Commercial communication system

• US 20050128073A1
• Filed: 10/25/2004
• Published: 06/16/2005
• Est. Priority Date: 07/15/1998
• Status: Abandoned Application

• Current Assignee: Northfield Telecommunications, Inc.
• Original Assignee: Northfield Telecommunications, Inc.
• Inventors: Blakeley, Peter, Coons, Kenneth J., Coons, Benton S.
• Application Number:
  US10/973,809
• Publication Number:
  US 20050128073A1
• Time in Patent Office: Days
• US Class Current: 340/539.100
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

The disclosure relates to a commercial communications system for detecting an event, and communicating the detection of the event to a controller.

Claims

1. A device for transmitting a signal indicating an occurrence of an event to a remotely located receiver, the device comprising:

an event detector;

a microprocessor in data communication with the event detector;

a memory device coupled to the microprocessor; and

a first transmitter coupled to the microprocessor;

wherein, the memory device stores a set of instructions that cause the microprocessor to cooperate with the event detector, the first transmitter, and the memory device to carry out the following acts

monitoring the event detector for an indication of an occurrence of an event;

incrementing a count variable if an occurrence of an event is indicated by the event indicator; and

transmitting the count variable to the remotely located receiver, when a clock value exceeds a threshold.

2. The device of claim 1, wherein the memory stores a set of instructions that causes the microprocessor to cooperate with the event detector, the first transmitter, and the memory device to carry out the following additional acts:

resetting the clock value after transmission of the count variable; and

resetting the count variable after its transmission.

3. The device of claim 1, wherein the count variable is transmitted within a message frame.

4. The device of claim 3, wherein the message frame includes a value identifying the device transmitting the count variable.

5. The device of claim 4, wherein the message frame includes a value identifying a system of which the device transmitting the count variable is a component.

6. The device of claim 3, wherein the act of transmitting the count variable comprises transmitting a plurality of message frame.

7. The device of claim 6, wherein random durations of time separate each of the plurality of message frames.

8. The device of claim 1, wherein the event detector comprises a presence sensor.

9. The device of claim 8, wherein the presence sensor comprises a phototransmitter and a photoreceiver.

10. The device of claim 1, wherein the memory stores a set of instructions that causes the microprocessor to cooperate with the event detector, the first transmitter, and the memory device to carry out the following additional acts:

divide the count value by a denominator.

11. The device of claim 10, wherein the denominator is two.

12. The device of claim 1, further comprising a first transmitter coupled to the microprocessor, and wherein the memory stores a set of instructions that causes the microprocessor to cooperate with the event detector, the first transmitter, and the memory device to carry out the following additional acts:

transmit a signal to a second remote receiver unit with each occurrence of an event.

13. The device of claim 12, wherein the second remote receiver unit comprises a chiming apparatus.

14. A method of transmitting a signal indicating an occurrence of an event to a remotely located receiver, the method comprising:

monitoring an event detector for an indication of an occurrence of an event;

incrementing a count variable if an occurrence of an event is indicated by the event indicator; and

transmitting the count variable to the remotely located receiver, when a clock value exceeds a threshold.

15. The method of claim 14, further comprising:

resetting the clock value after transmission of the count variable; and

resetting the count variable after its transmission.

16. The method of claim 14, wherein the count variable is transmitted within a message frame.

17. The method of claim 16, wherein the message frame includes a value identifying the device transmitting the count variable.

18. The method of claim 17, wherein the message frame includes a value identifying a system of which the device transmitting the count variable is a component.

19. The method of claim 16, wherein the act of transmitting the count variable comprises transmitting a plurality of message frames.

20. The method of claim 19, wherein random durations of time separate each of the plurality of message frames.

21. The method of claim 14, further comprising:

dividing the count value by a denominator.

22. The method of claim 21, wherein the denominator is two.

23. A remote terminal unit for transmitting a signal indicating an occurrence of an event to a remotely located receiver, the unit comprising:

a microprocessor coupled a parallel input/output (I/O) port and to a serial I/O port;

a memory unit coupled to the microprocessor; and

a transmitter in data communication with the microprocessor;

wherein the memory device stores a set of instructions that cause the microprocessor to cooperate with the transmitter, the serial I/O port, the parallel I/O port, and the memory device to carry out the following acts

monitor the parallel and serial I/O ports;

create a message frame in response to a pin within the parallel I/O port changing state;

create a message frame in response to a data message received via the serial I/O port;

communicate the message frame to the transmitter for transmission to the remotely located receiver;

wherein the message frame includes a value identifying a device coupled to the pin that changed state within the parallel I/O port or identifying an alarm condition associated with a computer coupled to the serial I/O port.

