Handoff in radio telecommunications networks

Details Handoff in radio telecommunications networks Handoff in radio telecommunications networks

2006-01-24

2006-01-24

Ngo, Ricky (Department: 2663)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S335000, C370S338000, C370S342000, C370S352000, C455S436000

Reexamination Certificate

active

06990088

ABSTRACT:
The invention relates to an improved handoff method for mobile IP in a cdma2000 network. During handoff, the A10 connection between the Target PCF and the PDSN is pre-set-up, while the MS is still connected to a MSC, when the Target PCF receives the message from the Target BSC to set up the A8 connection. Furthermore, in the case of inter-PDSN handoff, a tunnel is established between the PDSNs, over which the PPP context eventually is transferred to the Target PDSN. The Target PDSN then sends a message to the MS triggering a re-registration with the HA. The Target PDSN takes over full responsibility for the MS when it receives the Mobile IP Result from the HA, and sends a message to the Serving PDSN to let the latter know that it can release all resources related to the MS.

REFERENCES:
patent: 6834050 (2004-12-01), Madour et al.
patent: 6834190 (2004-12-01), Lee et al.
patent: 2001/0050907 (2001-12-01), Madour et al.
patent: 0 984 656 (2000-08-01), None
patent: WO 00/05909 (2000-03-01), None
Rajesh Bhalla,Fast Handoff in CDMA2000 Wireless IP Networks—PP Interface Stage-2 and Stage-3 Descriptions, 3GPP2-P00-20010212-007, Phoenix, AZ, Feb. 12, 2001.

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