Dynamic In-Band Self-Backhauling with Interference Cancellation

Millimeter wave frequency bands are expected to be used in future 5G networks to provide high data rates. However, higher frequency bands are characterized with high path loss attenuation and sensitivity to the blockages. Thus, deployment of dense networks using smaller cell sizes is important for coverage. To this end, in-band wireless relaying can be used to realize smaller cell sizes at reduced backhaul cost. Wireless relaying may however sacrifice capacity because of half-duplex constraint. In this paper, we investigate the performance of the millimeter wave (mmWave) network employing self-backhaul relay nodes and centralized transmission coordination. In particular, we look at the usage of interference cancellation (IC) receivers to enable backhaul uplink multiple access channel (BU-MAC) and full-duplex (FD) access/backhaul transmission which can boost capacity of relaying. Through simulation results we show, that the 5th% E2E throughput is improved by around 90% with BU-MAC scheme and over 120% in FD scheme. The average throughput of relay downlink increases by around 50% and 80% with BU-MAC and FD schemes resnectively.