Enabling Large Data Transfers on Dynamic, Very High-Speed Network Infrastructures

High-speed networks are being built using the most upto- date networking technologies such as optical fibers with dense wavelength multiplexing (DWDM) in order to meet the performance constraints of large scientific problems (grid infrastructures) or new multimedia applications. As technologies are moving forwards, many high-speed network infrastructures have amazing capabilities in the order of several gigabits/s. Our work focuses on very dynamic high-speed environments where the available besteffort bandwidth for regulated traffics can vary over time. Foreseen problems introduced by such highly dynamic environments are inefficiency due to convergence time and high amount of packet losses due to dramatic reductions of the available bandwidth. In a previous study, we proposed the XCP-r protocol which is a more robust XCP-based transport protocol. In this paper, we present simulation results comparing XCP-r, XCP, TCP (NewReno) and HSTCP for large data transfers on very dynamic high-speed networks. We show that XCP-r succeeds in providing a high level of performance thus able to function in a broader range of network conditions.