KR102184507B1 - The apparatus of hybrid v2x roadside wquipment using internal multi-communication bus and medium protocol stack connection layer archtecture - Google Patents

Abstract

The present invention relates to a hybrid V2X roadside base station apparatus, which provides a physical interface and bus structure to connect modems to be added in the future by reflecting a physical extension interface structure capable of extending a communication modem according to the addition or change of a wireless communication modem unit according to a change in a communication method to the communication main control unit, and enables reuse of existing V2X roadside stations by simply installing a device driver of the modem and the linking software for an interface with the driver.

Description

Hybrid V2X roadside base station device using multiple internal communication interface bus and protocol connection layer structure {THE APPARATUS OF HYBRID V2X ROADSIDE WQUIPMENT USING INTERNAL MULTI-COMMUNICATION BUS AND MEDIUM PROTOCOL STACK CONNECTION LAYER ARCHTECTURE}

The present invention is a communication device for servicing one or more communication methods including WAVE and C-V2X through a single roadside base station in configuring a roadside base station for V2X communication, which is a core communication technology constituting an autonomous vehicle and an advanced transportation system. It relates to an apparatus comprising an interface structure and control software,

In more detail, by reflecting the physical extension interface structure that allows expansion of the corresponding communication modem according to the addition and change of the wireless communication modem unit in accordance with the change of the communication method, the physical interface to connect the modem to be added in the future and It relates to a hybrid V2X roadside station apparatus that provides a bus structure and allows the existing V2X roadside station to be reused simply by installing a device driver of the modem and linking software for the interface with the driver.

As various services are developed through advanced transportation systems and the era of autonomous vehicles approaches, rapid technology development for vehicle-to-vehicle communication is in progress.

V2X communication is a technology that collectively refers to V2V (Vehicle to Vehicle) and V2I (Vehicle to Infra) communication, and is the latest communication technology featuring fast access time and vehicle-to-vehicle communication.

For this V2X communication, the IEEE 802.11P-based WAVE communication method completed standardization in 2012 and is entering the commercialization stage, and the cellular communication-based C-V2X method is also undergoing its own standardization and hastening commercialization.

In addition, the C-V2X is internally standardizing two communication methods, such as LTE-based and 5G-based C-V2X.

The WAVE communication method and the cellular communication method have a problem in that they are not compatible with each other because the physical frequency modulation and demodulation method is different and the lower protocol is different. However, 3GPP, which is leading the standard of Cellular V2X, asserts that the protocol of the upper network layer will comply with the IEEE 1609 standard of WAVE.

The rapid development of communication technology increases the possibility of high investment due to the provision of multiple communication services and short communication system change cycles, and a situation where the decision of the standardization method is delayed in overseas and domestic as well, so the possibility of applying different communication methods step by step is increasing.

Recently, a hybrid roadside base station that supports multiple communications by simultaneously installing standardized WAVE-based V2X modems and some C-V2X modems is being developed, but it can accommodate various types of modems with a product structure dependent on a specific model. It does not suggest a possible system structure.

In addition, since the interface standard with the main control unit of the modem to be developed in the future is not standardized and can be developed in various forms, an extension plan must be prepared for this interface.

Accordingly, there is a need for a technology method that minimizes the burden of replacing and changing roadside base stations due to the change of the communication method of V2X, and can accommodate various communication methods with only minimal modem and some software changes.

Registered patent 10-1898611 (Registration date 2018.09.07)

In order to solve the problems of the prior art, the present invention reflects the physical extension interface structure capable of extending the communication modem according to the addition and change of the wireless communication modem according to the change of the communication method to the communication main control unit, which will be added in the future. A hybrid V2X roadside base station that provides a physical interface and bus structure to connect a modem, and allows the existing V2X roadside station to be reused simply by installing the device driver of the modem and the linkage software for the interface with the driver. It is an object of the invention to provide an apparatus.

To achieve the above object,

The present invention configures a multi-bus interface capable of connecting one or more V2X communication modems to a V2X roadside base station main control unit (Main CPU Module),

By configuring a protocol connection layer between the multi-bus interface and IEEE 1609, which is a V2X standard protocol stack, protocol and message processing for an additional communication method is extended on the protocol connection layer so that the upper protocol layer and application service can be used without change. It provides a hybrid V2X roadside base station apparatus using a structured, multiple internal communication interface bus and protocol connection layer structure.

