KR20210070038A - Wired and wireless communication net work system and method for providing traffic safety service - Google Patents

Abstract

A wired/wireless communication network system of the present invention provides a traffic safety service using an intelligent road lighting platform. The intelligent road lighting platform includes: a plurality of local devices mounted on road lighting; a road lighting mesh node having the plurality of local devices as clients and receiving event messages from each local device or sending the event messages to each local device; and a road lighting gateway which forms a wireless mesh network together with a road lighting mesh node, receives the event message from the road lighting mesh node, or transmits the event message from the road lighting mesh node. Therefore, additional installation cost is reduced by using the existing road lighting as an infrastructure.

Description

WIRED AND WIRELESS COMMUNICATION NET WORK SYSTEM AND METHOD FOR PROVIDING TRAFFIC SAFETY SERVICE

The present invention relates to a technology for proposing roadside devices and a wired/wireless network structure necessary for the safety of vehicles traveling on the road and pedestrians passing by the roadside, and providing an ultra-low delay safety service through this.

To date, many studies have been conducted to introduce intelligent traffic systems or utilize intelligent CCTVs to solve problems such as accidents and public safety related to road traffic.

The intelligent transportation system prevents accidents in advance or provides various transportation convenience to drivers by sharing vehicle driving information and various event information of surrounding road traffic through vehicle-to-vehicle communication (V2X) technology between vehicle and roadside base station. to provide.

In particular, safety services provided by roadside base stations include traffic light information, road traffic information such as surrounding falling objects, intersection safety information, and real-time map information to vehicles through V2X technology to improve safety and convenience.

In addition, through vehicle-to-vehicle communication, we are researching and developing safer vehicle transportation services by providing emergency information from the preceding vehicle or delivering accident information to the following vehicle, or by expanding the sensing range through cooperative driving with surrounding vehicles.

Safety and monitoring services through intelligent CCTV have recently been gradually expanding centering on smart cities and many local governments, and services that analyze and respond to various incidents in real time are being implemented.

In order to provide real-time services, edge technology that provides necessary services by analyzing primary event detection and response from a camera sensor installed in the infrastructure is being utilized.

This edge technology enables a real-time service by allowing the primary analysis and response at the local level to perform centralized analysis and processing of the conventional collection data in the server or control center.

However, in the case of the intelligent traffic system, the infrastructure for the traffic safety service discussed so far installs a separate roadside base station for approximately every 1km section on major arterial roads and highways to provide traffic-related information to vehicles that can communicate with nearby vehicles. It was limited to providing I2V service. Mainly, only vehicle-related accident information, traffic light information, and event information on the driving road are limited, so there is a limit to the service linked with event information according to the condition of nearby pedestrians.

In addition, in the case of a vehicle without a V2X communication device, there is a disadvantage that these services cannot be used. Similarly, in the case of the existing intelligent CCTV, a limited (non) real-time response service is provided by establishing an infrastructure in hotspot areas such as illegal parking enforcement areas, accident-prone areas, and crime areas to transmit event information to the server or through locally installed speakers. was limited to

Therefore, research and development are required for real-time traffic safety services that consider both vehicles and pedestrians, the configuration of systems necessary to provide these services, and the establishment and design of networks between systems.

The present invention proposes a safety service suitable for all vehicles, drivers and pedestrians in order to solve the limited service problem of the conventional intelligent traffic system and intelligent CCTV described above, and a device necessary to accurately determine and provide a lossless real-time safety service and a method for designing a network structure.

The above and other objects, advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

The wired/wireless communication network system of the present invention provides a traffic safety service using an intelligent road lighting platform, the intelligent road lighting platform comprising: a plurality of local devices mounted on the road lighting; a road lighting mesh node having the plurality of local devices as clients and receiving event messages from each local device or sending an event message to each local device; and a road lighting gateway that forms a wireless mesh network together with the road lighting mesh node, receives the event message from the road lighting mesh node, or transmits the event message from the road lighting mesh node.

