KR20090022923A - Traffic emergency information transmitting and receiving device using location recording information of vehicle and its method - Google Patents

Abstract

The present invention relates to an apparatus for transmitting and receiving traffic emergency information using location recording information of a vehicle and a method thereof, comprising: a location recording information generation unit for receiving location information of a vehicle from a positioning system and generating and storing vehicle location recording information based on the location information; A TE message generator configured to generate a TE message including a DP value of a next relay node generated based on a current speed of the vehicle; A message transmitter for transmitting a TE message of an emergency vehicle generated by the TE message generator to a transceiver of another vehicle within a message transmission range; A message receiver configured to receive a TE message transmitted from the TE message transmitter of another vehicle existing within the message transmission range; And determining the location information between the transmitting and receiving devices existing within a predetermined distance, and when receiving the first TE message from the emergency vehicle, determines whether the vehicle is at the closest distance from the initial TE message, and determines that the vehicle is at the closest distance. If there is, the TE message generating unit generates a second TE message for the next relay node based on the current speed of the vehicle, and transmits the generated second TE message to the transceiver of another vehicle through the message transmitting unit. A determination controller; It includes.

Description

Apparatus for transmitting and receiving traffic emergency information using location information of vehicle and method thereof

The present invention relates to an apparatus for transmitting and receiving traffic emergency information, and more particularly, to a traffic emergency (TE) including a DP (designated point) value, which is a next relay node position value using a vehicle location record, a current moving speed, and the like. Traffic emergency information transmission and reception device using the location record information of the vehicle that can continuously set the rear relay node and can effectively transmit the traffic emergency information to the rear vehicle by continuously generating and transmitting the message to the rear vehicle And to a method thereof.

In general, traffic emergency information refers to information related to vehicle safety that may occur in vehicles in operation. That is, it refers to all information including various hazards that may occur in the driving situation of the vehicle such as sudden stop warning, crash warning, vehicle failure warning, tire danger warning, road construction area warning, and vehicle accident warning.

In emergency situations, a few seconds can greatly reduce the risk or incidence of an accident. The OFfice of COMmunication in UK survey reports that providing the driver with information about one second ahead of the time when the driver directly detects the accident can prevent about 90% of crashes. In other words, if information is provided to the vehicles in the rear after the first vehicle accident, additional chain collision accidents can be greatly reduced.

On the other hand, the recent development of wireless network technology has appeared DSRC (Dedicated Short Range Communication) technology of 5GHz and 5.9GHz radio band that can exchange information even between vehicles moving at high speed. It is divided into V2R (Vehicle to Roadside) technology centered on providing information using base stations installed on the side of the road and V2V (Vehicle to Vehicle) technology for the purpose of exchanging information between vehicles. Because V2V technology is vehicle-to-vehicle communication, it does not leverage network infrastructure. Therefore, the V2V technology is called Inter-Vehicle Communication (IVC). Since IVC technology for the advancement of vehicle safety mostly assumes an emergency situation, it presents strict requirements over other services. Inter-vehicle communication is communication between vehicles running on the same road, and the vehicles participating in the communication use a broadcasting-type delivery method for information transmission because they transmit and receive messages without a preset interconnection.

Broadcasting is a simple and fast way to propagate information.However, if multiple network nodes are used in a wireless network that shares a limited frequency, information may be lost or frequently retransmitted due to collisions between radio transmission messages. The transmission time becomes long. In addition, multi-hop transmission is necessary to secure an effective safety distance in a situation where a general radio signal propagation radius is limited. In this case, the damage caused by wireless broadcasting becomes more significant.

The present invention was devised in view of the above-described problems, and continuously generates a TE message including a DP (designated point) value, which is the next relay node position value, using the position recording of the vehicle, the current moving speed, and the like, and continuously transmits the TE message to the rear vehicle. Accordingly, it is a characteristic object of the present invention to provide an apparatus and method for transmitting and receiving traffic emergency information using location recording information of a vehicle capable of continuously setting a rear relay node and effectively transmitting traffic emergency information to rear vehicles.

