Signals Ahead: High Power User Equipment (HPUE) Benchmark Study

  • ID: 4438367
  • Report
  • Region: Global
  • 68 Pages
  • Signals Research Group, LLC
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A Benchmark Study of High Power User Equipment (HPUE) in a Commercial Band 41 LTE-TDD Network

SRG conducted a benchmark study of HPUE (High Power User Equipment) with a Power Class 2 Power Amplifier (PA), to determine how it performs against an ordinary smartphone with a Power Class 3 PA. A Power Class 2 PA supports a maximum transmit power of 26 dBm (+/- 2 dB) and a Power Class 3 PA supports a maximum transmit power of 23 dBm (+/- 2 dB). We used Sprint’s network in rural Minnesota and the Chicago vicinity where Samsung is the infrastructure suppler.

Highlights of the Report include the following:

Our Thanks

This study could not have been done without the support of Accuver Americas, who provided us with its XCAL-Solo drive test tool and XCAP post-processing software.

Our Methodology

We used FTP downlink/uplink full buffer data transfers to analyze the performance of two smartphones, the Note 8 (Class 2) and the S7 Edge (Class 3), including data speeds and more important underlying metrics which we used to determine why the two smartphones performed differently, if, in fact, we noticed any measurable differences in the results. We used both time-based and geo-binned data for our analysis.

A Must Read

This report is a "must read" for any organization interested in how operators can impact the performance of their LTE-TDD network, not to mention organizations that want to know how advancements in LTE continue despite the ongoing work on the new 5G/NR standard.

The Potential Results (read the report to learn what we found). In theory, the benefits of HPUE include the following:

  • Higher uplink data speeds, meaning a better user experience, especially at the edge of cell or in other coverage challenged areas of the network;
  • Higher downlink data rates in situations where the uplink coverage limits the transmission of uplink ACKs and NACKs, thereby indirectly limiting the data speeds in the downlink direction;
  • Increased uplink spectral efficiency by using higher MCS values, especially at the edge of the cell or in other RF-challenging environments; and
  • Increased Band 41 coverage/more time spent on Band 41, which improves an operator's network efficiency and potentially user data rates.
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1.0 Executive Summary

