One example of a device comprises: a central node that is as a communication data center of a network-on-chip; a plurality of leaf nodes that are as communication data nodes of the network-on-chip and for transmitting the communication data to a central leaf node; forwarder modules for connecting the central node with the plurality of leaf nodes and forwarding the communication data, wherein the plurality of leaf nodes are divided into N groups, each group having the same number of leaf nodes, the central node is individually in communication connection with each group of leaf nodes by means of the forwarder module, a communication structure constituted by each group of leaf nodes has self-similarity, and the plurality of leaf nodes are in communication connection with the central node in a complete multi-way tree approach by means of the forwarder modules of multiple levels.