Abstract
In this paper, we propose an Internet Protocol (IP) resource-sharing framework (IRSF) for the UltraFlow access network that provides dual-mode service, i.e., optical IP and Flow, to the end-users. As part of IRSF, the service selector offloads a proportion of a Flow file to the underutilized IP channel, whenever such resource sharing improves Flow service delay. Simulation results indicate a maximum 25% decrease in Flow service delays achieved by IRSF in an UltraFlow access network with a single IP channel. The impact of Flow-over-IP (FoIP) transmission on regular IP traffic is found to be marginal. In the case that wavelength division multiplexing (WDM) is enabled for IP service in the UltraFlow access network, a FoIP-aware wavelength assignment algorithm is proposed to improve the Flow service delay by 25% under heavy Flow traffic. The dependence of , a parameter used by IRSF for performance tuning, on various traffic loads and UltraFlow system settings has been studied via extensive simulations. An automatic optimization algorithm is proposed to optimize in the presence of time-varying IP traffic. The performance of IRSF has also been experimentally verified on our UltraFlow access testbed.
© 2015 Optical Society of America
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