Extra-large massive multiple-input multiple-output (XL-MIMO) systems is a new concept, where spatial non-stationarities allow activate a high number of user equipments (UEs). This paper focuses on a grant-based random access (RA) approach in the novel XL-MIMO channel scenarios. Modifications in the classical Strongest User Collision Resolution (SUCRe) protocol have been aggregated to explore the visibility regions (VRs) overlapping in XL-MIMO. The proposed grant-based RA protocol takes advantage of this new degree of freedom for improving the number of access attempts and accepted UEs. As a result, the proposed grant-based protocol for XL-MIMO systems is capable of reducing latency in the pilot allocation step.
@article{arxiv.2009.02549,
title = {A Grant-based Random Access Protocol in Extra-Large Massive MIMO System},
author = {Otávio Seidi Nishimura and José Carlos Marinello Filho and Taufik Abrão},
journal= {arXiv preprint arXiv:2009.02549},
year = {2020}
}
Comments
12 pages, 5 figures, accepted paper in the IEEE Communications Letters