KR101720316B1 - Method and apparatus for providing information for sensor network - Google Patents

Abstract

The sensor network information providing apparatus receives the sensing information including the sensing value obtained from the sensor resources from the sensor network middleware, converts the sensing information into a resource description framework (RDF) form, and stores the sensing information in the RDF storage unit. In accordance with a query provided by the application service, information corresponding to the query is retrieved from the information stored in the RDF storage unit and provided to the application service.

Description

TECHNICAL FIELD [0001] The present invention relates to a sensor network information providing method and apparatus,

The present invention relates to a method and apparatus for providing information on a sensor network.

A service using a sensor network or a ubiquitous sensor network (USN) generally collects data from a sensor, analyzes the data, and processes the information as useful information for the service. The unprocessed state of the sensor or sensor network and its significance can only be known by experts in the field or by some specialized developers.

In the future, if sensor networks or USN technologies are widely spread and spread in the future, USN infrastructure can be easily accessed and USN-based services can be received. However, unprocessed sensor data and sensing values that can be obtained from a sensor or sensor network are managed in a separate, independent data representation manner. It is therefore difficult for different services to utilize and analyze these sensor data and sensing values together.

In addition, the conventional sensor network and USN service are developed and constructed for closed service only for the corresponding service. Therefore, there is no open API (application program interface) for standardized data representation or service development, so that various services can not utilize sensing data or sensing values together.

In addition, when USN middleware supporting connection of heterogeneous sensor networks is used, raw data and sensed values can be obtained from the sensor network and USN. However, USN middleware has various meanings of data of sensor network and USN resource, No information is provided. Therefore, it is difficult to infer common semantic information about various information provided from heterogeneous sensor networks, and each service must individually search for sensor resources, infer information reasoning and semantic information extraction, and thus the service development becomes complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for processing various data obtained from a sensor network by processing standardized semantic information.

Another object of the present invention is to provide a method and apparatus for providing semantic USN information corresponding to a service request requested from a service apparatus.

A method according to the present invention is a method for providing sensor network information in a device connected to a sensor network middleware, the device receiving sensing information including a sensing value obtained from sensor resources from a sensor network middleware; Converting the sensing information into a resource description framework (RDF) format and storing the converted sensing information in an RDF storage unit; Analyzing a query provided by the application service; And retrieving information corresponding to the query from the information stored in the RDF storage unit based on the analysis result and providing the retrieved information to the application service.

The method may further include performing inference based on the RDF type sensing information stored in the RDF storage unit and storing semantic information according to the inference result in the RDF storage unit. In this case, when the query is the semantic information inquiry query, the step of providing the application service may be a query execution result based on the RDF type information stored in the storage unit. The query execution result may include sensor resource metadata, And includes inferred semantic information to the application service.

In addition, the method may further include storing sensing information received from the sensor network middleware in a sensing information storage unit; And providing the sensing information stored in the sensing information storage unit to the application service when the query is a non-real-time sensing value inquiry query based on the analysis result.

In this case, the step of providing the sensing information stored in the sensing information storage unit as the application service may include providing the sensing information as a service when the non-real-time sensing value inquiry query is a one-time sensing information query; And providing the sensing information to the application service based on the previously stored push service delivery address when the non-real-time sensing value inquiry query is the event sex sensing information inquiry or the periodic sensing information inquiry.

Generating a middleware query corresponding to the query and transmitting the query to the sensor network middleware when the query is a real-time sensing value inquiry query based on the analysis result; Acquiring sensing information including a sensing value corresponding to the middleware query from the sensor network middleware; And providing the obtained sensing information to the application service.

The method may further include generating a new sensor community based on the information stored in the RDF storage unit if it is determined that the sensor community creation is required based on the analysis result.

In this method, receiving an identifier allocation request for a sensor resource from the sensor network middleware; Assigning an ID and a URL (uniform resource locator) as an identifier to the sensor resource and transmitting the allocated information to the sensor network middleware; Receiving middleware connection information and operation state information on sensor resources from the sensor network middleware; And converting and storing the allocated information, the connection information, and the operation state information to the RDF storage unit.

According to another aspect of the present invention, there is provided an apparatus for providing sensor network information, the apparatus being connected to a sensor network middleware, the middleware interface processing unit performing an interface with the sensor network middleware; A middleware query processing unit receiving sensing information including sensing values obtained from sensor resources from the sensor network middleware through the middleware interface processing unit; An RDF converter for converting the sensing information into a resource description framework (RDF) format; A storage unit for storing RDF information including the RDF type sensing information; A query analyzer for analyzing a query provided from an application service; And a query processor for searching for information corresponding to the query from the information stored in the RDF storage unit based on the analysis result and providing the retrieved information to the application service.

