Performance Evaluation of Delay Tolerant Networks Routing Protocols under varying Time to Live
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Abstract
To analysis the performance of routing protocols Delay Tolerant Networks (DTNs) play important role to considerate the design of DTNs. With the help of performance analysis we can find out the optimized routing protocol for the application or the system under control. During routing these protocols use their own knowledge to make routing decision and number of copies forwarding in the network scenario. In this paper we analysis the impact of Time to Live (TTL) to different DTNs routing protocols like Epidemic, Spray and Wait (SaW), Probabilistic Routing Protocol using History of Encounters and Transitivity (Prophet). The first two routing protocols do not require any knowledge about the network. The latter one protocol uses some extra information to make decisions on forwarding. As the results illustrated in graphs show that the delivery ratio steadily increased with the increasing TTL in the case of SaW routing protocol. . Simulation results also show that 20%-25% L copies of the total number of nodes in the network gives better delivery ratio and less overhead with minimum average delay in SaW. Keywords: Delay tolerant networks, epidemic, prophet, spray and wait, opportunistic network environment (ONE).
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