KR101055552B1 - Data integration sensor network middleware system of heterogeneous sensor network - Google Patents

Abstract

Disclosed is a sensor network middleware system that integrates and manages sensor data of a heterogeneous sensor network to provide data specialized for a request of a user application. Composed of at least one sensing server for collecting sensor data in at least one sensor network consisting of at least one sensor and the main server receiving the sensor data collected from the sensing server to provide integrated data management and services, The server converts the collected sensor data into XML data and transmits it to the main server, and the main server configures the sensor network integrated middleware system to provide processed data by integrating XML data in response to a request of at least one user application. . Therefore, in the case of using the sensor network middleware system according to the present invention, it is possible to facilitate the development of sensor network applications and to be able to interwork with various conventional sensor networks.

Sensor, Sensor Network, Ubiquitous, XML, Middleware

Description

Data integration sensor network middleware system of heterogeneous sensor network {SENSOR NETWORKS MIDDLEWARE SYSTEM FOR INTEGRATING HETEROGENEOUS SENSOR NETWORK DATA}

The present invention relates to a middleware system of a sensor network, and more particularly, to a heterogeneous sensor network composed of various types of sensors, a data integration sensor network that enables integration of heterogeneous sensor networks providing sensor data in various formats. A middleware system.

The sensor network is a system that arranges a plurality of sensor nodes in a specific area to obtain environmental values and forms and transmits a network by itself. Sensor network is a core technology of ubiquitous computing, and it is a basic technology that is essential for situational computing technology aimed at providing variable services by recognizing changes in the environment surrounding users. .

Sensor networks can be configured in various ways because they are different in different regions and different sensing types. Especially, in case of existing sensor networks, data transmitted from sensors are not processed in a standardized format. There is a problem that the application program is difficult to handle and difficult to properly handle the various requirements of each user.

Therefore, it is necessary to develop middleware that supports communication between the sensor networks and the user application, and in particular, it is necessary to convert various raw data obtained from the sensor node to the user application.

In traditional systems, middleware refers to a layer of software that exists between an operating system and an application. On the other hand, middleware in the sensor network must consider characteristics of the sensor network in addition to the traditional meaning of providing an interface to a user or a higher level application in an application area rather than at the kernel level.

For example, the following requirements may be listed as the requirements of the middleware to be applied to the sensor network.

First, a unified data model must be established to enable the use of various sensor data. Although some studies have considered specific EPC compatible sensor data in the related art, there is a problem of generating each table according to the sensor format. In addition, SensorML, published as a standardized message structure for sensor data, includes the input / output interfaces and data algorithms of sensors that are not necessary for actual application services. Therefore, the structure and weight of the message structure for interoperability when exchanging sensor data have been required. .

Second, you need a high-level language that your application can use. For example, by providing a high-level language (such as SQL) that can express the requirements of an application, it must support a way to detect or handle complex events.

Third, it must be able to provide data that is dependent and meaningful to a specific application. Since the sensing data required by each application may be data collected from one or more sensor networks, it is necessary to integrate, manage, and extract such data to provide application-dependent data required by each application.

An object of the present invention for solving the above problems, heterogeneous sensor network integration middleware to enable heterogeneous sensor network integration, and to separate development and operation of sensor network user application from the configuration of the underlying sensor network. To provide a system.

In order to achieve the above object, the present invention provides an integrated data management system by receiving at least one sensing server collecting sensor data from at least one sensor network including at least one sensor, and sensor data collected from the sensing server. Comprising a main server providing a service, the sensing server converts the collected sensor data into XML data and transmits it to the main server, the main server integrates the XML data in response to a request of at least one user application Provided is a sensor network integrated middleware system characterized by providing processed data.

Herein, the sensing server may receive a sensor data collection request for a sensor network from a device connection layer and a higher layer, which directly transmit / receive data with the at least one sensor network, and abstract the device connection layer. Converts the received sensor data collection request into a communication protocol corresponding to a sensor network connected to a device connection layer and transmits the received sensor data collection request to the device connection layer, and transmits the sensor data received from the device connection layer in response to the sensor data collection request A data update layer which is converted and provided to a higher layer, and stores sensor data received through the data update layer, retrieves sensor data stored at the request of a higher layer, or through the data update layer. Collecting sensor data from a sensor network, converting a data storage layer provided to a higher layer and a sensor data request transmitted from a main server in a predetermined XML format to the data storage layer, and providing the data data to the data storage layer. It may be configured to include a data processing layer for converting the sensor data in a predetermined XML format and forwarded to the main server.

