JP2007122433A - Sensor data allocation distribution system and method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sensor data allocation distribution system capable of acquiring detection data desired by a client and avoiding concentration of processing to a specific sensor data allocation device. <P>SOLUTION: A sensor network management device 5, to which a plurality of sensor nodes 6 managed individually by different management entities are connected, for sensor networks 3a and 3b collects detection data from the sensor nodes 6 and transmits the detection data to sensor data allocation devices 2a and 2b. The sensor data allocation devices 2a and 2b receive the detection data transmitted from the sensor network management device 5 and duplicate the detection data complying with requests from client terminal devices 4a and 4b to transmit them to proper client terminal devices. The client terminal devices 4a and 4b transmit requests for desired detection data to the sensor data allocation devices and receive supply of the requested detection data from the sensor data allocation devices. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention combines sensor networks of different management entities, receives detection data transmitted by the sensors, and sends a plurality of external clients having different request conditions to the sensor type, position range, and value range requested by the client. It is related with the sensor data distribution delivery system which provides the detection data of.

  In recent years, many various and various sensors have been installed according to purposes such as greenhouse temperature management, weather information collection, environmental pollution monitoring, and fire monitoring. These sensors usually constitute individual sensor data distribution systems with different management entities for each installation purpose, and we have the intended purpose based on information from each sensor data distribution system. Can be achieved.

  For example, the Japan Meteorological Agency collects information from sensors such as temperature and humidity installed in about 1,300 locations nationwide and uses them for weather forecasts and the like. In addition, the temperature management system for cultivating good-quality vegetables in the greenhouse collects temperature and humidity information from the temperature and humidity meter installed in the greenhouse. This is used to issue an alarm to the client (information requester) when the temperature is measured. In a system using these sensors, it is desirable that as much information as possible can be acquired using various information sources as much as possible according to the usage.

  However, when an application of such a system performs sensor monitoring processing, the application manages a sensor network management system that manages sensor attributes and positions and manages information from sensors connected to the sensor network. By directly specifying the sensor ID, the data from each sensor was acquired. In other words, in order to obtain the desired sensor data, the client needs to know what sensor is connected and know the ID of the corresponding sensor in advance. However, if individual sensor data distribution and distribution systems are integrated by different management entities and a sensor data distribution and distribution system that can be used for purposes other than the installation purpose is assumed, each client must It is difficult to individually specify a sensor ID that provides target data by managing desired sensor attributes and positions.

On the other hand, for example, according to the invention of Patent Document 1, a method is adopted in which information is distributed and stored in a plurality of information terminals such as a network management device, an agent, and a server on the sensor data distribution and delivery system. Thus, the client application realizes a mechanism that can acquire detection results corresponding to various search requests without individually managing the attributes and IDs of the sensors connected to the sensor data distribution system.
JP 2003-122796 A

  However, in the case of the system according to the above-described patent document 1, the client application does not need to individually manage the sensor attributes and IDs. However, the agent uses a unified sensor ID on the sensor data distribution and distribution system. Management and attribute management.

  In addition, in the case of the system according to the above-described patent document 1, the amount of access to the network management device or the like in which the detection data is accumulated cannot be determined in advance. For example, the detection data of the same sensor from many client applications When requested or when a large number of search requests are issued in a short time, there is a possibility that the requests are concentrated on a specific network management device and become a bottleneck for communication. Therefore, in order to avoid this, it is necessary to allocate resources that can withstand sufficient access to individual network management devices, which is considered to be a heavy burden on individual management entities. Further, in this case, there is a problem that the search processing overhead increases due to an increase in accumulated detection data.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a sensor data distribution / distribution system in which sensor networks of different management entities are combined. Even if you do not have knowledge of whether or not it is included, it is possible to obtain the purpose information, and to make effective use of it by using detection data for information acquisition requests of various clients The present invention is to provide a sensor data distribution system and method that can be used.

  In addition, there is no increase in the burden on individual management entities due to the overall size of the sensor data distribution and distribution system and the amount of requests from individual clients. Further, in the agent system, search processing due to an increase in the amount of stored data. It is possible to avoid the concentration of processing on a specific data distribution device even when detection data of the same sensor type and position condition is requested from a large number of clients. It is providing the sensor data distribution delivery system and method which become.

  In order to achieve the above object, the present invention combines a sensor network to which a plurality of sensor nodes individually managed by different management entities are connected, collects detection data from the sensor nodes, and combines a plurality of different requirements. In a sensor data distribution and distribution system that provides detection data requested by each client, a sensor network management device having a function of collecting detection data from the sensor nodes and the plurality of clients are installed. A plurality of client terminal devices having functions of transmitting detection data desired by the client and receiving distribution of the detection data, and receiving the detection data transmitted from the sensor network management device, and the client terminal device The detection data according to the request from Characterized by comprising a sensor data distribution apparatus has a function of transmitting and duplicated for Ianto terminal device.

