CTH13-2: Relay Channel with Private Messages

We introduce a relay channel with private messages, where three concurrent communication tasks take place: in addition to the traditional communication from source to destination (assisted by relay), the source has a private message for the relay, and the relay has a private message for the destination. We develop coding strategies for this channel based on decode-and- forward and compress-and-forward schemes. Achievable rate regions are obtained for the discrete memoryless and Gaussian versions of this channel. Our work generalizes some of the results obtained in the original relay channel introduced by Cover and El-Gamal and in the recent works on relay broadcast channels.