Algorithm 2: The emergency reporting performed inside a cluster.

for n ← 1 to #non–elected do

Check the emergency degree (ED);

if (EDn == critical) or (EDn == high) then

perform spectrum sensing;

if a free band (FB) is available then

% share the medium in the primary network;

send an emergency_message over FB;

wait for the detection of the CH or of the Vice-CH;

if EDn == critical then

send the measured data over the maximum packet size;

else

send the measured data over the restricted packet size;

end

else

% share the medium in the secondary network;

Access the secondary network over a CSMA protocol;

end

else

% share the medium in the secondary network;

Access the secondary network over a CSMA protocol;

end

end