OBS/OPS network performance optimizing method based on virtual node

Abstract

A method for optimizing OBS / OPS network performance based on virtual node includes combining a numbers of physical nodes on service shortest route to be one virtual node according to network service flow rate of last statistic time section , setting special wavelength to connect head and tail physical node in virtual node to let data packet jump over at least two physical nodes with only one time of processing when data packet is via this virtual node for lowering end to end time delay and packet lost rate in network .

Description

technical field [0001] The present invention relates to a method in the field of network technology, in particular to a virtual node-based OBS / OPS network performance optimization method. technical background [0002] Optical Burst Switching (OBS) is a new optical switching technology emerging in recent years. The basic principle of OBS is that data and control information are transmitted in separate channels. The edge node of OBS assembles several IP packets into a burst packet, and performs optical / electrical conversion, processing, and After reserving the bandwidth resource, the edge nodes of the network transmit the data assembled into burst packets, the data can always be kept in the optical domain, and avoid the trouble of processing the packet headers one by one in the packet switching, and also avoid or reduce the cost at the core node of the network. The need for an optical cache. The only difference between Optical Packet Switching (OPS) and traditional electric...

AI Technical Summary

Problems solved by technology

But in the OBS / OPS network, the situation is different: first, the wavelength in the OBS / OPS network is not like the wavelength in the OCS network, which is established according to the end-to-end service requirements through the call-resource reservation-confirmation mechanism. All wavelengths in the / OPS network can be used after the network is established. Idle these wavelengths will not bring about a reduction in network usage costs; secondly, optical burst packets / optical packets are different from IP packets in the electrical domain. On the switching link of the domain, the optical burst packet / optical packet can only be carried on the WDM network; again, the service in the OBS / OPS network does not need to be established through the call-response process, so the GMPLS protocol is not always applicable In the OBS / OPS network; finally, because one of the most important features of OBS / OPS is the statistical multiplexing of bandwidth, the greater the number of wavelengths that can participate in statistical multiplexing, the lower the possibility of network congestion, so in OBS / OPS In the OPS network, using a single wavelength to directly connect the source-sink node pair does not always improve the network performance, but may increase the packet loss rate of the network.

Images