  The sensor network management device performs sensor data distribution according to an unnecessary ID table in which sensor IDs that need not be transmitted to the sensor data distribution device are registered and an unnecessary ID registration request transmitted from the sensor data distribution device. No need to register unnecessary ID data in the unnecessary ID table in accordance with an unnecessary ID data clear request transmitted from the sensor data sorting device, or register a sensor ID that does not need to be transmitted to the distribution device in the unnecessary ID table When the sensor ID in the detection data sent from the ID registration unit and the sensor node is not a sensor ID registered in the unnecessary ID table, the detection data is sent to the sensor data sorting device and sent from the sensor node. If the sensor ID in the detection data is registered in the unnecessary ID table, the detection data It is preferred to include a unnecessary data filter unit discards.

  In addition, the client terminal device includes a sensor type that is a combination of a detection content indicating a sensor type and a detection unit that indicates a unit of a measurement value output by the sensor that measures the detection data, and a sensor that measures the detection data. Of the location where the client wants to collect data, the geographical range that the client wants to collect data from, the center condition as a combination of the center position and its radius, and the measurement value output by the sensor. An input processing unit that performs input processing when a user inputs a detection data value condition representing a range of necessary values or a combination of these, and a request signal based on the request condition sent from the input processing unit It is preferable that a request signal generation unit that performs processing for generating the request signal and transmitting the request signal to the sensor data sorting device is provided.

  Further, the sensor data distribution device registers the request condition in the request condition table in association with a request source address, a request condition table for storing the request condition sent from the client terminal device, and at the same time, the sensor network management A request condition management unit that transmits a request for clearing unnecessary ID data to the device, a detection data temporary storage table that temporarily stores detection data sent from the sensor network management device, and detection data that matches the request condition The detection data is temporarily extracted from the matching data temporary storage table and the detection data temporary storage table, and each condition of the request condition table is matched. The request source address of the request condition is the same as the number matching the condition. The detection data is replicated in association with If there is detection data that does not match any of the required conditions, it is discarded, and the condition matching section that notifies the source address and sensor ID of the detection data, and the unnecessary notification notified by the condition matching section Data is extracted from the unnecessary ID notification unit that transmits the sensor ID to the sensor network management device of the transmission source address of the abandoned detection data, and the matching data temporary storage table, and the detection data is distributed to the request source address It is preferable to provide an output data processing unit for processing.

  The present invention also provides a sensor network including a sensor network management device to which a plurality of sensor nodes individually managed by different management entities are connected, a client terminal device installed corresponding to the client, and sensor data distribution In the sensor data distribution method of a sensor network system comprising a device, the client terminal device transmits a request condition for detection data desired by a client to the sensor data distribution device, and the sensor network management device transmits the sensor data. The detection data collected from the sensor node is transmitted to the distribution device, and the content of the detection data transmitted from the sensor network management device and the client terminal device are transmitted from the sensor data distribution device. Match the requirements, If the knowledge data matches the requirements, characterized in that to deliver detection data to the client terminal device.

  In the present invention, the sensor data distribution device performs matching between the content of the detection data sent from the sensor network management device and the request condition sent from the client terminal device, and the content of the detection data Is not matched with the request conditions of all the client terminal devices, the sensor ID that collected the detection data is transmitted to the sensor network management device that is the transmission source of the detection data that does not match the request conditions, In the transmitted sensor network management device, it is preferable to discard the information of the designated sensor ID.

  The request condition sent from the client terminal device includes a sensor type and detection data that are a combination of a detection content indicating a sensor type and a detection unit indicating a unit of a measurement value output by the sensor that measured the detection data. This is the location where the measured sensor is installed, the location specified by the combination of the center position, which is the center coordinate specified by the client, and its radius, or the range of measurement values output by the sensor that measured the detection data. The detection data value condition is preferable.

  The request condition sent from the client terminal device includes a sensor type that is a combination of a detection content indicating a sensor type and a detection unit that indicates a unit of a measurement value output by the sensor that has measured the detection data, and detection data. The location where the sensor that measured the sensor is installed, the position specified by the combination of the center position and the radius that is the center coordinate specified by the client, and the range of measurement values output by the sensor that measured the detection data It is preferable to be a combination of any two or more of the detected data value conditions.

  As described above, in the sensor data distribution and delivery system according to the present invention, the client makes a request for detection data, not the sensor node ID, but the sensor type, location, position condition, detection data value condition, or a combination thereof. Desired detection data can be acquired by designating by. That is, in the system of the present invention, even when the client does not have knowledge of what kind of sensor the sensor network includes, the target information can be obtained. As a result, the client can acquire a variety of information from sensor data widely distributed on the sensor data distribution and distribution system, and various sensor nodes connected to the sensor data distribution and distribution system can be obtained. It can be effectively used to acquire useful information.

  Further, in the sensor data distribution system according to the present invention, the sensor network management device only transmits data to the sensor data distribution device without accumulating the detected data, and replicates the request for the detection data. Also, since the distribution process is performed by the sensor data distribution device, there is no need to increase the burden on individual management entities due to the overall size of the sensor data distribution system and the increase in the amount of requests from individual clients. Sensor data can be provided.

  In the sensor data distribution and delivery system according to the present invention, detections collected from a sensor network managed by an individual management entity according to request conditions such as sensor type, location, position condition, and detection data value specified by a client. The data distribution destination is spontaneously determined and transmitted by the sensor data distribution device, and the network controller can change the transmission destination address of the detection data for each data. According to said structure, the delivery destination of the detected data is determined in real time, and the detection data transmission process is performed spontaneously. In addition, it is possible to distribute processing with respect to an increase in data amount. For this reason, it is not necessary to consider the overhead of search processing for an increase in accumulated data, and detection data can be provided to a client application. In addition, with the above configuration, even when detection data of the same sensor type and position condition is requested from a large number of clients, it is possible to avoid concentration of processing on a specific sensor data distribution device. Become.

