Distributed Image Compression Architecture over Wireless Multimedia Sensor Networks

Algorithm 1

Multihop hierarchical routing level setup.

if round == 1 then
BS broadcasts Level-Msg containing routing_level = 1.
if SN receives the broadcasting message then
if Message is Level-Msg then
if routing_level of node != 0 then
if routing_level of node > routing_level within received message then
Update routing_level of SN
if Node is CH then
routing_level routing_level + 1
Broadcast new Level-Msg (ID, routing_level)
end if
end if
Else
Update routing_level of SN with routing_level within received message
end if
else if Message is Level-Request-Msg then
if routing_level of node != 0 then
Send Reply-Request-Msg (ID, routing_level) to the requested SN
end if
End
else
Waiting for Level-Msg when T₁ is expired
if Node is CH then
Broadcast Level-Request-Msg (ID)
Waiting for Level-Reply-Msg when T₂ is expired
if Node receive Level-Reply-Msg then
if Node is CH then
Update routing_level of SN with routing_level within received message
routing_level routing_level + 1
Broadcast new Level-Msg (ID, routing_level)
end if
Else
Waiting for Level-Reply-Msg when T₃ is expired
routing_level 100
end if
Else
Waiting for Level-Msg when is expired
routing_level 100
end if
end if
end if