2022/05/18 by Yekaterina Sadovaya, Sadovaya, Yekaterina, Dmitri Moltchanov +13
Engineering · #Advanced MIMO Systems Optimization #FOS: Computer and information sciences #Microwave Engineering and Waveguides #Millimeter-Wave Propagation and Modeling #Networking and Internet Architecture (cs.NI)
paper · pdf · doi:10.48550/arxiv.2205.09202
openalex publication_date 2022/05/18 · openalex created_date 2022/05/23 · openalex updated_date 2026/07/28
The recently proposed NR-ready integrated access and backhaul (IAB) architecture promises to bring a cost-efficient deployment solution for both coverage extension and capacity boosting in future 5G/5G+ systems. While its impact on the coverage extension was thoughtfully addressed in the literature, the effect of advanced functionalities such as multi-hop, multi-connectivity, and multi-beam operations on the throughput remains unclear. We review and characterize the system-level impact of these capabilities on the performance of self-backhauled IAB systems operating in half-duplex mode and utilizing millimeter-wave (mmWave) technology across both access and backhaul. Our results indicate that the throughput gain of multi-hopping and multi-beaming is significant even without multi-connectivity operation. Another important learning is that in all-mmWave systems with link blockage, multi-connectivity with link switching allows achieving self-load balancing. Finally, we outline future research directions.