Paging system with dynamically programmable reception frequencies

• US 4,881,073 A
• Filed: 02/22/1988
• Issued: 11/14/1989
• Est. Priority Date: 02/22/1988
• Status: Expired due to Term

• Current Assignee: Flatt Morris Associates SA, Management And Investment, S.A.
• Original Assignee: Telefind Corporation
• Inventors: Campana, Thomas J. Jr., Andros, Andrew A.
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Pudpud, E. O.
• Application Number:
  US07/158,931
• Time in Patent Office: 631 Days
• Field of Search: 340/825.44, 340/825.49, 340/825.02, 340/825.03, 379/220, 379/258, 379/242, 379/56, 379/57, 379/58, 379/59, 379/60, 379/217, 379/170, 358/84, 358/112, 370/93, 370/94, 370/60, 370/61, 370/62, 455/9, 455/10, 455/25, 455/32, 455/34, 455/38, 455/54, 455/164, 455/193, 455/62, 455/154, 455/31, 455/33
• US Class Current: 340/7.41
• CPC Class Codes: G08B 3/1008 Personal calling arrangements or devices, i.e. paging systems selective calling systems and call receivers H04W84/00, H04W68/00
• CPC Class Codes: H04Q 1/457 with conversion of multifrequency signals into digital signals
• CPC Class Codes: H04W 84/022 One-way selective calling networks, e.g. wide area paging
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A paging network is disclosed which utilizes a plurality of distributed switches to transmit pages on a non-real time basis to achieve efficient and low cost transmission. Each of the switches processes packets of pages received from the network. Each of the switches also processes pages into packets of pages to be transmitted to another switch in the network or into batches of pages to be transmitted by a local paging service if the switch is a local switch. The network dynamically programs the reception channel(s) of the paging receivers in response to traffic conditions of a local switch or in accordance with service options specified by a subscriber to a local paging service. The digits of the paging receiver identification code are transmitted in an order of increasing significance to conserve battery life of the paging receivers. Pages may be initiated by placing a local call to any lata switch in the network and service options may be varied by placing of a local call to a lata switch.

Claims

1. A paging system for transmitting a plurality of different commands by RF transmission from a transmitter to a paging receiver, each different command including a paging receiver identification code and each different command defining a different function to be performed by the paging receiver receiving the command and having a field uniquely identifying the command, the different commands including at least one command specifying processing to be performed on pages comprised of characters transmitted with the command and at least one channel programming command specifying a change in RF channel to be received by a paging receiver receiving the channel programming command comprising:

(a) means for generating a signal to initiate the generation of a channel programming command for changing at least one channel of a paging receiver receiving the channel programming command; and

(b) means, responsive to the means for generating a signal, for generating the channel programming command to change at least one channel to be received by the paging receiver to which the channel programming command is addressed.

2. A paging system in accordance with claim 1 wherein:

each channel programming command is transmitted without any characters to be displayed on a display device of the paging receiver.

3. A paging system in accordance with claim 1 wherein:

all commands which are to be received by each individual paging receiver have an identical paging receiver identification code.

4. A paging system in accordance with claim 3 wherein:

the channel programming command causes addition of a channel to be received by the paging receiver in a channel memory to which the channel programming command is addressed.

5. A paging system in accordance with claim 3 wherein:

the channel programming command causes erasure of any channels stored in a channel memory which are currently to be received by the paging receiver and specifies at least one channel to be stored in the channel memory which is to be received by the paging receiver to which the channel programming command is addressed.

6. A paging system in accordance with claim 3 wherein:

the channel programming command causes erasure from a channel memory of any channels currently to be received by the paging receiver to which the channel programming command is addressed.

7. A paging system in accordance with claim 3 wherein:

(a) the paging system is included in a paging network containing a plurality of switching means to which pages are transmitted from a local switching means coupled to the paging system and to the transmitter; and

(b) the channel programming command programs the paging receiver to which the channel programming command is addressed to receive at least one channel used by other transmitters in the paging network for broadcasting pages to the paging receiver to which the channel programming command is addressed.

8. A paging system in accordance with claim 7 wherein:

the channel programming command is comprised of at least one new channel to be received by the paging receiver to which the channel programming command is addressed, a destination code, and a paging receiver identification code with an order of transmission to the paging receiver being the destination code, followed by the paging receiver identification code, followed by the at least one new channel.

