KR20180112385A - Test data tracking for V2X communication system and analysis system thereof - Google Patents

Abstract

The purpose of the present invention is to provide a test data tracking method and an analysis system performing the same which easily and efficiently perform a test for a vehicle to everything (V2X) communication system. The present invention relates to a test data tracking method for a V2X communication system, and an analysis system performing the same. According to the present invention, the test data tracking method comprises the steps of: obtaining location information of a first vehicle and data for wireless signals transmitted or received to/from a first V2X communication system provided in the first vehicle; obtaining location information of a second vehicle and data for wireless signals transmitted or received to/from a second V2X communication system provided in the second vehicle; using the location information to configure a map image for displaying a traveling path of the first and second vehicles; and using the wireless signal data to configure a graph image for displaying communication performance changes of the first and second V2X communication systems. The traveling path on the map image and the communication performance changes on the graph image are synchronized with each other based on time to be displayed.

Description

Technical Field [0001] The present invention relates to a test data tracking method for a V2X communication system and an analysis system for performing the test data tracking method,

The present invention relates to a method for tracking data collected during testing of a Vehicle to Everything (V2X) communication system.

Automobiles are being developed in the direction of providing safety, mobility, and convenience with ICT technology. By applying sensors such as radar and vision to the vehicle, the company provides safety support services such as blind zone warning, collision warning and ACC (Adaptive Cruise Control) to the driver. DSRC (Dedicated Short-Range Communications) And provides convenient services such as automatic fare collection and bus guide service.

In recent years, vehicle safety, cooperative autonomous navigation using V2X communication technology, and Cooperative-ITS (C-ITS) technology have been studied. V2X communication technology refers to vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication from the vehicle point of view. Pedestrian to Vehicle (P2V), Pedestrian to Driver (P2D), Pedestrian to Driver (P2V), Pedestrian to Infrastructure (C-ITS), including pedestrian and pedestrian, A comprehensive connection can be considered, including pedestrian to infra-structure (P2I), road sensor network and road-to-infrastructure (R2I) and in-vehicle networks.

Multiple wireless communication technologies are used to provide all the considered connections in a C-ITS environment. For example, WAVE (Wireless Access in Vehicular Environments) communication technology is used for V2V / V2I communication, WLAN or Bluetooth technology is used for P2V / P2I communication, and sensor communication technology can be used for R2I communication have.

On the other hand, the V2X communication system is intended to provide safety and convenience services to all vehicles traveling in the C-ITS environment through V2V or V2I-based cooperative communication. Performance is required.

However, the verification and evaluation of the V2X communication system in actual road environment requires a lot of time and cost due to the characteristics of the test environment, and it is difficult to repeatedly test the same scenario.

It is an object of the present invention to provide a test data tracking method and an analysis system for carrying out the test data tracking method for enabling a test on a vehicle-to-vehicle (V2X) communication system to be carried out easily and efficiently.

A test data tracking method for a V2X communication system according to an exemplary embodiment of the present invention includes a step of transmitting data on a first vehicle and data on a wireless signal transmitted or received in a first V2X communication system provided in the first vehicle Obtaining; Obtaining positional information of a second vehicle and data on a wireless signal transmitted or received in a second V2X communication system provided in the second vehicle; Constructing a map image for displaying a movement path of the first and second vehicles using the obtained position information; And constructing a graph image for indicating a change in communication performance of the first and second V2X communication systems using the obtained wireless signal data, The performance changes are displayed in synchronization with each other on the basis of time.

The analysis system according to an embodiment of the present invention can test the V2X communication system by performing the test data tracking method.

Meanwhile, the steps according to the test data tracking method may be configured as a computer program to be performed in the analysis system according to an embodiment of the present invention, and the computer program may be stored in a computer-readable medium.

In addition, the analysis system for testing the V2X communication system according to an embodiment of the present invention is connected to a V2X communication system and a GPS system provided in a vehicle using wired / wireless communication, A data collector for collecting data on the vehicle and location information of the vehicle; A server for receiving radio signal data and vehicle location information collected by the data collector and storing the received radio signal data and vehicle location information in a database, and transmitting the received radio signal data and vehicle location information; And a graph for displaying a map image for displaying the movement path of the vehicle using the position information received from the server and displaying a communication performance change of the V2X communication system using the wireless signal data received from the server And a client for composing the image.

Here, the wireless signal data may be collected from two or more layers among a plurality of layers constituting the V2X communication system.

According to the embodiment of the present invention, the data for the wireless signal transmitted or received in the V2X communication system is collected and transmitted to the client for analysis so that the test for the vehicle-to-object (V2X) communication system is performed easily and efficiently .

In addition, data is collected for a plurality of layers constituting the V2X communication system, such as received signal information, vehicle communication messages, logic data, and application result values, so that the cause of the problem according to the test result is more accurately analyzed can do.

According to another embodiment of the present invention, by using the wireless signal data collected from the V2X communication system and the location information of the vehicle, it is possible to synchronize and display the change of communication performance between the V2X communication system and the travel route of the vehicle on a time basis And the overall progress of the test in progress or completed can be grasped according to the passage of time.

