2021 umlaut southkorea auditreport v5
TRANSCRIPT
South Korea, Seoul & Busan, 2021
Audit Report.
Foreword
For the inhabitants of the denselypopulated Seoul and Busan areas inSouth Korea, it is particularlyinteresting to see how the operatorsperform in their home cities.Therefore, we have performedindividual analyses for the twolargest South Korean metropolitanareas.
More than 13 million (or 25% percent of all) South Koreans live in one of the two largest urban areas of the country. Therefore we have taken a closer look at the individual resultsof Seoul and Busan.
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The leader in mobile benchmarking, umlaut, has analyzed
the mobile networks in South Korea with regards to 5G
mobile network performance.
We measure smartphone data performance based on
extensive drivetests.
As the de-facto industry standard, our benchmarking
methodology focuses on customer-perceived network
quality and covers a wide range of mobile services.
Today, more than 200 mobile networks in more than 120
countries are being evaluated by our unique methodology.
It allows a technical analysis that is unprecedented in its
level of detail and enables comparisons between the net-
work performance and capability of each mobile network.
Our benchmarks help network operators to demonstrate
how well they are delivering wireless connections to
consumers, business users and enterprises and reveals the
areas of improvement.
Testing areaIntro
2070 kmmeasuring distance
Busan
Seoul
Drivetest Voice Data
Device Samsung Galaxy S21+ 5G (Exynos) SM-G996N Samsung Galaxy S21+ 5G (Exynos) SM-G996N
Test Cases Mobile-to-MobileSide1 (5G pref) to Side2 (5G pref) 115 sec call window70 sec call duration15 sec call setup timeoutMulti-RAB traffic injection on both sides
Data 5G preferredHTTP DL datastream 7sHTTP UL datastream 7sHTTP 10MB DL fixed file transferHTTP 5MB UL fixed file transferWeb Browsing - Kepler ETSI Ref. Page10 Live web pages 3 YouTube ( videos ~ 45s)
Mobility andRoute Types 100% Drivetest
Samples ~ 5,735 ~ 58,000
Dates 10 measurement days; 22.07.2021 – 04.08.2021
The map shows the total driving area for South Korea.
The routes were independently selected by umlaut based
on the official coverage maps provided by the network
operators.
5G Coverage Maps LG U+:http://www.uplus.co.kr/css/iner/RetrieveCoverMapNoneSSL.hpi
5G Coverage Maps KT:https://coverage.kt.com/
5G Coverage Maps SKT:http://www.sktcoverage.com/
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Available Frequency SpectrumFor LTE and 5G NR
The graph shows the maximum amount of frequency spectrum available for the respective technology, based on all obser-
ved File DL use cases. The actual amount of frequency spectrum available for a particular File Download can be (a) a
combination of the LTE and NR resources and (b) lower than the maximum owing to shared resources or spectrum availability.
120LTE Spectrum
0
NR Spectrum
SKT
75
SKT
100
KT
55
LG U+
50
KT
100
LG U+
80
[MH
z]
LTE NR Cband
LG U+ 3CA:50Mhz 80Mhz
SKT 5CA:75Mhz 100Mhz
KT 4CA:55Mhz 100Mhz
The table shows the maximum amount of frequency spectrum and LTE carrier aggregation available per operator, based
on all observed File DL use cases.
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Total Score Overall results
Score achieved in Seoul by the networks under test. Score achieved in Busan by the networks under test.
Total Score - Seoul1000 Dots
KT
589
382
SKT
586
346
- S
how
n to
tal s
core
s ar
e ro
und
ed.
LG U+
585
394
Voicemax. 400
Datamax. 600
Operator
979 971932
Total Score - Busan1000 Dots
KT
583
381
SKT
592
339
- S
how
n to
tal s
core
s ar
e ro
und
ed.
LG U+
580
375
Voicemax. 400
Datamax. 600
Operator
955 964931
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5G AvailabilityMeasured from UE
The graph shows the 5G availability measured in Seoul and Busan. All data sequences from the umlaut use case are taken
into account.
