Paging for non-real-time communications using cellular networks

• US 8,326,331 B2
• Filed: 11/07/2011
• Issued: 12/04/2012
• Est. Priority Date: 01/31/2005
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Jasper Wireless, Inc. (Cisco Systems, Inc.)
• Inventors: Mohammed, Jahangir
• Primary Examiner(s): Appiah, Charles
• Assistant Examiner(s): Holliday, Jaime
• Application Number:
  US13/290,862
• Publication Number:
  US 20120052853A1
• Time in Patent Office: 393 Days
• Field of Search: 455/458, 455/574
• US Class Current: 455/458
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of paging to increase standby time of Wireless Terminals used for non-real-time communications via cellular network is disclosed. The method comprises synchronizing a wireless terminal clock to a server internal clock and deriving a paging window and a dormant window for communicating between the server and the wireless terminal using the synchronized time. The method further comprises during the paging window: finding a control channel for a cellular network by the wireless terminal; sending the page from the server to the wireless terminal; and receiving the page from the server at the wireless terminal.

Claims

1. A method of paging for wireless networks comprising:

synchronizing a paging window clock of a server to a paging window clock of a wireless terminal operating in the wireless network;

transmitting at least one parameter to the wireless terminal to derive a paging window and a dormant window for communicating between the server and the wireless terminal based at least in part on the paging window clock of the server, wherein the paging window and the dormant window are separate from a paging interval used between a base station and the wireless terminal, wherein a duration of the paging window is greater than a duration of the paging interval used between the base station and the wireless terminal, and wherein a duration of the dormant window is greater than the duration of the paging interval used between the base station and the wireless terminal;

transmitting a page from the server to the wireless terminal during the paging window in the event that the server is indicated to transmit the page to the wireless terminal to wake-up circuitry of the wireless terminal to receive and respond to the page in the event that the page is transmitted to the wireless terminal in a paging period during the paging window, wherein during the dormant window the circuitry of the wireless terminal sleeps even during times that correspond to paging slots for the wireless terminal between the base station and the wireless terminal, and wherein the paging window has a duration at least as long as a duration from a start of a first paging slot to an end of a second paging slot between the wireless terminal and the server such that the paging window overlaps at least one paging slot between the wireless terminal and the base station.

2. A method as recited in claim 1, wherein synchronizing the paging window clock of the wireless terminal to the paging window clock of the server comprises the server sending a synchronizing signal to the wireless terminal.

3. A method as recited in claim 1, wherein synchronizing the paging window clock of the wireless terminal to the paging window clock of the server comprises synchronizing the clock of the server to an external time reference and synchronizing the clock of the wireless terminal to the external time reference.

4. A method as recited in claim 1, wherein synchronizing the paging window clock of the wireless terminal to the paging window clock of the server comprises synchronizing the paging window clock of the server to an external time reference and synchronizing the paging window clock of the wireless terminal to the external time reference wherein the external time reference comprises a GPS time reference.

5. A method as recited in claim 1, wherein synchronizing the paging window clock of the wireless terminal to the paging window clock of the server comprises synchronizing the paging window clock of the server to an external time reference and synchronizing the paging window clock of the wireless terminal to the external time reference wherein the external time reference comprises Internet time via NTP protocol.

6. A method as recited in claim 1, wherein the transmitted page from the server is based on the GSM/GPRS paging method.

7. A method as recited in claim 1, wherein the transmitted page from the server is based on the CDMA paging method.

8. A method as recited in claim 1, wherein the transmitted page from the server is based on the WCDMA paging method.

9. A method as recited in claim 1, wherein the at least one parameter is a Tier-1 Period (T1P).

10. A method as recited in claim 9, wherein the at least one parameter is a Tier-2 Period (T2P).

11. A method as recited in claim 10, wherein the Tier-1 Period (T1P) and the Tier-2 Period (T2P) determine the length of the dormant window and the length of the paging window.

12. A method as recited in claim 1, wherein during the dormant window the wireless terminal conserves power by one or more of the following:

shutting down part the wireless terminal'"'"'s circuitry, running circuitry to maintain the internal wireless terminal window clock, and running circuitry to respond to an interrupt.

13. A system for paging for wireless networks comprising:

a time reference;

a server comprising;

an internal server paging window clock;

a processor for synchronizing the internal server paging window clock with the time reference and transmitting at least one parameter to a wireless terminal to derive a paging window and a dormant window for communicating between the server and the wireless terminal based at least in part on the internal server paging window clock, wherein the paging window and the dormant window are separate from a paging interval used between a base station and the wireless terminal, wherein a duration of the paging window is greater than a duration of the paging interval used between the base station and the wireless terminal, and wherein a duration of the dormant window is greater than the duration of the paging interval used between the base station and the wireless terminal, wherein the processor transmits a page from the server to the wireless terminal during the paging window in the event that the server is indicated to transmit the page to the wireless terminal to wake-up circuitry of the wireless terminal to receive and respond to the page in the event that the page is transmitted to the wireless terminal in a paging period during the paging window, wherein during the dormant window the circuitry of the wireless terminal sleeps even during times that correspond to paging slots for the wireless terminal between the base station and the wireless terminal, and wherein the paging window has a duration at least as long as a duration from a start of a first paging slot to an end of a second paging slot between the wireless terminal and the server such that the paging window overlaps at least one paging slot between the wireless terminal and the base station.

14. A system as recited in claim 13, wherein the at least one parameter is a Tier-1 Period (T1P).

15. A system as recited in claim 14, wherein the at least one parameter is a Tier-2 Period (T2P).

16. A system as recited in claim 15, wherein the Tier-1 Period (T1P) and the Tier-2 Period (T2P) determine the length of the dormant window and the length of the paging window.

17. A system as recited in claim 13, wherein the time reference comprises a GPS time reference.

18. A system as recited in claim 13, wherein during the dormant window the wireless terminal conserves power by one or more of the following:

shutting down part the wireless terminal'"'"'s circuitry, running circuitry to maintain the internal wireless terminal window clock, and running circuitry to respond to an interrupt.

19. A system as recited in claim 13, wherein synchronizing the internal wireless terminal window clock of the wireless terminal comprises the server sending a synchronizing signal to the wireless terminal.

20. A system as recited in claim 13, wherein synchronizing the internal wireless terminal window clock of the wireless terminal comprises synchronizing the internal server window clock to the time reference and synchronizing the internal wireless terminal window clock to the time reference.

21. A system as recited in claim 13, wherein the time reference comprises Internet time via NTP protocol.

22. A system as recited in claim 13, wherein the transmitted page from the server is based on the GSM/GPRS paging method.

23. A system as recited in claim 13, wherein the transmitted page from the server is based on the CDMA paging method.

24. A system as recited in claim 13, wherein the transmitted page from the server is based on the WCDMA paging method.