A combined intra-domain and inter-domain QoS routing model for optical networks

Abstract

� Abstract—Inter-Domain Quality of Service (QoS) Routing has become a strong requirement in the present Internet, and this requirement will also be present in the Next Generation Optical based worldwide network. At present end-to-end QoS Routing (QoSR) represents a complex problem mainly because the de-facto standard Inter-domain routing protocol, namely the Border Gateway Protocol (BGP) has not inbuilt QoSR capabilities. Moreover, BGP entirely obscures the availability of Intra-Domain resources in any transit domain within an end-to-end Inter-Domain path, which shifts any tentative proposal to cope with the issue of Inter-Domain QoSR even farther from optimality. Given that Inter-Domain routing in Optical Networks is an active research area in this moment, it seems wise to address the issue of QoSR provisioning from its very foundations. Thus, in this paper we introduce a Combined Intra-Domain and Inter-Domain QoSR Model for Optical Networks. Our goal is to provide a highly efficient coupling between both routing schemes with the aim that the combined QoSR model could be able to supply multiconstrained end-to-end optical paths closer to optimality.