WO2025013709A1 - Interference wave analysis device, interference wave analysis system, interference wave analysis method, and interference wave analysis program - Google Patents

Abstract

An interference wave analysis device according to the present disclosure comprises: a reception unit that receives a communication radio wave used for radio communication between a plurality of communication devices and an interference wave that interferes with the communication radio wave; an estimation unit that estimates the type of the interference wave on the basis of the reception timing, the continuous reception time, and the reception level of each of the communication radio wave and the interference wave; and an output unit that outputs the estimation result by the estimation unit.

Description

Interference wave analysis device, interference wave analysis system, interference wave analysis method, and interference wave analysis program

This disclosure relates to an interference wave analysis device, an interference wave analysis system, an interference wave analysis method, and an interference wave analysis program.

In recent years, there has been a demand for improving the electromagnetic wave capabilities of wireless devices. Specifically, there has been a demand for quickly identifying the cause of degradation in communication quality between wireless devices and removing the cause of the degradation. Related technology is disclosed, for example, in Patent Document 1.

Patent Document 1 discloses a factor estimation device that estimates the factors that cause degradation of communication quality between a first wireless station and a second wireless station using an estimation model constructed by machine learning.

International Publication No. 2022/195755

The device disclosed in Patent Document 1 estimates the causes of degradation of communication quality, but does not go so far as to estimate the type of interference wave. Therefore, the device disclosed in Patent Document 1 has the problem that it cannot deal with interference waves according to their type (remove the causes of degradation of communication quality).

One of the objectives of this disclosure is to provide an interference wave analysis device, an interference wave analysis system, an interference wave analysis method, and an interference wave analysis program that solve the above-mentioned problems.

An interference wave analysis device according to one aspect of the present disclosure includes a receiving unit that receives communication radio waves used for wireless communication between multiple communication devices and interference waves that interfere with the communication radio waves, an estimation unit that estimates the type of the interference waves based on the reception timing, continuous reception time, and reception level of the communication radio waves and the interference waves, respectively, and an output unit that outputs the estimation result by the estimation unit.

In an interference wave analysis method according to one aspect of the present disclosure, a computer receives communication radio waves used for wireless communication between multiple communication devices and interference waves that interfere with the communication radio waves, estimates the type of interference wave based on the reception timing, continuous reception time, and reception level of the communication radio waves and the interference wave, and outputs the estimation result.

The interference wave analysis program according to one aspect of the present disclosure causes a computer to execute a process of receiving communication radio waves used for wireless communication between multiple communication devices and interference waves that interfere with the communication radio waves, a process of estimating the type of the interference waves based on the reception timing, continuous reception time, and reception level of the communication radio waves and the interference waves, and a process of outputting the estimation result.

The present disclosure can provide an interference wave analysis device, an interference wave analysis system, an interference wave analysis method, and an interference wave analysis program that can estimate the type of interference wave.

1 is a block diagram showing an example of the configuration of an interference wave analysis system provided with an interference wave analysis device according to the present disclosure. 4 is a flowchart showing the operation of the interference wave analysis device according to the present disclosure. 4 is a waveform diagram of an interference wave analyzed by an interference wave analysis device according to the present disclosure. FIG. 1 is a diagram showing the relationship between the frequency and reception level of an interference wave analyzed by an interference wave analysis device according to the present disclosure. 1 is a diagram showing the relationship between the frequency and reception level of an interference wave analyzed by an interference wave analysis device according to the present disclosure. 1 is a block diagram showing an example of the configuration of a communication quality monitoring system provided with a communication quality monitoring device according to the present disclosure; 4 is a flowchart showing an operation of the communication quality monitoring device according to the present disclosure. 1 is a block diagram showing an example of the configuration of an interference wave analysis system provided with an interference wave analysis device according to the present disclosure. 4 is a flowchart showing the operation of the interference wave analysis device according to the present disclosure. 1 is a diagram showing an example of electromagnetic wave information stored by an interference wave analysis device according to the present disclosure. FIG. 1 is a block diagram showing an example of a hardware configuration for implementing an interference wave analysis function of an interference wave analysis device according to the present disclosure. FIG. 1 is a block diagram showing an example of a hardware configuration for implementing a communication quality monitoring function of a communication quality monitoring device according to the present disclosure.

Below, the embodiments will be explained with reference to the drawings. Note that the drawings are simplified, and the technical scope of the embodiments should not be interpreted narrowly based on the descriptions in the drawings. Also, the same elements are given the same reference numerals, and duplicate explanations will be omitted.

In the following embodiments, when necessary for convenience, they will be explained divided into multiple sections or embodiments. However, unless otherwise specified, they are not unrelated to each other, and one is a partial or complete modification, application example, detailed explanation, supplementary explanation, etc. of the other. Furthermore, in the following embodiments, when the number of elements (including numbers, values, amounts, ranges, etc.) is mentioned, it is not limited to that specific number, and may be more or less than the specific number, except when otherwise specified or when it is clearly limited in principle to a specific number.

Furthermore, in the following embodiments, the components (including operational steps, etc.) are not necessarily essential unless otherwise specified or considered to be clearly essential in principle. Similarly, in the following embodiments, when referring to the shape, positional relationship, etc. of components, etc., it is intended to include things that are substantially similar or approximate to the shape, etc., unless otherwise specified or considered to be clearly not essential in principle. The same applies to the numbers, etc. above (including numbers, numerical values, amounts, ranges, etc.).

<First embodiment>
FIG. 1 is a block diagram showing an example of the configuration of an interference wave analysis system 1 provided with an interference wave analysis device according to the present disclosure.

As shown in FIG. 1, the interference wave analysis system 1 includes at least an interference wave analysis device 11 and communication devices 12_1 to 12_2. In the example of FIG. 1, two communication devices 12_1 to 12_2 are provided, but this is not limited thereto, and two or more n communication devices 12_1 to 12_n may be provided.

The communication devices 12_1 to 12_2 communicate wirelessly with each other. Each of the communication devices 12_1 to 12_2 may be, for example, a portable terminal carried by a user, or may be a base station.

The interference wave analysis device 11 is a device that analyzes interference waves that interfere with communication radio waves used for wireless communication between the communication devices 12_1 to 12_2. By estimating the type of interference wave using the interference wave analysis device 11, it becomes possible to deal with the interference wave according to the type of interference wave, such as taking appropriate measures to suppress deterioration of communication quality, or taking appropriate measures to prevent communication disruption due to the interference wave when the interference wave is a jamming wave. The interference wave analysis device 11 may be mounted on any of the communication devices 12_1 to 12_2, or may be provided separately from the communication devices 12_1 to 12_2.

