WO2022139036A1

WO2022139036A1 - Wireless repeater for in-vehicle wireless transmission and wireless data transmission method using same

Info

Publication number: WO2022139036A1
Application number: PCT/KR2020/019083
Authority: WO
Inventors: 송기동; 은기찬
Original assignee: 지앨에스 주식회사
Priority date: 2020-12-23
Filing date: 2020-12-24
Publication date: 2022-06-30
Also published as: KR102559532B1; KR20220090874A

Abstract

A wireless repeater according to an embodiment of the present invention includes a wireless repeater which is wirelessly connected to a vehicle convenience device including a front/rear monitoring camera or a vehicle ECU and a navigation terminal, and wirelessly receives vehicle data from the vehicle convenience device so as to wirelessly transmit same to a portable device, wherein data transmission between the portable device and the vehicle convenience device is relayed by ultra-high frequency communication and wireless transmission is performed.

Description

Wireless repeater for in-vehicle wireless transmission and wireless data transmission method using the same

The present invention relates to a wireless repeater for in-vehicle wireless transmission, and more particularly, to a wireless repeater capable of wirelessly transmitting various vehicle data in a vehicle through ultra-high frequency communication with a portable device and a wireless data transmission method using the same will be.

In recent years, with the rapid development of the electronic communication field, automobiles are equipped with many electronic communication devices to the extent that automobiles are called a kind of electronic device to promote driver convenience and safety. This is proposed. This vehicle rear camera system mounts a camera on the rear of the vehicle so that the lens faces the rear of the vehicle, and outputs the screen shot from such a camera to a display device such as a monitor installed near the driver's seat through a wired connection in real time. It is a system that promotes safe driving by notifying the driver of the situation behind the vehicle.

However, such a conventional rear monitoring camera system has a disadvantage that a wired cable for video signal transmission must be installed in the vehicle, and thus a separate wiring work is required. have.

In addition, since the internal structure of each vehicle is different, a standard rear surveillance camera system for automobiles cannot be used, and there is a problem in that each automobile manufacturer must separately purchase a rear surveillance camera system suitable for the relevant automobile specifications.

Meanwhile, a millimeter wave (mm wave), which has recently been spotlighted in short-distance communication, is an extremely high frequency (EHF), a radio wave having a wavelength of 1 to 10 mm and a frequency of 30 to 300 GHz.

The main characteristics of millimeter waves are:

Since the frequency is high, broadband transmission is possible, and since the wavelength is short, miniaturization and weight reduction of the antenna and transmission/reception device are possible, and the frequency reuse rate is high.

However, it is not suitable for long-distance communication due to its strong straightness, and as a lot of signal attenuation occurs due to atmospheric factors, it is greatly affected by geographic climate and seasons, so it is suitable for short-distance communication & small communication device configuration for high-speed/large-capacity transmission do.

In particular, the usage scenario that 60GHz WPAN (Wireless Personal Area Network) communication is targeting is high-speed transmission of data based on close proximity, and Near Field Communication (NFC), which stipulates communication within a distance of 10cm ) technology, but it has a comparative advantage that cannot be compared in transmission speed.

However, in order to overcome the shortcomings of linearity of 60 GHz communication, alternatives such as beam forming of an antenna have been proposed, but in the case of beam forming, there is a problem of consuming too much power and dissipating a lot of heat. .

However, since it is essential to rely on a wired cable to transmit high-capacity data, there is a problem that causes inconvenience such as cable kinking and user movement due to cable connection. , data loss, etc.

Therefore, in order to solve this problem, there is a need to develop a method capable of increasing user convenience as well as data communication between devices in a vehicle without interruption by short-distance wireless data communication using ultra-high frequency.

An object of the present invention is to provide a wireless repeater for wireless transmission between a portable device and a vehicle convenience device by ultra-high frequency communication, and to relay vehicle-related data wirelessly transmitted from the vehicle convenience device through the wireless repeater to wirelessly transmit to the portable device. To provide a wireless repeater and a wireless data transmission method using the same.

