Broadband Quality of Service
-- China case study
Meimei Dang
China Academy of Information and
Communications Technology, CAICT, China
2015-10-28
Outline
1
QoS fundamentals
2
Broadbandservicequalityregulation
3
Relevantstandardsandmeasurements
4
NewservicepracticeinChina
2
QoS Architecture of IP network
• ITU-TY.1540IPpackettransferandavailabilityperformance
parameters
• ITU-TY.1541NetworkperformanceobjectivesforIP-based
services
China Standard
YD/T 1703-2007
Carrier-classIP
QoS Architecture
3
Broadband QoS Metrics
 Downloadthroughput
 Uploadthroughput
 Delay/Latency
 Delayvariation (Jitter)
 Packetloss
4
QoS requirements for different services
Service Type
Throughput
Delay
Jitter
Packet
Loss Rate
5
QoS of PON network
•
•
VLANsupport
GPON:GEM/T-CONT
6
QoS Classes in LTE networks
QCI
Resource
Type
Priority
Level
Packet
Delay
Budget
Packet
Error Loss
Rate
2
100 ms
4
150 ms
10-2
10-3
3
3
50 ms
4
5
300 ms
65
0.7
75 ms
66
2
100 ms
5
1
100 ms
6
300 ms
7
7
100 ms
8
8
300 ms
9
69
9
0.5
60 ms
5.5
200 ms
1
2
6
GBR
Non-GBR
70
Reference:3GPPTS23.203
10-3
10-6
10-2
10-2
10-6
10-6
10-3
10-6
10-6
10-6
7
Outline
1
QoS fundamentals
2
Broadband service quality regulation
3
Relevantstandardsandmeasurements
4
NewservicepracticeinChina
8
Strategy and Policy
State Council: Broadband
China strategy and
implementation plan
2006
2013.08
State Council: Guidance on
accelerating broadband
network construction
2013.02
2014.02
2015.02
MIIT: Broadband
China Action Plan
2006
2015.05
2015.10
State Council: Set up
broadband telecom
universal services
compensation mechanism
9
Fixed broadband development
 FTTH coverage Households covered by FTTH
 Number of broadband users
固定宽带用户数（万户）
Fixed broadband
users（Unit: ten
thousand )
18900
20810
15000
10398
6641
2007
2009
2011
2013
2015.7
10
Mobile Broadband 4G
base
station
1,438,000
2 times
4G
user
733,000
2.6 times
250
97
（Unit:
million)
2014
2015.7
2014
2015.7
 China has built the world's largest 4G network within a year In 2009.01, 3G licenses was issued.
In 2013.12，the first LTE license was issued to China Mobile.
11
Regulatory Specification
• OnJuly12th,2013,theMinistryofIndustry
andInformationTechnology(MIIT)released
Internet access service specifications – ItistoregulatetheInternetandbroadbandaccessservices
effectiveasofSeptember1st,2013.
– ThespecificationappliestotheInternetaccessservice
stipulatedinthecontractsorserviceagreementsexecuted
betweenoperatorsandusers.
12
Section 1: Service Quality Requirements
1.Servicepre-admissionTime
– theaverageshouldbewithin2workingdays,the
maximumiswithin5workingdays.
13
Section 1: Service Quality Requirements
2.ServiceProvision/ActivationTime
Networkinfrastructureavailable
theaverageshouldbewithin5workingdays,allwork
mustbedonewithin7workingdays.
Networkinfrastructureunavailable
– Urbanareas:theaverageshouldbewithin10workingdays,
allworkmustbedonewithin16workingdays.
– Ruralareas:theaverageshouldbewithin15workingdays,
allworkmustbedonewithin20workingdays.
14
Section 1: Service Quality Requirements
3.FaultRepairandRestorationTime
– Urbanareas:theaverageshouldbewithin24hours，
thelongesttimeshouldlessthan48hours.
– Ruralareas:theaverageshouldbewithin36hours，
thelongesttimeshouldlessthan72hours.
4.ServiceChangeTime
– theaverageshouldbewithin12hours，thelongest
timeshouldlessthan24hours.
15
Section 1: Service Quality Requirements
5.BillingRawDataKeepingTime
– Serviceprovidersshouldprovidebillingdetailsupon
requestofcustomer,includingvoice,messaging,anddata
usage.
– Allbillingrawdatashouldbekeptatleastfor5months.
6.Usagereminder
– Serviceprovidersshouldnotifycustomersduringeach
billingcyclewhentheirserviceusageiscloseto,orreach,
orexceedtheirplanlimits.
– Thenotificationcanbeinseveraldifferentways,suchas
message,voice,andwebsite.
16
Section 2: Telecommunication Quality Requirements
1.Connectionsuccessfulrate(wiredaccess)

≥98%
2. Averageauthenticationresponsetime(
wiredaccess)

≤8seconds
17
Section 2: Telecommunication Quality Requirements
3.Broadbandconnectionspeedachieved
(wiredaccess)
 Averagedownloadspeedasa
percentageofadvertisedspeed,should
notlessthan90%
18
Section 2: Telecommunication Quality Requirements
4.Serviceavailability(wirelessaccess)
 Greaterthan99%ofthetime,within90%
coverage,thewirelessnetworkshallbeavailable
tothesubscribers.
5.Connectionsuccessfulrate(wirelessaccess)