Specifically, the interference wave analysis device 11 includes a receiving unit 111, an interference wave estimation unit 112, and an output unit 113.

The receiver 111 receives radio waves including communication radio waves used for wireless communication between the communication devices 12_1 and 12_2 and interference waves that interfere with the communication radio waves. The interference wave estimation unit 112 estimates the type of interference wave based on the reception timing, continuous reception time, and reception level of each of the received communication radio waves and interference waves. Details of the method of estimating the type of interference wave by the interference wave analysis device 11 will be described later.

The reception timing of the communication radio waves and the interference waves by the receiver 111 provided in the interference wave analysis device 11 can also be said to be the transmission timing of the communication radio waves by the communication device that transmits the communication radio waves among the communication devices 12_1 to 12_2, and the generation timing of the interference waves. Also, the continuous reception time of the communication radio waves and the interference waves by the receiver 111 provided in the interference wave analysis device 11 can also be said to be the continuous transmission time of the communication radio waves by the communication device that transmits the communication radio waves among the communication devices 12_1 to 12_2, and the continuous generation time of the interference waves.

The output unit 113 outputs the estimation result by the interference wave estimation unit 112. For example, the output unit 113 displays information on the type of interference wave estimated by the interference wave estimation unit 112 on a monitor or the like.

Next, the operation of the interference wave analysis device 11 will be described. Figure 2 is a flowchart showing the operation of the interference wave analysis device 11. Figure 3 is a waveform diagram of an interference wave analyzed by the interference wave analysis device 11. Figure 4 is a diagram showing the relationship between the frequency and reception level of an interference wave analyzed by the interference wave analysis device 11. Figure 5 is a diagram showing the relationship between the frequency and reception level of an interference wave analyzed by the interference wave analysis device 11.

First, the interference wave analysis device 11 receives radio waves including communication radio waves used for wireless communication between the communication devices 12_1 and 12_2 and interference waves that interfere with the communication radio waves (step S101).

Then, the interference wave analysis device 11 judges whether or not the continuous reception time of the interference wave and the continuous reception time of the communication radio wave match (step S102). If the difference between the continuous reception time of the interference wave and the continuous reception time of the communication radio wave is within the allowable error range (first predetermined range), the interference wave analysis device 11 judges that the continuous reception time of the interference wave and the continuous reception time of the communication radio wave match.

For example, if the continuous reception time of the interference wave and the continuous reception time of the communication radio wave match (YES in step S102), the interference wave analysis device 11 then determines whether the reception timing of the interference wave and the reception timing of the communication radio wave match (step S103). Note that if the difference between the reception timing of the interference wave and the reception timing of the communication radio wave is within a second predetermined range, which is an allowable error range, the interference wave analysis device 11 determines that the reception timing of the interference wave and the reception timing of the communication radio wave match.

For example, if the timing of receiving the interference wave coincides with the timing of receiving the communication radio wave (YES in step S103), the interference wave analysis device 11 then determines whether or not at least one of the timing and frequency of receiving the interference wave changes in accordance with an intentional change in at least one of the timing and frequency of receiving the communication radio wave (step S104). Note that an intentional change in at least one of the timing and frequency of receiving the communication radio wave means an intentional change in at least one of the timing and frequency of transmitting the communication radio wave by a communication device that transmits the communication radio wave among the communication devices 12_1 to 12_2.

For example, if at least one of the reception timing and frequency of the interference wave changes in accordance with an intentional change in at least one of the reception timing and frequency of the communication radio wave (YES in step S104), the interference wave analysis device 11 estimates that this interference wave is caused by repeater interference (step S105) and outputs the estimation result (step S110).

In contrast, if neither the reception timing nor the frequency of the interference wave changes in accordance with any intentional change in the reception timing or frequency of the communication radio wave (NO in step S104), the interference wave analyzer 11 estimates that the interference wave is caused by the communication radio wave in use and is not an external jamming wave (step S106), and outputs the estimation result (step S110).

Also, in the processing of step S103, even if the timing of receiving the interference wave does not match the timing of receiving the communication radio wave (NO in step S103), the interference wave analyzer 11 estimates that the interference wave is caused by the communication radio wave in use and is not an external jamming wave (step S106), and outputs the estimation result (step S110).

If, in the process of step S102, the continuous reception time of the interference wave does not match the continuous reception time of the communication radio wave (NO in step S102), the interference wave analysis device 11 then determines whether the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range (step S107). In other words, the interference wave analysis device 11 determines whether the radio wave forming the interference wave exhibits a wide frequency range that includes the communication radio wave and a large reception level.

For example, if the radio waves forming the interference waves show a reception level above a threshold level in a frequency range above a predetermined frequency range (YES in step S107), the interference wave analysis device 11 estimates that the interference waves are caused by coverage interference (step S108) and outputs the estimation result (step S110).

In contrast, if the radio waves forming the interference waves do not show a reception level above the threshold level in a frequency range above the specified frequency range (NO in step S107), the interference wave analyzer 11 estimates that the interference waves are caused by other communication radio waves and are not jamming waves from outside (step S109), and outputs the estimation result (step S110).

Here, we will explain how the interference wave analyzer 11 estimates the types of interference waves A to C in Figure 3.

For example, the continuous reception time and reception timing of the interference wave A are the same as those of the communication radio waves in use (YES in step S102 in FIG. 2 → YES in step S103). Therefore, as shown in the example of FIG. 4, if the reception timing and frequency of the interference wave A change in accordance with the intentional change in the reception timing and frequency of the communication radio waves (YES in step S104), the interference wave analysis device 11 estimates that the interference wave A is caused by repeater interference (step S105). On the other hand, if the reception timing and frequency of the interference wave A do not change in accordance with the intentional change in the reception timing and frequency of the communication radio waves (NO in step S104), the interference wave analysis device 11 estimates that the interference wave A is caused by the communication radio waves in use and is not an external interference wave (step S106).

Furthermore, when comparing the interference wave B with the communication radio waves in use, the continuous reception time matches, but the reception timing does not match (YES in step S102 in FIG. 2 → NO in step S103). Therefore, the interference wave analyzer 11 estimates that the interference wave B is caused by the communication radio waves in use and is not an external interference wave (step S106).

