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Seamless HO for MIP sequence example with this protocol MN (DHCP client) DHCP server PAR NAR Layer2 switch DHCP CONFIRM/REPLY CN NS(DAD) HA DHCP REQUEST/REPLAY BU/BA BU/BA (request sending) Fast Handover options BU/BA (request buffering) Opt DAD (Moor) No need if the MN is still in same DHCP-domain User’s IP packets User’s IP packets It could be less than a hundred millisecond(?) (wireless LAN to wireless LAN HO) Tunnel Bufferring (Moor) Standard messages Proposed messages Defined in other draft Search available channel only HO trigger Access authentication 802.11i |