Method, device and electronic device for testing coverage of roadside unit equipment

Abstract

The present invention provides a method, device and electronic device for testing the coverage of a roadside unit device, and relates to the field of vehicle networking technology. The method includes: receiving roadside traffic event information broadcast by a roadside unit device based on a preset broadcast rhythm during vehicle driving; outputting recording point information of one or more recording points at each first time interval, each recording point information including the longitude and latitude of the vehicle-mounted unit device at the end of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the recording point information is used to determine whether the recording point is a valid coverage point or an invalid coverage point of a roadside unit device with a different unique identifier. This solves the problem in the prior art that measuring the coverage of RSU equipment requires a lot of measurement time and statistical manpower, and it is difficult to accurately and effectively evaluate the coverage.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of vehicle networking technology, and in particular to a method, device and electronic equipment for testing the coverage of a roadside unit device. Background Art

[0002] In the prior art, V2X (Vehicle To Anything, vehicle-to-external information exchange) service is the most important link in vehicle-road collaboration and autonomous driving. In this service, the RSU (Road Side Unit) device on the roadside broadcasts real-time road condition information to the OBU (On board Unit) carried by the moving vehicle to help the vehicle realize traffic warning and auxiliary / autonomous driving functions. This broadcast function is realized based on the direct communication technology of the 3GPP LTE protocol, namely LTE-CV2X direct communication technology. When the RSU device is working, the coverage range of the signal broadcast in all directions will vary due to the obstruction and reflection of objects such as buildings and trees. Therefore, when deploying the RSU device, it is necessary to measure its coverage range on key sections in order to set a reasonable deployment spacing. The existing measurement method determines the signal coverage range of the RSU by collecting the broadcast message of a certain RSU at several fixed points and determining the packet loss rate. This method consumes a lot of measurement time and statistical manpower, and it is also difficult to accurately and effectively evaluate the coverage range by measuring several isolated points. Summary of the invention

[0003] The present invention provides a method, device and electronic device for testing the coverage of a roadside unit device, so as to solve the problem in the prior art that measuring the coverage of an RSU device requires a lot of measurement time and statistical manpower, and it is difficult to accurately and effectively evaluate the coverage.

[0004] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0005] In a first aspect, the present invention provides a method for testing the coverage of a roadside unit device, which is applied to an on-board unit device of a vehicle, and the method comprises:

[0006] During the driving process of the vehicle, receiving the roadside traffic event information broadcasted by the roadside unit equipment based on the preset broadcast rhythm;

[0007] The recording point information of one or more recording points is output every first time interval, and each of the recording point information includes the longitude and latitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding to it; the recording point information is used to determine whether the recording point is a valid coverage point or an invalid coverage point of a roadside unit device with a different unique identifier.

[0008] Optionally, the on-board unit device is provided with a GNSS module for outputting a message containing the latitude and longitude of the on-board unit device.

[0009] Optionally, if the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the recording point information is also used to determine the target roadside unit equipment based on the unique identifier, and determine that the recording point is a valid coverage point or an invalid coverage point of the target roadside unit equipment.

[0010] In a second aspect, the present invention further provides a method for testing the coverage of a roadside unit device, which is applied to an electronic device, comprising:

[0011] Receiving recording point information of recording points output by a vehicle-mounted unit device, the recording point information of each recording point including the latitude and longitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the vehicle-mounted unit device is arranged on a moving vehicle;

[0012] According to different unique identifiers and the number of roadside traffic event information pieces corresponding thereto, it is determined that the recording point is a valid coverage point or an invalid coverage point of different roadside unit devices.

[0013] Optionally, the determining, based on different unique identifiers and the number of roadside traffic event information corresponding thereto, that the recording point is a valid coverage point or an invalid coverage point of different roadside unit devices further includes:

[0014] When the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the target roadside unit equipment is determined based on the unique identifier, and the longitude and latitude coordinates of the recording point are displayed on the map as valid coverage points of the target roadside unit equipment; otherwise, the longitude and latitude coordinates of the recording point are displayed on the map as invalid coverage points of the target roadside unit equipment.

[0015] In a third aspect, the present invention provides a device for testing the coverage of a roadside unit device, comprising:

[0016] A first receiving module is used to receive roadside traffic event information broadcasted by a roadside unit device based on a preset broadcast rhythm during the driving process of the vehicle;

[0017] A statistical module is used to output the recording point information of one or more recording points every first time interval, each of the recording point information includes the longitude and latitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding to it; the recording point information is used to determine whether the recording point is a valid coverage point or an invalid coverage point of a roadside unit device with a different unique identifier.

[0018] In a fourth aspect, the present invention provides an electronic device, comprising:

[0019] A second receiving module is used to receive the recording point information of the recording point output by the vehicle-mounted unit device, wherein the recording point information of each recording point includes the latitude and longitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the vehicle-mounted unit device is arranged on a moving vehicle;

[0020] The determination module is used to determine whether the recording point is a valid coverage point or an invalid coverage point of different roadside unit devices based on different unique identifiers and the number of roadside traffic event information corresponding thereto.

[0021] Optionally, the determination module is also used to determine the target roadside unit equipment based on the unique identifier when the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, and display the longitude and latitude coordinates of the recording point on the map as a valid coverage point of the target roadside unit equipment; otherwise, display the longitude and latitude coordinates of the recording point on the map as an invalid coverage point of the target roadside unit equipment.

[0022] In a fifth aspect, the present invention provides an electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the steps in the method for testing the coverage range of a roadside unit device as described in either the first aspect or the second aspect are implemented.