The sensor network middleware may further include a sensing information storage unit for storing sensing information received from the sensor network middleware without performing RDF conversion.

In this case, if the query is the semantic information inquiry query, the query analyzer generates a SPARQL (SPARQL Protocol and RDF Query Language) query for the query and transmits the query to the query processor. A second query generator for generating a query corresponding to the type of the sensing information storage unit and transmitting the generated query to the sensing information storage unit when the query is a non-real-time sensing value inquiry query; A third query generator for generating a middleware query corresponding to the sensor network middleware if the query is a real time sensing value inquiry query; And a fourth query generator for generating a community sensing value inquiry request when it is determined that continuous sensing value inquiry for a specific set of sensors is required based on the analysis result in the case that the inquiry is a community related query.

Here, the middleware query is transmitted to the corresponding sensor network middleware through the middleware interface processing unit, and the response value of the sensor network middleware for the middleware query is provided to the query analyzing unit or stored in the sensing information storage unit, And a middleware query processing unit for providing the converted data to the conversion unit.

And a community management unit for generating a new sensor community based on the information stored in the RDF storage unit when it is determined that the sensor community creation is required based on the analysis result.

On the other hand, the query analyzing unit analyzes the semantic information inquiry query based on the RDF type information stored in the RDF storage unit. The query execution result includes sensor resource metadata, sensing value, and inferred semantic information Can be provided to the application service.

The apparatus may further include a semantic reasoning unit for performing inference based on the RDF-type sensing information stored in the RDF storage unit and storing the semantic information according to the inference result in the RDF storage unit.

In addition, when the non-real-time sensing value inquiry query is an event sensing information inquiry or a periodic sensing information inquiry, the push service unit may provide the sensing information to the application service based on a previously stored push service delivery address.

In addition, an ID and a URL (uniform resource locator) are allocated according to a request for allocating an identifier for a sensor resource from the sensor network middleware, and the allocated information is converted into an RDF form through the RDF transform unit and stored and managed in the RDF storage unit An ID management unit; And a catalog service unit for receiving operation state information on middleware connection information and sensor resources from the sensor network middleware, converting the information into RDF form through the RDF transform unit, and storing and managing the RDF form in the RDF storage unit have.

According to the embodiment of the present invention, information and sensing information of resources of various sensor networks constructed and operated in different forms can be provided through semantic processing, which is a common information presentation method. Therefore, various services can share information and sensing information about resources of various sensor networks, and other information and situations can be inferred using such information.

Also, a query execution result including a sensing information of a quality required by a user and a service can be provided by analyzing a query requested by various services.

In addition, it can respond to the dynamic network connection and termination of the USN resource through the provision of the catalog service that provides the identifier allocation for the USN resource and the information for the connection with the USN resources, the operation status information of the USN resources, The mobility of USN resources can also be supported.

1 is a diagram illustrating a structure of a sensor network information providing apparatus according to an embodiment of the present invention.
2 is a diagram illustrating a structure of a query analysis unit according to an embodiment of the present invention.
3 is a diagram illustrating a structure of an RDF conversion unit according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a process of registering a USN resource in a method of providing sensor network information according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a relationship between components of the USN resource registration process .
FIG. 6 is a flowchart illustrating a process of inquiring information of a USN resource in a sensor network information providing method according to an embodiment of the present invention, and FIG. 7 is a diagram illustrating a relationship between respective components according to a USN information inquiry process.
FIG. 8 is a flowchart illustrating a method of reporting and delivering a unidirectional sensing value in the method of providing sensor network information according to an exemplary embodiment of the present invention, and FIG. 9 is a diagram illustrating a relationship among components according to a sensing value report delivery process.
FIG. 10 is a diagram illustrating a relationship among components according to a non-real time sensing value inquiry processing process in the sensor network information providing method according to the embodiment of the present invention.
FIG. 11 is a flowchart illustrating a real-time sensing value inquiry query process in the sensor network information providing method according to an exemplary embodiment of the present invention, and FIG. 12 is a diagram illustrating a relationship between components according to a real- .
FIG. 13 is a flowchart illustrating a semantic USN inference process in the method of providing sensor network information according to an embodiment of the present invention, and FIG. 14 is a diagram illustrating a relationship among components according to a semantic USN inference process.
FIG. 15 is a diagram illustrating an association relationship among components according to a USN community creation and management process in a sensor network information providing method according to an embodiment of the present invention; FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, a method and apparatus for providing sensor network information according to an embodiment of the present invention will be described with reference to the drawings.

1 is a diagram illustrating a structure of a sensor network information providing apparatus according to an embodiment of the present invention.

