Wireless Sensor Network Performance in Residential Environments
From REM
This is an ongoing project page.
Contents |
Papers
"Experiences with Wireless Sensor Network Performance in Residential Environments," Nate Ota
Overview
Platform/Radios: T-Mote Sky/CC2420
Nate et al. tested motes in 4 different (unoccupied?) houses, primarily measuring for packet loss. The independent variables measured were location, walls, doors open/shut. The motes were all aligned at the same height and the on-board antennas were used. The unique flavors to this test were the anaysis and characterization of packet loss events; sporadic vs. contiguous events were studied, and the link symmetry was tested as well.
Relevant Findings
- Aggregate packet loss is typically less than 10%.
- Packet loss is greater when all doors are closed.
- Packet loss events last seconds to minutes in duration.
- Packet loss events are mainly single-link,
infrequently do extend to multiple links and rooms.
- Multiple link losses are typically non-contiguous,
often occur within a continuous single-link loss event
- Asymmetry is present in 17 % of all lossy links.
- Cordless phones operating on 2.4 GHz interfere with the mote networks
Reference
Ota, N. and P. Wright, "Experiences with Wireless Sensor Network Performance in Residential Environments", ACM RealWSN '06 Workshop on Real-World Wireless Sensor Networks, Uppsala, Sweden, June 19, 2006.
"Lessons Learned in Wireless Monitoring," William M. Healy
Overview
Platform/Radios: Unnamed 902-928 MHz DSS powered @ 4ma
Sounds like some bleeding edge implementation on some special devkits w/ C-based language with some special sensors ... (still need to read through in more detail)
Relevant Findings
A whole lot of things did not work easily ... (still need to read through in more detail)
Reference
ASHRAE Journal Vol. 47, No. 10, October 2005
"Demand Response Enabling Technology Development, Phase I Report," Ed Arens et. al.
Overview
Platform/Radios: TelosB/CC2420
DR-T-stat group put over a dozen motes into an occupied ranch house in Moraga to study temperature, motion, power use, etc. as a testbed for a DR-enabled HVAC controller and learning platform. The implementation was very buggy (motes froze, the controller froze, etc.) but a lot was learned. there was a very strange occurence of some periods of missing data
Relevant Findings
- Star network in an occupied house is (barely) good enough ... with limited range
- A single high sensitivity / high power repeater is enough to operate remote low power 2.4 GHz 802.15.4 radios in a star network to get reliable communications
- Some periods of missing data not accounted for