2.0 Key Observations

3.0 HPUE Background Downtown Analysis

4.0 Uplink Performance
4.1 Rural Minnesota
4.2 O’Hare Airport to Test Area
4.3 Test Area
4.3 To Shoreline Drive

5.0 Downlink Analysis

6.0 Test Methodology

7.0 Final Thoughts

8.0 Appendix

List of Figures & Tables
Figure 1. Uplink RB Allocations - 2x10 MHz FDD
Figure 2. Uplink RB Allocations - 1x20 MHz TDD
Figure 3. Minnesota Drive Route
Figure 4. Band 41 Median Throughput - by power class
Figure 5. Band 41 Physical and MAC Layer Throughput CDF Plots - by power class
Figure 6. Band 41 Uplink MCS CDF Plots - by power class
Figure 7. Band 41 Uplink RB CDF Plots - by power class
Figure 8. Band 41 Median PUSCH and PUCCH Transmit Power - by power class
Figure 9. Band 41 PUSCH Transmit Power CDF Plots - by power class
Figure 10. Band 41 RSRP CDF Plots - by power class
Figure 11. Band 41 Uplink MCS Versus RSRP - by power class
Figure 12. Band 41 Uplink MCS Grouped by RSRP with Performance Differences - by power class
Figure 13. Overall Spectral Efficiency Gains
Figure 14. Spectral Efficiency Gains with RSRP Below -105 dBm - same and different EARFCNs
Figure 15. Band 41 Uplink 41 PUSCH Transmit Power Versus RSRP - by power class
Figure 16. Band 41 Uplink PUSCH Transmit Power Grouped by RSRP with Performance Differences - by power class
Figure 17. Band 41 Uplink RB Allocations Versus RSRP - by power class
Figure 18. Band 41 Uplink RB Allocations Grouped by RSRP with Performance Differences - by power class
Figure 19. Band 41 Uplink RB Allocations Versus RSRP - by power class and EARFCN
Figure 20. Band 41 Uplink RB Allocations Grouped by RSRP with Performance Differences - by power class and by EARFCN
Figure 21. Band 41 Uplink Physical Layer Throughput Versus RSRP - by power class
Figure 22. Band 41 Uplink Physical Layer Throughput Grouped by RSRP with Performance Differences - by power class
Figure 23. Band 41 Uplink Physical Layer Throughput Versus RSRP - by power class and EARFCN
Figure 24. Band 25 Median Uplink Physical and MAC Layer Throughput - by smartphone
Figure 25. Band 25 Uplink Physical Layer Throughput Versus RSRP - by smartphone
Figure 26. Band 25 Uplink Physical Layer Throughput Grouped by RSRP with Performance Differences - by smartphone
Figure 27. Band 25 Median Uplink Physical Layer Throughput Versus RSRP - by smartphone
Figure 28. Time on Band 41
Figure 29. Band 41 Utilization - Note 8
Figure 30. Band 41 Utilization - S7 Edge
Figure 31. Band Allocations - by power class
Figure 32. Band Allocations for Test #4 (Binned) - by power class
Figure 33. Physical Layer Throughput Comparisons for Test #4 (Binned) - by power class
Figure 34. Physical Layer Throughput Comparisons for Test #4 (Binned) - by frequency band and power class
Figure 35. Median Downlink and Uplink Physical Layer Throughput around SRG HQ - by power class
Figure 36. Drive Route
Figure 37. Band 41 Median Throughput - by power class
Figure 38. Band 41 Physical and MAC Layer Throughput CDF Plots - by power class
Figure 39. Band 41 Uplink RB CDF Plots - by power class
Figure 40. Band 41 Median PUSCH and PUCCH Transmit Power - by power class
Figure 41. Band 41 PUSCH Transmit Power CDF Plots - by power class
Figure 42. Band 41 Uplink MCS Versus RSRP - by power class
Figure 43. Band 41 Uplink MCS Grouped by RSRP with Performance Differences - by power class
Figure 44. Band 41 Uplink 41 PUSCH Transmit Power Versus RSRP - by power class
Figure 45. Band 41 Uplink PUSCH Transmit Power Grouped by RSRP with Performance Differences - by power class
Figure 46. Band 41 Uplink RB Allocations Versus RSRP - by power class
Figure 47. Band 41 Uplink RB Allocations Grouped by RSRP with Performance Differences - by power class
Figure 48. Band 41 Uplink Physical Layer Throughput Versus RSRP - by power class
Figure 49. Band 41 Uplink Physical Layer Throughput Grouped by RSRP with Performance Differences - by power class
Figure 50. Band 41 PUSCH Transmit Power Versus RSRP, Grouped by RB Allocations Scatter Plot - S7 Edge
Figure 51. Band 41 PUSCH Transmit Power Versus RSRP, Grouped by RB Allocations Scatter Plot - Note 8
Figure 52. Band 41 RSRP CDF Plots
Figure 53. Energy Efficiency Grouped by RSRP - by power class
Figure 54. Weighted Average Energy Efficiency - by power class with and without backlight
Figure 55. Chicago Test Area
Figure 56. Band 41 Median Transmit Power Levels - by power class
Figure 57. Band 41 Uplink PUSCH Transmit Power CDF Plots - by power class
Figure 58. Band 41 Uplink 41 PUSCH Transmit Power Versus RSRP - by power class
Figure 59. Band 41 Uplink PUSCH Transmit Power Grouped by RSRP with Performance
Figure 60. Band 41 Uplink RB CDF Plots - by power class
Figure 61. Band 41 Uplink Physical Layer Throughput Versus RSRP - by power class
Figure 62. Band 41 Uplink Physical Layer Throughput Grouped by RSRP with Performance Differences - by power class
Figure 63. Band 41 RSRP CDF Plots
Figure 64. Energy Efficiency Grouped by RSRP - by power class
Figure 65. Weighted Average Energy Efficiency - by power class with and without backlight
Figure 66. Energy Efficiency Grouped by RSRP with Different EARFCN Values - by power class
Figure 67. Weighted Average Energy Efficiency with Different EARFCN Values - by power class with and without backlight
Figure 68. Band 41 Uplink MCS Grouped by RSRP for Shared Radio Channel - by power class
Figure 69. Band 41 Uplink MCS Grouped by RSRP for Non-Shared Radio Channel - by power class
Figure 70. Overall Spectral Efficiency
Figure 71. Spectral Efficiency for RSRP <= -100 dBm
Figure 72. Band 41 Uplink 41 PUSCH Transmit Power Versus RSRP - by power class
Figure 73. Band 41 Uplink PUSCH Transmit Power Grouped by RSRP with Performance Differences - by power class
Figure 74. Band 41 Uplink MCS Versus RSRP - by power class
Figure 75. Band 41 Uplink MCS Grouped by RSRP - by power class
Figure 76. Overall Spectral Efficiency
Figure 77. Spectral Efficiency for RSRP <= -100 dBm
Figure 78. Band 41 Uplink RB Allocations Versus RSRP - by power class
Figure 79. Band 41 Uplink RB Allocations Grouped by RSRP with Performance Differences - by power class
Figure 80. Band 41 Uplink Physical Layer Throughput Versus RSRP - by power class
Figure 81. Band 41 Uplink Physical Layer Throughput Grouped by RSRP with Performance Differences -by power class
Figure 82. Band 41 Median Throughput - by power class
Figure 83. Median Throughput Detailed Analysis - by power class
Figure 84. Band 41 Downlink Physical Layer Throughput Versus RSRP - by power class
Figure 85. Band 41 Downlink Physical Layer Throughput Grouped by RSRP with Performance Differences - by power class
Figure 86. Band 25 Downlink Physical Layer Throughput Versus RSRP - by power class
Figure 87. Band 25 Downlink Physical Layer Throughput Grouped by RSRP with Performance Differences - by power class
Figure 88. Estimated Maximum Downlink Data Rates Grouped by RSRP - by power class
Figure 89. XCAL-Solo
Figure 90. Band 41 PUSCH Transmit Power Versus RSRP, Grouped by MCS Allocations Scatter Plot - S7 Edge
Figure 91. Band 41 PUSCH Transmit Power Versus RSRP, Grouped by MCS Allocations Scatter Plot - Note 8
Figure 92. Band 41 Uplink MCS Versus RSRP with shared EARFCN - by power class
Figure 93. Band 41 Uplink MCS Versus RSRP with different EARFCN - by power class

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