JP2020057848A - Interference adjustment device, interference adjustment method, and program - Google Patents

Abstract

To improve the frequency utilization efficiency while reducing the occurrence of interference.SOLUTION: An interference adjustment device includes an acquisition unit that acquires interference area information including information based on a planned movement route and a planned movement speed of a mobile communication device, and indicating an interference area generated by wireless communication of the mobile communication device, an interference adjustment target area calculation unit that calculates an interference adjustment target area associated with the movement of the mobile communication device, on the basis of the interference area information acquired by the acquisition unit, a communication device that performs wireless communication in an interference adjustment target area calculated by the interference adjustment target area calculation unit, and an interference reduction instruction output unit that outputs an interference reduction instruction that reduces interference in wireless communication with the mobile communication device.SELECTED DRAWING: Figure 1

Description

  An embodiment of the present invention relates to an interference adjustment device, an interference adjustment method, and a program.

  In order to make effective use of frequency resources, other users (secondary use systems; interfering systems) affect the primary users in the frequency band allocated to broadcasting and the like (primary use system; existing system). Practical use of a technology that shares a frequency (for example, white space) of an available channel that can be used without any problem or a frequency of the same channel (for example, white space) that has a sufficiently small effect on the primary usage system is being studied. With respect to this frequency sharing technology, a technology for evaluating interference is disclosed (for example, see Patent Document 1).

JP 2015-207836 A

  However, in the conventional frequency sharing, there is a problem that the frequency sharing restriction on the interfering system is relatively large in order to reduce the occurrence of interference, and the frequency use efficiency cannot be improved.

  An object of the present invention is to improve the frequency use efficiency while reducing the occurrence of interference.

  An embodiment of the present invention includes an acquisition unit that includes information based on a planned movement route and a planned movement speed of the mobile communication device, and obtains interference area information indicating an interference area generated by wireless communication of the mobile communication device, An interference adjustment target area calculation unit that calculates an interference adjustment target area accompanying the movement of the mobile communication device based on the interference area information acquired by the acquisition unit, and the interference calculated by the interference adjustment target area calculation unit. An interference adjustment device comprising: a communication device that performs wireless communication in an adjustment target area; and an interference reduction instruction output unit that outputs an interference reduction instruction for reducing interference of wireless communication with the mobile communication device.

  In the interference adjustment device according to an embodiment of the present invention, the interference adjustment target area calculation unit calculates, as the interference adjustment target area, an area having a size corresponding to an elapsed time from a start of movement of the mobile communication device.

  In the interference adjustment device according to one embodiment of the present invention, the interference adjustment target area calculation unit calculates, as the interference adjustment target area, a plurality of areas each corresponding to an elapsed time from the start of movement of the mobile communication device. .

  In the interference adjustment device according to an embodiment of the present invention, the interference adjustment target area calculation unit increases the area of an area more distant from a start point of the planned movement route among the plurality of areas, Calculate the interference adjustment target area.

  In the interference adjustment device of one embodiment of the present invention, the interference reduction instruction output unit, among the plurality of areas, further reduces the degree of interference with respect to an area further away from the starting point of the scheduled movement route, And outputting the interference reduction instruction.

  In the interference adjustment apparatus according to one embodiment of the present invention, a position information acquisition unit that acquires position information indicating a position of the mobile communication device, and a movement state of an interference area indicated by the interference area information acquired by the acquisition unit. And a detecting unit that detects a deviation from a moving state of the applied interference area based on the position information acquired by the position information acquiring unit, wherein the interference adjustment target area calculating unit detects the detection by the detecting unit. The interference adjustment target area is calculated based on the shift of the moving state.

  In the interference adjustment device according to one embodiment of the present invention, the interference adjustment target area calculation unit is a reference of an allowable interference amount in the interference adjustment target area based on a shift of a movement situation detected by the detection unit. Change interference protection standards.

