基于Oracle机制的电力5G可信数据上链技术

Power 5 G trusted data feed technology based on Oracle mechanism

针对电力区块链应用系统中数据上链效率和可信性问题,研究了基于5G和预言机(Oracle)机制的可信数据上链技术。首先,讨论了区块链系统中数据上链方式,分析了适用于电力5G区块链的Oracle数据上链方法;然后,提出了基于分布式Oracle的电力5G业务系统可信数据上链技术,设计了基于云-边-端一体化的系统总体架构,以及数据源注册、评估、上链的工作流程,其中,通过区块链系统实现分布式数据的采集共享,基于门限签名算法和可验证随机函数实现数据源评估,评估算法由边缘物联代理节点运行以确保系统的安全性和可用性,并通过对5G切片任务划分和优化实现认证数据和业务数据的高效传输。最后,在基于电力5G区块链的用电信息采集系统中部署文中所提方案,从通信性能、业务性能、资源利用等方面进行实验验证。结果表明,所提方案在不同负载压力测试下数据平均传输时延约为10 ms,误码率、丢包率小于0.9%。在100量级并发业务请求情况下,较已有方案性能提升超过80%,因而具有良好的可行性和推广价值。

Aiming at the efficiency and credibility of data feed in power blockchain application system,the trusted data feed technology based on 5G and Oracle mechanism is studied.Firstly,the data feed method in the blockchain system is discussed,and the Oracle data feed method applicable to the power 5G blockchain is analyzed.Secondly,the trusted data feed technology of the power 5G business system based on distributed Oracle is proposed,and the overall system architecture based on cloud-edge-terminal integration is designed,as well as the workflow of data source registration,evaluation and on chaining.Among them,the distributed data collection and sharing are realized through the blockchain system,and the data source evaluation is realized based on threshold signature algorithm and verifiable random function.The evaluation algorithm is run by the edge Internet of Things(IoT)agent node to ensure the security and availability of the system.Through the division and optimization of 5G slice tasks,the efficient transmission of authentication data and business data is achieved.Finally,the proposed scheme is deployed in the electricity 5G blockchain based power information acquisition system,and experimental verification is carried out from the aspects of communication performance,business performance,resource utilization,etc.The results show that the average data transmission delay of the proposed scheme under different load stress tests is about 10 ms,and the bit error rate and packet loss rate are less than 0.9%.In the case of 100-level concurrent service requests,the performance of the scheme is improved by more than 80%compared with the existing schemes,so it has good feasibility and promotion value.