KR20190044739A - Communication device, vehicle having the communication device, and method for controlling the vehicle - Google Patents

Abstract

According to an aspect of the present invention, provided are a communication device for controlling at least one operation of a first communication unit and a second communication unit based on a data processing rate, a vehicle having the same, and a control method thereof. A communication device of the present invention comprises: a first communication unit having an antenna module and performing communication with an external device using the antenna module; a second communication unit having an optical module and performing communication with an external device using the optical module; and a control unit for controlling operation of the second communication unit based on a data processing rate of a communication signal received in the first communication unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a communication device, a vehicle having the communication device,

The present invention relates to a communication device for expanding a communication area and improving communication performance, a vehicle having the communication device, and a control method for the vehicle.

The intelligent vehicle includes at least one sensor of an ultrasonic sensor, an image sensor, a laser sensor, and a rider sensor that can replace a human view, and uses at least one sensor to collect information related to the running of the vehicle, It is possible to prevent the driver from recognizing the road environment accurately even if the driver can not accurately recognize the road environment due to the driver's carelessness, Prevention of accidents by assisting in recognition.

Intelligent vehicles are provided with driving information of surrounding vehicles, road status information, and inter-vehicle emergency message information through intelligent traffic system (ITS) service as well as route guidance and traffic jam notification information through development of sensors and communication technology, And controls the travel based on the provided information.

The intelligent vehicle has a problem in that the radiant energy of the antenna due to the metal of the roof panel is eccentrically generated when the intelligent vehicle communicates with the intelligent traffic system using the antenna.

The eccentricity of the radiant energy of such an antenna causes the communication distance to be short and the communication failure to occur because the antenna energy can not be concentrated on the other vehicle during communication between the vehicles.

In addition, the antenna, which is a communication device, is an omnidirectional antenna, which transmits radiant energy not only to the front and rear of the vehicle but also to the upper part of the vehicle body unnecessarily, thereby wasting radiant energy. As a result, the radiation area is reduced, .

A communication device includes a first communication section for transmitting / receiving a communication signal to / from a first communication area, and a second communication section for transmitting / receiving a communication signal to / from the second communication area.

Another aspect provides a communication device for controlling operations of at least one of a first communication unit and a second communication unit based on a data processing rate, a vehicle having the same, and a control method thereof.

A communication device according to an aspect includes a first communication unit having an antenna module and performing communication with an external device using an antenna module; A second communication unit having an optical module and performing communication with an external device using the optical module; And a control unit for controlling the operation of the second communication unit based on the data processing rate of the communication signal received by the first communication unit.

The control unit of the communication device controls the operation of the first communication unit so that the first communication unit and the external device communicate with each other if the data processing rate is equal to or greater than the first reference processing rate, And controlling the operation of the second communication unit so that the communication unit and the external apparatus communicate with each other.

The communication unit according to one aspect further includes a switch unit disposed between the control unit and the optical module, and the control unit turns on the switch unit when the data throughput is less than the first reference throughput, and turns off the switch unit when the data throughput is equal to or greater than the first reference throughput. .

The control unit of the communication device according to an aspect includes recognizing data based on the communication signal received by the first communication unit and the second communication unit when the switch unit is in the ON state.

The control unit of the communication apparatus according to an aspect includes maintaining the ON state of the switch unit when the data processing rate is less than the second reference processing rate while the switch unit is ON and turning OFF the switch unit when the data processing rate is equal to or greater than the second reference processing rate.

The control unit of the communication device according to one aspect includes converting a communication signal into an electromagnetic wave in the first communication unit operation control and converting the communication signal into light in the second communication unit operation control.

The first communication unit of the communication device according to an aspect transmits a communication signal to the first communication area and receives the communication signal of the first communication area and the second communication unit receives the communication signal to the second communication area different from the first communication area And receiving the communication signal of the second communication area.

A vehicle according to another aspect includes: a body; A first communication unit for transmitting and receiving a communication signal in a first communication area using an antenna module with an antenna module provided in a vehicle body; A second communication unit for transmitting and receiving a communication signal of a second communication area, which is different from the first communication area, by using the optical module provided in the vehicle body; And controls the operation of the first communication unit so that the first communication unit and the external apparatus communicate with each other if the confirmed data processing rate is equal to or greater than the first reference processing rate, And controlling the operation of the second communication unit if the first reference processing rate is less than the first reference processing rate.

The vehicle according to another aspect further includes a switch unit disposed between the control unit and the optical module, and the control unit turns on the switch unit when the data processing rate is less than the first reference throughput rate, and turns off the switch unit when the data processing rate is equal to or greater than the first reference processing rate .

The control unit of the vehicle according to the other aspect recognizes the data based on the communication signal received by the first communication unit when the switch unit is in the off state and transmits the data based on the communication signal received by the first communication unit and the second communication unit, Lt; / RTI >

The controller of the vehicle according to another aspect estimates a communication signal transmitted from the external device from the communication signal received through the first communication unit and the communication signal received through the second communication unit using the maximum rate combining algorithm when the switch unit is on, And recognizing data of the estimated communication signal.

The control unit of the vehicle according to the other aspect includes maintaining the ON state of the switch unit when the data processing rate is less than the second reference processing rate and turning off the switch unit when the data processing rate is equal to or greater than the second reference processing rate.

The control unit of the vehicle according to the other aspect recognizes the data based on the communication signal received by the first communication unit when the switch unit is in the OFF state and recognizes the data based on the communication signal received by the second communication unit when the switch unit is ON .

The first communication unit of the vehicle according to the other aspect transmits the communication signal to the first communication area and receives the communication signal of the first communication area and the second communication unit transmits the communication signal to the second communication area, Lt; / RTI >

The vehicle according to another aspect further includes an obstacle detection unit that detects an obstacle, and the control unit acquires the position of another vehicle based on the detection information of the obstacle detection unit and controls the operation of the second communication unit based on the obtained position do.

According to another aspect of the present invention, there is provided a control method for a vehicle that communicates with another vehicle, the method comprising: receiving a communication signal using an antenna module provided in a vehicle body; confirming a data processing rate of the received communication signal; Communication with another vehicle is performed using the antenna module if the data processing rate is equal to or greater than the first reference processing rate and communication with another vehicle is performed using the optical module provided in the vehicle body if the confirmed data processing rate is less than the first reference processing rate do.

The communication with another vehicle using the optical module includes activating the optical module by turning on the switch connected to the optical module if the data throughput is less than the first reference throughput.

