JP5759773B2 - Monitoring system, communication device, and communication control method - Google Patents

Description

  The present invention relates to a monitoring system, a communication device, and a communication control method thereof, and more particularly, to a communication device connected between a plurality of networks and a communication control method thereof.

  In recent years, there is an increasing demand for remote monitoring of equipment monitoring and maintenance, such as boilers and thermal turbines, and energy consumption monitoring from the center side away from the site. Ideally, all the data of sensors and surveillance cameras installed at the end of such a monitoring system should be centralized and managed at the center. However, as the number of sensors and cameras increases, it is becoming difficult to constantly collect all data in the center due to the traffic capacity that can be transmitted by the network.

  In order to cope with such a current situation, for example, Patent Document 1 discloses a technique for controlling the priority of transfer / display of image data from a camera.

JP 2009-171471 A

The following factors can be considered as a factor of the difficulty of aggregation of all the data mentioned above.
-Since the number of terminals with high data rates, such as camera moving images, increases and the number of terminals increases year by year, the total capacity of data generated in the network is the traffic capacity that can be transmitted over the network (usually Ethernet (registered trademark)) Therefore, it exceeds 100 M to 10 Gbps).
・ Due to the increase in the number of network terminals, the difference between the average value and the maximum value of the total traffic volume is large.
・ When a public network such as the Internet is used for the network, the amount of traffic generated under the same network cannot be predicted.
・ Especially when using wireless communication, the transmission capacity varies depending on radio wave propagation conditions.

  Furthermore, even if the network traffic capacity is sufficient, there is a need to minimize the communication cost when using a pay network (especially pay-per-use).

If the network traffic capacity is insufficient or fluctuates as described above, it is not possible to consolidate all data at the center at all times. For example, a connection is made between a local network with a monitoring target and a wide area network with a center. In communication equipment,
・ Compress the data of each sensor terminal to the amount that can be communicated under the worst network conditions and send it to the center ・ Select only the data of the sensor terminal with high priority and send it to the center
Such a method can be considered. On the other hand, the center performs statistical processing and alarm determination processing on the received sensor data, and the monitoring person analyzes the result to grasp the state of the monitoring target.

  However, in the former method among the above methods, if the compression rate of each received sensor data is high, the statistical processing result with sufficient accuracy may not be obtained, and the status of the monitoring target may not be correctly determined. There is sex. In the latter case, if the number of sensor terminals with high priority is large, the communication device can only transmit data of some of the terminals. For this reason, the center can obtain only the alarm determination processing results of some terminals, and may not be able to correctly determine the status of the monitoring target.

  An object of the present invention is to provide a monitoring system that ensures data communication necessary for alarm determination processing even when the network capacity is insufficient and fluctuates while fully utilizing the capacity of the network, and a communication device for the monitoring system, and It is to provide a communication control method.

  In order to solve at least one of the various problems described above, the monitoring system of the present invention is a communication connected to a first network to which a plurality of communication terminals are connected and a second network to which a management center is connected. The communication device is a device connected to the plurality of communication terminals, collected by the plurality of sensors, sensed by the surrounding state of the monitoring target via the first network, and after processing In this mode, the information is transmitted to the information processing apparatus via the second network.

  Furthermore, the communication device performs alarm detection and data statistical processing according to the alarm status based on data collected from a plurality of communication terminals, the alarm status, the communication status of the local network as the first network, In this mode, data to be transmitted to the information processing apparatus is selected from the communication status of the wide area network that is the second network.

  ADVANTAGE OF THE INVENTION According to this invention, the data communication required for an alarm determination process can be ensured at the time of the shortage and fluctuation | variation of network capacity, fully utilizing the capacity | capacitance of a network in a monitoring system.

1 is an overall configuration diagram of a monitoring system according to an embodiment of the present invention. 1 is a functional block diagram of a network interconnection device according to an embodiment of the present invention. It is a figure which shows sensor measurement information. It is a table | surface which shows the information hold | maintained at a sensor data recording table. It is a table | surface which shows the information hold | maintained at the newest sensor data recording table. It is a table | surface which shows the information hold | maintained at a separate warning condition table. It is a table | surface which shows the information hold | maintained at a separate warning determination result table. It is an example of the flow of the individual alarm detection process in an individual alarm detection part. It is a table | surface which shows the information preserve | saved at a group information table. It is a table | surface which shows the information preserve | saved at a group sensor data recording table. It is an example of the flow of the group sensor data recording process in a group sensor data recording part. It is a table | surface which shows the information preserve | saved at a group warning condition table. It is a table | surface which shows the information preserve | saved at a group warning determination result table. It is an example of the flow of the group alarm detection process in a group alarm detection part. It is a table | surface which shows the information preserve | saved at a priority designation | designated table. It is an example of the flow of the filter selection process in a filter selection part. It is a figure which shows group warning related report information. It is a figure which shows individual warning related report information. It is a figure which shows the newest sensor measurement condition report information. It is a figure which shows sensor time series report information. It is a table | surface which shows an example of the information preserve | saved at a priority designation | designated table. It is a figure which shows another structural example of a network interconnection apparatus.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall configuration diagram of a monitoring system according to the first embodiment. The monitoring system according to this embodiment includes a management center 130, one or more network interconnection devices 110 connected to the management center 130 by the wide area network 150, and one or more networks connected to the network interconnection device 110 by the local network 140. Communication terminal 120. The management center 130 acquires information about the monitoring target acquired by the plurality of communication terminals 120 via the network interconnection device 110, and monitors the monitoring target.

  The communication terminal 120 has a sensor and a communication interface. Communication terminal 120 notifies sensor interconnection information measured using the sensor to network interconnection apparatus 110 through local network 140 via a communication interface. Further, the communication terminal 120 may change the operation of either or both of the sensor and the communication interface in accordance with control from the network interconnection device 110 through the local network 140. Here, the sensor is a sensor that can operate independently, such as a temperature sensor, a humidity sensor, and an acceleration sensor, or a sensor that uses an external signal input such as a position sensor using GPS, or a voice or stationary sensor. Either a monitoring device or a combination of monitoring devices that acquire images and videos.

  The network interconnection device 110 has a local network communication interface and a wide area network communication interface, and is a communication apparatus connected to the local network 140 and the wide area network 150. The network interconnection device 110 aggregates sensor measurement information notified from the communication terminal 120 through the local network 140 and notifies the management center 130 through the wide area network 150. The network interconnection device 110 may change the operation of the network interconnection device 110 in accordance with control from the management center 130 via the wide area network 150. The network interconnection apparatus 110 may change the operation of the communication terminal 120 through the local network 140 in accordance with control from the management center 130 through the wide area network 150.

