KR101941855B1 - System for evaluating performance of v2x communication - Google Patents

Abstract

The present invention relates to a system for evaluating performance of vehicle to everything (V2X) communication. According to the present invention, the system for evaluating performance of V2X communication comprises: a tested device for transmitting and receiving data with V2X communication standard; a measurement device measuring transmission/reception performance according to the V2X communication standard of the tested device; and a central server located to be remote from the tested device and the measurement device to control the tested device and the measurement device.

Description

[0001] V2X COMMUNICATION PERFORMANCE EVALUATION SYSTEM [0002]

The present invention relates to a V2X communication performance evaluation system.

Conventionally, there is a problem that the V2X communication performance measured by the measuring apparatus can be confirmed only by the measuring apparatus or stored in a separate removable storage.

Conventionally, there is a problem in that it is not possible to immediately deal with the detected problem because there is a time interval for measuring the V2X communication performance and a time interval for monitoring the measured V2X communication performance.

In the past, there has been a problem in that when the measuring apparatus is constituted by one physical mechanical apparatus and the standard specification is changed or the test environment is changed, the measuring apparatus itself must be changed to a new one.

The positional information of the EUT to be measured is not considered in the evaluation of the V2X communication performance.

There is a problem that the V2X communication performance and the location information of the devices are not effectively monitored even if the device under test and the measuring device are controlled remotely due to the lack of the user interface.

In the past, even if the V2X communication performance is directly measured in the field, there is a problem that the data can not be directly monitored or analyzed in the field, and the data must be transferred to the center for monitoring or analysis.

In order to solve the above problems, an object of the present invention is to provide a communication performance evaluation system including a measurement device capable of wirelessly transmitting measured V2X communication performance and position information.

It is another object of the present invention to provide a method of delivering V2X communication performance measured in the field to a central server in real time.

It is another object of the present invention to provide a measurement method capable of flexibly coping with a change of a standard specification and a change of a test environment.

It is another object of the present invention to provide a method by which position information of a device under test can be considered for V2X communication performance evaluation.

It is another object of the present invention to provide a method for effectively monitoring information of a measurement apparatus and a device under test.

Another object of the present invention is to provide a method for directly monitoring and analyzing V2X communication performance measured in the field.

In order to achieve the above object, a V2X communication performance evaluation system according to the present invention is an apparatus under test (V2X) for transmitting and receiving data through a V2X (Vehicle to Everything) communication standard, A first RTK module for measuring the position of the DUT using information of an RF (Radio Frequency) module for transmitting and receiving data, a Radio Technical Commission for Maritime Services (RTCM) Evolution) network, and the measurement device measures a transmission / reception performance according to the V2X communication standard of the EUT, wherein the measurement device measures the V2X communication standard of the EUT A second RTK module for measuring the position of the measuring device using RTCM information, a second RTK module for measuring the position of the measuring device, a CAN protocol A CAN module for collecting traveling information of the measuring device, and a second LTE router for transmitting the measured V2X communication performance, the measured position information of the measuring device, and the traveling information of the collected measuring device in real time via the LTE network And a central server which is remotely located from the DUT and the measuring device and which controls the DUT and the measuring device, wherein the central server transmits the location information of the DUT, The V2X communication performance, the location information of the measuring apparatus, and the traveling information of the measuring apparatus in real time, and evaluate the V2X communication performance using the information received by the central server.

According to another embodiment of the present invention, the EUT includes a vehicle terminal supporting the V2X communication standard and a roadside base station supporting the V2X communication standard, the vehicle terminal being mounted on a test vehicle, The device is mounted on a measuring vehicle running on the measurement site, and can directly measure the transmission / reception performance according to the V2X communication standard in the field.

According to another embodiment of the present invention, the central server includes software and a display module for evaluating the measured V2X communication performance, and the central server executes the software to evaluate the received V2X communication performance , The central server executes a user interface to expose the evaluation result of the V2X communication performance through the display module, and the central server executes the user interface, The position information of the measuring apparatus and the running information of the measuring apparatus can be displayed in real time through the display module.

According to another embodiment of the present invention, the measurement apparatus further includes a control unit and a display module for controlling operations of the V2X module, the second RTK module, the CAN module, and the second LTE router, Accessing the central server using the operating system and executing software installed in the central server to evaluate the measured V2X communication performance directly in the field, and the controller executes the user interface installed in the central server to access the V2X The evaluation result of the communication performance can be displayed through the display module.

According to another embodiment of the present invention, the V2X communication performance evaluation system may include a plurality of devices under test, and the measurement device may simultaneously measure the V2X communication performance of the plurality of devices under test.

The present invention can provide a communication performance evaluation system including a measurement device capable of wirelessly transmitting the measured V2X communication performance and position information.

The present invention can provide a method of transmitting measured V2X communication performance in the field to a central server in real time.

The present invention can provide a measurement method capable of flexibly coping with a change of a standard standard and a change of a test environment.

The present invention can provide a method by which the location information of the EUT can be considered in the V2X communication performance evaluation.

The present invention can provide a method for effectively monitoring information of a measurement apparatus and a device under test.

The present invention can provide a method for directly monitoring and analyzing the V2X communication performance measured in the field.

1 is a diagram illustrating a configuration of a V2X communication performance evaluation system according to an embodiment of the present invention.
2 is a diagram illustrating a configuration of a V2X communication performance measuring apparatus according to an embodiment of the present invention.
3 is a diagram illustrating a configuration of a V2X communication performance evaluation system according to another embodiment of the present invention.
4 is a diagram illustrating a configuration of a chassis for measuring V2X communication performance according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a configuration of a V2X communication performance evaluation system according to another embodiment of the present invention.
6 is a block diagram of a chassis control unit according to an embodiment of the present invention.
7 is a block diagram of a V2X OBU / RSE device card according to an embodiment of the present invention.
8 is a diagram illustrating a measurement result of a reception performance of a V2X OBU / RSE device card according to an embodiment of the present invention.
9 is a diagram illustrating a configuration of an RTK rover card according to an embodiment of the present invention.
10 is a diagram illustrating a configuration of a WIFI and CAN acquisition card according to an embodiment of the present invention.
11 is a diagram illustrating a configuration of a mobile BS according to an embodiment of the present invention.
FIG. 12 is a block diagram illustrating a configuration of an indoor verification apparatus according to an embodiment of the present invention.
13 is a diagram illustrating a configuration of an interoperability test system according to an embodiment of the present invention.
FIG. 14 is a diagram illustrating a configuration of a basic functional test system according to an embodiment of the present invention.
15 is a diagram illustrating a configuration of a V2X standard validity and message conformity assessment system according to an embodiment of the present invention.
16 is a diagram illustrating a configuration of a mobile verification system according to an embodiment of the present invention.
17 is a diagram illustrating a configuration of a mobile verification system according to another embodiment of the present invention.
18 is a diagram illustrating a configuration of a user interface for evaluating V2X communication performance according to an embodiment of the present invention.
19 is a diagram illustrating the configuration of an evaluation test information item of a user interface according to an embodiment of the present invention.
20 is a diagram illustrating a configuration of a general setting item of a user interface according to an embodiment of the present invention.
21 is a diagram illustrating a configuration of a streaming setting item of a user interface according to an embodiment of the present invention.
22 is a diagram illustrating a configuration of a map setting item of a user interface according to an embodiment of the present invention.
23 is a diagram illustrating a configuration of a graph setting item of a user interface according to an embodiment of the present invention.
24 is a diagram illustrating a configuration of a monitor setting item of a user interface according to an embodiment of the present invention.
25 is a diagram showing a configuration of an evaluation requirement setting item of a user interface according to an embodiment of the present invention.
26 is a diagram showing a configuration of a user interface showing the evaluation result of V2X communication performance according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention unclear.

First, terms used in this specification are defined as follows.

SSH is an abbreviation of secure shell. It is a system that can encrypt and decrypt messages by accessing remote system using public key cryptosystem like PGP.

RTK (Real Time Kinematic) is a real-time moving precision measurement technology, and it is a high-precision and advanced technology to maintain error of several centimeters mainly in a satellite navigation system.