1, a sensor network information providing apparatus 1 according to an embodiment of the present invention communicates with service apparatuses 2 providing different application services, and includes a plurality of sensor networks (here, 32 communicate with USN middleware 41, 42 that are connected to the USN (ubiquitous sensor network) (e.g., but not limited to) 31, 32, 33. The sensor network information providing apparatus 1 processes and stores data obtained from the USN middleware 41 and 42 as semantic information and responds to the service request from the service apparatus 2 by utilizing a semantic technology.

The service apparatus 2 is a device for providing a service (application service A, application service B, etc.) based on information collected through the USNs 31, 32 and 33. For example, And remote energy management services. The service device 2 can receive information on sensor resources, i.e., metadata of USN resources and sensing values of USN resources, through the sensor network information providing apparatus 1 according to the embodiment of the present invention. When the service device 2 desires a real-time sensing value, it may request a sensing value by designating a sensor or USN. If there is no information about the USN to be provided, the service apparatus 2 can obtain relevant information from the sensor network providing apparatus 1 through various search requests such as keyword search and location based search.

For example, when providing the environment monitoring service, when it is desired to receive environment information within 10 km around the user based on the location information of the user, the service device 2 stores the position of the current user in the sensor network information providing device 1 as a reference To request a list of environmental sensors that are within 10 km radius. That is, the service apparatus 2 requests the sensor network information providing apparatus 1 for the environment information sensing value and the status information of the entire environmental sensor list or selected sensors, and processes the sensing value and the status information in response to the service UI user interface).

The USNs 31, 32, and 33 include a plurality of USN resources. The USN resource includes at least one of a sensor node or an actuator node, a sensor group including a plurality of sensor nodes, or a driver group consisting of a plurality of actuator nodes.

The USN middleware 41 and 42 provide information provided from the USN to the sensor network information providing apparatus 1 between the USN and the sensor network information providing apparatus 1, Command to the corresponding USN. In addition, metadata of USN resources is stored and managed.

1, the sensor network information providing apparatus 1 includes a query analysis unit 11, a query processing unit 12, a sensing information storage unit 13, a USN community management unit 14, a push service A middleware query processing unit 16, a middleware interface processing unit 17, an RDF (resource description framework) conversion unit 18, an RDF storage unit 19, a semantic reasoning unit 20, an ID management unit 21, , And a USN catalog service unit 21.

The query analysis unit 11 analyzes the query requested by the service apparatus 2 and requests the query processing unit 12 for related information based on the analysis result. Specifically, the query analyzing unit 11 classifies the query requested by the service apparatus 2 into a semantic USN information inquiry query, a non-real-time sensing value inquiry query, a real-time sensing value inquiry query, and a USN community related query. Based on the classification result, the semantic USN information inquiry query and the non-real-time sensed value inquiry query are transmitted to the sensing information storage unit 13 to request related information, and the real-time sensed value inquiry query is transmitted to the middleware query processing unit 12 Related information, and sends the USN community related inquiry to the USN community management unit 14 to request related information. Meanwhile, the query analyzer 11 can request the USN community management unit 14 to divide the query into a plurality of USN middleware to inquire the sensed value of the community selected or generated.

The query analyzer 11 responds to USN resource information (including metadata), sensing values, and inferred semantic information stored in the RDF storage unit 19 with respect to the semantic USN information query query. Since the non-real-time sensing value inquiry query does not require the user or the service apparatus to request the real-time sensing value, the query analyzing unit 11 may calculate the sensing values (the previous query request or the pushing request) stored in the sensing information storage unit 13, (Sensing values transmitted and stored to the sensor network information providing apparatus 1 by a sensor having push characteristics). The middleware real-time sensing value inquiry requests the sensing value of the current time in real time. The query analyzing unit 11 responds to the latest sensing value after the current time acquired through the USN middleware. For USN community related inquiries, respond to information related to the USN community.

Fig. 2 is a diagram showing a concrete structure of this query analyzing unit 11. Fig.

2, the query analysis unit 11 includes a query classifier 111, a first query generator 112, a second query generator 113, a third query generator 114, and a fourth query And a generator 115.

The query classifier 111 classifies a query (hereinafter referred to as an input query) provided from the service apparatus 2 and classifies it into one of the four queries as described above.