The present invention for achieving the above object, the location record information generation unit for receiving the location information of the vehicle from a separate positioning system such as a satellite navigation system and an inertial navigation system and generates and stores the vehicle location record information based on this; A TE message generator configured to generate a TE message including a DP value of a next relay node generated based on a current speed of the vehicle; A message transmitter for transmitting a TE message of an emergency vehicle generated by the TE message generator to a transceiver of another vehicle within a message transmission range; A message receiver configured to receive a TE message transmitted from the TE message transmitter of another vehicle existing within the message transmission range; And determining the location information between the transmitting and receiving devices existing within a predetermined distance, and when receiving the first TE message from the emergency vehicle, determines whether the vehicle is the closest distance from the first TE message, and the distance of the nearest vehicle. In case of, to generate a second TE message for the next relay node based on the current speed of the vehicle through the TE message generator, and transmits the generated second TE message to the transceiver of another vehicle through the message transmitter. A position determination controller; It includes.

According to the present invention as described above, a TE message including a DP (Designated Point) value, which is the next relay node position value, is generated using the vehicle's position recording, the current moving speed, and the like, and continuously transmitted to the rear vehicle, thereby repeatedly transmitting to a sufficient distance. The relay is made to increase the traffic safety of the rear vehicle.

In addition, according to the present invention, by transmitting a priority in one section in the transmission of traffic emergency information so that only a small number of nodes participate in the information propagation, it is also possible to secure the retransmission reliability of the relay nodes.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It should be interpreted to mean meanings and concepts. In addition, when it is determined that the detailed description of the known function and its configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, it should be noted that the detailed description is omitted.

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

1 is a block diagram of a traffic emergency information transmission and reception device (hereinafter, referred to as a "transmission and reception device") 100 using location recording information of a vehicle according to the present invention, and as shown, the location recording information generation unit 110. , The TE message generator 120, the message transmitter 130, the message receiver 140, and the location determination controller 150 are included.

The location recording information generation unit 110 receives the location information of the vehicle from a separate positioning system such as a satellite navigation system and an inertial navigation system, and generates and stores vehicle location recording information for 60 seconds at a 1 second interval based on the location information. At this time, the positional recording information of the vehicle by time may be configured in the form of a circular queue, as shown in FIG.

That is, all vehicles equipped with the transmission / reception apparatus 100 according to the present invention continuously record their current driving position in a circular queue every 1 second. When the queue is full, the new location information is added to the oldest recording location information. Is updated. As shown in FIG. 2, when the position of the cue 10 is the current position, the cue value 1 is 9 seconds ago, the cue value 9 is 1 second ago, and the cue number 11 is 59 seconds ago.

The location recording information generation using the circular queue as described above may reflect the position and shape of the road on which the vehicle moves, thereby generating DP values of an ideal relay node on a curved road as well as a straight road.

At this time, the DP (Designated Point) value refers to the position value of the next relay node, and as described above, the rear specific position value designated based on the previous path of the vehicle, that is, the vehicle position record information generated for 60 seconds at one second interval. it means.

In addition, the TE message generating unit 120 performs a function of generating a TE message, which includes a DP value of a next relay node generated based on the current speed of the vehicle, such as a DP value setting module 121 and a TE message. Generation module 122 is included.

The DP value setting module 121 measures the current speed of the vehicle by using the position information of the vehicle received from the positioning system, and sets the DP value of the relay node at a specific position based on the measured current speed. do.

Specifically, FIG. 3 is an exemplary view showing the position of a DP value on a straight road, and FIG. 4 is an exemplary view showing the position of a DP value on a curved road, and shows a section in which an unstable signal is received in a radio transmission radius. DP is set inside the damage. The position of the DP is determined at another position according to the speed of the transmitting vehicle A. If the speed of the vehicle A is fast, the DP value of the near queue is set, and if it is slow, the DP value of the far queue is set.

Since the signal-to-noise ratio (SNR) value changes depending on the presence of a device that uses a radio band similar to the environment in which the wireless network is operating, the communication distance value also changes every time. For example, in urban areas with wide lane widths and buildings and numerous wireless devices around the road, the SNR value is high, so the communication distance is naturally shorter, and the secluded roads in the suburbs can communicate because the SNR value is very low. The distance value increases. Accordingly, in the present invention, the size of the 'unstable signal interval' is adjusted by using the SNR value measured at the wireless network physical layer.

