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Both data ferrying with disruption-tolerant networking (DTN) and mobilecellular base stations constitute important techniques for UAV-aidedcommunication in situations of crises where standard communicationinfrastructure is unavailable. For optimal use of a limited number of UAVs, wepropose providing both DTN and a cellular base station on each UAV. Here, DTNis used for large amounts of low-priority data, while capacity-constrained cellcoverage remains reserved for emergency calls or command and control. Weoptimize cell coverage via a novel optimal transport-based formulation usingalternating minimization, while for data ferrying we periodically deliver databetween dynamic clusters by solving quadratic assignment problems. In ourevaluation, we consider different scenarios with varying mobility models and awide range of flight patterns. Overall, we tractably achieve optimal cellcoverage under quality-of-service costs with DTN-based data ferrying, enablinglarge-scale deployment of UAV swarms for crisis communication.

UAV Swarms for Joint Data Ferrying and Dynamic Cell Coverage via Optimal Transport Descent and Quadratic Assignment