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The TCP transport protocol is currently inefficient for high speed data transfers over long distance networks with high bandwidth delay products. The challenge is to develop a protocol which is fast over networks with high band-width delay products, fair to other high volume data streams, and friendly to TCP-based flows. We describe here a UDP based(More)
There is a trend in the research networking community to provide e-Science applications with dedicated connections instead of shared links. Lightpaths are the way to guarantee the appropriate level of service in terms of bandwidth and latency. NDL – Network Description Language – is a data model offering users and providers of lightpaths with a common(More)
Multi-layer networks are computer networks where the configuration of the network can be changed dynamically at multiple layers. However, in practice, technologies at different layers may be incompatible to each other, which necessitates a careful choice of a multi-layer network model. Not much work has been done on path selection in multi-layer networks.(More)
Several research networks around the world are implementing hybrid networks. These networks provide end-users with traditional routed IP services, but also lightpaths. To automate lightpath provisioning, broker systems must have topology information, both intra and inter-domain. This requires that the information is described in a computer-readable format.(More)
Conventions such as iGrid 2005 and SuperComputing show that there is an increasing demand for more service options on networks. For such networks, large teams of experts are needed to configure and manage them. In order to make the full potential of hybrid networks available to the ordinary user, the complexity must be reduced. This paper presents the idea(More)
The goal of the OptIPuter project is to tightly couple research applications with dynamically allocated paths. Since OptIPuter is a multidisciplinary project, the paths through the network often span multiple network domains, and the applications are challenged to find valid network connections through these domains. The challenge arises if the different(More)
We realize an open, programmable paradigm for application-driven network control by way of a novel network plane — the " service plane " — layered above legacy networks. The service plane bridges domains, establishes trust, and exposes control to credited users/applications while preventing unauthorized access and resource theft. The Authentication,(More)
In recent years, dynamic multi-layer networks have emerged. Unlike the regular networks, these multi-layer networks allow users and other networks to interface on different technology layers. While path finding on a single layer is currently well understood , path finding on multi-layer networks is far from trivial. Even the constraints (i.e. possible(More)
Data sets in e-science are increasing exponentially in size. To transfer these huge data sets we need to make efficient use of all available network capacity. This means using multiple paths when available. In this paper a prototype of such a multipath network is presented. Several emerging network technologies are integrated to achieve the goal of(More)