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Resource Allocation for Reconfigurable Intelligent Surface Assisted Dual Connectivity.

Yoghitha Ramamoorthi1, Masashi Iwabuchi1, Tomoki Murakami1

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Summary

Reconfigurable intelligent surfaces (RISs) and dual connectivity (DC) enhance 6G wireless networks. The proposed RIS-assisted DC system significantly boosts user throughput by optimizing resource allocation and user scheduling.

Keywords:
RIS-assisted DCbase stationcoveragedual connectivity (DC)fairnessreconfigurable intelligent surface (RIS)resource allocationthroughputuser scheduling

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Area of Science:

  • Wireless Communication Engineering
  • Signal Processing
  • Network Optimization

Background:

  • Next-generation 6G wireless systems demand higher reliability and capacity.
  • Reconfigurable Intelligent Surfaces (RISs) offer channel control by manipulating electromagnetic signal properties.
  • Dual Connectivity (DC) enhances user throughput by integrating resources from multiple base stations.

Purpose of the Study:

  • To propose and analyze a RIS-assisted DC system for improved per-user throughput in 6G networks.
  • To formulate and solve the joint resource allocation and user scheduling optimization problem.
  • To evaluate the system's performance under various network conditions and fairness constraints.

Main Methods:

  • Formulation of an optimization problem for joint resource allocation and user scheduling.
  • Derivation of optimal user scheduling time fractions.
  • Development of a heuristic algorithm to solve the optimization problem.
  • Extensive simulations to assess coverage and throughput.

Main Results:

  • The proposed RIS-assisted DC system demonstrates significant throughput gains.
  • Achieved throughput improvements of 52% and 48% compared to benchmark and DC systems in specific scenarios.
  • Performance analysis across varying densities of users, base stations, blockages, and RISs.

Conclusions:

  • The RIS-assisted DC system is a promising solution for enhancing 6G wireless network performance.
  • Optimized resource allocation and user scheduling are crucial for maximizing throughput gains.
  • The proposed system offers substantial benefits over existing wireless communication technologies.