Method and apparatus for selective examination of PPP packets for renegotiation of a PPP link on a Um interface

• US 20020181510A1
• Filed: 05/31/2001
• Published: 12/05/2002
• Est. Priority Date: 05/31/2001
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Abrol, Nischal, Lioy, Marcello
• Granted Patent: US 7,403,498 B2
• Time in Patent Office: Days
• US Class Current: 370/503
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 36/12 Reselecting a serving backbone network switching or routing node
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 92/045 between access point and backbone network device
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

A method and system that provides for efficient re-synchronization of a PPP link on a U_m interface is provided. When the PPP link is connected, if an indication that the communications of the mobile station is associated with a new network server is detected, only the U_m interface will undergo PPP configuration renegotiation. The method and system does not require the examination of all data packets for determining whether PPP configuration renegotiation is required.

Claims

1. A method for re-synchronizing a PPP link, comprising:

detecting a trigger indicating whether a remote station is associated with a new base station;

determining whether the new base station is associated with a new network server; and

re-synchronizating the PPP link if the remote station is associated with the new network server.

2. The method according to claim 1, wherein the detecting comprises detecting an RLP reset.

3. The method according to claim 1, wherein the detecting comprises detecting a message indicating a handoff.

4. The method according to claim 1, wherein the detecting comprises detecting coming out of dormancy.

5. The method according to claim 1, wherein the determining comprises determining whether a received packet is a control packet.

6. The method according to claim 5, wherein the control packet comprises a link control protocol (LCP) negotiation request.

7. The method according to claim 5, wherein the control packet comprises an Internet protocol control protocol (IPCP) negotiation request.

8. The method according to claim 1, wherein the re-synchronizing comprises re-synchronizing the PPP link only on the U_m interface.

9. The method according to claim 1, wherein the network server comprises an interworking function (IWF).

10. The method according to claim 1, wherein the network server comprises a packet data serving node (PDSN).

11. The method according to claim 1, wherein the remote station functions under a CDMA environment.

13. The method according to claim 12, wherein the detecting comprises detecting when an RLP reset occurs.

14. The method according to claim 12, wherein the detecting comprises detecting when a handoff occurs.

15. The method according to claim 12, wherein the detecting comprises detecting when coming out of dormancy.

20. The apparatus according to claim 19, wherein the trigger comprises an RLP reset.

21. The apparatus according to claim 19, wherein the trigger comprises a message indicating a handoff.

22. The apparatus according to claim 19, wherein the trigger comprises an indication of coming out of dormancy.

24. The apparatus according to claim 23, wherein the trigger comprises an RLP reset.

25. The apparatus according to claim 23, wherein the trigger comprises a message indicating a handoff.

26. The apparatus according to claim 23, wherein the trigger comprises an indication of coming out of dormancy.

12. A method for re-synchronization of a PPP link, comprising:

establishing a PPP link;

detecting a condition that indicates whether PPP re-synchronization is required; and

re-synchronizing the PPP link if it is determined that PPP re-synchronization is required.

16. A computer readable medium embodying a method for re-synchronizing a PPP link, the method comprising:

detecting a trigger indicating whether a remote station is associated with a new base station;

determining whether the new base station is associated with a new network server; and

re-synchronizating the PPP link if the remote station is associated with the new network server.

17. A remote station apparatus comprising:

means for detecting a trigger indicating whether the remote station is associated with a new base station;

means for determining whether the new base station is associated with a new network server; and

means for re-synchronizating a PPP link if the remote station is associated with the new network server.

18. A base station apparatus comprising:

means for detecting whether a new remote station is associated with the base station;

means for determining whether the base station is associated with a new network server; and

means for re-synchronizating a PPP link if the base station is associated with the new network server.

19. A base station apparatus comprising:

a processor configured to detect a trigger indicating whether a new remote station is associated with the base station, the processor being further adapted to determine whether the base station is associated with a new network server;

a receiver adapted to receive PPP re-synchronization signals, the receiver being connected to the processor; and

a transmitter adapted to send PPP re-synchronization signals, the transmitter being connected to the processor.

23. A remote station apparatus comprising:

a processor configured to detect a trigger indicating whether the remote station is associated with a new base station, the processor being further adapted to determine whether the new base station is associated with a new network server;

a receiver adapted to receive PPP re-synchronization signals, the receiver being connected to the processor; and

a transmitter adapted to send PPP re-synchronization signals, the transmitter being connected to the processor.