Learn More
In this paper, we give an overview and classification of optical burst switching schemes and present burst reservation concepts. The performance of various basic reservation mechanisms proposed in literature is compared. Furthermore, a new analysis is introduced that allows to calculate the loss probabilities of a two-class system based on the reservation(More)
At the beginning of the new millenium several trends can be observed in the field of communications networks. First, bandwidth requirement in networks seems to grow without limits. IP (Internet Protocol) based data networks play a central role. This is not only due to the fact that data traffic has surpassed voice traffic but even more due to the(More)
On the way towards an architecture for a new QoS-supporting and scalable Internet, the IP-over-photonics approach seems to be very promising. One possible solution in this domain is optical burst switching (OBS), a concept combining advantages of optical circuit and packet switching. After an introduction to OBS as well as the reservation mechanism(More)
Definition and comparison of QoS metrics for TCP-based IP traffic (elastic traffic) with short TCP connections In this report, we introduce a variety of possible performance measures for elastic traffic and discuss how these measures simplify when they are applied to a processor sharing model and a packet-level model using TCP, respectively. Furthermore,(More)
Years of research on QoS architectures for IP networks have delivered sophisticated proposals, which have nevertheless not found broad commercial use. The reasons are not lack of technical soundness or insurmountable technological complexity, but insufficient attention to other, non-QoS-specific matters. First among them is the lack of a commercialization(More)
Recently, the question has been heavily discussed whether burst assembly in edge nodes of Optical Burst Switching (OBS) networks reduces self-similarity of traffic [1-4]. Our performance evaluation by analysis and simulation shows that in most cases self-similarity remains unchanged. 1.Introduction In the design of next generation IP networks a major(More)
Introduction During the last years, several trends have been evolving that significantly influence the development of network architectures. The first trend that can be observed is the quickly increasing number of users communicating worldwide with each other. Since the available bandwidth grows very fast – caused by the emerging WDM technology (wavelength(More)
Perfection is reached, not when there is no longer anything to add, but when there is no longer anything to take away. Complexity is the primary mechanism which impedes efficient scaling, and as a result is the primary driver of increases in both capital expenditures (CAPEX) and operational expenditures (OPEX). Abstract Whereas it is widely believed that(More)
Kurzfassung Im Beitrag des BMBF Verbundvorhabens TransiNet werden mögliche, auf optische Vermittlung basierende Architekturen für den IP-Transport in zukünftigen Weitverkehrsnetzen identifiziert und Bewertungskriterien für diese Architekturen aufgestellt. Dabei gilt es den zukünftigen Anforderungen, wie wachsende Anzahl von Nutzern, stetig steigendes(More)