The communication with the other vehicle using the optical module periodically checks the data processing rate of the communication signal received by the first communication unit and maintains the ON state of the switch unit when the confirmed data processing rate is less than the second reference processing rate And turning off the switch unit to deactivate the optical module if the data processing rate is equal to or greater than the second reference processing rate.

The communication with the other vehicle using the optical module is performed by using the maximum rate combining algorithm when the switch unit is on, and the communication signal received from the other vehicle from the communication signal received by the optical module, And recognizing the data of the estimated communication signal.

Conducting communication with another vehicle using the antenna module includes converting the electromagnetic wave received by the antenna module into a digital communication signal and recognizing the data based on the converted communication signal.

Conducting communication with another vehicle using the optical module includes converting the optical signal received by the optical module into a digital communication signal and recognizing the data transmitted from the other vehicle based on the converted digital signal .

Since communication signals of different directions are transmitted and received using a plurality of communication units of different types, communication signals can be smoothly transmitted and received in all directions, and communication performance can be improved.

The present invention can maintain communication with other vehicles and infrastructures even when the direction and distance of other vehicles and infrastructures are changed on the basis of the position of the vehicle according to the speed change of at least one of the vehicle and the other vehicle. It is possible to process data reliably in communication with the infrastructure, and thereby, the data can be stably executed.

As described above, the present invention can maximize the effect of the V2V communication service because it can provide the vehicle-to-vehicle communication coverage and the data throughput required by the V2V communication service.

Also, the present invention can selectively use the second communication unit through the switch only when a communication failure occurs in the first communication unit, thereby reducing the overload of the entire hardware and the process load associated with the communication.

As described above, the present invention can improve the quality and merchantability of the intelligent vehicle, further increase the satisfaction of the user, improve the convenience of the user and the safety of the vehicle, and secure the competitiveness of the product.

1 is an exemplary view of a vehicle according to an embodiment;
Fig. 2 is an internal view of the vehicle shown in Fig. 1. Fig.
3 is an exploded perspective view of an antenna module of a first communication unit provided in a vehicle according to an embodiment.
4 is an exemplary view of a first communication area of a first communication unit provided in a vehicle according to an embodiment;
5 is an exemplary view of an optical module of a second communication unit provided in a vehicle according to an embodiment.
6 is an exemplary view of a second communication area of a second communication unit provided in a vehicle according to an embodiment.
7 is a diagram illustrating a communication example of a vehicle according to an embodiment.
8 is a control configuration diagram of a vehicle according to an embodiment.
9 is a control flowchart of a vehicle according to an embodiment.
10 is a diagram illustrating an example of communication using a first communication unit of a vehicle according to an embodiment.
11 is a diagram illustrating a communication example using the first and second communication units of the vehicle according to the embodiment.
12 is a control configuration diagram of a vehicle according to another embodiment.
13 is a configuration diagram of a second communication unit of a vehicle according to another embodiment.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The vehicle 100 includes a body having an exterior 110 and an interior 120 and a chassis on which a machine necessary for traveling to the rest except for the vehicle body is installed.

1, the exterior 110 of the vehicle body includes a front panel 111, a bonnet 112, a roof panel 113, a rear panel 114, front, rear, left and right doors 115, And a window glass 116 which is openably and closably provided on the window glass 115.

The window glass may include a front window glass, a rear window glass, and a plurality of side window glasses.

The exterior of the vehicle body includes a lamp 117 for easily viewing surrounding information while observing the forward view, a lamp 117 functioning as a signal and a communication for other vehicles and pedestrians, and a lamp 117 provided at a boundary between front and rear window glasses A filler 118 and a side mirror 119 for providing the driver with a field of view behind the vehicle 100. [

The enclosure of the vehicle body includes an antenna module 200a which is a communication device 200 for performing a wireless vehicle network (V2X: Vehicle to everything) such as communication (V2V) with other vehicles and communication (V2I) with the infrastructure .

Here, the antenna module 200a may be provided on the roof panel 113 of the vehicle. In addition, the antenna module 200a may be provided on the rear window glass of the vehicle.

2, the interior body 120 of the vehicle body includes a seat 121 on which an occupant sits, a dashboard 122, and a tachometer 120. The tachometer 120 includes a tachometer, a speedometer, a coolant thermometer, a fuel meter, (I.e., cluster 123) in which a door open warning lamp, an engine oil warning lamp, a fuel oil warning lamp, and a fuel shortage warning lamp are arranged, an air conditioner blower A head unit 125 provided in the center pacea 124 and receiving an operation command of the audio equipment and the air conditioner and a head unit 125 provided in the center pacea 124, And a startup unit 126 for receiving input.

The vehicle is provided with a shift lever which is provided at the center pedestal 124 and receives an operation position and a parking button EPB button located in the vicinity of the shift lever or the head unit 125 and receiving an operation command of an electronic parking brake device ).

The vehicle 100 may further include an input unit 127 for receiving operation commands of various functions.

The input unit 127 may be provided in the head unit 125 and the center pacea 124 and may include at least one physical button such as an operation on-off button for various functions, a button for changing setting values of various functions can do.

The input unit 127 can receive either the manual driving mode in which the driver directly operates the vehicle or the autonomous driving mode. When the autonomous driving mode is input, the input unit 127 transmits the input signal in the autonomous driving mode to the ECU do.

In addition, the input unit 127 receives information of the destination when the navigation function is selected, and receives channel and volume information when the DMB function is selected.

The input unit 127 may further include a jog dial (not shown) or a touch pad (not shown) for inputting a cursor movement command and a selection command displayed on the display unit of the user interface 129.

Here, the jog dial or the touch pad may be provided in a center fascia or the like.

The vehicle 100 may further include a display unit 128 provided in the head unit 125 for displaying information on functions performed in the vehicle and information input by the user.

The vehicle further includes a user interface 129 for user's convenience.

The user interface 129 displays an image of at least one function selected by the user among an audio function, a video function, a navigation function, a broadcast function (DMB function), and a radio function.

In addition, the user interface 129 can display images in the longitudinal, lateral, and lateral directions in the autonomous running mode. That is, the user interface 129 can display environment information and driving information of the road in the autonomous driving mode.

The user interface 129 may be embedded in a dashboard or embedded in a dock.

The user interface 129 may include a display panel as a display unit, and may further include a touch panel as an input unit.

That is, the user interface 129 may include only a display panel, and the display panel may include a touch screen integrated with the touch panel.

