A test system and method for power coverage of roadside unit

Abstract

The embodiment of the present application provides a test system and method for the power coverage of a roadside unit, the method comprising: receiving the uplink received power sent by multiple roadside units and the uplink signal transmission position corresponding to each uplink received power; for each uplink received power sent by each roadside unit, based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal, calculating the predicted received power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink received power; for each uplink signal transmission position, counting the predicted received power of the downlink signal from each roadside unit as the test result of the power coverage of the roadside unit at the uplink signal transmission position. Efficient and convenient testing of the power coverage of the roadside unit is achieved, greatly reducing the required manpower and material resources.

Description

Technical Field

[0001] The present application relates to the field of vehicle networking communication technology, and in particular to a testing system and method for roadside unit power coverage. Background Art

[0002] V2X (vehicle to everything) refers to the information exchange between vehicles and all external things, mainly including communication between vehicles and communication between vehicles and RSU (Road Side Unit). Among them, the road side unit is a communication gateway deployed on the road side, which can broadcast road side information such as traffic lights and sensors to road traffic participants, and is an indispensable anchor point for the Internet of Vehicles business.

[0003] The coverage and penetration of roadside units are constantly increasing, so the coverage quality of roadside units is also a topic that needs to be studied. OBU (On Board Unit) is the central communication unit of the vehicle and the key device for the vehicle to achieve V2X communication with the outside world in the era of Internet of Vehicles. The on-board unit establishes a connection with the roadside unit for data exchange.

[0004] Usually, the OMU only needs to exchange data with the RSU that is closer. However, when the power coverage of the RSU is not reasonable enough, the OMU may receive signals from multiple RSUs at the same time, which will have an adverse effect on the processing capability and processing delay of the OMU.

[0005] Therefore, it is necessary to test the power coverage of the roadside unit. In the existing test method, the tester needs to drive the test vehicle along a specific route, and the on-board unit in the test vehicle receives the signal sent by the roadside unit and determines the received power of the signal, thereby determining the power coverage of the roadside unit at different locations, that is, the power of the signal received from each roadside unit at different locations.

[0006] However, only by traversing the test routes within the test area can a relatively complete roadside unit power coverage be obtained, which requires a lot of manpower and material resources. Summary of the invention

[0007] The purpose of the embodiment of the present application is to provide a system and method for testing the power coverage of a roadside unit, so as to achieve efficient and convenient testing of the power coverage of the roadside unit, greatly reducing the required manpower and material resources. The specific technical solution is as follows:

[0008] To achieve the above-mentioned purpose, an embodiment of the present application provides a test system for power coverage of a roadside unit, the system comprising: a service platform and a plurality of roadside units;

[0009] The roadside unit is used to receive uplink signals sent by multiple vehicle-mounted units, determine the uplink receiving power of each uplink signal, and the uplink signal transmission position of the vehicle-mounted unit contained in each uplink signal, and send each uplink receiving power and the uplink signal transmission position corresponding to each uplink receiving power to the service platform;

[0010] The service platform is used to calculate, for each uplink receiving power sent by each roadside unit, the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band are equal, and for each uplink signal transmission position, count the predicted receiving power of the downlink signal from each roadside unit as the test result of the roadside unit power coverage at the uplink signal transmission position.

[0011] Optionally, the step of calculating, for each uplink received power sent by each roadside unit, a predicted received power of a downlink signal from the roadside unit received at an uplink signal transmission position corresponding to the uplink received power based on the principle that path losses of uplink signals and downlink signals in the same frequency band are equal, comprises:

[0012] Based on the principle that the path loss of uplink and downlink signals in the same frequency band is equal, the equation relationship between the uplink received power, the transmit power of the onboard unit, the transmit power of the roadside unit, the gain of the onboard unit's receive antenna and transmit antenna, the gain of the roadside unit's receive antenna and transmit antenna, and the predicted receive power of the downlink signal is calculated;

[0013] For each uplink receiving power sent by each roadside unit, based on the preset transmission power of the vehicle-mounted unit, the transmission power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the equation relationship, the predicted receiving power of the downlink signal from the roadside unit received at the uplink signal transmission position corresponding to the uplink receiving power is calculated.

[0014] Optionally, the equation relationship is:

[0015] P inOBU =P outRSU -P outOBU +P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU

[0016] Among them, P inOBU represents the predicted received power of the downlink signal, P outRSURepresents the transmission power of the roadside unit, P outOBU Indicates the transmission power of the vehicle-mounted unit, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Indicates the diversity gain of the roadside unit's receiving antenna.

