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Telecommunications Industry Association TR-30.3/05-12-043

Telecommunications Industry Association TR-30.3/05-12-043. TIA-921 (PN-3-0062) and ITU-T G.NIMM Network Model for Evaluating Multimedia Transmission Performance Over Internet Protocol. Jack Douglass, Spirent Chair TIA TR30.3 October 2005 Q13/12 D115 (TIA-921) Q13/12 D114 (G.NIMM Draft 2)

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Telecommunications Industry Association TR-30.3/05-12-043

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  1. Telecommunications Industry Association TR-30.3/05-12-043

  2. TIA-921 (PN-3-0062) and ITU-T G.NIMMNetwork Model for Evaluating Multimedia Transmission Performance Over Internet Protocol Jack Douglass, Spirent Chair TIA TR30.3 October 2005 Q13/12 D115 (TIA-921) Q13/12 D114 (G.NIMM Draft 2) Q4/9 TD168 (G.NIMM Draft 2)

  3. TIA-921 (PN-3-0062) and ITU-T G.NIMM Types of DUTs IP Phones POTS over IP Media Gateways MGC User Agents Call Agents Media Servers Video Gatekeepers Application Servers Edge Routers Gateways Modems Fax Scenario Based Time Varying IP Network Impairments Jitter, Latency, Burst Loss, Gap Loss Packet Loss, Out-of-Order Packets Route Flapping, Link Failure IP Network Impairment Emulator Based on TIA-921 and ITU-T G.NIMM

  4. TIA-921 (PN-3-0062) and ITU-T G.NIMM Network Model for Evaluating Multimedia Transmission Performance TIA-921 / ITU-T G.NIMM

  5. 1000BaseX 100BaseT Switch 100BaseT Hub 10BaseT WLAN (~4Mbps) ----------------- Occupancy level Packet loss 64kbps 128kbps 256kbps 384kbps 512kbps 768kbps T1/E1 T3/E3 ADSL Cable Fiber ---------------- Occupancy level Qos Edge Router TIA-921 and ITU-T G.NIMMIP Network Model Core IP Network LAN A LAN B DUT B Local Access A Local Access B DUT A Route flapping One-way delay Jitter Packet loss 64kbps 128kbps 256kbps 384kbps 512kbps 768kbps T1/E1 T3/E3 ADSL Cable Fiber ---------------- Occupancy level Qos Edge Router 1000BaseX 100BaseT Switch 100BaseT Hub 10BaseT WLAN (~4Mbps) ----------------- Occupancy level Packet loss

  6. Network Architecture Types of Access Links QoS controlled Edge Routing MTU Size Packet Loss (Frame Loss) Out of order packets One Way Delay (Latency) Variable Delays (Jitter) Background Traffic (Occupancy) Timing Drift Route Flapping Signaling protocol mismatches Network faults Link Failures Network Impairments and Parameters that Affect Voice and Video Quality

  7. Statistically based models for different QoS Classes TIA-921 and ITU-T G.NIMMTest Profiles Based on QoS Classes

  8. TIA-921 and ITU-T G.NIMMTest Profiles Based on QoS (Y.1541) Classes Different test profiles for different Service Level Agreements (SLAs) Profile A Well Managed Network Impairment Ranges Table 2 Profile B Best Effort Managed Network Impairment Ranges Table 3 Profile C Un-Managed Network Impairment Ranges Table 4

  9. TIA-921 and ITU-T G.NIMM 8 Impairment Severity Combinations Table 10: Impairment Severity Combinations

  10. TIA-921 and ITU-T G.NIMM LAN and Access Rates Home Rates Table 5: LAN Rates for Home Locations Table 7: Access Rates for Home Locations Business Rates Table 6: LAN Rates for Business Locations Table 8: Access Rates for Business Locations LAN and Access Rates (New Revision of Standard/Recomendation) will change as network conditions change 133 LAN/Access Rate Combinations

  11. TIA-921 and ITU-T G.NIMMStatistically Based IP Network Impairment Conditions (ICs) based on SLAs Call Quality Metric IC– 96A Probability (LOO = 0.00256%) Impairment Condition

  12. TIA-921 and ITU-T G.NIMMStatistically Based IP Network Impairment Conditions (ICs) based on SLAs Call Quality Metric IC– 96E Probability (LOO = 0.01025%) Impairment Condition

  13. TIA-921 and ITU-T G.NIMMStatistically Based IP Network Impairment Conditions (ICs) based on SLAs Call Quality Metric Route Flap IC– 96H Probability (LOO = 0.00256%) Link Failure Impairment Condition

  14. TIA-921 and ITU-T G.NIMM Example of Network Model Coverage Curve • Test Results from 1064 Statistically based IP Network Impairment Combinations. • The Network Model Coverage curves may be used to test the performance of a set of devices across a range of impairment conditions for a given quality metric. OR

  15. TIA-921 and ITU-T G.NIMM Example of Network Model Coverage Curve • Test Results from 1064 Statistically based IP Network Impairment Combinations. • The Network Model Coverage curves may be used to test the performance of a set of devices across a range of impairment conditions for a given quality metric. OR

  16. History of TR30.3 Network Model Standards • TIA/EIA 496A-1989: Interface Between Data Circuit Terminating Equipment (DCE) and the Public Switched Telephone Network • Included Network Model for Evaluating Modem Performance • TIA/EIA TSB 37A-1994:Telephone Network Transmission Model for Evaluating Analog Modem Performance, whichbecameITU-T Recommendation V.56bis-1995 • EIA/TIA TSB 38-1994:Test Procedures for Evaluation of 2-Wire 4 Kilohertz Voice Band Duplex Modems, whichbecame ITU-T Recommendation V.56ter-1996 • ANSI/TIA/EIA 3700-1999:Telephone Network Transmission Model for Evaluating Analog Modem Performance • ANSI/TIA/EIA 793 -2000:North American Telephone Network Transmission Model for Evaluating Analog Client and Digitally Connected Server Modems • ANSI/TIA 876 – 2002: North American Network Access Transmission Model for Evaluating xDSL Modem Performance

  17. TR30.3 Liaison Activities • Liaisons activities between TR30.3 and appropriate committees to develop TIA-921 (PN-3-0062), Network Model for Evaluating Multimedia Transmission Performance Over Internet Protocol • TR41.4 • TR45.5 • ITU-T SG12 • ITU-T SG9 • ITU-T SG15 • Working with Operating Companies and Service providers to provide statistically accurate IP network impairment model

  18. TIA-921 Target Audience for Network Model • Network Equipment Manufacturers • Operating Companies • Service Providers • Design Engineers • Test houses • Magazines and product reviewers

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