In case the connection of a second interface is changed from {HEAD ~ MAG} 221 of {TAIL ~ a home PMIPv6 domain} to AR 222 of a CMIPv6 domain 231, a BU message 262 is transmitted from the second interface to LMA/HA 250, and identification information of this BU message is notified to MAG from the first interface 
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In case the connection of a second interface is changed from { HEAD ~ MAG } 221 of { TAIL ~ a home PMIPv6 domain } to AR 222 of a CMIPv6 domain 231 , a BU message 262 is transmitted from the second interface to LMA / HA 250 , and identification information of this BU message is notified to MAG from the first interface
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH