Two Receiver Relay Broadcast Channel with Mutual Secrecy

摘要

We consider mutual secrecy requirements in a two receiver relay broadcast channel, where the dedicated relay is trusted by all parties. In our scheme, the relay decodes and forwards the respective messages to their intended destinations. Coherent transmission by the transmitter and relay is achieved by employing the Marton-Marton coding technique. Double random binning is then used to provide mutual secrecy. While our encoding is irregular, the decoding at the receivers employs forward sliding windows. This improves flexibility and reduces decoding delay when compared to backward decoding. This will be welcomed by wireless engineers. The multi-block equivocation calculation also has some features of interest.