In this case, the data storage layer may include a class classifier classifying a request from the data processing layer, a real-time queue storing sensor data collected from the data update layer in real time, and sensor data collected from the data update layer. And a database storing the data, wherein the data loaded in the real-time queue is sequentially stored in the database. When the class classification unit requests sensor data in real time, the class classification unit requests the sensor data in real time. The sensor data stored in the real-time queue is directly transmitted to the data processing layer, and when the request from the data processing layer is a search request for the database, the request is converted into a SQL language and the database is queried. Question A can be configured to transmit to the data processing layers.

Here, the main server converts the sensor data request for the sensing server into a predetermined XML format and transmits the sensor data to the sensing server, and converts the sensor data received in the predetermined XML format from the sensing server to a higher layer. Sensors received from the sensing server through the data aggregation layer and the data aggregation layer, which are transmitted to the data aggregation layer, and the sensor data retrieved or classified by searching or classifying the stored sensor data according to a data pattern or sensing condition requested by a higher layer. A service storage request for providing data to a higher layer and a service query request delivered in a predetermined XML format from at least one user application are converted and transmitted to the data storage layer, and the sensor data provided from the data storage layer is predetermined. It may be configured to include a data service layer that is converted to the XML format and delivered to the at least one user application.

In this case, the service query request received by the data service layer from at least one user application is configured to include an event requested by the user application, and the data service layer analyzes the service query request to extract the event to extract the data. The event may be configured to include a data pattern or a sensing condition that the sensor data must satisfy.

The data storage layer may include an event storage for storing events for classifying sensor data according to data patterns or sensing conditions, data and sensors for storing sensor data collected through the sensing server and information of at least one sensor network. An event analyzer for generating a new event based on a data pattern or sensing condition of the sensor data collected from the data aggregation layer, a network analyzer, and storing the event in the event repository and an event transmitted from the data service layer in the event repository. Searching for and transmitting sensor data and sensor network information corresponding to a data pattern or sensing condition included in the searched event from the data and sensor network information storage to the data service layer. It can be configured to include a vent filter.

In the case of using the sensor network middleware system according to the present invention as described above, it is possible to provide an integrated data service to a server through communication with heterogeneous sensor networks.

In other words, each sensor network can be configured to manage data by adding a sensor network and a sensing server for unified data transmission and management, and integrate and manage various types of data through communication with the sensing server by adding a main server. Make sure In particular, an application developer can independently develop a user application regardless of the sensor network by using a unified data format according to a predefined XML schema in using the resources of the sensor network. That is, the application developer can develop an application by considering only data transmission with a main server according to a user's request rather than a sensor network system by developing using an API provided by middleware.

Therefore, in the case of using the sensor network middleware system according to the present invention, it is possible to facilitate the development of sensor network applications and to interoperate with various conventional sensor networks even if the existing sensor networks are not modified. do.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram illustrating a sensor network environment to which a sensor network data integration middleware system and an integrated middleware system according to the present invention are applied.

Referring to FIG. 1, the sensor networks 130-1, 130-2, and 130-3 may each include at least one sensor node 131 of various types, and the integrated middleware system according to the present invention. 100 may include at least one sensing server 120-1, 120-2, 120-3, which integrates and manages sensor networks composed of various sensor nodes, and a main server 110 that integrates and manages sensing servers. It can be configured to include.

In this case, the sensor nodes constituting the respective sensor networks 130-1, 130-2, and 130-3 may include various types of sensors having different output and input formats, and according to the present invention. The integrated middleware system 100 may be applied to a heterogeneous sensor network in which such various types of sensor nodes are mixed.

The sensor networks are configured to correspond to at least one sensing server. For example, the sensor network 130-1 corresponds to the sensing server 120-1, and the sensor network 130-2 corresponds to the sensing server 120-2. Although FIG. 1 illustrates that one sensing network corresponds to one sensing server, two or more sensing networks may correspond to one sensing server, and one sensing network may correspond to two or more sensing servers. Can be.

In more detail, the sensor network integrated middleware system 100 according to the present invention includes at least one sensing server for collecting sensor data in at least one sensor network including at least one sensor, and sensor data collected from the sensing servers. It consists of a main server that receives and provides integrated data management and service. The sensing server converts the collected sensor data into XML data and transmits it to the main server, and the main server includes at least one user application 10, 11, 12 In response to the request of c), the XML data is integrated to provide processed data.

