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Requirement of service provider for the D ata B roadcasting S ervice over the IPTV

63 rd meeting - Paris, France (July 31-August 5, 2005) . Requirement of service provider for the D ata B roadcasting S ervice over the IPTV. draft-lkchoi-mmusic-iptvdbs-req-00.txt. Lark Kwon Choi ( biorock@kt.co.kr ) Dae-Gun Kim, Sang-Soo Lee, Jin-Han Kim

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Requirement of service provider for the D ata B roadcasting S ervice over the IPTV

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  1. 63rdmeeting - Paris, France (July 31-August 5, 2005) Requirement of service provider for the Data Broadcasting Service over the IPTV draft-lkchoi-mmusic-iptvdbs-req-00.txt Lark Kwon Choi( biorock@kt.co.kr ) Dae-Gun Kim, Sang-Soo Lee, Jin-Han Kim (dkim@kt.co.kr, ssllee@kt.co.kr, jinhan@kt.co.kr)

  2. I . Introduction ( Motivation ) • Progressive convergence of IP-based communication and broadcasting Bidirectional interactive high quality services IPTV with interactive data broadcasting services (DBS) • DBS Standard • DVB-MHP, OCAP, ACAP • We are preparing the IPTV DBS service! We need the IP-based DBS standard in view of network. • Proposal : Requirements for the DBS over IPTV • Multicasting with unicasting transmission requirements • Network requirements • Receiver, Media format and security requirements

  3. II . General Requirements • Independence of DBS data transmission • Various delivery mechanisms of DBS data • Supporting of different data transmission formats according to the service scenario of service provider. • DBS interactivity of multiple accesses • Communication with any number of DBS receivers interactively and simultaneously. • Access with any other DBS subscriber in multiparty communication sessions.

  4. III . Multicasting with Unicasting Transmission • Previous DBS • Based on the unidirectional transmission. • Incomplete DBS due to limited bandwidth of uplink. Many service providers prefer multicasting transmission. Restricted contents delivery and low subscriber satisfaction • DBS over IPTV • Enough bandwidth for uplink and downlink.: IPTV is able to provide interactive DBS vividly • Multicasting and unicasting transmission simultaneously. • REQ MUL-1: IPTV DBS transmission method SHOULD be able to support multicasting and unicasting together according to its service plan • Multicasting : high simultaneity with many user request • Unicasting : low simultaneity with interactive request

  5. IV . Multicasting with Unicasting Transmission Example of DBS flow diagram Contents IP Media Platform Service in Receiver PP Multicast Media Broadcasting System Channel Service Program linked DBS Data Broadcasting System DP Program supplementary DBS Return Server CP Unicast Data Broadcasting Server Program independent DBS Figure1. DBS flow diagram Multicast Data Return Signal (Unicast) Unicast Data Multicast Media

  6. DBS System IP Network Receiver (STB) BroadcastingSystem Multicast Ch#1; AV Media + DBS program linked data IPtuner DeMux De-Corder Multicast Ch#2; AV Media + DBS program linked data ~ Multicast Ch#3; DBS program independent data ~ Multicast Ch#4; DBS program supplementary metadata Multicast Ch#4; DBS IMG & SI metadata Return Path client DB Server Unicast ; Supplementary specific data Return Server Figure2. transmission diagram IV . Multicasting with Unicasting Transmission • REQ MUL-2 • Classification of In-Band Group for the Video/ Audio program and Out-of-Band Group for IMG data. • REQ MUL-3 • IGMP multicast group join with IP network specific parameter such as IP address and port.

  7. IV . Multicasting with Unicasting Transmission • SDP (Session Description Protocol) ; RFC 2327 • IP multicast session - Multicast address for media- Transport Port for media • IP unicast session- Remote address for media- Transport port for contact address • We apply the updated SDP for the combination of multicast and unicast to the IPTV • To treat supplementary and independent DBS.  These need both transmission method simultaneously. Example> 1. news, weather, traffic situation of transportation. 2. messenger or SMS service with TV program.

  8. V . Network • Bandwidth • Prerequisite bandwidth of each DBS data for total necessary bandwidth of DBS. • Priority regeneration of DBS data stream for the quick reflection of user’s service order. • Reliability • Reliable data transmission. • Use of QoS and FEC for low packet loss with correction. • Monitoring packet loss for acceptable error rate. • Congestion control • Internet-friendly congestion control. • Control of application data lifetime.

  9. VI . Receiver, Media format and Security • Receiver • Bidirectional interaction with DBS sender. • Several multicasting channel join. • Synchronization of DBS data between receiver and server. • Media format • Supporting any media format for the flexibility of multimedia contents. • Security • Guarantee of DBS security and confidential delivery of data. • Different access according to the authorization level . • Checking access level of subscriber for the security.

  10. VIII . Next for the Standard • Is it possible to adapt this draft to the MMUSIC WG Document ?  I really want to work for the MMUSIC. • Please e-mail for the detailed discussion. biorock@kt.co.kr • Thank you very much for your attention !

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