-
D. Apostolopoulos,
P. Zakynthinos,
L. Stampoulidis,
E. Kehayas,
R. McDougall,
R. Harmon,
A. Poustie,
G. Maxwell, R. Van Caenegem,
D. Colle,
M. Pickavet,
E. Tangdiongga,
H.J.S. Dorren,
H. Avramopoulos
[show abstract]
[hide abstract]
ABSTRACT: We demonstrate a photonic routing system that resolves the contention between bursty optical packets. The circuit is realized exclusively with integrated photonic components through the interconnection of semiconductor optical amplifier Mach-Zehnder interferometers gate arrays and optical flip-flops. The system resolves the contention - without burst segmentation - in the wavelength domain with a low power penalty ( < 1 dB).
IEEE Photonics Technology Letters 01/2009; · 2.19 Impact Factor
-
P. Zakynthinos,
D. Apostolopoulos,
L. Stampoulidis,
E. Kehayas,
A. Poustie,
G. Maxwell, R. Van Caenegem,
D. Colle,
M. Pickavet,
E. Tangdiongga,
H.J.S. Dorren,
H. Avramopoulos
[show abstract]
[hide abstract]
ABSTRACT: We demonstrate an intelligent routing system through the interconnection of 8 optical gates. Contention resolution of bursty packets using integrated MZIs and flip-flops is reported with <1dB power penalty.
Optical Communication, 2008. ECOC 2008. 34th European Conference on; 10/2008
-
[show abstract]
[hide abstract]
ABSTRACT: All-optical label swapping (AOLS) forms a key technology towards the implementation of all-optical packet switching nodes (AOPS) for the future optical Internet. The capital expenditures of the deployment of AOLS increases with the size of the label spaces (i.e. the number of used labels), since a special optical device is needed for each recognized label on every node. Label space sizes are affected by the way in which demands are routed. For instance, while shortest-path routing leads to the usage of fewer labels but high link utilization, minimum interference routing leads to the opposite. This paper studies all-optical label stacking (AOLStack), which is an extension of the AOLS architecture. AOLStack aims at reducing label spaces while easing the compromise with link utilization. In this paper, an integer lineal program is proposed with the objective of analyzing the softening of the aforementioned trade-off due to AOLStack. Furthermore, a heuristic aiming at finding good solutions in polynomial-time is proposed as well. Simulation results show that AOLStack either a) reduces the label spaces with a low increase in the link utilization or, similarly, b) uses better the residual bandwidth to decrease the number of labels even more.
INFOCOM 2008. The 27th Conference on Computer Communications. IEEE; 05/2008
-
[show abstract]
[hide abstract]
ABSTRACT: Recent advances in the all-optical signal processing domain report high-speed and nontrivial functionality directly implemented in the optical layer. These developments mean that the all- optical processing of packet headers has a future. In this article we address various important control plane issues that must be resolved when designing networks based on all-optical packet-switched nodes.
IEEE Communications Magazine 12/2007; · 3.79 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: New services and high bandwidth demanding applications will dramatically change the operator's requirements with respect to future network architectures and topologies. The advent of bandwidth-intensive video applications will stimulate the design of high throughput and flexible network architectures. In this network evolution All-optical Label Swapping (AOLS) can play a key role. AOLS is a key functional type of optical burst/packet switching that intends to solve the potential mismatch between fibre capacity and routing burst forwarding capacity. This paper discusses how the original AOLS-node can be adapted to be more scalable. The new node designs are based on wavelength striping and the use of one control wavelength which transports only the labels. Then, for the remaining data wavelengths (transport of payloads), AOLS-blocks with limited intelligence can be installed.
Transparent Optical Networks, 2007. ICTON '07. 9th International Conference on; 08/2007
-
[show abstract]
[hide abstract]
ABSTRACT: In this paper, a technoeconomical study of several (optical) packet-switching node architectures is described. Therefore, different architectures proposed in IST-WASPNET and IST-LASAGNE projects as well as a standard optical circuit switching approach are considered, and their economical impact is estimated by means of cost comparisons between the different technologies. The switching architectures all use optical fiber as a transport medium, but each of them uses a different technology to process switching. Their cost is evaluated as a function of most characteristic parameters for each technology. In the all-optical approaches, the main cost is that related to the fiber assembly, whereas for electronic processing, the most expensive cost is related to the optical-electronic-optical (OEO) conversions. The results show that the integration of optical components is crucial to make all-optical packet-switching nodes feasible.