[0017] To achieve the above object, an embodiment of the present application provides a method for testing power coverage of a roadside unit, which is applied to a service platform in a test system for power coverage of a roadside unit. The method includes:

[0018] Receiving uplink receiving powers sent by multiple roadside units and uplink signal transmission positions corresponding to each uplink receiving power; wherein the uplink receiving power and the uplink signal transmission position are determined after the roadside unit receives uplink signals sent by multiple vehicle-mounted units;

[0019] For each uplink received power sent by each roadside unit, based on the principle that the path loss of uplink signals and downlink signals in the same frequency band is equal, calculate the predicted received power of the downlink signal from the roadside unit received at the uplink signal transmission position corresponding to the uplink received power;

[0020] For each uplink signal transmission position, the predicted received power of the downlink signal from each roadside unit is counted as a test result of the roadside unit power coverage at the uplink signal transmission position.

[0021] Optionally, the step of calculating, for each uplink received power sent by each roadside unit, a predicted received power of a downlink signal from the roadside unit received at an uplink signal transmission position corresponding to the uplink received power based on the principle that path losses of uplink signals and downlink signals in the same frequency band are equal, comprises:

[0022] Based on the principle that the path loss of uplink and downlink signals in the same frequency band is equal, the equation relationship between the uplink received power, the transmit power of the onboard unit, the transmit power of the roadside unit, the gain of the onboard unit's receive antenna and transmit antenna, the gain of the roadside unit's receive antenna and transmit antenna, and the predicted receive power of the downlink signal is calculated;

[0023] For each uplink receiving power sent by each roadside unit, based on the preset transmission power of the vehicle-mounted unit, the transmission power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the equation relationship, the predicted receiving power of the downlink signal from the roadside unit received at the uplink signal transmission position corresponding to the uplink receiving power is calculated.

[0024] Optionally, the equation relationship is:

[0025] P inOBU =P outRSU -P outOBU +P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU

[0026] Among them, P inOBU represents the predicted received power of the downlink signal, P outRSU Represents the transmission power of the roadside unit, P outOBU Indicates the transmission power of the vehicle-mounted unit, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Indicates the diversity gain of the roadside unit's receiving antenna.

[0027] Optionally, after counting the predicted received power of downlink signals from each roadside unit for each uplink signal transmission position as a test result of the roadside unit power coverage at the uplink signal transmission position, the method further includes:

[0028] Determine the target roadside unit to be adjusted according to the test results of the roadside unit power coverage at different uplink signal transmission positions;

[0029] A power tuning instruction is sent to each of the target roadside units, so that each of the target roadside units tunes the transmission power based on the power tuning instruction.

[0030] To achieve the above-mentioned purpose, the embodiment of the present application further provides a test device for roadside unit power coverage, which is applied to a service platform in a test system for roadside unit power coverage, and the device includes:

[0031] A receiving module, used for receiving uplink receiving powers sent by multiple roadside units and uplink signal transmission positions corresponding to each uplink receiving power; wherein the uplink receiving power and the uplink signal transmission position are determined after the roadside unit receives uplink signals sent by multiple vehicle-mounted units;

[0032] A calculation module is used to calculate, for each uplink received power sent by each roadside unit, a predicted received power of a downlink signal received from the roadside unit at an uplink signal transmission position corresponding to the uplink received power based on the principle that the path losses of uplink signals and downlink signals in the same frequency band are equal;

[0033] The statistical module is used to count the predicted received power of the downlink signal from each roadside unit for each uplink signal transmission position as a test result of the roadside unit power coverage at the uplink signal transmission position.

[0034] To achieve the above-mentioned purpose, an embodiment of the present invention further provides a service platform, including a processor, a communication interface, a memory and a communication bus; wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0035] Memory, used to store computer programs;

[0036] The processor is used to implement any of the above method steps when executing the program stored in the memory.

[0037] To achieve the above objectives, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, any of the above method steps is implemented.

