Presentation on theme: "Mobile IP Seamless connectivity for mobile computers."— Presentation transcript:
Mobile IP Seamless connectivity for mobile computers
Problem definition IP combines routing information with host identification in a globally unique IP address. On mobility it needs to get a new IP address to indicate the new point of attachment to router.
Problem definition TCP uses IP internally to maintain connection state for connections being operated by mobile computer. On IP change connection status cannot be maintained. Reason : IP used for both routing & host identification.
Issues of mobile IP Compatibility co-work with wired infrastructure. Scalability Support large number of users. Transparency No difference in wired or wireless domain.
Terminologies MN – Mobile Node,requiring mobility support. CN - Correspondent Node, a node to which MN communicates. FA - Foreign agent, currently connected router. HA – Router corresponding to MN IP’s Subnet.
Essence of Mobile IP Usage of old IP address but with a few additional mechanisms, to provide mobility support MN assigned another Care of Address (COA)
Mobile IP Two types of COA Foreign Agent Based COA COA of the MN is address of FA. Colocated COA –IP address belonging to the home sub-net. –A topologically correct IP