When the user interface 129 is implemented using only a display panel, a button displayed on the display panel can be selected using the input unit 127 provided in the center fascia.

When the user interface 129 is implemented as a touch screen, a user's operation command can be input directly through the touch panel.

As such, the user interface 129 may include a display unit, and may further include an input unit.

The vehicle frame is a frame for supporting the vehicle bodies 110 and 120. The frame includes wheels 131 disposed at front and rear and right and left sides, a power unit for applying driving force to the front and rear right and left wheels 131, a steering device, A braking device for applying a braking force to the braking device 131 and a suspension device for adjusting the suspension of the vehicle may be provided.

The vehicle 100 includes a steering wheel 132 of the steering device for adjusting the direction of travel, a brake pedal 133 that is pressed by the user in accordance with the braking will of the user, And an accelerator pedal 134 (see Fig. 2).

The vehicle's vehicle frame further includes a power generating device, a power transmission device, a transmission, a fuel device, and the like, and may include various safety devices for the safety and convenience of the occupant.

Examples of the stabilizing device of the vehicle include an anti-collision device for preventing collision with an obstacle around the vehicle, an alarm device for notifying a dangerous situation such as a collision, an airbag control device for the purpose of safety of a passenger, Electronic stability control (ESC) for controlling the attitude of the vehicle when the vehicle is accelerating or cornering, and ABS (Anti-lock Brake System) for preventing the wheel from locking at the time of sudden braking. .

The vehicle 100 further includes a communication device 200 for performing communication between various internal electronic devices, communication with a user terminal (not shown), communication with a storage medium, and communication with an external device can do.

The external device may include at least one of the other vehicle, the server, and the infrastructure.

This embodiment will be described in detail with respect to the communication device 200 for performing communication with an external device.

The communication device 200 includes a first communication unit 210 for communicating with an external device using the antenna module 200a and a second communication unit 220 for communicating with the external device using the optical module 200b. .

The antenna module 200a of the first communication unit 210 radiates the alternating voltage modulated by the transmission unit as electromagnetic waves to the atmosphere when transmitting and converts the alternating voltage to an alternating voltage evaluated by the receiving unit The communication module may further include a plurality of antennas for receiving a radio signal, a broadcast signal, and a satellite signal, and transmitting and receiving signals to and from another vehicle, a server, and a base station, respectively.

3, the antenna module 200a of the first communication unit 210 includes a bottom member 211 mounted on the roof panel 113 of the vehicle body, a bottom member 211 coupled to the bottom member 211, And a cover member 212 covering the cover member 212.

The bottom member 211 includes a synthetic resin and is attached to the vehicle body to prevent foreign matter from entering into the space between the vehicle body and the cover member 212, thereby relieving impact transmitted from the vehicle body.

The bottom member 211 is installed at the upper rear of the vehicle so that there is little fear of interference with surrounding components and the reception ratio of the radio signal is good.

Also, the bottom member 211 may be formed to have a wider cross section toward the rear side. Accordingly, it is possible to reduce the occurrence of resistance and noise caused by wind generated when the vehicle body moves.

The antenna module 200a having an outer appearance formed by the bottom member 211 and the cover member 212 may be provided in a shank fin type.

The antenna module 200a includes a base member 213 disposed on the bottom member 211 and a driving module 214 disposed on the base member 213. [

The base member 213 provides a space for mounting the driving module 214 and the plurality of antennas 215, 216, and 217.

The driving module 214 may be provided as a printed circuit board (PCB) having wiring formed by etching copper or the like on a substrate.

The driving module 214 may include a signal processing circuit for signal processing in a manner of amplifying or filtering the signals received by the plurality of antennas 215, 216, and 217, respectively.

Here, the signal processing circuits for a plurality of antennas may be provided separately for each antenna.

The driving module 214 transmits the driving signal to a control unit (ECU) or a user interface 129 mounted in the vehicle body.

The driving module 214 extracts and optimizes radio, TV, or DMB broadcasting signals.

The driving module 214 may be implemented as a single integrated receiving module by mounting the AM / FM tuner, the DSP, and the microcomputer, which are designed in the head unit, on a circuit board.

The first antenna 215 is an antenna for receiving signals of the first frequency band, and may be an antenna for receiving signals of the GPS and DMB bands, for example.

The first antenna 215 receives a signal from the GPS satellite. The first antenna 215 may include a GPS receiver.

The first antenna 215 is in the form of a ceramic dielectric patch antenna. The first antenna 215 is mounted on the driving module 214 and transmits the received GPS signal or the like to the driving module 214 through a feed pin or the like.

At this time, the driving module 214 may transmit the GPS signal received from the GPS receiving unit to the terminal or the like.

The second antenna 216 may be seated in the drive module 214 and spaced apart from the first antenna 215.

The second antenna 216 is an antenna for receiving a signal of the second frequency band, for example, an antenna for receiving the FM / AM band.

As the second antenna 216, various other antennas such as a chip antenna and a microstrip patch antenna may be used in addition to the coil antenna.

The third antenna 217 is an antenna for receiving a signal of 5850 MHz to 5925 MHz, which is the third frequency band.

The signal received at the third antenna 217 is provided to the drive module 214 and the feed signal provided at the third antenna 217 is provided from the drive module 214.

The third antenna 217 may be a patch antenna.

The communication scheme of the first communication unit using the antenna may be a second generation (2G) communication scheme such as Time Division Multiple Access (TDMA) and Code Division Multiple Access (CDMA), wideband code division multiple access (3G) communication systems such as Wide Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA2000), Wireless Broadband (Wibro) and World Interoperability for Microwave Access (WiMAX) (4G) communication method such as Long Term Evolution (LTE) and Wireless Broadband Evolution, or a 5th generation (5G) communication method.

As shown in FIG. 4, the antenna module 200a of the first communication unit 210 transmits / receives a communication signal of the first communication area.

Here, the first communication area A1 may include four areas corresponding to the front, rear, left and right sides of the vehicle on the basis of forward travel of the vehicle.

The communication method using the antenna module is classified into a second generation (2G) communication method such as Time Division Multiple Access (TDMA) and Code Division Multiple Access (CDMA), a Wideband Code Division Multiple Access (3G) communication method such as Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA2000), Wireless Broadband (Wibro) and WiMAX (Wide Interoperability for Microwave Access) (4G) communication method such as Evolution (LTE) and Wireless Broadband Evolution, or a fifth generation (5G) communication method.

