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3Chapter
SCTP and Vertical Handoff
Seamless vertical handoff is the ability of a mobile terminal to successfully or
simultaneously attach to different access points in an integrated wireless network
infrastructure in a way that makes the physical movement two types of wireless net-
works transparent and preserves application-level connectivity. To achieve seamless
handoff, handoff decision algorithms, handoff metrics, and mobility handling to
maintain ongoing user connections must be addressed. Traditional handoff deci-
sion metrics based on the received signal strength (RSS) and other physical layer
parameters are insufficient for the