July 2009
doc.:IEEE 802.11-09/0838r0
Supporting Document
for TGac Evaluation Methodology
Authors:
Name
Affiliations Address
Phone
email
Minho Cheong
ETRI
+82-42-8605635
[email protected]
Peter Loc
Ralink
Technology
408 807-0868
[email protected]
Submission
138 Gajeongno, Yuseong-gu,
Daejeon, 305-700, Korea
20833 Stevens Creek Blvd, Suite
200., Cupertino CA 95014
Slide 1
Minho Cheong, ETRI and Peter Loc, Ralink
July 2009
doc.:IEEE 802.11-09/0838r0
Scenario 3 in TGac Evaluation Methodology
• In-home entertainment application with multiple flows
with varied QoS requirements including lightlycompressed video.
• This scenario is derived from scenario #1 defined in
802.11n usage model document and modified in order
to consider usage model 2a and 2b (PVR’s in
residential) defined in ‘11-09-0161-02-00ac-802.11acusage-model-document’.
Submission
Slide 2
Minho Cheong, ETRI and Peter Loc, Ralink
July 2009
doc.:IEEE 802.11-09/0838r0
Logical Link in Scenario 3 (detail)
(solid and dashed line means heavy and light traffic, respectively)
STA1
STA12
VoIP
STA7
control
MPEG2
LC
video
VoD MPEG2
control.
control
control
STA8
AP
Blu-ray
Blu-ray
video
console
STA11
video
phone
STA3
control
Internet
Blu-ray
MP3
control
VoIP
STA14
STA4
MPEG2
STA10
STA13
VoIP
Blu-ray
control
STA9
STA2
local
file transfer
console
control
STA6
STA5
video
phone
Submission
Slide 3
Minho Cheong, ETRI and Peter Loc, Ralink
July 2009
doc.:IEEE 802.11-09/0838r0
Logical Link in Scenario 3 (conceptual)
STA1
LC-video from AP
STA7
STA2
PVR to display via AP
- PVR with blu-ray quality
- PVR with MPEG2 quality
STA12
STA8
STA3
AP
STA13
STA9
STA4
Merged entertainment
- Internet-streaming video
- MP3 audio,video gaming
- control to console
Video-phone services
VoIP services
STA14
STA11
STA10
STA6
Submission
Others
- STA-to-STA file transfer
STA5
Slide 4
already defined
in 11n scenario 1
Minho Cheong, ETRI and Peter Loc, Ralink
July 2009
doc.:IEEE 802.11-09/0838r0
Service Description in Scenario 3
•
•
•
•
•
•
•
•
•
•
•
•
•
•
STA1: Lightly-compressed video from AP
STA2: Display with HD MPEG2 quality, VoD control channel
STA3: Display with Blu-ray quality, VoD control channel
STA4: Display with Blu-ray quality, VoD control channel, Internet/local File
transfer
STA5: Video Phone
STA6: Video Phone
STA7: PVR with HD MPEG2 quality
STA8: PVR with Blu-ray quality
STA9: PVR with Blu-ray quality
STA10: Internet streaming video, MP3 Audio, Video gaming, console to internet,
local file transfer
STA11: Video gaming, controller to console
STA12: VoIP phone
STA13: VoIP phone
STA14: VoIP phone
Submission
Slide 5
Minho Cheong, ETRI and Peter Loc, Ralink
July 2009
doc.:IEEE 802.11-09/0838r0
About Devices with 1-2 Antennas
• There is a proliferation of video/data traffic from small-form
factor devices with 1-2 antennas. e.g., netbooks, smart-phones,
camcorders, video-cams.
• There is need to ensure that 11ac standards proposals scales
network throughputs in the presence of such devices.
• So, need to incorporate 1-2 antenna devices in simulation
scenarios, to evaluate technology proposals.
– In scenario 3, STA7, STA8 and STA9 may be PVR devices
(such as handheld camcorders with 1-2 antennas).
– In scenario 4, some devices involved in local file transfers may
be netbooks or smartphones with 1-2 antennas. (e.g. STA11,
STA12, STA 21, STA22)
Submission
Slide 6
Minho Cheong, ETRI and Peter Loc, Ralink
July 2009
doc.:IEEE 802.11-09/0838r0
Appendix - Usage Model 2a: Lightly Compressed
Video Streaming throughout the home
Pre-Conditions:
User has operational WLAN network which includes a
TV with wireless capabilities, a PVR with wireless
capabilities, and an AP associated with the WLAN that
is not in the same room as the game machine and TV.
Application:
User can display the output of the PVR wirelessly on
the TV using a video codec like Motion 2000 JPEG that
lightly compresses video.
Environment:
Two story, three bedroom house with an AP in one
corner in the den. Other homes in the area are also
operating WLANs. Transmissions are mostly Non-LOS.
Distance between far corners of the home are ~100
feet with as many as 8 walls (and one floor) between
the video end points.
Submission
Slide 7
Traffic Conditions:
Occasional interference from other homes
because WLAN is on other channels. Data
transfers consuming up to 20% of the total
bandwidth, 2 additional video streams, and
wireless display/controllers from a video
game machine may be occurring during this
use case. Microwave may be running for up
to 5 minutes.
Use Case:
1.User looks up a program on electronic
program guide.
2.User selects a video.
3.Lightly Compressed Video is
delivered/uploaded over the wireless
network for a period of two hours.
4.User may pause video during 2 hour
period then resume watching.
5.Task is complete when user stops
watching the video.
Minho Cheong, ETRI and Peter Loc, Ralink
July 2009
doc.:IEEE 802.11-09/0838r0
Appendix - Usage Model 2b: Compressed video
streaming in a room or throughout a home
Pre-Conditions:
User has operational WLAN network which includes a
TV with wireless capabilities, a PVR with wireless
capabilities, and an AP associated with the WLAN that
is not in the same room as the game machine and TV.
Application:
User can display the output of the PVR wirelessly on
the TV using high definition compressed video with a
codec like BluRay . Expect three or four simultaneous
HD streams.
Environment:
Two story, three bedroom house with an AP in one
corner in the den. Other homes in the area are also
operating WLANs. Transmissions are mostly Non-LOS.
Distance between far corners of the home are ~100
feet with as many as 8 walls (and one floor) between
the video end points.
Submission
Submission
Slide 8
Traffic Conditions:
Severe interference from multiple streams in
the house and other homes because WLAN
is on other channels. High speed data
transfers consuming up to 20% of the total
bandwidth, many additional video streams,
and wireless display/controllers from a video
game machine may be occurring during this
use case. Microwave may be running for up
to 5 minutes.
Use Case:
1.User looks up a program on electronic
program guide.
2.User selects a video.
3.Compressed Video is delivered/uploaded
over the wireless network for a period of two
hours.
4.User may pause video during 2 hour
period then resume watching.
5.Task is complete when user stops
watching the video.
Minho Cheong, ETRI and Peter Loc, Ralink