KR20090130616A - Vehicle communication antenna system based on location and method for transmitting/receiving radio wave - Google Patents

Abstract

PURPOSE: A vehicle communication antenna system based on a position and a method for transmitting/receiving a radio wave are provided to omit a process for setting an antenna direction by setting a direction of an antenna according to a service and a road condition. CONSTITUTION: A direction determining part(704) determines a direction for transmitting/receiving a radio wave based on at least one information among road information and service information. A transmitting/receiving part transmits/receives the radio wave to the determined direction. A service information maintaining part(701) maintains service information corresponding to at least one service among all services. A service information confirming part(702) confirms the service information corresponding to the service to be provided. A road information obtaining part obtains road information from a navigation system.

Description

VEHICLE COMMUNICATION ANTENNA SYSTEM BASED ON LOCATION AND METHOD FOR TRANSMITTING / RECEIVING RADIO WAVE}

The present invention relates to a vehicle communication antenna system and a radio wave transmission / reception method based on location, and more particularly, to an antenna system capable of adjusting a directional antenna according to a state of a road to be progressed or a service to be provided based on the location of a vehicle. A transmission / reception method that may be performed in an antenna system.

Smart antenna is an antenna that transmits and receives a specific signal in a desired direction by controlling the phase of the arrayed antenna.It provides independent beam between transmission and reception to maximize the amount of radio waves in the desired direction and minimizes the other direction to greatly attenuate noise of the received signal. It is effective in improving call quality, maximizing communication capacity, and extending battery life due to low power calls. This beamforming technique is used to provide an optimal beam by installing an array antenna at a station and independently calculating an optimal weight for each destination node.

As a method for beamforming toward a desired user, there are a switched beamforming method and an adaptive beamforming method. In the switched beamforming method, beamforming is performed by setting weight vectors for several directions in advance, and the adaptive beamforming method uses weight vectors according to desired user positions to maximize a ratio of a desired user signal to an interference signal. It keeps updating. In this case, various adaptive algorithms are used to calculate a weight vector for beamforming. Generally, there is a method of obtaining a weight vector by a DOA (Direction of Arrival) and a method of obtaining a weight vector by a time reference, and a highly digital signal processor (DSP) for real-time calculation of a weight vector for beamforming. ) Processing technology is required.

These conventional directional antennas are weighted according to the strength of the radio wave or the signal-to-noise ratio and determine the directionality according to the calculated arrangement. It was developed around satellite communication or mobile communication network. However, in the field of vehicle communication (V2V or V2I), which is actively progressing in the Intelligent Transport System (ITS) industry recently, it is necessary to use a more suitable directional antenna in view of the specialty of road environment and fast connection. . In the present specification, an antenna system capable of efficiently controlling a directional antenna and a transmission / reception method in the antenna system are proposed.

The present invention is to determine the state of the road to proceed based on the location of the vehicle, and to set the direction of the antenna according to the service and the road environment to be transmitted when the data to be transmitted by the vehicle, processing process for the antenna direction setting The present invention provides an antenna system and a method of transmitting and receiving a signal, which can reduce the number and obtain the effect of channel reuse.

The present invention is based on the direction of the antenna based on the number of lanes, the width of the road, the road information such as the destination of the data or the service information on the use of the service to send such as intersection warning service, forward vehicle information providing service, accidental backward transmission service The present invention provides an antenna system and a transmission / reception method capable of controlling the strength of a radio wave and a communication speed.

An antenna system according to an embodiment of the present invention includes a direction determiner for determining a direction for transmitting and receiving a radio wave based on at least one of road information and service information, and a transceiver for transmitting and receiving radio waves in the determined direction.

According to one aspect of the invention, the road information may include state information of the road based on the current location. Here, the state information of the road may include at least one of a road width, a car, an intersection, an access road, a location of roadside equipment (RSE), and vehicle information in the road.

According to an aspect of the present invention, the service information may include information on at least one service among all services that can be provided during operation of the vehicle, such as an intersection warning service, a forward vehicle information providing service, and an accidental backward transmission service. .

According to an aspect of the present invention, the antenna system is a service information maintenance unit for maintaining service information corresponding to at least one service among all services that can be provided during the operation of the service and a service for identifying service information corresponding to the service to be provided. The information confirmation unit may further include.

According to an aspect of the invention, the antenna system may further include a road information acquisition unit for obtaining the road information from the associated navigation system.

According to an aspect of the present invention, the transmission and reception unit may transmit a radio wave in the determined direction or receive a radio wave through the antenna by adjusting at least one of the direction of the antenna or the phase, angle, intensity, and speed of the radio wave.