[0038] Beneficial effects of the embodiments of the present application:

[0039] Using the test system and method for roadside unit power coverage provided in the embodiments of the present application, the roadside unit receives uplink signals sent by multiple vehicle-mounted units, determines the uplink receiving power of each uplink signal, and the uplink signal transmission position of the vehicle-mounted unit contained in each uplink signal, and sends each uplink receiving power and the uplink signal transmission position corresponding to each uplink receiving power to a service platform; the service platform calculates, for each uplink receiving power sent by each roadside unit, the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power based on the principle that the path loss of uplink signals and downlink signals in the same frequency band is equal, the predicted receiving power represents the receiving power of the downlink signal received by the vehicle-mounted unit if the roadside unit sends a downlink signal to the vehicle-mounted unit at the uplink signal transmission position; and for each uplink signal transmission position, the predicted receiving power of the downlink signal from each roadside unit is counted as the test result of the roadside unit power coverage at the uplink signal transmission position.

[0040] It can be seen that based on the principle that the path loss of uplink and downlink signals in the same frequency band is equal, the predicted received power of the downlink signal at the corresponding position is calculated according to the uplink received power of the uplink signal received by the roadside unit. Therefore, user-level vehicles equipped with on-board units can provide data for the power coverage test of the roadside unit, without the need for dedicated testers to drive the vehicle to complete the test, achieving efficient and convenient testing of the power coverage of the roadside unit, greatly reducing the required manpower and material resources.

[0041] Of course, implementing any product or method of the present application does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0043] Figure 1 A schematic diagram of a structure of a test system for power coverage of a roadside unit provided in an embodiment of the present application;

[0044] Figure 2 A schematic flow chart of a method for testing the power coverage of a roadside unit provided in an embodiment of the present application;

[0045] Figure 3 Another schematic flow chart of a method for testing the power coverage of a roadside unit provided in an embodiment of the present application;

[0046] Figure 4A schematic diagram of a structure of a test device for power coverage of a roadside unit provided in an embodiment of the present application;

[0047] Figure 5 A schematic diagram of the structure of the service platform provided in the embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.

[0049] In order to solve the technical problem in the prior art that testing the power coverage of roadside units requires testers to drive the vehicle for testing, which consumes a lot of manpower and material resources, the embodiments of the present application provide a roadside unit power coverage testing system and method, which can be applied to the LTE-V2X communication field.

[0050] The following first introduces the test system for the power coverage of the roadside unit provided in the embodiment of the present application. Figure 1 , Figure 1 A schematic diagram of a structure of a test system for the power coverage of a roadside unit provided in an embodiment of the present application. Figure 1 As shown in FIG. 1 , the system includes a service platform and multiple roadside units. Since the roadside unit needs to receive the uplink signal sent by the vehicle-mounted unit, Figure 1 The on-board unit is also shown.

[0051] In an embodiment of the present application, the roadside unit is used to receive uplink signals sent by multiple vehicle-mounted units, determine the uplink receiving power of each uplink signal, and the uplink signal transmission position of the vehicle-mounted unit contained in each uplink signal, and send each uplink receiving power and the uplink signal transmission position corresponding to each uplink receiving power to the service platform.

[0052] In the embodiment of the present application, in order to significantly reduce the manpower and material resources required for the test and avoid dedicated testers driving the vehicle for testing, the uplink receiving power received by the roadside unit from the vehicle-mounted unit is used to predict the downlink receiving power of the downlink signal received by the vehicle-mounted unit, thereby realizing the test of the power coverage of the roadside unit.

[0053] Therefore, in the embodiment of the present application, the on-board unit does not come from a dedicated test vehicle, that is, any user-level vehicle equipped with an on-board unit and with a positioning service enabled can provide corresponding data for the test of the roadside unit power coverage.

[0054] Specifically, these user-level vehicles send uplink signals to the roadside unit through the on-board unit while driving. The roadside unit then receives the uplink signals sent by each on-board unit, determines the uplink receiving power of each uplink signal, and parses the uplink signal transmission position of the on-board unit from the uplink signal, that is, the position of the on-board unit when the uplink signal is sent. The position may include the latitude and longitude in the GPS position information.

[0055] The roadside unit can send each uplink power received by itself and the corresponding uplink signal transmission position to the service platform. In addition, the sent signal can carry its own identification so that the service platform can identify the roadside unit to which the signal belongs.

[0056] In an embodiment of the present application, the service platform is used to integrate the uplink receiving power and the uplink signal transmission position sent by each roadside device, and calculate the predicted receiving power of the downlink signal based on the uplink receiving power to achieve the evaluation of the power coverage of the roadside unit.

