  The increasing usage of wireless sensor networks in human life is an
indication of the high importance of this technology. Wireless sensor networks
have a vast majority of applications in monitoring and care which are known as
target tracking. In this application, the moving targets are monitored and
tracked in the environment. One of the most important challenges in this area
is the limited energy of the sensors. In this paper, we proposed a new
algorithm to reduce energy consumption by increasing the load balancing in the
network. The proposed algorithm consists of four phases. In the first phase,
which is the hole prevention phase, in each cluster, it is checked by the
cluster heads that if the energy level in an area of the cluster is less than
the threshold, a mobile node is sent to that area. The second phase is the
update phase. In this phase, the parameters required to detect a hole are
updated. In the third phase, the hole in the cluster is detected, and in the
fourth phase, the hole is covered by static or moving nodes. A comparison of
simulation results with the well-known and successful routing method in
wireless sensor networks show that the proposed method is suitable and working
properly.
