• +353-1-416-8900(GMT OFFICE HOURS)
  • 1-800-526-8630(US/CAN TOLL FREE)
  • 1-917-300-0470(EST OFFICE HOURS)
Signals Ahead: Fifty Shades of MIMO - Product Image

Signals Ahead: Fifty Shades of MIMO

  • Published: August 2013
  • 76 Pages
  • Signals Research Group, LLC

Quantifying the Impact of MIMO in Commercial LTE Networks

This report analyzes the incremental benefits of MIMO (Multiple Input, Multiple Output), specifically Transmission Mode 3 (TM 3), in commercial LTE networks. The results are based on testing in LTE networks from two different operators (Knoxville, TN and Santa Clara, CA) with TM 3 enabled and with the network specially configured to only support Transmission Mode 2. In addition to adhering to a fairly rigorous test methodology, the analysis of the data included mapping the results to a common set of KPIs – primarily device-reported SINR and RSRP, to ensure an apples-to-apples comparison.

This report is included as part of a corporate subscription to Signals Ahead or it can be purchased separately.

KEY OBSERVATIONS INCLUDE THE FOLLOWING

- Both LTE networks delivered outstanding end user throughput with TM 3 enabled.

- Average throughput of 12.91 Mbps in a 2 x 5 MHz network in Knoxville, TN; at least 20 Mbps for 21.6% of the time

- Average throughput of 24.71 Mbps in a 2 x 10 MHz network in Santa Clara, CA; at least 40 Mbps for 18.5% of the time

- MIMO can double the end user READ MORE >

1.0 Executive Summary

2.0 key conclusions and observations

3.0 Detailed results - low-speed mobility
3.1 Overall Daytime PDSCH and SINR Results
3.2 Sample Nighttime Drive Test Results - Physical Layer Throughput versus SINR
3.2.1 Sample Nighttime Drive Test Results - Knoxville Band 5 Network
3.2.2 Sample Nighttime Drive Test Results - Santa Clara Band 4 Network
3.3 Sample Nighttime Drive Test Results - Physical Layer versus RSRP
3.4 Mapping MIMO Performance Impacts as a Function of SINR
3.5 Sample Nighttime Drive Test Results - PDSCH versus SINR during Cell Handovers

4.0 Detailed results - stationary positions

5.0 Detailed results - high-speed vehicular

6.0 user Experience Tests (web browsing and YouTube)