[0057] Specifically, for each uplink receiving power transmitted by each roadside unit, the service platform calculates the predicted receiving power of the downlink signal from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band are equal.

[0058] The predicted receiving power indicates the receiving power of the downlink signal received by the onboard unit if the roadside unit sends a downlink signal to the onboard unit at the uplink signal transmission position.

[0059] In the LTE-V2X communication used in the embodiments of the present application, the uplink signal and the downlink signal are in the same frequency band, that is, for the same vehicle-mounted unit and roadside unit, the uplink and downlink path losses between the two should be equal. Therefore, the inventors of the present application have calculated the equation relationship between the uplink receiving power, the transmitting power of the vehicle-mounted unit, the transmitting power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the predicted receiving power of the downlink signal based on the principle of equal path loss. Based on this equation relationship, the predicted receiving power of the downlink signal can be inferred.

[0060] Specifically, for the uplink, the following conditions must be met:

[0061] P inRSU =P outOBU -L pRSU +G aRSU +G aOBU +G dRSU -LP up

[0062] Among them, P inRSUIndicates the uplink received power, P outOBU Indicates the transmission power of the vehicle-mounted unit, L pRSU Represents the antenna loss of the roadside unit, including feeder cable loss, connector loss, etc., G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Represents the diversity gain of the receiving antenna of the roadside unit, LP up Indicates the uplink path loss.

[0063] For the downlink, the following conditions must be met:

[0064] P inOBU =P outRSU -L pRSU +H aRSU +H aOBU +H dOBU -LP down

[0065] Among them, P inOBU represents the predicted received power of the downlink signal, P outRSU Indicates the transmission power of the roadside unit, L pRSU Represents the antenna loss of the roadside unit, including feeder cable loss, connector loss, etc. aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU Represents the diversity gain of the receiving antenna of the vehicle-mounted unit, LP down Indicates the downlink path loss.

[0066] Since the uplink and downlink path losses are equal, LP up =LP down , combined with the above two equations, the received power of the downlink signal can be predicted. Specifically, the equation relationship between the uplink received power, the transmit power of the vehicle-mounted unit, the transmit power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the predicted received power of the downlink signal can be obtained, that is:

[0067] P inOBU =P outRSU -P outOBU +P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU

[0068] Furthermore, the current LTE-V2X network stipulates that the transmission power of the vehicle-mounted unit and the transmission power of the roadside unit are both defined as 23dBm, that is, P outRSU =P outOBU After the antenna selection is determined, the gain is a known and determined value. Therefore, it is only necessary to obtain the uplink received power to deduce the predicted received power of the downlink signal received from the roadside unit at the uplink signal transmission position.

[0069] In the embodiment of the present application, during the test, the received power of the downlink signal is predicted, that is, the roadside unit does not need to send a downlink signal to the vehicle-mounted unit, the vehicle-mounted unit does not need to receive a downlink signal, and there is no need to send the received power of the downlink signal to the service platform. In other words, there is no need to use a dedicated test vehicle to complete the test. The user-level vehicle equipped with the vehicle-mounted unit can provide data for the roadside unit power coverage test, and the test of the roadside unit power coverage can be achieved based on the data provided by these user-level vehicles.

[0070] In an embodiment of the present application, for each uplink signal transmission position, the service platform can count the predicted received power of the downlink signal from each roadside unit as a test result of the roadside unit power coverage at the uplink signal transmission position.

[0071] A test system for roadside unit power coverage provided in an embodiment of the present application is adopted, wherein the roadside unit receives uplink signals sent by multiple vehicle-mounted units, determines the uplink receiving power of each uplink signal and the uplink signal transmission position of the vehicle-mounted unit contained in each uplink signal, and sends each uplink receiving power and the uplink signal transmission position corresponding to each uplink receiving power to a service platform; the service platform calculates, for each uplink receiving power sent by each roadside unit, the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power based on the principle that the path loss of uplink signals and downlink signals in the same frequency band is equal, wherein the predicted receiving power indicates the receiving power of the downlink signal received by the vehicle-mounted unit if the roadside unit sends a downlink signal to the vehicle-mounted unit at the uplink signal transmission position; and for each uplink signal transmission position, the predicted receiving power of the downlink signal from each roadside unit is counted as the test result of the roadside unit power coverage at the uplink signal transmission position.

