Versatile communications controller

• US 5,490,134 A
• Filed: 06/29/1993
• Issued: 02/06/1996
• Est. Priority Date: 06/29/1993
• Status: Expired due to Term

• Current Assignee: Southern California Edison Company (Edison International)
• Original Assignee: Southern California Edison Company (Edison International)
• Inventors: Fitz, Patrick C., Fernandes, Roosevelt A.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): BLUM, RUSSELL
• Application Number:
  US08/084,303
• Time in Patent Office: 952 Days
• Field of Search: 340/825.06, 340/825.08, 340/825.15, 340/825.16, 370/79, 370/85.13, 370/85.8, 370/95.2
• US Class Current: 370/466
• CPC Class Codes: H04L 12/64 Hybrid switching systems
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A communication system uses controllers for bi-directional protocol conversion. There is a plurality of remote signal inputs comprised of supervisory control and data acquisition (SCADA) signals, and/or remote terminal unit (RTU) signals, and/or instrumentation monitoring signals, and/or instrumentation control signals having different protocols. The signals are either in synchronous and asynchronous data formats and include voice inputs. Multiplexing such signal inputs into a composite signal is effected for transmission over electronic and physical communication media using X.25 or higher protocol, at an aggregate transmission data rate of 9.6 Kbps or faster. One or more controller can be configured as the master of remote units. Such units can perform remote signal input emulation; master/remote apparatus emulation, permits user-defined signal port control access; and provides operational diagnostics of the units and their associated communication link.

Claims

1. Apparatus for communicating signals having multiple different protocols as a composite signal with at least one common protocol comprising:

multiple input means for receiving respective input signals in different protocols selected from the multiple protocols, the inputted signals being representative of monitoring signals at a first location,

first controller means for receiving the inputted signals and including means for multiplexing the input signals to a composite signal having a common protocol, and

output means for receiving the composite signal in the common protocol and for transmitting the composite signal in the common protocol through a communication medium to a second location.

2. Apparatus as claimed in claim 1 including at least one second controller means at the second location, input means in the second controller means for receiving the composite signal from the communication medium, means in the second controller means for demultiplexing the composite signal into multiple output signals having the respective multiple different protocols, output means for presenting the outputting signals as monitoring signals, and the first location being a remote station and the second location being a central station.

7. Apparatus as claimed in claim 2 wherein the output signals at the second location represent the monitoring signals in a substantially same manner as the input signals at the first location.

10. Apparatus as claimed in claim 1 wherein the first controller means includes multiple serial inputs and wherein at least some of the inputs selectively have substantially the same protocols with each other.

13. Apparatus as claimed in any one of claims 1, 3 or 5 wherein the first controller means includes means for receiving the multiple protocols selectively in a synchronous or asynchronous data format, and including means for processing such data format into the composite signal having a common protocol.

14. Apparatus as claimed in any one of claims 1, 3 or 5 wherein the controller means includes means for receiving voice signals, and including means for digitizing the voice signal and for multiplexing the digitized voice signal for transmission in the common protocol.

15. Apparatus as claimed in any one of claims 1, 3 or 5 including means for displaying at the second location signals representative of the input signals communication from at least one first location.

16. Apparatus as claimed in any one of claims 2, 4 or 6 including means for displaying at the first location signals representative of signals emanating from the second location.

17. Apparatus as claimed in any one of claims 1, 3 or 5 wherein the common protocol is includes an X.25 protocol and the communication medium is selected to be at least one of an electronic, fiber optic, or satellite medium.

18. Apparatus as claimed in any one of claims 2, 4 or 6 wherein the common protocol is includes an X.25 protocol and the communication medium is selected to be at least one of an electronic, fiber optic, or satellite medium.

19. Apparatus as claimed in claim 1 including sensor means at the first location, the sensor means being integrated into the controller means.

21. Apparatus as claimed in any one of claims 1 to 6 including means for polling the multiple input means receiving the respective input signals in the selected protocol thereby to obtain a polled input signal.

