Method for handoff between PDSN
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United States of America Patent
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Issued Date -
May 5, 2005
app pub date -
Aug 19, 2004
filing date -
Nov 5, 2003
priority date (Note) -
Abandoned
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Abstract
A method for handoff between packet data serving nodes (PDSNs) The method for handoff between packet data serving nodes (PDSNs) provides packet services to a mobile node. A new PDSN receives subscriber information of a mobile node from at least one or more old PDSNs forming a communications network. The new PDSN recognizes the mobile node moving into a concerned area of the new PDSN and then transmits recognition information on the mobile node to an old PDSN to which the mobile node was connected. All received information on the mobile node is transmitted by the old PDSN based on the recognition information. A communication channel is established with the mobile node based on the received information. In the method, handoff is performed without reestablishing PPP. Accordingly, handoff between PDSNs can be performed faster, reducing the time needed for establishing a PPP session with a terminal and for terminating a previously set up PPP session.
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