More specifically,

A main control unit that reads and decodes program instructions and data from the main memory to perform arithmetic and logic operations or data processing;

The main board of the roadside base station, which is located in the internal space of the roadside base station, plays an intermediate role of transferring data between devices,

A power module located on one side of the main board of the roadside base station to supply 5V to 24V power to each device;

An infrastructure communication module that is connected to a central management server located in a remote location through a wired/wireless communication network and transmits and receives data to and from a control center or other infrastructure device,

A V2X modem unit that performs physical RF wireless communication,

A modem expansion slot for V2X modem connection to perform V2X wireless communication,

A GNSS module unit to generate current coordinates and time synchronization signals,

It is composed of the logic interface stack layer software that connects the V2X protocol stack represented by IEEE 1609.x and the physical layer for each V2X modem.

UART(Universal Asynchronous Receiver/Transmitter), USB(Universal Serial Bus), ETHERNET, I2C(Inter-Integrated Circuit), CAN(Controller Area Network), GPIO(General Purpose Input/Output), RS-232 or RS-485 By selecting one of the included communication methods to configure the platform internal bus, which is a multi-bus interface, and by providing two or more slots for connecting the V2X modem using the platform internal bus, , It is configured to extend the added modem on the main control unit,

By configuring a protocol connection layer between the Platform Internal Bus and IEEE 1609, which is a V2X standard protocol stack, the protocol and message processing for the additional communication method is extended on the protocol connection layer to provide higher protocol layers and application services. It provides a hybrid V2X roadside base station device that uses multiple internal communication interface buses and protocol connection layer structures that are configured to be used without modification.

The hybrid V2X roadside base station apparatus using a multiple internal communication interface bus and protocol connection layer structure according to the present invention has the following effects.

In configuring the roadside base station device for V2X communication, by providing a physical interface and software structure to connect various communication methods of V2X modems in the future, the cost of replacing or changing equipment according to the change of communication method is reduced, and service continuity is stable. It has the advantage of being able to provide.

More specifically, by installing and replacing a simple modem module and installing software in the roadside base station according to the present invention, it is possible to change and expand the communication method, and through this, it is possible to reuse the existing controller to increase service stability and continuity. It can be improved, the system replacement cost according to the communication method change can be reduced by 90% or more, and as the performance of the modem is improved, the modem with the improved performance can be replaced in a short time on the field, resulting in improved service.

If you look at it in more detail, it is as follows.

first. Excellent scalability and stability. In other words, by changing the structure of the control unit configured exclusively according to the existing modem to a structure that can be expanded to a universally expandable structure, communication of the roadside base station by changing only the other modem unit to the conventional method without changing other devices such as the main control unit, power supply unit, and external interface unit Since the service method can be extended, it has excellent expandability according to service conversion and change, and service stability can be maintained by using the functions of the previously verified main control unit.

second. Excellent economics. In other words, by reusing most of the configuration of the existing roadside base stations and by changing only the software part of the modem interface function to the additional communication mode modem, it is possible to expand the communication method, thereby reducing other costs by 90% or more for expansion and change of communication method. have.

third. Excellent compatibility and functionality. In other words, it is possible to physically connect various types of modems to be developed and supplied in the future without changing the hardware by providing a system bus with five industrial interface standards generally provided by communication devices and physical interfaces. By adopting it, the convenience of system change and expansion can be maximized.

1 is a block diagram of a V2X roadside base station for multi-V2X modem expansion according to the present invention
Figure 2 is a diagram of a protocol layer configuration for multi-V2X modem extension according to the present invention.
Figure 3 is an exemplary configuration of the hardware of the V2X roadside base station according to the present invention.
Figure 4 is a configuration diagram of a method for connecting an additional modem service to the V2X roadside base station protocol stack according to the present invention.

Hereinafter, a detailed description of the technical configuration according to the present invention will be described in detail together with the drawings.

In the present invention, in constructing a roadside base station for V2X communication, which is a core communication technology that constitutes an autonomous vehicle and a high-tech transportation system, a hybrid V2X roadside base station device for servicing one or more communication methods such as WAVE and C-V2X through a single roadside base station. As for,

It configures a multi-bus interface that can connect one or more V2X communication modems to the main CPU module of the V2X roadside base station,

By configuring a protocol connection layer between the multi-bus interface and IEEE 1609, which is a V2X standard protocol stack, protocol and message processing for an additional communication method is extended on the protocol connection layer so that the upper protocol layer and application service can be used without change. It is a technical feature that is configured.

