Full Duplex Cloud Radio Access Networks: Performance Gains

The Full Duplex (FD) wireless terminals are capable of transmitting and receiving data simultaneously in the same frequency resources, however, it introduces self interference and co-channel interference. Even though various signal processing techniques are proposed to cancel the self interference, the bottleneck for FD performance in cellular systems is the co-channel interference from the other uplink and downlink signals. The Cloud radio access networks (C-RAN) coordinate transmission among base stations (BSs) and reduce the co-channel interference to a large extend. In this work we have studied performance gains of FD in reduced interference environment of C-RAN with fixed cluster size. We derived bound for signal-to-interference-plus noise ratio distribution and achievable rates for both uplink and downlink We show that FD in C-RAN can improve the cell edge as well mean rate. Our results suggest FD will be suitable for the high dense deployment of small cells with a practically feasible cooperation.