Rover is a receiver used to determine the location of a missile in a GPS.

Virtual Reference Station (VRS) is a virtual reference station (VRS) that corrects distance-dependent errors that are inaccurate in proportion to the distance from a reference station in a real-time mobile survey (RTK) Network RTK method. The VRS survey is modeled by separating and modeling the error using one of the Network RTK GPS surveying methods using the standard station network consisting of GPS station, generating the same virtual reference point as observed from any position in the network, And the position of a precise mobile station is determined through real-time mobile measurement with the mobile station.

GPIB (General Purpose InterfaceBus) is a communication standard for connecting computers and peripherals.

Gigabit Ethernet is an Ethernet transmission technology that provides gigabit per second speed and is defined in the IEEE 802.3-2008 standard.

The L band collectively refers to GPS signals in the frequency band between 1 and 2 GHz.

The Global Navigation Satellite System (GNSS) is a system that provides information on the location, altitude, and speed of terrestrial objects using summarized satellites.

GLONASS is distributed to all base stations to 3-axis position, speed determination and time stamp of Russian space station radio navigation system. GLONASS resembles in many points with US GPS, but the difference is that 24 satellites are arranged in 3 orbit .

QZSS or Juntencho is a GNSS system developed by Japan. QZSS is only for Japan, whereas US GPS is for the whole world. It covers 24 hours with four Mitchi satellites staying in Japan for 8 hours.

Vader is a satellite for GPS (Global Positioning System) developed by China. It also refers to China's GPS system itself.

The Galileo system is the world's first civil satellite positioning system (GPS), jointly promoted by the European Union (EU) and the European Space Agency (ESA), against the US GPS monopoly.

An MCU (Micro Controller Unit) is a computer that has a microprocessor and an input / output module formed into one chip and performs predetermined functions.

An FPGA is an interdigitated integrated circuit (IC) that is manufactured to verify the operation and performance of the hardware before it has already been designed into the semiconductor.

1 is a diagram illustrating a configuration of a V2X communication performance evaluation system according to an embodiment of the present invention.

The V2X communication performance evaluation system 1010 according to an embodiment of the present invention may include a device under test 1020, a measurement device 1030, and / or a central server 1040. Here, the measuring apparatus 1030 may have the same meaning as the V2X communication performance measuring apparatus.

The EUT can transmit and receive data through the V2X (Vehicle to Everything) communication standard. The apparatus includes an RF (Radio Frequency) module for transmitting and receiving data according to the V2X communication standard, a first RTK module for measuring a position of the EUT using information of Radio Technical Commission for Maritime Services (RTCM) And a first LTE router that transmits the measured location information of the EUT in real time via an LTE (Long Term Evolution) network.

The measuring apparatus can measure the transmission / reception performance of the apparatus under test according to the V2X communication standard. The measuring device includes a V2X module for measuring the transmission / reception performance according to the V2X communication standard of the EUT, a second RTK module for measuring the position of the measuring device using the RTCM information, A CAN module for collecting information, and a second LTE router for transmitting the measured V2X communication performance, the position information of the measured measurement device, and the travel information of the collected measurement device in real time via the LTE network.

The central server can be remotely located from the EUT and the measuring apparatus to control the EUT and the measuring apparatus. The central server receives the location information of the EUT, the measured V2X communication performance, the location information of the measuring apparatus, and the running information of the measuring apparatus in real time via the LTE network, The V2X communication performance can be evaluated.

According to another embodiment of the present invention, the EUT includes a vehicle terminal supporting the V2X communication standard and a roadside base station supporting the V2X communication standard, the vehicle terminal being mounted on a test vehicle, The device is mounted on a measuring vehicle running on the measurement site, and can directly measure the transmission / reception performance according to the V2X communication standard in the field.

According to another embodiment of the present invention, the central server includes software and a display module for evaluating the measured V2X communication performance, and the central server executes the software to evaluate the received V2X communication performance , The central server executes a user interface to expose the evaluation result of the V2X communication performance through the display module, and the central server executes the user interface, The position information of the measuring apparatus and the running information of the measuring apparatus can be displayed in real time through the display module.

According to another embodiment of the present invention, the measurement apparatus further includes a control unit and a display module for controlling operations of the V2X module, the second RTK module, the CAN module, and the second LTE router, Accessing the central server using the operating system and executing software installed in the central server to evaluate the measured V2X communication performance directly in the field, and the controller executes the user interface installed in the central server to access the V2X The evaluation result of the communication performance can be displayed through the display module.

According to another embodiment of the present invention, the V2X communication performance evaluation system may include a plurality of devices under test, and the measurement device may simultaneously measure the V2X communication performance of the plurality of devices under test.

2 is a diagram illustrating a configuration of a V2X communication performance measuring apparatus according to an embodiment of the present invention.

The V2X communication performance measuring apparatus 2010 according to an embodiment of the present invention includes a V2X module 2020, an RTK module 2030, a CAN module 2040, an LTE router 2050, and / or a control unit 2060 .

The V2X module can measure the transmission / reception performance using the V2X (Vehicle to Everything) communication standard of the EUT. The EUT may include a vehicle terminal supporting V2X communication and a roadside base station supporting V2X communication.

The RTK module can measure the position using the Radio Technical Commission for Maritime Services (RTCM) information.

The CAN module can collect vehicle driving information using the CAN protocol. The CAN module may include a WIFI module for transmitting / receiving data through WIFI (Wireless Fidelity) and a BT module for transmitting / receiving data through BT (Bluetooth).

The LTE router can transmit the measured V2X communication performance, the measured location information, and the collected travel information to a central server located remotely in real time via an LTE (Long Term Evolution) network.

The control unit may control operations of the V2X module, the RTK module, and the CAN module. The V2X module, the RTK module, the CAN module, the LTE router, and the controller may be mounted on the V2X communication performance measuring device in a card form.

According to another embodiment of the present invention, the V2X module includes an RF unit for receiving an RF (Radio Frequency) signal according to the V2X communication standard and converting the received RF signal into an analog I / Q signal, A modem unit for decoding the converted digital I / Q signal in accordance with the V2X communication standard and measuring the V2X communication performance of the decoded signal, a data conversion unit for converting the / Q signal into a digital I / Q signal, And a control unit for controlling operations of the data conversion unit and the modem unit.

According to another embodiment of the present invention, the RTK module includes an RF unit for receiving the RTCM information for position correction, an RTK unit for measuring a position with an accuracy of 1 cm and 1 ppm using the received RTCM information, And a controller for controlling the RTK unit, wherein the RTK unit can support GPS, GLONASS, QZSS, and Beidou.

According to another embodiment of the present invention, the V2X communication performance measuring apparatus further includes a display module, wherein the control unit accesses the central server using an installed operating system, executes software installed in the central server, The measured V2X communication performance can be evaluated, and the controller can display the evaluation result of the V2X communication performance through the display module by executing a user interface installed in the central server.

According to another embodiment of the present invention, the measured V2X communication performance includes a PER (Packet Error Rate) performance, a Latency performance, a data throughput performance, a maximum effective communication distance performance, and a Received Signal Strength Indicator performance.

3 is a diagram illustrating a configuration of a V2X communication performance evaluation system according to another embodiment of the present invention.

The V2X communication performance evaluation system 3010 according to another embodiment of the present invention may include a device under test 3020, a measurement device 3030, and / or a central server 3040. The central server may configure a user interface 3050.

The EUT can transmit and receive data through the V2X (Vehicle to Everything) communication standard. Wherein the EUT comprises a first LTE router for transmitting the location information of the EUT in real time via an LTE (Long Term Evolution) network,

The measuring apparatus can measure the transmission / reception performance of the apparatus under test according to the V2X communication standard. The measurement apparatus may include a second LTE router that transmits the measured V2X communication performance, the location information of the measurement apparatus, and the travel information of the measurement apparatus in real time via the LTE network.

