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The Research of Ant Colony Algorithm in Routing of the Optical Burst Switching Network

Author: JiangHongJin
Tutor: ZhangXingZhou
School: Harbin Engineering University
Course: Optical Engineering
Keywords: optical burst switching networks routing and wavelength assignment ant colony algorithm blocking probability NS-2
CLC: TN929.1
Type: Master's thesis
Year: 2010
Downloads: 30
Quote: 0
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Abstract


With the popularity and deepening of the Internet, the number of users sharp increases in the Internet. The explosive growth of IP data traffic which results in the high blocking probability of the network needs to expand the channel capacity of the backbone network in the Internet. The WDM technology of simultaneously transmitting multiple different signals for a fiber can provide a huge channel capacity in order to sufficiently meet the high bandwidth and low latency demands of the IP data traffic, and is core technology for the backbone network of the Internet in the future.In the network of using WDM technology, there are optical circuit switching, optical packet switching and optical burst switching in the major optical switching technologys. Optical burst switching with an intermediate particle size of the exchange, is higher than optical circuit switching in the utilization rate of resource and easier to achieve than optical packet switching and the research focus of the next-generation optical networks. The model and the principles of optical burst switching network was introduced, the control protocol of the optical burst switching network was presented, and the characteristics of routing and wavelength assigenment problem was described in this article. The routing and wavelength assignment in optical burst switching network is a key issue. On the foundation of in-depth research and analysis of the performance of routing and wavelength assignment algorithm in common use, combined with the characteristics of optical burst switching networks to improve the basic ant colony algorithm, ant colony routing and random wavelength assignment algorithm in the optical burst switching network was proposed. The algorithm uses the information of wavelength channel spare degree of the local fiber-optic link in the network, dynamicly selects routing and assigns wavelength for burst data packets to balance the load of the network traffic, adapting the local dynamic changes of the network and reducing the blocking probability of burst data packets in the whole network. On the extended OBS-NS network simulation platform of NS-2, this algorithm and the shortest routing and random wavelength assignment algorithm was simulated, the result of simulation data showed that the burst blocking probability of the algorithm less than that of the shortest routing and random wavelength assignment algorithm.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications
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