Self-organizing Dynamic Fractional Frequency Reuse on the uplink of OFDMA systems

Reverse link (or uplink) performance of cellular systems is becoming increasingly important with the emergence of new uplink-bandwidth intensive applications such as Video Share [13], where end users upload video clips captured through their mobile devices. In particular, it is important to design the system to provide good user throughput in most of coverage area, including at the cell edge. Soft fractional frequency reuse (FFR) is one of the techniques for mitigating intercell interference in cellular systems, leading to overall spectral efficiency enhancements and/or cell edge throughput improvements. We propose a novel algorithm that dynamically creates efficient soft FFR patterns on the uplink of orthogonal frequency division multiple access (OFDMA) based cellular systems; this allows the system to “automatically” adapt to user traffic distribution and system layout. Our algorithm is based on systematically ascending towards a local maximum of the systemwide sum of user utili...

• Type: Journal
• Year: 2010
• Where: CISS
• Authors: Balaji Rengarajan, Alexander L. Stolyar, Harish Viswanathan
• Keywords: CISS 2010, Frequency Division Multiple Access, Information Technology, Time Slots, Typical Scenarios