ISSN : 1796-2056
Volume : 3    Issue : 1    Date : January 2008

Design and Evaluation of a Novel HIP-Based Network Mobility Protocol
Szabolcs Nováczki, László Bokor, Gábor Jeney, and Sándor Imre
Page(s): 10-24
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The rapid growth of IP-based mobile telecommunication technologies in the past few years has
revealed situations where not only a single node but an entire network moves and changes its point
of attachment to the Internet. The main goal of any protocol supporting network mobility is to provide
continuous, optimal and secure Internet access to all nodes and even recursively nested mobile
subnetworks inside a moving network. For this purpose, the IETF (Internet Engineering Task Force)
has developed the NEtwork MObility Basic Support (NEMO BS) protocol which extends the operation
of Mobile IPv6 (MIPv6). In order to bypass the same problems suffered by MIPv6 and NEMO BS, a
novel Host Identity Protocol (HIP) extension called HIP-NEMO is introduced, proposed and
evaluated in this paper. Our proposal is based on hierarchical topology of mobile RVSs (mRVS),
signaling delegation and inter-mRVS communication to enable secure and efficient network
mobility support in the HIP layer. The method provides secure connectivity and reachability for every
node and nested subnet in the moving network and supports multihomed scenarios as well.
Moreover, HIPNEMO reduces signaling and packet overhead during network mobility management
by achieving route optimization inside any moving network even in nested scenarios. To evaluate
the proposed scheme we present a simulation model implemented in OMNeT++ and discuss the
results of our simulation based analysis to show the efficiency of the approach compared to the
NEMO BS protocol formulated by the IETF.

Index Terms
Host Identity Protocol (HIP), NEtwork MObility (NEMO), multihoming, nested mobile networks, route
optimization, security, HIP-NEMO.