Performance Analysis of Fiber-Optic Inband Relaying against Both Self- and Inter-Cell Interference

Relaying is a key technology used to improve cell-edge user throughput and/or provide wider coverage. We propose a new type of fiber-optic relaying, which is intended to extend the coverage to heavily shadowed areas. We established a design method for the proposed fiber-optic relaying in the presence of self- interference, which is the interference between backhaul and access links, when the backhaul and access links operate simultaneously at the same carrier frequency. In this paper, we demonstrate the performance of the fiber-optic inband relaying in the presence of both self-interference and inter-cell interference. The theoretical desired-to-undesired- signal ratio is investigated for both uplink and downlink using a specific layout model, as parameters of optical fiber length between relay node facing an eNB and paired relay node facing UE. Using these results, we validate the design method for the proposed fiber-optic inband relaying.