Communication control device and communication control method

Abstract

When a communication device 100 determines, for starting communication between a vehicle and a vehicle-external base station 200, a frequency band for the communication between the vehicle and the vehicle external base station 200, the communication control device 100 measures or determines an amount of electromagnetic noise in each frequency band inside a cockpit module of the vehicle, sets the frequency band for the communication on the basis of the amount of electromagnetic noise, and communicates with the vehicle-external base station by using the set frequency band for the communication.

Description

[Technical Field]

[0001] The present invention relates to a communication control device and a communication control method. [Background technology]

[0002] 2. Description of the Related Art Vehicles capable of wireless communication with base stations have been developed.

[0003] For example, Patent Document 1 discloses a communication control method for switching to the communication frequency to be used in the next communication area by detecting the angle of the direction of arrival of radio waves received from a wireless base station antenna in a road-to-vehicle communication system in which different frequencies are used for each communication area. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3448651 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, in the prior art, a process for reducing the overall amount of noise has been carried out in order to improve the accuracy of communication with the wireless base station.

[0006] However, there is a problem in that the process of reducing the total amount of noise is a heavy load, and communication characteristics deteriorate due to the influence of parts of the noise that cannot be reduced even if an attempt is made to reduce the amount of noise.

[0007] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a communication control device and a communication control method that can improve communication quality in a vehicle capable of wireless communication with a base station without performing processing to reduce the overall amount of noise. The purpose is to provide [Means for solving the problem]

[0008] When starting communication between a vehicle and an exterior base station 200, a communication control device 100 according to one embodiment of the present invention determines the communication frequency band between the vehicle and the exterior base station 200 by measuring or determining the amount of electromagnetic noise in each frequency band within the cockpit module, setting the communication frequency band based on the amount of electromagnetic noise, and communicating with the exterior base station using the set communication frequency band. [Effects of the Invention]

[0009] According to the present invention, in a vehicle capable of wireless communication with a base station, communication quality can be improved without performing processing to reduce the overall amount of noise. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a communication control device 100. As shown in FIG. [Figure 2] FIG. 2 is a diagram showing the relative positions of the antenna 11 and electrical equipment 60 in the vehicle. [Figure 3] FIG. 3 is a diagram showing in-vehicle noise in the frequency band of standalone (SA) 5G communication. [Figure 4] FIG. 4 is a flowchart illustrating an example of processing according to the first embodiment. [Figure 5] FIG. 5 is a flowchart illustrating an example of processing according to the first embodiment. [Figure 6] FIG. 6 is a flowchart illustrating an example of processing according to the first embodiment. [Figure 7] FIG. 7 is a flowchart showing an example of processing according to the second embodiment. [Figure 8] FIG. 8 is a flowchart showing an example of processing according to the second embodiment. [Figure 9] FIG. 9 is a flowchart illustrating an example of processing according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings.

[0012] <1. Configuration> The configuration of a communication control device 100 according to this embodiment will be described with reference to FIGS.

[0013] The communication control device 100 is mounted on a vehicle. In this embodiment, the communication control device 100 controls communication between the vehicle and an exterior base station 200, as shown in Fig. 1 . In addition, in this embodiment, the communication control device 100 can be connected to electrical equipment 60 as an on-vehicle device, as shown in Fig. 1 . In other words, the communication control device 100 can be connected to a plurality of electrical equipment 60.

[0014] The communication control device 100 is connected to an antenna 11 for wireless communication with a base station 200. The wireless communication may be 5G (5th generation mobile communication system), Long Term Evolution (LTE, 4G), Wi-Fi, or the like. FIG. 2 is a diagram showing the relative positions of the antenna 11 and electrical components 60 in a vehicle. As shown in FIG. 2, the antenna 11 and the electrical components 60 that may be noise sources are laid out in a cockpit module (dashboard). As an example, the antenna 11-2 is placed right next to a head-up display (H / U display) 60-2, and is therefore susceptible to noise. Therefore, when performing 5G communication or the like, it is important to reduce the influence of noise while performing communication.

[0015] Here, Figure 3 shows the noise inside the vehicle in the frequency band of standalone (SA) 5G communication. The strong peaks seen in the noise concentration band indicate the amount of noise that increases when the vehicle or electrical equipment is turned on. As shown in Figure 3, it can be seen that noise generation is concentrated in a specific frequency band.