[0023] In a sixth aspect, the present invention provides a readable storage medium having a program stored thereon, which, when executed by a processor, implements the steps in the method for testing the coverage range of a roadside unit device as described in either the first aspect or the second aspect.

[0024] In the present invention, the unique identifiers of the roadside unit devices on both sides of the driving road and the number of roadside traffic time information corresponding to them and the longitude and latitude of the vehicle-mounted devices at different times that are regularly received by the vehicle-mounted device unit set on the driving vehicle can calculate the packet loss rate of the roadside unit devices with different unique identifiers on a certain road section or a block of the road network, and determine the recording points as the effective coverage points and invalid coverage points of different roadside unit devices; the data of an entire block can be collected at one time, classified and summarized, and the coverage of multiple roadside unit devices can be analyzed at one time, so as to efficiently and accurately realize the coverage test of the roadside unit devices, improve the test efficiency, and save statistical manpower. This method is also more advantageous in analyzing the signal coverage of complex urban roads and planning the installation points of roadside unit devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0026] Figure 1 One of the flowcharts of a method for testing the coverage of a roadside unit device provided by an embodiment of the present invention;

[0027] Figure 2 A second flow chart of a method for testing the coverage of a roadside unit device provided in an embodiment of the present invention;

[0028] Figure 3 One of the structural schematic diagrams of a device for testing the coverage of a roadside unit device provided in an embodiment of the present invention;

[0029] Figure 4 One of the structural schematic diagrams of an electronic device provided by an embodiment of the present invention;

[0030] Figure 5 A second structural diagram of an electronic device provided by an embodiment of the present invention;

[0031] Figure 6 A third flowchart of a method for testing the coverage of a roadside unit device provided by an embodiment of the present invention;

[0032] Figure 7 A fourth flowchart of a method for testing the coverage of a roadside unit device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The road side unit (RSU) is installed on the road side and uses DSRC (Dedicated Short Range Communication) technology or CV2X (Cellular Vehicle-to-Everything) technology to communicate with the on-board unit (OBU) to broadcast road side information and traffic light information.

[0035] Road Side Information (RSI) is traffic event and traffic sign information released by the roadside unit to the surrounding vehicle-mounted unit devices.

[0036] The GNSS (Global Navigation Satellite System) module covers multiple satellite navigation systems such as GPS, GLONASS, and COMPASS. By measuring the distance between a satellite with a known position and the GNSS module and integrating the data from multiple satellites, the detailed location of the receiver can be known. With the support of electronic map information, it can provide mobile users with location information of people / objects. It can also realize route navigation by moving from one place to another based on the location information provided by the GNSS module.

[0037] Please refer to Figure 1 , Figure 1 One of the flow charts of a method for testing the coverage of a roadside unit device provided in an embodiment of the present invention; the method for testing the coverage of a roadside unit device is applied to an on-board unit device of a vehicle, and the method includes:

[0038] Step 11: During the driving process of the vehicle, receiving the roadside traffic event information broadcasted by the roadside unit equipment based on a preset broadcast rhythm;

[0039] Step 12: Output the recording point information of one or more recording points every first time interval, each recording point information includes the longitude and latitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifiers of all the roadside unit devices received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the recording point information is used to determine whether the recording point is a valid coverage point or an invalid coverage point of the roadside unit device with a different unique identifier.

[0040] In the present invention, the unique identifiers of the roadside unit devices on both sides of the driving road and the number of roadside traffic time information corresponding to them and the longitude and latitude of the vehicle-mounted devices at different times that are regularly received by the vehicle-mounted device unit set on the driving vehicle can calculate the packet loss rate of the roadside unit devices with different unique identifiers on a certain road section or a block of the road network, and determine the recording points as the effective coverage points and invalid coverage points of different roadside unit devices; the data of an entire block can be collected at one time, classified and summarized, and the coverage of multiple roadside unit devices can be analyzed at one time, so as to efficiently and accurately realize the coverage test of the roadside unit devices, improve the test efficiency, and save statistical manpower. This method is also more advantageous in analyzing the signal coverage of complex urban roads and planning the installation points of roadside unit devices.

[0041] In some embodiments of the present invention, optionally, the on-board unit device is provided with a GNSS module for outputting a message containing the latitude and longitude of the on-board unit device.

[0042] In the embodiment of the present invention, the on-board unit device outputs the longitude and latitude of the on-board unit device quickly and accurately by carrying a GNSS module.

[0043] Specifically, the GNSS module provided in the vehicle-mounted device will periodically output at least one NMEA format message, which at least includes GPRMC data, and the GPRMC data includes the latitude and longitude of the vehicle-mounted unit device at the current moment, and the message will also be saved in the log file log of the vehicle-mounted unit device. The OBU device achieves time calibration with an accuracy of within 1 millisecond through the 1PPS second pulse of the internal GNSS module.

[0044] In some embodiments of the present invention, optionally, the roadside unit device broadcasts roadside traffic event information from the PC5 air interface based on a preset rhythm, and the roadside traffic event information carries a unique identifier of the roadside unit device (maximum length 8 bytes).