The central server can be remotely located from the EUT and the measuring apparatus to control the EUT and the measuring apparatus. The central server receives the location information of the EUT, the measured V2X communication performance, the location information of the measuring apparatus, and the running information of the measuring apparatus in real time via the LTE network, Wherein the user interface comprises a traveling screen display unit, a performance item display unit, a driving information display unit, a map display unit, and a graph display unit, the traveling screen display unit real- Wherein the performance item display unit displays the measured V2X communication performance in real time, the travel information display unit displays real-time travel information of the measurement device, and the map display unit displays the position of the measurement device and the EUT And the graph display unit displays, in real time, A V2X communication performance may be represented by a graph.

According to another embodiment of the present invention, the central server includes software and a display module for evaluating the positioning performance of the metering device or the EUT, and the central server executes the software to determine the positioning performance And the central server executes a user interface to expose an evaluation result of the positioning performance through the display module, and the user interface is a location for displaying the accuracy of the position information measured by the measuring apparatus or the EUT An accuracy display unit and the 2D error evaluation result display unit for displaying the accuracy of the displayed position information in a two-dimensional graph.

According to another embodiment of the present invention, the central server includes software and a display module for evaluating the measured V2X communication performance, and the central server executes the software to evaluate the measured V2X communication performance The central server displays a result of the evaluation of the measured V2X communication performance through the display module by executing a user interface and the user interface displays a condition information set for the V2X communication performance evaluation, A standard verification item display unit for displaying a test item for judging standard conformity of the V2X communication performance, a test item detail display display unit for displaying a detailed description of the test item, a verification result display unit for displaying the verification result for each test item, Raw V2X communication performance data and It may include a log display unit for displaying the operating system logs of the central server according to the group of raw data display unit for displaying the results of analysis of the raw data and commercial V2X communication performance evaluation.

According to another embodiment of the present invention, the central server may further include a storage for storing the information displayed on the user interface, which changes according to movement of the measuring device and time, as a simulation video.

According to another embodiment of the present invention, the EUT includes a vehicle terminal supporting the V2X communication standard and a roadside base station supporting the V2X communication standard, And displays the location of the device under test on a map based on a road-based map, a satellite photo-based map, a terrain-based map or a combination of road, satellite and terrain, The V2V communication of the V2V communication or the V2I communication between the roadside base station and the measurement device can be distinguished and the real time can be displayed on the map.

4 is a diagram illustrating a configuration of a chassis for measuring V2X communication performance according to an exemplary embodiment of the present invention.

The chassis consists of interfaces for connecting modular cards with each function. A chassis according to an embodiment of the present invention may correspond to a Keysight PXIe chassis.

According to an embodiment of the present invention, the chassis into which the cards for measuring the V2X communication performance are inserted may refer to the V2X communication performance measuring apparatus itself.

According to an embodiment of the present invention, a chassis for measuring V2X communication performance includes a chassis controller, a VXT (VSA + SG) card, an Attenuator card, an RTK Rover card, a Reference card, an RF Switch card, a WIFI / BT / CAN / RS232 Card and / or a V2X channel card. Here, each card may be named as a module or a part, and a detailed description of each card will be described later.

According to an embodiment of the present invention, Ethernet can be connected to each card of the chassis, and when a problem occurs, SSH connection and debugging can be performed.

According to an embodiment of the present invention, the chassis may be connected to a mouse, a keyboard and / or a display through the interface of the chassis control unit.

Meanwhile, according to an embodiment of the present invention, a vehicle terminal is a device mounted on a vehicle and performing V2X communication, and may have the same meaning as an OBU (On-Board Unit), a DUT (Device Under Test)

According to an embodiment of the present invention, the vehicle terminal may further include an Ethernet interface, a power supply, and / or a power switch. The Ethernet interface can be connected to the Ethernet interface of the chassis control unit. The power supply unit can supply power to the vehicle terminal. The power switch can turn the vehicle terminal on and off.

5 is a diagram illustrating a configuration of a V2X communication performance evaluation system according to another embodiment of the present invention.

The V2X communication performance evaluation system according to another embodiment of the present invention may include an indoor verification device, a mobile verification device (HV), a verification support device (RV), a mobile base station and / or a server (not shown). Here, both the indoor verification device, the mobile verification device, and the verification support device may have the same meaning as the V2X communication performance measurement device.

According to one embodiment of the present invention, the chassis may be equipped with a modular measuring device, and a 10-slot chassis and an 18-slot chassis may be used for the V2X communication performance evaluation system.

The chassis control unit controls the module (card) mounted on the chassis and can manage the overall operation of the tool and the system used in evaluating the communication performance of the system. Here, the chassis control unit may be referred to as a control unit.

VXT can perform both VSG and VSA functions. VXT (Vector Transceiver) has both a Vector Signal Analyzer (VSA) function and a Vector Signal Generator (VSG) function and can test V2X communication performance. VXT can test not only IEEE 802.11p but also wireless products such as CDMA, LTE, WLAN and B / t.

The indoor verification device or the mobile verification device can analyze the performance of the IEEE. 902.11P and measure the performance of the DUT.

The reference frequency generator is a device for inputting an accurate reference frequency to the VXT. The reference frequency generator generates an accurate reference frequency. The reference frequency generator can work with the V2X to help create and analyze waveforms without wobbling in terms of frequency. The reference frequency generator may provide a reference frequency of 10 MHz or 100 MHz to the VSA, VSG, and / or VXT.

An attenuator can be used to attenuate the RF signal. The attenuator can attenuate the signal from 0dB to 101dB.

The RF switch is a device for routing the instrument signal and the signal of the EUT.

A power splitter can be used to separate the instrument signal and the signal of the EUT. The power distributor can equally distribute power to the transmission line so that the signals between the meter and the EUT can be compared and analyzed.

The L2 switch hub is a hub that is used to connect chassis control units, base stations, V2X cards and / or devices under test to Ethernet.

The GNSS emulator can input GNSS signals to a portable verification device (HV) and / or a verification support device (RV) for service verification.

CAN emulator can input CAN data to mobile validation device (HV) and / or verification support device (RV) for service verification.

The signal controller emulator is included in a mobile verification device, and can provide signal control related data to the base station for performance and service verification.

DVR (Digital Video Record) can record the internal image of the mobile verification device, the external front image, and the lane image, and transmit it to the verifier inside the mobile verification device. The image transmitted to the verifier can be used to collect, analyze and / or determine data of the mobile verification device in synchronization with the log and CAN data. The DVR can encode video data transmitted from up to 8 cameras, support H.264 codec, store video when various events occur, set a separate time when stopping the vehicle, Can be transmitted using 3G, LTE, and / or Wibro, and the location of the currently viewed location can be confirmed using the Google map while viewing the image, and the captured image can be stored.

The RTK BaseStation can be used to measure the exact location of a mobile verification device, a verification support device, and / or a mobile base station as a virtual base station (VRS) or a real base station. The RTK BaseStation can generate the Radio Technical Commission for Maritime Services (RTCM) information and send it to the RTK rover. The RTK BaseStation can use the RF module to forward the Radio Technical Commission for Maritime Services (RTCM) information to the chassis with the RTK rover.

RTK (Real-Time Kinematic) The RT-2® (1cm + 1ppm) capability provides the exact location of the device and the RTCM information received from the RTK BaseStation can be used to determine the exact location of the device. have. The RTK rover is a GNSS receiver capable of receiving L bands and can support GPS, GLONASS, QZSS, BeiDou and / or Galileo. The RTK Rover Card can receive RTK related information and transmit it to the chassis control unit.

Portable verification devices include a generator that supplies power to the verifier, a UPS capable of supplying power for more than 10 minutes during a power outage, a heating / cooling system that is idle, an industrial notebook that can be used in a mobile environment, A level jack for leveling the printer, a vehicle shock and level, an air suspension, a mast capable of fixing the vehicle-deployed base station, a PoE for supplying power to the deployed base station or the mobile base station and connecting the Ethernet, A monitor outputting a user interface, a device under test, a verifier and a vehicle inverter for powering an LTE router and / or verification support device for connecting a wireless network between base stations.

The verification support device may include a HumanMachine Interface (HMI) for supporting authentication testing on the verification support device.

The indoor verification device may include a chassis with 18 slots and the mobile verification device may include a chassis with 10 slots.