  The management center 130 has a wide area network communication interface and is an information processing apparatus that receives sensor measurement information collected by the network interconnection apparatus 110 through the wide area network 150. The management center 130 may have one or more of a storage device that stores the received sensor measurement information, an analysis device that analyzes the sensor measurement information, and a display device that displays the sensor measurement information. The management center 130 may control the operation of one or both of the network interconnection device 110 and the communication terminal 120.

  The local network 140 is, for example, a PAN (Personal Area Network) using IEEE 802.15.4 for the physical layer, or a LAN (Local Area Network) using, for example, IEEE 802.11 or IEEE 802.3 for the physical layer, or It is a cellular network or a wireless or wired network composed of a combination thereof.

  The wide area network 150 is, for example, a LAN using IEEE802.11 or IEEE802.3 for the physical layer, or a MAN (Metropolitan Area Network) using IEEE802.16 for the physical layer, or a cellular network, or It is a wireless or wired network consisting of the above.

  FIG. 2 shows an example of the configuration of the network interconnection device in the monitoring system of the present embodiment. The network interconnection apparatus in this embodiment includes a network interconnection apparatus control unit 200, a local network communication unit 201, a wide area network communication unit 202, a network quality determination unit 203, a sensor data recording unit 211, a latest sensor data extraction unit 212, an individual An alarm detection unit 213, a group sensor data recording unit 214, a group alarm detection unit 215, a filter selection unit 221, and a filter unit 222 are included.

  The network interconnection device control unit 200 holds parameters used in each unit of the network interconnection device, receives control information from each unit, provides control information and parameters to each unit, and controls operation timing of each unit .

  The local network communication unit 201 communicates with one or a plurality of communication terminals 120 via the local network 140. Sensor measurement information transmitted from the communication terminal 120 to the network interconnection device 110 is received by the local network communication unit 201 and passed to the sensor data recording unit 211.

  FIG. 3 is a diagram showing sensor measurement information. The sensor measurement information includes a communication terminal ID 300 and a sensor value 301 as shown in FIG. 3A. The communication terminal ID 300 is a value for identifying the communication terminal. The sensor value 301 is a scalar value or a vector value measured using a sensor of a communication terminal, and includes, for example, one or a plurality of combinations of values such as temperature, humidity, pressure, acceleration, position, and flow rate.

  The sensor measurement information may include time information 302 in addition to the communication terminal ID 300 and the sensor value 301 as shown in FIG. 3B. The time information 302 is a value representing the time when the sensor performs measurement or the time when the communication terminal transmits the sensor measurement information.

The wide area network communication unit 202 communicates with the management center 130 via the wide area network 150. The wide area network communication unit 202 receives information to be reported to the management center 130 from the filter unit 222 and transmits the information to the management center 130 through the wide area network 150. The wide area network communication unit 202 receives information necessary for the operation of the network interconnection device such as the individual warning condition table, the group information table, the group warning condition table, and the priority designation table from the management center 130. You may notify with respect to the control part 200. FIG. The wide area network communication unit 202 collects information related to communication via the wide area network 150 and notifies the network quality determination unit 203 of the information. The wide area network communication unit 202 receives the reception response for information transmitted to the management center 130, may be notified for the network interconnection apparatus control unit 200. The wide area network communication unit 202 receives a transmission signal instruction from the management center 130 and notifies the filter selection unit 221 of the transmission signal instruction.

The network quality determination unit 203 determines the quality of the network based on the information related to communication via the wide area network 150 received from the wide area network communication unit 202 and notifies the filter selection unit 221 of the network quality value. The network quality value is a value having a positive correlation with the network quality determined by the network quality determination unit 203. When it is determined that the network quality B in another situation is higher than the network quality A in one situation, the network quality value corresponding to the network quality B is smaller than the network quality value corresponding to the network quality A. take.

  For example, the network quality determination unit 203 determines that the network quality is higher as the response time from the management center 130 through the wide area network 150 is shorter. Alternatively, for example, the higher the network quality is notified from the management center 130, the higher the network quality is determined. Alternatively, for example, it is determined that the network quality is higher as the time from the start of signal transmission to the end of signal transmission by the wide area network communication unit 202 is shorter. Alternatively, for example, it is determined that the smaller the signal amount stored in the signal transmission buffer, the higher the network quality. Alternatively, for example, the shorter the signal residence time in the signal transmission buffer, the higher the network quality.

  The sensor data recording unit 211 has a sensor data recording table 410, and stores sensor measurement information from each sensor passed from the local network communication unit 201 with time information added to the sensor data recording table as necessary. To do. The sensor data recording unit 211 also outputs information in the sensor data recording table to the request source in response to a request from the filter unit 222 or the latest sensor data extraction unit 212.

FIG. 4 is a table showing information held in the sensor data recording table in the present embodiment. A plurality of, for example, Nt pieces of time information 401, sensor value information 402, and transmission status 403 are recorded for each communication terminal ID 400 and communication terminal ID 400 in the sensor data recording table. The communication terminal ID 400 corresponds to the communication terminal ID 300 of the sensor measurement information received by the local network communication unit 201. Similarly, the sensor value information 402 corresponds to the sensor value 301 of the sensor measurement information. The time information 401 is information representing the time information 302 of the sensor measurement information or the time when the network interconnection device receives the sensor measurement information. The transmission status 403 is information indicating whether or not the network interconnection device has transmitted the sensor measurement information to the management center. The transmission status 403 is set to a value indicating non-transmission, for example, 0 when the sensor measurement information is recorded in the sensor data recording table. The transmission status 403 is set to a value indicating that transmission has been completed, for example, 1 in accordance with an instruction from the network interconnection apparatus control unit 200 . When data exceeding the number of data Nt for each communication terminal ID is stored in the sensor data recording table, for example, data is deleted in order from the oldest time information 401 or data indicating that the transmission status 403 has been transmitted. delete.

The latest sensor data extraction unit 212 has the latest sensor data recording table 510, periodically creates the latest sensor data based on the sensor data obtained from the sensor data recording unit 211, and creates the latest sensor data recording table. The latest sensor data extraction unit 212 also outputs information in the latest sensor data recording table to the request source in response to requests from the filter unit 222, the individual alarm detection unit 213, and the group sensor data recording unit 214.

