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TD 435rev1 (GEN/12) INTERNATIONAL TELECOMMUNICATION TELECOMMUNICATION STANDARDIZATION SECTOR January 18-27, 20110 English only STUDY PERIOD 2009-2012 Original: English Question(s): Q13, Q14 and Q17 Source: Title: STUDY GROUP 12 Chairman TIA TR30.3 Subcommittee Updated Liaison presentation from TIA TR30.3 concerning proposed revision of G.1050 ABSTRACT As indicated in liaison presentations to SG12 over the last 2 years, TIA TR30.3 has been working on a proposed new revision to TIA-921 (Project: PN-3-0062-RV2) and the ITU-T version of the document G.1050, Network Model for Evaluating Multimedia Transmission Performance Over the Internet Protocol. TIA TR30.3 has now completed this work and has prepared a draft of TIA-921-B for TIA ballot. TR30.3 has also prepared a harmonized draft of ITU-T G.1050 Revised. TR30.3 and submits this draft document as a liaison to the upcoming Q13/12 meetings in Geneva. We request comments and feedback during the session of the attached draft of G.1050 Revised with a goal of achieving possible consent during January session. As Chairman of TR30.3, I am submitting the proposed revision to G.1050 and electronic attachments for review and consideration by SG12 Question 13 as an update to Recommendation G.1050 at the January2011 meetings in Geneva. TIA TR-30.3 has approved submitting this document and associated materials to ITU-T SG12. This presentation provides an overview of the proposed revision of G.1050 and electronic attachments. Contacts Jack Douglass, Chairman TIA TR30.3 PacketStorm Communications Tel: +1 949-436-0663 C Email: [email protected] Chip Webb Anue System, USA Tel: +1 512-600-5403 Email: [email protected] Les Wu Alcatel-Lucent, USA Tel: +1 (908) 582-4964 Email: [email protected] Attention: This is not a publication made available to the public, but an internal ITU-T Document intended only for use by the Member States of ITU, by ITU-T Sector Members and Associates, and their respective staff and collaborators in their ITU related work. It shall not be made available to, and used by, any other persons or entities without the prior written consent of ITU-T. Proposed Revision to G1050 Network Model for Evaluating Multimedia Transmission Performance over the Internet Protocol Liaison to ITU-T SG12 – Q13, Q14, Q17 TIA TR30.3 Committee Jack Douglass, Chairman, TIA TR30.3 PacketStorm Communications January 18 to 27, 2011 Agenda o o o o o o o o o o o o o G.1050-2007 / TIA-921A Summary of Changes from G.1050 (2007) Proposed G.1050 Revision IP Network Simulation Source Code IP Network Simulation Network Models: Core, Core to LAN, LAN to LAN Impairment Combination Tables Inputs to IP Network Simulation IP Network Simulation Outputs Electronic Attachment Possible Uses for IP Network Impairment Simulation Future TIA-921/G.1050 Work Requests for SG12 Summary of Changes from G.1050 (2007) o Proposed revision to G.1050 replaces G.1050 (2007) o G.1050 (2007) Gilbert-Elliott mathematical model that fit certain observed network behavior but was not easily extended to other scenarios o Revised G.1050 – Provide more realism than the earlier version Discrete Event Simulation Models the mechanisms using that contribute to packet delay, jitter, and loss: interfering streams, queue delays in network elements, and the characteristics of specific access technologies. Greatly reduce the number of standard test cases (43 test cases) True bidirectional model Removed LOO “likelihood of occurrence” concept Impairment levels are updated to keep current with evolving IP