According to the present invention, it is possible to provide a device and a network that can reduce additional installation costs by utilizing existing street lights as infrastructure and provide suitable and accurate traffic safety services suitable for all road objects (vehicles, drivers and pedestrians). there is an advantage

1 is a conceptual diagram of a service using an intelligent road lighting platform according to an embodiment of the present invention.
2 is a system configuration diagram of each device constituting an intelligent road lighting platform according to an embodiment of the present invention.
3 is a flowchart of a message processing procedure when a local event occurs according to Embodiment 1 of the present invention;
4 is a flowchart of a message processing procedure when a global event occurs according to Embodiment 2 of the present invention;
5 is a diagram for explaining a network structure used in communication between mesh nodes and a network setting between a mesh node and a client (local device) according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a computing environment of each of the devices shown in FIG. 2 .

Hereinafter, various embodiments of the present invention will be described in connection with the accompanying drawings. Various embodiments of the present invention can be made various changes and can have various embodiments, specific embodiments are illustrated in the drawings and the related detailed description is described. However, this is not intended to limit the various embodiments of the present invention to specific embodiments, and should be understood to include all modifications and/or equivalents or substitutes included in the spirit and scope of the various embodiments of the present invention. In connection with the description of the drawings, like reference numerals have been used for like components.

Expressions such as “comprises” or “may include” that may be used in various embodiments of the present invention indicate the existence of a disclosed corresponding function, operation, or component, and may include one or more additional functions, operations, or components, etc. are not limited. In addition, in various embodiments of the present invention, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one It should be understood that it does not preclude the possibility of the presence or addition of or more other features or numbers, steps, operations, components, parts, or combinations thereof.

1 is a conceptual diagram of a service utilizing an intelligent road lighting platform according to an embodiment of the present invention.

Referring to Figure 1, the intelligent road lighting platform forms a local network.

To form a local network, the intelligent road lighting platform largely includes a road lighting 100 , a road lighting mesh node 200 , and a road lighting gateway 300 , GW.

In addition, the intelligent road lighting platform is equipped with an IoT sensor 101, an intelligent edge unit 102, an intelligent edge unit, a display device 103, and an IP camera (such as a CCTV) mounted on a road lighting pole. 104) and the like. In addition, additional detailed devices may be further included if necessary.

The intelligent road lighting platform collects road environment information by combining the sensors 101 and 104 and information communication technology (ICT) with the road lighting 100, recognizes the situation, and determines the digital signage device 103. And through I2X linkage, it notifies road users of danger in advance or provides a service that enables prompt handling in case of an accident, and can be called a 'system' that provides such a service.

The IoT sensor devices 101 and the camera 104 are used as devices for collecting road environment information.

The intelligent edge unit 102 is used as a device for recognizing and judging danger/accident situations in a specific area, such as an intersection/school zone/tunnel. When the intelligent edge unit 102 determines a dangerous situation, the determination result is generated as event information and transmitted to the road lighting mesh node 200 .

The road lighting mesh node 200 functions as a communication device, receives the event information generated by the intelligent edge unit 102 and transmits it to the road lighting gateway 300 .

The road lighting gateway 300 transmits the event information received from the intelligent edge unit 102 to an external management server (local platform or integrated platform).

As such, the event information generated by the intelligent edge unit 102 is transmitted to an external management server (local platform or integrated platform) via the road lighting mesh node 200 and the road lighting gateway 300 as communication devices.

In addition, the intelligent edge unit 102 transmits event information to the digital signage device 103 .

The display device 103 is a digital display device that has a communication function and can be remotely controlled through a network, and may be referred to as a 'digital signage device'.

The display device 103 displays the event information received from the intelligent edge unit 102 to quickly notify the road conditions to vehicles/pedestrians in the local area and prevent another secondary accident.

The road lighting 100 is generally installed at intervals of 10 m or more in consideration of the width and illuminance of the road. An intelligent edge unit 102 and a road lighting mesh node 200 are deployed for each road lighting.

The road lighting mesh node 200 may share information through communication between the intelligent edge units 102 for more accurate cognitive determination, if necessary.

The road lighting gateway 300 forms an I2I mesh network based on wireless communication with two or more mesh nodes 200, and sends event information recognized and determined by the intelligent edge unit 102 to an external server or The request is transmitted to the intelligent IoT sensor 101 or the intelligent edge unit 102 .

