MONITORING SYSTEM, DEVICE, AND METHOD

• US 20120320928A1
• Filed: 02/14/2011
• Published: 12/20/2012
• Est. Priority Date: 02/18/2010
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Takada, May, Ogata, Yuji, Yamada, Masaki, Muranaka, Nobuyuki
• Granted Patent: US 8,879,577 B2
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 47/24 Traffic characterised by specific attributes, e.g. priority or QoS
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 47/38 by adapting coding or compression rate
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 67/61 taking into account QoS or priority requirements
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: Y04S 40/00 Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
• CPC Class Codes: Y04S 40/18 Network protocols supporting networked applications, e.g. including control of end-device applications over a network

Abstract

Provided is a monitoring system which can perform priority control in accordance with the wideband limitation. A priority/filter type selection processing unit (37) of a network interconnection device (11), which connects a local network (14) and a wide area network (10), selects a transmission data selection processing unit (38) on the basis of the priority level definitions of a transmission data in accordance with an event status, and a data compression method in association with the event status and the wide area network communication status, and selects and controls a filtering processing unit (33). As a consequence, the communication bandwidth in a wide area network is reduced.

Claims

1. (canceled)

2. (canceled)

3. (canceled)

4. (canceled)

5. (canceled)

6. A communication control apparatus that implements control so as to receive data items sent from a plurality of terminal nodes over a first network and transmit the data items to a monitoring center over a second network, comprising:

a communication section that communicates with the first network and second network respectively;

a processing section; and

a memory section, wherein

the processing section extracts event statuses on the basis of the data items received from the plurality of terminal nodes via the communication section, and estimates the communication condition of the second network;

the processing section selects a compression class for the data items, which should be transmitted to the monitoring center, according to the communication condition of the second network; and

the processing section determines a priority order of the data items, which should be transmitted, and a compression method on the basis of the event statuses and compression class.

7. The communication control apparatus according to claim 6, wherein the plurality of terminal nodes includes at least one sensor and at least one camera.

8. The communication control apparatus according to claim 6, wherein:

the memory section stores a table in which a transmission order for the data items, which should be transmitted, dependent on the event statuses is recorded; and

the processing section determines the transmission order for the data items, which should be transmitted, on the basis of the table dependent on the event statuses.

9. The communication control apparatus according to claim 6, wherein the processing section determines the communication condition of the second network on the basis of a time difference between a transmitted time of the data items onto the second network, and a received time of the data items at the monitoring center.

10. The communication control apparatus according to claim 6, wherein the processing section has the communication condition of the second network, which is determined by the monitoring center on the basis of a time difference between a transmitted time of the data items onto the second network, and a received time of the data items at the monitoring center, periodically fed back from the monitoring center.

11. The communication control apparatus according to claim 6, wherein the processing section estimates the communication condition of the network on the basis of data received from the monitoring center via the communication section.

12. A communication control method for a communication apparatus that includes a communication section, processing section, and memory section, that receives data items sent from a plurality of terminal nodes over a first network, and that transmits the data items to a monitoring center over a second network, wherein:

the processing section extracts event statuses on the basis of the data items received from the plurality of terminal nodes via the communication section, and estimates the communication conditions of the first and second networks respectively;

the processing section selects a compression class for the data items, which should be transmitted to the monitoring center, according to the communication conditions of the first and second networks respectively, and determines a priority order of the data items, which should be transmitted, and a compression method on the basis of the event statuses and compression class.

13. The communication control method according to claim 12, wherein the plurality of terminal nodes includes at least one sensor and at least one camera.

14. The communication control method according to claim 12, wherein the processing section estimates the communication condition of the second network on the basis of data received from the monitoring center via the communication section.

16. The communication control method according to claim 12, wherein the processing section determines the communication condition of the second network on the basis of a time difference between a transmitted time of the data items onto the second network, and a received time of the data items at the monitoring center.

15. (canceled)

17. The communication control method according to claim 15, wherein the processing section has the communication condition of the second network, which is determined by the monitoring center on the basis of a time difference between a transmitted time of the data items onto the second network and a received time of the transmission data items at the monitoring center, periodically fed back from the monitoring center.