Abstract
In two-way relay channel (TWRC), terminal nodes exchange information assisted by a relay node. To exchange 1bit information over TWRC, the traditional save-and-forward scheme takes 4 time slots. The traditional network coding scheme can reduce the number of time slots to 3 since its relay node can mix the information from tow terminal nodes and then broadcast them in 1 time slot. Further, the physical network coding (PNC) and analog network coding (ANC) schemes, which allow terminal nodes send the signal simultaneously, only need 2 time slots to complete the information exchange. In this paper, by combining physical network coding and full-duplex (FD) techniques, the proposed scheme full-duplex physical network coding (FD-PNC) and full-duplex analog network coding (FD-ANC) can nearly reduce the required time slots to 1. Therein, full-duplex technology can make the nodes send and receive the signal at the same time and in the same frequency band by eliminating the self interference signal. Considering the channel error, we analyze their achievable throughput under the symmetric channel. We believe that taking full-duplex technology into network coding research may open many possibilities for future work.
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