Achieving Long-Term Surveillance in VigilNet. Tian He, Pascal Vicaire, Ting Yan, Qing Cao, Gang Zhou, Lin Gu, Liqian Luo, Radu Stoleru, John A. Stankovic, Tarek F. Abdelzaher Department of Computer Science, University of Virginia IEEE Infocom 2006. outlines. Introduction Power management
Tian He, Pascal Vicaire, Ting Yan, Qing Cao, Gang Zhou, Lin Gu, Liqian Luo, Radu Stoleru, John A. Stankovic, Tarek F. Abdelzaher
Department of Computer Science, University of Virginia
IEEE Infocom 2006
status (active, dormant)
Max Num of TripWire Base a node can remember, currently set be 5
Find min hop, if it choose the first one
The Voronoi-based tripwire partitioning is very effective
and that all nodes attach to the nearest base nodes
through the shortest path.
It is not the case that nodes with high
voltages are always selected as sentries.
The average minimum distances
between sentry-pairs is 9.57 meters
with 1.88 meters standard deviation.
communication delay < detection report < classification delay < velocity estimations delay
SSA (Sentry Service Activation) delay < velocity estimations delay
SDC↓, detection delay↓
1)To reduce the detection delay,
choose a sentry toggle period as small as possible.
2)To increase the network lifetime, select a small sentry duty cycle.
SDC delay < velocity estimations delay↓, detection prob↑
STP delay < velocity estimations delay↓, detection delay↓
STP↓, detection prob↑
TDC delay < velocity estimations delay↓, detection prob↓
a low tripwire duty cycle(TDC) increases the network lifetime, but increases the detection delay and decreases
the detection probability
TDC↓, detection delay↑
Target speed delay < velocity estimations delay↑,
it takes more time to
detect slow targets than faster ones;
a high target speed
decreases the detection delay