Furthermore, the continuous reception time of the interference wave C does not match when compared with the communication radio waves in use (NO in step S102 in FIG. 2). Therefore, as shown in the upper diagram of FIG. 5, if the radio waves forming the interference wave C show a reception level above the threshold level in a frequency range above a predetermined frequency range (threshold range) (YES in step S107), the interference wave analysis device 11 estimates that this interference wave is caused by coverage interference (step S108). On the other hand, as shown in the lower diagram of FIG. 5, if the radio waves forming the interference wave C do not show a reception level above the threshold level in a frequency range above a predetermined frequency range (threshold range) (NO in step S107), the interference wave analysis device 11 estimates that this interference wave is caused by other communication radio waves and is not an external interference wave (step S109).

In this way, the interference wave analysis device 11 according to the present disclosure can not only detect interference waves, but also estimate the type of interference wave. This makes it possible to deal with the interference wave according to the type of interference wave, for example, appropriate measures to suppress deterioration of communication quality, and appropriate measures to prevent communication disruption due to the interference wave when the interference wave is a jamming wave.

<Embodiment 2>
6 is a block diagram showing an example of the configuration of a communication quality monitoring system 2 provided with a communication quality monitoring device according to the present disclosure. The communication quality monitoring device according to the present disclosure includes an interference wave analyzing device 11 having an interference wave analyzing function.

As shown in FIG. 6, the communication quality monitoring system 2 includes at least a communication quality monitoring device 21 and communication devices 12_1 to 12_2. In the example of FIG. 6, two communication devices 12_1 to 12_2 are provided, but this is not limited thereto, and two or more (n) communication devices 12_1 to 12_n may be provided.

The communication quality monitoring device 21 is a device that monitors the quality of wireless communication between the communication devices 12_1 to 12_2. By estimating the cause of the deterioration of communication quality using the communication quality monitoring device 21, it becomes possible to take appropriate measures to suppress the deterioration of communication quality, and to take appropriate measures to prevent communication disruption caused by the interference wave when the interference wave is a jamming wave. The communication quality monitoring device 21 may be mounted on any of the communication devices 12_1 to 12_2, or may be provided separately from the communication devices 12_1 to 12_2.

Specifically, the communication quality monitoring device 21 includes a radio wave receiving unit 211, a first factor estimation unit 212, a second factor estimation unit 213, an interference wave analysis unit 214, and a monitoring result output unit 215.

The radio wave receiving unit 211 receives radio waves including communication radio waves used for wireless communication between the communication devices 12_1 and 12_2.

The first factor estimation unit 212 estimates the cause of the deterioration of communication quality due to, for example, fluctuations in the reception level according to physical laws, from the radio waves received by the radio wave receiving unit 211 using a rule-based algorithm, which is an analysis method that follows predetermined rules. Details of the method of estimating the cause of the deterioration of communication quality by the first factor estimation unit 212 will be described later.

When the second factor estimation unit 213 is unable to estimate the cause of the degradation of communication quality using the rule-based algorithm, it estimates the cause of the degradation of communication quality from the radio waves received by the radio wave receiving unit 211 using an estimation model (machine learning model) constructed by machine learning.

The interference wave analysis unit 214 has the interference wave analysis function (the function of the interference wave estimation unit 112) of the interference wave analysis device 11. Specifically, when the first factor estimation unit 212 or the second factor estimation unit 213 estimates that the cause of the deterioration of communication quality is an interference wave, the interference wave analysis unit 214 estimates the type of interference wave based on the reception timing, continuous reception time, and reception level of the received communication radio wave and interference wave.

The monitoring result output unit 215 outputs the cause of the deterioration of communication quality estimated by the first factor estimation unit 212 and the second factor estimation unit 213, and, when the cause of the deterioration of communication quality is an interference wave, the type of the interference wave estimated by the interference wave analysis unit 214. For example, the monitoring result output unit 215 displays this information on a monitor or the like.

Next, the operation of the communication quality monitoring device 21 will be explained. Figure 7 is a flowchart showing the operation of the communication quality monitoring device 21.

First, the communication quality monitoring device 21 receives radio waves including communication radio waves used for wireless communication between the communication devices 12_1 and 12_2 (step S201).

Then, the communication quality monitoring device 21 estimates the cause of the degradation of communication quality from the received radio waves using a rule-based algorithm (steps S202 to S209). When estimating the cause of the degradation of communication quality using the rule-based algorithm, at least one of the radio index values and their statistical values, for example, RSRP (Reference Signal Received Power), SINR (Signal to Interference plus Noise Ratio), RSRQ (Reference Signal Received Quality), and RSSI (Received Signal Strength Indicator), is referenced. Note that SINR is expressed as S/(I+N) where S is the signal component, N is the noise component, and I is the interference component.

First, the communication quality monitoring device 21 determines whether the C/N (carrier-to-noise ratio) is less than a predetermined value when the reception level of the communication radio wave is equal to or greater than a set value (step S202).

For example, if the C/N is less than a predetermined value even though the reception level of the communication radio wave is equal to or greater than the set value (YES in step S202), the communication quality monitoring device 21 estimates that the deterioration of communication quality is caused by interference waves (step S203). Note that at this time, the change in RSRP is small. The SINR decreases due to an increase in interference power. The RSRQ decreases. Also, the RSSI increases because radio waves from other communication devices are also received.

On the other hand, if the reception level of the communication radio waves is equal to or higher than the set value and the C/N is equal to or higher than the predetermined value (NO in step S202), the communication quality monitoring device 21 then determines whether the reception level of the communication radio waves has dropped sharply at a rate equal to or higher than the predetermined slew rate (step S204).

For example, if the reception level of the communication radio wave drops sharply at a rate equal to or greater than a predetermined slew rate (YES in step S204), the communication quality monitoring device 21 estimates that the deterioration in communication quality is due to obstruction (step S205). At this time, the RSRP drops sharply. The SINR also drops because of a decrease in signal strength. Both the RSRQ and RSSI drop.

In contrast, if the reception level of the communication radio waves does not drop sharply at a rate equal to or greater than the predetermined slew rate (NO in step S204), the communication quality monitoring device 21 then determines whether the reception level of the communication radio waves has attenuated to a level corresponding to the distance between the communication devices 12_1 and 12_2 between which communication is taking place (step S206).

