Case Study: Resilient Backbone Design for IPTV Services
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21-02-2011, 04:15 PM


presented by:
Yuanbin Shen


.ppt   IPTV.ppt (Size: 1.33 MB / Downloads: 81)
Case Study: Resilient Backbone Design for IPTV Services
Introduction

 Nation-wide TV broadcast
 Satellite-based
 Terrestrial-based (typically over IP networks → IPTV)
 IPTV architectural design
 Integrate IPTV services with existing IP backbone
 Construct a dedicated overlay network on top of IP
 Construct a direct interconnected flat IP network
 Integrate with an existing switched optical network
What is the best architecture for supporting IPTV?
Overview of IPTV Architecture

IPTV Traffic
 Type
 Broadcast TV: realtime
 VoD download: non-realtime download to VHOs
 Realtime VoD: realtime
 Characteristics
 Uni-directional and high-bandwidth
 VoD traffic: highly variable
 Multicast for broadcast TV / unicast for VoD
Design Options
 Technology:
 layer1 (optical) v.s. layer3 (IP/MPLS)
 Topology:
 hub-and-spoke v.s. meshed
Model 1: Integrate With Existing IP Backbone
 Backbone links are shared and access links are dedicated
 Rapid deployment: using existing infrastructure
 High resource utilization: share bandwidth between applications
 Drawback: IPTV quality easily impacted by Internet traffic
Model 2: Dedicated Overlay
 Use common backbone routers to construct dedicated IPTV overlay
 Easy for performance management: links are dedicated
 Overhead to construct the overlay
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