In networks without a hierarchy, any wireless device in the network can work as relay. In hierarchical multihop networks, only special devices provide relaying functionality.

In this paper, we study a decode-and-forward twoway 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 sele

Asynchronous Physical-layer Network Coding Scheme for Two-way OFDM Relay

In this letter, we consider a half-duplex amplify-andforward two-way relaying network consisting of two sources with each having a single antenna and one relay having two antennas. For such a system, a distributed orthogonal space-time block code (