KR20200095149A - Roadside unit location design and fault unit detection apparatus, and roadside unit location design and fault unit detection method - Google Patents

Abstract

The present invention proposes a location design and fault unit detection apparatus of a roadside unit, and a location design and fault unit detection method of a roadside unit, which calculate the optimal installation location of a roadside unit around the road and detect fault unit in order to provide a smooth and reliably vehicle-to-everything (V2X) communication service. According to the present invention, the proposed apparatus comprises: a wireless channel modeling portion which designs a measurement scenario in consideration of a road environment at the site where a roadside unit is to be installed, and measures and models the communication performance between the product of a standard roadside unit to be installed and a vehicle; a location design portion which designs an optimal location of the roadside unit to be installed based on the modeling results in the wireless channel modeling portion, characteristics of the vehicle passing on the road, and the shape of the road; and a monitoring portion which monitors the communication quality of the roadside unit in the process of installing and operating the roadside unit according to the design of the location design portion and detects a roadside unit which is less than the standard quality.

Description

The location design of a roadside base station and a bad base station detection apparatus, and a location design and a bad base station detection method of the roadside base station TECHNICAL FIELD The roadside unit location design and fault unit detection apparatus and roadside unit location design and fault unit detection method

The present invention relates to a location design of a roadside base station and a bad base station detection apparatus, and a location design of a roadside base station and a method of detecting a bad base station, and more particularly, a location design of a roadside base station for vehicle data communication and service provision and detection of a bad base station The present invention relates to an apparatus and a method for designing a location of a roadside base station and detecting a bad base station.

Various services can be provided to a vehicle in motion through wireless communication between a vehicle and a roadside base station. Here, various services may include collecting road information, providing real-time road hazard information, providing traffic information, and providing road weather information.

However, in order to provide various services to a running vehicle, communication quality must be guaranteed, and a roadside base station must be installed in the right place.

Accordingly, there is a need for a technique to ensure the communication quality required for service provision and to balance the cost required for building a roadside base station.

Prior Art 1: Korean Patent Registration No. 10-1615970 (A system and method for providing road construction section traffic information using a roadside device and vehicle terminal based on dedicated road traffic communication) Prior Art 2: Korean Patent Registration No. 10-1739235 (Method for generating error correction data for V2X-based vehicle satellite navigation signals, roadside device and policy server) Prior Art 3: Korean Patent Registration No. 10-1898611 (Hybrid vehicle mounting device and roadside base station supporting WAVE-V2X and C-V2X) Prior Art 4: Korean Patent Application Publication No. 10-2018-0040620 (base station, wireless terminal, and their method)

The present invention has been proposed to solve the above-described conventional problem, and to calculate the optimal installation location of roadside base stations around roads and detect bad roadside base stations in order to provide smooth and reliable V2X vehicle-to-vehicle communication service. An object of the present invention is to provide an apparatus for designing a location of a roadside base station and detecting a bad base station, and a method for designing a location of a roadside base station and detecting a bad base station.

In order to achieve the above object, the apparatus for designing the location of a roadside base station and detecting a bad base station according to a preferred embodiment of the present invention designs a measurement scenario in consideration of the road environment at the place where the roadside base station is to be installed, and the reference roadside base station to be installed. A wireless channel modeling unit measuring and modeling communication performance between a product and a vehicle; A location designing unit for designing an optimal location of a roadside base station to be installed based on a modeling result in the radio channel modeling unit, characteristics of a vehicle passing on a road, and a shape of a road; And a monitoring unit that monitors the communication quality of the roadside base station and detects a roadside base station that is less than the reference quality in the process of installing and operating the roadside base station according to the design of the location design unit.

The measurement scenario is a situation in which the line-of-sight (LOS) between the roadside base station and the test vehicle is secured, and there is an interference difference between the roadside base station and the test vehicle, so that the non-line-of-sight (NLOS) It may include a situation in which there is a building between the roadside base station and the test vehicle, and a situation in which there is a non line-of-sight (NLOS).

The radio channel modeling unit operates the test vehicle to provide a packet reception sensitivity (RSSI, Received Signal Strength Indicator), and a packet error rate (PER) according to a distance between the roadside base station (RSU) and the test vehicle. , Channel noise, and signal to noise ratio (SNR) can be measured.

The location design unit divides the roadside base station installation planned road by cell unit, assigns properties to each cell, selects a roadside base station installation area to be installed essential, and between the selected roadside base station area and neighboring cells. It is possible to determine a radio channel model to be applied in communication and calculate the coverage of the roadside base station.

