KR100814383B1 - System and Method for providing Location-based Service using Geographical Code in USN - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a system and method for providing a location based service using a geographical code in a USN environment.

2. The technical problem to be solved by the invention

The present invention provides a system and method for providing a location-based service in a USN environment that can provide various location-based services to a sensor node by using a geographical code that can systematically and efficiently manage location information of a sensor node in a USN environment. The purpose is to provide

3. Summary of Solution to Invention

The present invention is a system for providing a location-based service using a geographic code in a Ubiquitous Sensor Network (USN) environment. A plurality of sensor nodes for generating sensing information by performing a sensing function on a physical space are connected to a network. A sensor network for transmitting Geographical Code (GGC) information for indicating location information of the sensor node together with the sensing information, and a sensor network connected to the sensor network to receive the GGC information and sensing information of the sensor node. And a USN server for providing a location-based service according to the GGC information and sensing information to a user, wherein the GGC information includes location information of a network node and management area range information.

4. Important uses of the invention

The present invention is used for location-based services.

Location Based Service (LBS), Ubiquitous Sensor Network (USN), Geographic Code

Description

System and method for providing location-based service using geographic code in WINS environment and method thereof {System and Method for providing Location-based Service using Geographical Code in USN}

1 is a configuration diagram of an embodiment of the USN to which the present invention is applied;

2 is a detailed configuration diagram of an embodiment of the sensor node of FIG. 1;

3 is a configuration diagram of various embodiments of the USN to which the present invention is applied;

4 is a configuration diagram of an embodiment of a location-based service system in a USN environment according to the present invention;

5 is a configuration diagram of an embodiment of a sensor node for location-based services according to the present invention;

6 is a diagram illustrating an embodiment of a sensor network through location-based routing according to the present invention;

7 is an exemplary diagram showing an embodiment structure of a sensor network reconfigured according to a moving sensor node;

8 is an exemplary diagram for explaining a generation process of GGC information according to the present invention;

9 is an exemplary diagram for explaining a GGC binding function of a sensor node according to the present invention;

10 is an exemplary diagram for explaining a location-based service by direct binding according to the present invention;

11 is an exemplary diagram for explaining indirect binding by a position sensor node when the sensor network is composed of a position sensor node and a non-position sensor node according to an embodiment of the present invention;

12 is an exemplary diagram for explaining indirect binding by a GPS node according to an embodiment of the present invention;

13 is an exemplary diagram for explaining indirect binding by an MS according to an embodiment of the present invention;

14 is an exemplary diagram for explaining indirect binding by a BS according to an embodiment of the present invention;

15 is an exemplary diagram for explaining indirect binding by an IP node according to an embodiment of the present invention;

16 is a configuration diagram of one embodiment of a USN server according to the present invention;

17 is an exemplary diagram illustrating a GGC registration process of a sensor node through a location management module of a USN server according to an embodiment of the present invention;

18 is an exemplary diagram for explaining a GGC object according to the present invention;

19 is a network diagram of an LBS middleware layer according to an embodiment of the present invention;

20 is an exemplary diagram illustrating a delivery process of a GGC object according to an embodiment of the present invention;

21 is a flowchart illustrating an embodiment of a process for providing a location based service using a geographical code (GGC) in a USN environment according to the present invention;

22 is an exemplary diagram for a process of providing a location based service in a general USN environment according to an embodiment of the present invention;

23 is an exemplary diagram for providing a location-based service providing process in a general USN environment through a gateway according to an embodiment of the present invention;

24 is an exemplary diagram for a process of providing a location based service through an IP node according to an embodiment of the present invention;

25 is an exemplary diagram for a location-based service providing process in an automobile environment according to an embodiment of the present invention;

26 is an exemplary diagram for a process of providing a location-based service in a building environment according to an embodiment of the present invention.

* Description of main parts of drawing *

100: sensor network 200: public network

300: USN server 400: user

110: sensor node 120: sink node

The present invention relates to a location-based service system and method using a geographical code in a Ubiquitous Sensor Network (USN) environment, and more particularly, to a geographical code capable of managing location information of a sensor node systematically and efficiently in a USN environment. The present invention relates to a system and a method for providing a location based service in a USN environment that can provide various location based services to a sensor node.

Much research is being conducted on USN technology that enables communication between physical space and electronic space. USN technology aims to deliver recognition information of a physical space, and USN refers to an integrated network system combining a public network and a network composed of sensor nodes that sense information of a physical space and have a communication function.

On the other hand, location-based service (LBS) is provided as an additional service type of mobile communication service and is provided as a concept of Internet service through wired / wireless communication network, thus establishing a communication infrastructure environment and increasing penetration rate of wired / wireless service. The LBS market is forming around high regions, and various application services are expected to be provided.