networks Users can customize test cases to fit their specific needs ITU-T G.1050 and TIA-921 Test Profiles based on ITU-T Y1541 Different test profiles for different Service Level Agreements (SLAs) Impairment Type Units Profile A Well-Managed Range (min to max) Profile B Partially-Managed Range (min to max) Profile C Unmanaged Range (min to max) One Way Latency ms 20 to 100 (regional) 90 to 300 (intercontinental) 20 to 100 (regional) 90 to 400 (intercontinental) 20 to 500 Jitter (peak to peak) ms 0 to 50 0 to 150 0 to 500 Sequential Packet Loss ms Random loss only (except when link failure occurs) 40 to 200 40 to 10,000 Rate of Sequential Loss sec-1 Random loss only (except when link failure occurs) < 10-3 < 10-1 Random Packet Loss % 0 to 0.05 0 to 2 0 to 20 Reordered Packets % 0 to 0.001 0 to 0.01 0 to 0.1 ITU-T G.1050-2007 and TIA-921A Network Topologies DUT A LAN A LAN Rates ----------------Occupancy level Packet loss Local Access A Core IP Network Route flapping Local Access B LAN B Access Rates Link Failures Access Rates LAN Rates ---------------- One-way delay ---------------- ----------------- Occupancy level Jitter Occupancy level Occupancy level Qos Edge Router Packet loss Qos Edge Router Packet loss Packet Reorder LAN-to-LAN IP Network Model DUT A Core IP Network Route flapping Local Access B LAN B Link Failures One-way delay Access Rates LAN Rates Jitter ---------------- ----------------- Packet loss Occupancy level Occupancy level Packet Reorder Qos Edge Router Packet loss Core-to-LAN DUT B DUT B ITU-T G.1050-2007 and TIA-921A Impairment Severity Table LAN / Access Rate Tables 1344 General Model 120 Core to LAN ≤ 3 Mbit/s 48 Core to LAN > 3 Mbit/s (IPTV) IP Impairment Combinations (Delay and Loss) Proposed G.1050 Revision o G.1050 proposed update to Recommendation Proposed ITU-T G.1050 Revised Recommendation harmonized with draft of TIA-921 Ballot Request comments and feedback during the session Achieve possible consent during January session o Electronic Attachments C++ Source Code and Related Files Simulator Inputs, Outputs and Results IP Network Model Simulation Source Code o C++ Windows XP / 7: Cygwin 1.7 Linux: OpenSUSE 11.3 (i386), Fedora 9 o Other Linux and Windows Tools TCL Versions 8.4 and 8.5 Perl 5.10 GNUPlot 4.4 o Simulation environment running on PC Sample data, voice, video or audio PCAP files can be run through the model and captured the output as PCAP files for analysis and comparison o The Software Copyright Holder (Anue Systems) will grant a free license based on Option 1.3 of ITU Software Copyright Statement and Licensing Declaration – Form has been filed IP Network Model Simulation o General purpose discrete Event Simulator o Event Models simulate Network Elements Switches Routers Access Technologies Firewalls Buffers Connections via wires o Types of Events for Network Elements Packet Arrival Packet Departure Other types of events are also possible Model Basic IP Network Element Third Interferer Second Interferer Interfering Stream Generator Test Stream Input to This Stage Store and Forward Link Latency + Packet Priority Queues with Loss Test Stream Output from This Stage Disturbance Packets CORE Simulation Model 1 Gbit/s 1 Gbit/s # Switches Queue Delay Reorder Interfering Streams (pcap files) Interfering Streams (pcap files) Core Network Test Stream Test Stream CORE-to-LAN Simulation Model Interfering Streams (pcap files) Interfering Streams (pcap files) Core Network Test Stream 1 Gbit/s Access Network Test Stream LAN-to-LAN Simulation Model Interfering Streams (pcap files) Access Network 1 Gbit/s Core