The wireless repeater according to an embodiment of the present invention is wirelessly connected to a vehicle convenience device including a navigation terminal, a front/rear monitoring camera, or a vehicle ECU, and wirelessly receives vehicle data from the vehicle convenience device and wirelessly transmits it to a portable device It characterized in that it comprises a wireless repeater, characterized in that the data transmission between the portable device and the vehicle convenience device is relayed by very high frequency communication for wireless transmission.

The wireless repeater provides a communication environment for performing ultra-high frequency communication with a portable device, and in a state of being wirelessly linked with the portable device, a communication unit for relaying wireless transmission of vehicle data from a vehicle convenience device to the portable device; a control unit for receiving a request from the portable device, transmitting a signal, and performing communication with the corresponding portable device by accepting a handover when the portable device requests a handover; The portable device includes a signal generator that checks a signal according to the state of the wireless repeater and transmits the signal to the surroundings at a predetermined period to determine whether the corresponding wireless repeater is in a good signal state to generate a state signal capable of reporting its state.

The communication unit includes: a data collection unit for receiving command data related to communication operation control from the control unit; It further includes a module for transmission and a module for reception that receives the microwave electromagnetic wave according to the command data.

The transmission module includes an oscillator (VCO, PLL) that generates a very high frequency electromagnetic wave signal, a modulator that performs modulation based on the signal generated by the oscillator, and an amplifier that amplifies the modulated ultra high frequency electromagnetic wave signal received from the modulator. (PA), and an antenna for transmitting the amplified ultra-high frequency electromagnetic wave signal.

When the vehicle convenience device is a vehicle ECU, when performing ultra-high frequency communication with the portable device through a wireless repeater, vehicle operation parameters (running information, failure information, and consumable information) through a vehicle management app installed and executed in the portable device In the navigation-linked app installed and executed in the portable device or through wireless communication and data transmission with the vehicle ECU for the at least one) To enable wireless transmission of at least one function through ultra-high frequency wireless communication, or to wirelessly transmit image data obtained from front/rear cameras through a wireless repeater in a camera monitoring app installed and executed on the portable device characterized.

The wireless repeater is provided in plurality, and the portable device is a wireless communication unit designed in the form of a communication chip to perform ultra-high frequency communication with the wireless repeater, and a wireless that selectively controls according to the signal strength of signals received from multiple wireless repeaters It includes a control unit, and the vehicle convenience device is characterized in that it is provided with a separate internal communication chip to enable ultra-high frequency communication between wireless repeaters.

In the data transmission method using a wireless repeater according to an embodiment of the present invention, the portable device transmits a signal to a wireless repeater located in a receivable range to request signal transmission for communication, and communicates by acceptance from the wireless repeater Receiving a signal for; measuring, by the portable device, the signal strength of the received signal, and determining whether the signal strength exceeds a preset stored signal strength; checking a wireless repeater that has transmitted a signal strength that satisfies a reference signal strength among the signals of the multiple wireless repeaters, through a unique identification code of the wireless repeater included in the signal; performing, by the portable device, communication by selection control so as to handover to a corresponding wireless repeater that has transmitted a signal strength that satisfies a reference signal strength; The corresponding wireless repeater selectively controlled by the handover includes receiving the vehicle data requested by the portable device from the vehicle convenience device and retransmitting the vehicle data to the portable device.

A data transmission method using a wireless repeater according to another embodiment of the present invention includes: periodically transmitting a status signal from a plurality of the wireless repeaters; checking whether the portable device has received the status signal; The method further includes performing, by the portable device, a handover to communicate with a corresponding wireless repeater through which the status signal is received for a predetermined period.

In the above, when the portable device has a plurality of wireless repeaters that satisfy the reference signal strength, calculating a signal strength value; The portable device further includes the step of performing handover in order to select a wireless repeater having the largest signal strength value for communication.

The present invention has the advantage of being able to configure a wireless repeater to enable high-capacity wireless transmission of high-capacity vehicle data at high speed and straightness without interruption to the user, even without using a plurality of antennas in the form of a group like the beamforming method.

