Distributed soft handoff among IP-based base stations

Details Distributed soft handoff among IP-based base stations Distributed soft handoff among IP-based base stations

2006-02-21

2006-02-21

Phunkulh, Bob A. (Department: 2661)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S394000, C370S350000

Reexamination Certificate

active

07002936

ABSTRACT:
A technique for assigning an address (“shadow address”) to a mobile station that is compatible with the layer-2address 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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V.K. Garg, “IS-95 CDMA and cdma 2000:Cellular/PCS Systems Implementation”,pp. 60-62, published by Prentice-Hall, 2000.

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