  Further, in the sensor data distribution system according to the present invention, when a matching process of required conditions is performed in the sensor data distribution device, a sensor ID of detection data that does not match any of the required conditions is set as an unnecessary sensor ID. Since the detection data can be discarded by the network management device by transmitting the detection data to the network management device, the processing efficiency of the entire sensor data distribution system can be improved. Improvement can be expected.

  In addition, as a form of use of the system of the present invention, the information of the sensor managed by each individual management entity is collected using a dedicated line and the system of the present invention is only used for the purpose of disclosing the sensor information. It can also be used. In this case, among sensor nodes connected to the present system, unnecessary sensor IDs may be very large compared to the total number of installed devices. In that case, from the viewpoint of preventing unnecessary data from flowing on the network, the above functions can be expected to greatly contribute to the purpose.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an overall configuration of a sensor data distribution system according to an embodiment of the present invention. A sensor data distribution system 1 shown in FIG. 1 receives a plurality of sensor nodes 6 and information from the sensor nodes 6, and adds necessary information (such as a time stamp) to each data. The request conditions from the sensor networks 3a and 3b, the client terminal devices 4a and 4b, and the client terminal devices 4a and 4b including the device 5 are registered, and the information output from the sensor network management device 5 is received. Matching with the request conditions registered by the client terminal devices 4a and 4b is performed, and the sensor data distribution devices 2a and 2b are configured to transmit only necessary information to the client terminal devices 4a and 4b.

  The sensor networks 3a and 3b, the sensor data sorting devices 2a and 2b, and the client terminal devices 4a and 4b are capable of data communication via the communication network 7, respectively. In the embodiment shown in FIG. 1, it is assumed that the management entity of the client terminal device 4a manages the sensor network 3a, and the management entity of the client terminal device 4b manages the sensor network 3b.

  Here, the management entity has the right to determine the location of the sensor network management device 5 and sensor node 6 used in the sensor networks 3a and 3b, the numbering of individual IDs, and what kind of sensor to select, and maintenance. Is to do. For example, when the management entities are different in the sensor networks 3a and 3b, the ID assignment rule for identifying the sensor node 6 may be different. The management entities of the sensor networks 3a and 3b may or may not be separate because the sensor node 6 is used for individual purposes.

  In the following description, the sensor networks 3a and 3b are referred to as “sensor network 3” unless otherwise distinguished. Further, when the client terminal devices 4a and 4b are not particularly distinguished, they are described as “client terminal device 4”, and when the sensor data distribution devices 2a and 2b are not particularly distinguished, they are described as “sensor data distribution device 2”.

  The sensor network 3 includes one sensor network management device (sensor network gateway device) 5 and a plurality of sensor nodes 6 capable of data communication with the sensor network management device 5.

  These sensor nodes 6 are selected according to specific purposes, for example, temperature management in a greenhouse, weather forecast, and disaster prevention measures, and are installed at a place according to the purpose. In addition, the sensor network 3 is usually configured for each purpose. As the sensor network 3, for example, a unique LAN in a greenhouse, a unique network for slope monitoring, or the like can be considered. The sensor data distribution device 2 acquires the sensed information from each sensor network 3 and transmits the sensing data to the distribution destination client terminal device 4 according to the purpose (request) of each sensor network 3.

  Each of the sensor network management device 5 and the sensor node 6 includes a communication unit. The sensor network management device 5 is a parent device, and the sensor node 6 is a child device. Data communication is performed between the parent device and the child device based on a predetermined protocol.

  Data communication between the parent device and the child device may be wireless communication or wired communication. As the wireless communication, for example, wireless LAN (Local Area Network) standard, Bluetooth standard, weak radio waves, wireless power using specific power savings, near-field infrared communication, and the like can be considered. As wired communication, one using a LAN or one using a dedicated wiring can be considered.

  As a communication method between the parent device and the child device, there are bidirectional communication or unidirectional communication, which differs depending on the type of the sensor node 6. When the sensor node 6 is controlled by receiving a control signal or the like from the sensor network management device 5, the communication method is bidirectional communication. On the other hand, when the sensor node 6 unilaterally sends a signal to the sensor network management device 5, the communication method is unidirectional communication from the slave unit to the master unit.

  In the sensor node 6, the data communication at the interface between the detection unit that performs detection and the communication unit may be wireless communication or wired communication. As wireless communication, for example, wireless LAN standards, Bluetooth standards, weak radio waves, those using short-range wireless such as specific power saving, short-range infrared communication, and the like can be considered. As wired communication, one using a LAN or one using a dedicated wiring can be considered. Detection data representing a detection result by the detection unit is sent to the communication unit of the sensor node 6 via this interface, and further transmitted from the communication unit of the sensor node 6 to the communication unit of the sensor network management device 5. The sensor network management device 5 receives the detection data sent from the sensor node 6, performs processing to be described later, and sends information based on the detection data to the sensor data sorting device 2.

  In the following, it is assumed that digital data communication is performed between the sensor node 6 and the sensor network management device 5 unless otherwise specified.

