the present invention solves these problems with a new proxy binding update request and proxy binding acknowledgment messages having new indicators and identification information . namely , the home agent / local mobility anchor will exchange proxy binding update messages and proxy binding acknowledge messages that include information such as mobile node identification , home network prefix , but can also include selective information fields such as , access type , handover indicator , and interface identification by including new access type , indicator , and identification information , the local mobility anchor can respond to a binding update request message with a better understanding of the new connectivity request from the mobile node .