In this case, the XML format of the sensor data transmitted and received between the main server and the sensing server takes a unified data format irrespective of the type and data format of the sensor network and the sensor nodes belonging to the sensor network. It can be configured to perform the function of data integration for heterogeneous sensor networks.

In addition, communication between the sensing servers 120-1, 120-2, and 120-3 and the main server 110 and between the main server 110 and the user applications 10, 11, 12 are TCP / Typical methods. It may be performed using an IP protocol or the like.

Hereinafter, the detailed configuration of the sensing server and the main server constituting the sensor network integrated middleware system according to the present invention will be described in detail.

2 is a block diagram illustrating a configuration of a sensing server of an integrated middleware system according to the present invention.

Referring to FIG. 2, the sensing server 120 of the integrated middleware system according to the present invention may include a device connect layer 121, a data update layer 122, and a data storage layer; 123 and a data processing layer 124 may be formed in a sequential hierarchical structure. For example, the device connection layer 121 forms the lowest layer that is responsible for the direct sensor data transmission and reception with the sensor nodes constituting the sensor network, and the data processing layer 124 is converted into an XML format with the main server 110. It forms the highest layer responsible for data transmission and reception.

However, the names of the layers constituting the sensing server illustrated in FIG. 2 mean a simplified name that can represent the function of each layer, and the names of the layers are not intended to limit the function of each layer. It should be noted that the functions of two or more layers are not combined to exclude one layer.

First, the device connection layer 121 collects sensor data by directly transmitting and receiving with at least one sensor network. That is, the device connection layer collects sensor data in the form of raw data from the sensor network through an interface connected with the sensor network. In this case, various protocols specialized for the interface method of the sensor network, such as the TCP / IP protocol, may be used for data transmission and reception between the device connection layer and the sensor network. Accordingly, the device connection layer may be configured such that a plurality of device connection layers exist according to the type of the underlying sensor network in order to perform a data integration role of the sensor network middleware system according to the present invention.

Next, the data update layer 122 is a higher layer of the device connection layer 121 and receives a sensor data collection request for a sensor network from a data storage layer 123 that is a higher layer of the data update layer 122. Converts the received sensor data collection request into a communication protocol corresponding to a sensor network connected to the device connection layer 121, transfers the received sensor data collection request to the device connection layer 121, and transmits sensor data received from the device connection layer; It converts in response to the sensor data collection request and provides the data storage layer as a higher layer.

Accordingly, the data update layer may include a message converter 122-1 for converting a sensor data collection request in the form of a message transmitted from a higher layer into a specialized communication protocol of a device connection layer. .

That is, the data update layer 122 abstracts the device connection layer 121, which is specialized in the interface method of the sensor network, from the data storage layer, so as to request a sensor data collection request from a higher layer to the device connection layer. It converts to and delivers. In addition, the data update layer 122 also plays a role of converting sensor data received from the device connection layer 121 into sensor data in a message form and transferring the sensor data to the data storage layer.

Next, the data storage layer 123 stores the sensor data received through the data update layer 122, retrieves the stored sensor data at the request of the data processing layer 124, which is a higher layer, or the data update layer ( It collects the sensor data from the sensor network through the 122, and serves to provide to the data processing layer 124, which is a higher layer.

To this end, the data storage layer again includes a real-time queue 123-1 for storing sensor data collected from the data update layer in real time, and a class classifier for classifying requests from the data processing layer. division (123-2), a database (123) for storing sensor data collected from the data update layer, and an SQL converter (123-4) for converting a request from the data processing layer into an SQL language. It can be configured in detail.

The data storage layer 123 first stores data transmitted from the data update layer 122 in the real-time queue 123-1 sequentially, and also stores the data update layer in the database 123-3 via the real-time queue. The data transferred from 122 is configured to be stored continuously.

In this case, the sensor data request from the data processing layer for the data storage layer may be instantaneous or may be a query request for previously stored sensor data.

Accordingly, the class classification unit 123-2 determines whether the request from the data processing layer 124 is a request for sensor data in real time, and a case of searching or inquiring for sensor data loaded in a database. Do this.

