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Link Characteristic Information for Mobile IPTV QoS Support Soohong Daniel Park, Standard Architect Digital Media R&D Center, Samsung Electronics Blog: http://blog.naver.com/natpt/ Email: firstname.lastname@example.org Outlook on Mobile IPTV - Definition
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Soohong Daniel Park, Standard Architect
Digital Media R&D Center, Samsung Electronics
Mobile IPTV is a technology that enables users to transmit and receive multimedia traffic including television signal, video, audio, text and graphic services through IP-based the weird and wireless networks with support for QoS/QoE, security, mobility, and interactive functions. Through Mobile IPTV, users can enjoy IPTV services anywhere and even while on the move.
(WLAN, WiMAX, Celluar)
(DMB, DVB, MediaFLO)
Access network is agnostic
Wireless network characteristics: The characteristics of a wireless network expressed in terms of current available bandwidth, packet loss and possibly other to-be-defined wireless network information parameters for a specific wireless link type e.g. WLAN, Cellular, WPAN or WMAN.
The IPTV architecture is recommended to allow the delivery of IPTV services over different access networks (e.g. cable, optical, xDSL, wireless)
The IPTV architecture is recommended to allow the delivery of IPTV services to any IPTV terminal device (e.g. mobile phone, PDA, set-top-box).
The IPTV architecture is recommended to adapt dynamically to change in wireless networks
characteristics when the service is delivered over a mobile network (e.g. bandwidth, packet loss rate, etc. How to deal with others characteristics such as device capacity (CPU, MEM, Screen Size, etc…) ?
The IPTV architecture is recommended to support device mobility that allows a mobile device to maintain its ongoing IPTV services while freely moving around.
The IPTV architecture is recommended to support content delivery in several yet optional versions to be selected according to the capabilities of the IPTV terminal device receiving the content (e.g. access rate, resolution, supported formats, etc.). Media server operation
The IPTV architecture is recommended to support the ability to identify wireless network
characteristics information sent by the IPTV Terminal. Bandwidth and Speed Header ?
The mobile IPTV terminal device is recommended to support service continuity.
The mobile IPTV terminal device is recommended to be able to extract its own wireless network characteristics from the current wireless network. Out of scope of RTSP ?
In case an IPTV TD is mobile, it is recommended to support mobility functionalities for service continuity when in motion.
An optional signaling architecture for exchanging wireless network characteristics between an IPTV TD (mobile device) and DNG (or Service Provider Server). It allows DNG (or Service Provider Server) to adjust their sending rate for ongoing video service according to the received information (e.g., bandwidth, packet loss, etc.) from the IPTV TD. Piggybacking the information on the existing IP based Protocol is available.
R: Requested rate value (bytes/second) in QS Response Option
rtt: measured RTT (second)
MSS: maximun segment size (bytes)
H: estimated TCP/IP header size (bytes)
QS Request Option (desired initial sending rate)
Case1: N/A => discard
QS Response Option (acceptable sending rate)
Mobile IPTV QoS Support
Utilizing the wireless link characteristic by TCP
Allowing end nodes to quickly adjust its sending data rate for ongoing connections according to the reported bottleneck link bandwidth information by IP Mobility signaling (increasing or decreasing)
Carrying the link characteristic information while performing its handover procedure (accurate timing)
Why QA not QS :
Subtype Link Type
0 LAN (802.3)
1 WLAN (802.11b)
2 WLAN (802.11a)
3 WLAN (802.11g)
4 WLAN (802.11n)
5-15 Reserved for (W)LAN Extensions
19-31 Reserved for Cellular Networks
32-47 802.15 Family Networks
48-63 802.16 Family Networks
link-info = link-info-data
link-info =/ link-info-data "," 1*info-label
link-info =/ 1*info-label "," link-info-data
link-info-data = "bw=" 1*DIGIT
bandwidth = "kbps" / "Mbps" / "kB"
info-label = ALPHA / DIGIT
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
| Option Type | Option Length | Subtype | Reserved |
| Link Characteristic Information...