1 is a block diagram showing the overall configuration of an analysis system according to an embodiment of the present invention.
2 is a diagram for explaining an embodiment of the configuration of the V2X communication system.
3 is a flowchart illustrating an analysis method for testing a V2X communication system according to an exemplary embodiment of the present invention.
4 is a block diagram illustrating an embodiment of a configuration of a data collector.
5 and 6 are diagrams for explaining embodiments of functions and operations of the data collector.
7 is a timing diagram illustrating an embodiment of a method for a data collector to collect wireless signal data from a V2X communication system.
8 is a view for explaining an embodiment of a user interface (UI) provided from a data collector.
9 is a block diagram for explaining an embodiment of a configuration of a data collector having a radio signal generation function.
10 is a block diagram showing an embodiment of a configuration of a server.
11 is a flowchart illustrating a test data tracking method according to an embodiment of the present invention.
12 is a block diagram for explaining an embodiment of a configuration of a client.
13 is a diagram illustrating an embodiment of a user interface (UI) provided for real-time tracking.
14 is a diagram showing an embodiment of a graph image showing a change in communication performance of the V2X communication system.
15 is a flowchart showing an embodiment of a method for obtaining a packet transmission rate (PDR) or a packet error rate (PER) of a V2X communication system.
16 is a diagram illustrating an embodiment of a user interface (UI) for controlling test data tracking.
17 is a diagram showing an embodiment of a method of displaying vehicle information.
18 is a flowchart showing an embodiment of a method for obtaining the inter-vehicle distance.

Hereinafter, a method of analyzing a vehicle-to-object communication system according to the present invention and an analysis system using the same will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms may only be used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

FIG. 1 is a block diagram of an overall configuration of an analysis system according to an exemplary embodiment of the present invention. The analysis system 100 performs an analysis method for testing the V2X communication system 10. FIG.

Referring to FIG. 1, the analysis system 100 may include a data collector 110, a server 120, and a client 130.

The data collector 110 collects data on a wireless signal transmitted or received in the V2X communication system 10. The server 120 transmits wireless signal data collected by the data collector 110 to the client 130, As shown in FIG.

Here, the V2X communication system 10 attaches to a vehicle and periodically transmits packet messages related to vehicle safety and the like, and periodically receives packet messages from a V2X communication system (not shown) attached to another vehicle.

The packet messages transmitted and received between the V2X communication systems include the ID information of the vehicle, the location information and the state information (for example, the traveling direction and speed, the deceleration and acceleration state, etc.) .

The V2X communication system 10 can know the distance between the vehicle to which it is attached and the nearby vehicle and the operation state of the surrounding vehicle by using the packet message periodically received from the V2X communication system of another vehicle as described above, It is possible to judge a dangerous situation.

On the other hand, a hardware module and a software stack to which a technology according to a standard standard is applied are included in the V2X communication system 10 so that a packet message can be transmitted and received between vehicles or between a vehicle and an infrastructure in a propagation environment in which the vehicle moves at high speed within a short period of time do.

For example, WAVE communication technology standardized by IEEE in the United States is a technology that can transmit and receive packet messages between vehicles or vehicles and infrastructures within a short time of up to 1 km within 100 msec in a high-speed propagation environment.

As shown in FIG. 2 (a), the V2X communication system 10 to which the WAVE communication technology is applied may include a V2X communication module, a GPS module, a memory, a processor, and the like.

A processor included in the V2X communication system 10 is a processor for driving a safety application and can be interlocked with a vehicle internal network and can transmit application result values such as various warnings to a driver's display device have.

In addition, the software stack of the WAVE communication system can be divided into software on the kernel and application service software. Here, the software on the kernel includes a device driver, a MAC transmission / reception function, a routing function, an IP packet function, a WSMP safety message function, a management function and an authentication and security protocol function. The application service software includes a vehicle safety service, And an operator interface.

More specifically, the software stack of the WAVE communication system is composed of a plurality of layers as shown in FIG. 2 (b), and the plurality of layers are each designed to satisfy the function and performance of a specific communication standard will be.

Table 1 below shows information on a plurality of standards required for implementing a WAVE communication technology.

Referring to FIG. 2 (b) and Table 1, the WAVE communication technology uses a frequency band of 5.9 GHz and is designed to satisfy IEEE 802.11p and IEEE 1609.x standards.

IEEE 802.11p includes a physical (PHY) layer and a MAC layer for wireless transmission, and the IEEE 1609.x standard includes a multi-channel layer, a network layer, an authentication and security layer, and an application service layer that are mounted on IEEE 802.11p .

The SAE J2735 specification includes a message layer and defines a set of Dedicated Short Range Communication (DSRC) messages that are transmitted and received between vehicles or between the vehicle and the infrastructure.

On the other hand, the SAE J2735 specification includes the message layer, includes the Safety Application layer, and defines the performance requirements and verification standards required for the service.

The V2X communication system 10 according to an exemplary embodiment of the present invention may include a V2X communication module including a plurality of layers to satisfy the WAVE communication standards as described with reference to FIG. 2 and Table 1, The present invention is not limited thereto, and may be in accordance with other inter-vehicle communication standard specifications.

1, the analysis system 100 may include a plurality of data collectors 110, 140, and the plurality of data collectors 110, 140 may include a plurality of V2X communication systems 110, It is possible to collect the radio signal data as described above from the mobile stations 10 and 11.