2 is a system configuration diagram of each device constituting an intelligent road lighting platform according to an embodiment of the present invention.

Referring to Figure 2, in the intelligent road lighting platform according to an embodiment of the present invention, the road lighting (100 in Figure 1) is installed in the children's protection zone, crosswalk, intersection, tunnel section, to fit the accident-prone areas such as ice section Multiple IoT sensors 101, intelligent edge unit 102, display device 103, camera 104, etc. are configured as clients of mesh node 200, mesh node 200 and road lighting gateway 300 is composed of a mesh network.

In this way, through close information sharing, it is possible to increase the safety of pedestrians, drivers and vehicles present on the road/traffic space and reduce traffic accidents.

Each device has a transmitter/receiver for mutual information sharing and a hardware module, a software module, or a combination thereof that performs data processing, control, data display, channel/path setting, etc. for processing the unique functions of each device. included modules.

For example, the IOT sensor 101 includes a transmitter/receiver 104_1 and a control unit 104_2, and the intelligent edge unit 102 includes a transmitter/receiver 102_1 and a data processing unit 102_2, and a display device 103 includes a receiver 103+1 and a data display unit 103_2, the camera 104 includes a transmitter/receiver 104_1 and a control unit 104_2, and the mesh node 200 includes a communication channel/ It includes a path setting unit 200_1, an I2I transceiver 202, a data processing unit 203, and a client transmitter/receiver 204, and the gateway 300 includes a transmitter/receiver and a mesh node interworking unit. In addition, the external management server (local platform and integrated platform server) 400 includes a transmitter/receiver and a message processing unit.

The transmitter/receiver 401 of the external management server 400 is connected to communicate with the transceiver 301 of the gateway 300 , and the external management server 400 and the gateway 300 perform a message interworking function.

The gateway 300 communicates with the mesh node 200 through the mesh node interworking unit 302 .

The mesh node 200 performs communication between the same mesh nodes through the I2I transmitter/receiver 202 .

The mesh node 200 exchanges information with clients such as the IoT sensor 101 , the intelligent edge unit 102 , the display device 103 , and the camera 104 through the transmitter/receiver 204 .

The IoT sensor 101 , the intelligent edge unit 102 , the display device 103 , and the camera 104 constituting the clients of the mesh node 200 may perform communication through their respective transmitters/receivers.

Information collected by the clients of the mesh node 200 may be shared between the mesh nodes 200 or transmitted to the external management server 400 through the gateway 300 .

Similarly, the external management server 400 can control or access clients of the mesh node 200 through the mesh node 200 via the gateway 300 .

The setting unit 200_1 of the mesh node 200 sets an optimal communication channel (CCH or SCH) and a communication path on the mesh network according to the type and protocol of data exchanged. Here, the communication channel includes a control channel (CCH) and a service channel (SCH).

Hereinafter, a traffic safety service processing procedure (or message processing procedure) using the intelligent road lighting platform shown in FIGS. 1 and 2 will be described in detail.

The traffic safety service processing procedure according to an embodiment of the present invention is divided according to whether the starting point of the message is the external management server 400 or the intelligent edge unit 102 mounted on the road lighting.

Hereinafter, for clear classification of the service processing procedure, the case where the starting point of the message is the external management server 400 is referred to as 'global event generation', and the case where the starting point of the message is the intelligent edge unit 102 is 'local event generation' ' is referred to as

Example 1

Embodiment 1 relates to a message processing procedure when a local event occurs.

3 is a flowchart of a message processing procedure when a local event occurs according to Embodiment 1 of the present invention.

Referring to FIG. 3 , in the message processing procedure when a local event occurs, the mesh node 200 and the gateway send event messages corresponding to multiple events generated by the intelligent edge unit 102, which is a client of the mesh node 200, through real-time processing. It is a processing procedure necessary in the process of transmitting through an uplink leading to an external management server 400 (intelligent road lighting local/integrated platform) via 300 .

First, in step S301, a plurality of mesh nodes 200 and the gateway 300 configure a wireless mesh network based on the (IEEE 802.11p) physical layer, and a process of setting a communication channel is performed. The configuration of the mesh network and the setting of the communication channel used by each mesh node 200 are performed before the service is started.

