Interference and Overhead Aware Flexible Duplexing for Distributed and Centralized Wireless Networks

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Abstract
This letter studies interference-aware flexible duplexing (FlexD) in multi-pair wireless networks under distributed (D-FlexD) and centralized (C-FlexD) coordination. Unlike prior FlexD studies, we explicitly incorporate contention and coordination overhead within each coherence block and analyze the resulting throughput outage and average throughput under full and partial channel state information (CSI). For D-FlexD, closed-form outage and rate expressions are derived using a geometric contention model, while for C-FlexD we obtain order-statistic outage expressions under centralized pair selection. High-SINR analysis reveals a geometry-limited outage floor. Numerical results validate the analysis and identify regimes where half-duplex (HD), FlexD, and full-duplex (FD) are preferred.
Funding Information
  • Australian Research Council (DP220103281)
  • and Future Fellowship (FT210100728)

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