University of Oulu

White paper on broadband connectivity in 6G

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Author: Rajatheva, Nandana1; Atzeni, Italo1; Björnson, Emil2;
Organizations: 1University of Oulu, 6G Flagship
2Linköping University
4University of Cassino and Southern Latium
6Kadir Has University
7Universitat Politecnica de Valencia
8Beijing Jiaotong University
9Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications
10ZTE Corporation
11University of Technology Sydney
12Nokia Bell Labs
13Northeastern University
14Luleå University of Technology
15Manchester Metropolitan University
16King Abdullah University of Science and Technology
18Chalmers University of Technology
19University of Macau
20Huawei Technologies
Format: ebook
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 16 MB)
Persistent link:
Language: English
Published: Oulu : University of Oulu, 2020
Publish Date: 2020-06-30

Executive Summary

This white paper explores the road to implementing broadband connectivity in future 6G wireless systems. Different categories of use cases are considered, from extreme capacity with peak data rates up to 1 Tbps, to raising the typical data rates by orders-of-magnitude, to support broadband connectivity at railway speeds up to 1000 km/h. To achieve these goals, not only the terrestrial networks will be evolved but they will also be integrated with satellite networks, all facilitating autonomous systems and various interconnected structures.

We believe that several categories of enablers at the infrastructure, spectrum, and protocol/algorithmic levels are required to realize the intended broadband connectivity goals in 6G. At the infrastructure level, we consider ultra-massive MIMO technology (possibly implemented using holographic radio), intelligent reflecting surfaces, user-centric and scalable cell-free networking, integrated access and backhaul, and integrated space and terrestrial networks. At the spectrum level, the network must seamlessly utilize sub-6 GHz bands for coverage and spatial multiplexing of many devices, while higher bands will be used for pushing the peak rates of point-to-point links. The latter path will lead to THz communications complemented by visible light communications in specific scenarios. At the protocol/algorithmic level, the enablers include improved coding, modulation, and waveforms to achieve lower latencies, higher reliability, and reduced complexity. Different options will be needed to optimally support different use cases. The resource efficiency can be further improved by using various combinations of full-duplex radios, interference management based on rate-splitting, machine-learning-based optimization, coded caching, and broadcasting. Finally, the three levels of enablers must be utilized not only to deliver better broadband services in urban areas, but also to provide full-coverage broadband connectivity must be one of the key outcomes of 6G.

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Series: 6G research visions
ISSN: 2669-9621
ISSN-E: 2669-963X
ISSN-L: 2669-9621
ISBN: 978-952-62-2679-8
Issue: 10
Type of Publication: D4 Published development or research report or study
Field of Science: 213 Electronic, automation and communications engineering, electronics
Copyright information: © University of Oulu, 2020. This publication is copyrighted. You may download, display and print it for your own personal use. Commercial use is prohibited.