Number of wavelengths required for constructing optical path network considering restoration

Hamazumi, Y.; Nagatsu, Naohide; Okamoto, Satoru; Sato, Ken-ichi

doi:10.1002/ecja.4410780703

Cited by 5 publications

(9 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ratios of the number of wavelengths for a 15-node mesh network obtained by Nagatsu et al [40] are 15-20% with WT networks and about 40% with WNT networks. Simulation studies for a polygrid network have shown that the ratio decreases with the network size, largely due to increased wavelength reusability in different parts of the network as the number of nodes increases [41]. Studies for other networks such as the European optical network with 19 nodes, ARPANET with 20 nodes, and NSFNet with 14 nodes produced similar results [43], [47].…”

Section: Transport Network Restorationmentioning

confidence: 77%

“…These comparisons were made for centralized and preplanned restoration algorithms, and the number of wavelengths required for 100% protection against single-link failures with and without wavelength converters are computed [40], [41], [43], [47]. The heuristic WDM network design algorithms in these studies have been extended to design networks with excess resources for restoration.…”

Section: Transport Network Restorationmentioning

confidence: 99%

See 1 more Smart Citation

Performance of WDM transport networks

Karasan

Ayanoğlu²

1998

IEEE J. Select. Areas Commun.

View full text Add to dashboard Cite

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.

show abstract

Section: Transport Network Restorationmentioning

confidence: 77%

Section: Transport Network Restorationmentioning

confidence: 99%

Performance of WDM transport networks

Karasan

Ayanoğlu²

1998

IEEE J. Select. Areas Commun.

View full text Add to dashboard Cite

show abstract

“…This is called the routing and wavelength assignment (RWA) problem [7], [8]. To solve the RWA problem, several heuristic algorithms were discussed [9]- [11]. In WP networks, the complex RWA should be solved since it requires wavelength continuity restriction, while it relaxes the complexity of OXC node structure [6], [7], [12] as it requires small size all optical switching systems.…”

Section: Path Networkmentioning

confidence: 99%

“…Point-to-point optical transmission evolved into optical routing using OXC/ROADM in the early 1990's [12]- [15], [85]. At that time the number of available WDM wavelengths per fiber was relatively small, [8][9][10][11][12][13][14][15][16], and hence PLC devices were utilized. Later, as available wavelengths per fiber increased, the PLC was replaced by WSSes based on 3-dimensional spatial optics.…”

Section: Future Directions On Optical Networkingmentioning

confidence: 99%

Optical Networking Paradigm: Past, Recent Trends and Future Directions

Oki

Wada

Okamoto

et al. 2017

IEICE Trans. Commun.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…A majority of RWA studies are based on unrealistic assumptions about network-layer [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] on the one hand, such as unlimited capacity in each fiber, unlimited network equipment capacity and so on, and ignoring cost considerations on the other hand. In addition, paying no attention to the effects of transmission impairments on the signal quality, these studies assume that the physical-layer is an ideal one, permitting error free data signal transmission.…”

Section: Introductionmentioning

confidence: 99%

Static Routing Considering Network-layer and Physical-layer in Wavelength-Routed Optical Networks

Karimiyan-Mohammadabadi

Samiei

2007

The 9th International Conference on Advanced Communication Technology

View full text Add to dashboard Cite

Routing and wavelength assignment, known as RWA problem, is an important issue for cost effective utilization of network resources, in wavelength-routed optical networks. Solving the RWA problem considering all constraints of network and physical-layers, simultaneously, is a big challenge. To this time only some of these constraints have been taken into account. Herein, a new static routing approach is developed considering both the network-layer and the physical-layer constraints. The proposed approach consists of a comprehensive cost model and an efficient routing algorithm. Routing algorithm performance is measured in terms of resource utilization, and convergence rate under different conditions.

show abstract

Number of wavelengths required for constructing optical path network considering restoration

Abstract: Key words: Optical network; optical path; wavelength division multiplexing; failure restoration. 30ISSN8756-662 1 /95/0007-0030

Cited by 5 publications

References 3 publications

Performance of WDM transport networks

Performance of WDM transport networks

Optical Networking Paradigm: Past, Recent Trends and Future Directions

Static Routing Considering Network-layer and Physical-layer in Wavelength-Routed Optical Networks

Contact Info

Product

Resources

About