Abstract—Wireless sensor networks (WSNs) were designed for
monitoring environment that is difficult to access. The energy of
each node has its limit and cannot be replaced or recharged. All
components of WSNs must be an energy efficient component, not
only hardware component but also software component. Energy
efficient routing protocol can prolong the networks lifetime.
Reactive WSNs is addressed in this work. A protocol using
static clustering technique with cluster head selection based on
maximum residual energy is proposed. Simulation is performed
to demonstrate the performance of the proposed protocol. It
is shown that the proposed protocol can prolong the network
lifetime better than that of the conventional protocols.