JP2011129090A - Method and device for providing traffic signal information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traffic signal information providing method and device adapted to allow a radio receiver in a vehicle to receive traffic signal information at an intersection transmitted to the radio receiver in real time by a radio transmitter interlocked with a traffic signal controller, and to interpret the received traffic signal information based on a road index technology to utilize it for an idle stop, economical driving, traffic safety service, or the like. <P>SOLUTION: The traffic signal information providing method includes steps for extracting traffic signal information from the traffic signal controller by the radio transmitter, combining the position information of a signal at the intersection at which the traffic signal controller is located, with the traffic signal information to form a data packet, and transmitting the data packet to the radio receiver. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a traffic signal information providing method and apparatus, and more specifically, by encoding various traffic signal information for each intersection so as to correspond to road information, the encoded traffic signal information is stored in a vehicle. The present invention relates to a method and apparatus for extracting only traffic signal information corresponding to a traveling direction of a vehicle and using it for vehicle control when transmitted wirelessly.

  Recently, pollution problems have become more serious due to an increase in exhaust gas due to the rapid increase in automobiles, which has become a serious social problem.

  In this way, in order to reduce the exhaust gas of the car, if the car stops due to a signal, etc. while driving in an urban area, the idling engine is automatically stopped, and if the car starts to start after a predetermined time, the engine is restarted. An idle stop control device (also called an engine automatic stop / restart device, engine idle stop & go device in other terms) that is started is mounted on the vehicle. Yes.

  However, in order to perform the idle stop control while the vehicle is stopped by waiting for a signal or the like, it is necessary to know exactly how long the current vehicle must wait for a red signal.

  In a state where the red light waiting time is unknown, a driving beginner who is not used to driving or an impatient driver suddenly and strongly presses the accelerator pedal when the traffic light signal turns blue. If this happens, there is a problem that the amount of exhaust gas increases.

  Therefore, the vehicle can accurately grasp the traffic signal information at the intersection, and the vehicle can be automatically started and turned off for idle stop via a predictable computer without driver intervention, which saves energy. Therefore, there is a need for a method that can express economic speed and optimal route.

  The present invention has been proposed in order to solve the above-described problems. The present invention is based on the fact that a wireless transmitter linked to a traffic signal controller receives traffic signal information at an intersection in real time in a vehicle. To provide a method for receiving the signal with a wireless receiver and interpreting the received traffic signal information based on road index technology so that it can be used for idle stop, eco-driving, traffic safety service, etc. With the goal.

  In the traffic signal information providing method according to the present invention, the wireless transmitter extracts the traffic signal information from the traffic signal controller, and combines the traffic signal position information with the traffic signal information at the intersection where the traffic signal controller is located. Generating a data packet and transmitting the data packet to a wireless receiver.

  In particular, the traffic signal information includes traffic signal current (Phase) information and current information upload information, and is combined with the traffic signal information obtained by extracting the traffic signal position information of the corresponding intersection of the wireless transmitter. The position of the traffic light and the ring number included in the traffic signal display information are mapped clockwise with reference to the north.

  The wireless transmitter is mounted on a traffic signal controller, and power is supplied from the traffic signal controller.

  The data packet includes a data header including a traffic signal controller identifier, a packet type, a sequence, a ring type, and the number of indications.

  The packet type indicates whether or not the wireless transmitter operates normally.

  The sequence means a data packet generation number, which is incremented by 1 and is initialized to 0 when a certain bit is exceeded.

  The data packet further includes traffic signal direction information and red signal remaining time information.

  In addition, the data packet includes a data header including a traffic signal controller identifier, a packet type, a partition pattern, a ring type, and a number of indications.

  The data packet further includes traffic signal direction information and green signal time information.

  Further, the direction information of the traffic signal is input according to the traffic signal index, and the traffic signal index is assigned a number in the order of traffic signals that are close to each other in the clockwise direction with reference to north.

