METHOD FOR GUARANTEEING GROUP MOBILITY UNDER MOBILE IPV6 ENVIRONMENT, SPECIALLY RELATED TO PREVENTING CONTROL TRAFFIC OF A MOBILE NETWORK FROM BEING CONGESTED EVEN THOUGH THE MOBILE NETWORK IS FREQUENTLY HANDED OFF OR ROAMING

摘要

PURPOSE: A method for guaranteeing group mobility under mobile IPv6 environment is provided to manage mobile nodes received within a mobile network as the first group, and to transmit a new Co-CoA(Collocated Care-Of-Address) to an HA(Home Agent) of the mobile nodes of the first group while the mobile network is roaming or handed off, to change current positions of each mobile node, thereby guaranteeing mobility of the mobile node group. CONSTITUTION: A mobile router(101) transmits a solicitation message(S301). A BR2 broadcasts an advertising message including a self IP address(S302). The mobile router(101) transmits a BU(Binding Update) message including a self home address and a newly obtained IP address(S303). An HA1 transmits a response message showing that a current position registration is completed to the mobile router(101)(S304). The HA1 transmits the BU message to an HA2(S305). The HA2 updates current positions of mobile nodes(MN1-MN3), and transmits a response message to the HA1(S306). The HA1 transmits the BU message to a CN(Corresponding Node), so that the CN perceives that the current positions of the nodes(MN1-MN3) are changed(S307,S308). The CN directly transmits data packets to the changed current positions(S309).