５は、生成した信号抽出メッセージをサンプリング装置２００に向けて送信する（ステップＳ７）。 The message transmission unit 105 generates a signal extraction message for collecting signal waveform data of signals included in the connection list from the sampling device 200 based on the information acquired from the combination detection unit 104. The signal extraction message includes information about the reception start time and reception duration of the second signal, or the reception start time and reception end time. Further, the signal extraction message includes an identifier of the sampling device 200 corresponding to the combination of the valid signal information list. The message transmission unit 105 transmits the generated signal extraction message to the sampling device 200 (step S7).
　具体的に、メッセージ送信部１０５は、生成した信号抽出メッセージを無線送受信部１０１に出力する。無線送受信部１０１は、信号抽出メッセージを含む無線信号を生成し、信号抽出メッセージの対象となるサンプリング装置２００を宛先としてまたはブロードキャストで、アンテナ１０６を介して無線信号を送信する。なお、信号検出装置１００から信号抽出メッセージを含む無線信号をブロードキャストで送信した場合、信号抽出メッセージの対象外のサンプリング装置２００は、受信した信号抽出メッセージを含む無線信号を破棄する。ここで、信号検出装置１００は、信号抽出メッセージの対象とならないサンプリング装置２００、すなわち信号波形データを送信する必要のないサンプリング装置２００に対して、信号波形データの送信の必要がないことを示す信号抽出メッセージを送信してもよい。これにより、サンプリング装置２００は、有効信号情報リストを送信後、信号検出装置１００からの応答すなわち信号抽出メッセージを待ち続ける事態を回避することができる。 Specifically, the message transmission unit 105 outputs the generated signal extraction message to the wireless transmission / reception unit 101. The wireless transmission / reception unit 101 generates a wireless signal including a signal extraction message, and transmits the wireless signal via the antenna 106 with the sampling device 200 that is the target of the signal extraction message as a destination or broadcast. When a radio signal including a signal extraction message is broadcast from the signal detection device 100, the sampling device 200 that is not subject to the signal extraction message discards the radio signal including the received signal extraction message. Here, the signal detection device 100 indicates that there is no need to transmit the signal waveform data to the sampling device 200 that is not the target of the signal extraction message, that is, the sampling device 200 that does not need to transmit the signal waveform data. An extraction message may be sent. Thereby, the sampling apparatus 200 can avoid the situation where it waits for the response from the signal detection apparatus 100, that is, the signal extraction message after transmitting the valid signal information list.
　無線送受信部１０１は、アンテナ１０６を介して、サンプリング装置２００から無線信号を受信すると、無線信号に含まれるメッセージをメッセージ受信部１０２に受け渡す。メッセージ受信部１０２は、前述の信号抽出メッセージに対する応答であって、メッセージに含まれている信号波形データを取得すると（ステップＳ８）、取得した信号波形データを上位装置３００に送信する（ステップＳ９）。 When the wireless transmission / reception unit 101 receives a wireless signal from the sampling device 200 via the antenna 106, the wireless transmission / reception unit 101 passes a message included in the wireless signal to the message reception unit 102. When the message receiving unit 102 acquires the signal waveform data included in the message in response to the signal extraction message (step S8), the message receiving unit 102 transmits the acquired signal waveform data to the host device 300 (step S9). .
　つぎに、サンプリング装置２００の動作について説明する。図８は、実施の形態１にかかるサンプリング装置２００の動作の例を示すフローチャートである。図８に示すフローチャートは一例であり、必要であれば各処理の順序を入れ替えてもよいし、各処理を並列化してもよい。サンプリング装置２００に設定される値および閾値については、信号検出装置１００から設定してもよいし、予めユーザがサンプリング装置２００に設定してもよい。 Next, the operation of the sampling apparatus 200 will be described. FIG. 8 is a flowchart illustrating an example of the operation of the sampling apparatus 200 according to the first embodiment. The flowchart shown in FIG. 8 is an example, and if necessary, the order of the processes may be changed, or the processes may be parallelized. The value and threshold value set in the sampling device 200 may be set from the signal detection device 100 or may be set in the sampling device 200 in advance by the user.
　サンプリング装置２００において、無線送受信部２０１は、信号検出装置１００から無線信号を受信すると、無線信号に含まれるメッセージをメッセージ受信部２０２に受け渡す。メッセージ受信部２０２は、メッセージの内容がサンプリングの開始を指示するためのトリガ信号を受信するまで待機する（ステップＳ２１：Ｎｏ）。メッセージ受信部２０２は、トリガ信号を受信した場合（ステップＳ２１：Ｙｅｓ）、トリガ信号に含まれるサンプリング期間の情報にしたがって、無線受信部２０３にサンプリングの開始を指示する。 In the sampling device 200, when the wireless transmission / reception unit 201 receives a wireless signal from the signal detection device 100, the wireless transmission / reception unit 201 passes a message included in the wireless signal to the message reception unit 202. The message receiving unit 202 waits until the content of the message receives a trigger signal for instructing the start of sampling (step S21: No). When receiving the trigger signal (step S21: Yes), the message reception unit 202 instructs the wireless reception unit 203 to start sampling according to the sampling period information included in the trigger signal.
　無線受信部２０３は、メッセージ受信部２０２からの指示にしたがって、トリガ信号で示されるサンプリング期間において、他のサンプリング装置２００と同期して信号のサンプリングを開始する（ステップＳ２２）。 The radio reception unit 203 starts sampling of the signal in synchronization with the other sampling devices 200 in the sampling period indicated by the trigger signal in accordance with the instruction from the message reception unit 202 (step S22).
　サンプリング装置２００同士が同期してサンプリングを行う方法としては、例えば、サンプリング装置２００内または外部に接続されたＧＰＳ（Global　Positioning　System）機器から得られる絶対時刻を、トリガ信号に含まれるサンプリング開始時刻で指定してもよいし、アドホックネットワークのように中継通信を行うシステムの場合には無線通信による時刻同期手法を用いて時刻同期を行い、ネットワーク内で同期した時刻を用いてもよい。また、信号検出装置１００およびサンプリング装置２００が信号検出装置１００を中心としたスター型の系を構成している場合、サンプリング装置２００は、信号検出装置１００からトリガ信号を受信した時刻からサンプリングを開始してもよいし、トリガ信号に含まれるトリガ信号を受信してからサンプリングを開始するまでの相対時刻に基づいてサンプリングを開始してもよい。 As a method for performing sampling in synchronization between the sampling devices 200, for example, an absolute time obtained from a GPS (Global Positioning System) device connected inside or outside the sampling device 200 is used as a sampling start time included in the trigger signal. In the case of a system that performs relay communication such as an ad hoc network, time synchronization may be performed using a time synchronization method using wireless communication, and a time synchronized within the network may be used. In addition, when the signal detection device 100 and the sampling device 200 constitute a star type system centered on the signal detection device 100, the sampling device 200 starts sampling from the time when the trigger signal is received from the signal detection device 100. Alternatively, sampling may be started based on a relative time from when the trigger signal included in the trigger signal is received to when sampling is started.
