Link Fault tolerable Network Topology for Network services provision in Disaster area

The drift change in weather and wars among countries changing the map of world rapidly and their result are too much dangerous. Aftermath the mass destruction of natural disaster or war, the communication infrastructure might be smashed completely or partially and would not be able to support the requirements of rescue operation. In this research paper we have proposed a link fault tolerable network topology for network service provision in disaster areas. In proposed framework methodology all HAPs connected with each other in mesh network topology, in Star topology with satellite and point to point with WiMAX ground stations. All HAPs have multiple hot backup links, which will become active in case of congestion or active link failure. The proposed hybrid network topology evaluated in comparison with hierarchal network topology in context of infrastructure. The results of evaluation proved that hybrid network topology is better than hierarchal network topology in terms of link redundancy, link utilization, end to end delay and throughput. In terms of link redundancy and link utilization, Hierarchal network topology have only limited backbone links while proposed hybrid network topology multiple redundant links which will not only increase the consistency and reliability also reduce the load on individual links. All simulations are performed using Optimized Network Engineering Tool (OPNET).