This system
main requirement consists of a two mail servers, mail client at each mail server
and an infomediary device. This offline email system architecture depends on
data synchronization among DTN nodes for four primary purposes which are bundled
and fragment identification, routing with scheduled and bundle expiration time
computations. This design architecture can enable the email to be sent locally
in an offline environment or online environment and a delay network connection
between this two environment created by infomediary device. This system offers
an advantage compare to conventional Wi-Fi Hotspot and native DTN
implementation in term of simplicity, user experience and affordability. System
implementation is discussed in the next chapter.
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