  On the other hand, in another traffic signal information providing method of the present invention, a radio receiver externally transmits a data packet generated by combining traffic signal position information at an intersection corresponding to traffic signal information extracted from a traffic signal controller. Receiving the vehicle current position information, and using the acquired position information to extract traffic signal information corresponding to the traveling direction of the vehicle from the data packet.

  In particular, the step of acquiring the current position information of the vehicle is characterized in that the current position information of the vehicle is acquired from a satellite navigation device (GPS) provided in the vehicle.

  On the other hand, the traffic signal information providing apparatus according to the present invention includes a current information extraction unit that extracts traffic signal information from a traffic signal controller, and traffic signal information that is extracted position information of a traffic signal at an intersection where the traffic signal controller is located. And a data generation unit that generates a data packet and a transmission unit that transmits the data packet to the outside.

  In particular, the traffic signal information providing apparatus is mounted on a traffic signal controller, and is provided with a power supply unit that is supplied with power from the traffic signal controller and supplies necessary power to each unit.

  The traffic signal information includes traffic signal display information and display information upload information, and the data generation unit is included in the traffic signal position and traffic signal display information in a clockwise direction with reference to the north at the intersection. A data packet is generated by mapping a ring number.

  The data packet includes a data header including a traffic signal controller identifier, a packet type, a sequence, a ring type, and the number of indications.

  Further, the data packet is characterized by including traffic signal direction information and red signal remaining time information.

  The data packet includes a data header including a traffic signal controller identifier, a packet type, a partition pattern, a ring type, and the number of indications.

  In addition, the length of the division pattern varies depending on the number of display, and the length of the division pattern increases as the number of display increases.

  On the other hand, another traffic signal information providing apparatus of the present invention combines a position information collecting unit for acquiring current position information of a vehicle and a position information of a traffic signal at an intersection corresponding to the traffic signal information extracted from the traffic signal controller. A receiving unit that receives the generated data packet from the outside, and a data processing unit that extracts traffic signal information corresponding to the traveling direction of the vehicle from the data packet using the acquired position information.

  As described above, according to the present invention, the following effects can be expected.

  Without the hardware and software changes of the traffic signal controller already installed and operating on the road, the wireless transmitter obtains only the current information from the traffic signal controller and combines it with the location information for the intersection. A computer that can be predicted without the driver's intervention by enabling the wireless receiver to transmit and receive only the traffic signal information corresponding to the traveling direction of each car using a specific route and GPS information Through which the car can automatically start and stop for idle stop, express the economic speed and optimal route to save energy and drive the service to avoid the collision in the section where the signal changes It can be provided to the hand.

  In addition, according to the present invention, since it is sufficient to install only one radio transmitter at the intersection without installing a radio transmitter for each traffic signal at the intersection, it is possible to reduce installation and operation costs in the service implementation indication. is there.

  Furthermore, in consideration of the fact that the wireless communication system using a specific frequency (for example, 447 MHz) in the present invention has a relatively low data transmission rate (1200-2400 bps), traffic signal information to be transmitted is included. By minimizing the length of the data packet, not only can the broadcast interval be periodically transmitted to the car, but also the processing (encoding / decoding) time can be greatly reduced and the service response time can be further shortened. It becomes like this.

