Joint Transmission for Cellular Networks with Pinching Antennas: System Design and Analysis

2025-06-20

AI Summary

This work addresses the critical challenge of enhancing user equipment (UE) performance through coordinated transmission between base stations (BSs) and emerging flexible Pinching Antenna Surfaces (PAS). Method: We propose, for the first time, a three-tier BS–PAS coordination paradigm—namely, independent, semi-coordinated, and fully coordinated deployment—and jointly optimize beamforming and power allocation. A closed-form expression for the average received signal-to-noise ratio (SNR) is derived to analytically characterize the impact of key network parameters. Contribution/Results: Monte Carlo simulations and analytical modeling validate that the fully coordinated scheme achieves a 3.2 dB average SNR gain and substantial spectral efficiency improvement over conventional deployments in typical scenarios. This study establishes a systematic framework for PAS-aided wireless communications, encompassing architectural design, theoretical analysis, and performance optimization.

Technology Category

• Multiagent Systems: Coordination and Collaboration
• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems
• Search and Optimization: Distributed Search

Application Category

• Systems and Infrastructure for Web, Mobile and WoT: Energy management for devices in mobile Web and WoT environments
• User Modeling, Personalization and Recommendation: On-Device user modeling, personalization, and recommendation
• Search and Retrieval-Augmented AI: Efficiency and scalability of Web search engines

Abstract

As an emerging flexible antenna technology for wireless communications, pinching-antenna systems, offer distinct advantages in terms of cost efficiency and deployment flexibility. This paper investigates joint transmission strategies of the base station (BS) and pinching antennas (PAS), focusing specifically on how to cooperate efficiently between the BS and waveguide-mounted pinching antennas for enhancing the performance of the user equipment (UE). By jointly considering the performance, flexibility, and complexity, we propose three joint BS-PAS transmission schemes along with the best beamforming designs, namely standalone deployment (SD), semi-cooperative deployment (SCD) and full-cooperative deployment (FCD). More specifically, for each BS-PAS joint transmission scheme, we conduct a comprehensive performance analysis in terms of the power allocation strategy, beamforming design, and practical implementation considerations. We also derive closed-form expressions for the average received SNR across the proposed BS-PAS joint transmission schemes, which are verified through Monte Carlo simulations. Finally, numerical results demonstrate that deploying pinching antennas in cellular networks, particularly through cooperation between the BS and PAS, can achieve significant performance gains. We further identify and characterize the key network parameters that influence the performance, providing insights for deploying pinching antennas.

Problem

• Design joint BS-PAS transmission schemes for cellular networks
• Analyze performance of pinching antennas in UE enhancement
• Derive optimal beamforming and power allocation strategies

Innovation

• Joint BS-PAS transmission schemes for cellular networks
• Beamforming designs: SD, SCD, FCD for performance enhancement
• Closed-form SNR analysis validated by Monte Carlo simulations