Congestion in wireless ad-hoc sensor networks not only causes packet loss and increases queueing delay, but also leads to unnecessary energy consumption. In these networks, two types of congestion can occur: node-level congestion, which is caused by buffer overflow in the node, or link-level congestion, when wireless channels are shared by several nodes arising in collisions.
['Alonso Silva', 'Patricio Reyes', 'Merouane Debbah']
Congestion in randomly deployed wireless ad-hoc and sensor networks