100Seoul
[%]
0
Busan
SKT
86.4
SKT
71.6
KT
86.6
LG U+
98.9
KT
86.5
LG U+
85.9
The table shows the 5G availability measured in Seoul and Busan. All data sequences from the umlaut use case are taken
into account.
5G availability is defined as the share of time a user is actually using the 5G network (represented by the percentage of
test cases during which the UE was using 5G).
Technology List Unit LG U+ KT SKT
Seoul
NR [%] 0 0 0
5G [%] [%] 98.85 86.63 86.42
5G-LTE Mixed Session [%] 0.9 13.22 13.41
LTE [%] 0.25 0.15 0.17
Busan
NR [%] 0 0 0
5G [%] 85.9 86.51 71.62
5G-LTE Mixed Session [%] 13.62 13.08 27.4
LTE [%] 0.48 0.41 0.97
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5G User ExperienceHow 5G NR contributes to the overall end-user download throughput
The chart shows the estimated contribution of 5G NR to the overall achieved Avg. Download Throughput in Seoul and
Busan, based on the proportion of LTE and NR PDSCH data rates on all sequences with full NR activity. (Avg. Throughput
in lighter shade, 5G Contribution to Avg. Throughput in darker shade.)
The table shows the estimated contribution of 5G NR to the overall achieved Avg. Download Throughput in Seoul and
Busan, based on the proportion of LTE and NR PDSCH data rates on all sequences with full NR activity.
KPI Name Unit LG U+ KT SKT
Avg. ThroughputSeoul [Mbit/s] 741.640 580.788 725.349
Busan [Mbit/s] 525.126 566.939 693.178
5G Contribution to Avg. Throughput
Seoul [Mbit/s] 603.851 580.739 542.014
Busan [Mbit/s] 425.480 566.896 536.437
542.0 536.4580.7603.9
566.9
425.5
750
[Mbi
t/s]
0 SKT SKTKTLG U+ KTLG U+
Seoul Busan
725.3693.2
580.8
741.6
566.9525.1
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5G User ExperienceHow 5G NR contributes to the overall end-user upload throughput
The chart shows the estimated contribution of 5G NR to the overall achieved Avg. Upload Throughput in Seoul and Busan,
based on the proportion of LTE and NR bearer throughputs on all sequences with full NR activity. (Avg. of UL Throughput
in lighter shade, Avg. NR Contribution of UL Throughput in darker shade.)
The table shows the estimated contribution of 5G NR to the overall achieved Avg. Upload Throughput in Seoul and Busan,
based on the proportion of LTE and NR bearer throughputs on all sequences with full NR activity.
KPI Name Unit LG U+ KT SKT
Average of UL Throughput Seoul [Mbit/s] 95.082 77.148 113.643
Busan [Mbit/s] 62.169 69.341 110.679
Average NR Contribution of UL Throughput
Seoul [Mbit/s] 56.108 77.148 83.376
Busan [Mbit/s] 23.325 69.334 82.343
83.4 82.377.177.1
56.1
23.3
115
[Mbi
t/s]
0 SKT SKTKTLG U+ KTLG U+
Seoul Busan
113.6 110.7
95.1
69.3
69.3
62.2
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Avg., P90 and P10 Throughputs
The graph shows the Session Reliability measured in Seoul and Busan. All data sequences from the umlaut use case are
taken into account
100
[%]
0 SKT
100
SKT
100
KT
100
LG U+
100
KT
100
LG U+
99.8
Seoul Busan
1054.6
897.5841.6
1047.6
843.7
730.7
1100
[Mbi
t/s]
0 SKT
415.8
SKT
424.8
KT
336.9
LG U+
438.8
KT
307.8
LG U+
290.6
714.8654.0
576.3
736.1
561.6515.6
Seoul Busan
Datastream Download Session Reliability
The graph shows the qualified data stream 10 % (Mbps, darker shade), the average throughput (lighter shade) and the
qualified data stream 90 % (Mbps, lightest shade) measured in Seoul and Busan. All data sequences from the umlaut use
case are taken into account.
