Event Coverage Detection and Event Source Determination in Underwater Wireless Sensor Networks

. 2015 Dec 15;15(12):31620–31643. doi: 10.3390/s151229875

Algorithm 1 Response for

H e a r t B t_{e v t}

control packets.

Require:

-
$u v_{r e l}$ ∈ $U V$ : a sensor node in the network
-
$U V_{h b}$ = $U V_{c l d}$ ⋃ $U V_{s i b}$ : a set of sensor nodes whose hop count is no smaller than that of $u v_{r e l}$ and whose $H e a r t B t_{e v t}$ control packets have been received by $u v_{r e l}$

Ensure:

1:
$c n t$ ← get the number of sensor nodes in $U V_{h b}$ whose tag is 1
2:
if ( $c n t$ = 0) or ( $c n t$ = 1 and $u v_{r e l}$ (tag) = 0) then
3:
return
4:
end if
5:
$u v_{r e l}$ broadcasts the control packet EPONG = < $u v_{r e l}$ , $n u l l$ , pid, HC( $u v_{r e l}$ ), energy, queue, null, $b i t_m a s k_{L_{p k t}}$ , $b i t_m a s k_{J R}$ , $c n t$ >