In this case, the server 120 may collect the radio signal data for all the V2X communication systems 10 and 11 by receiving radio signal data collected from the plurality of data collectors 110 and 140, respectively, The number of data collectors 110, 140 or V2X communication systems 10, 11 through which the wireless signal data is collected by the server 120 may be set to a value of two or more, depending on the capabilities of the analysis system 110 .

While the present invention has been described above by way of example in which the radio signal data for a plurality of V2X communication systems 10 and 11 are collected by a plurality of data collectors 110 and 140, , 11), e. G., By a single data collector 110. < / RTI >

According to an embodiment of the present invention, data from two or more layers among a plurality of layers constituting a communication module of the V2X communication system 10 are collected by the data collector 110 in a test process, (120) to the client (130) to analyze the test results for the V2X communication system (10).

Accordingly, the test for the V2X communication system 10 can be performed easily and efficiently, and in the case where a problem occurs in the test result, it is possible to accurately analyze at what layer the cause of the problem occurs.

Hereinafter, embodiments of a method and system for analyzing a vehicle-to-object communication system according to the present invention will be described in detail with reference to FIG. 3 to FIG.

FIG. 3 is a flowchart illustrating an analysis method for testing a V2X communication system according to an exemplary embodiment of the present invention. Referring to FIG. 3, an analysis method according to an exemplary embodiment of the present invention, In the following description.

Referring to FIG. 3, the data collector 110 collects data on a wireless signal transmitted or received from the V2X communication system 10 (step S300).

The wireless signal data collected in step S300 may be collected from a plurality of layers constituting the V2X communication system 10 and may include received signal information, vehicle communication messages, logic data, application result values, and the like .

Preferably, more than one of the received signal information, the vehicle communication message, the logic data, and the application result value may be collected from the V2X communication system 10 by the data collector 110.

The received signal information includes Received Signal Strength Indicator (RSSI) and Channel Busy Ratio (CBR), which may be data collected from the physical / MAC layer of the V2X communication system 10.

Here, the data collected from the physical / MAC layer of the V2X communication system 10 is not limited to the received signal strength (RSSI) and the channel busy ratio (CBR), and the SNR including the noise information (Signal to Noise Ratio ), And the like.

On the other hand, the vehicle communication message includes Basic Safety Message (BSM) data received from one or more other V2X communication systems (not shown) to the V2X communication system 10, Data collected from the layer.

The BSM includes BSM data elements defined in the SAE J2735 standard and includes, for example, UTC time, Latitude, Longitude, Elevation, Speed, Heading, Data such as system state (traction, abs, scs, brakeBoost, auxBrakes) and vehicle size (Width, Length)

Here, the data collected from the message layer of the V2X communication system 10 is not limited to the above-described data, and further includes data related to the nearby vehicles such as the PATH HISTORY and PATH PREDICTION can do.

The logic data is computed in the V2X communication system 10 using a vehicle communication message received from one or more other V2X communication systems (not shown), and includes the object classification (TC) defined in the SAE J2945 standard, Time-to-collision (TTC), time-to-intersection (TTI), and distance-to-intersection (DTI)

The application result value is determined in the V2X communication system 10 using the calculated logic data. The application result value is a forward collision warning (FCW), an emergency brake warning (EEBL) A vehicle safety application such as Brake Lights, Blind Spot Warning, LCW, Lane Change Warning and Intersection Movement Assist (IMA).

Here, the logic data and application result values may be collected by the data collector 110 from the Safety Application layer of the V2X communication system 10. [

The server 120 transmits at least a part of the wireless signal data collected by the data collector 110 from the V2X communication system 10 to the client 130 in step S300.

Thereafter, the client 130 analyzes the test result of the V2X communication system 10 using the wireless signal data transmitted from the server 120 (step S320).

For example, the client 130 may perform real-time tracking of the test results currently being performed using the wireless signal data transmitted from the server 120, It is possible to perform the performance analysis on the test result that has been completed by receiving the signal data.

Although the functions and operations of the data collector 110, the server 120 and the client 130 constituting the analysis system 100 have been described with reference to FIGS. 1 to 3, And two or more of the components may be merged into one component or some of the functions and operations of the components may be performed by other components.

For example, in the above description, the client 130 analyzes the test result using the wireless signal data transmitted from the server 120. However, At least some of the analysis steps may be performed by the server 120.

The data collector 110 may further collect location information of the vehicle to which the V2X communication system 10 is attached and the collected location information may be synchronized with the wireless signal data collected from the V2X communication system 10, To the client 130 via the network 120.

The client 130 may extract a part of the wireless signal data transmitted from the server 120 and perform the analysis. However, the present invention is not limited thereto, and the server 120 may collect the wireless signal data collected by the data collector 110 The client 130 may extract some data to be analyzed from the wireless signal data and transmit the extracted data to the client 130.

Figure 4 is a block diagram of one embodiment of the configuration of a data collector. The data collector 110 shown includes a core layer 111 and a plug-in layer 112, .

Referring to FIG. 4, the core layer 111 may include an input adapter and an output adapter for data input / output, and a control adapter for a test control interface (TCI). The test control interface (TCI) may be a special protocol that works only with a specific V2X communication system, and may be a standardized protocol.

The data collector 110 is connected to the V2X communication system 10 and the positioning system via the input adapter in a wired or wireless communication manner to transmit data about wireless signals transmitted or received in the V2X communication system 10, It is possible to collect positional information of the user.

