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학술지 Dynamic Bandwidth and Wavelength Allocation Scheme for Next-Generation Wavelength-Agile EPON
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Lin Wang, Xinbo Wang, Massimo Tornatore, 정환석, 이한협, 박수명, Biswanath Mukherjee
IEEE/OSA Journal of Optical Communications and Networking, v.9 no.3, pp.B33-B42
16MH1100, SDN 기반 유무선 액세스 통합 광네트워킹 기술, 정환석
Recently, the IEEE 802.3 Ethernet Working Group has classified three architectures for the nextgeneration Ethernet passive optical network (NG-EPON). They are called single-scheduling domain (SSD) PON, multi-scheduling domain (MSD) PON, and wavelength-agile (WA) PON, and they differ based on how a group of optical network units (ONUs) share awavelength. Existing dynamic bandwidth and wavelength allocation (DBWA) schemes for conventional EPON can be applied to MSD-PON and SSDPON, but not WA-PON. This is because WA-PON is a new architecture with full flexibility where a flexible number of wavelengths can be assigned to one ONU, and multiple ONUs can transmit at the same time. In this work, we develop a mathematical model and a novel DBWA scheme for transmission scheduling in WA-PON. However, as WA-PON incurs penalties in terms of delay and power consumption when an ONU activates its transmissions on new wavelengths, a trade-off between energy saving and data-transfer latency reduction needs to be carefully addressed when performing transmission scheduling. So, we develop a power-consumption model and modify the proposed DBWA scheme to enhance the energy efficiency ofWA-PON. Finally, we conduct simulation experiments for performance evaluation of the three PON architectures in terms of latency and packet loss ratio.We quantitatively investigate the influence of various parameters, such as the number of ONU transceivers and ONU buffer size, onWA-PON latency and packet loss ratio, and we evaluate the energy efficiency gain of the modified DBWA scheme.
KSP 제안 키워드
Allocation scheme, Buffer Size, Dynamic bandwidth, Efficiency gain, Energy Efficiency, Energy saving, Ethernet Passive Optical Network, IEEE 802.3, Mathematical model, Multi-scheduling, NG-EPON