TY - GEN
T1 - You can't get there from here
T2 - 2010 IEEE 7th International Conference on Mobile Adhoc and Sensor Systems, MASS 2010
AU - Alayev, Yosef
AU - Bar-Noy, Amotz
AU - Johnson, Matthew P.
AU - Kaplan, Lance
AU - La Porta, Thomas F.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - We study a problem in which a single sensor is scheduled to observe sites periodically, motivated by applications in which the goal is to maintain up-to-date readings for all the observed sites. In the existing literature, it is typically assumed that the time for a sensor switching from one site to another is negligible. This may not be the case in applications such as camera surveillance of a border, however, in which the camera takes time to pan and tilt to refocus itself to a new geographical location. We formulate a problem with refocusing delay constraints. We prove the problem to be NP-hard and then study a special case in which refocusing is proportional to some Euclidian metric. We give a lower bound on the optimal cost for the scheduling problem. Finally, we provide and experimentally evaluate several heuristic algorithms, some of them based on this computed lower bound.
AB - We study a problem in which a single sensor is scheduled to observe sites periodically, motivated by applications in which the goal is to maintain up-to-date readings for all the observed sites. In the existing literature, it is typically assumed that the time for a sensor switching from one site to another is negligible. This may not be the case in applications such as camera surveillance of a border, however, in which the camera takes time to pan and tilt to refocus itself to a new geographical location. We formulate a problem with refocusing delay constraints. We prove the problem to be NP-hard and then study a special case in which refocusing is proportional to some Euclidian metric. We give a lower bound on the optimal cost for the scheduling problem. Finally, we provide and experimentally evaluate several heuristic algorithms, some of them based on this computed lower bound.
UR - http://www.scopus.com/inward/record.url?scp=78650994530&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650994530&partnerID=8YFLogxK
U2 - 10.1109/MASS.2010.5663929
DO - 10.1109/MASS.2010.5663929
M3 - Conference contribution
AN - SCOPUS:78650994530
SN - 9781424474882
T3 - 2010 IEEE 7th International Conference on Mobile Adhoc and Sensor Systems, MASS 2010
SP - 462
EP - 471
BT - 2010 IEEE 7th International Conference on Mobile Adhoc and Sensor Systems, MASS 2010
Y2 - 8 November 2010 through 12 November 2010
ER -