[0045] In some embodiments of the present invention, optionally, if the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the recording point information is also used to determine the target roadside unit device based on the unique identifier, and determine that the recording point is a valid coverage point or an invalid coverage point of the target roadside unit device. In an embodiment of the present invention, if the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the target roadside unit device can be determined based on the unique identifier, and the packet loss rate of the target roadside unit device on a road network of a certain section or a block can be calculated in combination with the longitude and latitude of the vehicle-mounted device at different times, and the valid coverage point and invalid coverage point of the target roadside unit device can be determined, so that the coverage range test of the target roadside unit device is realized efficiently and more accurately, the test efficiency and test accuracy are improved, and statistical manpower is saved. This method receives the recording point information of multiple roadside unit devices at one time, and the user can filter the target roadside unit device and calculate its coverage range according to his own needs. It is also more advantageous for analyzing the signal coverage range of complex urban roads and planning the installation points of roadside unit devices.

[0046] In some embodiments of the present invention, optionally, when the target roadside unit device is one (first roadside unit device), the unique identifier in the received roadside traffic event information is the same as the unique identifier preset by the target roadside unit device (first roadside unit device), and at this time, the recording point information of a recording point is output every first time interval to determine whether the recording point is a valid coverage point or an invalid coverage point of the target roadside unit device (first roadside unit device).

[0047] In some embodiments of the present invention, optionally, when there are multiple target roadside unit devices (i.e., part or all of all roadside unit devices), based on the unique identifiers of the multiple target roadside unit devices, the number of roadside traffic event information items corresponding to each target roadside unit device is filtered out from the roadside traffic event information sent by all roadside unit devices in the recording point information that outputs a recording point every first time interval, and the recording points are determined to be valid coverage points or invalid coverage points of the corresponding target roadside unit devices (part or all of all roadside unit devices) based on the corresponding number of roadside traffic event information items of different target roadside unit devices.

[0048] Furthermore, each roadside unit device has a different unique identifier, and the recording point information of the recording point can be used to determine that the recording points are valid coverage points or invalid coverage points of the roadside unit devices with different unique identifiers. The valid coverage points or invalid coverage points of different roadside unit devices can also be marked with different marks (including but not limited to marking with different shapes and colors) and displayed on the map.

[0049] In some embodiments of the present invention, optionally, the calculation formula of the packet loss rate of the recording point is:

[0050] 1-(the number of roadside traffic event information items received from the target roadside unit device within the first time interval) / (the broadcast rhythm of the target roadside unit device*the first time interval).

[0051] In an embodiment of the present invention, a statistical method of packet loss rate combined with GNSS coordinate points is used to test the coverage range of the roadside unit equipment instead of signal quality and signal strength. The statistics are relatively simple, and there is no need for a CV2X (Cellular Vehicle-to-Everything, i.e., V2X technology based on cellular communication technology) module to support the collection of signal quality and signal strength, nor is there a need for the roadside unit equipment or the vehicle-mounted unit equipment to add additional statistical function development.

[0052] In some embodiments of the present invention, optionally, if it is necessary to improve the statistical accuracy of the coverage range of the roadside unit equipment, the broadcast rhythm of the roadside unit equipment in broadcasting roadside traffic event information can be increased while the test vehicle speed remains unchanged, and the first time interval for the recording point to output the recording point information can be shortened.

[0053] In some embodiments of the present invention, optionally, when the sampling interval (ie, the first time interval) is set to 5 seconds, 50 RSI messages can be received under normal circumstances, so that the statistical accuracy of the packet loss rate can be controlled at 2%.

[0054] In some embodiments of the present invention, optionally, to ensure that the coverage accuracy of the roadside unit equipment is no more than 50 meters, a vehicle equipped with an OBU device travels through the section to be tested at a speed not exceeding 36 km / h, and can complete all the sections to be tested at one time.

[0055] In some embodiments of the present invention, optionally, in order to further optimize the test results of the coverage range of the target roadside unit equipment, vehicles with the same or different parameters can be set to travel multiple times on the same road equipped with the same target roadside unit equipment, and multiple data can be obtained for processing to optimize the test results of the coverage range of the target roadside unit equipment.

[0056] In some embodiments of the present invention, optionally, after the recording point information of the recording point is output, the recording point information can be processed and displayed according to needs in a variety of ways (including but not limited to different marking shapes and colors) to determine the coverage of the target roadside unit equipment.

[0057] In some embodiments of the present invention, optionally, when the RSU device to be tested (target roadside unit device) set up at the intersection broadcasts RSI messages from the PC5 air interface at a rhythm of 10Hz, the test vehicle traveling on the road is equipped with an OBU device for receiving RSI messages. When the OBU device receives the PC5 broadcast message, it will determine whether the message is an RSI message, and whether the parsed ID matches the ID of the RSU to be tested. If it matches, a timestamp of receiving the message (including year, month, day, hour, minute, and second information, accurate to milliseconds) is output on the device log. The GNSS module of the OBU device is configured to output at least one NMEA format message every 5 seconds (assuming that the first time interval is set to 5 seconds), and the message contains at least GPRMC data, which is also saved in the device log.

[0058] In some embodiments of the present invention, optionally, after the recording point information is output, the RSI message can also be associated with the NMEA message corresponding to the time period according to the timestamp, and whether the corresponding position is a valid coverage point can be determined by judging whether the number of RSI messages corresponding to each NMEA message exceeds a threshold (assuming that the first threshold is set to 45).

[0059] Specifically, see Table 1. By using software such as UltraEdit, two sets of data are extracted from the log of the OBU device: one set is the timestamp of receiving the RSI message, and the other set is the 5-second interval timestamp extracted from the GPRMC message and the latitude and longitude at that time (the starting point of the timestamp is the first 5-second interval timestamp after receiving the first RSI message, and the end point of the timestamp is the first 5-second interval timestamp after receiving the last RSI message). The two sets of data are arranged in the order of the time when the RSI message is received in an Excel table, and the FREQUENCY formula of Excel is used to calculate the number of messages received in each 5-second interval, and placed in the LABEL column. At the same time, a judgment column for whether it is effectively covered is added, and it is set that more than or equal to 45 messages are judged as effective coverage.

