Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-01-09
2007-01-09
D'Agosta, Steve M. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S432100, C455S436000, C455S443000, C455S444000, C455S450000, C370S331000, C370S332000, C370S333000, C370S334000
Reexamination Certificate
active
10860684
ABSTRACT:
In order to cover a mobile telecommunication zone, an access network node comprises a first multisector antenna to transmit and receive in several first main directions on one and the same first fixed frequency each covering a first sector having on either side of the first main direction, a common border with another first sector. A second multisector antenna situated at the same place as the first multisector antenna makes it possible to transmit and receive in several second main directions on a second fixed frequency each covering a second sector having on either side of the second main direction, a common border with another second sector, each second main direction being on the axis of a border between two first sectors. A hard handover from the first to the second frequency is triggered for a mobile which is approaching a border common to two first sectors.
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Georgeaux Eric
Gruet Christophe
D'Agosta Steve M.
Nortel Networks Limited
Trop Pruner & Hu PC
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