[0072] It can be seen that based on the principle that the path loss of uplink and downlink signals in the same frequency band is equal, the predicted received power of the downlink signal at the corresponding position is calculated according to the uplink received power of the uplink signal received by the roadside unit. Therefore, user-level vehicles equipped with on-board units can provide data for the power coverage test of the roadside unit, without the need for dedicated testers to drive the vehicle to complete the test, achieving efficient and convenient testing of the power coverage of the roadside unit, greatly reducing the required manpower and material resources.

[0073] See also Figure 2 , Figure 2 The test method for the power coverage of the roadside unit provided in the embodiment of the present application can be applied to the service platform in the test system of the power coverage of the roadside unit, such as Figure 2 As shown, the method comprises the following steps:

[0074] S201: Receive uplink receiving powers sent by multiple roadside units and uplink signal transmission positions corresponding to each uplink receiving power; wherein the uplink receiving power and the uplink signal transmission position are determined after the roadside unit receives uplink signals sent by multiple vehicle-mounted units.

[0075] In an embodiment of the present application, a roadside unit receives uplink signals sent by multiple vehicle-mounted units, determines the uplink receiving power of each uplink signal and the uplink signal transmission position of the vehicle-mounted unit contained in each uplink signal, and sends each uplink receiving power and the uplink signal transmission position corresponding to each uplink receiving power to a service platform.

[0076] The service platform can receive uplink receiving powers sent by multiple roadside units and the uplink signal transmission position corresponding to each uplink receiving power.

[0077] S202: For each uplink receiving power sent by each roadside unit, based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal, calculate the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power. The predicted receiving power represents the receiving power of the downlink signal received by the vehicle-mounted unit if the roadside unit sends a downlink signal to the vehicle-mounted unit at the uplink signal transmission position.

[0078] In the embodiment of the present application, based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal, the equation relationship between the uplink receiving power, the transmitting power of the vehicle-mounted unit, the transmitting power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the predicted receiving power of the downlink signal can be calculated. Specifically, it can be expressed as:

[0079] P inOBU =P outRSU -P outOBU +P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU

[0080] Among them, P inOBU represents the predicted received power of the downlink signal, PoutRSU Represents the transmission power of the roadside unit, P outOBU Indicates the transmission power of the vehicle-mounted unit, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Indicates the diversity gain of the roadside unit's receiving antenna.

[0081] Thus, for each uplink receiving power sent by each roadside unit, based on the preset transmission power of the vehicle-mounted unit, the transmission power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the above-mentioned equation relationship, the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power is calculated.

[0082] S203: For each uplink signal transmission position, the predicted received power of the downlink signal from each roadside unit is counted as a test result of the roadside unit power coverage at the uplink signal transmission position.

[0083] The test method for the power coverage of the roadside unit provided in the embodiment of the present application is adopted, based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal, and the predicted received power of the downlink signal at the corresponding position is calculated according to the uplink received power of the uplink signal received by the roadside unit. Thus, a user-level vehicle equipped with an on-board unit can provide data for the power coverage test of the roadside unit, without the need for a dedicated tester to drive the vehicle to complete the test, thus achieving efficient and convenient testing of the power coverage of the roadside unit, greatly reducing the required manpower and material resources.

[0084] For ease of understanding, the following Figure 3 The testing method for the power coverage of the roadside unit provided in the embodiment of the present application is further introduced. Figure 3 Another flowchart diagram of a method for testing the power coverage of a roadside unit provided in an embodiment of the present application.

[0085] like Figure 3As shown, the onboard unit sends an uplink single-tone signal to the roadside unit, and each roadside unit receives the uplink single-tone signal sent by different onboard units at different locations, determines the uplink receiving power and the corresponding transmitting position, and uploads the uplink receiving power and the transmitting position to the service platform; for each transmitting position, the service platform calculates the predicted receiving power of the onboard unit receiving the downlink signal from different roadside units at the transmitting position based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band are equal, as the test result of the power coverage of the roadside unit at the transmitting position. Then the service platform combines the test results of the power coverage of the roadside unit at each transmitting position to obtain the final test result of the power coverage of the roadside unit in the test area.

[0086] In one embodiment of the present application, after step S203, the service platform can determine the power coverage status of the roadside unit, and if unreasonable power coverage occurs, the roadside unit can be instructed to perform power optimization.