The monitoring unit monitors communication data between the roadside base station and the vehicle while the roadside base station is installed and operated, updates a channel model of communication between the roadside base station and the cell with the monitored data, and communicates between the updated roadside base station and the cell. The communication coverage of the corresponding roadside base station is calculated with the channel model of, and roadside base stations in an area where the reference performance required by the V2X service is insufficient can be found based on the calculated communication coverage.

Meanwhile, in the method for designing the location of a roadside base station and detecting a bad base station according to a preferred embodiment of the present invention, the radio channel modeling unit designs a measurement scenario in consideration of the road environment at the site where the roadside base station is to be installed, and Measuring and modeling communication performance between the product and the vehicle; Designing an optimal location of a roadside base station to be installed based on a vehicle characteristic and a road shape through a modeling result in the modeling step and a road; And a monitoring unit, monitoring the communication quality of the roadside base station in the process of installing and operating the roadside base station according to the design in the designing step and detecting a roadside base station that is less than the reference quality.

According to the present invention of this configuration, when designing the installation location of the roadside base station (RSU), the minimum communication quality requirements required by the V2X service in consideration of the geometry of the road to be installed, the vehicle model, and the communication quality requirements of the V2X service. By designing an installation location of an appropriate roadside base station that satisfies the requirements of the roadside base station and monitoring the communication quality in the operation process after the installation of the roadside base station, it is possible to detect a roadside base station that does not meet the V2X service requirement quality.

1 is a block diagram of an apparatus for designing a location of a roadside base station and detecting a bad base station according to an embodiment of the present invention.
FIG. 2 is a diagram employed to explain the operation of the radio channel modeling unit shown in FIG. 1.
3 is a flowchart for explaining operations of a radio channel modeling unit and a location designing unit shown in FIG. 1.
4A to 4D are exemplary views employed in the description of FIG. 3.
FIG. 5 is a flowchart illustrating a process of selecting a channel model to be applied for each road to be installed shown in FIG. 3 in more detail.
6 is an exemplary view employed in the description of FIG. 5.
7 is a flowchart for explaining the operation of the monitoring unit shown in FIG. 1.
8 is a flowchart illustrating a method for designing a location of a roadside base station and detecting a bad base station according to an embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, in order to facilitate an overall understanding, the same reference numerals are used for the same elements in the drawings, and duplicate descriptions for the same elements are omitted.

1 is a configuration diagram of an apparatus for designing a location of a roadside base station and detecting a bad base station according to an embodiment of the present invention, and FIG. 2 is a diagram employed to explain the operation of a radio channel modeling unit shown in FIG. 1, and FIG. It is a flowchart for explaining the operation of the wireless channel modeling unit and the location design unit shown in 1, Figs. 4A to 4D are exemplary views employed in the description of Fig. 3, and Fig. 5 is applied for each installation target road shown in Fig. 3 It is a flowchart for explaining the process of selecting a channel model to be performed in more detail, FIG. 6 is an exemplary diagram employed in the description of FIG. 5, and FIG. 7 is a flowchart for explaining the operation of the monitoring unit shown in FIG. 1.

An apparatus for designing a location of a roadside base station and detecting a bad base station according to an embodiment of the present invention may include a radio channel modeling unit 10, a location designing unit 20, and a monitoring unit 30.

The wireless channel modeling unit 10 derives a communication baseline model for wireless communication between the roadside base station and the vehicle.

That is, the wireless channel modeling unit 10 models the wireless channel by using the road geometry of the road to which the roadside base station (RSU) is installed based on the baseline model of communication between the roadside base station and the vehicle, and utilizes the characteristics of the passing vehicle. Thus, the wireless channel can be modeled, and the wireless channel can be modeled in consideration of installation structures around the road.

In other words, the wireless channel modeling unit 10 may design a measurement scenario in consideration of a road environment at a location where the roadside base station is to be installed, measure the communication performance between the product of the reference roadside base station to be installed and the vehicle, and model it. To this end, the radio channel modeling unit 10 performs radio communication channel modeling after selecting a roadside base station (RSU) to be modeled, selecting a vehicle type, and selecting a test environment.

More specifically, the radio channel modeling unit 10 operates the test vehicle to provide a packet reception sensitivity (RSSI, Received Signal Strength Indicator), and a packet error rate (PER,) according to the distance between the roadside base station (RSU) and the test vehicle. Packet error rate), channel noise, and signal to noise ratio (SNR) are measured. The wireless channel modeling unit 10 may repeat the test to derive a communication baseline model representing communication quality according to distance.