However, since the service is provided only when the LBS is built in a separate environment and has a global positioning system (GPS), it is difficult to provide a service in an integrated environment and the limitation of not providing a service in the absence of GPS. Have

In addition, since there are countless sensor nodes in the USN environment, problems of installation, management, and cost of the positioning device are raised. In addition, the USN environment is difficult to provide a consistent and efficient service because it is built in an integrated environment by a variety of existing network environment.

Therefore, the implementation of a system that can provide efficient and consistent location-based services in the USN environment by combining sensor node sensing and location information based on a systematic and consistent location information management code system in the USN environment. do.

The present invention has been proposed to meet the above requirements, and USN environment that can provide a variety of location-based services to the sensor node by using a geographic code that can systematically and efficiently manage the location information of the sensor node in the USN environment The purpose of the present invention is to provide a location-based service providing system and a method thereof.

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. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, the present invention provides a location-based service providing system using a geographic code in a Ubiquitous Sensor Network (USN) environment, wherein a plurality of sensor nodes for generating sensing information by performing a sensing function on a physical space are provided. A sensor network for transmitting geographical code (GGC) information for indicating the location information of the sensor node together with the sensing information, and a sensor network for connecting the sensor network to a public network. And a USN server for receiving and managing GGC information and sensing information, and providing a location-based service according to the GGC information and sensing information to a user, wherein the GGC information includes location information of a network node and management region range information. Include.

The present invention also provides a method for providing a location-based service using a geographic code in a Ubiquitous Sensor Network (USN) environment, comprising: transmitting, by a sensor node, sensing information to generate and transmit sensing information by performing a sensing function on a physical space; A GGC information generating step of generating, by the location node which is a network node holding location information, GGC information using the location information; A GGC binding step of generating GGC object information by combining the geographic code (GGC) information with the sensing information; And a service step of receiving, by the USN server, the GGC object information and combining content with the received GGC object information to a user, wherein the GGC information includes location information and management area range information of the corresponding network node. Include.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the terms used in the present invention are summarized as follows.

Network Node: A device connected to a network having a wired / wireless communication function and a data processing function, and includes a mobile station (MS), a personal digital assistant (PDA), a sensor node, a sink node, a gateway, a base station ( Base Station, BS).

Geographical Code (GGC): Location coordinate information expressed in latitude, longitude, and altitude of a network node, and code system information representing a management area range.

Location node: A network node that holds location information that exists on the network.

Locationless node: A network node that does not have location information that exists on the network, and receives location information through a location node.

Sensor Node: A device that has a sensing function and a communication function for observing and sensing a physical phenomenon, and a basic element of a sensor network.

-Sink Node: A Sink Node that performs interworking with the external network and manages sensor nodes among the sensor nodes constituting the sensor network.

Location Sensor node: A sensor node that is a location node, that is, a sensor node having location information.

Locationless Sensor Node: A sensor node that is a non-location node, ie a sensor node that does not have location information.

Binding Area: A communication management area of a location node including a locationless node that receives location information as a network coverage area configured by a location node.

1 is a diagram illustrating an embodiment of a USN to which the present invention is applied.

As shown in FIG. 1, the USN network includes a sensor network 100, a public network 200, and a USN server 300, and the user 400 is connected to the USN server 300 through the public network 200. ) Can be accessed.

The sensor network 100 is composed of a plurality of sensor nodes 100 for sensing the information of the physical space to transmit the sensing information. Among the sensor nodes, a node that performs interworking with an external network and manages other sensor nodes is called a sink node, and a node that performs sensing and transfers sensing information of another sensor node to a sink node is also called a relay node. .

Methods of collecting sensing information in the sensor network 100 include an on-demand method and an event-driven method. The on-demand method is a method of checking sensing information by requesting information of an arbitrary sensor node through a sink node, and the event-driven method is a sensing event at the sensor node 110. In this case, the sensing information is transmitted from the sensor node 110 in which the event occurs to the sink node.

The public network 200 is composed of the Internet or a mobile communication network, and is connected to the sensor network 100 to provide various public network services.

The USN server 300 manages the sensor node 110 and the sensing information and provides various services to the user 400. In order to provide the location-based service, the USN server 300 should be able to efficiently manage a large amount of sensing information and location information.

The user 400 connected to the USN server 300 through a wired / wireless network is a target for using the sensing information, and receives various services according to characteristics of the user through the USN server 300. The user 400 may be in the form of a personal computer (PC), a personal digital assistant (PDA), a mobile communication terminal, or an application server or system for performing a specific day.

FIG. 2 is a detailed configuration diagram of an embodiment of the sensor node of FIG. 1, showing a hardware configuration diagram of a general sensor node.