Network Test Stream Interfering Streams (pcap files) 1 Gbit/s Interfering Streams (pcap files) Core Network 1 Gbit/s Access Network Interfering Streams (pcap files) Test Stream Well Managed Network Well Managed Network Element Core Impairment / Interferer PCAP Avg BW (Mb/s) Number of Switches Total Core Link Delay (ms) Access Rate Down (Mbit/s) Access Rate Up (Mbit/s) Residual BER Managed Bandwidth IPTV HD Stream 1 - CBR (qty) IPTV HD Stream 2 - VBR (qty) IPTV SD Stream 1 - CBR (qty) IPTV SD Stream 2 - VBR (qty) VoIP/Fax (qty) Residual Bandwidth Peer-to-peer Rate Down Peer-to-peer Rate Up HTTP Rate Down HTTP Rate Up OTT1 Rate Down OTT1 Rate Up OTT2 Rate Down OTT2 Rate Up VoIP/Fax Rate Down VoIP/Fax Rate Down w2 3 10 Access (pick one technology) GPON Access Rate Down (Mbit/s) Access Rate Up (Mbit/s) Residual BER DSL w1 w3 w4 4 25 5 50 50 50 25 25 1.E-12 1.E-12 33 33 3 3 1.E-08 1.E-08 w5 6 75 w6 w7 w8 7 85 8 100 9 125 10 150 35 25 1.E-11 35 25 25 25 1.E-10 1.E-10 25 25 1.E-09 25 15 25 5 1.E-09 1.E-09 33 3 1.E-08 22 16 2 1 1.E-08 1.E-07 16 1 1.E-07 16 10 1 1 1.E-07 1.E-07 (QoS Voice=1 Video=2) 8 8 2 2 0.064/0.064 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 100% 100% 100% 100% 100% 100% 100% 100% 1 1 1 1 1 1 100% 100% 100% 100% 100% 100% 100% 100% QoS = 7 1.89 0.285 1.58 0.66 6.678 0.099 2.66 0.051 0.064 0.064 Partially Managed Network Partially Managed Network Element Core Impairment / Interferer PCAP Avg BW (Mb/s) Number of Switches Total Core Link Delay (ms) Access Rate Down (Mbit/s) Access Rate Up (Mbit/s) Residual BER Managed Bandwidth IPTV HD Stream 1 - CBR (qty) IPTV HD Stream 2 - VBR (qty) IPTV SD Stream 1 - CBR (qty) IPTV SD Stream 2 - VBR (qty) VoIP/Fax (qty) Residual Bandwidth Peer-to-peer Rate Down Peer-to-peer Rate Up HTTP Rate Down HTTP Rate Up OTT1 Rate Down OTT1 Rate Up OTT2 Rate Down OTT2 Rate Up VoIP/Fax Rate Down VoIP/Fax Rate Down p2 3 10 Access (pick one technology) GPON Access Rate Down (Mbit/s) Access Rate Up (Mbit/s) Residual BER DSL p1 p3 4 25 p4 5 50 p5 8 75 p6 10 100 12 200 35 35 25 35 15 25 1.E-12 1.E-12 1.E-11 15 5 5 2 1.E-09 1.E-09 15 5 1.E-09 24 18 12 3 1.5 1.5 1.E-08 1.E-07 1.E-07 6 3 1 1 1.E-06 1.E-06 6 1 1.E-06 (QoS Voice=1 Video=2) 8 8 2 2 0.064/0.064 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 50% 135% 100% 50% 25% 135% 40% 50% 20% 135% 20% 60% 25% 135% 40% 50% 100% 100% 100% 100% 100% 100% 10% 135% 10% 10% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% QoS = 7 1.89 0.285 1.58 0.66 6.678 0.099 2.66 0.051 0.064 0.064 Unmanaged & Core Network Unmanaged Network Element Core Impairment / Interferer PCAP Avg BW (Mb/s) Number of Switches Total Core Link Delay (ms) Access Rate Down (Mbit/s) Access Rate Up (Mbit/s) Residual BER Managed Bandwidth IPTV HD Stream 1 - CBR (qty) IPTV HD Stream 2 - VBR (qty) IPTV SD Stream 1 - CBR (qty) IPTV SD Stream 2 - VBR (qty) VoIP/Fax (qty) Residual Bandwidth Peer-to-peer Rate Down Peer-to-peer Rate Up HTTP Rate Down HTTP Rate Up OTT1 Rate Down OTT1 Rate Up OTT2 Rate Down OTT2 Rate Up VoIP/Fax Rate Down VoIP/Fax Rate Down u2 3 10 Access (pick one technology) GPON Access Rate Down (Mbit/s) Access Rate Up (Mbit/s) Residual BER DSL u1 4 25 u3 5 50 u4 Core u5 8 75 10 100 u6 12 200 u7 c1 15 250 3 150 35 35 25 15 5 15 5 35 15 25 5 2 5 2 1.E-12 1.E-12 1.E-11 1.E-09 1.E-09 1.E-09 1.E-09 1000 1000 1.E-12 24 18 12 6 3 6 3 3 1.5 1.5 1 1 1 1 1.E-08 1.E-07 1.E-07 1.E-06 1.E-06 1.E-06 1.E-06 1000 1000 1.E-12 (QoS Voice=1 Video=2) 8 8 2 2 0.064/0.064 10 10 10 10 10 QoS = 7 1.89 0.285 1.58 0.66 6.678 0.099 2.66 0.051 0.064 0.064 100% 100% 200% 200% 100% 100% 10% 135% 