Navigation assistance for call handling in mobile telephone systems
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United States of America Patent
Stats
-
Sep 23, 1997
Grant Date -
N/A
app pub date -
Feb 1, 1995
filing date -
Sep 9, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a mobile radio telephone system employing TDMA or CDMA, mobile units often must determine the timing and appropriate power necessary for transmissions to a base station. Information broadcast by base stations allows the mobile station to approximate its distance from each base station based on an average signal strength received and thereby determine the coarse sector location. Broadcast information may include the mean radial distribution of signal strength versus distance. From the broadcast information, the mobile station determines the propagation loss for a transmission to the base station and the appropriate power level and timing for transmissions. Accordingly, the mobile station transmits signals to the base station at the determined signal timing and power level.
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