Résumé de thèse

Ignasi Sau Vallsdirecteurs: David Coudert, Jean-Claude Bermond

Description

Resum´ e´ de these`Ignasi Sau VallsDirecteurs: David Coudert, Jean-Claude BermondMascotte - Boreon´12-13 mars 2009Ignasi Sau Valls (Mascotte) Resum´ e´ de these` 12-13 mars 2009 1 / 28Plan de l’expose´ (et de la these` ..)Partie I: Groupage de traficPartie II: Sous-graphes avec contraintes sur le degre´Partie III: Autres problemes` (plus ou moins relies)´ConclusionsIgnasi Sau Valls (Mascotte) Resum´ e´ de these` 12-13 mars 2009 2 / 28Traffic GroomingIgnasi Sau Valls (Mascotte) Resum´ e´ de these` 12-13 mars 2009 3 / 28General ideaWDM networks (Wavelength Division Multiplexing)I 1 wavelength = up to 40 Gb/sI 1 fiber = hundreds of wavelengths = Tb/sIdea: Traffic grooming consists in grouping low-speed trafficflows into higher speed streams! we allocate the same wavelength to several low-speedrequests (TDM, Time Division Multiplexing)Objectives:I Efficient usage of bandwidthI Minimize network costIgnasi Sau Valls (Mascotte) Resum´ e´ de these` 12-13 mars 2009 4 / 28General ideaWDM networks (Wavelength Division Multiplexing)I 1 wavelength = up to 40 Gb/sI 1 fiber = hundreds of wavelengths = Tb/sIdea: Traffic grooming consists in grouping low-speed trafficflows into higher speed streams! we allocate the same wavelength to several low-speedrequests (TDM, Time Division Multiplexing)Objectives:I Efficient usage of bandwidthI Minimize network costIgnasi Sau Valls (Mascotte) Resum´ e´ de these` 12-13 mars 2009 4 / 28General ideaWDM networks (Wavelength ...

Informations

• Publié par: Mizir
• Nombre de lectures: 53
• Langue: English

Extrait

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R ´ esum ´ edeth ` ese

Ignasi Sau Valls Directeurs:David Coudert, Jean-Claude Bermond

Mascotte-Bor ´ eon

12-13 mars 2009

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PartieII:Sous-graphesaveccontraintessurledegr ´ e

Partie I: Groupage de trafic

Conclusions

PartieIII:Autresprobl ` emes(plusoumoinsreli ´ es)

2/09

Plan de l’expos  ´  ( t  de la the`  se..) e e

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Ignasi

Sau

Valls

(Mascotte)

Traffic

Grooming

Resume ´ ´

de

th ` ese

12-13

mars

2009

3

/

28

m´ed´esute)Rscot(saMaVllSiuangsaI

Objectives: I Efficient usage of bandwidth I Minimize network cost

−→we allocate the same wavelength to several low-speed requests (TDM, Time Division Multiplexing)

General idea

Idea:Traffic groomingconsists in grouping low-speed traffic flows into higher speed streams

WDM networks (Wavelength Division Multiplexing) I 1 wavelength = up to 40 Gb/s I 1 fiber = hundreds of wavelengths = Tb/s

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octtM(salaslaSVunasiIg12se3m-1s2ar9400´R)emuseede´e`ht2/8

Objectives: I Efficient usage of bandwidth I Minimize network cost

General idea

Idea:Traffic groomingconsists in grouping low-speed traffic flows into higher speed streams

−→we allocate the same wavelength to several low-speed requests (TDM, Time Division Multiplexing)

WDM networks (Wavelength Division Multiplexing) I 1 wavelength = up to 40 Gb/s I 1 fiber = hundreds of wavelengths = Tb/s

−→allocate the same wavelength to several low-speedwe requests (TDM, Time Division Multiplexing)

Objectives: I Efficient usage of bandwidth I Minimize network cost

WDM networks (Wavelength Division Multiplexing) I 1 wavelength = up to 40 Gb/s I 1 fiber = hundreds of wavelengths = Tb/s

Idea:Traffic groomingconsists in grouping low-speed traffic flows into higher speed streams

094/28

General idea

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OADM(Optical Add/Drop Multiplexer)= adds-extracts a wavelength from a fiber ADM(Add/Drop Multiplexer)= add-extracts OC/STM (low speed signal) from a wavelength

we want to minimize the number of ADMs

−→

ADM and OADM

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OADM(Optical Add/Drop Multiplexer)= adds-extracts a wavelength from a fiber ADM(Add/Drop Multiplexer)= add-extracts OC/STM (low speed signal) from a wavelength

we want to minimize the number of ADMs

−→

ADM and OADM

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Request(i,j): pair of nodes(i,j)that want to exchange (low-speed) traffic Grooming factor C:

Definitions

Loadof an arc on a wavelength: number of requests using this arc on this wavelength (≤C)

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Definitions

Loadof an arc on a wavelength: number of requests using this arc on this wavelength (≤C)

Request(i,j): pair of nodes(i,j)that want to exchange (low-speed) traffic Grooming factor C:

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Idea:UseADMs only at the endpoints of arequest (lightpaths)to save as many ADMs as possible

OADM(Optical Add/Drop Multiplexer)= adds-extracts a wavelength from a fiber ADM(Add/Drop Multiplexer)= add-extracts OC/STM (low speed signal) from a wavelength

ADM and OADM

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