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Telecommunications Industry Association TR-30.3/07-04-003

Telecommunications Industry Association TR-30.3/07-04-003. ITU-T G.1050/TIA-921 IP Network Model Overview. February 22, 2007 Jack Douglass Chairman TR30.3 Director Technical Marketing Spirent Communications. Network Architecture Types of Access Links QoS controlled Edge Routing

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Telecommunications Industry Association TR-30.3/07-04-003

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  1. Telecommunications Industry Association TR-30.3/07-04-003

  2. ITU-T G.1050/TIA-921 IP Network Model Overview February 22, 2007 Jack Douglass Chairman TR30.3 Director Technical Marketing Spirent Communications

  3. 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) Occupancy (Background Traffic, Congestion, Network Load) Route Flapping Network faults Link Failures Signaling protocol issues Video Only Impairments Video coding algorithms Fixed, Variable, Capped Bit Rate Transcoding Network Impairments and Parameters that Affect Video Quality

  4. 1000BaseX 100BaseT Switch 100BaseT Hub 10BaseT WLAN (~4Mbps) ----------------- Occupancy level Packet loss 64kbps 128kbps 256kbps 384kbps 512kbps 768kbps T1/E1 T3/E3 xDSL Cable Fiber ---------------- Occupancy level Qos Edge Router ITU-T G.1050 and TIA-921 IP Network Model Core IP Network LAN A LAN B DUT B Local Access A Local Access B DUT A 64kbps 128kbps 256kbps 384kbps 512kbps 768kbps T1/E1 T3/E3 xDSL Cable Fiber ---------------- Occupancy level Qos Edge Router Route flapping Link Failures One-way delay Jitter Packet loss Packet Reorder 1000BaseX 100BaseT Switch 100BaseT Hub 10BaseT WLAN (~4Mbps) ----------------- Occupancy level Packet loss General Model for Voice, Data or Video

  5. TIA-921A (PN-3-0062RV2)New IP Network Impairment Model for IPTV Core IP Network DUT A LAN B DUT B Local Access B ADSL2 Bonded ADSL2 VDSL WiMax 3G Wireless Cable PON ---------------- Occupancy level Qos Edge Router Route flapping Link Failures One-way delay Jitter Packet loss Packet Reorder 1000BaseX 100BaseT Switch 100BaseT Hub 10BaseT WLAN (~4Mbps) ----------------- Occupancy level Packet loss New Model for IPTV

  6. ITU-T G.1050 and TIA-921 Test Profiles ITU-T Recommendation Y.1541 uses a similar approach, but there is not a one-to-one mapping.

  7. ITU-T G.1050 and TIA-921 Test Profiles based on ITU-T Y1541 Different test profiles for different Service Level Agreements (SLAs) • Profile A – Well-Managed Network Impairment Ranges • Y.1541 QoS Level – suitable for high quality video and VoIP • Most Service Providers will be supporting this SLA for IPTV

  8. ITU-T G.1050 and TIA-921 Test Profiles based on ITU-T Y1541 Different test profiles for different Service Level Agreements (SLAs) • Profile B – Partially-Managed Network Impairment Ranges • Y.1541 QoS Level – suitable for Lower quality video and VoIP

  9. ITU-T G.1050 and TIA-921 Test Profiles based on ITU-T Y1541 Different test profiles for different Service Level Agreements (SLAs) • Profile C – Un-Managed Network Impairment Ranges • Y.1541 QoS Level – Internet little or no guarantees

  10. ITU-T G.1050 and TIA-921 8 Impairment Severity Combinations Impairment Severity Combinations

  11. ITU-T G.1050 and TIA-921 LAN and Access Rates Home Rates LAN Rates for Home Locations Access Rates for Home Locations Business Rates LAN Rates for Business Locations Access Rates for Business Locations LAN and Access Rates (New Revision of Standard/Recommendation) will change as network conditions change • General – 133 LAN/Access Rate Combinations • IPTV Video – 3 LAN/Access Rate Combinations

  12. TIA-921A (PN-3-0062RV2)New LAN and Access Rates for IPTV New LAN and Access Rate for IPTV Access Rates for Home Locations applications > 3Mb/s Access Rates for Large Business Locations 10 LAN/Access Rate Combinations for IPTV

  13. Impairment Characteristics Impairment Characteristics Good Bad Route Flap Link Failure Severe • General Model – 1064 ICs, IPTV 24 ICs • New IPTV Model – 80 ICs

  14. ITU-T G.1050 and TIA-921 Example of Network Model Coverage (NMC) Curve Video Quality may also be plotted OR

  15. Example: Using G.1050/TIA-921 to Test Video Quality VLC Video Monitor Video Stream output Received Video Stream G.1050 TIA921 IP Network Impairment Emulator Video Streaming Server (VSS) Video Streaming Client (VSC) MPEG2 and H.264 Video Streams Video Quality Measurement System 131A to 133H Impairment Conditions 3 Minutes per Impairment Combination Video Quality Measurements

  16. G.1050/TIA-921 IP ImpairmentsExample Video Testing 131A 131B 131C 24 ICs 131A to 133H 131D 131E 131F 131G 131H

  17. Example Video Quality (V-Factor) – MPEG2G.1050/TIA-921 IP Impairements • MPEG Video Quality in the presence of G.1050/TIA-921 IP Impairments • MPEG2 video has a higher quality than H.264 Video under the same G.1050/TIA-921 IP Impairments

  18. Example: Video Quality (V-Factor) – H.264 G.1050/TIA-921 IP Impairements • H.264 Video Quality in the presence of G.1050/TIA-921 IP Impairments • H.264 video has a lower quality than MPEG2 Video under the same G.1050/TIA-921 IP Impairments

  19. G.1050 TIA921 IP Network Impairment Emulator Example of How to Use TIA-921/G.1050 in ETSI TS 186-008-x NGN IMS overview (from ES 282 007)

  20. Liaison with TIA-TR30.3 • Project for IP impairment for IMS/NGN • Include access characteristics in current project • Open up new project specific to IMS/NGN • TIA TR30.3 • TIA-921 • ITU-T SG-12 • G.1050

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