  FIG. 5 is a table showing information held in the latest sensor data recording table 510. The latest sensor data recording table includes a communication terminal ID 500, latest sensor value information 501, difference sensor value information 502, and no-update continuation information 503. The communication terminal ID 500 corresponds to the communication terminal ID 400 in the sensor data recording table. The latest sensor value information 501 is information indicating the latest sensor data of the communication terminal at the time of operation of the latest sensor data extraction unit. For example, the value obtained by extracting the sensor value information 402 with the latest time information 401 from the sensor data recording table. It is. Alternatively, for example, the time information 401 is a value obtained by extracting and averaging all sensor value information 402 after the previous operation time of the latest sensor data extraction unit from the sensor data recording table.

  The difference sensor value information 502 is information indicating fluctuations in the sensor value of the communication terminal at the time of operation of the latest sensor data extraction unit. For example, the latest sensor value information 501 and the latest sensor at the previous operation time of the latest sensor data extraction unit. This is a difference from the value information 501. Non-update continuation information 503 is information indicating the update status of the latest sensor value information 501 of the communication terminal ID 500. When the latest sensor value information 501 is updated by the latest sensor data extraction unit, the non-update continuation information 503 is set to a value indicating that there is an update, for example, 0. If the sensor value information 402 of the communication terminal ID has not been added since the last operation of the latest sensor data extraction unit and the latest sensor value information 502 is not updated, the no-update continuation information 503 indicates that no update is continued. For example, the value is increased by one.

  Returning to FIG. 2, the individual alarm detection unit 213 includes an individual warning determination result table 710 and performs individual alarm detection processing. In the individual alarm detection process, for each individual warning condition in the individual warning condition table 610 received from the network interconnection device control unit 200, condition determination is performed based on the latest sensor data obtained from the latest sensor data extraction unit. An individual warning determination result table 710 is created. The individual alarm detection unit 213 also outputs information in the individual warning determination result table 710 to the request source in response to a request from the filter unit 222 or the group alarm detection unit 215.

  FIG. 6 is a table showing information held in the individual warning condition table 610. The individual warning condition table includes warning condition ID 600, warning condition information 601, and warning related value designation information 602. The warning condition ID 600 is a number assigned for each warning condition. The warning condition information 601 is a warning condition used by the individual alarm detection unit 213 for warning determination.

  The warning conditions are, for example, that the latest sensor value is within a certain range, that the latest sensor value is outside the certain range, that the difference sensor value is within the certain range, that the difference sensor value is outside the certain range, The non-update continuation information is within a certain range, the non-update continuation information is outside a certain range, the difference or ratio between the latest sensor value and the difference sensor value is within a certain range, the latest sensor value and the difference sensor For example, the difference or ratio is outside a certain range. The warning related value designation information 602 is information for designating data to be recorded as an individual warning determination result when the individual alarm detection unit 213 determines that the warning condition is satisfied. For example, it is any one or a combination of the latest sensor value, the difference sensor value, and the non-update continuation information. The contents of the individual warning condition table 610 may be set when the network interconnection device is initialized, or may be set from the management center through the wide area network.

  FIG. 7 is a table showing information stored in the individual warning determination result table 710. The individual warning determination result table includes warning condition ID 700, warning determination terminal number information 701, warning determination terminal ID information 702, and warning related value information 703. The warning condition ID 700 corresponds to the warning condition ID 600 of the individual warning condition table. The warning determination terminal number information 701 is the number of terminals that satisfy the warning condition detected by the individual alarm detection process for each warning condition. The warning determination terminal ID information 702 is an ID of a terminal determined to satisfy the warning condition by the individual alarm detection process. The warning related value information 703 is sensor data of a terminal that is determined to satisfy the warning condition by the individual alarm detection process.

  FIG. 8 is an example of the flow of the individual alarm detection process in the individual alarm detection unit 213. In the individual alarm detection process, first, as the initialization of the individual warning determination result table in the process 800, the number of warning determination terminals for each warning condition is set to 0, and the warning determination terminal information and the warning related value information are deleted. Next, iterates from 801 to 807, terminal IDs n = 1 to N (N is the total number of terminals), and warning condition IDs c = 1 to C (C is the total number of warning conditions).

  In the repetitive process, first, in the process 802, the warning condition with the warning condition ID = c and the latest sensor data with the communication terminal ID = n are acquired from the latest sensor data recording table. Next, in process 803, it is determined whether or not the latest sensor data acquired in process 802 satisfies the warning condition acquired in the process. If the warning condition is not satisfied, the warning condition ID = c and the communication terminal ID are determined. = N The repetition process ends. If the warning condition is satisfied in processing 803, then in processing 804, 1 is added to the number of warning determination terminals of the warning condition ID = c in the individual warning determination result table. Next, in process 805, terminal ID = n is added to the warning determination terminal information of warning condition ID = c in the individual warning determination result table. Next, in process 806, the latest sensor data is written in the warning related value according to the warning related value designation information c, and the repetition process of the warning condition ID = c and the communication terminal ID = n is ended. For example, if the warning related value designation information c is designated as a differential sensor value, the differential sensor value in the latest sensor data is described as the warning related value.

Returning to FIG. 2, the group sensor data recording unit 214 has a group sensor data recording table 1010 and is obtained from the latest sensor data extraction unit 212 based on the group information table 910 received from the network interconnection device control unit 200. The latest sensor data is grouped to create a group sensor data recording table 1010 . The group sensor data recording unit 214 also outputs information in the group sensor data recording table 1010 to the request source in response to a request from the group alarm detection unit 215.

FIG. 9 is a table showing information stored in the group information table 910. The group information table 910 includes a group ID 900, group communication terminal number information 901, and group communication terminal list information 902. The group ID 900 is an ID for each group, the group communication terminal number information 901 is the number of communication terminals belonging to each group, and the group communication terminal list information 902 is a list of IDs of communication terminals belonging to each group.

  For example, when communication terminals with communication terminal ID = n1, n2, n3 belong to the group with group ID = g, the number of group communication terminals with group ID = g is 3, and the group communication terminal list is n1, n2, n3. There may be any relationship between a group and a communication terminal. For example, there may be a group to which all communication terminals belong, or a group to which only one communication terminal belongs. Further, there may be terminals that do not belong to any group, and there may be terminals that belong to a plurality of groups. Further, for example, there may be a group in which communication terminals that are spatially close together, a group in which communication terminals with similar environments are grouped, or a group in which communication terminals are randomly selected. The contents of the group information table may be set when the network interconnection device is initialized, or may be set from the management center through the wide area network.