The first query generator 112 generates a SPARQL (SPARQL Protocol and RDF Query Language) query for the query if the input query from the service device 2 is a semantic USN information query query and sends it to the query processor 12 do. SPARQL is the W3C standard for the Semantic Web standard query language. The first query generator 112 knows the ontology schema of the USN resources and the USN community (also known as the sensor community) in the RDF store 19 needed to generate the SPARQL query. The first query generator 112 may be referred to as a "SPARQL query generator. &Quot;

When the input query from the service device 2 is a non-real-time sensing value inquiry query, the second inquiry generator 113 generates a structured query language (SQL) / native API query for the query and generates a query based on the generated query The sensing information storage unit 13 is inquired. The second query generator 113 generates an SQL query for the input query when the sensing information storage unit 13 is an RDB (Relational DB). The second query generator 113 also generates an SQL query for the input query where the sensing information storage unit 13 is NoSQL DB The second query generator 113 can be named as "SQL / native API query generator ".

When the input query from the service device 2 is a real-time sensing value inquiry query, the third query generator 114 generates a query according to the API provided by the USN middleware. The third query generator may be named "USN middleware query generator ".

If the input query from the service device 2 is a USN community-related query, the fourth query generator 115 determines that a continuous sensing value inquiry for a specific set of sensors is required based on the analysis result, the USN community sensing value inquiry Create a request. The fourth query generator 115 may query the USN community management unit 14 to see if there is a USN community corresponding to the input query and request a USN community creation corresponding to the analysis result if it does not exist. This fourth query generator 115 may be named "USN Community Manager Query Generator ".

On the other hand, the query processing unit 12 processes a query (in particular, a SPARQL query) provided from the query analysis unit 11, and the USN resource information (including meta data) stored in the RDF storage unit 19 ), The sensing value, and the inferred semantic information. The query processing unit 12 can simultaneously process a plurality of SPARQL queries, searches for triples in the RDF storage unit 19, constructs a response to the query, and provides the query to the query analysis unit 11. [

The sensing information storage unit 13 stores information of sensing values transmitted to the sensor network information providing apparatus 1 by a sensor having a previous query request or push characteristic. And responds to the corresponding sensing value according to the SQL / Native API query corresponding to the non-real-time sensing value inquiry query provided from the query analyzing unit 11. [

The USN community management unit 14 responds to the information request of the USN community related inquiry in response to the corresponding USN community related information. Here, the USN community represents a logical sensor network constructed based on USN resources required to perform a predetermined service.

The USN community management unit 14 determines whether the community can be configured based on the USN resource (sensor or the like) corresponding to the USN community requested to the RDF storage unit 19 in accordance with the USN community related request transmitted from the query processing unit 12, And whether the corresponding USN resource already belongs to another community. Based on the response in response to the request, the query analyzer 11 answers whether there is a USN community available to the query analyzer 11 and information related to the USN community. If no usable USN community exists, create a new USN community.

The USN community management unit 14 creates a USN community by requesting from the service apparatus 2 or a user, and manages a list of USN resources (sensors, sensor nodes, actuator nodes, etc.) belonging to the created community. In addition, it generates, maintains, and manages information such as the configuration purpose, the creator, and the control right of the USN community. The USN community has a life cycle according to the persistence of the service after creation, and the USN community management unit 14 manages the life cycle of each USN community. The USN community can perform various computations and functions such as periodic sensing of sensors in a sensor network, extraction of average value of sensed values, and driver control when an event occurs, depending on the purpose.

The push service section 15 provides information to the service apparatus 2 in a pushing method that can not respond to the request immediately. The push service unit 15 delivers an asynchronous information response message to a request that can not be immediately responded to, such as periodic sensing value inquiry, event property inquiry, context awareness / speculation information. The service apparatus 2 can register the destination address to which the asynchronous response message is to be received when the query is requested. The push service unit 15 transmits a message including the related information according to the protocol promised to the destination address provided from the service apparatus 2. [ The push service unit 15 may also be referred to as a push service engine.

The middleware query processing unit 16 is transmitted from the USN middleware 41 and 42 through the middleware interface processing unit 17 according to a query (for example, a real time sensing value inquiry query) transmitted from the query analyzing unit 11 And responds with information including the sensing value.

The middleware query processor 16 generates a query to be sent to the USN middleware 41 or 42 based on the query transmitted from the query analyzer 11 and transmits the query to the USN middleware 41 and 42 ). The middleware query processing unit 16 performs query state management and periodic sensing value delivery for each of a plurality of middleware queries. In addition, the sensing values received from the USN middleware 41 and 42 may be stored in the sensing information storage unit 13 so that they can be utilized or referred to for other services.

