Method and apparatus for on-the-fly mode change in a paging transmitter

• US 5,995,850 A
• Filed: 04/02/1997
• Issued: 11/30/1999
• Est. Priority Date: 04/02/1997
• Status: Expired due to Term

• Current Assignee: Quarterhill Inc. (f/k/a Wi-LAN Inc.)
• Original Assignee: Glenayre Electronics Incorporated (EDCI Holdings Incorporated)
• Inventors: Drewry, Kyle Jackson, Goud, Paul Andrew, Filer, Roderick David Earle, Chan, Tony Lung
• Primary Examiner(s): Urban, Edward F.
• Assistant Examiner(s): Nguyen, Thuan T.
• Application Number:
  US08/825,728
• Time in Patent Office: 972 Days
• Field of Search: 455/31.2, 455/503, 455/502, 455/38.1, 455/458, 455/426, 455/443, 455/45, 455/560
• US Class Current: 455/560
• CPC Class Codes: H04W 88/185 Selective call encoders for paging networks, e.g. paging centre devices

Abstract

A method and apparatus for on-the-fly mode change in a paging system (201) is provided. A transmitter controller (301) in a base station (207) receives paging information. From the paging information, the transmitter controller (301) is capable of identifying a plurality of paging protocols associated with the paging information. Each identified paging protocol is associated with a corresponding mode. Mode information (D₃, D₄) corresponding to each mode is provided to an exciter (303). Based upon the mode information, the exciter (303) modulates a frequency using predetermined values of frequency deviation and frequency offset associated with the mode. The exciter (303) produces a modulated signal that transitions from one mode to another without delay.

Claims

1. A method for transmitting paging data formatted in a plurality of paging protocols from a base station in a paging system, the base station having a transmitter controller and an exciter, the method comprising the steps of:

assigning a first mode setting to a first paging protocol;

assigning a second mode setting to a second paging protocol;

transmitting data information recording to said first paging protocol and said second paging protocol from the transmitter controller to the exciter;

transmitting mode information according to said first paging protocol and said second paging protocol from the transmitter controller to the exciter; and

transitioning between the transmission of the paging data according to said first paging protocol and the transmission of the paging data according to said second paging protocol without delay;

wherein said assigning a first mode setting step comprises the step of using a predetermined value of frequency offset for said first mode setting and said assigning a second mode setting step comprises the step of using a predetermined value of frequency offset for said second mode setting.

2. A method as claimed in claim 1 wherein said assigning a first mode setting step comprises the step of using a predetermined value of frequency deviation for said first mode setting and said assigning a second mode setting step comprises the step of using a predetermined value of frequency deviation for said second mode setting.

3. A method as claimed in claim 2 wherein said assigning a first mode setting step comprises the step of using a predetermined value of frequency offset for said first mode setting and said assigning a second mode setting step comprises the step of using a predetermined value of frequency offset for said second mode setting.

4. A method as claimed in claim 1 wherein said transmitting data information step includes the step of changing from data information according to said first paging protocol to said second paging protocol at a data transition time and said transmitting mode information step includes the step of changing from mode information according to said first paging protocol to said second paging protocol at a mode transition time, the method further comprising the step of synchronizing said data transition time with said mode transition time.

5. A method as claimed in claim 1 further comprising the steps of:

synchronizing the transmission of said data information according to said first paging protocol with said mode information according to said first paging protocol; and

synchronizing the transmission of said data information according to said second paging protocol with said mode information according to said second paging protocol.

6. A method as claimed in claim 1 wherein said first paging protocol is FLEX™

.

7. A method as claimed in claim 1 wherein said first paging protocol is POCSAG™

.

8. A method as claimed in claim 1 wherein said first paging protocol is ERMES™

.

9. A method as claimed in claim 1 further comprising the steps of:

assigning a third mode setting to a third paging protocol, said third paging protocol different from both said first paging protocol and said second paging protocol; and

transmitting said paging data according to said third paging protocol from the base station on said frequency.

10. A method as claimed in claim 1 further comprising the steps of:

assigning a fourth mode setting to a fourth paging protocol, said fourth paging protocol different from said first paging protocol, said second paging protocol, and said third paging protocol; and

transmitting said paging data according to said fourth paging protocol from the base station on said frequency.

