Wavelength reuse scheme in a WDM unidirectionalring network using a proper fibregrating add/drop multiplexer

Chawki, M.J.; Boj, S.; Tholey, V.; Gay, E.; Delevaque, E.

doi:10.1049/el:19950335

Cited by 16 publications

(3 citation statements)

References 4 publications

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“…Multirings or Multichannel rings are considered an attractive architecture for all-optical LANs and MANs [8,10,12,17,20,21]. The available transmission resources are partitioned in a number of channels operated in a slotted fashion.…”

Section: Slotted Wdm Ringsmentioning

confidence: 99%

Variable-Size Packets in Slotted WDM Ring Networks

Bianco

Bonsignori

Leonardi

et al. 2003

Next Generation Optical Network Design and Modelling

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Slotted WDM rings are considered to implement high-speed all-optical metro networks. The usual approach to transfer variable-size data units, such as IP datagrams, is to segment them into cells, and transfer each cell independently in the WDM ring. This approach entails complexity due to segmentation/reassembly procedures. We investigate in this paper architectures and control strategies to guarantee that all segments of a variable-size packet are sent contiguously on the ring, thereby drastically reducing reassembly complexity. Our proposal is based on register insertion techniques exploiting optical delay lines. A number of schemes are proposed, and compared by means of simulation, showing how performance impairments can be traded with hardware complexity.

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Section: Slotted Wdm Ringsmentioning

confidence: 99%

Variable-Size Packets in Slotted WDM Ring Networks

Bianco

Bonsignori

Leonardi

et al. 2003

Next Generation Optical Network Design and Modelling

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“…Multi-carrier distribution in a WDM network is a promising approach to simplify network wavelength management. So far, various types of multi-carrier distributed networks have been reported for not only regional and metro networks [9]− [11], but also access networks [12], [13].…”

Section: Introductionmentioning

confidence: 99%

“…The dropping of a carrier wavelengths means that it is virtually stripped from the multi-carrier signal and so cannot be utilized by other nodes in the network. One solution is to add light sources [9] and MCLSs [11] to each access node. This approach, however, dramatically increases cost and power consumption.…”

Section: Introductionmentioning

confidence: 99%

Multi-Carrier Distributed WDM Ring Network Based on Reconfigurable Optical Drop-Add-Drop Multiplexers and Carrier Wavelength Reuse

Matsuura

Oki

2010

2010 IEEE International Conference on Communications

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This paper presents and experimentally demonstrates a multi-carrier distributed wavelength-divisionmultiplexing (WDM) ring network based on reconfigurable optical "drop-add-drop" multiplexers for regional and metro network applications. In the "drop-add-drop" network, optical carriers generated by a centralized multi-carrier light source (MCLS) are "dropped" at the source nodes and used for uplink transmission. Data are "added" to the network by external modulation of one or more carriers. Data are then "dropped" at the destination nodes. The reconfigurable optical add/drop multiplexer (ROADM) at each access node is not only used to "add" and "drop" data, but also to "drop" carriers, which eliminates the many distributed laser-diodes used in the conventional network. In this work, we successfully demonstrate, for the first time, a "drop-add-drop" network experiment offering 10 Gbit/s WDM transmission. Moreover, to dramatically improve the utilization efficiency of the carrier wavelengths distributed by the MCLS in the "drop-add-drop" network, we introduce the carrier wavelength reuse technique which sets the carrier extraction circuits in each access node. This technique enables us to reuse the carrier wavelengths that were already utilized for data transmission between prior source and destination nodes. To evaluate the effect of carrier wavelength reuse, we compare the blocking probabilities of the "drop-add-drop" networks with and without carrier wavelength reuse. The results show that wavelength reuse dramatically reduced the blocking probability. In addition, we numerically analyze the advantages of the "drop-add-drop" network over the conventional ROADM network in terms of network cost and power consumption.

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