A Framework for Development and Evaluation of a Dynamic Subchannel Allocation Scheme in an OFDMA System

This paper presents a framework for allocating radio resources to the Access Points (APs) introducing an Access Point Controller (APC). Radio resources can be either time slots or sub-channels. The APC assigns sub-channels to the APs using a dynamic sub-channel allocation scheme. The developed framework evaluates the dynamic sub-channel allocation scheme for a downlink multi-cellular Orthogonal Frequency Division Multiple Access (OFDMA) system. In the considered system, each AP and the associated Mobile Terminals (MTs) are not operating on a frequency channel with fixed bandwidth, rather the channel bandwidth for each AP is dynamically adapted according to the traffic load. The sub-channels assignment procedure is based on quality estimations due to the interference measurements and the current traffic load.