NDLI: Flexibility Level Adjustment in Reconfigurable WDM-TDM Optical Access Networks

Content Provider	IEEE Xplore Digital Library
Author	Tran, N.-C. Tangdiongga, E. Okonkwo, C. Jung, H.-D. Koonen, T.
Copyright Year	1983
Abstract	Optical access networks have been widely adopted to support the exponential growth in bandwidth demand. To further fulfill the growth efficiently, reconfigurable wavelength division multiplexing–time division multiplexing optical access networks have been proposed in which optical network units can be reallocated to another wavelength on demand. Thus, the reconfigurability allows dynamic sharing of both wavelengths and timeslots. However, it requires a substantial addition to capital expenditure per user, which is prohibitive in access networks. This paper investigates an approach to preserve the merits of reconfigurability while significantly reducing the network complexity, thus cost by adjusting the level of flexibility. We define a parameter designated as the degree of flexibility to indicate the level of flexibility of a network. Then, we evaluate the performance of various degrees of flexibility based on the traffic capacity and the power consumption. The results suggest that introducing limited wavelength flexibility to the network significantly improves the performance in comparison to the static network while a highly or fully flexible network can further improve the performance but with smaller additional margins. Finally, we apply this result to a well-known reconfigurable architecture, the broadcast-and-select, to illustrate how the limited flexibility can help to reduce the network cost in terms of the optical power budget.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2542
Ending Page	2550
Page Count	9
File Size	1441894
File Format	PDF
ISSN	07338724
Volume Number	30
Issue Number	15
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth Optical network units Passive optical networks Wavelength division multiplexing Power demand Energy consumption wavelength division multiplexing (WDM) Optical fiber networks time division multiplexing (TDM)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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