　無線受信部２０３は、サンプリングを行って得られた信号波形データを、信号波形記録部２０４に記憶させる。 The wireless reception unit 203 stores the signal waveform data obtained by sampling in the signal waveform recording unit 204.
　スペクトログラム作成部２０５は、信号波形記録部２０４から信号波形データを読み出し、信号波形データのスペクトログラムを作成する（ステップＳ２３）。スペクトログラム作成部２０５は、例えば、信号波形データに対して、信号のサンプルをずらして高速フーリエ変換（ＦＦＴ：Fast　Fourier　Transform）を行い、時間方向および周波数方向に対するスペクトル強度をマッピングしたスペクトログラムを作成する。 The spectrogram creation unit 205 reads the signal waveform data from the signal waveform recording unit 204 and creates a spectrogram of the signal waveform data (step S23). For example, the spectrogram creating unit 205 performs fast Fourier transform (FFT) on the signal waveform data by shifting signal samples, and creates a spectrogram in which spectral intensities in the time direction and the frequency direction are mapped.
　有効信号判定部２０６は、スペクトログラム作成部２０５で作成されたスペクトログラムを用いて、ノイズなどの小電力の信号を除去した信号を有効信号として検出する（ステップＳ２４）。有効信号判定部２０６は、小電力の信号を除去する方法として、例えば、信号の全領域における平均電力を算出し、平均電力以上の時間および周波数における信号を有効信号として検出してもよいし、電力が設定された閾値以上の信号を有効信号として検出してもよい。また、有効信号判定部２０６は、信号強度順に信号を並べて、設定された割合、例えば全時間において信号強度が上位１％を占める信号を有効信号としてもよい。また、有効信号判定部２０６は、これらの方法を組み合わせて用いてもよい。 The valid signal determination unit 206 detects a signal from which a low-power signal such as noise has been removed as a valid signal using the spectrogram created by the spectrogram creation unit 205 (step S24). For example, the effective signal determination unit 206 may calculate the average power in the entire region of the signal as a method for removing the low-power signal, and detect a signal at a time and frequency equal to or higher than the average power as an effective signal. You may detect the signal more than the threshold value for which electric power was set as an effective signal. The valid signal determination unit 206 may arrange the signals in the order of signal strength, and may set a set ratio, for example, a signal whose signal strength occupies the top 1% in the entire time as a valid signal. In addition, the valid signal determination unit 206 may use a combination of these methods.
　また、有効信号判定部２０６は、設定された周波数分割値で複数の周波数帯域に分割し、各周波数帯域における信号強度の時間積分を行い、時間積分値が大きい周波数帯域を有効周波数帯域として検出する（ステップＳ２５）。 The effective signal determination unit 206 divides the signal into a plurality of frequency bands using the set frequency division value, performs time integration of the signal intensity in each frequency band, and detects a frequency band having a large time integration value as an effective frequency band. (Step S25).
　また、有効信号判定部２０６は、検出された有効周波数帯域において信号が存在する区間を有効信号時間として検出する（ステップＳ２６）。有効信号判定部２０６は、信号が存在する区間を検出する方法として、設定された時間幅で区切ってステップＳ２４で検出した有効信号が一定数存在する区間を有効信号時間としてもよいし、ローパスフィルタなどの信号処理により信号強度を平滑化して閾値以上の区間を有効信号時間としてもよい。有効信号時間の範囲については、有効信号の受信開始時刻および有効信号の受信持続時間で特定してもよいし、有効信号の受信開始時刻および有効信号の受信終了時刻で特定してもよい。 Further, the effective signal determination unit 206 detects a section where a signal exists in the detected effective frequency band as an effective signal time (step S26). As a method for detecting a section in which a signal exists, the valid signal determination unit 206 may divide by a set time width and use a section in which a certain number of valid signals detected in step S24 exist as a valid signal time. The signal intensity may be smoothed by signal processing such as the above, and an interval equal to or greater than the threshold may be set as the effective signal time. The range of the effective signal time may be specified by the reception start time of the effective signal and the reception duration of the effective signal, or may be specified by the reception start time of the effective signal and the reception end time of the effective signal.
　有効信号判定部２０６は、検出により得られた有効周波数帯域、受信開始時刻、受信持続時間または受信終了時刻、および平均受信電力を含む有効信号情報リストを作成する（ステップＳ２７）。有効信号判定部２０６は、作成した有効信号情報リストをメッセージ送信部２０７に出力する。 The effective signal determination unit 206 creates an effective signal information list including the effective frequency band obtained by the detection, the reception start time, the reception duration or the reception end time, and the average received power (step S27). The valid signal determination unit 206 outputs the created valid signal information list to the message transmission unit 207.
　メッセージ送信部２０７は、信号波形抽出部２０８から取得した有効信号情報リストを内容とするメッセージを生成し、有効信号情報リストを信号検出装置１００に向けて送信する（ステップＳ２８）。具体的に、メッセージ送信部２０７は、生成したメッセージを無線送受信部２０１に出力する。無線送受信部２０１は、有効信号情報リストをメッセージ内容とする無線信号を生成し、生成した無線信号を、アンテナ１０６を介して信号検出装置１００に送信する。 The message transmission unit 207 generates a message containing the effective signal information list acquired from the signal waveform extraction unit 208, and transmits the effective signal information list to the signal detection device 100 (step S28). Specifically, the message transmission unit 207 outputs the generated message to the wireless transmission / reception unit 201. The wireless transmission / reception unit 201 generates a wireless signal having the effective signal information list as a message content, and transmits the generated wireless signal to the signal detection apparatus 100 via the antenna 106.
