A Novel Contact Based Mechanism to Decrease Overhead Ratio in Delay Tolerant Networks
Keywords:
DTN (Delay Tolerant Network), intermittent connectivity, Spray and Wait routing, Contact, ONE simulatorAbstract
DTN (Delay Tolerant Network) is wireless network in which data is transmitted through intermediate nodes. DTN provides store carry and forward mechanism to transfer messages from one node to another node. To transfer data between nodes, DTN provides some standard routing algorithms named epidemic routing, spray and wait routing, prophet and many more. Each routing mechanism has its own features as well as some drawbacks. In spray and wait routing, rate of replication of messages is too high while delivery ratio is also high. So, to overcome drawback of too high replication, the present research paper focuses on mechanism to measure contacts between nodes to reduce replication of messages .The contact is calculated between two nodes when they are in range of each other. In proposed algorithm, popularity vector is calculated based on duration of contacts between nodes. The value of the popularity vector of nodes will be used for selecting most appropriate node for message forwarding. High popularity value of a node will have more probability of successfully delivering the message. Proposed mechanism will reduce replication of messages and hence delivery ratio will be increased and overhead ratio will also decrease significantly.
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