Method for a radio telephone to search for higher priority networks

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7519365
APP PUB NO 20070202875A1
SERIAL NO

11742699

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for a radiotelephone to search for a high priority, home, or home-equivalent public land mobile network (PLMN) includes a first step of registering and camping (300) the radiotelephone on a cell of visited PLMN. A next step includes uniquely identifying (302) the cell. A next step includes searching (304) for PLMNs with a higher priority than the visited PLMN while registered and camped on the uniquely identified cell. A next step includes storing (306) a history of those frequencies found that are not of a higher priority PLMN for the uniquely identified cell. Any subsequent searches for frequencies of higher priority PLMNs performed while registered and camped on that cell includes scanning (308) for available frequencies except for those frequencies listed in the history for the uniquely identified cell in which the radiotelephone is registered and camped.

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Patent Owner(s)

Patent OwnerAddress
GOOGLE TECHNOLOGY HOLDINGS LLC1600 AMPHITHEATRE PARKWAY MOUNTAIN VIEW CA 94043

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Binzel, Charles P Bristol , US 19 220
Dorsey, Donald A Vernon Hills , US 17 558
Raghuram, Sharada Buffalo Grove , US 21 822

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