The V2X OBU / RSE Device Card can measure V2X communication performance. The V2X OBU / RSE Device Card can measure the IEEE 1609.2 / 3/4, SAE J2945 / 1 standard.

The chassis can be equipped with an MCU providing IEEE 1588 standard for time synchronization.

Wi-FI and CAN acquisition CARD can receive Wi-Fi or CAN data and forward it to the chassis controller.

6 is a block diagram of a chassis control unit according to an embodiment of the present invention.

The chassis control unit according to an embodiment of the present invention includes a central processing unit (CPU), a chipset, a RAM, a solid state drive (SSD), a PCIe switch, a trigger bus controller, a GPIB controller, and / or a GbE controller can do. The CPU can handle the operation of each configuration of the chassis control and can be used with the Intel i7-4700EQ quad-coreprocessor. The chipset can integrally control the devices constituting the chassis control unit, and the Mobile Intel QM57Express can be used. The wrap is the main memory of the chassis control unit, and DDR3 1600 RAM can be used. The SSD is an auxiliary memory of the chassis control unit. The PCIe switch is a switch for supplying power to the chassis control unit. The trigger bus controller can control the trigger bus input / output to / from the chassis control unit. The GPIB control unit controls GPIB signals input and output for connection to a personal computer. The GbE control unit is a control unit for connecting the device bit Ethernet.

The chassis control unit may further include a display port and / or a USB port to which the monitor can be connected. The chassis control unit can mount an operating system. The chassis control unit may be mounted on a 10-slot chassis or an 18-slot chassis according to an embodiment of the present invention.

7 is a block diagram of a V2X OBU / RSE device card according to an embodiment of the present invention.

A V2X OBU / RSE device card according to an embodiment of the present invention may be mounted on a chassis to measure V2X communication performance. The V2X OBU / RSE Device Card includes a modem unit 7020 for performing source coding and decoding including an IEEE 802.11 MAC, a control unit 7010 for controlling the same, a data conversion unit 7030 for converting digital data and analog data, Or an RF unit 7040 for processing a radio signal. The V2X OBU / RSE Device Card can be used as a reference device and can be equipped with a service application related to wireless communication between vehicles. The power of this card can be supplied from the chassis. This card may contain a shield cover for the protection of the product and electromagnetic shielding. The V2X OBU / RSE Device Card can be named V2X module.

The modem unit can configure the modem unit using a high-performance FPGA, and can respond to changes in standard specifications and requirements of the client. The modem unit can measure the transmission performance of data using the V2X communication standard. The modem unit can measure the ability of the EUT to transmit data to the V2X OBU / RSE device card. Specifically, the modem unit can measure the spectrum mask (Spectrum Mask), spectral flatness, LO leakage, and EVM of the transmission signal for each data rate. At this time, EVM is a measure of how accurately to make and measure the signal. Then, the modem unit can determine whether the measured test data satisfies the standard reference value and confirm whether or not the measured test data conforms to the target standard. In one embodiment, the modem unit may include a spectrum mask, spectral flatness, LO leackage, and / or EVM of a 4.5 Mbps signal of a BPSK scheme, a 6 Mbps signal of a QPSK scheme, a 18 Mbps signal of a 16-QAM scheme, and a 27 Mbps signal of a 64- The performance of the V2X communication was evaluated and the standard consistency was evaluated by obtaining a value satisfying all of the reference values of the corresponding item of the IEEE 802.11p standard. Furthermore, the modem unit can measure the reception performance of the EUT by the data rate. Experimental examples of reception performance will be described later in the following drawings.

The control unit may include a protection circuit. The control unit applies TVS DIODE corresponding to the breakdown voltage (VBR), dynamic resistance (RDYN), clamp voltage (VCL) and / or capacitance to the IO interface to prevent noise from being applied to the device in case of ESD or SurgeEvent . The control unit can suppress the electromagnetic wave radiation by applying the EMI filter to the power supply and high-speed I / O interface. The controller can transmit and receive high-speed data with the chassis controller using the PCIe Gen 2/3 interface. The control unit can transmit and receive high-speed data with the modem unit using the SRAM interface. The control unit can receive information of the EUT using Ethernet. The control unit can receive positioning information of the V2X OBU / RSE device card using GPS. The control unit is an unterthered dead reckoning (UDR) function using a 3-axis acceleration sensor and a 3-axis gyro sensor.

The data converting unit converts the digital I / Q signal generated by the modem unit into an analog I / Q signal and transmits the converted analog I / Q signal to the RF unit, converts the analog I / Q signal transmitted from the RF unit into a digital I / Q data signal, Can be transmitted.

The RF section can include ShieldCan for improved performance and shielding of electromagnetic waves. The RF unit can convert analog I / Q signals into RF signals and transmit them. The RF unit can convert the received RF signal into an analog I / Q signal and transmit it to the data conversion unit.

8 is a diagram illustrating a measurement result of a reception performance of a V2X OBU / RSE device card according to an embodiment of the present invention.

In one embodiment, the modem portion of the V2X OBU / RSE device card measures the receiving performance of the V2X communication signal of the EUT by modulation scheme and data rate. As a result, it was confirmed that all measured values satisfy the reference value of IEEE 802.11p as shown in the figure.

9 is a diagram illustrating a configuration of an RTK rover card according to an embodiment of the present invention.

The RTK rover card according to an embodiment of the present invention may include an RTK unit 9020 including an RTK rover module and an RF module for transmitting / receiving RTCM and / or a control unit 9010 for controlling the RTK unit. The power of this card can be supplied from the chassis. Here, the RTK rover card may be referred to as an RTK module.

The RF module can receive the RTCM from the VRS and forward the received RTCM to the RTK rover module.

The RTK module supports GPS, GLONASS, QZSS and Beidou, and real-time kinematic (RTK) position measurement with 1cm + 1ppm position accuracy using RTCM received by VRS. This card may contain a shield cover for the protection of the product and electromagnetic shielding.

The control unit may include a protection circuit. The control unit applies TVS DIODE corresponding to the breakdown voltage (VBR), dynamic resistance (RDYN), clamp voltage (VCL) and / or capacitance to the IO interface to prevent noise from being applied to the device in case of ESD or SurgeEvent . The control unit can suppress the electromagnetic wave radiation by applying the EMI filter to the power supply and high-speed I / O interface. The controller can transmit and receive high-speed data with the chassis controller using the PCIe Gen 2/3 interface. The control unit can receive the RTK information using the UART interface and can provide the user interface through the Ethernet.

10 is a diagram illustrating a configuration of a WIFI and CAN acquisition card according to an embodiment of the present invention.

The WIFI and CAN acquisition card according to an embodiment of the present invention includes a WIFI and BT module 10020 for short range wireless information exchange, a CAN interface 10030 for collecting driving information data, and / 0.0 > 10010 < / RTI > The power of this card can be supplied from the chassis. Here, the WIFI and CAN acquisition cards can be named CAN modules.

The WIFI and BT modules can support WIFI IEEE 802.11 a / b / g / n / ac, WIFI 2.4 GHz band 1 to 13 channels, WIFI 5 GHz band 36 to 165 channels, Bluetooth V4.2 and / or antenna 2 port. This module can send and receive data via WIFI and / or BT.

The CAN interface can support the CAN 2.0B protocol, and through this protocol, it is possible to collect driving information data of the vehicle.

The control unit may include a protection circuit. The control unit applies TVS DIODE corresponding to the breakdown voltage (VBR), dynamic resistance (RDYN), clamp voltage (VCL) and / or capacitance to the IO interface to prevent noise from being applied to the device in case of ESD or SurgeEvent . The control unit can suppress the electromagnetic wave radiation by applying the EMI filter to the power supply and high-speed I / O interface. The controller can transmit and receive high-speed data with the chassis controller using the PCIe Gen 2/3 interface. The control unit can transmit and receive WIFI information using the SDIO interface, and can transmit and receive BT information using the UART interface. The control unit can provide a user interface using Ethernet.

11 is a diagram illustrating a configuration of a mobile BS according to an embodiment of the present invention.