  One sensor network management device 5 normally manages a plurality of sensor nodes 6, and the sensor network 3 is configured by these. In order to identify individual sensor nodes 6 in the sensor network 3, for example, a unique sensor ID may be assigned to each sensor node 6. As the sensor ID, for example, an IP address of TCP / IP can be used. It is also possible to use a unique ID at random according to the rules in the management entity. However, in the sensor network 3, it is only necessary that the sensor network management device 5 can recognize each sensor node 6, and the identification method may be other than the above.

  Next, data communication modes between the sensor data distribution device 2 and the sensor network management device 5 and between the sensor data distribution device 2 and the client terminal device 4 will be described. 2A to 2C are conceptual diagrams illustrating examples of data communication modes between the sensor data distribution device 2 and the sensor network management device 5 in the sensor data distribution system 1. FIG.

  Here, FIG. 2A shows a case where the Internet is used as the communication network 7. Note that the entire area between the sensor data distribution device 2 and the sensor network management device 5 may be the Internet. However, between the Internet and the sensor network management device 5, for example, a mobile data communication service adopting a packet communication method. It may be connected by wireless packet communication such as. Further, a public line such as a telephone line (ISDN: Integrated Service Digital Network), a PHS (Personal Handyphone System) line, or a Dopa network may be provided between the Internet and the sensor data distribution device 2.

  FIG. 2B shows a case where the Internet and a LAN connected to the Internet are used as the communication network 7. In FIG. 2B, a LAN is interposed between the Internet and the sensor network management device 5. As the LAN, for example, Ethernet (registered trademark) or a wireless LAN can be used. A LAN may be interposed between the Internet and the sensor data distribution device 2.

  FIG. 2C shows a case where a public line is used as the communication network 7. As the public line, a telephone line (including ISDN, PHS, mobile phone line, Dopa network, etc.) can be used. In the following description, the case where the Internet is used as the communication network 7, that is, the configuration of FIG.

  FIGS. 3A to 3C are conceptual diagrams illustrating examples of data communication modes between the sensor data distribution device 2 and the client terminal device 4 in the sensor data distribution system 1. FIG. Here, FIG. 3A shows a case where the Internet is used as the communication network 7. The whole between the sensor data distribution device 2 and the client terminal device 4 may be the Internet. However, between the Internet and the client terminal device 4, for example, a mobile data communication service using a packet communication method or the like You may connect by wireless packet communication. Further, a public line such as a telephone line (ISDN), a PHS line, or a Dopa network may be provided between the Internet and the sensor data distribution device 2.

  FIG. 3B shows a case where the Internet and a LAN connected to the Internet are used as the communication network 7. In FIG. 3B, a LAN is interposed between the Internet and the client terminal device 4. For example, an Ethernet or a wireless LAN can be used as the LAN. A LAN may be interposed between the Internet and the sensor data distribution device 2.

  FIG. 3C shows a case where a public line is used as the communication network 7. As the public line, a telephone line (including ISDN, PHS, mobile phone line, Dopa network, etc.) can be used. In the following description, unless otherwise specified, the case where the Internet is used as the communication network 7, that is, the configuration shown in FIG.

Next, each component of the system of FIG. 1 will be described in more detail.
(Client terminal device)
FIG. 4 is a block diagram showing an internal configuration of the client terminal device 4. The client terminal device 4 is for requesting detection data to the sensor data sorting device 2 and receiving information from the sensor data sorting device 2. As the client terminal device 4, a personal computer or the like can be considered.

  The client terminal device 4 includes a CPU 41 that performs various processes, a storage unit 42 that stores various data, a communication interface 43 that serves as an interface with the communication network 7, and an input unit 44 that receives input from the user.

  The storage unit 42 includes a data storage table 421 that stores detection data obtained via the communication interface 43. The CPU 41 instructs various data processing and various control circuits based on the calculation function. Thereby, the CPU 41 controls the client terminal device 4. The CPU 41 functions as each functional block of the input processing unit 411, the request signal generation unit 412, and the detection data acquisition unit 413.

  When there is an input from the input unit 44 by the user, the input processing unit 411 performs input processing and sends the input content to the request signal generation unit 412. The request signal generation unit 412 generates a request signal based on the content of the information request sent from the input processing unit 411 and sends the request signal to the sensor data distribution device via the communication interface 43 and the communication network 7. Process. The content of the information requested by the request signal includes, for example, a “sensor type” that is a combination of a detection content indicating a sensor type input by a user and a detection unit indicating a unit of a measurement value output by a sensor that measures detection data. `` Installation location '' indicating the installation status of the sensor that measured the detection data, and the geographical range that the client wants to collect data is expressed by the combination of the center position that is the central coordinate and its radius A “position condition”, a “detection data value condition” representing a range of necessary values among the measurement values output from the sensor, or a requirement condition including a combination thereof is included.

  When the detection data is sent via the communication network 7 and the communication interface 43, the detection data acquisition unit 413 stores the detection data in the data storage table 421 of the storage unit 42. The storage unit 42 stores various programs and data for performing various processes in the CPU 41. The input unit 44 is composed of, for example, a keyboard or a mouse in a personal computer.