The types of queries provided by USN middleware include one-time queries, continuity queries, and event-quality queries. The one-time query is a query that requests the USN middleware to query the sensor value once, receives the response to the query, and delivers the sensing value to the application service. The continuity query requests the sensing value continuously for a predetermined period according to the period requested by the application service. The middleware query processing unit 16 transmits the continuity query to the USN middleware. Based on the sensing value periodically obtained according to the continuity query, , The middleware query processing unit 16 performs periodic sensing value reporting. The periodic sensing value is transmitted to the service apparatus 2 via the push service unit 15. The event property query is a query that sends the sensing value to the application service when an event is detected through calculation on the sensing value. In this case, the query analyzing unit 11 performs a predetermined operation based on the sensing value transmitted from the middleware query processing unit 16, and when an event such as a predetermined condition is satisfied, To the service apparatus 2 via the Internet. At this time, the middleware query processing unit 16 may perform an operation on the sensing value. When the delivery of the query response is completed through the push service unit 15, the query is terminated.

In addition, the middleware query processing unit 16 performs control and message management for the unidirectional sensing value report. The unidirectional sensing value report reports the sensing value after the USN resource performs sensing at predetermined intervals, and receives the sensing value report message from the USN middleware and transmits it to the sensor network information providing apparatus 1. The middleware query processing unit 16 receives the unidirectional sensing value report message through the middleware interface unit 17, stores the information included in the unidirectional sensing value report message in the sensing information storage unit 13, To the RDF conversion unit 18.

The middleware interface processing unit 17 interfaces with the USN middleware 41 and 42, and functions are divided into protocol processing and message processing. The middleware interface processing unit 17 may be mounted in a module form according to the communication and message standard with the USN middleware.

The RDF conversion unit 18 performs RDF conversion on the information transmitted from the USN middleware 41 and 42 to the sensor network information providing apparatus 1 and stores the converted information in the RDF storage unit 19. USN information such as meta data of USN resources transmitted from the USN middleware and sensing values of USN resources are stored in the RDF storage unit 19 via the RDF conversion unit 18.

3 is a diagram illustrating a structure of an RDF conversion unit according to an embodiment of the present invention.

3, the RDF conversion unit 18 includes a verification unit 181, a conversion analysis unit 182, a converter engine 183, and a mapping unit (not shown) in which mapping rules are stored 184, and a collecting unit 185 in which a collection rule is stored.

The verification unit 181 performs validation of USN information such as metadata of USN resources and sensing values of USN resources. In particular, it verifies the type of document or file which is input information.

The conversion analysis unit 182 analyzes the document or file before conversion.

The translator engine 183 converts the information to RDF information based on the analysis results, and performs conversion based on rules for converting the structured information to RDF, such as XML or legacy DB.

The RDF storage unit 19 stores RDF information provided from the RDF conversion unit 18. Therefore, USN information such as meta data for USN resources and sensing values of USN resources are processed and stored in the form of RDF.

The semantic reasoning unit 20 is an engine for inferring a specific situation modeled on an ontology stored as an RDF. The semantic reasoning unit 20 extracts an event for contextual reasoning based on real-time sensor information and deduces a situation from an event. The inferred information is stored again in the RDF storage unit 19 and can be utilized in other services.

The ID management unit 21 manages IDs and URIs (Uniform Resource Locators), which are identifiers of USN resources, and maps and manages the addresses and identifiers of USN resources used by the sensor network information providing apparatus 1 and the USN middleware. When the USN resource is connected to a network such as the Internet, the ID and address of the USN resource can be automatically registered in the ID management unit 21 in the sensor network information providing apparatus 1, ) To support the acquisition and utilization of USN resource information.

The USN catalog service unit 22 assists the USN resource to actively register its own status information and connection information, and transmits the registered information to the USN middleware and the sensor network information providing apparatus 1, Supports mobility support.

The ID manager unit 21 and the USN catalog service unit 22 support a Plug and Play function so that the USN resource is automatically connected to the sensor network information providing apparatus 1, (Identifier, connection information, and the like), thereby enabling the sensor network information providing apparatus 1 to dynamically use the registered information.

Next, the sensor network information providing method according to the embodiment of the present invention will be described based on the sensor network information providing apparatus 1 having such a structure.

First, the semantic registration process of the USN resource will be described.

FIG. 4 is a flowchart illustrating a process of registering a USN resource in a method of providing sensor network information according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a relationship between components of the USN resource registration process .

As shown in FIG. 4, the USN resource (for example, 31) to be connected to the network requests the USN middleware 41 to allocate its own identifier ID. The USN middleware 41 transmits an ID allocation request to the sensor network information providing apparatus 1 in order to allocate the ID of the newly connected USN resource 31. [ 5, the ID allocation request from the USN middleware 41 is received via the middleware interface processing unit 17 and transferred to the ID management unit 21 (S100).

The ID management unit 21 of the sensor network information providing apparatus 1 allocates an ID and a URL as an identifier to the corresponding USN resource 31 according to the input ID allocation request (S110). 5, the ID management unit 21 performs RDF conversion on the information (ID, URL, etc.) allocated to the USN resource 31 and stores the information in the RDF storage unit 19 (S120).