For example, if the reception level of the communication radio waves attenuates to a level corresponding to the distance between the communication devices 12_1 and 12_2 that are communicating (YES in step S206), the communication quality monitoring device 21 estimates that the deterioration of communication quality is due to distance attenuation (step S207). At this time, the RSRP decreases gradually according to the moving speed of the communication device. The SINR decreases because the signal strength decreases. Both the RSRQ and RSSI decrease gradually. Furthermore, if the distance between the communication devices 12_1 and 12_2 is r, the reception level attenuates at a rate of 1/(r^2).

On the other hand, if the reception level of the communication radio waves has not attenuated to a level corresponding to the distance between the communication devices 12_1 and 12_2 between which communication is taking place (NO in step S206), the communication quality monitoring device 21 then determines whether or not the frequency distribution of the reception level of the communication radio waves shows a Rayleigh distribution (step S208).

For example, if the frequency distribution of the reception level of the communication radio wave shows a Rayleigh distribution (YES in step S208), the communication quality monitoring device 21 estimates that the deterioration of the communication quality is caused by fading (step S209). At this time, the RSRP increases or decreases depending on the fading conditions. The SINR decreases due to an increase in interference power. The RSRQ and RSSI increase or decrease depending on the fading conditions.

On the other hand, if the frequency distribution of the reception levels of the communication radio waves does not show a Rayleigh distribution (NO in step S208), the communication quality monitoring device 21 then estimates the cause of the degradation of communication quality from the received radio waves using the algorithm of the machine learning model (step S210). In other words, if the communication quality monitoring device 21 is unable to estimate the cause of the degradation of communication quality using the rule-based algorithm, it estimates the cause of the degradation of communication quality from the received radio waves using the algorithm of the machine learning model (step S210).

After that, if the communication quality monitoring device 21 estimates that the cause of the deterioration of communication quality is interference waves (YES in step S202 → processing in step S203, and YES in step S210 → processing in step S211), it estimates the type of interference waves based on the reception timing, continuous reception time, and reception level of the communication radio waves and interference waves (step S212). The method of estimating the type of interference waves by the communication quality monitoring device 21 is similar to the method of estimating the type of interference waves by the interference wave analysis device 11, so a description thereof will be omitted.

Then, the communication quality monitoring device 21 outputs the estimated cause of the degradation of communication quality and, if the cause of the degradation of communication quality is an interference wave, the estimated type of the interference wave (step S213).

Note that the multiple determination processes in the process of estimating the causes of degradation of communication quality using a rule-based algorithm are not limited to being performed in the order described above, and may be performed in any order or in parallel.

In this way, the communication quality monitoring device 21 according to the present disclosure estimates the causes of degradation of communication quality using a rule-based algorithm, which imposes a relatively light processing burden, before estimating the causes of degradation of communication quality using an estimation model constructed by machine learning, which imposes a relatively heavy processing burden. This allows the communication quality monitoring device 21 according to the present disclosure to quickly estimate the causes of degradation of communication quality between communication devices. Furthermore, by estimating the causes of degradation of communication quality using the communication quality monitoring device 21, appropriate measures can be taken to suppress degradation of communication quality. Such a communication quality monitoring device 21 can be applied to systems that require real-time performance.

Furthermore, due to the characteristics of machine learning, including deep learning, there is also the problem that when only estimating the factors of degradation of communication quality using an estimation model constructed by machine learning, the accuracy of the prediction deteriorates if the situation, environment, and time when the training data used for learning was created differ from those during actual operation. If the accuracy of the prediction deteriorates, maintenance such as re-learning becomes necessary, but there are many cases where maintenance cannot be easily performed in critical areas or fields that require urgency. In response to this, the communication quality monitoring device 21 disclosed herein is expected to accurately estimate the factors of degradation of communication quality by estimating the factors of degradation of communication quality using a rule-based algorithm before estimating the factors of degradation of communication quality using an estimation model constructed by machine learning.

Furthermore, the communication quality monitoring device 21 according to the present disclosure can not only detect interference waves but also estimate the type of interference waves. This makes it possible to deal with the interference waves according to their type, for example, by taking appropriate measures to suppress deterioration of communication quality, or, if the interference waves are jamming waves, by taking appropriate measures to prevent communication disruption caused by the jamming waves.

<Third embodiment>
FIG. 8 is a block diagram showing an example of the configuration of an interference wave analysis system 3 provided with an interference wave analysis device according to the present disclosure.

As shown in FIG. 8, compared to interference wave analysis system 1, interference wave analysis system 3 has interference wave analysis device 31 instead of interference wave analysis device 11.

The interference wave analysis device 31 is a device that analyzes interference waves that interfere with communication radio waves used for wireless communication between the communication devices 12_1 to 12_2. By estimating the type of interference wave using the interference wave analysis device 31, it becomes possible to deal with the interference wave according to the type of interference wave, such as taking appropriate measures to suppress deterioration of communication quality, or taking appropriate measures to prevent communication disruption due to the interference wave when the interference wave is a jamming wave. The interference wave analysis device 31 may be mounted on any of the communication devices 12_1 to 12_2, or may be provided separately from the communication devices 12_1 to 12_2.

Specifically, the interference wave analysis device 31 includes a receiving unit 311, an interference wave estimation unit 312, and an output unit 313.

The receiver 311 receives radio waves including communication radio waves used for wireless communication between the communication devices 12_1 and 12_2 and interference waves that interfere with the communication radio waves. The interference wave estimation unit 312 estimates the type of interference wave based on the reception timing, continuous reception time, and reception level of each of the received communication radio waves and interference waves, as well as the presence or absence of a unique word. Details of the method of estimating the type of interference wave by the interference wave analysis device 11 will be described later.

The output unit 313 outputs the estimation result by the interference wave estimation unit 312. For example, the output unit 313 displays information on the type of interference wave estimated by the interference wave estimation unit 312 on a monitor or the like.

Next, the operation of the interference wave analysis device 31 will be described. Figure 9 is a flowchart showing the operation of the interference wave analysis device 31. The processing of steps S101 to S110 shown in Figure 9 is basically the same as the processing of steps S101 to S110 shown in Figure 2. A specific description will be given below.

First, the interference wave analysis device 31 receives radio waves including communication radio waves used for wireless communication between the communication devices 12_1 and 12_2 and interference waves that interfere with the communication radio waves (step S101).

Then, the interference wave analysis device 31 determines whether the continuous reception time of the interference wave and the continuous reception time of the communication radio wave match (step S102). If the difference between the continuous reception time of the interference wave and the continuous reception time of the communication radio wave is within the allowable error range (first predetermined range), the interference wave analysis device 31 determines that the continuous reception time of the interference wave and the continuous reception time of the communication radio wave match.