[0016] In this embodiment, communication with base station 200 is performed while avoiding such in-vehicle noise that occurs when the vehicle is ON or when the electrical equipment is ON. Therefore, in this embodiment, roughly divided into two types of embodiments, changing the clock frequency of the noise generating source and changing the communication frequency to a high frequency band with less noise, will be described, but these may be implemented either alone or in any combination. For example, in the above example, even if the electrical equipment that is a noise generating source is turned OFF, noise cannot be avoided as long as the vehicle is ON, so an appropriate one of the two may be implemented depending on the situation, such as by increasing the communication frequency band.

[0017] Continuing the explanation, returning to Fig. 1, the communication control device 100 includes a communication control unit 10 connected to an antenna 11, a setting unit 20, an electrical equipment control unit 30, and an output unit 40.

[0018] The communication control unit 10 controls wireless communication with the base station 200 via the antenna 11. In particular, the communication control unit 10 determines a communication frequency band between the vehicle and the exterior base station 200 when starting communication between the vehicle and the exterior base station 200. This communication frequency band may be assigned by the base station 200, or may be a communication frequency band (e.g., at least one communication channel) set by a setting unit 20 (described later) from among the assigned communication frequency bands (e.g., multiple communication channels). The multiple frequency bands used by the communication control device 100 may be, for example, a high UHF band (i.e., several GHz). In this embodiment, the multiple frequency bands used by the communication control device 100 may be two frequency bands, one of which is referred to as a first frequency band and the other as a second frequency band. For example, the first frequency band may be a 5 GHz band and the second frequency band may be a 2.4 GHz band. In each frequency band, a number of frequency channels can be used that is obtained by dividing the frequency band by a specific bandwidth. For example, in the second frequency band, the frequency channels are determined by dividing a frequency band (e.g., 2.4 GHz-2.48 GHz) by a specific bandwidth of 2 MHz, e.g., 40 channels, and one of these may be determined and used as the communication frequency band. Note that a high frequency band (so-called EHF (extremely high frequency, millimeter wave)) corresponding to a frequency band exceeding 52.6 GHz and up to 114.25 GHz may also be used.

[0019] As shown in FIG. 1, the communication control unit 10 includes an antenna switch 12 that switches between antennas 11, a noise detection unit 14, and a communication unit 16.

[0020] The antenna switch 12 is connected to the antenna 11. The antenna switch 12 may be connected to a BPF (i.e., a bandpass filter) that passes or blocks a specific frequency band. Note that the frequency may be switched using a known technique such as frequency hopping.

[0021] The noise detection unit 14 measures or determines the amount of electromagnetic noise in each frequency band within the cockpit module. Here, the noise detection unit 14 may also measure or determine the amount of noise from outside the vehicle. The noise detection unit 14 may then perform an analysis process to identify noise inside the vehicle and noise outside the vehicle. For example, the noise detection unit 14 may measure noise when only a specific electrical component 60 is in the ON state, and store the electrical component 60 and the frequency of the noise generated by that electrical component 60 in association with each other. This allows the noise detection unit 14 to perform an analysis process to distinguish noise over a wide range of frequencies between noise inside the vehicle and noise outside the vehicle.

[0022] The communication unit 16 communicates with the base station 200 via the antenna 11. Note that the communication unit 16 itself may be the antenna 11.

[0023] The communication control unit 10, setting unit 20, and electrical equipment control unit 30 of the communication control device 100 may be realized by a computer (for example, an Electronic Control Unit) including a CPU, a ROM, a RAM, and a semiconductor memory such as a flash memory. That is, each unit of the communication control device 100 is configured to realize each function by the CPU or the like executing a program stored in a recording medium.

[0024] When starting communication between the vehicle and the exterior base station 200, the setting unit 20 determines the communication frequency band between the vehicle and the exterior base station 200. Typically, the communication frequency is determined in accordance with a frequency allocation from the base station 200. Additionally or alternatively, in this embodiment (first embodiment), the setting unit 20 sets the communication frequency band based on the amount of electromagnetic noise measured or determined by the noise detection unit 14. Alternatively, additionally or alternatively, in this embodiment (second embodiment), the setting unit 20 sets the operating clock frequency of the electrical component 60 based on the amount of electromagnetic noise measured or determined by the noise detection unit 14.