Assuming that the radio transmission radius is R, a position close to R has a high probability of not receiving information transmitted by the transmitting vehicle. Therefore, the unstable signal section may be set to 0.1R where the SNR value is low, such as an interstate highway, and about 0.3R when the SNR value is high, such as a city road.

The speed is called S _A when the unit is expressed in m / sec. How many seconds ago the queue should be used to calculate the Diff _A is expressed as in Equation 1 below.

Diff _A = Round ((R-0.2R) / S _A ) ........................ [Equation 1]

As shown in [Equation 1], an integer value is obtained by subtracting 0.2 R of the unstable signal section from the radio radius value R and rounding the result obtained by dividing the value by the current speed of the vehicle. When the transmission radius R of the wireless network technology used is 300 m and the vehicle speeds are 30 km / h, 60 km / h, 90 km / h, 120 km / h, and 150 km / h, the result values according to the speed are shown in [Table 1]. As shown in].

Speed (km / h) Speed (m / s) expression Result value ( Diff ) 30 8.33 (300-0.2 * 300) /8.33 = 28.81 29 60 16.67 (300-0.2 * 300) /16.67 = 14.397 14 90 25.00 (300-0.2 * 300) / 25 = 9.6 10 120 33.33 (300-0.2 * 300) /33.33 = 7.2 7 150 41.67 (300-0.2 * 300) /41.67 = 5.76 6

[Table 1] Reflected queue result value according to vehicle speed

As shown in Table 1, when the current speed of the vehicle is 30 km / h, the DP value setting module 121 according to a characteristic aspect of the present invention sets the position value of 29 seconds before in the circular cue of the vehicle. Select by DP value.

At this time, when a value larger than the size of the circular queue is obtained, the maximum value of the circular queue is set to that value. In other words, a circular queue of size 60 always takes a value of 60 even if the result is greater than 60.

In addition, the TE message generation module 122 generates an emergency message regarding traffic emergency information of a vehicle such as a sudden stop warning, a collision warning, a vehicle failure warning, a tire danger warning, a road construction area warning, a vehicle accident warning, and the like. By including the DP value of the relay node generated by the value generation module 121, it performs a function for generating a TE message.

In addition, the message transmitter 130 transmits the TE message of the emergency vehicle generated by the TE message generator 120 to a transceiver of another vehicle within the message transmission range.

In addition, the message receiver 140 performs a function of receiving a TE message transmitted from the TE message transmitter 130 of another vehicle within the message transmission range.

The wireless communication used in the present embodiment uses V2V communication as a DSRC technology of 5.9 GHz RF, and the message transmission range is set to 1 m to 350 m, preferably 330 m, but the present invention is not limited thereto. Bars may be set differently depending on the wireless network to be used.

In addition, the location determination controller 150 determines the location information between the transmitting and receiving devices existing within a predetermined distance through the positioning system. It is determined whether the vehicle is at the closest distance, and if the vehicle is at the closest distance, the TE message generator 120 generates a second TE message for the next relay node based on the current speed of the vehicle. And transmits the generated second TE message to the transmission / reception apparatus of another vehicle through the message transmitter 130.

That is, since each transceiver can grasp the location information of another vehicle transceiver, the position determination controller 150 of the transceiver closest to the DP value becomes the first relay node. As shown in FIG. 5, the E vehicle becomes the relay node as the first priority according to the distance from the DP value, and has priority in the order of A, C, B, D, and F. FIG.

The transceiver of the vehicle closest to the DP value included in the first TE message (the first relay node) generates a second TE message for the next relay node and automatically transmits it to the transceiver of another vehicle and includes it in the second TE message. The transmission / reception apparatus (second relay node) of the vehicle closest to the received DP value generates a third TE message for the next relay node. That is, such TE message generation and transmission and reception are repeated a predetermined number of times according to the speed of the rear vehicles.

At this time, the position determination controller 150 of the transceiver of the vehicle having the second rank among other vehicles that received the first TE message does not receive the second TE message for the next relay node from the first relay node within a predetermined time. If not, the first relay node determines that the second TE message transmission cannot be performed, and generates and transmits the second TE message. That is, even when the transmission / reception apparatus of the vehicle having the priority cannot transmit, the transmission / reception apparatus of the vehicle having the next priority becomes the relay node to perform the transmission, thereby ensuring transmission reliability of the relay nodes.