1 is a conceptual diagram for helping understanding of the present invention. FIG. It is a figure which shows the use frequency of the specific small output radio | wireless apparatus for radio | wireless adjustments and safety systems. It is a block diagram for demonstrating in detail the structure of the wireless transmitter of the traffic information signal provision apparatus which concerns on this invention. It is a figure which shows an example which maps a traffic signal and a ring number, when it is 4 display double rings (A ring / B ring). It is a figure for demonstrating the structure of the produced | generated data packet based on one Embodiment of this invention. It is a figure which shows an example of the method of expressing traffic signal direction information and the remaining time of a red signal with 4 display double rings. It is a figure which shows an example of the method of expressing traffic signal direction information and the remaining time of a red signal with 4 display double rings. It is a figure for demonstrating the structure of the data packet produced | generated by other embodiment of this invention. It is the example which divided and expressed each length of the 4 display information contained in one barrier with 4 display double rings by the 2-bit division | segmentation pattern. It is a figure for showing the change of the variable account by the number of displays. It is a figure for showing the change of the variable account by the number of displays. It is a figure for showing the change of the variable account by the number of displays. It is a figure which shows the example of expression of the display direction by the number of display. It is a figure which shows the example of expression of the display direction by the number of display. It is a figure which shows a ring pattern in the case of 4 displays. It is a figure which shows a ring pattern in the case of 3 present displays. It is a figure which shows a ring pattern in the case of 5 displays. It is a figure which shows the method of expressing eight presenting periods. In the case of a single ring, it is a figure which shows the length of the data payload except the length of the header. In the case of a double ring, it is a figure which shows the length of the data payload except the length of the header. It is a block diagram for demonstrating in detail the structure of the radio | wireless receiver of the traffic information signal provision apparatus which concerns on one Embodiment of this invention.

  The present invention will now be described in detail with reference to the accompanying drawings. Here, repeated descriptions, detailed descriptions of known functions and configurations that unnecessarily obscure the subject matter of the present invention are omitted. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings can be exaggerated for a clearer description.

  The present invention specifies a communication protocol for a wireless transmitter that transmits traffic signal information and a wireless receiver that receives the traffic signal information. The present invention can be broadly divided into three types, a method in which a wireless transmitter extracts an adaptive indication in conjunction with a traffic signal controller, and a red signal residual time information is encoded with the extracted indication information. Including a method for encoding and decoding, a method for encoding and decoding signal time information of a green signal with the extracted display information, and the like.

  Hereinafter, a traffic signal information providing method and apparatus according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a conceptual diagram for helping understanding of the present invention.

  Referring to FIG. 1, there are intersections as shown in FIG. 1 in the city center, and traffic lights (not shown) for smoothly controlling the flow of signals are installed at such intersections. In the present invention, an intersection refers to a road on which a traffic signal for controlling the flow of a traveling vehicle exists. At such an intersection, the above-described traffic signal (traffic signal lamp) is installed, and there is a traffic signal controller 10 that controls the traffic signal.

  Here, the traffic signal controller transmits / receives traffic signal information using a remote traffic information management server (not shown) and a wired / wireless communication system, and traffic signals with other adjacent traffic signal control devices. Information can be exchanged. In general, the traffic signal controller is referred to as LC (Local Controller), and the traffic information management server is referred to as RC (Remote Controller).

  The traffic signal information providing apparatus of the present invention includes a wireless transmitter that wirelessly transmits traffic signal information and a wireless receiver that receives traffic signal information transmitted from the wireless transmitter.

  The wireless transmitter is mounted on the traffic signal controller 10, and power can be supplied from the traffic signal controller 10. In such a case, it is mounted on the traffic signal controller 10 in the form of an RF module, and only the antenna is exposed to the outside as compared with the existing traffic signal controller. The wireless transmitter encodes various traffic signal information for each intersection so as to correspond to the road information, generates a data packet, and transmits the data packet to the wireless receiver.

  The wireless receiver can be mounted on or attached to the vehicle, receives the data packet transmitted from the wireless transmitter, extracts only the traffic signal information corresponding to the traveling direction of the vehicle from the received data packet, and controls the vehicle To be used. For example, the extracted traffic signal information can be used for idle stop, eco-driving, traffic safety service, and the like.

  In the present invention, the frequency band used for transmitting data packets is 447.5812 MHz and 447.5935 HMz, and there is no application service in use up to now (see FIG. 2). FIG. 2 shows the frequency of use of a specific low-power wireless device for radio adjustment and safety system (Information Communication Department No. 2000-45). The 447 MHz frequency belongs to specific low-power wireless devices for wireless adjustment and safety systems.

  FIG. 3 is a diagram for explaining in detail the configuration of the wireless transmitter 100 of the traffic information providing apparatus according to the present invention.