  One embodiment of the present invention provides an acquisition method in which a computer includes information based on a planned movement path and a planned movement speed of a mobile communication device, and obtains interference area information indicating an interference region caused by wireless communication of the mobile communication device. In the step, based on the interference area information obtained in the obtaining step, based on the interference adjustment target area calculation step of calculating an interference adjustment target area accompanying the movement of the mobile communication device, in the interference adjustment target area calculation step An interference adjustment method comprising: a communication device that performs wireless communication in the calculated interference adjustment target area; and an interference reduction instruction output step that outputs an interference reduction instruction that reduces interference of wireless communication with the mobile communication device. .

  One embodiment of the present invention includes a computer of the interference coordinator including information based on a planned movement route and a planned movement speed of the mobile communication device, and providing interference area information indicating an interference region generated by wireless communication of the mobile communication device. An acquisition step of acquiring, an interference adjustment target area calculation step of calculating an interference adjustment target area accompanying the movement of the mobile communication device based on the interference area information acquired in the acquisition step, and the interference adjustment target area A communication device that performs wireless communication in the interference adjustment target area calculated in the calculation step, and an interference reduction instruction output step that outputs an interference reduction instruction that reduces interference of wireless communication with the mobile communication device. Program.

  According to the present invention, it is possible to provide an interference adjustment device, an interference adjustment method, and a program capable of further improving the frequency use efficiency while reducing the occurrence of interference.

FIG. 2 is a diagram illustrating an example of a functional configuration of the interference adjustment system according to the first embodiment. It is a figure showing an example of operation of an interference adjustment device of this embodiment. It is a figure showing an example of an interference area of this embodiment. It is a figure showing an example of an interference adjustment object area of this embodiment. It is a figure showing the modification of the interference adjustment object area which the interference adjustment object area calculation part of this embodiment calculates. It is a figure showing an example of functional composition of an interference adjustment system of a 2nd embodiment. It is a figure showing an example of operation of an interference adjustment system of this embodiment.

[First Embodiment]
Hereinafter, an outline of the interference adjustment system 1 of the present embodiment will be described with reference to the drawings.

[Functional Configuration of Interference Adjustment System 1]
FIG. 1 is a diagram illustrating an example of a functional configuration of an interference adjustment system 1 according to the present embodiment. The interference adjustment system 1 includes an interference adjustment device 10, an operation unit 20, and a presentation unit 30.
The operation unit 20 includes, for example, an operation device such as a keyboard and a touch panel, and receives an operation of an operator of the interference adjustment device 10. The operation unit 20 outputs information corresponding to the received operation to the interference adjustment device 10.
In an example of the present embodiment, the operation received by the operation unit 20 includes an operation of inputting the interference area information DIA. The interference area information DIA is information indicating an interference area IA caused by wireless communication of the mobile communication device MC. The interference area information DIA includes information based on the planned moving route CS and the planned moving speed VS of the mobile communication device MC.
In this example, the operation unit 20 outputs the interference area information DIA to the interference adjustment device 10.

The interference adjustment device 10 includes an acquisition unit 110, an interference adjustment target area calculation unit 120, and an interference reduction instruction output unit 130.
The acquiring unit 110 acquires the interference area information DIA. As described above, the interference area information DIA is information indicating the interference area IA generated by the wireless communication of the mobile communication device MC. The interference area information DIA includes information based on the planned moving route CS and the planned moving speed VS of the mobile communication device MC.
The acquisition unit 110 outputs the acquired interference area information DIA to the interference adjustment target area calculation unit 120.

  The interference adjustment target area calculation unit 120 calculates the interference adjustment target area TA accompanying the movement of the mobile communication device MC, based on the interference area information DIA acquired by the acquisition unit 110. The interference adjustment target area calculation unit 120 outputs information indicating the calculated interference adjustment target area TA (interference adjustment target area information DTA) to the interference reduction instruction output unit 130.