(Sensor)
Various sensors are used as the sensor node 6 of the sensor network 3. One example is as follows. There are a vibration sensor, an acceleration sensor, and the like for detecting the movement of an object. There are temperature sensors, humidity sensors, CO ₂ sensors, pollen sensors, etc. that detect environmental conditions (meteorological information) In this way, the sensor node 6 of the sensor network 3 detects physical phenomena, generally called sensors. Then, a device that can convert the detection result into an electric signal and send it as detection data to the sensor network management device 5 is included.

  The sensor node 6 of the sensor network 3 may include an autonomous sensor. Here, the autonomous sensor refers to a sensor that periodically reports information about the sensor itself (sensor attribute information or the like) to the sensor network management device 5. The sensor attribute information is, for example, information on the type of sensor (including detectable contents and units), arrangement (position, installation location), and time (sensing time). A sensor data distribution device, which will be described later, reports detection data to an appropriate client terminal device based on the sensor attribute information.

  The sensor may be built in a movable object such as a mobile phone. In this case, when a person with a mobile phone moves, the arrangement of sensors changes, and the contents detected by the sensors also change. For example, in the case where a plurality of temperature sensors are provided to detect outdoor temperature distribution, when one sensor is built in a mobile phone and the mobile phone is moved, the temperature at any position outdoors Whether or not the temperature sensor detects it changes. When an autonomous sensor is used as a temperature sensor in such a case, it can always be recognized where the temperature is detected outdoors.

  Sensors can be roughly classified into three types, that is, a periodic type, an event type, and an inquiry type (polling type), for example, according to a detection result reporting method, that is, a detection data notification method to the sensor network management device 5.

  Here, the periodic sensor performs detection spontaneously in a predetermined time period and notifies detection data. An example of a periodic sensor is a temperature sensor that sends temperature data once every 10 minutes. The event type sensor notifies detection data when a predetermined phenomenon is detected. As an example of the event type sensor, a vibration sensor that notifies data when vibration is detected can be considered. The inquiry type sensor detects when there is a request for detection data from the sensor network management device 5 side, and notifies the detection data.

  In the following, the method of the detection result of the sensor node 6 will be described as a case of a periodic sensor. Anything can be used.

(Sensor network management device)
FIG. 5 is a block diagram showing an internal configuration of the sensor network management device 5. The sensor network management device 5 controls the individually managed sensor network 3 to collect detection data from the sensor node 6, converts the data into a format that can be understood by the sensor data distribution device, and the communication interface 53. And provided to the sensor data distribution device via the communication network 7.

  The sensor network management device 5 is, for example, a computer having a communication function (such as a personal computer or a large computer), a CPU 51 that performs various processes, a storage unit 52 that stores various data, and an interface with the communication network 7. A communication interface 53, a sensor interface 54 as an interface with the sensor node 6, and a clock 55 for generating time information. Although not shown, the sensor network management device 5 includes an input unit (keyboard / mouse, etc.) and a display unit (display, etc.) in order to input and update various information to the storage unit 52. Yes.

  The communication interface 53 functions as an interface with the communication network 7. The sensor network management device 5 can perform data communication with the sensor data distribution device via the communication interface 53, and the detection data is provided to the sensor data distribution device via the communication interface 53.

  The sensor interface 54 functions as an interface with the sensor node 6. The sensor network management device 5 can perform data communication with the sensor node 6 via the sensor interface 54, and can acquire detection data via the sensor interface 54. When the sensor node 6 is controlled by receiving a control signal or the like, a control signal is sent to the sensor node 6 via the sensor interface 54.

  The clock 55 generates time information indicating the current time and provides it to the CPU 51. The time information provided by the clock 55 may include date information.

  The CPU 51 instructs various data processing and various control circuits based on the calculation function. Thereby, the CPU 51 controls the entire sensor network management device 5 and the sensor node 6. In addition, the CPU 51 collects and processes the detection data from the sensor node 6 and provides the detection data to the sensor data distribution device, so that the temporary storage data extraction unit 511, the data input / output unit 512, the data input unit 513, the data It functions as functional blocks of a conversion unit 515, a detection data temporary storage unit 516, a sensor attribute reference unit 517, an unnecessary ID registration unit 518, and an unnecessary data filter unit 519. Each of these functional blocks is realized by the CPU 51 executing a predetermined program on the storage unit 52.

  Each functional block will be described below. The data input / output unit 512 outputs the detection data to the communication interface 53 in order to transmit the detection data sent from the data conversion unit 515 to the sensor data sorting device. Further, the data input / output unit 512 receives an unnecessary ID registration request or an unnecessary ID data clear request transmitted from the sensor data sorting device and sends it to the unnecessary ID registration unit 518 (unnecessary ID registration request and unnecessary ID data). Details of the clear request will be described later).

  The unnecessary ID registration unit 518 registers the sensor ID in the unnecessary ID table 523 in accordance with the unnecessary ID registration request sent from the data input / output unit 512. If the request sent from the data input / output unit 512 is an unnecessary ID data clear request, the unnecessary ID data in the unnecessary ID table 523 is cleared.

  The data input unit 513 inputs detection data transmitted from the sensor node 6 and received by the sensor interface 54 into the CPU 51. The detection data temporary storage unit 516 writes the input detection data in the detection data temporary storage table 522 of the storage unit 52.