  Referring to FIG. 3, the wireless transmitter 100 according to the present invention includes a current information extraction unit 110, a data generation unit 120, a transmission unit 130, and a power supply unit 140.

  The present information extraction unit 110 extracts traffic signal information from the traffic signal controller 10 via the RS232C communication method. At this time, the traffic signal controller standard specification is referred to for the detailed contents of the interlock protocol message with the traffic signal controller 10.

  The traffic signal information extracted from the traffic signal controller by the current information extraction unit 110 includes traffic signal current information and current information upload information.

  The traffic signal display information includes the entire cycle of the traffic signal, current cycle count, ring information, and signal cycle counter information of each display. The effective data in the traffic signal display information is the ring operation. The system, cycle counter, and current cycle. Also, the current information upload information includes the operating time of ring A current 1 (RING A PHASE 1) to the current time of current 8 (PHASE 8), or the operating time of ring B current 1 (RING B PHASE 1). To operating time information of present indication 8 (PHASE 8).

  Here, the present indication means an indication of a current signal to the vehicle or an indication of a signal. The ring means the order in which the traffic lights turn on in each direction. A single ring indicates one order system, and a double ring indicates two order systems.

  The current information extraction unit 110 uses RS232C communication to acquire traffic signal information from the traffic signal controller 10. At this time, the identifier (LC_ID) of the traffic signal controller 10 is stored in the EEPROM of the traffic signal controller 10. A certain value is used and is based on a communication protocol between the traffic signal controller (LC) 10 and the traffic information management server (RC). This means that traffic signal display information composed of a request of OPCODE 0x12 and a response of 0x13, and display information upload information composed of a request of 0x32 and a response of 0x33 are received. .

  The data generation unit 120 combines the traffic signal information at the intersection where the traffic signal controller 10 is located with the traffic signal information extracted by the current information extraction unit 100 to generate a data packet. That is, the data generation unit 120 processes the traffic signal position information at the intersection into traffic signal information extracted from the traffic signal controller 10 and converts the traffic signal information into a format that can be interpreted by a radio receiver mounted on or attached to a car in the intersection. And transmit to the wireless receiver.

  At this time, the data generation unit 120 generates a data packet to be transmitted to the wireless receiver by mapping the position of the traffic light and the ring number included in the above-described traffic signal information in a clockwise direction with reference to the north at the intersection. FIG. 4 is a diagram illustrating an example in which a traffic signal and a ring number are mapped in the case of a 4-display double ring (A ring / B ring).

  According to the present invention, there is no need for a radio transmitter for transmitting traffic signal information for each traffic signal at an intersection, and the traffic signal information of all traffic signals can be transmitted by only one radio transmitter at one intersection. is there.

On the other hand, a method of generating a data packet in the data generation unit 120 is
A. A method for encoding the remaining time information of the red traffic light into the extracted traffic signal information;
B. A method for encoding the green signal time in the extracted traffic signal information
Can be divided into

  First, the structure of the data packet generated by the data generation unit 120 by the A method is as shown in FIG.

  Referring to FIG. 5, the header portion of the data packet includes a packet type, a sequence (Sequence), a traffic signal controller identifier (LC_ID), a ring type (Ring type), and a current number.

  The packet type can be Broadcast and Error. Broadcast indicates a message for transmitting RF data from a wireless transmitter to a wireless receiver in cooperation with traffic signal information when the system operates normally. Error broadcasts error data when an abnormality occurs in the system. The message type is specified as follows.

  The Length part is composed of 4 bits, LSB (least significant bit) 3 bits indicate a current indication (Phase), and MSB (most significant bit) 1 bit separates a single ring and a double ring. Therefore, the length of the entire data packet can be estimated based on the present information and the ring information.

  For example, in the case of a 4-display double ring, the header of the data packet is 16 bits, the traffic signal direction information is 16 bits (A ring-8 bits, B ring-8 bits), and the remaining time of the red signal is 64 bits (A ring-32 bits, B ring) -32 bits), CRC is 8 bits, for a total of 98 bits.

