Evaluation of the Route Optimization for NEMO in
Satellite Networks
Abu Zafar M. Shahriar1, Mohammed Atiquzzaman1
and William D. Ivancic2
1School of Computer
Science
University of Oklahoma
Norman, OK 73019-6151, USA
{shahriar,atiq}@ou.edu
2Satellite Networks
and Architectures Branch
NASA Glenn Research Center
Cleveland, OH, USA
wivancic@grc.nasa.gov
Abstract
Network Mobility (NEMO) has been proposed to efficiently
manage the mobility of the group of
hosts that are moving together as a mobile network. NEMO
Basic Support Protocol (BSP) suffers
from the problem of inefficient route. A number of route
optimization schemes have been proposed in
the literature to solve the problem. The schemes are
mainly based on four approaches – Delegation based,
Hierarchical, Source routing and BGP-assisted. The
approaches have been evaluated in the
literature in terms of various performance metrics. The
selection of a route optimization approach for
NEMO in terrestrial networks is straight forward from the
evaluations that implicitly assume NEMO
in such networks. However, the selection of a route
optimization approach requires additional evaluations
for NEMO architecture that has been proposed for
satellite networks to manage the mobility of
Internet Protocol-enabled devices onboard satellites. The
requirement for the additional evaluations
results from the satellite network characteristics, such
as long delay links, the link asymmetry, and
power constraints. In addition, the availability of
multiple connections for mobile networks
in satellite networks requires the use of multihoming, a
feature to support multiple connections in NEMO,
with the route optimization. There are only a few route
optimization schemes that consider multihoming.
In this work, we discuss the desired characteristics of a
route optimization scheme for satellite networks,
and the requirements for incorporating multihoming into
each of the approaches
for the route optimization. Based on the characteristics,
previous evaluations and the requirements for
multihoming, we analyze the approaches to find suitable
route optimization approaches for NEMO
in satellite networks. Results show that delegation-based
and hierarchical approaches are more suitable
for NEMO in satellite networks compared to the other two
approaches.
In addition, the relative advantages and disadvantages
among the approaches are also shown
in terms of the desired characteristics. Thus, our
analysis lays the basis for the future research
to select a suitable scheme for the route optimization in
NEMO for satellite networks.
Keywords: NEMO, route optimization, multihoming
Journal of Wireless Mobile Networks,
Ubiquitous Computing, and Dependable Applications (JoWUA),