The wireless signal data and the position information may be temporarily stored in the database of the core layer 111 in synchronization with each other. The wireless signal data and the position information stored in the database may be exported to a file through an output adapter, Or may be transmitted to the server 120 and uploaded.

On the other hand, test control interfaces (TCIs) may be provided that include conditions for testing the V2X communication system 10 of the vehicle via the control adapter of the core layer 111.

The core layer 111 includes an input manager for managing and controlling the operations of the data collector 110 as described above, an output manager sync, a database manager, a flow manager, a configuration manager, and a status control may be provided.

5, the data collector 110 receives positioning data collected from a positioning system through a source device plug-in of a positioning device using UDP (User Datagram Protocol ).

Also, the data collector 110 can receive the V2X packet, which is the wireless signal data collected from the V2X communication system 10, via the OBU source plug-in using UDP using the Ethernet communication method.

The Ethernet communication method and the UDP protocol are examples of a communication method used by the data collector 110 for collecting data, and the present invention is not limited thereto.

As described above, the V2X packet and the positioning data input through the OBU source plug-in and the positioning device source plug-in are synchronized with each other by the data / procedure manager and then transmitted through the upload sync plug-in May be transmitted to the server 120.

Here, the V2X packet and the positioning data can be uploaded to the server 120 in HTTPS using an LTE (Long Term Evolution) communication method, but the present invention is not limited thereto. For example, various wired / wireless communication methods such as WIFI Can be used.

More specifically, as shown in FIG. 6, the location information (positioning data) and the wireless signal data (V2X packet) are temporarily stored in the database including the system timestamp for time synchronization, 120, < / RTI >

Meanwhile, the V2X packet and positioning data may be output to a file via an output sync plug-in.

As described above, the data collector 110 configures a data input / output interface in an expandable plug-in form to transmit data from various vehicle sensors as well as a V2X communication system and a positioning system by using a communication method such as Ethernet, USB, And can transmit data in various forms using a communication method such as 3G, 4G, Wifi, and file I / O.

7 shows a timing diagram of one embodiment of a method for data collector 110 to collect wireless signal data from V2X communication system 10 and includes the same steps as those described with reference to Figures 1-6, A description of what will be described below will be omitted.

Referring to FIG. 7, the data collector 110 may send a "PKT SETUP" packet to the V2X communication system 10 to set a parameter for testing the V2X communication system 10. [

For this purpose, the data collector 110 may first set communication parameters for performing the test through a user interface (UI) provided as shown in the screen of FIG. 8 may be displayed on the client 130 or may be displayed on the data collector 110 when the data collector 110 includes a display module.

Specifically, the "Logger UI" provided from the data collector 110 includes a first area 810 for displaying on the map information about the location where the test is performed, a V2X / GPS A second area 820 for indicating a packet, location information (latitude, longitude, altitude) and received signal strength (RSSI), and parameters for performing a radio signal performance test, And a third area 830 for identifying the first area 830.

(TID) for identifying the test, a VEHICLE ID for identifying the vehicle, and a device ID (DEVICE ID) for identifying the V2X communication system to be tested through the third area 830, And a radio signal to be tested can be selected.

In addition, the user can activate the transmission / reception mode (TX MODE, RX MODE), set the channel (CHAN), set the transmission / reception antennas (TX ANT, RX ANT) You can set the transmit / receive control (TX CTRL), or set the packet rate (RATE), length (LEN) and interval (INTERVAL).

In the lower portion of the third area 830, the connection with the outside through the input / output plug-ins of the data collector 110 as described above can be respectively set and controlled, and the connection state and the information transmission The state can be confirmed.

The "PKT_SETUP" packet transmitted from the data collector 110 to the V2X communication system 10 includes a "PKT_SETUP " packet including parameters set through the third area 830 of the" Logger UI "Quot; VPCONF "packet to the V2X communication system 10.

The data collector 110 then sends a "PKT_STAT" packet to the V2X communication system 10 to request confirmation of the operational state (normal operation) of the V2X communication system 10, The control unit 10 may transmit the packet VPSTAT to the data collector 110 including information on its operating state (normal operation state).

The operation status confirmation request from the data collector 110 to the V2X communication system 10 and the operation status information response from the V2X communication system 10 to the data collector 110 may be periodically performed.

Thereafter, when the data collector 110 transmits a "PKT_START" packet for notifying the start of data collection to the V2X communication system 10, the packet data PKT_TX and PKT_RX transmitted and received by the V2X communication system 10, Data PKT_GPS may be sent to data collector 110 and begin to be collected.

When data collector 110 transmits a "PKT_STOP" packet to notify completion of data collection to V2X communication system 10, data transmission from V2X communication system 10 to data collector 110 may be terminated.

According to another embodiment of the present invention, the data collector 110 further includes a function of generating a wireless signal to be used for testing of the V2X communication system 10, ) Can be easily performed to test for high risk or repetitive situations.

9 is a block diagram for explaining an embodiment of a configuration of a data collector having a wireless signal generating function, wherein the data collector shown may be implemented in the form of a test box 150 including a V2X communication module 151 have.

9, the test box 150 may include a V2X communication module 151, a GPS module 152, a wireless communication module 153, and a plurality of antennas for wireless signal transmission and reception.

