KR101223874B1 - System and Method for collecting Road Information using Mobile Sensor Network - Google Patents

Abstract

The present invention relates to a system and method for collecting road information, and more particularly, to receive and store road information collected from a mobile sensor network composed of sensor nodes mounted on a plurality of vehicles through a portable internet network, and to store and manage the information by area. It relates to a road information collection system and method.

The present invention provides a road information collection system using a mobile sensor network, comprising a sensor node which is mounted on a plurality of moving objects to form a mobile sensor network and generates road information of a road on which the moving object operates, and a handover function for the sensor node. And a base station configured to transmit road information received by using a wireless connection with the sensor node to a road information management server through a portable internet network, and using the location information included in the road information. It includes a road information management server to classify and store by. The road information includes location information of a moving body equipped with the sensor node and road situation information obtained from a sensor provided in the sensor node, and the road situation information includes traffic information and environment information of the road.

Mobile Sensor Network, Fixed Sensor Network, Mobile Internet, RAS, ACR

Description

System and Method for collecting Road Information using Mobile Sensor Network}

1 is a configuration diagram of an embodiment of a road information collection system according to the present invention;

2 is a configuration diagram of an embodiment of a sensor node according to the present invention;

3 is a diagram showing an embodiment configuration of road information generated at a sensor node according to the present invention;

4 illustrates a sensor node arrangement according to an embodiment of the present invention;

5 is a flowchart illustrating an embodiment of a method for collecting road information according to the present invention;

6 is a flowchart illustrating a method of providing a road information service according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

110: vehicle 115: sensor node

120: RAS 130: ACR

150: road information management server 160: client terminal

210: location information acquisition unit 220: traffic information sensor unit

230: environmental information sensor unit 240: control unit

250: mobile internet connection

The present invention relates to a system and method for collecting road information using a mobile sensor network, and more particularly, receiving road information collected from a mobile sensor network including sensor nodes mounted on a plurality of vehicles through a portable internet network. The present invention relates to a road information collection system and method using a mobile sensor network that stores and manages data.

Major industrialized countries are in a hurry to build a ubiquitous network not only in the IT industry, but also in all areas of transportation, environment, administration, logistics, airport, and port management. In particular, the transportation and logistics fields are the core fields of ubiquitous networking, and it is necessary to develop road information collection technology and application services using the same.

Conventional road information collection systems include a loop method, a CCTV method, and an image detector method. The loop method is a method of obtaining a traffic variable (vehicle presence, volume, speed, occupancy, column length of a vehicle, travel time, etc.) necessary for a traffic signal system using a detection area formed by a loop embedded in a road. The loop method obtains traffic variable information by detecting a change in the loop inductance caused by the vehicle when the vehicle passes through the detection area formed by the loop embedded in the road. This loop method has the advantage that it is easy to change the size and shape of the detection area and has excellent on-site detection ability.However, the installation of the loop detector requires control of traffic flow, long construction period, and high maintenance cost due to road damage. There are disadvantages. In addition, there is a disadvantage in that a separate system is needed to accurately determine the location of the burial and only traffic information limited to a specific point where the sensor is located can be collected.

The CCTV method is a method of directly inputting traffic information by receiving an image obtained from a camera installed in an area requiring traffic information from an information collection center and watching a visually transmitted image. The CCTV method not only takes excessive installation and labor costs, but also has a problem in that information reliability is low because there is a high possibility that an input error occurs as a person directly inputs.

The image detector method is a method of detecting traffic variables required for traffic control and traffic information analysis in real time by analyzing a camera image using image processing technology. The image detection method has the advantage of being able to acquire data in real time and easy contactless installation with the road, but has a disadvantage in that a large number of expensive image acquisition means must be arranged in a required area and maintenance costs are high. In addition, there is a problem that it is difficult to quickly collect traffic information when an accident occurs in a place where the image acquisition means is not arranged.

The conventional road information collection system is a fixed sensor network in which all sensor nodes are fixed, and it is difficult to solve the power supply problem, and a large investment cost is required for the installation of the sensor node to solve a large area. There is a problem that it is necessary and difficult to maintain. In addition, it is recognized that not only the real-time information collection is inferior, but also that the sensor may malfunction due to an environment (temperature, humidity).

The present invention has been proposed to solve the above problems, the road information collected by using a mobile sensor network consisting of a sensor node mounted in a plurality of vehicles to the road information management server using a mobile Internet network to deliver the road information It is an object of the present invention to provide a road information collection system and method using a mobile sensor network that can collect and manage.