The interference reduction instruction output unit 130 outputs an interference reduction instruction for reducing interference of wireless communication between the communication device FC that performs wireless communication in the interference adjustment target area TA calculated by the interference adjustment target area calculation unit 120 and the mobile communication device MC. Generate an IR. In an example of the present embodiment, the interference reduction instruction output unit 130 outputs the generated interference reduction instruction IR to the presentation unit 30.
Note that the interference reduction instruction output unit 130 may directly output the interference reduction instruction IR to the communication device FC in addition to or instead of the presentation unit 30.

  The presentation unit 30 includes, for example, a display and a printer, and presents an interference reduction instruction IR output from the interference reduction instruction output unit 130 to the operator.

[Operation of Interference Adjusting Device 10]
Next, an example of the operation of the interference adjustment device 10 will be described with reference to FIG.
FIG. 2 is a diagram illustrating an example of the operation of the interference adjustment device 10 according to the present embodiment.
(Step S110) The acquisition unit 110 acquires the interference area information DIA. Here, an example of the interference area IA will be described with reference to FIG.

FIG. 3 is a diagram illustrating an example of the interference area IA according to the present embodiment. In this example, the mobile communication device MC is a communication device of a television relay wave provided in a mobile relay vehicle for television broadcasting (hereinafter, simply referred to as a relay vehicle BV).
In this example, the first relay van BV1 that moves in accordance with the movement of the leading (or leading group) competitor during the marathon competition, and the second relay car BV that moves in accordance with the movement of the second group of players in the marathon competition There is a second relay van BV2. Note that the relay van BV may include an n-th relay van BVn that moves in accordance with the movement of the n-th group (n is a natural number) competitors. Hereinafter, when the first relay vehicle BV1 to the n-th relay vehicle BVn are not individually distinguished, they will be simply referred to as the relay vehicle BV.

In this example, the relay van BV captures and collects sound while moving the competitor in accordance with the progress of the marathon competition, and places the captured image information and the collected sound information on a television relay wave to a television broadcasting station. Send.
Further, a wireless microphone (specific radio microphone) may be used in the relay truck BV. The wireless microphone (specific radio microphone) transmits the collected sound information to a receiver included in the relay vehicle BV by wireless communication.

  The frequency of the communication used in these relay vehicles BV is shared with the frequency of the communication wave of another communication device FC by the existing frequency sharing technology. When there is a communication device FC that shares the frequency used by the OB van BV, communication waves of the OB van BV and the communication device FC may interfere with each other. In this case, the communication device FC is instructed to take measures for interference reduction, such as suppression of transmission power, change of frequency, and change of directivity (beam shape), according to the moving route of the relay truck BV. The interference adjustment device 10 outputs an interference reduction instruction IR for instructing this interference reduction measure.

  Here, taking the above-mentioned marathon event as an example, the relay van BV that relays the marathon event moves along a predetermined marathon course (scheduled movement route CS). Further, the time for the relay vehicle BV to transmit the relay wave is from several tens of minutes to several minutes before the start of the competition to several minutes to several tens of seconds after the leading competitor finishes the goal (for example, 3 hours). is there.

In the case of this example, the predetermined area A including the planned moving route CS of the relay vehicle BV is set as the interference area IA, and the interference area IA is set in the entire period (for example, 3 hours) of the relay wave transmission time by the relay vehicle BV. If the entire IA is set as the target area of the interference reduction treatment (that is, the interference adjustment target area TA), it is possible to reduce the interference with the relay wave transmitted by the relay vehicle BV.
However, for example, in a marathon event, interference with the relay vehicle BV may occur only in the area A where the relay vehicle BV exists, that is, only a part of the entire interference area IA. For example, immediately after the start of the marathon competition, the relay van BV exists near the start point, so that there may be no interference with the relay van BV at an intermediate point such as a 10 km point or a 20 km point. That is, assuming that the entire interference area IA is the interference adjustment target area TA over the entire competition time (for example, 3 hours), it is possible to request the communication device FC which does not originally need the interference reduction measure to seek the interference reduction measure. Become. In this case, the degree of interference between the mobile communication device MC and the communication device FC can be reduced, but the frequency sharing efficiency is reduced.

