无人机协作通信系统中基于区块链的频谱共享机制

Spectrum Sharing Mechanism Based on Blockchain in UAV Cooperative Communication System

为解决无人机与蜂窝网络在协作频谱共享中的激励与安全问题,提出了一种基于区块链的频谱共享机制。首先,为保证无人机在协作过程中的可靠性和真实性,采用基于信誉的赢家判决方法和维克里(Vickery)拍卖的付款规则,在保证无人机通信最小速率前提下提出最大化蜂窝网络传输容量的优化方案。其次,为避免集中机构带来隐私泄露等危险,提出基于区块链的拍卖框架,使用区块链存储并更新无人机的信誉值,并使用智能合约功能来验证和执行拍卖。最后,通过仿真验证区块链的防篡改性,表明所提机制具有激励兼容性并能提升蜂窝网络的传输容量,且与其他方案相比具有较低的协作中断百分比和较好的公平性。

In order to solve the incentive and security problems of collaborative spectrum sharing between unmanned aerial vehicle(UAV)and cellular networks,a blockchain-based spectrum sharing mechanism is proposed.Firstly,in order to ensure the reliability and authenticity of the UAV in the process of collaboration,the winner decision method based on reputation and the payment rule of Vickery auction are adopted.And the optimization scheme of maximizing the transmission capacity of cellular network is proposed on the premise of ensuring the minimum communication rate of the UAV.Then,in order to avoid risks such as privacy leakage caused by centralized institutions,the auction framework based on blockchain is proposed,and the smart contract function is used to verify and execute the auction.Finally,the simulation results show that the proposed mechanism has incentive compatibility and can improve the transmission capacity of the cellular network.Compared with other solutions,it has a lower cooperative interrupt percentage and a better fairness.