According to one aspect of the invention, the switching unit for switching the omni-directional antenna and the directional antenna based on at least one of the road information, the service information and the determined direction.

The transmission and reception method according to an embodiment of the present invention includes determining a direction for transmitting and receiving radio waves based on at least one of road information and service information, and transmitting and receiving radio waves in the determined direction.

According to the present invention, by determining the state of the road to proceed based on the location of the vehicle and by setting the direction of the antenna to the service and the road environment to be transmitted when the data to be transmitted by the vehicle, by setting the direction of the antenna The processing process can be reduced and channel reuse can be achieved.

According to the present invention, the antenna is based on the service information on the purpose of the service to be sent, such as the number of lanes, the width of the road, the road information such as the destination of the data or the intersection warning service, the forward vehicle information providing service, and the accidental backward transmission service. You can adjust the direction of the wave, the strength of the radio wave and the communication speed.

Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a general use environment of the antenna system according to an embodiment of the present invention. The antenna system 101 according to an embodiment of the present invention may be included in the vehicle 102 and used to communicate with other vehicles or roadside equipment (RSE) as shown in FIG. 1. At this time, the antenna system 101 is connected to the navigation system 103 to determine the state of the road to proceed based on the position of the vehicle 102 (for example, the car, the intersection, the access road, the location of the roadside device, etc.). The antenna system 101 may determine the direction of the antenna according to the state of the road or the service when transmitting a signal or transmitting data according to the service provided to the vehicle 103. The phase, angle, strength, speed, etc. of the radio wave may be adjusted according to the state of the road or the purpose of the service.

2 is a flowchart illustrating a transmission and reception method according to an embodiment of the present invention. Here, the transmission and reception method according to an embodiment of the present invention may be performed by the antenna system according to an embodiment of the present invention. In FIG. 2, the transmission and reception method will be described by describing a process in which each step is performed by the antenna system.

In step S201, the antenna system maintains service information corresponding to at least one service among all services that can be provided while the vehicle is in operation. In this case, the service information may include information on at least one service among all services that can be provided during the operation of the vehicle, such as an intersection warning service, a forward vehicle information providing service, and an emergency situation backward transmission service. For example, the antenna system may maintain a service name or service identifier for the intersection warning service as the service information.

In step S202, the antenna system checks service information corresponding to a service to be provided. For example, when it is desired to provide the front vehicle information providing service to a vehicle, the antenna system may check whether there is service information for the front vehicle information providing service among the service information maintained in step S201.

In step S203, the antenna system obtains the road information from an associated navigation system. In general, the navigation system may include information about a driver, an intersection, an access road, a location of a roadside device, and the like, and the antenna system may acquire the information as the road information through an associated navigation system. have. That is, the road information may include the state information of the road based on the current location, the state information of the road, the width of the road, the lane, whether the intersection, whether the access road and the location of the roadside equipment (RSE) And at least one vehicle information on the road.

In this case, the execution order of steps S201 to S203 may be changed. For example, the antenna system may perform step S203 first and then step S201 and step S202, and may be performed in the order of step S201, step S203, and step S202. You may. In addition, when the antenna system includes road information according to a location, step S203 may not be performed.

In step S204, the antenna system determines a direction for transmitting and receiving radio waves based on at least one of the road information and the service information. As described above, the road information may include state information of a road based on a current location. For example, when an access road exists on the left side of the road according to the current location, the antenna system determines a direction for transmitting and receiving the radio wave to the left side of the vehicle for communication with a vehicle entering the current road through the access road. Can be.

In step S205, the antenna system switches the omnidirectional antenna and the directional antenna based on at least one of the road information, the service information, and the determined direction. For example, the antenna system may include both an omnidirectional antenna and a directional antenna, and may select and use a required antenna according to the road information, the service information, or the determined direction. This step (S205) may or may not be selectively performed when the omni-directional antenna is required.

In step S206, the antenna system transmits and receives radio waves in the determined direction. In this case, the antenna system may transmit a radio wave in the determined direction or receive a radio wave through the antenna by adjusting at least one of the direction of the antenna or the phase, angle, intensity, and speed of the radio wave. That is, the antenna system may transmit and receive the radio wave by adjusting the direction of the antenna in the direction determined in step S204, or may communicate with a vehicle or device existing in a desired range by adjusting the phase, intensity, or speed of the radio wave. .