As shown in FIG. 2, the sensor node 110 includes a microcontroller unit (MCU) 111, a serial peripheral interface (SPI) 112, a universal asynchronous receiver transmitter (UART) 113, and an analog to digital conversion (ADC). 114, Sensor Module 115, I / O Port 116, Radio Frequency Module 117, Flash Memory 118, and Synchronous Dynamic Random Access Memory (SDRAM) 119 is configured.

MCU 113 is an integrated circuit that controls the operation or process of the components of the sensor node, SPI 112 is a serial communication device for communicating with the peripheral integrated circuit (IC), UART (113) Is an interface for communicating with and receiving data from a modem or other serial devices by providing an RS-232C interface, the ADC 114 is a device for converting an analog signal into a digital signal, and the sensor module 115 The module performs sensing, the I / O port 116 is a signal input / output port with an external device, the RF module 117 is a device for transmitting and receiving radio waves, and the flash memory 118 is stored information even when power is cut off. Is a storage device that cannot be erased, and the SDRAM 119 is a temporary storage device that stores information.

3 is a configuration diagram of various embodiments of the USN to which the present invention is applied.

As shown in FIG. 3, the USN is an Internet-based USN (General USN) in which a sensor network is connected through the Internet, or a mobile network-based USN (MS-assisted USN) in which a sensor network is connected through a mobile communication network. Are distinguished.

In the case of the Internet-based USN (General USN), the sensor network is composed of a sensor node and a sink node, and the sink node is configured to be connected to the Internet 200.

Mobile network-based USN (MS-assisted USN) is composed of sensor nodes and sink nodes, and configures the sensor network through a mobile station (MS) 700 or a base station (BS) base station (BS) such as a mobile communication terminal. Is connected to. Here, the MS 700 may perform a function of a sink node or a sensor node.

In addition, the USN is divided into a gateway-based USN through a gateway 500 and a non-gateway-based USN. By configuring the network through the gateway 500, the network environment can be efficiently managed and a private environment can be established.

In summary, the USN may be a non-gateway-based general USN (Gateway-based General USN) without a gateway, or a gateway-based general USN through a gateway, as shown, depending on the public network and the type of connection with the public network. ), A mobile network based USN (Non-Gateway-based MS-assisted USN) that does not use a gateway, and a gateway-based MSN (assisted USN) through a gateway.

4 is a configuration diagram of an embodiment of a location-based service system in the USN environment according to the present invention.

As shown in FIG. 4, the location-based service system in the USN environment according to the present invention uses the basic structure of the USN of FIG. 1 as it is, and its components maintain the general function and form in the USN environment. Detailed configuration for infrastructure service is added and implemented.

Location-based service system in the USN environment is a sensor network 100 consisting of a plurality of sensor nodes (110) for performing the sensing function for the physical space, location-based routing and GGC binding function, the Internet constituting the infrastructure Or a public network 200 such as a mobile communication network, a USN server 300 for managing sensing information and location information of the sensor node 100, and a user 400 provided with a location-based service. The location-based routing and GGC binding function of the sensor node 110 will be described later with reference to FIG. 5 along with the detailed configuration of the sensor node 110. Herein, the nodes in charge of the connection with the external network among the sensor nodes of the sensor network 100 are referred to as sink nodes as described above.

In order to provide location-based services based on such a structure, network nodes existing on a network are classified into location nodes and locationless nodes, and location nodes are used through location nodes. Locationless node) location information.

The location node has geographical code (GGC) information including location information indicating longitude, latitude, and altitude information and binding area information through GPS or user input.

As shown in FIG. 4, the sensor network 100 may be classified into a case in which only a sink node is a location node and a case in which a sensor node, which is a location node, exists in the sensor network. In this case, the method of providing location information is different.

5 is a configuration diagram of an embodiment of a location sensor node for location-based services according to the present invention.

As shown in FIG. 5, the location sensor node according to the present invention is largely divided into a hardware layer 121, a device driver layer 122, and a service module layer 123.

The hardware layer 121 and the device driver layer 122 provide communication functions and sensor control functions required for the sensor node. The hardware layer 121 uses the configuration of FIG. 2 described above.

The service module layer 123 includes a location based routing module 128 that performs a location based routing function to provide a location based service, and a GGC binding module 129 that performs a GGC binding function.

Location-based routing transmits and receives location information between sensor nodes and provides a function of forming a network around the location sensor nodes. In location-based routing, the location sensor node transmits its location information to the surrounding nodes, and the neighboring nodes establish a routing path based on the received information and form a network centered on the location sensor node. If the sensor network is mobile and dynamic, the network must be configured in a periodic manner. In location-based routing, location information is represented through GGC (geographic code) information. This location-based routing technique can be applied through existing routing techniques.