[0025] In the first embodiment, for example, the setting unit 20 sets a communication frequency band that avoids noise inside the vehicle. This enables good communication by avoiding frequency bands that cause noise based on the amount of electromagnetic noise in the communication frequency band. The setting unit 20 may also determine the amount of noise from outside the vehicle and perform processing to avoid noise inside the vehicle. This enables better communication by distinguishing between noise outside the vehicle and noise inside the vehicle. The setting unit 20 may also set the communication frequency band based on the amount of electromagnetic noise measured based on the vehicle speed. As the vehicle speed increases, the amount of noise increases due to factors such as an increased frequency of frequency switching due to handover (H / O). Therefore, by measuring the amount of electromagnetic noise before starting communication, it becomes possible to set a frequency that avoids electromagnetic noise earlier at the start of communication.

[0026] The setting unit 20 may also detect the activation (ON) state of the electrical equipment 60 as an in-vehicle device and set the communication frequency band based on the amount of electromagnetic noise measured based on the activation state. By measuring the amount of electromagnetic noise in advance using the operation of an electrical equipment that generates a large amount of electromagnetic noise, such as an air conditioner, navigation system, or radio, as a trigger, it becomes possible to set a frequency that avoids electromagnetic noise sooner at the start of communication.

[0027] Furthermore, the setting unit 20 selects a communication frequency band from among a plurality of frequency bands (a plurality of channels, etc.). This selection of a communication frequency band makes it possible to set a frequency that avoids electromagnetic noise. Furthermore, when selecting a communication frequency band from a plurality of frequency bands, the setting unit 20 selects in order from highest frequency. This allows for the setting of a frequency that avoids electromagnetic noise by preferentially selecting a high frequency band with a small amount of electromagnetic noise. .

[0028] Furthermore, the setting unit 20 measures the amount of electromagnetic noise to estimate the area where the communication frequency band will be switched and to determine the new communication frequency band with the exterior base station. This allows the amount of electromagnetic noise to be measured before the area where the communication frequency will be switched (H / O) to be reached, making it possible to set a frequency that avoids electromagnetic noise earlier when starting communication.

[0029] In a second embodiment, the setting unit 20 identifies the electrical component 60 that is the source of electromagnetic noise based on the frequency band in which the amount of electromagnetic noise is equal to or greater than a predetermined value, and sets the operating clock frequency of the electrical component to a first frequency band that is different from the communication frequency band. As a result, the amount of electromagnetic noise in the communication frequency band is measured at the start of communication, so that the electrical component that is the noise source can be identified and its operating clock frequency can be set to the first frequency band, thereby enabling good communication with reduced effects of noise.

[0030] Furthermore, when the amount of electromagnetic noise in the first frequency band is equal to or greater than a predetermined value, the setting unit 20 changes the operating clock frequency of the electrical component 60 to the second frequency band. As a result, if the amount of noise is still large even when the operating clock frequency is set to the first frequency band, the setting unit 20 sets the operating clock frequency to the second frequency band, thereby enabling good communication with reduced influence of electromagnetic noise.

[0031] Furthermore, the setting unit 20 sets the second frequency band to a frequency higher than the first frequency band. By setting the fundamental wave of the operating clock frequency to a higher frequency band, the harmonics also become higher frequency bands, and the span between the fundamental wave and the harmonics also becomes wider, thereby reducing the effects of electromagnetic noise and enabling good communication.

[0032] Furthermore, the setting unit 20 resolves the frequency distribution of the measured electromagnetic noise to identify the electrical component 60 that is the source of the electromagnetic noise. By performing a process of resolving the frequency distribution, the frequency of the fundamental wave can be identified from the harmonic components, making it possible to reliably identify the electrical component that is the source of the electromagnetic noise.

[0033] Furthermore, when it is detected that the electrical component 60 that is the identified electromagnetic noise source is performing control related to vehicle driving, the setting unit 20 does not change the operating clock frequency until the control of the electrical component is completed. As a result, when the electrical component that is the identified electromagnetic noise source is performing control related to vehicle driving, by not changing the operating clock frequency, it is possible to perform control that maintains the safety of vehicle driving.