  Therefore, the interference adjustment device 10 of the present embodiment increases the frequency sharing efficiency by setting the interference adjustment target area TA according to the moving route and the moving speed of the mobile communication device MC (for example, the relay truck BV). Reduce interference. Hereinafter, a procedure in which the interference adjustment device 10 sets the interference adjustment target area TA in accordance with the moving route and the moving speed of the mobile communication device MC will be described using the above-described marathon competition as an example.

  The interference area information DIA acquired by the acquisition unit 110 includes information based on the planned movement route CS and the planned movement speed VS of the mobile communication device MC. In this example, the planned movement route CS is a marathon course. The expected moving speed VS is an expected value of the moving speed of a competitor (or a group of competitors) in a marathon event.

(Step S120) The interference adjustment target area calculation unit 120 calculates the interference adjustment target area TA based on the provided interference area information DIA acquired by the acquisition unit 110. Here, an example of the interference adjustment target area TA calculated by the interference adjustment target area calculation unit 120 of the present embodiment will be described with reference to FIG.

FIG. 4 is a diagram illustrating an example of the interference adjustment target area TA according to the present embodiment. The interference adjustment target area calculation unit 120 calculates an interference adjustment target area TA along the planned movement route CS of the relay vehicle BV (mobile communication device MC). Here, the interference adjustment target area calculation unit 120 calculates an interval between the interference adjustment target areas TA based on the expected moving speed VS.
In the example shown in the figure, the interference adjustment target area calculation unit 120 calculates the interference adjustment target areas TA1 to the interference adjustment target area TAn along the planned movement path CS from the start position of the marathon event to the goal position. It should be noted that the illustration of the interference adjustment target area TAk + 1 to the interference adjustment target area TAn is omitted in FIG.

  The interference adjustment target area calculation unit 120 generates information (interference adjustment target area information DTA) indicating the interference adjustment target area TA for the interference adjustment target area TA calculated as described above, and generates the generated interference adjustment target area. Information DTA is output to interference reduction instruction output section 130.

[Modification Example of Interference Adjustment Target Area Calculation (1)]
FIG. 5 is a diagram illustrating a modified example of the interference adjustment target area TA calculated by the interference adjustment target area calculation unit 120 of the present embodiment. As shown in FIG. 5A, in the early stage of the marathon event (time t1), it is assumed that the first group and the second group are relatively close to each other, and the first relay vehicle BV1 and the second relay The distance d1 from the car BV2 is a short distance. On the other hand, at the end of the marathon event (time t2), it is assumed that the leading group and the second group are relatively far apart, and the distance d2 between the first relay vehicle BV1 and the second relay vehicle BV2 is This is a long distance compared to the distance d1.
As in this example, when there are a plurality of mobile communication devices MC (the relay truck BV), the distance between the mobile communication devices MC may change as time t elapses. In the case of this example, the interference adjustment target area calculation unit 120 calculates the width (for example, the radius r1) of the interference adjustment target area TA1 at the time t1 and the width (for example, the radius r2) of the interference adjustment target area TA2 at the time t2. Are made different from each other to calculate an interference adjustment target area TA.
That is, the interference adjustment target area calculation unit 120 calculates an area A having a size corresponding to the elapsed time ET from the start of movement of the mobile communication device MC as the interference adjustment target area TA.

In addition, the interference adjustment target area calculation unit 120 calculates the interference adjustment target area TA by increasing the area of the area A that is farther from the starting point of the planned movement route CS among the plurality of areas A.
In the case of the above-described example, the interference adjustment target area calculation unit 120 determines the size of the interference adjustment target area TA2 at time t2 (for example, the radius r2) and the size of the interference adjustment target area TA1 at time t1 (for example, the radius r1). ) Is calculated to be larger (larger) than the area TA).

