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Luca Rea lrea@fub.it

“High Definition IP TV tests in a ADSL2+ network“. Luca Rea lrea@fub.it. FUB activities on access. Aim: Broadband for all! Radio access: Wi-FI, WIMAX (national experimentation coordinator) xDSL investigation (limits and opportunities) Comparison xDSL, radio, fibre Experiments on xDSL

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Luca Rea lrea@fub.it

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  1. “High Definition IP TV tests in a ADSL2+ network“ Luca Rea lrea@fub.it

  2. FUB activities on access • Aim: Broadband for all! • Radio access: Wi-FI, WIMAX (national experimentation coordinator) • xDSL investigation (limits and opportunities) • Comparison xDSL, radio, fibre • Experiments on xDSL • New services on xDSL (IPTV, HDTV) • Limits xDSL vs number users, twisted pair length • FTTx-xDSL

  3. CompleteISCOM IP network testbed PON network is not included here

  4. 1280x720 720x576 1920x1080 SDTV HD Ready 576p 720p Full HD 1080i,p What is HDTV (High Definition TV) ? Codec • MPEG 2 • MPEG 4 - AVC • VC1 - VMW Bit Rate p = progressive • VoD, 8-12 Mbps VBR • Broadcast, 15-20 Mbps CBR i = interlaced

  5. ISCOM IP test-bed Access Networks Cisco 3845 Core Networks Juniper M10 PC Test Twisted pair ADSL2+ ISAM 7324 OSPF, MPLS, BGP, DiffServ

  6. IP-HDTV problems over ADSL network • High bandwidth required (>18 Mb/s) • High QoS • Congestion at user connection when the downstream ADSL bandwidth is low (<30 Mb/s) • As a consequence: • Only ADSL2+, VDSL and VDSL2 compatible with HDTV • In case of ADSL2+ packet filter is required at the edge node. • We propose a DiffServ approach to mark the IP-HDTV packets (at edge node) to guarantee the client QoS

  7. Video UDP Dati TCP DiffServ approach Packets are marked according to MPLS-DiffServ approach at edge Node. The corresponding client Edge node filters the IP-HDTV packets Without DiffServ With DiffServ HDTV High QoE is observed

  8. Conclusions • IP-HDTV is the bottleneck for ADSLx • IP-HDTV will drive fibre installation in access network • At least VDLS (VDLS2) is required • For ADSL2+ QoS technique are required

  9. Thank you Luca Rea lrea@fub.it

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