For example, if the continuous reception time of the interference wave and the continuous reception time of the communication radio wave match (YES in step S102), the interference wave analysis device 31 then determines whether the reception timing of the interference wave and the reception timing of the communication radio wave match (step S103). Note that if the difference between the reception timing of the interference wave and the reception timing of the communication radio wave is within a second predetermined range, which is an allowable error range, the interference wave analysis device 31 determines that the reception timing of the interference wave and the reception timing of the communication radio wave match.

For example, if the timing of receiving the interference wave coincides with the timing of receiving the communication radio wave (YES in step S103), the interference wave analysis device 31 then determines whether or not at least one of the timing and frequency of receiving the interference wave changes in accordance with an intentional change in at least one of the timing and frequency of receiving the communication radio wave (step S104). Note that an intentional change in at least one of the timing and frequency of receiving the communication radio wave means an intentional change in at least one of the timing and frequency of transmitting the communication radio wave by a communication device that transmits the communication radio wave among the communication devices 12_1 to 12_2.

For example, if at least one of the reception timing and frequency of the interference wave changes in accordance with an intentional change in at least one of the reception timing and frequency of the communication radio wave (YES in step S104), the interference wave analysis device 31 estimates that this interference wave is caused by repeater interference (step S105) and outputs the estimation result (step S110).

In contrast, if neither the reception timing nor the frequency of the interference wave changes in accordance with any intentional change in the reception timing or frequency of the communication radio waves (NO in step S104), the interference wave analyzer 31 estimates that the interference wave is caused by the communication radio waves in use and is not an external jamming wave (step S106), and outputs the estimation result (step S110).

Also, in the processing of step S103, even if the timing of receiving the interference wave does not match the timing of receiving the communication radio wave (NO in step S103), the interference wave analyzer 31 estimates that the interference wave is caused by the communication radio wave in use and is not an external jamming wave (step S106), and outputs the estimation result (step S110).

Even if the continuous reception time of the interference wave does not match the continuous reception time of the communication radio wave in the processing of step S102 (NO in step S102), this interference wave may be caused by friendly communication radio waves (electromagnetic waves from a registered radio device), so the interference wave analysis device 31 next determines whether or not the radio waves that form the interference wave contain a unique word (step S201).

A unique word is a character string whose sequence does not appear in information signals, and which is intentionally included in communication radio waves in order to detect the synchronization position. The presence or absence of a unique word makes it possible to determine whether interference waves are caused by friendly communication radio waves (electromagnetic waves from a registered radio). However, the possibility of interference from copying the unique word must also be taken into consideration. The unique word employs a modulation and detection method that is more resistant to interference waves than payload data, so it is possible to detect the unique word even when there is interference.

For example, if a unique word is detected from the radio waves that form the interference waves (YES in step S201), there is a possibility of interference with the unique word being copied, so the interference wave analysis device 31 then determines whether or not at least one of the reception timing and frequency of the interference waves changes in accordance with an intentional change in at least one of the reception timing and frequency of the communication radio waves (step S104).

For example, if at least one of the reception timing and frequency of the interference wave changes in accordance with an intentional change in at least one of the reception timing and frequency of the communication radio wave (YES in step S104), the interference wave analysis device 31 estimates that this interference wave is caused by repeater interference after the unique word has been copied (step S105) and outputs the estimation result (step S110).

In contrast, if neither the reception timing nor the frequency of the interference wave changes in accordance with any intentional change in the reception timing or frequency of the communication radio wave (NO in step S104), the interference wave analyzer 31 infers that the interference wave is caused by the communication radio wave in use (i.e., friendly communication radio wave) and is not an external jamming wave (step S106), and outputs the inferred result (step S110).

Furthermore, in the processing of step S201, if a unique word is not detected from the radio waves forming the interference waves (NO in step S201), the interference wave analysis device 31 determines that the interference waves are not caused by friendly communication radio waves (electromagnetic waves from a registered radio). Thereafter, the interference wave analysis device 31 determines whether the radio waves forming the interference waves show a reception level above a threshold level in a frequency range above a predetermined frequency range (step S107). In other words, the interference wave analysis device 31 determines whether the radio waves forming the interference waves show a wide frequency range that includes communication radio waves and a large reception level.

For example, if the radio waves forming the interference waves show a reception level above a threshold level in a frequency range above a predetermined frequency range (YES in step S107), the interference wave analysis device 31 estimates that the interference waves are caused by coverage interference (step S108) and outputs the estimation result (step S110).

In contrast, if the radio waves forming the interference waves do not show a reception level above the threshold level in a frequency range above the specified frequency range (NO in step S107), the interference wave analyzer 31 estimates that the interference waves are caused by other communication radio waves and are not jamming waves from outside (step S109), and outputs the estimation result (step S110).

In this way, the interference wave analysis device 31 according to the present disclosure can not only detect interference waves, but also estimate the type of interference wave. This makes it possible to deal with the interference wave according to its type, for example, by taking appropriate measures to suppress deterioration of communication quality, or, if the interference wave is a jamming wave, by taking appropriate measures to prevent communication disruption caused by the jamming wave.

In addition, the interference wave for which the presence or absence of a unique word has been determined by the interference wave analysis device 31 may be stored as electromagnetic wave information in a storage unit (not shown).

FIG. 10 is a diagram showing an example of electromagnetic wave information stored by an interference wave analysis device according to the present disclosure. In FIG. 10, the registration flag "registered" indicates that a unique word has been detected, and the registration flag "not registered" indicates that a unique word has not been detected.

In the example of FIG. 10, first, as the first electromagnetic wave information, information on an interference wave with a frequency of "a", a reception level of "aaa", and a registration flag of "registered" is stored. This interference wave stored as the first electromagnetic wave information is determined to be caused by the communication radio waves of radios A and B, which are our (our) communication devices (corresponding to the processing of step S106). Furthermore, as the second electromagnetic wave information, information on an interference wave with a frequency of "b", a reception level of "bbb", and a registration flag of "registered" is stored. This interference wave stored as the second electromagnetic wave information is determined to be caused by the communication radio waves of radios A and B, which are our (our) communication devices (corresponding to the processing of step S106). Furthermore, as the third electromagnetic wave information, information on an interference wave with a frequency of "c", a reception level of "ccc", and a registration flag of "not registered" is stored. This interference wave stored as the third electromagnetic wave information is determined to be caused by cover interference (corresponding to the processing of step S108). Furthermore, as the fourth electromagnetic wave information, information on interference waves with a frequency of "d", a reception level of "ddd", and a registration flag of "not registered" is stored. This interference wave stored as the fourth electromagnetic wave information is determined to be caused by communication radio waves from another communication device (corresponding to the processing of step S109). Furthermore, as the fifth electromagnetic wave information, information on interference waves with a frequency of "e", a reception level of "eee", and a registration flag of "registered" is stored. This interference wave stored as the fifth electromagnetic wave information is determined to be caused by repeater interference after a unique word (UW) has been duplicated (corresponding to the processing of step S105).

