Method for implementing outburst packet delay and core node

Abstract

The invention discloses a method for implementing forward delay of burst, and a core node. In the invention, the core node provided with FDL can initiatively carry out delay processing to the burst to be overlapped when overlapping of the burst will occur on a to-be-protected link thereof so as to reduce possibility of occurrence of burst confliction on a downstream to-be-protected link. The corenode can transmit a burst delay request to an upstream core node when it finds burst confliction will occur at self out-port at a coming moment, and request the core node provided with the FDL and having delay capacity to help to delay the burst. The method fully utilizes the FDL provided in the network and reduces probability of burst confliction.

Description

technical field [0001] The invention relates to optical communication technology, in particular to a method and a core node for realizing forward delay of burst packets. Background technique [0002] figure 1 Shown is a schematic structural diagram of an OBS (Optical burst switching, optical burst switching) network. It can be seen from the figure that the OBS network is composed of an edge node (Edge router) and a core node (Core router). The edge node is used to assemble the input IP packets into burst packets, and schedule the generated burst packets to output wavelengths. The core node is mainly used to switch the corresponding burst packet from the input port to the appropriate output port according to the information carried in the BHP (Burst header packet). In addition, the core node is also used to handle burst packet conflicts. To achieve higher switching throughput. The core node will receive the BHP that arrived earlier before forwarding the burst packet. The i...

AI Technical Summary

Problems solved by technology

However, the BORA algorithm mainly applies the scheduling technology to the edge nodes, and does not give full play to the role of the core nodes.

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