Connection Time for Routing Decisions in Vehicular Delay Tolerant Network

Abstract

Delay Tolerant Networks (DTN) is a widely used communication standard in recent years, for situations where there is no end to end path available between sender and receiver, higher delays and nodes are sparse with less chance of meetings as compare to traditional networks. A comparatively new standard named Vehicular Delay Tolerant Networks (VDTN) is introduced in recent years which contain many properties of DTN along with others like high mobility, quickly changing dynamic topologies and here nodes are vehicles. PRoPHET, NECTAR, Source Routing, Per-hop Routing and other routing protocols take routing decisions on the basis of multiple parameters like encounter history, buffer occupancy/availability, location information, remaining TTL (time to live) of the bundle, closeness to destination and meeting probability along with many others. In this paper we are introducing a parameter named “connection_time”. This connection_time could also be a worthy candidate for routing protocols and could be used to create new routing protocols along with other parameters, to take better routing decisions. Like let suppose connection time is 3 s and data may take more than 5 s then it would be efficient to avoid sending data and find a new suitable node. We ran multiple simulations to determine connection time with different connection properties, like different vehicle speeds, different antenna ranges and vehicle conditions (moving or static) and found out connection time variances. With 100 antenna range and vehicle speed 30 km/h to 60 km/h connection time is 3.6 to 6.6 s.