Mobile station operating in an analog mode and for subsequent handoff to another system
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United States of America Patent
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Apr 16, 1996
Issued Date -
N/A
app pub date -
Jan 31, 1995
filing date -
Apr 14, 1993
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A method of mobile station synchronization to a system time, wherein the time alignment is attained while the mobile station operates in analog mode. The mobile stations transmits a periodic signal, each period of which has a leading edge. The base station detects the leading edge of the periodic signal and compares it to an indication of system time. The base station generates an error message for the mobile station indicating an update to the phase of the periodic signal. When the mobile station and the base station are time aligned, the base station may send a message indicating the absolute time at some future leading edge of the periodic signal thereby eliminating ambiguities of time due to the finite time required to receive the message.
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