The measurement scenario in the measurement of the communication baseline model for wireless communication between the roadside base station (RSU) and the test vehicle (vehicle) described above is the visibility distance (LOS) between the roadside base station 1 and the test vehicle 2 as shown in FIG. , Line-of-sight) is secured, and an obstacle such as an obstruction vehicle (3) exists between the roadside base station (1) and the test vehicle (2), which is a non-line-of-sight (NLOS). It may include a situation, and a situation in which an obstacle such as a building 4 exists between the roadside base station 1 and the test vehicle 2 and is a non line-of-sight (NLOS).

The wireless channel modeling unit 10 derives a communication baseline model in consideration of the above test conditions.

The location design unit 20 designs an optimal location of a roadside base station to be installed based on the modeling result in the wireless channel modeling unit 10, vehicle characteristics, and road shape through the road.

For example, the location design unit 20 divides the roadside base station installation planned roads into cells, assigns properties to each cell, selects an installation area for the roadside base station that must be installed, and The radio channel model to be applied in the communication between the region and the neighboring cells is determined, and the coverage of the corresponding roadside base station is calculated.

The operations of the radio channel modeling unit 10 and the location designing unit 20 will be described in more detail with reference to FIG. 3.

First, the radio channel modeling unit 10 establishes a baseline model of communication between the roadside base station and the vehicle (S10). That is, the radio channel modeling unit 10 measures a basic performance model for a reception strength versus distance and a packet reception rate versus distance for modeling a communication channel between a roadside base station and a vehicle in a predetermined scenario. At this time, the wireless channel modeling unit 10 is, for example, a model of reception strength/packet reception rate versus distance in LOS (Line-of-Sight), and reception strength/packet reception rate versus distance in NLOS (Non-Line of Sight) due to large vehicles. In the NLOS (Non-Line of Sight) due to the model and building, the reception strength/packet reception ratio model versus distance is measured.

And, the wireless channel modeling unit 10 checks the location of the roadside base station installation candidate site for each road to be installed based on the measured basic performance models, and then investigates the road geometry and traffic model of the roadside base station installation target road, and is based on this. The wireless channel is modeled (S12). For example, using a GIS system or on-site measurement of the roadside base station installation plan, the road width, the number of lanes, and the current status of building construction along the roadside (e.g., buildings, tunnels, bridges, overpasses, soundproof walls, median strips) Etc.). In addition, it is possible to investigate the traffic volume of interfering vehicles such as buses and trucks (eg, bus/truck traffic per hour, whether or not there is a dedicated bus lane, etc.) through field surveys of roadside base stations and related data analysis.

Accordingly, the wireless channel modeling unit 10 may design a plan for providing V2X services to cities and specific roads. The services provided for each road will vary depending on the characteristics of each road, related organizations, and vehicles. For example, in the case of a certain section of Gangnam-daero and Teheran-ro, a V2X-based traffic light present service is provided as a service, and a packet transmission error within a 300m radius of a communication intersection can be designed to have a V2X service request quality of less than 10%. On the other hand, in the case of the Banpo IC-Yangjae IC section of the Gyeongbu Expressway, the V2X-based real-time traffic information provision is provided as a service, and the V2X service request quality of less than 20% of the packet transmission error of the entire section can be designed.

Thereafter, the location design unit 20 separates the entire range (ie, the road to be installed) in which the roadside base station is to be installed based on the result of the radio channel modeling unit 10 in cell units (S14). Here, each cell may be divided into various shapes such as polygons and circles. For example, the location design unit 20 selects an area in which a roadside base station is to be installed as shown in FIG. 4A, and then separates roadside base station installation target roads in cell units as shown in FIG. 4B. Roadside base station installation target roads may include a highway (5), a general road (6), and the like. In FIG. 4A, V2X/C-ITS services to be provided are determined according to the ITS promotion plan, and the city/gu/dong unit or the road unit area in which the corresponding service is to be provided is selected. In FIG. 4B, a road for installing a roadside base station for providing a service in a planned area is selected, and a cell for applying a channel model is classified.

When the area where the roadside base station is to be installed for V2X service is divided by cell units, each cell is assigned a unique ID (eg, K-01, G-02, etc.) that can identify the cell. As for the size of the cell, it is recommended that the lanes of the road can be distinguished (around 3m), and there are no restrictions on the size. At this time, each cell is provided with a service (e.g., N/A, V2X-based traffic light display service, etc.), an allowable packet error rate (e.g., 10%, 100%, etc.), and traffic vehicle properties (e.g., Normal, Tall_vehicle, etc.) are given.

