Handover of a mobile station from an internal cellular...

Details Handover of a mobile station from an internal cellular... Handover of a mobile station from an internal cellular...

2006-08-15

2006-08-15

Cumming, William D. (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C370S321000, C370S331000

Reexamination Certificate

active

07092709

ABSTRACT:
A method of handing off a mobile station (MS B) from an internal cellular communications network to an external cellular communications network having a network controller, the method comprising: allocating at least one cell of the internal cellular network as a border cell (E); detecting the movement of said mobile station (MS B) into said border cell (E); generating an advance hand-off request in accordance with a prediction algorithm which uses a set of predetermined parameters associated with said mobile station (MS B) and determines when a hand-off is likely to be required; and responsive to said advance hand-off request setting up a communication channel in the external cellular communications network for use by said mobile station (MS B) when an actual hand-off request is made, wherein said external network and said internal network is a packet switched network.

REFERENCES:
patent: 4737978 (1988-04-01), Burke et al.
patent: 4829554 (1989-05-01), Barnes et al.
patent: 6507567 (2003-01-01), Willars
patent: 6519235 (2003-02-01), Kim et al.
patent: 0 725 552 (1996-08-01), None
patent: 0 883 266 (1998-12-01), None
patent: WO 98/25431 (1998-06-01), None

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