Dormant handoff in a packet data network

• US 20050094601A1
• Filed: 11/17/2004
• Published: 05/05/2005
• Est. Priority Date: 10/10/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Mahendran, Arungundram C., Hsu, Raymond T.
• Granted Patent: US 8,023,464 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 36/00 Hand-off or reselection arrangements
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 60/06 De-registration or detaching
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Mobile unassisted dormant handoff in a wireless communication system supporting packet data communications. While in a dormant mode, a mobile node may change packet zones, wherein different packet zones are serviced by at least one different infrastructure element, without identifying the change to the system. The change in packet zone does not necessarily trigger establishment of a communication path for the mobile node until there is packet data ready for communication. In one embodiment, mobile assistance is adapted to the system, and is disabled at the mobile node by an indication in a system parameter message transmitted by the system and received by the mobile node.

Claims

1. A method for operating a dormant mobile node roaming from a first packet zone identified by a first packet zone identifier, comprising:

preventing the dormant mobile node from sending an origination message when the dormant mobile node enters a second packet zone identified by a second packet zone identifier.

2. A method according to claim 1, further comprising:

updating location of the dormant mobile node if there is incoming data to the dormant mobile node.

3. A method according to claim 2, further comprising:

if there is incoming data to the dormant mobile node, forwarding data from a serving PDSN to a serving BS/PCF on a current active A10 connection.

4. A method according to claim 3, when the dormant mobile node moves from a serving BS/PCF to a target BS/PCF, further comprising:

paging the dormant mobile node,

authorizing the establishment of a traffic channel for the dormant mobile node;

creating a new A8 connection to the target PCF; and

creating a new A10 connection towards the PDSN.

5. A method according to claim 4, if both the serving PCF and target PCF are connected to the same PDSN, further comprising:

removing the old A10 connection with the serving PCF;

establishinh a new A10 connection with the target PCF such that new data intended for the dormant mobile node goes through the target PCF.

6. A method according to claim 5, if both the serving PCF and target PCF are connected to different PDSNs, further comprising:

performing Link layer (PPP) re-establishment and Mobile IP re-registration between the mobile node and the PDSN connected to target PCF; and

establishing a new A10 connection between target PCF and the target PDSN.

7. A method according to claim 1, further comprising:

if the dormant mobile node has data to send, sending an origination message with a Data Ready to Send (DRS) indicator bit set to 1.

8. A method according to claim 1, wherein the dormant mobile node is a mobile node having a PPP link between the mobile node and a packet data serving node, and not having a physical traffic channel between the mobile node and a base station.

9. A wireless communication system, comprising:

a dormant mobile node that is prevented from sending an origination message when the dormant mobile node moves from a first packet zone identified by a first packet zone identifier to a second packet zone identified by a second packet zone identifier.

10. A wireless communication system according to claim 9, wherein if there is incoming data to the dormant mobile node the location of the dormant mobile node is updated.

11. A wireless communication system according to claim 10, further comprising:

a serving PDSN;

a serving BS/PCF;

a current active A10 connection, wherein if there is incoming data to the dormant mobile node, the serving PDSN forward the incoming data to the serving BS/PCF via the current active A10 connection.

12. A wireless communication system according to claim 11, further comprising:

a target BS/PCF,

a MSC;

when the dormant mobile node moves from the serving BS/PCF to the target BS/PCF, the MSC pages the dormant mobile node, the dormant mobile node responds to the page from the target BS/PCF, the MSC authorizes the establishment of a traffic channel for the dormant mobile node, the target BS creates a new A8 connection to the target PCF, and the target PCF creates a new A10 connection towards the PDSN.

13. A wireless communication system according to claim 12, if both the serving PCF and target PCF are connected to the same PDSN, the old A10 connection with the serving PCF is removed and a new A10 connection with the target PCF is established such that new data intended for the dormant mobile goes through the target PCF.

14. A wireless communication system according to claim 13, if both the serving PCF and target PCF are connected to different PDSNs, then Link layer (PPP) re-establishment and Mobile IP re-registration is performed between the mobile node and the PDSN connected to target PCF, and a new A10 connection is established between target PCF and the target PDSN.

15. A wireless communication system according to claim 9, wherein if the dormant mobile node has data to send, the dormant mobile node sends an origination message with a Data Ready to Send (DRS) indicator bit set to 1.

16. A wireless communication system according to claim 9, wherein the dormant mobile node is a mobile node having a PPP link between the mobile node and a packet data serving node, and not having a physical traffic channel between the mobile node and a base station.

17. A mobile node, comprising:

means for sending an origination message; and

means for preventing the mobile node from sending the origination message when the mobile node is dormant and roams from a first packet zone identified by a first packet zone identifier to a second packet zone identified by a second packet zone identifier.

18. A method according to claim 17, wherein the dormant mobile node updates its location if the mobile node has data to send by having the dormant mobile node send an origination message with a Data Ready to Send (DRS) bit set to 1.

19. A method according to claim 17, wherein the dormant mobile node has a PPP link between the mobile node and a packet data serving node, and does not having a physical traffic channel between the mobile node and a base station.

20. A mobile node, comprising:

a processor that prevents the mobile node from sending an origination message when the mobile node is in a dormant state and moves from a first packet zone identified by a first packet zone identifier to a second packet zone identified by a second packet zone identifier.

21. A mobile node according to claim 20, further comprising:

a receiver unit that receives incoming data, wherein if there is incoming data and the mobile node is in a dormant state, the location of the dormant mobile node updated.

22. A mobile node according to claim 21, when the dormant mobile node moves from a serving BS/PCF to a target BS/PCF, the dormant mobile node responds to a page from the target BS/PCF to establish of a traffic channel for the dormant mobile node.

23. A mobile node according to claim 20, further comprising:

a transmitter unit that sends data, wherein if the dormant mobile node has data to send, the dormant mobile node sends an origination message with a Data Ready to Send (DRS) indicator bit set to 1.

24. A mobile node according to claim 20, wherein the dormant mobile node has a PPP link between the mobile node and a packet data serving node, and does not having a physical traffic channel between the mobile node and a base station.

27. A method according to claim 21, wherein the dormant mobile node has a PPP link between the mobile node and a packet data serving node, and does not having a physical traffic channel between the mobile node and a base station.

25. A method, comprising:

sending an origination message; and

preventing a mobile node from sending the origination message when the mobile node is dormant and roams from a first packet zone identified by a first packet zone identifier to a second packet zone identified by a second packet zone identifier.

26. A method according to claim 25, wherein the dormant mobile node updates its location if the mobile node has data to send by having the dormant mobile node send an origination message with a Data Ready to Send (DRS) bit set to 1.