Vicinity Resource Cartography for Delay-Tolerant Networks: A Holistic Perspective
In this paper, the authors propose a distributed approach to construct vicinity resource maps at each node in a delay tolerant network. The scheme uses recent encounters to estimate the availability of the following resources: energy, buffer space, and bandwidth, in the vicinity of a given node. They then show how a store-carry-forward scheme may benefit from having access to these resource estimates. While knowledge about resources available in the vicinity allows nodes to implement meaningful custodian election strategies, an evaluation of available bandwidth and contact time allows them to carry out adaptive queue management strategies. Thus, such strategies can be approached from a holistic perspective based on the availability of the three resources under consideration in node proximity.