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SIP in Service Quality Monitoring

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June 2007

Published in: Business, Technology
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SIP in Service Quality Monitoring

  1. 1. The Role of SIP in Service Quality Monitoring Yaron Eisenstein Director, Marketing Solutions TTI Telecom © 2007
  2. 2. Service Quality Monitoring – The Bigger Picture <ul><li>Packet delay </li></ul><ul><li>Packet delay variation </li></ul><ul><li>Packet loss ratio </li></ul><ul><li>Packet error rate </li></ul>Session Success /Failure Metrics Session timers Metrics Session Timers Metrics Session Efficiency Metrics MOS CCI E-Model PESQ SIP QoS Mechanism QoS Monitoring QoS Benchmarking QoS Service Level Agreement
  3. 3. SIP Monitoring: Holistic Approach to SQM <ul><li>Understand customers’ experience </li></ul><ul><ul><li>Performance and quality indicators for evaluating different segments of service usage </li></ul></ul><ul><li>Be proactive with actionable metrics </li></ul><ul><ul><li>Identify quality impairments before customers have noticed </li></ul></ul><ul><li>SLA Monitoring </li></ul><ul><ul><li>Comparable metrics for internal and Partner SLA monitoring </li></ul></ul>Do my sessions meet quality expectations? How long does it take to connect? Why does my session keep dropping? How fast is my service restored? What performance level is my session operating at?
  4. 4. Analyzing the Performance of a SIP Session ! “ SIP timers should at least match (if not surpass) familiar traditional telephony timers “ INVITE : sip:ttib@ttil.com Calls: ttib@ttil.com INVITE : sip:ttib@18.18.2.4 100 - Trying 180 - Ringing Rings 180 - Ringing 200 - OK Answers 200 - OK ACK BYE Hangs up 200 - OK User A User B Proxy Talking Talking RTP 200 - OK REGISTER : sip:ttia@ttil.com 401 - Unauthorized REGISTER : (add credentials) Registration Request Delay (RRD) Session Request Delay (SRD) Session Disconnect Delay (SDD) Session Duration Time (SDT) Session Establishment Rate (SER)
  5. 5. SIP Monitoring Life Cycle Session Processing Metric Dimensioning & Creation Service Degradation Rules Customers Customer groups Services Service levels Domains Partners Equipment type Root-Cause Isolation
  6. 6. SIP Monitoring Life Cycle Session Processing Metric Dimensioning & Creation Service Degradation Rules Customers Customer groups Services Service levels Domains Partners Equipment type Root-Cause Isolation
  7. 7. SIP Monitoring Life Cycle Session Processing Metric Dimensioning & Creation Service Degradation Rules Customers Customer groups Services Service levels Domains Partners Equipment type Root-Cause Isolation
  8. 8. SIP Monitoring Life Cycle Session Processing Metric Dimensioning & Creation Service Degradation Rules Customers Customer groups Services Service levels Domains Partners Equipment type Root-Cause Isolation
  9. 9. SIP Monitoring Life Cycle Session Processing Metric Dimensioning & Creation Service Degradation Rules Customers Customer groups Services Service levels Domains Partners Equipment type Root-Cause Isolation
  10. 10. SIP Performance Indicators Session initiation <ul><li>Registration Request Delay (RRD) </li></ul><ul><li>Session Request Delay (SRD) </li></ul>Post-Dial Delay (PDD) <ul><li>Average hops/ INVITE (AHI) </li></ul>Session Termination <ul><li>Session Disconnect Delay (SDD) </li></ul><ul><li>Session Disconnect Failure (SDF) </li></ul>Cut-off Calls <ul><li>Session Establishment Rate (SER) </li></ul><ul><li>Answer Seizure Rate (ASR) </li></ul><ul><li>Network Efficiency Rate (NER) </li></ul><ul><li>Session Establishment Efficiency Rate (SEER) </li></ul>Session Progress <ul><li>Session Duration Time (SDT) </li></ul>Call Hold-Time (CHT) <ul><li>Ineffective Session Attempts (ISA) </li></ul><ul><li>Session Defects/ million (SPM) </li></ul><ul><li>Session Completion Rare (SCR) </li></ul><ul><li>Session Success Rate (SSR) </li></ul>Call Completion Rate <ul><li>Call Success Rate (CSR) </li></ul>Performance indicators provided for VoIP telephone calls, multimedia distribution, and multimedia conferences
  11. 11. End-to-End SIP Performance Summary <ul><ul><li>Evaluate customers’ experience </li></ul></ul><ul><ul><li>Be proactive with actionable metrics </li></ul></ul><ul><ul><li>Manage customers’ and inter-connectivity SLAs </li></ul></ul>Four phases of SIP monitoring life cycle: <ul><ul><li>Session Processing </li></ul></ul><ul><ul><li>Metric dimensioning & creation </li></ul></ul><ul><ul><li>Service degradation rules </li></ul></ul><ul><ul><li>Root-cause isolation </li></ul></ul>The Challenge Monitoring Approach Solution Benefits Implementing end-to-end Service Quality Monitoring in SIP-based networks
  12. 12. This presentation, its content, materials ideas and know-how are the property of TTI Team Telecom International Ltd. (and its affiliates together “ TTI Telecom ” ) and are designated as confidential. This presentation may not be reproduced, altered or distributed in whole or in part, without the express written permission of TTI   Telecom.   The content is provided “ As Is&quot;, and in no way imply warranty or commitment . This is a Legal Notice and may not be removed or altered in any way . Copyright © 2007 TTI Team Telecom International, Ltd. Thank you [email_address] www.tti-telecom.com

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