3 research outputs found
On the Conditions that Justify Dynamic Reconfigurability in WDM-TDMA Optical Access Networks
[EN] In a passive optical network with a hybrid wavelength
division multiplexing time division multiple-access
scheme, implementing reconfigurable wavelength assignment
is complex; hence the need to determine the conditions
for which the capacity improvements justify requiring
reconfigurability over adopting a more inexpensive fixed
wavelength assignment. Fixed and reconfigurable approaches
to wavelength assignment are modeled and evaluated under
nonstationary traffic conditions. The performance improvement
is obtained in terms of bit rate gain relative to the
nominal bandwidth and depends on the number of wavelength
channels as well as the magnitude of the load offered by the
optical network units. In addition, frame delay and frame loss
in relation to the bit rate performance are obtained for Pareto
and exponentially distributed traffic. Simulations show that
when introducing reconfigurability, typical peak bit rate gains
with respect to the fixed case are 17%, and maxima of 175%
are potentially possible when traffic demands are particularly
uneven.This work was supported by the EC 7th Framework Program: Architectures for fLexible Photonic Home and Access networks (ALPHA), under contract ICT CP-IP 212 352, from the Generalitat of Valencia under contract ACOMP/2010/196. The authors thank the Performability Engineering Research Group (PERFORM) at the University of Illinois at Urbana-Champaign for developing the software tool Mobius.GarcĂa Roger, D.; Artundo MartĂnez, I.; Ortega Tamarit, B. (2011). On the Conditions that Justify Dynamic Reconfigurability in WDM-TDMA Optical Access Networks. Journal of Optical Communications and Networking. 3(4):259-271. https://doi.org/10.1364/JOCN.3.000259S25927134A highly flexible and efficient passive optical network employing dynamic wavelength allocation. (2005). Journal of Lightwave Technology, 23(1), 277-286. doi:10.1109/jlt.2004.838811Maier, M., Herzog, M., & Reisslein, M. (2007). STARGATE: the next evolutionary step toward unleashing the potential of WDM EPONs [Topics in Optical Communications]. IEEE Communications Magazine, 45(5), 50-56. doi:10.1109/mcom.2007.358848Urban, P. J., Huiszoon, B., Roy, R., de Laat, M. M., Huijskens, F. M., Klein, E. J., … de Waardt, H. (2009). High-Bit-Rate Dynamically Reconfigurable WDM–TDM Access Network. Journal of Optical Communications and Networking, 1(2), A143. doi:10.1364/jocn.1.00a143Glatty, R., Guignard, P., & Chanclou, P. (2009). Fair Resource Distribution Within the Flexible WDMA/TDMA Optical Access Network Based on GPON Infrastructure. Journal of Optical Communications and Networking, 1(2), A17. doi:10.1364/jocn.1.000a17Roy, R., Manhoudt, G., & van Etten, W. (2008). Optical-router-based dynamically reconfigurable photonic access network. Journal of Optical Networking, 8(1), 51. doi:10.1364/jon.8.000051Koonen, T., Steenbergen, K., Janssen, F., & Wellen, J. (2001). Photonic Network Communications, 3(3), 297-306. doi:10.1023/a:1011411600793Homa, J., & Bala, K. (2008). ROADM Architectures and Their Enabling WSS Technology. IEEE Communications Magazine, 46(7), 150-154. doi:10.1109/mcom.2008.4557058Strasser, T., & Taylor, J. (2008). ROADMS Unlock the Edge of the Network. IEEE Communications Magazine, 46(7), 146-149. doi:10.1109/mcom.2008.4557057Leland, W. E., Taqqu, M. S., Willinger, W., & Wilson, D. V. (1994). On the self-similar nature of Ethernet traffic (extended version). IEEE/ACM Transactions on Networking, 2(1), 1-15. doi:10.1109/90.282603Kramer, G., Mukherjee, B., & Pesavento, G. (2002). Photonic Network Communications, 4(1), 89-107. doi:10.1023/a:1012959023043Skubic, B., Jiajia Chen, Ahmed, J., Wosinska, L., & Mukherjee, B. (2009). A