IPv6 Addressing Architecture in IPv4 Network

In the Internet, nodes are identified using IP addresses that depend on their topological location. IPv4/IPv6 translation technology involves address mapping between IPv6 and IPv4 nodes and the methods used to translate protocols, where nodes are in their respective IP version of network. A detailed study is made on the IPv6 addressing architecture, various IPv6 configuring mechanisms and obtaining care-of-address. The study clearly reveals that IPv6 addressing in IPv4 network and vice-versa are not considered. The paper points out the need of IPv6 addressing in IPv4 network and proposes a new addressing mechanism with a clear implementation procedure, while not restricting any IPv6 mobile node to roam only in IPv6 based networks. The newly configured IPv6 address in the proposal is referred to as P46CGA, which includes the extensions to IPv6 stateless addressing mechanism, cryptographic methods, IPv4 router address. Using IPv4 router address in IPv6 addressing in IPv4 network helps the other routers in the internet to identify easily the current location of IPv6 node and to establish communication between them. The main focus of the proposal is to permit an IPv6 mobile node to roam also into IPv4 based network and get serviced besides roaming in IPv6 based network.