Real-time implementation of physical-layer network coding
Refereed conference paper presented and published in conference proceedings

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AbstractThis paper presents the first real-time physical-layer network coding (PNC) prototype for the two-way relay wireless channel (TWRC). Theoretically, PNC could boost the throughput of TWRC by a factor of 2 compared with traditional scheduling (TS) in the high signal-to-noise (SNR) regime. Although there have been many theoretical studies on PNC performance, there have been few experimental and implementation efforts. We built the first prototype of PNC about a year ago. It was, however, an offline system in which an offline PNC decoder was used at the relay. For a real-time PNC system, there are many additional challenges, including the needs for tighter coordination of the transmissions by the two end nodes, fast real-time PNC decoding at the relay, and a PNC-compatible retransmission scheme (i.e., an ARQ protocol) to ensure reliability of packet delivery. In this paper, we describe a real-time PNC prototype, referred to as RPNC, that provides practical solutions to these challenges. Indoor environment experimental results show that RPNC boosts the throughput of TWRC by a factor of 2 compared with TS, as predicted theoretically. RPNC prototype provides an interface to the application layer, with which we demonstrate the exchange of two image data files between the two end nodes. © 2013 ACM.
All Author(s) ListLu L., You L., Yang Q., Wang T., Zhang M., Zhang S., Liew S.C.
Name of Conference2013 2nd ACM SIGCOMM Workshop on Software Radio Implementation Forum, SRIF 2013
Start Date of Conference12/08/2013
End Date of Conference12/08/2013
Place of ConferenceHong Kong
Country/Region of ConferenceHong Kong
Pages71 - 76
LanguagesEnglish-United Kingdom
KeywordsNetwork coding, Physical-layer network coding, Realtime, Soft demodulation

Last updated on 2020-02-12 at 00:39