the impact of gigabit lte technologies on the ... - qualcomm
TRANSCRIPT
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The Impact of Gigabit LTE Technologies on the User Experience
Michael Thelander, President
October 2017
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▪ A Category 16 Gigabit LTE smartphone meaningfully improves the user
experience with real-world applications
− YouTube and Streaming Video
− Google-based Applications
▪ Gigabit LTE is more compelling than public Wi-Fi, thanks primarily to limited
backhaul
▪ Gigabit LTE with LAA provides a great user experience with unlicensed spectrum
▪ A Category 16 smartphone greatly increases network efficiency with all
conditions
Key Highlights
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▪ The Benefits of a Cat 16 Gigabit LTE Device with Real-World Apps
▪ The Benefits of Cat 16 Gigabit LTE versus Public Wi-Fi
▪ The Benefits of Cat 16 Gigabit LTE with LAA
▪ The Impact of Cat 16 Gigabit LTE Devices on Overall Spectral Efficiency
Today’s Agenda
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Google Play Download – Excellent Conditions
▪ Angry Birds (348 MB file) downloaded 3 times
▪ Downloads occurred simultaneously on both phones
Cat 16 = Faster Downloads Cat 16 = Fewer Resources
*RSRP = -75 dBm; SINR = 24 dB
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Google Play Download – Excellent Conditions
▪ Cat 16 smartphone used 3 data streams for 100% of
the download
▪ Cat 12 smartphone only supported 2 data streams
Real Time Throughput Analysis
Cat 16 = Higher MIMO Rank
*RSRP = -75 dBm; SINR = 24 dB
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Google Play Download – Edge of Cell Conditions
Cat 16 = Faster Downloads Cat 16 = Fewer Resources Cat 16 = Better MIMO Rank
*RSRP = -111 dBm; SINR = 12.2 dB
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Google Play Download – Edge of Cell Conditions
Real Time Throughput Analysis
*RSRP = -111 dBm; SINR = 12.2 dB
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Google Drive Downloads – Excellent Conditions(3 videos, 1 2 GB Log File)
Cat 16 = Faster Downloads Cat 16 = Fewer Resources
*RSRP = -75 dBm; SINR = 24 dB
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Google Drive Download – Excellent Conditions
Real Time Throughput Analysis
Cat 16 = Higher MIMO Rank
▪ Cat 16 uses at least 3 parallel data streams
▪ Cat 12 only uses 2 parallel data streams
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Google Drive Downloads – Edge of Cell Conditions
Cat 16 = Faster Downloads Cat 16 = Fewer Resources
Cat 16 = Better MIMO Rank
*RSRP = -111 dBm; SINR = 12.2 dB
▪ Cat 16 uses 2 parallel data streams
▪ Cat 12 only uses 1 data stream
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Google Drive Downloads – Edge of Cell Conditions
*RSRP = -111 dBm; SINR = 12.2 dB
Real Time Throughput Analysis
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Our Video Test Methodology
▪ Use Chromatic, a vision-based capture tool, to analyze video delivery performance as observed on the smartphone display
▪ Combine video results with chipset diagnostic message information – Link Master Logging and Link Master Analyzer
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YouTube – Edge of Cell Conditions
Real Time Throughput Analysis
*RSRP = -111 dBm; SINR = 12.2 dB
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YouTube – Edge of Cell Conditions
▪ Network efficiency gain due entirely to 4-way receive
diversity
▪ Benefits realized with moderate / low bit rates
Cat 16 = Fewer Resources
*RSRP = -111 dBm; SINR = 12.2 dB
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Video Streaming @ 15 Mbps Encoding – Edge of Cell
Real Time Throughput Analysis
*RSRP = -111 dBm; SINR = 12.2 dB
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Video Streaming @ 15 Mbps Encoding – Edge of Cell
Cat 16 = Higher MIMO Rank
Cat 16 = Fewer Resources
▪ Cat 16 superior performance due
entirely to 4-way receive diversity,
which increased MIMO rank
*RSRP = -111 dBm; SINR = 12.2 dB
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Video Streaming @ 15 Mbps Encoding – Edge of Cell
Video Freezes Video Impairments
Audio/Video Synch Issues
*RSRP = -111 dBm; SINR = 12.2 dB
▪ Cat 16 gives a better
video viewing experience
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Video Streaming @ 15 Mbps Encoding – Good Conditions
Real Time Throughput Analysis
* RSRP = -92 dBm; SINR = 18 dB
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Video Streaming @ 15 Mbps Encoding – Good Conditions
Cat 16 = Higher MIMO Rank
Cat 16 = Fewer Resources
▪ Cat 16 used higher MIMO rank, up to
Rank Indicator 4
* RSRP = -92 dBm; SINR = 18 dB