  FIG. 10 is a table showing information stored in the group sensor data recording table 1010. The group sensor data recording table 1010 includes a group ID 1000, group non-update terminal number information 1001, group representative value information 1002, and group fluctuation value information 1003. The group ID 1000 corresponds to the group ID 900 in the group information table. The group non-update terminal number information 1001 is information indicating the number of communication terminals whose data has not been updated for a predetermined period among the communication terminals belonging to the group. The group representative value information 1002 is a value representative of the statistical properties of the group. For example, a rank value such as an average value, a variance, a maximum value / minimum value / median value, such as a difference between the maximum value and the median value. Any or a combination of differences between rank values.

  The group variation value information 1003 is a value representing the variation in the statistical properties of the group, and is, for example, the difference or ratio between the latest representative value and the previous representative value. Alternatively, the group variation value information 1003 is a difference or ratio between the latest representative value and the previous representative value and the latest representative value. Alternatively, the group variation value information 1003 is an average value using IIR of the latest representative value and the previous representative value. Alternatively, the group variation value information 1003 is a difference or ratio between the average value using the IIR between the latest representative value and the previous representative value, and the latest representative value.

  FIG. 11 is an example of the flow of group sensor data recording processing in the group sensor data recording unit. In the group sensor data recording process, first, in process 1100, a group information table is acquired from the network interconnection apparatus control unit 200. Next, iterates for 1101 to 1106, group IDs g = 1 to G (G is the total number of groups).

  In the iterative process, first, in process 1102, the latest sensor data of all communication terminals belonging to the group ID = g is acquired from the latest sensor data extraction unit 212. Next, in process 1103, among all communication terminals belonging to the group ID = g, the number of communication terminals for which the non-update continuation information 503 of the latest sensor data does not indicate that there is an update is counted, and the group ID = It is described in the group non-update terminal number information 1001 corresponding to g. Alternatively, in the processing 1103, among all communication terminals belonging to the group ID = g, the number of communication terminals in which the non-update continuation information 503 of the latest sensor data indicates no update for a predetermined period or more is counted, and group sensor data recording is performed. It may be described in the group non-update terminal number information 1001 corresponding to the group ID = g in the table.

  Next, in process 1104, statistical processing is performed from the latest sensor value 501 of the latest sensor data for all communication terminals belonging to group ID = g to create a representative value, and the group representative corresponding to group ID = g in the group sensor recording table It is described in the value information 1002. Here, the representative value is any one or combination of rank values such as average value, variance, maximum value / minimum value / median value, and the difference between rank values such as a difference between the maximum value and the median value. Note that the statistical processing is not performed on all communication terminals belonging to the group ID = g, but among the communication terminals belonging to the group ID = g, communication in which the non-update continuation information 503 of the latest sensor data indicates that there is an update. Only the terminal may be used.

  Next, in processing 1105, variation information is created from the representative value created in processing 1104 and the representative value described in the group representative value information 1002 before performing processing 1104, and the group variation value corresponding to group ID = g. Information 1003 is described, and the repetition process of group ID = g is completed. The fluctuation information is, for example, a difference or ratio between the representative value created in the process 1104 and the representative value described in the group representative value information 1002 before the process 1104 is performed. Alternatively, the variation information is a difference or ratio between the representative value described in the group representative value information 1002 before the processing 1104 and the representative value created in the processing 1104. Or it is the average value using IIR of the representative value described in the group representative value information 1002 and the representative value created in the processing 1104. Alternatively, it is the difference or ratio between the average value using the IIR between the representative value described in the group representative value information 1002 and the representative value created in the process 1104 and the representative value created in the process 1104. The above is the description of FIG.

  Returning to FIG. 2, the group alarm detection unit 215 includes a group warning determination result table 1310 and performs group alarm detection processing. In the group alarm detection process, for each group warning condition included in the group warning condition table 1210 received from the network interconnection device control unit 200, from the group information table 910 and the individual alarm detection unit 213 received from the network interconnection device control unit 200. Condition determination is performed based on the obtained individual warning determination result and the group sensor data obtained from the group sensor data recording unit 214, and a group warning determination result table is created from the determination result. The group alarm detection unit 215 also outputs information in the group warning determination result table to the request source in response to a request from the filter unit 222 or the filter selection unit 221.

  FIG. 12 is a table showing information stored in the group warning condition table 1210. The group warning condition table includes group warning condition ID 1200, group warning condition information 1201, group warning related value designation information 1202, and condition corresponding group list information 1203. The group warning condition ID 1200 is a number assigned for each warning condition. The group warning condition information 1201 is a warning condition for the group alarm detection unit 215 to use for warning determination. There are two types of warning conditions: conditions related to group sensor data and conditions related to individual warning determination results. The conditions related to group sensor data are, for example, that the number of group non-updated terminals is within a certain range, that the number of group non-updated terminals is outside a certain range, that the group representative value is within a certain range, and that the group representative value is Any one or a combination of being out of a certain range, having a group variation value within a certain range, and having a group variation value outside a certain range. The condition related to the individual warning determination result is, for example, that the number of terminals satisfying the condition of warning condition ID = c of the individual warning condition is within a certain range, and the number of terminals satisfying the condition of warning condition ID = c of the individual warning condition is constant. It is out of range, the ratio of the number of terminals satisfying the condition of warning condition ID = c of the individual warning condition is within a certain range, and the ratio of the number of terminals satisfying the condition of warning condition ID = c of the individual warning condition is constant Any one or combination of being out of range.

  The group warning related value designation information 1202 is information for designating information closely related to judgment of warning conditions in the group alarm detection unit 215. Information closely related to warning condition determination is, for example, the number of group non-updated terminals, group representative values, and group fluctuation values when the warning condition is related to group sensor data, or the warning condition is an individual warning determination. This is the number of warning judgment terminals when the condition is related to the result. The condition corresponding group list information 1203 is information for designating a group for which a warning is determined based on the condition. For example, if the contents of the condition corresponding group list information 1203 with the group warning condition ID = s are the group g1, the group g2, and the group g3, the determination based on the warning condition targets only the three groups g1, g2, and g3. Do as.

