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Broadband Quality of Service
in Sri Lanka
Test Results
Packages tested
India
Advertised
Download
Speed
Advertised
Upload
Speed
512 kbps
512 kbps
BSNL - Business
2 Mbps
256 kbps
BSNL - Home
2 Mbps
256 kbps
256 kbps
256 kbps
Dialog
2 Mbps
512 kbps
SLT - Business
2 Mbps
512 kbps
512 kbps
128 kbps
1 Mbps
256 kbps
Airtel
Hathway
Sri Lanka
SLT - Home
Singapore
* Partial testing
StarHub*
Test Results
 Throughput (Download speed/Upload speed)
Business Packages performance in
• ISP domain
• Local domain
• International level
Business vs. Home performance
Sri Lanka vs. India/Singapore performance
 Delay metrics (RTT/jitter)
 Loss metrics (Packet Loss)
Test Results
Throughput - Download speed
Download speed (Business Packages):
Relatively healthy in ISP domain…
2,000
2 Mbps
1,800
1,600
> 75%
1,400
1,200
1,000
800
600
400
200
0
08:00
11:30
15:00
SLT (2M/512k)
18:00
Dialog (2M/512k)
20:30
22:30
ISP
Download speed (Business Packages):
… and does not significantly vary among different days
(be it week days or weekend)
Dialog (2M/512k)
SLT (2M/512k)
2000
2000
1800
1800
1600
1600
1400
1400
1200
1200
1000
1000
Week Day 1
Week Day 2
800
800
Week End
600
600
400
400
200
200
0
0
08:00
11:30
15:00
18:00
20:30
22:30
08:00
11:30
15:00
18:00
20:30
22:30
ISP
Download speed (Business Packages):
…poor in Local domain
2 Mbps
2,000
1,800
1,600
> 75%
1,400
1,200
1,000
800
600
400
200
0
08:00
11:30
15:00
SLT (2M/512k)
18:00
20:30
Dialog (2M/512k)
22:30
Local
Download speed (Business Packages): …also variations are
relatively higher among three days (interconnection issues?)
SLT (2M/512k)
Dialog (2M/512k)
2000
2000
1800
1800
1600
1600
1400
1400
1200
1200
Week Day -1
1000
1000
800
800
600
600
400
400
200
200
0
0
08:00
11:30
15:00
18:00
20:30
Week Day - 2
Week End
08:00 11:30 15:00 18:00 20:30 22:30
Local
Download speed (Business Packages):
…even poorer when accessing International sites
2 Mbps
2,000
1,800
1,600
> 75%
1,400
1,200
1,000
800
600
400
200
0
08:00
11:30
15:00
SLT (2M/512k)
18:00
Dialog (2M/512k)
20:30
22:30
Int’l
Download speed (Business Packages):
… that does not significantly vary across days
SLT (2M/512k)
Dialog (2M/512k)
2000
2000
1800
1800
1600
1600
1400
1400
1200
1200
1000
1000
Week Day - 1
Week Day -2
800
800
Weekend
600
600
400
400
200
200
0
0
08:00
08:00
11:30
15:00
18:00
20:30
22:30
11:30
15:00
18:00
20:30
22:30
Int’l
Download speed (SLT Business vs. SLT Home packages):
…in % terms, home is better than business
ISP/WD (%)
INT/WD (%)
L/WD (%)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
08:00 11:30 15:00 18:00 20:30 22:30
08:00
ISP/WE (%)
11:30
15:00
18:00
20:30
22:30
08:00 11:30 15:00 18:00 20:30 22:30
INT/WE (%)
L/WE (%)
100
90
80
70
60
50
40
30
20
10
0
08:00 11:30 15:00 18:00 20:30 22:30
Business
100
90
80
70
60
50
40
30
20
10
0
Home
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
0
0
08:00
11:30
15:00
Business
18:00
20:30
Home
22:30
08:00 11:30 15:00 18:00 20:30 22:30
Business
Home
Download speed (SLT Business vs. SLT Home packages):
…and comparable in reaching international sites