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▪ The Benefits of a Cat 16 Gigabit LTE Device with Real-World Apps
▪ The Benefits of Cat 16 Gigabit LTE versus Public Wi-Fi
▪ The Benefits of Cat 16 Gigabit LTE with LAA
▪ The Impact of Cat 16 Gigabit LTE Devices on Overall Spectral Efficiency
Today’s Agenda
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Cat 16 and Public Wi-Fi
Google Play Google DriveGoogle Music
Cat 16 Faster Downloads Cat 16 Faster Downloads
Cat 16 Faster Downloads
* LTE RSRP = -89 dBm; LTE SINR = 25 dB
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▪ The Benefits of a Cat 16 Gigabit LTE Device with Real-World Apps
▪ The Benefits of Cat 16 Gigabit LTE versus Wi-Fi
▪ The Benefits of Cat 16 Gigabit LTE with LAA
▪ The Impact of Cat 16 Gigabit LTE Devices on Overall Spectral Efficiency
Today’s Agenda
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Cat 16 with LAA versus Cat 12
▪ Operator small cell deployment
in downtown San Francisco
▪ Small cell supports
− one licensed band (Band 2, 20
MHz FDD)
− 3 unlicensed bands (20 MHz FDD
each)
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Walk Test(Cat 16 with LAA versus Cat 12)
Real Time Throughput Analysis
Total Throughput
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Google Play Downloads(Cat 16 with LAA versus Cat 12)
Real Time Throughput Analysis
Total Throughput
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Google Play Downloads(Cat 16 with LAA versus Cat 12)
Cat 16 MIMO Rank
Cat 16 Modulation
Cat 16 = Faster Downloads
▪ Cat 16 used 4 data streams with high
modulation in licensed band
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▪ The Benefits of a Cat 16 Gigabit LTE Device with Real-World Apps
▪ The Benefits of Cat 16 Gigabit LTE versus Wi-Fi
▪ The Benefits of Cat 16 Gigabit LTE with LAA
▪ The Impact of Cat 16 Gigabit LTE Devices on Overall Spectral Efficiency
Today’s Agenda
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Our Drive Test Methodology
▪ Conduct all tests with a Cat 16 and a Cat 12 smartphone, operating in parallel
▪ Collect network parameters and device-specific performance information with XCAL-Solo
▪ Analyze results with XCAP post processing software
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Suburban Network Efficiency Drive Test - Methodology
▪ 4x4 MIMO Cluster – Band 4 (20
MHz FDD)
▪ Drive Test with Full Buffer UDP
data transfers
▪ Cat 16 and Cat 12 smartphones
operating in parallel
▪ 86 minutes of logged data
▪ Results filtered to exclude phones
on different cells and no data
transfers
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Suburban Network Efficiency Drive Test - Results
Cat 16 = Higher MIMO Rank Cat 16 = Higher Modulation
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Suburban Network Efficiency Drive Test – Results II
▪ Cat 16 performance gains were evident with all network conditions
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Rural Network Efficiency Drive Test - Methodology
▪ 4x4 Cluster – Band 4 (20 MHz FDD)
with low signal strength (Median
RSRP = -107 dBm)
▪ Drive Test with Full Buffer UDP
data transfers
▪ Cat 16 and Cat 12 smartphones
operating in parallel
▪ Drive route repeated twice
▪ Results filtered to exclude phones
on different cells and no data
transfers
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Rural Network Efficiency Drive Test - Results
Cat 16 = Higher MIMO Rank
Cat 16 = Higher Modulation
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Rural Network Efficiency Drive Test – Results II
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Suburban Network Efficiency Walk Test
MIMO Rank (Cat 16 Smartphone)
* RSRP = -75 dBm; SINR = 24 dB
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Suburban Network Efficiency Walk Test - Results
Cat 16 = Higher MIMO Rank Cat 16 = Higher Modulation
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Suburban Network Efficiency Walk Test – Results II
* RSRP = -75 dBm; SINR = 24 dB
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▪ A Cat 16 Gigabit LTE smartphone increases spectral efficiency by 30-40%, on
average
− Higher MIMO rank with favorable conditions (RI=3 or 4 versus RI=2)
− 4-branch receive diversity increases MIMO rank, MCS values, etc. under all conditions
▪ The network efficiency gains are realized with real world applications
▪ A Cat 16 smartphone delivers a better user experience
− Faster downloads
− Videos that play uninterrupted versus freezes and impairments
− LAA improves the user experience with >2x data speeds compared with Cat
12 and only licensed spectrum while allowing the mobile operator to tap into
unlicensed spectrum (3x20 MHz)
Final Thoughts
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