Dormant handoff in a packet data network

• US 8,023,464 B2
• Filed: 11/17/2004
• Issued: 09/20/2011
• Est. Priority Date: 10/10/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Hsu, Raymond T., Mahendran, Arungundram C.
• Primary Examiner(s): Ngo; Ricky
• Assistant Examiner(s): NG, CHRISTINE Y
• Application Number:
  US10/991,880
• Publication Number:
  US 20050094601A1
• Time in Patent Office: 2,498 Days
• Field of Search: 370/329, 370/331, 370/338, 370/335, 370/336, 370/328, 455/436, 455/437, 455/438, 455/439
• 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:

receiving an instruction from an access network that is configured to prevent each dormant mobile node receiving the instruction from sending an origination message;

preventing, based on the received instruction, 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 such that the access network is not notified of the dormant mobile node'"'"'s presence within the second packet zone upon entry; and

updating a location of the dormant mobile node if there is incoming data to the dormant mobile node or if the dormant mobile node has data to transmit.

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

if there is incoming data to the dormant mobile node, forwarding data from a serving Packet Data Service Node (PDSN) to a serving Base Station/Packet Control Function (BS/PCF) on a current active A10 connection.

3. A method according to claim 2, wherein 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.

4. A method according to claim 3, wherein 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; and

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

5. A method according to claim 3, wherein if both the serving PCF and target PCF are connected to different PDSNs, further comprising:

performing Link layer Point-to-Point Protocol (PPP) re-establishment and Mobile Internet Protocol (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.

6. 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.

7. A method according to claim 1, wherein the dormant mobile node is a mobile node having a Point-to-Point Protocol (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.

8. A mobile node, comprising:

means for sending an origination message;

means for receiving an instruction from an access network that is configured to prevent each dormant mobile node receiving the instruction from sending an origination message; and

means for preventing, based on the received instruction, 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 such that the access network is not notified of the dormant mobile node'"'"'s presence within the second packet zone upon entry;

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.

9. A mobile node according to claim 8, wherein the dormant mobile node has a Point-to-Point Protocol (PPP) link between the mobile node and a packet data serving node, and does not have a physical traffic channel between the mobile node and a base station.

10. A mobile node, comprising:

a receiving unit configured to receive an instruction from an access network that is configured to prevent each dormant mobile node receiving the instruction from sending an origination message; and

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 such that the access network is not notified of the dormant mobile node'"'"'s presence within the second packet zone upon entry;

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

11. A mobile node according to claim 10, when the dormant mobile node moves from a serving Base Station/Packet Control Function (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.

12. A mobile node according to claim 10, 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.

13. A mobile node according to claim 10, wherein the dormant mobile node has a Point-to-Point Protocol (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.

14. A method, comprising:

sending an origination message;

receiving, after the sending step, an instruction from an access network that is configured to prevent each dormant mobile node receiving the instruction from sending an origination message; and

preventing, based on the received instruction, 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 such that the access network is not notified of the dormant mobile node'"'"'s presence within the second packet zone upon entry,

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.

15. A method according to claim 14, wherein the dormant mobile node has a Point-to-Point Protocol (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.

16. An apparatus for operating a dormant mobile node that roams from a first packet zone identified by a first packet zone identifier comprising:

means for receiving an instruction from an access network that is configured to prevent each dormant mobile node receiving the instruction from sending an origination message;

means for preventing, based on the received instruction, 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 such that the access network is not notified of the dormant mobile node'"'"'s presence within the second packet zone upon entry; and

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

17. The apparatus according to claim 16, further comprising:

means for forwarding data from a serving Packet Data Service Node (PDSN) to a serving Base Station/Packet Control Function (BS/PCF) on a current active A10 connection, if there is incoming data for the dormant mobile node.

18. The apparatus according to claim 17, wherein when the dormant mobile node moves from a serving BS/PCF to a target BS/PCF, further comprising:

means for paging the dormant mobile node;

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

means for creating a new A8 connection to the target PCF; and

means for creating a new A10 connection towards the PDSN.

19. The apparatus according to claim 18, wherein if both the serving PCF and target PCF are connected to the same PDSN, further comprising:

means for removing the old A10 connection with the serving PCF; and

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

20. The apparatus according to claim 19, wherein if both the serving PCF and target PCF are connected to different PDSNs, further comprising:

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

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

21. The apparatus according to claim 16, wherein if the dormant mobile node has data to send, further comprising:

means for sending an origination message with a Data Ready to Send (DRS) indicator bit set to 1.

22. The apparatus according to claim 16, wherein the dormant mobile node further comprises:

means for a mobile node having a Point-to-Point Protocol (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.

23. A non-transitory computer-readable storage medium, comprising instructions for operating a dormant mobile node roaming from a first packet zone identified by a first packet zone identifier, which, when executed by a machine, cause the machine to perform operations, the instructions comprising:

instructions to receive an instruction from an access network that is configured to prevent each dormant mobile node receiving the instruction from sending an origination message;

instructions to prevent, based on the received instruction, 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 such that the access network is not notified of the dormant mobile node'"'"'s presence within the second packet zone upon entry; and

instructions to update a location of the dormant mobile node if there is incoming data for the dormant mobile node.

24. The non-transitory computer-readable storage medium of claim 23, further comprising:

instructions to forward data from a serving Packet Data Service Node (PDSN) to a serving Base Station/Packet Control Function (BS/PCF) on a current active A10 connection, if there is incoming data to the dormant mobile node.