[0060] Table 1: List of data to be processed

[0061]

[0062] The effective coverage data and the ineffective coverage data can be exported into two csv files respectively (as shown in Table 2 and Table 3 below).

[0063] Table 2: List of effective coverage data

[0064] LONGITUDE LABEL 122°0’40.988”E 48 122°0’37.847”E 45 122°0’24.166”E 49 122°0’21.793”E 50 122°0’19.458”E 49 122°0’17.169”E 45 122°0’14.878”E 49 122°0’12.652”E 48 122°0’10.532”E 49

[0065] Table 3: List of invalid coverage data

[0066]

[0067]

[0068] See also Figure 6 , Figure 6 The third flowchart of a method for testing the coverage of a roadside unit provided in an embodiment of the present invention; import the above two csv file data into Global Mapper, and mark the valid coverage points as diamonds, and the invalid coverage points as circles. The recording points of the same longitude and latitude can correspond to the recording point information of one or more target roadside unit devices, and the recording point information of different target roadside unit devices can be displayed separately and on the same map. In this embodiment, Figure 6 611 is a hollow diamond representing a valid coverage point of the first target roadside unit device, and 612 is a hollow circle representing an invalid coverage point of the first target roadside unit device; 621 is a shaded diamond representing a valid coverage point of the second target roadside unit device, and 622 is a shaded circle representing an invalid coverage point of the second target roadside unit device. Figure 6 A method is provided for displaying recorded point information of different target roadside unit devices on the same picture, wherein the longitude and latitude of recorded points of the first target roadside unit device and the second target roadside unit device in the same time interval are the same or approximately the same.

[0069] See also Figure 7 , Figure 7 The fourth flowchart of a method for testing the coverage of a roadside unit provided in an embodiment of the present invention; finally, the two csv files are exported as kmz files, and the coverage distribution map of the roadside unit to be tested on the actual street can be previewed on the Google Earth map. In this embodiment, Figure 7 711 is a hollow diamond, indicating that the first target roadside unit device marks each recorded point as a valid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point; 712 is a hollow circle, indicating that the first target roadside unit device marks each recorded point as an invalid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point; 721 is a shaded diamond, indicating that the second target roadside unit device marks each recorded point as a valid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point; 722 is a shaded circle, indicating that the second target roadside unit device marks each recorded point as an invalid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point. Figure 7 A method is provided for displaying coverage areas of different target roadside unit devices on the same picture, wherein the longitude and latitude of points recorded by the first target roadside unit device and the second target roadside unit device in the same time interval are the same or approximately the same.

[0070] In some embodiments of the present invention, optionally, Figure 6The diamond 611 can also be represented as the effective coverage point of the third target roadside unit device, and the circle 612 can be represented as the effective coverage point of the fourth target roadside unit device.

[0071] In some embodiments of the present invention, optionally, Figure 7 The diamond 711 in the figure can also indicate that according to the longitude and latitude coordinates of each recorded point, this point is an effective coverage point of the third target roadside unit equipment on the actual street. The circle 712 indicates that according to the longitude and latitude coordinates of each recorded point, this point is an effective coverage point of the fourth target roadside unit equipment on the actual street.

[0072] In addition, it can also be completed by adding automated collection judgment logic on the OBU device side. For example, set the current latitude and longitude to be printed every 5 seconds and the number of RSI messages received in the previous 5 seconds as a record point, write the record points greater than or equal to 45 in the covered.csv file, and write the record points less than 45 in the uncovered.csv file, and then directly obtain the coverage of the RSU device. After obtaining the coverage, the results can be visualized on the map.

[0073] Please refer to Figure 2 , Figure 2 A second flow chart of a method for testing the coverage of a roadside unit device provided in an embodiment of the present invention; the method for testing the coverage of a roadside unit device is applied to an electronic device, comprising:

[0074] Step 21: receiving the recording point information of the recording point output by the vehicle-mounted unit device, wherein the recording point information of each recording point includes the latitude and longitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifiers of all roadside unit devices received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the vehicle-mounted unit device is set on a moving vehicle;

[0075] Step 22: Determine whether the recording point is a valid coverage point or invalid coverage point of different roadside unit devices according to different unique identifiers and the number of roadside traffic event information corresponding thereto. In an embodiment of the present invention, the vehicle-mounted unit device is arranged on a moving vehicle, and the electronic device receives the recording point information of the recording point output by the vehicle-mounted unit device, and the recording point information of each recording point includes the latitude and longitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifiers of all roadside unit devices received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto. According to the different unique identifiers and the number of roadside traffic event information corresponding thereto, the recording point can be determined to be a valid coverage point or invalid coverage point of different roadside unit devices. By using the existing data analysis tools, the analysis results can be obtained quickly, without setting up a special data analysis server to collect statistical measurement results, and the coverage display of the roadside unit device is realized quickly, intuitively and accurately, thereby improving the test efficiency and saving statistical manpower. When the recording point information includes multiple roadside unit devices, the coverage of multiple roadside unit devices can be analyzed and displayed at one time, and the coverage test of the roadside unit devices is realized efficiently and accurately, thereby improving the test efficiency.

[0076] In some embodiments of the present invention, optionally, the on-board unit device is provided with a GNSS module for outputting a message containing the latitude and longitude of the on-board unit device.