Since the interface method of the modem to be added in the future is not standardized, various types of modems can be developed. Therefore, in order to connect modems of various interface types in the existing V2X roadside base station main control unit, a communication method and a bus structure capable of responding to each modem interface must be provided.

To this end, the present invention provides five communication methods including UART, USB, ETHERNET, I2C, and CAN, which are widely used as industry standard interfaces, and a bus structure including a power supply capable of supplying power to the device. It provides extensibility to connect modems with type interface method.

More specifically,

1 to 4,

Hybrid V2X roadside base station apparatus according to the present invention,

A main control unit 10 that reads and decodes program instructions and data from the main memory to execute arithmetic and logic operations or data processing; and

The roadside base station main board unit 20, which is located in the internal space of the roadside base station and plays an intermediate role in data transmission between the devices,

A power module 30 that is located on one side of the roadside base station main board unit 20 and supplies 5V to 24V power to each device,

An infrastructure communication module 40 that is connected to a central management server located in a remote location through a wired/wireless communication network and transmits and receives data to and from a control center or other infrastructure device,

A V2X modem unit 50 performing physical RF wireless communication,

A modem expansion slot 60 for V2X modem connection to perform V2X wireless communication,

A GNSS module unit 70 to generate a current coordinate and time synchronization signal,

It is composed of a logic interface stack layer software 80 that connects the V2X protocol stack represented by IEEE 1609.x and the physical layer for each V2X modem,

UART(Universal Asynchronous Receiver/Transmitter), USB(Universal Serial Bus), ETHERNET, I2C(Inter-Integrated Circuit), CAN(Controller Area Network), GPIO(General Purpose Input/Output), RS-232 or RS-485 Select from among the included communication methods to configure the platform internal bus (90), which is a multi-bus interface, and connect the V2X modem (50) using the platform internal bus (90). By providing two or more slots 60 that can be added, the modem is configured to be extended on the main control unit 10,

By configuring a protocol connection layer between the Platform Internal Bus (90) and IEEE 1609, which is a V2X standard protocol stack, protocol and message processing for an additional communication method is extended on the protocol connection layer to And application services are configured to be used without change.

The hybrid V2X roadside base station device according to the present invention allows multiple V2X communication by connecting one or more V2X modems for V2X communication to the roadside base station main control unit 10 through the modem expansion slot 50 inside. Is composed.

These V2X communication modems include existing V2X communication modems, including WAVE-V2X, LTE-V2X, and 5G-V2X, and modems that will be expanded and changed in the future.

The hybrid V2X roadside base station device is an infrastructure device for communication with a vehicle terminal device mounted on a vehicle, as described above, a main control unit for driving application service software for processing application service messages; A power module for supplying power to components of the roadside base station; V2X modem unit for performing physical RF wireless communication; GNSS unit for time synchronization with location information; It includes; an infrastructure communication module for communication with a control center or other infrastructure device through a wired communication network or a wireless communication network.

The main control unit 10, as a main CPU module, serves to read and decode program instructions and data from the main memory to perform arithmetic and logic operations or data processing.

In the main control unit 10, a protocol stack for V2X service is driven, and a device driver for an interface with a V2X modem connected to the main control unit is installed and driven.

The main control unit 10 is composed of any one selected from a single-core processor, a dual-core processor having two cores, a quad-core processor having four cores, and a hexa-core processor having six cores.

The power module 30 is a device that supplies power to each device constituting the hybrid V2X roadside base station device.

The infrastructure communication module 40 is a device used for communication with the external communication unit V2X roadside base station's center control system or other V2X roadside base stations, and may be connected to a wired communication network or a wireless communication network such as LTE or 5G.

The V2X modem unit 50 performing physical RF wireless communication is a device that is connected to the main control unit 10 by wire according to the V2X communication standard and transmits and receives data from the vehicle terminal through wireless communication.

The GNSS module unit 60 for time synchronization is a device that receives signals from satellites, transmits coordinates and standard time to the system, and is used for time synchronization of the communication module.

Hybrid V2X roadside base station apparatus according to the present invention,

UART(Universal Asynchronous Receiver/Transmitter), USB(Universal Serial Bus), ETHERNET, I2C(Inter-Integrated Circuit), CAN(Controller Area Network), GPIO(General Purpose Input/Output), RS-232 or RS-485 Two of the included communication methods to configure the Platform Internal Bus (90), and connect the V2X modem (50) using the Platform Internal Bus (90). By providing the above slot 60, it is a technical feature that the modem is configured to be extended on the main control unit 10.