3 is an example of an access road. The vehicle 301 on the road including the access road on the left side may be given priority to communication with the vehicle proceeding through the access road. In this case, for example, the antenna system included in the vehicle 301 may determine that an access road corresponding to the current position exists through the road information, and determine the direction of the antenna in the left direction of the traveling direction and exist in the left direction. Can transmit and receive radio waves with a vehicle. In addition, the vehicle 302 passing the access road may give priority to communication with the vehicle in front of the vehicle proceeding through the access road. In this case, for example, the antenna system included in the vehicle 302 may determine that the vehicle 302 has passed the access road through the road information, and may transmit radio waves with the vehicle or device existing in the traveling direction of the vehicle 302. You can adjust the direction of the antenna to transmit and receive.

4 is an example of a roadside apparatus existing on a road. The roadside device 401 is a device that can be installed on the side of the road to collect or provide information. Here, the antenna system according to an embodiment of the present invention included in a vehicle adjusts the direction of the antenna based on the position of the roadside device 401 or performs beamforming in a direction with respect to the location. 401). For example, in the virtual region that can be determined based on the position of the roadside device 401 and the position of the vehicle, the direction of the antenna is continuously adjusted to transmit and receive radio waves in a direction corresponding to the position of the roadside device 401. I can regulate it.

5 is an example of a direction determination method according to a service. FIG. 5 shows a vehicle 501 in communication with another vehicle ahead on the road, a vehicle 502 in communication with all surrounding vehicles, and a vehicle 503 in communication with a vehicle facing in the opposite direction, respectively. For example, the vehicle 501 may obtain a distance from another vehicle ahead or information about the front of the other vehicle, and the vehicle 502 may obtain information about all surrounding vehicles, and the vehicle 503 may As shown in FIG. 5, the direction of the antenna, the angle of propagation, the phase, the intensity velocity, and the like may be determined to inform the vehicle driving in the opposite direction. That is, the direction for transmitting and receiving radio waves can be determined according to the service.

6 is an example of an intersection. As described above, the antenna system according to an embodiment of the present invention may selectively use an omnidirectional antenna and a directional antenna. That is, the vehicle 601 on the general road can communicate with other vehicles in the traveling direction by setting the direction of the directional antenna as the traveling direction, and the vehicle 602 entering the intersection is all other vehicles around through the omnidirectional antenna. Can communicate with them.

For example, the antenna system may determine the road state of the current location of the vehicle as an intersection based on the road information, and change the configuration of the existing directional antenna to the omni-directional antenna to communicate with all surrounding vehicles. have.

7 is a block diagram illustrating an internal configuration of an antenna system according to an embodiment of the present invention. As shown in FIG. 7, the antenna system 700 according to an embodiment of the present invention includes a service information maintaining unit 701, a service information checking unit 702, a road information obtaining unit 703, and a direction determining unit 704. ), A switching unit 705 and a transceiver unit 706.

The service information maintaining unit 701 maintains service information corresponding to at least one service among all services that can be provided while the vehicle is in operation. In this case, the service information may include information on at least one service among all services that can be provided during the operation of the vehicle, such as an intersection warning service, a forward vehicle information providing service, and an emergency situation backward transmission service. For example, the service information maintenance unit 701 may maintain a service name or service identifier for the intersection warning service as the service information.

The service information checking unit 702 checks service information corresponding to a service to be provided. For example, in the case where it is desired to provide the front vehicle information providing service to a vehicle, the service information checking unit 702 may include service information regarding the front vehicle information providing service among the service information maintained by the service information holding unit 701. You can check if it exists.

The road information acquisition unit 703 obtains the road information from an associated navigation system. In general, the navigation system may include information such as a driver, an intersection, an access road, a location of a roadside device, and the like, and the road information acquisition unit 703 may provide the information through the associated navigation system. Can be obtained as That is, the road information may include the state information of the road based on the current location, the state information of the road, the width of the road, the lane, whether the intersection, whether the access road and the location of the roadside equipment (RSE) And at least one vehicle information on the road.

The direction determiner 704 determines a direction for transmitting and receiving radio waves based on at least one of the road information and the service information. As described above, the road information may include state information of a road based on a current location. For example, when the access road exists on the left side of the road according to the current location, the direction determiner 704 may determine whether the access road exists through the road information, and the vehicle entering the current road through the access road; The direction for transmitting and receiving the radio wave may be determined as the left side of the vehicle for communication of the vehicle.

The switching unit 705 switches the omnidirectional antenna and the directional antenna based on at least one of the road information, the service information, and the determined direction. For example, the antenna system 700 may include both an omnidirectional antenna and a directional antenna, and the switching unit 705 may select a required antenna according to the road information, the service information, or the determined direction.