5, the optical modules 200b (b1, b2, b3, b4) of the second communication unit 210 perform optical communication with at least one of the other vehicle and the infrastructure, and at least one of the other vehicles and the infrastructure And an optical element that emits light toward one and receives light emitted from at least one of the other vehicle and the infrastructure. The optical device may include a light emitting device such as a light emitting diode (LED) and a light receiving device such as a photodiode.

The plurality of optical modules may be provided at the front and rear ends of the left and right side panels of the vehicle, respectively.

In addition, the optical modules 200b (b1, b2, b3, b4) may be provided at both ends of the front panel, at both ends of the rear panel, and at respective corners of the roof panel.

As shown in FIG. 6, the plurality of optical modules 200b transmit and receive communication signals of the second communication area A2, respectively.

Here, the second communication area A2 may include an area corresponding to four corner directions of the vehicle.

That is, the first optical module b1 is provided at a position adjacent to the front left corner of the vehicle on the basis of the forward travel of the vehicle, and emits light toward the front left side of the vehicle on the basis of the forward travel of the vehicle, Lt; / RTI >

The second optical module b2 is provided at a position adjacent to the front right corner of the vehicle on the basis of the forward travel of the vehicle and emits light to the front right side of the vehicle on the basis of the forward travel of the vehicle and receives light from the front right side of the vehicle do.

The third optical module b3 is provided at a position adjacent to the rear left corner of the vehicle on the basis of the forward travel of the vehicle and emits light to the rear left side of the vehicle based on the forward travel of the vehicle and receives light from the rear left side of the vehicle do.

The fourth optical module b4 is provided at a position adjacent to the rear right corner of the vehicle on the basis of the forward travel of the vehicle and emits light to the rear right side of the vehicle on the basis of the forward travel of the vehicle and receives light from the rear right side of the vehicle do.

As shown in FIG. 7, the vehicle 100 can perform V2V communication with the other vehicle 300 using the first communication unit 210 and the second communication unit 220. FIG.

That is, the present vehicle 100 and the other vehicle 300 can transmit and receive their own position information, driving information, environment information of the road, and satellite information through inter-vehicle communication.

The vehicle can receive traffic information and information collected from other vehicles by performing communication (V2I communication) between the server 500 and the infrastructure 300 using the first and second communication units.

Here, the server 500 receives traffic information, environmental information of roads, and the like from a plurality of vehicles 100 and 300, and provides the information to a plurality of vehicles.

The road infrastructure 400 transmits and receives control signals to and from the server 500.

That is, the infrastructure 400 receives the electromagnetic waves emitted from the antenna module 200a of the vehicle 100 and can transmit the electrical signals corresponding to the received electromagnetic waves to the server 500, and the electrical signals transmitted from the server 500 To an electromagnetic wave, and then emit the converted electromagnetic wave.

The infrastructure 400 also receives the light emitted from the optical module 200b of the vehicle 100 and can transmit an electrical signal corresponding to the received light to the server 500 and the electrical signal transmitted from the server 500 Can be converted into light, and then the converted light can be emitted.

The first communication unit 210 of the vehicle 100 receives the electromagnetic wave transmitted from the infrastructure 400 through the antenna module 200a and transmits an electrical signal corresponding to the received electromagnetic wave to the control unit.

The second communication unit 220 of the vehicle 100 receives the light transmitted from the infrastructure 400 through the optical module 200b and transmits an electrical signal corresponding to the received light to the control unit.

Accordingly, the vehicle 100 can be provided with location information of the infrastructure, environment information of the road, etc. through communication with the infrastructure 400.

In this way, the vehicle can obtain various kinds of information necessary for driving by carrying out a wireless vehicle network (V2X: Vehicle to everything) such as communication (V2V) with other vehicles and communication (V2I) with the infrastructure.

FIG. 8 is a control configuration diagram of a vehicle according to an embodiment, and FIG. 9 is a detailed configuration diagram of a second communication section provided in a vehicle according to an embodiment.

As shown in Fig. 8, the vehicle 100 includes a user interface 129 and a communication device 200. Fig.

The user interface 129 receives operation commands for at least one function from the user and displays operation information for at least one function.

The user interface 129 may include an input unit 129a and a display unit 129b.

The input unit 129a receives at least one of a manual driving mode, an autonomous driving mode, and an information providing mode for providing environment information of a current road to another vehicle and receiving environment information of the road from another vehicle.

The input unit 129a can also receive a destination in the autonomous mode.

The display unit 129b displays image information generated during the execution of the program, for example, various menu image information, digital broadcast image information, navigation image information, and the like, and displays external image information in front of the vehicle. Here, various kinds of information displayed through the display unit 129b may be transmitted to an external device through the communication device 200. [

The display unit 129b can display the status information of the road from the current position to the destination on the basis of the information received by the communication device 200. [

That is, the display unit 129b can display the information of the current driving mode and display the information of the destination.

Here, the destination information may include address information, total distance information, total travel time information, remaining distance information, remaining time information, and the like.

The user interface 129 may include only the display unit 129b and may receive an operation command through the input unit 127 provided in the head unit or the center fascia.

The communication device 200 performs communication with the other vehicle 300, which is an external device, and the infrastructure 400. The communication device 200 includes a first communication unit 210, a second communication unit 220, and a control unit 230.

The first communication unit 210 communicates with the other vehicle 300 around the vehicle using the antenna module 200a and also communicates with the infrastructure 400 around the vehicle.

The first communication unit 210 has a first communication area for transmitting and receiving a communication signal in the forward, backward, left and right lateral directions of the vehicle with reference to the straight forward direction of the vehicle.

The first communication unit 210 receives a communication signal from the other vehicle and the infrastructure located in the first communication area and transmits the received communication signal to the control unit 230. Based on the command of the control unit 230, And transmits the communication signal to other vehicles and infrastructure located in the network.

The first communication unit 210 includes a first signal processing unit 210a, a first transmitting unit 210b, a first receiving unit 210c, and an antenna module 200a.

The first signal processing unit 210a converts the digital communication signal transmitted from the controller 230 into an analog communication signal and transmits the converted analog communication signal to the first transmitting unit 210b.

Digital communication signals may include data

The analog communication signal may be a low frequency communication signal.

The first signal processing unit 210a converts the analog communication signal transmitted from the first receiving unit 210c into a digital communication signal and transmits the converted digital communication signal to the control unit 230. [

The first signal processing unit 210a may include a conversion unit (ADC) for converting an analog communication signal into a digital communication signal.

The first signal processing unit 210a can also remove the noise of the received communication signal.