7.0 Test Methodology

8.0 Final Thoughts

9.0 Appendix

Index of Figures

Figure 1. The Impact of MIMO in a Commercial LTE Network - Band 4 and Band 5
Figure 2. Probability Distribution of Daytime Physical Layer Throughput - Knoxville Band 5 Network
Figure 3. Probability Distribution of Daytime Physical Layer Throughput - Santa Clara Band 4 Network
Figure 4. Daytime Physical Layer Throughput - Knoxville Band 5 Network (geo plot)
Figure 5. Distribution of Daytime Physical Layer Throughput - Santa Clara Band 4 Network (geo plot)
Figure 6. Probability Distribution of Daytime Reported SINR Values- Knoxville Band 5 Network
Figure 7. Probability Distribution of Daytime Reported SINR Values - Santa Clara Band 4 Network
Figure 8. Physical Layer Throughput with TM 3 Enabled, June 18th, 0148 hours - Knoxville Band 5 Network (geo plot)
Figure 9. Transmission Mode Assignments with TM3 Enabled, June 18th, 0148 hours - Knoxville Band 5 Network (geo plot)
Figure 10. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 3 Enabled, June 18th 0148 hours - Knoxville Band 5 Network
Figure 11. Physical Layer Throughput with TM 2 Only, July 19th, 0117 hours - Knoxville Band 5 Network (geo plot)
Figure 12. Transmission Mode Assignments with TM2 Only, June 19th, 0117 hours - Knoxville Band 5 Network (geo plot)
Figure 13. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 2 Only, June 19th 0117 hours - Knoxville Band 5 Network
Figure 14. Physical Layer Throughput with TM 3 Enabled, July 18th, 0232 hours - Santa Clara Band 4 Network (geo plot)
Figure 15. Transmission Mode Assignments with TM3 Enabled, July 18th, 0232 hours Santa Clara Band 4 Network (geo plot)
Figure 16. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 3 Enabled, July 18th 0232 hours Santa Clara Band 4 Network
Figure 17. Physical Layer Throughput with TM 2 Only, July 19th, 0105 hours Santa Clara Band 4 Network (geo plot)
Figure 18. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 2 Only, July 19th 0105 hours Santa Clara Band 4 Network
Figure 19. Physical Layer Throughput Versus RSRP Scatterplot with TM 3 Enabled, July 18th 0127 hours Santa Clara Band 4 Network
Figure 20. Physical Layer Throughput Versus RSRP for all Drive Tests Santa Clara Band 4 Network
Figure 21. Consolidated Physical Layer Throughput Versus RSRP for TM 3 Enabled Versus TM 2 Only Santa Clara Band 4 Network
Figure 22. Physical Layer Throughput Versus SINR for all Drive Tests Knoxville Band 5 Network
Figure 23. Consolidated Physical Layer Throughput Versus SINR for TM 3 Enabled Versus TM 2 Only Knoxville Band 5 Network
Figure 24. Physical Layer Throughput Versus SINR for all Drive Tests Santa Clara Band 4 Network
Figure 25. Consolidated Physical Layer Throughput Versus SINR for TM 3 Enabled Versus TM 2 Only Santa Clara Band 4 Network
Figure 26. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only as a Function of SINR Knoxville Band 5 Network
Figure 27. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only as a Function of SINR Santa Clara Band 4 Network
Figure 28. The Impact of MIMO in a Commercial LTE Network Band 4 and Band 5
Figure 29. Physical Layer Throughput Versus SINR Scatterplot at Edge of Cell with TM 3 Enabled, July 18th 0127 hours Santa Clara Band 4 Network
Figure 30. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only at Edge of Cell as a Function of SINR Knoxville Band 5 Network
Figure 31. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only at Edge of Cell as a Function of SINR Santa Clara Band 4 Network
Figure 32. Locations of Stationary Points - Knoxville
Figure 33. Locations of Stationary Points - Santa Clara
Figure 34. Transport Block Size Assignments with TM 3 Enabled, Point 7 Knoxville, Band 5 Network
Figure 35. Transport Block Size Assignments with TM 2 Only, Point 7 Knoxville, Band 5 Network
Figure 36. Transport Block Size Assignments with TM 3 Enabled, Point 3 Knoxville, Band 5 Network
Figure 37. Transport Block Size Assignments with TM 2 Only, Point 2 Knoxville, Band 5 Network
Figure 38. Transport Block Size Assignments with TM 3 Enabled, Point 2 Santa Clara, Band 4 Network
Figure 39. Transport Block Size Assignments with TM 2 Only, Point 2 Santa Clara, Band 4 Network
Figure 40. Transmission Mode Assignments with TM 3 Enabled, July 18th, 0529 hours Santa Clara Band 4 Network (geo plot)
Figure 41. Transmission Mode Assignments with TM 2 Only, July 19th, 0410 hours Santa Clara Band 4 Network (geo plot)
Figure 42. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 3 Enabled, July 18th 0529 hours Santa Clara Band 4 Network Figure 43. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 2 Only, July 19th 0410 hours Santa Clara Band 4 Network
Figure 44. Physical Layer Throughput Versus Serving PCI with TM 3 Enabled, July 18th 0529 hours Santa Clara Band 4 Network
Figure 45. Physical Layer Throughput Versus Serving PCI with TM 2 Only, July 19th 0410 hours Santa Clara Band 4 Network
Figure 46. Web Page Load Times with and without TM 3 Enabled Knoxville Band 5 Network
Figure 47. Web Page Load Times with and without TM 3 Enabled Santa Clara Band 4 Network
Figure 48. Transport Block Size Assignments with TM 3 Enabled with FTP and Web Browsing, Point 7 Knoxville, Band 5 Network
Figure 49. Transport Block Size Assignments with TM 3 Enabled with Web Browsing, Point 3 Santa Clara, Band 4 Network
Figure 50. Transport Block Size Assignments with TM 2 Only with Web Browsing, Point 3 Santa Clara, Band 4 Network
Figure 51. Physical Layer Throughput with YouTube, Hotel Knoxville, Band 5 Network
Figure 52. Transport Block Size Assignments with TM 3 Enabled with YouTube, Hotel Knoxville, Band 5 Network
Figure 53. XCAL in Action
Figure 54. XCAL in Action
Figure 55. Physical Layer Throughput Versus SINR Scatterplot for Two Devices with TM 3 Enabled, June 18th 0427 hours Knoxville Band 5 Network
Figure 56. Physical Layer Throughput Versus SINR Scatterplot for Two Devices with TM 2 Only, June 19th 0300 hours Knoxville Band 5 Network
Figure 57. Probability Distribution of Physical Layer Throughput for Two Devices with TM 3 Enabled and with TM 2 Only Knoxville Band 5 Network
Figure 58. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 3 Enabled, June 18th 0128 hours Knoxville Band 5 Network
Figure 59. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 2 Only, June 19th 0136 hours Knoxville Band 5 Network
Figure 60. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 3 Enabled, July 18th 0340 hours Santa Clara Band 4 Network
Figure 61. Physical Layer Throughput Versus SINR Scatterplot Plus Assorted KPIs with TM 2 Only, July 19th 0320 hours Santa Clara Band 4 Network
Figure 62. Transport Block Size Assignments with TM 3 Enabled, Point 3 Santa Clara, Band 4 Network
Figure 63. Transport Block Size Assignments with TM 2 Only, Point 3 Santa Clara, Band 4 Network

Index of Tables

Table 1. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only as a Function of SINR Knoxville Band 5 Network
Table 2. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only as a Function of SINR Santa Clara Band 4 Network
Table 3. Rank 2 Indicator Usage as a Function of SINR Knoxville Band 5 Network
Table 4. Rank 2 Indicator Usage as a Function of SINR Santa Clara Band 4 Network
Table 5. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only at Edge of Cell as a Function of SINR Knoxville Band 5 Network
Table 6. Physical Layer Throughput Gains with TM 3 Enabled Versus TM 2 Only at Edge of Cell as a Function of SINR Santa Clara Band 4 Network
Table 7. Comparable Web Page Load Times - Santa Clara Band 4 Network
Table 8. Detailed Results, Part I - Knoxville
Table 9. Detailed Results, Part II - Knoxville
Table 10. Detailed Results, Part I Santa Clara
Table 11. Detailed Results, Part II Santa Clara

Note: Product cover images may vary from those shown

ALSO AVAILABLE

  • Signals Ahead - Product Thumbnail Image Signals Ahead

    Signals Ahead

    • Language: English
    • Published: September 2014
    FROM

RELATED PRODUCTS

Our Clients

Our clients' logos