Paging receiver with dynamically programmable channel frequencies and functionality

• US 4,849,750 A
• Filed: 10/20/1987
• Issued: 07/18/1989
• Est. Priority Date: 10/20/1987
• Status: Expired due to Term

• Current Assignee: Flatt Morris Associates SA, Management And Investment, S.A.
• Original Assignee: Telefind Corporation
• Inventors: Andros, Andrew A., Campana, Thomas J.
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Pudpud, Eric Oliver
• Application Number:
  US07/110,664
• Time in Patent Office: 637 Days
• Field of Search: 340/825.44, 340/825.03, 340/825.52, 340/825.48, 340/825.49, 375/89, 375/91, 455/227, 455/228, 455/9, 455/10, 455/25, 455/352, 455/32, 455/34, 455/38, 455/154, 455/164, 455/193, 370/91, 370/94, 370/95
• US Class Current: 340/7.25
• CPC Class Codes: G08B 5/22 using electric transmission; using electromagnetic transmission
• CPC Class Codes: G08B 5/224 Paging receivers with visible signalling details
• CPC Class Codes: H04W 8/245 from a network towards a terminal
• CPC Class Codes: H04W 88/022 Selective call receivers
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically programmable to change its functionality including programming of the channels which the paging receiver is to receive. The programmability of the channels permits the paging receiver to be used for making national, regional, remote area, local area, and sublocal area pages, and pages to a group in the local area and to switch from channels which are heavily used during peak paging times to lesser used channels. The paging receiver transmits paging receiver identification code digits in an order of increasing significance which significantly lessens power consumption for all paging receivers tuned to a particular channel for determining if a page is to be received which prolongs paging receiver battery life. The paging receiver displays the place of origin or pages as either being of local origin or from other areas. The paging receiver antenna is continuously tunable to permit compensation for variation in antenna gain caused by environmental factors which can seriously degrade signal strength.

Claims

1. A paging receiver responsive to a plurality of different commands transmitted to the paging receiver by RF transmission with each different command incliding a paging receiver identification code, defining a different function to be performed by the receiver and having a field uniquely identifying the command, the individual 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 the receiver comprising:

(a) a tuner for receiving RF channels which have been programmed to be received by the channel programming command;

(b) a channel memory for storing at least one channel which has been programmed to be received by the tuner by the channel programming command; and

(c) control means, coupled to the tuner and the channel memory, for decoding each command including decoding each channel programming command into a change of at least one channel to be received by the tuner, controlling execution of the function specified by the command to be performed by the paging receiver including causing storage of any RF channel contained in each decoded channel programming command in the channel memory and activating the tuner to receive at least one programmed RF channel stored within the channel memory.

2. A paging receiver 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 receiver in accordance with claim 2 wherein:

the control means sequentially activates the tuner to receive at least one channel stored in the channel memory under control of a control program.

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

the control program sequentially activates the tuner to receive the at least one channel stored in the channel memory in a predetermined order when a carrier of a last channel to be received from one of the stored channels is not detected by the tuner.

5. A RF programmable paging receiver in accordance with claim 4 wherein:

the control means activating the tuner to sequentially receive the at least one stored channel in a predetermined order is repeated cyclically for a predetermined channel sampling time interval when the detection of a carrier of any one of the stored channels is not detected by the tuner.

6. A programmable paging receiver in accordance with claim 2 wherein:

when the tuner does not detect a carrier of a last channel to be received from one of the stored channels, the control means activates the tuner cyclically during a predetermined channel sampling interval to cause the tuner to cyclically receive any stored channels during the predetermined channel sampling interval.

7. A paging receiver in accordance with claim 6 wherein:

(a) the paging receiver is battery powered and further comprising;

(b) a memory for storing a paging receiver identification code which uniquely identifies the paging receiver and wherein,

(c) during each cycle of the tuner receiving any stored channels, the control means activates the tuner to receive any channels for a first predetermined sampling time interval; and

(d) the control means monitors the tuner to determine if the channel carrier is being received during the first predetermined sampling time interval and if the channel carrier is being received for the first predetermined sampling time interval, the control means continues the activation of the tuner to cause the tuner to sequentially receive and decode digits of a transmitted paging receiver identification code transmitted in an order of increasing significance which specify a particular paging receiver to receive the channel programming command and compares the received digits sequentially with corresponding digits of the paging receiver identification code stored in the memory in an order of increasing significance of the digits of the stored paging receiver identification code until a mismatch is found between any received or stored digits at which time the control means causes the tuner to be turned off to stop the tuner from drawing power from the battery or a complete match is found between the stored and received digits at which time digits of a channel programming command are processed by the control means.

