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On the Practical Physical-Layer Network Coding with Partially Overlapped Packets

부분 패킷 중첩 환경에서 물리계층 네트워크 코딩에 관한 연구

Lim, Hyeonwoo;Jung, Bang Chul;Ban, Tae-Won;Sung, Kil-Young
임현우;정방철;반태원;성길영

  • Received : 2015.09.14
  • Accepted : 2015.10.08
  • Published : 2015.12.31

Abstract

In this paper, we investigate the physical layer network coding (PNC) technique in a two-way relay channel (TWRC) where two source nodes send and receive data with each other via a relay node. In particular, we consider the communication scenario where packet length from the two sources is different from each other. We analyze the bit error rate (BER) of the received packet at the relay node according to degree of overlapping between two packets. The BER of the short packet remains unchanged regardless of the degree of overlapping since the entire packet is overlapped with the longer packet, while the BER of the longer packet becomes improved as the degree of overlapping decreases. Thus, we need a novel transmission scheme to enhance BER performance of the PNC technique in TWRC environments since the overall BER performance of the PNC technique at the relay node depends on the worse BER between two ovelapping packets' BERs.

Keywords

Two-way relaying technique;physical-layer network coding;channel coding;packet overlapping

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Acknowledgement

Grant : Research on Near-Zero Latency Network for 5G Immersive Service

Supported by : IITP