Handoff mechanism in Mobile IP

Among the characteristics of the future wireless networks is the desire to support a wide range of wireless users and a diverse set of services from many different types of networks. A unifying technology for diverse wireless networking is mobile IP, a protocol established by the Internet Engineering Task Force (IETF) that allows mobile nodes (MN) to change their point of attachment to the Internet while still being able to maintain a connection to the network mobile IP is designed to support the mobility of a user, it is the only current means for offering seamless roaming to mobile computers in the Internet. In this paper, we give a brief survey of mobile IP operation and functions, as well as proposed pi-calculus algorithm of enhancement mobile IP (E-mobile IP) handoff mechanism using link layer information to enhance the performance in term of packet loss and handoff latency.