Interchanger internal bus structure based on exchange control words

The invention provides an interchanger internal bus structure based on exchange control words. According to the interchanger internal bus structure, expansion is carried out on the basis of an exchange data bus, control information, state information and data are adopted and share a data bus and adopt one-way transmission, and the exchange and control of exchange data with different lengths and different control requirements as well as the updating and transmission of different-state information and time information are realized. Through the expansion of the exchange control words, the routing control, the priority control, the online configuration, the online time recording and measurement of an interchanger and the collection and management of error information and stage information can be realized, and a design scheme is provided for the design of different-scale and different-purpose interchangers.