ITU Workshop on “Quality of Service and
Quality of Experience of Multimedia Services in
Emerging Networks”
(Istanbul, Turkey, 9-11 February 2015)
Network Performance Measurement
Methodologies in Türk Telekom
Mehmet Özdem
SLA Manager, Türk Telekom
mehmet.ozdem@turktelekom.com.tr
Agenda
Evolution of Broadband
Türk Telekom
Facts and Figures
Türk Telekom’ s
Experience
THE STRUCTURE OF TURK TELEKOM GROUP
Mobile Subsc: 16.3 mn
Fixed Voice Subsc: 11.4 mn
Total BB Connection: 7.6mn
IPTv Subsc: 300 K
Consumer IP Traffic Growth (2013-2018)
Global consumer IP traffic is expected to reach 108 exabytes per month in 2018
IP traffic is growing fastest in the Middle East and Africa
Source: CiscoVNI, 2014
Global IP traffic has increased more than fivefold in the past 5 years,
and will increase threefold over the next 5 years.
Evolution of BB In Turkey
#BB Customers in Turkey
including Fixed and Mobile BB Customers
240.000 km fiber length
Data Usage Per User
Source: BTK quarter based reports
Traffic Characterization in TT
Globally, IP video traffic will be 79 percent of all consumer Internet traffic in 2018
TT Network Topology
TT’s Experience on KPI’s Measurement
Broadband Topology
Broadband KPI’s
Regulative
KPI’s
• Time to Repair for each
line: 24h
•
•
•
• Annual Availability for each •
line: %99.6 (35.4h outage)
•
•
•
•
•
Hourly CRC Errors (<30)
DownStream Noise
Margin (>12)
Total FEC Errors (<5K) per
sec.
LossofFraming
Waiting periods in each
team (repertitor, NMS, site )
Repetitive fault rate
DSLAM / BNG Traffic
Utilizations
Current/Attainable Speeds
Measurement
Systems
• DLM
• NMS
• Fault Management System
(xDSL CRM)
• ACS
International
Standarts
• ITU-T G.997.1
• ETSI EG 202 057-1
• ETSI EG 202 057-4
• TR 111
IPTv Topology
IPTv KPI’s
KPI’s
KPI’s
• Channel Availability per node
• Channel Outages per node
• IP Packet Loss (<= 5.85E-06 )
per node
• RTPSE,RTPLS
•
•
•
•
Overruns (<0.4)
Underruns (<0.4)
I Lost Frames (<0.3)
MPEG Packet Discounter
(<0.5)
• Waiting periods in each
team (repertitor, NMS, site )
• Repetitive fault rate
• DHCP/NTP Server
Availability
Measurement
System
•
•
•
•
External IPTv Probes
ACS
NMS
Fault Management System
(xDSL CRM)
• Umbrella Management
International
Standarts
• ITU-T Y.1544
• ITU-T G.1080,
G.1081,G.1082
• TR 126
• TR 135
NGN Topology
NGN KPI’s
Regulative
KPI’s
• Call Drop Rate for National
Calls (<%1.5)
• Call Drop Rate for
International Calls (<%2.5)
• Call Setup Time for
National Calls (<3sn)
• Call Setup Time for
International Calls (<7sn)
• Delay, Jitter,MoS Values
between MGW’s and
SoftSwitches
• Availability per subscriber
(from SS-MSAN outages)
• Availability per MSAN (from
SS-MSAN outages)
• Trunk Utilizations (< %90)
• SS CPU /Memory Values
Measurement
System
• Signal Analysis System
• External IP/SLA Probes
• Umbrella Management
• NMS
International
Standarts
• ITU-T P 862
• RFC 3550
• RFC 6076
IP/MPLS Topology
IP/MPLS KPI’s
Regulative
• Time to repair (min:12h)
• Availability (min:%99.7)
KPI’s
•
•
•
•
•
•
•
•
Backbone delay
Bacbone jitter
Backbone Packet Delivery
Traffic Utilizations (<%80)
DNS Availability
TCP Retransmissions
TCP RTT
TCP Quality Parameters
Measurement
System
• Umbrella Management
System
• Fault Ticket System
• External Probe
International
Standarts
• ITU-T Y.1540
• ITU-T Y.1541
• ITU-T Y.1560
Conclusion
KPI’s need to be
clear, measurable
and trackable.
Periodic Quality
Reports
International
Standarts
(Y.1541,G1080)
Service Quality
Group
(BTK,vendors,operators, academicians)
Thank You!
mehmet.ozdem@turktelekom.com.tr