9. A paging system in accordance with claim 7 wherein:

(a) the means for generating the signal is a processor which generates the signal in response to reading a memory storing any area destination of where a page is to be broadcast in the network to a paging receiver to which the channel programming command is addressed of a subscriber having a subscriber file stored by the local switching means;

(b) the means for generating the channel programming command is a processor which generates a channel programming command to cause the paging receiver to which the channel programming command is addressed to receive at least one channel in an area destination stored in the memory; and

(c) the network transmits the channel programming command to a switching means located in each of the stored area destinations for broadcast by an associated transmitter.

10. A paging system in accordance with claim 9 further comprising:

(a) a memory storing any channels which may be used by a paging receiver to which the channel programming command is addressed in separate geographical areas contained in the paging network; and

wherein

(b) processor matches the programmed area destination with a corresponding geographical area contained in the memory storing any channels and chooses at least one channel from any channels stored with the matched geographical area.

11. A paging system in accordance with claim 8

(a) the means for generating the signal is a processor which generates the signal in response to reading a memory storing any area destination of where a page is to be broadcast in the network to a paging receiver to which the channel programming command is addressed of a subscriber having a subscriber file stored by the local switching means;

(b) the means for generating the channel programming command is a processor which generates a channel programming command to cause the paging receiver to which the channel programming command is addressed to receive at least one channel in an area destination stored in the memory; and

(c) the network transmits the channel programming command to a switching means located in each of the stored area destinations for broadcast by an associated transmitter.

12. A paging system in accordance with claim 11 wherein:

(a) a memory storing any channels which may be used by a paging receiver to which the channel programming command is addressed in separate geographical areas contained in the paging network; and

wherein

(b) the processor matches the programmed area destination with a corresponding geographical area contained in the memory storing any channels and chooses at least one channel from any channels stored with the matched geographical area.

13. A paging system in accordance with claim 3 wherein:

(a) the means for generating a signal comprises;

(i) first means for sensing that a first channel of the paging system has a volume of pages to be broadcast exceeding a first predetermined volume;

(ii) second means for sensing that a second channel of the paging system may broadcast additional pages without exceeding a second predetermined volume; and

(iii) means, responsive to the first and second means, for sensing that the first channel has a volume of pages to be broadcast exceeding the predetermined volume and that the second channel may broadcast additional pages without exceeding the second predetermined volume; and

(b) the means for generating the channel programming command comprises;

(i) a subscriber file, assigned to each subscriber of the paging system, identifying each individual subscriber of the paging system to receive pages on the first channel; and

(ii) means for generating a channel programming command for at least one subscriber stored in the subscriber files and transmitting the channel programming command to a paging receiver identified by the subscriber file of each of the at least one subscribers.

14. A paging system in accordance with claim 13 wherein:

the means for generating a channel programming command for the at least one subscriber chooses at least one subscriber in accordance with a selection program.

15. A paging system in accordance with claim 14 wherein:

the selection program chooses at least one subscriber to have a channel changed based upon a digit of a subscriber identification number assigned to the subscriber.

16. A paging system in accordance with claim 15 wherein:

the digit is a least significant digit of the subscriber identification code.

17. A paging system in accordance with claim 3 wherein:

the means for generating the channel programming command adds a destination code to each channel programming command to be sent to a paging receiver to which the channel programming command is addressed to receive pages in any area which receives pages from a transmitter other than the transmitter of the paging system with the destination code being used by the paging receiver to which the channel programming command is addressed to control if a tuner of the paging receiver to which the channel programming command is addressed is to turn on to receive a remainder of a page following a destination code transmitted from a transmitter other than the transmitter of the paging system.

18. A paging system in accordance with claim 3 wherein:

the means for generating the channel programming command adds a destination code to each channel programming command to be sent to a paging receiver to which the channel programming command is addressed to receive local service option of the paging system with the destination code being used by the paging receiver to which the channel programming command is addressed to control if a tuner of the paging receiver to which the channel programming command is addressed is to turn on to receive a remainder of a page following a destination code.

19. A paging system in accordance with claim 3 wherein:

the means for generating the channel programming command adds a destination code to each channel programming command to be sent to a paging receiver to which the channel programming command is addressed to receive a group service option of the paging system with the destination code being used by the paging receiver to which the channel programming command is addressed to control if a tuner of the paging receiver is to turn on to receive a remainder of the page.

20. A paging system in accordance with claim 3 wherein:

each channel programming command consists of information used for changing at least one channel.