The GGC binding function refers to a function of converting and combining location information of a location node and management area information according to a predetermined code system to generate GGC information and to give GGC information to a sensor node. Through this function, the location sensor node has its own GGC information, and the non-location sensor node in the binding area of the location sensor node has the same GGC information.

The location-based routing module 128 and the GGC binding module 129 operate resident in the flash memory 118 or the SDRAM 119 of FIG. 2.

6 is a diagram illustrating an embodiment of a sensor network through location-based routing according to the present invention.

As shown in FIG. 6, the sensor network is configured in a peer-to-peer topology or a star topology based on the management area of the location node to focus on the location node. By forming a network, location-based services can be provided.

In order to construct such a network, the position sensor node broadcasts its GGC information to the surroundings, so that the surrounding non-position sensor nodes receive the position information of the broadcasted position sensor node. The non-position sensor node establishes a routing path based on the received position information of the position sensor node. As such, by forming a network configuration around the location sensor node, it is possible to provide location-based services efficiently and economically in the sensor network.

7 is an exemplary diagram illustrating an embodiment structure of a sensor network reconfigured according to a moving sensor node.

Sensor nodes on the sensor network can exist in the form of fixed and mobile. When the sensor node moves, the sensor network needs to be reconfigured, and the non-location sensor node should always be connected to the location sensor node for location-based services.

FIG. 7 illustrates a change in network configuration when a sensor node has mobility on a sensor network, and illustrates a structure of mobility management for location-based services.

As shown in FIG. 7, before the B non-position sensor node moves, the A non-position sensor node is connected to the D position sensor node through the B non-position sensor node to receive location based service.

On the other hand, after the B non-position sensor node is moved, communication with the D position sensor node becomes impossible. The B non-location sensor node searches for neighboring location sensor nodes and receives location-based services through the new location sensor node. That is, the B non-position sensor node after the movement forms a network with the E position sensor node and receives the position information through it.

Here, in the case of the A non-position sensor node, since the B non-position node cannot move and communicate with the D position sensor node, it forms a network connected to the D position sensor node through the C sensor node in the communication range. do.

8 is an exemplary diagram for explaining a generation process of GGC information according to the present invention.

In the present invention, the location information is converted into a geographical code (GGC) in the USN environment, and thereby provides a location-based service. Geographic code (GGC) not only displays location information but also provides consistent code rules, enabling efficient processing on computers and providing a unified environment for location-based services.

Geographic codes are represented as ranges for three-dimensional geographic spaces and code shaping rules are dynamically assigned along the axis, depending on the geographic characteristics or the degree of accuracy of the location information. The geographic code composed of the location node's location information and management area range information provides the same location information to non-location nodes in the location node's management area, and the accuracy of the location information is determined by the range of the management area. do.

As shown in FIG. 8, the geographic code is generated by converting and combining the geographic location information of the location node and the management area range according to a code generation rule by a predetermined code system.

The GGC information of the present invention will be described in more detail. The GGC information includes address code information indicating location information on latitude, longitude, and altitude of a corresponding network node, and a scale indicating a management area range of the corresponding network node. Contains code information.

The address code information is fixed address code information independently indicating the location information of the latitude, longitude, and altitude of the network node, and location information of the latitude, longitude, and altitude of the corresponding network node using address code information of another network node. To include relative address code information that is relative.

Geographic code (GGC) information of the present invention is described in the specification (Application No.:10-2005-124688, "Location-based service system and method using geographic code information") filed by the applicant on December 16, 2005 The disclosed geographic code (GGC information) can be used as it is. Since detailed information such as a code system, syntax, and a transformation / generation method of a geographic code is disclosed in the application specification, a more detailed description of a method of generating a geographic code will be omitted.

9 is an exemplary diagram for explaining a GGC binding function of a sensor node according to the present invention.

In order to provide location-based services in the USN environment, a sensor node performs a GGC binding function that generates or grants GGC information indicating location information and binds it to the sensor node, thereby providing location-based services to all sensor nodes. can do.

The GGC binding function is a form of direct binding where a sensor node directly holds GGC information, and indirect binding where GGC information is given by another sensor node on the network because the sensor node does not have GGC information. It is divided into (Indirect Binding) type.

As shown in FIG. 9, the direct binding may directly transmit GGC information and sensing information to the user since the sensor node has GGC information.

Indirect Binding has to be provided through the location node around because sensor node doesn't have location information. Components on the USN network that can provide location information to sensor nodes include sensor nodes, gateways (GWs), GPS, MS, BS, and Internet Protocol (IP) nodes, through which they are located at non-location sensor nodes. Information can be provided. Such indirect binding is transparently bound when data transmitted by a non-location sensor node passes through a location node.

Through such direct binding and indirect binding, location-based services can be efficiently provided to all sensor nodes existing in the USN network.