The middleware interface processing unit 17 receives middleware connection information (for example, IP address or port number) and operation state information (sensing type of USN resource, operation or the like) from the USN middleware 41 with respect to the USN resource 31, And transmits it to the USN catalog service unit 22 (S130). 5, the USN catalog service unit 22 converts the middleware connection information and the operation state information of the USN resource into the RDF and stores it in the RDF storage unit 19 (S140).

The middleware interface processing unit 17 also collects metadata of the USN resource 31 from the USN middleware 41 and transfers the collected metadata to the RDF conversion unit 18 (S150). The RDF converting unit 18 converts the meta data information of the USN resource into RDF and stores it in the RDF storing unit 19 (S160).

Through the registration process as described above, the USN resource is registered in the sensor network information providing apparatus 1, and information is provided on the basis of the registered USN resources.

FIG. 6 is a flowchart illustrating a process of inquiring information of a USN resource in a sensor network information providing method according to an embodiment of the present invention, and FIG. 7 is a diagram illustrating a relationship between respective components according to a USN information inquiry process.

When a query is generated in the application service, the service device 2 transmits the query to the sensor network information providing device 1 as shown in FIG. 6 (S200). The query analyzing unit 11 of the sensor network information providing apparatus 1 analyzes the inputted query and sends a query (for example, a semantic USN information inquiry query) to the query processing unit 12 ). The query processing unit 12 processes the input query to generate a SPARQL query (S210).

The query processing unit 12 transmits the generated SPARQL query to the RDF storage unit 19 and retrieves RDF information about the corresponding USN resource (S220). The query analyzing unit 11 transmits the search result and the query result (e.g., USN resource metadata, sensing value, inferred semantic information, etc.) to the query analyzing unit 11, (S230, S240), the service execution unit 2 converts the query execution result according to the message specification with the application service.

Metadata, sensing value, inferred semantic information, and the like of the USN resource stored in the RDF format can be transmitted to the application service through the information inquiry process for the USN resource.

FIG. 8 is a flowchart illustrating a method of reporting and delivering a unidirectional sensing value in the method of providing sensor network information according to an exemplary embodiment of the present invention, and FIG. 9 is a diagram illustrating a relationship among components according to a sensing value report delivery process.

The USN resource (e.g., 31) collects sensing information according to a predetermined period and delivers it to the USN middleware (for example, 41). The USN middleware 41 transmits sensing information (including a sensing value) of the USN resource to the middleware interface processing unit 17 of the sensor network information providing apparatus 1.

As shown in FIG. 8, when USN resource sensing information is input from the USN middleware, the middleware interface processing unit 17 transmits sensing information to the middleware query processing unit 16 (S300), as shown in FIG. The middleware query processing unit 16 stores the sensing information in the sensing information storage unit 13 (S310). 9, the middleware query processor 16 transfers the sensing information to the RDF converter 18. The RDF converter 18 converts the sensing information to RDF and stores the sensing information in the RDF storage 19 (S320).

As the new sensing information is stored in the RDF storage unit 19, the semantic reasoning unit 20 performs inference based on the newly added (or changed) sensing information, and supplies the semantic information according to the inference result to the RDF storage unit 19 (S330). The inferred semantic information may be responded to by an application service corresponding to the USN resource information inquiry query.

On the other hand, the non-real-time sensing value inquiry processing can be performed based on the sensing information stored as described above.

FIG. 10 is a diagram illustrating a relationship among components according to a non-real time sensing value inquiry processing process in the sensor network information providing method according to the embodiment of the present invention.

10, when the query analyzing unit 11 analyzes the query input from the service apparatus 2, the query analyzing unit 11 determines whether the query information is stored in the sensing information storage unit 13 ) And acquires sensing information on the corresponding USN resource. If the non-real-time sensing value inquiry query is the one-time sensing information query, the sensing information (including the sensing value) is directly transmitted to the service device 2.

On the other hand, when the non-real-time sensing value inquiry query is the periodic sensing information inquiry or the event-sensitive sensing information inquiry, the sensing information is transmitted through the push service unit 15. In this case, the push service unit 15 pushes the sensing information to the service apparatus 2 according to the set period or pushes the sensing information to the service apparatus 2 when the predetermined event is satisfied.

FIG. 11 is a flowchart illustrating a real-time sensing value inquiry query process in the sensor network information providing method according to an exemplary embodiment of the present invention, and FIG. 12 is a diagram illustrating a relationship between components according to a real- .

When a query is generated in the application service, the service device 2 forwards the query to the sensor network information providing device 1, as shown in Fig. 12, the query analyzing unit 11 of the sensor network information providing apparatus 1 analyzes the inputted query (S400). If the query is a real-time sensing value inquiry query, the query is transmitted to the middleware query processing unit 17, .

