17.3.2009 1 IPTV a Triple Play meranie 13.3.2009 Sítě FTTx v roce 2009 ... umenie optickej komunikácie Ing.Peter Potrok, Ing. Mirek Hladký Next-Gen Converged Network —It’s all about growing bandwidth appetite— Video Bandwidth Contribution VoD VoIP & MM Wireless BC HSD Source: Various sources – IPTV ILEC/PTT 2009 VoD will dictate network cost equation Tier 1 office 720 Gbps 2009 74% VoD Bandwidth • >135 million digital video subscribers by 2009, ~42% CAGR * • Ever increasing bandwidth; VOD, IPTV, HDTV, Internet video • MSO led, LEC/PTT, Content Providers emerging • New revenue streams; targeted advertising, personalized content Residential Mobile Broadband • Increased bandwidth driven by new mobile multimedia and video applications • Enabled by advanced 3G (EVDO, HSDPA) and 4G (WiMAX ,LTE) wireless • 200-400% incremental backhaul bandwidth for 3G…much more for 4G • Carrier Ethernet backhaul market alone growing ~56% CAGR (06-09)* Source: Heavy Reading Services like IPTV, DVB-H, P2P, VoD, OTT Video to Drive Bandwidth Traffic Growth
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17.3.2009
1
IPTV a Triple Play meranie13.3.2009
Sítě FTTx v roce 2009
... umenie optickej komunikácie
Ing.Peter Potrok, Ing. Mirek Hladký
Next-Gen Converged Network —It’s all about growing bandwidth appetite—
Video Bandwidth Contribution
VoD
VoIP & MM
Wireless
BC
HSD
Source: Various sources – IPTV ILEC/PTT 2009
VoD will dictate network cost equation
Tier 1 office720 Gbps 2009
74% VoD
Bandwidth
• >135 million digital video subscribers by 2009, ~42% CAGR*
• Ever increasing bandwidth; VOD, IPTV, HDTV, Internet video
• MSO led, LEC/PTT, Content Providers emerging
• New revenue streams; targeted advertising, personalized content
Residential Mobile Broadband• Increased bandwidth driven by new mobile
multimedia and video applications
• Enabled by advanced 3G (EVDO, HSDPA) and 4G (WiMAX ,LTE) wireless
• 200-400% incremental backhaul bandwidth for 3G…much more for 4G
• Aggregation & Last Mile ~25% ~20 to 25%• Miss provisioning• IGMP performance• Policy management
• Network Transition & VoIP/ISP Peering ~10% ~10%• Signaling• VOD service capacity / availability• Local channel feed errors
• Transport Layer ~10% ~20 to 25%• Packet loss• Error correction performance• Miss-provisioning
• Video Head End ~5 to 10% ~10 to 15%• Poor content quality• PCR jitter• PID mappings errors• Lip synch problems
Where do IPTV Problems Come From?
2007 2010% of problems
Limited Performance Tolerance
Type Latency Jitter Duration PL Tolerance PLR (1 hr)
SD MPEG-2 < 200 ms < 50 ms < 16 ms 7 packets 1 error event/hour 5.46 x 10 -6
SD MPEG-4 < 200 ms < 50 ms < 16 ms 5 packets 1 error event/hour 7.31 x 10 -6
HD MPEG-2 < 200 ms < 50 ms < 16 ms 24
packets
1 error event/ 4 hours 1.17 x 10 -6
HD MPEG-4 < 200 ms < 50 ms < 16 ms 14
packets
1 error event/ 4 hours 1.28 x 10 -6
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.
Testing IPTV and Why ?Every network element in a network will contribute to some extent to packet loss, packet jitter and latency
Testing the network before you roll out an IPTV will help isolate problems in the network that will affect picture quality
Monitoring IPTV once the service is rolled out will ensure viewing quality is maintained
Jitter Effect Packet Loss Effect Out-of-order Effect
.
Testing IPTV and Why ?
IPTV is unlike any other service on the network
IPTV requires the most bandwidth
IPTV is very sensitive to packet loss
Typically, IPTV uses UDP/IP encapsulation which does not allow for packet re-transmission
IPTV is sensitive to latency and packet jitter
Traffic Type
Transport Bandwidth Reqmts
Latency Reqmts
Jitter Reqmts
Packet Loss
Packet Sizes
Priority
Data TCP Bursty Resilient Resilient Resilient Variable Low
Voice UDP Low Low Lowest Medium Small High
Video UDP Highest Low Low Lowest Large High
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Packet lossPacket loss
Packet Loss and Picture Quality
Effect of Slow Channel Leave Time
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Typical Factors that Affect -Video Quality
Encoding and compression
Jitter
Latency
Bandwidth
Packet loss
Customer premises issues
FTB-8510B AXS-6xx
EXFO is focusing its IPTV testing strategy in both thetransport and access layer of the IPTV service delivery chain
Media Delivery Index (RFC4445)– MDI (RFC 4445)
• Provides users with a tool to measure and diagnose network induced impairments for IPTV streaming media
• It is comprised of two distinct measurements:
– Delay Factor (DF) and Media Loss Rate (MLR)
• Measurements serving as indicators of problems in the network that can be proactively addressed before it becomes a service affecting issue
• One of the key benefits - does not perform any type of stream decoding to achieve its metrics and therefore it does not require significant real-time processing power.
• MDI uses packet level metrics so it can be used to validate network equipment such as switches and routers
– These network elements play a key role in determining whether a packet is delayed or dropped
MDI Advantages
Only video standard (RFC4445) Scalable Relates directly to network video impairments Direct correlation to QoE Works with encrypted payloads
Supports MPEG-4, Windows Media 9 / VC-1 Not CODEC dependant Can be used with variable bit rate streams Provides real-time video quality metrics Can be used to estimate network buffers
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IPTV Functional Overview AXS-6xx•Stream Information