Figure 3 shows MAC loading of the protocols. It shows that for large networks, a relatively high number of messages are generated by OLSR and DSR based networks. This increases sharply with the number of nodes in the network. DSDV and AODV exhibit only moderate increases. The figure shows that the use of density based scheme as applied in AODV_EXT significantly reduces the number of routing messages in the network. The proposed scheme reduces the amount of messages retransmitted and for a network of 50 nodes, the improvement is by a factor of two over standard AODV.