nTransparency
–mobile
end-systems keep their IP address
–continuation
of communication after interruption of link possible
–point of
connection to the fixed network can be changed
nCompatibility
–support of
the same layer 2 protocols as IP
–no changes
to current end-systems and routers required
–mobile
end-systems can communicate with fixed systems
nSecurity
–authentication
of all registration messages
nEfficiency and scalability
–only little
additional messages to the mobile system required (connection typically via a low bandwidth radio link)
–world-wide
support of a large number of mobile systems in the whole Internet