6G Wireless Systems: Vision, Requirements, Challenges, Insights, and Opportunities
Tataria, Harsh LU ; Shafi, Mansoor ; Molisch, Andreas LU ; Dohler, Mischa ; Sjöland, Henrik LU
and Tufvesson, Fredrik
LU
(2021)
In Proceedings of the IEEE
109(7).
p.1166-1199
- Abstract
- Mobile communications have been undergoing a generational change every ten years or so. However, the time difference between the so-called "G's" is also decreasing. While fifth-generation (5G) systems are becoming a commercial reality, there is already significant interest in systems beyond 5G, which we refer to as the sixth-generation (6G) of wireless systems. In contrast to the already published papers on the topic, we take a top-down approach to 6G. More precisely, we present a holistic discussion of 6G systems beginning with lifestyle and societal changes driving the need for next generation networks. This is followed by a discussion into the technical requirements needed to enable 6G applications, based on which we dissect key... (More)
- Mobile communications have been undergoing a generational change every ten years or so. However, the time difference between the so-called "G's" is also decreasing. While fifth-generation (5G) systems are becoming a commercial reality, there is already significant interest in systems beyond 5G, which we refer to as the sixth-generation (6G) of wireless systems. In contrast to the already published papers on the topic, we take a top-down approach to 6G. More precisely, we present a holistic discussion of 6G systems beginning with lifestyle and societal changes driving the need for next generation networks. This is followed by a discussion into the technical requirements needed to enable 6G applications, based on which we dissect key challenges, as well as possibilities for practically realizable system solutions across all layers of the Open Systems Interconnection stack (i.e., from applications to the physical layer). Since many of the 6G applications will need access to an order-of-magnitude more spectrum, utilization of frequencies between 100 GHz and 1 THz becomes of paramount importance. As such, the 6G eco-system will feature a diverse range of frequency bands, ranging from below 6 GHz up to 1 THz. We comprehensively characterize the limitations that must be overcome to realize working systems in these bands; and provide a unique perspective on the physical, as well as higher layer challenges relating to the design of next generation core networks, new modulation and coding methods, novel multiple access techniques, antenna arrays, wave propagation, radio-frequency transceiver design, as well as real-time signal processing. We rigorously discuss the fundamental changes required in the core networks of the future, such as the redesign or significant reduction of the transport architecture that serves as a major source of latency for time-sensitive applications. This is in sharp contrast to the present hierarchical network architectures, which are not suitable to realize many of the anticipated 6G services. While evaluating the strengths and weaknesses of key candidate 6G technologies, we differentiate what may be practically achievable over the next decade, relative to what is possible in theory. Keeping this in mind, we present concrete research challenges for each of the discussed system aspects, providing inspiration for what follows. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/6b69f8ce-faf4-43dc-bd3d-bc225f8320a2
- author
- Tataria, Harsh
LU
; Shafi, Mansoor
; Molisch, Andreas
LU
; Dohler, Mischa
; Sjöland, Henrik
LU
and Tufvesson, Fredrik
LU
- organization
- publishing date
- 2021-07-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- 6G, beamforming, next generation core network, PHY, signal processing, RF transceivers, THz, ultra massive MIMO, waveforms
- in
- Proceedings of the IEEE
- volume
- 109
- issue
- 7
- pages
- 34 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:85103787471
- ISSN
- 0018-9219
- DOI
- 10.1109/JPROC.2021.3061701
- project
- Massive Mimo Technology and Applications
- Breaking the Barriers of Sub-Terahertz Communications: A Low-Complexity Signal Processing Perspective
- language
- English
- LU publication?
- yes
- additional info
- Invited Article Published in the Proceedings of the IEEE
- id
- 6b69f8ce-faf4-43dc-bd3d-bc225f8320a2
- alternative location
- https://arxiv.org/abs/2008.03213
- date added to LUP
- 2020-08-15 14:59:04
- date last changed
- 2024-04-03 11:42:45
@article{6b69f8ce-faf4-43dc-bd3d-bc225f8320a2,
abstract = {{Mobile communications have been undergoing a generational change every ten years or so. However, the time difference between the so-called "G's" is also decreasing. While fifth-generation (5G) systems are becoming a commercial reality, there is already significant interest in systems beyond 5G, which we refer to as the sixth-generation (6G) of wireless systems. In contrast to the already published papers on the topic, we take a top-down approach to 6G. More precisely, we present a holistic discussion of 6G systems beginning with lifestyle and societal changes driving the need for next generation networks. This is followed by a discussion into the technical requirements needed to enable 6G applications, based on which we dissect key challenges, as well as possibilities for practically realizable system solutions across all layers of the Open Systems Interconnection stack (i.e., from applications to the physical layer). Since many of the 6G applications will need access to an order-of-magnitude more spectrum, utilization of frequencies between 100 GHz and 1 THz becomes of paramount importance. As such, the 6G eco-system will feature a diverse range of frequency bands, ranging from below 6 GHz up to 1 THz. We comprehensively characterize the limitations that must be overcome to realize working systems in these bands; and provide a unique perspective on the physical, as well as higher layer challenges relating to the design of next generation core networks, new modulation and coding methods, novel multiple access techniques, antenna arrays, wave propagation, radio-frequency transceiver design, as well as real-time signal processing. We rigorously discuss the fundamental changes required in the core networks of the future, such as the redesign or significant reduction of the transport architecture that serves as a major source of latency for time-sensitive applications. This is in sharp contrast to the present hierarchical network architectures, which are not suitable to realize many of the anticipated 6G services. While evaluating the strengths and weaknesses of key candidate 6G technologies, we differentiate what may be practically achievable over the next decade, relative to what is possible in theory. Keeping this in mind, we present concrete research challenges for each of the discussed system aspects, providing inspiration for what follows.}},
author = {{Tataria, Harsh and Shafi, Mansoor and Molisch, Andreas and Dohler, Mischa and Sjöland, Henrik and Tufvesson, Fredrik}},
issn = {{0018-9219}},
keywords = {{6G; beamforming; next generation core network; PHY; signal processing; RF transceivers; THz; ultra massive MIMO; waveforms}},
language = {{eng}},
month = {{07}},
number = {{7}},
pages = {{1166--1199}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{Proceedings of the IEEE}},
title = {{6G Wireless Systems: Vision, Requirements, Challenges, Insights, and Opportunities}},
url = {{http://dx.doi.org/10.1109/JPROC.2021.3061701}},
doi = {{10.1109/JPROC.2021.3061701}},
volume = {{109}},
year = {{2021}},
}