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The TWNIC reports show that Internet is growing tremendously
fast and isbecoming part of our daily life these years. In
tradictional networkenvironment, network nodes move no where
after been setup. But in mobilecomputing enviroment, network
nodes are mobile. Since they would moveeverywhere and still
connect to Internet by using wired or wireless medium.Current
network protocol needs modifications. Thus, Mobile-IP is
invented tosupport host mobility. Based on IETF mobile-IP, we
propose a hierarchical Mobile-IP (HMIP)infrastructure and
protocol. And provide an efficient IP-layer handoff andefficient
routing procedure. Upon reasonable simulatin model and
costparameters, the simulatin results illustrate that the
registration cost ofHMIP is less than IETF Mobile-IP. And HMIP
is less sensitive to network delay.For some specific
application, HMIP has better routing efficiency than IETFroute
optimization.
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