Synchronisation Issues in Optical Packet Switched Networks

Bostica, B.; Burzio, M.; Gambini, P.; Zucchelli, L.

doi:10.1007/978-1-4471-0979-2_29

Cited by 27 publications

(9 citation statements)

References 5 publications

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“…1; has N Input Fibers (IF) and N Output Fibers (OF), and each fiber supports a WDM signal with M wavelengths: therefore an input (or output) channel is identified by the index pair (i,j), where i (i=0,1,......,N-1) identifies one of the input (or output) fiber and j (j=0,1,......,M-1) identifies one of the wavelengths on that fiber. The operation mode of the architecture is synchronous, meaning that all arriving packets have a fixed size and their arrival on each wavelength is synchronized on a time-slot basis [11], where a time slot is the time needed to transmit a single packet; the synchronization operation is realized by means of synchronizers [13] located at the ingress of the switch after the wavelength demultiplexers. The Switching Fabric reported in Fig.…”

Section: Spof (Shared-per-output Fiber) Wdm Packet Optical Switchmentioning

confidence: 99%

Performance Evaluation of QoS-Aware Optical Packet Switches

Eramo

Listanti

Tiberio

2008

2008 IEEE International Conference on Communications

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In this paper we evaluate the performance of Bufferless Optical Packet Switches equipped with shared Tunable Optical Wavelength Converters (TOWC) and supporting Quality of Service. The TOWCs sharing is partial, that is each Output Fiber shares one pool of TOWCs shared by all of the packets directed to that Output Fiber. The QoS, expressed in terms of Packet Loss Probability, is differentiated by giving the packets different priorities in accessing both the output wavelengths and the TOWCs. A scheduling algorithm is proposed and its complexity is evaluated. The QoS technique effectiveness is studied by means of a sophisticated analytical model validated by simulation results. The results show that the proposed technique to support QoS allows a good differentiation of the QoS offered to the packets

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Section: Spof (Shared-per-output Fiber) Wdm Packet Optical Switchmentioning

confidence: 99%

Performance Evaluation of QoS-Aware Optical Packet Switches

Eramo

Listanti

Tiberio

2008

2008 IEEE International Conference on Communications

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“…The operation mode of the architecture is synchronous, meaning that all arriving packets have a fixed size and their arrival on each wavelength is synchronized on a time-slot basis. The synchronization operation is realized by means of synchronizers [14] located at the ingress of the switch after the wavelength demultiplexers. In the MFSPN switch shown in Fig.1, a bank of r TOWCs is used to wavelength converter the contending packets.…”

Section: The Multi-fiber Shared Per Node (Mfspn)mentioning

confidence: 99%

OPN06-5: Dimensioning of the TOWCs in a Multifiber Optical Packet Switch

2006

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It is cost-effective to install multiple fibers in each link of an all-optical network, because the cost of fibers is relatively low compared with the installation cost. In this paper we propose an architecture of an bufferless multifiber Optical Packet Switch (OPS) using the wavelength dimension for contention resolution. In order to save the number of Tunable Optical Wavelength Converters (TOWC), the proposed architecture shares the TOWCs among the arriving packets. An analytical model, validated by means of simulations, is proposed to evaluate the Packet Loss Probability of the switch. A sensitivity analysis of the TOWCs saving of a multi-fiber switch with respect to a single-fiber switch is carried out as a function of the main switch and the traffic parameters (number of input lines, number of wavelengths per fiber, offered traffic,……). In some cases the saving can reach 50%.

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“…In general, optical packet-switched networks can be divided into two categories: time-slotted networks with fixed-size packets [7] and unslotted networks with fixed-size or variable-size packets [8]. A fair amount of work has been conducted on slotted networks with fixed-length packets, in terms of network architecture and performance [1 3].…”

Section: Introductionmentioning

confidence: 99%

<title>All-optical packet-switched networks: a study of contention-resolution schemes in an irregular mesh network with variable-sized packets</title>

Yao

Mukherjee

Yoo

et al. 2000

OptiComm 2000: Optical Networking and Communications

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This paper presents a comparative study of contention-resolution schemes based on wavelength, time, and space domains in an unslotted optical packet-switched network with a large irregular mesh topology consisted of 15 nodes. For the first time, to the best of our knowledge, we investigated the effect of selective deflection and limited wavelength conversion. Features and performances of different combinational schemes are listed and compared. While simulation results show the effectiveness of wavelength conversion for resolving contentions over optical buffering and space deflection, physical explanations of the different effectiveness in resolving contentions of these schemes are also discussed.

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Synchronisation Issues in Optical Packet Switched Networks

Cited by 27 publications

References 5 publications

Performance Evaluation of QoS-Aware Optical Packet Switches

Performance Evaluation of QoS-Aware Optical Packet Switches

OPN06-5: Dimensioning of the TOWCs in a Multifiber Optical Packet Switch

<title>All-optical packet-switched networks: a study of contention-resolution schemes in an irregular mesh network with variable-sized packets</title>

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