Selective 2-Phase Spray and Wait Routing for Overhead Reduction in Delay Tolerant Networks

DTN (Delay Tolerant Network) facilitates a communication between heterogeneous networks when there are transmission delay and network disconnection frequently, in order to support a transmission of messages without infrastructure like Internet. For improvement of spray and wait routing, which is the representative routing protocol in DTN, this paper proposes the selective 2-phase spray and wait routing algorithm. This algorithm divides transmission phase into 2 parts and fulfills a data transmission in the light of condition of network and end device. For this, we deduce the appropriate number of data transmission and apply the optional number of data transmission respectively based on the network and end device condition. With the proposed selective 2-phase data transmission algorithm, the transmission reliability and efficiency of network resource are improved. We evaluated the performance of proposed algorithm compared with the previous algorithm using ONE-simulator, and the result shows that the proposed algorithm is more efficient in terms of network overhead.