Method and system for data rate based vertical handoff

Details Method and system for data rate based vertical handoff Method and system for data rate based vertical handoff

2009-05-06

2010-06-15

Cho, Un C (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S335000, C455S552100, C455S553100, C455S436000

Reexamination Certificate

active

07738427

ABSTRACT:
A method and system for using data rate as a basis to allow or deny handoff from a communication system operating under a first air interface protocol (first protocol system) to a communication system operating under a second air interface protocol (second protocol system). A base station detects that a hybrid terminal has received a threshold low forward link data rate under the first protocol for a threshold time period, and the base station responsively evaluates the second protocol system to determine if the second protocol system has sufficient resources to provide at least as good a data rate as the threshold data rate. If the base station thereby determines that the second protocol system is a good alternative, then the base station will allow a handoff to occur when the terminal seeks to handoff to the second protocol. Otherwise, the base station will not allow the handoff to occur.

REFERENCES:
patent: 6728217 (2004-04-01), Amirijoo et al.
patent: 6738373 (2004-05-01), Turner
patent: 7394789 (2008-07-01), Sakawa et al.
patent: 2002/0075827 (2002-06-01), Balogh et al.

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