SINR Prediction Versus Reverse Reporting for Soft Reuse and Interference Management

Abstract:
We investigate inter-cell interference management based on two methods: instantaneous signal-to-interference plus noise (SINR) prediction and reverse reporting. Reverse reporting, a concept where vulnerable receivers announce themselves, is a common approach. SINR prediction is an alternative solution which brings the decision responsibility to the receiver. This has a positive effect on the system performance as receiver has more crucial information at its disposal than the transmitter. The paper proposes a protocol with both SINR prediction and reverse reporting as interference management phases implemented by sounding the channel with orthogonal sequences, but focuses mainly on situations when only one of them is active. We simulate the two approaches in WINNER based indoor scenario and compare them in terms of spectral efficiency and user fairness. SINR prediction comes out superior as it achieves significantly higher spectral efficiency for the price of only small decrease in fairness.