  A decentralized federated learning architecture is proposed to apply to the
Businesses-to-Businesses scenarios by introducing the consortium blockchain in
this paper. We introduce a model verification mechanism to ensure the quality
of local models trained by participators. To analyze the latency of the system,
a latency model is constructed by considering the work flow of the
architecture. Finally the experiment results show that our latency model does
well in quantifying the actual delays.
