
Notation  Description 

r  The detection range 
δ  The duty cycle of the sensing device 
φ  The duty cycle of the transceiver 
(·)  The cumulative distribution function of random variable D 
 The longest delay specified by the user 
 The corresponding delay for 
DoC  Detectability in one cycle 
 The DoC of an event at point p 
 The lowest DoC all over the field 
 The wakeup probability of sensor Q 
(p)  The necessary wakeup probability of sensor at point p 
S(p)  The set of sensors covering point p 
U(Q)  The set of grid points contained by sensor Q 