The middleware query processing unit 17 generates a real-time middleware query corresponding to the inputted real-time sensing value inquiry query and transmits it to the middleware interface processing unit 17 (S410).

The middleware interface processing unit 17 transmits the middleware query to the USN middleware (S420). Accordingly, the USN middleware requests a response according to the real-time middleware query to the USN and receives a response thereto, that is, a real-time sensing value. The real-time sensing value for the query from the USN is transmitted to the middleware query processing unit 16 through the USN middleware and the middleware interface processing unit 17 as shown in FIG. 12 (S430).

The middleware query processing unit 16 transfers the real-time sensing value from the USN to the query analysis unit 11. [ If the type of the real-time sensing value inquiry query is a one-time response, the query analyzing unit 11 immediately transmits the real-time sensing value to the service apparatus 2 (S440).

On the other hand, when the type of the real-time sensing value inquiry query is the periodic sensing information inquiry or the event sensing information inquiry, the sensing information is transmitted through the push service unit 15. [ In this case, the push service unit 15 pushes the sensing information to the service apparatus 2 according to the set period or pushes the sensing information to the service apparatus 2 when the predetermined event is satisfied.

FIG. 13 is a flowchart illustrating a semantic USN inference process in the method of providing sensor network information according to an embodiment of the present invention, and FIG. 14 is a diagram illustrating a relationship among components according to a semantic USN inference process.

The application service may request semantic reasoning. Accordingly, the service apparatus 2 transfers the semantic reasoning request query to the sensor network information providing apparatus 1.

13, when the semantic reasoning request query is input, the query analyzing unit 11 receives the push service delivery address from the service device 2 and registers the same in steps S500 and S510. Then, the query analyzing unit 11 generates a SPARQL query for semantic reasoning and transmits it to the query processing unit 12 (S520). The query processing unit 12 transfers the semantic reasoning query to the RDF storage unit 19 as shown in FIG. 14 (S530).

Meanwhile, the middleware interface processing unit 17 receives the sensing information response by transmitting the query request to the USN middleware 41, 42 or receiving the sensing information response through the unidirectional sensing value report as described above. The middleware interface processing unit 17 transmits a sensing value report message including the response (sensing value) of the query to the middleware query processing unit 16 (S540)

The middleware query processor 16 transfers the sensing value received from the USN middleware to the RDF converter 18. The RDF converter 18 converts the sensed value to RDF and stores the sensed value in the RDF storage 19 S550). 14, sensing values are obtained from the USNs, converted into RDFs, and stored in the RDF storage unit 19 through sensing values acquisition steps (S40 and S50) as described above.

The semantic reasoning unit 20 performs inference using the sensed value RDF information stored in the RDF storage unit 19 and stores the inference result in the RDF storage unit 19 at steps S560 and S570. The result of the semantic reasoning occurs asynchronously. The query processing unit 12 transfers the semantic reasoning result stored in the RDF storage unit 19 to the push service unit 15 and provides the semantic reasoning result to the service apparatus 2 (S580). The push service unit 15 provides the semantic reasoning result based on the registered push service delivery address in step S510.

FIG. 15 is a diagram illustrating an association relationship among components according to a USN community creation and management process in a sensor network information providing method according to an embodiment of the present invention; FIG.

When a query requesting a sensing value is received from the service apparatus 2, the query analyzing unit 11 of the sensor network information providing apparatus 1 analyzes the query and generates USN community results as shown in FIG. 15, If it is determined to be necessary, the USN community management unit 14 is requested to create a USN community. In response to the request, the USN community management unit 14 inquires the information stored in the RDF storage unit 19 to create an appropriate USN community.

 When the USN community is created, the query analyzer 11 may perform a query to request a sensed value from the generated USN community, and the query may proceed in the same manner as described above. Non-real-time sensing value query query as described above for the newly created USN community. Unidirectional sensing value report, real time sensing value inquiry query, and the like can be performed.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (17)