10 is an exemplary diagram for describing a location based service by direct binding according to the present invention.

Direct Binding provides location-based services directly in the environment where sensor nodes have geographic codes. As shown in FIG. 10, since the sensor node is a location sensor node having a geographical code, the location node directly provides a location-based service to the user.

This type has the advantage of providing accurate location of the sensor node, but there is a problem in that it is difficult to provide location information to all sensor nodes in the USN environment, and accordingly, a high cost is required.

Indirect binding is a method of providing GGC information to a non-location sensor node. The indirect binding provides GGC information through a location node on a network. Indirect binding may be configured in various ways according to the type of the node having the GGC information, and the accuracy of the location information is determined according to the size of the management area of the location node. For example, since the management area of the MS is smaller than the management area of the BS, the location information of the MS has higher accuracy.

FIG. 11 is an exemplary diagram for describing indirect binding using a position sensor node when the sensor network is configured with a position sensor node and a non-position sensor node according to an embodiment of the present invention.

Sensor nodes in a binding area of one location node represent the same location, and non-location sensor nodes are provided with location information through the location sensor node. The non-location sensor node transmits the sensing information to the location sensor node, and the location sensor node provides the location-based service by adding GGC information to the received information.

12 is an exemplary diagram for describing a location based service by indirect binding using a GPS node according to an embodiment of the present invention.

Location-based services can be provided through individual GPS nodes on the network. Such a GPS node may be considered as an arbitrary node installed to provide location based services in a sensor network.

As shown in FIG. 12, when a GPS node is adjacent to a sink node, the sink node is given GGC information through an adjacent GPS node existing on the sensor network, and the sensor node is located in the management area of the sink node. To provide location-based services. The non-position sensor node delivers the sensing information to the sink node, and the sink node provides the position information by adding GGC information.

FIG. 13 is an exemplary diagram for explaining indirect binding using an MS according to an embodiment of the present invention, wherein the sensor network is connected to a mobile communication network (MS-assisted USN) through an MS having location information. It shows the structure that provides location based service of network.

 The non-position sensor node transmits the sensing information to the MS, and the MS provides the position information of the non-position sensor node by combining the GGC information generated by using the position information with the received sensing information. In FIG. 13, the MS and the sink node are separated from each other. However, the MS may serve as a sink node.

14 is an exemplary diagram for explaining indirect binding by a BS according to an embodiment of the present invention.

As shown in FIG. 14, when the sensor network is connected to the mobile communication network and there is no location information of the MS, that is, when the MS is a non-location node, location information is provided through a BS having location information.

Since the management area of the BS (base station) is larger than the management area of the MS, the accuracy of the location information of the sensor node is reduced. In addition, the gateway in the USN (Gernal USN) environment in the form of a connection through the Internet can be applied in the same manner as the BS (base station).

FIG. 15 is an exemplary diagram for explaining indirect binding by an IP node according to an embodiment of the present invention, and shows a location-based service structure based on an IP address.

Since the IP address is divided into a network address and a host address, the approximate location information can be obtained from the network address. Therefore, the IP address is used as information indicating the location. Through this, an IP node having an IP address can act as a location node, and generates a geographical code through the location information mapped to the IP address and the communication range of the IP node.

Therefore, sensor nodes connected to the IP node are provided with the location-based service by indirect binding through the IP node. FIG. 15 shows that location based service is provided to a non-location sensor node when the sink node is an IP node.

16 is a diagram illustrating an embodiment of a USN server according to the present invention.

As shown in FIG. 16, the USN server 300 includes a communication management module 310 for controlling and managing general communication, and a sensor management module 320 for managing sensor nodes. ), A User Management Module (330) for managing users who are provided with location-based services, a location management module for registering / providing and managing location information of sensor nodes using GCC information. (Location Management Module) 340 and GGC Object Management Module (GGC Objet Management Module) for managing GGC objects including sensing information, geographic code (GGC) information and application data (content), Sensor database 360 for storing and managing characteristic information and sensing information of sensor nodes, location database 370 for storing and managing location information, user environment settings A user profile database 380 for storing and managing information and a content database 390 for storing and managing content.

17 is an exemplary diagram illustrating a GGC registration process of a sensor node through a location management module of a USN server according to the present invention.

The GCG registration method according to the present invention includes an explicit registration method and an implicit registration method, and FIG. 17 illustrates an explicit registration method.

As shown in FIG. 17, the sensor node registers a location in the location management module of the USN server through the GGC registration request information, and the USN server transmits the GGC registration response information to the sensor node. Thus, the location information of the sensor node is registered and managed using the geographic code GGG. An implicit registration method is a method of transparently updating a location through location information of a message transmitted to a user when a sensor node provides a service.

18 is an exemplary view for explaining a GGC object according to the present invention.

