Full-Duplex Communication Strategies in Cellular Networks

Full-duplex communication enables simultaneous transmission and reception on the same frequency band, offering the potential to double spectral efficiency compared with conventional half-duplex systems. The principal challenge is mitigation of self-interference, which arises when a node’s transmitted signal is coupled into its receiver chain. Recent advances in analogue and digital self-interference cancellation techniques have reduced residual interference to manageable levels, permitting practical deployment. Strategies now extend across a range of cellular architectures, from macro- and small-cell base stations to device-to-device (D2D) underlay scenarios. In dense heterogeneous networks, full-duplex small cells can enhance capacity while coordinated interference management and linear precoding schemes maintain quality of service on both uplink and downlink. In the D2D underlay context, integration of full-duplex transceivers is complemented by resource-allocation algorithms that jointly optimise power and channel assignment under quality-of-service constraints. Mode-selection frameworks dynamically switch between half- and full-duplex operation to exploit instantaneous channel conditions. Furthermore, network-level approaches such as interference alignment and advanced MIMO precoding help to suppress inter-cell and cross-mode interference, ensuring that spectral gains persist in multi-cell deployments. Collectively, these strategies point towards the realisation of high-throughput, low-latency links required for emerging 5G and future 6G applications, including ultra-reliable low-latency communications, massive access and edge computing.

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Full-Duplex Communication Strategies in Cellular Networks publication trend

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Technical terms

Full-duplex (FD): Communication mode allowing simultaneous transmission and reception on the same frequency band, aiming to double spectral efficiency.

Self-interference (SI): Unwanted coupling from a node’s transmitter into its own receiver, necessitating cancellation techniques to enable full-duplex operation.

Device-to-device (D2D) communications: Direct links between user equipment underlaying the cellular network, often used to offload traffic and reduce latency.

Difference-of-convex (D.C.) programming: An optimisation approach that decomposes non-convex problems into the difference of two convex functions, facilitating iterative solution methods.

Interference alignment: Technique to coordinate transmissions so that interference occupies a reduced-dimensional subspace, thereby preserving desired signal dimensions.

References

1. Spectrum-Efficient Transmission Mode Selection for Full-Duplex-Enabled Two-Way D2D Communications. IEEE Access (2020).
2. An Adaptive Full-Duplex/Half-Duplex Multiuser Cooperative D2D Communications System With Best User Selection. IEEE Open Journal of the Communications Society (2021).
3. Performance Analysis of Multi-Cell Full-Duplex Cellular Networks. IEEE Access (2020).