  The traffic signal controller identifier (LC_ID) has a unique identification number of 4 bits that does not overlap with neighboring intersections. Furthermore, the sequence means the generation number of the data packet transmitted to the wireless receiver, and is incremented by 1. When 4 bits are exceeded, the sequence is initialized to 0 and incremented again.

  The body part of the data can be roughly divided into two parts (the traffic signal direction information and the remaining time of the red time), and the data generation unit 120 maps each traffic signal according to the result of mapping the traffic signal and the ring number in the above description. Put direction information. At this time, the direction information of the traffic light is expressed by 2 bits, 00 can indicate a signal for a pedestrian, 01 can indicate a straight traveling signal, 10 can indicate a left turn signal, and 11 can indicate a special signal. Similar to the traffic signal direction information, the remaining time information of the red signal is mapped in the order of the ring number and expressed by a 1-byte hex value. Finally, 1 byte is used in the CRC field for message integrity. 6 and 7 are diagrams showing an example of a method for expressing the traffic signal direction information and the remaining time of the red signal by using the four-display double ring.

  The transmission unit 130 plays a role of transmitting the data packet generated via the data generation unit 120 to the outside. That is, the transmission unit 130 transmits the data packet generated via the data generation unit 120 to the wireless receiver mounted on or attached to the vehicle.

  As described above, the wireless transmitter 100 according to the present invention is mounted on the traffic signal controller 10, and at this time, the power supply unit 140 supplies power necessary for the operation of the wireless transmitter 100 from the traffic signal controller 10. In response, the data are supplied to the above-described units (presentation information extraction unit, data generation unit, transmission unit).

  Next, the structure of the data packet generated by the data generation unit 120 by the B method is as shown in FIG.

  The data packet generated by the B method can reduce the packet length by about 19% compared to the data packet generated by the A method.

  That is, when considering that the frequency used in the present invention is a 447 MHz band and the wireless communication system using this frequency has a relatively low data transmission rate (1200-2400 bps), the transmitted data By minimizing the packet length, the interval at which the wireless transmitter periodically broadcasts to the car can be shortened.

  In addition to this, the time for processing the data packet received from the wireless transmitter by the wireless receiver can be greatly reduced, so that the service response time can be further shortened.

  Referring to FIG. 8, the header part of the data packet includes a packet type, a ring type, a sequence, a current number, a traffic signal controller identifier (LC_ID), and a division pattern (Partition Pattern). Including a length of 2 bytes.

  The packet type indicates a message type for communication between a wireless transmitter and a wireless receiver such as HELLO, BEACON, BEACON_REQUEST, and UPDATE_HELLO, and data is transmitted from the wireless transmitter such as TVC10_BROADCAST and TVC10_ERROR to the wireless receiver. Indicates the message type for sending a packet.

  TVC10_BROADCAST defines a message type to broadcast data linked with traffic signal information when the traffic information signal providing apparatus of the present invention operates normally, and TVC10_BROADCAST has an abnormality in the traffic information signal providing apparatus of the present invention. The message type is specified so that error data is broadcast when the error occurs.

  In the header portion of the data packet, the 1-bit ring type distinguishes between single ring 0 and double ring 1, and the 3-bit display number indicates the current display, 000 (2) -111 (2) (1 current display). -8 present indication).

  Referring to FIG. 9, in the case of double ring 4 display, if the length of the quadrangle is assumed to be the display period, the four display information included in one barrier is divided into a long part and a short part. It can be divided and expressed by a 2-bit division pattern.

  For example, 00 (2) is irregular when the B ring has the same period as the A ring, 01 (2) and 10 (2) are irregular when the B ring has a period opposite to the A ring, and 11 (2) is irregular. Each case having a period is expressed. Here, the length of the division pattern differs depending on the information of the number of indications, and occupies 2 bits in the case of 2 indication-3 indication, 4 bits in the case of 4 indication-5 indication, and 6 bits in the case of 6 indication. .