Since there are various types of data in location-based services in the USN environment, configuration and management of object units is required to manage and process them efficiently. In the present invention, such an object is defined as a GGC object. GGC objects are constructed by combining several application data (contents) based on geographic code and sensing information, and various types of GGC objects may exist according to contents. GGC objects may be classified according to urgency, real time, object size, and the like, and transmission rates, priorities, and reliability may be differently applied according to characteristics of the GGC objects. Management and creation of the GGC object is performed by the GGC Object Management Module 350 of FIG. 16.

Referring to FIG. 18, a GGC object is described in detail. The GGC network layer configures a location-based service network capable of delivering geographic code, sensing information, and content by providing a function of transmitting and receiving a GGC object. Based on this, the LBS middleware layer creates and maintains / manages GGC objects combining sensing information, other application data, and location information. LBS service objects deliver various services to users through GGC objects. The location-based routing function of the sensor node described above is implemented in the GGC network layer, and the GGC binding function is implemented in the LBS middleware layer.

19 shows a network diagram of an LBS middleware layer according to an embodiment of the present invention.

The USN server and user are configured based on general location-based middleware, and the sensor node has optimized middleware according to the characteristics and role of the sensor node due to the limitation of system resources. Based on this structure, a GGC object-based location-based service is provided.

The sensor node sends the GGC object created by the GGC binding module to the USN server based on the sensing information and the location information, and the USN server adds application data according to the service requirements of the user to the received GGC object in the GGC object management module. By transmitting to the user, the user can analyze the received GGC object to receive the appropriate service.

20 is an exemplary diagram illustrating a delivery process of a GGC object according to an embodiment of the present invention.

The sensor node in this embodiment is a non-location node which does not have position information, and the sink node is a position node which has position information.

As shown in FIG. 20, since the sensor node does not have location information, the GGC object having only sensing information is transferred to the sink node, and the sink node having location information adds its GGC information to the GGC object. Forward to USN server.

Subsequently, the USN server adds contents to the received GGC object according to the characteristics of the user and the characteristics of the service, and delivers the content to the user so that the user may be provided with various types of location-based services based on the received information of the GGC object. .

21 is a flowchart illustrating an embodiment of a process for providing location based service using a geographical code in a USN environment according to the present invention.

First, the user sends a GGC Request message including the identification information (ID) of the sensor node to the USN server, and the USN server checks the location of the sensor based on the sensor ID of the received GGC request message. It sends a GGC request message to the sensor node. If the sensor node has mobility, the sensor node registers its location with the USN server periodically or at the time of movement, and the USN server can predict the location of the moving sensor, which allows the USN server to send a GGC request message to the sensor node. Can be sent.

The sensor node receiving the GGC request message compares its ID with the received ID and transmits a GGC response message if it is identical. The location sensor node transmits the GGC information and the sensing information in the GGC response message, and the non-location sensor node transmits only the sensing information in the GGC response message. In the latter case, when the GGC response message passes through the location node, the location node adds its GGC information to the GGC response message and delivers it.

Upon receiving the GGC response message, the USN server adds the content to the GGC response message to the user according to the characteristics of the user and the service.

The following description focuses on the contents of the message rather than the message type.

FIG. 22 is a diagram illustrating a process of providing a location based service in an Internet based USN environment according to an embodiment of the present invention.

Case I of FIG. 22 is a case in which a sensor network is composed of location sensor nodes to provide GGC information, which is a location information directly, and a sensor node delivers sensing information and GGC information to a sink node. It shows the process of delivering this to the USN server and finally to the user.

In case II of FIG. 22, a location-based service is provided through a sink node, which is a location node that is in charge of communication with an external network and has location information. A non-location sensor node delivers sensing information to a sink node and sinks The node adds GGC information to the USN server, and the USN server delivers the sensing information and the GGC information to the user. Here, the service request process is the same as that of FIG. 21, and the message for the service response process is transmitted through the GGC response message.

FIG. 23 is an exemplary diagram for a process of providing a location-based service in an Internet-based USN environment through a gateway according to an embodiment of the present invention.

In the case of CASE I of FIG. 23, an example of a location-based service providing process when a gateway is a location node and a sink node provides location information of a sensor node through location information of a gateway as a non-location node It is also. The non-location sensor node delivers the sensing information to the sink node, and since the sink node does not have the location information, if the GGC information is not added and the message is transmitted to the gateway, the gateway adds the GGC information to the user.

In the case of CASE II of FIG. 23, the sink node is a location node and is an example of a process of providing location based service through the sink node. As shown in CASE II of FIG. 23, the sink node provides location information by assigning GGC information to sensing information received from a non-position sensor node.

On the other hand, the service scenario in the mobile network-based USN (MS-assisted USN) is also applied in the same manner as in the case of the Internet-based USN (General USN) environment described above.