[0077] In the embodiment of the present invention, the on-board unit device outputs the longitude and latitude of the on-board unit device quickly and accurately by carrying a GNSS module.

[0078] Specifically, the GNSS module provided in the vehicle-mounted device will periodically output at least one NMEA format message, which at least includes GPRMC data, and the GPRMC data includes the latitude and longitude of the vehicle-mounted unit device at the current moment, and the message will also be saved in the log file log of the vehicle-mounted unit device. The OBU device achieves time calibration with an accuracy of within 1 millisecond through the 1PPS second pulse of the internal GNSS module.

[0079] In some embodiments of the present invention, optionally, the roadside unit device broadcasts roadside traffic event information from the PC5 air interface based on a preset rhythm, and the roadside traffic event information carries a unique identifier of the roadside unit device (maximum length 8 bytes).

[0080] In some embodiments of the present invention, optionally, determining the recording point as a valid coverage point or an invalid coverage point of different roadside unit devices based on different unique identifiers and the number of roadside traffic event information corresponding thereto further includes:

[0081] When the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the target roadside unit device is determined based on the unique identifier, and the longitude and latitude coordinates of the recording point are displayed on the map as the valid coverage point of the target roadside unit device; otherwise, the longitude and latitude coordinates of the recording point are displayed on the map as the invalid coverage point of the target roadside unit device. In an embodiment of the present invention, when the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the target roadside unit device is determined based on the unique identifier, and the longitude and latitude coordinates of the recording point are displayed on the map as the valid coverage point of the target roadside unit device; otherwise, the longitude and latitude coordinates of the recording point are displayed on the map as the invalid coverage point of the target roadside unit device. The coverage range test of each roadside unit device is realized efficiently and more accurately, the test efficiency and test accuracy are improved, and statistical manpower is saved. This method can analyze and display the coverage range of multiple roadside unit devices at one time, and is also more advantageous for analyzing the signal coverage range of complex urban roads and planning the installation points of roadside unit devices.

[0082] In some embodiments of the present invention, optionally, when the target roadside unit device is one (first roadside unit device), the unique identifier in the received roadside traffic event information is the same as the unique identifier preset by the target roadside unit device (first roadside unit device), and at this time, the recording point information of a recording point is output every first time interval to determine whether the recording point is a valid coverage point or an invalid coverage point of the target roadside unit device (first roadside unit device).

[0083] In some embodiments of the present invention, optionally, when there are multiple target roadside unit devices (i.e., part or all of all roadside unit devices), based on the unique identifiers of the multiple target roadside unit devices, the number of roadside traffic event information items corresponding to each target roadside unit device is filtered out from the roadside traffic event information sent by all roadside unit devices in the recording point information that outputs a recording point every first time interval, and the recording points are determined to be valid coverage points or invalid coverage points of the corresponding target roadside unit devices (part or all of all roadside unit devices) based on the corresponding number of roadside traffic event information items of different target roadside unit devices.

[0084] Furthermore, each roadside unit device has a different unique identifier, and the recording point information of the recording point can be used to determine that the recording points are valid coverage points or invalid coverage points of the roadside unit devices with different unique identifiers. The valid coverage points or invalid coverage points of different roadside unit devices can also be marked with different marks (including but not limited to marking with different shapes and colors) and displayed on the map.

[0085] In some embodiments of the present invention, optionally, valid coverage points and invalid coverage points are distinguished by marking the latitude and longitude coordinates of the recording points with different colors or shapes on the map.

[0086] Specifically, valid coverage points are marked in red and displayed on the map, and invalid coverage points are marked in white and displayed on the map.

[0087] In some embodiments of the present invention, optionally, the calculation formula of the packet loss rate of the recording point is:

[0088] 1-(the number of roadside traffic event information items received from the target roadside unit device within the first time interval) / (the broadcast rhythm of the target roadside unit device*the first time interval).

[0089] In an embodiment of the present invention, a statistical method of packet loss rate combined with GNSS coordinate points is used to test the coverage range of the roadside unit equipment instead of signal quality and signal strength. The statistics are relatively simple, and there is no need for a CV2X (Cellular Vehicle-to-Everything, i.e., V2X technology based on cellular communication technology) module to support the collection of signal quality and signal strength, nor is there a need for the roadside unit equipment or the vehicle-mounted unit equipment to add additional statistical function development.

[0090] In some embodiments of the present invention, optionally, if it is necessary to improve the statistical accuracy of the coverage range of the roadside unit equipment, the broadcast rhythm of the roadside unit equipment in broadcasting roadside traffic event information can be increased while the test vehicle speed remains unchanged, and the first time interval for the recording point to output the recording point information can be shortened.

[0091] In some embodiments of the present invention, optionally, when the sampling interval (ie, the first time interval) is set to 5 seconds, 50 RSI messages can be received under normal circumstances, so that the statistical accuracy of the packet loss rate can be controlled at 2%.

[0092] In some embodiments of the present invention, optionally, to ensure that the coverage accuracy of the roadside unit equipment is no more than 50 meters, a vehicle equipped with an OBU device travels through the section to be tested at a speed not exceeding 36 km / h, and can complete all the sections to be tested at one time.

[0093] In some embodiments of the present invention, optionally, in order to further optimize the test results of the coverage range of the target roadside unit equipment, vehicles with the same or different parameters can be set to travel multiple times on the same road equipped with the same target roadside unit equipment, and multiple data can be obtained for processing to optimize the test results of the coverage range of the target roadside unit equipment.

[0094] In some embodiments of the present invention, the electronic device may optionally process and display the recorded point information in a variety of ways as required (including but not limited to different marking shapes and colors) to determine the coverage of the target roadside unit equipment.

