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WDM Ring Networks Introduction and Fairness Issue Speaker: Date:2010/11/19 1

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Outline 2 Introduction Optical Networks WDM WDM Ring Network WDM Slotted Ring Network Fairness Issue and Solutions Conclusion Future Works References

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Optical Networks Intro 3 1960s 1000 dB/km 1980s 0.2 dB/km Active optical network; AON Passive optical network; PON EPON (Ethernet PON) GPON (Gigabit PON)

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Optical Networks Intro (Space Division multiplexing; SDM) (Time division multiplexing; TDM) (Wavelength division multiplexing; WDM) 4

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WDM (Wavelength Division Multiplexing) 5 WDM

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WDM 6 WDM (1310,1550nm) 160 10 Gbit/s WDM 1.6 Tbit/s DWDM (Dense Wavelength-Division Multiplexing) EDFA( ) 4~8 , 160 < 0.8 nm ( EDFA 1550 nm ) CWDM (Coarse Wavelength Division Multiplexing) > 20 nm ( 1271~1611 nm ) 4~8 ( DWDM 30%)

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WDM Fixed Transmitter/Receiver ( FT/FR ) Tunable Transmitter/Receiver ( TT/TR ) TT-FR,CFT-FR,FT-TR,FT-CFR C channel ,ex: FT-4FR 7

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Ring Network 8 (Metropolitan Area Network) (Wide Area Network) Ring (Architecture) (Fault Tolerant) (Routing) (Scalable) (Spatial Reuse) Multicast Broadcast

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WDM Ring Network 9 WDM Ring Network Slotted Ring Network WDM Slotted Ring Network Fairness issues and solutions FFR MMR M-ATMR Improve M-FECCA

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Slotted Ring Network( ) 10 ( ) Spatial Reuse

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WDM Slotted Ring Network 11 FT-TR WDM ( )

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First Fit (FF) 12 ( ) Control Slot w mini slot ( )

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First Fit (FF) 13 (TT-FR)

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First Fit with Rotation(FFR) 14 FF (Rotation)

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MMR(Multi-Metaring) 15 FFR MMR Metaring SAT SAT (Quota) MMR SAT SAT w ( ) w SAT

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FFR FF 16 FFR FF 16 16 500 Tt = 6, Ts = T/3 = 2.0 Tc = 2/15= 0.1333 0.1333*7.5 =1

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M-ATMR ( Multi-Asynchronous Transfer Mode Ring) 17 WDM Header Busy Address Address Busy Address Busy Address Reset Reset Reset

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M-ATMR(1) Address Busy Address 18

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M-ATMR(2) 19 Address Busy Address

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M-ATMR(3) 20 BA

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M-ATMR(4) 21 Busy Address

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M-ATMR(5) 22 reset

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M-FECCA (Multi Fair and Efficient Cyclic Control Algorithm) 23 M-ATMR M-ATMR (busy address) Ring A Ring B Ring A Ring B busy header

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M-FECCA 24 7 2 7 BA=2 0 1 7 2

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M-FECCA M-ATMR 25 24 Windows size (Quota) 24 slots windows size

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M-FECCA M-ATMR 26 windows size M-FECCA window size M-FECCA M-ATMR window size M-ATMR

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Conclusion 27 FFR MMR FFR MMR M-FECCA

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WDM WDM 28

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Future work 29 WDM WDM

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References 30 [1] C. H. Yeh, C. W. Chow, PHYSICS BIMONTHLY, The Physical Society of Republic of China (Taiwan), p.30,2010 [2] Motorola, Inc, WDM/CWDM/DWDM: Segmentation Primer- Maximizing Capacity for Revenue, White paper, 2008 [3] Photonics Industry & Technology Development Association, , Vol. 11, 1997 [4] Bianco, A., Cuda, D., Finochietto, J., Neri, F., Multi-MetaRing Protocol:Fairness in Optical Packet Ring Networks,IEEE International Conference on Communications, 2007 [5] , , , 1999 [6] , , , 2003 [7] M. Maier Optical Switching Networks, Cambridge University Press, chapter 1, 2008 [8] http://www.cs.nthu.edu.tw/~nfhuang/chap01.htm#1, http://www.cs.nthu.edu.tw/~nfhuang/chap01.htm#1 [9] http://www.csie.mcu.edu.tw/~jerry/net/,Chapter 8-2 http://www.csie.mcu.edu.tw/~jerry/net/

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Q&A Thanks for your attention 31