| Summary: | As the Internet becomes more and more accessible, claims for mobility are not limited anymore to
single hosts. Supporting networks’ roaming that move as one entity is required in order to enable the
transparency of Internet in mobile platforms, like cars, trains, planes, buses, etc. To accomplish this, NEMO
Basic Support has been proposed and developed by the Internet Engineering Task Force (IETF) in order to
provide an efficient communication. Nevertheless, NEMO still suffers from some limitations, especially in case
of nested mobile network. This paper presents new route optimization scheme for nested mobile network using
hierarchical structure with Binding Update Tree (BUT). This framework should reduce packet overhead, handoff
latency, packet transmission delay and achieve optimal routing. Lastly, this paper will compare analytically
between bi-directional tunnelling used by NEMO BS and route optimization of the proposed scheme.
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