The rapid growth of mobile systems and the exponential spread of the Internet have requested technologies for efficient and seamless delivery of IP data to mobile users. However, the Mobile Internet Protocol and the IETF Mobile IPv6 proposal are not scalable and capable of handling real time applications. The Mobile Internet Protocol employs mobility agents to support Internet-wide mobility, and mobile node employs the concept of care-of address to communicate with its correspondent node when it changes its point of attachment to the Internet. This paper proposes a new addressing scheme for mobile node based on IPv6. The concept of Mobile Internet is introduced, which is a logical subnet of IPv6 Internet and supports IP layer mobility. Mobile Internet is geographically overlaid on the Internet. It has a fixed subnet prefix, and each mobile node in it is only identified by its home IP address, regardless of its current location. Some new kinds of mobility agents (LRPC, LRPS/FLR) are defined. The proposed scheme is considered as a long-term solution for the Internet with mobile computers, several defects in the current Mobile IP protocol are solved.