標題: Inter-Client Interference Cancellation for Full-Duplex Networks With Half-Duplex Clients
作者: Lin, Kate Ching-Ju
Hsu, Kai-Cheng
Wei, Hung-Yu
資訊工程學系
Department of Computer Science
關鍵字: Communication networks;Interference cancellation;access protocol
公開日期: 1-Oct-2019
摘要: Recent studies have experimentally shown the gains of full-duplex radios. However, due to its relatively higher cost and complexity, we can envision a more practical step in the network evolution is to have a full-duplex access point (AP) but keep the clients half-duplex. Unfortunately, the full-duplex gains can hardly be extracted in practice as the uplink transmission from a half-duplex client introduces inter-client interference to another downlink client. To address this issue, we present the design and implementation of IC2 (Inter-Client Interference Cancellation), the first physical layer solution that exploits the AP's full-duplex capability to actively cancel the interference at the downlink client. Such active cancellation not only improves the achievable capacity, but also better tolerates imperfect user pairing, simplifying the MAC design as a result. We build a prototype of IC2 on USRP-N200 and evaluate its performance via both testbed experiments and large-scale trace-driven simulations. The results show that, without IC2, about 60% of client pairs produce no gain from full-duplex transmissions, while, with IC2 the median gain of the achievable rate over conventional half-duplex networks can be 1.65x and 1.47x for 1- and 2-antenna scenarios, respectively, even when clients are simply paired randomly.
URI: http://dx.doi.org/10.1109/TNET.2019.2940048
http://hdl.handle.net/11536/153363
ISSN: 1063-6692
DOI: 10.1109/TNET.2019.2940048
期刊: IEEE-ACM TRANSACTIONS ON NETWORKING
Volume: 27
Issue: 5
起始頁: 2150
結束頁: 2163
Appears in Collections:Articles