The V2X communication module 151 is configured to include a plurality of layers according to the above-described vehicle communication standard specifications, and can generate a wireless signal including a packet message for vehicle communication and transmit the wireless signal through the antenna.

The configuration and operation of the V2X communication module 151 may be the same as the configuration of the V2X communication system 10 as described above, and a detailed description thereof will be omitted.

The wireless signal generated by the V2X communication module 151 may be transmitted to the V2X communication module 151 in accordance with vehicle communication standard specifications (for example, IEEE 802.11p, IEEE 1609.x, and SAE J2735) Lt; / RTI > message.

Meanwhile, the GPS module 152 may generate a GPS signal including virtual vehicle location information and transmit the GPS signal through the antenna.

The wireless signal generated by the V2X communication module 151 and the GPS signal generated by the GPS module 152 may be received in peripheral V2X communication systems including the V2X communication system 10. [

In this case, the wireless signal received by the V2X communication system 10 and the data of the GPS signal may be collected by the test box 150 through the input interface 154 using a communication method such as Ethernet, CAN, have.

The wireless signal and the GPS signal data collected by the test box 150 are stored in the database 155 and can be uploaded to the server 120 through the wireless communication module 153 using a communication method such as LTE or WIFI .

Also, through the sensor interface 156 provided in the test box 150, various sensing data can be additionally collected from the external environment.

FIG. 10 is a block diagram illustrating an exemplary configuration of a server. The server 120 includes a database 124, a management module 121, a data receiving unit 122, and an output data generating unit 123 Lt; / RTI >

10, the wireless signal data collected by the data collector 110 and uploaded to the server 120 may be stored in the database 124. [

The management module 121 includes an authentication management unit for managing user authentication and the like, a data management unit Data for creating a space for storing new test data and assigning an ID (test ID) a rule manager for managing an analysis rule for extracting data of interest, a report manager for organizing data for a plurality of tests and providing the data as a report, have.

The data receiving unit 122 includes a decompressor, an authenticator, a checker, a filter, and a field mapper. The control unit 121 controls the data receiving unit 122, The data can be collected according to the data.

The output data generator 123 includes a query receiver for receiving data collected through the data receiver 122 and an output data generator for outputting the input data to the client 130 can do.

The server 120 first generates a test ID for identifying the test through the management module 121 and uploads the collected data from the data collector 110 through the data receiving unit 122, 130).

For example, the decompression unit of the data receiving unit 122 selectively performs decompression of the raw data collected by the data collector 110, the authentication unit performs authentication for the user, The range of the raw data value (Value range) and the test ID (TEST ID) can be confirmed.

Thereafter, after invalid data is filtered by the filter, the field mapping unit can use the test ID (TEST ID) and the vehicle ID (VEHICLE ID) to optimize the data field and reconstruct the data structure.

The data output from the field mapping unit may be composed of basic data to be transmitted to the client 130 by the output data generation unit 123.

Meanwhile, the basic data configured as described above may be divided into test IDs (TEST IDs) and stored in the database 124.

The client 130 can analyze the test result for the V2X communication system 10 using the basic data transmitted from the server 120. [

According to an embodiment of the present invention, the communication performance change of the V2X communication system 10 and the movement route of the vehicle are synchronized on a time basis using the wireless signal data collected from the V2X communication system 10 and the location information of the vehicle The information such as the overall progress of the test being performed or completed can be grasped according to the passage of time.

Here, the communication performance of the V2X communication system 10 may mean performance related to communication between the V2X communication system 10 and other V2X communication systems.

For this purpose, the data collector 110 is connected to the V2X communication system and the positioning system provided in the vehicle using wired / wireless communication, and can collect data on the wireless signal transmitted and received in the V2X communication system and position information of the vehicle .

The server 120 may receive the radio signal data and the vehicle location information collected by the data collector 110 and store the received radio signal data and the vehicle location information in the database, and may transmit the received radio signal data and the vehicle location information to the client 130.

The client 130 constructs a map image for displaying the movement path of the vehicle using the location information received from the server 120 and transmits the map image to the V2X communication unit 120 using the wireless signal data received from the server 120. [ A graph image can be configured to display the communication performance change of the system.

Hereinafter, embodiments of a test data tracking method for a V2X communication system according to the present invention will be described in more detail with reference to FIGS. 11 to 18. FIG.

11 is a flowchart illustrating a test data tracking method according to an embodiment of the present invention. The wireless signal data and the vehicle location information collected by the data collector 110 of the analysis system 100 are transmitted to the server 120 through the server 120 Client 130 to track test data for the V2X communication system.

Referring to FIG. 11, the client 130 acquires position information of the first vehicle and data on the wireless signal transmitted or received in the first V2X communication system provided in the first vehicle (S1100).

In addition, the client 130 obtains the location information of the second vehicle and the data of the wireless signal transmitted or received in the second V2X communication system provided in the second vehicle (S1110).

The method by which the client 130 obtains the positional information and the radio signal data of the V2X communication system in the steps S1100 and S1110 are performed by the data collector 110 as described with reference to Figs. The location data and the wireless signal data are collected from the positioning system and the V2X communication system provided in the vehicle and the collected data can be transmitted to the client 130 through the server 120. [

Here, the data collector 110 may collect radio signal data from a plurality of layers constituting the V2X communication system, and may transmit and receive radio signal data among the radio signal data collected from the first and second V2X communication systems, Signal strength (RSSI), etc. may be transmitted from the server 120 to the client 130.

