Optical-codeword-label-based optical packet multicast transmission and receiving methods and devices

Abstract

The invention discloses an optical-codeword-label-based optical packet multicast transmission method, an optical-codeword-label-based optical packet multicast transmission device, an optical-codeword-label-based optical packet multicast receiving method and an optical-codeword-label-based optical packet multicast receiving device. An optical codeword label in the methods and the devices consists of a network optical label and a node optical label, and the optical codeword labels of all destination nodes in a multicast group form an optical codeword label group. The optical codeword label group is generated for a data packet at an edge node, and is added in front of a carrier signal to form an optical packet signal with multicast capability, and the optical packet signal is simultaneously transmitted to all the destination nodes in the multicast group. The multicast group can be flexibly created, changed or canceled by regulating the composition of the optical codeword label group. By the methods and the devices, the utilization efficiency of optical codewords is improved, the total number of the optical codewords required by a system is decreased, and simultaneously, label switching is not required in node routes of optical packets in each sub-network, and only a packet forwarding function is required to be finished.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication. In particular, it relates to an optical packet multicast sending and receiving method and device thereof based on an optical codeword label in an optical packet switching network. Background technique [0002] In recent years, with the huge growth of communication data services, Optical Packet Switching Network (OPS) has received more and more attention. In order to overcome the electronic bottleneck, various technologies for directly routing and switching information at the optical layer have been proposed one after another. Generalized Multiprotocol Label Switching (GMPLS), as an important technology in the IP over WDM network control plane, has packet data exchange methods based on time division, wavelength division and optical fiber. But in the establishment of the optical path, the wavelength is still considered as the smallest data granular unit. However, in the end-t...

AI Technical Summary

Problems solved by technology

The problem is that when the multicast group changes, the multicast routing table of each node route needs to be updated, which causes the structure change of the optical label generation module, which makes the node route need to perform complex label exchange and route update processing

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