Optimal Energy Consumption Protocol To Improve Qos In Delay Tolerant Networks

Delay Tolerant Networks(DTNs) characterized by long delays and intermittent connectivity provides communication even in areas, earlier considered inaccessible. Protocols meant for Internet cannot be used directly because of the above mentioned characteristics and the development of new protocols is important to improve the Quality of Service (QoS) of DTNs.Optimal Energy Consumption Protocol(OECP) for QoS improvement in DTNs is proposed. Number of encounters, residual hop count, expected delay and residual energy are the metrics considered to identify the next node to forward the message packet. Fuzzy logic is used to aggregate data of the above mentioned parameters, and this computational value is used to identify the forwarding node. The process of identifying the forwarding node is continued til the destination node is found.Simulation experiments done using NS 2 proves that OECP has higher packet delivery ratio and lower energy consumption, end to end delay, when compared with the two existing routing protocol for DTNs. Statistical analysis using one way ANOVA with Tukey HSD method was done to prove that proposed protocol has significant performance over the other two protocols Epidemic and OOF.