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Grant-sizing-differentiated bandwidth allocation algorithm for the coexistence of ONUs with and without wavelength tunability in WDM/TDM PONs

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Abstract

Adopting the pay-as-you-grow approach to upgrade passive optical network (PON) facilities by WDM technology insures the smoothness of the upgrade, and also results in the coexistence of wavelength-fixed/tunable optical network units (ONUs) in WDM/TDM PONs. Dynamic bandwidth allocation (DBA) is the key to support such coexistence of heterogeneous ONUs. Thus, DBA is also the key to support the smooth evolution of PONs. To more fairly coordinate the bandwidth allocation among the coexisting heterogeneous ONUs, a differentiated grant sizing (DGS) scheme is proposed. In DGS, not only the fairness between the wavelength-fixed/tunable ONUs but also the fairness between the lightly/heavily loaded ONUs is taken into account. To further carry out load balancing among wavelengths, a grant scheduling scheme is also proposed to cooperate with the grant sizing scheme. In the grant scheduling scheme, a measure of the ONUs’ flexibility is given, and then the least flexible job first rule (LFJF) is adopted for joint wavelength and time-slot assignment. Finally, to demonstrate the effectiveness of the proposed algorithm, a series of comparative analyses is conducted based on simulation experiments.

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Funding

This work is supported by Programs of the Natural Science Foundation of China (Project No. 61420106011, 61601279, 61601277) and the Shanghai Science and Technology Development Funds (Project No. 17010500400, 18511103400, 15530500600, 16511104100, 16YF1403900).

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Authors and Affiliations

  1. Key laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China

    Yuqi Yan, Chaoqin Gan, Zongkang Liu, Xingfeng Li & Hubao Qiao

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  1. Yuqi Yan
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  2. Chaoqin Gan
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  3. Zongkang Liu
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  4. Xingfeng Li
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  5. Hubao Qiao
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Corresponding author

Correspondence to Chaoqin Gan.

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Yan, Y., Gan, C., Liu, Z. et al. Grant-sizing-differentiated bandwidth allocation algorithm for the coexistence of ONUs with and without wavelength tunability in WDM/TDM PONs. Ann. Telecommun. 73, 759–768 (2018). https://doi.org/10.1007/s12243-018-0652-5

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  • DOI: https://doi.org/10.1007/s12243-018-0652-5

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