Cellular mobile station system
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United States of America Patent
Stats
-
Jun 15, 1999
Grant Date -
N/A
app pub date -
Jun 13, 1997
filing date -
Dec 15, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cellular mobile station system wherein a handover decision is based on measuring downlink transmissions of a serving cell and neighboring cells by a mobile station. Adjacent cells are typically arranged to be partly overlapping so as to ensure there is a sufficient period of time for the reception and decoding of the downlink transmissions of the neighboring cells, as well as for a handover decision. In some of the cells, there may be terrain obstacles, buildings, tunnels or the like obstacles shadowing the downlink transmission of the neighboring cell so that overlapping is not sufficient between such a cell and a neighboring cell. A repeater or an antenna is provided for extending the coverage area of the downlink transmission of the shadowed neighboring cell in such a cell so as to allow an advanced transmission and decoding of the downlink transmission of the shadowed neighboring cell.
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