Journal of Lightwave Technology 05/2006; 24(4):1638- 1645. · 2.78 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: In this paper we discuss the node architecture costs of two all-optical packet switching nodes, a node with electronic header processing and the IP over WDM approach. We compare the costs for increasing network traffic.
Optical Fiber Communication Conference, 2006 and the 2006 National Fiber Optic Engineers Conference. OFC 2006; 04/2006
-
F Ramos,
E. Kehayas,
J.M. Martinez,
R. Clavero,
J. Marti,
L. Stampoulidis,
D. Tsiokos,
H. Avramopoulos,
J Zhang,
P.V. Holm-Nielsen, [......],
N. Yan,
I.T. Monroy,
A.M.J. Koonen,
M.T. Hill,
Y Liu,
H.J.S. Dorren, R. Van Caenegem,
D. Colle,
M. Pickavet,
B. Riposati
[show abstract]
[hide abstract]
ABSTRACT: The Information Society Technologies-all-optical LAbel SwApping employing optical logic Gates in NEtwork nodes (IST-LASAGNE) project aims at designing and implementing the first, modular, scalable, and truly all-optical photonic router capable of operating at 40 Gb/s. The results of the first project year are presented in this paper, with emphasis on the implementation of network node functionalities employing optical logic gates and optical flip-flops, as well as the definition of the network architecture and migration scenarios.
Journal of Lightwave Technology 11/2005; 23(10):2993- 3011. · 2.78 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: All optical label swapping (AOLS) is a promising packet switching technology as it intends to solve the potential mismatch between fibre capacity and router packet forwarding capacity. In this paper we investigate how the use of all-optical label swapping in an optical packet switching network creates some challenges from the node dimensioning point of view. To lower the cost of the AOLS-node, it is beneficial to reduce the number of different labels used throughout the network and hence the number of bits occupied by the label. To this purpose label stripping, a label switching strategy based on stripping of local labels is proposed. In this paper we compare label stripping to label swapping from the point of node dimensioning and we will map the impact of other network parameters on the AOLS node dimensions.
Transparent Optical Networks, 2005, Proceedings of 2005 7th International Conference; 08/2005
-
C. Develder,
A. Stavdas,
A Bianco,
D. Careglio,
H. Lnsethagen,
J.P.F.-P. Gimenez, R. Van Caenegem,
S. Sygletos,
F. Neri,
J. Sole-Pareta,
M. Pickavet,
N. Le Sauze,
P. Demeester
[show abstract]
[hide abstract]
ABSTRACT: Optical packet switching (OPS) has been proposed as a strong candidate for future metro networks. This paper assesses the viability of an OPS-based ring architecture as proposed within the research project DAVID (Data And Voice Integration on DWDM), funded by the European Commission through the Information Society Technologies (IST) framework. Its feasibility is discussed from a physical-layer point of view, and its limitations in size are explored. Through dimensioning studies, we show that the proposed OPS architecture is competitive with respect to alternative metropolitan area network (MAN) approaches, including synchronous digital hierarchy, resilient packet rings (RPR), and star-based Ethernet. Finally, the proposed OPS architectures are discussed from a logical performance point of view, and a high-quality scheduling algorithm to control the packet-switching operations in the rings is explained.
Journal of Lightwave Technology 12/2004; 22(11):2435- 2451. · 2.78 Impact Factor
-
C. Raffaelli,
K. Vlachos,
N. Andriolli,
D. Apostolopoulos,
J. Buron, R. van Caenegem,
G. Danilewicz,
J.M. Finochietto,
J. Garcia-Haro,
D. Klonidis, [......],
A. Pattavina,
P. Pavon-Marino,
S. Ruepp,
M. Savi,
M. Scaffardi,
I. Tomkos,
A. Tzanakaki,
L. Wosinska,
O. Zouraraki,
F. Neri
Computer Networks. 52(10):1873-1890.
