doc.: ieee 802.11-06/0898r0 submission july 2006 scott s. lee, samsungslide 1...

July 2006

Scott S. Lee, Samsung

Slide 1

doc.: IEEE 802.11-06/0898r0

Submission

Name Company Address Phone EmailScott S. LeeChil-Youl YangSukjin YunEric K. ChoSeyoung ShinSung-Chul Park

Samsung Electronics Suwon, Korea +82-31-200-8779+82-31-200-9328+82-31-200-3419+82-31-200-9179+32-31-200-3847+82-31-200-9252

[email protected]@[email protected]@[email protected]@samsung.com

Rakesh TaoriSung-Won LeeHongkyu Jeong

Samsung Advanced Institute of Technology

Yongin, Korea +82-31-280-9635+82-31-280-9628+82-31-280-9549

[email protected]@[email protected]

Chiu NgoHuai-Rong Shao

Samsung Information System America

San Jose, CA +1-408-544-5633 [email protected]@samsung.com

Authors:

802.11 Amendments to Support CE Applications:Technical Requirements

Date: 2006-07-09

Notice: This document has been prepared to assist IEEE 802.11. 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 802.11.

Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, 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 <[email protected]> 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 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <[email protected]>.

July 2006


Slide 2

doc.: IEEE 802.11-06/0898r0

Submission

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, and hooks for DRM support.

July 2006


Slide 3

doc.: IEEE 802.11-06/0898r0

Submission

Wireless Connectivity

Overview

• Trends of CE devices

• WLAN CE applications

• Technical requirements

• Conclusion

July 2006


Slide 4

doc.: IEEE 802.11-06/0898r0

Submission

Trends of CE Devices

• More and more CE devices become to support wireless connectivity.

• Network-enabled and application-specific– Simplified or even no 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 computing power but still limited– Not general-purpose machines– Equipped with only minimal computing power

July 2006


Slide 5

doc.: IEEE 802.11-06/0898r0

Submission

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 cameraCamcorder

DVD/BD playerSTB (Cable TV access)

DTV

Wireless AP(Internet gateway)

PMP

Laptop PC

July 2006


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doc.: IEEE 802.11-06/0898r0

Submission


• 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 cameraCamcorder

PMP

DVD/BD player

Projector


July 2006


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doc.: IEEE 802.11-06/0898r0

Submission


Topology

InfrastructureCable set-top Network coordination with conventional AV set-top box

IP set-top IP gateway-centric network management environment

Ad hocPoint-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 communicationEx) Simple AV streaming or data communication btw. devices

Broadcast / Multicast 1-to-many communicationEx) Servicing the same AV to multiple devices simultaneously

Data type

Best-effort Legacy packets of data networksEx) Control signals btw. CE devices

MultimediaCompressed Encoded AV streams with time latency of codec

Ex) AV streaming btw. STB and TV

Uncompressed Raw AV data without codecEx) 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

July 2006


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doc.: IEEE 802.11-06/0898r0

Submission

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 PC

AP


Home PC

PMP

PMP

Laptop PC

PMP

July 2006


Slide 9

doc.: IEEE 802.11-06/0898r0

Submission

AV Jukebox

Wireless Cafeteria Wireless 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.

July 2006


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doc.: IEEE 802.11-06/0898r0

Submission

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.

AP



DTV

“One” “Two” “Three”

July 2006


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doc.: IEEE 802.11-06/0898r0

Submission

Home Theater

Video out

Audio out

tBtC

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.

July 2006


Slide 12

doc.: IEEE 802.11-06/0898r0

Submission

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

July 2006


Slide 13

doc.: IEEE 802.11-06/0898r0

Submission

Pay-per-view Service

DVD R/W player

DTV

Cable STB (AP)

PMP

Home theater

Living room Room 1

Room 2

Copy OnceCopy No more

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.”

July 2006


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doc.: IEEE 802.11-06/0898r0

Submission

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.

• Hooks for DRM– Digital content providers supply customers with their contents without

any concerns of illegal copy issues.

July 2006


Slide 15

doc.: IEEE 802.11-06/0898r0

Submission

Conclusion

• To support well-recognized CE applications using WLAN, the following requirements emerge:– Reliable multicast and broadcast

– Time synchronization

– Hooks for DRM

• We support the creation of a new Study Group to assess how the above requirements can be addressed.

doc.: ieee 802.11-06/0898r0 submission july 2006 scott s. lee, samsungslide 1...

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