Individual simulcast station control decoder

• US 4,772,887 A
• Filed: 08/05/1983
• Issued: 09/20/1988
• Est. Priority Date: 08/05/1983
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Erickson, Gary D., Reynolds, Gary R., Dunkerton, Stephen H., Chapman, Scott G.
• Primary Examiner(s): Weldon, Ulysses
• Application Number:
  US06/520,779
• Time in Patent Office: 1,873 Days
• Field of Search: 340/825.44, 340/825.47, 340/825.48, 340/825.07, 455/92, 455/95, 455/15, 455/58, 455/68, 179/18 BF, 371/46, 371/45, 370/111
• US Class Current: 340/7.26
• CPC Class Codes: H04W 88/027 using frequency address codes

Abstract

A paging simulcast station remote control system decoder. The paging system decoder responds to signals generated in accordance with a predetermined signalling scheme comprising a series of tones and timed pauses. The decoder is also responsive to user programmable switches which provide station function tone and sector information. The paging system decoder then selectively deactivates a paging simulcast transmitter in response to signals received through a conventional paging communication link.

Claims

1. A paging simulcast transmitter remote control decoder for receiving signals from a paging simulcast transmitter remote control encoder for selectively activating or deactiviatng a simulcast transmitter, the signals including a plurality of transmitter control tones comprising individual transmitter control information followed by encoded paging information, and for selectively applying an analog or binary paging signal sequence to said simulcast transmitter in response to the encoded paging information generated by said encoder, said decoder comprising:

(a) means for receiving signals generated by the paging simulcast remote control encoder;

(b) means for detecting the presence of a first transmitter control tone indicating that a paging sequence is initiated;

(c) means responsive to detection of said first transmitter control tone for detecting the presence of a second transmitter control tone indicating that selected paging simulcast transmitter should inhibit transmitting subsequent paging information;

(d) means responsive to detection of said second transmitter control tone for selectively deactivating said selected paging simulcast transmitter;

(e) means for detecting the presence of a third transmitter control tone indicating the beginning of encoded paging information; and

(f) means responsive to detection of said third transmitter control tone for selectively activating an analog or binary transmission mode in said decoder.

2. The apparatus of claim 1 wherein said second transmitter control tone detecting means includes a microprocessor.

3. The apparatus of claim 1 wherein said receiving means comprises a radio-frequency receiver.

4. A method for decoding paging simulcast transmitter remote control signals from a paging simulcast transmitter remote control encoder for selectively activating or deactivating a selected simulcast transmitter, and for selectively applying an analog or binary paging information signal to said simulcast transmitter in response to the remote control signals generated by said encoder, said method comprising the steps of:

(a) receiving the remote control signals generated by the paging simulcast remote control encoder, wherein the remote control signals include a first transmitter control tone, a second transmitter control tone, and a third transmitter control tone followed by the analog or binary paging information signal;

(b) detecting the presence of the first transmitter control tone indicating that a paging sequence is initiated;

(c) detecting the presence of the second transmitter control tone indicating that said selected simulcast transmitter should inhibit transmitting the subsequent analog or binary paging information signal;

(d) selectively deactivating said selected simulcast transmitter in response to detection of said second transmitter control tone;

(e) detecting the presence of the third transmitter control tone indicating the beginning of the analog or binary paging information signal; and

(f) selectively activating in the decoder either an analog or binary transmission mode in order to transmit the analog or binary paging information signal respectively to said selected simulcast transmitter in response to detection of said third transmitter control tone.

5. The method of claim 4, further including the steps of:

(g) enabling the binary transmission mode in response to the binary paging information signal; and

(h) enabling the analog transmission mode in response to the analog paging information signal.

6. A decoder for controlling a paging system transmitter in a plural population of selectively enabled transmitters, each transmitter associated with a decoder for directing the transmission of paging information comprising analog information signals and binary information signals, said decoder comprising:

means responsive to receive and decode coded information, wherein the coded information includes control information signals followed by paging information signals, and further wherein said control information signals direct said decoder to control a corresponding transmitter in the plural population of selectively enabled transmitters;

means responsive to the detection and decoding of the coded information for directing said decoder to disable the coresponding transmitter while leaving at least one enabled transmitter;

means responsive to the enabled transmitter for directing said decoder to establish a path to the enabled transmitter for the transmission of the paging information; and

means responsive to the absence of the coded information for deactivating the enabled transmitter to terminate the transmission of paging information.

7. The decoder of claim 6, wherein said means responsive to the enabled transmitter selectively enables a binary signal path to the enabled transmitter or transmitting binary information in response to detecting a received binary information signal.

8. The decoder of claim 7, wherein said means responsive to the enabled transmitter selectively enables an analog signal path to the enabled transmitter for transmitting an analog information signal in response to detecting and receiving an analog information signal.

9. The decoder of claim 6, wherein the control information signals include a sequential series of transmitter control signals for directing the enabling of a selected transmitter.

10. The decoder of claim 9, wherein the series of transmitter control signals includes a first control signal for initially activating the plural population of transmitters.

11. The decoder of claim 10, wherein the series of transmitted control signals includes a group of second control signals, each second control signal of the group associated with a corresponding transmitter for selectively disabling the corresponding transmitter.

12. The decoder of claim 11, wherein the series of control signals includes a third control signal for enabling each initially activated transmitter not disabled by said second control signal.

13. The decoder of claim 12, wherein the series of control signals includes an absence of coded information for a predetermined period to deactviate each transmitter in the plural population of selectively enabled transmitters.

14. The decoder of claim 13, wherein said transmitter control signals are comprised of transmitter control tones.

15. A method of decoding encoded information for providing information to a transmitter in a plural population of selectively enabled transmitters, each transmitter associated with a series of transmitter control information and furher wherein the encoded information includes the transmitter control information and paging information, wherein the paging information comprises analog paging information and binary paging information, said method comprising the steps of:

(a) detecting and decoding the received encoded information for providing the transmitter control information and paging information;

(b) selectively enabling the transmitter correlating to the received transmitter control information;

(c) establishing a signal path to the enabled transmitter corresponding to the received paging information signal;

(d) transmitting the paging information to a plurality of communication receivers; and

(e) disabling transmission of information from the enabled transmitter in response to the absence for a predetermined period of time of encoded information.

16. The method of claim 15, wherein step (b) of selectively enabling further includes the steps of:

(f) detecting a first control signal included in the transmitter control information to initially activate each transmitter in the plural poopulation of transmitters;

(g) detecting a second control signal for disabling a transmitter correlating to the second control signal; and

(h) detecting a third control signal for enabling each transmitter not previously disabled by the second control signal.

17. The method of claim 16, wherein step (c) of establishing further includes the steps of:

(i) establishing a binary signal path in response to detecting binary information; and

(j) establishing an analog signal path in response to detecting analog information.

18. The method of claim 15, wherein the plurality of transmitters includes a plurality of link transmitters being distributed in the path of the encoded information, and wherein step (a) of detecting further includes the steps of:

(k) relaying the encoded information through the link transmitters distributed in the path of the encoded information; and

(l) waiting a predetermined period of time corresponding to the number of link transmitters distributed in the path before initiating detection of the transmitter control information.