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

−Türk Telekom Facts and Figures −Evolution of Broadband −Türk Telekom’ s Experience Agenda Türk Telekom Facts and Figures Evolution of Broadband Türk Telekom’ s Experience

THE STRUCTURE OF TURK TELEKOM GROUP Fixed Voice Subsc: 11.4 mn Total BB Connection: 7.6mn IPTv Subsc: 300 K Mobile Subsc: 16.3 mn

Consumer IP Traffic Growth ( ) Source: CiscoVNI, 2014 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 Global IP traffic has increased more than fivefold in the past 5 years, and will increase threefold over the next 5 years.

#BB Customers in Turkey Source: BTK quarter based reports km fiber length Evolution of BB In Turkey Data Usage Per User including Fixed and Mobile BB Customers

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

Time to Repair for each line: 24h Annual Availability for each line: %99.6 (35.4h outage) Regulative KPI’s KPI’s DLM NMS Fault Management System (xDSL CRM) ACS InternationalStandarts ITU-T G ETSI EG ETSI EG TR 111 Broadband KPI’s 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 MeasurementSystems

IPTv Topology

IPTv KPI’s Channel Availability per node Channel Outages per node IP Packet Loss (<= 5.85E-06 ) per node RTPSE,RTPLS KPI’s 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 InternationalStandarts KPI’s Measurement System External IPTv Probes ACS NMS Fault Management System (xDSL CRM) Umbrella Management ITU-T Y.1544 ITU-T G.1080, G.1081,G.1082 TR 126 TR 135

NGN Topology

NGN 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) Regulative Signal Analysis System External IP/SLA Probes Umbrella Management NMS InternationalStandarts ITU-T P 862 RFC 3550 RFC 6076 Measurement System KPI’s 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

IP/MPLS Topology

IP/MPLS KPI’s Time to repair (min:12h) Availability (min:%99.7) Regulative Umbrella Management System Fault Ticket System External Probe InternationalStandarts ITU-T Y.1540 ITU-T Y.1541 ITU-T Y.1560 Measurement System KPI’s Backbone delay Bacbone jitter Backbone Packet Delivery Traffic Utilizations (<%80) DNS Availability TCP Retransmissions TCP RTT TCP Quality Parameters

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!