OPTIMIZED DATA RECONNECT

• US 20110026489A1
• Filed: 10/08/2010
• Published: 02/03/2011
• Est. Priority Date: 12/29/2003
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Research In Motion Limited (Blackberry Limited)
• Inventors: Hossain, Asif, Kim, Jin, Islam, Muhammad Khaledul
• Granted Patent: US 8,483,180 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

A method of optimizing reconnection of a point to point protocol link layer in a mobile device comprising the steps of: monitoring whether the mobile device has entered a new zone; starting a stabilization period when the mobile device enters a new zone; checking whether the mobile device enters a different zone during the stabilization period; if the mobile device enters a different zone during the stabilization period, restarting the stabilization period and performing the checking step; and if the mobile device does not enter a new zone during the stabilization period, determining whether the mobile device is in a new zone, reconnecting to the new zone if the mobile device is in the new zone, and otherwise performing no reconnection.

Claims

1. A method of maintaining data connectivity of a mobile device in a network, comprising:

establishing a data link between the mobile station and a first zone;

starting a stabilization period upon detecting that the mobile station has entered a second zone from the first zone;

after the stabilization period ends, determining if the mobile station is in the second zone; and

if the mobile station is in the second zone after the stabilization period ends, then reconnecting the data link to the second zone.

2. The method of claim 1, wherein if the mobile station is in the first zone after the stabilization period ends, then maintaining the data link between the mobile station and the first zone.

3. The method of claim 1, wherein if the mobile station is in the first zone after the stabilization period ends, then reconnecting the data link between the mobile station and the first zone.

4. The method of claim 1, further comprising:

detecting that the mobile station has entered a third zone from the second zone during the stabilization period; and

in response to detecting that the mobile station has entered the third zone, restarting the stabilization period.

5. The method of claim 4, further comprising:

after the stabilization period ends, determining if the mobile station is in the third zone; and

if the mobile station is in the third zone after the stabilization period ends, then reconnecting the data link to the third zone.

6. The method of claim 1, wherein the data link is a point to point protocol link.

7. The method of claim 1, wherein a change in a system identifier is detected to indicate that the mobile station has entered the second zone from the first zone.

8. The method of claim 1, wherein a change in a network identifier is detected to indicate that the mobile station has entered the second zone from the first zone.

9. The method of claim 1, wherein a change in a packet identifier is detected to indicate that the mobile station has entered the second zone from the first zone.

10. The method of claim 1, wherein the stabilization period is measured using a stabilization timer.

11. A mobile station that includes software instructions for maintaining data connectivity in a network, the software instructions stored in a computer readable medium and when executed by the mobile station being configured to:

establish a data link between the mobile station and a first zone;

start a stabilization period upon detecting that the mobile station has entered a second zone from the first zone;

after the stabilization period ends, determine if the mobile station is in the second zone; and

if the mobile station is in the second zone after the stabilization period ends, then reconnect the data link to the second zone.

12. The mobile station of claim 11, wherein if the mobile station is in the first zone after the stabilization period ends, then the software instructions being configured to maintain the data link between the mobile station and the first zone.

13. The mobile station of claim 11, wherein if the mobile station is in the first zone after the stabilization period ends, then the software instructions being configured to reconnect the data link between the mobile station and the first zone.

14. The mobile station of claim 11, wherein the software instructions are further configured to:

detect that the mobile station has entered a third zone from the second zone during the stabilization period; and

in response to detecting that the mobile station has entered the third zone, restart the stabilization period.

15. The mobile station of claim 14, wherein the software instructions are further configured to:

after the stabilization period ends, determine if the mobile station is in the third zone; and

if the mobile station is in the third zone after the stabilization period ends, then reconnect the data link to the third zone.

16. The method of claim 11, wherein the data link is a point to point protocol link.

17. The method of claim 11, wherein a change in a system identifier is detected to indicate that the mobile station has entered the second zone from the first zone.

18. The method of claim 11, wherein a change in a network identifier is detected to indicate that the mobile station has entered the second zone from the first zone.

19. The method of claim 11, wherein a change in a packet identifier is detected to indicate that the mobile station has entered the second zone from the first zone.

20. The method of claim 11, wherein the stabilization period is measured using a stabilization timer.