　無線送受信部２０１は、信号検出装置１００から無線信号を受信すると、無線信号に含まれるメッセージをメッセージ受信部２０２に受け渡す。メッセージ受信部２０２は、信号抽出メッセージを受信するまで待機する（ステップＳ２９：Ｎｏ）。メッセージ受信部２０２は、信号抽出メッセージを受信した場合（ステップＳ２９：Ｙｅｓ）、信号抽出メッセージを信号波形抽出部２０８に出力する。なお、サンプリング装置２００は、信号検出装置１００から信号波形データの送信の必要がないことを示す信号抽出メッセージを受信した場合、以降の処理を省略する。また、サンプリング装置２００は、有効信号情報リストを送信後、規定された時間が経過しても信号検出装置１００から信号抽出メッセージを受信できなかった場合、信号波形データの送信の必要がないと判断し、以降の処理を省略してもよい。 When the wireless transmission / reception unit 201 receives a wireless signal from the signal detection device 100, the wireless transmission / reception unit 201 passes a message included in the wireless signal to the message reception unit 202. The message receiving unit 202 waits until a signal extraction message is received (step S29: No). When receiving the signal extraction message (step S29: Yes), the message reception unit 202 outputs the signal extraction message to the signal waveform extraction unit 208. Note that when the sampling device 200 receives a signal extraction message indicating that there is no need to transmit signal waveform data from the signal detection device 100, the subsequent processing is omitted. In addition, the sampling apparatus 200 determines that there is no need to transmit the signal waveform data when the signal extraction message cannot be received from the signal detection apparatus 100 even after a specified time has elapsed after transmitting the valid signal information list. However, the subsequent processing may be omitted.
　信号波形抽出部２０８は、メッセージ受信部２０２から取得した信号抽出メッセージに基づいて、信号抽出メッセージで示される抽出期間の信号波形データを、信号波形記録部２０４から抽出する（ステップＳ３０）。信号波形抽出部２０８は、抽出した信号波形データを、メッセージ送信部２０７に出力する。 The signal waveform extraction unit 208 extracts the signal waveform data of the extraction period indicated by the signal extraction message from the signal waveform recording unit 204 based on the signal extraction message acquired from the message reception unit 202 (step S30). The signal waveform extraction unit 208 outputs the extracted signal waveform data to the message transmission unit 207.
　メッセージ送信部２０７は、信号波形抽出部２０８から取得した信号波形データを内容とするメッセージを生成し、信号波形データを信号検出装置１００に向けて送信する（ステップＳ３１）。具体的に、メッセージ送信部２０７は、生成したメッセージを無線送受信部２０１に出力する。無線送受信部２０１は、信号波形データをメッセージ内容とする無線信号を生成し、生成した無線信号を、アンテナ１０６を介して信号検出装置１００に送信する。 The message transmission unit 207 generates a message containing the signal waveform data acquired from the signal waveform extraction unit 208, and transmits the signal waveform data to the signal detection device 100 (step S31). Specifically, the message transmission unit 207 outputs the generated message to the wireless transmission / reception unit 201. The radio transmission / reception unit 201 generates a radio signal having the signal waveform data as a message content, and transmits the generated radio signal to the signal detection apparatus 100 via the antenna 106.
　なお、サンプリング装置２００は、ステップＳ２４で有効信号を検出できなかった場合、以降の処理を終了してもよいし、有効信号を検出できなかったことを信号検出装置１００に通知してもよい。 Note that if the valid signal cannot be detected in step S24, the sampling device 200 may end the subsequent processing, or may notify the signal detection device 100 that the valid signal has not been detected.
　図９は、実施の形態１にかかる信号検出装置１００の動作およびサンプリング装置２００の動作の関係を示すシーケンス図である。図６では信号検出装置１００の動作を説明し、図８ではサンプリング装置２００の動作を説明したが、前述のように各装置の動作は連携している。信号検出システム９００では、図９に示すように、まず、指示ステップとして、信号検出装置１００がステップＳ１の動作を行う。つぎに、有効信号情報リスト送信ステップとして、サンプリング装置２００がステップＳ２１からステップＳ２８までの動作を行う。つぎに、信号抽出メッセージ送信ステップとして、信号検出装置１００がステップＳ２からステップＳ７の動作を行う。つぎに、第１の信号波形データ送信ステップとして、サンプリング装置２００がステップＳ２９からステップＳ３１までの動作を行う。そして、第２の信号波形データ送信ステップとして、信号検出装置１００がステップＳ８からステップＳ９の動作を行う。図９は、信号検出システム９００による信号波形データ収集方法の動作を示すものである。 FIG. 9 is a sequence diagram illustrating the relationship between the operation of the signal detection device 100 and the operation of the sampling device 200 according to the first embodiment. FIG. 6 illustrates the operation of the signal detection apparatus 100, and FIG. 8 illustrates the operation of the sampling apparatus 200. However, as described above, the operation of each apparatus is linked. In the signal detection system 900, as shown in FIG. 9, first, as an instruction step, the signal detection device 100 performs the operation of step S1. Next, as the effective signal information list transmission step, the sampling apparatus 200 performs the operations from step S21 to step S28. Next, as a signal extraction message transmission step, the signal detection device 100 performs the operations from step S2 to step S7. Next, as a first signal waveform data transmission step, the sampling device 200 performs operations from step S29 to step S31. And as a 2nd signal waveform data transmission step, the signal detection apparatus 100 performs operation | movement of step S8 to step S9. FIG. 9 shows the operation of the signal waveform data collection method by the signal detection system 900.
　なお、有効信号情報リストについて、有効周波数帯域、受信開始時刻、受信持続時間または受信終了時刻、および平均受信電力を含むとしていたが、これに限定されるものではなく、有効周波数帯域、受信開始時刻、受信持続時間、受信終了時刻、および平均受信電力のうち少なくとも１つ以上が含まれる形態であってもよい。 The effective signal information list includes the effective frequency band, the reception start time, the reception duration or the reception end time, and the average reception power, but is not limited to this, and the effective frequency band, the reception start time In addition, at least one of reception duration, reception end time, and average reception power may be included.
　以上説明したように、本実施の形態によれば、信号検出装置１００は、まず、サンプリング装置２００から、信号波形データと比較して通信データ量の小さい有効信号情報リストを収集し、各サンプリング装置２００から収集した有効信号情報リストの組み合わせから信号波形データの必要な抽出期間を決定して、各サンプリング装置２００に通知する。各サンプリング装置２００は、抽出期間で指示された信号波形データを信号検出装置１００へ送信することとした。これにより、波形情報が未知の受信信号の場合においても、サンプリング装置２００から信号検出装置１００に対する波形情報、すなわち信号波形データの通信データ量を削減することができる。また、信号検出装置１００から上位装置３００に対する通信データ量を削減することができる。 As described above, according to the present embodiment, the signal detection device 100 first collects the effective signal information list having a smaller communication data amount than the signal waveform data from the sampling device 200, and each sampling device The necessary extraction period of the signal waveform data is determined from the combination of the valid signal information lists collected from 200 and notified to each sampling device 200. Each sampling device 200 transmits the signal waveform data instructed in the extraction period to the signal detection device 100. Thereby, even in the case of a received signal whose waveform information is unknown, it is possible to reduce the amount of communication data from the sampling device 200 to the signal detection device 100, that is, signal waveform data. In addition, the amount of communication data from the signal detection device 100 to the host device 300 can be reduced.
