Triple-Play Service Deployment

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192 Video Service Troubleshooting: A practical example Using a JDSU HST-3000, four parameters are measured: PCR Jitter, Latency, Continuity Error, and Error Indicator Count. Latency is the IGMP latency, which defines the channel changing time not including the decoder buffer file and the decode times. Continuity error is the lost packet rate. Error Indicator count is the number of MPEG-2 TS packets received in which the bit was set indicating the encoder had a problem with the data it received. These four parameters summarize the video quality of the selected program flow (Figure 7.5). Figure 7.5 A measure of video quality of service Chapter 7: Troubleshooting Video Service in the Field Thresholds are set for each specific network. In this example, PCR jitter is excessive, and IGPM latency was marginal at one point but is now OK. Additional data can be obtained by analyzing the stream in more detail. Because each stream includes video, audio, and data (program table data) portions, packet statistics can be obtained for each stream (Figure 7.6). If PAT or PMT data is missing or not present at specific intervals, the decoder cannot function properly and picture quality can be impacted. The PAT and PMT data must be in any video flow. Error conditions exist if it is not present at intervals supported in a specific network design. Figure 7.6 MPEG-TS stream PID (Packet Identifier) detail for the video, audio, and data portions of the stream.
Chapter 7: Troubleshooting Video Service in the Field The bandwidth for the portions of a program flow is important in analyzing performance, especially in the access network. The total may be fixed, but the video portion may vary with the motion content. Figure 7.7 Detailed bandwidth analysis of the portions of a video program flow. Figure 7.8 The PID provides visibility into packet flow for both the IP and RTP flows. Much of today’s video service uses Real Time Protocol (RTP) because its use of sequence numbers and time stamps makes it possible to deliver a higher quality packet flow. Analysis at this level is very revealing. 193
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Triple-Play Service Deployment A Co
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Copyright 2007, JDS Uniphase Corpor
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Recommended test tools . . . . . .
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VoIP Service Quality . . . . . . .
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Acknowledgements The JDSU Triple-Pl
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In North America, cable operators h
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Finally, securing all these service
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2 The Vision—Reliable Triple-Play
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4 The Building Blocks Chapter 1: Th
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6 Development/ Production - Compone
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8 Chapter 1: The Vision-Reliable Tr
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10 Chapter 1: The Vision-Reliable T
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16 Triple-Play Service Delivery ove
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18 Chapter 2: Triple-Play Service D
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20 Bandwidth Chapter 2: Triple-Play
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24 Encapsulation DA Chapter 2: Trip
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26 ISP/Internet ASP & Video Headend
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36 centralized location, the abilit
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38 Deploying and Troubleshooting Fi
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40 For “brownfield” or overlaid
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42 BPON uses time division multiple
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44 Voice IP Data Video Figure 3.3 A
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46 From the splice enclosure, signa
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48 1490nm laser/ 1310nm meter OLT 1
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50 Central Office Depending on the
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52 Chapter 3: Deploying and Trouble
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58 Acceptance testing between the s
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60 Once customers have been establi
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62 When there is a physical layer f
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66 Acceptance testing is always per
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68 1490nm laser/ 1310nm meter OLT 1
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70 Recommended test tools Whether t
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74 These effects result in an easy-
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76 Another approach uses a loss tes
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78 Selective Optical Power Meters A
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82 Troubleshooting the Copper Plant
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84 Chapter 4: Troubleshooting the C
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90 Capacitive balance Another metho
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92 TDR Response (V) 7.3 3.6 Figure
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94 Loop length also can be measured
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96 Filter Technology Lower 3dB Uppe
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100 Chapter 4: Troubleshooting the
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102 TDR capabilities A time domain
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104 Bridged taps Bridged taps, or l
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112 Physical Layer Test - Foreign V
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114 Troubleshooting the Premises Wi
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118 R-Value Testing the Premises Ne
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122 Typical Symptom Fault Condition
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124 Fault Common Cause Diagnosis Go
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126 Locating and resolving coax pro
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130 Using advanced signal processin
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132 Relative Frequency % 5 4 3 2 1
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Page 156 and 157: 142 Troubleshooting Video in the He
Page 158 and 159: 144 MPEG-2 TS over RF Understanding
Page 160 and 161: 146 elementary streams (ES). Each d
Page 162 and 163: 148 Chapter 6: Troubleshooting Vide
Page 164 and 165: 150 MPEG Technology Chapter 6: Trou
Page 166 and 167: 152 MPEG Video Syntax MPEG-2 System
Page 182 and 183: 168 Interoperability and segmentati
Page 192 and 193: 178 Troubleshooting Video Service i
Page 194 and 195: 180 Figure 7.2 A schematic diagram
Page 200 and 201: 186 STB DSL Modem EPG/Multicast Inf
Page 202 and 203: 188 RTSP Latency PAUSE Latency PLAY
Page 208 and 209: 194 Standard troubleshooting steps
Page 210 and 211: 196 Dropped packets indicate a prob
Page 214 and 215: 200 Troubleshooting Voice over IP T
Page 216 and 217: 202 Control plane protocols Real Ti
Page 218 and 219: 204 Since the 64 Kbps bandwidth req
Page 220 and 221: 206 Chapter 8: Troubleshooting VoIP
Page 224 and 225: 210 Network Equipment Installation
Page 226 and 227: 212 Figure 8.5 PVA-1000 While check
Page 228 and 229: 214 Using handheld IP phone emulato
Page 230 and 231: 216 Provisioning Tests Purpose: To
Page 232 and 233: 218 Solving Voice Quality Problems
Page 236 and 237: 222 Troubleshooting High Speed Data
Page 238 and 239: 224 ATU-Cs POTS Switch DSLAM health
Page 240 and 241: 226 transmits at three bits per bau
Page 242 and 243: 228 R ate (Mbits /s ) performance o
Page 244 and 245: 230 Chapter 9: Troubleshooting High
Page 248 and 249: 234 The JDSU HST-3000 provides comp
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242 Chapter 9: Troubleshooting High
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244 Service Assurance for Triple-Pl
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246 Chapter 10: Service Assurance f
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252 b. Correlate network performanc
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254 Passive service monitoring Hard
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258 Measurable Benefits Successful
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262 PON Reflectometer Trace Analysi
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264 Theoretical Method of PON Refle
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266 Learning Acquisition Phase The
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268 Figure A.7 Reflective event dev
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270 Appendix A: PON Reflectometer T
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272 Glossary AAL5 ATM Adaptation La
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274 Glossary Block A set of 8x8 pix
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276 Glossary Digital Television A g
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278 Glossary ETR 290 ETSI recommend
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280 Glossary I/F Interface ICMP Int
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282 Glossary MGT Master Guide Table
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284 Glossary Multiplex (n) A digita
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286 Glossary PSI Program Specific I
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288 Glossary ST Stuffing Table. An
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290 Notes: Notes
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292 Notes
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Test & Measurement Regional Sales N
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Triple-Play Service Deployment

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