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Delay Tolerant Networks (DTNs) are the networks which support communication in frequently disconnected networks where the disconnection is for a long duration of time. The frequent disconnection may be due to node mobility, power conservation and so on. The DTN architecture addresses the issues of eventual connectivity and partitioned networks through message based store and forward overlay networks. The unpredictable and bursty traffic nature of DTN makes it necessary to handle the messages so as to optimize the performance. This paper focuses on optimizing the performance of Delay Tolerant Networks. The performance metric considered in this paper is that of delivery ratio. The proposed approach of optimization derives utility value of the message for the given metric when decision on transmission is to be taken.
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