Broadband Quality of Service in Sri Lanka -...
Transcript of Broadband Quality of Service in Sri Lanka -...
Broadband Quality of Servicein Sri Lanka
Test Results
AdvertisedDownload
Speed
Advertised Upload Speed
India Airtel 512 kbps 512 kbps
BSNL - Business 2 Mbps 256 kbps
BSNL - Home 2 Mbps 256 kbps
Hathway 256 kbps 256 kbps
Sri Lanka Dialog 2 Mbps 512 kbps
SLT - Business 2 Mbps 512 kbps
SLT - Home 512 kbps 128 kbps
Singapore StarHub* 1 Mbps 256 kbps
Packages tested
* Partial testing
Test ResultsThroughput (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
2 Mbps
Download speed (Business Packages): Relatively healthy in ISP domain…
> 75%
ISP
SLT (2M/512k) Dialog (2M/512k)
Download speed (Business Packages): … and does not significantly vary among different days (be it week days or weekend)
ISP
2 Mbps
Download speed (Business Packages):…poor in Local domain
> 75%
Local
SLT (2M/512k) Dialog (2M/512k)
Download speed (Business Packages): …also variations are relatively higher among three days (interconnection issues?)
Local
2 Mbps
Download speed (Business Packages): …even poorer when accessing International sites
> 75%
Int’l
SLT (2M/512k) Dialog (2M/512k)
Download speed (Business Packages): … that does not significantly vary across days
Int’l
Download speed (SLT Business vs. SLT Home packages): …in % terms, home is better than business
Download speed (SLT Business vs. SLT Home packages): …and comparable in reaching international sites
Download speed: India and Sri Lanka (ISP Domain):Sri Lanka performs slightly better
ISP
> 75%
Download speed: India and Sri Lanka (Local Domain): India performs better
Local
> 75%
Download speed: India and Sri Lanka (accessing International servers): India looks good
Int’l
> 75%
Download speed Sri Lanka and Singapore (accessing International servers): Singapore wins
Int’l
> 75%
Test Results
Throughput - Upload speeds
512 kbps
Upload speed (Business packages):Somewhat healthy in ISP domain
ISP
> 75%
512 kbps
Upload speed (Business packages):…a bit down at Local Domain
Local
> 75%
512 kbps
Upload speed (Business packages):…and poor in accessing International sites
Int’l
> 75%
Upload speed (SLT Business vs. SLT Home packages): …here too in %, home is better than business, but not in actual speeds
(aprox 100 kpbs)
(aprox 200 kpbs)
Upload speed Sri Lanka and Singapore (accessing International sites): Singapore wins
Int’l
> 75%
Test Results
Jitter and Packet Loss
Jitter (in ms): Sometimes not enough quality for video/high quality audio but satisfactory for other applications
ISP –Week Day Local –Week Day INT –Week Day
ISP –Weekend Local –Weekend INT –Weekend
Packet Loss : Most of the times, but not always, within acceptable limits (5%)
Where is the bottleneck?
Accessing www.lankacom.net through SLT (2M/512k)
NB: All IP addresses are within SL (www.whois.net)
65 ms
25 ms
170 ms
10 ms
Local
Accessing www.yahoo.com through SLT (2M/512k)
NB: Upto 5th hop IP addresses are within SL (www.whois.net)
65 ms
25 ms
170 ms
10 ms
Int’l
Using RTT/latency in broadband QoSregulation
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?
PackageLocal Network Latency International Network Latency
Requirement Achivement Passed? Requirement Value Passed?
Airtel (512k/512k) 85 ms 8 ms ☺ 300 ms 217 ☺BSNL (2M/256k) 85 ms 191 ms 300 ms 295 ☺SLT (2M/512k) 85 ms 11 ms ☺ 300 ms 258 ☺
ISP1 – Out:Exit from local ISP
FEP: First Entry point to USA
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 Should we demand better QoS for Games/video?
o Can we be complacent because the situation is not too different in India?
o Should we adopt Singapore standards or more stringent ones?
Thank You!
Thanks to LIRNEasia team, Prof. Timothy Gonsalves and team, Sriganesh Lokanathan, Sanjana Hattotuwa, Sanath Siriwardena and all who contributed ideas/opinions in online discussions at LIRNEasia blog.
Local Loop Unbundling (LLU)
• Legislated in only few South-East Asian countries including South Korea, Hong Kong, Taiwan and Malaysia– Mandatory LLU legislation in Hong Kong to be fully
withdrawn by June 2008, on the basis that policy may discourage investment in existing network infrastructure & additional investment in fibre-based, alternative customer access networks by competitors
• However, LLU is rarely used in South Asian countries or anywhere in developing world
LLU: The Case of India
• April 2004: TRAI recommends Shared Unbundling and Bit Stream Access– BSNL and MTNL (incumbents) do not support LLU, citing
complications in other countries without seeming benefits to consumers
• Jan 2008: TRAI retracts LLU ruling because of– Complexity – Possible friction among operators leading to degradation of QoS– Insufficient line capacity in the country need to provide
incentives for new roll-out
Broadband QoS regulating in Singapore
Network Availability (NA) = (Mins operational – Mins non-operational ) x 100%
Mins operational
Requirement: NA > 99% (Excluding pre-announced maintenance periods)
Bandwidth Utilisation (BU)=Peak utilisation level in each segment x 100
Total bandwidth available for that segment
Requirement: BU < 90% (average of all segments taken)If it exceeds 90% for 3 consecutive months, the provider is
directed to purchase more bandwidth. *Cannot be tested by the consumers
Regulation Singapore Vs. India
Parameter Singapore India
Network Availability > 99% > 98%
Latency (Local) < 85ms < 120 ms
Latency (Intl) < 300ms < 350 ms (terrestrial)
< 800 ms (satellite)
Bandwidth Utilisation < 90% during peak time
< 80% during peak time
Broadband Connection Speed (download)
Not Specified > 80% of specified from user to ISP
Service Activation Not Specified 100% in 15 working days
Customer Support Not Specified 60% calls in 60 sec
80% calls in 90 sec
Broadband QoS regulation in other countries
• Malaysia –Regulates QoS but not much information available
• Australia – No regulation but a manual available for consumers
• South Korea – Uses two approaches. Monitor QoS using an automated methodology and conduct user satisfaction surveys
• Bahrain – A consultation has been done, but no regulation
• UK – Conducts user satisfaction surveys. Customers were queried on quality and it was concluded that 90% were satisfied with quality (speeds) of broadband. Satisfaction with narrowband at 60%.
Mobitel HSPA (1M/384k) Download
Mobitel HSPA (1M/384k) Upload
2 Mbps
512 kbps
Upload and download (ISP domain)
2 Mbps
512 kbps
Upload and download (Local domain)
2 Mbps
512 kbps
Upload and download (ISP domain)
What ‘broadband’ means
Source: www.marketclarity.com.au quoted by TRAI
* Note: Only for illustration purposes; the data may be outdated.