COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM

• US 20150249726A1
• Filed: 10/23/2012
• Published: 09/03/2015
• Est. Priority Date: 10/23/2012
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Kuroiwa, Takeru
• Granted Patent: US 9,680,969 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A duplication identifier, a substitutor, and a memory controller perform the steps of: comparing information newly acquired by an acquirer and information stored in an operation data memory; determining whether or not at least a portion of the newly acquired information matches a portion of the information stored in the operation data memory; when it is determined that there is no matching portion causing the information acquired by the acquirer to be stored in the operation data memory; and when it is determined that at least a portion of the newly acquired information matches a portion of the information stored in the operation data memory, substituting the information of the portion determined to match the information stored in the operation data memory among the newly acquired information with predetermined information with a smaller volume than the information of the portion, and storing the information in the operation data memory.

Claims

1. A communication device comprising:

an acquirer for acquiring information;

a determiner for comparing information newly acquired by the acquirer and information previously acquired by the acquirer and determining whether or not at least a portion of the newly acquired information matches a portion of the previously acquired information, and when it is determined that at least a portion of the newly acquired information matches a portion of the previously acquired information, and substituting the information of the portion determined to match the previously acquired information among the newly acquired information with predetermined information with a smaller volume than the information of the portion; and

a transmitter for transmitting information in which the information of the portion determined to match the previously acquired information among the newly acquired information is substituted with predetermined information.

2. The communication device according to claim 10, wherein:

the information stored in the information memory contains acquisition timing of when the information was acquired by the acquirer; and

when information is newly acquired by the acquirer, the determiner compares the newly acquired information and information indicating a most recent acquisition timing among information not containing the predetermined information stored in the information memory, and identifies the information of the matching portion.

3. The communication device according to claim 1, comprising:

a receiver for receiving the information transmitted from the transmitter;

an information identifier for identifying information containing the predetermined information and information not containing the predetermined information, contained in the information received by the receiver;

a substitution identifier for comparing the information containing the predetermined information identified by the information identifier and the information not containing the predetermined information identified by the information identifier, and identifying information of the matching portion substituted with the predetermined information; and

a regenerator for regenerating information containing the predetermined information by substituting the predetermined information with the information of the matching portion identified by the substitution identifier.

4. The communication device according to claim 3, wherein when information is received by the receiver, the substitution identifier identifies the information of the matching portion substituted with the predetermined information, for each item of information containing the predetermined information, by comparing the information containing the predetermined information contained in the information received by the receiver, and information indicating a most recent acquisition timing among the information not containing the predetermined information and indicating an acquisition timing prior to an acquisition timing of the information.

5. The communication device according to claim 10, comprising:

a reception unit for receiving a selection of information transmitted from the transmitter by causing a user to specify an acquisition timing contained in the information; and

an extractor for extracting, from the information memory, information corresponding to the acquisition timing received by the reception unit;

wherein the extractor, when the predetermined information is contained in the information indicating an oldest acquisition timing among the information corresponding to the acquisition timing received by the reception unit, retrieves from the information memory information indicating a most recent acquisition timing among the information not containing the predetermined information and indicating an acquisition timing prior to the information indicating the oldest acquisition timing, compares the retrieved information to the information indicating the oldest acquisition timing, identifies the information of the matching portion substituted with the predetermined information, substitutes the predetermined information contained in the information indicating the oldest acquisition timing with the identified data, and extracts the information corresponding to the acquisition timing received; and

the transmitter transmits the information extracted by the extractor.

6. The communication device according to claim 1, wherein when the information acquired by the acquirer is converted to text data, the predetermined information is information not used in the text data.

7. The communication device according to claim 1, comprising:

a converter for converting the information acquired by the acquirer into text data; and

an output device for outputting the text data converted by the converter.

10. The communication device according to claim 1, comprising:

an information memory;

wherein the determiner compares information newly acquired by the acquirer and information stored in the information memory and determines whether or not at least a portion of the newly acquired information matches a portion of the information stored in the information memory, and when it is determined that there is no matching portion causes the information acquired by the acquirer to be stored in the information memory, and when it is determined that at least a portion of the newly acquired information matches a portion of the information stored in the information memory, substitutes the information of the portion determined to match the information stored in the information memory among the newly acquired information with predetermined information with a smaller volume than the information of the portion, and causes the information to be stored in the information memory; and

the transmitter transmits the information stored in the information memory.

11. A monitoring system comprising:

the communication device according to claim 1; and

equipment;

wherein the acquirer acquires the information transmitted from the equipment.

8. A communication method for a communication device, the communication method including:

an acquisition step in which the communication device acquires information;

a determination step in which the communication device compares information newly acquired in the acquisition step and information previously acquired in the acquisition step and determines whether or not at least a portion of the newly acquired information matches a portion of the previously acquired information, and when it is determined that at least a portion of the newly acquired information matches a portion of the previously acquired information, and substitutes the information of the portion determined to match the previously acquired information among the newly acquired information with predetermined information with a smaller volume than the information of the portion; and

a transmission step in which the communication device transmits information in which the information of the portion determined to match the previously acquired information among the newly acquired information is substituted with predetermined information.

9. A computer-readable non-transitory recording medium that stores a program for causing a computer that controls a communication device to realize:

an acquisition function for acquiring information;

a determination function for comparing information newly acquired by the acquisition function and information previously acquired by the acquisition function and determining whether or not at least a portion of the newly acquired information matches a portion of the previously acquired information, and when it is determined that at least a portion of the newly acquired information matches a portion of the previously acquired information, and substitutes the information of the portion determined to match the previously acquired information among the newly acquired information with predetermined information with a smaller volume than the information of the portion; and

a transmission function for transmitting information in which the information of the portion determined to match the previously acquired information among the newly acquired information is substituted with predetermined information.