JOURNAL OF COMMUNICATIONS (JCM)
ISSN : 1796-2021
Volume : 3    Issue : 1    Date : January 2008

Emulation of Radio Access Networks to Facilitate the Development of Distributed Applications
Tim Seipold
Page(s): 1-11
Full Text:
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Abstract
Emulation of Radio Access Networks is a valuable tool for the development of distributed
applications incorporating mobile terminals. The network simulator ns–2 provides mechanisms to
route live network traffic through its simulation and thus emulate a network in real-time. However, it
lacks certain core features for the emulation of networks with mobile terminals: roaming of
terminals across base stations, dynamic addressing of nodes, and the export of these changes to
the outside application to evaluate its capabilities in dealing with these consequences of terminal
mobility. To enable this, a new set-up for emulation is proposed and implemented using ns–2. An
infrastructure routing protocol (INFRA) is presented, as well as an additional TAP network object
and a TAP agent that were required to unleash the full potential of the new routing protocol. The
results of several experiments applying these new components expose the added value of the new
emulation setup for the evaluation of distributed applications.

Index Terms
network emulation, Radio Access Networks, wireless, roaming, DHCP, ns–2