doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 1 NameCompanyAddressPhone Scott S. Lee Chil-Youl Yang Sukjin Yun Eric K. Cho Seyoung Shin Sung-Chul Park Rakesh Taori Sung-Won Lee Hongkyu Jeong Chiu Ngo Huai-Rong Shao Harkirat Singh Samsung Authors: Amendments to Support CE Applications: Technical Requirements Date: Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 2 Abstract This submission presents technical requirements that should be met in order to support reliable transmission of high quality audio and video contents over WLAN. These requirements, which are derived from use cases that are well recognized in a CE context, include reliable delivery of broadcast and multicast frames, time synchronization, DRM support, device/connection control, and media stream mapping.

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 3 Wireless Connectivity Overview Trends of CE devices WLAN CE applications Technical requirements Conclusions

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 4 Trends of CE Devices More and more CE devices become to support wireless connectivity. Network-enabled and application-specific –Simplified network layers –Network functions only required by specific applications Carrying broad ranges of contents –Various video and audio types of different qualities –Casting many different constraints for QoS: bandwidth, reliability, latency, etc. Growing but still limited computing power –Not general-purpose machines –Equipped with only minimal computing power

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 5 WLAN CE Applications CE devices are ready to adopt WLAN for their network connectivity. –Wireless home network environment –Portable devices with wireless connectivity Home PC Projector Game console Home theater (AV receiver) MP3 player Digital camera Camcorder DVD/BD player STB (Cable TV access) DTV Wireless AP (Internet gateway) PMP Laptop PC

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 6 WLAN CE Applications Already well recognized applications –Delivering multiple HD streams to several receivers –Displaying stored digital contents from media servers to display devices –Browsing contents in distributed devices through big screen TVs –and many more. Home PC STB (Cable TV access) DTV Wireless AP (Internet gateway) Digital camera Camcorder PMP DVD/BD player Projector Home theater (AV receiver)

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 7 WLAN CE Applications Topology Infrastructure Cable set-top Network coordination with conventional AV set-top box IP set-top IP gateway-centric network management environment Ad hoc Point-to-point One-to-one direct communication (single hop) End-to-end Delivering data over multiple intermediate nodes (multi-hop) Ex) Relaying data through participating wireless nodes Service type Unicast 1-to-1 communication Ex) Simple AV streaming or data communication btw. devices Broadcast / Multicast 1-to-many communication Ex) Servicing the same AV to multiple devices simultaneously Data type Best-effort Legacy packets of data networks Ex) Control signals btw. CE devices Multimedia Compressed Encoded AV streams with time latency of codec Ex) AV streaming btw. STB and TV Uncompressed Raw AV data without codec Ex) Streaming btw. game console and TV Examples of specific applications –Broadcasting multimedia by utilizing single reliable channel and achieving scalability –Delivering contents to multiple devices in time synchronized manner –Supporting DRM with WLAN –Supporting CE device/connection control –Mapping of media stream

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 8 Broadcasting Multimedia Target scenario –Content server broadcasts multimedia streams to many authenticated users. –Regardless of how many users receive the streams, a single WLAN channel is expected to be used. –Content server can be STB, PC, AP, or even any portable devices. –The streams must be delivered with high reliability (i.e., QoS provisioning). PMP Laptop PCAP STB (Cable TV access) Home PC PMP Laptop PC PMP

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 9 Multimedia Broadcast Service Wireless CafeteriaWireless Car Theater In the morning, Joe enjoys watching news over coffee with his girlfriend at a cafeteria. Wireless SBC Joe works for Samsung. Joe and his team members watch SBC (Samsung BroadCast) through their laptops or wireless monitors. Joe heard about new movie, ‘Superman returns.’ In the evening, at a wireless car theater, he watches the movie with his own PMP. Music Sports Drama Game

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 10 Time Synchronized Delivery Target scenario –Content server delivers AV streams to each different type of wireless devices. –The AV streams have to be synchronized to avoid the “lip sync” problem. –Audio needs to be synchronized among all speakers. AP STB (Cable TV access) Home theater (AV receiver) DTV “One” “Two” “Three”

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 11 Home Theater Video out Audio out tBtB tCtC Contents server Lee wants to enjoy HD movies with his wireless home theater system. But he feels that the picture and sound are slightly not synchronized.

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 12 DRM Support via WLAN Target scenario –In residential or public areas, WLAN is deployed in CE devices. –Through a set-top box or a hotspot, pay-per-view movies are played. –All the devices must comply with DRM policy. PMP 2 Laptop PC 3 AP Laptop PC 1 PMP 1 PMP 3 Laptop PC 2 Public area Digital media server Home PC PMP Laptop PC STB (cable TV access) Residential area DVD/BD player DTV

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 13 Pay-Per-View Service DVD R/W player DTV Cable STB (AP) PMP Home theater Living room Room 1 Room 2 Copy Once Copy No more Cynthia, Kevin’s sister, doesn’t want to bother Kevin and Heather. So, she is watching the same movie with her PMP in her bedroom. Room 1 Don, Kevin’s twin brother, is a big fan of Star Wars. Now, he is also watching it with 5.1 channel home theater system in his room. Room 2 Kevin is watching Star Wars with his girlfriend, Heather in the couch, recording the movie in a DVD. Living room Cable TV company sends Star Wars Episode 3 to Kevin’s house with DRM tag “Copy Once.”

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 14 Device/Connection Control Target scenario –Unified device capability management (various capabilities on PHY/MAC/media streams) –AV control connection need to be setup before audio/video stream transmission. –Simple and integrated user control interface through CEC-like device control (e.g., one touch play, system standby, etc.) Laptop PCAP STB (Cable TV access) Home PC PMP HDTV Camcorder Digital Camera Home Theater (AV-Receiver) Projector MP3 player

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 15 Media Stream Mapping Target scenario –Packetize application stream and map application stream packets to MAC frame –Set traffic class/priority –Enhance packet transmission reliability MPEG2 Packetized Video Elementary Stream MPEG2 Packetized Audio Elementary Stream Other data MPEG2 Packetized Transport Stream Media Stream Mapping MAC frame …

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 16 Technical Requirements Reliable multicast and broadcast –Sharing scarce wireless channels for the same contents (i.e., scalability) –Creating many new service models (e.g., screen-less theater) Time synchronization –Low-end devices can be provided with synchronization support from WLAN. –If every data frame carries timing information, it can be processed at the right time. DRM support –Digital content providers supply customers with their contents without any concerns of illegal copy issues. Device/Connection control –Unified device/connection control for WLAN A/V applications Media stream mapping –Interface between MAC and media streams to satisfy QoS requirement

doc.: IEEE /0898r2 Submission July 2006 Scott S. Lee et al., SamsungSlide 17 Conclusions To support well-recognized CE applications using WLAN, the following requirements emerge: –Reliable multicast and broadcast –Time synchronization –DRM support –Device/Connection control support –Media stream mapping –Etc. We support the creation of a new Study Group to assess how the above requirements can be addressed.