実施の形態２．
　実施の形態１では、信号検出装置１００およびサンプリング装置２００の具体的な動作について説明した。実施の形態２では、これらの装置を用いて不法電波を監視する不法電波監視システムについて説明する。 Embodiment 2. FIG.
In the first embodiment, the specific operations of the signal detection device 100 and the sampling device 200 have been described. In Embodiment 2, an illegal radio wave monitoring system for monitoring illegal radio waves using these devices will be described.
　図１０は、実施の形態２にかかる不法電波監視システム９１０の構成例を示す図である。不法電波監視システム９１０は、信号検出装置１００と、サンプリング装置２００－１～２００－４と、上位装置３００と、を備える。図９ではサンプリング装置２００は４台であるが、一例であり、４台より多くてもよいし少なくてもよい。不法電波監視システム９１０では、上位装置３００は、具体的に不法電波監視装置である。不法電波監視システム９１０において、サンプリング装置２００が設置された周辺には、不法電波源４００－１～４００－４が存在している。不法電波源４００－１～４００－４を区別しない場合、不法電波源４００と称する場合がある。 FIG. 10 is a diagram illustrating a configuration example of the illegal radio wave monitoring system 910 according to the second embodiment. The illegal radio wave monitoring system 910 includes a signal detection device 100, sampling devices 200-1 to 200-4, and a host device 300. Although there are four sampling devices 200 in FIG. 9, this is an example, and the number may be more or less than four. In the illegal radio wave monitoring system 910, the host device 300 is specifically an illegal radio wave monitoring device. In the illegal radio wave monitoring system 910, illegal radio wave sources 400-1 to 400-4 exist in the vicinity where the sampling device 200 is installed. If the illegal radio sources 400-1 to 400-4 are not distinguished, they may be referred to as illegal radio sources 400.
　実施の形態２では、サンプリング装置２００が、不法電波源４００－１，４００－２が不法な通信を行っていることを検出する。サンプリング装置２００は、不法な通信を行っている不法電波源４００－１，４００－２の信号波形データについて、実施の形態１の処理によって必要な部分の信号波形データのみ、信号検出装置１００を介して不法電波監視装置である上位装置３００へ通知する。 In the second embodiment, the sampling device 200 detects that the illegal radio wave sources 400-1 and 400-2 are performing illegal communication. The sampling device 200 passes only the signal waveform data of the necessary part by the processing of the first embodiment with respect to the signal waveform data of the illegal radio wave sources 400-1 and 400-2 performing illegal communication via the signal detection device 100. To the host device 300 which is an illegal radio wave monitoring device.
　信号検出装置１００およびサンプリング装置２００の構成は、実施の形態１と同様の構成である。信号検出装置１００は、コネクション情報を作成し、コネクションリストを作成する。図１１は、実施の形態２にかかる信号検出装置１００がサンプリング装置２００－１～２００－４から取得した有効信号情報リストに基づいて作成したコネクションリストの内容を具体的な信号の配置で表したときの例を示す図である。信号検出装置１００は、固定長信号を検出し、有効信号情報リストの情報に含まれる信号を固定長信号および非固定長信号に分ける。 The configurations of the signal detection device 100 and the sampling device 200 are the same as those in the first embodiment. The signal detection apparatus 100 creates connection information and creates a connection list. FIG. 11 shows the contents of the connection list created by the signal detection device 100 according to the second embodiment based on the valid signal information list acquired from the sampling devices 200-1 to 200-4 in a specific signal arrangement. It is a figure which shows the example of time. The signal detection apparatus 100 detects a fixed-length signal and divides a signal included in the information of the valid signal information list into a fixed-length signal and a non-fixed-length signal.
　信号検出装置１００において、組み合わせ検出部１０４は、有効周波数帯域が等しいものについて、短い時間領域で２台のサンプリング装置２００の双方に信号が存在し、かつ、固定長信号および非固定長信号が一定の比率で存在する領域５０１～５０４をコネクションとして検出する。組み合わせ検出部１０４は、領域５０１～５０４のうち、同時刻に信号が存在している領域５０４は呼び出しと応答の関係が存在しないとして、領域５０４に該当するコネクション情報をコネクションリストから除外する。また、組み合わせ検出部１０４は、２台のサンプリング装置２００が交互に信号を受信していない領域５０３も呼び出しと応答の関係が存在しないとして、領域５０３に該当するコネクション情報をコネクションリストから除外する。 In the signal detection device 100, the combination detection unit 104 has signals in both the two sampling devices 200 in the short time domain for those having the same effective frequency band, and the fixed length signal and the non-fixed length signal are constant. The areas 501 to 504 existing at the ratio are detected as connections. The combination detection unit 104 excludes the connection information corresponding to the area 504 from the connection list, assuming that the area 504 in which a signal exists at the same time among the areas 501 to 504 does not have a call-response relationship. Further, the combination detection unit 104 excludes connection information corresponding to the region 503 from the connection list, assuming that there is no relationship between calling and response in the region 503 in which the two sampling devices 200 do not receive signals alternately.
　組み合わせ検出部１０４では、コネクションリストに領域５０１，５０２に該当するコネクション情報のみが残る。この結果、組み合わせ検出部１０４は、領域５０１，５０２はサンプリング装置２００－１，２００－２が受信した信号情報のみを含むため、不法な通信を行っている不法電波源４００はサンプリング装置２００－１，２００－２に距離的に近い位置にあると判断する。組み合わせ検出部１０４は、サンプリング装置２００－１，２００－２の位置情報が既知の場合、コネクション情報に該当するサンプリング装置２００－１，２００－２の位置情報に基づいて、第２の信号で通信を行っている通信系、すなわち不法電波源４００の位置を推定することができる。信号検出装置１００は、不法電波監視装置である上位装置３００に対して、不法電波源４００の通信系の位置情報を通知することが可能となる。 In the combination detection unit 104, only connection information corresponding to the areas 501 and 502 remains in the connection list. As a result, in the combination detection unit 104, since the regions 501 and 502 include only the signal information received by the sampling devices 200-1 and 200-2, the illegal radio wave source 400 that performs illegal communication is the sampling device 200-1. , 200-2, it is determined that the position is close to the distance. When the position information of the sampling devices 200-1 and 200-2 is known, the combination detection unit 104 communicates with the second signal based on the position information of the sampling devices 200-1 and 200-2 corresponding to the connection information. It is possible to estimate the position of the communication system that is performing, that is, the illegal radio wave source 400. The signal detection device 100 can notify the host device 300 that is an illegal radio wave monitoring device of positional information of the communication system of the illegal radio wave source 400.
