Downlink dynamic resource allocation for multi-cell OFDMA system

This paper presents an OFDMA radio resource control (RRC) scheme where dynamic resource allocation is realized at both a radio network controller (RNC) and base stations (BTSs). The scheme is semi-distributed in the sense that the RNC coordinates the mutual interference (inter-cell) at a super-frame level, whereas each BTS makes faster frame-level channel assignment decision based on the resources´ utility value to the users. Another contribution of the paper is a set of computationally efficient (linear-time) algorithms that perform dynamic channel allocation at the RNC and BTSs. Simulations show that the algorithm yields excellent performance for both real-time and non real-time services, even under very fast fading.