[0034] Furthermore, when switching the operating clock frequency of the electrical component 60, the setting unit 20 notifies the user in advance of the switching via the output unit 40. By notifying the user in advance when switching the operating clock frequency, it becomes possible to confirm the user's consent to the switching.

[0035] The electrical equipment control unit 30 is connected to various electrical equipment 60 and controls the electrical equipment 60. The electrical equipment control unit 30 may be implemented using a control unit such as an IVI (in-vehicle infotainment) control unit.

[0036] The output unit 40 is an output means such as a speaker or a display.

[0037] <2. Processing> 2.1 Processing of the First Embodiment An example of the processing of the first embodiment will be described with reference to the flowcharts of FIGS.

[0038] 4, the communication control unit 10 of the communication control device 100 determines whether to perform communication (SA-1). For example, the communication control unit 10 determines to start communication with a new base station 200 when the vehicle is started or handover.

[0039] When communication is not performed (SA-1, NO), the communication control unit 10 measures noise in each frequency band via the noise detection unit 14 (SA-2).

[0040] On the other hand, when communication is to be performed (SA-1, YES), the communication control unit 10 determines the communication frequency band in an exchange at the start of communication with the base station 200 via the communication unit 16 (SA-3). The communication frequency band used here is usually the communication frequency band assigned by the base station 200.

[0041] Then, the noise detection unit 14 measures or determines the amount of electromagnetic noise in each frequency band within the cockpit module (SA-4). As described above, the noise detection unit 14 may directly detect the amount of noise within the cockpit module, i.e., the amount of noise within the vehicle, or may determine the amount of noise within the vehicle by, for example, decomposing the frequency distribution from the overall noise amount including the noise outside the vehicle and the noise inside the vehicle.

[0042] If the in-vehicle noise is equal to or greater than a predetermined threshold (dB) (SA-4, YES), the setting unit 20 changes the communication frequency band by receiving allocation of a new communication frequency band through communication with the base station 200 under the control of the communication control unit 10 (SA-5). Note that the present invention is not limited to this, and the setting unit 20 may change the communication frequency by switching channels within the already allocated communication frequency band.

[0043] If the in-vehicle noise is less than the predetermined threshold (dB) (SA-4, NO), the communication control unit 10 starts communication via the communication unit 16 (SA-6).

[0044] The above is an example of the basic processing of the first embodiment. Here, an example of threshold control when measuring the amount of noise based on the vehicle speed will be described with reference to Fig. 5. Note that, hereinafter, the same step numbers are used to illustrate parts where the same processing as above is performed, and the description of the processing may be omitted.

[0045] In the above basic process, if communication is not being performed (SA-1, NO), the communication control unit 10 determines whether the vehicle speed is equal to or greater than a threshold value (km / h) (SA-21). The determination may be made using a vehicle speed sensor or GPS location information.

[0046] If the vehicle speed is equal to or greater than the threshold value (km / hour) (SA-21, YES), the noise detection unit 14 measures noise in each frequency band with a fast sweep time (SA-22).

[0047] On the other hand, if the vehicle speed is less than the threshold value (km / hour) (SA-21, NO), the noise detection unit 14 measures noise in each frequency band with a slow sweep time (SA-23).

[0048] As a result, as vehicle speed increases, the amount of noise increases due to factors such as an increased frequency of frequency switching caused by handovers (H / O). Therefore, by measuring the amount of noise in detail, it becomes possible to set frequencies that avoid electromagnetic noise, thereby improving communication accuracy.

[0049] The above is an example of threshold control when measuring the amount of noise based on the vehicle speed. Here, an example of control of noise measurement when operating the vehicle in the basic processing of the first embodiment will be described with reference to FIG.

[0050] In the above basic processing, if communication is not being performed (SA-1, NO) or if there is an electrical component 60 in the ON state (SA-23, YES), the noise detection unit 14 of the communication control unit 10 measures noise in each frequency band while avoiding the noise frequencies of the electrical components 60 that are in the ON state (SA-24). For example, as described above, the noise detection unit 14 may previously store in the memory unit each electrical component 60 associated with a noise frequency, and by referring to the memory unit, perform noise measurement while avoiding the noise frequencies of the electrical components 60 that are in the ON state.

[0051] On the other hand, if there is no electrical component 60 in the ON state (SA-25, NO), the noise detection unit 14 of the communication control unit 10 measures noise in each frequency band (SA-25).

