Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2011-07-12
2011-07-12
Eng, George (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456100, C455S456200, C455S436000, C455S440000
Reexamination Certificate
active
07979080
ABSTRACT:
A location of a subscriber can be observed by means of a mobile network in a completely anonymous way, without a subscriber identifier or a temporary subscriber identifier. At first, a method extracts from a first time slot of a radio channel a message which includes information about a second time slot of a radio channel. The first time slot of a radio channel discloses the current cell of the subscriber and the second time slot of a radio channel discloses a new cell of the subscriber. A location of the subscriber is determined on the basis of the current and the new cell. This location is approximately situated in a geographical intersection area of the current and the new cell. Different kinds of statistics can be deduced from the observations concerning activities of subscribers.
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Kiviranta Veli-Matti
Knuuttila Olli
Nykopp Juha
Cohen Pontani Lieberman & Pavane LLP
Elisa Matkapuhelinpalvelut Oy
Eng George
Huynh Nam
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