Distributed resource allocation for rate-constrained users in multi-cell OFDMA networks

This letter addresses resource allocation in multi-cell OFDMA networks. It describes a heuristic for distributed sum power minimization under target data rate requirements. The proposed method establishes a set of target SINR per user and subcarrier, determined to reach the target data rate of each user, while avoiding power divergence situations. Power control can then be performed independently over each subcarrier. Compared to iterative water-filling, this method proves to be very efficient at any load in terms of resource consumption and users' rejection.