3. Apparatus for communicating signals having multiple different protocols as a composite signal with at least one common protocol comprising:

multiple input means for receiving respective input signals in a protocol of the multiple protocols, the inputted signals being representative of control signals at a first location, at least several of the multiple signals having one of a different protocol from the multiple protocols,

first controller means for receiving the inputted signals and including means for multiplexing the inputted signals to a composite signal having a common protocol, and

output means for receiving the composite signal in the common protocol and for transmitting the composite signal in the common protocol through a communication medium to a second location.

4. Apparatus as claim in claim 3 including at least one second controller means at the second location, input means in the second controller means for receiving the composite signal from the communication medium, means in the second controller means for demultiplexing the composite signal into multiple output signals having the respective multiple different protocols, output means for presenting the outputted signals as control signals, the first location being a control station and the second location being a remote station.

8. Apparatus as claimed in claim 4 wherein the output signals at the second location represent the control signals in a substantially same manner as the input signals at the first location.

11. Apparatus as claimed in claim 3 wherein the first controller means includes multiple serial inputs and wherein at least some of the inputs selectively have substantially the same protocols with each other.

5. Apparatus for communicating signals having multiple different protocols as a composite signal with at least one common protocol comprising:

multiple means for receiving respective input signals in different protocols of the multiple protocols and outputting output signals in a protocol of the multiple protocols, the inputted signals being representative of monitoring signals and the outputted signals being representative of control signals respectively at multiple first locations,

multiple first controller means at respective first locations for receiving the inputted signals and including means for multiplexing the inputted signals to a composite monitoring signal having a common protocol and including means for demultiplexing a composite control signal in the common protocol into multiple signals in the multiple control protocols, and

means for transmitting and receiving the monitoring and control signal in the common protocol through a communication medium to at least one second location.

6. Apparatus as claimed in claim 5 including at least one second controller means at the second location, input means in the second controller means for receiving the composite monitoring signal from the communication medium, means in the second controller means for demultiplexing the composite monitoring signal into multiple output monitoring signals having the respective multiple different protocols, and means for multiplexing multiple control signals in multiple protocols into a composite control signal in a common protocol, the first location being a remote station for transmitting monitoring signals and the second location being a central station for transmitting control signals.

9. Apparatus as claimed in claim 6 wherein the output signals at the second location represent the monitoring signals in a substantially same manner as the input signals at the first location.

12. Apparatus as claimed in claim 5 wherein the first controller means includes multiple serial inputs and wherein at least some of the inputs selectively have substantially the same protocols with each other.

20. Apparatus as claimed in claim 5 including sensor means at a first location, the sensor means being integrated into the first controller means.

22. Apparatus for communicating signals comprising:

multiple input means for receiving respective input signals in different protocols selected from multiple protocols, the inputted signals being representative of monitoring signals at a first location being a remote station,

first controller means for receiving the inputted signals and including means for multiplexing the input signals to a composite signal having a common protocol,

output means for receiving the composite signal in the common protocol and for transmitting the composite signal in the common protocol through a communication medium to a second location being a control station,

at least one second controller means at the second location, input means in the second controller means for receiving the composite signal from the communication medium, means in the second controller means for demultiplexing the composite signal into multiple output signals having the respective multiple different protocols, and

output means for presenting the outputted signals as monitoring signals, such that the outputted signals at the central station are substantially the same as the inputted signals received by the respective multiple input means.

23. Apparatus for communicating signals comprising:

multiple input means for receiving respective input signals in different protocols, the inputted signals being representative of control signals at a first location being a control station,

first controller means for receiving the inputted signals and including means for multiplexing the inputted signals to a composite signal having a common protocol,

output means for receiving the composite signal in the common protocol and for transmitting the composite signal in the common protocol through a communication medium to a second location being a remote station,

at least one second controller means at the second location, input means in the second controller means for receiving the composite signal from the communication medium, means in the second controller means for demultiplexing the composite signal into multiple output signals having the respective multiple different protocols, and

output means for presenting the outputted signals as control signals, such that the outputted signals at the remote station are substantially the same as the inputted signals received by the respective multiple input means.

