Communication control apparatus for a small-scale network

• US 5,652,840 A
• Filed: 01/12/1995
• Issued: 07/29/1997
• Est. Priority Date: 10/08/1991
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Noda, Sukehisa, Okamoto, Yasushi
• Primary Examiner(s): Donaghue, Larry D.
• Assistant Examiner(s): Rinehart, Mark H.
• Application Number:
  US08/371,944
• Time in Patent Office: 929 Days
• Field of Search: 340/825.7, 340/825.01, 340/825.5, 340/825.52, 340/825.51, 370/85.1, 370/93, 370/94.1, 370/85.13, 395/200.16, 395/200.17
• US Class Current: 709/245
• CPC Class Codes: H04L 12/28 characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] wireless communication networks H04W ; arrangements for dividing the transmission path H04W40/00

Abstract

A communication control apparatus comprising a transmission source/destination address storing unit which stores transmission source addresses specifying a plurality of signal input terminals, and transmission destination addresses paired in advance with signal input terminals in advance; a transmission signal generating unit which adds transmission source addresses and transmission destination addresses corresponding to signal input terminals to which signals have been input; a reception source/destination address storing unit which stores reception source addresses, specifying a plurality of signal output terminals, and reception destination addresses, specifying the transmission source of signals; and a reception signal decoding unit which outputs a signal to one or a plurality of output terminals having the reception source/destination address, stored in the reception source/destination address storing unit, matching the transmission source/destination address transmitted. The communication control apparatus is capable of transmitting a plurality of signals to a plurality of destinations through a communication line without any assistance of another apparatus and is capable of receiving in the same way.

Claims

1. A communication control apparatus, comprising:

a) an external control unit;

b) a plurality of signal input terminals;

c) a plurality of signal output terminals;

d) first transmitting means, comprising

1) transmission data storing means for storing data sets each corresponding to said plurality of signal input terminals respectively given from said external control unit, said each data set including

a. an address data which specifies each of said signal input terminal,

b. an address data which specifies transmission destination of data to be transmitted previously corresponding to each of said signal input terminal when signal input state to any one of said signal input terminals changes, and

c. a communication data indicating change of signal input state to the corresponding signal input terminal;

2) transmission external input terminal controlling means for, when signal input state to any one of said signal input terminal changes, detecting the change, and for selecting the data set corresponding to the signal input terminal on which change of signal input state is detected from the data sets previously stored in said transmission data storing means; and

3) transmission signal composing means for composing a communication frame with respect to the data set selected by said transmission external input terminal controlling means;

e) first receiving means comprising

1) reception data storing means for storing unique address data corresponding to each of said plurality of signal output terminals given from said external control unit;

2) reception signal decoding means for receiving and processing of a communication frame including any one of unique address data stored in said reception data storing means, and for storing

a. an address data of the transmission source, an address data specifying transmission destination, and

b. communication data into said reception data storing means as a data set;

3) external output terminal controlling means for, when said reception signal decoding means receives and processes a communication frame, changing signal output state to one or plural of said plurality of signal output terminals corresponding to the address data specifying the transmission destination including the received frame; and

f) second transmitting means, comprising

1) storing means for storing a data set given from said external control unit, said data set including

a. an address data specifying transmission source,

b. a communication data to be transmitted, and an address data specifying the transmission destination of the data;

c. write-controlling means for controlling of writing the data set given from said external control unit into said storing means; and

d. transmission signal composing means for composing communication frame with respect to the data set stored in said storing means; and

g) second receiving means, comprising

1) a self address register for storing a unique address data corresponding to said external control unit;

2) reception signal decoding means for receiving and processing of a communication frame including the unique address data stored in said self address register;

3) storing means for storing

a. an address data of the transmission source,

b. an address data specifying the transmission destination and

c. communication data as a data set included in the communication frame received and processed by said reception signal decoding means; and

4) means for outputting each data of the data set having been stored in said storing means into said external control unit.

2. The communication control apparatus as set forth in claim 1, further comprising

means for transferring data sets from said reception data storing means to said external control unit.

4. The communication control apparatus as set forth in claim 2, further comprising

means for transferring data sets from said reception data storing means to said external control unit.

5. The communication control apparatus as set forth in claim 2, wherein data are previously stored in said transmission data storing means and said reception data storing means from the outside.

6. The communication control apparatus as set forth in claim 2, wherein said transmission data storing means and said reception data storing means are composed of a ROM.

11. The communication control apparatus as set forth in claim 4, wherein data are previously stored in said transmission data storing means and said reception data storing means from the outside.

12. The communication control apparatus as set forth in claim 4, wherein said transmission data storing means and said reception data storing means are composed of a ROM.

14. The communication control apparatus as set forth in claim 5, wherein data are previously stored in said transmission data storing means and said reception data storing means from the outside.

15. The communication control apparatus as set forth in claim 5, wherein said transmission data storing means and said reception data storing means are composed of a ROM.

