Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2008-07-29
2008-07-29
Nguyen, Duc (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456100, C455S456200, C455S456300, C455S456400, C455S456500, C455S456600
Reexamination Certificate
active
10967521
ABSTRACT:
An apparatus and a method for calculating an enhanced observed time difference from a mobile station and transmitting the enhanced observed time difference to a servicing mobile location center for a location-based service are provided. The apparatus comprises means for receiving a location-measuring request and assistance data from the servicing mobile location center; means for choosing a base transceiver station, the synchronization channel of which is to be measured, based on response time detected from the location-measuring request and a predetermined priority; and means for calculating an enhanced observed time difference for the chosen base transceiver station and transmitting a location-measuring response, including the calculation result, to the servicing mobile location center. A first priority is assigned to an overlap between a channel list included in the assistance data and a list of a number of nearby cells and a second priority is assigned to a broadcast control channel allocation list except the channel list included in the assistance data and the list of nearby cells.
REFERENCES:
patent: 2002/0102994 (2002-08-01), Tuutijarvi
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patent: 2004/0180645 (2004-09-01), Bussan et al.
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Elcenko Eric
Nguyen Duc
Samsung Electronics Co,. Ltd
The Farrell Law Firm PC
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