一种划分小区域的区块链频谱共享管理方法

Spectrum sharing management method for the small-area-blockchain based on district partition

针对传统无线接入网中频谱共享的系统架构容量低且易遭受攻击等问题,提出了一种基于小区域划分的区块链分布式频谱共享管理方法。采用区块链分布式账本存储技术,将完整数据保存在区块链节点中,保证用户交易数据的完整性与安全性;节点根据功能进行分类,移动端用户仅作为轻量化节点,可降低其能耗与成本;将频谱资源提供者通过k均值算法自动划分到不同的区块链中,降低共识过程所带来的延迟。该方案将频谱资源提供者作为共识节点,移动端用户作为轻量化节点,对二者交易进行仿真。仿真结果表明,通过小区域划分方法增加了区块的确认次数,系统所有节点完成区块确认的平均时间为16 s;而未实施小区域划分的同类方案在保证系统安全性的前提下,最小次数的区块确认时间需36 s。这种方法在提高了系统安全性的同时,可大幅降低新区块确认过程的延迟。

In view of the low capacity and vulnerability of the spectrum sharing system architecture in traditional RANs(Radio Access Networks),a method of the distributed spectrum sharing system based on the small area blockchain is proposed.To ensure the integrity and security of the user’s transaction data,the blockchain distributed ledger storage technology is used for storing the complete data of all nodes in the blockchain.The nodes are classified according to their functions,and the mobile end users act as light nodes which can reduce their energy consumption and cost.The spectrum resource providers are divided into different blockchains by the k-means clustering algorithm to reduce the delay caused by the consensus process.In this paper,the spectrum resource providers are used as consensus nodes,and the mobile end nodes are used as light nodes.Simulation results show that the method of the small area blockchain proposed in this paper increases the number of block confirmations,and the average time for all nodes to complete the confirmations in the system is 16 seconds,while the similar scheme studied in the related work shows that it would take 36 seconds to complete the minimum number of confirmations under the premise of ensuring the security of the system.The proposed method can both improve the security of the system and reduce the delay of the new block confirmation process.