In this case, when the request from the data processing layer is to request sensor data in real time, the sensor data stored in the real-time queue 123-1 is directly transmitted to the data processing layer, and the request from the data processing layer is provided. In the case of a search or inquiry request for sensor data loaded in the database, the data from the data processing layer is converted into SQL (Structured Query Language) language to be queried in the database, and the data is transmitted to the data processing layer. The storage layer 123 may be configured.

On the other hand, the database 123-3 is a natural database that supports a standardized SQL language irrespective of a database format such as a relational database or an object-oriented database.

Finally, the data processing layer 124 converts the sensor data request transmitted from the main server in an XML format composed of a predetermined schema, and transmits the sensor data request to the data storage layer 123, and the sensor data provided from the data storage layer. It converts to an XML format composed of a predetermined schema and delivers to the main server.

That is, the data processing layer 124 is a top layer of the sensing server and performs a role of performing transmission and reception between the sensing server and the main server in a unified data model in XML format. For example, by taking a unified data model in XML format, the sensing server and main server can maintain data compatibility with each other, even if they are developed by different vendors.

3 is a block diagram illustrating a configuration of a main server of a middleware system according to the present invention.

Referring to FIG. 3, the main server 110 of the middleware system according to the present invention may include a data aggregate layer 111, a data storage layer 112, and a data service layer 113. ) May be configured in a sequential hierarchical structure. For example, the data aggregation layer 111 forms a lower layer in charge of transmission and reception with the sensing servers, and the data service layer 113 forms an upper layer in communication with user applications.

However, the names of the layers constituting the main server illustrated in FIG. 3 are defined as simplified names that can represent the functions of each layer, similarly to the names of the layers constituting the sensing server illustrated in FIG. 2. It should be noted that the names of the layers are not intended to limit the function of each layer, and that the functions of two or more layers are not combined to form a single layer.

First, the data aggregation layer 111 converts a sensor data request for at least one sensing server into a predetermined XML format and transmits the sensor data to the sensing server, and converts sensor data received from the sensing server in a predetermined XML format to a higher layer. The layer serves to deliver to the in-data storage layer 112.

Next, the data storage layer 112 stores the sensor data received from the sensing server through the data aggregation layer, and the sensor data stored according to the data pattern or sensing condition requested by the data service layer 113, which is a higher layer. Is a layer that provides the data service layer 113 as the upper layer by searching or classifying the sensor data.

More specifically, the data storage layer 112 may include an event repository 112-1, a data and sensor network information repository 112-2, and an event analyzer 112-3. And an event filter 112-4.

First, the event store 112-1 corresponds to a component that stores an event for classifying sensor data according to a data pattern or a sensing condition.

Meanwhile, an event in the data storage layer according to the present invention is information including a data pattern or a sensing condition that the sensor data must satisfy, and means a criterion for providing a classification condition of the sensor data. In other words, the event refers to information that each user application delivers to the middleware system according to the present invention in order to request sensor data specialized to the user.

For example, the user application does not need to directly collect and analyze all sensor data of all sensor networks in order to receive the sensor data required by the user, and the data pattern and sensing conditions of the sensor data required by the user are called events. Will be forwarded to the main server.

Next, the data and sensor network information storage 112-2 is a component that stores sensor data collected through the sensing server and information of at least one sensor network. That is, the data and sensor network information storage 112-2 stores detailed information on at least one sensor network corresponding to sensing servers connected to the main server, and stores sensor data collected from each sensor network. Element.

The event analyzer 112-3 is a component that generates a new event and stores it in the event store based on a data pattern or a sensing condition of the sensor data collected from the data aggregation layer 111. That is, the event analyzer continuously analyzes sensor data collected through the data aggregation layer, extracts specific data patterns or sensing conditions of the sensor data, and generates a newly extracted specific data pattern or sensing condition as an event. To be stored in the event store 112-1.

Finally, the event filter 112-4 searches for the request event delivered from the data service layer 113 in the event store 112-1, and sensor data corresponding to a data pattern or sensing condition included in the retrieved event. And sensor network information retrieved from the data and sensor network information storage 112-2 and forwarded back to the data service layer 113.

Finally, the data service layer 113, which is the highest layer constituting the main server, converts a service query request delivered in a predetermined XML format from at least one user application to a data storage layer, and stores the data. The layer converts the sensor data provided from the layer into a predetermined XML format and delivers the same to the at least one user application.

In this case, the service query request received by the data service layer from at least one user application is configured to include an event requested by the user application, and the data service layer analyzes the service query request to extract the event to extract the data. It can be configured to deliver to the storage layer.