  The detection data temporary storage table 522 is a table in which the detection data input by the data input unit 513 is associated with the sensor ID, sensor attribute information, and detection time information of the sensor node 6 that is the transmission source of the detection data. is there. The detection time information is time information acquired from the clock 55 when the detection data temporary storage unit 516 writes in the detection data temporary storage table 522. When detection time information is included in the detection data transmitted from the sensor node 6, the detection data temporary storage unit 516 extracts the time information from the detection data and detects the detection time in the detection data temporary storage table 522. Write as information. The sensor attribute information is sensor attribute information acquired from the attribute data table 521 through the sensor attribute reference unit 517 when the detection data temporary storage unit 516 writes the detection data temporary storage table 522. If the detection data transmitted from the sensor node 6 includes attribute information, the detection data temporary storage unit 516 extracts the corresponding information from the detection data and stores the attribute information in the detection data temporary storage table 522. Write as.

  An example of the data structure of the attribute data table is shown in FIG. FIG. 7 shows an example of the data structure of the detection data temporary storage table. Here, the transmission source address is an address of the sensor network management device.

  The data generated and stored by the above process may be different from the data as the detection result of the sensor node 6, but here the data generated by the above process is also referred to as detection data.

  The temporary storage data extraction unit 511 acquires a record stored in the detection data temporary storage table 522 using a FIFO (First In First Out), and sends the acquired data to the unnecessary data filter unit 519.

  If the sensor ID in the detection data sent from the temporary storage data extraction unit 511 is not a sensor ID registered in the unnecessary ID table 523, the unnecessary data filter unit 519 sends it to the data conversion unit 515. If the sensor ID in the detection data sent from the temporary storage data extraction unit 511 is registered in the unnecessary ID table 523, the detection data is discarded here. The data conversion unit 515 converts the detection data sent from the unnecessary data filter unit 519 into a format that can be understood by the sensor data sorting device, and sends it to the communication interface 53 for transmission to the sensor data sorting device.

(Sensor data distribution device)
FIG. 8 is a block diagram showing the internal configuration of the sensor data distribution device. The sensor data distribution device 2 receives information transmitted from the sensor network management device, and transmits detection data corresponding to a request from the client to an appropriate client terminal device.

  The sensor data distribution device 2 is, for example, a computer having a communication function (such as a personal computer or a large computer), and has a CPU 21 that performs various processes, a storage unit 22 that stores various data, and an interface with the communication network 7. A communication interface 23 is provided. Although not shown, the sensor data sorting device 2 has an input unit (such as a keyboard / mouse) and a display unit (such as a display) in order to input and update various information to the storage unit 22. I have.

  The CPU 21 performs various data processing and instructions to various control circuits based on the calculation function. Thereby, the CPU 21 controls the entire sensor data distribution device 2 and the sensor network management device 5. The CPU 21 collects the detection data from the sensor network management device 5 and provides the detection data according to the request of the client terminal device 4 to provide a signal input unit 211, a request condition management unit 212, a detection data acquisition unit 213, a condition It functions as each functional block of the matching processing unit 214, the data processing unit 215, and the data output unit 216. These functional blocks are realized by the CPU 21 executing a predetermined program on the storage unit 22.

  Hereinafter, each functional block will be described with reference to respective processing examples at the time of receiving a request condition from the client terminal device and at the time of receiving detection data from the sensor network management device.

When the request condition is received from the client terminal device The signal input unit 211 sends the request condition of the detection data transmitted from the client terminal device and received by the communication interface 23 to the CPU 21 with the sensor data sorting device 2 as the transmission destination. input.

  The request condition management unit 212 registers the detection data request condition in the request condition table 222 based on the input detection data request condition. FIG. 9 shows a data configuration example of the requirement condition table. Here, the request source address indicates the address of the client terminal device that transmitted the request. The designation method number represents the content of the condition requested by the client terminal device, and an example of the data content is shown in FIG. When receiving detection data, which will be described later, the corresponding request source address is searched by matching the detection data with the request condition table according to the condition specified by the specifying method number. Further, the request condition management unit 212 transmits a request for clearing unnecessary ID data to the unnecessary ID notification unit 217 simultaneously with the registration of the request condition of the detection data.

-At the time of detection data reception from a network management device Below, the flow of processing of a sensor data distribution device at the time of detection data reception from a sensor network management device is explained.

  The signal input unit 211 inputs detection data transmitted from the sensor network management device 5 and received by the communication interface 23 into the CPU 21. The detection data acquisition unit 213 stores the detection data sent from the signal input unit 211 in the detection data temporary storage table 223 of the storage unit 22. FIG. 11 shows a data configuration example of the detection data temporary storage table.

  The condition matching processing unit 214 retrieves the detection data from the detection data temporary storage table 223, performs matching with each condition in the request condition table 222, and sets a set of addresses that match the condition and a set of received detection data as matching data. Store in the temporary storage table 221. At that time, detection data corresponding to the number of sets of matched addresses are copied and stored. Also, detection data that does not match any of the required conditions is discarded. If none of the required conditions is met and a detection data value check counter (described later) is greater than 0, the transmission source address and sensor ID are notified to the unnecessary ID notification unit 217. FIG. 12 shows an example of the data structure of the abutting data temporary storage table.