[0095] In some embodiments of the present invention, optionally, when the RSU device to be tested (target roadside unit device) set up at the intersection broadcasts RSI messages from the PC5 air interface at a rhythm of 10Hz, the test vehicle traveling on the road is equipped with an OBU device for receiving RSI messages. When the OBU device receives the PC5 broadcast message, it will determine whether the message is an RSI message, and whether the parsed ID matches the ID of the RSU to be tested. If it matches, a timestamp of receiving the message (including year, month, day, hour, minute, and second information, accurate to milliseconds) is output on the device log. If the GNSS module of the OBU device is configured to output at least one NMEA format message every 5 seconds (assuming that the first time interval is set to 5 seconds), the message contains at least GPRMC data, and the message is also saved in the device log. The electronic device receives the NMEA message that associates the RSI message with the time period according to the timestamp, and determines whether the corresponding position is a valid coverage point by judging whether the number of RSI messages corresponding to each NMEA message exceeds the threshold (assuming that the first threshold is set to 45).

[0096] Specifically, the electronic device can extract two sets of data from the log of the OBU device by using software such as UltraEdit: one set is the timestamp of receiving the RSI message, and the other set is the 5-second interval timestamp extracted from the GPRMC message and the latitude and longitude at that time (the starting point of the timestamp is the first 5-second interval timestamp after receiving the first RSI message, and the end point of the timestamp is the first 5-second interval timestamp after receiving the last RSI message). The two sets of data are arranged in the order of the time when the RSI message is received in an Excel table, and the number of messages received in each 5-second interval is calculated using the Excel FREQUENCY formula, and placed in the LABEL column. At the same time, a judgment column for whether it is effectively covered is added, and the judgment of more than or equal to 45 is set as effective coverage. It can be realized that the data of effective coverage and ineffective coverage can be respectively exported into two csv files.

[0097] See also Figure 6 , Figure 6The third flowchart of a method for testing the coverage of a roadside unit provided in an embodiment of the present invention; import the above two csv file data into Global Mapper, and mark the valid coverage points as diamonds, and the invalid coverage points as circles. The recording points of the same longitude and latitude can correspond to the recording point information of one or more target roadside unit devices, and the recording point information of different target roadside unit devices can be displayed separately and on the same map. In this embodiment, Figure 6 611 is a hollow diamond representing a valid coverage point of the first target roadside unit device, and 612 is a hollow circle representing an invalid coverage point of the first target roadside unit device; 621 is a shaded diamond representing a valid coverage point of the second target roadside unit device, and 622 is a shaded circle representing an invalid coverage point of the second target roadside unit device. Figure 6 A method is provided for displaying recorded point information of different target roadside unit devices on the same picture, wherein the longitude and latitude of recorded points of the first target roadside unit device and the second target roadside unit device in the same time interval are the same or approximately the same.

[0098] See also Figure 7 , Figure 7 The fourth flowchart of a method for testing the coverage of a roadside unit provided in an embodiment of the present invention; finally, the two csv files are exported as kmz files, and the coverage distribution map of the roadside unit to be tested on the actual street can be previewed on the Google Earth map. In this embodiment, Figure 7 711 is a hollow diamond, indicating that the first target roadside unit device marks each recorded point as a valid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point; 712 is a hollow circle, indicating that the first target roadside unit device marks each recorded point as an invalid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point; 721 is a shaded diamond, indicating that the second target roadside unit device marks each recorded point as a valid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point; 722 is a shaded circle, indicating that the second target roadside unit device marks each recorded point as an invalid coverage point on the actual street based on the longitude and latitude coordinates of each recorded point. Figure 7 A method is provided for displaying coverage areas of different target roadside unit devices on the same picture, wherein the longitude and latitude of points recorded by the first target roadside unit device and the second target roadside unit device in the same time interval are the same or approximately the same.

[0099] In some embodiments of the present invention, optionally, Figure 6 The diamond 611 can also be represented as the effective coverage point of the third target roadside unit device, and the circle 612 can be represented as the effective coverage point of the fourth target roadside unit device.

[0100] In some embodiments of the present invention, optionally, Figure 7The diamond 711 in the figure can also indicate that according to the longitude and latitude coordinates of each recorded point, this point is an effective coverage point of the third target roadside unit equipment on the actual street. The circle 712 indicates that according to the longitude and latitude coordinates of each recorded point, this point is an effective coverage point of the fourth target roadside unit equipment on the actual street.

[0101] In addition, the electronic device can also be set to print the current longitude and latitude every 5 seconds and the number of RSI messages received in the previous 5 seconds as a record point, write the record points greater than or equal to 45 in the covered.csv file, and write the record points less than 45 in the uncovered.csv file, so as to directly obtain the coverage of the RSU device. After obtaining the coverage, the results can be visualized on the map.

[0102] See also Figure 3 , Figure 3 One of the structural schematic diagrams of a coverage testing device for a roadside unit device provided in an embodiment of the present invention; the coverage testing device 30 for a roadside unit device comprises:

[0103] The first receiving module 31 is used to receive roadside traffic event information broadcasted by the roadside unit device based on a preset broadcast rhythm during the driving process of the vehicle;

[0104] The statistical module 32 is used to output the recording point information of one or more recording points every first time interval, each of the recording point information includes the longitude and latitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding to it; the recording point information is used to determine whether the recording point is a valid coverage point or an invalid coverage point of a roadside unit device with a different unique identifier.

