Method and apparatus for soft handoff between base stations using different frame formats
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United States of America Patent
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Apr 23, 2013
Grant Date -
Jun 19, 2008
app pub date -
Feb 4, 2008
filing date -
Jul 5, 2001
priority date (Note) -
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Abstract
A method of enabling soft handoff between base stations using different signaling frame formats allows soft handoff from an origination base station supporting a lower Protocol Data Unit revision format to an alternative base station supporting a higher Protocol Data Unit revision format, as well as soft handoff between an origination base station supporting a higher Protocol Data Unit revision format to an alternative base station supporting a lower Protocol Data Unit revision format. The base station using the higher Protocol Data Unit revision format downgrades to the lower Protocol Data Unit revision format for the duration of soft handoff. As all base stations use the same Protocol Data Unit revision format during soft handoff, the signals from all of the receive paths can be combined by a mobile station.
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