区块链赋能的6G频谱共享技术

Blockchain Empowered Dynamic Spectrum Sharing for 6G

6G无线网络将呈现资源协同化趋势,全频谱统一接入无蜂窝技术已成为6G的关键技术之一。然而密集部署的无蜂窝基站在频谱共享时将产生严重的干扰。针对这一问题,提出了一种基于联盟链的多基站协同功率控制方法。各基站共同组成一个联盟链网络,并基于区块链共识机制实现基站间功率协调控制,以降低因频谱共用而产生的干扰。以最大化系统的总吞吐量为目标,优化各基站的发射功率,并提出了一种等效转换方法以求解该非凸问题。仿真结果表明,所提算法相较于最大功率分配和正交频分复用策略能显著减少基站的发射功率开销,提升系统吞吐量。

6G wireless networks will develop towards resource coordination,and unified access to the whole spectrum without cellular technology has become one of the key technologies of 6G.However,densely deployed base stations cause serious interference when they share spectrum resources.To solve this problem,a consortium blockchain based cooperative power control method for multiple small cell base stations is proposed.To reduce the interference due to spectrum sharing,base stations jointly form a consortium blockchain network,and achieve cooperative power control based on the consensus mechanism.Aiming at maximizing the total system throughput,the transmit power of each base station is optimized,and an equivalent transformation method is proposed to solve the non-convex problem.The simulation results show that compared with the maximum power allocation and orthogonal frequency division multiplexing strategies,our proposed algorithm can significantly reduce the whole power overhead of base stations and improve the system throughout in different scenarios.