Decode-and-forward two-way relaying with network coding and opportunistic relay selection

Authors:
Qing F. Zhou;Yonghui Li;Francis C. M. Lau;Branka Vucetic
Affiliations:
The Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong;The School of Electrical and Information Engineering, University of Sydney, NSW, Australia;The Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong;The School of Electrical and Information Engineering, University of Sydney, NSW, Australia
Venue:
IEEE Transactions on Communications
Year:
2010

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Abstract

In this paper, we study a decode-and-forward two-way relaying network. We propose an opportunistic two-way relaying (O-TR) scheme based on joint network coding and opportunistic relaying. In the proposed scheme, one single "best relay" is selected by MaxMin criterion to perform network coding on two decoded symbols sent from two sources, and then to broadcast the network-coded symbols back to the two sources. The performance of the proposed scheme is analyzed, and verified through Monte Carlo simulations. Results show that the proposed scheme achieves a better performance compared to the fullydistributed space-time two-way relaying (FDST-TR), which has been identified as the best decode-and-forward two-way relaying method so far.