Cascade type optical label encoding/decoding method and codec

Abstract

The invention relates to a method for coding and decoding an optical label. The method comprises the following steps: first, optical fiber Bragg grating is adopted as a coder-decoder of the optical label; connection type coding and decoding information is inscribed on the fiber grating by a phase mask plate, wherein the connection type coding and decoding information is the connection of a plurality of orthogonal code words. The technical proposal of the invention also provides a corresponding coder-decoder. The technical proposal effectively avoids frequently updating a multicast routing forward table in an optical multicast network and introduces a quick and adjustable decoder by integrating a plurality of target address information into a connection type optical label, thereby greatly simplifying a network node structure.

Description

technical field [0001] The invention relates to the technical field of optical multicast based on packet switching, in particular to a cascading optical label encoding and decoding method and an encoding and decoding device. Background technique [0002] The label based on optical orthogonal code (abbreviated as optical code label) has become a promising label processing technology in the field of optical packet switching because it can easily realize the all-optical identification of the label by using codec technology. Applying the optical code label to the optical multicast network based on packet switching can overcome the problem of limited wavelength resources in the traditional wavelength-based multicast. However, because each optical code label can only provide 1-bit information (matching or not matching) when it is identified, it still has some limitations in the field of optical multicasting. Currently, the optical code label is generally used to mark a multicast ...

AI Technical Summary

Problems solved by technology

Since the multicast group will be invalid when the multicast service ends, a fast and adjustable decoder is required at each node of the multicast network, and the multicast routing forwarding table also needs to be continuously updated according to the change of the service, which leads to The complexity of the node is greatly increased

Therefore, there are still problems in the practicality of the traditional optical multicast based on optical code labels.

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