10% 10% 100% 100% 200% 200% 100% 100% 50% 135% 100% 50% 25% 135% 40% 50% 20% 135% 20% 60% 25% 135% 40% 50% 20% 135% 20% 60% 200% 200% 100% 100% 100% 100% 100% 100% 50% 50% 100% 100% 100% 100% 100% 100% 50% 50% 100% 100% 1000% 2000% 1000% 1000% 500% 500% 500% 500% 1000% 1000% Inputs to Network Simulation Network / Interferer PCAPs o Network / Interferer Traffic IPTV Video, VoIP, Over-the-Top Video, Peer-to-Peer, HTTP, FoIP Standard PCAPs or user provided PCAPs o PCAP – Packet Events drive Discrete Events Simulator Packet size Packet Timestamps o PCAP Payload Payloads if present in the PCAP are carried through the simulator. Input PCAP File Characteristics QoS PCAP File 2 HD_cbr 2 HD_vbr 2 SD_cbr 2 SD_vbr 7 OTT1_Down 7 OTT1_Up 7 OTT2_Down 7 OTT2_Up 7 P2P_Down 7 P2P_Up 7 HTTP_Down 7 HTTP_Up 7 ipfax_v34_t38_fwd 7 ipfax_v34_t38_rev 1 voip_g729_fwd 1 voip_g729_rev Data Size 275756340 196918938 274844350 197616080 119929381 1777873 110344529 2100467 34546941 5412102 27377604 1451588 53619 31376 603120 602784 Packets Duration 201282 143737 200617 144246 79619 32832 73522 36356 30000 25500 20000 15000 278 156 7180 7176 142 142 285 285 144 144 331 332 147 152 138 176 49 46 215 215 Date 05/03/10 05/03/10 05/04/10 05/04/10 12/07/09 12/07/09 09/25/10 09/25/10 09/09/09 09/09/09 12/31/69 12/31/69 10/12/09 10/12/09 01/22/10 01/22/10 Time 23:50:12 23:34:54 1:03:49 1:14:50 18:47:41 18:47:41 11:32:07 11:32:07 21:32:08 21:32:07 19:00:24 19:00:26 11:17:46 11:17:49 14:38:24 14:38:24 Avg Pkt Packet Avg Bitrate 5s peak 1s peak Description Size Rate 1370 1419 15555964 15558816 15574160 High Definition IPTV Flow, Constant Bit Rate 1370 1014 11112049 13112544 18555280 High Definition IPTV Flow, Variable Bit Rate 1370 703 7702130 7704880 7715840 Standard Definition IPTV Flow, Constant Bit Rate 1370 507 5553410 6608880 8789920 Standard Definition IPTV Flow, Variable Bit Rate 1506 554 6678690 7160352 7327760 Progressive Downloaded Over-The-Top High 54 229 99008 115257 121824 Definition Video 1501 222 2662988 12364163 13938272 Adaptively Streamed Over-the-Top Standard 58 110 50663 229643 272608 Definition Video 1152 205 1885957 3261356 3903608 Peer-to-Peer File Download and Sharing 212 168 285154 530008 703416 1369 145 1582495 2167475 4646512 Web Browser Transactions 97 85 65997 89577 193624 193 6 8809 50820 88000 Fax-over-IP 201 3 5468 45320 85600 84 33 22406 22444 22848 G.729 Voice-over-IP 84 33 22403 22444 22848 Input PCAP Files Managed Bandwidth Characteristics IPTV HD IPTV SD VoIP Input PCAP Files Residual Bandwidth Characteristics Progressive Download (OTT1) HTTP Adaptive Streaming (OTT2) Peer-to-Peer FoIP Aggregate Bandwidth Characteristics Dp Series Tests 18000000 20000000 16000000 18000000 Aggregate BW (bits/s) Aggregate BW (bits/s) Dw Series Tests 14000000 12000000 10000000 8000000 6000000 4000000 16000000 14000000 12000000 10000000 8000000 6000000 4000000 2000000 2000000 0 0 0 60 120 180 240 300 360 420 480 540 0 600 60 120 180 240 Dw1 Dw2 Dw3 Dw4 Dw5 Dw6 Dw7 Dp1 Dw8 Well Managed 360 420 480 540 600 Dp2 Dp3 Dp4 Dp5 Dp6 Partially Managed Du Series Tests Aggregate Core Bandwidth 25000000 600,000,000 20000000 500,000,000 400,000,000 15000000 bits/s Aggregate BW (bits/s) 300 sec sec 10000000 300,000,000 200,000,000 5000000 100,000,000 0 0 60 120 180 240 300 360 420 480 540 600 0 0 sec 15 30 sec Du1 Du2 Du3 Du4 Du5 Unmanaged Du6 Du7 Core 45 Simulation Outputs o Output and Result files .out (CSV) Time Series of Packet Loss and Delay Packet Delay Variation (PDV) Histogram Cumulative Distributive Functions (CDF) Summary of results o Output PCAPs Analysis of