Throughput maximization with buffer constraints in broadband OFDMA networks

The paper presents a radio resource allocation scheme for OFDMA-based wireless broadband networks. The problem of maximizing the base-station packet throughput subject to individual users´ outage probability constraints is formulated. The proposed algorithm assumes a finite buffer for the arrival packets and allocates the radio resource based on users´ channel characteristics and traffic patterns. By performing the radio resource allocation in two steps, namely bandwidth allocation and channel assignment, admission control is realized with low complexity. Simulations show that the algorithm yields significant lower outage probability and higher throughput compared to existing multiple access methods.