[0087] The service platform can determine the target roadside unit to be adjusted based on the test results of the roadside unit power coverage at different uplink signal transmission positions, and send a power tuning instruction to each target roadside unit so that each target roadside unit can tune the transmission power based on the power tuning instruction.

[0088] Specifically, the transmission power of the target roadside unit can be adjusted according to factors such as the wireless environment and communication needs, thereby reducing the probability that the on-board unit at the same location simultaneously receives downlink signals from multiple roadside units, thereby reducing the processing performance requirements for the on-board unit and ensuring the real-time and effectiveness of vehicle-road collaboration.

[0089] The present application also provides a test device for the power coverage of a roadside unit, see Figure 3 , the device may include the following modules:

[0090] The receiving module 401 is used to receive uplink receiving powers sent by multiple roadside units and uplink signal transmission positions corresponding to each uplink receiving power; wherein the uplink receiving power and the uplink signal transmission position are determined after the roadside unit receives uplink signals sent by multiple vehicle-mounted units;

[0091] The calculation module 402 is used to calculate, for each uplink reception power sent by each roadside unit, the predicted reception power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink reception power based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal, wherein the predicted reception power represents the reception power of the downlink signal received by the onboard unit if the roadside unit sends the downlink signal to the onboard unit at the uplink signal transmission position;

[0092] The statistical module 403 is used to count the predicted received power of the downlink signal from each roadside unit for each uplink signal transmission position as a test result of the roadside unit power coverage at the uplink signal transmission position.

[0093] The test device for the power coverage of the roadside unit provided in the embodiment of the present application is used to calculate the predicted received power of the downlink signal at the corresponding position based on the uplink received power of the uplink signal received by the roadside unit, based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal. Thus, a user-level vehicle equipped with an on-board unit can provide data for the power coverage test of the roadside unit, without the need for a dedicated tester to drive the vehicle to complete the test, thus achieving efficient and convenient testing of the power coverage of the roadside unit, greatly reducing the required manpower and material resources.

[0094] In one embodiment of the present application, the calculation module 402 may be specifically used for:

[0095] Based on the principle that the path loss of uplink and downlink signals in the same frequency band is equal, the equation relationship between the uplink received power, the transmit power of the onboard unit, the transmit power of the roadside unit, the gain of the onboard unit's receive antenna and transmit antenna, the gain of the roadside unit's receive antenna and transmit antenna, and the predicted receive power of the downlink signal is calculated;

[0096] For each uplink receiving power sent by each roadside unit, based on the preset transmission power of the vehicle-mounted unit, the transmission power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the equation relationship, the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power is calculated.

[0097] In one embodiment of the present application, the equation relationship is:

[0098] P inOBU =P outRSU -P outOBU +P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU

[0099] Among them, P inOBU represents the predicted received power of the downlink signal, P outRSU Represents the transmission power of the roadside unit, P outOBU Indicates the transmission power of the vehicle-mounted unit, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, HaOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Indicates the diversity gain of the roadside unit's receiving antenna.

[0100] In one embodiment of the present application, Figure 4 Based on the device shown, a tuning module may also be included, which is specifically used for:

[0101] Determine the target roadside unit to be adjusted according to the test results of the roadside unit power coverage at different uplink signal transmission positions;

[0102] A power tuning instruction is sent to each target roadside unit, so that each target roadside unit tunes the transmission power based on the power tuning instruction.

[0103] The present application also provides a service platform. Figure 5 As shown, it includes a processor 501, a communication interface 502, a memory 503 and a communication bus 504, wherein the processor 501, the communication interface 502, and the memory 503 communicate with each other through the communication bus 504.

[0104] Memory 503, used for storing computer programs;

[0105] The processor 501 is used to execute the program stored in the memory 503, and implements the following steps:

[0106] Receiving uplink receiving powers sent by multiple roadside units and uplink signal transmission positions corresponding to each uplink receiving power; wherein the uplink receiving power and the uplink signal transmission position are determined after the roadside unit receives uplink signals sent by multiple vehicle-mounted units;

[0107] For each uplink receiving power sent by each roadside unit, based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal, the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power is calculated, and the predicted receiving power represents the receiving power of the downlink signal received by the onboard unit if the roadside unit sends the downlink signal to the onboard unit at the uplink signal transmission position;

[0108] For each uplink signal transmission position, the predicted received power of the downlink signal from each roadside unit is counted as a test result of the roadside unit power coverage at the uplink signal transmission position.