For example, in order to obtain application-dependent sensor data specific to each user application from the middleware system according to the present invention, the user application sends information, such as an event including a data pattern or a sensing condition of the sensor data, to the service query request. Include it and make a request to the data service layer of the main server.

In other words, each user application does not need to obtain and classify or retrieve all sensor data from all sensor networks, and simply delivers a service query request including an event to the main server. The sensor data corresponding to can be extracted from various sensor networks and provided to user application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

1 is a conceptual diagram illustrating a sensor network environment to which a sensor network data integration middleware system according to the present invention and an integrated middleware system according to the present invention are applied.

2 is a block diagram illustrating a configuration of a sensing server of an integrated middleware system according to the present invention.

3 is a block diagram illustrating a configuration of a main server of a middleware system according to the present invention.

<Description of Major Symbols Used in Drawings>

100: sensor network middleware system

110: main server 120: sensing server

111: data aggregation layer 112: data storage layer

113: data service layer

121: device connection layer 122: data update layer

123: data storage layer 124: data processing layer

Claims (6)

At least one sensing server collecting sensor data from at least one sensor network including at least one sensor, and a main server receiving sensor data collected from the sensing server and providing integrated data management and service; The sensing server converts the collected sensor data into XML data and transmits it to the main server, wherein the main server provides the processed data by integrating the XML data in response to a request of at least one user application. Sensor network integrated middleware system, The sensing server, A device connection layer configured to collect sensor data by directly transmitting and receiving with the at least one sensor network; Receiving a sensor data collection request for a sensor network from an upper layer, abstracting the device connection layer, converting the received sensor data collection request into a communication protocol corresponding to a sensor network connected to the device connection layer, and connecting the device; A data update layer which transfers the sensor data received from the device connection layer to the upper layer by converting sensor data received from the device connection layer in response to the sensor data collection request; A data storage layer that stores sensor data received through the data update layer, retrieves sensor data stored at a request of a higher layer, or collects sensor data from a sensor network through the data update layer and provides the upper layer to the upper layer. ; And The data processing layer converts the sensor data request transmitted from the main server in a predetermined XML format to the data storage layer, and converts the sensor data provided from the data storage layer into a predetermined XML format and delivers the data to the main server. It is configured to include, The data storage layer may include a class classifier classifying a request from the data processing layer, a real-time queue storing sensor data collected from the data update layer in real time, and storing sensor data collected from the data update layer. And a SQL conversion unit for converting a request from a database and the data processing layer into an SQL language, wherein the data loaded in the real-time queue is sequentially stored in a database, and the class classification unit is provided from the data processing layer. When the request is for requesting sensor data in real time, when the sensor data stored in the real-time queue is directly transmitted to the data processing layer, and the request from the data processing layer is a search request for the database. Prize Sensor network integrated middleware system for converting a request from the SQL conversion unit to the SQL language to query the database to transmit the query result to the data processing layer. delete delete The method of claim 1, The main server, A data aggregation layer that converts a sensor data request for the sensing server into a predetermined XML format and transmits the sensor data to the sensing server, and converts sensor data received from the sensing server in a predetermined XML format to a higher layer; Storing sensor data received from the sensing server through the data aggregation layer, searching or classifying stored sensor data according to a data pattern or sensing condition requested by a higher layer, and providing the retrieved or classified sensor data to a higher layer. A data storage layer; And Converts a service query request transmitted from at least one user application in a predetermined XML format to the data storage layer and converts sensor data provided from the data storage layer into a predetermined XML format to the at least one user application. Sensor network integrated middleware system comprising a data service layer to deliver. The method of claim 4, wherein The service query request received by the data service layer from at least one user application is configured to include an event requested by the user application, and the data service layer analyzes the service query request to extract the event to extract the data storage layer. To, And the event includes a data pattern or a sensing condition that the sensor data must satisfy. The method of claim 5, The data storage layer is An event store storing an event for classifying sensor data according to a data pattern or a sensing condition; A data and sensor network information storage configured to store sensor data collected through the sensing server and information of at least one sensor network; An event analyzer for generating a new event and storing it in the event store based on a data pattern or a sensing condition of the sensor data collected from the data aggregation layer; And Search for the event delivered from the data service layer in the event store, and search the sensor data and sensor network information corresponding to the data pattern or sensing condition included in the searched event in the data and sensor network information store to search the data service layer. Sensor network integrated middleware system comprising an event filter to transmit to.

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