In addition, since the wireless repeater capable of ultra-high frequency communication acts as a relay between the portable device and the vehicle convenience device, data transmission is possible wirelessly without adding a separate communication device. It is possible to establish an ultra-high frequency communication environment with the wireless repeater by simply installing the device and the vehicle convenience device.

1 is a block diagram for explaining the overall connection structure of a wireless repeater, a portable device, and a vehicle convenience apparatus according to an embodiment of the present invention.

FIG. 2 is a view showing detailed configurations of the wireless repeater and the portable device of FIG. 1 .

3 is a view showing the detailed configuration of the communication unit and the transmission module of FIG. 2 .

4 is a flowchart illustrating a wireless data transmission method using a wireless repeater according to an embodiment of the present invention.

5 is a flowchart illustrating a wireless data transmission method using a wireless repeater according to another embodiment of the present invention.

6 is a diagram illustrating an internal configuration when the communication unit of FIG. 2 is designed in the form of a communication chip.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention may add, change, delete, etc. other elements within the scope of the same spirit, and may use other degenerative inventions or the present invention. Other embodiments included within the scope of the invention may be easily proposed, but this will also be included within the scope of the invention. In addition, components having the same function within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

1 is a block diagram for explaining as a whole a connection structure of a wireless repeater, a portable device, and a vehicle convenience device according to an embodiment of the present invention, and FIG. 2 is a view showing the detailed configuration of the wireless repeater and the portable device of FIG. , FIG. 3 is a view showing the detailed configuration of the communication unit and the transmission module of FIG. 2 .

The wireless repeater 100 of the present invention is wirelessly connected to the portable device (HMD, 200) and the vehicle convenience apparatus 300 to perform ultra-high frequency communication.

The portable device 200 may be connected to the vehicle convenience device 300 to receive various vehicle data wirelessly.

Here, the portable device 200 may be a wireless communication device with guaranteed portability and mobility, for example, all kinds of handheld-based wireless communication such as a smart phone, a phablet phone, a tablet, a notebook computer, and the like. It may be a device. Also, the 'portable device' may be a wired communication device such as a PC that can be connected to another terminal or server through a network.

In addition, the vehicle convenience device 300 is a device that provides various types of in-vehicle user convenience, and includes a front/rear camera device (black box), a navigation terminal, and an electronic control unit (ECU). It may be image data, navigation-linked data, vehicle status information (part status information, diagnostic information, etc.) through ECU.

In addition, at this time, by applying the wireless repeater 100 of the present invention to relay data transmission between the portable device 200 and the vehicle convenience device 300 by ultra-high frequency communication, it can be designed to enable seamless data transmission even in a wireless state. have.

Referring to FIG. 2 , the wireless repeater 100 includes a communication unit 110 , a control unit 120 , and a signal generation unit 130 .

The communication unit 110 may be manufactured in the form of a small communication chip or communication module having a size of several millimeters in a 30 to 300 GHz band, preferably a 60 GHz band, for transmitting and receiving very high frequencies.

The ultra-high-speed proximity communication method for ultra-high frequency transmission/reception applied at this time can comply with IEEE 802.15.3e HRCP (High-Rate Close Proximity Point to Point Communication). up to 7 Gbps and 14 Gbps.

In addition, the wireless repeater 100 including both the communication unit and other components (control unit, etc.) can be manufactured in the form of a communication chip, and the chipset is LTCC (Low Temperature) applied with a 60GHz chipset to have a high dielectric constant in the 60GHz band for high-speed proximity communication. It is designed as a Co-fired Ceramic) board, and a 60GHz chipset is mounted. If necessary, it can be manufactured to further include a USB interface and DP port for external device connection or firmware upgrade.

The portable device 200 may include a wireless communication unit 210 designed in the form of a separate communication chip to perform ultra-high frequency communication with the above-described wireless repeater, and the wireless controller 220 of the portable device 200 is multi-wireless. It performs the function of selectively controlling according to the signal strength from the repeater.