[0105] In the embodiment of the present invention, the coverage range test device of the roadside unit equipment can calculate the packet loss rate of the roadside unit equipment with different unique identifiers on a certain road section or a block of a road network by using the unique identifiers of the roadside unit equipment on both sides of the driving road and the number of roadside traffic time information corresponding to the roadside unit equipment and the longitude and latitude of the vehicle-mounted equipment at different times regularly received by the vehicle-mounted equipment unit on the driving vehicle, and determine the recording points as the effective coverage points and invalid coverage points of different roadside unit equipment; the data of an entire block can be collected at one time, classified and summarized, and the coverage range of multiple roadside unit equipment can be analyzed at one time, so as to efficiently and accurately realize the coverage range test of the roadside unit equipment, improve the test efficiency, and save statistical manpower. This method is also more advantageous in analyzing the signal coverage range of complex urban roads and planning the installation points of roadside unit equipment.

[0106] In some embodiments of the present invention, optionally, the on-board unit device is provided with a GNSS module for outputting the longitude and latitude of the on-board unit device.

[0107] In the embodiment of the present invention, the on-board unit device outputs the longitude and latitude of the on-board unit device quickly and accurately by carrying a GNSS module.

[0108] Specifically, the GNSS module provided in the vehicle-mounted device will periodically output at least one NMEA format message, which at least includes GPRMC data, and the GPRMC data includes the latitude and longitude of the vehicle-mounted unit device at the current moment, and the message will also be saved in the log file log of the vehicle-mounted unit device. The OBU device achieves time calibration with an accuracy of within 1 millisecond through the 1PPS second pulse of the internal GNSS module.

[0109] In some embodiments of the present invention, optionally, if the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the recording point information is also used to determine the target roadside unit device based on the unique identifier, and determine that the recording point is a valid coverage point or an invalid coverage point of the target roadside unit device. In an embodiment of the present invention, if the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the target roadside unit device can be determined based on the unique identifier, and the packet loss rate of the target roadside unit device on a road network of a certain road section or a block can be calculated in combination with the longitude and latitude of the vehicle-mounted device at different times, and the valid coverage point and invalid coverage point of the target roadside unit device can be determined, so that the coverage range test of the target roadside unit device is realized efficiently and more accurately, the test efficiency and test accuracy are improved, and statistical manpower is saved. The device receives the recording point information of multiple roadside unit devices at one time, and the user can filter the target roadside unit device and calculate its coverage range according to his own needs. It is also more advantageous for analyzing the signal coverage range of complex urban roads and planning the installation points of roadside unit devices.

[0110] It should be noted that all relevant contents of each step involved in the above-mentioned embodiment of the coverage test method of the roadside unit equipment on the on-board unit equipment side of the vehicle can be referred to the functional description of the corresponding functional module, and will not be repeated here.

[0111] See also Figure 4 , Figure 4 One of the structural schematic diagrams of an electronic device provided by an embodiment of the present invention;

[0112] The electronic device 40 includes:

[0113] The second receiving module 41 is used to receive the recording point information of the recording point output by the vehicle-mounted unit device, and the recording point information of each recording point includes the latitude and longitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the vehicle-mounted unit device is set on a moving vehicle;

[0114] The determination module 42 is used to determine whether the recording point is a valid coverage point or an invalid coverage point of different roadside unit devices according to different unique identifiers and the number of roadside traffic event information pieces corresponding thereto.

[0115] In an embodiment of the present invention, the on-board unit device is arranged on a moving vehicle, and the electronic device receives the recording point information of the recording point output by the on-board unit device. The recording point information of each recording point includes the latitude and longitude of the on-board unit device at the end time of the corresponding first time interval and the unique identifiers of all roadside unit devices received in the corresponding first time interval and the number of roadside traffic event information corresponding thereto. According to different unique identifiers and the number of roadside traffic event information corresponding thereto, the recording point can be determined as a valid coverage point or an invalid coverage point of different roadside unit devices. By using existing data analysis tools, the analysis results can be obtained quickly without setting up a special data analysis server to collect statistical measurement results. The coverage display of the roadside unit device is realized quickly, intuitively and accurately, the test efficiency is improved, and statistical manpower is saved. When the recording point information includes multiple roadside unit devices, the coverage of multiple roadside unit devices can be analyzed and displayed at one time, and the coverage test of the roadside unit devices is realized efficiently and accurately, which improves the test efficiency.

[0116] In some embodiments of the present invention, optionally, the determination module 42 is also used to determine the target roadside unit device based on the unique identifier when the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, and display the longitude and latitude coordinates of the recording point on the map as a valid coverage point of the target roadside unit device; otherwise, display the longitude and latitude coordinates of the recording point on the map as an invalid coverage point of the target roadside unit device.

[0117] In an embodiment of the present invention, when the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold value, the target roadside unit device is determined based on the unique identifier, and the longitude and latitude coordinates of the recording point are displayed on the map as a valid coverage point of the target roadside unit device; otherwise, the longitude and latitude coordinates of the recording point are displayed on the map as an invalid coverage point of the target roadside unit device. The coverage range test of each roadside unit device is implemented efficiently and more accurately, which improves the test efficiency and test accuracy and saves statistical manpower. This method can analyze and display the coverage range of multiple roadside unit devices at one time, and is also more advantageous in analyzing the signal coverage range of complex urban roads and planning the installation points of roadside unit equipment.

[0118] It should be noted that all relevant contents of each step involved in the above-mentioned embodiment of the coverage testing method for the roadside unit device of the electronic device can be referred to the functional description of the corresponding functional module, and will not be repeated here.

