Abstract
DTN routing aims to realize message delivery from a node (source node) in the network to another specific node (destination node) without using dedicated communication infrastructure. Depending on the mobility of the source and the destination nodes, DTN routing is classified into four classes: mobile-to-mobile, fixed-to-mobile, mobile-to-fixed, and fixed-to-fixed. Most of conventional DTN routing studies have been focusing on mobile-to-mobile DTN routing. A large number of mathematical analyses and performance evaluations of mobile-to-mobile DTN routing have been performed, but the characteristics of other classes - in particular, mobile-to-fixed and fixed-to-fixed DTN routing - have not been well clarified. In this paper, as a mobile-to-fixed and fixed-to-fixed DTN routing, we focus on a position-based single-copy DTN routing. We build an analytical framework for those DTN routing mechanisms. Namely, we describe the average behavior of message delivery between the source node and the destination node. We then derive the average message delivery delay in the position-based single-copy DTN routing. Through numerical examples, we quantitatively compare the performances of a multi-copy mobile-to-mobile DTN routing and the position-based and single-copy mobile-to-fixed DTN routing.