Specifically, the wireless controller 220 requests a signal for communication from the multiple wireless repeaters 100 located within a communicable range, and receives a signal for communication from the multiple wireless repeaters 100 through the wireless communication unit. It is determined whether the signal strength is exceeded, and the wireless repeater 100 satisfying the reference signal strength is checked.

In addition, when there are a plurality of wireless repeaters 100 satisfying the reference signal strength, the wireless controller 220 calculates the reception strength through the signal measurement unit 230 unit, and the wireless repeater 100 with the highest reception strength strength and a selection control command to perform handover.

Here, the reference signal strength may be a signal strength threshold value of a wireless communication link or a communication signal strength value capable of smooth data communication.

In addition, the wireless controller 220 receives and pre-stores a unique identification code for each wireless repeater 100 in order to check the wireless repeater 100 that satisfies the reference signal strength, and selects the corresponding wireless repeaters 100 by classification. handover can be performed.

To this end, the wireless controller 220 may include a function for measuring the signal strength of the received signal and determining whether the reference signal strength is satisfied.

That is, when the signal strength of the received signal exceeds the reference signal, it is determined that the signal is good, and when the signal strength of the received signal does not exceed the reference signal, it can be determined that the signal is bad.

Furthermore, the portable device 200 may perform a signal request for communication to the wireless repeater 200 and whether the wireless repeater 200 receives a status signal. In this case, by setting the transmission period of the status signal of the wireless repeater 200 to be long, both the signal for communication and the status signal received by the signal request for communication are checked, and if both are satisfied (signal for communication) In case of exceeding the reference signal strength of , and when the status signal is normally received), a handover may be performed to communicate with the corresponding wireless repeater 200 .

Furthermore, the portable device 200 may control the state of the wireless repeater 100 to select the wireless repeater 100 to be handed over according to the reliability of the communication link by classifying noise as well as signal strength.

For example, when the reliability of the communication link exceeds a preset reliability reference value, it may be determined as a reliable case. Here, as the criterion for evaluating the reliability, at least one of received signal strength indicator (RSSI), cyclic redundancy checking (CRC), and signal to noise ratio (SNR) information may be used.

The wireless repeater 100 may relay the wireless transmission of vehicle data from the vehicle convenience device 300 by ultra-high frequency communication and transmit it to the portable device 200, in consideration of the directivity characteristics of the ultra-high frequency communication. It is preferable to be installed in a place where communication with the convenient device 300 can be made smoothly.

The communication unit 110 provides a communication environment for performing ultra-high frequency communication with the portable device 200 described above.

When the wireless repeater 100 is installed to be multiple and spaced apart from each other in order to provide a smooth environment of communication in consideration of the linearity characteristic of ultra-high frequency communication, one wireless repeater 100 is connected by selection control of the portable device 200. As a reference for this, when a signal for communication as described above is requested, by transmitting to the portable device 200, communication can be performed under selective control.

In addition, as another embodiment for receiving selection control, the communication unit 110 periodically transmits a heart beat signal to the portable device 200, and the provided signal bit includes a unique identification code of the corresponding wireless repeater 100. It can be transmitted to include.

In addition, the communication unit 110 relays the wireless transmission of vehicle data from the vehicle convenience apparatus 300 in a state in which the portable device 200 is wirelessly linked (the state in which the portable device 200 is selected and controlled) to be transmitted to the portable device 200 . can be sent to

Furthermore, as shown in FIG. 3 , the communication unit 110 includes a data collection unit 111 that receives command data related to communication operation control from the control unit 120 , and the command data received from the data collection unit 111 . It further includes a control module 112 for transmitting the to the transmission module, a transmission module 113 for transmitting a very high frequency electromagnetic wave according to command data, and a receiving module 118 for receiving an ultra high frequency electromagnetic wave according to the command data.

