Vinodkrishnan Kulathumani Anish Arora Mukundan Sridharan Murat Demirbas Trail: A distance-sensitive sensor network service for distributed object tracking. 2009 5 TOSN 2 http://doi.acm.org/10.1145/1498915.1498921 db/journals/tosn/tosn5.html#KulathumaniASD09