Address Sharing enabled Mobile IP utilizing NAPT

Abstract

The IP depletion problem is getting more serious with the increase in the number of mobile network devices connecting to the IP networks. To cope with this problem, we incorporate NAPT with Mobile IP to enable address sharing. In the proposed scheme, mobile nodes use private addresses as their home addresses and access Internet services using a shared public IP address. Since private addresses can be utilized without coordination, our scheme is designed to work in the presence of address collision. Furthermore, our scheme is transparent to mobile nodes and correspondent nodes. Therefore, it can be easily deployed because the protocol stacks of mobile nodes and correspondent nodes need not to be modified. Briefly, Mobile IP can accommodate more mobile nodes by adopting the scheme presented in this paper.