Performance analysis of a hybrid flooding-probabilistic DTN protocol using logged contact data

Abstract

In this paper we analyze packet delivery, bufferspace, and transmission performance of a hybrid floodingprobabilisticDTN protocol using the DTN2 framework and onemonth of third-party logged contact data. This new protocolswitches from probabilistic to flooding when the number of nodecontacts is below a threshold. Results show only 0.52% fewermessages delivered compared to flooding and only 0.34% and0.16% higher buffer occupancy and bandwidth usage costscompared to probabilistic and suggest that flooding could beused to improve probabilistic DTN performance at times whennodes are more isolated and contacts scarce.