The mobile base station according to an exemplary embodiment of the present invention includes a modem for performing source coding and decoding including an IEEE 802.11 MAC and a conversion between digital data and analog data, a controller for controlling the same, a PoE module for connecting a power source and Ethernet, and / And an LTE unit for information transmission / reception.

The modem unit can measure the data transmission performance of the mobile base station using the V2X communication standard. The modem unit can measure the spectral mask, spectral flatness, LO leakage, and EVM of the transmission signal for each data rate. At this time, EVM is a measure of how accurately to make and measure the signal. Then, the modem unit can determine whether the measured test data satisfies the standard reference value and confirm whether or not the measured test data conforms to the target standard. In one embodiment, the modem unit may include a spectrum mask, spectral flatness, LO leackage, and / or EVM of a 4.5 Mbps signal of a BPSK scheme, a 6 Mbps signal of a QPSK scheme, a 18 Mbps signal of a 16-QAM scheme, and a 27 Mbps signal of a 64- The performance of the V2X communication was evaluated and the standard consistency was evaluated by obtaining a value satisfying all of the reference values of the corresponding item of the IEEE 802.11p standard. Further, the modem unit can measure the reception performance of the mobile base station by the data rate. In one embodiment, the modem unit measures the reception performance of the mobile base station V2X communication signal by modulation scheme and data rate. As a result, it was confirmed that all measured values meet the reference value of IEEE 802.11p.

The control unit can connect the Ethernet through the PoE module and receive power from the PoE module. The control unit can transmit and receive data at a high speed with the modem unit via the USB interface, and can receive positioning information of the mobile base station using GPS. The control unit may configure the short-range network using the WIFI module and / or the BT module. The control unit may include a protection circuit. The control unit applies TVS DIODE corresponding to the breakdown voltage (VBR), dynamic resistance (RDYN), clamp voltage (VCL) and / or capacitance to the IO interface to prevent noise from being applied to the device in case of ESD or SurgeEvent . The control unit can suppress the electromagnetic wave radiation by applying the EMI filter to the power supply and high-speed I / O interface.

The LTE department can support the transmission and reception of real-time information between the mobile base station, the verification support device, the indoor verification device, the mobile verification device and the device under test.

The controller can run applications for V2X standard performance evaluation. Through the above application, it is possible to evaluate the conformity of V2X communication standard of IEEE 802.11p to LLC and IEEE 1609.2 / 3/4 standards. This application not only verifies whether the application is developed according to the standard, but it also communicates to the user through the user interface all information about what part is wrong, how the verification procedure is performed and how it is performed, Compliance can be verified and verified.

FIG. 12 is a block diagram illustrating a configuration of an indoor verification apparatus according to an embodiment of the present invention.

The indoor verification apparatus according to an exemplary embodiment of the present invention may include a software configuration and a hardware configuration. The hardware configuration may include a chassis, and the chassis may include remaining hardware configuration. Further, the chassis includes a chassis control unit, which can execute each software configuration as an application. The description of each configuration of the indoor verification apparatus has been described above and the configuration not described above will be described later.

The indoor verification apparatus according to an embodiment of the present invention can be used for each test or evaluation system to be described later.

According to an embodiment of the present invention, the indoor verification apparatus may function differently according to the configuration included therein. For example, since the indoor verification device shown in the figure includes the V2X card, it can be regarded as a V2X communication performance measuring device. That is, the indoor verification device may have a function according to the software in addition to the V2X communication performance measurement function.

13 is a diagram illustrating a configuration of an interoperability test system according to an embodiment of the present invention.

According to an embodiment of the present invention, the interoperability testing system can perform an operation to confirm whether or not each terminal can communicate with each other by using the correct message set in conformity with the standard regardless of the terminal manufacturer. The C-ITS indoor / outdoor integrated verification system chassis shown in the drawing can be referred to as an indoor verification device, a mobile verification device, or a V2X communication performance measurement device. And, the V2X standard validity and message conformance assessment system can be named V2X communication performance evaluation system.

According to one embodiment of the present invention, the items of the interoperability test are as follows.

IOP TC WSM 1 WSM transmission confirmation with version number and Ethertype

IOP TC WSM 2 WSM transmission confirmation with N header containing WAVE Information Element Extensions

IOP TC WSM 3 WSM transmission confirmation with N header without WAVE Information Element Extensions

IOP TC WSM 4 T header, WSM data, and WSM transmission confirmation with different PSID length

IOP TC WSM 5 Verify that the payload does not send a WSM that exceeds WsmMaxLength

IOP TC WSM 6 WSM transmission acknowledgment with defined repetition period on selected channel in continuous operation state

IOP TC WSM 7 Checking the WSM transmission on the selected channel in the alternating operation state

IOP TC BSM 1 Valid BSM security header generation confirmation

IOP TC BSM 2 General BSM transmission / reception test

IOP TC BSM 3 BSM transmission confirmation with vehicle event flag

IOP TC BSM 4 Extension of message number and interim ID test of BSM

IOP TC BSM 5 Data randomization test of BSM

* IOP TC BSM 6 Invalid BSM detection test

IOP TC BSM 7 Test whether the DUT maintains a valid BSM transmission even after receiving an invalid data frame or elements

IOP TC WSA 1 WSM send confirmation with valid WSM header and WSA payload message

IOP TC WSA 2 WSA transmission confirmation including WRA

IOP TC WSA 3 WSA transmission confirmation with valid 1609.2 security header

IOP TC WSA 4 VSA validation of WSA signature

IOP TC WSA 5 Invalid WSA detection confirmation

IOP TC WSA 6 Confirmation of change of contents of WSA

Assignment and change of IPv6 address of IOP TC IP 1 OBU

IOP TC IP 2 Verify IPv6 communication between RSE and OBU using link-local IPv6

IOP TC IP 3 link-global Verify IPv6 communication between RSE and OBU using IPv6

IOP TC SPATMAP 1 SPAT message transmission confirmation

IOP TC SPATMAP 2 MAP message transmission confirmation

IOP TC SPATMAP 3 SPAT message acknowledgment

IOP TC SPATMAP 4 MAP message acknowledgment

According to an embodiment of the present invention, each V2X equipment to be subjected to the interoperability test transmits an Ethernet cable to an L2 switch (indoor / outdoor integration verification system Chassis, indoor verification device) to receive a TCI command from a test system HUB, send a message to each test item according to the TCI command given, or report the result to the test system by TCI to check whether the test is successful or not. At this time, the data transmitted from the DUT is also collected and analyzed through the V2X sniffer included in the test system. The test result is verified by cross-comparing and analyzing the result with the result obtained through TCI, The V2X sniffer will send out a message that matches the test item. In addition, it can be configured to compare the measurement results of the reference DUT with the reference DUT through the measurement using the reference DUT.

The V2X Sniffer included in the indoor verification device sniffs packets of the V2X standard and collects communication logs via Ethernet. The indoor verification device utilizes the on-board device compatibility test evaluation tool to compare and analyze the communication log collected with the TCI result via Ethernet and the sniffed V2X communication log, and verifies the interoperability test item. At this time, the equipment compatibility test evaluation tool may correspond to the application.

According to an embodiment of the present invention, the indoor verification apparatus corresponds to a chassis, and the chassis includes a chassis control section. The chassis control unit is equipped with an OS that manages the system operation and manages the PXIe interface. Create scenarios to test through the Scenario Controller, pass TCI commands on interoperability test items, and control these tests through a GUI application. Also, it can generate and analyze the result report automatically through the application, and help the person in charge to review and approve easily. The chassis control unit can automatically generate and issue a certificate or certificate according to the review and approval of the person in charge.

In the case of existing similar systems, the test has been conducted by testing the communication between the two devices without additional equipment (PlugFest 2017/05) or by analyzing after receiving the packet using the V2X sniffer. However, in this case, the transmission test can be confirmed to some extent, but in the case of the reception test, it is difficult to obtain reliable data and results because it is necessary to confirm the device by directly operating the device under test. In this system, all interoperability tests are standardized by TCI so as to solve these disadvantages, so that it is possible to control the equipment and confirm the results. You can have an advantage.

FIG. 14 is a diagram illustrating a configuration of a basic functional test system according to an embodiment of the present invention.