Thereafter, the client 130 constructs a map image for displaying the movement paths of the first and second vehicles using the position information obtained in steps S1100 and S1110 (step S1120), and steps S1100 and S1110 (Step S1130). In step S1130, the first and second V2X communication systems communicate with each other using the wireless signal data.

After the graph image is formed, the client 130 may update the communication performance graph image configured in step S1130 using the wireless signal data to be transmitted.

That is, since the client 130 can receive the wireless signal data late due to the network delay occurring during the data collected in real time in the data collector 110 to the server 120, (RSSI), packet error rate (PER), and the like can be continuously updated.

12 is a block diagram illustrating an embodiment of a client according to an embodiment of the present invention. The client 130 includes a database 131, a data acquisition unit 132, a preprocessor 133, and a tracking unit 134 And the like. Operations of the client 130 shown in FIG. 12 will not be described below with respect to the same descriptions as those described with reference to FIG. 1 to FIG.

12, the vehicle position information received from the server 120 through the data acquisition unit 132 of the client 130 and the wireless signal data of the V2X communication system may be stored in the database 131. [

For this purpose, the data acquisition unit 132 may include a decompression unit for selectively performing decompression on data received from the server 120, an authentication unit for performing user authentication, and a test ID And a query generating unit for querying the data.

The preprocessing unit 133 may perform preprocessing such as aggregation, search, and mapping on the data acquired through the data acquisition unit 132. [

On the other hand, the tracking unit 134 calculates performance indicators for tracking test data using the data preprocessing result output from the preprocessing unit 133, and constructs an image representing the performance indicators by updating the calculated performance indicators in real time .

More specifically, the packet error calculation unit of the tracking unit 134 calculates the packet error rate (PER) of the V2X communication system, and the position calculation unit can calculate the vehicle-to-vehicle distance and the like.

The image forming unit of the tracking unit 134 constitutes a map image for displaying the moving path of the vehicle according to the passage of time. The image forming unit of the tracking unit 134 generates a received signal strength (RSSI), a packet transmission rate (PDR) or a packet error rate (PER).

The map image and the graph image constructed as described above can be displayed on the screen through a display module (not shown) provided or connected to the client 130. [

When a test ID (TEST ID) to be tracked in real time is selected after real-time tracking of test data is selected in the analysis system 100, a user interface (UI) as shown in FIG. 130).

13, the real-time tracking screen may include a map area 1310, a real-time performance index area 1320, a test information area 1330, a control area 1340, and a vehicle information area 1350 .

In the map area 1310, a map image showing the position of each vehicle at the current time is displayed along with the travel path of the vehicles participating in the test, and the current position of the vehicles can be updated in real time according to the flow of time on the map image.

The map image is automatically scrolled so as to display the moving path and the current position of all the vehicles, and the enlargement / reduction ratio is changed, but only the moving path and the current position of the selected vehicle in the vehicle information area 1350 are set to be displayed It is possible.

Graphs showing packet transmission rate (PDR), received signal strength (RSSI), GPS error, and vehicle speed change up to the current point of time are displayed in the real-time performance index area 1320, You can see at a glance whether the test is being performed normally.

The current time position of the vehicle is updated on the map image displayed in the map area 1310 in real time and the communication performance index up to the current time is displayed in real time on the graph image displayed in the real time performance indicator area 1320 As a result, the vehicle movement path on the map image and the communication performance change on the graph image can be displayed in synchronization with each other on the basis of time.

That is, as the vehicle participating in the test moves, a mark indicating the current position of the vehicle is moved on the map image, and a PDR, a received signal strength (RSSI), a GPS error GPS Error) or the vehicle speed (Velocity) are changed in real time, the values at the current position of the vehicle can be finally displayed on the rightmost side.

14, the first graph image 1321 displayed in the real-time performance indicator area 1320 includes a first graph image 1321 indicating a change in the packet error rate (PER) for each of the V2X communication systems included in the vehicles participating in the test, As shown in Fig.

In addition, the second graph image 1322 displayed in the real-time performance indicator area 1320 is divided into different colors by the RSSIs for the V2X communication systems included in the vehicles participating in the test .

In the test using the reference GPS, a change in the GPS error with respect to the positional information of each vehicle appears in real time in the third graph image 1323. In the fourth graph image 1324, It is color-coded and can be displayed in real time.

The received signal strength RSSI of the V2X communication systems is updated in real time according to data collected from each V2X communication system by the data collector 110 and transmitted to the client 130 through the server 120 Can be displayed.

The velocities of the vehicles may also be updated and displayed in real time according to the data collected by the data collector 110 from the positioning system of each vehicle and transmitted to the client 130 via the server 120 have.

The packet transfer rate (PDR) or the packet error rate (PER) of the V2X communication systems is calculated by dividing the data collected from each V2X communication system by the data collector 110 and transmitted to the client 130 through the server 120 Can be calculated by mapping.

The fifth graph image 1325 displayed in the real-time performance index area 1320 may be displayed in a color different from that of the vehicles participating in the test, Lt; RTI ID = 0.0 > 1350, < / RTI >

FIG. 15 is a flowchart illustrating an embodiment of a method of determining a packet transmission rate (PDR) or a packet error rate (PER) of a V2X communication system.

