网络融合是现代通信网和计算机网发展的必然趋势。这里讨论通信领域关于网络融合的新概念:固定网、移动网、因特网的融合(FMIC)。从业务融合的角度讨论固定网与因特网、固定网与移动网、移动网与因特网之间的相互融合,并分析各种网络融合的协议体系。 Network convergence is the inevitable trend of the development of modern communication network and computer network. Here we discuss the new concept of convergence in the field of communications: fixed network, mobile network, Internet convergence (FMIC). From the perspective of business integration, we discuss the integration of fixed networks with the Internet, fixed networks and mobile networks, mobile networks and the Internet, and analyze various network convergence protocol systems.