Maximizing Sum-Rate for Multi-User Two-Way Relaying Networks with ANC Protocol
In this paper the authors study the resource allocation problem for an OFDMA based cooperative Two-Way Relaying (TWR) network. They focus on Amplify and Forward (AF) Analog Network Coding (ANC) protocol. An optimization problem for two basic resources namely, sub-carrier and power is formulated for multi-user TWR networks. A joint optimal optimization problem is investigated and two-step low complexity sub-optimal resource allocation algorithm is proposed for multi-user TWR networks with ANC protocol. The proposed algorithm has been evaluated in term of total achievable system sum-rate and achievable individual sum-rate for each user pair. The good trade-off between system sum-rate and fairness is observed in the two-step proportional resource allocation scheme.