Abstract

In this paper a proposition for a flexible optical access network is presented. The general idea of a physical layer over an existing gigabit passive optical network (GPON) infrastructure is described, and three possible realizations are reported through laboratory experiments and computer simulations. Two algorithms for efficient bandwidth allocation in the time and wavelength domains have been designed, and the results of their application in one realistic scenario are reported. We found that the combined flexibility in the time and wavelength domains may handle burst arrivals in a cost-effective way and may be considered as a viable solution for upgrading optical access networks in the future.

© 2009 Optical Society of America

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References

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  1. ITU-T G.984.3 norm, Gigabit Capable Passive Optical Network, GPON.
  2. IEEE 802.3ah norm, Ethernet Passive Optical Network.
  3. Autorité de Régulation des Communications Electroniques et des Postes, La lettre de l’Autorité, n°53, December 2006.
  4. R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexibility in access networks: a novel WDMA/TDMA scheme for passive optical networks” in Optical Fiber Communication Conf. and Expo. and Nat. Fiber Optic Engineers Conf., 2007, paper JThA77.
  5. R. Glatty, Ph. Guignard, Ph. Chanclou, “A novel TDMA/WDMA optical flexible access network,” in Proc. LASER, Munich, Germany, June 2007.
  6. R. Glatty, Ph. Guignard, Ph. Chanclou, “Throughput optimisation with time and wavelengths flexibility applied to an enlarged PON implementing optical amplification,” in Proc. NOC, Vienna, Austria, July 2008.
  7. R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network,” in Proc. KNS, Wroclaw, Poland, May 2007.
  8. R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network with SOA amplification,” in Proc. ICC, Beijing, China, June 2008.

Chanclou, Ph.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexibility in access networks: a novel WDMA/TDMA scheme for passive optical networks” in Optical Fiber Communication Conf. and Expo. and Nat. Fiber Optic Engineers Conf., 2007, paper JThA77.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network with SOA amplification,” in Proc. ICC, Beijing, China, June 2008.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network,” in Proc. KNS, Wroclaw, Poland, May 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “A novel TDMA/WDMA optical flexible access network,” in Proc. LASER, Munich, Germany, June 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Throughput optimisation with time and wavelengths flexibility applied to an enlarged PON implementing optical amplification,” in Proc. NOC, Vienna, Austria, July 2008.

Glatty, R.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Throughput optimisation with time and wavelengths flexibility applied to an enlarged PON implementing optical amplification,” in Proc. NOC, Vienna, Austria, July 2008.

R. Glatty, Ph. Guignard, Ph. Chanclou, “A novel TDMA/WDMA optical flexible access network,” in Proc. LASER, Munich, Germany, June 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network,” in Proc. KNS, Wroclaw, Poland, May 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network with SOA amplification,” in Proc. ICC, Beijing, China, June 2008.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexibility in access networks: a novel WDMA/TDMA scheme for passive optical networks” in Optical Fiber Communication Conf. and Expo. and Nat. Fiber Optic Engineers Conf., 2007, paper JThA77.

Guignard, Ph.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexibility in access networks: a novel WDMA/TDMA scheme for passive optical networks” in Optical Fiber Communication Conf. and Expo. and Nat. Fiber Optic Engineers Conf., 2007, paper JThA77.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network with SOA amplification,” in Proc. ICC, Beijing, China, June 2008.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network,” in Proc. KNS, Wroclaw, Poland, May 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “A novel TDMA/WDMA optical flexible access network,” in Proc. LASER, Munich, Germany, June 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Throughput optimisation with time and wavelengths flexibility applied to an enlarged PON implementing optical amplification,” in Proc. NOC, Vienna, Austria, July 2008.

Other (8)

ITU-T G.984.3 norm, Gigabit Capable Passive Optical Network, GPON.

IEEE 802.3ah norm, Ethernet Passive Optical Network.

Autorité de Régulation des Communications Electroniques et des Postes, La lettre de l’Autorité, n°53, December 2006.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexibility in access networks: a novel WDMA/TDMA scheme for passive optical networks” in Optical Fiber Communication Conf. and Expo. and Nat. Fiber Optic Engineers Conf., 2007, paper JThA77.

R. Glatty, Ph. Guignard, Ph. Chanclou, “A novel TDMA/WDMA optical flexible access network,” in Proc. LASER, Munich, Germany, June 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Throughput optimisation with time and wavelengths flexibility applied to an enlarged PON implementing optical amplification,” in Proc. NOC, Vienna, Austria, July 2008.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network,” in Proc. KNS, Wroclaw, Poland, May 2007.

R. Glatty, Ph. Guignard, Ph. Chanclou, “Flexible optical access network with SOA amplification,” in Proc. ICC, Beijing, China, June 2008.

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Figures (10)

Fig. 1
Fig. 1

Infrastructure currently deployed for GPON.

Fig. 2
Fig. 2

Proposed modification of the physical layer.

Fig. 3
Fig. 3

Passive infrastructure realizing flexible bandwidth allocation.

Fig. 4
Fig. 4

Architecture with SOA amplification at the CO.

Fig. 5
Fig. 5

Architecture with EDFA amplification at the CO.

Fig. 6
Fig. 6

Bandwidth repartition algorithm in the time domain.

Fig. 7
Fig. 7

Bandwidth repartition algorithm in the wavelength domain.

Fig. 8
Fig. 8

Combined functioning of algorithms in the time and wavelength domains.

Fig. 9
Fig. 9

Illustration of the simulated scenario of the CO.

Fig. 10
Fig. 10

Comparison of channel load variations for a fixed system (without DWA) on the left and flexible one (with DBA and DWA) on the right.

Tables (4)

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Table 1 Traffic Profile for Each Group of Clients

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Table 2 Average Wavelength Charge During Different Day Periods

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Table 3 Delay Comparison in the System for Different Day Periods

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Table 4 Queue Length Comparison in the System for Different Day Periods