Paper Info
Title
Self-Interference Assessment and Mitigation in 3GPP IAB Deployments
Abstract
The high propagation losses and sensitivity to link blockage naturally require dense deployments of millimeter-wave (mmWave) SG New Radio (NR) systems. One of the inherent challenges in these deployments is cost-efficient backhauling. Addressing this issue, 3GPP has recently proposed the concept of integrated access and backhaul (IAB) to reduce the deployment costs by enabling wireless backhaul. The efficient utilization of spectrum in these systems is conditional on the ability of IAB nodes to simultaneously receive signals on their sectoral antennas. In this paper, we investigate the interference caused by this functionality and identify countermeasures including angular and spatial diversities. Our numerical results demonstrate that the angular distance of 25 degrees between the user equipment (UE) served by adjacent sectoral antennas is sufficient to efficiently mitigate interference. A comparable reduction in the interference level can also be achieved by utilizing spatial diversity with antenna separation of at least 20 m. By combining these methods, one can identify the target levels of angular and spatial diversities suitable for the particular deployment restrictions.
Year
DOI
Venue
2021
10.1109/ICC42927.2021.9500769
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2021)
Keywords
DocType
ISSN
New Radio, IAB, self-interference, spatial diversity, angular diversity
Conference
1550-3607
Citations 
PageRank 
References 
0
0.34
0
Authors
8
Name
Order
Citations
PageRank
Yekaterina Sadovaya101.01
D. Moltchanov212517.60
Hosein Nikopour310.72
Shu-ping Yeh432227.06
Wei Mao501.35
Oner Orhan61597.33
Shilpa Talwar785681.72
Sergey Andreev800.68