Modelling, Simulation And Performance Analysis Of An Improved R-IWDMTC Protocol For Optical Internet Backbone
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Date
2004-04
Authors
Hashim, Eddie Irawan
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Abstract
The advance of optical network and the mature of network protocol technologies make real
time application (RTA) data forwarding possible and reliable to deploy over Internet. At
the same time, Wavelength Division Multiplexing (WDM) technique as second generation
of optical network technolog.ie s has potential to be manipulated wisely to enhance network
utilisation and capacity. Optical network via Optical Internet or Internet Protocol (IP) over
WDM technology allows IP data being forwarded efficiently. This study proposed
improved algorithms, schemes and techniques upon the existing Optical Internet protocol to
provide better IP transmission for real time application data. Receiver-initiated WDM Tree
Construction (R-IWDMTC) protocol was introduced by Salvador et af. (Extended via
Multi-protocol Label Switching (MPLSĀ» provides connection-oriented setup and multicast
tree construction control for Optical Internet. This study proposed and evaluated an
improved R-IWDMTC protocol in terms ofRTA link setup and data forwarding. Modified
R-IWDMTC protocol was improved by providing the QoS setup via Bandwidth
Assignment Scheme (BandAS) and Buffer Assignment Scheme (Buff AS) including some
error control techniques such as Wavelength Splitting Control (WSC) and Bandwidth
Assignment Policy Control (BAPC) (Service Level Agreement (SLA) admission control).
Also, modified R-IWDMTC protocol was improved by providing loss avoidance when
light of loss (LOL) occurs via Fast Re-switched Mechanism \vith Sequential Algorithm
(FRM-SA) lambda switching technique. Discrete event simulator called OMNeT++ is used
for modelling and analysis the Optical Internet backbone with modified R-IWDMTC
protocol. From data collected, the modified R-IWDMTC protocol with BandAS and
Buff AS provides },etter DiffServ and IntServ in the Optical Internet backbone area by using
per-flow and per-queue threshold concepts. Based on the study using smaller packet for
video (below than 800Btye per packet stream) and voice (below than 480Btye per packet
stream) forwarding provides high performances (low latency (below than 125ms and
lS0ms), low jitter (below than 20ms and SOms) and no losses (0% of packet lossĀ».
Modified R-IWDMTC protocol via FRM-SA also prevents losses when LOL occurs
between each peer of optical nodes.
Description
Keywords
Modelling, Simulation And Performance Analysis , Protocol For Optical Internet