Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-04-07
1998-10-13
Le, Thanh Cong
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455444, H04Q 736
Patent
active
058226974
ABSTRACT:
A hybrid cellular mobile communication system is disclosed that contains a first layer having a plurality of radio communication micro-cells, and a second layer of radio communication cells of a larger size which, in operation, overlay the micro-cells. The hybrid cellular system provides that when a control switching center detects rapid amounts of micro-cell to micro-cell transfers of an ongoing call (such as when a call is occurring from a car moving on a highway), the call is transferred to the second cellular layer for handling. The second cellular layer includes cells which cover a larger geometric area, thereby reducing the number of "hand-offs" or transfers that the call would undergo when the mobile telephone user is traveling quickly across the geographic areas covered by the micro-cells.
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Cong Le Thanh
Hitachi America Ltd.
Sideris, Esq. John J.
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