  The integration of multi-access edge computing (MEC) and RAFT consensus makes
it feasible to deploy blockchain on trustful base stations and gateways to
provide efficient and tamper-proof edge data services for Internet of Things
(IoT) applications. However, reducing the latency of storing data on blockchain
remains a challenge, especially when an anomalytriggered data flow in a certain
area exceeds the block generation speed. This letter proposes an intelligent
transaction migration scheme for RAFT-based private blockchain in IoT
applications to migrate transactions in busy areas to idle regions
intelligently. Simulation results show that the proposed scheme can apparently
reduce the latency in high data flow circumstances.