Platform Internal BUS (90) for V2X modem is a core technology method for modem expansion. Communication bus including UART, USB, ETHERNET, I2C, CAN, which has been established as an industry standard, and power supply for power supply A bus for modem expansion is constructed with lines.

By providing an expansion slot that can use the Platform Internal Bus (90), various types of modems developed in the future can be mounted without changing the hardware of the main control unit of the V2X roadside base station. .

It is possible to communicate with the main control unit through a communication line on the bus provided according to the connection method of the modem to be used for expansion, and supply power to the modem through the supplied power line.

As shown in FIG. 2, a protocol stack connection module and a modem connected through a bus require a certain data conversion process in accordance with the existing protocol stack connection method in order to connect to the existing protocol stack. For this processing, a logic interface layer (Logic Interface) Layer) so that functions can be connected without changing the overall software.

In this way, the added V2X communication mode modem can be expanded or changed while maintaining the functionality and stability of the existing software.

Hybrid V2X roadside base station apparatus according to the present invention,

As shown in Figure 4, the hardware device driver of the V2X modem; Modem dependent software layer including MAC (Medium Access Control), LLC (Logical Link Control), PHY (Physical),

By adding a protocol conversion layer that connects the two layers between the IEEE 1609.x network layer, which is a standard V2X protocol, it provides application services of roadside base stations and independent connectivity with V2X protocol stack and physical V2X modem. It is configured to provide extensibility.

According to the present invention, by installing and replacing a simple modem module and installing software in the roadside base station, it is possible to change and expand the communication method, and through this, it is possible to reuse the existing controller, thereby greatly improving service stability and continuity. It is possible to reduce the cost of system replacement by more than 90% due to the change of communication method, and as the performance of the modem is improved, the improved performance of the modem can be replaced at the site in a short time, resulting in improved service. Big.

10: main control unit
20: roadside base station main board
30: Power Module
40: Infrastructure communication module
50: V2X modem unit
60: modem expansion slot
70: GNSS module unit
80: Logic interface stack layer software
90: Platform Internal BUS

Claims (3)

In comprising a multi-bus interface capable of connecting one or more V2X communication modems to the V2X roadside base station main control unit (Main CPU Module),

By configuring a protocol connection layer between the multi-bus interface and IEEE 1609, which is a V2X standard protocol stack, the protocol and message processing for additional communication methods are extended on the protocol connection layer so that the upper protocol layer and application service can be used without change. Hybrid V2X roadside base station apparatus using a multi-internal communication interface bus and protocol connection layer structure, characterized in that configured.
A main control unit 10 that reads and decodes program instructions and data from the main memory to execute arithmetic and logic operations or data processing; and
The roadside base station main board unit 20, which is located in the internal space of the roadside base station and plays an intermediate role in data transmission between the devices,
A power module 30 that is located on one side of the roadside base station main board 20 and supplies 5V to 24V power to each device,
An infrastructure communication module 40 that is connected to a central management server located in a remote location through a wired/wireless communication network and transmits and receives data to and from a control center or other infrastructure device,
A V2X modem unit 50 performing physical RF wireless communication,
A modem expansion slot 60 for V2X modem connection to perform V2X wireless communication,
A GNSS module unit 70 to generate a current coordinate and time synchronization signal,
It is composed of software 80 connecting the V2X protocol stack represented by IEEE 1609.x and the V2X modem,
UART(Universal Asynchronous Receiver/Transmitter), USB(Universal Serial Bus), ETHERNET, I2C(Inter-Integrated Circuit), CAN(Controller Area Network), GPIO(General Purpose Input/Output), RS-232 or RS-485 Select from among the included communication methods to connect the V2X modem 50 using the platform internal bus 90, including the platform internal bus 90, which is a multi-bus interface. By providing two or more slots 60 that can be added, the modem is configured to be extended on the main control unit 10,

The software 80 is a logic interface stack layer software that connects the V2X protocol stack represented by IEEE 1609.x and the physical layer for each V2X modem,
By configuring a protocol connection layer between the Platform Internal Bus (90) and IEEE 1609, which is a V2X standard protocol stack, protocol and message processing for an additional communication method is extended on the protocol connection layer to Hybrid V2X roadside base station device using a multi-internal communication interface bus and protocol connection layer structure, characterized in that it is configured to be used without changing and application services.


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