ABSTRACT
This chapter presents a survey of the state-of-the-art on Delay Tolerant networks (DTN) congestion control. To set the stage for the discussion of existing DTN congestion control mechanisms. The chapter also discusses network congestion more generally and in the context of the Internet mechanisms. The Internet is a worldwide computer network that uses packet switching to transmit data between source and destination. Congestion control mechanisms are based on control theory and can be divided into two categories: Open-loop congestion control and Closed-loop congestion control. The chapter describes taxonomy to classify DTN congestion control mechanisms. It provides an overview of existing DTN congestion control mechanisms in light of the classification. Congestion detection techniques and the congestion indicators they use are critical to the congestion control effort. Congestion control solutions can be classified as proactive, reactive or hybrid. DTN congestion control mechanisms that rely on global network knowledge are classified as "low" deployability.