impaired packets can be performed if payload is included. .out File (CSV) Example: HDTV1 / DSL / Well Managed Network Description: Content-Encoding : Delay Unit: Set Top Box #1 IPTV Downstream ASCII ms Time Delay 5 5.028805447 5.030184825 5.031562257 5.032941634 5.034321012 5.035698444 5.037077821 5.038455253 5.03983463 5.041214008 5.04259144 5.043970817 5.045350195 5.046727626 5.048107004 5.049486381 5.050863813 5.052243191 5.053620623 Drop 27.84455091 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 27.50758121 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 0 .out File Time Series of Packet Loss and Delay Example: HDTV1 / DSL / Well Managed Network Dw1 Dw2 Dw3 Dw4 Dw5 Dw6 Dw7 Dw8 .out File PDV Histograms Example: HDTV1 / DSL / Well Managed Network Dw1 Dw2 Dw3 Dw4 Dw5 Dw6 Dw7 Dw8 .out File PDV Histograms and CDFs Example: HDTV1 / DSL / Well Managed Network Simulation Results Summary Example: HDTV1/ DSL / Well Managed Network Number of Min Packets Delay Max Delay HDTV1_Down 434003 12.50 13.97 47 Dw2 HDTV1_Down 433993 27.51 29.31 Dw3 HDTV1_Down 433970 52.52 Dw4 HDTV1_Down 433944 Dw5 HDTV1_Down 433522 Dw6 Test Case File Name Dw1 Drop Seq (Loss) Loss drop % (Loss) seq % (Loss) max-min (Jitter) 0 0.011% 0.000% 1.47 47 0 0.011% 0.000% 1.81 67.52 52 0 0.012% 0.000% 15.01 77.70 106.95 59 0 0.014% 0.000% 29.25 87.89 94.71 474 2 0.109% 0.000% 6.82 HDTV1_Down 433541 102.90 153.04 444 8 0.102% 0.002% 50.14 Dw7 HDTV1_Down 433486 127.92 178.05 481 8 0.111% 0.002% 50.14 Dw8 HDTV1_Down 433491 153.34 164.97 456 2 0.105% 0.000% 11.63 .pcap file Example: HDTV1 (Payloads Truncated) .out File (CSV) Example: SDTV2 / DSL / Well Managed Network Description: Content-Encoding : Delay Unit: Set Top Box #3 IPTV Downstream ASCII ms Time Delay 5 5.084155125 5.213908587 5.300238227 5.429842105 5.516254848 5.64598892 5.732518006 5.818867036 5.948515235 6.034911357 6.12133241 6.251094183 6.380631579 6.467027701 6.596878116 6.683282548 6.769584488 6.899157895 6.985570637 Drop 53.27604133 53.15206458 53.09975333 53.09975333 53.97893607 53.09975333 53.09975333 53.98514513 53.09975333 53.09975333 53.09975333 54.01707403 53.62069871 53.09975333 53.09975333 53.09975333 53.09975333 53.14577862 53.2229226 53.09975333 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 .out File Time Series of Packet Loss and Delay Example: SDTV2 / DSL / Partially Managed Network Dp1 Dp2 Dp3 Dp4 Dp5 Dp6 .out File PDV Example: SDTV2 / DSL / Partially Managed Network Dp1 Dp2 Dp3 Dp4 Dp5 Dp6 .out File PDV Histograms and CDFs Example: SDTV2 / DSL / Partially Managed Network Simulation Results Summary Example: SDTV2/ DSL / Partially Managed Network Number of Min Packets Delay Max Delay SDTV2_Down 110327 12.62 15.45 12 Dp2 SDTV2_Down 110207 27.78 45.76 Dp3 SDTV2_Down 110196 53.10 Dp4 SDTV2_Down 109015 Dp5 Dp6 Test Case File Name Dp1 Drop Seq (Loss) Loss drop % (Loss) seq % (Loss) max-min (Jitter) 0 0.011% 0.000% 2.83 129 0 0.117% 0.000% 17.98 119.95 134 0 0.121% 0.000% 66.85 79.05 213.13 1309 69 1.186% 0.063% 134.09 SDTV2_Down 108813 105.89 375.24 1505 168 1.364% 0.152% 269.35 SDTV2_Down 109009 204.09 338.18 1288 49 1.168% 0.044% 134.09 .pcap file Example: SDTV1 (With Payload) .out File Time Series of Packet Loss and Delay Examples: Managed Bandwidth HDTV2 HDTV1 SDTV2 SDTV1 VoIP .out File PDV Histograms Examples: Managed Bandwidth HDTV1 HDTV2 SDTV1 SDTV2 VoIP .out File Time Series of Packet Loss and Delay Examples: Residual Bandwidth OTT1 OTT2 Peer-to-Peer HTTP FoIP .out File PDV Histograms Examples: Residual Bandwidth OTT1 OTT2 Peer-to-Peer HTTP FoIP Electronic Attachment ISO 9660 format