Survivability in FTTH PON Access Network using Optical Cross Add and Drop Multiplexer Switch

Abstract

This paper describes our approach toward advanced customer access network through the development of an optical cross add and drop multiplexer (OXADM) switch. The OXADM focuses on providing survivability through restoration against failure by means of dedicated and shared protection that is applied in FTTH-PON. No degradation in the BER was observed, as confirmed by a comparison of the simulation results with those obtained from system without restoration function in ideal condition to prove the system feasibility.Another feature is the high speed restoration achieved by automatic re-routing using fiber status monitoring. Each OXADM has a node controller which receives reports on the status periodically from Access Control System (ACS). When a failure is detected, ACS will send a command to an OXADM which is the activated. The proposed restoration system is the first of its kind which covers the survivability in the drop section of FTTH access network.