In addition, the present invention solves the power supply problem in the conventional fixed sensor network by collecting the information of the road on which the vehicle is driven and transmitted to the road information management server through a portable Internet network, and is equipped with a plurality of vehicles, An object of the present invention is to provide a sensor node device constituting a mobile sensor network that can provide a wide sensing coverage.

Another object of the present invention is to provide a road information management server that receives road information generated by the mobile sensor network using a portable internet network and classifies and stores the road information.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a road information collection system using a mobile sensor network, comprising: a sensor node mounted on a plurality of moving objects to form a mobile sensor network, and generating road information of a road on which the moving object is driven; A base station which performs a handover function to the sensor node and transmits the received road information to a road information management server through an internet network by using a wireless connection with the sensor node; And the road information management server configured to receive the road information and classify and store the road information by location using the location information included in the road information, wherein the road information includes location information of the moving object mounted with the sensor node and the road information management server. It includes road situation information obtained by the sensor provided in the sensor node, the sensor node, the position information acquisition unit for obtaining the position information of the moving object is mounted; A sensor unit for obtaining road situation information including traffic information and environment information; A road information generator for generating road information by collecting the obtained road situation information and location information; And a wireless communication network connection unit which transmits the generated road information to the base station and supports IP mobility, wherein the sensor unit comprises: a traffic information sensor collecting traffic information of the road; And an environmental information sensor for collecting environmental information of the road.

In addition, the present invention, the sensor node device is mounted on a plurality of moving objects running on the road to collect the road information constituting a mobile sensor network, comprising: a position information acquisition unit for obtaining the position information of the moving object; A sensor unit for obtaining road situation information of the road; A road information generator for generating road information by collecting the obtained road situation information and location information; And a wireless communication network connection unit for transmitting the generated road information to the Internet network using a wireless communication with a base station performing a handover function and supporting IP mobility, wherein the sensor unit collects traffic information of the road. Traffic information sensor; And an environmental information sensor for collecting environmental information of the road.

In addition, the present invention, the road information management server using a mobile sensor network, the road information received via a wireless communication network from a plurality of sensor nodes mounted on a plurality of moving objects running on the road constituting a mobile sensor network through the wireless network A data processor for classifying each zone by using location information included in the information; And a data storage unit for storing road information classified by the zones, wherein the road information includes location information of a moving object obtaining the road information and road situation information obtained from a sensor provided at the sensor node. The road situation information includes traffic information and environment information of the road. The road information management server may further include a user authentication unit configured to authenticate a client terminal for receiving a road information service, and the data processing unit requests the service when there is a road information service request from the client terminal. The road information of the area associated with the extracted information from the data storage unit is processed and provided to the client terminal.

Meanwhile, the present invention provides a road information service providing method using a mobile sensor network, comprising: obtaining location information from a sensor node mounted on a plurality of moving objects running on a road and constituting a mobile sensor network; Collecting road situation information using a sensor provided at the sensor node; Generating road information by collecting the location information and road situation information; Transmitting the generated road information to a road information management server through a wireless communication network; And classifying and storing road information by zones using the location information in the road information management server. In addition, the road information service providing method of the present invention comprises the steps of performing authentication for the client terminal to receive the road information service; Receiving a road information service for a service request area from the client terminal; And extracting and processing the information of the service request zone from the road information management server and providing the extracted information to the client terminal.

The above-described contents of the present invention will become more apparent through the following detailed description with reference to the accompanying drawings, and thus, those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an embodiment of a road information collection system using a mobile sensor network (MSN) according to the present invention.

As shown in FIG. 1, the road information collection system of the present invention includes a sensor node 115, a radio access station (RAS) 120, an access control router (ACR) 130, and an IP network 140 mounted on a vehicle. ), The road information management server 150 is configured.

The sensor node 115 is mounted on the vehicle 110 that runs on the road to collect road information, and forms a mobile sensor network (MSN) that supports mobility of the sensor node. The sensor node 115 mounted on the vehicle 110 generates road information by collecting GPS location information and road situation information acquired through the sensor, and transmits the generated road information to the RAS 120 installed on the roadside. The road situation information includes traffic information and environment information of the road. The sensor node 115 includes a plurality of sensors for obtaining the traffic information (speed, camera image) and environmental information (temperature, humidity, yellow dust, ozone). In addition, the sensor node 115 includes a portable internet connection for connecting to a Wibro network. The portable Internet access unit supports IP mobility of the sensor node and wirelessly connects to the RAS 120.