In addition, the transmission module 113, referring to FIG. 3 , an oscillator (VCO, PLL, 114) that generates an ultra-high frequency electromagnetic wave signal, and a modulator that performs modulation based on the signal generated by the oscillator 114 (Modulator, 115), an amplifier (PA) 116 for amplifying the modulated very high frequency electromagnetic wave signal received from the modulator 115, and an antenna 117 for transmitting the amplified very high frequency electromagnetic wave signal. In addition, the receiving module 118 also performs the same configuration and function for receiving-side communication similarly to the transmitting module 113 .

In addition, the oscillator 114 is a voltage-controlled oscillator that generates a signal of a 60 GHz band, which is an ultra-high frequency, and can prevent frequency fluctuation and can be varied to a desired frequency, and in particular, a phase locked loop (PLL) for fixing the 60 GHz frequency may be further included. .

The modulator 115 performs demodulation, and specifically, on-off keying (OOK) modulation.

In addition, the detailed configurations 111 to 118 of the communication unit 110 described above are representatively described, and the wireless communication unit 110 of the portable device 200 or the vehicle convenience device 300 to enable mutual ultra-high frequency communication. The same may be applied to an internal communication chip (not shown).

Two or more wireless repeaters 100 are provided in order to selectively communicate by selection control of the portable device 200, and the wireless repeaters 100 at positions opposite to the portable device 200 may be disposed to be spaced apart from each other have.

In this way, in a state in which the wireless repeaters 100 are disposed to be spaced apart from each other, the portable device 200 may receive different signal strengths received from the wireless repeaters 100 according to the straightness characteristics of the ultra-high frequency signal.

In addition, in the embodiment of FIG. 1 , a case in which there are three wireless repeaters 100 (first to third wireless repeaters 100 ) is exemplified, but the number of wireless repeaters 100 depends on the installation location, portable device 200 ) may vary depending on the model type or communication state of the vehicle convenience device 300 , and the present invention is not limited to a specific number.

The controller 120 may receive a request from the portable device 200 and transmit a signal, and when the portable device 200 requests a handover, it may communicate with the portable device 200 by accepting the handover.

The wireless repeater 100 periodically transmits a status signal to the portable device 200 .

That is, the wireless repeater 100 transmits a status signal generated through the signal generator 230 provided therein at a predetermined period to inform the surroundings of its signal status, and the portable device 200 receives the status signal. and check the signal strength of the corresponding state signal to determine whether the corresponding wireless repeater 100 is in a good signal state.

Also, the controller 120 may perform a transmission command of vehicle data received from the vehicle convenience apparatus 300 to the portable device 200 .

In addition, the portable device 200 and the communication chip performing the communication function of the vehicle convenience device 300, referring to FIG. 6, to perform ultra-high frequency communication with the communication unit 110 of the wireless repeater 100, input signal (vehicle A modem that packages and interprets data) according to a wired/wireless communication protocol, a serial-to-parallel converter (SERDES) that performs serialization for high-speed transmission of packaging signals, an RF module that mixes serialized signals with a 60 GHz carrier frequency, and mixing signals. An antenna for transmitting to the wireless repeater 100 may be further provided. A deserializer can improve data processing speed through serialization of signals.

In addition, the configuration of the modem and the like may be configured to be equally applied to the wireless repeater 100 .

Furthermore, in order to perform ultra-high frequency communication with the wireless repeater 100, the portable device 200 and the vehicle convenience device 300 are modularized and mounted inside the communication chip form, not in the form of an externally mounted dongle or connector. It may be implemented, and in the form of a dongle or hub, USB, DP, and HDMI terminals may be further included as input/output ports for separately mounting.

Furthermore, when the vehicle convenience device 300 is a vehicle ECU, when performing ultra-high frequency communication with the portable device 200 such as a smart phone through the wireless repeater 100, it is installed in the smart phone and executed through the vehicle management app. Wireless communication and data transmission with the ECU can take place.

Specifically, for example, in a vehicle management app installed and executed on a smartphone, vehicle operation parameters (driving information, fault information, consumable information, etc.), errors, A still image may be provided through an app screen implemented in the form of a graphic user interface (GUI), and additionally, a diagnosis result screen, vehicle acceleration measurement result, and fuel economy statistics screen may be provided.