Referring to FIG. 15, the preprocessing unit of the client 130 maps transmission packets having characteristics corresponding to each other among the transmission / reception packets collected from the first and second V2X communication systems to a reception packet (step S 1500).

For example, for each packet data (TX data) transmitted from the first V2X communication system, the corresponding packet data (TX data) in the time range (Ti + α) from the transmission time Ti to the passage of the predetermined time It can be retrieved whether or not packet data (RX data) having the same signature as the transmission packet data (TX data) has been received in the second V2X communication system.

According to the search result, a mapping graph may be generated for all pairs of TX data and RX data having the same characteristics.

More specifically, in an inter-vehicle communication method based on a broadcast (brackcast) transmission based on a WAVE / DSRC, since an identifier is written for each packet transmitted wirelessly, in the receiving system, an identifier (A) (PDR) or a packet error rate (PER) may be calculated by combining (1, 2).

Also, the calculation for the packet error rate (PER) may be omitted for the meaningless interval, and for example, the packet error rate (PER) can be calculated only for the period in which both the sender (Tx) and the receiver (Rx) have.

Then, the tracking unit of the client 130 calculates a packet transmission rate (PDR) or a packet error rate (PER) for each of the first and second V2X communication systems based on the mapping result in step S1500 (step S1510 ).

In step S1510, the packet delivery ratio (PDR) or the packet error rate (PER) may be calculated using the mapping data between the first and second vehicles having different vehicle IDs, May be updated after being sampled or averaged over a period of time and displayed in the graph image.

Meanwhile, a test ID (TEST ID) and test execution time information for identifying a test currently being tracked are displayed in the test information area 1330, and a description of the corresponding test data tracking method may be displayed have.

In the control area 1340, a user interface (UI) for controlling tracking of test data may be provided.

Referring to FIG. 16, a time corresponding to the current time is displayed in the control area 1340, and a plurality of buttons 1341 to 1347 for controlling tracking may be provided.

For example, the user can pause or resume real-time tracking by pressing the first button 1341 and press the second button 1342 to move the tracking point to the most recent data (i.e., data at the current point in time) .

The tracking for the test data as described above may be performed not only in real time tracking of the currently performed test but also in the test data stored in the database of the server 120 so that tracking is performed according to the time .

In this case, the user can press any one of the third to sixth buttons 1343 to 1346 to change the tracking speed to the corresponding speed.

On the other hand, when the user presses the seventh button 1347, the test data can be tracked at the maximum speed according to the environment of the analysis system 100.

In the vehicle information area 1350, information on all vehicles participating in the test may be displayed.

Further, when there is no data to be played back for more than a preset time (for example, several seconds) during tracking of the test data, the playback speed may be automatically changed to the maximum speed as long as the interval of data to be played back exists.

17, a vehicle ID, a transmission / reception data amount (# of TX / RX), a data transmission rate (Data Rate), and a data transmission strength (data ID) of each of a plurality of vehicles are stored in the vehicle information area 1350 TX Power, Packet Length, Inter-Vehicle Distance (Dist. To), and Total Travel Distance (Traveled).

In addition, in the vehicle information area 1350, a reference vehicle is selected when calculating the vehicle-to-vehicle distance (Dist. To) among a plurality of vehicles, and a user who selects a vehicle An interface (UI) may be provided.

The user can select the index of the vehicle as the distance display reference in the box 1351 displayed at the distance (Dist. To) between the vehicles.

FIG. 18 is a flowchart showing an embodiment of a method for obtaining a vehicle-to-vehicle distance.

Referring to FIG. 18, the preprocessing unit of the client 130 searches positional information corresponding to each other temporally among the positional information of the first and second vehicles (S1800).

For example, when the position information is collected from the positioning system provided in the first vehicle, the position information is acquired from the positioning system provided in the second vehicle at the same time (Ti + -) within the collection time point Tc and the predetermined error The collected location information can be retrieved.

On the other hand, the location information corresponding to the packet transmission / reception time may not exist. In this case, it is possible to use the coordinates close to the position of the received packet, or calculate the position using two temporally adjacent coordinates as time ratios, And the estimated position using the velocity can be used.

Thereafter, the tracking unit of the client 130 calculates the distance between the first and second vehicles based on the search result in step S1800 (step S1810).

In step S1810, the first and second vehicle distances may be calculated using position information retrieved from the first and second vehicles having different vehicle IDs at the same time, The result value can be updated after sampling or averaging for a certain period of time.

Also, the user can select the check boxes 1354 and 1355 displayed in the vehicle-specific index to set the current position of the vehicle to be always displayed on the map image, and select the check box 1353 at the top, The selection and the deselection may be set to be selected.

While the present invention has been described with reference to the case of tracking and analyzing the communication performance between the V2X communication systems provided in the vehicle, the present invention is not limited thereto.

For example, as shown in FIG. 13, information about a base station communicating with nearby vehicles may be additionally displayed in the vehicle information area 1350, and the location and communication performance of the base station may be displayed in the map area 1310. [ And the real-time performance indicator area 1320. [

The method of tracking information, location, and communication performance of the base station may be the same as that described above with reference to the drawings, so a detailed description thereof will be omitted.