Radio access station (RAS) 120 is a base station of a mobile Internet network, which is installed at a variable road to obtain road information and wirelessly receives road information from a sensor node 115 mounted on a vehicle 110 to perform ACR ( 130). The RAS 120 supports a handover function according to a portable Internet wireless access standard for the sensor node, and performs a portable internet wireless access function, an OFDM / TDD packet scheduling and channel multiplexing function, and a MAC frame variable control with the sensor node. Function and so on. According to a preferred embodiment of the present invention, the RAS 120 may be installed at 500 [m] intervals on a variable of roads to collect road information for stable wireless connection of the sensor node 115.

An access control router (ACR) 130 is a packet access router connecting the plurality of RAS 110 and the IP network 140, and manages road information through the IP network 140 with the road information transmitted from the RAS 120. Deliver to server 150. The ACR 130 performs an IP routing and mobility management function, a subscriber session management function, a handover control function, and the like.

The client terminal 160 requests the road information service by accessing the road information management server 150 through the portable Internet or the wired Internet. The service request information of the client terminal may include information on a zone (service request zone) and service type for which a service is desired.

The road information management server 150 classifies and stores road information received from the sensor node 115 according to location information included in the road information. In addition, when there is a road information service request of the client terminal 160, the road information of the corresponding area is extracted and processed and provided to the client terminal 160. The road information management server 150 includes a data processing unit 151, a data storage unit 152, and a user authentication unit 155, and the data storage unit 152 stores a traffic information database 153 for storing traffic information. And an environment information database 154 for storing environment information.

The data processor 151 classifies road information received from the plurality of sensor nodes 115 into zones according to location information included in the road information, and stores the road information in the data storage unit 152. Specifically, the road information includes traffic information and environment information, and the traffic information is stored and managed in the traffic information database 153 and the environment information in the environment information database 154, respectively. Zones classified according to the location information may be divided based on the point where the RAS 120 is installed. In this case, the data storage unit 152 may store a matching table composed of the zone and a corresponding position value (coordinate value), and the data processing unit 151 receives the road received from the sensor node 115 in the matching table. The area of the road information is determined by searching an area corresponding to the location information included in the information.

On the other hand, the user authentication unit 155 authenticates whether the client terminal 160 to receive the road information service subscription. In addition, when there is a road information service request from the authenticated client terminal 160, the data processing unit 151 extracts the road information for the service request area from the data storage unit 152 and processes the road information service into a format suitable for the road information service. Transmit to the client terminal 160.

2 is a diagram illustrating an embodiment of a sensor node 115 according to the present invention.

As shown in FIG. 2, the sensor node 115 of the present invention includes a location information acquisition unit 210, a traffic information sensor unit 220, an environment information sensor unit 230, a control unit 240, and a portable Internet connection unit ( 250).

The location information acquisition unit 210 transmits the GPS location information obtained by analyzing the signal received from the GPS satellites to the controller 240. On the other hand, the vehicle equipped with the sensor node may be provided with a separate device having a GPS receiver, such as an automatic navigation device, in this case, the location information acquisition unit 210 controls the location information obtained from the separate GPS receiver It serves as an interface to pass to 240.

The traffic information sensor unit 220 includes a speed sensor 221 for detecting a speed of a vehicle equipped with a sensor node for collecting traffic information, and a camera 222 for acquiring a surrounding image of the vehicle. The traffic information sensor unit 220 transmits the information obtained from the sensors for obtaining the traffic information to the controller 240. Meanwhile, the environmental information sensor unit 230 includes a temperature sensor 231, a humidity sensor 232, a yellow dust sensor 233, and an ozone sensor 234 for collecting environmental information, and sensors for obtaining the environmental information. The obtained information is transferred to the controller 240.

The controller 240 is location information obtained from the location information acquisition unit 310, traffic information obtained from the traffic information sensor unit 220, and environmental information 230 obtained from the environment information sensor unit 230. Generate road information by collecting. 3 is a diagram illustrating a partial configuration of road information packets generated by collecting at a sensor node. As shown in FIG. 3, the road information packet includes location information 310 and road situation information 320, and the road situation information 320 is traffic information collected by the traffic information sensor 220. 330 and the environmental information 340 obtained from the environmental information sensor 230. The traffic information 330 includes speed information 331 and image information 332, and the environmental information 340 includes humidity information 341, temperature information 342, yellow dust information 343, and ozone information ( 344). The road information management server 150 receiving the road information classifies the traffic information 330 and the environment information 340 into zones based on the location information 310 included in the road information packet, and classifies the classified information into traffic. The information database 153 and the environment information database 154 are respectively stored.

