in 150 during which the mih is processed the mobile router transmits a cached ra signal to the mn in the mih follow up operation 160 meanwhile the mobile agent transmits to the hlr either a proxy binding update pbu signal including an l2 id a care of address coa and a prefix of the connected mn or a location registration request signal the hlr configures the binding entry including an l2 ids list a connected coa and a prefix of the mn and transmits the binding entry to the mobile agent using either a proxy binding acknowledgement pba signal or a location registration acknowledgement signal specifically the mobile agent is assigned with either a home of address hoa or the prefix to configure the binding entry including the l2 id and the hoa and or the prefix and transmits information on the hoa and or the prefix to the mobile router using either an hoa update signal or the ra signal meanwhile the mn which has received the ra signal selectively transmits the request for a dynamic host configuration protocol dhcp to the mobile router in response to the request for dhcp from the mn which has received the ra signal the mobile router receives the information on the hoa and the prefix from the mobile agent and transmits transmit the information on the hoa and the prefix to the corresponding mn at this time the mobile router may receive information on the hoa and.