  The body part of the data packet is roughly divided into two parts (signal direction information and display information). The traffic signal direction information is input according to the traffic signal index.

  The traffic light indexes are numbered in order from the clockwise direction with reference to the north, and the direction information of the traffic lights is input in the order of the traffic light index.

  At this time, in the case of less than 5 presents (that is, in the case of 2 presents-4 presents), the traffic signal direction information is expressed by 2 bits, 00 (2) is a pedestrian signal for pedestrians, 01 (2 ) Is a straight signal, 10 (2) is a left turn signal, and 11 (2) is a special signal (left side of FIG. 13).

  In the above case of 5 indications, it can be expressed in 3 bits as shown in the right side of FIG. 13 and FIG.

  The current cycle (Current Count) is a current cycle count transmitted from the traffic signal controller and is expressed in 8 bits, and the Barrier Count is a barrier cycle and is expressed in 8 bits, and the number of barriers is sequentially input. The In the case of 4 displays, there are 2 valid accounts (see FIG. 10), 2 in the case of 3 displays (see FIG. 11), and 3 in the case of 5 displays (FIG. 12).

  The ring pattern (Ring Pattern) and the ring start index (Ring Start Index) indicate the order in which the signals flash between the traffic lights. The ring start index is the number of the traffic light that the signal first lights up in the clockwise direction with respect to the north. In the case of a double ring, there are two types of A ring and B ring, respectively.

  The ring pattern indicates the order of flashing traffic lights. FIG. 15, FIG. 16, and FIG. 17 show ring patterns in the case of 4 displays, 3 displays, and 5 displays, respectively.

  The current green time of phase represents the current period.

  For example, in the case of double ring 4 indications, there are a total of 4 indications in one barrier and 8 indications in 2 barriers. At this time, the relationship between each display position and the longer side and the shorter side can be grasped via the division pattern.

  For example, in FIG. 18, 01 + 02 (or 05 + 06) is the barrier 1 period, and 03 + 04 (or 07 + 08) is the barrier 2 period. In the division pattern, barrier 1 is 01 (2) and barrier 2 is 00 (2). FIG. 18 shows a method for expressing a total of eight present (01, 02, 03, 04, 05, 06, 07, 08) periods.

  In the current green time of phase consisting of 7 bits in total, the 0th bit represents the longer and shorter (0/1) of the partition, and the 1st bit is the sign of the offset (Offset) + / − (0/1), and the second and third bits indicate the number of times the corresponding barrier period is divided into two. Finally, in the offset field that is the fourth to seventh bits, the barrier period is 2, and the difference value between the corresponding display period and the corresponding value in the number of divisions (The # of division by 2) field is expressed in 3 bits.

  For example, each indication 01 (40 s), 02 (48 s), 03 (29 s), 04 (29 s), 05 (72 s), 06 (16 s), 07 (29 s), and 08 (29 s) is indicated as a blue light. If expressed in time (The green time of phase), it can be expressed as 01 (0001100 (2)), 04 (00000111 (2)), 06 (0011101 (2)) as follows.

  At this time, the 02 period can be obtained by subtracting the 01 period from the barrier 1 period, so that the 02 period is not shown. Similarly, since the 05 period can be calculated based on the 06 period, the expression of the 05 period is also omitted. Furthermore, since the remaining 03, 07, and 08 can be inferred in 04 cycles, all these expressions are omitted.

  Finally, the CRC field is used in 8 bits for message integrity.

  Therefore, the length of the entire data packet can be determined based on the ring type, the number of indications, and the division pattern. In each case of the single ring and the double ring, the data payload excluding the header length ( The length of (payload) is shown in FIG. 19 and FIG. In the case of a double ring, the length of the green signal time of the current display may vary depending on the division pattern value when the number of display is four or more.

  FIG. 21 is a diagram for explaining in detail the configuration of the wireless receiver of the traffic information signal providing apparatus according to the present invention.