According to another embodiment of the present invention, the client 130 may acquire motion picture data shot by a camera provided in the vehicle and reproduce the motion picture data on the real time tracking screen as shown in FIG.

In this case, the moving picture data to be reproduced can be synchronized on the basis of the change in the communication performance on the movement path and the graph image on the map image as described above.

In the above description, the method and system for analyzing the vehicle-to-object communication system according to the embodiment of the present invention have been described taking the North American Vehicle Communication Standard (WAVE) as an example, but the present invention is not limited thereto.

For example, the method and system for analyzing a vehicle-to-object communication system according to the present invention can be applied to various vehicle communication standards such as Europe or Japan.

The method according to an embodiment of the present invention may be stored in a computer-readable recording medium. The computer-readable recording medium may be a ROM, a RAM, a CD-ROM , A magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes and code segments for implementing the above method can be easily inferred by programmers of the technical field to which the present invention belongs.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

Claims (22)

A method for tracking test data for a V2X communication system,
Obtaining positional information of a first vehicle and data on a wireless signal transmitted or received in a first V2X communication system provided in the first vehicle;
Obtaining positional information of a second vehicle and data on a wireless signal transmitted or received in a second V2X communication system provided in the second vehicle;
Constructing a map image for displaying a movement path of the first and second vehicles using the obtained position information; And
And constructing a graph image for indicating a change in communication performance of the first and second V2X communication systems using the obtained radio signal data,
Wherein the movement path on the map image and the communication performance change on the graph image are displayed in synchronism with each other based on time. The method of claim 1,
Wherein the first and second V2X communication systems comprise received and received packets and Received Signal Strength Indicator (RSSI). 3. The method of claim 2,
Mapping transmission and reception packets having characteristics corresponding to each other among transmission and reception packets collected from the first and second V2X communication systems; And
And calculating a Packet Delivery Rate (PDR) or Packet Error Rate (PER) of the first and second V2X communication systems based on the mapping result. 4. The method of claim 3, wherein the graph image
(PDR) or packet error rate (PER) of the first and second V2X communication systems is updated and displayed in real time. 3. The method of claim 2, wherein the graph image
Wherein the received signal strength (RSSI) collected from the first and second V2X communication systems is updated in real time and displayed. The method according to claim 1,
And configuring a graph image to update and display the speed of the first and second vehicles in real time using the obtained position information of the first and second vehicles. The method according to claim 1,
Searching for positional information corresponding to each other in time among the positional information of the first and second vehicles obtained; And
And calculating a distance between the first and second vehicles based on the search result. 8. The method of claim 7,
And constructing a graph image for updating and displaying the distance between the calculated first and second vehicles in real time. The method according to claim 1,
Further comprising: providing a user interface (UI) for controlling pause and resume of tracking of the test data, movement to the current point of time, and tracking rate. The method according to claim 1,
Displaying at least one of a vehicle identifier, an amount of data to be transmitted and received, a data transmission speed, a data transmission strength, a packet length, an inter-vehicle distance, and a total travel distance for each of a plurality of vehicles including the first and second vehicles; Lt; / RTI > 11. The method of claim 10,
Providing a user interface (UI) for selecting a vehicle on which the vehicle-to-vehicle distance calculation is to be performed among the plurality of vehicles or a vehicle on which the moving route is to be displayed in the map image. The method according to claim 1,
And acquiring and reproducing moving picture data photographed by a camera provided in at least one of the first and second vehicles,
Wherein the recreated moving picture data is synchronized with a moving path on the map image and a communication performance change on the graph image based on time. 13. A computer program stored on a medium for carrying out the method of any one of claims 1 to 12. 12. An analysis system for performing the method of any one of claims 1 to 12. 1. An analysis system for testing a V2X communication system,
A data collector connected to the V2X communication system and the positioning system of the vehicle through wired / wireless communication to collect data on a wireless signal transmitted or received in the V2X communication system and position information of the vehicle;
A server for receiving radio signal data and vehicle location information collected by the data collector and storing the received radio signal data and vehicle location information in a database, and transmitting the received radio signal data and vehicle location information; And
A map image for displaying the moving route of the vehicle using the location information received from the server, and a graph image for displaying the communication performance change of the V2X communication system using the wireless signal data received from the server And a client for constructing the analysis system. 16. The method of claim 15,
Wherein the at least one layer is collected from at least two of a plurality of layers constituting the V2X communication system. 16. The method of claim 15,
Wherein the movement path on the map image and the communication performance change on the graph image are displayed in synchronization with each other based on time. 16. The method of claim 15, wherein the graph image
(PDR), a packet error rate (PER), and a received signal strength (RSSI) of the V2X communication system in real time. 16. The method of claim 15,
And a graph image for renewing and displaying the speed of the vehicle or the distance to another vehicle in real time. 16. The method of claim 15,
(UI) for controlling the pause and resume of tracking of the test data, the movement to the current point of time, and the tracking rate. 16. The method of claim 15,
For each of a plurality of vehicles including the vehicle, at least one of a vehicle identifier, a data transmission rate, a data transmission rate, a data transmission strength, a packet length, a distance between vehicles, . 22. The method of claim 21, wherein the client
And a user interface (UI) for selecting a vehicle on which the vehicle-to-vehicle distance calculation is to be performed among the plurality of vehicles or a vehicle on which the travel route is to be displayed in the map image.

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