comparison of dynamic bandwidth allocation for EPON, GPON, and next-generation TDM PON. IEEE Communications Magazine, 47(3), S40-S48. doi:10.1109/mcom.2009.4804388Papadimitriou, G. I., & Pomportsis, A. S. (1999). Self-adaptive TDMA protocols for WDM star networks: a learning-automata-based approach. IEEE Photonics Technology Letters, 11(10), 1322-1324. doi:10.1109/68.789731Linardakis, C., Leligou, H. C., Stavdas, A., & Angelopoulos, J. D. (2005). Using explicit reservations to arbitrate access to a metropolitan system of slotted interconnected rings combining TDMA and WDMA. Journal of Lightwave Technology, 23(4), 1576-1585. doi:10.1109/jlt.2005.844198Kanonakis, K., & Tomkos, I. (2010). Improving the efficiency of online upstream scheduling and wavelength assignment in hybrid WDM/TDMA EPON networks. IEEE Journal on Selected Areas in Communications, 28(6), 838-848. doi:10.1109/jsac.2010.100809McGarry, M. P., Reisslein, M., & Maier, M. (2006). WDM Ethernet passive optical networks. IEEE Communications Magazine, 44(2), 15-22. doi:10.1109/mcom.2006.1593545Dhaini, A. R., Assi, C. M., Maier, M., & Shami, A. (2007). Dynamic Wavelength and Bandwidth Allocation in Hybrid TDM/WDM EPON Networks. Journal of Lightwave Technology, 25(1), 277-286. doi:10.1109/jlt.2006.886683Chihchung Chen, Chengkuo Lee, & Yen-Jyh Lai. (2003). Novel voa using in-plane reflective micromirror and off-axis light attenuation. IEEE Communications Magazine, 41(8), S16-S20. doi:10.1109/mcom.2003.122271
Application specific photonic integrated circuits through generic integration, a novel paradigm in photonics
[EN] This paper reviews our recent work on integrating
photonic devices and sub-systems onto a single
photonic chip, by means of generic integration.This work has been partially funded through the Spanish Plan Nacional de I+D+i 2008-2011 project ”Coupled Resonator Optical Waveguide eNgineering (CROWN)” grant no. TEC2008-06145/ TEC, by the Generalitat Valenciana through project
PROMETEO/2008/092 and by the EC FP6 contract no. 004525 ePIXnet. J.D. Doménech acknowledges the
FPI research grant BES-2009-018381.Muñoz Muñoz, P.; DomĂ©nech GĂłmez, JD.; Artundo MartĂnez, I.; Habib, C.; Leijtens, X.; De Vries, T.; Robbins, D.... (2011). Application specific photonic integrated circuits through generic integration, a novel paradigm in photonics. Waves. 3:58-64. http://hdl.handle.net/10251/57675S5864
Cost forecasting of passive components for optical fiber network deployments
[EN] To analyze the costs of deploying any optical fiber network, it is critical to know the evolution of prices of
its individual components in time. In this paper we investigate on the pricing and installation costs of
several passive optical components, focusing as an example on optical fiber connectors, and present reliable
data price trends for them. We then propose future costs based on parametric methods and the
application of the extended learning curve model. The key contributions of this analysis are the accurate
learning coefficients extracted for each type of optical component, ranging from 0.66 to 0.96 for fiber
connectors or 0.88 for fiber cables, which can serve as valuable inputs to more complex, higher-level
techno-economical models. Large price drops of 33% for splitters and 78% for attenuators have been also
identified with these methods for the following years.This work was supported by the EC 7th Framework Program:
Architectures for fLexible Photonic Home and Access networks
(ALPHA), ICT 212 352.Artundo MartĂnez, I.; Tymecki, A.; Ortego, E.; Ortega Tamarit, B. (2011). Cost forecasting of passive components for optical fiber network deployments. Optical Fiber Technology. 17(3):218-226. https://doi.org/10.1016/j.yofte.2011.02.001S21822617