Research Article
Multilayer Traffic Engineering and DiffServ in the Next Generation Internet
@INPROCEEDINGS{10.1109/COMSWA.2008.4554480, author={Walter Colitti and K. Steenhaut and Ann Now\^{e}}, title={Multilayer Traffic Engineering and DiffServ in the Next Generation Internet}, proceedings={3rd International ICST Conference on COMmunication System SoftWAre and MiddlewaRE}, publisher={IEEE}, proceedings_a={COMSWARE}, year={2008}, month={6}, keywords={ASON GMPLS MTE DiffServ virtual topology reconfiguration fairness.}, doi={10.1109/COMSWA.2008.4554480} }- Walter Colitti
K. Steenhaut
Ann Nowé
Year: 2008
Multilayer Traffic Engineering and DiffServ in the Next Generation Internet
COMSWARE
IEEE
DOI: 10.1109/COMSWA.2008.4554480
Abstract
The Automatically Switched Optical Networks (ASONs) and the Generalized Multi Protocol Label Switching (GMPLS) control plane are envisaged to play an important role in the next generation Internet. ASON/GMPLS networks enable the Multilayer Traffic Engineering (MTE) paradigm which facilitates the interaction between IP and Dense Wavelength Division Multiplexing (DWDM) layers. In such dynamic scenario the lightpaths are considered to be on-demand services rather than static aggregation core pipes and therefore the QoS and the service differentiation (DiffServ) are issues to be addressed in both IP and optical layer and preferably in an integrated fashion. This paper proposes a DiffServ scheme for ASON/GMPLS networks which logically divides the IP/MPLS virtual topology into two virtual topologies used to carry high priority and low priority traffic, respectively. The control plane uses different routing/grooming and topology reconfiguration strategies offering more stability – and therefore strict QoS commitments - to the topology carrying high priority traffic. The fairness problem is also addressed by defining a parameter that allows the operator to control the quantity of resources assigned to the two virtual topologies. The performance of the proposed scheme has been evaluated by means of a simulation study.
