Achievable rates for three-user two-way cooperative relay broadcast channels

In this paper, we investigate the achievable rate regions of three-user two-way cooperative relay broadcast channels. We present two system models, the two-way partially cooperative relay broadcast channel and the two-way fully cooperative relay broadcast channel. In the first system, one user relays information to assist two other users and the two other users also relay information to the first user, but these two users do not assist each other. In the second system, these two users assist each other as well. In this case, three users simultaneously cooperate both in pairs. The achievable rate regions for these two different channel models are derived in the discrete memoryless case.