Joint Resource Allocation for Multiuser Two-Way OFDMA Relay Networks with Proportional Fairness

In this paper, we investigate a joint resource allocation for a multiuser two-way OFDMA relay network. To reduce the computational complexity, we separate the joint resource allocation into two stages, subcarrier allocation and power allocation, and propose resource allocation schemes. In the proposed schemes, resources are allocated to the user-pairs and relays to maximize the achievable sum-rate over all user-pairs under proportional fairness constraints. Simulation results show that the proposed schemes achieve higher spectral efficiency and fairness index, and lower outage probability compared with the static scheme.