[0052] As a result, when starting communication, the setting unit 20 can set the communication frequency more accurately based on the noise measurement result that avoids the noise frequencies of the electrical components 60 that are in the ON state. This completes the description of the processing of the first embodiment.

[0053] 2.2 Processing of the Second Embodiment An example of processing in the second embodiment will be described with reference to the flowcharts of Figures 7 to 9. In the second embodiment, the communication frequency is not set (changed) so as to avoid noise frequencies as in the first embodiment, but the noise frequencies are set (changed) so as to avoid communication frequencies.

[0054] That is, if the in-vehicle noise is equal to or greater than a predetermined threshold (dB) in step SA-4 above (SA-4, YES), the setting unit 20 changes the operating clock of each electrical component 60 to operating clock setting 1 (a first frequency band different from the communication frequency band) (SA-7).

[0055] Then, noise measurement is performed again (SA-8), and if the in-vehicle noise is equal to or greater than the predetermined threshold (dB) (SA-8, YES), the setting unit 20 changes the operation clock of each electrical component 60 to operation clock setting 2 (a second frequency band different from the communication frequency band) (SA-8). As a result, if the amount of noise is still large even when the operation clock frequency is set to the first frequency band, setting it to the second frequency band enables good communication with reduced influence of electromagnetic noise. Note that the setting unit 20 sets the second frequency band to a frequency higher than the first frequency band, thereby enabling good communication with further reduced influence of electromagnetic noise.

[0056] The above is an example of the basic processing of the second embodiment. Here, an example of processing in step SA-2 of the basic processing, in which frequency analysis is performed from the measurement results of the noise amount and the noise source is identified, will be described with reference to FIG.

[0057] As shown in FIG. 8, the noise detection unit 14 measures the noise in each frequency band (SA-26).

[0058] Then, the noise detection unit 14 changes only the clock frequency of the electrical component 60-1, measures the noise, and stores the results in the storage unit (SA-27). This process is also performed for each of the other electrical components 60 (SA-28, 29).

[0059] This allows the clock noise frequency of each electrical component 60-1 to 60-3 to be stored in correspondence with the memory unit, and the setting unit 20 can identify the electrical component 60 from the noise frequency based on the correspondence relationship in the memory unit, and can exclude the clock number of the electrical component 60 that is the source of noise from the communication frequency band.

[0060] The above is an example of the process of identifying the noise source by performing frequency analysis from the noise amount measurement results in step SA-2 of the basic process. Here, an example of the process of setting the operating clock in consideration of driving safety in steps SA-7 to SA-9 of the basic process will be explained using FIG.

[0061] As shown in FIG. 9, based on the noise measurement results in step SA-4 or SA-8, the setting unit 20 identifies the electrical component x that is the noise source by the association in the storage unit described above (SA-91).

[0062] When it is determined that the noise of the electrical component x is dominant because the amount of noise is equal to or greater than a threshold (SA-92), the setting unit 20 determines whether the electrical component x is an in-vehicle device related to driving safety (SA-93). For example, the electrical component 60 such as a speedometer, a car navigation system in use, or a collision avoidance safety device may be determined to be an in-vehicle device related to driving safety.

[0063] If the electrical component x is an in-vehicle device related to driving safety (SA-93, YES), the setting unit 20 does not change the clock count of the electrical component x (SA-94).

[0064] On the other hand, if the electrical component x is an in-vehicle device (such as an air conditioner) that is not important to driving safety (SA-93, NO), the clock number of the electrical component x is changed (SA-95).

[0065] As a result, when the electrical component that is the identified electromagnetic noise source is executing control related to vehicle driving, the operating clock frequency is not changed, thereby enabling control that maintains vehicle driving safety. When switching the operating clock frequency of the electrical component 60, the setting unit 20 may notify the user in advance via the output unit 40 that the frequency will be switched, or may be configured not to change the clock frequency if the user's consent cannot be confirmed.

[0066] This concludes the description of the processing of this embodiment. Note that part of the processing of the first embodiment and part of the processing of the second embodiment may be combined in any manner. [3.Effects] According to the embodiment described above in detail, the following effects are achieved.

