Wireless and Mobile Chae Y Lee IPTV Wireless
Wireless and Mobile Chae Y. Lee IPTV
Wireless and Mobile Chae Y. Lee What is IPTV? Video services delivered digitally over the converged IP network Traditional broadcast service Video on demand (Vo. D) New interactive IP based offerings 2
Wireless and Mobile Chae Y. Lee IPTV launched by major service providers 3
Wireless and Mobile Chae Y. Lee IPTV subscribers 4
Wireless and Mobile Chae Y. Lee IPTV Requirements Instant, always available, and personalized service Bandwidth: Internet access, voice, and video Reliability, stability Quality of service (Qo. S) Quality of experience (Qo. E) 5
Wireless and Mobile Chae Y. Lee IPTV System Video headend captures all programming contents receives contents through satellites or fiber networks responsible for encoding video streams into MPEG-2 or MPEG-4 6
Wireless and Mobile Chae Y. Lee IPTV System Core network (CN) groups the encoded video streams into their respective channels needs to guarantee a high level of Qo. S 7
Wireless and Mobile Chae Y. Lee IPTV System Access network contains the BRAS and DSLAM BRAS is responsible for user policy management: authentication, subscription details DSLAM aggregates traffic from multiple end users and routed to CN 8
Wireless and Mobile Chae Y. Lee IPTV System Home network distributes the data, voice, and IPTV Bandwidth for successful IPTV service: 20 -30 Mbps (SDTV: 1. 5 Mbps, HDTV: 8 Mbps) Packet loss rate: 10 -6 End-to-end latency: 100 s ms Delay jitter: 10 s ms 9
Wireless and Mobile Chae Y. Lee IPTV System Home network distributes the data, voice, and IPTV Bandwidth for successful IPTV service: 20 -30 Mbps (SDTV: 1. 5 Mbps, HDTV: 8 Mbps) 10
Wireless and Mobile Chae Y. Lee IPTV: Multicast service Only the channels users are actively watching are forwarded along DSL or fiber connection More efficient use of bandwidth than broadcast or multiple unicast 11
Wireless and Mobile Chae Y. Lee Research: Multicast Distribution Tree Multicast distribution tree for core network routers: tree update by join or leave of access networks IGMP proxy inside the DSLAM 12
Wireless and Mobile Chae Y. Lee Research: Multicast Distribution Tree Multicast distribution tree for core network routers: 13
Wireless and Mobile Chae Y. Lee Research: Multicast Distribution Tree Shared tree: rendezvous points for 100 s of channels 14
Wireless and Mobile Chae Y. Lee Research: Channel change delay Channel surfing behavior Predictive tuning: Pre-joining channels Static join Video encoding/decoding Bandwidth 15
Wireless and Mobile Chae Y. Lee Research: Channel change delay 16
Wireless and Mobile Chae Y. Lee Research: Channel change delay Propose a solution for the network delay and decoding delay Network delay: number of pre-joining channels Decoding delay: quality of pre-joining channels 17
Wireless and Mobile Chae Y. Lee Research: Channel surfing behavior Analysis based on real service data: 150 channels, 250, 000 users Sampling channels: average 4 channels 10% users watch the first channel 10% users switch more than 6 channels More pre-joining channels as user starts to change the channel Static join: a particular channel is always available at a point in the network, i. e. , DSLAM or regional gateway 18
Wireless and Mobile Chae Y. Lee Research: Channel change delay 19
Wireless and Mobile Chae Y. Lee Research: Channel change delay Channel surfing behavior model Channel delivery method: increase predictive tuning and static join to increase hit rate Channel change delay analysis Delay analysis and bandwidth efficiency 20
Wireless and Mobile Chae Y. Lee Research: Contents recommendation service Collaborative filtering recommendation Contents based filtering recommendation 21
Wireless and Mobile Chae Y. Lee Research: IPTV in Wireless Environment IPTV service over wireless LAN IPTV service over Wimax 22
Wireless and Mobile Chae Y. Lee Beyond IPTV Platform and Infra for u-Health u-Learning u-Game Home network Contents business 23
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