As another example, in a navigation-linked app (Google Auto, Apple CarPlay, etc.) installed and executed on a smartphone, functions such as a voice assistant function such as Google Assistant and a music/radio/news playback service as well as navigation screen settings It also enables seamless wireless data transmission without cable connection through ultra-high frequency wireless communication.

As another example, in a camera monitoring app installed and executed on a smartphone, image data acquired from front/rear cameras can be wirelessly transmitted through a wireless repeater, and real-time for high-definition, high-capacity camera images by seamless ultra-high frequency communication It can also be implemented to enable camera monitoring.

Furthermore, the front/rear camera may further include an image converter for encoding when transmitting a camera image, and the image converter converts the input image into image data conforming to a video signal standard of a pre-specified format, and a video signal of a pre-specified format The standard may be, for example, a video signal standard suitable for NTSC, PAL or SECAM or ATSC or DVB or MPEG-2 or MPEG-4 or H.263.

In addition, in addition to the example described above as the vehicle convenience device 300, the in-vehicle instrument panel, head-up display (HUD), vehicle components (door, trunk door), etc. are linked through the wireless repeater 100 and wirelessly to the portable device 200 Data transmission or a door on/off function by wireless remote control in the connected portable device 200 may be performed.

First, the portable device 200 transmits a signal to multiple wireless repeaters 100 located in a receivable range to request signal transmission for communication, and transmits a signal for communication by accepting from the multiple wireless repeaters 100. A signal is received (S100).

Here, the signal for communication may be an ACK type signal having only a unique identification code of the wireless repeater 100 that does not include data.

The portable device 200 measures the signal strength of the received signal, and determines whether the signal strength exceeds the preset stored signal strength (S102).

The wireless repeater 100 that has transmitted the signal strength satisfying the reference signal strength among the signals of the multiple wireless repeater 100 is checked through the unique identification code of the wireless repeater 100 included in the signal (S104).

If there are a plurality of wireless repeaters 100 that satisfy the reference signal strength, the numerical value of the signal strength is calculated, and the wireless repeater 100 with the largest signal strength value (the wireless repeater 100 with the best signal condition) is selected. A handover is performed to select and communicate (S106, S108).

The portable device 200 performing handover transmits a handover request message to the wireless repeater 100 to be handed over, and transmits a handover acceptance message to the portable device 200 from the wireless repeater 100 side, This may include a process in which the portable device 200 confirms the handover.

The wireless repeater 100 selectively controlled by handover receives the vehicle data requested by the portable device 200 from the vehicle convenience device 300 and performs a relay role of retransmitting it to the portable device 200 (S110).

The multiple wireless repeater 100 periodically transmits its own state signal (heart beat signal) (S200).

The portable device 200 checks whether the transmitted status signal is received (S202).

The portable device 200 performs handover to communicate with the wireless repeater 100 that receives the status signal for a predetermined period (S204).

In addition, if there are a plurality of wireless repeaters 100 that receive a status signal for a certain period, the portable device 200 measures the signal strength of the status signal, calculates a signal strength value, and transmits the highest signal strength. Handover may be performed by selecting the repeater 100 .

The wireless repeater 100 selectively controlled by handover performs a relay role of receiving and retransmitting vehicle data requested by the portable device 200 from the vehicle convenience device 300 (S206).