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Datastream UploadSession Reliability
Avg., P90 and P10 Throughputs
100
[%]
0 SKT
99.9
SKT
100
KT
100
LG U+
100
KT
99.8
LG U+
100
Seoul Busan
142.5
96.5
118.7
94.487.4
54.164.2
54.1
67.5
32.926.4
150
[Mbi
t/s]
0 SKT SKTKTLG U+ KTLG U+
Seoul Busan
112.8105.7
143.9
76.7
94.6
68.860.7
The graph shows the Session Reliability measured in Seoul and Busan. All data sequences from the umlaut use case are
taken into account
The graph shows the qualified data stream 10 % (Mbps, darker shade), the average throughput (lighter shade) and the
qualified data stream 90 % (Mbps, lightest shade) measured in Seoul and Busan. All data sequences from the umlaut use
case are taken into account.
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10Mb File Download Session Reliability
Overall Session Time
100
[%]
0 SKT
100
SKT
100
KT
100
LG U+
100
KT
99.8
LG U+
100
Seoul Busan1
[s]
0 SKT
0.8
SKT
0.6
KT
0.7
LG U+
0.5
KT
0.9
LG U+
0.8
Seoul Busan
The graph shows the Session Reliability measured in Seoul and Busan. All data sequences from the umlaut use case are
taken into account.
The graph shows the Overall Session Time measured in Seoul and Busan. All data sequences from the umlaut use case
are taken into account.
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5Mb File Upload Session Reliability
Overall Session Time
The graph shows the Session Reliability measured in Seoul and Busan. All data sequences from the umlaut use case are
taken into account.
The graph shows the Overall Session Time measured in Seoul and Busan. All data sequences from the umlaut use case
are taken into account.
100
[%]
0 SKT
100
SKT
100
KT
100
LG U+
100
KT
100
LG U+
100
Seoul Busan1.5
[s]
0 SKT
0.9
SKT
0.9
KT
1.0
LG U+
0.8
KT
1.3
LG U+
1.5
Seoul Busan
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VoiceSpeech Quality
Call Setup Time
The graph shows the Speech Quality measured in Seoul and Busan. All data sequences from the umlaut use case are
taken into account.
The graph shows the Call Setup Time measured in Seoul and Busan. All data sequences from the umlaut use case are
taken into account.
5
[MO
S-LQ
O]
0 SKT
4.4
KT
4.2
LG U+
4.5
SKT
4.4
KT
4.1
LG U+
4.4
Seoul Busan5
[s]
0 SKT
4.4
KT
2.4
LG U+
0.6
SKT
4.5
KT
2.6
LG U+
3.1
Seoul Busan
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Achieved values of all networks under test in each of the relevant Data Key Performance Indicators (KPIs) in Busan from all
collected test samples.
Achieved values of all networks under test in each of the relevant Data Key Performance Indicators (KPIs) in Seoul from all
collected test samples.
Busan KPI Name Unit LG U+ KT SKT
HTTP Web Page DL Smartphone
Qualifier [%] 99,9 99,7 100,0
Overall Session Time [s] 1,6 1,4 1,4
HTTP 10MB DL Smartphone
Qualifier [%] 100,0 99,8 100,0
Overall Session Time [s] 0,8 0,9 0,6
90% faster than [Mbit/s] 65,3 121,9 160,4
10% faster than [Mbit/s] 281,9 191,8 334,7
HTTP 5MB UL Smartphone
Qualifier [%] 100,0 100,0 100,0
Average Session Time [s] 1,5 1,3 0,9
90% faster than [Mbit/s] 16,6 22,7 36,3
10% faster than [kbit/s] 65,1 69,8 87,0
HTTP DL FDTT
Qualifier [%] 99,8 100,0 100,0
10% faster than [Mbit/s] 730,7 843,7 897,5
faster than 5 Mbit/s [%] 99,8 99,8 100,0
faster than 20 Mbit/s [%] 99,5 99,8 100,0