[0067] In the first embodiment, the communication control device 100 sets a communication frequency band and performs communication based on the amount of electromagnetic noise measured or determined by noise detection when starting communication between the vehicle and the exterior base station 200. As a result, the amount of electromagnetic noise in the cockpit module is measured when starting communication with the exterior base station, and good communication is possible by avoiding frequency bands that cause noise, based on the amount of electromagnetic noise in the communication frequency band.

[0068] Furthermore, the communication control device 100 may determine the amount of noise from outside the vehicle and perform processing to avoid noise inside the vehicle. This allows for better communication by distinguishing between noise outside the vehicle and noise inside the vehicle.

[0069] Furthermore, the communication control device 100 may set the communication frequency band based on the amount of electromagnetic noise measured based on the vehicle speed. As the vehicle speed increases, the amount of noise increases due to factors such as an increased frequency of frequency switching caused by handover (H / O). Therefore, by measuring the amount of electromagnetic noise before starting communication, it becomes possible to set a frequency that avoids electromagnetic noise at the start of communication.

[0070] The communication control device 100 may also detect the activation (ON) state of the electrical equipment 60 as an in-vehicle device and set the communication frequency band based on the amount of electromagnetic noise measured based on the activation state. By measuring the amount of electromagnetic noise in advance using the operation of an electrical equipment that generates a large amount of electromagnetic noise, such as an air conditioner, navigation system, or radio, as a trigger, it becomes possible to set a frequency that avoids electromagnetic noise sooner when starting communication.

[0071] Furthermore, the communication control device 100 selects a communication frequency band from among a plurality of frequency bands (a plurality of channels, etc.) This allows the communication frequency band to be selected, making it possible to set a frequency that avoids electromagnetic noise.

[0072] Furthermore, when selecting a communication frequency band from multiple frequency bands, the communication control device 100 selects in order from the highest frequency. This allows for the setting of a frequency that avoids electromagnetic noise by preferentially selecting a high frequency band with a low level of electromagnetic noise.

[0073] Furthermore, the communication control device 100 estimates the area where the communication frequency band will be switched and measures the amount of electromagnetic noise to determine the new communication frequency band with the exterior base station. This allows the amount of electromagnetic noise to be measured before the area where the communication frequency will be switched (H / O) to be reached, making it possible to set a frequency that avoids electromagnetic noise earlier when starting communication.

[0074] In a second embodiment, the communication control device 100 identifies the electrical component 60 that is the source of electromagnetic noise based on the frequency band in which the amount of electromagnetic noise is equal to or greater than a predetermined value, and sets the operating clock frequency of the electrical component to a first frequency band that is different from the communication frequency band. As a result, the amount of electromagnetic noise in the communication frequency band is measured at the start of communication, and by identifying the electrical component that is the source of noise and setting its operating clock frequency to the first frequency band, good communication with reduced effects of noise is possible.

[0075] Furthermore, when the amount of electromagnetic noise in the first frequency band is equal to or greater than a predetermined value, the communication control device 100 changes the operating clock frequency of the electrical component 60 to the second frequency band. As a result, if the amount of noise is still large even when the operating clock frequency is set to the first frequency band, the frequency is set to the second frequency band, thereby enabling good communication with reduced influence of electromagnetic noise.

[0076] Furthermore, the communication control device 100 sets the second frequency band to a frequency higher than the first frequency band. By setting the fundamental wave of the operating clock frequency to a higher frequency band, the harmonics also become higher frequency bands, and the span between the fundamental wave and the harmonics also becomes wider, thereby reducing the effects of electromagnetic noise and enabling good communication.

[0077] Furthermore, the communication control device 100 resolves the frequency distribution of the measured electromagnetic noise to identify the electrical component 60 that is the source of the electromagnetic noise. By performing a process of resolving the frequency distribution, the frequency of the fundamental wave can be identified from the harmonic components, making it possible to reliably identify the electrical component that is the source of the electromagnetic noise.

[0078] Furthermore, when the communication control device 100 detects that the electrical component 60, which is an identified electromagnetic noise source, is performing control related to vehicle driving, the communication control device 100 does not change the operating clock frequency until the control of the electrical component is completed. As a result, when the electrical component, which is an identified electromagnetic noise source, is performing control related to vehicle driving, the operating clock frequency is not changed, thereby enabling control that maintains the safety of vehicle driving.