ISP/WD (kbps)
INT/WD(kbps)
L/WD (kbps)
2000
1800
1600
1400
1200
1000
800
600
400
200
0
2000
1800
1600
1400
1200
1000
800
600
400
200
0
2000
1800
1600
1400
1200
1000
800
600
400
200
0
08:00 11:30 15:00 18:00 20:30 22:30
08:00 11:30 15:00 18:00 20:30 22:30
ISP/WE (kbps)
08:00 11:30 15:00 18:00 20:30 22:30
INT/WE (kbps)
L/WE(kbps)
2000
2000
2000
1800
1800
1800
1600
1600
1600
1400
1400
1400
1200
1200
1200
1000
1000
1000
800
800
800
600
600
600
400
400
400
200
200
200
0
0
08:00
11:30
15:00
Business
18:00
20:30
Home
22:30
0
08:00 11:30 15:00 18:00 20:30 22:30
Business
Home
08:00 11:30 15:00 18:00 20:30 22:30
Business
Home
Download speed: India and Sri Lanka (ISP Domain):
Sri Lanka performs slightly better
100%
90%
80%
> 75%
70%
60%
Airtel (512k/512k)
50%
BSNL - Business (2M/256k)
BSNL - Home (2M/256k)
40%
Hathway (256k/256k)
30%
Dialog (2M/512k)
SLT - Business (2M/512k)
20%
SLT - Home (512k/128k)
10%
0%
08:00
11:30
15:00
18:00
20:30
22:30
ISP
Download speed: India and Sri Lanka (Local Domain):
India performs better
100%
90%
80%
> 75%
70%
60%
Airtel (512k/512k)
50%
BSNL - Business (2M/256k)
BSNL - Home (2M/256k)
40%
Hathway (256k/256k)
Dialog (2M/512k)
30%
SLT - Business (2M/512k)
20%
SLT - Home (512k/128k)
10%
0%
08:00
11:30
15:00
18:00
20:30
22:30
Local
Download speed: India and Sri Lanka (accessing
International servers): India looks good
100%
90%
80%
> 75%
70%
60%
Airtel (512k/512k)
50%
BSNL - Business (2M/256k)
BSNL - Home (2M/256k)
40%
Hathway (256k/256k)
30%
Dialog (2M/512k)
SLT - Business (2M/512k)
20%
SLT - Home (512k/128k)
10%
0%
08:00
11:30
15:00
18:00
20:30
22:30
Int’l
Download speed Sri Lanka and Singapore (accessing
International servers): Singapore wins
100%
90%
80%
70%
> 75%
60%
50%
40%
SLT (2M/512k)
30%
Dialog (2M/512k)
20%
Starhub (1M/256k)
10%
0%
Int’l
Test Results
Throughput - Upload speeds
Upload speed (Business packages):
Somewhat healthy in ISP domain
600
512 kbps
500
400
> 75%
300
200
SLT(2M/512k)
100
Dialog (2M/512k)
0
08:00
11:30
15:00
18:00
20:30
22:30
ISP
Upload speed (Business packages):
…a bit down at Local Domain
600
512 kbps
500
400
> 75%
SLT (2M/512k)
300
Dialog (2M/512k)
200
100
0
08:00
11:30
15:00
18:00
20:30
22:30
Local
Upload speed (Business packages):
…and poor in accessing International sites
600
512 kbps
500
> 75%
400
SLT(2M/512k)
300
Dialog (2M/512k)
200
100
0
08:00
11:30
15:00
18:00
20:30
22:30
Int’l
Upload speed (SLT Business vs. SLT Home packages): …here too
in %, home is better than business, but not in actual speeds
ISP/WD (%)
INT/WD (%)
L/WD (%)
100
100
100
90
90
90
80
80
80
70
70
70
60
60
60
50
50
50
40
40
40
30
30
30
20
20
20
10
10
10
0
0
08:00
11:30
15:00
18:00
20:30
22:30
11:30
15:00
18:00
20:30
22:30
11:30
15:00
Business
18:00
20:30
Home
22:30
11:30
15:00
18:00
20:30
22:30
INT/WE (%)
100
90
80
70
60
50
40
30
20
10
0
08:00
08:00
L/WE (%)
100
90
80
70
60
50
40
30
20
10
0
(aprox 200 kpbs)
0
08:00
ISP/WE(%)
(aprox 100 kpbs)
100
90
80
70
60
50
40
30
20
10
0
08:00
11:30
15:00
Business
18:00
20:30
Home
22:30
08:00 11:30 15:00 18:00 20:30 22:30
Business
Home
