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Titolo:
Regenerator placement algorithms for connection establishment in all-optical networks
Autore:
Kim, SW; Seo, SW;
Indirizzi:
Seoul Natl Univ, Sch Elect Engn, Seoul 151742, South Korea Seoul Natl Univ Seoul South Korea 151742 Engn, Seoul 151742, South Korea
Titolo Testata:
IEE PROCEEDINGS-COMMUNICATIONS
fascicolo: 1, volume: 148, anno: 2001,
pagine: 25 - 30
SICI:
1350-2425(200102)148:1<25:RPAFCE>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
WAVELENGTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, SW Seoul Natl Univ, Sch Elect Engn, POB 34, Seoul 151742, South KoreaSeoul Natl Univ POB 34 Seoul South Korea 151742 1742, South Korea
Citazione:
S.W. Kim e S.W. Seo, "Regenerator placement algorithms for connection establishment in all-optical networks", IEE P-COMM, 148(1), 2001, pp. 25-30

Abstract

In wavelength-routed all-optical networks, signals are transmitted on a direct optical path, or a lightpath, in a single-hop manner without opto-electronic/electro-optic (OE/EO) conversion at intermediate nodes. However, dueto the physical constraints of optical elements such as ASE noise and crosstalk. signals can be degraded on a long path. To establish a connection under such impairments, the optical signal mag; need to be regenerated at intermediate nodes, dividing a lightpath into two or more fragments. However, since signal regeneration at intermediate nodes requires additional networkresources, the selection of these nodes should be made carefully to minimise blocking of other lightpaths. The problem of establishing a lightpath ina multihop manner under physical constraints is considered. The authors provide both minimal-cost and heuristic algorithms for locating signal regeneration nodes (SRNs). For a minimal-cost algorithm, the problem is formulated using dynamic programming (DP) such that blocking of other lightpaths dueto the lack of transmitters:receivers (TXs/RXs) and wavelengths is minimised throughout the network. The blocking performances of the algorithms are compared with several other algorithms in a ring network.

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Documento generato il 23/09/20 alle ore 13:00:04