Table 1.

List of symbols.

Parameter	Meaning
$I_{se}^{\alpha }$	Dedicated sensing interval of application α
$I_{se}^c$	Consolidated sensing interval
τ	Sensor type
$RI$	Region of interest
Traffic rate ($R_p$)	The number of incoming data packets in a unit of time (i.e., 1 s)
Sleep interval ($I_s$)	The sleep period in a cycle
Active period ( $E_a$)	The total wakeup period in a cycle, which depends on the following two parameter
Periodic wakeup period ( $T_w$)	The period a node remains awake after waking up in every cycle if the node does not send or receive any packet
Extended wakeup period ($T_e$)	The extra period a node extends its wakeup time after receiving a packet
Cycle length ($T_{cycle}$)	The period between two consecutive sleep times; $T_{cycle}=I_s+E_a$
Number of received packets (k)	The number of packets a node receives in a cycle during its active period.