[Modification (2) of Calculation of Interference Adjustment Target Area]
Further, when there are a plurality of mobile communication devices MC (broadcast trucks BV), the interference adjustment target area calculation unit 120 may change the area of the interference adjustment target area TA (or the interference adjustment target area). Instead of changing the size of TA), the number of interference adjustment target areas TA may be changed according to the number of mobile communication devices MC.
That is, the interference adjustment target area calculation unit 120 calculates the plurality of areas A corresponding to the elapsed time ET from the start of movement of the mobile communication device MC as the interference adjustment target area TA.

(Step S130) Returning to FIG. 2, the interference reduction instruction output unit 130 generates an interference reduction instruction IR based on the interference adjustment target area information DTA output from the interference adjustment target area calculation unit 120. The interference reduction instruction output unit 130 outputs the generated interference reduction instruction IR to the presentation unit 30 (or another device).

[Modified example of interference reduction instruction]
Note that the interference reduction instruction output unit 130 may output the interference reduction instruction IR by further reducing the degree of interference in the area A that is farther from the starting point of the planned movement route CS among the plurality of areas A. Good.
As an example, in the above-mentioned marathon competition, the first group may be more likely to be the subject (subject) of television broadcasting than the second group. For example, the first relay van BV1 corresponding to the head group (that is, the mobile communication device MC located in the area A farther from the starting point of the planned traveling route CS) has a higher broadcast priority. That is, when there are a plurality of relay vans BV, the broadcast priority may be different for each of the vans.
The interference reduction instruction output unit 130 generates an interference reduction instruction IR in which the degree of interference is further reduced in the area A where the high priority mobile communication device MC is present among the plurality of areas A.

When generating the transmission power reduction instruction as the interference reduction instruction IR, the interference reduction instruction output unit 130 reduces the transmission power in a stepwise manner (for example, a 1 dB reduction in the first step and a 2 dB reduction in the second step). May be generated.
Also, when there are a plurality of communication devices FC, the interference reduction instruction output unit 130 reduces the number of communication devices FC that reduce transmission power in a stepwise manner (for example, 10% of the number of communication devices FC as the first stage). Of the communication device FC, and as a second stage, the interference reduction instruction IR for reducing the communication device FC of 20% of the number of communication devices FC) may be generated.
In addition, when generating an instruction to change the beam directivity as the interference reduction instruction IR, the interference reduction instruction output unit 130 changes the beam direction in steps (for example, (π / 45) degrees as the first step). The interference reduction instruction IR that changes (changes by (2π / 45) degrees) as the second stage may be generated.

[Summary of First Embodiment]
As described above, in the interference adjustment device 10 of the present embodiment, the interference adjustment target area calculation unit 120 calculates the interference adjustment target area TA accompanying the movement of the mobile communication device MC based on the interference area information DIA. . The interference area information DIA includes information based on the planned movement route CS and the planned movement speed VS of the mobile communication device MC. Thus, the interference adjustment device 10 can calculate the interference adjustment target area TA in more detail in terms of range and time based on the planned movement route CS and the planned movement speed VS of the mobile communication device MC.
Therefore, according to the interference adjustment device 10 of the present embodiment, the area TA for which the interference is to be adjusted can be further limited in range and time, so that it is possible to further improve the frequency use efficiency while reducing the occurrence of interference. it can.

  Further, as described above, the interference adjustment target area calculation unit 120 of the present embodiment calculates an area A having a size corresponding to the elapsed time ET from the start of movement of the mobile communication device MC as the interference adjustment target area TA. According to the interference adjustment target area calculation unit 120 configured as described above, the range of the interference adjustment target area TA can be calculated in more detail according to the planned movement route CS and the planned movement speed VS of the mobile communication device MC. Therefore, it is possible to further improve the frequency use efficiency while reducing the occurrence of interference.

  Further, as described above, the interference adjustment target area calculation unit 120 of the present embodiment calculates a plurality of areas A corresponding to the elapsed time ET from the start of movement of the mobile communication device MC as the interference adjustment target area TA. I do. According to the interference adjustment target area calculation unit 120 configured as described above, the number of the interference adjustment target areas TA can be calculated in more detail according to the planned movement route CS and the planned movement speed VS of the mobile communication device MC. Therefore, it is possible to further improve the frequency use efficiency while reducing the occurrence of interference.

