Light burst/grouping switching structure without team head block

Abstract

This invention provides an optical burst / packet exchange structure without head block, which separates burst data of different wavelengths at the entry port with a WDM then to transform it to any wavelengths according to the dispatch with a wavelength converter to be selected on any FDL in P group by 1xp optical switch, finally to be sent to a related exit port from the selected FDL to reach the aim of switching the burst data of any wavelength of any entry port to any wavelength of any exit port via a controlled time delay.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and particularly relates to a switching structure design technology of a core switching node in an optical burst switching / packet network. Background technique [0002] With the maturity and wide application of dense wavelength division multiplexing (Dense Wavelength Divided Multiplex, DWDM) optical transmission technology and equipment, the demand for service switching directly at the optical layer is increasing. Therefore, all-optical "circuit" switching (so-called wavelength routing) and packet switching have received extensive attention and are considered an effective way to overcome the rate bottleneck of electrical switching. However, both of these exchange methods have their own drawbacks. On the one hand, with the explosive growth of packet services (especially IP services), it is generally believed that the future communication network design should be optimized to support...

AI Technical Summary

Problems solved by technology

This reduces the loss rate mentioned in the above structure, but introduces the problem of head-of-line blocking (for example, two burst data of the same wavelength sequentially coming from the same ingress port will arrive at different egress ports, if The burst data is delayed in the FDL so that it overlaps with the time when the subsequent burst data leaves the FDL, which will inevitably cause the subsequent burst data to be innocently discarded when the switching plane is originally idle)

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