  FIG. 13 is a table showing information stored in the group warning determination result table 1310. The group warning determination result table 1310 includes group warning condition ID 1300, warning determination group ID information 1301, group warning related value information 1302, and group warning determination result information 1303. The group warning condition ID 1300 corresponds to the group warning condition ID 1200 of the group warning condition table. For each group warning condition ID 1300, warning determination group ID information 1301, group warning related value information 1302, and group warning determination result information 1303 for the number of groups specified in the condition corresponding group list of the group warning condition table are recorded. . For example, when three groups of group g1, group g2, and group g3 are specified in the condition corresponding group list s of the group warning condition table, group g1 is assigned to warning determination group IDs-1, and warning determination group IDs-2 is assigned. Is group g2 and warning judgment group IDs-3 is recorded group g3, and group warning related value information 1302 and group warning judgment result information 1303 are recorded for each.

  In the group warning related value information 1302, information specified in the group warning related value specifying information 1202 of the group warning condition table is recorded. For example, when a group representative value is specified in the group warning related value specification s and the group g1 is recorded in the warning determination group IDs-1, the group warning related value s-1 is stored in the group sensor data recording table. The stored group representative value g1 is recorded. In the group warning determination result information 1303, the alarm detection result of the group alarm detection unit in the group alarm detection unit 215 is recorded. When the group alarm detection unit determines that the group warning condition and the group satisfy the warning condition, a value indicating that the warning condition is satisfied, for example, 1 is recorded in the group warning determination result. When the group alarm detection unit determines that the group warning condition and the group do not satisfy the warning condition, a value indicating that the warning condition is not satisfied, for example, 0 is recorded in the group warning determination result.

  FIG. 14 is an example of the flow of group alarm detection processing in the group alarm detection unit. In the group alarm detection process, first, in the process 1400, the table contents are deleted as an initialization process of the group warning determination result table. Next, iterative processing is performed for 1401 to 1413, group warning condition IDs s = 1 to S (S is the number of all group warning conditions), and group IDs g = 1 to G (G is the number of all groups). Do.

  In the iterative process, first, in a process 1402, the condition corresponding group list s is acquired from the group warning condition table. Next, in branching process 1403, it is determined whether or not group ID = g is included in group list s acquired in process 1402. If it is not included, the iterative process for the group warning condition ID = s and the group ID = g is terminated. If it is included, the process 1404 is executed next. In process 1404, the group warning condition s is acquired from the group warning condition table. In step 1405, group ID = g is recorded in warning determination group ID information corresponding to group warning condition ID = s in the group warning determination result table.

  Next, at branch 1406, it is determined whether the group warning condition s is a condition related to the group sensor data or a condition related to the individual warning determination result. If it is a condition related to the result, the process proceeds to process 1408. In process 1407, the group non-update terminal number g, the group representative value g, and the group fluctuation value g are acquired from the group sensor recording table, and the process proceeds to process 1409. In processing 1408, the terminal ID included in the group communication terminal list g of the group information table is compared with the warning determination terminal ID information of the warning condition c specified by the group warning condition s of the individual warning determination result table, The number of terminal IDs included in both is counted, and the process proceeds to processing 1409.

  In process 1409, the information specified in the group warning related value designation is recorded in the group warning related value information of the group warning determination result table. Next, in a branch 1410, it is determined whether or not the value acquired in the process 1407 or the process 1408 satisfies the group warning condition s. If the condition is satisfied, the process 1411 is performed. If the condition is not satisfied, the process 1412 is performed. Branch. In process 1411, a value indicating that the warning condition is satisfied, for example, 1 is recorded in the group warning determination result of the group warning determination result table, and the iterative process for group warning condition ID = s and group ID = g is ended. In the process 1412, a value indicating that the warning condition is not satisfied, for example, 0 is recorded in the group warning determination result of the group warning determination result table, and the repetition process for the group warning condition ID = s and the group ID = g is ended. The above is the description of FIG.

  Returning to FIG. 2, the filter selection unit 221 transmits the priority notification table 1510 acquired from the network interconnection apparatus control unit 200 and the network quality value notified from the network quality determination unit 203 and the transmission notified from the wide area network communication unit 202. Information to be reported to the management center 130 through the wide area network 150 is determined based on the signal instruction, the individual warning determination result table acquired from the individual alarm detection unit 213, and the group warning determination result table acquired from the group alarm detection unit 215. Then, the filter selection table is notified to the filter unit 222.

  FIG. 15 is a table showing information stored in the priority designation table 1510. The priority specification table is a table for specifying the type and priority of information transmitted from the network interconnection apparatus 110 to the management center 130, and includes report priority 1500, report type information 1501, and report option information 1502. The report priority 1500 is a value that specifies the priority of information specified by the corresponding report type information 1501 and report option information 1502. Note that the higher the priority, that is, the information to be transmitted with priority from the network interconnection device 110 to the management center 130, the value of the report priority 1500 in the priority designation table is smaller.

  Report type information 1501 is information for specifying the type of report content. For example, a communication terminal that reports that the report content is group warning related report information and group warning condition ID, or individual warning related report information and warning condition ID, or the latest sensor measurement status report information. For example, designation of ID or ID range, designation of sensor time series report information, designation of communication terminal ID or ID range to be reported, designation of request information from management center 130, or the like. The report option information 1502 is information specifying information included in each report content and a condition including the information. For example, whether the information included in the report is included, whether the report information is a list, whether to report all information or only information that satisfies a specific condition, or the number of digits of the value to be reported . Further, the report option information 1502 may include a report option for transmission of reduced data used when reducing the data amount, in addition to a report option for transmission of normal data.

  FIG. 16 shows an example of the flow of filter selection processing in the filter selection unit. In the filter selection process, first, the maximum data amount R is created from the network quality value notified from the network quality determination unit 203 in process 1600. Here, the maximum data amount R is a value having a positive correlation with the network quality value. For example, if the network quality value corresponds to a communication speed of about x [bit / second] and the elapsed time from the previous filter selection unit operation to the current filter selection unit operation is y [seconds], R Can be obtained by multiplying the product of x and y by a constant of 1 or less. Next, in process 1601, a variable r indicating the amount of report data is initialized to zero.

  Next, in the filter selection process, the processes 1602 to 1607 are repeated for the report priority of the priority designation table from p = 1 to P (P is the number of all report priorities in the priority designation table). However, this iterative process may be interrupted in the middle of the iterative process due to a conditional branch described later.

  In the iterative process, first, in process 1603, rp which is the data size of the report content of the report priority p is obtained. Next, at branch 1604, it is determined whether the sum of r and rp is less than or equal to R. If the sum of r and rp is less than or equal to R, the process branches to step 1605; otherwise, the process branches to branch 1608. In processing 1605, the data transmission of the report priority p is notified to the filter unit 222. Next, in process 1606, rp is added to the variable r indicating the report data amount, and the repetition process for report priority = p is ended.