Next, in step S302, when the intelligent edge unit 102 (local device 1) determines a dangerous situation, the data processing unit 102_2 of the intelligent edge unit 102 generates an event and sends an event message corresponding to the generated event. create

Next, in step S303 , the transmitter 202 of the intelligent edge unit 102 transmits the generated event message to the mesh node 200 . In this case, in order to transmit the event message to the mesh node 200 , a process such as modulation, amplification, filter, frequency conversion, etc. may be performed on the event message.

Next, in step S304 , the receiver 203 of the mesh node 200 receives the event message from the intelligent edge unit 102 . In order to receive the event message, a process such as demodulation, amplification, filter, frequency conversion, etc. may be performed on the event message.

Then, in step S305, the data processing unit 203 of the mesh node 200 analyzes the event message received from the intelligent edge unit 102, and extracts the destination address (Destination MAC address) included in the event message, It is checked whether the extracted destination address is an address representing the local device 101, 102, 103 or 104 in the street lighting.

If the destination address of the event message is the address of another local device 101, 102, 103 or 104 mounted on the same road lighting 100, that is, the client device, the process proceeds to step S306.

In step S306, the data processing unit 203 of the mesh node 200 transmits the event message as a local message to the corresponding local device through the receiver 204. In step S307, the corresponding local device transmits the event as the local message. receive a message

On the other hand, if the destination address of the event message is not the address of the local device 101, 102, 103 or 104, that is, the client device, the process proceeds to step S308.

In step S308, the data processing unit 203 of the mesh node 200 checks whether the destination address of the event message is the address of the end-to-end communication device constituting the mesh network.

When the destination address of the event message is the address of the end device of the mesh network, in step S310 , the data processing unit 203 of the mesh node 200 transmits the event message to the gateway 300 through the transmitter 202 , in step S310 , In S312, the transceiver 301 of the gateway 300 receives the event message from the mesh node 200 and transmits the corresponding event information to the external management server 400 through an external network (350 in FIG. 2).

If the destination address of the event message is the address of the neighboring mesh node 200_1 constituting the mesh network (the event message is a message broadcast to the neighboring mesh node), in step S309, the transmitter 202 of the mesh node 200 transmits an event message to the neighboring mesh node 200_1 under the control of the data processing unit 203 , and in step S311 , the receiver of the neighboring mesh node 200_1 receives the event message. By repeating this procedure, an event message generated locally of a specific road lighting node is displayed on the display device 103 disposed in the surrounding road lighting 100 through a mesh network (250 in FIG. 2 ).

Example 2

Embodiment 2 relates to a message processing procedure when a global event occurs.

4 is a flowchart of a message processing procedure when a global event occurs according to Embodiment 2 of the present invention.

Referring to FIG. 4 , first, in step S401, mesh network configuration and communication channel setup between mesh nodes are completed.

Next, in step S402 , the event message generated by the external management server 400 is transmitted to the gateway 300 , which is a connection point of the wireless mesh network ( 250 in FIG. 2 ).

Next, in step S403 , the gateway 300 transmits the event message received from the external management server 400 to the wireless mesh network ( 250 in FIG. 2 ).

Next, in step S404 , the mesh node 200 receives an event message passing through the gateway 300 through the wireless mesh network ( 250 in FIG. 2 ).

Next, in S405, the data processing unit 203 of the mesh node 200 analyzes the destination address (Destination MAC address) of the event message, and the destination address is the address of the local device 101, 102, 103 or 104 in the street lighting. check cognition

If the destination address of the event message is the address of the local device 101, 102, 103 or 104 in the street lighting, the process proceeds to step S406, and in step S406, the corresponding destination address through the transmitter 204 of the mesh node 200 The event message is transmitted to the local device of , and in step S407, the corresponding local device receives the event message.

When the destination address of the event message is not the address of the local device (client or client device) 101, 102, 103 or 104 in the street lighting, that is, the neighboring mesh node 200_1 in the mesh network (250 in FIG. 2) In the case of an address, the process proceeds to step S408 , and in step S408 , an event message is transmitted to the neighboring mesh node 200_1 through the transmitter 202 of the mesh node 200 .

Next, in step S409, the neighboring mesh node 200_1 receives the event message. The processing of the received event message is the same as the description of the processing of step S311 of FIG. 3 .

