ISSN : 1796-2021
Volume : 1    Issue : 5    Date : Auguest 2006

A Multicast Transport Protocol Design Methodology: Analysis, Implementation and Performance Evaluation
Pilar Manzanares-Lopez, Juan Carlos Sanchez-Aarnoutse, Josemaria Malgosa-Sanahuja and Joan Garcia-Haro
Page(s): 39-49
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In this paper, we propose and analyze a multicast application called SOMA (SynchrOnous Multicast Application)
which offers multicast file transfer service in an asymmetric intra-campus environment (several interconnected
wired and wireless LAN networks interconnected through few routers).
For efficient bandwidth utilization, SOMA transmits IP packets by using multicast addressing. We also propose a
complete multicast transport protocol involving both, the flow and error correction algorithms. The protocol adapts
the window size and the overall application transfer bitrate to the minimum network capacity, allowing synchronism
and reacting quickly when congestion arises at any network router.
The application behavior has been tested by simulation in a mixture of wired and wireless intra-campus networks,
and intensively studied by experimentation in an intra-campus environment composed of a wired Fast Ethernet
and a wireless 802.11b Ethernet connected through an Access Point router. In addition, we develop a
mathematical model to validate analytically the most important protocol parameters. The methodology employed
to define, analyze and evaluate this multicast protocol is, indeed, another contribution of the work and can be easily
extended to other multicast protocols.

Index Terms
Multicast, flow and congestion control, transport protocol.