QoS-Enabled Dynamic Resource Management in Multi-Cell OFDMA-Based Systems

In this paper, we propose a novel cross-layer framework, which includes a two-level resource management to efficiently allocate subchannels among cell BSs (at the super-frame level) and do resource scheduling (at frame level) among intra-cell users based on channel condition and QoS requirement, and a system-level call admission control. The coordination among a plurality of BSs in the OFDMA-based network is realized at a controller. This framework improves the system throughput while maintaining the QoS requirement of mobile users. Our evaluations show that the proposed framework can improve the global resource utilization, reduce the packet loss rate, and improve the cell-edge user performance for different deployment scenarios. In addition, the dynamic resource management algorithm decouples the functionality of the controller and the BS so it is practical to implement in a real system.