So, two mechanisms are proposed to overcome this
disadvantage. The first is MMBCR-route reply, where the
cost function is calculated in route reply phase instead of in
route request phase for selecting the route. And the other is
MMBCR with periodic route discovery to get more updated
information about the routes. In this method periodically the
route discovery process is done. If there are any changes in
the route, the route information is updated. Because of this
method, different routes are used for transmission of data
packets and periodic shifting between the routes which
avoids the over usage of nodes and node exhaustion leading
to the increase of the life time of the network.