CDMA type mobile radio communication system capable of realizing an effective system operation without excess and deficiency of radio base stations simultaneously connected
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
May 29, 1998
filing date -
Aug 11, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a code division multiple access (CDMA) cellular type mobile radio communication system, in order to realize effective system operation with neither more nor less of radio base stations which are simultaneously communicated with a mobile station on carrying out soft handoff, it is possible for the mobile station to communicate with the radio base stations having proper numbers in accordance with propagation environment and a moving speed of the mobile station by changing threshold levels for selection of the radio base stations and a hysteresis margin therefor on the basis of a variation rate in a propagation loss estimated by a reception level of a pilot signal.
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