区块链技术是近两年新兴的一种分布式基础架构与计算范式，为分布式数据的存储、验证、传递和交流提供了一种解决方案。为了缩短区块数据交易确认时间，提高区块链业务处理能力，尽快推进区块链实施落地，必须解决区块链交易验证中数据通信性能优化问题。本项目首先从通信拓扑结构和通信机制方面优化通信性能，采用树形拓扑结构，充分考虑节点通信能力的异构性，引入并发通信机制，将区块链物理网络拓扑结构抽象树形结构，构建多连接并发通信树模型；其次基于此模型，针对不同的应用需求和场景，在节点通信能力、节点信任度、权值、服务请求优先级等多个影响因素的约束下，构造以多目标为优化目的的并发通信树，提出不同的多目标多因子区块链数据通信性能优化策略。最后针对区块链节点失效而导致区块链通信性能下降问题，提出一种考虑节点失效的区块链通信算法。本项目将补充完善区块链数据通信性能优化基础理论，为区块链技术应用实施提供技术支持。

Blockchain technology is a new distributed infrastructure and computing mode in recent two years, and it provides a distributed data management solution for storage, authentication, transfer and exchange. In order to shorten the confirmation time of block data transaction, improve the processing capacity of blockchain, and move toward implementation of blockchain as soon as possible, it is necessary to solve the problem of data communication performance optimization in block chain transaction validation. The project establishes a multi-link concurrent communication tree model from communication topology and communication mechanism. This model uses tree topology structure, considers the heterogeneity of node communication capacity, and introduces the concurrent communication mechanism. So blockchain physical network topology structure can be abstracted to logical tree structure. Based on this model, for different application requirements and scenarios of blockchain, it proposes different multi-targets multi-factors performance optimization strategies for blockchain data communication considering multiple impact factors, such as nodes’ transmitting capacity, nodes’ trust degree, weight, service request priority. Finally, in order to solve the problem of blockchain node's performance degradation caused by node failure on blockchain, a blockchain communication algorithm considering node failure is proposed. This project will complement and improve the basic theory of blockchain data communication performance optimization and provide technical support for the application of blockchain technology.