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iptv over ngn

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iptv over ngn

  1. 1. IPTV Over NGN Prepared By Asmaa Youssef
  2. 2. •IPTV Definition IPTV is defined as • Multimedia services: - Television / video / audio / text / graphics / data • Delivered over managed IP based networks providing appropriate - QoS / QoE, security, interactivity and reliability.
  3. 3. •IPTV Revolutionary • True interactive television. • See anything you want to see, any time, any where, on any device . • Reduced infrastructure costs. • IPTV works on your existing internet connection • Infinite number of channels .
  4. 4. •Services offered by IPTV Besides classical TV channels, IPTV provides additional interactive features: • Video on Demand (VoD). This service allows its users to order for watching any movie from the VoD server's media library. The subscriber can use the pause and rewind features. • Near Video on Demand (nVoD) Is a pay-per-view video service like VoD but intended for multiple users subscribed to nVoD service. Subscribers can look through schedule and plan watching the content of interest.
  5. 5. •Services offered by IPTV • Time Shifted TV Adds interactive features to TV channels watching. The subscriber can pause the playback at any time and resume it later. • TV on Demand (TVoD) The selected TV channels are recorded to be viewed whenever the customer finds more convenient.
  6. 6. •IPTV Roles [Domains]
  7. 7. •IPTV Roles [Domains] o Content Provider • Owner of content • Delivers contents as: Streams, Files, Tapes … o Service Provider • Provides IPTV Service • Ingests and protects IPTV content o Network Provider • Delivers streams from Service Provider to Customer o Customer • Selects and consumes content • Pay bills
  8. 8. •IPTV Functional Architecture • non-NGN IPTV : In this case IPTV services are provided by using existing protocols and network interfaces that are also used in the network for other IP-based services. This approach can be used as basis for further evolution of IPTV to NGN-based functional architectures. • NGN non-IMS IPTV : It utilizes components of the NGN framework reference architecture as identified in to support the provision of IPTV services, in conjunction with other NGN services if required. • NGN-IMS IPTV: utilizes components of the NGN architecture including the IMS component to support the provision of IPTV services in conjunction with other IMS services if required.
  9. 9. •NGN IMS IPTV Architecture
  10. 10. • Relationship between IPTV and NGN architectures
  11. 11. •IPTV Delivery Mechanisms • Unicast-Based IPTV Content Delivery In the cases where users are nomadic within the network, and when IPTV service provider is not located in the network provider domain of the end user. • Multicast-Based IPTV Content Delivery It is using delivery of IPTV packets simultaneously to multiple destinations by using transmission from a single source. ITU-T defines four different functional models for multicast-based delivery of IPTV content • Network multicast model • Cluster model • P2P model • Hybrid model
  12. 12. • Multicast-Based IPTV Content Delivery • Network multicast model In this case each instance of the end user IPTV function registers to a specific multicast group by using multicast protocol messages for joining to the group. • Cluster model Multicast capabilities provided by the service provider domain, and in particular, multicast is supported by CDF. The clusters for IPTV delivery (within the CDF) are placed in certain chosen locations.
  13. 13. • Multicast-Based IPTV Content Delivery • P2P model l is based on multicast capabilities supported and controlled by the end user equipment and its functions. In this case an end user can receive IPTV content (from other users) and distribute the IPTV content (to other peer users) at the same time. • Hybrid model Hybrid model of cluster and p2p • This model has the same characteristics as the cluster model and higher scalability due to IPTV content distribution in end users domain
  14. 14. • Flows For A content-on-demand Application
  15. 15. 1) IPTV terminal functions (ITF) connect to and interact with the application functions to select the content item that the end user wishes to receive. 2) The application functions connect to the content delivery and service control functions to establish the authority for the ITF to consume the content. 3) The application functions return the URL of the content delivery and service control functions and content item. 4) ITF connects to the content delivery and service control functions to request the delivery of the content item. 5) The content delivery and service control functions determine the location of the ITF, for example by querying the network control function. This procedure is not necessary in the case of a fixed network because the location is already known. 6) The content delivery and service control functions determine which delivery function has the requested content and can be connected to the ITF and allocate this delivery function. 7) The content delivery and service control functions request the allocation of the network resources needed to support the network path from the delivery function to the ITF. 8) The ITF issues a play request. 9) The content delivery and service control functions facilitate the content flow to the ITF. 10) At the end of the viewing session, the ITF closes the content flow. 11) The content delivery and service control functions release the delivery resources. 12) The content delivery and service control functions request the release of network resources. 13) The content delivery and service control functions confirm that the session is closed.

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