  The unnecessary data notification unit 217 requests registration of unnecessary ID data of the corresponding sensor ID to the corresponding sensor network management device via the communication interface 23 from the transmission source address notified by the condition matching processing unit 214. In addition, the unnecessary ID notification unit 217 sends unnecessary ID data to the sensor network management apparatus connected via the communication interface 23 in response to a request for clearing unnecessary ID data sent from the request condition management unit 212 described above. Send a clear request.

  The data processing unit 215 retrieves data from the coincidence data temporary storage table 221 and sends it to the data output unit 216. The data output unit 216 outputs the detection data to the communication interface 23 in order to transmit the detection data sent from the data processing unit 215 to the client terminal device having the address sent from the data processing unit 215. To do.

  In the following, the processing flow in the condition matching processing unit 214 until the transmission destination of the detection data extracted from the detection data temporary storage table is determined and stored in the matching data temporary storage table is shown in FIG. 13 and FIG. This will be described in detail with reference to the flowchart.

  The condition matching processing unit 214 takes out the detection data from the detection data temporary storage table 223 (S1). Next, the condition matching processing unit 214 takes out the request condition from the request condition table 222 (S2). If it is necessary to collate the sensor type from the specified method number of the retrieved request condition (S3), the “sensor type” of the detection data acquired from the detection data temporary storage table 223 and the “sensor type” of the request condition (S4). If the condition is met, proceed to the next condition. If the condition is not matched, the next required condition is extracted (S2).

  Next, when it is necessary to collate the installation location according to the designation method number of the requirement condition (S5), the “installation location” of the detection data acquired from the detection data temporary storage table 223 and the “installation location” of the requirement condition (S6). If the condition is met, proceed to the next condition. If the condition is not matched, the next required condition is extracted (S2).

  Next, when the matching of the position condition is necessary from the request condition designation method number (S7), the “position” of the detection data acquired from the detection data temporary storage table 223 and the request condition acquired from the request condition table The calculation for matching is performed from the “position condition” (S8). If the condition is met, proceed to the next condition. If the condition is not matched, the next required condition is extracted (S2).

  Next, from the request method designation method number, when the detection data value needs to be matched (S9), the detection data “detection data value” acquired from the detection data temporary storage table 223 and the request condition “detection” are detected. Comparison with “data conditions” is performed (S10). When the condition is met, the detection data value check counter is incremented (S11). If the condition is not matched, the next required condition is extracted (S2). The detection data value check counter is a counter used when extracting unnecessary sensor IDs.

  The search process searches for the address of the request source requesting the detection data, and stores the detection data in the matching data temporary storage table in association with the address (S12). If none of the required conditions is met, the detection data is discarded. Further, the detection data value check counter = 0, and the “sensor ID” and “transmission source address” of the detection data are the “sensor ID” and “transmission source address” of the detection data last stored in the coincidence data temporary storage table. If not, the transmission source address and sensor ID are notified to the unnecessary ID notification unit 217 (S13, S14).

It is a block diagram which shows the whole structure of the sensor data distribution delivery system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of the data communication form between a sensor data distribution apparatus and a sensor network management apparatus. It is a conceptual diagram which shows the example of the data communication form between a sensor data distribution apparatus and a client terminal device. It is a block diagram which shows the internal structure of a client terminal device. It is a block diagram which shows the internal structure of a sensor network management apparatus. It is a figure which shows the structural example of the data of an attribute data table. It is a figure which shows the structural example of the data of a detection data temporary storage table. It is a block diagram which shows the internal structure of a sensor data distribution apparatus. It is a figure which shows the structural example of the data of a requirement condition table. It is a figure which shows the example of the data content of the designation | designated method number in a request condition table. It is a figure which shows the structural example of the data of a detection data temporary storage table. It is a figure which shows the structural example of the data of an abutting data temporary storage table. It is a flowchart which shows the flow of a process in a condition matching process part until the transmission destination of the detection data taken out from the detection data temporary storage table is determined, and it stores in a matching data temporary storage table. It is a flowchart which shows the flow of a process in a condition matching process part until the transmission destination of the detection data taken out from the detection data temporary storage table is determined, and it stores in a matching data temporary storage table.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sensor data distribution delivery system 2, 2a, 2b Sensor data distribution apparatus 3, 3a, 3b Sensor network 4, 4a, 4b Client terminal apparatus 5 Sensor network management apparatus 6 Sensor node 21, 41, 51 CPU
22, 42, 52 Storage unit 23, 43, 53 Communication interface 211 Signal input unit 212 Request condition management unit 213 Detection data acquisition unit 214 Condition matching processing unit 215 Data processing unit 216 Data output unit 217 Unnecessary ID notification unit 221 Matching data temporary Storage table 222 Request condition table 223,522 Detection data temporary storage table 411 Input processing unit 412 Request signal generation unit 413 Detection data acquisition unit 421 Data storage table 54 Sensor interface 55 Clock 511 Temporary storage data extraction unit 512 Data input / output unit 513 Data Input unit 515 Data conversion unit 516 Detected data temporary storage unit 517 Sensor attribute reference unit 518 Unnecessary ID registration unit 521 Attribute data table 523 Unnecessary ID table

Claims (11)