21. A paging system in accordance with claim 20 wherein:

the channel programming command causes addition of a channel to be received to a channel memory by the paging receiver to which the channel programming command is addressed.

22. A paging system in accordance with claim 20 wherein:

the channel programming command causes erasure of any channels stored in a channel memory which are currently to be received by the paging receiver and specifies at least one channel to be stored in the channel memory which is to be received by the paging receiver to which the channel programming command is addressed.

23. A paging system in accordance with claim 20 wherein:

the channel programming command causes erasure from a channel memory of any channels currently to be received by the paging receiver to which the channel programming command is addressed.

24. A paging system in accordance with claim 3 wherein:

(a) the paging system is included in a paging network containing a plurality of switching means to which pages are transmitted from a local switching means coupled to the paging system and to the transmitter; and

(b) the channel programming command programs the paging receiver to which the channel programming command is addressed to receive at least one channel used by other transmitters in the paging network for broadcasting pages to the paging receiver to which the channel programming command is addressed.

25. A paging network, including a plurality of connected paging system with pages being transmitted between the systems, each paging system including a paging service, a plurality of subscriber files, and a transmitter, each subscriber file identifying a subscriber of the paging service by an identification number, each paging system for transmitting a channel programming command by RF transmission from a transmitter associated with the paging system to a paging receiver identified in the subscriber files of the paging system, each channel programming command including a paging receiver identification code, and specifying a RF channel to be received by a paging receiver receiving the channel programming command when the paging receiver is receiving pages broadcast by another paging system, each paging system comprising:

(a) means for generating a signal to initiate the generation of a channel programming command for specifying at least one channel on which broadcasts from another paging system are to be received by a paging receiver receiving the channel programming command in response to reading a subscriber file containing an identification number identical to the paging receiver identification code identifying the paging receiver to receive the channel programming command; and

(b) means, responsive to the means for generating a signal, for generating the channel programming command to specify the at least one channel to be received by the paging receiver when the paging receiver is located within broadcast range of the another paging system in the network and for transmitting the channel programming command from the transmitter associated with the paging system to the paging receiver prior to moving of the paging receiver into the broadcast range of the another paging receiver.

26. A paging network in accordance with claim 25 wherein:

pages to be displayed on a display device are each transmitted to the paging receiver with a command and all commands to be received by the paging receiver include an identical paging receiver identification code.

27. A paging system in accordance with claim 25 wherein:

pages to be displayed on a display device are each transmitted to the paging receiver with a command and all commands to be received by the aging receiver include an identical paging receiver identification code.

28. A paging system including a paging service which broadcasts pages on at least two channels, a transmitter for transmitting a channel programming command to a paging receiver including a paging receiver identification code and specifying a change in RF channel to be received by the paging receiver receiving the channel programming command from one of the channels of the paging service to another of the channels of the paging service comprising:

(a) means for generating a signal to initiate the generation of a channel programming command for changing the paging receiver from receiving the one channel to another of the channels in response to paging traffic on the at least two channels used for broadcasting pages by the paging service permitting additional pages to be broadcast on the another of the channels; and

(b) means, responsive to the means for generating a signal, for generating the channel programming command to change the paging receiver to which the channel programming command is addressed from receiving the one channel to receive the another of the channels and for causing transmission of the channel programming command by the transmitter of the paging service to the paging receiver.

29. A paging system in accordance with claim 28 wherein:

pages to be displayed on a display device are each transmitted to the paging receiver with a command and all commands to be received by the paging receiver include an identical paging receiver identification code.

30. A paging system including a paging service, a plurality of subscriber files, each subscriber file identifying a subscriber of the paging service by an identification number and a transmitter for transmitting pages on at least one radio common carrier channel, and at least one additional paging means which transmits pages to subscribers of the paging means on at least one non-radio common carrier channel, the paging service transmitting a channel programming command by RF transmission from the transmitter to a paging receiver, including a paging receiver identification code, and specifying a change in RF channel to be received by a paging receiver receiving the channel programming command comprising:

(a) means for generating a signal to initiate the generation of a channel programming command for changing at least one channel of a paging receiver the channel programming command in response to a communication containing an identification number of a subscriber identified within the subscriber files; and

(b) means, responsive to the means for generating a signal, for generating the channel programming command to cause the paging receiver to which the channel programming command is addressed to receive pages on the at least one radio common carrier and causing the transmitter to transmit the channel programming command to the paging receiver.