Semantics for Delay-Tolerant Network (DTN)

Due to a huge increase in usage, the wireless networks face several kinds of link disruption based on the deployment and operating conditions. In such conditions, the DTNs are proved to be a reliable source of advancing the wireless traffic despite damaged nodes, hostile conditions and jamming. This chapter provides a glimpse of the delay-tolerant network. Initially, the chapter covers the introduction to DTN along with its applications and characteristics. The DTN architecture is given describing the system and the layered architecture. The main aim of DTN is to minimize the delay and maximize the delivery ratio. The routing and message dissemination are very important in DTN. Therefore, the types of routing and the methods of message dissemination are described. The security issues related to DTN are added in later section. The special category of VANET where the traffic is sparse and no direct end-to-end communication is available comes under vehicular delay-tolerant network. The chapter also consists of the vehicular environment in delay-tolerant networks and the protocols for vehicular delay-tolerant network (VDTN).

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