  In branch 1608, it is determined whether or not the report option p for reporting priority p includes a report option for reduced data transmission. If included, the process branches to process 1609; otherwise, the process branches to process 1612. To do. In process 1609, rp ', which is the data size of the report content at the time of reduced data transmission, is obtained based on the report option for transmission of reduced data at the report priority p. Next, in branch 1610, if the sum of r and rp 'is equal to or less than R, the process branches to process 1611. Otherwise, the process branches to process 1612. In process 1612, the reduced data transmission of the report priority p is notified to the filter unit 222, and the process proceeds to process 1612. In process 1612, the repetition process is stopped even in the middle of the repetition process related to the report priority p in the priority designation table, and the filter selection process ends. The above is the description of FIG.

  Returning to FIG. 2, the filter unit 222 receives information from the sensor data recording unit 211, the latest sensor data extraction unit 212, the individual alarm detection unit 213, and the group alarm detection unit 215 based on the information notified from the filter selection unit 221. Collected, group warning related report information 1710, individual warning related report information 1810, latest sensor measurement status report information 1910, sensor time series report information 2010 and the like are created and sent to the wide area network communication unit 202.

  FIG. 17 is a diagram showing the group warning related report information 1710. The group warning related report information includes a header 1700 and a group warning condition ID 1701, and may further include any one or a combination of each field of the group warning determination number 1702, the group warning determination result list 1703, and the group warning related value list 1704.

  The header 1700 indicates information included in the group warning related report information. The group warning condition ID 1701 corresponds to the group warning condition ID 1200 of the group warning condition table. The group warning determination number 1702 is the number of groups that satisfy the corresponding group warning condition, and the number of groups indicated as satisfying the warning condition in the group warning determination result information 1303 of the group warning condition ID in the group warning determination result table. It is. The group warning determination result list 1703 corresponds to the group warning determination result information 1303 of the group warning condition ID in the group warning determination result table. The group warning related value list 1704 corresponds to the group warning related value information 1302 of the group warning condition ID of the group warning determination result table.

  With respect to the group warning judgment number 1702, it is possible to specify whether to report or not. For the group warning determination result list 1703, it is possible to specify one of reporting values of all groups as a list, reporting only groups satisfying the group warning determination condition as a list, and not reporting. For the group warning related value list 1704, it is possible to specify one of reporting the values of all groups as a list, reporting only the values of groups satisfying the group warning condition as a list, and not reporting. In addition, the number of digits of the report value can be designated except when the group warning related value list 1704 is not reported.

  For the reduced data transmission of the group warning related report information, the option 1715 is selected so that the transmission data amount is smaller than the option for the normal data transmission. For example, the number of digits of the report value in the group warning related value list 1704 is made smaller when sending reduced data than when sending normal data. Or, for example, the transmission condition is changed so that the group warning determination result list 1703 and the group warning related value list 1704 are transmitted as a full list during normal data transmission, and only a group satisfying the group warning determination condition is transmitted during reduced data transmission. To reduce the amount of data. Or, for example, the data amount is reduced by selecting an item with a small information amount so that the group warning determination result list 1703 is transmitted during normal data transmission and the group warning determination number 1702 is transmitted during reduced data transmission.

  FIG. 18 is a diagram showing the individual warning related report information 1810. The individual warning related report information includes a header 1800 and a warning condition ID 1801, and may further include any one or combination of each field of the warning determination terminal number 1802, the warning determination result list 1803, and the warning related value list 1804.

  The header 1800 indicates information included in the individual warning related report information. The warning condition ID 1801 corresponds to the warning condition ID 600 of the individual warning condition table. The warning determination terminal number 1802 corresponds to the warning determination terminal number information 701 of the warning condition ID in the individual warning determination result table. The warning determination result list 1803 corresponds to the warning determination terminal ID information 702 of the warning condition ID in the individual warning determination result table. The warning related value list 1804 corresponds to the warning related value information 703 of the warning condition ID in the individual warning determination result table.

  With regard to the number 1802 of warning judgment terminals, it is possible to specify whether to report or not. For the warning determination result list 1803, it is possible to specify one of reporting values of all communication terminals as a list, reporting only communication terminals satisfying the warning determination condition as a list, and not reporting. For the warning related value list 1804, it is possible to specify one of reporting the values of all communication terminals as a list, reporting only the values of terminals satisfying the warning condition as a list, and not reporting. Also, the number of digits of the report value can be specified except when the warning related value list 1804 is not reported.

  For the reduced data transmission of the individual warning related report information, the option 1815 of each field is selected so that the transmission data amount is smaller than the option for normal data transmission. For example, the number of digits of the report value in the warning related value list 1804 is made smaller when sending reduced data than when sending normal data. Alternatively, for example, by changing the transmission condition so that the warning determination result list 1803 and the warning related value list 1804 are transmitted as a full list during normal data transmission, and only communication terminals that satisfy the warning determination condition are transmitted during reduced data transmission. Reduce the amount of data. Alternatively, for example, the amount of data is reduced by selecting an item with a small amount of information so that the warning determination result list 1803 is transmitted during normal data transmission and the number of warning determination terminals 1802 is transmitted during reduced data transmission.

  FIG. 19 is a diagram showing the latest sensor measurement status report information 1910. The latest sensor measurement status report information includes a header 1900 and a communication terminal ID list 1901, and may include any one or combination of each field of the latest sensor value list 1902, difference sensor value list 1903, and no-update continuation information list 1904. .

  A header 1900 indicates information included in the latest sensor measurement status report information. The communication terminal ID list 1901, the latest sensor value list 1902, the difference sensor value list 1903, and the no-update continuation information list 1904 are the communication terminal ID 500, latest sensor value information 501, difference sensor value information 502, no update in the latest sensor data recording table, respectively. This corresponds to the continuation information 503.

  For the latest sensor value list 1902, the difference sensor value list 1903, and the no-update continuation information list 1904, it is possible to specify whether to report. In addition, the number of digits of the report value can be specified unless the latest sensor value list 1902 and the difference sensor value list 1903 are not reported. For the non-update continuation information list 1904, it is possible to specify whether to report a normal value or to report a binary determination result whether it is greater than or less than a threshold value.

