A Simulative Study on the Factors Affecting Single-copy and Multi-copy Protocols in DTN

Due to its characteristics such as long communication delay, high dynamic topology, sparse distribution of nodes and frequent link break, routing are the key research issues of delay tolerant networks. Performance analysis of different routing protocols is the major step before selecting and designing the routing protocol. Routing protocols perform different under different network environments (e.g., memory space, traffic, message size etc.). In this paper, the factors that affect the performance of single-copy and multi-copy algorithm in DTN are studied. The performance analysis is compared in terms of delay, packet delivery ratio and overhead.