1. Results of OBSS Simulations
April 2009
doc.: IEEE /0483r1
April 2009
Results of OBSS Simulations
Date:
Authors:
Alex Ashley, NDS Ltd
Alex Ashley, NDS Ltd

2. April 2009
doc.: IEEE /0483r1
April 2009
Abstract
We have performed some OBSS experiments using our simulator. Document r0 contains the video resulting from an experiment. This presentation provides information on the video file.
Alex Ashley, NDS Ltd
Alex Ashley, NDS Ltd

3. Frequent dropped packets
April 2009
doc.: IEEE /0483r1
April 2009
Video Results
Roughly 22 lost packets in 30 seconds. 1m
Frequent dropped packets
300m
No dropped packets
Alex Ashley, NDS Ltd
Alex Ashley, NDS Ltd

4. Simulation Parameters
April 2009
doc.: IEEE /0483r1
April 2009
Simulation Parameters
Home
Detached house 8m x 5.5m x 4.8m, 2 floors, 4 rooms per floor
Outer walls: 2 layers of Brick, Plaster
Inner Walls: 2 sheets drywall*
Floors: Wood, Plaster
Distance between homes varied from 300m to 1m
parameters
1 AP and 5 stations per home, randomly placed
11bg mode, European regulatory channel & power rules, no TPC
EDCA, no block ACK, no DLS
11n Channel model B + DARPA building material losses
Video
2 x 3Mbps video, streamed using unicast UDP
Full simulation from MAC upwards. At PHY, signal reception is simulated, not actual waveforms.
*AKA: gypsum board, wallboard, plasterboard, gib, rock lath, Sheetrock, gyproc
Alex Ashley, NDS Ltd
Alex Ashley, NDS Ltd

5. Media Information Encapsulation Video Audio
April 2009
Media Information
Encapsulation
“DVD style” MPEG-2 Programme Stream
6 MBits/sec
Video
MPEG-2 video, 720x480, 30 frames/second
Audio
Dolby AC-3, 48KHz sample rate, 192 KBits/sec
Alex Ashley, NDS Ltd