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Interference mitigation in intentional jammers aided non-uniform heterogeneous cellular networks.

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Summary

This study optimizes fifth-generation (5G) networks by using small base station (SBS) muting and reverse frequency allocation (RFA) to reduce interference. These methods improve uplink coverage and signal-to-interference ratio (SIR) in macro base station (MBS) networks.

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Area of Science:

  • Telecommunications Engineering
  • Wireless Communication Systems

Background:

  • Fifth-generation (5G) networks employ small base stations (SBSs) alongside macro base stations (MBSs) for enhanced coverage and capacity.
  • Orthogonal frequency division multiple access (OFDMA) in 5G networks can lead to significant inter-cell interference (ICI).
  • The presence of intentional jammers further degrades uplink (UL) signal-to-interference ratio (SIR) through intentional jammers' interference (IJI).

Purpose of the Study:

  • To propose and evaluate novel interference mitigation techniques for 5G networks.
  • To address the combined challenges of inter-cell interference (ICI) and intentional jammers' interference (IJI).
  • To enhance the uplink (UL) coverage performance in 5G networks under interference conditions.

Main Methods:

  • Implementation of small base station (SBS) muting, specifically switching off SBSs near macro base stations (MBSs).
  • Application of reverse frequency allocation (RFA) as an interference management scheme.
  • Analysis of the proposed network model's performance under simulated interference scenarios.

Main Results:

  • SBS muting effectively reduces both inter-cell interference (ICI) and intentional jammers' interference (IJI).
  • Reverse frequency allocation (RFA) further mitigates residual ICI and IJI.
  • The combined techniques show potential for significant improvement in uplink (UL) signal-to-interference ratio (SIR).

Conclusions:

  • The proposed approach of SBS muting combined with RFA is effective in managing interference in 5G networks.
  • These interference mitigation strategies are crucial for improving uplink (UL) coverage and overall system performance.
  • The study provides a viable solution for enhancing 5G network resilience against both internal and external interference sources.