Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-12-11
2007-12-11
Kincaid, Lester G. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S067130, C455S456100, C370S350000, C370S328000
Reexamination Certificate
active
10777880
ABSTRACT:
A method and device are provided, for locating a user of a mobile terminal, for forming a set of cells for time difference measurements for a mobile terminal camped on a first cell of a cellular network and being in idle mode, the method including the steps of: receiving a first set of cell identifiers of neighboring cells for the first cell, with each of the neighboring cells sending a radio signal on synchronization channels; and measuring the received signal strength for cells having identifiers which are included in the first set, with a number N of cells having a signal strength exceeding a predefined threshold constituting a set of available cells; wherein the improvement includes the steps of: reading the synchronization channels for the set of available cells, thereby measuring time differences for the set of available cells; and selecting a second set from the set of available cells using a predefined selection rule, the second set including M<N cells, thus forming a new set of cells for time difference measurements.
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Bell Boyd & Lloyd LLP
Herrera Diego
Kincaid Lester G.
Siemens Aktiengesellschaft
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