The basic functional testing system according to an embodiment of the present invention can check the function of the equipment for operation and operation of the service. In addition, it can support the analysis of the operational results of each scenario of the service. The C-ITS indoor / outdoor integrated verification system chassis shown in the drawing can be referred to as an indoor verification device, a mobile verification device, or a V2X communication performance measurement device. And, the V2X standard validity and message conformance assessment system can be named V2X communication performance evaluation system.

According to an embodiment of the present invention, all tests are instructed and reported through a predefined test control interface (TCI). In case of V2X standard validation and basic function test, data is transmitted to DUT and test system (C-ITS indoor / outdoor integrated verification system chassis, indoor verification device) through GNSS emulator and CAN emulator, Condition, and the V2X OBU / RSE device card performs an appropriate operation according to the service, thereby providing an environment on which service and function verification are based. In addition, it can be configured to compare the measurement results of the reference DUT with the reference DUT through the measurement using the reference DUT.

In the case of existing similar systems, testing has been conducted by receiving and analyzing packets using a V2X sniffer. However, in such a case, there is no system that has an integrated test environment for each test. Therefore, it is required to use each device separately according to the test field. Therefore, this system implements a validation tool on the same platform so as to overcome these disadvantages, and the PXIe can be used to change the PXIe card so that it can be freely configured according to the verification system item.

15 is a diagram illustrating a configuration of a V2X standard validity and message conformity assessment system according to an embodiment of the present invention.

The V2X standard validity and message conformance assessment system according to an exemplary embodiment of the present invention can check whether the communication stack conforms to the standards of the communication standard on which the communication standard is based. The standard may include IEEE 802.11p PHY / LLC, IEEE 1609.2 / 3/4, and so on. Message standard conformance evaluation can confirm message standard of standard. For example, the C-ITS service message and the message specification of SAE J2735 and J2945 / 1 can be confirmed. The C-ITS indoor / outdoor integrated verification system chassis shown in the drawing can be referred to as an indoor verification device, a mobile verification device, or a V2X communication performance measurement device. And, the V2X standard validity and message conformance assessment system can be named V2X communication performance evaluation system.

According to an embodiment of the present invention, the message to be subjected to message conformity assessment is as follows.

MSG_BasicSafetyMessage (BSM), BSM is used for various purposes and exchanges safety data related to vehicle status. This message is often broadcast to nearby vehicles that contain data content for safety and other applications. The transmission rate is outside the scope of this standard, but the rate of congestion control is 10 times per second if the rate of decay is not reduced. Part 1 data should be included in all BSMs. Part 2 data items are optional for a given BSM and are required according to policies outside the scope of this standard. Part 2 BSM without optional content is also a valid message.

MSG_ProbeVehicleData (PVD), information about the vehicle is used to exchange status information about the vehicle associated with another (typically RSE) DSRC device to collect information about the general mileage of the vehicle. In addition to the events that caused the collection of the various elements defined in the message, the exchange of this message is also defined elsewhere. Typically, a report vehicle will be used to generate one or more snapshot events, which are limited within a limited time and space range, so some data compression is used in the message to reduce redundant information.

The MSG_SignalPhaseAndTiming Message (SPAT), the Signal Phase and Timing (SPAT) message is used to convey the current state of an intersection where one or more signals are present. The overall geometric layout of this message is described along with the MSG_MapData message. The receiver of this message can determine the state of the signal phase and perform the next expected phase. The SPTA message sends the current operating state of the required visual activation phase (eg the value at which the active state value starts at the earliest, starting at the earliest, starting at the earliest). Normally disabled actions are not transmitted normally. The breadcrumbs are mapped using their own approach, direct entry into the lane and SignalGroupID in the MapData message. The current signal pre-fault and priority status values (current or active) are also transmitted. A more complete summary of pending or preemption events can be found in the signal status messages.

MSG_MapData (MAP), MapData messages are used to convey many types of geographical road information. The current main use is to deliver one or more intersection geometry maps within a single message. Map message content includes complex intersection descriptions, road segment descriptions, high-speed curve contours (used for curved safety messages), and road segments (used in some safety applications). A given MapData message can convey a description of one or more geographic areas or intersections. The contents of this message include defining the details of the indexing system used for other messages (e.g. signal phase and timing via SPAT messages) as events for events in the feature geographic location of the road.

The MSG_TravelerInformationMessage (TIM), Traveler Information Message is used to send various types of information (recommendations and road signs) to the equipment device. It uses a lot of IT IS encoding systems to better understand well-known sentences and patterns to further reduce the number of octets to be transmitted. The displayed message is activated for the correct start and duration, which can be specified in 1 minute resolution. The affected local area can be expressed using one of the systems of the radius system or the short definition area similar to that defined in the MAP message of the road shape.

MSG_RoadSideAlert (RSA), This message is used to alert the traveler to a warning about nearby risks. Unlike many other messages that use the LRMS profile to describe the affected area, this message can be received as it is received by the recipient. In other words, LRMS is not used. This message, which is typically sent over dedicated short distance communication (DSRC) media, provides a simple notification to mobile carriers (both in vehicles and on handheld devices). Typical example messages are expected to be used for mobile risks, construction areas and roadside events, although "leg freeze in front", "approaching train", and "ambulance in operation" are supported here. Or other safety applications. Generally, each receiving device is aware of its own location and heading, but does not need to receive and understand such a message, and does not have a local base map.

MSG_RTCMcorrections (RTCM), RTCM calibration messages encapsulate RTCM differential compensation for GPS and other radio navigation signals as defined in the Radio Commission Committee for Radio Services Committee (RTCM) Special Committee DSRC media and then reconfigured to the final expected form defined can do. It is used directly in various positioning systems in accordance with the RTCM standard to increase the absolute and relative accuracy estimates generated.

In the case of existing similar systems, third-party programs such as 3M, Spirent, and Vector have been developed to analyze the corresponding sniffing packets at the application level by utilizing the Cohda terminal as a V2X sniffer. However, according to one embodiment of the present invention The V2X standard validation equipment allows the V2X sniffer to be analyzed and evaluated at the actual stack level rather than at the higher level because the equipment itself is hardware-based, allowing more accurate and detailed evaluation. It is also easy to apply if future standards are changed or upgraded.

16 is a diagram illustrating a configuration of a mobile verification system according to an embodiment of the present invention.

The mobile verification system according to an embodiment of the present invention includes an integrated solution for indoor / mobile authentication test center vehicle, an integrated solution for mobile authentication test supporting vehicle, and / or a mobile base station. The description of each configuration of the mobile verification system has been described above and the configuration not described above will be described later. Here, an integrated solution for an indoor / mobile authentication test center vehicle and a mobile certification test supporting vehicle can be named as a V2X communication performance measuring device. However, the constitution to be included may vary depending on the embodiment.

It is difficult to confirm whether the performance in the indoor certification test environment satisfies the V2X communication service standard in an environment similar to an actual road, and it is difficult to judge the performance of the device when applied in the actual field. It is also difficult to predict if the site environment is properly configured and there may be situations where the site environment needs to be checked and reviewed before installing the RSE on site. The mobile verification system according to an embodiment of the present invention can determine the V2X communication performance reflecting the field environment.

The mobile verification system according to an embodiment of the present invention can verify the communication performance test, the service performance test, the operation result analysis test and / or the positioning performance test for each service scenario.

17 is a diagram illustrating a configuration of a mobile verification system according to another embodiment of the present invention.

An indoor / mobile authentication test center automotive integrated solution of the mobile verification system according to an embodiment of the present invention corresponds to a chassis, and the chassis includes a chassis control unit. The chassis control unit can collect data by executing a data acquisition and analysis system, a signal controller emulator, a standard security authentication system emulator, and the like. The C-ITS indoor / outdoor integrated verification system chassis shown in the drawing can be referred to as an indoor verification device, a mobile verification device, or a V2X communication performance measurement device. And, the V2X standard validity and message conformance assessment system can be named V2X communication performance evaluation system.

