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Study on the problem of routing, wavelength, and time-slot assignment towards optical time-slot switching technology

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Abstract

Conventional optical burst switching (OBS) is incapable of providing connection-oriented service, and burst loss is more likely to occur with increasing of traffic load due to its inherent architecture where the burst size is variable. In this paper, we propose and evaluate the optical time-slot switching technology, in which the fixed-size time-slot is adopted as the basic switching granularity, and switching is done in the time domain, rather than the wavelength domain. Also, we prove that time-slot switching has an equivalent function to eliminate data conflict relative to wavelength converter. Subsequently, the routing, wavelength, and time-slot assignment problem is studied in this paper. An adaptive weight function is introduced to the routing and wavelength selection algorithm, then several useful approaches, such as the train approach, wagon approach and p-distribution approach, are presented for time-slot assignment and scheduling. The results show that our scheme can perform better than conventional OBS in the aspect of blocking performance, quality of service, and class of service.

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Authors and Affiliations

  1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China

    Guangjun Shan & Guangxi Zhu

  2. College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, China

    Guangjun Shan & Deming Liu

  3. Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China

    Guangxi Zhu

Authors
  1. Guangjun Shan
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  2. Guangxi Zhu
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  3. Deming Liu
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Corresponding author

Correspondence to Guangjun Shan.

Additional information

This work is jointly supported by the Natural Science Foundation of China (60496315, 60802009), National 863 project of China (2008AA01Z204, 2009AA01Z205) and International Cooperation in Science and Technology Project (2008DFA11630).

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Shan, G., Zhu, G. & Liu, D. Study on the problem of routing, wavelength, and time-slot assignment towards optical time-slot switching technology. Photon Netw Commun 22, 162–171 (2011). https://doi.org/10.1007/s11107-011-0316-0

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  • DOI: https://doi.org/10.1007/s11107-011-0316-0

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