Throughput-Aware and Interference-Aware RRM Techniques for OFDMA-Based Networks

This paper presents techniques for performing radio resource allocation in orthogonal frequency-division multiple-access networks. They are throughput-aware and interference-aware adaptive water-filling schemes for conventional (non-relay) cellular networks and threshold-based distributed radio resources management scheme for relay-based networks. The strategy is to exploit (a) the coarse granularity of the practical throughput curve for the non-relay-based networks and (b) the system interference dynamics in relay networks. Firstly, the numerical results show a significant improvement in throughput using the proposed schemes. Secondly, they provide insight into the potential performance improvements from a two-hop relaying scheme with a simple distributed resource management policy. And thirdly, they demonstrate that some simple but moderately interference-smart algorithms are enough to provide sufficiently good results for future broadband wireless networks.