May 2006
doc.: IEEE 802.11-06/655r0
Use Cases of WLAN for AV Streams
Scott Seongwook Lee, Huai-Rong Shao, Chilyoul Yang,
Harkirat Singh and Chiu Ngo
Samsung Electronics
May 16, 2006
Submission
Slide 1
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Overview
• Application devices
• Configuration parameters
• Application examples
• Key requisites
Submission
Slide 2
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Application Devices
Projector
Game console
MP3 player
Laptop PC
Home theater
(AV receiver)
PMP
Wireless AP
(Internet gateway)
Home PC
DTV
Camcorder
STB (Cable TV access)
•
DVD/BD player
Home appliances
–
–
–
–
Submission
Digital camera
•
No mobility
Infrastructural organization
Relatively high bandwidth traffic
Stringent QoS constraints
Personal mobile devices
–
–
–
–
Slide 3
Mobility
Ad-hoc organization
Relative low bandwidth traffic
A little QoS requirement
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Configuration Parameters
Infrastructure
Topology
Ad hoc
Service
type
Data
type
•
•
Cable set-top
Network coordination with conventional AV set-top box
IP set-top
IP gateway-centric network management environment
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
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
Best-effort
Legacy packets of data networks
Ex) Control signals btw. CE devices
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
Multimedia
Thinkable WLAN applications fall into the combinations of the above categories.
Among many different possible use cases from the combinations, some notable cases
are illustrated in the following slides.
Submission
Slide 4
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Application Examples (1)
• Typical home environment use cases
– Usually infrastructure mode
– Partially ad hoc connections (i.e., direct links)
– Tx device transmits AV streams to a dedicated Rx device.
PMP
Camcorder
Digital camera
DTV
Home PC
Wireless AP
(Internet gateway)
Projector
STB (Cable TV access) DVD/BD player
Point-to-point / Unicast / Compressed
Cable set-top or IP set-top / Unicast / Compressed
Submission
Slide 5
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Application Examples (2)
• Home environment with multiple Rx devices
– Rx devices receiving the same AV streams
– Time synchronization issues
– Same QoS level to multiple Rx devices
DTV
Home theater
(AV receiver)
Wireless AP
(Internet gateway)
STB (Cable TV access)
Projector
DVD/BD player
Cable set-top or IP set-top / Broadcast or Multicast / Compressed or Uncompressed
Submission
Slide 6
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Application Examples (3)
• Wireless gaming environment
– Small latency requirement
• Delays of codec are one of bottlenecks.
• Strong FEC mechanism is expected.
– One of the most challenging cases
Game console
DTV
Projector
Point-to-point / Unicast / Uncompressed
Submission
Slide 7
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Application Examples (4)
• Multimedia jukebox in public places
– Hotspots or jukeboxes broadcast/multicast AV streams
• QoS over broadcast/multicast channels
• Film industry-approved security level
• Pricing the public AV streams
– Personal Rx devices
• Laptop
• Personal multimedia player (PMP)
Laptop PC
Hotspot /
Jukebox
PMP
Point-to-point / Broadcast or Multicast / Compressed
Submission
Slide 8
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Application Examples (5)
• Multimedia rental services
– Rental houses
• No physical media (CDs or DVDs) required
• Film industry-approved security
– Users
• Download AV files via secured channel
• Watch movies through PMP while moving
• Watch movies through DTV at home
Laptop PC
DTV
Hotspot /
Jukebox
PMP
Projector
Cable set-top or IP set-top / Unicast / Best-effort
Point-to-point / Unicast / Compressed
Submission
Slide 9
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Application Examples (6)
• Contents sharing with home storage devices
– Sources
• Domestic distributed environment
• Contents library
– Renderers
• Contents browsing
• Display panels (TV, web pad, etc.)
• PCs (desktop, laptop, etc.)
– Both
Projector
STB (Cable TV access)
DTV
Home PC
DVD/BD player
Laptop PC
Wireless AP
(Internet gateway)
PMP
Laptop PC
Home theater
(AV receiver)
Cable set-top or IP set-top / Unicast / Best-effort
Cable set-top or IP set-top / Unicast or Broadcast or Multicast / Compressed or Uncompressed
Submission
Slide 10
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Key Requisites
• QoS (throughput, delay, jitter)
• Reliability (strong FEC for low-latency applications)
• Broadcast/Multicast
• Coverage/Range
• Portability/Mobility
• Content protection and security
• Support different kinds of media formats
• Source of media content (stored vs. live/interactive )
Submission
Slide 11
Scott Lee, et al., Samsung Electronics
May 2006
doc.: IEEE 802.11-06/655r0
Thank you!
Submission
Slide 12
Scott Lee, et al., Samsung Electronics