　以上説明したように、本実施の形態によれば、信号検出装置１００は、不法な通信を行っている不法電波源４００を検出したサンプリング装置２００の位置情報に基づいて、不法電波源４００の位置を推定することができる。これにより、信号検出装置１００は、実施の形態１と同様、不要電波を除去した信号波形データをサンプリング装置２００から取得して上位装置３００である不法電波監視装置に送信するとともに、推定した不法電波源４００の位置情報を併せて不法電波監視装置に送信することができる。 As described above, according to the present embodiment, the signal detection device 100 detects the position of the illegal radio wave source 400 based on the position information of the sampling device 200 that detected the illegal radio wave source 400 performing illegal communication. Can be estimated. Thereby, as in the first embodiment, the signal detection device 100 acquires the signal waveform data from which unnecessary radio waves are removed from the sampling device 200 and transmits the signal waveform data to the illegal radio wave monitoring device that is the host device 300, and also estimates the estimated illegal radio waves. The position information of the source 400 can also be transmitted to the illegal radio wave monitoring apparatus.
実施の形態３．
　実施の形態３では、信号検出装置１００およびサンプリング装置２００を用いて、信号源の位置を推定する信号源位置推定システムについて説明する。 Embodiment 3 FIG.
In the third embodiment, a signal source position estimation system that estimates the position of a signal source using the signal detection apparatus 100 and the sampling apparatus 200 will be described.
　信号検出装置１００およびサンプリング装置２００の構成は、実施の形態１のときと同様である。実施の形態３では、信号検出装置１００の組み合わせ検出部１０４は、同一周波数帯域の同一時刻に信号が存在するコネクションについて、通信を行っていないとは判定せず、同一の信号源が送信した信号を受信したものとして信号源の位置を推定する。 The configurations of the signal detection device 100 and the sampling device 200 are the same as those in the first embodiment. In Embodiment 3, the combination detection unit 104 of the signal detection device 100 does not determine that communication is not being performed for connections in which signals exist at the same time in the same frequency band, and signals transmitted from the same signal source. As a result, the position of the signal source is estimated.
　図１２は、実施の形態３にかかる信号源位置推定システム９２０の構成例を示す図である。信号源位置推定システム９２０は、信号検出装置１００と、サンプリング装置２００－１～２００－３と、上位装置３００と、を備える。図１２ではサンプリング装置２００は３台であるが、一例であり、３台より多くてもよいし少なくてもよい。信号源位置推定システム９２０において、サンプリング装置２００が設置された周辺には、信号源５００が存在している。信号源位置推定システム９２０では、信号検出装置１００およびサンプリング装置２００を用いて、信号源５００の位置を推定する。 FIG. 12 is a diagram illustrating a configuration example of the signal source position estimation system 920 according to the third embodiment. The signal source position estimation system 920 includes a signal detection device 100, sampling devices 200-1 to 200-3, and a host device 300. In FIG. 12, there are three sampling devices 200, but this is an example, and the number may be more or less than three. In the signal source position estimation system 920, the signal source 500 exists in the vicinity where the sampling device 200 is installed. The signal source position estimation system 920 estimates the position of the signal source 500 using the signal detection device 100 and the sampling device 200.
　信号検出装置１００の組み合わせ検出部１０４の動作に着目する。組み合わせ検出部１０４は、コネクション検出時、有効信号情報リストの組み合わせから同一周波数帯の同時刻に受信された固定長信号を検出する。組み合わせ検出部１０４は、同一周波数帯の同一時刻に信号が存在している領域について、コネクション内の複数の時刻に同様に固定長信号が存在している場合、有効信号情報リストに含まれる平均受信電力、およびサンプリング装置２００－１～２００－３の位置情報に基づいて、検出された固定長信号の送信元である信号源５００の位置を推定する。 Focus on the operation of the combination detection unit 104 of the signal detection device 100. The combination detection unit 104 detects a fixed-length signal received at the same time in the same frequency band from the combination of the valid signal information list when detecting the connection. The combination detection unit 104, for a region where a signal exists at the same time in the same frequency band, if a fixed-length signal exists similarly at a plurality of times in the connection, the average reception included in the effective signal information list Based on the power and the position information of the sampling devices 200-1 to 200-3, the position of the signal source 500 that is the transmission source of the detected fixed-length signal is estimated.
　図１３は、実施の形態３にかかる信号検出装置１００の組み合わせ検出部１０４が信号源５００の位置を推定する際のサンプリング装置２００－１～２００－３からの有効信号情報リストの情報の例を示す図である。図１３の例では、信号検出装置１００が取得した有効信号情報リストにおいて、サンプリング装置２００－１が信号源５００から受信した信号の平均受信電力が最も大きく、つぎにサンプリング装置２００－３が信号源５００から受信した信号の平均受信電力が大きく、サンプリング装置２００－２が信号源５００から受信した信号の平均受信電力が最も小さいことを示している。組み合わせ検出部１０４は、信号源５００の位置を推定する方法として、例えば、電波の減衰が距離の２乗に比例するといったことを利用して位置を推定することが可能である。 FIG. 13 is an example of information in the effective signal information list from the sampling devices 200-1 to 200-3 when the combination detection unit 104 of the signal detection device 100 according to the third embodiment estimates the position of the signal source 500. FIG. In the example of FIG. 13, in the effective signal information list acquired by the signal detection device 100, the average received power of the signal received by the sampling device 200-1 from the signal source 500 is the largest, and then the sampling device 200-3 receives the signal source. The average received power of the signal received from 500 is large, and the average received power of the signal received from the signal source 500 by the sampling device 200-2 is the smallest. As a method for estimating the position of the signal source 500, the combination detection unit 104 can estimate the position using, for example, the fact that the attenuation of radio waves is proportional to the square of the distance.
　以上説明したように、本実施の形態によれば、信号検出装置１００は、コネクション検出時、同一周波数帯の同一時刻に信号が存在している領域での各サンプリング装置２００の平均受信電力、および各サンプリング装置２００の位置情報に基づいて、信号源５００の位置を推定することが可能となる。 As described above, according to the present embodiment, when detecting a connection, the signal detection device 100 has an average received power of each sampling device 200 in a region where a signal exists at the same time in the same frequency band, and Based on the position information of each sampling device 200, the position of the signal source 500 can be estimated.
実施の形態４．
　実施の形態４では、実施の形態１の方法によってコネクションを検出し、実施の形態３またはその他の方法によって信号源の位置が推定された場合に、信号源の周辺に電波が発射されないように干渉回避通信を行う干渉回避通信システムについて説明する。 Embodiment 4 FIG.
