METHOD FOR EFFECTIVE FAST RE-PAGING IN A WIRELESS COMMUNICATION NETWORK

• US 20080254814A1
• Filed: 03/07/2008
• Published: 10/16/2008
• Est. Priority Date: 04/16/2007
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Harris, John M., Erickson, Paul M., Marsan, Mark J., Hettich, Donivon
• Granted Patent: US 9,485,750 B2
• Time in Patent Office: Days
• US Class Current: 455/458
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 68/06 using multi-step notification by changing the notification area
• CPC Class Codes: H04W 68/08 using multi-step notification by increasing the notification area

Abstract

A method for paging a mobile station where the mobile station (208-212) may be in a dormant state is described. The method begins by sending a first paging message (302) in a first zone (214) of a given area to a selected mobile station wherein the first paging message is sent at the beginning of a paging interval (300). A base station (202-206) then receives a response to the paging message when the mobile station is in the first zone. When the response to the first paging message is not received, a second paging message (306) is sent in a second zone (216) of the given area. The second paging message is sent at a first offset (308) from the sending of the first paging message wherein this first offset occurs less than one paging interval after the sending of the first page message.

Claims

1. A method comprising:

sending a first paging message in a first zone to a selected communication device wherein the first paging message is sent at the beginning of a paging interval;

receiving a response to the paging message when the communication device is in the first zone, and

sending a second paging message in a second zone when the response to the first paging message is not received wherein the second paging message is sent at a first offset from the sending of the first paging wherein this first offset occurs less than one paging interval after the sending of the first page message.

2. The method according to claim 1 wherein the second zone include a range that does not overlap with the first zone such that the first paging message is not sent to the range, and the second paging message is sent to the range, when no page response is received after the first page message.

4. The method according to claim 1 further comprising sending a third paging message in a third zone when a response to the second message is not received wherein the third paging message is sent at a second offset from the sending of the first page within the paging interval.

5. The method according to claim 1 wherein the communication device does not perform a routing area update when moving from the first paging zone to the second paging zone.

6. The method according to claim 1 wherein the communication device performs a routing area update when moving from the first paging zone to the second paging zone.

7. The method according to claim 1 wherein the first zone and the second zone include a range that overlaps such that the first paging message and the second paging message are sent to the range and when no page response is received after the first page message.

8. The method according to claim 1 wherein the first zone comprises a first group of sectors where the mobile station is most likely to be located and the second zone comprises a second group of sectors where the mobile station is most likely to be located when the mobile station is not in the first zone.

9. The method according to claim 1 further comprising determining which sectors are associated to one of the first zone and the second zone according to one of a distance from the last reported paging zone, time since a last report, presence of an overload condition indicator, signal strength of mobile stations with the first zone and the second zone, likelihood a mobile station will receive a page, the membership of the cell and a higher priority paging group, and battery life.

3. The method of claim one wherein the first paging message is always sent at the start of the paging interval.

10. A method comprising:

determining if a mobile station was last in one of a first zone or a second zone;

waking up a mobile station from a sleep mode at the beginning of a paging interval when it is determined that the mobile station was last in the first zone;

determining if a first paging message is being received at the beginning of the paging interval;

sending a response when the first paging message is received at the beginning of the paging interval;

determining if a second paging message is being received at a first offset from the paging interval when the first paging message is not received at the beginning of the paging interval wherein the first offset is within the paging interval;

sending a response when the second paging message is received at the first offset;

waking up the mobile station from the sleep mode at the first offset when it is determined that the mobile station was last in the second zone;

determining if the first paging message is being received at the first offset, and

sending a response when the first paging message is received at the first offset.

11. The method according to claim 10 further comprising:

determining if a third paging message is being received at a second offset from the paging interval when the first paging message is not received at the first offset wherein the second offset is within the paging interval, and

sending a response when the third paging message is received at the second offset.

12. The method according to claim 10 further comprising:

waking up the mobile station at the beginning of a next paging interval after the first offset when the first paging message is not received at the first offset.

13. The method according to claim 10 wherein the first zone and the second zone include a range that overlaps such that the first paging message and the second paging message is sent to the range and wherein the range is smaller than the first zone and the second zone.

14. The method according to claim 10 wherein the first zone comprises a first group of sectors where the mobile station is most likely to be located and the second zone comprises a second group of sectors where the mobile station is most likely to be located when the mobile station is not in the first zone.

15. The method according to claim 10 wherein the first zone comprises routing area of the mobile station and the second zone comprises sectors where the mobile station is most likely to be located when the mobile station is not in the first zone.

16. The method according to claim 10 wherein the first offset is 80 msecs.

17. The method according to claim 16 wherein the paging interval is between 3 and 5 seconds.

18. A method comprising:

waking up a mobile station from a sleep mode at the beginning of a first paging interval;

determining if a first paging message is received at a first offset from the paging interval wherein the first offset is within the paging interval;

determining if a second paging message is received at a second offset from the paging interval when the first paging message is not received;

determining if a third paging message is received at a second paging interval at a time equal to the paging interval from the first paging interval when the second paging is not received, and

sending a response when the third paging message is received.

19. The method according to claim 18 wherein the first zone and the second zone include a range that overlaps such that the first paging message and the second paging message is sent to the range and wherein the range is smaller than the first zone and the second zone.

20. The method according to claim 18 wherein the first zone comprises a first group of sectors where the mobile station is most likely to be located and the second zone comprises a second group of sectors where the mobile station is most likely to be located when the mobile station is not in the first zone.