file that is downloadable from the ITU web site Part of the Recommendation Simulation Code – C++ Code G.1050 Document (PDF) Input PCAP files (without payloads) TCL files for 43 Test Case scenarios .out files Output PCAPs PNGs Results Summary (.csv) Impairment Combination Table Possible Uses for IP Network Impairment Simulation o Simulate Real-World IP network impairments PDV Histogram and Packet Loss characteristics o Test any type of IP stream(s) (PCAP) under simulated network conditions Standard Test Cases or user define simulated network conditions Test with or without payload Capture output PCAP for analysis and comparison o Test any type of IP stream using Hardware Emulation of simulated network model Standard Test Cases or user define simulated network conditions Example CORE-to-LAN Simulation QoS Test Stream(s) 2 HD VBR IPTV Interferers Bandwidth MOS Calculated from captured PCAP Interferers PDV & Loss QoS 1 VoIP Down 2 HD CBR IPTV 2 SD VBR IPTV 7 HTTP 7 OTT1 7 OTT2 Interfering Stream(s) Example MOS Calculation Derived from Simulation Output PCAP Simulation Output PCAP Description: Content-Encoding : Delay Unit: Dw4-HDTV1 ASCII ms Time Delay 21.33439 21.33571 21.33703 21.33835 21.33967 21.34099 21.34363 21.34363 21.34495 77.69556 77.69556 78.00174 77.69556 77.69556 77.69556 77.69556 77.69556 77.69556 Drop 0 0 0 0 0 0 1 0 0 Simulation .out Packet Delay and Loss Characteristic can be used to cause impairments on test streams Video Stream Analysis: ============================================= Stream source: 192.168.69.110:49713 Stream destination: 234.5.6.101:2345 Stream duration: 00:09:59.936 Stream CODEC: H.264 Stream transport: RTP (SSRC=0x11223344) Stream transport: MP2TS (PID=481, Ctrl=0x0000) Packet counts: received 2469009 lost 649 (0.00026) discarded 819 (0.00032) out-of-seq 6 (0.00000) duplicate 0 (0.00000) corrected 0 (0.00000) MOS-V (min/avg/max/inst): MOS-AV (min/avg/max/inst): 2.74/3.93/4.56/3.19 2.89/3.82/4.32/3.29 Captured output PCAPs can be use to analyze and compare competing algorithms Example MOS V Plots Derived from Simulation Output PCAP MOS V (1s Intervals) for HDTV (CBR) Well Managed DLS 1 to 8 MOS V (1s Intervals) for SDTV (VBR) Partially Managed DLS 1 to 6 Hardware Emulation from IP Network Simulation Device Under Test A (Video Server) Video Stream • • • Device Under Test B (Video Client STB) Impairment Emulator (.out files) Select a standard test case that includes a technology similar to the test stream Configure the emulator with the standard .out file for the selected test case Run the test stream through the emulator, and evaluate the effect of the network impairments on the stream Video Stream Description: Content-Encoding : Delay Unit: Dw4-HDTV1 ASCII ms Time Delay 21.33439 21.33571 21.33703 21.33835 21.33967 21.34099 21.34363 21.34363 21.34495 77.69556 77.69556 78.00174 77.69556 77.69556 77.69556 77.69556 77.69556 77.69556 Drop 0 0 0 0 0 0 1 0 0 Advanced Use of the Network Model User-Defined Test Cases o Replace any of the standard interferer pcap files with user interfere pcap files o Change the traffic mix o Change network conditions number of switches bit error ratio access technology parameters, etc. Future TIA-921/G.1050 Work o Active Network Emulation using Interferer PCAP files o Add Cable Access Characteristics o Add Wireless Access Characteristics o Update as IP Network evolves Requests to SG12 o Provide comments and feedback on G.1050 Revised during session Document Simulation and Results Electronic Attachments o Consider possible Consent of G.1050 Revised during the January session