In the fourth embodiment, when a connection is detected by the method of the first embodiment and the position of the signal source is estimated by the third embodiment or other methods, interference is prevented so that radio waves are not emitted around the signal source. An interference avoidance communication system that performs avoidance communication will be described.
　信号検出装置１００およびサンプリング装置２００の構成は、実施の形態３のときと同様である。干渉回避通信、例えば、既存の通信に干渉を与えず通信を行うコグニティブ無線通信では、既存の信号源方向、具体的には既存の信号源の通信エリアに電波が発射されないように通信を行うことが効果的である。実施の形態４の具体的な動作について説明する。図１４は、実施の形態４にかかる干渉回避通信システム９３０の構成例を示す図である。干渉回避通信システム９３０は、信号検出装置１００と、サンプリング装置２００－１，２００－２と、上位装置３００と、干渉回避通信装置７００－１～７００－３と、を備える。干渉回避通信装置７００－１～７００－３を区別しない場合、干渉回避通信装置７００と称する場合がある。 The configurations of the signal detection device 100 and the sampling device 200 are the same as in the third embodiment. In interference avoidance communication, for example, cognitive wireless communication that performs communication without causing interference to existing communication, communication is performed so that radio waves are not emitted in the existing signal source direction, specifically, in the communication area of the existing signal source. Is effective. A specific operation of the fourth embodiment will be described. FIG. 14 is a diagram of a configuration example of the interference avoidance communication system 930 according to the fourth embodiment. The interference avoidance communication system 930 includes a signal detection device 100, sampling devices 200-1 and 200-2, a host device 300, and interference avoidance communication devices 700-1 to 700-3. When the interference avoidance communication apparatuses 700-1 to 700-3 are not distinguished, they may be referred to as interference avoidance communication apparatuses 700.
　干渉回避通信装置７００は、公知の無線送受信器および指向性アンテナを含む通信装置である。干渉回避通信装置７００は、上位装置３００または信号検出装置１００から通信許可指示のメッセージを受信した場合にのみ、通信許可指示のメッセージを受信した他の干渉回避通信装置７００との間で通信が可能となる。干渉回避通信装置７００は、上位装置３００または信号検出装置１００から通信停止指示のメッセージを受信した場合、ただちに通信を停止する。 The interference avoidance communication device 700 is a communication device including a known wireless transceiver and a directional antenna. The interference avoidance communication apparatus 700 can communicate with another interference avoidance communication apparatus 700 that has received the communication permission instruction message only when the communication permission instruction message is received from the host apparatus 300 or the signal detection apparatus 100. It becomes. When the interference avoidance communication device 700 receives a communication stop instruction message from the host device 300 or the signal detection device 100, the interference avoidance communication device 700 immediately stops communication.
　図１４において、信号検出装置１００は、実施の形態１の方法により、サンプリング装置２００－１，２００－２のコネクションを検出し、また、実施の形態３またはその他の方法により信号源の位置を推定する。この場合、信号検出装置１００または上位装置３００は、既存通信源６００－１，６００－２の方向、具体的には、既存通信源６００－１，６００－２の通信エリアに電波が発射されることの無いよう、通信可能な干渉回避通信装置７００－１，７００－２に対して、通信可能であることを指示する通信許可指示のメッセージを送信する。図１４において、信号検出装置１００または上位装置３００は、干渉回避通信装置７００－３と干渉回避通信装置７００－１との通信、および干渉回避通信装置７００－３と干渉回避通信装置７００－２との通信は、既存通信源６００－１，６００－２との通信に干渉する可能性があることと判断する。信号検出装置１００または上位装置３００は、既存通信源６００－１，６００－２間の通信を考慮し、干渉回避通信装置７００－１，７００－２に対して、干渉回避通信装置７００－１，７００－２間の通信のみを許可することを指示する通信許可指示のメッセージを送信する。 In FIG. 14, the signal detection apparatus 100 detects the connection between the sampling apparatuses 200-1 and 200-2 by the method of the first embodiment, and estimates the position of the signal source by the third embodiment or other methods. To do. In this case, the signal detection device 100 or the host device 300 emits radio waves in the direction of the existing communication sources 600-1 and 600-2, specifically, the communication areas of the existing communication sources 600-1 and 600-2. In order to prevent this, a communication permission instruction message instructing that communication is possible is transmitted to the communicable interference avoidance communication apparatuses 700-1 and 700-2. In FIG. 14, the signal detection device 100 or the host device 300 communicates between the interference avoidance communication device 700-3 and the interference avoidance communication device 700-1, and the interference avoidance communication device 700-3 and the interference avoidance communication device 700-2. It is determined that there is a possibility that this communication may interfere with communication with the existing communication sources 600-1 and 600-2. The signal detection device 100 or the host device 300 considers communication between the existing communication sources 600-1 and 600-2, and the interference avoidance communication devices 700-1 and 700-2. A communication permission instruction message instructing permission of only the communication between 700-2 is transmitted.
　信号検出装置１００または上位装置３００は、周辺の通信環境が変化し、干渉回避通信装置７００－１，７００－２の通信が既存通信源に干渉を与えると判断した場合、例えば、干渉回避通信装置７００－１，７００－２のいずれかが移動可能な端末であって、いずれかが移動したことによって既存通信源６００－１，６００－２の通信エリア内に入ってしまった場合、通信停止指示のメッセージを干渉回避通信装置７００－１，７００－２に対して送信する。 When the signal detection device 100 or the host device 300 determines that the communication environment of the surroundings changes and the communication of the interference avoidance communication devices 700-1 and 700-2 interferes with the existing communication source, for example, the interference avoidance communication device If either 700-1 or 700-2 is a movable terminal and one of them moves into the communication area of the existing communication source 600-1, 600-2, the communication stop instruction Is transmitted to the interference avoidance communication apparatuses 700-1 and 700-2.
　干渉回避通信装置７００－１，７００－２は、通信許可指示のメッセージを受信した場合は通信を行い、通信停止指示のメッセージを受信した場合はただちに通信を停止する。 Interference avoidance communication apparatuses 700-1 and 700-2 perform communication when a communication permission instruction message is received, and immediately stop communication when a communication stop instruction message is received.
