区块链网络拓扑优化和转发策略设计

Topology optimization and forwarding strategy design for blockchain network

为解决区块链网络的数据传输效率低问题,提出了区块链传输效率优化方法来优化网络拓扑和转发策略。首先,设计了可信值函数计算区块链节点的可信值,综合考虑可信值和传输时间构建树形拓扑。然后,基于树形拓扑设计转发路径选择策略,以最小整体并发传输时间为目标,建立节点关于其邻居节点转发次序的转发表。为了减小节点变化对树形拓扑的影响,提出了拓扑动态优化策略局部调整树形拓扑。转发路径选择策略使整个数据传输过程具有最小传输时间,动态优化策略避免重构全网拓扑,有效缩短数据传输时间。仿真结果表明,与权重优先算法相比,所提方法的传输时间减小了约20%,显著提高了数据传输效率。

In order to solve the problem of the low data transmission efficiency of the blockchain network, an optimization method of blockchain transmission efficiency was proposed to optimize the network topology and forwarding strategy. First, the trusted value function was designed to calculate the trusted value of blockchain nodes, and a tree topology was constructed by comprehensively considering the trusted value and transmission time. Furthermore, the forwarding path selection strategy was designed based on the tree topology, with the minimum overall concurrent transmission time as the goal, and the forwarding table of the node about the forwarding order of its neighbor nodes was established. To reduce the impact of the node changed on the tree topology, a topology dynamic optimization strategy was proposed to adjust tree topology locally. The forwarding path selection strategy enabled the entire data transmission process to have the minimum transmission time, and the dynamic optimization strategy avoided reconfiguration of the entire network topology and effectively shortened the data transmission time. The simulation results show that, compared with the weight-first algorithm, the transmission time of the proposed method is reduced by about 20%, and the data transmission efficiency is significantly improved.