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Beam-Hopping-Based Resource Allocation in Integrated Satellite-Terrestrial Networks.

Mengying Zhang1,2, Xiumei Yang1,2, Zhiyong Bu1,2,3

  • 1Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

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Summary

This study introduces resource allocation algorithms for integrated satellite-terrestrial networks (ISTNs) using beam-hopping technology. The proposed methods enhance spectrum efficiency and user fairness in next-generation communication systems.

Keywords:
beam-hoppingintegrated satellite-terrestrial networkresource allocationspectrum sharing

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Area of Science:

  • * Next-generation communication networks
  • * Integrated satellite-terrestrial networks (ISTNs)

Background:

  • * Scarce spectrum resources and uneven traffic demand challenge ubiquitous connectivity.
  • * Integrated satellite-terrestrial networks (ISTNs) offer a solution for high-data-rate connectivity.
  • * Beam-hopping (BH) technology enables flexible scheduling for shared spectrum use.

Purpose of the Study:

  • * To develop resource allocation algorithms for ISTNs sharing frequency bands.
  • * To improve spectrum efficiency and user fairness in ISTNs.
  • * To address co-channel interference between satellite and terrestrial systems.

Main Methods:

  • * Formulation of two resource allocation problems: maximizing weighted sum capacity (MWSC) and maximizing minimum capacity-to-demand ratio (MMCDR).
  • * Reformulation of problems as mixed-integer linear programming (MILP) for optimal solutions.
  • * Development of two greedy suboptimal algorithms for MWSC and MMCDR to reduce computational complexity.

Main Results:

  • * Dynamical protection zones effectively mitigate co-channel interference.
  • * Proposed algorithms achieve higher spectrum efficiency compared to traditional methods.
  • * Algorithms ensure fairness between satellite and terrestrial systems.
  • * Greedy algorithms demonstrate performance comparable to optimal solutions with significantly lower complexity.

Conclusions:

  • * The developed resource allocation algorithms are effective for ISTNs.
  • * Beam-hopping technology enhances spectrum efficiency and fairness in integrated networks.
  • * Greedy algorithms provide a practical and efficient approach for resource management in ISTNs.