Environment friendly green data broadcasting in delay-tolerant opportunistic networks

Abstract Opportunistic networks (OppNets) are a subtype of delay-tolerant networks in which there is no guarantee of the existence of a consistent path between two communicating nodes. Routing in OppNets can utilize a large amount of energy. However, due to battery constraints of nodes, the energy is limited. In this chapter, we discuss the energy efficiency issues in OppNets related to geocasting and security. We also focus on various geocasting techniques such as geocasting for OppNets (GeoOpp), expected visiting rate, and floating content to counter problems related to energy efficiency. Finally, using the opportunistic network environment simulator, we have compared the energy efficient protocols E-PRoPHET, E-ProWait, PORON, E-EDR, and E-ATDTN and observed that E-ATDTN outperforms these protocols in terms of average residual energy, number of message drops, and number of dead nodes.