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5G:地球上で最大のショー-第12巻:簡単な計算式(AT&Tの n5バンドおよび n260バンドネットワークに焦点を当てた5Gベンチマーク調査)

5G: The Greatest Show on Earth - Volume 12, Simple Math (5G Benchmark Study, with Focus on the AT&T Band n5 and Band n260 Networks)

出版日: | 発行: Signals Research Group | ページ情報: 英文 37 Pages | 納期: 即日から翌営業日

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5G:地球上で最大のショー-第12巻:簡単な計算式(AT&Tの n5バンドおよび n260バンドネットワークに焦点を当てた5Gベンチマーク調査)
出版日: 2020年08月31日
発行: Signals Research Group
ページ情報: 英文 37 Pages
納期: 即日から翌営業日
  • 全表示
  • 概要
  • 目次
概要

当レポートでは、ダウンリンクとアップリンクのPDCPスプリットベアラの組み合わせをサポートするAT&Tの n5バンドおよび n260バンドネットワークに焦点を当てた5Gベンチマーク調査結果を分析しています。

目次

第1章 エグゼクティブサマリー

第2章 主な所見

第3章 5G NRアップリンクのパフォーマンス

第4章 PDCPの組み合わせ、熱の問題、およびダラスの暑さ

  • 850 MHz
  • 39 GHz

第5章 テスト手法

第6章 結論

目次

SRG just completed its twelfth 5G benchmark study, this time with a focus on the AT&T Band n5 and Band n260 networks which support downlink and uplink PDCP split bearer combining. AT&T has 2x5 MHz of Band n5 in Indianapolis and 2x10 MHz in Dallas, thanks to DSS. Additionally, AT&T has 400 MHz of 39 GHz spectrum in Dallas.

Highlights of the Report include the following:

  • Our Thanks. We did this study in collaboration with Accuver Americas and Spirent Communications who provided us with their respective test equipment and platforms, which we identify in the report. SRG did all the testing and analysis of the data and we are solely responsible for the commentary in the report.
  • Simple Math. PDCP split bearer functionality can have a much greater impact on total end user data speeds in the uplink than in the downlink direction. The primary reason is that in the downlink 3CCA to 5CCA LTE accounts for the majority of the total throughput. In the uplink, total data speeds can double, especially if uplink LTE carrier aggregation isn't present.
  • The Tradeoff. As is the case with downlink PDCP combining, leveraging a low-band 5G NR carrier means the smartphone can't use a low-band LTE carrier. This tradeoff can negate the benefits of uplink combining and even result in a net negative gain in speeds when uplink carrier aggregation is available and the low-band LTE channel has greater bandwidth than 5G NR.
  • Split Bearer in Band n260 improves performance, but the results could be better. Results were protocol specific but in all cases greater use of 5G NR and LTE radio assets should be possible.
  • Darn that Thermal RLF. Thermal RLFs (Radio Link Failures) reared their ugly head in our tests. This outcome is understandable in Dallas in mid-August but hard to rationalize when the phone is in an air conditioned car in Indianapolis on a rainy day and only transmitting modest uplink data speeds. We put things into context by looking at how much data a phone can receive/send for a given increase in temperature.

Table of Contents

1.0. Executive Summary

2.0. Key Observations

3.0. 5G NR Uplink Performance

4.0. PDCP Combining, Thermal Issues, and the Dallas Heat

  • 4.1. 850 MHz
  • 4.2. 39 GHz

5.0. Test Methodology

6.0. Final Thoughts

Index of Figures & Tables

  • Figure 1. AT&T Band n5 5G NR Comes Home - Initial Coverage
  • Figure 2. 5G NR Contribution to Total Throughput with Varying LTE Channel Bandwidths
  • Figure 3. Test 10 Drive Route
  • Figure 4. 5G NR and LTE Uplink Throughput - Test 10
  • Figure 5. 5G NR and LTE Spectral E£ ciency - Test 10
  • Figure 6. 5G NR and LTE Throughput Time Series - Test 10
  • Figure 7. Test 11 Drive Route
  • Figure 8. 5G NR and LTE Throughput with LTE Channel Bandwidths - Test 11
  • Figure 9. 5G NR Throughput and RSRP - Test 11
  • Figure 10. 5G NR Throughput and RSRP - Test 11
  • Figure 11. Galaxy Note 10+ and Galaxy S20+ Average Throughput - Test 12
  • Figure 12. Galaxy Note 10+ and Galaxy S20+ Throughput Time Series - Test 12
  • Figure 13. Galaxy Note 10+ 5G NR and LTE Throughput - Hotel Room
  • Figure 14. Galaxy Note 10+ LTE Downlink Pathloss - Hotel Room
  • Figure 15. Galaxy Note 10+ LTE Downlink Pathloss - Test 2
  • Figure 16. Galaxy Note 10+ 5G NR and LTE Throughput - Skype
  • Figure 17. Galaxy S20+ LTE Throughput - Skype
  • Figure 18. Galaxy Note 10+ and Galaxy S20+ Average Throughput - Skype
  • Figure 19. Galaxy Note 10+ 5G NR and LTE Throughput - UDP 5 Mbps
  • Figure 20. Galaxy Note 10+ 5G NR and LTE Throughput - UDP 30 Mbps
  • Figure 21. Data Transfer Payload to Thermal
  • Figure 22. UDP Uplink Data Transfer with Band n5
  • Figure 23. HTTP Uplink Data Transfer with Band n5
  • Figure 24. UDP Downlink Data Transfer with Band n260
  • Figure 25. HTTP Downlink Data Transfer with Band n260
  • Figure 26. HTTP Downlink Data Transfer - CPU, GPU, and Battery Temperature Analysis
  • Figure 27. HTTP Downlink Data Transfer with Band n260 - throughput by component carrier
  • Figure 28. HTTP Downlink Data Transfer with Band n260 - RB allocations by component carrier
  • Figure 29. HTTP Downlink Data Transfer with Band n260 - RB allocations by component carrier
  • Figure 30. HTTP Downlink Data Transfer with Band n260 - MCS allocations by component carrier
  • Figure 31. HTTP Downlink Data Transfer with Band n260 - MCS allocations by component carrier
  • Figure 32. HTTP Uplink Data Transfer with Band n260
  • Figure 33. UDP Uplink Data Transfer with Band n260
  • Figure 34. XCAL-Solo in Action
  • Figure 35. XCAL-Solo Hardware
  • Figure 36. Umetrix Data Architecture
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