FIG. 24 is a diagram illustrating a process of providing a location based service through an IP node according to an embodiment of the present invention, and showing a process of providing a location based service when a network node having an IP has a geographical code. have.

In the case of CASE I of FIG. 24, the sink node has location information based on its IP address as an IP node, and provides the generated GGC information to the sensor node. The non-position sensor node transmits the sensing information to the sink node, and the sink node adds the GGC information based on its location information to the user.

In the case of CASE II of FIG. 24, the gateway is an IP node, which provides location information to the sensor network through the gateway, and CASE III of FIG. 24 shows that the access gateway is an IP node, which provides location-based services. Giving.

Hereinafter, an application example of the automobile industry and an application example of a fire disaster rescue service as an embodiment of a location-based service using a geographic code (GGC) in a USN environment will be described.

FIG. 25 is an exemplary view illustrating a location-based service providing process in an automobile environment according to an embodiment of the present invention, and shows an application example of the location-based service in an automobile environment providing gas station information to an automobile driver.

As shown in FIG. 25, after checking the amount of automobile oil in a sensor node equipped with an oil gauge, the sensing information is sent to a navigation device or a portable terminal (MS) of a vehicle equipped with GPS. The location node combines the GGC information and the sensing information generated according to its location information to the USN server, and the USN server locates the gas station closest to the current location according to its management function. By providing the user as a driver to provide a convenient location-based service to the driver. Here, the geographic code GGG is expressed by the location of the location node and the management area range as described above. In general, since GPS is possible in an automobile environment, location information is acquired through GPS.

FIG. 26 is an exemplary view illustrating a process of providing a location-based service in a building environment according to an embodiment of the present invention, and shows an example of application of the location-based service for disaster relief such as a fire in a large building environment.

As shown in FIG. 26, a sensing node, which is a location node, receives sensing information detected by fire detection at a sensor node equipped with a plurality of fire monitoring sensors and temperature sensors installed in various parts of a building. In this case, the sink node combines its own geographic code (GGC) with the sensing information and transmits it to the USN server, and the USN server processes the received GGC and sensing data to process an application server such as a fire department system. By providing the location of the source of the fire, it is possible to provide location-based services that can effectively cope with disasters such as building fires. Here, the location of the fire is represented by the location of the location sensor node and the management area range according to the GGC information.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily carried out by those skilled in the art will not be described in more detail.

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 using the geographic code including the location information and the range information of the network node, it is effective to manage the location information of the sensor node in a USN environment systematically and efficiently and to provide a variety of location-based services have.

In addition, the present invention can be used in the sensor node-based location-based service technology in the USN environment, there is an effect that can be economically applied to the location-based service in a variety of USN-based network environment.

Claims (31)