  Further, as described above, the interference adjustment target area calculation unit 120 according to the present embodiment increases the area of the area A farther from the starting point of the planned movement route CS among the plurality of areas, and performs the interference adjustment. The target area TA is calculated. According to the interference adjustment target area calculation unit 120 configured as described above, the range of the interference adjustment target area TA can be calculated in more detail according to the planned movement route CS and the planned movement speed VS of the mobile communication device MC. Therefore, it is possible to further improve the frequency use efficiency while reducing the occurrence of interference.

  Further, as described above, the interference reduction instruction output unit 130 of the present embodiment further reduces the degree of interference in the area A that is farther from the starting point of the planned movement route CS among the plurality of areas A, An interference reduction instruction IR is output. According to the interference reduction instruction output unit 130 of the present embodiment configured as described above, the degree of interference adjustment in the interference adjustment target area TA can be determined according to the priority between the plurality of mobile communication devices MC. . Therefore, according to the interference adjustment device 10 of the present embodiment, it is possible to further improve the frequency use efficiency while reducing the occurrence of interference.

[Second embodiment]
Hereinafter, an interference adjustment system 1a according to the second embodiment will be described with reference to FIGS. Note that the same components and operations as those of the interference adjustment system 1 of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 6 is a diagram illustrating an example of a functional configuration of the interference adjustment system 1a according to the second embodiment. The interference adjustment system 1a of the present embodiment is different from the interference adjustment system 1 of the first embodiment in that the interference adjustment device 10a includes a position information acquisition unit 140 and a detection unit 150.

The interference adjustment device 10a includes a position information acquisition unit 140 and a detection unit 150.
Position information acquiring section 140 acquires position information DLC indicating the position of mobile communication device MC. The position information DLC is information indicating the current position of the mobile communication device MC. The position information DLC is generated by a positioning function (for example, a GPS function) provided in the mobile communication device MC. The receiving unit 40 acquires the position information DLC from the mobile communication device MC, and outputs the acquired position information DLC to the position information acquiring unit 140. The position information acquisition unit 140 acquires the position information DLC from the reception unit 40. The position information acquisition unit 140 outputs the acquired position information DLC to the detection unit 150.
The detection unit 150 acquires the position information DLC output by the position information acquisition unit 140. The detecting unit 150 acquires the interference area information DIA output by the acquiring unit 110. The detection unit 150 detects a shift between the movement state of the interference area IA indicated by the interference area information DIA and the movement state of the interference area IA based on the position information DLC. That is, the detection unit 150 determines the movement state of the interference area IA expected before the start of the marathon competition, and the movement state of the interference area IA based on the actually measured position of the mobile communication device MC obtained after the start of the marathon competition. Detect the deviation. The detection unit 150 outputs information indicating the detected deviation to the interference adjustment target area calculation unit 120a as the movement situation detection result DF.
The interference adjustment target area calculation unit 120a calculates the interference adjustment target area TA based on the displacement of the movement situation detected by the detection unit 150 (movement situation detection result DF).

FIG. 7 is a diagram illustrating an example of an operation of the interference adjustment system 1a according to the present embodiment.
(Step S210) The acquisition unit 110 acquires the interference area information DIA from the presentation unit 30. The position information acquisition unit 140 acquires the position information DLC of the mobile communication device MC from the reception unit 40.
(Step S220) The detection unit 150 determines the interference adjustment target area TA indicated by the interference area information DIA acquired in step S210 (that is, the interference adjustment target area TA based on the planned movement route CS and the planned movement speed VS), and The difference from the interference adjustment target area TA indicated by the information DLC (that is, the interference adjustment target area TA based on the current position of the mobile communication device MC) is detected.

