基于区块链的物联网可伸缩管理机制

为了解决大规模物联网（IoT）设备集中式管理的安全性和可伸缩性问题，提出一种基于区块链技术的轻量级物联网设备可伸缩管理框架。该框架采用区块链网络，在网络中部署智能合约为设备管理提供操作接口，利用设备管理器将轻量级物联网设备独立于区块链网络之外，并改进了区块链中拜占庭容错算法（PBFT）的一致性协议，增加了动态选举机制。仿真实验分别对改进共识算法的性能和机制的可伸缩性进行验证，结果表明，该机制具有良好的伸缩性，设备管理器每秒能响应约1 000次的请求。与传统PBFT算法相比，改进算法提高了交易吞吐量，缩短了交易延时，并减少了通信开销。

IoT scalable management mechanism based on blockchain

In order to solve the security and scalability of centralized management of large-scale IoT devices, this paper proposed a scalable management framework for lightweight IoT devices based on blockchain technology. The framework used a blockchain network, deployed smart contracts in the network to provide an operational interface for device management, used device managers to separate lightweight IoT devices from blockchain networks, and improved Byzantine fault tolerance in blockchains, the algorithm(PBFT) consistency protocol added a dynamic election mechanism. The simulation experiments verify the performance and mechanism scalability of the improved consensus algorithm. The results show that the mechanism has good scalability, and the device manager can respond to about 1 000 requests per second. Compared with the traditional PBFT algorithm, the improved algorithm improves transaction throughput, reduces transaction latency, and reduces communication overhead.