Drones, or unmanned aerial vehicles, can be used for commercial services such as short-dis-tance delivery. In order to ensure quality services, multiple drone-based delivery service providers can be employed in delivery service systems. In this article, we address two very important and unexplored challenges of employing drones in delivery services. First, involving multiple drones from different service providers elevates the chance of collision during flights. Second, drones may hamper the privacy of citizens by unauthorized access to private and restricted areas. In order to solve the aforementioned issues, we propose a blockchain-based policy enforcement mechanism in the drone-based delivery service systems. At first, the mechanism will set policies to establish pre-allocated flight paths for different drones at different times to avoid collisions, and ensure the privacy of citizens by restricting their access to unauthorized areas. Later, the blockchain will enforce the policies to monitor compliance of the drone flights and identify non-compliant drone services to penalize corresponding service providers. We simulate a virtual drone-based delivery system with the Ethereum blockchain platform and examine the performance and feasibility of our proposed mechanism.

中文翻译：

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区块链驱动的政策实施，以确保基于无人机的服务系统中的航班合规性

无人机或无人驾驶飞机可用于商业服务，例如短距离运送。为了确保高质量的服务，可以在交付服务系统中采用多个基于无人机的交付服务提供商。在本文中，我们解决了在交付服务中使用无人机的两个非常重要且尚未探索的挑战。首先，涉及来自不同服务提供商的多架无人机会增加飞行中发生碰撞的机会。第二，无人驾驶飞机可能会未经授权进入私人和禁区，从而妨碍公民的隐私。为了解决上述问题，我们在基于无人机的交付服务系统中提出了一种基于区块链的策略执行机制。首先，该机制将制定政策，在不同的时间为不同的无人机建立预先分配的飞行路径，以避免发生碰撞，并通过限制公民进入未经授权的区域来确保其隐私。稍后，区块链将执行策略以监控无人机飞行的合规性，并识别不合规的无人机服务，以惩罚相应的服务提供商。我们使用以太坊区块链平台模拟基于虚拟无人机的交付系统，并检查我们提出的机制的性能和可行性。