Distributed soft handoff among IP-based base stations
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United States of America Patent
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Feb 21, 2006
Grant Date -
Dec 19, 2002
app pub date -
Oct 12, 2001
filing date -
Mar 30, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A technique for assigning an address ('shadow address') to a mobile station that is compatible with the layer-2 address on the wireline network which serves the mobile station. The shadow address is then used as a wireline identifier for the destination address for frames ultimately destined for the mobile station. The shadow address is stored in a watch list for serving base stations, and any base station receiving a frame with a shadow address in its watch list process the frame to forward it the to mobile station. In this way, the shadow address facilitates carrying out soft handoff and smooth handoff.
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