The paper analyzes the development and deployment of SPN technology from theultra-high bandwidth requirement

low latency

network fragmentation etc. On 5G network

and the development and deployment of 10G GPON technology from high bandwidth

performance optimization requirements such as split ratio and transmission distance. Based on the above aspects

the paper explore the key issues such as layer three network downshift

network fragmentation

10G GPON evolution replacement.Evolution direction and networking characteristics of the SPN core layer

aggregation layer

and access layer and 10G GPON evolution and comparison been proposed

through calculate the bandwidth of each layer by establishing a model. Through the research on the construction and operation of the "double gigabit fi rst zone" based on SPN and 10G GPON technology

the thinking about the construction and evolution of the subsequent transmission network is triggered.