Then, the location design unit 20 selects an essential local base station location (S16). In this case, an initial roadside base station location is selected around an area in which the V2X service is essential, such as signal information service and road information providing service. For example, as shown in FIG. 4C, a roadside base station location 7 to be installed is initially selected. In FIG. 4C, the communication coverage of the roadside base station may be calculated by applying a communication channel model between each cell and a roadside base station selected as an essential installation area.

Thereafter, the location design unit 20 selects a radio channel model to be applied to neighboring cells targeting areas selected as essential area base station locations (S18). Here, in the case of selecting a radio channel model, the radio channel model selection method using the LOS and NLOS characteristics described above may be applied.

Then, the location design unit 20 calculates a communication coverage value (packet loss rate, RSSI, etc.) of the cell through the radio channel model selected for each cell (S20).

Subsequently, the location design unit 20 calculates a cell that satisfies the communication coverage reference quality among all cells as effective communication coverage. For example, an effective communication coverage cell satisfying a PER of less than 10% and an RSSI of 94 or more may be determined as the effective communication coverage.

Thereafter, the location design unit 20 determines whether all cells included in the road to be installed satisfy the effective communication coverage condition (S22).

If all cells satisfy the effective communication coverage, it ends.

Conversely, if all cells do not satisfy the effective communication coverage condition, the location design unit 20 performs an additional base station location selection step according to the service weight (S24). In the case of selecting the location of an additional roadside base station according to the service weight, priority is determined by each V2X and C-ITS service (providing traffic information, providing weather information, providing construction information, etc.).

Then, the location design unit 20 selects a radio channel model to be applied to neighboring cells as a communication range target of the additionally selected roadside base station (S26), and the communication coverage of the cell through the determined channel model selected for each cell. A value (packet loss rate, RSSI, etc.) is calculated (S28). Here, the wireless channel model selection method using the LOS and NLOS characteristics described above may be applied.

Subsequently, the location design unit 20 updates the effective communication coverage for cells that satisfy the communication coverage reference quality by reflecting the added roadside base station coverage among all cells. For example, as shown in FIG. 4D, the added roadside base station location 8 may be selected. In FIG. 4D, a minimum additional roadside base station location that satisfies the minimum communication quality is designed to select an additional roadside base station installation location for a currently uncovered road. In this case, an effective communication coverage cell satisfying a PER of less than 10% and an RSSI of 94 or more may be determined as the effective communication coverage.

Then, the location design unit 20 determines whether all cells included in the road to be installed satisfy the effective communication coverage condition (S30).

If all cells satisfy the effective communication coverage, it ends.

Conversely, if all cells do not satisfy the effective communication coverage condition, the location design unit 20 selects an additional roadside base station location by applying a function that minimizes the number of roadside base stations according to the service weight (S32). In step S32, an additional roadside base station is selected by applying a function capable of covering all cells that do not belong to the effective communication coverage among roads to be covered by all roadside base stations and minimizing the number of roadside base stations.

Meanwhile, in the operation description of the location design unit 20 described above, the step (S18) of selecting a channel model to be applied for each cell of the road to be installed will be described in more detail with reference to FIGS. 5 and 6 as follows.

First, the location design unit 20 selects a list of candidate cells included in the maximum transmission distance of the roadside base station and simultaneously included in the road area as shown in FIG. 6 (S40). In FIG. 6, a dotted line in the center may mean a road center line, and a solid line displayed above and below the road center line may mean both sides of the road (one side and the other side).

Then, the location design unit 20 calculates the linear distance between the roadside base station 1 and each cell, and arranges the distances in the order of shortening (S42).

Thereafter, the location design unit 20 selects a cell having the shortest distance between the roadside base station and the cell from among the cells for which the channel model with the roadside base station 1 is not selected from the list of candidate cells (S44).

Then, the location design unit 20 searches for a path cell that may affect communication between the roadside base station 1 and the cell (S46). In this case, the location design unit 20 may select a cell in which the roadside base station 1 and the straight line connecting the cell intersect, as the path cell.

Thereafter, the location design unit 20 calculates the NLOS attribute value of the selected path cell (S48). Here, the NLOS attribute value is used to predict the communication quality of the current cell by quantifying radio wave interference factors caused by structures and interfering vehicles located in the path cell.

