# Achieving Ultra-Reliable Communication via CRAN-Enabled Diversity Schemes

## TL;DR

This paper proposes a multi-coordinated transmission scheme leveraging diversity and cooperation in CRAN-enabled networks to achieve ultra-reliable wireless communication, crucial for IoT and critical applications.

## Contribution

It introduces a novel cooperative transmission strategy in CRAN that enhances reliability for machine-type communications, with extensive analysis of interference management and cooperation gains.

## Key findings

- Achieves ultra-reliability of five 9's in wireless communication.
- Demonstrates significant interference reduction through silence and cooperation.
- Shows improved reliability with centralized radio access network strategies.

## Abstract

Internet of things is in progress to build a smart society, and wireless networks are critical enablers for many of its use cases. In this paper, we present a multi-coordinated transmission scheme to achieve ultra-reliability for critical machine-type wireless communication networks. We take advantage of diversity, which is fundamental for dealing with fading channel impairments, and for achieving ultra-reliable region of operation in order of five 9's as defined by 3GPP standardization bodies. We evaluate an interference-limited network composed of multiple remote radio heads that are allowed to cooperate, by keeping silence thus reducing interference, or by performing more elaborated strategies such as maximal ratio transmission, in order to serve a user equipment with ultra-reliability. We provide extensive numerical analysis and discuss the gains of cooperation by the centralized radio access network.