The interference wave analysis device 31 can perform effective wireless communication that is less susceptible to interference by switching communication parameters based on accumulated electromagnetic wave information such as that shown in the example of FIG. 10.

Note that although the communication quality monitoring device 21 has been described as having the interference wave analysis function of the interference wave analysis device 11, this is not limited to the above example. For example, the communication quality monitoring device 21 may have the interference wave analysis function of the interference wave analysis device 31 instead of the interference wave analysis function of the interference wave analysis device 11.

(Hardware configuration for realizing the interference wave analysis function of the interference wave analysis devices 11 and 31)
The interference wave analysis process realized by the interference wave analysis device 11 can be realized by a general-purpose computer system. A brief explanation will be given below. Note that, although the case where the interference wave analysis process realized by the interference wave analysis device 11 is realized by a general-purpose computer system will be described below, the same can be said for the case where the interference wave analysis process realized by the interference wave analysis device 31 is realized by a general-purpose computer system.

Figure 11 is a block diagram showing an example of a hardware configuration that realizes the interference wave analysis function of the interference wave analysis device 11. The computer 300, for example, comprises a CPU (Central Processing Unit) 301, which is a control device, a RAM (Random Access Memory) 302, and a ROM (Read Only Memory) 303. The computer 300 further comprises an IF (Interface) 304, which is an interface with the outside, and a HDD (Hard Disk Drive) 305, which is an example of a non-volatile storage device. Furthermore, the computer 300 may also comprise input devices such as a keyboard and a mouse, and a display device such as a display, as other components not shown.

The HDD 305 stores an OS (Operating System) (not shown) and an interference wave analysis program 306. The interference wave analysis program 306 is a computer program that implements the interference wave analysis process of the interference wave analysis device 11.

The CPU 301 controls various processes in the computer 300, and access to the RAM 302, ROM 303, IF 304, and HDD 305. In the computer 300, the CPU 301 reads and executes the OS and interference wave analysis program 306 stored in the HDD 305. In this way, the computer 300 realizes the interference wave analysis function of the interference wave analysis device 11.

(Hardware configuration for realizing the communication quality monitoring function of the communication quality monitoring device 21)
Similarly, the communication quality monitoring process performed by the communication quality monitoring device 21 can be realized by a general-purpose computer system, which will be briefly described below.

FIG. 12 is a block diagram showing an example of a hardware configuration for realizing the communication quality monitoring function of the communication quality monitoring device 21. In addition to an interference wave analysis program 306, a communication quality monitoring program 307 is stored in the HDD 305. The communication quality monitoring program 307 is a computer program that implements the communication quality monitoring process of the communication quality monitoring device 21. In the computer 300, the CPU 301 reads and executes the OS and communication quality monitoring program 307 stored in the HDD 305. In this way, the computer 300 realizes the communication quality monitoring function of the communication quality monitoring device 21.

These programs described above include instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more functions described in this disclosure. The programs may be stored on a non-transitory computer-readable medium or tangible storage medium. By way of example and not limitation, computer-readable media or tangible storage media include RAM, ROM, flash memory, Solid-State Drive (SSD) or other memory technology, CD-ROM, Digital Versatile Disc (DVD), Blu-ray (registered trademark) disk or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices. The programs may be transmitted on a transitory computer-readable medium or communication medium. By way of example and not limitation, transitory computer-readable media or communication media include electrical, optical, acoustic, or other forms of propagated signals.

The present disclosure has been described above with reference to the embodiments, but the present disclosure is not limited to the above-mentioned embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

The drawings are merely examples for describing one or more embodiments. Each drawing may relate not only to one particular embodiment, but also to one or more other embodiments. As will be appreciated by those skilled in the art, various features or steps described with reference to any one drawing may be combined with features or steps shown in one or more other figures to create, for example, an embodiment not explicitly shown or described. Not all features or steps shown in any one drawing are necessarily required to describe an exemplary embodiment, and some features or steps may be omitted. The order of steps described in any drawing may be changed as appropriate.

A part or all of the above embodiments can be described as follows, but is not limited to the following:

(Appendix 1)
a receiving unit that receives a communication radio wave used for wireless communication between a plurality of communication devices and an interference wave that interferes with the communication radio wave;
an estimation unit that estimates a type of the interference wave based on reception timings, continuous reception times, and reception levels of the communication radio wave and the interference wave;
an output unit that outputs an estimation result by the estimation unit;
Equipped with
Interference wave analysis device.

(Appendix 2)
When a difference between the continuous reception time of the communication radio wave and the continuous reception time of the interference wave is within a first predetermined range, and when a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is within a second predetermined range, the estimation unit estimates a type of the interference wave based on whether or not at least one of the reception timing and the frequency of the interference wave changes following a change in at least one of the reception timing and the frequency of the communication radio wave.
2. An interference wave analysis device as described in appendix 1.

(Appendix 3)
The estimation unit estimates that the interference wave is caused by repeater interference when at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave, and estimates that the interference wave is caused by a communication radio wave in use when neither the reception timing nor the frequency of the interference wave changes following a change in either the reception timing or the frequency of the communication radio wave.
3. An interference wave analysis device as described in appendix 2.

(Appendix 4)
When a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is within a first predetermined range, and a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is outside a second predetermined range, the estimation unit estimates that the interference wave is caused by the communication radio wave in use.
2. An interference wave analysis device as described in appendix 1.

(Appendix 5)
When a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range, the estimation unit estimates a type of the interference wave based on whether or not the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range.
2. An interference wave analysis device as described in appendix 1.

(Appendix 6)
The estimation unit estimates that the interference wave is caused by coverage interference when the radio waves forming the interference wave show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range, and estimates that the interference wave is caused by other communication radio waves when the radio waves forming the interference wave do not show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than the predetermined frequency range.
6. An interference wave analysis device as described in appendix 5.

