# A Grant-based Random Access Protocol in Extra-Large Massive MIMO System

arXiv: https://arxiv.org/abs/2009.02549 · HTML: https://mlsanity.com/paper/2009.02549/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 5 Sep 2020.

## Built on by (most cited first, 1 of 1)

- [Multi-Power Level Q-Learning Algorithm for Random Access in NOMA mMTC Systems](https://mlsanity.com/paper/2301.05196/) (2023)

## Abstract (arXiv)

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.