3. A communication control apparatus, comprising:

a) an external control unit;

b) a plurality of signal input terminals;

c) a plurality of signal output terminals;

d) first transmitting means, comprising

1) transmission data storing means for previously storing data sets each corresponding to said plurality of signal input terminals respectively, said each data set including

a. an address data which specifies each of said signal input terminal,

b. an address data which specifies transmission destination of data to be transmitted previously corresponding to each of said signal input terminal when signal input state to any one of said signal input terminals changes, and a

c. communication data indicating change of signal input state to the corresponding signal input terminal;

2) transmission external input terminal controlling means for, when signal input state to any one of said signal input terminal changes, detecting the change, and for selecting the data set corresponding to the signal input terminal on which change of signal input state is detected from the data sets previously stored in said transmission data storing means; and

3) transmission signal composing means for composing a communication frame with respect to the data set selected by said transmission external input terminal controlling means;

e) first receiving means, comprising

1) reception data storing means for previously storing unique address data corresponding to each of said plurality of signal output terminals;

2) reception signal decoding means for receiving and processing of a communication frame including any one of unique address data stored in said reception data storing means, and for storing

a. an address data of the transmission source, an address data specifying transmission destination, and

b. communication data into said reception data storing means as a data set;

3) external output terminal controlling means for, when said reception signal decoding means receives and processes a communication frame, changing signal output state to one or plural of said plurality of signal output terminals corresponding to the address data specifying the transmission destination including the received frame; and

f) second transmitting means, comprising

1) storing means for storing a data set given from said external control unit, said data set including

a. an address data specifying transmission source,

b. a communication data to be transmitted, and

c. an address data specifying the transmission destination of the data;

2) write-controlling means for controlling of writing the data set given from said external control unit into said storing means; and

3) transmission signal composing means for composing communication frame with respect to the data set stored in said storing means; and

g) second receiving means, comprising

1) a self address register for storing a unique address data corresponding to said external control unit;

2) reception signal decoding means for receiving and processing of a communication frame including the unique address data stored in said self address register;

3) storing means for storing an address data of the transmission source, an address data specifying the transmission destination and communication data as a data set included in the communication frame received and processed by said reception signal decoding means; and

4) means for outputting each data of the data set having been stored in said storing means into said external control unit.

8. The communication control apparatus as set forth in claim 3, wherein data are previously stored in said transmission data storing means and said reception data storing means from the outside.

9. The communication control apparatus as set forth in claim 3, wherein said transmission data storing means and said reception data storing means are composed of a ROM.

7. A communication control apparatus, comprising:

a) an external control unit;

b) a plurality of signal input terminals;

c) a plurality of signal output terminals;

d) transmitting means, comprising

1) transmission data storing means for storing data sets each corresponding to said plurality of signal input terminals respectively given from said external control unit, said each data set including

a. an address data which specifies each of said signal input terminal,

b. an address data which specifies transmission destination of data to be transmitted previously corresponding to each of said signal input terminal when signal input state to any one of said signal input terminals changes, and

c. a communication data indicating change of signal input state to the corresponding signal input terminal;

2) transmission external input terminal controlling means for, when signal input state to any one of said signal input terminal changes, detecting the change, and for selecting the data set corresponding to the signal input terminal on which change of signal input state is detected from the data sets previously stored in said transmission data storing means; and

3) transmission signal composing means for composing a communication frame with respect to the data set selected by said transmission external input terminal controlling means; and

e) receiving means, comprising

1) reception data storing means for storing unique address data corresponding to each of said plurality of signal output terminals given from said external control unit;

2) reception signal decoding means for receiving and processing of a communication frame including any one of unique address data stored in said reception data storing means, and for storing

a. an address data of the transmission source,

b. an address data specifying transmission destination, and

c. communication data into said reception data storing means as a data set;

3) external output terminal controlling means for, when said reception signal decoding means receives and processes a communication frame, changing signal output state to one or plural of said plurality of signal output terminals corresponding to the address data specifying the transmission destination including the received frame.

10. A communication control apparatus, comprising:

a) an external control unit;

b) a plurality of signal input terminals;

c) a plurality of signal output, terminals;

d) transmitting means, comprising

1) transmission data storing means for storing data sets each corresponding to said plurality of signal input terminals respectively given from said external control unit, said each data set including

a. an address data which specifies each of said signal input terminal,

b. an address data which specifies transmission destination of data to be transmitted previously corresponding to each of said signal input terminal when signal input state to any one of said signal input terminals changes, and

c. a communication data indicating change of signal input state to the corresponding signal input terminal;

2) transmission external input terminal controlling means for, when signal input state to any one of said signal input terminal changes, detecting the change, and for selecting the data set corresponding to the signal input terminal on which change of signal input state is detected from the data sets previously stored in said transmission data storing means; and

3) transmission signal composing means for composing a communication frame with respect to the data set selected by said transmission external input terminal controlling means.

13. A communication control apparatus, comprising:

a) an external control unit;

b) a plurality of signal input terminals;

c) a plurality of signal output terminals;

d) receiving means, comprising

1) reception data storing means for storing unique address data corresponding to each of said plurality of signal output terminals given from said external control unit;

2) reception signal decoding means for receiving and processing of a communication frame including any one of unique address data storied in said reception data storing means, and for storing

a. an address data of the transmission source,

b. an address data specifying transmission destination, and

c. communication data into said reception data storing means as a data set;

3) external output terminal controlling means for, when said reception signal decoding means receives and processes a communication frame, changing signal output state to one or plural of said plurality of signal output terminals corresponding to the address data specifying the transmission destination including the received frame; and

e) transmitting means, comprising

1) storing means for storing a data set given from said external control unit, said data set including

a. an address data specifying transmission source,

b. a communication data to be transmitted, and

c. an address data specifying the transmission destination of the data;

2) write-controlling means for controlling of writing the data set given from said external control unit into said storing means; and

3) transmission signal composing means for composing communication frame with respect to the data set stored in said storing means; and

f) receiving means, comprising

1) a self address register for storing a unique address data corresponding to said external control unit;

2) reception signal decoding means for receiving and processing of a communication frame including the unique address data stored in said self address register;

3) storing means for storing

a. an address data of the transmission source,

b. an address data specifying the transmission destination and

c. communication data as a data set included in the communication frame received and processed by said reception signal decoding means; and

4) means for outputting each data of the data set having been stored in said storing means into said external control unit.