And, the transmission and reception apparatus of another vehicle that receives the first TE message within the transmission range of the message between the transmission and reception apparatus, all processes for generating and transmitting the second TE message by receiving the second TE message of the first relay node. Will stop. This is to solve a problem in which information is lost or relay is delayed due to a collision of radio data packets when the transceivers of all vehicles receiving the TE message perform relaying.

 In this embodiment, the predetermined distance from which the location information between the transmitting and receiving devices can be grasped is set to 1m to 350m, preferably 330m, and the predetermined time is set to 1 second to 3 seconds, preferably 2 seconds, but the present invention is limited thereto. It doesn't happen.

6 is a flowchart illustrating a method for transmitting and receiving traffic emergency information using the location record information generating unit 110, the TE message generating unit 120, the message transmitting unit 130, the message receiving unit 140, and the location determining controller 150. And it will be described with reference to Figure 7 as follows.

Traffic emergency information transmission and reception method using the position recording information of the vehicle according to the present invention, as shown in Figure 6, when the emergency situation of the vehicle, DP value setting module 121 is the position of the vehicle received from the positioning system The current speed of the vehicle is measured using the information, the DP value of the relay node is set based on the measured current speed (S10), and the TE message generating module 122 generates an emergency message accordingly, and then repeats the relay. By including in the DP value of the node, the first TE message is generated (S20).

In addition, the message transmitter 130 transmits the first TE message to a transceiver of another vehicle existing within the message transmission range (S30).

In addition, the message receiving unit 140 of each vehicle transmitting and receiving device receives the first TE message (S40), each position determination control unit 150 is another vehicle existing within a predetermined distance from the DP value included in the initial TE message. Using the location information of the, it is determined whether the vehicle is the closest distance from the DP value (S50).

As a result of the determination in step S50, when the vehicle is in the closest distance, the position determination controller 150 measures the current speed of the vehicle through the TE message generator 120 to set the DP value of the next relay node. And generate an emergency message and then include it in a DP value, thereby generating a second TE message for the next relay node, and controlling the second TE message to be transmitted to a transceiver of another vehicle through the message transmitter 130. (S60).

As a result of the determination in step S50, when the vehicle is the vehicle of the next priority rather than the vehicle at the closest distance, the position determination controller 150 of the vehicle transceiver transmits and receives the vehicle at the distance closest to the DP value. It is determined whether a second TE message is received from the device (first relay node) within a predetermined time (S70).

As a result of the determination in step S70, if it is not received within a predetermined time, the position determination controller 150 indicates that the transmission / reception apparatus (first relay node) of the vehicle closest to the DP value does not transmit the second TE message. Determine and generate a second TE message and transmits it to another transceiver (S80). At this time, the second TE message generation method is the same as the above-described first TE message generation method, and as shown in FIG. 7, the TE message generation and transmission and reception are repeated a predetermined number of times according to the speed of the rear vehicles. As a result of the determination of step S70, when received within a predetermined time, all processes for generating and transmitting the second TE message are stopped.

As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, it is a deviation from the scope of the technical idea It will be understood by those skilled in the art that many modifications and variations can be made to the invention without departing from the scope of the invention. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 is a block diagram of a traffic emergency information transmission and reception apparatus using location recording information of a vehicle according to the present invention.

2 is an exemplary view showing a circular position recording information circular queue of a vehicle according to the present invention.

3 is an exemplary view showing a DP value in a straight road according to the present invention.

4 is an exemplary view showing a DP value in a curve road according to the present invention.

5 is an exemplary view showing priority according to a distance from a DP value according to the present invention.

6 is a flowchart illustrating a method for transmitting and receiving traffic emergency information using location recording information of a vehicle according to the present invention;

7 is an exemplary view showing a traffic emergency information relay process according to the present invention.