  For the reduced data transmission of the latest sensor measurement status report information, the ID range 1901 and the option 1915 of each field are selected so that the transmission data amount is smaller than the ID range and option for normal data transmission. For example, the number of digits of the report values in the latest sensor value list 1902 and the difference sensor value list 1903 is made smaller when sending reduced data than when sending normal data. Alternatively, for example, the items to be transmitted are reduced so that the difference sensor value list 1903 and the non-updated continuation information list 1904 are transmitted during normal data transmission and are not transmitted during reduced data transmission. Alternatively, for example, the number of communication terminals that transmit data is reduced so that data of all communication terminals is transmitted during normal data transmission and only data related to communication terminals with some IDs is transmitted during reduced data transmission.

  FIG. 20 is a diagram showing the sensor time-series report information 2010. The sensor time series report information includes a header 2000, a communication terminal ID list 2001, a time information list 2002, and a sensor value list 2003.

  The header 2000 indicates information included in the sensor time series report information. The communication terminal ID list 2001, the time information list 2002, and the sensor value list 2003 correspond to the communication terminal ID 400, time information 401, and sensor value information 402 in the sensor data recording table, respectively.

  In the sensor value list 2003, the number of digits of the report value can be specified. For reduced data transmission of sensor time-series report information, the ID range and option 2015 are selected so that the transmission data amount is smaller than the ID range and option for normal data transmission. For example, the number of digits of the report value in the sensor value list 2003 is made smaller when sending reduced data than when sending normal data. Alternatively, for example, the number of communication terminals that transmit data is reduced so that data of all communication terminals is transmitted during normal data transmission and only data related to communication terminals with some IDs is transmitted during reduced data transmission.

  The order of data may be any order for any of group warning related report information, individual warning related report information, latest sensor measurement status report information, and sensor time series report information. Further, when a plurality of lists are transmitted under the same transmission condition, information in which a plurality of report values are collected may be transmitted as a list.

  In addition to the control described above, the network interconnection apparatus control unit 200 may also control the spontaneous transmission of untransmitted signals using the transmission status. In this case, transmission of unsent data is registered in the report type information 1501 as report information having a large report priority 1500, that is, low priority in the priority designation table. When it is determined in the filter selection process that the transmission of untransmitted data is notified to the filter unit 222, the transmission state 403 of the sensor data recording table from the sensor data recording unit 211 indicates that the filter unit 222 has not transmitted. Acquires value data, creates sensor time-series report information, and transmits it. When the network interconnection device control unit 200 determines that the signal has been transmitted, the network interconnection device control unit 200 notifies the sensor data recording unit 211 that the data signal has been transmitted, and the sensor data recording unit 211 relates to the data in the sensor data recording table. The transmission status is set to a value indicating transmission completion, for example, 1.

  In addition, the network interconnection device control unit receives the data signal when the data signal is transmitted from the filter unit 222 or the wide area network communication unit 202 or when the reception response to the data signal is received by the wide area network communication unit 202. Judge that it has been sent. Further, only the signal transmitted directly as the sensor time-series report information may be used for determining the transmission status of the sensor data recording table. Alternatively, the transmission status of one or a plurality of sensor data recording tables may be determined to have been transmitted based on information generated based on the sensor data recording table, for example, a signal transmitted as the latest sensor measurement status report information.

  FIG. 21 is a table showing an example of information stored in the priority specification table 2110. When the network quality determined by the network quality determination unit 203 is sufficiently high, information on all priorities in the table is transmitted from the network interconnection device 110 to the management center 130. When the network quality is not sufficient, only information that can be transmitted with the network quality is selected and transmitted in the order of higher priority, that is, the report priority value is smaller.

  Based on the report type information and report option information described in 2100 as the report priority 1, the network interconnection apparatus 110 sets the number of groups that satisfy the warning condition specified by the group warning condition ID = 1 to the management center 130 with the highest priority. Send to.

Based on the report type information and the report option information described in 2101 as the report priority 2, the network interconnection device 110 secondly displays the group determination result and the group warning related value based on the warning condition specified by the group warning condition ID = 2. Transmit to the management center 130 with high priority. If the network quality is not sufficient, information about only the group that satisfies the warning condition is transmitted to the management center 130.

Based on the report type information and report option information described in 2102 as the report priority 3, the network interconnection apparatus 110 transmits information corresponding to the request from the management center to the management center 130 with the third highest priority. .

Based on the report type information and the report option information described in 2103 as the report priority 4, the network interconnection apparatus 110 includes the number of communication terminals that satisfy the warning condition specified in the individual warning condition ID = 1 and the communication terminals that satisfy the warning condition. The ID and the warning related value information are transmitted to the management center 130 with the fourth highest priority. If the network quality is not sufficient, the number of digits of the warning related value is reduced and transmitted to the management center 130.

Based on the report type information and the report option information described in 2104 as the report priority 5, the network interconnection device 110 transmits the latest sensor measurement status of all communication terminals to the management center 130 with the fifth highest priority.

Based on the report type information and the report option information described in 2105 as the report priority 6, the network interconnection apparatus 110 sends untransmitted information to the management center 130 with the sixth highest priority among the information in the sensor data recording table. Send to.

  If information having a low priority cannot be obtained in the management center 130 due to reasons such as poor network quality, the individual communication related to the group warning already received from the information having a low priority in the management center 130, for example. It is possible to request the network interconnection device 110 to report the latest sensor measurement status of the terminal and the latest sensor measurement status of the communication terminal that has not been reported for a long time.

  By reporting information related to warning conditions with high priority as described above, important information can be transmitted without delay even when there is a change in network quality. Further, by performing the management center requirement report and untransmitted data transmission, it is possible to compensate for information that could not be transmitted when the quality deteriorated when there is a margin in network quality.

  Note that the segmentation and information recorded in the table shown in the above embodiment are merely examples, and other configurations may be used as long as an equivalent unit can be realized as the entire network interconnection apparatus.

  Also, in the above embodiment, passing data from one part to another only requires that the handed side be in a state where the data can be referred to, so the passed data is the data value itself. Alternatively, a pointer indicating the location of data may be used. Similarly, the data in the table in each unit may be the data value itself or a pointer to the data.

  In the above-described embodiment, various IDs are included in the table and communication contents. However, for example, when the data structure can be distinguished from the order, it is not necessary to explicitly include a field indicating the ID.

  In the above embodiment, the sensor data recording table is provided with a field indicating the transmission status and the unsent data is separately transmitted. However, the latest sensor data recording table, individual warning determination result table, group warning determination result are shown. For other tables such as a table, a field indicating the same transmission status may be provided to transmit unsent data separately.