[Explanation of code]

100 ; wireless repeater

110 ; communication department

111; data collection unit

112 ; control module

120 ; control

130 ; measuring part

200 ; portable device

300 ; Vehicle Convenience Device

Claims

A navigation terminal, a front/rear monitoring camera, or a wireless repeater that is wirelessly connected to a vehicle convenience device including a vehicle ECU, receives vehicle data wirelessly from the vehicle convenience device and wirelessly transmits it to a portable device,

the wireless repeater

A wireless repeater, characterized in that the data transmission between the portable device and the vehicle convenience device is relayed through ultra-high frequency communication for wireless transmission.
According to claim 1,

the wireless repeater

a communication unit that provides a communication environment for performing ultra-high frequency communication with a portable device, and relays wireless transmission of vehicle data from a vehicle convenience device to the portable device in a state of being wirelessly linked with the portable device;

a control unit for receiving a request from the portable device, transmitting a signal, and performing communication with the corresponding portable device by accepting a handover when the portable device requests a handover;

A signal generating unit that checks a signal according to the state of the wireless repeater in the portable device and transmits it to the surroundings at a predetermined period to determine whether the corresponding wireless repeater is in a good signal state to generate a state signal that can inform its state

A wireless repeater comprising a.
3. The method of claim 2,

the communication unit

A data collection unit for receiving command data related to communication operation control from the control unit, a control module for transmitting the command data received from the data collection unit to a transmission module, and a transmission module for transmitting ultra-high frequency electromagnetic waves according to the command data , Wireless repeater further comprising a receiving module for receiving the ultra-high frequency electromagnetic wave according to the command data.
4. The method of claim 3,

The transmission module is

An oscillator (VCO, PLL) that generates a very high frequency electromagnetic wave signal, a modulator that performs modulation based on the signal generated by the oscillator, and an amplifier (PA) that amplifies the modulated very high frequency electromagnetic wave signal received from the modulator; A wireless repeater further comprising an antenna for transmitting the amplified ultra-high frequency electromagnetic wave signal.
According to claim 1,

When the vehicle convenience device is a vehicle ECU, when performing ultra-high frequency communication with the portable device through a wireless repeater, vehicle operation parameters (running information, failure information, and consumable information) through a vehicle management app installed and executed in the portable device wireless communication and data transmission with the vehicle ECU for

In the navigation-linked app installed and executed on the portable device, at least one function of a navigation screen setting function, a voice assistant function, and a music/radio/news playback service is wirelessly transmitted through ultra-high frequency wireless communication,

In the camera monitoring app installed and executed in the portable device, the wireless repeater, characterized in that the image data obtained from the front/rear camera is wirelessly transmitted through the wireless repeater.
According to claim 1,

The wireless repeater is provided in plurality,

The portable device is

A wireless communication unit designed in the form of a communication chip to perform ultra-high frequency communication with the wireless repeater, and a wireless control unit that selectively controls according to the signal strength of signals received from multiple wireless repeaters,

The vehicle convenience device is a wireless repeater, characterized in that provided with a separate internal communication chip to enable ultra-high frequency communication between the wireless repeaters.
In the data transmission method using the wireless repeater of any one of claims 1 to 6,

The portable device transmits a signal to a wireless repeater located in a receivable range, requests signal transmission for communication, and receives a signal for communication by accepting from the wireless repeater;

measuring, by the portable device, the signal strength of the received signal, and determining whether the signal strength exceeds a preset stored signal strength;

checking a wireless repeater that has transmitted a signal strength that satisfies a reference signal strength among the signals of the multiple wireless repeaters, and checking through a unique identification code of the wireless repeater included in the signal;

performing, by the portable device, communication by selection control so as to handover to a corresponding wireless repeater that has transmitted a signal strength that satisfies a reference signal strength;

receiving, by the wireless repeater selectively controlled by the handover, the vehicle data requested by the portable device from the vehicle convenience device, and retransmitting the vehicle data to the portable device;

A wireless data transmission method using a wireless repeater comprising a.
7. The method of claim 6,

periodically transmitting a status signal from the plurality of wireless repeaters;

checking whether the portable device has received the status signal;

performing, by the portable device, a handover to communicate with a corresponding wireless repeater through which the status signal is received for a predetermined period

A wireless data transmission method using a wireless repeater further comprising a.
8. The method of claim 7,

If the portable device has a plurality of wireless repeaters that satisfy the reference signal strength, calculating a signal strength value;

The portable device selects a wireless repeater having the largest signal strength value and performs handover to communicate

A wireless data transmission method using a wireless repeater further comprising a.