Optical path layer technologies to enhance B-ISDN performance

Sato, Ken-ichi; Okamoto, Satoru; Hadama, Hisaya

doi:10.1109/icc.1993.397500

Cited by 46 publications

(15 citation statements)

References 24 publications

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“…The maximum number of WDM wavelengths per fiber now exceeds one hundred, and the maximum channel speed of 40 Gb/s are now being intruduced. The key enabling technologies that enhance node throughput and cost reduction, recognized to be optical path technologies [1]- [3], exploit wavelength routing. Wavelength routing using ROADMs (Reconfigurable Optical Add/Drop Multiplexers) has recently been introduced and a large scale deployment is being conducted in North America to develop cost-effective networks [4], [5].…”

Section: Introductionmentioning

confidence: 99%

“…The digital path concept essentially reached fruition with the invention of SDH (Synchronous Digital Hierarchy) and the hierarchical digital path technology formed the basis of modern telecommunications networks. The optical realization of the path concept utilizing wavelength routing [17]- [19] has been intensively investigated since the early 1990's [1]- [3] and practical implementation [7]- [9] and commercial application started very recently as mentioned above. Some early considerations of the hierarchical optical path were seen in the late 1990's [12].…”

Section: Introductionmentioning

confidence: 99%

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Prospects and Challenges of Multi-Layer Optical Networks

Sato¹,

Hasegawa²

2007

IEICE Transactions on Communications

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SUMMARYThis paper investigates the prospects and challenges of hierarchical optical path networks. The merits and issues of introducing higher order optical paths are elucidated. State of the art of the key enabling technologies are demonstrated including hierarchical optical cross-connect switch architectures, hierarchical optical path network design algorithms, a newly developed waveband filter, and waveband conversion technologies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prospects and Challenges of Multi-Layer Optical Networks

Sato¹,

Hasegawa²

2007

IEICE Transactions on Communications

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“…Although in this paper we conclude that the blocking performance versus utilization advantages of wavelength conversion are limited, there may be advantages to having wavelength conversion in the network for simplifying operation, administration, and management (OAM) [19]- [21]. Although there exist several candidate technologies to implement optical wavelength converters without any electrical conversions, all of these technologies are currently at the stage of development.…”

Section: A Wavelength Conversionmentioning

confidence: 99%

Performance of WDM transport networks

Karasan

Ayanoğlu²

1998

IEEE J. Select. Areas Commun.

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Abstract-Wavelength division multiplexed point-to-point transport is becoming commonplace in wide area networks. With the expectation that the next step is end-to-end networking of wavelengths (in the optical domain without conversion to electronics), there is a need for new design techniques, a new understanding of the performance issues, and a new performance evaluation methodology in such networks. This paper describes approaches to that end, summarizes research results, and points to open problems.

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“…Two optical path categories have been proposed [5], [6]. One is a wavelength path (WP), which assigns the same wavelength along with the optical path route.…”

Section: Path Networkmentioning

confidence: 99%

“…To solve this problem, an optical path concept was proposed [5], [6]. In an optical path network, each wavelength of WDM channel is defined as an optical path and an optical XC (OXC) is introduced to accommodate optical paths into WDM transmission lines.…”

Section: Path Networkmentioning

confidence: 99%

Optical Networking Paradigm: Past, Recent Trends and Future Directions

Oki

Wada

Okamoto

et al. 2017

IEICE Trans. Commun.

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SUMMARY This paper presents past and recent trends of optical networks and addresses the future directions. First, we describe path networks with the historical backgrounds and trends. path networks have advanced by using various multiplexing technologies. They include time-division multiplexing (TDM), asynchronous transfer mode (ATM), and wavelengthdivision multiplexing (WDM). ATM was later succeeded to multi-protocol label switching (MPLS). Second, we present generalized MPLS technologies (GMPLS). In GMPLS, the label concept of MPLS is extended to other labels used in TDM, WDM, and fiber networks. GMPLS enables network operators to serve networks deployed by different technologies with a common protocol suite of GMPLS. Third, we describe multi-layer traffic engineering and a path computation element (PCE). Multi-layer traffic engineering designs and controls networks considering resource usages of more than one layer. This leads to use network resources more efficiently than the single-layer traffic engineering adopted independently for each layer. PCE is defined as a network element that computes paths, which are used for traffic engineering. Then, we address software-defined networks, which put the designed network functions into the programmable data plane by way of the management plane. We describe the evaluation from GMPLS to software defined networking (SDN) and transport SDN. Fifth, we describe the advanced devices and switches for optical networks. Finally, we address advances in networking technologies and future directions on optical networking.

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Optical path layer technologies to enhance B-ISDN performance

Cited by 46 publications

References 24 publications

Prospects and Challenges of Multi-Layer Optical Networks

Prospects and Challenges of Multi-Layer Optical Networks

Performance of WDM transport networks

Optical Networking Paradigm: Past, Recent Trends and Future Directions

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