As an embodiment of calculating the NLOS attribute value due to a path cell, each path cell has an NLOS attribute value according to an obstruction factor, and the NLOS attribute value due to the structure is the NLOS (structure) attribute value, and the NLOS attribute value due to the traffic volume is NLOS. It can be defined as the (traffic) attribute value. In an embodiment of the present invention, the maximum value of each NLOS attribute value of a path cell may be used as the NLOS attribute value of a corresponding cell.

Accordingly, "NLOS (structure) attribute value = maximum value of the structure attribute values of cells in contact with a straight line connecting the antenna of the roadside base station and the current structure center", and "NLOS (traffic volume) attribute value = antenna of the roadside base station And the maximum value of the traffic volume attribute values of cells in contact with the straight line connecting the center of the current structure.

Thereafter, the location design unit 20 selects a channel model to be applied by determining whether the NLOS attribute value exceeds the reference value (S50). In this case, if the reference value of all NLOS attribute values is not reached, the channel model is applied as LOS. If the NLOS attribute values exceed the reference value, the corresponding NLOS model is applied, and when a number of NLOS attribute values exceed the reference value, the maximum value among them is used.

Finally, the location design unit 20 determines whether a channel model undecided cell exists in the candidate cell list (S52), and if there is a channel model undecided cell in the candidate cell list, returns to the above-described step S44 and repeats from the step, Conversely, when the channel models of all cells are determined, the procedure ends.

In FIG. 1, the monitoring unit 30 monitors the communication quality of the roadside base station and detects a roadside base station that is less than the reference quality in the process of installing and operating the roadside base station according to the design of the location design unit 20.

That is, the monitoring unit 30 monitors the communication data between the roadside base station and the vehicle while the roadside base station is operating, updates the channel model of the roadside base station-cell communication with the monitored data, and performs the updated roadside base station-cell communication. The communication coverage of the roadside base station is calculated using the channel model, and based on the calculated communication coverage, the roadside base station in the area where the standard performance required by the V2X service is not achieved is detected (find out).

The operation of the monitoring unit 30 will be described in more detail with reference to FIG. 7.

First, the monitoring unit 30 collects (always) packet reception sensitivity and packet reception rate by vehicle type and base station (S60).

Subsequently, the monitoring unit 30 compares the channel model calculation result for each road and the actual measurement collection result (S62).

Then, the monitoring unit 30 reinforces the channel model by using the measured data (S64).

Thereafter, the monitoring unit 30 updates the channel model of each cell according to the changed channel model, and updates the base station effective coverage (S66).

Then, the monitoring unit 30 checks whether there is a cell whose communication coverage is lower than the reference quality (S68).

If there is a cell whose communication coverage is lower than the reference quality, the monitoring unit 30 detects (consides) the roadside base station of the cell as a bad base station (S70). If necessary, the monitoring unit 30 may notify the existence of a cell that has not achieved the reference quality.

8 is a flowchart illustrating a method for designing a location of a roadside base station and detecting a bad base station according to an embodiment of the present invention.

First, the radio channel modeling unit 10 establishes a baseline model of communication between the roadside base station and the vehicle (S100). In other words, the radio channel modeling unit 10 operates the test vehicle to provide a packet reception sensitivity (RSSI, Received Signal Strength Indicator) and a packet error rate (PER, Packet Error) according to the distance between the roadside base station (RSU) and the test vehicle. Rate), etc. The radio channel modeling unit 10 calculates a communication baseline model representing communication quality according to distance by repeating the test.

Thereafter, the location design unit 20 designs an optimal location of the roadside base station to be installed based on the communication baseline model in the radio channel modeling unit 10 (S110). Here, a more detailed description of the operation of the position design unit 20 has already been described based on FIGS. 3 to 6.

Then, the monitoring unit 30 monitors the communication quality of the roadside base station while the roadside base station is installed and operated according to the design of the location design unit 20 and detects a roadside base station that is less than the reference quality (S120). ). Here, a more detailed description of the operation of the monitoring unit 30 has already been described based on FIG. 7.

As described above, an optimal embodiment has been disclosed in the drawings and specifications. Although specific terms have been used herein, these are only used for the purpose of describing the present invention and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.