(Step S230) The detecting unit 150 determines whether or not the difference detected in step S220 exceeds a predetermined threshold. When determining that the detected difference exceeds the predetermined threshold (step S230; YES), detection unit 150 advances the process to step S240. If the detecting unit 150 determines that the detected difference does not exceed the predetermined threshold (step S230; NO), the process proceeds to step S120.

(Step S240) The interference adjustment target area calculation unit 120a calculates the interference adjustment target area TA taking into account the difference, based on the movement situation detection result DF indicating the shift of the movement situation detected by the detection unit 150.

Note that, in addition to the difference detection based on the position information DLC (or instead of the displacement detection based on the position information DLC), the detection unit 150 calculates the estimated interference amount in the interference adjustment target area TA and the actually measured interference amount. The difference may be detected based on the difference between.
In this case, detection section 150 detects a difference based on the difference between the allowable interference amount of mobile communication device MC and the actually measured interference amount. Alternatively, the detection unit 150 detects a difference based on a difference between the assumed amount of interference of the communication device FC and the actually measured amount of interference.

Also, it has been described that the interference adjustment target area calculation unit 120a calculates the interference adjustment target area TA based on the shift of the movement status detected by the detection unit 150 (movement status detection result DF) in step S240 described above. However, it is not limited to this. When the deviation of the moving state is detected, the interference adjustment target area calculation unit 120a sets the relaxation width of the interference protection reference of the mobile communication device MC according to the amount of the deviation of the moving state instead of the process of step S240. May be increased. Here, the interference protection criterion is a criterion for an allowable interference amount in the interference adjustment target area TA.
In this case, the degree of relaxation of the interference protection standard of the mobile communication device MC is predetermined in accordance with the amount of shift in the moving situation indicated by the moving situation detection result DF. For example, the relaxation width of the interference protection criterion is increased by 1 dB with respect to the predetermined interference protection criterion when the shift amount of the movement situation indicated by the movement situation detection result DF is relatively small (for example, level 1). In the case where the amount of the situation shift is relatively large (for example, level 2), it is predetermined to further increase by 1 dB with respect to a predetermined interference protection standard.
According to the interference adjustment device 10a configured as described above, the process of calculating the interference adjustment target area TA in consideration of the difference in step S240 can be omitted.

[Summary of Second Embodiment]
As described above, in the interference adjustment device 10a according to the present embodiment, the interference adjustment target area calculation unit 120a performs the interference adjustment based on the expected movement state of the interference area IA and the measured value of the position of the mobile communication device MC. An interference adjustment target area TA is calculated based on a deviation from the movement state of the area IA.
As described in the first embodiment, the interference adjustment device 10a can further limit the interference adjustment target area TA in a range and in time, thereby further improving the frequency use efficiency while reducing the occurrence of interference. Can be done.
On the other hand, in the case where the interference adjustment target area TA is further limited in terms of range and time, if a difference occurs between the predicted state of the movement state of the mobile communication device MC and the actual state, the calculated interference adjustment target area TA is determined. Outside the area TA, interference between the mobile communication device MC and the communication device FC may easily occur. In other words, when the granularity of the interference adjustment target area TA based on the prediction is set finer, the deviation between the interference adjustment target area TA based on the prediction and the area where interference actually occurs tends to be larger.
The interference adjustment device 10a calculates the interference adjustment target area TA in consideration of the actual situation when a deviation occurs between the predicted situation and the actual situation of the movement situation of the mobile communication device MC. It is possible to reduce a situation where interference between the mobile communication device MC and the communication device FC easily occurs outside the target area TA.

  The embodiments of the present invention and the modifications thereof have been described above. However, these embodiments and the modifications thereof have been presented as examples, and are not intended to limit the scope of the invention. These embodiments and their modifications can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

  Each of the above devices has a computer inside. The process of each process of each device described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by reading and executing the program by the computer. Here, the computer-readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to a computer via a communication line, and the computer that has received the distribution may execute the program.