Meanwhile, the portable Internet access unit 250 transmits the road information generated by the control unit 240 to the RAS 120 installed on the roadside to perform a handover function. For this, the IP mobility support function and the MAC frame according to the radio wave environment are provided. It performs variable control function and authentication / encryption function.

4 illustrates a sensor node arrangement according to an embodiment of the present invention.

Referring to FIG. 4, in the case of the Gyeongbu Expressway 410, a sensor node may be mounted on a total of 120 moving vehicles, and may include 'Seoul 420 to Daejeon 430' and 'Daejeon 430 to Daegu 440'. 46, 38, 30 and 8 sensor nodes can be operated in the sections of ',' Daegu 440-Ulsan 450 'and' Ulsan 450-Busan 460 ', respectively. The distance between the sensor nodes arranged as shown in Figure 4 is' Seoul 420 ~ Daejeon 430 ',' Daejeon 430 ~ Daegu 440 ',' Daegu 440 ~ Ulsan 450 'and' Ulsan ( 450] ~ Busan (460) 'section has an average distance of 3.3 [km], 4.13 [km], 3.7 [km] and 3 [km] respectively, and the average distance between sensor nodes in all sections is 3.5 [km]. Becomes Therefore, when the sensor-equipped vehicle runs at a speed of 100 [km / hour], the mobile sensor network consisting of 120 sensor-equipped vehicles can collect road information for the same area at about two minute intervals. In addition, such a mobile sensor network has an advantage of having a very wide coverage without a shadow area as compared to a conventional fixed sensor network according to the movement of a sensor-equipped vehicle. In addition, since the sensor node of the sensor-equipped vehicle uses the battery power of the vehicle, it is easy to solve the power supply problem, which has been an issue of the conventional fixed sensor network.

5 is a flowchart illustrating an embodiment of a method for collecting road information according to the present invention.

First, the sensor node-equipped vehicle 110 is driven on a road to collect road information, and the sensor node 115 mounted on the vehicle acquires location information, traffic information, and environmental information of the vehicle (S510). Subsequently, the sensor node 115 generates road information by collecting the obtained location information, traffic information, and environmental information, and manages road information using the generated road information using a mobile Internet network including RAS and ACR. The server 150 transmits the data to the server 150 (S520). The road information management server 150 classifies the road information by zone using location information included in the received road information and stores and manages the road information in the data storage unit 152 (S530). In detail, the road information management server 150 classifies the traffic information and the environment information according to the location information included in the road information packet, and classifies the classified traffic information and the environment information into the traffic information database 153 and the environment information. Each database is stored and managed in the database 154.

6 is a flowchart illustrating a method of providing a road information service according to the present invention.

First, when the client terminal 160 accesses the road information management server 150 through a wired / wireless communication network (S610), the user authentication unit 155 performs authentication on whether the client terminal 160 subscribes to the road information service. (S620). The authenticated client terminal 160 requests the road information service by selecting an area and a service type for which the road information service is desired (S630). For example, the client terminal 160 may select 'Daejeon area' and 'traffic situation information' for the desired service request area and service type, respectively, through the screen provided by the road information management server 150. Subsequently, the data processing unit 151 extracts road information necessary for the request service of the client terminal 160 from the data storage unit 152 and processes the road information into data having a format suitable for the road information service (S640). It transmits to the client terminal 160 through the wired or wireless communication network (S650). For example, when the client terminal selects the 'Daejeon area' and 'traffic situation information', the data processor 151 extracts and analyzes the speed information of the area around Daejeon from the traffic information database 153 to analyze the vehicle in the area around Daejeon. It may be determined whether the communication is smooth, and according to the determination result, the service information may be processed into a format suitable for the road information service (for example, 'the battle zone is currently congested') and provided to the client terminal 160. have. In addition, the road information management server 150 may provide map data in the data storage unit 152 to the client terminal 160 by providing a road information service in the form of a map in which road information is displayed.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above, by providing a road information collection system using a mobile sensor network (mobile sensor network) for collecting road information through a sensor node mounted on a vehicle and a portable Internet network, a conventional fixed sensor network (Fixed Sensor Compared to a network, it is possible to provide a wide sensing coverage area without a shadow area.

In addition, by providing a sensor node constituting the mobile sensor network, the present invention has the effect of solving the power supply problem in the conventional fixed sensor network and significantly reducing the installation and maintenance costs of the sensor node.

In addition, the present invention provides a road information collection system for classifying, storing and managing traffic information and environmental information transmitted in real time through a mobile sensor and a portable Internet network, for a location-based service (LBS) and a ubiquitous network. It has the effect of inducing rapid spread of infrastructure.