The first transmitter 210b modulates a communication signal of a low frequency into a communication signal of a radio frequency using a radio frequency (RF) signal of a local oscillator (not shown) Through the antenna module 200a.

The first receiver 210c demodulates a communication signal of the received radio frequency using a radio frequency (RF) signal of a local oscillator and transmits the demodulated low frequency communication signal to the first signal processor 210a .

The antenna module 200a radiates the communication signal received through the first transmitting unit 210b to a free space and transmits the communication signal received from the free space to the first receiving unit 210c.

The first communication unit 210 may further include a selection unit (not shown).

The selecting unit may select the first transmitting unit or the first receiving unit according to the selection signal of the controller 230 and may provide the communication signal to the antenna module through the selected first transmitting unit, .

Here, the selection unit may enable the third antenna among the antenna modules to be turned on or off.

Here, the first signal processing unit 210a, the first transmitting unit 210b, and the first receiving unit 210c may be implemented as a single processor.

The second communication unit 220 communicates with other vehicles 300 around the vehicle using a plurality of optical modules 200b and also communicates with the infrastructure 400 around the vehicle.

The second communication unit 220 has a second communication area for transmitting / receiving a communication signal to / from the front left and right oblique directions of the vehicle and the left and right oblique directions of the vehicle based on the straight forward direction of the vehicle.

The second communication unit 220 receives the communication signal from the other vehicle and the infrastructure located in the second communication area and transmits the received communication signal to the control unit 230. Based on the command of the control unit 230, And transmits the communication signal to other vehicles and infrastructure located in the network.

The second communication unit 220 includes a second signal processing unit 220a, a second transmitting unit 220b, a second receiving unit 220c, a switch unit 220d, and an antenna module 200a.

The second signal processing unit 220a modulates the digital communication signal transmitted from the control unit 230 with a carrier wave having a constant amplitude and transmits the modulated carrier wave to the second transmission unit 220b.

Here, the digital communication signal may include data composed of a high signal and a low signal.

The second signal processing unit 220a generates a pulse-shaped communication signal having a predetermined frequency when the signal is a high signal, and outputs the generated communication signal to the second transmitting unit 220b.

The generated communication signal is a carrier wave.

Thus, the second signal processing unit can efficiently transmit data by modulating the communication signal to a carrier wave, and can minimize the influence on external light or noise.

The second signal processing unit 210a converts the analog communication signal transmitted from the second receiving unit 220c into a digital communication signal and transmits the converted digital communication signal to the control unit 230. [

The second signal processing unit 220a may include a conversion unit (ADC) for converting an analog communication signal into a digital communication signal.

The second signal processing unit 220a can also remove the noise of the received communication signal.

The second signal processing unit 220a filters only the communication signal having a predetermined frequency component from the communication signal received through the second receiving unit 220c and outputs the filtered communication signal as a communication signal of a square wave having high and low signals, 230.

The second signal processing unit 220a may output a communication signal having a predetermined frequency component as a high signal and a communication signal having remaining frequency components as a low signal.

Here, the communication signal received through the second receiving unit 220c may be an electric signal.

The second transmission unit 220b modulates the communication signal of the carrier transmitted from the control unit 230 into an optical signal and outputs the modulated optical signal through the optical module 200b.

Here, the optical module that outputs light may be an infrared (IR) light emitting diode.

When the light is received through the optical module 200b, the second receiving unit 220c converts the light into an electric signal by the photoelectric effect and transmits the converted electric signal to the second signal processing unit 220a.

Where the electrical signal may be a current signal.

An optical module receiving light can be passed through an infrared (IR) photodiode and only infrared wavelengths.

The controller 230 may communicate with the first antenna 215 and the second antenna 216 of the antenna module 200a to perform a radio function, a DMB broadcasting function, or a navigation function.

The controller 230 calculates the position of the current vehicle on the basis of the position information received by the first antenna 215 of the antenna apparatus when the navigation function is performed, maps the calculated position to map data previously stored, Displays a route from the current position calculated according to a preset route search algorithm to a destination, receives the destination from the user, displays the route on the map and displays the route to the destination along the route, do.

The control unit 230 controls the output of the radio broadcast using the radio signal received by the second antenna 216 of the antenna module when the radio function is performed.

The control unit 230 controls the overall operation of the communication device 200 when a mode requiring communication with the external device is selected. Here, the mode requiring communication with the external device may include at least one of an autonomous driving mode and an information providing mode.

The control unit 230 obtains driving information and road environment information related to the own vehicle based on the detection information detected through the detection unit (not shown) upon receiving the information providing mode execution command, And controls the transmission of information.

Here, the detection unit may include a speed detection unit that detects a running speed of the vehicle, an image detection unit that detects an image of a road, a rain detection unit that detects precipitation, a temperature detection unit that detects an external temperature, and a humidity detection unit that detects humidity.

When at least one of the information providing mode and the autonomous driving mode is received, the control unit 230 receives the environmental information of the road from the other vehicle and the infrastructure through the communication device 200 and displays the environment information of the received road It is also possible to control.

The control unit 230 performs an autonomous driving function based on the obtained driving information, the acquired environment information of the road, and the environment information of the road received through the communication device 200 when the autonomous driving mode execution command is received .

When an execution command of the autonomous driving mode is received, the control unit 230 checks the destination information, searches for the route from the current position to the destination based on the confirmed destination information, and controls the driving device (not shown) do.

At this time, the control unit 230 may control driving of at least one of a power generating device, a power transmitting device, a traveling device, a steering device, a braking device, a suspension device, a transmission, and a fuel device.

Also, the control unit 230 can re-search the route to the destination on the basis of the running information, the environment information of the road, and the environment information of the received road during the self-running mode execution, It is also possible to control the display of the environmental information of the road and the environmental information of the received road.

The control unit 230 checks the data throughput of the communication signal received through the first communication unit while performing communication with at least one of the other vehicle and the infrastructure using the communication device 200, On operation.

More specifically, the control unit 230 checks the data throughput of the communication signal received through the first communication unit 210 when performing communication with at least one of the other vehicle and the infrastructure, And if the confirmed data processing rate is less than the first reference processing rate, the second communication unit maintains the communication operation of the first communication unit and performs communication with at least one of the other vehicle and the infrastructure based on the communication signal received through the first communication unit, The switch unit of the communication unit is turned on to change the second communication unit to the communication enabled state and communication is performed with at least one of the other vehicle and the infrastructure based on the communication signal received through the second communication unit.