Combines sensor networks connected to multiple sensor nodes that are individually managed by different management entities, collects detection data from the sensor nodes, and requests detection data from multiple clients with different request conditions. In the sensor data distribution system that provides
A sensor network management device having a function of collecting detection data from the sensor node;
A plurality of client terminal devices installed corresponding to the plurality of clients, having a function of transmitting a request for detection data desired by the client and receiving distribution of the detection data;
A sensor data distribution device having a function of receiving detection data sent from the sensor network management device and copying and transmitting detection data according to a request from the client terminal device to the client terminal device;
A sensor data distribution and delivery system comprising: The sensor network management device includes:
An unnecessary ID table in which sensor IDs that do not need to be transmitted to the sensor data distribution device are registered;
In accordance with an unnecessary ID registration request sent from the sensor data sorting device, a sensor ID that does not need to be sent to the sensor data sorting device is registered in the unnecessary ID table, or sent from the sensor data sorting device. In accordance with an unnecessary ID data clear request, an unnecessary ID registration unit that clears unnecessary ID data in the unnecessary ID table;
When the sensor ID in the detection data sent from the sensor node is not the sensor ID registered in the unnecessary ID table, the detection data is sent to the sensor data sorting device, and the sensor ID in the detection data sent from the sensor node 2. The sensor data distribution system according to claim 1, further comprising: an unnecessary data filter unit that discards the detection data when registered in the unnecessary ID table. The client terminal device
A sensor type that is a combination of a detection content that represents the type of sensor and a detection unit that represents a unit of a measurement value output by the sensor that has measured the detection data, an installation location that represents the installation status of the sensor that has measured the detection data, and Detecting the geographical range that the client wants to collect data for, the position condition that represents the combination of the center position, which is the center coordinate, and its radius, and the range of required values among the measurement values output by the sensor An input processing unit that performs an input process when a user inputs a request condition including a data value condition or a combination thereof;
2. A request signal generation unit that performs a process of generating a request signal based on a request condition sent from an input processing unit and sending the request signal to the sensor data sorting device. 2. The sensor data distribution system according to 2. The sensor data distribution device is
A request condition table for storing request conditions sent from the client terminal device;
A request condition management unit that transmits a request for clearing unnecessary ID data to the sensor network management device at the same time as registering the request condition in association with a request source address in the request condition table;
A detection data temporary storage table for temporarily storing detection data sent from the sensor network management device;
A collision data temporary storage table for temporarily storing detection data matching the request conditions;
The detection data is extracted from the detection data temporary storage table, matched with each condition of the request condition table, and the detection data is duplicated in association with the request source address of the request condition for the number matching the condition, and the match A condition matching unit for storing in the data temporary storage table, discarding any detection data that does not match any request condition, and notifying the source address and sensor ID of the detection data;
An unnecessary ID notification unit that transmits the unnecessary sensor ID notified by the condition matching unit to the sensor network management device of the transmission source address of the discarded detection data;
The sensor data distribution according to any one of claims 1 to 3, further comprising an output data processing unit that extracts data from the match data temporary storage table and distributes detection data to a request source address. Distribution system. Sensor network comprising a sensor network comprising a sensor network management device to which a plurality of sensor nodes individually managed by different management entities are connected, a client terminal device installed corresponding to the client, and a sensor data distribution device In the sensor data distribution method of the system,
The client terminal device transmits a request condition for detection data desired by the client to the sensor data sorting device,
Sending detection data collected from the sensor node to the sensor data distribution device from the sensor network management device,
When the sensor data distribution device matches the content of the detection data sent from the sensor network management device with the request condition sent from the client terminal device, and the detection data matches the request condition Distributes the detection data to the client terminal device.   In the sensor data distribution device, the contents of the detection data sent from the sensor network management device are matched with the request conditions sent from the client terminal device, and the contents of the detection data are all the clients. When the request condition of the terminal device does not match, the sensor ID that collected the detection data is transmitted to the sensor network management device that is the transmission source of the detection data that does not match the request condition. 6. The sensor data distribution and delivery method according to claim 5, wherein the network management device thereafter discards the information of the designated sensor ID.   The request condition sent from the client terminal device is a sensor type that is a combination of a detection content indicating a sensor type and a detection unit indicating a unit of a measurement value output by a sensor that measures the detection data. The sensor data distribution delivery method according to claim 5 or 6.   The sensor data distribution and delivery method according to claim 5 or 6, wherein the request condition sent from the client terminal device is an installation location that represents a situation where a sensor that has measured detection data is installed.   7. The sensor data according to claim 5, wherein the request condition sent from the client terminal device is a position condition represented by a combination of a center position that is a center coordinate designated by the client and its radius. Distribution method.   7. The sensor data distribution according to claim 5, wherein the request condition sent from the client terminal device is a detection data value condition that is a range of measurement values output by a sensor that has measured detection data. 8. Minute delivery method.   The request condition sent from the client terminal device measures the sensor type and detection data, which is a combination of the detection content representing the sensor type and the detection unit representing the unit of the measurement value output by the sensor that measured the detection data. This is the range of the measurement value output by the sensor that measured the detection data, the installation location that represents the installation status of the selected sensor, the position condition expressed by the combination of the center position and the radius that is the center coordinate specified by the client The sensor data distribution and delivery method according to claim 5 or 6, wherein any combination of two or more of the detected data value conditions is combined.

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