[IEEE 2013 18th European Conference on Network and Optical Communications & 8th Conference on Optical Cabling and Infrastructure (NOC-OC&I) - Graz, Austria (2013.07.10-2013.07.12)] Proceedings of the 2013 18th European Conference on Network and Optical Communications & 2013 8th Conference on Optical Cabling and Infrastructure (NOC-OC&I) - A novel traffic-aware mechanism for energy-saving at the OLT in WDM/TDM-PON