5 is a diagram for explaining a network structure used in communication between mesh nodes and a network configuration between a mesh node and a client (local device) according to an embodiment of the present invention.

Referring to FIG. 5 , the gateway 300 and the mesh nodes 200 and 200_1 to 2 transmit and receive radio waves in the 5.9 GHz ITS band through a physical layer based on a wireless communication technology (eg, IEEE 802.11p).

In the 5.9 GHz ITS band, 7 channels having a 10 MHz band can be used. For fast and accurate data transmission, multiple channels are simultaneously used as transmission/reception channels through multiple RF transceivers in the physical layer.

It also uses the control channel (CCH) used in WAVE communication for initial I2I mesh network configuration and channel setup. After the initial network setting, various data are transmitted using a plurality of channels using a service channel (SCH) and a control channel (CCH).

The gateway 300 and the mesh nodes 200 , 200_1 , ... 200_n use a mesh communication technology (eg, IEEE 802.11s) for mutual mesh network configuration and function utilization.

The main functions of each of the gateway 300, mesh nodes 200, 200_1, ... 200_n, and local clients 101 to 104 are as follows.

The gateway 300 performs a function of allocating IPs to local clients subordinate to the mesh node through L2 communication through the mesh node 200 . In addition, a network management function of clients connected to the mesh node 200 is performed.

The mesh node 200 performs a bridge function to deliver a message destined for its own client. If the destination address of the received packet does not belong to itself or a subordinate local client, it performs forwarding and proxy functions to forward the packet to a neighboring mesh node.

In addition, the mesh node 200 periodically identifies and manages the operation of subordinated local clients, etc., and performs an agent function to deliver it to the gateway 300 .

The local clients 101 to 104 periodically transmit their status information to the mesh node serving as the master to inform whether they are operating normally.

6 is a diagram illustrating a computing environment to which each of the devices illustrated in FIG. 2 can be applied.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be implemented directly in hardware executed by the processor 610 , a software module, or a combination of the two.

A software module resides in a storage medium (ie, memory 630 and/or storage 660 ) such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM. You may.

An exemplary storage medium is coupled to the processor 610 , the processor 610 capable of reading information from, and writing information to, the storage medium. Alternatively, the storage medium may be integral with the processor 610 . The processor and storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and storage medium may reside as separate components within the user terminal.

Example methods of the present disclosure are expressed as a series of operations for clarity of description, but this is not intended to limit the order in which the steps are performed, and if necessary, each step may be performed simultaneously or in a different order. In order to implement a method according to the present disclosure, other steps may be included in addition to the illustrated steps, some steps may be included except some steps, or additional other steps may be included except some steps.

Various embodiments of the present disclosure do not list all possible combinations, but are intended to describe representative aspects of the present disclosure, and matters described in various embodiments may be applied independently or in combination of two or more.

In addition, various embodiments of the present disclosure may be implemented by hardware, firmware, software, or a combination thereof. For implementation by hardware, one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose It may be implemented by a processor (general processor), a controller, a microcontroller, a microprocessor, and the like.

The scope of the present disclosure includes software or machine-executable instructions (eg, operating system, application, firmware, program, etc.) that cause an operation according to the method of various embodiments to be executed on a device or computer, and such software or and non-transitory computer-readable media in which instructions and the like are stored and executed on a device or computer.

The above description is merely illustrative of the technical idea of the present invention, and various modifications and variations are possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Accordingly, the embodiments expressed in the present invention are not intended to limit the technical spirit of the present invention, but to illustrate, and the scope of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas that are equivalent to or within the equivalent range should be construed as being included in the scope of the present invention.

Claims (1)

In a wired/wireless communication network system that provides traffic safety services using an intelligent road lighting platform,
The intelligent road lighting platform,
a number of local devices mounted on road lighting;
a road lighting mesh node having the plurality of local devices as clients, receiving event messages from each local device, or sending an event message to each local device;
A road lighting gateway that forms a wireless mesh network together with the road lighting mesh node, receives the event message from the road lighting mesh node, or transmits the event message from the road lighting mesh node
Wired and wireless communication network system comprising a.

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