Multicast Channel Communication with Interactive Receiver Cooperation over Orthogonal Links

Victor Exposito (1, 2) , Sheng Yang (1) , Nicolas Gresset (2)

1 L2S - Laboratoire des signaux et systèmes
2 MERCE-France - Mitsubishi Electric R&D Centre Europe [France]

We consider the multicast channel (MC), in which a transmitter broadcasts only a common message to two receivers. In our previous work, we have derived information-theoretic upper and lower bounds and showed that the two-round receiver cooperation (2RC) scheme, in which the receivers interactively perform compress-forward and then decode-forward, improves the MC achievable rate over different schemes from the literature, in the general case of full-duplex bi-directional non-orthogonal cooperation links. In this paper, we concentrate on the orthogonal cooperation to identify the properties of this interactive cooperation. We show that the full-duplexing between the cooperation links is not essential to take advantage of most of the gain offered by the 2RC full-duplex scheme, while the full-duplexing between the MC and the cooperation links brings most of the gain.

Domaines: Réseaux et télécommunications [cs.NI]; Théorie de l'information et codage [math.IT]

Victor Exposito, Sheng Yang, Nicolas Gresset. Multicast Channel Communication with Interactive Receiver Cooperation over Orthogonal Links. IEEE International Conference on Communications (ICC 2017), IEEE, May 2017, Paris, France. ⟨10.1109/ICC.2017.7996565⟩. ⟨hal-01504352⟩