Md. Ibrahim Talukdar and Md. Sharif Hossen
In recent years, researchers are giving an alarming issue about the natural disaster like earthquake, flooding etc. These situations make the fixed infrastructure being damaged. So, the emergency of urgent communication is necessary to save life and resources which are possible by establishing an adhoc network like delay tolerant network (DTN). This network is featured by sporadic connectivity, long delay, and asymmetric data rates. Under the above scenario, our work contributes to find the right mobility model and routing to reach the first responders in the affected area. For this reason, we have considered a congested city named Dhaka in Bangladesh. In this research, the effects of DTN movement models i.e., shortest path map based (SPMB), random way point (RWP), random Walk (RW), and delay- tolerant routing schemes i.e., epidemic, binary-spray-and-wait (B-SNW), prophet and pray-and-focus (SNF) have been investigated in mobile ad hoc network. For varying buffer sizes and number of mobile nodes, performance metrics like delivery, latency, overhead, hop count, buffer time etc. are estimated. OpenJump and opportunistic network environment (ONE) tools, coded by java, are used to map building and to measure the efficiency of mobility models and protocols. The outcome of this research shows that under this scenario the best suitable routing strategy and movement model is spray-and-focus and shortest path map based movement respectively among the protocols and models considered here based on the simulation environment and parameter settings.
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