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E. Mobilon, M.R. Salvador,
R. Bernardo,
L.R. Monte,
V.G. Oliveira,
L. Pezzolo,
M.M. Pereira,
A.D. Coral,
M.F.M.B.F. Oliveira,
A. Paradisi,
F. Damiani,
P.J. Tatsch,
M. Mosso,
H.J.P.P. da Silva
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ABSTRACT: This paper describes an innovative packet- switched network architecture hardware prototype, designed and implemented for a proof-of-concept of high-speed optical burst and packet switching applications. Commercially available ASICs and high-density programmable logic devices, with functional blocks implemented in VHDL, were used in the custom-designed boards, built to validate the functionalities of a 3-node network architecture. Computer simulations were also included to verify the network behavior in different traffic scenarios.
Telecommunications Symposium, 2006 International; 10/2006
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ABSTRACT: Ingress nodes of Optical Burst Switching (OBS) networks are responsible for assembling burst out of incoming packets and to forward these bursts into the OBS network. The most common criteria for burst assembly are based either on time or on traffic volume. The change of the statistical characteristics of a traffic stream at an ingress switch can affect the quality of service provisioning. Therefore, the statistical characteristics of the output flow of an ingress node need to be known for appropriate network dimensioning and service provisioning. This paper evaluates the impact of burst assembly mechanisms on the scaling properties of multifractal traffic flows. It is showed that the most relevant factor that determines the nature of the output traffic flow is the relationship between the cut-off time scale of the input traffic and the time scale of assembly threshold.
Communications, 2006. ICC '06. IEEE International Conference on; 07/2006
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ABSTRACT: This paper proposes an access fairness protocol for optical packet-switched wavelength division multiplexing ring networks that employ destination removal for high-performance. The protocol aims at throughput fairness, and it combines cyclic reservations with transmission credit allocations to meet the demands of the nodes and adapt to changes in traffic characteristics dynamically and efficiently.
Communications, 2005. ICC 2005. 2005 IEEE International Conference on; 06/2005
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R.R. Scarabucci,
M.A. Stanton,
M.R.X. de Barros, M.R. Salvador,
S.M. Rossi,
F.D. Simoes,
M.L. Rocha,
I.L. da Silva Neto,
J.B. Rosolem,
T.R.T. Fudoli,
J.M.D. Mendes,
N.F. Castro,
I. Machado,
A.E. Reggiani,
A. Paradisi,
L. Martins
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ABSTRACT: This paper describes Project GIGA-high-speed Experimental Network, a multiinstitutional, multidisciplinary, national project funded by the Brazilian government. The main goal of Project GIGA is to promote research, development and experimentation of technology at all layers, aiming at generating knowledge, products and services that will make it possible for Brazilian individuals and companies to play a role in the converged telecom sector. The project centres on the high-speed Network Testbed, a platform for experimentation and validation of technology, equipment, protocols, services and applications, whether they be developed in the project or not. The paper explains the objectives, the expected impact and the organisation of the project. It also describes the architecture of the network testbed, the ongoing research and development activities and some of the results obtained.
Testbeds and Research Infrastructures for the Development of Networks and Communities, 2005. Tridentcom 2005. First International Conference on; 03/2005
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R. R. Scarabucci,
M. A. Stanton,
M. R. X. de Barros, M. R. Salvador,
S. M. Rossi,
F. D. Sim,
M. L. Rocha,
I. L. da Silva Neto,
J. B. Rosolem,
T. R. T. Fudoli,
J. M. Duarte Mendes,
N. F. Castro,
I. Machado,
A. E. Reggiani,
A. Paradisi,
L. Martins
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ABSTRACT: This paper describes Project GIGA - High-speed Experimental Network, a multi-institutional, multidisciplinary, national project funded by the Brazilian government. The main goal of Project GIGA is to promote research, development and experimentation of technology at all layers, aiming at generating knowledge, products and services that will make it possible for Brazilian individuals and companies to play a role in the converged telecom sector. The project centres on the High-speed Network Testbed, a platform for experimentation and validation of technology, equipment, protocols, services and applications, whether they be developed in the project or not.
Testbeds and Research Infrastructures for the Development of Networks & Communities, International Conference on. 02/2005;
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ABSTRACT: Packet-switched ring networks usually employ destination removal to exploit spatial reuse and, hence, to achieve high performance. By promoting spatial reuse, destination removal may lead to unfair access to the medium and, consequently, to unbalanced use of resources and even to node starvation. This paper introduces LCR-SD, a novel access fairness protocol for high-performance packet ring networks. LCR-SD promotes throughput fairness among flows, and it is simple and adaptive to dynamic changes in traffic patterns. This paper also analyzes the performance of LCR-SD and its impact on TCP fairness.
Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE;