10: wireless channel modeling unit
20: Location design department
30: monitoring unit

Claims (12)

A wireless channel modeling unit for designing a measurement scenario in consideration of a road environment at a location where a roadside base station is to be installed, and measuring and modeling communication performance between a product of a reference roadside base station to be installed and a vehicle;
A location designing unit for designing an optimal location of a roadside base station to be installed based on a modeling result in the radio channel modeling unit, characteristics of a vehicle passing on a road, and a shape of a road; And
And a monitoring unit that monitors the communication quality of the roadside base station and detects a roadside base station that is less than the reference quality in the process of installing and operating the roadside base station according to the design of the location design unit. Location design and bad base station detection device. The method according to claim 1,
The measurement scenario is,
The situation where the line-of-sight (LOS) is secured between the roadside base station and the test vehicle, the situation where there is an obstruction difference between the roadside base station and the test vehicle, and the situation is non-line-of-sight (NLOS), and the roadside An apparatus for designing a location of a roadside base station and detecting a bad base station, characterized in that it includes a situation where a building exists between the base station and the test vehicle and is non-line-of-sight (NLOS). The method according to claim 2,
The radio channel modeling unit,
An apparatus for designing a location of a roadside base station and detecting a bad base station, characterized in that the test vehicle is operated to measure one or more measurement elements according to a distance between the roadside base station (RSU) and the test vehicle. The method according to claim 3,
The one or more measurement elements,
A roadside base station comprising at least one of packet reception sensitivity (RSSI, Received Signal Strength Indicator), packet error rate (PER), channel noise, and signal to noise ratio (SNR). Location design and bad base station detection device. The method according to claim 1,
The location design unit,
By dividing the roadside base station installation planned road by cell unit, assigning properties to each cell, selecting a roadside base station installation area to be installed essential, and radio to be applied in communication between the selected roadside base station area and neighboring cells. An apparatus for designing a location of a roadside base station and detecting a bad base station, characterized in that the channel model is determined and the coverage of the corresponding roadside base station is calculated. The method according to claim 1,
The monitoring unit,
While the roadside base station is installed and operated, communication data between the roadside base station and the vehicle is monitored, the channel model of the roadside base station and the cell communication is updated with the monitored data, and the updated channel model of the roadside base station and the cell communication is used. A location design and bad base station detection apparatus for a roadside base station, characterized in that it calculates the communication coverage of a corresponding roadside base station, and finds a roadside base station in an area where the reference performance required by the V2X service is insufficient based on the calculated communication coverage. Designing a measurement scenario in consideration of a road environment at a location where the roadside base station is to be installed, and measuring and modeling communication performance between a product of a reference roadside base station to be installed and a vehicle;
Designing an optimal location of a roadside base station to be installed based on a vehicle characteristic and a road shape through a modeling result in the modeling step and a road; And
And detecting, by the monitoring unit, the communication quality of the roadside base station while the roadside base station is installed and operated according to the design in the designing step and detects a roadside base station that is less than the reference quality. Roadside base station location design and bad base station detection method. The method according to claim 7,
The measurement scenario is,
The situation where the line-of-sight (LOS) is secured between the roadside base station and the test vehicle, the situation where there is an obstruction difference between the roadside base station and the test vehicle, and the situation is non-line-of-sight (NLOS), and the roadside A method for designing a location of a roadside base station and detecting a bad base station, characterized in that it includes a situation in which a building exists between the base station and the test vehicle and is non-line-of-sight (NLOS). The method according to claim 8,
The modeling step,
And measuring one or more measurement elements according to a distance between the roadside base station (RSU) and the test vehicle by operating the test vehicle. The method according to claim 9,
The one or more measurement elements,
A roadside base station comprising at least one of packet reception sensitivity (RSSI, Received Signal Strength Indicator), packet error rate (PER), channel noise, and signal to noise ratio (SNR). Location design and bad base station detection method. The method according to claim 7,
The designing step,
By dividing the roadside base station installation planned road by cell unit, assigning properties to each cell, selecting a roadside base station installation area to be installed essential, and radio to be applied in communication between the selected roadside base station area and neighboring cells. Determining a channel model and calculating the coverage of a corresponding roadside base station; and a method for designing a location of a roadside base station and detecting a bad base station. The method according to claim 7,
The step of detecting,
While the roadside base station is installed and operated, communication data between the roadside base station and the vehicle is monitored, the channel model of the roadside base station and the cell communication is updated with the monitored data, and the updated channel model of the roadside base station and the cell communication is used. Calculating the communication coverage of the roadside base station, and finding a roadside base station in an area where the reference performance required by the V2X service is insufficient based on the calculated communication coverage; and a method for designing a location of a roadside base station and detecting a bad base station, comprising: .

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