A home migration host position control device includes an address post processing unit that is capable of receiving an address post message from the mobile node when it migrates to a different network and is assigned a new temporary address. A home migration host list hold unit can store address information...http://www.google.com.hk/patents/US7110401?utm_source=gb-gplus-share專利 US7110401 - Mobile communication control device for servicing a mobile node