The data collection and analysis system may include an RTK positioning information collection system. The RTK positioning information collection system may include a VRS, a base station, and a rover. The RTK positioning information collection system obtains accurate position information values through the network-based RTK, inputs fixed coordinates to the base station using the obtained values, and the base station generates RTCM messages. The generated RTCM message is forwarded to the rover. The rover can correct its position using the received RTCM message. The reason for including the RTK rover and the base station in spite of the network based RTK is that the server may not be able to use VRS during the authentication test and may have to wait for the connection depending on the situation of the server. Therefore, with the fixed coordinate value alone,

By adding a base station and a rover set that can be measured to have an error within the Specification, it is possible to measure wits alone even in situations where VRS is not available.

The data collection and analysis system may include a CAN information collection system. The CAN information collection system collects information collected from the CAN interfaces of the HV and RVs and transmits the collected information to the chassis control unit. The chassis control unit stores the collected information in synchronization with other information.

The data acquisition and analysis system may include an image acquisition system. The image acquisition system can capture images with 8 cameras, multiplex them into one image, and send the images to the PXIe controller for storage.

The data acquisition and analysis system may include a vehicle terminal application motion collection system. The system can transmit events and transmission / reception logs collected from the V2X sniffer or reference equipment of the vehicle to the chassis control unit and store the collected information in synchronization with other information.

The signal controller emulator is software that can transmit signaling information for generating SPaT messages to the mobile RSE and the overhead deployed RSE via Ethernet. The signal controller emulator can download intersection control information, download intersection situation information, detect information upload, download display information, upload information, download clock and / or clock upload.

The portable verification system according to an exemplary embodiment of the present invention uses a PXIe card to change the configuration of the device as needed, thereby preventing waste of resources in various places due to an unnecessary device. You can also configure your PXIe card to suit your needs, based on a variety of test scenarios and DUT configurations, such as setting up a PXIe V2X card as the base or setting it as a V2X sniffer. In addition, since we designed the overall configuration and functions, not the set consisting of various solutions of different manufacturers, there is no test error or error due to protocol mismatch between the devices, and the background data is exchanged through PXIe Accurate measurement is possible.

The web-based analysis tool can be used to intuitively identify the content and status of the service progress and to check the progress of the test contents and to check whether the normal test scenario works. Web map-based analysis tools can configure the user interface to display the test situation. Test items that can be evaluated through a web map based analysis tool may include PER, maximum effective communication distance, latency and / or data throughput. The Packet Error Rate is a value obtained by dividing the number of erroneously received packets by the total number of received packets. If at least one bit is erroneous, the packet is regarded as erroneous. In the case of wireless communication, it includes data not received. There are two methods of measuring PER according to an embodiment of the present invention. First, there is a method of calculating the total PER from the beginning to the last received packet. This is not suitable for the measurement of the moving vehicle because the actual field environment in which the communication distance continuously changes during the communication in accordance with the movement of the vehicle is not reflected. In addition, the cumulative amount changes depending on the speed of the vehicle, so that the actual total PER can not be obtained. If the vehicle passes slowly within the communication range, the PER measurement results will be better than when the vehicle is passing quickly. Even if the speed of the test vehicle is constantly adjusted, the PER Numbers may fall off slowly, resulting in false collection results. Therefore, this test method is valid only for measurement in the stationary state. For this reason, the PER measurement using the second method is performed. In this method, the sampling rate (amount of sample packet) to be used for estimation is determined and the PER evaluation is performed on the continuous data by the sampling rate. The effective unit of the result is determined by the sampling rate. For example, if the sampling rate is 10, the result is displayed in units of 10% (1/10), and if the sampling rate is 20, the PER analysis is possible in units of 5% (1/20). In the case of the PER for the entire packet reception, it can be used to check the PER in the entire communication possible interval. In the case of the PER for which the sampling rate is applied, the PER can be utilized as the PER for the specific section of the test site. It can be used to determine the PER based on distance. For this reason, the maximum communication distance can be confirmed by applying the PER measurement method using the sampling rate. The maximum effective communication distance means the distance that the communication has succeeded to the farthest among the sections where the PER is less than 10%. The delay time is determined by the network latency of the packet switched network in either unidirectional (the time from receiving the packet to the destination of the packet) or round-trip delay time (unidirectional latency from source to destination and unidirectional latency from destination to source Sum). Round-trip latency is often cited because it can be measured at a single point, and round-trip latency excludes the time the target system spends processing the packet. Many software platforms provide a service called ping to measure round-trip latency, and ping is a popular method because it performs immediate return without processing the packet. Since ping uses the ICMP protocol and is different from the actual communication protocol such as TCP, it is measured by using a WAVE (ITS G5) communication stack to measure the precise delay time of inter-vehicle communication. What matters in V2X communication is the transmission delay in the entire layer. This is because it is directly related to QoS and is a very important performance variable for reliability and quick response of safety service. In addition, it is a matter of course that performance will be influenced in the whole part depending on the H / W configuration, CPU performance, OS, stack implementation efficiency, API or application implementation of the terminal manufacturer. Therefore, the performance verification system designed and implemented in this proposal can measure and evaluate the end to end delay. The data throughput represents the amount of pure data transfer without consideration of data compression.

The C-ITS service function verification tool can verify whether the service functions such as location-based vehicle data collection service and intersection signal violation warning service are performed well.

The information exchange procedure analysis tool can verify all requirements related to information exchange in order to guarantee the required functions and stability realized by 15 services of C-ITS.

The positioning performance measurement tool can measure the positioning performance of the EUT. Positioning performance measurement tools are 2D error, Yaw rate error. It is possible to calculate a lateral positioning error, a longitudinal positioning error, a lateral acceleration error and / or a longitudinal acceleration error. The positioning performance measurement tool can measure GNSS performance. Specifically, we measure the performance of the GNSS module applied to the DUT. NMEA is collected for five items of latitude, longitude, altitude, speed, and direction and compared with the results of RTK, To evaluate the basic positioning performance of the GNSS module mounted on the vehicle. Further, as a measurement method, five items of latitude, longitude, altitude, speed, and direction can be measured, and the difference between measured values of RTK and DUT for each item can be calculated. The calculated value is the error of latitude, longitude, altitude velocity, direction value with respect to time and position. Furthermore, the reliability can be measured through 2D error analysis of the calculated values. The positioning performance measurement tool can measure the service positioning error. Specifically, longitudinal error, lateral error and reliability can be measured by applying the positioning evaluation criteria defined in the C-ITS service standard. The positioning performance measurement tool can measure sensor accuracy. Specifically, the accuracy of directional acceleration, lateral acceleration, and yaw rate can be measured. The calculated value is an error for the item.

18 is a diagram illustrating a configuration of a user interface for evaluating V2X communication performance according to an embodiment of the present invention.

According to one embodiment of the present invention, the user interface for evaluating the V2X communication performance includes a function menu, a running screen streaming, a 2D error evaluation result, a performance evaluation result graph, a real time information by item, a web- DUT information. Here, each configuration of the user interface may be named as follows. A display screen of a traveling screen, a 2D error evaluation result display unit, a graph display unit (performance item display unit and position accuracy display unit), a map display unit and / or a travel information display unit.

The function may include a load database item, a save database item, a save log item, a preference setting item, a simulation start item, an evaluation test information item, an evaluation start item, a report output item, and / or a program information item. The load database item or the simulation start item can invoke and execute the simulation video (evaluation result) stored in the database. At this time, the V2X performance evaluation system can analyze the past evaluation test using the stored database. When the simulation is started, the position of the equipment (vehicle terminal and / or base station) and / or the measuring device used in the test is displayed as a marker on the map display section and the test data value of the evaluation item set in the evaluation result graph display section is displayed as a graph And values corresponding to the respective configurations can be displayed in the travel information display section, the performance item display section, and / or the position accuracy display section. The save database item can store the data currently being evaluated in the database. The save log entry can store the log that occurred during the performance evaluation. The preference setting item may include a configuration of a user interface and may include a general setting item, a streaming setting item, a map setting item, a graph setting item, a monitor setting item and / or an evaluation requirement setting item, The description will be given later. The simulation start item can execute the simulation video loaded from the database. The evaluation test information item can be stored in the database by inputting information about the evaluation test, and a detailed description thereof will be described later. The evaluation start item can start evaluation. The report output item can output the evaluation result as a report. The program information item can output information about the evaluation program.

The traveling screen display unit can receive the traveling image input through the camera of the vehicle equipped with the vehicle terminal by streaming and output the received traveling image.

The 2D error evaluation result display unit can display the accuracy of the position information of the measuring apparatus or the EUT in a two-dimensional graph.

The performance item display section can display performance items (test items). The test items may include PER, maximum effective communication distance, latency and / or data throughput.

The travel information display unit can display GPS information of the vehicle terminal or the base station. The GPS information may include information such as latitude, longitude, altitude, speed, direction, yaw rate, and the like.

The position accuracy display unit can display the accuracy of the position information measured by the measuring apparatus or the EUT.

The map display section can display the position of the vehicle terminal, the measurement apparatus and / or the base station on the map. The map display can use Google Maps and display hybrid, road, satellite and / or terrain maps supported by Google Maps.

The graph display unit can generate and display a graph in real time according to the set input and output information. At this time, the information to be displayed can be determined by inputting the X axis value, Y1 axis value and / or Y2 axis value on the right side of the graph.

According to an embodiment of the present invention, the size of each configuration of the user interface is adjustable through a mouse.

19 is a diagram illustrating the configuration of an evaluation test information item of a user interface according to an embodiment of the present invention.

According to one embodiment of the present invention, the evaluation test information item is inputted with the evaluation test ID, the manager name, the name of the target institution of the evaluation test, the sampling rate, the date of the evaluation test, the name of the evaluation test, the name of the observer, And the input information can be output to a later report.

20 is a diagram illustrating a configuration of a general setting item of a user interface according to an embodiment of the present invention.

According to one embodiment of the present invention, the controller of the server can receive the preference setting in accordance with the evaluation test before starting the evaluation test. The general setting item among the preference setting items includes a GUI setting item for receiving a configuration to be displayed on the user interface, an IP address, a port number, and / or a stream port number of the server, the vehicle terminal, the base station and / A font setting unit capable of receiving a character font of a user interface, and / or a log setting unit capable of receiving a step of a log.

21 is a diagram illustrating a configuration of a streaming setting item of a user interface according to an embodiment of the present invention.

According to an embodiment of the present invention, the control unit of the server can set the content of the image to be displayed on the driving screen display unit of the user interface through the streaming setting item among the preference setting items. The streaming setting item is configured to receive the frame rate of the streaming video, the codec of the video and / or the storage location of the video.

22 is a diagram illustrating a configuration of a map setting item of a user interface according to an embodiment of the present invention.

According to an embodiment of the present invention, the controller of the server can set contents of the map to be displayed on the map display unit of the user interface through the map setting item. The map setting items may include a configuration indicating a type of a map (hybrid, satellite based, road based, terrain based, etc.), a configuration indicating a value to be displayed on the map, and / or a configuration indicating a size of the map.

23 is a diagram illustrating a configuration of a graph setting item of a user interface according to an embodiment of the present invention.

According to an embodiment of the present invention, the control unit of the server can set contents of the graph to be displayed on the evaluation result graph display unit of the user interface through the graph setting item. The graph setting items may include a configuration indicating the upper and lower evaluation reference upper and lower limits of the test data values displayed on the graph and / or a configuration indicating the hue in which the test data values are displayed.

24 is a diagram illustrating a configuration of a monitor setting item of a user interface according to an embodiment of the present invention.

According to an embodiment of the present invention, the controller of the server can set contents to be displayed on the performance item display unit and the travel information accuracy display unit of the user interface through the monitor setting item. The monitor setting item may include a configuration indicating the upper limit value and the lower limit evaluation standard of the test data and the GPS information displayed on the performance item display unit and the running information accuracy display unit, and / or a configuration showing the test data and the hue in which the GPS information is displayed.

25 is a diagram showing a configuration of an evaluation requirement setting item of a user interface according to an embodiment of the present invention.

According to an embodiment of the present invention, the control unit of the server can set the reference value of each evaluation item for evaluating the evaluation items through the evaluation requirement setting item. The evaluation requirement setting items include a configuration indicating the reference value of the RSSI, a configuration indicating the reference value of the PER, a configuration indicating the reference value of the latency, a configuration indicating the communication distance value of PER 10% or less, a configuration indicating the reference value of the throughput, / RTI > and / or alternatively a reference value of a channel that is accessible.

26 is a diagram showing a configuration of a user interface showing the evaluation result of V2X communication performance according to an embodiment of the present invention.

The user interface showing the evaluation result of the V2X communication performance according to an embodiment of the present invention includes a test setting information display unit for displaying condition information set for the V2X communication performance evaluation, a test item for determining the standard conformity of the V2X communication performance A verification result display unit for displaying a detailed description of the test item, a verification result display unit for displaying the verification result for each test item, a verification result display unit for displaying the measured V2X communication performance raw data and the raw data A raw data display unit for displaying the analysis result, and a log display unit for displaying the system operation log of the central server according to the evaluation of the commercial value of the V2X communication.

1010: V2X communication performance evaluation system, 1020: device under test, 1030: measuring device, 1040: central server
2010: V2X communication performance measuring apparatus, 2020: V2X module, 2030: RTK module, 2040: CAN module, 2050: LTE router, 2060:
3010: V2X communication performance evaluation system, 3020: Tested device, 3030: Measuring device, 3040: Central server, 3050: User interface
7010: control section, 7020: modem section, 7030: data conversion section, 7040: RF section
9010: control unit, 9020: RTK unit
10010: Control section, 10020: WIFI / BT section, 10030: CAN interface

Claims (5)

V2X (Vehicle to Everything) communication standard,
The apparatus includes an RF (Radio Frequency) module for transmitting and receiving data according to the V2X communication standard, a first RTK module for measuring a position of the EUT using information of Radio Technical Commission for Maritime Services (RTCM) And a first LTE router for transmitting the measured location information of the EUT in real time via an LTE (Long Term Evolution) network;
A measuring device for measuring a transmission / reception performance according to the V2X communication standard of the device under test,
The measuring device includes a V2X module for measuring the transmission / reception performance according to the V2X communication standard of the EUT, a second RTK module for measuring the position of the measuring device using the RTCM information, A CAN module for collecting information and a second LTE router for transmitting the measured V2X communication performance, the position information of the measured measurement device, and the travel information of the collected measurement device in real time via an LTE network; And
A central server located remotely from the DUT and the measuring apparatus and controlling the DUT and the measuring apparatus,
The central server receives the location information of the EUT, the measured V2X communication performance, the location information of the measuring apparatus, and the running information of the measuring apparatus in real time via the LTE network, To evaluate the V2X communication performance;
Wherein the V2X communication performance evaluation system comprises: The method according to claim 1,
Wherein the EUT comprises a vehicle terminal supporting the V2X communication standard and a roadside base station supporting the V2X communication standard,
The vehicle terminal is mounted on a test vehicle, and the measurement device is mounted on a measurement vehicle that runs on a measurement site, and measures transmission and reception performance according to the V2X communication standard directly on site. The method according to claim 1,
Wherein the central server comprises software and a display module for evaluating the measured V2X communication performance,
Wherein the central server evaluates the received V2X communication performance by executing the software and the central server executes a user interface to display the evaluation result of the V2X communication performance through the display module,
Wherein the central server executes a V2X communication performance evaluation system that realizes the location information of the EUT, the V2X communication performance, the location information of the measuring apparatus, and the traveling information of the measuring apparatus, . The method according to claim 1,
Wherein the measuring apparatus further comprises a controller and a display module for controlling operations of the V2X module, the second RTK module, the CAN module, and the second LTE router,
The control unit accesses the central server using an installed operating system, executes software installed in the central server, evaluates the measured V2X communication performance directly in the field,
Wherein the control unit executes a user interface installed in the central server to display the evaluation result of the V2X communication performance through the display module. The method according to claim 1,
The V2X communication performance evaluation system may include a plurality of devices under test, and the measurement device simultaneously measures the V2X communication performance of the plurality of devices under test.

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