Upload speed Sri Lanka and Singapore (accessing
International sites): Singapore wins
100%
90%
80%
> 75%
70%
60%
50%
40%
30%
SLT (2M/512k)
Dialog (2M/512k)
Starhub (1M/256k)
20%
10%
0%
Int’l
Test Results
Jitter and Packet Loss
Jitter : Sometimes not enough quality for video/high
quality audio (<+10ms) but satisfactory for other apps
ISP -weekday
Local - weekday
50
45
40
35
30
25
20
15
10
5
0
INT-weekday
50
45
40
35
30
25
20
15
10
5
0
08:00
11:30
15:00
18:00
20:30
22:30
50
45
40
35
30
25
20
15
10
5
0
08:00
ISP- weekend
11:30
15:00
18:00
20:30
22:30
Local - weekend
50
45
40
35
30
25
20
15
10
5
0
1113
SLTB
1507
1816
DialogB
2023
SLTH
2226
08:00
11:30
SLTB
15:00
18:00
DialogB
11:30
15:00
18:00
20:30
22:30
20:30
22:30
INT -weekend
50
45
40
35
30
25
20
15
10
5
0
806
08:00
20:30
SLTH
22:30
50
45
40
35
30
25
20
15
10
5
0
08:00
11:30
SLTB
15:00
18:00
DialogB
SLTH
Packet Loss : Most of the times, but not always, within
acceptable limits (5%)
ISP –Week Day
Local –Week Day
INT –Week Day
30%
30%
30%
25%
25%
25%
20%
20%
20%
15%
15%
15%
10%
10%
10%
5%
5%
5%
0%
0%
0%
08:00 11:30 15:00 18:00 20:30 22:30
08:00
11:30
ISP –Weekend
15:00
18:00
20:30
22:30
08:00
Local –Weekend
30%
30%
25%
25%
25%
20%
20%
20%
15%
15%
15%
10%
10%
10%
5%
5%
5%
08:00 11:30 15:00 18:00 20:30 22:30
SLTB
Dialog
SLTH
0%
15:00
18:00
20:30
22:30
INT –Weekend
30%
0%
11:30
0%
08:00
11:30
SLTB
15:00
18:00
Dialog
20:30
SLTH
22:30
08:00
11:30
SLTB
15:00
18:00
Dialog
20:30
SLTH
22:30
Where is the bottleneck?
Accessing www.lankacom.net through SLT (2M/512k)
170 ms
65 ms
25 ms
10 ms
Local
NB: All IP addresses are within SL (www.whois.net)
Accessing www.yahoo.com through SLT (2M/512k)
170 ms
65 ms
25 ms
10 ms
NB: Upto 5th hop IP addresses are within SL (www.whois.net)
Int’l
Using RTT/latency in broadband QoS regulation
Local Network Latency (LNL): Round Trip Time (RTT)
taken to access a national or site hosted within the
country
Requirement: LNL < 85ms for 95% of the peak time
International Network Latency (INL) : Round Trip Time
(RTT) to the first US entry point.
Requirement: INL < 300ms for 95% of the peak time
Where do
we stand?
ISP1 – Out:
Exit from local
ISP
FEP: First Entry
point to USA
Local Network Latency
International Network Latency
Package
Requirement
Achivement
Airtel (512k/512k)
85 ms
8 ms
BSNL (2M/256k)
85 ms
191 ms
SLT (2M/512k)
85 ms
11 ms
Passed? Requirement



Value
Passed?
300 ms
217
300 ms
295
300 ms
258



Few points to ponder
o Do we always get what is promised, especially when
downloading from International sites?
o Are these trends transitional or long-term?
o Are Home packages better value for money than
Business packages?
o Can we be complacent because the situation is not too
different in India?
o Should we demand better QoS for Games/video?
o Should we adopt Singapore standards or more
stringent ones?
Thank You!
[email protected]
www.lirneasia.net
Thanks to LIRNEasia team, Prof. Timothy Gonsalves and team, Ranga
Kamaladasa, Sriganesh Lokanathan, Sanjana Hattotuwa, Sanath Siriwardena
and all who contributed ideas/opinions in online discussions at LIRNEasia blog.