URLLC key enablers for and beyond systems

Assist. Prof. Hirley Alves Machine-type Communications Group Abstract

URLLC is an inherent part of 5G and is the communication mode that imposes the greatest technical challenges for 5G and beyond systems.

6GFLAGSHIP.COM, #6GFLAGSHIP Vision for 2030 Our society is data-driven, enabled by near-instant, unlimited wireless connectivity.

6G will emerge around 2030 to satisfy the expectations not met with 5G, as well as, the new ones fusing AI inspired applications in every field of society with ubiquitous wireless connectivity.

6GFLAGSHIP.COM, #6GFLAGSHIP Vision for 2030 Our society is data-driven, enabled by near-instant, unlimited wireless connectivity.

6G will emerge around 2030 to satisfy the expectations not met with 5G, as well as, the new ones fusing AI inspired applications in every field of society with ubiquitous wireless connectivity.

6GFLAGSHIP.COM, #6GFLAGSHIP Abstract

Even though some advancements have been made with 5G NR, we are still far from enabling that vision.

What are the URLLC enablers for 5G and beyond systems and their associated challenges?

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mMTC LLC (URC-S) URC (URC-L)

mMIMO

Fast uplink grant

Semi persistent NOMA scheduling

Coded random Grant free RA access High coverage 106 devices/km2 NB-IoT Latency < 1ms Low-cost devices Very High coverage Long lasting battery life LTE-M Reliability > 99.999 %

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mMTC LLC (URC-S) URC (URC-L)

mMIMO Short TTI HARQ Fast uplink grant Network MEC slicing Packet duplication Semi persistent NOMA scheduling Finite Fog blocklength Diversity Techniques Coded random Grant free RA coding access Network NOMA High coverage C-RAN 106 devices/km2 NB-IoT coding Latency < 1ms Low-cost devices Multi-connectivity Very High coverage Long lasting battery life LTE-M Machine learning Reliability > 99.999 %

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mMTC LLC (URC-S) URC (URC-L)

mMIMO Short TTI HARQ Fast uplink grant Network MEC slicing Packet duplication Semi persistent NOMA scheduling Finite Fog blocklength Diversity Techniques Coded random Grant free RA coding access Network NOMA High coverage C-RAN 106 devices/km2 NB-IoT coding Latency < 1ms Low-cost devices Multi-connectivity Very High coverage Long lasting battery life LTE-M Machine learning Reliability > 99.999 %

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Diversity Techniques Cooperative Diversity (HARQ)

Finite Blocklength Coding

- 32 bytes payload - 99.999% reliability

P. Nouri, H. Alves, M. Latva-aho,``Performance Analysis of Ultra-Reliable Short Message Decode and Forward Relaying Protocols'', EURASIP Journal on Wireless Communications and Networking, pp. 1-10, vol 2018, no 194, Aug 2018. 6GFLAGSHIP.COM, #6GFLAGSHIP Enablers

Diversity Techniques MIMO & FBC

O. Lopez, H. Alves and M. Latva-aho \Rate Control under Finite Blocklength for Downlink Cellular Networks with Reliability Constraints", IEEE ISWCS'2018, Aug. 2018, Lisbon, PT. arXiv: https://arxiv.org/abs/1806.04386 6GFLAGSHIP.COM, #6GFLAGSHIP Enablers

Diversity Techniques MIMO & FBC Robust QoS guarantees Rate and Power Control

O. L. A. López, H. Alves, and Matti Latva-aho, “Joint Power Control and Rate Allocation enabling Ultra-Reliability and Energy Efficiency in SIMO Wireless Networks,”, TCOM (cond. Accepted.). 6GFLAGSHIP.COM, #6GFLAGSHIP Challenges ahead

- Diversity (cooperative, spatial,…) - Multi-connectivity - Meet 32 bytes & 99.999% reliability

- Deterministic QoS - High reliability under strict latency - High Coverage & availability

6GFlagship.com,6GFLAGSHIP.COM, @6GFlagship #6GFLAGSHIP MTC Group Kiitos! Thanks! Obrigado!

https://sites.google.com/view/hirley-alves/group

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