Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2003-05-09
2008-12-30
D'Agosta, Stephen M (Department: 2617)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S310200, C370S319000, C370S320000, C370S321000, C370S322000, C370S328000, C370S329000, C455S432100, C455S435100, C455S435200, C455S436000, C455S450000, C455S466000
Reexamination Certificate
active
07471659
ABSTRACT:
A system and method for determining 1xEV-DO availability for a packet data call in a wireless device is presented. When the wireless device receives a request to initiate a packet data call, the device determines if it currently has access to a preferred 1xEV-DO channel. The determination can be made by consulting a 1xEV-DO availability list stored in persistent memory on the wireless device. If available, the wireless device originates the packet data call on the 1xEV-DO channel. If the device is using a CDMA system that has 1xEV-DO channels but the availability or usability of those channels are unknown, the device polls the signal strength on the 1xEV-DO channels to determine the best 1xEV-DO channel to use for the packet data call. If no 1xEV-DO channel is available or if none of the available 1xEV-DO channels are usable, then the device originates the packet data call on a CDMA channel.
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International Search Report-PCT/US04/014454, International Search Authority European Patent Office, Jun. 12, 2004.
Andrus Don N.
Cooper Rotem
Huang Sen-Der
Hutchison James A.
Turner Simon
D'Agosta Stephen M
QUALCOMM Incorporated
Rouse Thomas R.
Simon Darren M.
Tam Kam T.
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