The communication with the first communication unit includes transmitting and receiving a communication signal through the third antenna 217 of the antenna module.

The data processing rate may be a unit amount of data that can be processed per unit time for outputting the data in the received communication signal.

If the second communication unit is changed to the communicable state by using the maximal ratio combining (MRC) algorithm, the controller 230 selects the optimal communication signal from the communication signal received through the first communication unit and the communication signal received through the second communication unit And recognizes the data of the estimated communication signal.

The maximal ratio combining (MRC) algorithm is a signal combining algorithm for estimating a transmission signal transmitted from another vehicle from received signals received by a plurality of communication units.

When the second communication unit is changed to the communication enabled state, the control unit 230 uses only the communication signal received through the second communication unit, among the communication signal received through the first communication unit and the communication signal received through the second communication unit, Can be recognized.

At this time, the control unit 230 can acquire the situation information of the road based on the recognized data, and obtain the running information of the other vehicle.

The control unit 230 generates data corresponding to the traveling information and the road situation information detected through the detection unit when communicating with an external device using the first communication unit and transmits a digital communication signal corresponding to the generated data to the first signal And transmits it to the processing unit 210a.

The control unit 230 receives the communication signal transmitted from the external device from the first signal processing unit 210a when communicating with the external device using the first communication unit, recognizes the data corresponding to the received communication signal, And provides the corresponding information to the user via the user interface 129. [

The control unit 230 generates data corresponding to the traveling information and the road situation information detected through the detecting unit when communicating with an external device using the second communication unit and outputs a digital communication signal corresponding to the generated data to the second signal To the processing unit 220a.

The control unit 230 receives the communication signal transmitted from the external device from the second signal processing unit 220a when communicating with the external device using the second communication unit, recognizes the data corresponding to the received communication signal, And provides the corresponding information to the user via the user interface 129. [

The control unit 230 periodically checks the data processing rate of the communication signal received by the first communication unit, and turns off the switch unit to change the second communication unit to the communication disabled state if the confirmed data processing rate is equal to or higher than the second reference processing rate.

In addition, the control unit 230 may control the operations of the first communication unit and the second communication unit based on the received signal strength of the communication signal received by the third antenna of the first communication unit.

That is, the control unit 230 checks the received signal strength of the communication signal received through the first communication unit 210 when performing communication with the external device, and maintains the communication operation of the first communication unit when the received signal strength is equal to or greater than the reference signal strength And if the confirmed received signal strength is less than the reference signal strength, the switch unit of the second communication unit is turned on to change the second communication unit to the communication enabled state.

Here, the external device may be any one of the other vehicle 300 and the infrastructure 400.

Here, the control unit 230 may be a control unit provided in a communication device for communication (V2V, V2I) with an external device, and may include a control unit provided in an autonomous drive control device (not shown) of the vehicle, (Not shown) of the control device.

In this embodiment, the configuration in which the switch section is provided in the second communication section has been described as an example, but the switch section of the second communication section may be omitted.

At this time, when the communication execution command with the external device is received, the controller activates both the first communication unit and the second communication unit, and uses the communication signal received by the first communication unit and the communication signal received by the second communication unit, It is possible to recognize the transmitted data and to control the output of information corresponding to the recognized data.

The control unit may change the data to be transmitted to the external device to an electromagnetic wave signal and radiate through the first communication unit when the communication execution command with the external device is received, and may convert the data into an optical signal and output through the second communication unit .

9 is a control flowchart of a vehicle according to an embodiment.

The vehicle performs communication with at least one of the other vehicle and the infrastructure using the antenna module 200a of the first communication unit 210 when a communication execution command with the external device is received (241).

Here, the communication execution command with the external device may include at least one of an execution command of the autonomous mode and an execution command of the information provision mode.

When the communication signal is received (242) through the antenna module (200a) of the first communication unit (210), the vehicle processes the data of the received communication signal and confirms the data processing rate according to the data process included in the communication signal (243) do.

The vehicle compares the identified data throughput with a preset reference throughput and determines whether the confirmed data throughput is greater than a preset first reference throughput (244).

The vehicle maintains (245) the communication operation of the first communication unit to perform communication with at least one of the other vehicle and the infrastructure of the antenna module 200a of the first communication unit if the confirmed data processing rate is equal to or higher than the first reference processing rate.

As shown in FIG. 10, the vehicle 100 performs communication with other vehicles 300 using the antenna module 200a of the first communication unit.

Here, the other vehicle 300 may be located in the first communication area A1 of the vehicle 100. [ Accordingly, the transmission / reception ratio of the communication signal through the antenna module between the vehicle and the other vehicle is high, and the data throughput rate can be high.

When the vehicle is communicating with at least one of the other vehicle and the infrastructure using the first communication unit, the vehicle generates data corresponding to the traveling information and road situation information detected through the detection unit (not shown) Converts the communication signal of the antenna into an electromagnetic wave, and radiates it to the atmosphere through the antenna module.

In addition, the vehicle displays the detected driving information and road condition information through a user interface.

The vehicle recognizes the data of the communication signal received by the first communication unit and acquires the information corresponding to the recognized data and transmits the obtained information to the user interface .

In this way, the vehicle communicates with at least one of the other vehicle and the infrastructure through the first communication unit, thereby providing (246) road condition information to the driver of the own vehicle or the driver of the other vehicle.

The vehicle changes the second communication section to the communicable state by turning on the switch section of the second communication section (246) if the confirmed data processing rate is less than the first reference processing rate.

That is, the vehicle activates the second communication unit.

The vehicle performs communication 247 through the activated second communication unit and performs communication 248 with at least one of the other vehicle and the infrastructure based on the communication signal received through the first communication unit and the second communication unit.

11, the vehicle 100 performs communication with the other vehicles 300 using the antenna module 200a of the first communication unit, and performs communication with the other vehicles 300 using the antenna module 200a of the plurality of optical modules 200b of the second communication unit. And performs communication with the other vehicle 300 located in the second communication area A2 using at least one optical module.

Here, the other vehicle 300 may be located in the second communication area A2 of the vehicle 100. [ Thus, the transmission / reception ratio of the communication signal between the vehicle and the other vehicle through the optical module may be high. On the other hand, since the other vehicle 300 is located outside the first communication area A1 of the vehicle 100, the transmission / reception ratio of the communication signal through the antenna module is low.

The vehicle estimates an optimal communication signal from the communication signal received through the first communication unit and the communication signal received through the second communication unit using a maximal ratio combining (MRC) algorithm and outputs the estimated communication signal data And outputs information corresponding to recognized and recognized data.

