Non-blocking expandable multistage photoswitch array and working method thereof

Abstract

The invention belongs to the technical field of optical communication, and particularly relates to a non-blocking expandable multistage photoswitch array and a working method thereof. The multistage photoswitch array is provided with kN input terminals and kN output terminals, and comprises a packet network with kN input terminals and kN output terminals and a switching network consisting of k N*N non-blocking switching units A. The kN output terminals of the packet network are divided into k output groups. Any one input terminal selected can be connected to the output terminal of any one group of output groups. The N output terminals on each output group are connected with the N input terminals on the switching unit A orderly. The invention has the advantages that a novel network topological structure is put forward, wherein the structure combines the characteristic that mono-stage switching network is simple to control and the advantages of multistage switching network which is low in cost and complexity of hardware. A syncretic topological structure is put forward. The N*N structure is selectively expanded to the kN*kN structure agilely according to the current network traffic. The non-blocking expandable multistage photoswitch array provided by the invention is simple in swapping control and has strict non-blocking characteristics.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a non-blocking expandable multi-stage optical switch array and a working method thereof. Background technique [0002] Optical communication technology has been greatly developed since its birth in the 20th century. At present, the transmission capacity on the link in the optical network has exceeded the Tbit / s level, while the node processing capacity is mostly at the Gbit / s level. Therefore, the main bandwidth bottleneck of optical networks at this stage is the limitation of electronic processing capabilities in the optical / electrical / optical processes at nodes. To solve this problem, an optical cross-connect (OXC) for optical domain processing of signals at nodes is proposed. The optical cross-connect has multiple standard optical interfaces, which can controlly connect any optical fiber (or a certain wavelength signal) at the input end to any optic...

AI Technical Summary

Problems solved by technology

The higher the number of stages in the multi-level interconnection network, the greater the delay in connection establishment and signal transmission, the more serious the loss and interference of the signal during transmission, and the worse the reliability of the connection.

Images