　なお、干渉回避通信装置７００－１，７００－２に対して通信許可指示のメッセージおよび通信停止指示のメッセージを送信する制御については、上位装置３００が行ってもよいし、上位装置３００が信号検出装置１００を介して送信するようにしてもよい。また、信号検出装置１００において、組み合わせ検出部１０４が、コネクションの検出結果、既存通信源６００－１，６００－２の推定位置などに基づいて、干渉回避通信装置７００－１，７００－２に対して通信許可指示のメッセージおよび通信停止指示のメッセージを送信する制御を行ってもよい。 Note that control for transmitting a communication permission instruction message and a communication stop instruction message to the interference avoidance communication apparatuses 700-1 and 700-2 may be performed by the host apparatus 300, or the host apparatus 300 may detect a signal. You may make it transmit via the apparatus 100. FIG. Further, in the signal detection device 100, the combination detection unit 104 determines the interference avoidance communication devices 700-1 and 700-2 based on the connection detection result and the estimated positions of the existing communication sources 600-1 and 600-2. Control for transmitting a communication permission instruction message and a communication stop instruction message may be performed.
　以上説明したように、本実施の形態によれば、干渉回避通信システム９３０は、実施の形態１と同様の処理で検出したコネクション情報、および実施の形態３で説明した処理などによって推定した信号源の位置情報を利用して、既存の通信に干渉を与えることなく、干渉回避通信装置７００は通信を行うことができる。 As described above, according to the present embodiment, the interference avoidance communication system 930 uses the connection information detected by the same processing as in the first embodiment, the signal source estimated by the processing described in the third embodiment, and the like. The interference avoidance communication apparatus 700 can perform communication without causing interference to existing communication by using the position information.
　以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
　１００　信号検出装置、１０１，２０１　無線送受信部、１０２，２０２　メッセージ受信部、１０３　信号検出部、１０４　組み合わせ検出部、１０５，２０７　メッセージ送信部、１０６，２０９，２１０　アンテナ、２００－１～２００－６　サンプリング装置、２０３　無線受信部、２０４　信号波形記録部、２０５　スペクトログラム作成部、２０６　有効信号判定部、２０８　信号波形抽出部、３００　上位装置、４００－１～４００－４　不法電波源、５００　信号源、６００－１，６００－２　既存通信源、７００－１～７００－３　干渉回避通信装置、９００　信号検出システム、９１０　不法電波監視システム、９２０　信号源位置推定システム、９３０　干渉回避通信システム。 100 signal detection device, 101, 201 wireless transmission / reception unit, 102, 202 message reception unit, 103 signal detection unit, 104 combination detection unit, 105, 207 message transmission unit, 106, 209, 210 antenna, 200-1 to 200-6 Sampling device, 203 wireless reception unit, 204 signal waveform recording unit, 205 spectrogram creation unit, 206 valid signal determination unit, 208 signal waveform extraction unit, 300 host device, 400-1 to 400-4 illegal radio wave source, 500 signal source, 600-1, 600-2, existing communication source, 700-1 to 700-3 interference avoidance communication device, 900 signal detection system, 910 illegal radio wave monitoring system, 920 signal source position estimation system, 930 interference avoidance communication system.

Claims (11)

  1. 　複数のサンプリング装置から信号の受信状態を示す有効信号情報リストを取得し、前記信号から規定された信号強度を有する第１の信号を検出する信号検出部と、
    　前記有効信号情報リストの組み合わせから、前記第１の信号のうち同一周波数帯の通信で使用されている信号である第２の信号の組み合わせを検出し、前記第２の信号の受信状態が含まれる有効信号情報リストの送信元のサンプリング装置の組み合わせおよび前記第２の信号の受信期間を示すコネクション情報を作成する組み合わせ検出部と、
    　前記コネクション情報に基づいて、前記サンプリング装置で受信された信号の信号波形データの抽出期間を示す信号抽出メッセージを生成し、前記コネクション情報に該当するサンプリング装置に送信するメッセージ送信部と、
    　前記サンプリング装置から前記有効信号情報リストを受信した場合は前記信号検出部に出力し、前記サンプリング装置から前記信号抽出メッセージに対する応答である信号波形データを受信した場合は上位装置に送信するメッセージ受信部と、
    　を備えることを特徴とする信号検出装置。     A signal detection unit that acquires a valid signal information list indicating reception states of signals from a plurality of sampling devices, and detects a first signal having a signal strength defined from the signals;
    From the combination of the valid signal information lists, a combination of second signals that are signals used in communication in the same frequency band among the first signals is detected, and the reception state of the second signals is included. A combination detection unit for creating connection information indicating a combination of a sampling device as a transmission source of the valid signal information list and a reception period of the second signal;
    Based on the connection information, generate a signal extraction message indicating an extraction period of the signal waveform data of the signal received by the sampling device, and transmit a message transmission unit to the sampling device corresponding to the connection information;
    When receiving the valid signal information list from the sampling device, output to the signal detection unit, and when receiving signal waveform data as a response to the signal extraction message from the sampling device, a message receiving unit that transmits to the host device When,
    A signal detection apparatus comprising:
  2. 　前記有効信号情報リストには、有効周波数帯域、受信開始時刻、受信持続時間、受信終了時刻、および平均受信電力のうち少なくとも１つ以上が含まれる、
    　ことを特徴とする請求項１に記載の信号検出装置。     The effective signal information list includes at least one of an effective frequency band, a reception start time, a reception duration, a reception end time, and an average received power.
    The signal detection device according to claim 1.
  3. 　前記組み合わせ検出部は、前記有効信号情報リストの組み合わせにおいて、２台のサンプリング装置での前記第１の信号の受信頻度および受信順に基づいて、前記第２の信号の組み合わせを検出する、
    　ことを特徴とする請求項１または２に記載の信号検出装置。     The combination detection unit detects the combination of the second signals based on the reception frequency and reception order of the first signals in two sampling devices in the combination of the effective signal information lists.
    The signal detection apparatus according to claim 1, wherein the signal detection apparatus is a signal detection apparatus.
  4. 　前記組み合わせ検出部は、前記有効信号情報リストの組み合わせにおいて、同一周波数帯の同時刻に前記第１の信号が存在する場合、該当するコネクション情報を削除する、
    　ことを特徴とする請求項１から３のいずれか１つに記載の信号検出装置。     The combination detection unit deletes the corresponding connection information when the first signal exists at the same time in the same frequency band in the combination of the valid signal information lists.
    The signal detection device according to claim 1, wherein the signal detection device is a signal detection device.
  5. 　前記組み合わせ検出部は、前記有効信号情報リストの組み合わせにおいて、同一周波数帯の同時刻に前記第１の信号が存在する場合、平均受信電力の最も高い第１の信号以外の第１の信号を有効信号情報リストから削除する、
    　ことを特徴とする請求項１から３のいずれか１つに記載の信号検出装置。     In the combination of the valid signal information lists, the combination detection unit validates a first signal other than the first signal having the highest average received power when the first signal exists at the same time in the same frequency band. Delete from the signal information list,
    The signal detection device according to claim 1, wherein the signal detection device is a signal detection device.