That is, when the switch unit is turned on to change the state of the second communication unit to the communicable state, both the first communication unit and the second communication unit become in a communicable state. At this time, the communication signal is received through the first communication unit and the second communication unit, The vehicle can recognize the data by using both the communication signal received by the first communication unit and the communication signal received by the second communication unit, thereby improving the recognition accuracy of the data transmitted from the external device.

The maximal ratio combining (MRC) algorithm is a signal combining algorithm for estimating a transmission signal transmitted from another vehicle from received signals received by a plurality of communication units.

Thus, if the confirmed data processing rate is less than the first reference processing rate, the vehicle communicates with at least one of the other vehicle and the infrastructure through the first and second communication units, thereby providing the driver of the vehicle or the driver of the other vehicle with the road condition information (249).

More specifically, when the vehicle is communicating with at least one of the other vehicle and the infrastructure using the first communication unit and the second communication unit, the vehicle transmits data corresponding to the traveling information detected by the detecting unit (not shown) Converts the digital communication signal corresponding to the generated and generated data into an electromagnetic wave signal, outputs the electromagnetic wave signal through the antenna module, converts the digital communication signal into an optical signal, and outputs the optical signal to the air through the optical module module.

In addition, if the confirmed data processing rate is less than the first reference processing rate, the vehicle can communicate with at least one of the other vehicle and the infrastructure using only the second communication unit. At this time, the data of the communication signal received by the second communication unit is recognized It is also possible to acquire information corresponding to the recognized data and to display the obtained information through the user interface.

The vehicle controls the on / off operation of the second communication unit based on the data processing rate of the communication signal received by the first communication unit during communication through the first communication unit and the second communication unit, and provides the road condition information or performs autonomous driving.

The vehicle periodically checks the data processing rate of the communication signal received by the first communication unit while communicating with the external apparatus through the first and second communication units, and compares the confirmed data processing rate with a predetermined second reference processing rate.

Here, the second reference throughput rate is higher than the first reference throughput rate.

The vehicle determines whether the confirmed data processing rate is greater than or equal to the second reference processing rate. If the determined data processing rate is less than the second reference processing rate, the communication is maintained (250) And maintains communication with the external device.

That is, the vehicle communicates with at least one of the other vehicle and the infrastructure through the first and second communication units, thereby providing the road condition information to the driver of the own vehicle or the driver of the other vehicle (249).

The vehicle changes the state of the second communication unit to the non-communicable state by turning off the switch unit 251 when it is determined that the confirmed data processing rate is equal to or higher than the second reference processing rate.

In other words, the vehicle disables (252) the second communication unit.

The next vehicle communicates with at least one of the other vehicle and the infrastructure through the first communication unit to thereby provide the road condition information to the driver of the own vehicle or the driver of the other vehicle (253).

The communication with the first communication unit includes transmitting and receiving a communication signal through the third antenna 217 of the antenna module 200a.

It is also possible for the vehicle to receive environmental information of the road from other vehicles and infrastructure through the communication device 200 during the information providing mode and to control the display of the environmental information of the received road.

The vehicle performs an autonomous driving function based on the driving information acquired during the autonomous driving mode, the environment information of the obtained road, and the environment information of the road received through the communication device 200.

At this time, the vehicle can control the driving of at least one of a power generating device, a power transmitting device, a traveling device, a steering device, a braking device, a suspension device, a speed change device and a fuel device which are driving devices (not shown).

The vehicle can also search for the route to the destination on the basis of the running information, the environment information of the road, and the environment information of the road that have been checked during the self-running mode, It is also possible to control the display of the information and the environment information of the received road.

12 is a control configuration of a vehicle according to another embodiment. The vehicle includes a user interface 129, a communication device 200, and may further include an obstacle detection unit 140. [ Description of the same configuration as that of the embodiment is omitted.

The obstacle detecting unit 140 detects an obstacle around the vehicle.

The obstacle detecting unit 140 may be a distance detecting unit that detects a distance to an obstacle or an image detecting unit that detects an image of the obstacle.

That is, the vehicle may include at least one of the distance detecting unit and the image detecting unit.

Here, the distance detection unit detects a distance between an object located outside the vehicle, for example, another vehicle traveling around the subject vehicle, a stationary object such as a structure installed around the road, and a vehicle approaching from the opposite lane.

The distance detecting unit may include a LiDAR (Light Detection And Ranging) sensor, a non-contact distance detecting sensor using a laser radar principle, an ultrasonic sensor, or a radar sensor.

The image detecting unit is an apparatus for detecting object information and converting it into an electric image signal. The image detecting unit is an apparatus for detecting object information and converting it into an electric image signal. And transmits the video signal of the detected object information to the control unit 231. [

The image detecting unit may include at least one of a left camera that acquires left and right images, a right camera, and a rear camera that acquires an image of the rear of the vehicle.

The image detecting unit may include a CCD or a CMOS image sensor as the camera, and may include a three-dimensional spatial recognition sensor such as a KINECT (RGB-D sensor), a TOF (Structured Light Sensor), a Stereo Camera .

The control unit 231 can recognize the position of the other vehicle around based on the detection information detected by the distance detection unit and control the operation of the first communication unit and the second communication unit based on the position of the recognized other vehicle. Here, the position of the other vehicle may include the distance of the other vehicle and the direction of the other vehicle based on the vehicle.

The control unit 231 recognizes the surrounding vehicles and infrastructure based on the detection information detected by the image detecting unit, confirms the position of the recognized other vehicle and the location of the infrastructure, 1 communication unit and the second communication unit.

The control unit 231 stores information on the first communication area of the first communication unit and the second communication area of the second communication unit and stores the position of the other vehicle performing communication with the first communication area of the first communication unit, And controls the operation of the first communication unit and the second communication unit based on the information of the second communication area.

If it is determined that the other vehicle is located in the first communication area, the controller 231 communicates with the other vehicle through the first communication unit. If it is determined that the other vehicle is located in the second communication area, Activates the communication unit and communicates with the other vehicle through the second communication unit.

The control unit 231 communicates with the other vehicle through the second communication unit together with the first communication unit.

The control unit 231 estimates an optimal communication signal from the communication signal received through the first communication unit and the communication signal received through the second communication unit using a maximal ratio combining (MRC) algorithm, And outputs information corresponding to the recognized data.

