Work

Sensing-Driven Spatial Reuse in Shared Spectrum: ns-3 Implementation and Evaluation of Radiation Null Steering

Year: 2025

Type: conference-paper

Abstract: Efficient coexistence management is essential for maximising spectrum utilisation in shared 5G New Radio-Unlicensed (NR-U) environments, where heterogeneous radio access technologies compete for the same channel resources.Conventional omnidirectional Listen-Before-Talk (LBT) mitigates persistent interference, yet fails to fully exploit the spatial reuse potential of active antenna arrays in dense deployments.This work introduces a practical null space projected LBT and digital precoder that jointly suppress interference from and toward coexisting nodes while remaining 3GPP-and regulatory-compliant. Implemented in ns-3 and 5G-LENA, systemlevel simulations demonstrate that the proposed approach enables concurrent transmissions, substantially enhances spatial reuse, and reduces latency compared to legacy LBT schemes.

DOI: 10.1145/3747204.3747207

Authors: George Frangulea, Philippos Assimakopoulos, Sandra Lagén, Biljana Bojović

Institutions: University of Kent, Centre Tecnologic de Telecomunicacions de Catalunya

Language: English

Topic: Cognitive Radio Networks and Spectrum Sensing

Subfield: Computer Networks and Communications

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Funders: Generalitat de Catalunya, Ministerio de Ciencia e Innovación, European Regional Development Fund, Agencia Estatal de Investigación

Awards: G1622782223, G2471925066, G3480869486, G4526231891, G7084143925, G8219384022, G8440920726

OpenAlex ID: W4413286664

FWCI:

Cites: 6

Cited by:

Related to: 10