Journal
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Volume 14, Issue 7, Pages 3601-3613Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2015.2408338
Keywords
Full-duplex; power control; MAC protocol; wireless network
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2014R1A2A2A01006002]
- NSF [CNS-1161596, CNS-1314822]
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [1314822] Funding Source: National Science Foundation
- National Research Foundation of Korea [2014R1A2A2A01006002] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Recent advances in signal processing have demonstrated in-band full-duplex capability at WiFi ranges. In addition to simultaneous two-way exchange between two nodes, full-duplex access points can potentially support simultaneous uplink and downlink flows. However, the atomic three-node topology, which allows simultaneous uplink and downlink, leads to inter-client interference. In this paper, we propose a random-access medium access control protocol using distributed power control to manage inter-client interference in wireless networks with full-duplex-capable access points that serve half-duplex clients. Our key contributions are two-fold. First, we identify the regimes in which power control provides sum throughput gains for the three-node atomic topology, with one uplink flow and one downlink flow. Second, we develop and benchmark PoCMAC, a full 802.11-based protocol that allows distributed selection of a three-node topology. The proposed MAC protocol is shown to achieve higher capacity as compared to an equivalent half-duplex counterpart, while maintaining similar fairness characteristics in single contention domain networks. We carried out extensive simulations and software-defined radio-based experiments to evaluate the performance of the proposed MAC protocol, which is shown to achieve a significant improvement over its half-duplex counterpart in terms of throughput performance.
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