The transceiver 706 transmits and receives a radio wave in the determined direction. In this case, the transceiver 706 may transmit a radio wave in the determined direction or receive a radio wave through the antenna by adjusting at least one of the direction of the antenna or the phase, angle, intensity, and speed of the radio wave. That is, the transceiver 706 transmits and receives the radio wave by adjusting the direction of the antenna in the direction determined by the direction determiner 704 or adjusts the phase, intensity or speed of the radio wave to exist in a desired range. Communicate with

As described above, when using the antenna system or the transmission / reception method according to an embodiment of the present invention, the service and the road environment to be transmitted when the data to be transmitted by the vehicle is determined based on the position of the vehicle. By setting the direction of the antenna appropriately, the processing process for antenna orientation can be reduced and the effect of channel reuse can be obtained. In addition, the direction of the antenna and the direction of the antenna based on the road information such as the number of lanes, the width of the road, the destination of the data, or the service information about the use of the service to be sent, such as intersection warning service, forward vehicle information service, and accidental backward transmission service You can adjust the strength of the radio wave and the communication speed.

Embodiments according to the present invention can be implemented in the form of program instructions that can be executed by various computer means can be recorded on a computer readable medium. The computer readable medium may include program instructions, file data, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In the present invention as described above has been described by the specific embodiments, such as specific components and limited embodiments and drawings, but this is provided to help a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations are possible from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and all the things that are equivalent to or equivalent to the claims as well as the following claims will belong to the scope of the present invention. .

1 is a view for explaining a general use environment of the antenna system according to an embodiment of the present invention.

2 is a flowchart illustrating a transmission and reception method according to an embodiment of the present invention.

3 is an example of an access road.

4 is an example of a roadside apparatus existing on a road.

5 is an example of a direction determination method according to a service.

6 is an example of an intersection.

7 is a block diagram illustrating an internal configuration of an antenna system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

700: antenna system

701: service information maintenance unit

702: service information checking unit

703: road information acquisition unit

704: direction determination unit

705: switching unit

706: transceiver

Claims (17)

A direction determining unit determining a direction for transmitting and receiving radio waves based on at least one of road information and service information; And Transmitting and receiving unit for transmitting and receiving radio waves in the determined direction Antenna system comprising a. The method of claim 1, The road information includes the state information of the road according to the current location. The method of claim 2, The state information of the road may include at least one of a road width, a vehicle, an intersection, whether an access road, a location of a roadside equipment (RSE), and vehicle information on the road. The method of claim 1, The service information includes information on at least one of all services that can be provided during operation of the vehicle, such as intersection warning service, forward vehicle information providing service, and accidental rearward transmission service. The method of claim 1, A service information maintenance unit for maintaining service information corresponding to at least one service among all services that can be provided while the vehicle is in operation; And Service information confirmation unit to check the service information corresponding to the service to be provided Antenna system further comprising. The method of claim 1, Road information acquisition unit for obtaining the road information from the associated navigation system Antenna system further comprising. The method of claim 1, The transceiver unit, And adjusting the direction of the antenna or the phase, angle, intensity, and speed of the radio wave to transmit radio waves in the determined direction or to receive radio waves through the antenna. The method of claim 1, A switching unit for switching the omni-directional antenna and the directional antenna based on at least one of the road information, the service information and the determined direction. Antenna system further comprising. Determining a direction for transmitting and receiving radio waves based on at least one of road information and service information; And Transmitting and receiving radio waves in the determined direction Transmission method comprising a. The method of claim 9, The road information includes the state information of the road according to the current location, transmission and reception method. The method of claim 10, The state information of the road includes at least one of a road width, a vehicle, an intersection, whether an access road, a location of roadside equipment (RSE), and vehicle information on the road. The method of claim 9, And the service information includes information on at least one of all services that can be provided during operation of the vehicle, such as an intersection warning service, a forward vehicle information providing service, and an accidental rearward transmission service. The method of claim 9, Maintaining service information corresponding to at least one service among all services which can be provided while the vehicle is in operation; And Checking the service information corresponding to the service to be provided Sending and receiving method further comprising. The method of claim 9, Obtaining the road information from an associated navigation system Sending and receiving method further comprising. The method of claim 9, Transmitting and receiving the radio wave, Adjusting at least one of the direction of the antenna or the phase, angle, intensity, and speed of the radio wave to transmit radio waves in the determined direction or to receive radio waves through the antenna It includes, the transmission and reception method. The method of claim 9, Switching an omni-directional antenna and a directional antenna based on at least one of the road information, the service information and the determined direction. Sending and receiving method further comprising. A computer-readable recording medium in which a program for executing the method of any one of claims 9 to 16 is recorded.

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