(Appendix 7)
the estimation unit is configured to estimate a type of the interference wave based on whether or not a unique word is included in the radio wave forming the interference wave in addition to the reception timing, continuous reception time, and reception level of each of the communication radio wave and the interference wave.
2. An interference wave analysis device as described in appendix 1.

(Appendix 8)
When a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range and when a unique word is included in the radio wave forming the interference wave, the estimation unit estimates a type of the interference wave based on whether or not at least one of a reception timing and a frequency of the interference wave changes following a change in at least one of a reception timing and a frequency of the communication radio wave.
8. An interference wave analysis device according to claim 7.

(Appendix 9)
The estimation unit estimates that the interference wave is caused by repeater interference when at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave, and estimates that the interference wave is caused by a communication radio wave in use when neither the reception timing nor the frequency of the interference wave changes following a change in either the reception timing or the frequency of the communication radio wave.
9. An interference wave analysis device according to claim 8.

(Appendix 10)
When a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range, and when a unique word is not included in the radio wave forming the interference wave, the estimation unit estimates a type of the interference wave based on whether or not the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range.
8. An interference wave analysis device according to claim 7.

(Appendix 11)
The estimation unit estimates that the interference wave is caused by coverage interference when the radio waves forming the interference wave show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range, and estimates that the interference wave is caused by other communication radio waves when the radio waves forming the interference wave do not show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than the predetermined frequency range.
11. An interference wave analysis apparatus according to claim 10.

(Appendix 12)
The plurality of communication devices that wirelessly communicate with each other;
An interference wave analysis device according to claim 1;
An interference wave analysis system comprising:

(Appendix 13)
The interference wave analysis device is provided in any one of the plurality of communication devices.
13. An interference wave analysis system as described in appendix 12.

(Appendix 14)
The computer
receiving communication radio waves used for wireless communication between a plurality of communication devices and interference waves interfering with the communication radio waves;
Estimating a type of the interference wave based on a reception timing, a continuous reception time, and a reception level of each of the communication radio wave and the interference wave;
Output the estimation results,
Interference wave analysis method.

(Appendix 15)
In estimating the type of the interference wave, if a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is within a first predetermined range, and if a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is within a second predetermined range, the type of the interference wave is estimated based on whether or not at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave.
15. The interference wave analysis method according to claim 14.

(Appendix 16)
In estimating the type of interference wave, if at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave, it is estimated that the interference wave is caused by repeater interference, and if neither the reception timing nor the frequency of the interference wave changes following a change in either the reception timing or the frequency of the communication radio wave, it is estimated that the interference wave is caused by a communication radio wave in use.
16. The interference wave analysis method according to claim 15.

(Appendix 17)
In estimating the type of interference wave, if a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is within a first predetermined range, and if a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is outside a second predetermined range, it is estimated that the interference wave is caused by a communication radio wave in use.
15. The interference wave analysis method according to claim 14.

(Appendix 18)
In estimating the type of the interference wave, if a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range, the type of the interference wave is estimated based on whether or not the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range.
15. The interference wave analysis method according to claim 14.

(Appendix 19)
In estimating the type of the interference wave, if the radio waves forming the interference wave show a reception level equal to or above a threshold level in a frequency range equal to or above a predetermined frequency range, it is estimated that the interference wave is caused by coverage interference, and if the radio waves forming the interference wave do not show a reception level equal to or above a threshold level in a frequency range equal to or above the predetermined frequency range, it is estimated that the interference wave is caused by radio waves for other communication.
19. The interference wave analysis method according to claim 18.

(Appendix 20)
In estimating the type of the interference wave, the type of the interference wave is estimated based on whether or not a unique word is included in the radio waves forming the interference wave, in addition to the reception timing, continuous reception time, and reception level of each of the communication radio wave and the interference wave.
15. The interference wave analysis method according to claim 14.

(Appendix 21)
A process of receiving a communication radio wave used for wireless communication between a plurality of communication devices and an interference wave interfering with the communication radio wave;
A process of estimating a type of the interference wave based on reception timings, continuous reception times, and reception levels of the communication radio wave and the interference wave, respectively;
A process of outputting the estimation result;
An interference wave analysis program that causes a computer to execute the above.

(Appendix 22)
In the process of estimating the type of the interference wave, if a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is within a first predetermined range, and if a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is within a second predetermined range, the type of the interference wave is estimated based on whether or not at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave.
22. The interference wave analysis program according to claim 21.

(Appendix 23)
In the process of estimating the type of interference wave, if at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave, it is estimated that the interference wave is caused by repeater interference, and if neither the reception timing nor the frequency of the interference wave changes following a change in either the reception timing or the frequency of the communication radio wave, it is estimated that the interference wave is caused by a communication radio wave in use.
23. The interference wave analysis program according to claim 22.

(Appendix 24)
In the process of estimating the type of interference wave, if a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is within a first predetermined range, and if a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is outside a second predetermined range, it is estimated that the interference wave is caused by a communication radio wave in use.
22. The interference wave analysis program according to claim 21.

(Appendix 25)
In the process of estimating the type of the interference wave, when a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range, the type of the interference wave is estimated based on whether or not the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range.
22. The interference wave analysis program according to claim 21.

(Appendix 26)
In the process of estimating the type of interference wave, if the radio waves forming the interference wave show a reception level above a threshold level in a frequency range above a predetermined frequency range, it is estimated that the interference wave is caused by coverage interference, and if the radio waves forming the interference wave do not show a reception level above a threshold level in a frequency range above the predetermined frequency range, it is estimated that the interference wave is caused by other communication radio waves.
26. The interference wave analysis program according to claim 25.

(Appendix 27)
In the process of estimating the type of the interference wave, a computer is caused to execute a process of estimating the type of the interference wave based on whether or not a unique word is included in the radio waves forming the interference wave in addition to the reception timing, continuous reception time, and reception level of each of the communication radio wave and the interference wave.
22. The interference wave analysis program according to claim 21.

Some or all of the elements (e.g., configurations and functions) described in Supplementary Notes 8 to 11 that are dependent on Supplementary Note 7 may also be dependent on Supplementary Notes 20 and 27 in a similar dependent relationship to Supplementary Notes 8 to 11. Some or all of the elements described in any of the supplementary notes may be applied to various hardware, software, recording means for recording software, systems, and methods.