A location-based service providing system using a geographic code in a USN (Ubiquitous Sensor Network) environment, A plurality of sensor nodes for generating sensing information by performing a sensing function on the physical space are connected to a network, and the geographic code (GGC) information for indicating the location information of the sensor node is detected. A sensor network for transmitting with; And A USN server connected to the sensor network via a public network to receive and manage GGC information and sensing information of the sensor node, and to provide a location-based service according to the GGC information and sensing information to a user; The GGC information is, A location-based service providing system using a geographic code in a USN environment, characterized in that it includes location information of a network node and management area range information. The method of claim 1, The plurality of sensor nodes, A position sensor node which holds its position information; And Non-position sensor node that does not have its own location information Including, The position sensor node, Location-based service providing system using a geographic code in the USN environment, characterized in that to generate GGC information using its own location information. The method of claim 2, The position sensor node, Location-based service providing system using a geographic code in the USN environment, characterized in that for transmitting the sensing information combined with its own GGC information. The method of claim 2, The non-position sensor node, Transmits its sensing information to the location sensor node, The position sensor node, In order to give location information to the non-position sensor node, location-based service providing system using a geographic code in the USN environment, characterized in that the combined information transmitted to the GGC information received from the non-position sensor node. . The method of claim 2, The position sensor node, Sensing means for generating sensing information by performing a sensing function; Communication means for performing a communication function with an external device; Storage means for storing and managing the sensing information and GGC information; GGC binding means for performing a GGC binding function for generating and granting GGC information; Location-based routing means for performing a location-based routing function for broadcasting a GGC information to form a network around the location sensor node; And Control means for controlling the components of the position sensor node Location-based service providing system using a geographic code in the USN environment, including. The method of claim 1, The USN server, Communication management means for controlling and managing communication with the outside; Sensor management means for managing the sensor node; User management means for managing the user receiving a location based service; Location management means for registering / providing and managing location information of said sensor node using geographical code (GGC) information; And GGC object management means for managing GGC objects, including sensing information, geographic code (GGC) information, and application data (content) Location-based service providing system using a geographic code in the USN environment, including. The method of claim 6, The USN server, A sensor database for storing and managing characteristic information and sensing information of the sensor node; A location database for storing and managing location information; A user profile database for storing and managing user environment information; And Content database for storing and managing content Location-based service providing system using a geographic code in the USN environment further comprising. The method of claim 1, The sensor network, Location node, a network old man holding his location information More, The location node, Location-based service using geographic code in the USN environment, which generates GGC information using its own location information, combines GGC information with sensing information of the sensor node, and gives location information to the sensor node. Provide system. The method of claim 8, The location node, Location-based service providing system using the geographical code in the USN environment, characterized in that the sensor node. The method of claim 8, The location node, Location-based service providing system using a geographic code in the USN environment, characterized in that the sink node. The method of claim 8, The location node, Location-based service providing system using a geographical code in the USN environment, characterized in that the gateway. The method of claim 8, The location node, Location-based service providing system using a geographic code in the USN environment, characterized in that the mobile communication terminal. The method of claim 8, The location node, Location-based service providing system using a geographic code in the USN environment, characterized in that the base station. The method of claim 8, The location node, Location-based service providing system using a geographic code in the USN environment, characterized in that the GPS node. The method of claim 8, The location node, Is an IP node with an IP address, The IP node, Location-based service providing system using a geographic code in the USN environment, characterized in that for generating GGC information using the location information generated using its own IP address. The method of claim 1, The public network, Location-based service providing system using the geographical code in the USN environment, characterized in that the Internet. The method of claim 1, The public network, Location-based service providing system using a geographical code in the USN environment, characterized in that the mobile communication network. The method of claim 1, The GGC information is, Address code information indicating location information on latitude, longitude, and altitude of the corresponding network node; And Scale code information indicating the scope of the management area for that network node Location-based service providing system using a geographic code in the USN environment, including. The method of claim 18, The address code information, Fixed address code information that uniquely represents location information for latitude, longitude, and altitude of the network node; And Relative address code information, which shows the location information of latitude, longitude, and altitude of the corresponding network node relatively using address code information of another network node. Location-based service providing system using a geographic code in the USN environment, comprising a. A location-based service providing method using a geographic code in a USN (Ubiquitous Sensor Network) environment, A sensing information transmission step of generating and transmitting sensing information by a sensor node performing a sensing function on a physical space; A GGC information generating step of generating, by the location node which is a network node holding location information, GGC information using the location information; A GGC binding step of generating GGC object information by combining the geographic code (GGC) information with the sensing information; And A service step of receiving, by the USN server, the GGC object information, combining content with the received GGC object information, and transmitting the content to a user; Including but not limited to: The GGC information is, A location-based service providing method using a geographic code in a USN environment, comprising location information of a network node and management area range information. The method of claim 20, The location node, Location-based service providing method using a geographic code in the USN environment, characterized in that the location sensor node having its own location information. The method of claim 21, The GGC binding step, A direct binding step of generating and transmitting GGC object information by combining the GGC information generated by the location sensor node using its location information with its own sensing information. Location-based service providing method using a geographic code in the USN environment, including. The method of claim 20, The GGC binding step, Receiving, by the location node, sensing information from a non-location sensor node that does not hold location information; An indirect binding step in which the location node generates and transmits GGC object information by combining its GGC information with sensing information received from the non-location sensor node; Location-based service providing method using a geographic code in the USN environment, including. The method of claim 23, The location node, Location-based service providing method using a geographic code in the USN environment, characterized in that the sensor node. The method of claim 23, The location node, Location-based service providing method using a geographic code in the USN environment, characterized in that the sink node. The method of claim 23, The location node, Location-based service providing method using a geographic code in the USN environment, characterized in that the gateway. The method of claim 23, The location node, Location-based service providing method using a geographic code in the USN environment, characterized in that the mobile communication terminal. The method of claim 23, The location node, Location-based service providing method using a geographic code in the USN environment, characterized in that the base station. The method of claim 23, The location node, Is an IP node with an IP address, The IP node, Method of providing a location-based service using a geographic code in the USN environment, characterized by generating GGC information using location information generated using its own IP address. The method of claim 20, The GGC information is, Address code information indicating location information on latitude, longitude, and altitude of the corresponding network node; And Scale code information indicating the scope of the management area for that network node Location-based service providing method using a geographic code in the USN environment, including. The method of claim 30, The address code information, Static address code information that uniquely represents location information for the latitude, longitude, and altitude of the network node; and Relative address code information, which shows the location information of latitude, longitude, and altitude of the corresponding network node relatively using address code information of another network node. Location-based service providing method using a geographic code in the USN environment, comprising a.

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