Blockchain-based Collision Avoidance Access Protocol for UAV Swarm

The explosive growth of unmanned aerial vehicles (UAVs) pose more and more aerial and communication resources, making efficient spectrum access control a key bottleneck for UAV swarm applications. Conventionally, the absence of a centralized authority may cause lots of spectrum collisions among UAVs, which not only wastes the spectrum resources, but also causes long access delay. To address this challenge, we propose a blockchain-based access protocol that can effectively mitigate the access collisions among a distributed UAV swarm in high dynamic scenarios Specifically, we design a collision avoidance access mechanism by leveraging blockchain and hash access. We also analyze the performance of the proposed protocol and compare it with the slot multi-channel Aloha protocol. Simulation results demonstrate that the proposed protocol can effectively reduce the spectrum access collisions and is superior to slot multi-channel Aloha in access success rate, throughput, and average access delay.