24. Apparatus for communicating signals comprising:

multiple means for receiving respective input signals in different protocols and outputting output signals in different protocols, the inputted signals being representative of monitoring signals and the outputted signals being representative of control signals respectively at multiple first locations,

multiple first controller means at respective first locations for receiving the inputted signals and including means for multiplexing the inputted signals to a composite monitoring signal having a common protocol and including means for demultiplexing a composite signal in the common protocol into multiple control signals in the multiple protocols,

output means for transmitting and receiving the composite monitoring and control signal in the common protocol through a communication medium to at least one second location,

second controller means at the second location, input means in the second controller means for receiving the composite signal from the communication medium, means in the second controller means for demultiplexing the composite signal into multiple output signals having the respective multiple different protocols, and including means for multiplexing multiple signals in multiple protocols into a composite signal in the common protocol,

output means for presenting the outputted signals at the second location as monitoring signals and control signals at the first location respectively, the first locations being a remote station for transmitting monitoring signals and the second location being a central station for transmitting control signals, and

means for selectively communicating signals representative of voice between selected different first locations independently of the second locations.

25. Apparatus for communicating signals comprising:

multiple means for receiving respective input signals in different protocols and outputting output signals in different protocols, the inputted signals being representative of monitoring signals and the outputted signals being representative of control signals respectively at multiple first locations,

multiple first controller means at respective first locations for receiving the inputted signals and including means for multiplexing the inputted signals to a composite monitoring signal having a common protocol and including means for demultiplexing a composite signal in the common protocol into multiple control signals in the multiple protocols,

output means for transmitting and receiving the composite monitoring and control signal in the common protocol through a communication medium to at least one second location,

second controller means at the second location, input means in the second controller means for receiving the composite signal from the communication medium, means in the second controller means for demultiplexing the composite signal into multiple output signals having the respective multiple different protocols, and including means for multiplexing multiple signals in multiple protocols into a composite signal in the common protocol, and

output means for presenting the outputted signals at the second location as monitoring signals and control signals at the first location respectively, the first locations being a remote station for transmitting monitoring signals and the second location being a central station for transmitting control signal.

26. Apparatus for communicating signals comprising:

multiple means for receiving respective input signals in different protocols and outputting output signals in different protocols, the inputted signals being representative of monitoring signals and the outputted signals being representative of control signals respectively at multiple first locations,

multiple first controller means at respective first locations for receiving the inputted signals and including means for multiplexing the inputted signals to a composite monitoring signal having a common protocol and including means for demultiplexing a composite signal in the common protocol into multiple control signals in the multiple protocols,

output means for transmitting and receiving the composite monitoring and control signal in the common protocol through a communication medium to at least one second location,

second controller means at the second location, input means in the second controller means for receiving the composite signal from the communication medium, means in the second controller means for demultiplexing the composite signal into multiple output signals having the respective multiple different protocols, and including means for multiplexing multiple signals in multiple protocols into a composite signal in the common protocol,

output means for presenting the outputted signals at the second location as monitoring signals and control signals at the first location respectively, the first locations being a remote station for transmitting monitoring signals and the second location being a central station for transmitting control signals, and

means associated with the first controller means for displaying monitored data in an integrated manner to the first locations.

27. A method for communicating signals having multiple different protocols as a composite signal with at least one common protocol comprising:

receiving respective input signals in different protocols selected from the multiple protocols, the inputted signals being representative of monitoring signals at a first location,

receiving in a first controller means the inputted signals and including multiplexing the input signals to a composite signal having a common protocol, and

transmitting the composite signal in the common protocol through a communication medium to a second location.

28. A method as claimed in claim 27 including at least one second controller means at the second location for receiving the composite signal from the communication medium, demultiplexing in the second controller the composite signal into multiple output signals having the respective multiple different protocols, presenting the outputted signals as monitoring signals, and the first location being a remote station and the second location being a central station.