11. A method as claimed in claim 1 wherein said first paging protocol is REFLEX™

.

12. A method as claimed in claim 1 further comprising the step of synchronizing said data information according to said first paging protocol with said mode information according to said first paging protocol.

13. A method as claimed in claim 12 further comprising the step of synchronizing said data information according to said second paging protocol with said mode information according to said second paging protocol.

14. A base station in a paging system for transmitting pages according to a plurality of paging protocols comprising:

a transmitter controller configured to process paging information, identify therefrom the plurality of paging protocols, and produce and transmit data information and mode information corresponding to each identified paging protocol;

an exciter, coupled to said transmitter controller, configured to receive said data information and said mode information, said data information and said mode information used to modulate a signal corresponding to a channel and produce a modulated signal according to said each identified paging protocol, said modulated signal transitioning from one of said each identified paging protocol to another without delay;

wherein said mode information corresponds to a predetermined mode setting, said mode setting including a frequency deviation for said each identified paging protocol.

17. A base station as claimed in claim 14 wherein said transmitter controller is configured to synchronize a data transition with a mode transition, said data transition occurring during a change from data information according to a first of said each identified paging protocol to a second of said each identified paging protocol, said mode transition occurring during a change from mode information according to said first of said each identified paging protocol to said second of said each identified paging protocol.

18. A base station as claimed in claim 14 wherein said transmitter controller is configured to synchronize the transmission of both said data information and said mode information corresponding to said each identified paging protocol.

19. A base station as claimed in claim 14 wherein said each identified paging protocol includes FLEX™

.

20. A base station as claimed in claim 14 wherein said each identified paging protocol includes ERMES™

.

21. A base station as claimed in claim 14 wherein said each identified paging protocol includes POCSAG™

.

22. A base station as claimed in claim 14 wherein the plurality of paging protocols numbers is three paging protocols, said each identified paging protocol having a unique corresponding mode setting.

23. A base station as claimed in claim 14 wherein the plurality of paging protocols is four paging protocols, said each identified paging protocol having a unique corresponding mode setting.

24. A base station as claimed in claim 14 wherein said each identified paging protocol includes GOLAY™

.

25. A base station as claimed in claim 14 wherein said each identified paging protocol includes REFLEX™

.

26. A base station as claimed in claim 14 wherein said exciter and said transmitter controller are integrated.

27. A base station as claimed in claim 14 wherein said exciter is configured to synchronize said data information with said mode information corresponding to said each identified paging protocol.

15. A base station as claimed in claim 15 wherein said mode information corresponds to a predetermined mode setting, said mode setting including a frequency offset for said each identified paging protocol.

16. A base station as claimed in claim 15 wherein said mode setting includes a frequency deviation for said each identified paging protocol.

28. A method for transmitting paging data formatted in a plurality of paging protocols from a base station in a paging system, the base station having a transmitter controller and an exciter, the method comprising the steps of:

assigning a first mode setting to a first paging protocol;

assigning a second mode setting to a second paging protocol;

transmitting data information according to said first paging protocol and said second paging protocol from the transmitter controller to the exciter;

transmitting mode information according to said first paging protocol and said second paging protocol from the transmitter controller to the exciter; and

transitioning between the transmission of the paging data according to said first paging protocol and the transmission of the paging data according to said second paging protocol without delay;

wherein said assigning a first mode setting step comprises the step of using a predetermined value of frequency deviation for said first mode setting and said assigning a second mode setting step comprises the step of using a predetermined value of frequency deviation for said second mode.

29. A method as claimed in claim 28 wherein said assigning a first mode setting step comprises the step of using a predetermined value of frequency offset for said first mode setting and said assigning a second mode setting step comprises the step of using a predetermined value of frequency offset for said second mode setting.

30. A method is claimed in claim 28 wherein said transmitting data information step includes the step of changing from data information according to said first paging protocol to said second paging protocol at a data transition time and said transmitting mode information step includes the step of changing from mode information according to said first paging protocol to said second paging protocol at a mode transition time, the method further comprising the step of synchronizing said data transition time with said mode transition time.

31. A method as claimed in claim 28 further comprising the steps of:

synchronizing the transmission of said data information according to said first paging protocol with said mode information according to said first paging protocol; and

synchronizing the transmission of said data information according to said second paging protocol with said mode information according to said second paging protocol.