Claims (19)

delete In the sensor node device is mounted on a plurality of moving objects running on the road to collect road information to configure a mobile sensor network, A location information acquisition unit for obtaining location information of the moving object; A sensor unit for obtaining road situation information of the road; A road information generator for generating road information by collecting the obtained road situation information and location information; And It includes a wireless communication network access unit for transmitting the generated road information to the Internet network using a wireless communication with the base station performing a handover function and supports IP mobility, The sensor unit includes: A traffic information sensor collecting traffic information of the road; And Environmental information sensor to collect the environmental information of the road Sensor node device comprising a. The method of claim 2, The traffic information sensor includes a speed sensor and a camera, The environmental information sensor includes a temperature sensor, a humidity sensor, a yellow dust sensor, and an ozone sensor. The method of claim 2, The wireless communication network connection unit is a portable internet connection unit for connecting with a portable internet network, The base station is a sensor node device, characterized in that the radio access station (RAS) performing a handover function according to the portable Internet wireless access standard by wirelessly connecting to the portable Internet access unit. delete In the road information management server using a mobile sensor network, A data processor configured to classify road information received from a plurality of sensor nodes constituting a mobile sensor network on a plurality of moving objects running on a road through a wireless communication network for each zone by using location information included in the road information; And Includes a data storage for storing the road information classified by the zone, The road information may include location information of a moving object that acquires the road information and road situation information acquired by a sensor provided at the sensor node. The road situation information, traffic information and environmental information of the road, road information management server. The method of claim 6, The traffic information includes speed information and surrounding image information of the moving object, The environment information includes road temperature information, humidity information, yellow dust information and ozone information. The method of claim 6, Further comprising a user authentication unit for performing authentication for the client terminal for receiving the road information service, The data processing unit, When there is a road information service request from the client terminal, the road information management server extracts and processes the road information of the area related to the service request from the data storage unit, and provides it to the client terminal. delete delete In the road information collection system using a mobile sensor network, A sensor node mounted on a plurality of moving objects to form a mobile sensor network, and generating road information of a road on which the moving object is driven; A base station which performs a handover function to the sensor node and transmits the received road information to a road information management server through an internet network by using a wireless connection with the sensor node; And Receiving the road information includes the road information management server for classifying and storing by zone using the location information included in the road information, The road information includes location information of a moving body on which the sensor node is mounted and road situation information obtained from a sensor provided in the sensor node. The sensor node, A position information acquisition unit for acquiring position information of the movable body on which the sensor node is mounted; A sensor unit for obtaining road situation information including traffic information and environment information; A road information generator for generating road information by collecting the obtained road situation information and location information; And A wireless communication network connection unit for transmitting the generated road information to the base station and supporting IP mobility; The sensor unit includes: A traffic information sensor collecting traffic information of the road; And Environmental information sensor to collect the environmental information of the road Road information collection system comprising a. The method of claim 11, The traffic information sensor includes a speed sensor and a camera, The environmental information sensor includes a temperature sensor, a humidity sensor, a yellow dust sensor and an ozone sensor. The method of claim 11, The wireless communication network connection unit is a portable internet connection unit for connecting with a portable internet network, The base station is a road information collection system, characterized in that the radio access station (RAS) performing a handover function according to the portable Internet wireless access standard by wirelessly connecting to the portable Internet access unit. The method of claim 11, The road information management server, A data processor for classifying the road information into zones by using location information included in the road information; And Data storage unit for storing the road information classified by the zone Road information collection system comprising a. 15. The method of claim 14, The road information management server, Further comprising a user authentication unit for performing authentication for the client terminal for receiving the road information service, The data processing unit, And a road information service request from the client terminal, extracting and processing road information of an area related to the service request from the data storage unit and providing the same to the client terminal. In the road information service providing method using a mobile sensor network, Obtaining location information from a sensor node mounted on a plurality of moving objects running on a road and constituting a mobile sensor network; Collecting road situation information using a sensor provided at the sensor node; Generating road information by collecting the location information and road situation information; Transmitting the generated road information to a road information management server through a wireless communication network; And Storing road information by area by using the location information in the road information management server; Road information service providing method comprising a. 17. The method of claim 16, The road situation information, Road information service providing method comprising the traffic information and environmental information of the road. The method of claim 17, The traffic information includes speed information and surrounding image information of the moving object, The environment information includes road temperature information, humidity information, yellow dust information and ozone information. 17. The method of claim 16, Performing authentication on the client terminal for receiving the road information service; Receiving a road information service for a service request area from the client terminal; And Extracting and processing the information of the service request zone from the road information management server and providing the information to the client terminal; Road information service providing method further comprising.

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