33. A method as claimed in claim 28 wherein the output signals at the second location represent the monitoring signals in a substantially same manner as the input signals at the first location.

39. A method as claimed in any one of claims 27, 29 or 31 wherein the first controller means receives the multiple protocols selectively in a synchronous or asynchronous data format, and including processing such data format into the composite signal having a common protocol.

40. A method as claimed in any one of claims 27, 29, or 31 wherein the controller means receives voice signals, and digitizing the voice signal and multiplexing the digitized voice signal for transmission in the common protocol.

41. A method as claimed in any one of claims 27, 29 or 31 including displaying at the second location signals representative of the input signals communicated from at least one first location.

42. A method as claimed in any one of claims 28, 30 or 32 including displaying at the first location signals representative of signals emanating from the second location.

43. A method as claimed in any one of claims 27, 29 or 31 wherein the common protocol includes an x.25 protocol and the communication medium is selected to be at least one of an electronic, fiber optic, or satellite medium.

44. A method as claimed in any one of claims 28, 30, or 32 wherein the common protocol include an X.25 protocol and the communication medium is selected to be at least one of an electronic, fiber optic, or satellite medium.

45. A method as claimed in any one of claims 27 to 32 including polling the multiple input means receiving the respective input signals in the selected protocol thereby to obtain a polled input signal.

46. A method as claimed in any one of claims 27 to 32 including selecting input signals from the multiple input means receiving the respective input signals in the selected protocol thereby to obtain a selected input signal.

29. A method for communicating signals having multiple different protocols as a composite signal with at least one common protocol comprising:

inputting respective multiple input signals in a protocol selected from the different multiple protocols, the inputted signals being representative of control signals at a first location,

receiving in a first controller means the inputted signals and including multiplexing the inputted signals to a composite signal having a common protocol, and

transmitting the composite signal in the common protocol through a communication medium to a second location.

30. A method as claimed in claim 29 including at least one second controller means at the second location for receiving the composite signal from the communication medium, demultiplexing in the second controller the composite signal into multiple output signals having the respective multiple different protocols, presenting the outputted signals as control signals, the first location being a control station and the second location being a remote station.

34. A method as claimed in claim 30 wherein the output signals at the second location represent the monitoring signals in a substantially same manner as the input signals at the first location.

36. A method as claimed in claim 29 including inputting the signals serially and wherein at least some of the inputs selectively have substantially the same protocols with each other.

31. A method for communicating signals having multiple different protocols as a composite signal with at least one common protocol comprising:

inputting multiple signals in different protocols being representative of monitoring signals at multiple first locations,

outputting multiple signals being representative of control signals at the multiple first locations,

receiving in multiple first controller means at the respective multiple first locations the inputted monitoring signals and including multiplexing the inputted monitoring signals to a composite monitoring signal having a common protocol,

receiving in the multiple first controller means at the respective multiple first locations a composite control signal having a common protocol and demultiplexing the composite signal in the common protocol into multiple control signals in the multiple protocols, and

transmitting the composite monitoring signal in the common protocol through a communication medium to a second location.

32. A method as claimed in claim 31 including at least one second controller means at the second location for receiving the composite monitoring signal from the communication medium and for outputting a composite control signal, demultiplexing in the second controller the composite monitoring signal into multiple output monitoring signals having the respective multiple different protocols, presenting the outputted monitoring signals at the second location, multiplexing in the second controller multiple control signals in different protocols into a composite control signal in a common protocol, the first locations being remote stations for transmitting the composite monitoring signals and for receiving the composite control signal and the second location being a central station for receiving the composite monitoring signal and for transmitting the composite control signal.

35. A method as claimed in claim 32 wherein the output signals at the second location represent the monitoring signals in a substantially same manner as the input signals at the first location.

37. A method as claimed in claim 32 including inputting the signals serially and wherein at least some of the inputs selectively have substantially the same protocols with each other.

38. A method as claimed in claim 31 including inputting the signals serially and wherein at least some of the inputs selectively have substantially the same protocols with each other.