A new DC network structure is proposed that addresses various limitations of ASIC switches. In an optical network of the present disclosure, a slight time domain limitation is introduced for transmission from a network node to a same destination node. Data transmission and reception operate in a time slot scheme. A switching bandwidth in the ASIC switch has a bandwidth corresponding to average incoming traffic of a plurality of nodes, and includes a storage medium that stores and processes traffic exceeding the bandwidth. An average bandwidth for the reception ASIC switch can also be set to a bandwidth in which the maximum incoming bandwidth to the node is reduced by a coefficient F. Limiting the bandwidth of the reception ASIC switch can reduce the power consumption of the node, which is beneficial for network scalability.