Pushing the limits of Full-duplex: Design and Real-time Implementation
arXiv:1107.0607
Abstract
Recent work has shown the feasibility of single-channel full-duplex wireless physical layer, allowing nodes to send and receive in the same frequency band at the same time. In this report, we first design and implement a real-time 64-subcarrier 10 MHz full-duplex OFDM physical layer, FD-PHY. The proposed FD-PHY not only allows synchronous full-duplex transmissions but also selective asynchronous full-duplex modes. Further, we show that in over-the-air experiments using optimal antenna placement on actual devices, the self-interference can be suppressed upto 80dB, which is 10dB more than prior reported results. Then we propose a full-duplex MAC protocol, FD-MAC, which builds on IEEE 802.11 with three new mechanisms -- shared random backoff, header snooping and virtual backoffs. The new mechanisms allow FD-MAC to discover and exploit full-duplex opportunities in a distributed manner. Our over-the-air tests show over 70% throughput gains from using full-duplex over half-duplex in realistically used cases.
12 page Rice University technical report
Cited by in corpus (19)
- Experiment-driven Characterization of Full-Duplex Wireless Systems
- Design and Characterization of a Full-duplex Multi-antenna System for WiFi networks
- Simultaneous Transmission and Reception: Algorithm, Design and System Level Performance
- MU-MIMO MAC Protocols for Wireless Local Area Networks: A Survey
- Outage Analysis of Full-Duplex Architectures in Cellular Networks
- Full Duplex Operation for Small Cells
- A Linearization Technique for Self-Interference Cancellation in Full-Duplex Radios
- Optimal Resource Allocation in Full-Duplex Wireless-Powered Communication Network
- Full-duplex in 5G Small Cell Access: SystemDesign and Performance Aspects
- Impact of Directionality on Interference Mitigation in Full-Duplex Cellular Network
- Exploiting Self-Interference Suppression for Improved Spectrum Awareness/Efficiency in Cognitive Radio Systems
- Full-Duplex Cloud Radio Access Network: Stochastic Design and Analysis
- Hybrid Scheduling in Heterogeneous Half- and Full-Duplex Wireless Networks
- Throughput Analysis for Wireless Networks with Full-Duplex Radios
- Distributed Full-duplex via Wireless Side Channels: Bounds and Protocols
- Virtual Full Duplex Wireless Broadcasting via Compressed Sensing
- Advanced Self-interference Cancellation and Multiantenna Techniques for Full-Duplex Radios
- Probabilistic Medium Access Control for Full-Duplex Networks with Half-Duplex Clients
- Full-duplex MAC Protocol Design and Analysis