This work investigates the unified coding and identification of smart grid IoT devices, as more and more IoT devices in smart grid need to be managed and controlled. We combine blockchain technology with 5G MEC to realize the connection of massive power IoT devices at the edge of 5G network. Due to blockchain’s distributed storage and credibility, it is used to identify and register IoT devices in smart grid, ensuring the reliability and accuracy of smart grid IoT devices management. In this paper, we propose a hybrid blockchain mechanism based on 5G MEC smart grid, where both public blockchain and private blockchain are deployed on the MEC gateway/server. To facilitate the data searching and extracting, we endeavor to build a blockchain explorer indexed by IoT device identifier. After that, we study the typical consensus algorithms in the blockchain such as PoW, PoS, DPoS, PDFT, and discuss their feasibility in the hybrid blockchain. Finally, we analyzed and compared the performance of different consensus algorithms from the perspective of average computing time and average time to agreement.

这项工作研究了智能电网IoT设备的统一编码和标识，因为越来越需要对智能电网中的IoT设备进行管理和控制。我们将区块链技术与5G MEC相结合，以在5G网络边缘实现大型电力IoT设备的连接。由于区块链的分布式存储和信誉，它可用于在智能电网中识别和注册IoT设备，从而确保智能电网IoT设备管理的可靠性和准确性。在本文中，我们提出了一种基于5G MEC智能电网的混合区块链机制，其中在MEC网关/服务器上同时部署了公共区块链和私有区块链。为了促进数据搜索和提取，我们努力构建一个由IoT设备标识符索引的区块链浏览器。之后，我们研究了PoW，PoS，DPoS，PDFT等区块链中的典型共识算法，并讨论了它们在混合区块链中的可行性。最后，我们从平均计算时间和平均达成协议时间的角度分析和比较了不同共识算法的性能。