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Network coding based all-optical multicast in WDM networks

The Journal of China Universities of Posts and Telecommunications 2015年第1期22卷 89-94页

作者： Qu Zhijian Zhang Xianwei Shi Shaojian Cao Yanfeng Zhao Mingbo School of Computer Science and Technology Shandong University of Technology

Wavelength division multiplexing （WDM） has been becoming a promising solution to meet the rapidly growing demands on bandwidth. multicast in WDM networks by employing free wavelength is an efficient approach to saving bandwidth and cost. However, the free wavelength may not identical between different hops in a multicast light-path, particularly in heavy load optical WDM networks. In order to implement multicast applications efficiently, a network coding （NC） technique was introduced into all-optical WDM multicast networks to solve wavelength collision problem between the multicast request and the unicast request. Compared with the wavelength conversion based optical multicast, the network coding based optical multicast can achieve better multicast performance with paying lower cost.

关键词： NC all-optical multicast WDM networks wavelength conversion

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维普期刊数据库

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Minimum coding nodes multicast tree for two-channel all-optical network coding scheme

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The Journal of China Universities of Posts and Telecommunications 2012年第3期19卷 114-121页

作者： QU Zhi-Jian BAI Lin ZHANG Li-kun School of Computer Science and Technology Shandong University of TechnologyZibo 255049China Beijing University of Posts and Telecommunications Beijing 100876China The Translation Group of the Certain Deparment of the Second Artillery ofPLA Beijing 100015China

A heuristic algorithm of establishing a minimum coding nodes multicast tree on which a two-channel all-optical network coding scheme can be performed is presented. To minimize the coding nodes, the heuristic graph-search control strategies are investigated. Firstly, a minimum relatedness principle is proposed to balance and minimize the out-degrees of the conventionally directed multicast tree. Secondly, a set of rules about bottom-up path search are presented to recover another path in the conventionally directed multicast tree, and a conflict-backtracking principle is given to minimize the coding nodes in this process. To evaluate the algorithm, some results are given. The results indicate that the algorithm can perform the expected function. Moreover, to further test and verify the algorithm, performances of different multicast modes are compared and analyzed. The results show that the multicast performances will be impaired if a multicast tree contains redundant coding nodes.

关键词： network coding multicast tree heuristic algorithm all-optical multicast

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维普期刊数据库

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Design of a node architecture for logic-calculation Nased all-optical network coding scheme

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The Journal of China Universities of Posts and Telecommunications 2013年第5期20卷 110-116,128页

作者： QU Zhi-jian XIE Yin-bao WANG Ju-hui LIU Xiao-hong School of Computer Science and Technology Shandong University of Technology

Network coding brings many benefits for multicast networks. It is necessary to introduce network coding into optical networks. Nevertheless, the traditional network coding scheme is hard to be implemented in optical networks because of the weak operation capability in photonic domain. In the paper, we focused on realizing two-channel network coding in all-optical multicast networks. An optical network coding scheme which can be realized via logic shift and logic XOR operations in photonic domain was proposed. Moreover, to perform the network coding scheme the coding node structure was designed and the operation principle and processes were illustrated in detail. In the end of the paper, the performance and the cost of different all-optical multicast mode were compared and analyzed.

关键词： network coding optical logic calculation coding node all-optical multicast

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维普期刊数据库

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