Linear Protection Schemes Analysis in Scattered Placement Fiber-To-The Home-Passive Optical Network using Customer Access Protection Unit Solution

摘要

Problem statement: This study highlights on restoration scheme proposed against failure in working line at the drop region for Fiber-To-The Home (FTTH) with a Passive Optical Network (PON). Whereas PON was a system that brings optical fiber cable and signals all or most of the way to the end user. Approach: Survivability scheme against failure was focused on scattered residence architectures and it was applied in the ring and tree topology respectively by means of Customer Access Protection Unit (CAPU). CAPU will be installed before the ONU and ensure the signal will find the alternative path when failure occurs at the specific line. Our proposal scheme was low cost and applicable to any residence architecture. The advantage of this scheme was the failure at fiber line can be recovered until three levels to make sure the optic signal flow continuously to avoid any application disturbance. Two type of restoration scheme was proposed by means of linear protection (tree) and migrated protection (ring). FTTH based network design was simulated by using Opti System 7.0 in order to investigate the power output and BER performance at each node in the tree and ring protection scheme in scattered placement. This study we perform an analysis on linear protection scheme that consisting of two model a) Line to Line (L2L) protection and CAPU to CAPU (C2C) or shared protection. The migration of tree to ring topology to enable the signal flow continuously in the case of failure occurs specifically in random or scattered placement topology had been highlighted in our previous publication. Results: The signal will be divided into section; drop and pass through and the ratio was significant to determine the number of user allowed and achievable distance. Output power for optical nodes could be slightly improved by varying the pass through and drop signal ratio. Conclusion: Our proposal is the first reported up to this time in which the upstream signal flows in anticlockwise in ring topology when the restoration scheme activated.