Further, the program may be for realizing a part of the functions described above.
Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  1, 1a: interference adjustment system, 10, 10a: interference adjustment device, 110: acquisition unit, 120, 120a: interference adjustment target area calculation unit, 130: interference reduction instruction output unit, 140: position information acquisition unit, 150: detection Unit, 20 operation unit, 30 presentation unit, 40 reception unit, MC mobile communication device, FC communication device, CS scheduled movement route, VS scheduled movement speed, A area, IA interference interference area DIA: Interference area information, TA: Interference adjustment target area, DTA: Interference adjustment target area information, IR: Interference reduction instruction, ET: Elapsed time, DLC: Position information, DF: Movement status detection result, BV: Relay vehicle

Claims (9)

An acquisition unit that includes information based on a scheduled movement route and a scheduled movement speed of the mobile communication device, and obtains interference area information indicating an interference area generated by wireless communication of the mobile communication device,
Based on the interference area information obtained by the acquisition unit, an interference adjustment target area calculation unit that calculates an interference adjustment target area accompanying the movement of the mobile communication device,
A communication device that performs wireless communication in the interference adjustment target area calculated by the interference adjustment target area calculation unit, and an interference reduction instruction output unit that outputs an interference reduction instruction to reduce interference of wireless communication between the mobile communication device and ,
An interference adjustment device comprising: The interference adjustment target area calculation unit,
The interference adjustment device according to claim 1, wherein an area having a size corresponding to an elapsed time from a start of movement of the mobile communication device is calculated as the interference adjustment target area. The interference adjustment target area calculation unit,
The interference adjustment device according to claim 1, wherein a plurality of areas each corresponding to an elapsed time from a start of movement of the mobile communication device are calculated as the interference adjustment target areas. The interference adjustment target area calculation unit,
The interference adjustment device according to claim 3, wherein, among the plurality of areas, an area farther from a start point of the planned movement route is widened to calculate the interference adjustment target area. The interference reduction instruction output unit,
5. The interference adjustment device according to claim 3, wherein the interference adjustment device outputs the interference reduction instruction by further reducing the degree of interference in an area that is farther from the starting point of the planned movement route among the plurality of areas. . A position information acquisition unit that acquires position information indicating the position of the mobile communication device,
A movement state of the interference area indicated by the interference area information acquired by the acquisition unit, and a detection unit that detects a shift between the movement state of the interference area based on the position information acquired by the position information acquisition unit,
Further comprising
The interference adjustment target area calculation unit,
The interference adjustment device according to any one of claims 1 to 5, wherein the interference adjustment target area is calculated based on a shift in a moving state detected by the detection unit. The interference adjustment target area calculation unit,
The interference adjustment device according to claim 6, wherein an interference protection criterion, which is a criterion of an allowable amount of interference in the interference adjustment target area, is changed based on a shift of a movement situation detected by the detection unit. An acquisition step in which the computer includes information based on the planned movement route and the planned movement speed of the mobile communication device, and obtains interference area information indicating an interference area generated by wireless communication of the mobile communication device,
Computer, based on the interference area information obtained in the obtaining step, based on the interference adjustment target area calculation step of calculating an interference adjustment target area accompanying the movement of the mobile communication device,
A computer that outputs an interference reduction instruction to reduce interference of wireless communication between the communication device that performs wireless communication in the interference adjustment target area calculated in the interference adjustment target area calculation step and the mobile communication device, An instruction output step;
An interference adjustment method having: An acquisition step of acquiring interference area information indicating an interference area generated by wireless communication of the mobile communication apparatus, including information based on a planned movement path and a planned movement speed of the mobile communication apparatus in a computer of the interference adjustment apparatus;
An interference adjustment target area calculation step of calculating an interference adjustment target area accompanying the movement of the mobile communication device, based on the interference area information acquired in the acquisition step,
A communication device that performs wireless communication in the interference adjustment target area calculated in the interference adjustment target area calculation step, and an interference reduction instruction output step that outputs an interference reduction instruction to reduce interference of wireless communication between the mobile communication device and the communication device When,
A program for executing

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