  Referring to FIG. 21, a wireless receiver 200 that receives traffic signal information from a wireless transmitter that operates in conjunction with a traffic signal controller includes a location information acquisition unit 210, a reception unit 220, a data generation unit 230, and a service provision unit 240. It can be installed and attached to a car.

  The position information acquisition unit 210 acquires the current position information of the car. At this time, the position information acquisition unit 210 can acquire GPS information in conjunction with an IT apparatus or satellite navigation apparatus (GPS) that uses GPS information.

  The receiving unit 220 receives a data packet transmitted from the wireless transmitter. Here, the data packet received by the wireless receiver is a data packet generated by combining the traffic signal position information at the intersection corresponding to the traffic signal information extracted from the traffic signal controller.

  If the data packet is received through the receiving unit 200, the data processing unit 230 uses the current position information of the vehicle acquired through the position information acquiring unit 210 to generate traffic signal information corresponding to the traveling direction of the corresponding vehicle. Is extracted from the received data packet. The received data packets are numbered while increasing the road direction at the intersection in a clockwise direction with reference to north, and the remaining time of the red signal for each road (or the interval of the green signal for each road) And are included.

  Therefore, the data processing unit 230 can map the direction information of the approaching and advancing roads based on the road index information included in the data packet and the position information acquired via the position information acquiring unit 210. The remaining time of the red and blue lights when the car is waiting can be extracted.

  On the other hand, when there is route information such as a city bus, the position information promised to be a wireless transmitter can be used without using GPS information, and this position information is based on a specific direction (for example, north). Can be used by determining the traveling direction at 360 degrees clockwise or counterclockwise.

  The service providing unit 240 receives the traffic signal information extracted by the data processing unit 230, converts the data to conform to the communication protocols, functions, and performances of various external devices and transmits the data to the external devices. I do.

  For example, the service providing unit 240 may transmit traffic signal information extracted by an external device such as an idle stop control device, an eco driving device, a traffic safety service device, and the like.

  According to the present invention, the radio transmitter acquires only the present information from the traffic signal controller without using hardware and software changes of the traffic signal controller that is already installed and operated on the road, and this is used for the intersection. By interfacing with the location information, the wireless receiver that receives this information can extract only the traffic signal information corresponding to the traveling direction of each car using the specific route and GPS information, so that the driver's intervention The vehicle can automatically start and disappear for idle stop via a predictable computer without any problems, express economic speed and optimal route to save energy and avoid collisions in the section where the signal changes Will be provided to the driver.

  In addition, according to the present invention, since it is sufficient to install only one radio transmitter at the intersection without installing a radio transmitter for each traffic signal at the intersection, it is possible to reduce installation and operation costs in the service implementation indication. is there.

  Furthermore, in consideration of the fact that the wireless communication system using a specific frequency (for example, 447 MHz) in the present invention has a relatively low data transmission rate (1200-2400 bps), traffic signal information to be transmitted is included. By minimizing the length of the data packet, not only can the broadcast interval be periodically transmitted to the car, but also the processing time can be greatly reduced by significantly reducing the processing (encoding / decoding) time. It becomes like this.

  As described above, the optimum embodiment has been disclosed in the drawings and specification. Although specific terminology has been used herein, it is merely used for the purpose of describing the present invention and is intended to limit the scope of the invention as defined in the meaning and claims. It was not used for For this reason, those skilled in the art will understand that various modifications and other equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention must be determined by the technical idea of the appended claims.