[0109] The communication bus mentioned in the above service platform can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0110] The communication interface is used for communication between the above service platform and other devices.

[0111] The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0112] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0113] In another embodiment provided in the present application, a computer-readable storage medium is also provided, in which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned roadside unit power coverage testing methods are implemented.

[0114] In another embodiment provided in the present application, a computer program product including instructions is also provided, which, when executed on a computer, enables the computer to execute the method for testing the power coverage of a roadside unit in any of the above embodiments.

[0115] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0116] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0117] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the test method, device, service platform, and computer storage medium embodiment of roadside unit power coverage, since they are basically similar to the test system embodiment of roadside unit power coverage, the description is relatively simple, and the relevant parts can be referred to the partial description of the test system embodiment of roadside unit power coverage.

[0118] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A test system for power coverage of a roadside unit, characterized in that: The system comprises: a service platform and a plurality of roadside units; The roadside unit is used to receive uplink signals sent by multiple vehicle-mounted units, determine the uplink receiving power of each uplink signal, and the uplink signal transmission position of the vehicle-mounted unit contained in each uplink signal, and send each uplink receiving power and the uplink signal transmission position corresponding to each uplink receiving power to the service platform, wherein the uplink signal is sent by the user-level vehicle to the roadside unit through the vehicle-mounted unit during driving; The service platform is used to calculate, for each uplink receiving power sent by each roadside unit, based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band is equal, the predicted receiving power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink receiving power, and for each uplink signal transmission position, to count the predicted receiving power of the downlink signal from each roadside unit as the test result of the power coverage of the roadside unit at the uplink signal transmission position; determine the target roadside unit to be adjusted according to the test results of the power coverage of the roadside units at different uplink signal transmission positions; send a power tuning instruction to each of the target roadside units according to the wireless environment and communication requirements, so that each of the target roadside units tunes the transmission power based on the power tuning instruction, so as to reduce the probability that the vehicle-mounted unit at the same position simultaneously receives the downlink signals of multiple roadside units, and calculate the predicted receiving power based on the following formula: P inOBU =P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU ; Among them, P inOBU represents the predicted received power of the downlink signal, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Indicates the diversity gain of the roadside unit's receiving antenna.

2. The system according to claim 1, characterized in that The step of calculating, for each uplink received power sent by each roadside unit, a predicted received power of a downlink signal from the roadside unit received at an uplink signal transmission position corresponding to the uplink received power based on the principle that path losses of uplink signals and downlink signals in the same frequency band are equal, comprises: Based on the principle that the path loss of uplink and downlink signals in the same frequency band is equal, the equation relationship between the uplink received power, the transmit power of the onboard unit, the transmit power of the roadside unit, the gain of the onboard unit's receive antenna and transmit antenna, the gain of the roadside unit's receive antenna and transmit antenna, and the predicted receive power of the downlink signal is calculated; For each uplink receiving power sent by each roadside unit, based on the preset transmission power of the vehicle-mounted unit, the transmission power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the equation relationship, the predicted receiving power of the downlink signal from the roadside unit received at the uplink signal transmission position corresponding to the uplink receiving power is calculated.

3. The system according to claim 2, characterized in that The equation relationship is: P inOBU =P outRSU -P outOBU +P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRBU Among them, P inOBU represents the predicted received power of the downlink signal, P outRSU Represents the transmission power of the roadside unit, P outOBU Indicates the transmission power of the vehicle-mounted unit, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Indicates the diversity gain of the roadside unit's receiving antenna.

4. A method for testing power coverage of a roadside unit, characterized in that: A service platform applied to a test system for roadside unit power coverage according to claim 1, the method comprising: Receiving uplink receiving powers sent by multiple roadside units and uplink signal transmission positions corresponding to each uplink receiving power; wherein the uplink receiving power and the uplink signal transmission position are determined after the roadside unit receives uplink signals sent by multiple vehicle-mounted units, wherein the uplink signals are sent by user-level vehicles to the roadside unit through the vehicle-mounted unit during driving; For each uplink received power sent by each roadside unit, based on the principle that the path loss of uplink signals and downlink signals in the same frequency band is equal, the predicted received power of the downlink signal received from the roadside unit at the uplink signal transmission position corresponding to the uplink received power is calculated, and the predicted received power is calculated based on the following formula: P inOBU =P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU ; Among them, P inOBU represents the predicted received power of the downlink signal, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Represents the diversity gain of the receiving antenna of the roadside unit; For each uplink signal transmission position, the predicted received power of the downlink signal from each roadside unit is counted as the test result of the roadside unit power coverage at the uplink signal transmission position; Determine the target roadside unit to be adjusted according to the test results of the roadside unit power coverage at different uplink signal transmission positions; According to the wireless environment and communication requirements, a power tuning instruction is sent to each of the target roadside units, so that each of the target roadside units tunes the transmission power based on the power tuning instruction to reduce the probability that the on-board unit at the same location simultaneously receives downlink signals from multiple roadside units.