[0079] Furthermore, when the communication control device 100 switches the operating clock frequency of the electrical component 60, it notifies the user in advance of the switch via the output unit 40. By notifying the user in advance when switching the operating clock frequency, it becomes possible to confirm the user's consent to the switch.

[0080] 4. Other Embodiments Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modified forms.

[0081] In the above-described embodiment, the communication control device 100 includes one communication control device 100 and multiple electrical components 60, but the present disclosure is not limited to this. For example, the communication system in the present disclosure may include one communication control device 100 and one electrical component 60. Alternatively, the communication system in the present disclosure may include multiple communication control devices 100 and one electrical component 60.

[0082] In the above embodiment, the communication control device 100 is mounted on a vehicle, but the present disclosure is not limited to this. For example, the communication control device 100 may be mounted on various devices other than a vehicle, or may be connected to various devices for use.

[0083] The communication control method described in the present disclosure may be implemented by a special-purpose computer configured by configuring a processor and memory programmed to execute one or more functions embodied in a computer program. Alternatively, the communication control method described in the present disclosure may be implemented by a special-purpose computer configured by configuring a processor with one or more dedicated hardware logic circuits. Alternatively, the communication control method described in the present disclosure may be implemented by one or more special-purpose computers configured by combining a processor and memory programmed to execute one or more functions with a processor configured with one or more hardware logic circuits. Furthermore, the computer program may be stored as instructions executed by a computer on a non-transitory computer-readable storage medium. The method for implementing the functions of each unit of the communication control device 100 does not necessarily need to include software; all of the functions may be implemented using one or more hardware components.

[0084] In the above embodiments, multiple functions of one component may be realized by multiple components, or one function of one component may be realized by multiple components. Furthermore, multiple functions of multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Furthermore, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. [Explanation of symbols]

[0085] 200 base stations 100 Communication control device 10. Communication control section 11 Antenna 12 Antenna switch 14 Noise detection section 16 Communications Department 20 Setting section 30 Electrical equipment control unit 30 40 Output section 60 Electrical equipment

Claims

1. A communication control device that determines a communication frequency band between a vehicle and an exterior base station when starting communication between the vehicle and the exterior base station whose connection destination is switched by handover, comprising: Measure or determine the amount of electromagnetic noise in each frequency band within the cockpit module, changing the communication frequency band based on the amount of electromagnetic noise; and communicating with an external base station using the changed communication frequency band. Communications control device.

2. By determining the amount of noise from outside the vehicle, the communication frequency band is changed to one that avoids noise inside the vehicle. The communication control device according to claim 1 .

3. changing the communication frequency band based on the amount of electromagnetic noise measured based on the vehicle speed; 3. The communication control device according to claim 1 or 2.

4. Detects the startup status of in-vehicle devices, changing the communication frequency band based on the amount of electromagnetic noise measured based on the startup state; 4. The communication control device according to claim 1.

5. selecting the communication frequency band from a plurality of frequency bands; 5. The communication control device according to claim 1.

6. When selecting the communication frequency band from a plurality of frequency bands, the frequency bands are selected in descending order of frequency; 6. The communication control device according to claim 1.

7. an area where a communication frequency band is switched is estimated, and the amount of electromagnetic noise is measured before the vehicle reaches the area; 7. The communication control device according to claim 1.

8. A communication control method executed in a communication control device that determines a communication frequency band between a vehicle and an exterior base station when communication is initiated between the vehicle and an exterior base station whose connection destination is switched by handover, comprising: Measure or determine the amount of electromagnetic noise in each frequency band within the cockpit module, changing the communication frequency band based on the amount of electromagnetic noise; and communicating with an external base station using the changed communication frequency band. Communication control method.

9. When the vehicle speed is equal to or greater than a predetermined threshold, the amount of electromagnetic noise in each frequency band is measured; changing the communication frequency band based on the amount of electromagnetic noise; 3. The communication control device according to claim 1 or 2.

10. Detects the startup status of in-vehicle devices, If there is an on-board device whose activation state is ON, measure the amount of electromagnetic noise in each frequency band excluding the electromagnetic noise frequency of the on-board device whose activation state is ON; changing the communication frequency band based on the amount of electromagnetic noise; 4. The communication control device according to claim 1.

11. When selecting the communication frequency band from a plurality of frequency bands, a higher frequency is selected preferentially.

6. The communication control device according to claim 1.

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