On-Demand Multicast Slot Allocation Scheme for Active Optical Access Network Using PLZT High-Speed Optical Switches
This paper proposes an on-demand multicast slot allocation scheme for an active optical access network that uses Mach-Zehnder-type high-speed optical switches, which are achieved by the Plumbum Lanthanum Zirconate Titanate (PLZT) switching technology. The Active Optical Network, called ActiON, is based on slot-based switching. Compared to the Passive Optical Network (PON), ActiON quadruples the number of subscribers (128 users) per Optical Line Terminal (OLT) and doubles the maximum transmission distance (40 km) between OLT and Optical Network Units (ONUs). However, as ActiON uses slot-based switching, it needs a large number of slots to deliver multicast contents to the requesting users. This greatly lowers network utilization rates.