Power control optimization for uplink grant-free URLLC

Renato Barbosa Abreu, Thomas Jacobsen, Gilberto Berardinelli, Klaus I. Pedersen, Istvan Kovacs, Preben Elgaard Mogensen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

25 Citations (Scopus)
906 Downloads (Pure)

Abstract

Ultra-reliable and low latency communication (URLLC) presents the most challenging use cases for fifth generation (5G) mobile networks. Traditionally the focus for mobile broadband has been to optimize the system throughput for high speed data traffic. However the optimization criteria for URLLC should focus on achieving small packets transmissions under strict targets such as 99.999% reliability within 1 ms. Power control is one candidate technology component for improving reliability and latency. In this work we investigate the power control for grant-free URLLC transmissions through extensive system level simulations in a urban outdoor scenario. We initially compare different settings for open loop power control (OLPC) with full and with fractional path loss compensation. Then we evaluate whether power boosting the retransmission can reduce the probability of packets delays under the 1 ms constraint. We also discuss the practical implication of applying power boosting. With full path loss compensation and boosting retransmissions, we show that a URLLC load such as 1200 small packets per second per cell can be achieved in the considered scenario.

Original languageEnglish
Title of host publication2018 IEEE Wireless Communications and Networking Conference (WCNC)
Number of pages6
PublisherIEEE
Publication date8 Jun 2018
Pages1-6
ISBN (Print)978-1-5386-1735-9
ISBN (Electronic)978-1-5386-4068-5
DOIs
Publication statusPublished - 8 Jun 2018
EventIEEE Wireless Communications and Networking Conference -
Duration: 15 Apr 201818 Apr 2018

Conference

ConferenceIEEE Wireless Communications and Networking Conference
Period15/04/201818/04/2018
SeriesI E E E Wireless Communications and Networking Conference. Proceedings
ISSN1525-3511

Keywords

  • URLLC
  • power control
  • HARQ
  • system level simulation
  • 5G

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