A Fast Handoff Scheme Between PDSNs in 3G Network.

This paper proposes a fast handoff scheme between PDSNs (Packet Data Serving Nodes) which provide packet services to a mobile node. The proposed handoff scheme does not require reestablishment of a PPP connection that may occur in the process of performing handoff between PDSNs. The handoff method between PDSNs requires that the PDSNs should receive subscribers' information about mobile nodes from their neighbor PDSNs forming a communication network. When the PDSN recognizes the mobile node moving into its coverage area, it can quickly establish a communication channel with the mobile node based on the subscriber information received already. As a result, the handoff is performed without reestablishing PPP. Therefore, the handoff between PDSNs can be performed faster removing time needed for establishing a PPP session with a terminal and for terminating a previously set up PPP session. [ABSTRACT FROM AUTHOR]