A method of providing sensor network information from a device connected to the sensor network middleware
Receiving sensing information including sensing values obtained by sensor resources from sensor network middleware;
Converting the sensing information into a resource description framework (RDF) format and storing the converted sensing information in an RDF storage unit;
Analyzing a query provided by the application service;
Retrieving information corresponding to the query from the information stored in the RDF storage unit based on the analysis result and providing the retrieved information to the application service; And
And generating a new sensor community based on the information stored in the RDF storage unit if it is determined that sensor community creation is required based on the analysis result
And an information providing method. The method of claim 1, wherein
Performing inference based on the RDF type sensing information stored in the RDF storage unit and storing semantic information according to the inference result in the RDF storage unit. The method according to claim 2, wherein
Wherein the step of providing to the application service is a query execution result based on RDF type information stored in the storage unit when the query is a semantic information query query, the query execution result includes sensor resource metadata, sensing value, Wherein the semantic information includes at least one of semantic information. The method of claim 1, wherein
Storing sensing information received from the sensor network middleware in a sensing information storage unit; And
Providing the sensing information stored in the sensing information storage unit to the application service when the query is a non-real-time sensing value inquiry query based on the analysis result,
Further comprising: 5. The method of claim 4,
Wherein the providing of the sensing information stored in the sensing information storage unit to the application service comprises:
Providing the sensing information directly to a service when the non-real-time sensing value inquiry query is a one-time sensing information query; And
Providing the sensing information to the application service based on the previously stored push service delivery address when the non-real-time sensing value inquiry query is the event-sensing information inquiry or the periodic sensing information inquiry;
And an information providing method. The method according to claim 1,
Generating a middleware query corresponding to the query and transmitting the query to the sensor network middleware if the query is a real-time sensing value inquiry query based on the analysis result;
Acquiring sensing information including a sensing value corresponding to the middleware query from the sensor network middleware; And
Providing the obtained sensing information to the application service
Further comprising: delete 7. The method according to any one of claims 1 to 6,
Receiving an identifier allocation request for a sensor resource from the sensor network middleware;
Assigning an ID and a URL (uniform resource locator) as an identifier to the sensor resource and transmitting the allocated information to the sensor network middleware;
Receiving middleware connection information and operation state information on sensor resources from the sensor network middleware; And
Converting the allocated information, the connection information, and the operation status information into RDF data and storing and managing the data in the RDF storage unit
Further comprising: In a device that is connected to a sensor network middleware and provides sensor network information,
A middleware interface processor for performing an interface with the sensor network middleware;
A middleware query processing unit receiving sensing information including sensing values obtained from sensor resources from the sensor network middleware through the middleware interface processing unit;
An RDF converter for converting the sensing information into a resource description framework (RDF) format;
An RDF storage unit for storing RDF information including the RDF type sensing information;
A query analyzer for analyzing a query provided from an application service;
A query processor for searching for information corresponding to the query from the information stored in the RDF storage unit based on the analysis result and providing the retrieved information to the application service;
(ID) and a URL (uniform resource locator) according to a request for allocating an identifier for a sensor resource from the sensor network middleware, converts the allocated information into an RDF form through the RDF transform unit, and stores Management; And
Receiving a middleware connection information and operation state information on the sensor resource from the sensor network middleware, converting the information into an RDF form through the RDF conversion unit, and storing and managing the RDF form in the RDF storage unit,
And an information providing device. The method of claim 9, wherein
And a sensing information storage unit for storing the sensing information received from the sensor network middleware without RDF conversion. The method of claim 10, wherein
The query analysis unit
A first query generator for generating a SPARQL (SPARQL Protocol and RDF Query Language) query for the query if the query is a semantic information inquiry query and transmitting the query to the query processor;
A second query generator for generating a query corresponding to the type of the sensing information storage unit and transmitting the generated query to the sensing information storage unit when the query is a non-real-time sensing value inquiry query;
A third query generator for generating a middleware query corresponding to the sensor network middleware if the query is a real time sensing value inquiry query; And
If the query is a community-related query, if it is determined that a continuous sensing value inquiry for a specific set of sensors is required based on the analysis result, a fourth query generator
And an information providing device. 12. The method of claim 11,
And transmits the middleware query to the corresponding sensor network middleware through the middleware interface processing unit. The sensor network middleware receives the response value of the sensor network middleware for the middleware query and provides it to the query analyzing unit, And a middleware query processing unit for providing the middleware query to the information processing apparatus. 12. The method of claim 11,
And a community management unit for generating a new sensor community based on the information stored in the RDF storage unit if it is determined that the sensor community creation is required based on the analysis result. 12. The method of claim 11,
Wherein the query analyzing unit includes a query execution result based on the RDF type information stored in the RDF storage unit for the semantic information query query, the query execution result includes sensor resource metadata, a sensing value, and inferred semantic information And provides the application service as the application service. 10. The method of claim 9,
Further comprising a semantic reasoning unit for performing inference based on the RDF type sensing information stored in the RDF storage unit and storing the semantic information according to the inference result in the RDF storage unit. The method of claim 11, wherein
Further comprising a push service unit for providing the sensing information to an application service based on a previously stored push service delivery address when the non-real time sensing value inquiry query is an event sex sensing information inquiry or periodic sensing information inquiry.

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