This application claims priority from Japanese Patent Application No. 2023-114073, filed on July 11, 2023, and Japanese Patent Application No. 2024-77842, filed on May 13, 2024, the disclosures of which are incorporated herein in their entirety.

REFERENCE SIGNS LIST 1 Interference wave analysis system 2 Communication quality monitoring system 3 Interference wave analysis system 11 Interference wave analysis device 12_1 Communication device 12_2 Communication device 21 Communication quality monitoring device 31 Interference wave analysis device 111 Receiving unit 112 Interference wave estimation unit 113 Output unit 211 Radio wave receiving unit 212 First factor estimation unit 213 Second factor estimation unit 214 Interference wave analysis unit 215 Monitoring result output unit 300 Computer 301 CPU
302 RAM
303 ROM
304 IF
305 HDD
306 Interference wave analysis program 307 Communication quality monitoring program 311 Receiving unit 312 Interference wave estimation unit 313 Output unit

Claims (20)

A receiving means for receiving a communication radio wave used for wireless communication between a plurality of communication devices and an interference wave interfering with the communication radio wave;
an estimation means for estimating a type of the interference wave based on reception timings, continuous reception times, and reception levels of the communication radio wave and the interference wave;
an output means for outputting an estimation result by the estimation means;
Equipped with
Interference wave analysis device. When a difference between the continuous reception time of the communication radio wave and the continuous reception time of the interference wave is within a first predetermined range, and when a difference between the reception timing of the communication radio wave and the reception timing of the interference wave is within a second predetermined range, the estimation means estimates a type of the interference wave based on whether or not at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave.
The interference wave analysis device according to claim 1 . The estimation means estimates that the interference wave is caused by repeater interference when at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave, and estimates that the interference wave is caused by a communication radio wave in use when neither the reception timing nor the frequency of the interference wave changes following a change in either the reception timing or the frequency of the communication radio wave.
The interference wave analyzing device according to claim 2 . When a difference between the continuous reception time of the communication radio wave and the continuous reception time of the interference wave is within a first predetermined range, and when a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is outside a second predetermined range, the estimation means estimates that the interference wave is caused by the communication radio wave in use.
The interference wave analysis device according to claim 1 . When a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range, the estimation means estimates a type of the interference wave based on whether or not the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range.
The interference wave analysis device according to claim 1 . The estimation means estimates that the interference wave is caused by coverage interference when the radio waves forming the interference wave show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range, and estimates that the interference wave is caused by other communication radio waves when the radio waves forming the interference wave do not show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than the predetermined frequency range.
The interference wave analyzing device according to claim 5 . the estimation means is configured to estimate the type of the interference wave based on whether or not a unique word is included in the radio wave forming the interference wave in addition to the reception timing, continuous reception time, and reception level of each of the communication radio wave and the interference wave.
The interference wave analysis device according to claim 1 . When a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range, and when a unique word is included in the radio wave forming the interference wave, the estimation means estimates a type of the interference wave based on whether or not at least one of a reception timing and a frequency of the interference wave changes following a change in at least one of a reception timing and a frequency of the communication radio wave.
An interference wave analyzing device according to claim 7. The estimation means estimates that the interference wave is caused by repeater interference when at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave, and estimates that the interference wave is caused by a communication radio wave in use when neither the reception timing nor the frequency of the interference wave changes following a change in either the reception timing or the frequency of the communication radio wave.
The interference wave analyzing device according to claim 8. When a difference between the continuous reception time of the communication radio wave and the continuous reception time of the interference wave is outside a first predetermined range, and when the radio wave forming the interference wave does not include a unique word, the estimation means estimates the type of the interference wave based on whether or not the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range.
An interference wave analyzing device according to claim 7. The estimation means estimates that the interference wave is caused by coverage interference when the radio waves forming the interference wave show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range, and estimates that the interference wave is caused by other communication radio waves when the radio waves forming the interference wave do not show a reception level equal to or higher than a threshold level in a frequency range equal to or higher than the predetermined frequency range.
The interference wave analyzing device according to claim 10. The plurality of communication devices that wirelessly communicate with each other;
The interference wave analysis device according to claim 1 ;
An interference wave analysis system comprising: The interference wave analysis device is provided in any one of the plurality of communication devices.
The interference wave analysis system according to claim 12. The computer
receiving communication radio waves used for wireless communication between a plurality of communication devices and interference waves interfering with the communication radio waves;
Estimating a type of the interference wave based on a reception timing, a continuous reception time, and a reception level of each of the communication radio wave and the interference wave;
Output the estimation results,
Interference wave analysis method. In estimating the type of the interference wave, the type of the interference wave is estimated based on whether or not a unique word is included in the radio waves forming the interference wave, in addition to the reception timing, continuous reception time, and reception level of each of the communication radio wave and the interference wave.
The interference wave analysis method according to claim 14.


In estimating the type of interference wave, if at least one of the reception timing and frequency of the interference wave changes following a change in at least one of the reception timing and frequency of the communication radio wave, it is estimated that the interference wave is caused by repeater interference, and if neither the reception timing nor the frequency of the interference wave changes following a change in either the reception timing or the frequency of the communication radio wave, it is estimated that the interference wave is caused by a communication radio wave in use.
The interference wave analysis method according to claim 15. In estimating the type of interference wave, if a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is within a first predetermined range, and if a difference between a reception timing of the communication radio wave and a reception timing of the interference wave is outside a second predetermined range, it is estimated that the interference wave is caused by a communication radio wave in use.
The interference wave analysis method according to claim 14. In estimating the type of the interference wave, if a difference between a continuous reception time of the communication radio wave and a continuous reception time of the interference wave is outside a first predetermined range, the type of the interference wave is estimated based on whether or not the radio wave forming the interference wave exhibits a reception level equal to or higher than a threshold level in a frequency range equal to or higher than a predetermined frequency range.
The interference wave analysis method according to claim 14. A process of receiving a communication radio wave used for wireless communication between a plurality of communication devices and an interference wave interfering with the communication radio wave;
A process of estimating a type of the interference wave based on reception timings, continuous reception times, and reception levels of the communication radio wave and the interference wave, respectively;
A process of outputting the estimation result;
An interference wave analysis program that causes a computer to execute the above. In the process of estimating the type of the interference wave, a computer is caused to execute a process of estimating the type of the interference wave based on whether or not a unique word is included in the radio waves forming the interference wave in addition to the reception timing, continuous reception time, and reception level of each of the communication radio wave and the interference wave.
The interference wave analysis program according to claim 19.

Images