10 ... Traffic signal controller 20 ... GPS
DESCRIPTION OF SYMBOLS 100 ... Wireless transmitter 110 ... Present information extraction part 120 ... Data generation part 130 ... Transmission part 140 ... Power supply part 200 ... Wireless reception part 210 ... Position information acquisition part 220 ・ ・ ・ Receiving unit 230 ・ ・ ・ Data generating unit 240 ・ ・ ・ Service providing unit

Claims (20)

The wireless transmitter
Extracting traffic signal information from the traffic signal controller;
Combining the traffic signal position information at the intersection where the traffic signal controller is located with the traffic signal information to generate a data packet;
A traffic signal information providing method comprising: transmitting the data packet to a radio receiver.   The traffic signal information includes traffic signal display information and display information upload information, and the wireless transmitter combines the traffic signal position information of the corresponding intersection with the extracted traffic signal information, so The traffic signal information providing method according to claim 1, wherein the traffic signal position and the ring number included in the traffic signal display information are mapped clockwise as a reference.   The traffic signal information providing method according to claim 1, wherein the wireless transmitter is mounted on the traffic signal controller, and power is supplied from the traffic signal controller.   2. The traffic signal information providing method according to claim 1, wherein the data packet includes a data header including an identifier, a packet type, a sequence, a ring type, and a current number of the traffic signal controller.   5. The traffic signal information providing method according to claim 4, wherein the packet type indicates whether or not the wireless transmitter operates normally.   5. The traffic signal information providing method according to claim 4, wherein the sequence means a generation number of the data packet, is incremented by 1 and is initialized to 0 when a certain bit is exceeded.   5. The traffic signal information providing method according to claim 4, wherein the data packet further includes direction information of the traffic light and remaining time information of a red signal.   The traffic signal according to claim 1, wherein the data packet includes a data header including an identifier of the traffic signal controller, a packet type, a partition pattern, a ring type, and a number of indications. Information provision method.   The method of claim 8, wherein the data packet further includes direction information of the traffic light and signal time information of a green signal.   10. The traffic signal information providing method according to claim 9, wherein the traffic signal direction information is input according to a traffic light index, and the traffic light index is assigned a number in the order of traffic lights that are close to each other in the clockwise direction with reference to north. . Wireless receiver
Receiving from outside the data packet generated by combining the traffic signal information extracted from the traffic signal controller with the traffic signal position information at the corresponding intersection;
Obtaining the current position information of the car;
Extracting traffic signal information corresponding to the traveling direction of the vehicle from the data packet using the acquired position information.   12. The traffic signal information providing method according to claim 11, wherein the step of acquiring the current position information of the vehicle acquires the current position information of the vehicle from a satellite navigation device (GPS) provided in the vehicle. . A current information extraction unit that extracts traffic signal information from the traffic signal controller;
A data generation unit for generating a data packet by combining position information of a traffic signal at an intersection where the traffic signal controller is located with the extracted traffic signal information;
A traffic signal information providing apparatus comprising: a transmission unit that transmits the data packet to the outside.   The traffic signal information provision according to claim 13, further comprising a power supply unit that receives power from the traffic signal controller and supplies necessary power to each unit, and is mounted on the traffic signal controller. apparatus.   The traffic signal information includes traffic signal display information and display information upload information, and the data generator is included in the traffic signal position and the traffic signal display information in a clockwise direction with reference to the north at the intersection. 14. The traffic signal information providing apparatus according to claim 13, wherein the data packet is generated by mapping a ring number.   The traffic signal information providing apparatus according to claim 13, wherein the data packet includes a data header including an identifier, a packet type, a sequence, a ring type, and a current number of the traffic signal controller.   The traffic signal information providing apparatus according to claim 16, wherein the data packet includes direction information of the traffic light and remaining time information of a red signal.   The traffic signal according to claim 13, wherein the data packet includes a data header including an identifier of the traffic signal controller, a packet type, a partition pattern, a ring type, and a number of indications. Information providing device.   19. The traffic signal information providing apparatus according to claim 18, wherein the length of the division pattern varies depending on the number of indications, and the length of the division pattern increases as the number of indications increases. A location information collection unit that acquires current location information of the car;
A receiving unit for receiving a data packet generated by combining the traffic signal information extracted from the traffic signal controller with the traffic signal position information at the corresponding intersection; and
A traffic signal information providing apparatus comprising: a data processing unit that extracts traffic signal information corresponding to a traveling direction of the vehicle from the data packet using the acquired position information.

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