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CONTENT DELIVERY NETWORKS
Course: Telecom Technologies
Prepared By: - Shiv Kumar Pandey MIT School Of Telecom
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Content Outline
• Overview Content Delivery Network• Content Delivery Network architecture• Content Delivery Management• Content Delivery Network Pricing/Billing• Media Streaming services via CDN’s
• Revenue sharing model from CDN• Future Of CDN• Case Study: AKAMAI
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Content Delivery Network
• Is a collaborative collection of network element spanning the internet .
• Content are replicated over several mirrored Web Server.
Why it is done?
• To perform transparent and effective delivery of content to the end- user.
• To over come the inherent limitations of the Internet in terms of QoS.
• Improving the performance by maximizing the bandwidth, improving the accessibility.
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Generation of CDN
1st Generation :- Focused on Static or Dynamic Web Document2nd Generation :- Focused on Video-on-Demand (VoD), audio and video
streaming .
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Model of Content Delivery Network
It contains 2 parts:-1. Encoded media2. Meta data
3 Main entities in CDN systems are:-3. Content Provider4. CDN provider5. End-User
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Architectural Component of CDN
4 main component:-1. Original server2. Distribution System3. Request Routing System4. Account System
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Request Routing in CDN Environment
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Content Delivery Network Pricing/Billing
• Charging to the customer depend upon the content delivered to the end-user by their surrogate servers.
• It support an account mechanism that collect and track client usage information.
• The average cost of charging of CDN services is high• Important factor which influence in revenue generation
are:-
a) Bandwidth costb) Variation of traffic distributionc) Size of content replicated over surrogate serversd) Number of surrogate servere) Reliability and Stability of the whole system
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Pricing Model Of CDN
• Pricing Based On Aggregate Usage Charging on Monthly basis that is 50TB/month
• Percentile – Based PricingPricing based on the 95th percentile of traffic CDN periodically samples the bandwidth usage of a subscribing content provider. It then computes the 95th percentile of usage at the end of the month and charges a price per Mbps based on the 95th percentile of usage.
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INDIA
3 Network Operators :-• Aksh Optifibre Ltd.• IOL Netcom (formerly IOL Broadband Ltd. )• Time Broadband Services Group
These 3 company have invested in CDN to provide managed video and IPTV services to India’s operators
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Akamai Technologies• Leader in providing a secure, outsourced e-business infrastructure services and software.• Covers 85% of the market. 20,000 servers in nearly 1,000 networks in 71 countries. It handles 20% of total Internet
traffic today.• Developed a set of breakthrough algorithms for intelligently routing and replicating content over a large network of
distributed servers.
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CDN Service and Functionalities
• Storage and Management of content.• Distribution of content among edge servers• Cache management• Delivery of encoded media• Backup and disaster recovery solutions• Monitoring and Performance
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THANK YOU