≥95%
6.Averageauthenticationresponsetime(wireless
access)
 ≤8seconds
19
Section 2: Telecommunication Quality Requirements
7.Serviceinterruptionratio(wirelessaccess)
 ≤5％
8.Billingperformance
 Billinginaccuracyofinternetaccessshould≤10-4
 Billinginaccuracy(errorrate)=Inaccuratebillingrecord/
Totalbillingrecord
20
Outline
1
QoS fundamentals
2
Broadbandservicequalityregulation
3
Relevant standards and measurements
4
NewservicepracticeinChina
21
BB Performance Requirements
 YD/T2400-2012Testmethodsforbroadband
network-- fixedbroadbandaccess
Fixed BB
 YD/T2691-2014Testmethodsforbroadband
network– fixeduserexperience
Mobile BB
 YD/T2690-2014Testmethodsforbroadband
network-- mobilebroadbandaccess
 YD/T2892-2015Testmethodsforbroadband
network– mobileuserexperience
22
Test Method
-- Fixed BB access
 Fixedbroadbanddownloadaccessspeed
(YD/T2400-2012)
-- toletcustomersknowwhatbroadband
speedtheyactuallyhave.
23
Access Speed Conformity
•
•
AccessSpeedConformityispercentageratioofdownload
accessspeedtoadvertisedspeed.
TestingresultofChinaTelecom，ChinaMobileandChina
Unicomusers(2015Q2).
140.00%
Average 112.55%
120.00%
114.93%
116.05%
113.79%
111.30%
112.15%
111.83%
1M
2M
4M
8M
10M
20M
100.00%
80.00%
60.00%
40.00%
20.00%
0.00%
24
Test Method
-- Fixed BB end-to-end experience
• End-toendperformance-- userexperience
(YD/T2691-2014)
25
Fixed broadband network experience
-- file download speed -- In 2015Q2, China’s average download speed for fixed broadband
networks reached 6.11 Mbit/s.
-- Our analysis is based on both passive test and active test data.
Mbps
7.00
6.11
6.00
7.00
5.12
5.00
4.00
3.71
4.03
4.09
6.26
6.00
4.25
5.96
5.91
Average 6.11
5.00
4.00
3.00
3.00
2.00
2.00
1.00
1.00
0.00
0.00
2014Q1
2014Q2
2014Q3
2014Q4
2015Q1
2015Q2
东部
Eastern
中部
Central
西部
Western
Source：China Broadband Development Alliance
26
Fixed broadband network experience
-- first screen load time
In 2015Q2, China’s average first webpage screen load time is 2.04s.
3.00
2.50
2.31
2.37
2.31
2.37
2.17
2.04
2.00
1.50
1.00
0.50
0.00
2014Q1
2014Q2
2014Q3
2014Q4
2015Q1
2015Q2
Source：China BDA
27
Fixed broadband network experience
-- video download speed  In 2015Q2, China’s average video download speed for fixed
broadband networks reached 5.98Mbit/s.
 Among all provinces, municipalities
and autonomous regions , Shanghai,
Shandong, Beijing, Tianjin, Jiangsu
ranked Top 5.
8.00
7.00
5.98
6.00
4.77
5.00
3.89
4.00
3.00
4.01
2.20
2.00
1.00
Shanghai
7.49 Mbps
Shandong
6.85 Mbps
Beijing
6.40 Mbps
Tianjin
6.34 Mbps
Jiangsu
6.29 Mbps
0.00
2014Q1
2014Q3
2014Q4
2015Q1
2015Q2
Source：China BDA
28
Test Method
-- Mobile BB end-to-end experience
• End-toenddownloadspeed-- user
experience(YD/T2892-2015)
29
Indices of Mobile BB end-to-end experience
BulkDownloadService
• downloadspeed
• downloadsuccessful
ratio
HighQoE Service
• Bufferingtime
• videointerruption
• requestsuccessful
ratio
BulkUploadService
• uploadspeed
• uploadsuccessfulratio
SmallDataTransfer
• Latency
• requestsuccessful
ratio
30
Mobile BB experience measurement
Specific speed test APP
A
•
•
user initiated test
data transmitted by the app will be
counted as part of user’s overall data
usage.
Current APP upgrade
B
•
•
•
embedded with speed test function
no additional data consumption
gathering mass data
31
Outline
1
QoS fundamentals
2
Broadbandservicequalityregulation
3
Relevantstandardsandmeasurements
4
New service practice in China
32
4K IPTV service • InDec.2014,ChinaTelecomSichuan
launchedacommercial4Kultra-HDiTV
service.
• Itisthefirstcommercial4Knetworkservice
inChina.
33
Network architecture
34
Bandwidth requirement
35
Measures to ensure QoE
• Endtoendsolutiontoguaranteesmooth
experienceof4Kvideo.
• Smartaccelerationofspeed
36
KQIs and QoE
Web Browsing Service
First screen load time
Video Service
Average download speed
•
First page load time
Interruption ratio
First page download
speed
Buffering time
First page successful
ratio
•
QoE is calculated from KQI
indexes, which is given different
weight.
Video successful ratio
Video resolution
HTTP response latency
HTTP POST rate
parameters for main services.
Buffer block jitter
DNS lookup latency
TCP connection latency
Service Providers define KQI
…
37
QoE management in era of Experience Economy
•
Customer experience
indicator (CEI) provides
an objective
measurement of
customer experience.
•
KPIs for each layer of
network, such as AN,
RAN, CN, and IP bearer
networks.
•
KPI is he data basis for
the CEI and KQI.
38
Email:
dangmeimei@caict.ac.cn
dangmeimei@ritt.cn
39