[0119] See also Figure 5 , Figure 5 The second structural diagram of an electronic device provided for an embodiment of the present invention; the electronic device 50 includes a memory 51, a processor 52 and a program stored in the memory 51 and executable on the processor 52; when the processor 52 executes the program, each process of the embodiment of the method for testing the coverage range of the roadside unit equipment as described above is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0120] The embodiment of the present invention also provides a readable storage medium, on which a program is stored. When the program is executed by a processor, each process of the above-mentioned roadside unit equipment coverage test method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. Among them, the readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid state drive (SSD)), etc.

[0121] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for testing the coverage of a roadside unit, characterized in that: The method for the vehicle-mounted unit device applied to a vehicle includes: During the driving process of the vehicle, receiving the roadside traffic event information broadcasted by the roadside unit equipment based on the preset broadcast rhythm; Outputting recording point information of one or more recording points at each first time interval, each recording point information includes the longitude and latitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the recording point information is used to determine whether the recording point is a valid coverage point or an invalid coverage point of a roadside unit device with a different unique identifier, wherein each roadside unit device corresponds to a unique identifier, and different roadside unit devices have different unique identifiers; Among them, when the number of roadside traffic event information corresponding to the unique identifier in a recording point information is greater than a first threshold, the target roadside unit equipment is determined based on the unique identifier, and the longitude and latitude coordinates of the recording point are displayed on the map as the valid coverage point of the target roadside unit equipment; otherwise, the longitude and latitude coordinates of the recording point are displayed on the map as the invalid coverage point of the target roadside unit equipment.

2. The method for testing the coverage of a roadside unit according to claim 1, characterized in that: The on-board unit device is provided with a GNSS module for outputting a message containing the latitude and longitude of the on-board unit device.

3. A method for testing the coverage of a roadside unit, characterized in that: Used in electronic equipment, including: Receiving recording point information of recording points output by a vehicle-mounted unit device, the recording point information of each recording point including the latitude and longitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the vehicle-mounted unit device is arranged on a moving vehicle; According to different unique identifiers and the number of roadside traffic event information corresponding thereto, determining that the recording point is a valid coverage point or an invalid coverage point of different roadside unit devices; wherein each roadside unit device corresponds to a unique identifier, and different roadside unit devices have different unique identifiers; Wherein, the roadside traffic event is obtained by receiving a broadcast from a roadside unit device based on a preset broadcast rhythm during the driving process of the vehicle; When the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, the target roadside unit equipment is determined based on the unique identifier, and the longitude and latitude coordinates of the recording point are displayed on the map as valid coverage points of the target roadside unit equipment; otherwise, the longitude and latitude coordinates of the recording point are displayed on the map as invalid coverage points of the target roadside unit equipment.

4. A device for testing the coverage of a roadside unit, characterized in that: On-board unit equipment used in vehicles, including: A first receiving module is used to receive roadside traffic event information broadcasted by a roadside unit device based on a preset broadcast rhythm during the driving process of the vehicle; A statistics module, used for outputting the recording point information of one or more recording points at each first time interval, each of the recording point information including the longitude and latitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the recording point information is used to determine whether the recording point is a valid coverage point or an invalid coverage point of a roadside unit device with a different unique identifier; wherein each roadside unit device corresponds to a unique identifier, and different roadside unit devices have different unique identifiers; Among them, when the number of roadside traffic event information corresponding to the unique identifier in a recording point information is greater than a first threshold, the target roadside unit equipment is determined based on the unique identifier, and the longitude and latitude coordinates of the recording point are displayed on the map as the valid coverage point of the target roadside unit equipment; otherwise, the longitude and latitude coordinates of the recording point are displayed on the map as the invalid coverage point of the target roadside unit equipment.

5. An electronic device, characterized in that: include: A second receiving module is used to receive the recording point information of the recording point output by the vehicle-mounted unit device, wherein the recording point information of each recording point includes the latitude and longitude of the vehicle-mounted unit device at the end time of the corresponding first time interval and the unique identifier of the roadside unit device received within the corresponding first time interval and the number of roadside traffic event information corresponding thereto; the vehicle-mounted unit device is arranged on a moving vehicle; A determination module is used to determine whether the recording point is a valid coverage point or an invalid coverage point of different roadside unit devices according to different unique identifiers and the number of roadside traffic event information corresponding thereto; wherein each roadside unit device corresponds to a unique identifier, and different roadside unit devices have different unique identifiers; wherein the roadside traffic event is obtained by receiving a broadcast based on a preset broadcast rhythm by a roadside unit device during the driving process of the vehicle; The determination module is also used to determine the target roadside unit equipment based on a unique identifier when the number of roadside traffic event information corresponding to a unique identifier in a recording point information is greater than a first threshold, and display the longitude and latitude coordinates of the recording point on the map as a valid coverage point of the target roadside unit equipment; otherwise, display the longitude and latitude coordinates of the recording point on the map as an invalid coverage point of the target roadside unit equipment.

6. An electronic device, characterized in that: It comprises a memory, a processor and a program stored in the memory and executable on the processor; it is characterized in that when the processor executes the program, the steps in the method for testing the coverage of a roadside unit device as described in any one of claims 1 or 2 are implemented; or when the processor executes the program, the steps in the method for testing the coverage of a roadside unit device as described in claim 3 are implemented.

7. A readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the steps in the method for testing the coverage of a roadside unit device as described in any one of claims 1 or 2 are implemented; or when the processor executes the program, the steps in the method for testing the coverage of a roadside unit device as described in claim 3 are implemented.

Images