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5G: The Greatest Show on Earth - Volume 4, K-Pop Meets 5G (Benchmark Study of the SK Telecom [SKT] 5G NR Network in Seoul, South Korea)

Published by Signals Research Group Product code 884619
Published Content info 56 Pages
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5G: The Greatest Show on Earth - Volume 4, K-Pop Meets 5G (Benchmark Study of the SK Telecom [SKT] 5G NR Network in Seoul, South Korea)
Published: July 3, 2019 Content info: 56 Pages
Description

SRG conducted a benchmark study of the SK Telecom (SKT) 5G NR network in Seoul, South Korea. This report is critical to any organization wanting to understand the current capabilities of 5G NR operating in FR1 (sub 7.125 GHz) as well as its longer term prospects.

Highlights of the Report include the following:

  • Our Thanks. We did this study in collaboration with Accuver Americas / Innowireless and Spirent Communications who provided us with their respective test equipment, which we identify in the report. SRGdid all the testing and analysis of the data and we are solely responsible for the commentary in the report.
  • Our Methodology. We captured chipset diagnostic messages from two smartphones - the LG V50 (5G NR) smartphone and the LG LM-G820N (LTE) smartphone - both phones used Qualcomm modem(s). In total, we transferred more than 2.3 TB of data, using a combination of drive tests and pedestrian tests, downlink and uplink data transfers, and TCP/UDP protocols.
  • Several Firsts. This study marked the first time that we observed concurrent data transfers over 5G NR (100 MHz TDD) and LTE (75 MHz LTE with 5CCA), uplink data transfers over 5G NR, mobility management, and FR1.
  • The Results. We analyzed a host of metrics to evaluate network performance, spectral efficiency, and the impact on the user experience. Thanks to the combined use of LTE and 5G NR radio bearers, the V50 easily outperformed its LTE brethren (high double digits to low/mid triple digits on a percentage basis in all downlink tests. We also separated the analysis by radio bearer and took into consideration RB allocations to adjust for network loading and to calculate implied spectral efficiency. The results from uplink tests tended to favor LTE, even without the use of uplink carrier aggregation with LTE.
  • Opportunities Abound. Network optimization, an increase in the concurrent use of 5G NR and LTE, the introduction of digital beam forming with multiple beam indices, and a reduction in RLF, due in part to thermal issues with the smartphone, will meaningfully improve results. We observed the need for existing R15 features not present in the initial 5G NR smartphones and forthcoming functionality in Release 16 which will also improve the strong initial performance that we observed.
Table of Contents

Table of Contents

1.0. Executive Summary

2.0. Key Observations

3.0. 5G Only Downlink Drive Test

4.0. Downlink Tests - 5G and LTE Phones Simultaneous

  • 4.1. Downlink Drive Test
  • 4.2. Downlink Pedestrian Test - COEX Area
  • 4.3. Downlink Pedestrian Test - Gangnam Station Area

