SCTP and Vertical Handoff ◾ 77
IP address, and delete IP address) described below are repeated whenever the MN
moves to a new location until the SCTP association is released.
Step 1. Obtain an IP address for a new location: e handoff preparation proce-
dure begins when the MN moves into the overlapping region of a WWAN
cell and a WLAN cell. Once the MN receives router advertisements from
the new access router (AR B), it initiates the procedure of obtaining a new IP
address, WLAN_IP. is can be accomplished using IPv6 stateless address
autoconfiguration (SAA).
Step 2. Add the new IP address to the SCTP association: After obtaining a new IP
address, WLAN_IP, the MN’s SCTP informs the CN’s SCTP that it will use a
new IP address by sending an SC ...