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Bandwidth Allocation Algorithm for Improving QoS in EPON with Sleep Mode
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 Title & Authors
Bandwidth Allocation Algorithm for Improving QoS in EPON with Sleep Mode
Yang, Won-Hyuk; Jeong, Jin-Hyo; Kim, Young-Chon;
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Recently, as the interest in Green IT is exponentially increased, EPON with sleep mode has been studied to reduce energy consumption in access network. In oder to guarantee cyclic sleep for ONU(Optical Network Units), EPON with sleep mode transmits upstream and downstream data at the same time. However, since conventional algorithms for sleep mode in EPON allocate bandwidth to each ONU according to upstream bandwidth request, the QoS of downstream data is not guaranteed when the offered load of OLT is larger than that of ONU. In this paper, we propose a bandwidth allocation algorithm for improving QoS in EPON with sleep mode. The proposed algorithm compares its size with an upstream request of ONU when a downstream buffer in the OLT exceeds a QoS threshold. And then it allocates selectively a bandwidth that satisfies the required QoS between the bandwidth request of ONU and OLT. Therefore, the proposed algorithm can save energy through cyclic sleep of ONUs while guaranteeing the QoS of up/downstream data. In order to evaluate the proposed algorithm, we perform simulation in terms of total sleep time of ONUs, queueing delay between OLT and ONU, and the utilization of allocated bandwidth at OLT through OPNET.
EPON;Energy efficiency;Sleep mode;Bandwidth allocation;
 Cited by
C. Lange and A. Gladisch, "Energy consumption of telecommunication networks: A network operator's view," in Work shop on Optical Fiber Communication Confence(OFC) "Energy Footprint of ICT: Forecasts and network solutions", 2009.

C. Lange, D. Kosiankowski, C. Gerlach, F. Westphal, and A. Gladisch, "Energy consumption of telecommunication networks," in 35th European Conference on Optical Communication(ECOC), 2009, pp. 1-2.

B. Nordman and K. Christensen, "Reducing the Energy Consumption of Networked Devices", Tutorial presented at the July 2005 IEEE 802 LAN/MAN Standards Committee Plenary Session, available at:

IEEE 802.3av Task Force, Available at:

ITU-T G.987.x Series of Recs, Available at:

R. Kubo, J. Kani, H. Ujikawa, T. Sakamoto, Y. Fujimoto, N. Yoshimoto, and H. Hadama, "Study and Demonstration of Sleep and Adaptive Link Rate Control Mechanisms for Energy Efficient 10G-EPON," IEEE/OSA Journal of Optical Communications and Networking, vol. 2, no. 9, pp. 716.729, 2010

J. Zhang and N. Ansari, "Towards energy-efficient 1G-EPON and 10GEPON with sleep-aware MAC control and scheduling," in IEEE Communications Magazine, vol. 49, no. 2, February 2011

Shing-Wa Wong, She-Hwa Yen, P. Afshar, S. Yamashita, L.G. Kazovsky, "Demonstration of energy conserving TDM-PON with sleep mode ONU using fast clock recovery circuit", Proceedings of OFC/NFOEC, pp. 1-3, 21-25 March, 2010.

Jin-Hyo Jeong, Wonhyuk Yang, Young-Chon Kim, "Analysis on Sleep Time of Fixed Bandwidth Allocation in EPON with JIT-SC", Proceedings of JCCI, Apr. 2011.

Y. Yan, and L. Dittmann, "Energy Efficiency in Ethernet Passive Optical Networks (EPONs): Protocol Design and Performance Evaluation," in ACM Journal of Communications, vol 6, no 3, pp. 249-261, May 2011.

S. Wong, L. Valcarenghi, S. Yen, D. Campelo, S. Yamashita, and L. Kazovsky, "Sleep Mode for Energy Saving PONs: Advantages and Drawbacks," in IEEE GLOBECOM Workshops, 2009, pp. 1-6.

G. Kramer, B. Mukherjee, and G. Pesavento, "IPACT : A Dynamic Protocol For An Ethernet PON (EPON)," IEEE Communications Magazine, vol. 40, no. 2, pp. 74-80, February 2002..