Delay Tolerant Networks

Thisbriefpresentsemergingandpromisingcommunicationmethodsfornetworkreliabilityviadelaytolerantnetworks(DTNs).Differentfromtraditionalnetworks，DTNspossessuniquefeatures，suchaslonglatencyandunstablenetworktopology.Asaresult，DTNscanbewidelyappliedtocriticalapplications，suchasspacecommunications，disasterrescue，andbattlefieldcommunications.ThebriefprovidesacompleteinvestigationofDTNsandtheircurrentapplications，fromanoverviewtothelatestdevelopmentinthearea.ThecoreissueofdataforwardinDTNsistackled，includingtheimportanceofsocialcharacteristics，whichisanessentialfeatureifthemobiledevicesareusedforhumancommunication.SecurityandprivacyissuesinDTNsarediscussed，andfutureworkisalsodiscussed.