Trust-Threshold Based Routing in Delay Tolerant Networks
U.S. Army Research Laboratory Adelphi United States
Pagination or Media Count:
Delay Tolerant Networks DTNs are self-organizing wireless networks with the characteristics of large latency, intermittent connectivity, and limited resources e.g., battery, computational power, bandwidth 1. Different from traditional networks such as mobile ad hoc networks, nodes in DTNs forward messages to a destination node in a store-and-forward manner 1 in order to cope with the absence of guaranteed end-to-end connectivity. In such environments, the key challenge is to select an appropriate next message carrier among all encountered nodes to maximize message delivery ratio while minimizing message overhead and delay. Further, we face additional challenges due to the lack of a centralized trust entity. The open, distributed, and dynamic inherent nature of DTNs also induces security vulnerability 2, 3. In this paper, we consider a DTN in the presence of malicious and uncooperative nodes and propose a method for the selection of trustworthy message carriers with the goal of maximizing message delivery ratio without compromising message delay or message overhead in the context of DTN routing.