24. The remote terminal unit of claim 23, wherein the memory device stores a set of instructions that cause the microprocessor to cooperate with the transmitter, the serial I/O port, the parallel I/O port, and the memory device to further carry out the following acts

reading from a memory address in response to a data message received via the serial I/O port commanding such an action;

and

writing to a memory address in response to a data message received via the serial I/O port commanding such an action.

25. The remote terminal unit of claim 23, wherein the message frame further includes a value identifying a system of which the remote transmitting unit is a component.

26. A wireless communication system comprising:

the remote terminal unit of claim 23;

and

a plurality of devices, each of which generates a signal on an output line, the signal indicating occurrence of an event, the output line of each device being coupled to one of a plurality of pins within the parallel I/O port within the remote terminal unit.

27. The wireless communication system of claim 26, wherein the at least one of the plurality of devices comprises a presence detector.

28. The wireless communication system of claim 26, wherein the at least one of the plurality of devices comprises a call box.

29. The wireless communication system of claim 26, wherein the at least one of the plurality of devices comprises a flame detector.

30. The wireless communication system of claim 26, wherein the at least one of the plurality of devices comprises a smoke detector.

31. The remote terminal unit of claim 23, wherein the memory device stores a set of instructions that cause the microprocessor to cooperate with the transmitter, the serial I/O port, the parallel I/O port, and the memory device to further carry out the following acts associating a first voltage on a first pin in the parallel I/O port with an alarm state;

and

associating a second voltage on the first pin in the parallel I/O port with a clear state.

32. The remote terminal unit of claim 31, wherein the memory device stores a set of instructions that cause the microprocessor to cooperate with the transmitter, the serial I/O port, the parallel I/O port, and the memory device to further carry out the following acts

create a plurality of message frames in response to the first pin in the parallel I/O port transitioning to a clear state;

and

communicate the plurality of message frames to the transmitter for transmission to the remotely located receiver.

33. The remote terminal unit of claim 32, wherein each of the plurality of message frames includes a value identifying a device coupled to one of a plurality of pins in the parallel I/O port.

34. A method of transmitting a signal indicating an occurrence of an event to a remotely located receiver, the method comprising:

monitoring parallel and serial I/O ports;

creating a first message frame in response to a pin within the parallel I/O port changing state;

creating a second message frame in response to a data message received via the serial I/O port;

communicating the message frame to a transmitter for transmission to the remotely located receiver;

wherein the first message frame includes a value identifying a device coupled to the pin that changed state within the parallel I/O port.

35. The method of claim 34, wherein:

the second message frame includes a value identifying an alarm condition associated with a computer coupled to the serial I/O port.

36. The method of claim 34, further comprising:

reading from a memory address in response to a data message received via the serial I/O port commanding such an action; and

writing to a memory address in response to a data message received via the serial I/O port commanding such an action.

37. The remote terminal unit of claim 36, wherein the first and second message frames further include a value identifying a system of which the remote transmitting unit is a component.

38. The method of claim 34, further comprising:

associating a first voltage on a first pin in the parallel I/O port with an alarm state; and

associating a second voltage on the first pin in the parallel I/O port with a clear state.

39. The method of claim 38, further comprising:

creating a plurality of message frames in response to the first pin in the parallel I/O port transitioning to a clear state; and

communicating the plurality of message frames to the transmitter for transmission to the remotely located receiver.

40. The method of claim 39, wherein each of the plurality of message frames includes a value identifying a device coupled to one of a plurality of pins in the parallel I/O port.

41. A data concentrator comprising:

a microprocessor in data communication with a plurality of latches;

a memory device coupled to the microprocessor;

a serial I/O port in data communication with the microprocessor;

wherein the memory device stores a set of instructions that cause the microprocessor to cooperate with the latches, the serial I/O port, and the memory device to carry out the following acts detecting a change of state on one of the pins within one of the plurality of latches;

entering a data message into a buffer, the data message including a value identifying a device coupled to the pin on which the change of state was detected;

communicating the data message via the serial I/O port.

42. A wireless communication system comprising:

the data concentrator of claim 41;

and

a remote terminal unit having a serial port and a transmitter;

wherein the serial I/O port of the data concentrator is in data communication with the serial I/O port of the remote terminal unit.

43. The wireless communication system of claim 42, further comprising a remotely located receiver.

44. The data concentrator of claim 41, wherein the memory unit includes an address range that stores a value indicating a span of time having elapsed since one of the pins within one of the plurality of latches last changed its state.

45. The data concentrator of claim 41, wherein the state of one of the pins within one of the plurality of latches is selected from the group consisting of logic high, logic low, and square wave.

46. The data concentrator of claim 45, wherein the act of detecting a change of state on one of the pins within one of the plurality of latches comprises determining that the one pin exhibits a particular state for a duration of at least one-and-a-half cycles of the square wave.