Survivable Hybrid Wireless-Optical Broadband Access Networks In A Single Segment Failure

Hybrid wireless optical network is gaining popularity because of its wireless features. In WOBAN, the wired part of the access network is replaced with a wireless connectivity Wired router is replaced with wireless router in the network. In a typical network setup, WOBAN consist of servers, optical network unit (ONU), optical line terminal (OLT), routers and node. Back end network of WOBAN is wired optical network and the front end is wireless. Survivability of WOBAN is an important issue. A single segment failure in WOBAN is a scenario where ONU are disconnected with OLT which will lead to large data loss and inconvenience to the users. We are proposing an optimised scheme called optimizing back up ONUs selection and back up fiber deployment (OBOF) to provide survivability of WOBAN in a segment failure. In OBOF scheme simulated annealing algorithm is used for optimising the selection of back up ONU. Enhanced greedy algorithm is used for optimising the fibre layout and channel capacity utilisation. Implementation is done using JAVA