  In the above embodiment, communication from the network interconnection device 110 via the wide area network 150 to the management center 130 may be made plural in any communication layer. In this case, the wide area network communication unit 202 establishes a plurality of links with the management center 130, and uses different links depending on transmission data. For example, two communication links having different physical layers can be prepared as a plurality of links, and different communication links can be used for reports with a priority higher than a certain level and reports with a priority lower than a certain level in the priority designation table.

  FIG. 22 is a hardware configuration example of the network interconnection device 110. The network interconnection apparatus 110 includes a wide area network communication interface 2202, a local network communication interface 2201, a control unit 2260, a memory 2250, and a data memory 2270.

The wide area network communication interface 2202 is connected to the wide area network 150 corresponding to 202 in FIG. 2 and performs data transmission / reception with the management center.
The local network communication interface 2201 is connected to the wide area network 140 corresponding to 201 in FIG. 2, and performs data transmission / reception with the management center.

  The memory stores programs 2203, 2212, 2213, 2214, 2215, 2200, 2211, 2221, 2222 corresponding to the respective sections 203, 212, 213, 214, 215, 200, 211, 221, 222 of FIG. 2. . The data memory 2270 holds a table similar to that in FIG.

  The control unit 2260 reads each program from the memory 2250, executes processing corresponding to each unit in FIG. 2, totals the data related to the monitoring target collected via the local network 140, and calculates the total result and the wide area network 150 Based on the situation, at least one of the aggregated data and the collected data is sent to the management center via the wide area network communication interface 2202.

  According to the present embodiment, it is possible to ensure data communication necessary for the alarm determination process even when the network capacity is insufficient or fluctuates while fully utilizing the network capacity in the monitoring system. In addition, when a pay-per-use network is used, the communication cost can be reduced. The present embodiment is useful as a monitoring system using a sensor or a monitoring camera, particularly as a monitoring technique for performing priority control in consideration of bandwidth limitation of a broadband network.

DESCRIPTION OF SYMBOLS 110 Network interconnection apparatus 120 Communication terminal 130 Management center 140 Local network 150 Wide area network 200 Network interconnection apparatus control part 201 Local network communication part 202 Wide area network communication part 203 Network quality judgment part 211 Sensor data recording part 212 Latest sensor data extraction part 213 Individual alarm detection unit 214 Group sensor data recording unit 215 Group alarm detection unit 221 Filter selection unit 222 Filter unit

Claims (14)

A terminal that obtains information about the monitoring target by sensing and sends the information to the first network;
An information processing apparatus connected to a second network for managing the monitoring target;
A first communication unit connected to the first network, a second communication unit connected to the second network, a control unit, and a communication device including a memory,
The memory of the communication device has a priority designation table that manages the priority of information to be sent to the information processing device,
The control unit of the communication device
Aggregating the information from a plurality of the terminals;
Based on the aggregated information, an information recording table is created,
Determining whether the information managed in the information recording table satisfies a warning condition;
When the quality of the second network is high, information corresponding to all priorities is sent to the information processing apparatus via the second network,
If the quality of the second network is not high, information that is determined to satisfy the warning condition and has a high priority is sent to the information processing apparatus via the second network.
Monitoring system characterized by that . The monitoring system according to claim 1,
The information processing apparatus measures the communication status of the second network, notifies the communication apparatus of the measured communication status ;
The communication device selects information that can be transmitted with the measured size R of the communication status in descending order of priority.
Monitoring system characterized by that. The monitoring system according to claim 1,
The communication device measures the communication status of the second network, and selects information that can be sent in the measured size R of the communication status in descending order of priority.
Monitoring system characterized by that. The monitoring system according to claim 1,
The terminal
Having a sensor for performing the sensing;
Creating one or more groups to which some or all of the plurality of sensors belong;
The communication device
For each of the plurality of groups, based on information aggregated from the terminals included in the group, statistical processing to create a representative value of the group,
Based on the representative value of the group and the representative value of the previous group, a variation value of the group is created,
And said information recording table, to create a group information recording table for managing the variation of the representative value and the group of the group for each of the groups,
A monitoring system characterized by determining whether information managed in the group information recording table satisfies a warning condition.   5. The monitoring system according to claim 4, wherein the one or more groups are created based on positional information of the plurality of sensors.   The monitoring system according to claim 4, wherein the one or more groups are set in the communication device and the information processing device at the start of operation of the monitoring system. 5. The monitoring system according to claim 4, wherein the one or more groups are created by the information processing apparatus and set for the communication apparatus through the second network. The monitoring system according to claim 1, wherein the communication device determines whether or not the warning condition is satisfied based on a value range of the sensed information . The monitoring system according to claim 1, wherein the communication device determines whether the warning condition is satisfied based on a change in a value of the sensed information . The monitoring system according to claim 1, wherein the communication device determines whether or not the warning condition is satisfied based on a correlation between values of information sensed by the plurality of sensors. . The monitoring system according to claim 1, wherein the communication device determines whether the warning condition is satisfied based on a communication state between the plurality of communication terminals and the communication device. Monitoring system. An aggregation unit that aggregates sensing results from sensors from a plurality of communication terminals via a first network;
A recording unit that creates an information recording table based on information aggregated from a plurality of communication terminals;
A priority specification table for managing the priority of information to be sent,
A determination unit that determines whether information managed in the information recording table satisfies a warning condition;
From the determination result by the determination unit and the communication status of the second network, a selection unit that selects information to be transmitted,
A sending unit for sending the selected information to the management center via the second network;
The selection unit includes:
If the quality of the second network is high, select information corresponding to all priorities as information to be sent,
When the quality of the second network is not high, information that is determined to satisfy the warning condition and is designated with high priority is selected as information to be transmitted. The communication apparatus according to claim 12, is connected to a plurality of the first network, the communication apparatus characterized by. A communication control method for a communication device connected via a first network to a plurality of terminals that perform sensing on a monitoring target and connected via an information processing device that manages the monitoring target and a second network. And
Aggregating information on the monitoring target by the sensing from a plurality of the terminals,
Based on the aggregated information, an information recording table is created,
Managing the priority of information to be sent to the information processing device;
Determining whether the information managed in the information recording table satisfies a warning condition;
When the quality of the second network is high, information corresponding to all priorities is sent to the information processing apparatus via the second network,
If the quality of the second network is not high, the information that is determined to satisfy the warning condition and specified with a high priority is sent to the information processing apparatus via the second network.
A communication control method characterized by the above.

Images