5.0. Uplink Tests

  • 5.1. Drive Test
  • 5.2. Pedestrian Test

6.0. YouTube

7.0. Test Methodology

8.0. Final Thoughts

Index of Figures & Tables

  • Figure 1. Sample Results
  • Figure 2. Drive Route
  • Figure 3. 5G NR Active
  • Figure 4. Radio Link Failure Causes
  • Figure 5. Median 5G, LTE and Total Throughput (> 1 Mbps) - measured and RB normalized
  • Figure 6. 5G, LTE and Total Throughput Distribution (>1 Mbps) - measured and RB normalized
  • Figure 7. Median 5G, LTE and Total Throughput (5G > 1 Mbps) - measured and RB normalized
  • Figure 8. 5G, LTE and Total Throughput Distribution (5G > 1 Mbps) - measured and RB normalized
  • Figure 9. 5G NR Throughput versus BRSRP
  • Figure 10. 5G NR Throughput versus BSNR
  • Figure 11. Drive Route
  • Figure 12. 5G NR Active
  • Figure 13. RLF Causes
  • Figure 14. Median 5G and LTE Throughput (All Data) - measured and RB normalized
  • Figure 15. Median 5G and LTE Throughput with Details (All Data) - measured and RB normalized
  • Figure 16. Median 5G and LTE Throughput with Details (> 0 Mbps) - measured and RB normalized
  • Figure 17. 5G, LTE and Total Throughput Distribution (both Phones) - measured and RB normalized
  • Figure 18. 5G, LTE and Total Throughput Distribution (5G Phone Only) - measured and RB normalized
  • Figure 19. LTE RB Distribution (both Phones)
  • Figure 20. Median BRSRP/RSRP by Frequency Band (both Phones)
  • Figure 21. BRSRP/RSRP Distribution by Frequency Band (both Phones)
  • Figure 22. Median BSNR/SINR by Frequency Band (both Phones)
  • Figure 23. BSNR/SINR Distribution by Frequency Band (both Phones)
  • Figure 24. LTE Carrier Aggregation Utilization Rate (both Phones)
  • Figure 25. 5G NR and LTE Scheduling by TTI
  • Figure 26. 5G and LTE MIMO Rank Utilization Rates by Frequency Band
  • Figure 27. 5G and LTE Modulation Scheme Utilization Rates by Frequency Band
  • Figure 28. Pedestrian Route - COEX
  • Figure 29. 5G NR Active - COEX
  • Figure 30. RLF Causes
  • Figure 31. LG V50 5G NR and LTE Throughput with RLF
  • Figure 32. Median 5G, LTE and Total Throughput - measured and RB normalized
  • Figure 33. 5G, LTE and Total Throughput Distribution - measured and RB normalized
  • Figure 34. LG V50 Median 5G, LTE and Total Throughput with Various Filtering- measured and RB normalized
  • Figure 35. 5G, LTE Throughput and RB Allocations Time Series Plot
  • Figure 36. BRSRP versus BSNR Scatterplot
  • Figure 37. 5G NR PDSCH Throughput versus BRSRP
  • Figure 38. 5G NR PDSCH Throughput versus BSNR
  • Figure 39. CQI Cumulative Distribution
  • Figure 40. 5G NR PDSCH Throughput Versus CQI
  • Figure 41. Pedestrian Route - Gangnam
  • Figure 42. 5G, LTE and Total Throughput Distribution and Median Values - measured and RB normalized
  • Figure 43. 5G NR PDSCH Throughput versus BRSRP
  • Figure 44. 5G NR PDSCH Throughput versus BSNR
  • Figure 45. 5G NR PDSCH Throughput versus MIMO Rank and 256QAM Modulation
  • Figure 46. Drive Route
  • Figure 47. 5G NR and LTE Throughput Distribution and Average Values (both Phones)
  • Figure 48. PUSCH Transmit Power Distribution (both Phones)
  • Figure 49. Uplink Throughput Versus PUSCH Transmit Power (both Phones)
  • Figure 50. PUSCH Throughput Versus PUSCH Transmit Power
  • Figure 51. 5G NR Versus LTE PUSCH Throughput and RB Allocation Time Series Plot
  • Figure 52. 5G NR PCI Values
  • Figure 53. LTE PCI Values
  • Figure 54. 5G NR and LTE Throughput Distribution and Average Values (both Phones)
  • Figure 55. Uplink Modulation Scheme Distribution (both Phones)
  • Figure 56. PUSCH Transmit Power Distribution (both Phones)
  • Figure 57. 5G NR and LTE PDSCH Throughput with YouTube Time Series Plot
  • Figure 58. 5G NR and LTE YouTube KPIs
  • Figure 59. 5G NR and LTE Video Buffer Times
  • Figure 60. Cumulative Buffer and RRC State - LTE Phone
  • Figure 61. Cumulative Buffer and PUSCH Transmit Power - LTE Phone
  • Figure 62. Cumulative Buffer and RRC State - 5G NR Phone
  • Figure 63. Cumulative Buffer and PUSCH Transmit Power - 5G NR Phone
  • Figure 64. RRC Connection Times
  • Figure 65. Umetrix Data Architecture
  • Figure 66. Umetrix GUI Displayed on Phone
  • Figure 67. XCAL-Solo GUI Displayed on Phone
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