** Description of symbols for the main parts of the drawing **

100: transceiver 110: location record information generation unit

120: TE message generator 121: DP value setting module

122: TE message generation module 130: message transmitter

140: message receiving unit 150: position determination control unit

Claims (10)

In the traffic emergency information transmission and reception apparatus using the location record information of the vehicle, A location record information generation unit for receiving location information of a vehicle from a separate positioning system such as a satellite navigation device and an inertial navigation device and generating and storing vehicle location record information based on the location information of the vehicle; A TE message generator configured to generate a TE message including a DP value of a next relay node generated based on a current speed of the vehicle; A message transmitter for transmitting a TE message of an emergency vehicle generated by the TE message generator to a transceiver of another vehicle within a message transmission range; A message receiver configured to receive a TE message transmitted from the TE message transmitter of another vehicle existing within the message transmission range; And By determining the location information between the transmitting and receiving devices existing within a predetermined distance, when receiving the first TE message from the emergency vehicle, it is determined whether the vehicle is the closest distance from the first TE message, and if the vehicle is the closest distance In this case, the position determination to generate a second TE message for the next relay node based on the current speed of the vehicle through the TE message generator, and to transmit the generated second TE message to the transceiver of another vehicle through the message transmitter. Control unit; Traffic emergency information transmission and reception device using the location recording information of the vehicle comprising a. The method of claim 1, The TE message generator, A DP value setting module for measuring a current speed of the vehicle by using the position information of the vehicle received from the positioning system, and setting a DP value of the relay node based on the measured current speed; And A TE message generation module for generating a TE message by generating an emergency message when an emergency situation of a vehicle occurs and including the emergency message in a DP value of the relay node; Traffic emergency information transmission and reception apparatus using the location recording information of the vehicle, characterized in that it comprises a. The method of claim 1, The location record information, The emergency information transmission and reception apparatus using the location record information of the vehicle, characterized in that the circular queue form, the location information recording unit records the location of the vehicle for 60 seconds at a 1 second interval. The method of claim 1, The DP value is a traffic emergency information transmission and reception apparatus using the location record information of the vehicle, characterized in that the position value of the next relay node. The method of claim 1, And a predetermined distance from which the location information between the transmission and reception apparatuses can be grasped and the message transmission range between the transmission and reception apparatuses are 1m to 350m. In the traffic emergency information transmission and reception method using the location information of the vehicle, (a) when an emergency situation of a vehicle occurs, transmitting / receiving a TE message including an emergency message and a DP value of a relay node by a transceiver of an emergency vehicle to a transceiver of another vehicle; (b) a plurality of vehicle transceivers receiving the TE message; And (c) Among the plurality of vehicle transceivers, a vehicle transceiver (hereinafter, referred to as a “first relay node”) at a distance closest to the DP value generates a second TE message for a second relay node to transmit and receive another vehicle. Transmitting to the device; Traffic emergency information transmission and reception method using the location record information of the vehicle comprising a. The method of claim 6, In step (a), (a-1) measuring, by the transceiver of the emergency vehicle, the current speed of the vehicle using location information of the vehicle received from the positioning system; (a-2) setting, by the transceiver of the emergency vehicle, a DP value of the relay node based on the measured current speed; And (a-3) generating, by the transceiver of the emergency vehicle, an emergency message and then including the emergency message in a DP value of the relay node; And (a-4) transmitting and receiving the TE message to the transceiver of another vehicle by the transceiver of the emergency vehicle; Traffic emergency information transmission and reception method using the location record information of the vehicle comprising a. The method of claim 6, In step (c), (c-1) determining, by each vehicle transceiver, whether the first relay node is based on its location information, the DP value, and location information of another vehicle; (c-2) If the determination result of step (c-1) indicates that the first relay node is the first relay node, the first relay node sets the DP value of the second relay node based on the current speed of the vehicle and Generating a second TE message by generating the message and including the message in a DP value of the second relay node; And (c-3) the first relay node transmitting the second TE message for the second relay node to a transceiver of another vehicle; Traffic emergency information transmission and reception method using the location record information of the vehicle comprising a. The method of claim 8, As a result of the determination of step (c-1), (c-4) when the self-transmission device is the next priority node other than the first relay node, Determining, by the transceiver of the next priority, whether a second TE message is received from a first relay node within a predetermined time; And (c-5) If it is not received within a predetermined time as a result of the determination of step (c-4), Transmitting, by the transceiver of the next priority, a second TE message for a second relay node to another transceiver; Traffic emergency information transmission and reception method using the location record information of the vehicle, characterized in that it further comprises. The method of claim 9, The predetermined time is a traffic emergency information transmission and reception method using the position recording information of the vehicle, characterized in that 1 second to 3 seconds.

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