HTTP UL FDTT
Qualifier [%] 100,0 99,8 100,0
10% faster than [Mbit/s] 87,4 94,4 143,9
faster than 5 Mbit/s [%] 99,1 99,7 100,0
faster than 20 Mbit/s [%] 98,0 98,9 100,0
YouTube
Qualifier [%] 100,0 99,7 100,0
Start Time [s] 1,4 1,4 1,4
AVG Resolution [p] 1079,2 1080,0 1080,0
YouTube Live Smartphone
Qualifier [%] 100,0 100,0 100,0
Start Time [s] 2,2 2,0 2,1
AVG Resolution [p] 1080,0 1080,0 1080,0
YouTube 4K Smartphone
Qualifier [%] 98,4 99,7 100,0
Start Time [s] 1,4 1,4 1,4
AVG Resolution [p] 2151,1 2151,9 2155,7
Seoul KPI Name Unit LG U+ KT SKT
HTTP Web Page DL Smartphone
Qualifier [%] 99,7 99,9 99,9
Overall Session Time [s] 1,3 1,3 1,5
HTTP 10MB DL Smartphone
Qualifier [%] 100,0 100,0 100,0
Overall Session Time [s] 0,5 0,7 0,8
90% faster than [Mbit/s] 167,0 133,5 132,1
10% faster than [Mbit/s] 312,5 225,4 223,3
HTTP 5MB UL Smartphone
Qualifier [%] 100,0 100,0 100,0
Average Session Time [s] 0,8 1,0 0,9
90% faster than [Mbit/s] 42,4 41,0 43,4
10% faster than [kbit/s] 79,8 75,3 81,5
HTTP DL FDTT
Qualifier [%] 100,0 100,0 100,0
10% faster than [Mbit/s] 1047,6 841,6 1054,6
faster than 5 Mbit/s [%] 100,0 100,0 100,0
faster than 20 Mbit/s [%] 100,0 100,0 100,0
HTTP UL FDTT
Qualifier [%] 100,0 100,0 99,9
10% faster than [Mbit/s] 118,7 96,5 142,4
faster than 5 Mbit/s [%] 100,0 99,9 100,0
faster than 20 Mbit/s [%] 99,9 99,9 100,0
YouTube
Qualifier [%] 100,0 100,0 99,8
Start Time [s] 1,4 1,3 1,5
AVG Resolution [p] 1077,6 1078,5 1079,9
YouTube Live Smartphone
Qualifier [%] 98,8 100,0 99,8
Start Time [s] 2,1 2,1 2,4
AVG Resolution [p] 1079,9 1080,0 1080,0
YouTube 4K Smartphone
Qualifier [%] 98,8 99,8 99,2
Start Time [s] 1,4 1,4 1,5
AVG Resolution [p] 2151,2 2153,2 2151,2
KPI overview — DataSeoul
Busan
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KPI overview — VoiceSeoul and Busan
Achieved values of all networks under test in each of the relevant Voice Key Performance Indicators (KPIs) for Seoul.
Achieved values of all networks under test in each of the relevant Voice Key Performance Indicators (KPIs) for Busan.
Voice Service Group Unit LG U+ KT SKT
Busan
Qualifier [%] 100,0 100,0 99,9
Call Setup Time (P90) [s] 3,1 2,6 4,5
Speech Quality (P10) [MOS-LQO] 4,5 4,1 4,4
Multirab connectivity [%] 100,0 100,0 99,7
Voice Service Group Unit LG U+ KT SKT
Seoul
Qualifier [%] 99,8 99,8 100,0
Call Setup Time (P90) [s] 0,6 2,4 4,4
Speech Quality (P10) [MOS-LQO] 4,4 4,1 4,4
Multirab connectivity [%] 99,8 99,9 100,0
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Key takeaways
KT achieves the highest score in Busan.
In Busan SKT provides the fastest average download speed.
KT has the highest 5G Availability in Busan.
SKT achieves the highest data score in Busan.
In Seoul, LG U+ achieves the highest umlaut score.
LG U+ has the highest average download speed in Seoul.
LG U+ provides the highest 5G Availability in Seoul.
KT achieves the highest data score in Seoul.
LG U+ has the highest voice per-formance in Seoul, providing the shortest Call Setup Time and a very good speech quality.
Seoul Busan
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umlaut SE
Am Kraftversorgungsturm 3 · 52070 Aachen · Germany
Hakan Ekmen · Chief Executive Officer Telecommunication
cell +49 151 571 33 235 · [email protected]
www.umlaut.com