Paging for non-real-time communications using cellular networks

• US 20060172747A1
• Filed: 01/31/2005
• Published: 08/03/2006
• Est. Priority Date: 01/31/2005
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Jasper Systems, Inc. (Cisco Systems, Inc.)
• Inventors: Mohammed, Jahangir
• Granted Patent: US 8,073,469 B2
• Time in Patent Office: Days
• 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

Improvements for paging in wireless networks is disclosed. A wireless terminal clock is synchronized to a server clock and a paging window and a dormant window are derived for communicating between the server and the wireless terminal using the synchronized time. During the paging window a control channel for a cellular network is found by the wireless terminal; and the page may be received from the server at the wireless terminal.

Claims

1. A method of paging for wireless networks comprising:

synchronizing a wireless terminal clock to a server clock;

deriving a paging window and a dormant window for communicating between the server and the wireless terminal using the synchronized time; and

during the paging window;

finding a control channel for a cellular network by the wireless terminal;

and

receiving a page from the server at the wireless terminal.

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

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

4. A method as recited in claim 1, wherein synchronizing a wireless terminal clock to a server clock comprises synchronizing the server clock to an external time reference and synchronizing 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 a wireless terminal clock to a server clock comprises synchronizing the server internal clock to an external time reference and synchronizing 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 received page from the server is based on the GSM/GPRS paging method.

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

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

10. A method as recited in claim 1, wherein deriving a paging window and a dormant window is based at least in part on a wireless terminal identification number.

11. A method as recited in claim 1, wherein deriving a paging window and a dormant window can be changed by the server.

12. A method as recited in claim 1, wherein finding the control channel for the cellular network by the wireless terminal includes searching a last control channel camped on.

13. A method as recited in claim 1, wherein finding the control channel for the cellular network by the wireless terminal includes searching a list of most recent control channels.

14. A method as recited in claim 1, wherein finding the control channel for the cellular network by the wireless terminal includes searching a last neighbor control channel list.

16. 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 wireless terminal clock, and running circuitry to respond to an interrupt.

9. (canceled)

15. A system for paging for wireless networks comprising:

a time reference;

an internal server clock;

a server processor for synchronizing the internal server clock with the time reference and for deriving a paging window and a dormant window;

an internal terminal clock;

a terminal processor for synchronizing the internal terminal clock with the time reference and for deriving a paging window and a dormant window;

a terminal radio receiver for receiving pages from the server; and

a terminal radio transmitter for transmitting information to the server.

17. A system as recited in claim 15, wherein the time reference comprises a GPS time reference.

18. A system as recited in claim 15, 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 wireless terminal clock, and running circuitry to respond to an interrupt.