  6. 　信号検出装置からの指示に基づいてサンプリングを開始する無線受信部と、
    　前記無線受信部でのサンプリングによって受信された信号の波形データである信号波形データを記憶する信号波形記憶部と、
    　前記信号波形データを用いてスペクトログラムを作成するスペクトログラム作成部と、
    　前記スペクトログラムを用いて有効信号情報リストを作成する有効信号判定部と、
    　前記有効信号情報リストを含むメッセージを前記信号検出装置に送信するメッセージ送信部と、
    　前記信号検出装置から受信した信号抽出メッセージで示される抽出期間の前記信号波形データを前記信号波形記憶部から抽出する信号波形抽出部と、
    　を備え、
    　前記メッセージ送信部は、前記信号波形抽出部で抽出された前記信号波形データを含むメッセージを前記信号検出装置に送信する、
    　ことを特徴とするサンプリング装置。     A wireless receiver that starts sampling based on an instruction from the signal detection device;
    A signal waveform storage unit that stores signal waveform data that is waveform data of a signal received by sampling in the wireless reception unit;
    A spectrogram creating unit that creates a spectrogram using the signal waveform data;
    An effective signal determination unit that creates an effective signal information list using the spectrogram;
    A message transmission unit that transmits a message including the valid signal information list to the signal detection device;
    A signal waveform extraction unit that extracts the signal waveform data of the extraction period indicated by the signal extraction message received from the signal detection device from the signal waveform storage unit;
    With
    The message transmission unit transmits a message including the signal waveform data extracted by the signal waveform extraction unit to the signal detection device;
    A sampling device characterized by that.
  7. 　前記有効信号情報リストには、有効周波数帯域、受信開始時刻、受信持続時間、受信終了時刻、および平均受信電力のうち少なくとも１つ以上が含まれる、
    　ことを特徴とする請求項６に記載のサンプリング装置。     The effective signal information list includes at least one of an effective frequency band, a reception start time, a reception duration, a reception end time, and an average received power.
    The sampling apparatus according to claim 6.
  8. 　請求項１から５のいずれか１つに記載の信号検出装置と、
    　請求項６または７に記載のサンプリング装置と、
    　を備え、
    　前記信号検出装置は、前記コネクション情報に該当するサンプリング装置の位置情報に基づいて前記第２の信号で通信を行っている通信系の位置を推定し、前記通信系の位置情報を前記上位装置に送信する、
    　ことを特徴とする不法電波監視システム。     A signal detection device according to any one of claims 1 to 5;
    A sampling device according to claim 6 or 7,
    With
    The signal detection device estimates a position of a communication system performing communication using the second signal based on position information of a sampling device corresponding to the connection information, and sends the position information of the communication system to the host device. Send,
    An illegal radio wave monitoring system.
  9. 　請求項１に記載の信号検出装置と、
    　請求項６に記載のサンプリング装置と、
    　を備え、
    　前記信号検出装置は、前記有効信号情報リストの組み合わせから同一周波数帯の同時刻に受信された第１の信号を検出し、各有効信号情報リストに含まれる前記第１の信号の平均受信電力、および前記サンプリング装置の位置情報に基づいて、検出された第１の信号の送信元である信号源の位置を推定する、
    　ことを特徴とする信号源位置推定システム。     A signal detection device according to claim 1;
    A sampling device according to claim 6;
    With
    The signal detection device detects a first signal received at the same time in the same frequency band from a combination of the effective signal information lists, and an average received power of the first signal included in each effective signal information list, And estimating the position of the signal source that is the transmission source of the detected first signal based on the position information of the sampling device,
    A signal source position estimation system.
  10. 　請求項９に記載の信号源位置推定システムの信号検出装置と、
    　請求項９に記載の信号源位置推定システムのサンプリング装置と、
    　通信装置と、
    　を備え、
    　前記信号検出装置または前記上位装置は、前記信号源の位置から規定された範囲である通信エリアの外の通信装置に対して通信を許可する通信許可指示メッセージを送信し、前記通信許可指示メッセージを受信した前記通信装置のうち位置が前記通信エリア内になった通信装置に対して通信の停止を指示する通信停止指示メッセージを送信し、
    　前記通信装置は、前記通信許可指示メッセージを受信した場合は通信を開始し、前記通信停止指示メッセージを受信した場合は通信を停止する、
    　ことを特徴とする干渉回避通信システム。     A signal detection apparatus of the signal source position estimation system according to claim 9,
    A sampling device of the signal source position estimation system according to claim 9,
    A communication device;
    With
    The signal detection device or the host device transmits a communication permission instruction message that permits communication to a communication device outside a communication area that is a range defined from the position of the signal source, and the communication permission instruction message Sending a communication stop instruction message instructing to stop communication to a communication device whose position is within the communication area among the received communication devices,
    The communication device starts communication when the communication permission instruction message is received, and stops communication when the communication stop instruction message is received.
    An interference avoidance communication system.
  11. 　信号検出装置が、サンプリング装置にサンプリングを指示する指示ステップと、
    　サンプリング装置が、サンプリングで得られた信号波形データを用いて信号の受信状態を示す有効信号情報リストを作成し、前記信号検出装置に送信する有効信号情報リスト送信ステップと、
    　前記信号検出装置が、前記有効信号情報リストに基づいて前記信号波形データの抽出期間を示す信号抽出メッセージを生成し、前記サンプリング装置に送信する信号抽出メッセージ送信ステップと、
    　前記サンプリング装置が、前記抽出期間で示された信号波形データを前記信号検出装置に送信する第１の信号波形データ送信ステップと、
    　前記信号検出装置が、取得した信号波形データを上位装置に送信する第２の信号波形データ送信ステップと、
    　を含むことを特徴とする信号波形データ収集方法。     An instruction step in which the signal detection device instructs the sampling device to perform sampling; and
    A sampling device creates an effective signal information list indicating a signal reception state using signal waveform data obtained by sampling, and transmits the effective signal information list to the signal detection device; and
    The signal detection device generates a signal extraction message indicating an extraction period of the signal waveform data based on the valid signal information list, and transmits the signal extraction message to the sampling device; and
    A first signal waveform data transmission step in which the sampling device transmits the signal waveform data indicated in the extraction period to the signal detection device;
    A second signal waveform data transmission step in which the signal detection device transmits the acquired signal waveform data to a host device;
    A signal waveform data collection method comprising:
PCT/JP2017/007445 2017-02-27 2017-02-27 Signal detection device, sampling device, illegal radio wave monitoring system, signal source position estimation system, interference prevention communication system, and signal waveform data collection method WO2018154772A1 (en)

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