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

when the control means detects a complete match between the transmitted digits of the paging receiver identification code and the stored digits of the paging receiver identification code, the control means further decodes the channel programming command to obtain the change in at least one channel to be programmed and stores any decoded channel to be received in the channel memory.

9. A paging receiver in accordance with claim 2 wherein:

(a) the channel memory includes an operation channel section for storing a last received channel of the at least one programmed channel stored in the channel memory; and

(b) the control means stores in the operation channel section of the channel memory the channel of the last channel on which the tuner detected a channel carrier, and upon turning on of the paging receiver, the control means activates the tuner to cause reception of the channel stored in the operating channel section.

10. A paging receiver in accordance with claim 3 wherein:

(a) the channel memory includes an operation channel section for storing a last received channel frequency of the at least one programmed channel frequency stored in the channel memory; and

(b) the control means stores in the operation channel section of the channel memory the channel of the last channel on which the tuner detected a channel carrier, and upon turning on of the paging receiver, the control means activates the tuner to cause reception of the channel stored in the operating channel section.

11. A paging receiver in accordance with claim 4 wherein:

(a) the channel memory includes an operation channel section for storing a last received channel of the at least one programmed channel stored in the channel memory; and

(b) the control means stores in the operation channel section of the channel memory the channel of the last channel on which the tuner detected a channel carrier, and upon turning on of the paging receiver, the control means activates the tuner to cause reception of the channel stored in the operating channel section.

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

(a) the channel memory includes an area channel memory section for storing channels to be sequentially received by the tuner; and

(b) the control means causes channels which are to be programmed to be received by channel programming command to be stored in the area channel memory section of the channel memory and the control means sequentially activates the tuner to receive the stored channels in the predetermined order first from the operating channel section and then sequentially from the area channel section of the channel memory.

13. A paging receiver in accordance with claim 1 wherein the tuner comprises:

(a) a plurality of tuning means each for receiving channels from a different band of frequencies which have been programmed to be received by the channel programming command, only one of the tuning means being activated at any one time to receive a programmed channel and further including;

(b) power controlling means, coupled to the control means and to the plurality of tuning means, for controlling the activation of the plurality of tuning means by the selective applicaiton of power to only the tuning means which is to receive a programmed channel and wherein;

(c) the control means provides the power controlling means with a signal identifying which one of the plurality of tuning means is to be activated.

14. A paging receiver in accordance with claim 12 wherein:

the controll means causes sequential activation of at least one of the individual tuning means to receive channels stored in the channel memory under the control of a control program.

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

the controll program of the control means causes sequential activation of at least one of the plurality of tuning means to receive channels stored in the channel memory in a predetermined order when a carrier from any one of the stored channels is not detected by any one of the tuning means.

16. A paging receiver in accordance with claim 13 wherein:

the control means causes the power controlling means to sequentially activate at least one of the tuning means to receive channel stored in the channel memory.

17. A paging receiver in accordance with claim 16 wherein:

the control means causes sequential activation of the tuning means to receive channels stored in the channel memory in a predetermined order when a carrier from any one of the stored channels is not detected by the tuner.

18. A paging receiver in accordance with claim 2 wherein:

the channel programming command causes a channel to be added to the channel memory.

19. A paging receiver in accordance with claim 18 wherein:

the control means causes the tuner to cyclically scan any channel stored in the channel memory.

20. A paging receiver in accordance with claim 19 wherein:

the channel programming command causes erasure of all channels stored in the channel memory.

21. A paging receiver in accordance with claim 2 wherein:

the channel programming command causes erasure of all channels stored in the channel memory and addition of at least one channel to the channel memory.

22. A paging receiver in accordance with claim 2 wherein:

the channel programming command causes the programming of at least one channel to be received in an area remote from a location identified by an area designation code of a paging receiver identification code stored by the paging receiver.

23. A RF programmabe paging receiver in accordance with claim 21 wherein:

the at least one channel contains a destination code which defines a channel to be used by the paging receiver in the remote area.