If it is determined that the position of the other vehicle is out of the second communication area, the control unit 231 turns off the switch unit and deactivates the second communication unit.

At this time, the control unit 231 performs communication with the other vehicle using only the first communication unit.

13, the switch unit 220d of the second communication unit includes a plurality of switch units d1, d2, d3, and d4 connected to the plurality of optical modules 200b: b1, b2, b3, can do.

Accordingly, the control unit 231 can activate only the optical module in the direction corresponding to the position by turning on at least one of the plurality of switch units based on the direction of the other vehicle.

The control unit 231 can perform communication with another vehicle using the activated optical module.

The control unit 231 can also turn on all the plurality of switch units when another vehicle is detected, and it is also possible to perform communication with another vehicle through the plurality of optical modules.

In addition, the control unit 231 confirms the position of the subject vehicle received by the GPS receiver, confirms the position of the other vehicle based on the communication signal received by the first communication unit, and based on the position of the subject vehicle and the position of the other vehicle It is also possible to activate the second communication unit.

That is, when it is determined that the other vehicle is located in the second communication area on the basis of the position of the vehicle, the control unit 231 turns on the switch unit to activate the second communication unit, The second communication unit can be deactivated by turning off the switch unit.

100: vehicle 200: communication device
200a: Antenna module 200b: Optical module
300: Other vehicles 400: Infrastructure
500: Server

Claims (21)

A first communication unit having an antenna module and communicating with an external device using the antenna module;
A second communication unit having an optical module and performing communication with the external device using the optical module; And
And a control unit for controlling the operation of the second communication unit based on a data processing rate of the communication signal received by the first communication unit. The apparatus of claim 1,
Controls the operation of the first communication unit so that the first communication unit and the external device communicate with each other if the data processing rate is equal to or higher than a first reference processing rate,
And controlling the operation of the second communication unit so that the second communication unit and the external device communicate with each other if the data processing rate is less than the first reference processing rate. The method according to claim 1,
Further comprising a switch unit disposed between the control unit and the optical module,
Wherein the control unit turns on the switch unit when the data processing rate is less than the first reference processing rate and turns off the switch unit when the data processing rate is the first reference processing rate or more. The apparatus of claim 3,
And recognizing the data based on the communication signal received by the first communication unit and the second communication unit when the switch unit is in an ON state. The apparatus of claim 3,
And when the data processing rate is less than the second reference processing rate, the switch unit is maintained in the on state, and if the data processing rate is equal to or greater than the second reference processing rate, the switch unit is turned off. The apparatus of claim 1,
And converting the communication signal into an electromagnetic wave during the first communication unit operation control and converting the communication signal into light during the second communication unit operation control. The method according to claim 1,
Wherein the first communication unit transmits a communication signal to the first communication area and receives the communication signal of the first communication area,
And the second communication unit transmits a communication signal to a second communication area different from the first communication area and receives the communication signal of the second communication area. Body;
A first communication unit having an antenna module provided in the vehicle body to transmit and receive a communication signal in a first communication area using the antenna module;
A second communication unit having an optical module provided in the vehicle body and transmitting and receiving a communication signal in a second communication area different from the first communication area using the optical module; And
And controls the operation of the first communication unit so that the first communication unit and the external device communicate with each other if the confirmed data processing rate is equal to or greater than the first reference processing rate, And controls the operation of the second communication unit when the data processing rate is less than the first reference processing rate. 9. The method of claim 8,
Further comprising a switch unit disposed between the control unit and the optical module,
Wherein the control unit turns on the switch unit when the data processing rate is less than the first reference processing rate and turns off the switch unit when the data processing rate is the first reference processing rate or more. 10. The apparatus according to claim 9,
Recognizing data based on a communication signal received by the first communication unit when the switch unit is in the off state and recognizing data based on the communication signal received by the first communication unit and the second communication unit when the switch unit is on Included vehicles. 11. The apparatus according to claim 10,
Estimating a communication signal transmitted from the external device from the communication signal received through the first communication unit and the communication signal received through the second communication unit using the maximum rate combining algorithm when the switch unit is on, And recognizing data of the signal. 11. The apparatus according to claim 10,
And when the data processing rate is less than the second reference processing rate, maintaining the ON state of the switch unit when the switch unit is on and turning off the switch unit when the data processing rate is the second reference processing rate or more. 10. The apparatus according to claim 9,
And recognizing the data based on the communication signal received by the first communication unit when the switch unit is in the OFF state and recognizing the data based on the communication signal received by the second communication unit when the switch unit is ON. 9. The method of claim 8,
Wherein the first communication unit transmits a communication signal to the first communication area and receives the communication signal of the first communication area,
And the second communication unit transmits a communication signal to the second communication area and receives the communication signal of the second communication area. 9. The method of claim 8,
Further comprising an obstacle detection unit for detecting an obstacle,
Wherein the control unit acquires the position of another vehicle based on the detection information of the obstacle detection unit and controls the operation of the second communication unit based on the obtained position. A control method of a vehicle for performing communication with another vehicle,
A communication signal is received using an antenna module provided in a vehicle body,
Checking the data throughput of the received communication signal,
And performing communication with another vehicle using the antenna module if the confirmed data processing rate is equal to or greater than a first reference processing rate,
And communicating with the other vehicle using the optical module provided in the vehicle body when the confirmed data processing rate is less than the first reference processing rate. 17. The method of claim 16, wherein performing communication with the other vehicle using the optical module comprises:
And activating the optical module by turning on a switch connected to the optical module if the data throughput is less than a first reference throughput. The method of claim 17, wherein performing communication with the other vehicle using the optical module comprises:
Periodically checks the data processing rate of the communication signal received by the first communication unit,
If the determined data processing rate is less than the second reference processing rate,
And turning off the switch unit to deactivate the optical module if the data processing rate is not less than the second reference processing rate. The method of claim 17, wherein performing communication with the other vehicle using the optical module comprises:
Estimating a communication signal transmitted from the other vehicle from the communication signal received by the antenna module and the communication signal received by the optical module using a maximum rate combining algorithm when the switch section is on,
And recognizing data of the estimated communication signal. 17. The method of claim 16, wherein performing communication with another vehicle using the antenna module comprises:
Converts the electromagnetic wave received by the antenna module into a digital communication signal,
And recognizing data based on the converted communication signal. 17. The method of claim 16, wherein performing communication with the other vehicle using the optical module comprises:
Converts the optical signal received by the optical module into a digital communication signal,
And recognizing data transmitted from the other vehicle based on the converted digital signal.

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