5. The method according to claim 4, characterized in that The step of calculating, for each uplink received power sent by each roadside unit, a predicted received power of a downlink signal from the roadside unit received at an uplink signal transmission position corresponding to the uplink received power based on the principle that path losses of uplink signals and downlink signals in the same frequency band are equal, comprises: Based on the principle that the path loss of uplink and downlink signals in the same frequency band is equal, the equation relationship between the uplink received power, the transmit power of the onboard unit, the transmit power of the roadside unit, the gain of the onboard unit's receive antenna and transmit antenna, the gain of the roadside unit's receive antenna and transmit antenna, and the predicted receive power of the downlink signal is calculated; For each uplink receiving power sent by each roadside unit, based on the preset transmission power of the vehicle-mounted unit, the transmission power of the roadside unit, the gain of the receiving antenna and the transmitting antenna of the vehicle-mounted unit, the gain of the receiving antenna and the transmitting antenna of the roadside unit, and the equation relationship, the predicted receiving power of the downlink signal from the roadside unit received at the uplink signal transmission position corresponding to the uplink receiving power is calculated.

6. The method according to claim 5, characterized in that The equation relationship is: P inOBU =P outRSU -P outOBU +P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU Among them, P inOBU represents the predicted received power of the downlink signal, P outRSU Represents the transmission power of the roadside unit, P outOBU Indicates the transmission power of the vehicle-mounted unit, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Indicates the diversity gain of the roadside unit's receiving antenna.

7. A test device for power coverage of a roadside unit, characterized in that: A service platform applied to a test system for roadside unit power coverage according to claim 1, the device comprising: A receiving module, used for receiving uplink receiving powers sent by multiple roadside units and uplink signal transmission positions corresponding to each uplink receiving power; wherein the uplink receiving power and the uplink signal transmission position are determined after the roadside unit receives uplink signals sent by multiple vehicle-mounted units, wherein the uplink signals are sent by the user-level vehicle to the roadside unit through the vehicle-mounted unit during driving; The calculation module is used to calculate the predicted received power of the downlink signal from the roadside unit at the uplink signal transmission position corresponding to the uplink received power for each uplink received power sent by each roadside unit based on the principle that the path loss of the uplink signal and the downlink signal in the same frequency band are equal, and the predicted received power is calculated based on the following formula: P inOBU =P inRSU +H aRSU +H aOBU +H dOBU -G aRSU -G aOBU -G dRSU ; Among them, P inOBU represents the predicted received power of the downlink signal, P inRSU Indicates the uplink received power, H aRSU Represents the gain of the transmitting antenna of the roadside unit, H aOBU Represents the gain of the receiving antenna of the vehicle-mounted unit, H dOBU represents the diversity gain of the receiving antenna of the vehicle-mounted unit, G aRSU represents the gain of the receiving antenna of the roadside unit, G aOBU Represents the gain of the transmitting antenna of the vehicle-mounted unit, G dRSU Represents the diversity gain of the receiving antenna of the roadside unit; A statistical module, for counting the predicted received power of downlink signals from each roadside unit for each uplink signal transmission position as a test result of the roadside unit power coverage at the uplink signal transmission position; The tuning module is used to determine the target roadside unit to be adjusted according to the test results of the power coverage of the roadside unit at different uplink signal transmission positions; according to the wireless environment and communication requirements, send a power tuning instruction to each of the target roadside units, so that each of the target roadside units adjusts the transmission power based on the power tuning instruction, so as to reduce the probability that the on-board unit at the same position simultaneously receives the downlink signals of multiple roadside units.

8. A service platform, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, for implementing the method steps described in any one of claims 4 to 6 when executing a program stored in a memory.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method steps described in any one of claims 4 to 6 are implemented.

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