TY - GEN
T1 - Collaborative scheduling in highly dynamic environments using error inference
AU - Zhang, Qingquan
AU - Gu, Yu
AU - Gu, Lin
AU - Cao, Qing
AU - He, Tian
PY - 2011
Y1 - 2011
N2 - Energy constraint is a critical hurdle hindering the practical deployment of long-term wireless sensor network applications. Turning off (i.e., duty cycling) sensors could reduce energy consumption, however at the cost of low sensing fidelity due to sensing gaps introduced. Existing techniques have studied how to collaboratively reduce the sensing gap in space and time, however none of them provides a rigorous approach to confine sensing error within desirable bounds. In this work, we propose a collaborative scheme called CIES, based on the novel concept of error inference between collaborative sensor pairs. Within a node, we use a sensing probability bound to control tolerable sensing error. Within a neighborhood, nodes can trigger additional sensing activities of other nodes when inferred sensing error has aggregately exceed the tolerance. We conducted simulations to investigate system performance using historical soil temperature data in Wisconsin-Minnesota area. The simulation results demonstrate that the system error is confined within the specified error tolerance bounds and that a maximum of 60 percent of the energy savings can be achieved, when the CIES is compared to several fixed probability sensing schemes such as eSense. We further validated the simulation and algorithms by constructing a lab test-bench to emulate actual environment monitoring applications. The results show that our approach is effective and efficient in tracking the dramatic temperature shift in highly dynamic environments.
AB - Energy constraint is a critical hurdle hindering the practical deployment of long-term wireless sensor network applications. Turning off (i.e., duty cycling) sensors could reduce energy consumption, however at the cost of low sensing fidelity due to sensing gaps introduced. Existing techniques have studied how to collaboratively reduce the sensing gap in space and time, however none of them provides a rigorous approach to confine sensing error within desirable bounds. In this work, we propose a collaborative scheme called CIES, based on the novel concept of error inference between collaborative sensor pairs. Within a node, we use a sensing probability bound to control tolerable sensing error. Within a neighborhood, nodes can trigger additional sensing activities of other nodes when inferred sensing error has aggregately exceed the tolerance. We conducted simulations to investigate system performance using historical soil temperature data in Wisconsin-Minnesota area. The simulation results demonstrate that the system error is confined within the specified error tolerance bounds and that a maximum of 60 percent of the energy savings can be achieved, when the CIES is compared to several fixed probability sensing schemes such as eSense. We further validated the simulation and algorithms by constructing a lab test-bench to emulate actual environment monitoring applications. The results show that our approach is effective and efficient in tracking the dramatic temperature shift in highly dynamic environments.
KW - Energy constraint
KW - environment monitoring
KW - error inference
KW - sensing error
KW - wireless sensor network
UR - http://www.scopus.com/inward/record.url?scp=84862963726&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862963726&partnerID=8YFLogxK
U2 - 10.1109/MSN.2011.25
DO - 10.1109/MSN.2011.25
M3 - Conference contribution
AN - SCOPUS:84862963726
SN - 9780769546100
T3 - Proceedings - 2011 7th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2011
SP - 105
EP - 114
BT - Proceedings - 2011 7th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2011
T2 - 2011 7th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2011
Y2 - 16 December 2011 through 18 December 2011
ER -